MDedge Neurology

True Blood casting call!

Lauren Bates/Moments/via Getty Images

If you’ve seen the show True Blood on HBO, you’re probably familiar with blood coming out instead of tears when any of the vampires start crying. Apparently, this interesting phenomenon isn’t unique to vampires on TV.

If you know about female anatomy, you know that the eyes aren’t usually involved in the menstrual cycle. However, a 25-year-old woman went to the ED when she experienced haemolacria, the term for blood tears, for the second time in 2 months during her cycle. She did not appear to have any injuries or illnesses that caused the eye bleeding, but physicians noted that both times she had eye bleeding, she also had her period.

Menstrual bleeding outside of the uterus, called vicarious menstruation, can occur, and it seems that the patient may have had that condition.

Since there are rumors of a True Blood remake circling, perhaps the show’s writers could blend in a little medical fact with vampire fiction.
 

What does skinny smell like? Lemons apparently

anilakkus/E+/via Getty Images

When you smell a lemon, what comes to your mind? How does it make you feel? Now think of the scent of vanilla. How does that one make you feel? Current research suggests certain smells may have an effect on how you perceive your body image.

Researchers from the University of Sussex (England) have found that certain olfactory stimuli (such as lemons and vanilla) and audio stimuli (light steps vs. heavy steps), have a moderate effect on self-image.

During their study, participants were put through a series of auditory and olfactory tests, from listening to stilettos and boots walking across the floor, to being exposed to certain essential oils with different sound pitches.

Exposure to lemon and higher-pitched sounds (like stilettos) made participants feel lighter and was associated with thin, spiky shapes. Exposure to vanilla and lower-pitched sounds was more associated with thicker, rounded shapes. This made researchers believe that multisensory stimuli, such as scents and sounds, can have a bigger role in treating eating disorders.

Our brain functions with multiple “mental models” of ourselves. Based on sensory stimuli from our day-to-day lives, those images and perceptions of ourselves change. Someone complimenting your snazzy new sweater provokes one self-perception, while someone letting you know that your fly is down provokes another.

Well, the researchers believe that, through a sense of smell, we can alter that perception of ourselves when paired with positive influence. Doing this through wearable “interactive clothes” could help boost the confidence and self-esteem of patients struggling with body image. Light smells equals light feelings. Of course, this won’t help the nearly 5% of the world who have some kind of smell disorder.

The researchers said that more research needs to be done, but you can do your own little experiment at home. Think about yourself and how you react to certain smells. How do they make you feel? If it makes you feel good, stop and smell more often.
 

Pregnancy with a side of pregnancy

It was a great day when Rebecca Roberts and her partner went to the obstetrician to confirm their positive pregnancy test. They’d been trying for more than a year without success, and now they would be having a baby. Note the usage of the singular there. That will become important in a moment.

When Ms. Roberts went back for her 12-week ultrasound appointment, there was an unexpected complication: Baby had become babies. The original fetus was there and doing fine, but there was now a second, less-developed fetus who’d invited herself in unannounced. While they were technically twins, the second fetus did not form at the same time, like normal fraternal twins, instead forming from an egg that was released weeks after the first egg was fertilized.

The phenomenon, called superfetation, is incredibly rare. Prior to 2008, there were fewer than 10 reported cases in the world, according to the European Journal of Obstetrics & Gynecology and Reproductive Biology. The odds of an egg being released during pregnancy, something that’s not supposed to happen, and then having that egg also become fertilized and successfully implanted in the uterus, is astronomically small.

It was not an easy pregnancy for Ms. Roberts, and at 33 weeks into the first pregnancy, the younger fetus’s umbilical cord began to malfunction, so delivery for both was induced in September 2020. Both infants spent time in the neonatal ICU, with the younger baby being in for 3 months, but after 6 months both are doing well and developing quickly. It’s always nice to have a happy ending to one of these weird medical phenomena, especially one with such an unpleasant-sounding name. If we didn’t know better, we’d think superfetation was something really, really smelly.
 

What’s a little misinformation among neighbors?

Frank Schiefelbein/EyeEm/via Getty Images

Vaccination will, hopefully, get the COVID-19 pandemic under control at some point, but the related misinformation floating around the Internet is another story. Already rampant in the United States, it’s now spreading … to Canada.

Investigators from that northern land took a look at the Twitter accounts of the platform’s 187,000 most active Canadian users and eventually ended up with a database of 147 million tweets, of which 154,000 contained terms associated with misinformation.

The Canadian social media users had more exposure to information from the United States than from Canada, and the exposure to U.S. outlets was more likely to involve misperceptions about COVID-19. “Most of the misinformation circulating on Twitter shared by Canadians was retweeted from U.S. sources,” the researchers said, and “Canadians who followed more American users were more likely to post misinformation.”

The study’s lead investigator, Aengus Bridgman of McGill University in Montreal, put it this way: “It’s hard for Canadian journalists, scientists, and public health experts to be heard by the average Canadian, given all the noise generated by American sources.”

People generally don’t take the time to read the fine print on contracts, and it looks like the Canadians have fallen into that trap. Not entirely their fault, of course, because most people coming from Canada to America don’t pass the Statue of Liberty, but she’s got some fine print of her own.

That poem written on the pedestal, the one that says, “Give me your tired, your poor, your huddled masses yearning to breathe free”? It’s actually a contract, and at the bottom, in very small print, it says, “In return for acceptance of the aforementioned ‘huddled masses,’ countries of origin agree to accept all of the social media noise generated by American sources.”

Sorry, Canada, but we gotcha.
 

True Blood casting call!

Lauren Bates/Moments/via Getty Images

If you’ve seen the show True Blood on HBO, you’re probably familiar with blood coming out instead of tears when any of the vampires start crying. Apparently, this interesting phenomenon isn’t unique to vampires on TV.

If you know about female anatomy, you know that the eyes aren’t usually involved in the menstrual cycle. However, a 25-year-old woman went to the ED when she experienced haemolacria, the term for blood tears, for the second time in 2 months during her cycle. She did not appear to have any injuries or illnesses that caused the eye bleeding, but physicians noted that both times she had eye bleeding, she also had her period.

Menstrual bleeding outside of the uterus, called vicarious menstruation, can occur, and it seems that the patient may have had that condition.

Since there are rumors of a True Blood remake circling, perhaps the show’s writers could blend in a little medical fact with vampire fiction.
 

What does skinny smell like? Lemons apparently

anilakkus/E+/via Getty Images

When you smell a lemon, what comes to your mind? How does it make you feel? Now think of the scent of vanilla. How does that one make you feel? Current research suggests certain smells may have an effect on how you perceive your body image.

Researchers from the University of Sussex (England) have found that certain olfactory stimuli (such as lemons and vanilla) and audio stimuli (light steps vs. heavy steps), have a moderate effect on self-image.

During their study, participants were put through a series of auditory and olfactory tests, from listening to stilettos and boots walking across the floor, to being exposed to certain essential oils with different sound pitches.

Exposure to lemon and higher-pitched sounds (like stilettos) made participants feel lighter and was associated with thin, spiky shapes. Exposure to vanilla and lower-pitched sounds was more associated with thicker, rounded shapes. This made researchers believe that multisensory stimuli, such as scents and sounds, can have a bigger role in treating eating disorders.

Our brain functions with multiple “mental models” of ourselves. Based on sensory stimuli from our day-to-day lives, those images and perceptions of ourselves change. Someone complimenting your snazzy new sweater provokes one self-perception, while someone letting you know that your fly is down provokes another.

Well, the researchers believe that, through a sense of smell, we can alter that perception of ourselves when paired with positive influence. Doing this through wearable “interactive clothes” could help boost the confidence and self-esteem of patients struggling with body image. Light smells equals light feelings. Of course, this won’t help the nearly 5% of the world who have some kind of smell disorder.

The researchers said that more research needs to be done, but you can do your own little experiment at home. Think about yourself and how you react to certain smells. How do they make you feel? If it makes you feel good, stop and smell more often.
 

Pregnancy with a side of pregnancy

It was a great day when Rebecca Roberts and her partner went to the obstetrician to confirm their positive pregnancy test. They’d been trying for more than a year without success, and now they would be having a baby. Note the usage of the singular there. That will become important in a moment.

When Ms. Roberts went back for her 12-week ultrasound appointment, there was an unexpected complication: Baby had become babies. The original fetus was there and doing fine, but there was now a second, less-developed fetus who’d invited herself in unannounced. While they were technically twins, the second fetus did not form at the same time, like normal fraternal twins, instead forming from an egg that was released weeks after the first egg was fertilized.

The phenomenon, called superfetation, is incredibly rare. Prior to 2008, there were fewer than 10 reported cases in the world, according to the European Journal of Obstetrics & Gynecology and Reproductive Biology. The odds of an egg being released during pregnancy, something that’s not supposed to happen, and then having that egg also become fertilized and successfully implanted in the uterus, is astronomically small.

It was not an easy pregnancy for Ms. Roberts, and at 33 weeks into the first pregnancy, the younger fetus’s umbilical cord began to malfunction, so delivery for both was induced in September 2020. Both infants spent time in the neonatal ICU, with the younger baby being in for 3 months, but after 6 months both are doing well and developing quickly. It’s always nice to have a happy ending to one of these weird medical phenomena, especially one with such an unpleasant-sounding name. If we didn’t know better, we’d think superfetation was something really, really smelly.
 

What’s a little misinformation among neighbors?

Frank Schiefelbein/EyeEm/via Getty Images

Vaccination will, hopefully, get the COVID-19 pandemic under control at some point, but the related misinformation floating around the Internet is another story. Already rampant in the United States, it’s now spreading … to Canada.

Investigators from that northern land took a look at the Twitter accounts of the platform’s 187,000 most active Canadian users and eventually ended up with a database of 147 million tweets, of which 154,000 contained terms associated with misinformation.

The Canadian social media users had more exposure to information from the United States than from Canada, and the exposure to U.S. outlets was more likely to involve misperceptions about COVID-19. “Most of the misinformation circulating on Twitter shared by Canadians was retweeted from U.S. sources,” the researchers said, and “Canadians who followed more American users were more likely to post misinformation.”

The study’s lead investigator, Aengus Bridgman of McGill University in Montreal, put it this way: “It’s hard for Canadian journalists, scientists, and public health experts to be heard by the average Canadian, given all the noise generated by American sources.”

People generally don’t take the time to read the fine print on contracts, and it looks like the Canadians have fallen into that trap. Not entirely their fault, of course, because most people coming from Canada to America don’t pass the Statue of Liberty, but she’s got some fine print of her own.

That poem written on the pedestal, the one that says, “Give me your tired, your poor, your huddled masses yearning to breathe free”? It’s actually a contract, and at the bottom, in very small print, it says, “In return for acceptance of the aforementioned ‘huddled masses,’ countries of origin agree to accept all of the social media noise generated by American sources.”

Sorry, Canada, but we gotcha.
 

True Blood casting call!

Lauren Bates/Moments/via Getty Images

If you’ve seen the show True Blood on HBO, you’re probably familiar with blood coming out instead of tears when any of the vampires start crying. Apparently, this interesting phenomenon isn’t unique to vampires on TV.

If you know about female anatomy, you know that the eyes aren’t usually involved in the menstrual cycle. However, a 25-year-old woman went to the ED when she experienced haemolacria, the term for blood tears, for the second time in 2 months during her cycle. She did not appear to have any injuries or illnesses that caused the eye bleeding, but physicians noted that both times she had eye bleeding, she also had her period.

Menstrual bleeding outside of the uterus, called vicarious menstruation, can occur, and it seems that the patient may have had that condition.

Since there are rumors of a True Blood remake circling, perhaps the show’s writers could blend in a little medical fact with vampire fiction.
 

What does skinny smell like? Lemons apparently

anilakkus/E+/via Getty Images

When you smell a lemon, what comes to your mind? How does it make you feel? Now think of the scent of vanilla. How does that one make you feel? Current research suggests certain smells may have an effect on how you perceive your body image.

Researchers from the University of Sussex (England) have found that certain olfactory stimuli (such as lemons and vanilla) and audio stimuli (light steps vs. heavy steps), have a moderate effect on self-image.

During their study, participants were put through a series of auditory and olfactory tests, from listening to stilettos and boots walking across the floor, to being exposed to certain essential oils with different sound pitches.

Exposure to lemon and higher-pitched sounds (like stilettos) made participants feel lighter and was associated with thin, spiky shapes. Exposure to vanilla and lower-pitched sounds was more associated with thicker, rounded shapes. This made researchers believe that multisensory stimuli, such as scents and sounds, can have a bigger role in treating eating disorders.

Our brain functions with multiple “mental models” of ourselves. Based on sensory stimuli from our day-to-day lives, those images and perceptions of ourselves change. Someone complimenting your snazzy new sweater provokes one self-perception, while someone letting you know that your fly is down provokes another.

Well, the researchers believe that, through a sense of smell, we can alter that perception of ourselves when paired with positive influence. Doing this through wearable “interactive clothes” could help boost the confidence and self-esteem of patients struggling with body image. Light smells equals light feelings. Of course, this won’t help the nearly 5% of the world who have some kind of smell disorder.

The researchers said that more research needs to be done, but you can do your own little experiment at home. Think about yourself and how you react to certain smells. How do they make you feel? If it makes you feel good, stop and smell more often.
 

Pregnancy with a side of pregnancy

It was a great day when Rebecca Roberts and her partner went to the obstetrician to confirm their positive pregnancy test. They’d been trying for more than a year without success, and now they would be having a baby. Note the usage of the singular there. That will become important in a moment.

When Ms. Roberts went back for her 12-week ultrasound appointment, there was an unexpected complication: Baby had become babies. The original fetus was there and doing fine, but there was now a second, less-developed fetus who’d invited herself in unannounced. While they were technically twins, the second fetus did not form at the same time, like normal fraternal twins, instead forming from an egg that was released weeks after the first egg was fertilized.

The phenomenon, called superfetation, is incredibly rare. Prior to 2008, there were fewer than 10 reported cases in the world, according to the European Journal of Obstetrics & Gynecology and Reproductive Biology. The odds of an egg being released during pregnancy, something that’s not supposed to happen, and then having that egg also become fertilized and successfully implanted in the uterus, is astronomically small.

It was not an easy pregnancy for Ms. Roberts, and at 33 weeks into the first pregnancy, the younger fetus’s umbilical cord began to malfunction, so delivery for both was induced in September 2020. Both infants spent time in the neonatal ICU, with the younger baby being in for 3 months, but after 6 months both are doing well and developing quickly. It’s always nice to have a happy ending to one of these weird medical phenomena, especially one with such an unpleasant-sounding name. If we didn’t know better, we’d think superfetation was something really, really smelly.
 

What’s a little misinformation among neighbors?

Frank Schiefelbein/EyeEm/via Getty Images

Vaccination will, hopefully, get the COVID-19 pandemic under control at some point, but the related misinformation floating around the Internet is another story. Already rampant in the United States, it’s now spreading … to Canada.

Investigators from that northern land took a look at the Twitter accounts of the platform’s 187,000 most active Canadian users and eventually ended up with a database of 147 million tweets, of which 154,000 contained terms associated with misinformation.

The Canadian social media users had more exposure to information from the United States than from Canada, and the exposure to U.S. outlets was more likely to involve misperceptions about COVID-19. “Most of the misinformation circulating on Twitter shared by Canadians was retweeted from U.S. sources,” the researchers said, and “Canadians who followed more American users were more likely to post misinformation.”

The study’s lead investigator, Aengus Bridgman of McGill University in Montreal, put it this way: “It’s hard for Canadian journalists, scientists, and public health experts to be heard by the average Canadian, given all the noise generated by American sources.”

People generally don’t take the time to read the fine print on contracts, and it looks like the Canadians have fallen into that trap. Not entirely their fault, of course, because most people coming from Canada to America don’t pass the Statue of Liberty, but she’s got some fine print of her own.

That poem written on the pedestal, the one that says, “Give me your tired, your poor, your huddled masses yearning to breathe free”? It’s actually a contract, and at the bottom, in very small print, it says, “In return for acceptance of the aforementioned ‘huddled masses,’ countries of origin agree to accept all of the social media noise generated by American sources.”

Sorry, Canada, but we gotcha.
 

An advisory committee to the Centers for Disease Control and Prevention is addressing the safety of the Johnson & Johnson COVID-19 vaccine on April 14, 2021, after the CDC and Food and Drug Administration recommended that states hold off on using it pending a detailed review of six cases of the same kind of rare but serious event – a blood clot in the vessels that drain blood from the brain combined with a large drop in platelets, which increases the risk for bleeding.

This combination can lead to severe strokes that can lead to brain damage or death. Among the six cases reported, which came to light over the past 3 weeks, one person died, according to the CDC. All six were women and ranged in age from 18 to 48 years.

According to a report from the Vaccine Adverse Event Reporting System (VAERS), which is maintained by the Department of Health & Human Services, the woman who died was 45. She developed a gradually worsening headache about a week after receiving the Johnson & Johnson vaccine.

On March 17, the day she came to the hospital, she was dry heaving. Her headache had suddenly gotten much worse, and the left side of her body was weak, which are signs of a stroke. A CT scan revealed both bleeding in her brain and a clot in her cortical vein. She died the following day.

In addition to VAERS, which accepts reports from anyone, the CDC and FDA are monitoring at least eight other safety systems maintained by hospitals, research centers, long-term care facilities, and insurance companies for signs of trouble with the vaccines. VAERS data is searchable and open to the public. Most of these systems are not publicly available to protect patient privacy. It’s unclear which systems detected the six cases cited by federal regulators.

“These are very serious and potentially fatal problems occurring in a healthy young adult. It’s serious and we need to get to the bottom of it,” said Ed Belongia, MD, director of the Center for Clinical Epidemiology and Population Health at the Marshfield (Wis.) Clinic Research Institute. Dr. Belongia leads a research team that helps the CDC monitor vaccine safety and effectiveness. 

“Safety is always the highest priority, and I think what we’ve seen here in the past 24 hours is our vaccine safety monitoring system is working,” he said.

Others agree. “I think what CDC and FDA have detected is a rare, but likely real adverse event associated with this vaccine,” said Paul Offit, MD, director of vaccine education at Children’s Hospital of Philadelphia.

Although much is still unknown about these events, they follow a similar pattern of blood clots reported with the AstraZeneca vaccine in Europe. That vaccine is now sold under the brand name Vaxzevria. 

This has experts questioning whether all vaccines of this type may cause these rare clots.

“I think it’s likely a class effect,” said Dr. Offit, who was a member of the FDA advisory committee that reviewed clinical trial data on the J&J vaccine before it was authorized for use.
 

Adenovirus vaccines scrutinized

Both the Johnson & Johnson and Vaxzevria vaccines use an adenovirus to ferry genetic instructions for making the coronaviruses spike protein into our cells.

Adenoviruses are common, relatively simple viruses that normally cause mild cold or flu symptoms. The ones used in the vaccine are disabled so they can’t make us sick. They’re more like Trojan horses. 

Once inside our cells, they release the DNA instructions they carry to make the spike protein of the new coronavirus. Those cells then crank out copies of the spike protein, which then get displayed on the outer surface of the cell membrane where they are recognized by the immune system. 

The immune system then makes antibodies and other defenses against the spike so that, when the real coronavirus comes along, our bodies are ready to fight the infection.

There’s no question the vaccine works. In clinical trials, the Johnson & Johnson vaccine was 66% percent effective at preventing against moderate to severe COVID-19 infection, and none of the patients who got COVID-19 after vaccination had to be admitted to the hospital or died.

The idea behind using adenoviruses in vaccines isn’t a new one. In a kind of fight-fire-with-fire approach, the idea is to use a virus, which is good at infecting us, to fight a different kind of virus.

Researchers have been working on the concept for about 10 years, but the COVID-19 vaccines that use this technology are some of the first adenovirus-vector vaccines deployed in humans. 

Only one other adenovirus vaccine, for Ebola, has been approved for use in humans. It was approved in Europe last year. Before the Johnson & Johnson vaccine, no other adenovirus vector has been available for use in humans in the United States.

There are six adenovirus-vector vaccines for COVID-19. In addition to AstraZeneca and Johnson & Johnson, there’s the Russian-developed vaccine Sputnik V, along with CanSino from China, and the Covishield vaccine in India.

Adenovirus vaccines are more stable than the mRNA vaccines. That makes them easier to store and transport. 

But they have a significant downside, too. Because adenoviruses infect humans out in the world, we already make antibodies against them. So there’s always a danger that our immune systems might recognize and react to the vaccine, rendering it ineffective. For that reason, scientists try to carefully select the adenovirus vectors, or carriers, they use.

The two vaccines under investigation for blood clots are slightly different. The Johnson & Johnson vaccine uses the vector AD26, because most of the population lacks preexisting immunity to it. Vaxzevria uses an adenovirus that infects chimpanzees, called ChAdOx1. 

Vaxzevria has been widely used in Europe but has not yet been authorized in the United States.

On April 7, the European Medicines Agency, Europe’s counterpart to the FDA, ruled that unusual blood clots with low blood platelets should be listed as rare side effects on the Vaxzevria vaccine.

The decision came after reviewing 62 cases of cerebral venous sinus thrombosis (CVST) linked to the vaccine and 25 cases of another rare type of clot, called a splanchnic vein thrombosis. Splanchnic veins drain blood from the major organs in the digestive system, including the stomach, liver, and intestines; 18 of those events were fatal.

The reports were culled from reporting in Europe and the United Kingdom, where around 25 million people have received the Vaxzevria vaccine, making these clots exceptionally rare, but serious.

So far, six cases of CVST have been reported in the United States, after more than 7 million doses of the Johnson & Johnson vaccines have been administered.

A key question for U.S. regulators will be the background rate for these types of rare combinations of clots and deplenished platelets. The background rate is the number of events that would be expected to occur naturally in a population of unvaccinated people. On a press call on April 13, Peter Marks, MD, PhD, director of the FDA’s Center for Biologics Evaluation and Research, was asked about the frequency of this dangerous combination. He said the combination of low platelets and clots was so rare that it was hard to pinpoint, but might be somewhere between 2 and 14 cases per million people over the course of a year.

The first Johnson & Johnson doses were given in early March. That means the six cases came to light within the first few weeks of use of the vaccine in the United States, a very short amount of time.

“These were six cases per million people for 2 weeks, which is the same thing as 25 million per year, so it’s clearly above the background rate,” Dr. Offit said.
 

Studies suggest possible mechanism

On April 9, the New England Journal of Medicine published a detailed evaluation of the 11 patients in Germany and Austria who developed the rare clots after their Vaxzevria vaccines.

The study detected rare antibodies to a signaling protein called platelet factor 4, which helps to coordinate clot formation.

These same type of antibodies form in some people given the blood thinning drug heparin. In those reactions, which are also exceptionally rare, the same type of syndrome develops, leading to large, devastating clots that consume circulating platelets.

It’s not yet clear whether people who develop reactions to the vaccines already have some platelet factor 4 antibodies before they are vaccinated, or whether the vaccines somehow spur the body to make these antibodies, which then launch a kind of autoimmune attack.

The researchers on the paper gave the syndrome a name, vaccine-induced thrombotic thrombocytopenia (VITT).

It’s also not clear why more cases seem to be in women than in men. Andrew Eisenberger, MD, an associate professor of hematology and oncology at Columbia University, New York, said the most common causes of cerebral venous sinus thrombosis have to do with conditions that raise estrogen levels, like pregnancy and hormonal contraception.

“Estrogen naturally leads to changes in several clotting proteins in the blood that may predispose to abnormal blood clotting in a few different sites in the body,” he said. “The clotting changes we are encountering with some of COVID-19 vaccines are likely to be synergistic with the effects of estrogen on the blood.”

No matter the cause, the CDC on April 13 alerted doctors to keep a high index of suspicion for VITT in patients who have received the Johnson & Johnson vaccination within the last 2 weeks. In those patients, the usual course of treatment with blood thinning drugs like heparin may be harmful.

Symptoms to watch for include severe headache or backache, new neurologic symptoms, severe abdominal pain, shortness of breath, leg swelling, tiny red spots on the skin, or easy bruising. 
 

Grappling with evidence

The CDC’s Advisory Committee on Immunization Practices will meet today in an emergency session to review the cases and see if any changes are needed to use of the J&J vaccine in the United States.

Last week, for example, the United Kingdom restricted the use of the AstraZeneca vaccine in people aged younger than 30 years, saying the risks and benefits of vaccination are “more finely balanced” for this age group.

With cases of COVID-19 rising again in the United States, and the Johnson & Johnson vaccine currently the most convenient form of protection against the virus, the committee will have to weigh the risks of that infection against the risk of rare clots caused by vaccination.

They will also likely have to rule out whether any of the cases had COVID. At least one study has reported CVST clots in three patients with confirmed COVID infections. In Europe, COVID infection did not seem to play a role in the formation of the clots with low platelets.

Hilda Bastian, PhD, a clinical trials expert who cofounded the Cochrane Collaboration, said it won’t be an easy task. Much will depend on how certain the committee members feel they know about all the events linked to the vaccine.

“That’s the really, really hard issue from my point of view for them right this moment. Have we missed any? Or how many are we likely to have missed?” asked Dr. Bastian, who lives in Australia.

“In a country that size with that fragmented [of] a health care system, how sure can you be that you know them all? That’s going to be a really difficult situation for them to grapple with, the quality of information that they’ve got,” she said.

A version of this article first appeared on Medscape.com.

An advisory committee to the Centers for Disease Control and Prevention is addressing the safety of the Johnson & Johnson COVID-19 vaccine on April 14, 2021, after the CDC and Food and Drug Administration recommended that states hold off on using it pending a detailed review of six cases of the same kind of rare but serious event – a blood clot in the vessels that drain blood from the brain combined with a large drop in platelets, which increases the risk for bleeding.

This combination can lead to severe strokes that can lead to brain damage or death. Among the six cases reported, which came to light over the past 3 weeks, one person died, according to the CDC. All six were women and ranged in age from 18 to 48 years.

According to a report from the Vaccine Adverse Event Reporting System (VAERS), which is maintained by the Department of Health & Human Services, the woman who died was 45. She developed a gradually worsening headache about a week after receiving the Johnson & Johnson vaccine.

On March 17, the day she came to the hospital, she was dry heaving. Her headache had suddenly gotten much worse, and the left side of her body was weak, which are signs of a stroke. A CT scan revealed both bleeding in her brain and a clot in her cortical vein. She died the following day.

In addition to VAERS, which accepts reports from anyone, the CDC and FDA are monitoring at least eight other safety systems maintained by hospitals, research centers, long-term care facilities, and insurance companies for signs of trouble with the vaccines. VAERS data is searchable and open to the public. Most of these systems are not publicly available to protect patient privacy. It’s unclear which systems detected the six cases cited by federal regulators.

“These are very serious and potentially fatal problems occurring in a healthy young adult. It’s serious and we need to get to the bottom of it,” said Ed Belongia, MD, director of the Center for Clinical Epidemiology and Population Health at the Marshfield (Wis.) Clinic Research Institute. Dr. Belongia leads a research team that helps the CDC monitor vaccine safety and effectiveness. 

“Safety is always the highest priority, and I think what we’ve seen here in the past 24 hours is our vaccine safety monitoring system is working,” he said.

Others agree. “I think what CDC and FDA have detected is a rare, but likely real adverse event associated with this vaccine,” said Paul Offit, MD, director of vaccine education at Children’s Hospital of Philadelphia.

Although much is still unknown about these events, they follow a similar pattern of blood clots reported with the AstraZeneca vaccine in Europe. That vaccine is now sold under the brand name Vaxzevria. 

This has experts questioning whether all vaccines of this type may cause these rare clots.

“I think it’s likely a class effect,” said Dr. Offit, who was a member of the FDA advisory committee that reviewed clinical trial data on the J&J vaccine before it was authorized for use.
 

Adenovirus vaccines scrutinized

Both the Johnson & Johnson and Vaxzevria vaccines use an adenovirus to ferry genetic instructions for making the coronaviruses spike protein into our cells.

Adenoviruses are common, relatively simple viruses that normally cause mild cold or flu symptoms. The ones used in the vaccine are disabled so they can’t make us sick. They’re more like Trojan horses. 

Once inside our cells, they release the DNA instructions they carry to make the spike protein of the new coronavirus. Those cells then crank out copies of the spike protein, which then get displayed on the outer surface of the cell membrane where they are recognized by the immune system. 

The immune system then makes antibodies and other defenses against the spike so that, when the real coronavirus comes along, our bodies are ready to fight the infection.

There’s no question the vaccine works. In clinical trials, the Johnson & Johnson vaccine was 66% percent effective at preventing against moderate to severe COVID-19 infection, and none of the patients who got COVID-19 after vaccination had to be admitted to the hospital or died.

The idea behind using adenoviruses in vaccines isn’t a new one. In a kind of fight-fire-with-fire approach, the idea is to use a virus, which is good at infecting us, to fight a different kind of virus.

Researchers have been working on the concept for about 10 years, but the COVID-19 vaccines that use this technology are some of the first adenovirus-vector vaccines deployed in humans. 

Only one other adenovirus vaccine, for Ebola, has been approved for use in humans. It was approved in Europe last year. Before the Johnson & Johnson vaccine, no other adenovirus vector has been available for use in humans in the United States.

There are six adenovirus-vector vaccines for COVID-19. In addition to AstraZeneca and Johnson & Johnson, there’s the Russian-developed vaccine Sputnik V, along with CanSino from China, and the Covishield vaccine in India.

Adenovirus vaccines are more stable than the mRNA vaccines. That makes them easier to store and transport. 

But they have a significant downside, too. Because adenoviruses infect humans out in the world, we already make antibodies against them. So there’s always a danger that our immune systems might recognize and react to the vaccine, rendering it ineffective. For that reason, scientists try to carefully select the adenovirus vectors, or carriers, they use.

The two vaccines under investigation for blood clots are slightly different. The Johnson & Johnson vaccine uses the vector AD26, because most of the population lacks preexisting immunity to it. Vaxzevria uses an adenovirus that infects chimpanzees, called ChAdOx1. 

Vaxzevria has been widely used in Europe but has not yet been authorized in the United States.

On April 7, the European Medicines Agency, Europe’s counterpart to the FDA, ruled that unusual blood clots with low blood platelets should be listed as rare side effects on the Vaxzevria vaccine.

The decision came after reviewing 62 cases of cerebral venous sinus thrombosis (CVST) linked to the vaccine and 25 cases of another rare type of clot, called a splanchnic vein thrombosis. Splanchnic veins drain blood from the major organs in the digestive system, including the stomach, liver, and intestines; 18 of those events were fatal.

The reports were culled from reporting in Europe and the United Kingdom, where around 25 million people have received the Vaxzevria vaccine, making these clots exceptionally rare, but serious.

So far, six cases of CVST have been reported in the United States, after more than 7 million doses of the Johnson & Johnson vaccines have been administered.

A key question for U.S. regulators will be the background rate for these types of rare combinations of clots and deplenished platelets. The background rate is the number of events that would be expected to occur naturally in a population of unvaccinated people. On a press call on April 13, Peter Marks, MD, PhD, director of the FDA’s Center for Biologics Evaluation and Research, was asked about the frequency of this dangerous combination. He said the combination of low platelets and clots was so rare that it was hard to pinpoint, but might be somewhere between 2 and 14 cases per million people over the course of a year.

The first Johnson & Johnson doses were given in early March. That means the six cases came to light within the first few weeks of use of the vaccine in the United States, a very short amount of time.

“These were six cases per million people for 2 weeks, which is the same thing as 25 million per year, so it’s clearly above the background rate,” Dr. Offit said.
 

Studies suggest possible mechanism

On April 9, the New England Journal of Medicine published a detailed evaluation of the 11 patients in Germany and Austria who developed the rare clots after their Vaxzevria vaccines.

The study detected rare antibodies to a signaling protein called platelet factor 4, which helps to coordinate clot formation.

These same type of antibodies form in some people given the blood thinning drug heparin. In those reactions, which are also exceptionally rare, the same type of syndrome develops, leading to large, devastating clots that consume circulating platelets.

It’s not yet clear whether people who develop reactions to the vaccines already have some platelet factor 4 antibodies before they are vaccinated, or whether the vaccines somehow spur the body to make these antibodies, which then launch a kind of autoimmune attack.

The researchers on the paper gave the syndrome a name, vaccine-induced thrombotic thrombocytopenia (VITT).

It’s also not clear why more cases seem to be in women than in men. Andrew Eisenberger, MD, an associate professor of hematology and oncology at Columbia University, New York, said the most common causes of cerebral venous sinus thrombosis have to do with conditions that raise estrogen levels, like pregnancy and hormonal contraception.

“Estrogen naturally leads to changes in several clotting proteins in the blood that may predispose to abnormal blood clotting in a few different sites in the body,” he said. “The clotting changes we are encountering with some of COVID-19 vaccines are likely to be synergistic with the effects of estrogen on the blood.”

No matter the cause, the CDC on April 13 alerted doctors to keep a high index of suspicion for VITT in patients who have received the Johnson & Johnson vaccination within the last 2 weeks. In those patients, the usual course of treatment with blood thinning drugs like heparin may be harmful.

Symptoms to watch for include severe headache or backache, new neurologic symptoms, severe abdominal pain, shortness of breath, leg swelling, tiny red spots on the skin, or easy bruising. 
 

Grappling with evidence

The CDC’s Advisory Committee on Immunization Practices will meet today in an emergency session to review the cases and see if any changes are needed to use of the J&J vaccine in the United States.

Last week, for example, the United Kingdom restricted the use of the AstraZeneca vaccine in people aged younger than 30 years, saying the risks and benefits of vaccination are “more finely balanced” for this age group.

With cases of COVID-19 rising again in the United States, and the Johnson & Johnson vaccine currently the most convenient form of protection against the virus, the committee will have to weigh the risks of that infection against the risk of rare clots caused by vaccination.

They will also likely have to rule out whether any of the cases had COVID. At least one study has reported CVST clots in three patients with confirmed COVID infections. In Europe, COVID infection did not seem to play a role in the formation of the clots with low platelets.

Hilda Bastian, PhD, a clinical trials expert who cofounded the Cochrane Collaboration, said it won’t be an easy task. Much will depend on how certain the committee members feel they know about all the events linked to the vaccine.

“That’s the really, really hard issue from my point of view for them right this moment. Have we missed any? Or how many are we likely to have missed?” asked Dr. Bastian, who lives in Australia.

“In a country that size with that fragmented [of] a health care system, how sure can you be that you know them all? That’s going to be a really difficult situation for them to grapple with, the quality of information that they’ve got,” she said.

A version of this article first appeared on Medscape.com.

An advisory committee to the Centers for Disease Control and Prevention is addressing the safety of the Johnson & Johnson COVID-19 vaccine on April 14, 2021, after the CDC and Food and Drug Administration recommended that states hold off on using it pending a detailed review of six cases of the same kind of rare but serious event – a blood clot in the vessels that drain blood from the brain combined with a large drop in platelets, which increases the risk for bleeding.

This combination can lead to severe strokes that can lead to brain damage or death. Among the six cases reported, which came to light over the past 3 weeks, one person died, according to the CDC. All six were women and ranged in age from 18 to 48 years.

According to a report from the Vaccine Adverse Event Reporting System (VAERS), which is maintained by the Department of Health & Human Services, the woman who died was 45. She developed a gradually worsening headache about a week after receiving the Johnson & Johnson vaccine.

On March 17, the day she came to the hospital, she was dry heaving. Her headache had suddenly gotten much worse, and the left side of her body was weak, which are signs of a stroke. A CT scan revealed both bleeding in her brain and a clot in her cortical vein. She died the following day.

In addition to VAERS, which accepts reports from anyone, the CDC and FDA are monitoring at least eight other safety systems maintained by hospitals, research centers, long-term care facilities, and insurance companies for signs of trouble with the vaccines. VAERS data is searchable and open to the public. Most of these systems are not publicly available to protect patient privacy. It’s unclear which systems detected the six cases cited by federal regulators.

“These are very serious and potentially fatal problems occurring in a healthy young adult. It’s serious and we need to get to the bottom of it,” said Ed Belongia, MD, director of the Center for Clinical Epidemiology and Population Health at the Marshfield (Wis.) Clinic Research Institute. Dr. Belongia leads a research team that helps the CDC monitor vaccine safety and effectiveness. 

“Safety is always the highest priority, and I think what we’ve seen here in the past 24 hours is our vaccine safety monitoring system is working,” he said.

Others agree. “I think what CDC and FDA have detected is a rare, but likely real adverse event associated with this vaccine,” said Paul Offit, MD, director of vaccine education at Children’s Hospital of Philadelphia.

Although much is still unknown about these events, they follow a similar pattern of blood clots reported with the AstraZeneca vaccine in Europe. That vaccine is now sold under the brand name Vaxzevria. 

This has experts questioning whether all vaccines of this type may cause these rare clots.

“I think it’s likely a class effect,” said Dr. Offit, who was a member of the FDA advisory committee that reviewed clinical trial data on the J&J vaccine before it was authorized for use.
 

Adenovirus vaccines scrutinized

Both the Johnson & Johnson and Vaxzevria vaccines use an adenovirus to ferry genetic instructions for making the coronaviruses spike protein into our cells.

Adenoviruses are common, relatively simple viruses that normally cause mild cold or flu symptoms. The ones used in the vaccine are disabled so they can’t make us sick. They’re more like Trojan horses. 

Once inside our cells, they release the DNA instructions they carry to make the spike protein of the new coronavirus. Those cells then crank out copies of the spike protein, which then get displayed on the outer surface of the cell membrane where they are recognized by the immune system. 

The immune system then makes antibodies and other defenses against the spike so that, when the real coronavirus comes along, our bodies are ready to fight the infection.

There’s no question the vaccine works. In clinical trials, the Johnson & Johnson vaccine was 66% percent effective at preventing against moderate to severe COVID-19 infection, and none of the patients who got COVID-19 after vaccination had to be admitted to the hospital or died.

The idea behind using adenoviruses in vaccines isn’t a new one. In a kind of fight-fire-with-fire approach, the idea is to use a virus, which is good at infecting us, to fight a different kind of virus.

Researchers have been working on the concept for about 10 years, but the COVID-19 vaccines that use this technology are some of the first adenovirus-vector vaccines deployed in humans. 

Only one other adenovirus vaccine, for Ebola, has been approved for use in humans. It was approved in Europe last year. Before the Johnson & Johnson vaccine, no other adenovirus vector has been available for use in humans in the United States.

There are six adenovirus-vector vaccines for COVID-19. In addition to AstraZeneca and Johnson & Johnson, there’s the Russian-developed vaccine Sputnik V, along with CanSino from China, and the Covishield vaccine in India.

Adenovirus vaccines are more stable than the mRNA vaccines. That makes them easier to store and transport. 

But they have a significant downside, too. Because adenoviruses infect humans out in the world, we already make antibodies against them. So there’s always a danger that our immune systems might recognize and react to the vaccine, rendering it ineffective. For that reason, scientists try to carefully select the adenovirus vectors, or carriers, they use.

The two vaccines under investigation for blood clots are slightly different. The Johnson & Johnson vaccine uses the vector AD26, because most of the population lacks preexisting immunity to it. Vaxzevria uses an adenovirus that infects chimpanzees, called ChAdOx1. 

Vaxzevria has been widely used in Europe but has not yet been authorized in the United States.

On April 7, the European Medicines Agency, Europe’s counterpart to the FDA, ruled that unusual blood clots with low blood platelets should be listed as rare side effects on the Vaxzevria vaccine.

The decision came after reviewing 62 cases of cerebral venous sinus thrombosis (CVST) linked to the vaccine and 25 cases of another rare type of clot, called a splanchnic vein thrombosis. Splanchnic veins drain blood from the major organs in the digestive system, including the stomach, liver, and intestines; 18 of those events were fatal.

The reports were culled from reporting in Europe and the United Kingdom, where around 25 million people have received the Vaxzevria vaccine, making these clots exceptionally rare, but serious.

So far, six cases of CVST have been reported in the United States, after more than 7 million doses of the Johnson & Johnson vaccines have been administered.

A key question for U.S. regulators will be the background rate for these types of rare combinations of clots and deplenished platelets. The background rate is the number of events that would be expected to occur naturally in a population of unvaccinated people. On a press call on April 13, Peter Marks, MD, PhD, director of the FDA’s Center for Biologics Evaluation and Research, was asked about the frequency of this dangerous combination. He said the combination of low platelets and clots was so rare that it was hard to pinpoint, but might be somewhere between 2 and 14 cases per million people over the course of a year.

The first Johnson & Johnson doses were given in early March. That means the six cases came to light within the first few weeks of use of the vaccine in the United States, a very short amount of time.

“These were six cases per million people for 2 weeks, which is the same thing as 25 million per year, so it’s clearly above the background rate,” Dr. Offit said.
 

Studies suggest possible mechanism

On April 9, the New England Journal of Medicine published a detailed evaluation of the 11 patients in Germany and Austria who developed the rare clots after their Vaxzevria vaccines.

The study detected rare antibodies to a signaling protein called platelet factor 4, which helps to coordinate clot formation.

These same type of antibodies form in some people given the blood thinning drug heparin. In those reactions, which are also exceptionally rare, the same type of syndrome develops, leading to large, devastating clots that consume circulating platelets.

It’s not yet clear whether people who develop reactions to the vaccines already have some platelet factor 4 antibodies before they are vaccinated, or whether the vaccines somehow spur the body to make these antibodies, which then launch a kind of autoimmune attack.

The researchers on the paper gave the syndrome a name, vaccine-induced thrombotic thrombocytopenia (VITT).

It’s also not clear why more cases seem to be in women than in men. Andrew Eisenberger, MD, an associate professor of hematology and oncology at Columbia University, New York, said the most common causes of cerebral venous sinus thrombosis have to do with conditions that raise estrogen levels, like pregnancy and hormonal contraception.

“Estrogen naturally leads to changes in several clotting proteins in the blood that may predispose to abnormal blood clotting in a few different sites in the body,” he said. “The clotting changes we are encountering with some of COVID-19 vaccines are likely to be synergistic with the effects of estrogen on the blood.”

No matter the cause, the CDC on April 13 alerted doctors to keep a high index of suspicion for VITT in patients who have received the Johnson & Johnson vaccination within the last 2 weeks. In those patients, the usual course of treatment with blood thinning drugs like heparin may be harmful.

Symptoms to watch for include severe headache or backache, new neurologic symptoms, severe abdominal pain, shortness of breath, leg swelling, tiny red spots on the skin, or easy bruising. 
 

Grappling with evidence

The CDC’s Advisory Committee on Immunization Practices will meet today in an emergency session to review the cases and see if any changes are needed to use of the J&J vaccine in the United States.

Last week, for example, the United Kingdom restricted the use of the AstraZeneca vaccine in people aged younger than 30 years, saying the risks and benefits of vaccination are “more finely balanced” for this age group.

With cases of COVID-19 rising again in the United States, and the Johnson & Johnson vaccine currently the most convenient form of protection against the virus, the committee will have to weigh the risks of that infection against the risk of rare clots caused by vaccination.

They will also likely have to rule out whether any of the cases had COVID. At least one study has reported CVST clots in three patients with confirmed COVID infections. In Europe, COVID infection did not seem to play a role in the formation of the clots with low platelets.

Hilda Bastian, PhD, a clinical trials expert who cofounded the Cochrane Collaboration, said it won’t be an easy task. Much will depend on how certain the committee members feel they know about all the events linked to the vaccine.

“That’s the really, really hard issue from my point of view for them right this moment. Have we missed any? Or how many are we likely to have missed?” asked Dr. Bastian, who lives in Australia.

“In a country that size with that fragmented [of] a health care system, how sure can you be that you know them all? That’s going to be a really difficult situation for them to grapple with, the quality of information that they’ve got,” she said.

A version of this article first appeared on Medscape.com.

Previous and concomitant triptan therapy bears no effect on ubrogepant efficacy and tolerability, according to a study published in Headache.

“The goal is to get migraine attacks under control as quickly as you can with as few adverse events as possible,” said lead author Andrew Blumenfeld, MD, director of the Headache Center of Southern California in Carlsbad, California. “Ubrogepant is very efficacious and well tolerated because it has few adverse events.”

Migraine disorder is the third most prevalent disease, and at least one person living in 25% of all U.S. households has the condition.

Clinicians have a wide range of medications at their disposal to treat migraines. These drug classes include triptans, ditans, NSAIDs, dihydroergotamine, and combination analgesics. Although numerous pharmacologic options are available to manage this patient population, an estimated 95% of patients who take oral medications to alleviate their migraine symptoms still fail to achieve relief with at least one acute episode.

Triptans remain a common option and first-line choice for acute migraine relief, but poor tolerability, among other factors, continue to limit their effectiveness. Moreover, their vasoconstrictive properties preclude their use in specific patient populations, such as those who have hypertension, peripheral vascular disease, and cerebral vascular accident. These circumstances, combined with other unmet clinical needs in migraine, have prompted researchers to explore new options, including a newer class of drugs – CGRP receptor antagonists. An endogenous protein, CGRP, has inflammatory and pronociceptive properties that play an active role in contributing to migraine pathogenesis.
 

Efficacy analyzed by triptan response

To investigate the effects of anti-CGRP treatment in patients with migraine who have a previous history of triptan use, researchers conducted two phase 3, randomized, double-blind, multicenter, single-attack trials, known as ACHIEVE I and ACHIEVE II.

Trial participants ranged in age from 18 to 75 years with a documented history of migraines with or without aura. In ACHIEVE I, investigators randomized 1,327 participants 1:1:1 to receive placebo, ubrogepant 50 mg, or ubrogepant 100 mg and placebo. Randomized patients in ACHIEVE II (n = 1,355) received placebo, ubrogepant 25 mg, or ubrogepant 50 mg to treat a single episode. During the screening process, researchers further placed patients in one of three groups based on their previous triptan use – triptan responder, triptan-insufficient responder, and triptan naive. Patients were further randomized based on their previous experience with triptans and whether they currently used them for migraine prevention. Patients participating in the study had up to 60 days to treat one qualifying migraine of moderate or severe nature at home.

The studies had two primary endpoints. The first was freedom from pain at the 2-hour mark following the initial dose, defined as decreased headache severity from moderate or severe at baseline to no pain. The other primary endpoint was the absence of most bothersome migraine-associated symptom (MBS) – photophobia, phonophobia, or nausea – 2 hours after the initial ubrogepant dose.

The pooled analysis collated data from 1,799 patients in both studies (placebo, n = 912; ubrogepant 50 mg, n = 887). Patients fell into the following categories: 682 triptan responders (placebo, n = 350; ubrogepant, n = 332); 451 triptan-insufficient responders (placebo, n = 223; ubrogepant, n = 228), and 666 triptan naive (placebo, n = 339; ubrogepant, n = 337).

Based on the data, approximately 25% of the patients enrolled in the study fell into the triptan-insufficient category. Of this subpopulation, about 80% of the patients in each treatment group experienced insufficient efficacy when using triptans. In each treatment group of insufficient responders, approximately 17% of patients cited tolerability issues, and 3% had contraindications that precluded them from triptan therapy.

The incidence of treatment-emergent adverse events (TEAEs) and treatment-related TEAEs did not differ appreciably across historical triptan experience subgroups. The highest percentage of participants experiencing a treatment-related TEAE in the pooled ubrogepant 50-mg treatment group was found in the triptan-insufficient responders (10.4%), whereas the highest percentage in the placebo group was found in the triptan-naive subgroup (9.7%). No serious AEs (SAEs) were reported in any subgroup.

The researchers concluded that “ubrogepant efficacy and tolerability did not differ for the acute treatment of migraine in participants classified as triptan responders, triptan-insufficient responders, and triptan naive based on their historical experience with triptans.”
 

Payers limit use

Despite the promising data, payer hurdles limit ubrogepant’s use, said Stewart Tepper, MD, who was asked to comment on the study. Dr. Tepper, a professor of neurology at the Geisel School of Medicine at Dartmouth, Hanover, N.H., was not involved in the study. “The study shows that ubrogepant will work as well as those who have not responded well to triptans, which is key,” Dr. Tepper said. “However, payers have set up step edits in which patients aren’t allowed to get ubrogepant unless they fail therapy with at least two triptans.”

Dr. Blumenfeld discounts the rationale behind requiring patients to try a second triptan after failing initial triptan therapy. “There are plenty of studies showing that if you fail one triptan, you’re likely to fail another,” he said. “Why would you put the patient on a different triptan when you could switch them to another drug with a different mechanism of action?”

The results showed that more patients in the ubrogepant 50-mg arm achieved pain freedom than those in the placebo arm within 2 hours after the initial dose in each group.

“Migraine is a very disabling condition, so you want to get the attack under control as quickly as possible while limiting the risk for potential side effects,” said Dr. Blumenfeld. “Ubrogepant is very efficacious and with very few adverse effects, but its use is limited because insurance companies require the failure of several triptans.”

One limitation of the study is that it is a subanalysis.

Dr. Blumenfeld has disclosed advisory board service, consulting, speaking, and authorship for AbbVie, Alder, Amgen, Biohaven, Lilly, Novartis, Teva, Theranica, and Zoscano.

Previous and concomitant triptan therapy bears no effect on ubrogepant efficacy and tolerability, according to a study published in Headache.

“The goal is to get migraine attacks under control as quickly as you can with as few adverse events as possible,” said lead author Andrew Blumenfeld, MD, director of the Headache Center of Southern California in Carlsbad, California. “Ubrogepant is very efficacious and well tolerated because it has few adverse events.”

Migraine disorder is the third most prevalent disease, and at least one person living in 25% of all U.S. households has the condition.

Clinicians have a wide range of medications at their disposal to treat migraines. These drug classes include triptans, ditans, NSAIDs, dihydroergotamine, and combination analgesics. Although numerous pharmacologic options are available to manage this patient population, an estimated 95% of patients who take oral medications to alleviate their migraine symptoms still fail to achieve relief with at least one acute episode.

Triptans remain a common option and first-line choice for acute migraine relief, but poor tolerability, among other factors, continue to limit their effectiveness. Moreover, their vasoconstrictive properties preclude their use in specific patient populations, such as those who have hypertension, peripheral vascular disease, and cerebral vascular accident. These circumstances, combined with other unmet clinical needs in migraine, have prompted researchers to explore new options, including a newer class of drugs – CGRP receptor antagonists. An endogenous protein, CGRP, has inflammatory and pronociceptive properties that play an active role in contributing to migraine pathogenesis.
 

Efficacy analyzed by triptan response

To investigate the effects of anti-CGRP treatment in patients with migraine who have a previous history of triptan use, researchers conducted two phase 3, randomized, double-blind, multicenter, single-attack trials, known as ACHIEVE I and ACHIEVE II.

Trial participants ranged in age from 18 to 75 years with a documented history of migraines with or without aura. In ACHIEVE I, investigators randomized 1,327 participants 1:1:1 to receive placebo, ubrogepant 50 mg, or ubrogepant 100 mg and placebo. Randomized patients in ACHIEVE II (n = 1,355) received placebo, ubrogepant 25 mg, or ubrogepant 50 mg to treat a single episode. During the screening process, researchers further placed patients in one of three groups based on their previous triptan use – triptan responder, triptan-insufficient responder, and triptan naive. Patients were further randomized based on their previous experience with triptans and whether they currently used them for migraine prevention. Patients participating in the study had up to 60 days to treat one qualifying migraine of moderate or severe nature at home.

The studies had two primary endpoints. The first was freedom from pain at the 2-hour mark following the initial dose, defined as decreased headache severity from moderate or severe at baseline to no pain. The other primary endpoint was the absence of most bothersome migraine-associated symptom (MBS) – photophobia, phonophobia, or nausea – 2 hours after the initial ubrogepant dose.

The pooled analysis collated data from 1,799 patients in both studies (placebo, n = 912; ubrogepant 50 mg, n = 887). Patients fell into the following categories: 682 triptan responders (placebo, n = 350; ubrogepant, n = 332); 451 triptan-insufficient responders (placebo, n = 223; ubrogepant, n = 228), and 666 triptan naive (placebo, n = 339; ubrogepant, n = 337).

Based on the data, approximately 25% of the patients enrolled in the study fell into the triptan-insufficient category. Of this subpopulation, about 80% of the patients in each treatment group experienced insufficient efficacy when using triptans. In each treatment group of insufficient responders, approximately 17% of patients cited tolerability issues, and 3% had contraindications that precluded them from triptan therapy.

The incidence of treatment-emergent adverse events (TEAEs) and treatment-related TEAEs did not differ appreciably across historical triptan experience subgroups. The highest percentage of participants experiencing a treatment-related TEAE in the pooled ubrogepant 50-mg treatment group was found in the triptan-insufficient responders (10.4%), whereas the highest percentage in the placebo group was found in the triptan-naive subgroup (9.7%). No serious AEs (SAEs) were reported in any subgroup.

The researchers concluded that “ubrogepant efficacy and tolerability did not differ for the acute treatment of migraine in participants classified as triptan responders, triptan-insufficient responders, and triptan naive based on their historical experience with triptans.”
 

Payers limit use

Despite the promising data, payer hurdles limit ubrogepant’s use, said Stewart Tepper, MD, who was asked to comment on the study. Dr. Tepper, a professor of neurology at the Geisel School of Medicine at Dartmouth, Hanover, N.H., was not involved in the study. “The study shows that ubrogepant will work as well as those who have not responded well to triptans, which is key,” Dr. Tepper said. “However, payers have set up step edits in which patients aren’t allowed to get ubrogepant unless they fail therapy with at least two triptans.”

Dr. Blumenfeld discounts the rationale behind requiring patients to try a second triptan after failing initial triptan therapy. “There are plenty of studies showing that if you fail one triptan, you’re likely to fail another,” he said. “Why would you put the patient on a different triptan when you could switch them to another drug with a different mechanism of action?”

The results showed that more patients in the ubrogepant 50-mg arm achieved pain freedom than those in the placebo arm within 2 hours after the initial dose in each group.

“Migraine is a very disabling condition, so you want to get the attack under control as quickly as possible while limiting the risk for potential side effects,” said Dr. Blumenfeld. “Ubrogepant is very efficacious and with very few adverse effects, but its use is limited because insurance companies require the failure of several triptans.”

One limitation of the study is that it is a subanalysis.

Dr. Blumenfeld has disclosed advisory board service, consulting, speaking, and authorship for AbbVie, Alder, Amgen, Biohaven, Lilly, Novartis, Teva, Theranica, and Zoscano.

Previous and concomitant triptan therapy bears no effect on ubrogepant efficacy and tolerability, according to a study published in Headache.

“The goal is to get migraine attacks under control as quickly as you can with as few adverse events as possible,” said lead author Andrew Blumenfeld, MD, director of the Headache Center of Southern California in Carlsbad, California. “Ubrogepant is very efficacious and well tolerated because it has few adverse events.”

Migraine disorder is the third most prevalent disease, and at least one person living in 25% of all U.S. households has the condition.

Clinicians have a wide range of medications at their disposal to treat migraines. These drug classes include triptans, ditans, NSAIDs, dihydroergotamine, and combination analgesics. Although numerous pharmacologic options are available to manage this patient population, an estimated 95% of patients who take oral medications to alleviate their migraine symptoms still fail to achieve relief with at least one acute episode.

Triptans remain a common option and first-line choice for acute migraine relief, but poor tolerability, among other factors, continue to limit their effectiveness. Moreover, their vasoconstrictive properties preclude their use in specific patient populations, such as those who have hypertension, peripheral vascular disease, and cerebral vascular accident. These circumstances, combined with other unmet clinical needs in migraine, have prompted researchers to explore new options, including a newer class of drugs – CGRP receptor antagonists. An endogenous protein, CGRP, has inflammatory and pronociceptive properties that play an active role in contributing to migraine pathogenesis.
 

Efficacy analyzed by triptan response

To investigate the effects of anti-CGRP treatment in patients with migraine who have a previous history of triptan use, researchers conducted two phase 3, randomized, double-blind, multicenter, single-attack trials, known as ACHIEVE I and ACHIEVE II.

Trial participants ranged in age from 18 to 75 years with a documented history of migraines with or without aura. In ACHIEVE I, investigators randomized 1,327 participants 1:1:1 to receive placebo, ubrogepant 50 mg, or ubrogepant 100 mg and placebo. Randomized patients in ACHIEVE II (n = 1,355) received placebo, ubrogepant 25 mg, or ubrogepant 50 mg to treat a single episode. During the screening process, researchers further placed patients in one of three groups based on their previous triptan use – triptan responder, triptan-insufficient responder, and triptan naive. Patients were further randomized based on their previous experience with triptans and whether they currently used them for migraine prevention. Patients participating in the study had up to 60 days to treat one qualifying migraine of moderate or severe nature at home.

The studies had two primary endpoints. The first was freedom from pain at the 2-hour mark following the initial dose, defined as decreased headache severity from moderate or severe at baseline to no pain. The other primary endpoint was the absence of most bothersome migraine-associated symptom (MBS) – photophobia, phonophobia, or nausea – 2 hours after the initial ubrogepant dose.

The pooled analysis collated data from 1,799 patients in both studies (placebo, n = 912; ubrogepant 50 mg, n = 887). Patients fell into the following categories: 682 triptan responders (placebo, n = 350; ubrogepant, n = 332); 451 triptan-insufficient responders (placebo, n = 223; ubrogepant, n = 228), and 666 triptan naive (placebo, n = 339; ubrogepant, n = 337).

Based on the data, approximately 25% of the patients enrolled in the study fell into the triptan-insufficient category. Of this subpopulation, about 80% of the patients in each treatment group experienced insufficient efficacy when using triptans. In each treatment group of insufficient responders, approximately 17% of patients cited tolerability issues, and 3% had contraindications that precluded them from triptan therapy.

The incidence of treatment-emergent adverse events (TEAEs) and treatment-related TEAEs did not differ appreciably across historical triptan experience subgroups. The highest percentage of participants experiencing a treatment-related TEAE in the pooled ubrogepant 50-mg treatment group was found in the triptan-insufficient responders (10.4%), whereas the highest percentage in the placebo group was found in the triptan-naive subgroup (9.7%). No serious AEs (SAEs) were reported in any subgroup.

The researchers concluded that “ubrogepant efficacy and tolerability did not differ for the acute treatment of migraine in participants classified as triptan responders, triptan-insufficient responders, and triptan naive based on their historical experience with triptans.”
 

Payers limit use

Despite the promising data, payer hurdles limit ubrogepant’s use, said Stewart Tepper, MD, who was asked to comment on the study. Dr. Tepper, a professor of neurology at the Geisel School of Medicine at Dartmouth, Hanover, N.H., was not involved in the study. “The study shows that ubrogepant will work as well as those who have not responded well to triptans, which is key,” Dr. Tepper said. “However, payers have set up step edits in which patients aren’t allowed to get ubrogepant unless they fail therapy with at least two triptans.”

Dr. Blumenfeld discounts the rationale behind requiring patients to try a second triptan after failing initial triptan therapy. “There are plenty of studies showing that if you fail one triptan, you’re likely to fail another,” he said. “Why would you put the patient on a different triptan when you could switch them to another drug with a different mechanism of action?”

The results showed that more patients in the ubrogepant 50-mg arm achieved pain freedom than those in the placebo arm within 2 hours after the initial dose in each group.

“Migraine is a very disabling condition, so you want to get the attack under control as quickly as possible while limiting the risk for potential side effects,” said Dr. Blumenfeld. “Ubrogepant is very efficacious and with very few adverse effects, but its use is limited because insurance companies require the failure of several triptans.”

One limitation of the study is that it is a subanalysis.

Dr. Blumenfeld has disclosed advisory board service, consulting, speaking, and authorship for AbbVie, Alder, Amgen, Biohaven, Lilly, Novartis, Teva, Theranica, and Zoscano.

On April 13, the Centers for Disease Control and Prevention and the Food and Drug Administration issued a joint statement recommending a pause in Johnson & Johnson vaccine administration, pending review of six reported U.S. cases of a rare and severe type of blood clot occurring after receiving the Johnson & Johnson vaccine. To date, more than 6.8 million doses of that vaccine have been given in the United States, so at this point the rate of detected cases of this problem is less than one in a million.

The six cases occurred in women aged 18-48 years, and symptoms occurred 6-13 days after vaccination. In these cases, cerebral venous sinus thrombosis was seen in addition to thrombocytopenia.

Physicians may receive calls from concerned patients who have received a COVID vaccine. However, more than 95% of the vaccine administrations in the United States to date have been the Pfizer and Moderna messenger RNA vaccines. No association between these vaccines and blood clots has been detected. Also, these six cases occurred within 2 weeks of Johnson & Johnson vaccination, so even among those receiving the Johnson & Johnson vaccine, those who are more than 3 weeks out from their vaccination have no need for concern regarding this rare complication.

Physicians should counsel those who have received the Johnson & Johnson vaccine less than 3 weeks ago to watch for easy bruising, gum bleeding, nose bleeds, leg or arm pain or swelling, severe headache or abdominal pain, shortness of breath, or chest pain. If they notice one or more of those symptoms, they should seek medical attention.

The Centers for Disease Control and Prevention will convene a meeting of the Advisory Committee on Immunization Practices on April 14 to review the six U.S. cases of the Johnson & Johnson vaccine and determine their significance.

Several cases of unusual thromboses and thrombocytopenia have been detected after the Oxford AstraZeneca vaccine, which uses the same adenovirus vector technology as the Johnson & Johnson vaccine, but which is not authorized for use in the United States. The Oxford AstraZeneca vaccine uses a recombinant deficient chimpanzee adenovirus to deliver the message to cells to produce antibody against the SARS-CoV-2 spike protein. The Johnson & Johnson vaccine uses a recombinant deficient human adenovirus to deliver this same message.  

Two recent reports in the New England Journal of Medicine have reported on thrombosis and thrombocytopenia after the Oxford AstraZeneca vaccine in Europe. Both of these reports identified high levels of IgG antibodies to platelet factor 4–polyanion complexes, similar to the mechanism of heparin-induced thrombocytopenia. The term vaccine-induced immune thrombocytopenia was proposed for this phenomenon. Treatment of this condition involves administration of intravenous immunoglobulin and nonheparin anticoagulants. Recent updates from the World Health Organization report that 169 cases of cerebral venous sinus thrombosis and 53 of splanchnic venous thrombosis occurred after 34 million doses of the Oxford AstraZeneca vaccine was administered in the European Union and United Kingdom.

While this pause in Johnson & Johnson vaccination is disappointing news amid increased cases in parts of the country, the Johnson & Johnson vaccines make up less than 5% of the U.S. vaccine doses administered to date. According to the CDC, more than 122 million Americans have received at least one dose and more than 75 million are fully vaccinated.

Dr. Patterson has received an honorarium from Pfizer for an antifungal symposium and is a subinvestigator for the Novavax vaccine. Her spouse served as a consultant for SCYNEXIS, as a speaker for Gilead Sciences and Basilea, and has received a research grant from the National Institutes of Health for the ACTT remdesivir trial.

A version of this article first appeared on Medscape.com.

On April 13, the Centers for Disease Control and Prevention and the Food and Drug Administration issued a joint statement recommending a pause in Johnson & Johnson vaccine administration, pending review of six reported U.S. cases of a rare and severe type of blood clot occurring after receiving the Johnson & Johnson vaccine. To date, more than 6.8 million doses of that vaccine have been given in the United States, so at this point the rate of detected cases of this problem is less than one in a million.

The six cases occurred in women aged 18-48 years, and symptoms occurred 6-13 days after vaccination. In these cases, cerebral venous sinus thrombosis was seen in addition to thrombocytopenia.

Physicians may receive calls from concerned patients who have received a COVID vaccine. However, more than 95% of the vaccine administrations in the United States to date have been the Pfizer and Moderna messenger RNA vaccines. No association between these vaccines and blood clots has been detected. Also, these six cases occurred within 2 weeks of Johnson & Johnson vaccination, so even among those receiving the Johnson & Johnson vaccine, those who are more than 3 weeks out from their vaccination have no need for concern regarding this rare complication.

Physicians should counsel those who have received the Johnson & Johnson vaccine less than 3 weeks ago to watch for easy bruising, gum bleeding, nose bleeds, leg or arm pain or swelling, severe headache or abdominal pain, shortness of breath, or chest pain. If they notice one or more of those symptoms, they should seek medical attention.

The Centers for Disease Control and Prevention will convene a meeting of the Advisory Committee on Immunization Practices on April 14 to review the six U.S. cases of the Johnson & Johnson vaccine and determine their significance.

Several cases of unusual thromboses and thrombocytopenia have been detected after the Oxford AstraZeneca vaccine, which uses the same adenovirus vector technology as the Johnson & Johnson vaccine, but which is not authorized for use in the United States. The Oxford AstraZeneca vaccine uses a recombinant deficient chimpanzee adenovirus to deliver the message to cells to produce antibody against the SARS-CoV-2 spike protein. The Johnson & Johnson vaccine uses a recombinant deficient human adenovirus to deliver this same message.  

Two recent reports in the New England Journal of Medicine have reported on thrombosis and thrombocytopenia after the Oxford AstraZeneca vaccine in Europe. Both of these reports identified high levels of IgG antibodies to platelet factor 4–polyanion complexes, similar to the mechanism of heparin-induced thrombocytopenia. The term vaccine-induced immune thrombocytopenia was proposed for this phenomenon. Treatment of this condition involves administration of intravenous immunoglobulin and nonheparin anticoagulants. Recent updates from the World Health Organization report that 169 cases of cerebral venous sinus thrombosis and 53 of splanchnic venous thrombosis occurred after 34 million doses of the Oxford AstraZeneca vaccine was administered in the European Union and United Kingdom.

While this pause in Johnson & Johnson vaccination is disappointing news amid increased cases in parts of the country, the Johnson & Johnson vaccines make up less than 5% of the U.S. vaccine doses administered to date. According to the CDC, more than 122 million Americans have received at least one dose and more than 75 million are fully vaccinated.

Dr. Patterson has received an honorarium from Pfizer for an antifungal symposium and is a subinvestigator for the Novavax vaccine. Her spouse served as a consultant for SCYNEXIS, as a speaker for Gilead Sciences and Basilea, and has received a research grant from the National Institutes of Health for the ACTT remdesivir trial.

A version of this article first appeared on Medscape.com.

On April 13, the Centers for Disease Control and Prevention and the Food and Drug Administration issued a joint statement recommending a pause in Johnson & Johnson vaccine administration, pending review of six reported U.S. cases of a rare and severe type of blood clot occurring after receiving the Johnson & Johnson vaccine. To date, more than 6.8 million doses of that vaccine have been given in the United States, so at this point the rate of detected cases of this problem is less than one in a million.

The six cases occurred in women aged 18-48 years, and symptoms occurred 6-13 days after vaccination. In these cases, cerebral venous sinus thrombosis was seen in addition to thrombocytopenia.

Physicians may receive calls from concerned patients who have received a COVID vaccine. However, more than 95% of the vaccine administrations in the United States to date have been the Pfizer and Moderna messenger RNA vaccines. No association between these vaccines and blood clots has been detected. Also, these six cases occurred within 2 weeks of Johnson & Johnson vaccination, so even among those receiving the Johnson & Johnson vaccine, those who are more than 3 weeks out from their vaccination have no need for concern regarding this rare complication.

Physicians should counsel those who have received the Johnson & Johnson vaccine less than 3 weeks ago to watch for easy bruising, gum bleeding, nose bleeds, leg or arm pain or swelling, severe headache or abdominal pain, shortness of breath, or chest pain. If they notice one or more of those symptoms, they should seek medical attention.

The Centers for Disease Control and Prevention will convene a meeting of the Advisory Committee on Immunization Practices on April 14 to review the six U.S. cases of the Johnson & Johnson vaccine and determine their significance.

Several cases of unusual thromboses and thrombocytopenia have been detected after the Oxford AstraZeneca vaccine, which uses the same adenovirus vector technology as the Johnson & Johnson vaccine, but which is not authorized for use in the United States. The Oxford AstraZeneca vaccine uses a recombinant deficient chimpanzee adenovirus to deliver the message to cells to produce antibody against the SARS-CoV-2 spike protein. The Johnson & Johnson vaccine uses a recombinant deficient human adenovirus to deliver this same message.  

Two recent reports in the New England Journal of Medicine have reported on thrombosis and thrombocytopenia after the Oxford AstraZeneca vaccine in Europe. Both of these reports identified high levels of IgG antibodies to platelet factor 4–polyanion complexes, similar to the mechanism of heparin-induced thrombocytopenia. The term vaccine-induced immune thrombocytopenia was proposed for this phenomenon. Treatment of this condition involves administration of intravenous immunoglobulin and nonheparin anticoagulants. Recent updates from the World Health Organization report that 169 cases of cerebral venous sinus thrombosis and 53 of splanchnic venous thrombosis occurred after 34 million doses of the Oxford AstraZeneca vaccine was administered in the European Union and United Kingdom.

While this pause in Johnson & Johnson vaccination is disappointing news amid increased cases in parts of the country, the Johnson & Johnson vaccines make up less than 5% of the U.S. vaccine doses administered to date. According to the CDC, more than 122 million Americans have received at least one dose and more than 75 million are fully vaccinated.

Dr. Patterson has received an honorarium from Pfizer for an antifungal symposium and is a subinvestigator for the Novavax vaccine. Her spouse served as a consultant for SCYNEXIS, as a speaker for Gilead Sciences and Basilea, and has received a research grant from the National Institutes of Health for the ACTT remdesivir trial.

A version of this article first appeared on Medscape.com.

Two recent articles in the medical literature provide new information on mucocutaneous manifestations of COVID-19 in children, which may help guide dermatologists in making accurate diagnoses and stratifying children at risk for serious, systemic illness due to the virus.

In a single-center descriptive study carried out over a 9-month period, researchers in Madrid found that of 50 hospitalized children infected with COVID-19, 21 (42%) had mucocutaneous symptoms, most commonly exanthem, followed by conjunctival hyperemia without secretion and red cracked lips or strawberry tongue. In addition, 18 (36%) fulfilled criteria for Multisystem Inflammatory Syndrome in Children (MIS-C).

“Based on findings in adult patients, the skin manifestations of COVID-19 have been classified under five categories: acral pseudo-chilblain, vesicular eruptions, urticarial lesions, maculopapular eruptions, and livedo or necrosis,” David Andina-Martinez, MD, of Hospital Infantil Universitario Niño Jesús, Madrid, and colleagues wrote in the study, which was published online on April 2 in the Journal of the American Academy of Dermatology.

“Chilblain lesions in healthy children and adolescents have received much attention; these lesions resolve without complications after a few weeks,” they added. “Besides, other cutaneous manifestations of COVID-19 in children have been the matter of case reports or small case series. Nevertheless, the mucocutaneous manifestations in hospitalized children infected with SARS-CoV-2 and their implications on the clinical course have not yet been extensively described.”

In an effort to describe the mucocutaneous manifestations in children hospitalized for COVID-19, the researchers evaluated 50 children up to 18 years of age who were admitted between March 1 and Nov. 30, 2020, to Hospital Infantil Universitario Niño Jesús, which was designated as a pediatric reference center during the peak of the pandemic. The main reasons for admission were respiratory illness (40%) and MIS-C (40%).

Of the 50 patients, 44 (88%) had a positive RT-PCR for SARS-CoV-2 and 6 (12%) met clinical suspicion criteria and had a negative RT-PCR with a positive IgG serology. In 34 patients (68%), a close contact with a suspected or confirmed case of COVID-19 was referred, while the source of the infection remained unknown in the remaining 16 patients (32%).

The researchers reported that 21 patients (42%) had mucocutaneous symptoms, most commonly maculopapular exanthem (86%), conjunctival hyperemia (81%), and red cracked lips or strawberry tongue (43%). In addition, 18 of the 21 patients (86%) fulfilled criteria for MIS-C.

“A tricky thing about MIS-C is that it often manifests 4-5 weeks after a child had COVID-19,” said Christine Ko, MD, professor of dermatology and pathology at Yale University, New Haven, Conn., who was asked to comment on the study. “MIS-C is associated with characteristic bright red lips and a red tongue that might resemble a strawberry. Such oral findings should prompt rapid evaluation for other signs and symptoms. There can be redness of the eyes or other more nonspecific skin findings (large or small areas of redness on the trunk or limbs, sometimes with surface change), but more importantly, fever, a rapid heartbeat, diarrhea, or breathing issues. The risk with MIS-C is a rapid decline in a child’s health, with admission to an intensive care unit.”

Dr. Andina-Martinez and his colleagues also contrast the skin findings of MIS-C, which are not generally on the hands or feet, with the so-called “COVID toe” or finger phenomenon, which has also been associated with SARS-CoV-2, particularly in children. “Only one of the patients in this series had skin involvement of a finger, and it only appeared after recovery from MIS-C,” Dr. Ko noted. “Distinguishing COVID toes from MIS-C is important, as COVID toes has a very good outcome, while MIS-C can have severe consequences, including protracted heart disease.”

In other findings, patients who presented with mucocutaneous signs tended to be older than those without skin signs and they presented at the emergency department with poor general status and extreme tachycardia. They also had higher C-reactive protein and D-dimer levels and lower lymphocyte counts and faced a more than a 10-fold increased risk of being admitted to the PICU, compared with patients who did not have skin signs (OR, 10.24; P = .003).

In a separate study published online on April 7 in JAMA Dermatology, Zachary E. Holcomb, MD, of the combined dermatology residency program at Massachusetts General Hospital, Boston, and colleagues presented what is believed to be the first case report of reactive infectious mucocutaneous eruption (RIME) triggered by SARS-CoV-2. RIME is the preferred term for pediatric patients who present with mucositis and rash (often a scant or even absent skin eruption) triggered by various infectious agents.

The patient, a 17-year-old male, presented to the emergency department with 3 days of mouth pain and nonpainful penile erosions. “One week prior, he experienced transient anosmia and ageusia that had since spontaneously resolved,” the researchers wrote. “At that time, he was tested for SARS-CoV-2 infection via nasopharyngeal polymerase chain reaction (PCR), the results of which were positive.”

At presentation, the patient had no fever, his vital signs were normal, and the physical exam revealed shallow erosions of the vermilion lips and hard palate, circumferential erythematous erosions of the periurethral glans penis, and five small vesicles on the trunk and upper extremities. Serum analysis revealed a normal white blood cell count with mild absolute lymphopenia, slightly elevated creatinine level, normal liver function, slightly elevated C-reactive protein level, and normal ferritin level.

Dr. Holcomb and colleagues made a diagnosis of SARS-CoV-2–associated RIME based on microbiological results, which revealed positive repeated SARS-CoV-2 nasopharyngeal PCR and negative nasopharyngeal PCR testing for Mycoplasma pneumoniae, adenovirus, Chlamydophila pneumoniae, human metapneumovirus, influenza A/B, parainfluenza 1 to 4, rhinovirus, and respiratory syncytial virus. In addition, titers of Mycoplasma pneumoniae IgM levels were negative, but Mycoplasma pneumoniae IgG levels were elevated.

The lesions resolved with 60 mg of oral prednisone taken daily for 4 days. A recurrence of oral mucositis 3 months later responded to 80 mg oral prednisone taken daily for 6 days.

“It’s not surprising that SARS-CoV-2 is yet another trigger for RIME,” said Anna Yasmine Kirkorian, MD, chief of the division of dermatology at Children’s National Hospital, Washington, who was asked to comment about the case report.

“The take-home message is for clinicians to be aware of this association and distinguish these patients from those with MIS-C, because patients with MIS-C require monitoring and urgent systemic treatment. RIME and MIS-C may potentially be distinguished clinically based on the nature of the mucositis (hemorrhagic and erosive in RIME, dry, cracked lips with ‘strawberry tongue’ in MIS-C) but more importantly patients with RIME lack laboratory evidence of severe systemic inflammation,” such as ESR, CRP, or ferritin, she said.

“A final interesting point in this article was the recurrence of mucositis in this patient, which could mean that recurrent mucositis/recurrent RIME might be yet another manifestation of ‘long-COVID’ (now called post-Acute Sequelae of SARS-CoV-2 infection) in some patients,” Dr. Kirkorian added. She noted that the American Academy of Dermatology–International League of Dermatologic Societies COVID-19 Dermatology Registry and articles like these “provide invaluable ‘hot off the presses’ information for clinicians who are facing the protean manifestations of a novel viral epidemic.”

The researchers reported having no financial disclosures.
 

[email protected]

Two recent articles in the medical literature provide new information on mucocutaneous manifestations of COVID-19 in children, which may help guide dermatologists in making accurate diagnoses and stratifying children at risk for serious, systemic illness due to the virus.

In a single-center descriptive study carried out over a 9-month period, researchers in Madrid found that of 50 hospitalized children infected with COVID-19, 21 (42%) had mucocutaneous symptoms, most commonly exanthem, followed by conjunctival hyperemia without secretion and red cracked lips or strawberry tongue. In addition, 18 (36%) fulfilled criteria for Multisystem Inflammatory Syndrome in Children (MIS-C).

“Based on findings in adult patients, the skin manifestations of COVID-19 have been classified under five categories: acral pseudo-chilblain, vesicular eruptions, urticarial lesions, maculopapular eruptions, and livedo or necrosis,” David Andina-Martinez, MD, of Hospital Infantil Universitario Niño Jesús, Madrid, and colleagues wrote in the study, which was published online on April 2 in the Journal of the American Academy of Dermatology.

“Chilblain lesions in healthy children and adolescents have received much attention; these lesions resolve without complications after a few weeks,” they added. “Besides, other cutaneous manifestations of COVID-19 in children have been the matter of case reports or small case series. Nevertheless, the mucocutaneous manifestations in hospitalized children infected with SARS-CoV-2 and their implications on the clinical course have not yet been extensively described.”

In an effort to describe the mucocutaneous manifestations in children hospitalized for COVID-19, the researchers evaluated 50 children up to 18 years of age who were admitted between March 1 and Nov. 30, 2020, to Hospital Infantil Universitario Niño Jesús, which was designated as a pediatric reference center during the peak of the pandemic. The main reasons for admission were respiratory illness (40%) and MIS-C (40%).

Of the 50 patients, 44 (88%) had a positive RT-PCR for SARS-CoV-2 and 6 (12%) met clinical suspicion criteria and had a negative RT-PCR with a positive IgG serology. In 34 patients (68%), a close contact with a suspected or confirmed case of COVID-19 was referred, while the source of the infection remained unknown in the remaining 16 patients (32%).

The researchers reported that 21 patients (42%) had mucocutaneous symptoms, most commonly maculopapular exanthem (86%), conjunctival hyperemia (81%), and red cracked lips or strawberry tongue (43%). In addition, 18 of the 21 patients (86%) fulfilled criteria for MIS-C.

“A tricky thing about MIS-C is that it often manifests 4-5 weeks after a child had COVID-19,” said Christine Ko, MD, professor of dermatology and pathology at Yale University, New Haven, Conn., who was asked to comment on the study. “MIS-C is associated with characteristic bright red lips and a red tongue that might resemble a strawberry. Such oral findings should prompt rapid evaluation for other signs and symptoms. There can be redness of the eyes or other more nonspecific skin findings (large or small areas of redness on the trunk or limbs, sometimes with surface change), but more importantly, fever, a rapid heartbeat, diarrhea, or breathing issues. The risk with MIS-C is a rapid decline in a child’s health, with admission to an intensive care unit.”

Dr. Andina-Martinez and his colleagues also contrast the skin findings of MIS-C, which are not generally on the hands or feet, with the so-called “COVID toe” or finger phenomenon, which has also been associated with SARS-CoV-2, particularly in children. “Only one of the patients in this series had skin involvement of a finger, and it only appeared after recovery from MIS-C,” Dr. Ko noted. “Distinguishing COVID toes from MIS-C is important, as COVID toes has a very good outcome, while MIS-C can have severe consequences, including protracted heart disease.”

In other findings, patients who presented with mucocutaneous signs tended to be older than those without skin signs and they presented at the emergency department with poor general status and extreme tachycardia. They also had higher C-reactive protein and D-dimer levels and lower lymphocyte counts and faced a more than a 10-fold increased risk of being admitted to the PICU, compared with patients who did not have skin signs (OR, 10.24; P = .003).

In a separate study published online on April 7 in JAMA Dermatology, Zachary E. Holcomb, MD, of the combined dermatology residency program at Massachusetts General Hospital, Boston, and colleagues presented what is believed to be the first case report of reactive infectious mucocutaneous eruption (RIME) triggered by SARS-CoV-2. RIME is the preferred term for pediatric patients who present with mucositis and rash (often a scant or even absent skin eruption) triggered by various infectious agents.

The patient, a 17-year-old male, presented to the emergency department with 3 days of mouth pain and nonpainful penile erosions. “One week prior, he experienced transient anosmia and ageusia that had since spontaneously resolved,” the researchers wrote. “At that time, he was tested for SARS-CoV-2 infection via nasopharyngeal polymerase chain reaction (PCR), the results of which were positive.”

At presentation, the patient had no fever, his vital signs were normal, and the physical exam revealed shallow erosions of the vermilion lips and hard palate, circumferential erythematous erosions of the periurethral glans penis, and five small vesicles on the trunk and upper extremities. Serum analysis revealed a normal white blood cell count with mild absolute lymphopenia, slightly elevated creatinine level, normal liver function, slightly elevated C-reactive protein level, and normal ferritin level.

Dr. Holcomb and colleagues made a diagnosis of SARS-CoV-2–associated RIME based on microbiological results, which revealed positive repeated SARS-CoV-2 nasopharyngeal PCR and negative nasopharyngeal PCR testing for Mycoplasma pneumoniae, adenovirus, Chlamydophila pneumoniae, human metapneumovirus, influenza A/B, parainfluenza 1 to 4, rhinovirus, and respiratory syncytial virus. In addition, titers of Mycoplasma pneumoniae IgM levels were negative, but Mycoplasma pneumoniae IgG levels were elevated.

The lesions resolved with 60 mg of oral prednisone taken daily for 4 days. A recurrence of oral mucositis 3 months later responded to 80 mg oral prednisone taken daily for 6 days.

“It’s not surprising that SARS-CoV-2 is yet another trigger for RIME,” said Anna Yasmine Kirkorian, MD, chief of the division of dermatology at Children’s National Hospital, Washington, who was asked to comment about the case report.

“The take-home message is for clinicians to be aware of this association and distinguish these patients from those with MIS-C, because patients with MIS-C require monitoring and urgent systemic treatment. RIME and MIS-C may potentially be distinguished clinically based on the nature of the mucositis (hemorrhagic and erosive in RIME, dry, cracked lips with ‘strawberry tongue’ in MIS-C) but more importantly patients with RIME lack laboratory evidence of severe systemic inflammation,” such as ESR, CRP, or ferritin, she said.

“A final interesting point in this article was the recurrence of mucositis in this patient, which could mean that recurrent mucositis/recurrent RIME might be yet another manifestation of ‘long-COVID’ (now called post-Acute Sequelae of SARS-CoV-2 infection) in some patients,” Dr. Kirkorian added. She noted that the American Academy of Dermatology–International League of Dermatologic Societies COVID-19 Dermatology Registry and articles like these “provide invaluable ‘hot off the presses’ information for clinicians who are facing the protean manifestations of a novel viral epidemic.”

The researchers reported having no financial disclosures.
 

[email protected]

Two recent articles in the medical literature provide new information on mucocutaneous manifestations of COVID-19 in children, which may help guide dermatologists in making accurate diagnoses and stratifying children at risk for serious, systemic illness due to the virus.

In a single-center descriptive study carried out over a 9-month period, researchers in Madrid found that of 50 hospitalized children infected with COVID-19, 21 (42%) had mucocutaneous symptoms, most commonly exanthem, followed by conjunctival hyperemia without secretion and red cracked lips or strawberry tongue. In addition, 18 (36%) fulfilled criteria for Multisystem Inflammatory Syndrome in Children (MIS-C).

“Based on findings in adult patients, the skin manifestations of COVID-19 have been classified under five categories: acral pseudo-chilblain, vesicular eruptions, urticarial lesions, maculopapular eruptions, and livedo or necrosis,” David Andina-Martinez, MD, of Hospital Infantil Universitario Niño Jesús, Madrid, and colleagues wrote in the study, which was published online on April 2 in the Journal of the American Academy of Dermatology.

“Chilblain lesions in healthy children and adolescents have received much attention; these lesions resolve without complications after a few weeks,” they added. “Besides, other cutaneous manifestations of COVID-19 in children have been the matter of case reports or small case series. Nevertheless, the mucocutaneous manifestations in hospitalized children infected with SARS-CoV-2 and their implications on the clinical course have not yet been extensively described.”

In an effort to describe the mucocutaneous manifestations in children hospitalized for COVID-19, the researchers evaluated 50 children up to 18 years of age who were admitted between March 1 and Nov. 30, 2020, to Hospital Infantil Universitario Niño Jesús, which was designated as a pediatric reference center during the peak of the pandemic. The main reasons for admission were respiratory illness (40%) and MIS-C (40%).

Of the 50 patients, 44 (88%) had a positive RT-PCR for SARS-CoV-2 and 6 (12%) met clinical suspicion criteria and had a negative RT-PCR with a positive IgG serology. In 34 patients (68%), a close contact with a suspected or confirmed case of COVID-19 was referred, while the source of the infection remained unknown in the remaining 16 patients (32%).

The researchers reported that 21 patients (42%) had mucocutaneous symptoms, most commonly maculopapular exanthem (86%), conjunctival hyperemia (81%), and red cracked lips or strawberry tongue (43%). In addition, 18 of the 21 patients (86%) fulfilled criteria for MIS-C.

“A tricky thing about MIS-C is that it often manifests 4-5 weeks after a child had COVID-19,” said Christine Ko, MD, professor of dermatology and pathology at Yale University, New Haven, Conn., who was asked to comment on the study. “MIS-C is associated with characteristic bright red lips and a red tongue that might resemble a strawberry. Such oral findings should prompt rapid evaluation for other signs and symptoms. There can be redness of the eyes or other more nonspecific skin findings (large or small areas of redness on the trunk or limbs, sometimes with surface change), but more importantly, fever, a rapid heartbeat, diarrhea, or breathing issues. The risk with MIS-C is a rapid decline in a child’s health, with admission to an intensive care unit.”

Dr. Andina-Martinez and his colleagues also contrast the skin findings of MIS-C, which are not generally on the hands or feet, with the so-called “COVID toe” or finger phenomenon, which has also been associated with SARS-CoV-2, particularly in children. “Only one of the patients in this series had skin involvement of a finger, and it only appeared after recovery from MIS-C,” Dr. Ko noted. “Distinguishing COVID toes from MIS-C is important, as COVID toes has a very good outcome, while MIS-C can have severe consequences, including protracted heart disease.”

In other findings, patients who presented with mucocutaneous signs tended to be older than those without skin signs and they presented at the emergency department with poor general status and extreme tachycardia. They also had higher C-reactive protein and D-dimer levels and lower lymphocyte counts and faced a more than a 10-fold increased risk of being admitted to the PICU, compared with patients who did not have skin signs (OR, 10.24; P = .003).

In a separate study published online on April 7 in JAMA Dermatology, Zachary E. Holcomb, MD, of the combined dermatology residency program at Massachusetts General Hospital, Boston, and colleagues presented what is believed to be the first case report of reactive infectious mucocutaneous eruption (RIME) triggered by SARS-CoV-2. RIME is the preferred term for pediatric patients who present with mucositis and rash (often a scant or even absent skin eruption) triggered by various infectious agents.

The patient, a 17-year-old male, presented to the emergency department with 3 days of mouth pain and nonpainful penile erosions. “One week prior, he experienced transient anosmia and ageusia that had since spontaneously resolved,” the researchers wrote. “At that time, he was tested for SARS-CoV-2 infection via nasopharyngeal polymerase chain reaction (PCR), the results of which were positive.”

At presentation, the patient had no fever, his vital signs were normal, and the physical exam revealed shallow erosions of the vermilion lips and hard palate, circumferential erythematous erosions of the periurethral glans penis, and five small vesicles on the trunk and upper extremities. Serum analysis revealed a normal white blood cell count with mild absolute lymphopenia, slightly elevated creatinine level, normal liver function, slightly elevated C-reactive protein level, and normal ferritin level.

Dr. Holcomb and colleagues made a diagnosis of SARS-CoV-2–associated RIME based on microbiological results, which revealed positive repeated SARS-CoV-2 nasopharyngeal PCR and negative nasopharyngeal PCR testing for Mycoplasma pneumoniae, adenovirus, Chlamydophila pneumoniae, human metapneumovirus, influenza A/B, parainfluenza 1 to 4, rhinovirus, and respiratory syncytial virus. In addition, titers of Mycoplasma pneumoniae IgM levels were negative, but Mycoplasma pneumoniae IgG levels were elevated.

The lesions resolved with 60 mg of oral prednisone taken daily for 4 days. A recurrence of oral mucositis 3 months later responded to 80 mg oral prednisone taken daily for 6 days.

“It’s not surprising that SARS-CoV-2 is yet another trigger for RIME,” said Anna Yasmine Kirkorian, MD, chief of the division of dermatology at Children’s National Hospital, Washington, who was asked to comment about the case report.

“The take-home message is for clinicians to be aware of this association and distinguish these patients from those with MIS-C, because patients with MIS-C require monitoring and urgent systemic treatment. RIME and MIS-C may potentially be distinguished clinically based on the nature of the mucositis (hemorrhagic and erosive in RIME, dry, cracked lips with ‘strawberry tongue’ in MIS-C) but more importantly patients with RIME lack laboratory evidence of severe systemic inflammation,” such as ESR, CRP, or ferritin, she said.

“A final interesting point in this article was the recurrence of mucositis in this patient, which could mean that recurrent mucositis/recurrent RIME might be yet another manifestation of ‘long-COVID’ (now called post-Acute Sequelae of SARS-CoV-2 infection) in some patients,” Dr. Kirkorian added. She noted that the American Academy of Dermatology–International League of Dermatologic Societies COVID-19 Dermatology Registry and articles like these “provide invaluable ‘hot off the presses’ information for clinicians who are facing the protean manifestations of a novel viral epidemic.”

The researchers reported having no financial disclosures.
 

[email protected]

It’s likely the United States will see another surge of COVID-19 this winter, warned Christopher Murray, MD, director of the Institute for Health Metrics and Evaluation (IHME) at the University of Washington in Seattle.

Speaking at the national conference of State of Reform on April 8, Dr. Murray cited the seasonality of the SARS-CoV-2 virus, which wanes in the summer and waxes in the winter. The “optimistic forecast” of IHME, which has modeled the course of the pandemic for the past 13 months, is that daily deaths will rise a bit in the next month, then decline from May through August, he said.

“Summer should be fairly quiet in terms of COVID, if vaccinations rise and people don’t stop wearing masks,” Dr. Murray said.

But he added that “a considerable surge will occur over next winter,” because the new variants are more transmissible, and people will likely relax social distancing and mask wearing. The IHME predicts that the percentage of Americans who usually don masks will decline from 73% today to 21% by Aug. 1.

With a rapid decline in mask use and a rise in mobility, there will still be more than 1,000 deaths each day by July 1, Dr. Murray said. In a forecast released the day after Dr. Murray spoke, the IHME predicted that by Aug. 1, there will be a total of 618,523 U.S. deaths from COVID-19. Deaths could be as high as 696,651 if mobility among the vaccinated returns to prepandemic levels, the institute forecasts.

Based on cell phone data, Dr. Murray said, the amount of mobility in the United States has already risen to the level of March 2020, when the pandemic was just getting underway.
 

Decreased infections

If there’s one piece of good news in the latest IHME report, it’s that the estimated number of people infected (including those not tested) will drop from 111,581 today to a projected 17,502 on Aug. 1. But in a worst-case scenario, with sharply higher mobility among vaccinated people, the case count on that date would only fall to 73,842.

The SARS-CoV-2 variants are another factor of concern. Dr. Murray distinguished between variants like the one first identified in the U.K. (B.1.1.7) and other “escape variants.”

B.1.1.7, which is now the dominant strain in the United States, increases transmission but doesn’t necessarily escape the immune system or vaccines, he explained.

In contrast, if someone is infected with a variant such as the South African or the Brazilian mutations, he said, a previous COVID-19 infection might not protect the person, and vaccines are less effective against those variants.

Cross-variant immunity may range from 0% to 60% for escape variants, based on the slim amount of data now available, Dr. Murray said. In his view, these variants will be the long-term driver of the pandemic in the United States, while the United Kingdom variant is the short-term driver.

The latest data, he said, show that the Pfizer/BioNTech and Moderna vaccines are 75% effective against the escape variants, with lower efficacy for other vaccines. But booster shots may still be required to protect people against some variants.
 

Human factors

Human behavior will also help determine the course of the pandemic, he noted. Vaccine hesitancy, for example, is still high in the United States.

By the end of May, he predicted, about 180 million people will have received about two doses of vaccine. After that, he said, “vaccination will flatline due to lack of demand.” The two unknowns are how much campaigns to promote vaccination will increase vaccine confidence, and when children will be vaccinated.

In the United States, he said, 69% of adults have been vaccinated or want to get a shot. But that percentage has dropped 5 points since February, and vaccine confidence varies by state.

Dr. Murray emphasized that the winter surge he predicts can be blocked if people change their behaviors. These include a rise in vaccine confidence to 80% and continued mask wearing by most people.

However, if vaccine confidence and mask wearing decline, state governments continue to drop social distancing rules, and the uptake of boosters is low, the winter surge could be more serious, he said.
 

Double surge

Murray also raised the possibility of a double surge of COVID-19 and influenza this winter. Widely expected last winter, this double surge never materialized here or elsewhere, partly because of mask wearing. But Dr. Murray said it could happen this year: History shows that the flu tends to be stronger in years after weak outbreaks.

He advised hospitals to prepare now for whatever might come later this year. Public health authorities, he said, should speed up vaccination, monitor variants closely with additional sequencing, and try to modify behavior in high-risk groups.

Asked to explain the recent surge of COVID-19 cases in Michigan, Dr. Murray attributed it partly to the spread of the B.1.1.7 (U.K.) variant. But he noted that the U.K. variant has expanded even more widely in some other states that haven’t had an explosive surge like Michigan’s.

Moreover, he noted, Michigan doesn’t have low mask use or high mobility. So the upward spiral of COVID-19 infections there is very concerning, he said.

In regard to the role of children as reservoirs of the virus, Dr. Murray pointed out that views on this have changed around the world. For a while, people thought kids didn’t spread COVID-19 very much. That view shifted when U.K. data showed that child transmission of the B.1.1.7 variant increased by half to 9% of contacts in comparison with the original virus strain.

Dutch data, similarly, showed schools contributing to the latest outbreaks, and some European nations have closed schools. In the United States, the trend is to open them.

A version of this article first appeared on Medscape.com.

It’s likely the United States will see another surge of COVID-19 this winter, warned Christopher Murray, MD, director of the Institute for Health Metrics and Evaluation (IHME) at the University of Washington in Seattle.

Speaking at the national conference of State of Reform on April 8, Dr. Murray cited the seasonality of the SARS-CoV-2 virus, which wanes in the summer and waxes in the winter. The “optimistic forecast” of IHME, which has modeled the course of the pandemic for the past 13 months, is that daily deaths will rise a bit in the next month, then decline from May through August, he said.

“Summer should be fairly quiet in terms of COVID, if vaccinations rise and people don’t stop wearing masks,” Dr. Murray said.

But he added that “a considerable surge will occur over next winter,” because the new variants are more transmissible, and people will likely relax social distancing and mask wearing. The IHME predicts that the percentage of Americans who usually don masks will decline from 73% today to 21% by Aug. 1.

With a rapid decline in mask use and a rise in mobility, there will still be more than 1,000 deaths each day by July 1, Dr. Murray said. In a forecast released the day after Dr. Murray spoke, the IHME predicted that by Aug. 1, there will be a total of 618,523 U.S. deaths from COVID-19. Deaths could be as high as 696,651 if mobility among the vaccinated returns to prepandemic levels, the institute forecasts.

Based on cell phone data, Dr. Murray said, the amount of mobility in the United States has already risen to the level of March 2020, when the pandemic was just getting underway.
 

Decreased infections

If there’s one piece of good news in the latest IHME report, it’s that the estimated number of people infected (including those not tested) will drop from 111,581 today to a projected 17,502 on Aug. 1. But in a worst-case scenario, with sharply higher mobility among vaccinated people, the case count on that date would only fall to 73,842.

The SARS-CoV-2 variants are another factor of concern. Dr. Murray distinguished between variants like the one first identified in the U.K. (B.1.1.7) and other “escape variants.”

B.1.1.7, which is now the dominant strain in the United States, increases transmission but doesn’t necessarily escape the immune system or vaccines, he explained.

In contrast, if someone is infected with a variant such as the South African or the Brazilian mutations, he said, a previous COVID-19 infection might not protect the person, and vaccines are less effective against those variants.

Cross-variant immunity may range from 0% to 60% for escape variants, based on the slim amount of data now available, Dr. Murray said. In his view, these variants will be the long-term driver of the pandemic in the United States, while the United Kingdom variant is the short-term driver.

The latest data, he said, show that the Pfizer/BioNTech and Moderna vaccines are 75% effective against the escape variants, with lower efficacy for other vaccines. But booster shots may still be required to protect people against some variants.
 

Human factors

Human behavior will also help determine the course of the pandemic, he noted. Vaccine hesitancy, for example, is still high in the United States.

By the end of May, he predicted, about 180 million people will have received about two doses of vaccine. After that, he said, “vaccination will flatline due to lack of demand.” The two unknowns are how much campaigns to promote vaccination will increase vaccine confidence, and when children will be vaccinated.

In the United States, he said, 69% of adults have been vaccinated or want to get a shot. But that percentage has dropped 5 points since February, and vaccine confidence varies by state.

Dr. Murray emphasized that the winter surge he predicts can be blocked if people change their behaviors. These include a rise in vaccine confidence to 80% and continued mask wearing by most people.

However, if vaccine confidence and mask wearing decline, state governments continue to drop social distancing rules, and the uptake of boosters is low, the winter surge could be more serious, he said.
 

Double surge

Murray also raised the possibility of a double surge of COVID-19 and influenza this winter. Widely expected last winter, this double surge never materialized here or elsewhere, partly because of mask wearing. But Dr. Murray said it could happen this year: History shows that the flu tends to be stronger in years after weak outbreaks.

He advised hospitals to prepare now for whatever might come later this year. Public health authorities, he said, should speed up vaccination, monitor variants closely with additional sequencing, and try to modify behavior in high-risk groups.

Asked to explain the recent surge of COVID-19 cases in Michigan, Dr. Murray attributed it partly to the spread of the B.1.1.7 (U.K.) variant. But he noted that the U.K. variant has expanded even more widely in some other states that haven’t had an explosive surge like Michigan’s.

Moreover, he noted, Michigan doesn’t have low mask use or high mobility. So the upward spiral of COVID-19 infections there is very concerning, he said.

In regard to the role of children as reservoirs of the virus, Dr. Murray pointed out that views on this have changed around the world. For a while, people thought kids didn’t spread COVID-19 very much. That view shifted when U.K. data showed that child transmission of the B.1.1.7 variant increased by half to 9% of contacts in comparison with the original virus strain.

Dutch data, similarly, showed schools contributing to the latest outbreaks, and some European nations have closed schools. In the United States, the trend is to open them.

A version of this article first appeared on Medscape.com.

It’s likely the United States will see another surge of COVID-19 this winter, warned Christopher Murray, MD, director of the Institute for Health Metrics and Evaluation (IHME) at the University of Washington in Seattle.

Speaking at the national conference of State of Reform on April 8, Dr. Murray cited the seasonality of the SARS-CoV-2 virus, which wanes in the summer and waxes in the winter. The “optimistic forecast” of IHME, which has modeled the course of the pandemic for the past 13 months, is that daily deaths will rise a bit in the next month, then decline from May through August, he said.

“Summer should be fairly quiet in terms of COVID, if vaccinations rise and people don’t stop wearing masks,” Dr. Murray said.

But he added that “a considerable surge will occur over next winter,” because the new variants are more transmissible, and people will likely relax social distancing and mask wearing. The IHME predicts that the percentage of Americans who usually don masks will decline from 73% today to 21% by Aug. 1.

With a rapid decline in mask use and a rise in mobility, there will still be more than 1,000 deaths each day by July 1, Dr. Murray said. In a forecast released the day after Dr. Murray spoke, the IHME predicted that by Aug. 1, there will be a total of 618,523 U.S. deaths from COVID-19. Deaths could be as high as 696,651 if mobility among the vaccinated returns to prepandemic levels, the institute forecasts.

Based on cell phone data, Dr. Murray said, the amount of mobility in the United States has already risen to the level of March 2020, when the pandemic was just getting underway.
 

Decreased infections

If there’s one piece of good news in the latest IHME report, it’s that the estimated number of people infected (including those not tested) will drop from 111,581 today to a projected 17,502 on Aug. 1. But in a worst-case scenario, with sharply higher mobility among vaccinated people, the case count on that date would only fall to 73,842.

The SARS-CoV-2 variants are another factor of concern. Dr. Murray distinguished between variants like the one first identified in the U.K. (B.1.1.7) and other “escape variants.”

B.1.1.7, which is now the dominant strain in the United States, increases transmission but doesn’t necessarily escape the immune system or vaccines, he explained.

In contrast, if someone is infected with a variant such as the South African or the Brazilian mutations, he said, a previous COVID-19 infection might not protect the person, and vaccines are less effective against those variants.

Cross-variant immunity may range from 0% to 60% for escape variants, based on the slim amount of data now available, Dr. Murray said. In his view, these variants will be the long-term driver of the pandemic in the United States, while the United Kingdom variant is the short-term driver.

The latest data, he said, show that the Pfizer/BioNTech and Moderna vaccines are 75% effective against the escape variants, with lower efficacy for other vaccines. But booster shots may still be required to protect people against some variants.
 

Human factors

Human behavior will also help determine the course of the pandemic, he noted. Vaccine hesitancy, for example, is still high in the United States.

By the end of May, he predicted, about 180 million people will have received about two doses of vaccine. After that, he said, “vaccination will flatline due to lack of demand.” The two unknowns are how much campaigns to promote vaccination will increase vaccine confidence, and when children will be vaccinated.

In the United States, he said, 69% of adults have been vaccinated or want to get a shot. But that percentage has dropped 5 points since February, and vaccine confidence varies by state.

Dr. Murray emphasized that the winter surge he predicts can be blocked if people change their behaviors. These include a rise in vaccine confidence to 80% and continued mask wearing by most people.

However, if vaccine confidence and mask wearing decline, state governments continue to drop social distancing rules, and the uptake of boosters is low, the winter surge could be more serious, he said.
 

Double surge

Murray also raised the possibility of a double surge of COVID-19 and influenza this winter. Widely expected last winter, this double surge never materialized here or elsewhere, partly because of mask wearing. But Dr. Murray said it could happen this year: History shows that the flu tends to be stronger in years after weak outbreaks.

He advised hospitals to prepare now for whatever might come later this year. Public health authorities, he said, should speed up vaccination, monitor variants closely with additional sequencing, and try to modify behavior in high-risk groups.

Asked to explain the recent surge of COVID-19 cases in Michigan, Dr. Murray attributed it partly to the spread of the B.1.1.7 (U.K.) variant. But he noted that the U.K. variant has expanded even more widely in some other states that haven’t had an explosive surge like Michigan’s.

Moreover, he noted, Michigan doesn’t have low mask use or high mobility. So the upward spiral of COVID-19 infections there is very concerning, he said.

In regard to the role of children as reservoirs of the virus, Dr. Murray pointed out that views on this have changed around the world. For a while, people thought kids didn’t spread COVID-19 very much. That view shifted when U.K. data showed that child transmission of the B.1.1.7 variant increased by half to 9% of contacts in comparison with the original virus strain.

Dutch data, similarly, showed schools contributing to the latest outbreaks, and some European nations have closed schools. In the United States, the trend is to open them.

A version of this article first appeared on Medscape.com.

Read the issue by clicking on the cover image or HERE

--

This 2021 issue is our seventh annual Rare Neurological Disease Special Report. It comes at a time when the global pandemic is still very much a part of our everyday lives. While the COVID-19 crisis is the polar opposite of a rare disease, it may offer some insights into the rare disease community. Collectively, we faced a disease no one knew much about—an untreatable condition that sent us into isolation, changed our world view, and altered our daily lives in ways we never imagined. We experienced, many of us for the first time, the fear and helplessness of a medical situation that was potentially fatal. Isn’t that what patients with rare diseases and their families face every day? Fear of the unknown; the desperate search for answers; isolation from a world and, all too often, a medical community that does not understand your situation; the terror of suspecting that time may not be on your side, and the valiant effort to press on despite desperate odds—these are things the rare disease community know all too well.

In publishing the Rare Neurological Disease Special Report, our goal has always been to educate the medical community on conditions they may rarely see and offer some hope to those who battle a rare neurological disease. I hope you enjoy reading our seventh annual issue.

Read the issue by clicking on the cover image or HERE

--

This 2021 issue is our seventh annual Rare Neurological Disease Special Report. It comes at a time when the global pandemic is still very much a part of our everyday lives. While the COVID-19 crisis is the polar opposite of a rare disease, it may offer some insights into the rare disease community. Collectively, we faced a disease no one knew much about—an untreatable condition that sent us into isolation, changed our world view, and altered our daily lives in ways we never imagined. We experienced, many of us for the first time, the fear and helplessness of a medical situation that was potentially fatal. Isn’t that what patients with rare diseases and their families face every day? Fear of the unknown; the desperate search for answers; isolation from a world and, all too often, a medical community that does not understand your situation; the terror of suspecting that time may not be on your side, and the valiant effort to press on despite desperate odds—these are things the rare disease community know all too well.

In publishing the Rare Neurological Disease Special Report, our goal has always been to educate the medical community on conditions they may rarely see and offer some hope to those who battle a rare neurological disease. I hope you enjoy reading our seventh annual issue.

Read the issue by clicking on the cover image or HERE

--

This 2021 issue is our seventh annual Rare Neurological Disease Special Report. It comes at a time when the global pandemic is still very much a part of our everyday lives. While the COVID-19 crisis is the polar opposite of a rare disease, it may offer some insights into the rare disease community. Collectively, we faced a disease no one knew much about—an untreatable condition that sent us into isolation, changed our world view, and altered our daily lives in ways we never imagined. We experienced, many of us for the first time, the fear and helplessness of a medical situation that was potentially fatal. Isn’t that what patients with rare diseases and their families face every day? Fear of the unknown; the desperate search for answers; isolation from a world and, all too often, a medical community that does not understand your situation; the terror of suspecting that time may not be on your side, and the valiant effort to press on despite desperate odds—these are things the rare disease community know all too well.

In publishing the Rare Neurological Disease Special Report, our goal has always been to educate the medical community on conditions they may rarely see and offer some hope to those who battle a rare neurological disease. I hope you enjoy reading our seventh annual issue.

Recently my wife had surgery to remove some old hardware from her knee.

Although it was an outpatient procedure, it was done at the main hospital. I was told it would be about 5 hours total, so I set up shop in the waiting room with my laptop to get some work done.

There were a few other people waiting there and one volunteer at the desk. The whole time went fairly uneventfully. Others busied themselves with iPads, phones, books, etc. It was, overall, a pleasantly quiet atmosphere. There were the occasional hushed tones of someone on the phone or talking to a doctor, the sound of someone crying in the private discussion room, the voice of a volunteer answering questions, and the intermittent whirring of the Keurig machine.

I sat there and thought about how different it was from times in the past. On weekends when I’d take call I’d come through this same room. It was often packed – standing room only. Almost always there were children running amok because their parents were too distracted or tired to control them. There were food wrappers and dirty cafeteria trays sitting on tables. The Keurig machine was often empty from frequent use – the volunteer too overwhelmed to resupply it.

Now, in the COVID-19 era, it’s a whole different world with visitor restrictions, and I found myself wondering: “Why go back to that?”

Seriously. Isn’t a calm, quiet, atmosphere supposed to be what a hospital (or doctor’s) waiting room should be? Is it really critical that large numbers of an extended family be in the waiting room for every case?

Granted, there should be exceptions. Critical and terminal illness, withdrawal of care, maybe a few others. But for the majority of patients, placing limitations on the numbers of family members in the waiting room shouldn’t be an issue; it makes the difficult environment of being there easier for all to deal with.

Limiting it to one, maybe two family members for most circumstances isn’t a bad idea. A hospital isn’t an airport, and shouldn’t be run the same way.

Dr. Block has a solo neurology practice in Scottsdale, Ariz.

Recently my wife had surgery to remove some old hardware from her knee.

Although it was an outpatient procedure, it was done at the main hospital. I was told it would be about 5 hours total, so I set up shop in the waiting room with my laptop to get some work done.

There were a few other people waiting there and one volunteer at the desk. The whole time went fairly uneventfully. Others busied themselves with iPads, phones, books, etc. It was, overall, a pleasantly quiet atmosphere. There were the occasional hushed tones of someone on the phone or talking to a doctor, the sound of someone crying in the private discussion room, the voice of a volunteer answering questions, and the intermittent whirring of the Keurig machine.

I sat there and thought about how different it was from times in the past. On weekends when I’d take call I’d come through this same room. It was often packed – standing room only. Almost always there were children running amok because their parents were too distracted or tired to control them. There were food wrappers and dirty cafeteria trays sitting on tables. The Keurig machine was often empty from frequent use – the volunteer too overwhelmed to resupply it.

Now, in the COVID-19 era, it’s a whole different world with visitor restrictions, and I found myself wondering: “Why go back to that?”

Seriously. Isn’t a calm, quiet, atmosphere supposed to be what a hospital (or doctor’s) waiting room should be? Is it really critical that large numbers of an extended family be in the waiting room for every case?

Granted, there should be exceptions. Critical and terminal illness, withdrawal of care, maybe a few others. But for the majority of patients, placing limitations on the numbers of family members in the waiting room shouldn’t be an issue; it makes the difficult environment of being there easier for all to deal with.

Limiting it to one, maybe two family members for most circumstances isn’t a bad idea. A hospital isn’t an airport, and shouldn’t be run the same way.

Dr. Block has a solo neurology practice in Scottsdale, Ariz.

Recently my wife had surgery to remove some old hardware from her knee.

Although it was an outpatient procedure, it was done at the main hospital. I was told it would be about 5 hours total, so I set up shop in the waiting room with my laptop to get some work done.

There were a few other people waiting there and one volunteer at the desk. The whole time went fairly uneventfully. Others busied themselves with iPads, phones, books, etc. It was, overall, a pleasantly quiet atmosphere. There were the occasional hushed tones of someone on the phone or talking to a doctor, the sound of someone crying in the private discussion room, the voice of a volunteer answering questions, and the intermittent whirring of the Keurig machine.

I sat there and thought about how different it was from times in the past. On weekends when I’d take call I’d come through this same room. It was often packed – standing room only. Almost always there were children running amok because their parents were too distracted or tired to control them. There were food wrappers and dirty cafeteria trays sitting on tables. The Keurig machine was often empty from frequent use – the volunteer too overwhelmed to resupply it.

Now, in the COVID-19 era, it’s a whole different world with visitor restrictions, and I found myself wondering: “Why go back to that?”

Seriously. Isn’t a calm, quiet, atmosphere supposed to be what a hospital (or doctor’s) waiting room should be? Is it really critical that large numbers of an extended family be in the waiting room for every case?

Granted, there should be exceptions. Critical and terminal illness, withdrawal of care, maybe a few others. But for the majority of patients, placing limitations on the numbers of family members in the waiting room shouldn’t be an issue; it makes the difficult environment of being there easier for all to deal with.

Limiting it to one, maybe two family members for most circumstances isn’t a bad idea. A hospital isn’t an airport, and shouldn’t be run the same way.

Dr. Block has a solo neurology practice in Scottsdale, Ariz.

A version of this article first appeared on WebMD.com.

This article was updated 4/13/21.

A version of this article first appeared on WebMD.com.

This article was updated 4/13/21.

A version of this article first appeared on WebMD.com.

This article was updated 4/13/21.

A new antiplatelet drug with a completely novel mechanism of action may hold the promise of delivering the holy grail – reducing cardiac events without increasing bleeding. That is the hope behind the new class of drugs directed against the platelet collagen glycoprotein VI (GPVI) receptor.

A phase 2 trial with the first agent in this class, known as revacept (advanceCOR), showed no increase in bleeding with the product when added to standard dual-antiplatelet therapy for patients with stable ischemic heart disease undergoing elective percutaneous coronary intervention (PCI), despite the drug’s being used at a dose that has been shown to increase platelet inhibition.

Unfortunately, there was no reduction in the primary clinical efficacy endpoint, a myocardial injury surrogate, but the authors pointed out that the overall event rate was low, and they were hopeful that future trials in a higher-risk population will show efficacy.

The ISAR PLASTER study was published online on March 31 in JAMA Cardiology.

“This new drug is targeting the collagen in the extracellular matrix of atherosclerotic plaque rather than the platelets themselves. So, in theory, this agent should not cause an increase in bleeding,” study author Steffen Massberg, DrMed, said in an interview.

Dr. Massberg explained that revacept targets the binding site for platelets on collagen that is exposed on rupture of atherosclerotic plaques and is a major trigger of platelet activation.

“In contrast to aspirin and P2Y12 inhibitors, which target all platelets, revacept only binds to sites where there is ruptured plaque. But the platelets themselves otherwise have normal function, so regular coagulation processes should be unaffected,” he commented.

“While collagen also has a role in the coagulation process, it is more involved in atherosclerotic plaque rupture, and in animal studies, revacept was effective in preventing clot formation in large arteries but only had a small effect on bleeding,” Dr. Massberg added.

In the JAMA Cardiology article, the authors further elaborated that, when collagen is exposed during atherosclerotic plaque rupture, it binds platelet GPVI, the major platelet collagen receptor.

“Glycoprotein VI in turn mediates local platelet recruitment, activation, and aggregation. Glycoprotein VI is an attractive antiplatelet target because GPVI-mediated platelet response plays a central role during myocardial infarction and stroke but is less relevant in physiological hemostasis,” they wrote.

The researchers describe revacept as a dimeric, soluble fusion protein composed of the extracellular domain of the GPVI receptor and the human Fc-fragment. It competes with endogenous platelet GPVI for binding to exposed collagen fibers and inhibits collagen-mediated platelet adhesion and aggregation selectively at the site of plaque rupture.

In addition, revacept blocks binding of von Willebrand factor to collagen and inhibits von Willebrand factor–mediated platelet activation, they reported.

“As a lesion-directed drug, revacept does not interfere with the function of circulating platelets beyond the atherosclerotic lesion,” the authors said.

In animal studies and a phase 1 clinical trial, the drug was shown to inhibit atherothrombosis but to have little effect on systemic hemostasis or bleeding.

The current ISAR-PLASTER trial is the first study of the use of the agent for patients with coronary heart disease.

For the study, 334 patients with stable ischemic heart disease undergoing elective PCI were randomly assigned to receive a single intravenous infusion of revacept 160 mg, revacept 80 mg, or placebo prior to the start of PCI in addition to standard antithrombotic therapy.

The safety endpoint was bleeding of type 2-5, per Bleeding Academic Research Consortium (BARC) criteria, at 30 days.

Results showed no significant differences in the primary efficacy endpoint (the composite of death or myocardial injury, defined as an increase in high-sensitivity cardiac troponin T [hsTnT] to at least five times the upper limit of normal within 48 hours from randomization) between the revacept and placebo groups. The primary efficacy endpoint occurred in 24.4% of the revacept 160-mg group, 25.0% of the revacept 80-mg group, and 23.3% of the placebo group.

The high dose of revacept was associated with a small but significant reduction of high-concentration collagen-induced platelet aggregation, but adenosine 5-diphosphate–induced aggregation was not affected.

Revacept did not increase bleeding. Bleeding of BARC type 2 or higher at 30 days occurred in 5.0% of the 160-mg group, 5.9% of the 80-mg group, and 8.6% of the placebo group.

Dr. Massberg pointed out that one possible explanation for the lack of difference in the efficacy outcome was that the patients enrolled in the study were at low risk.

“The rate of major adverse cardiovascular events was very low (2.5% at 30 days), and this was a low-risk population undergoing elective PCI,” he commented.

The authors also pointed out that the five-times increase in hsTnT endpoint used in the current study has little prognostic impact.

In addition, Dr. Massberg noted that, in the stable situation, myocardial injury is mostly triggered by cholesterol embolism during PCI and side-branch occlusion due to distal plaque embolization, problems that are unlikely to respond to inhibition of GPVI-collagen interaction by revacept.

He suggested that better results may be achieved in patients with acute coronary syndrome (ACS). “In ACS patients, the myocardial injury is caused by ongoing thrombotic cascades, where the collagen-platelet interaction plays a much larger role, so in theory, this drug should show a greater effect in an ACS population.”

The researchers are now planning a larger phase 3 study in that group.

“I am still optimistic. I still believe it could work,” Dr. Massberg said. “The major aim for this study was safety and dosing. There was no difference in bleeding, so safety was supported,” he added.

The ISAR-PLASTER study was funded by the German Center for Cardiovascular Research, Deutsches Herzzentrum Munchen, the Federal Ministry of Education and Research, and advanceCOR (the manufacturer of revacept). One of the coauthors of the study is a cofounder of advanceCor.

A version of this article first appeared on Medscape.com.

A new antiplatelet drug with a completely novel mechanism of action may hold the promise of delivering the holy grail – reducing cardiac events without increasing bleeding. That is the hope behind the new class of drugs directed against the platelet collagen glycoprotein VI (GPVI) receptor.

A phase 2 trial with the first agent in this class, known as revacept (advanceCOR), showed no increase in bleeding with the product when added to standard dual-antiplatelet therapy for patients with stable ischemic heart disease undergoing elective percutaneous coronary intervention (PCI), despite the drug’s being used at a dose that has been shown to increase platelet inhibition.

Unfortunately, there was no reduction in the primary clinical efficacy endpoint, a myocardial injury surrogate, but the authors pointed out that the overall event rate was low, and they were hopeful that future trials in a higher-risk population will show efficacy.

The ISAR PLASTER study was published online on March 31 in JAMA Cardiology.

“This new drug is targeting the collagen in the extracellular matrix of atherosclerotic plaque rather than the platelets themselves. So, in theory, this agent should not cause an increase in bleeding,” study author Steffen Massberg, DrMed, said in an interview.

Dr. Massberg explained that revacept targets the binding site for platelets on collagen that is exposed on rupture of atherosclerotic plaques and is a major trigger of platelet activation.

“In contrast to aspirin and P2Y12 inhibitors, which target all platelets, revacept only binds to sites where there is ruptured plaque. But the platelets themselves otherwise have normal function, so regular coagulation processes should be unaffected,” he commented.

“While collagen also has a role in the coagulation process, it is more involved in atherosclerotic plaque rupture, and in animal studies, revacept was effective in preventing clot formation in large arteries but only had a small effect on bleeding,” Dr. Massberg added.

In the JAMA Cardiology article, the authors further elaborated that, when collagen is exposed during atherosclerotic plaque rupture, it binds platelet GPVI, the major platelet collagen receptor.

“Glycoprotein VI in turn mediates local platelet recruitment, activation, and aggregation. Glycoprotein VI is an attractive antiplatelet target because GPVI-mediated platelet response plays a central role during myocardial infarction and stroke but is less relevant in physiological hemostasis,” they wrote.

The researchers describe revacept as a dimeric, soluble fusion protein composed of the extracellular domain of the GPVI receptor and the human Fc-fragment. It competes with endogenous platelet GPVI for binding to exposed collagen fibers and inhibits collagen-mediated platelet adhesion and aggregation selectively at the site of plaque rupture.

In addition, revacept blocks binding of von Willebrand factor to collagen and inhibits von Willebrand factor–mediated platelet activation, they reported.

“As a lesion-directed drug, revacept does not interfere with the function of circulating platelets beyond the atherosclerotic lesion,” the authors said.

In animal studies and a phase 1 clinical trial, the drug was shown to inhibit atherothrombosis but to have little effect on systemic hemostasis or bleeding.

The current ISAR-PLASTER trial is the first study of the use of the agent for patients with coronary heart disease.

For the study, 334 patients with stable ischemic heart disease undergoing elective PCI were randomly assigned to receive a single intravenous infusion of revacept 160 mg, revacept 80 mg, or placebo prior to the start of PCI in addition to standard antithrombotic therapy.

The safety endpoint was bleeding of type 2-5, per Bleeding Academic Research Consortium (BARC) criteria, at 30 days.

Results showed no significant differences in the primary efficacy endpoint (the composite of death or myocardial injury, defined as an increase in high-sensitivity cardiac troponin T [hsTnT] to at least five times the upper limit of normal within 48 hours from randomization) between the revacept and placebo groups. The primary efficacy endpoint occurred in 24.4% of the revacept 160-mg group, 25.0% of the revacept 80-mg group, and 23.3% of the placebo group.

The high dose of revacept was associated with a small but significant reduction of high-concentration collagen-induced platelet aggregation, but adenosine 5-diphosphate–induced aggregation was not affected.

Revacept did not increase bleeding. Bleeding of BARC type 2 or higher at 30 days occurred in 5.0% of the 160-mg group, 5.9% of the 80-mg group, and 8.6% of the placebo group.

Dr. Massberg pointed out that one possible explanation for the lack of difference in the efficacy outcome was that the patients enrolled in the study were at low risk.

“The rate of major adverse cardiovascular events was very low (2.5% at 30 days), and this was a low-risk population undergoing elective PCI,” he commented.

The authors also pointed out that the five-times increase in hsTnT endpoint used in the current study has little prognostic impact.

In addition, Dr. Massberg noted that, in the stable situation, myocardial injury is mostly triggered by cholesterol embolism during PCI and side-branch occlusion due to distal plaque embolization, problems that are unlikely to respond to inhibition of GPVI-collagen interaction by revacept.

He suggested that better results may be achieved in patients with acute coronary syndrome (ACS). “In ACS patients, the myocardial injury is caused by ongoing thrombotic cascades, where the collagen-platelet interaction plays a much larger role, so in theory, this drug should show a greater effect in an ACS population.”

The researchers are now planning a larger phase 3 study in that group.

“I am still optimistic. I still believe it could work,” Dr. Massberg said. “The major aim for this study was safety and dosing. There was no difference in bleeding, so safety was supported,” he added.

The ISAR-PLASTER study was funded by the German Center for Cardiovascular Research, Deutsches Herzzentrum Munchen, the Federal Ministry of Education and Research, and advanceCOR (the manufacturer of revacept). One of the coauthors of the study is a cofounder of advanceCor.

A version of this article first appeared on Medscape.com.

A new antiplatelet drug with a completely novel mechanism of action may hold the promise of delivering the holy grail – reducing cardiac events without increasing bleeding. That is the hope behind the new class of drugs directed against the platelet collagen glycoprotein VI (GPVI) receptor.

A phase 2 trial with the first agent in this class, known as revacept (advanceCOR), showed no increase in bleeding with the product when added to standard dual-antiplatelet therapy for patients with stable ischemic heart disease undergoing elective percutaneous coronary intervention (PCI), despite the drug’s being used at a dose that has been shown to increase platelet inhibition.

Unfortunately, there was no reduction in the primary clinical efficacy endpoint, a myocardial injury surrogate, but the authors pointed out that the overall event rate was low, and they were hopeful that future trials in a higher-risk population will show efficacy.

The ISAR PLASTER study was published online on March 31 in JAMA Cardiology.

“This new drug is targeting the collagen in the extracellular matrix of atherosclerotic plaque rather than the platelets themselves. So, in theory, this agent should not cause an increase in bleeding,” study author Steffen Massberg, DrMed, said in an interview.

Dr. Massberg explained that revacept targets the binding site for platelets on collagen that is exposed on rupture of atherosclerotic plaques and is a major trigger of platelet activation.

“In contrast to aspirin and P2Y12 inhibitors, which target all platelets, revacept only binds to sites where there is ruptured plaque. But the platelets themselves otherwise have normal function, so regular coagulation processes should be unaffected,” he commented.

“While collagen also has a role in the coagulation process, it is more involved in atherosclerotic plaque rupture, and in animal studies, revacept was effective in preventing clot formation in large arteries but only had a small effect on bleeding,” Dr. Massberg added.

In the JAMA Cardiology article, the authors further elaborated that, when collagen is exposed during atherosclerotic plaque rupture, it binds platelet GPVI, the major platelet collagen receptor.

“Glycoprotein VI in turn mediates local platelet recruitment, activation, and aggregation. Glycoprotein VI is an attractive antiplatelet target because GPVI-mediated platelet response plays a central role during myocardial infarction and stroke but is less relevant in physiological hemostasis,” they wrote.

The researchers describe revacept as a dimeric, soluble fusion protein composed of the extracellular domain of the GPVI receptor and the human Fc-fragment. It competes with endogenous platelet GPVI for binding to exposed collagen fibers and inhibits collagen-mediated platelet adhesion and aggregation selectively at the site of plaque rupture.

In addition, revacept blocks binding of von Willebrand factor to collagen and inhibits von Willebrand factor–mediated platelet activation, they reported.

“As a lesion-directed drug, revacept does not interfere with the function of circulating platelets beyond the atherosclerotic lesion,” the authors said.

In animal studies and a phase 1 clinical trial, the drug was shown to inhibit atherothrombosis but to have little effect on systemic hemostasis or bleeding.

The current ISAR-PLASTER trial is the first study of the use of the agent for patients with coronary heart disease.

For the study, 334 patients with stable ischemic heart disease undergoing elective PCI were randomly assigned to receive a single intravenous infusion of revacept 160 mg, revacept 80 mg, or placebo prior to the start of PCI in addition to standard antithrombotic therapy.

The safety endpoint was bleeding of type 2-5, per Bleeding Academic Research Consortium (BARC) criteria, at 30 days.

Results showed no significant differences in the primary efficacy endpoint (the composite of death or myocardial injury, defined as an increase in high-sensitivity cardiac troponin T [hsTnT] to at least five times the upper limit of normal within 48 hours from randomization) between the revacept and placebo groups. The primary efficacy endpoint occurred in 24.4% of the revacept 160-mg group, 25.0% of the revacept 80-mg group, and 23.3% of the placebo group.

The high dose of revacept was associated with a small but significant reduction of high-concentration collagen-induced platelet aggregation, but adenosine 5-diphosphate–induced aggregation was not affected.

Revacept did not increase bleeding. Bleeding of BARC type 2 or higher at 30 days occurred in 5.0% of the 160-mg group, 5.9% of the 80-mg group, and 8.6% of the placebo group.

Dr. Massberg pointed out that one possible explanation for the lack of difference in the efficacy outcome was that the patients enrolled in the study were at low risk.

“The rate of major adverse cardiovascular events was very low (2.5% at 30 days), and this was a low-risk population undergoing elective PCI,” he commented.

The authors also pointed out that the five-times increase in hsTnT endpoint used in the current study has little prognostic impact.

In addition, Dr. Massberg noted that, in the stable situation, myocardial injury is mostly triggered by cholesterol embolism during PCI and side-branch occlusion due to distal plaque embolization, problems that are unlikely to respond to inhibition of GPVI-collagen interaction by revacept.

He suggested that better results may be achieved in patients with acute coronary syndrome (ACS). “In ACS patients, the myocardial injury is caused by ongoing thrombotic cascades, where the collagen-platelet interaction plays a much larger role, so in theory, this drug should show a greater effect in an ACS population.”

The researchers are now planning a larger phase 3 study in that group.

“I am still optimistic. I still believe it could work,” Dr. Massberg said. “The major aim for this study was safety and dosing. There was no difference in bleeding, so safety was supported,” he added.

The ISAR-PLASTER study was funded by the German Center for Cardiovascular Research, Deutsches Herzzentrum Munchen, the Federal Ministry of Education and Research, and advanceCOR (the manufacturer of revacept). One of the coauthors of the study is a cofounder of advanceCor.

A version of this article first appeared on Medscape.com.