Key clinical point: Poor sleep and higher stress level is associated with a higher rate of headache recurrence over next 6 weeks in patients with episodic migraine.

Major finding: Poor sleep quality was associated with a 22% higher rate of headache recurrence (adjusted hazard ratio [aHR], 1.22; 95% confidence interval [95% CI], 1.02-1.46), and the combination of poor sleep and moderate/high stress vs. good sleep and low stress was associated with a 31% higher rate of headache recurrence (aHR, 1.31; 95% CI, 1.05-1.65).

Study details: Findings are from a priori secondary analysis of a prospective cohort study of 98 patients with episodic migraine.

Disclosures: The work was funded by the National Institute of Neurological Disorders and Stroke, the American Sleep Medicine Foundation, the Harvard Clinical and Translational Science Center, and Harvard University and its affiliated academic health care centers. Dr. SM Bertisch reported receiving research support from and serving as a consultant for various sources. All other authors declared no financial conflicts of interest.

Source: Vgontzas A et al. Headache. 2021 Mar 22. doi: 10.1111/head.14105.

Key clinical point: Poor sleep and higher stress level is associated with a higher rate of headache recurrence over next 6 weeks in patients with episodic migraine.

Major finding: Poor sleep quality was associated with a 22% higher rate of headache recurrence (adjusted hazard ratio [aHR], 1.22; 95% confidence interval [95% CI], 1.02-1.46), and the combination of poor sleep and moderate/high stress vs. good sleep and low stress was associated with a 31% higher rate of headache recurrence (aHR, 1.31; 95% CI, 1.05-1.65).

Study details: Findings are from a priori secondary analysis of a prospective cohort study of 98 patients with episodic migraine.

Disclosures: The work was funded by the National Institute of Neurological Disorders and Stroke, the American Sleep Medicine Foundation, the Harvard Clinical and Translational Science Center, and Harvard University and its affiliated academic health care centers. Dr. SM Bertisch reported receiving research support from and serving as a consultant for various sources. All other authors declared no financial conflicts of interest.

Source: Vgontzas A et al. Headache. 2021 Mar 22. doi: 10.1111/head.14105.

Key clinical point: Poor sleep and higher stress level is associated with a higher rate of headache recurrence over next 6 weeks in patients with episodic migraine.

Major finding: Poor sleep quality was associated with a 22% higher rate of headache recurrence (adjusted hazard ratio [aHR], 1.22; 95% confidence interval [95% CI], 1.02-1.46), and the combination of poor sleep and moderate/high stress vs. good sleep and low stress was associated with a 31% higher rate of headache recurrence (aHR, 1.31; 95% CI, 1.05-1.65).

Study details: Findings are from a priori secondary analysis of a prospective cohort study of 98 patients with episodic migraine.

Disclosures: The work was funded by the National Institute of Neurological Disorders and Stroke, the American Sleep Medicine Foundation, the Harvard Clinical and Translational Science Center, and Harvard University and its affiliated academic health care centers. Dr. SM Bertisch reported receiving research support from and serving as a consultant for various sources. All other authors declared no financial conflicts of interest.

Source: Vgontzas A et al. Headache. 2021 Mar 22. doi: 10.1111/head.14105.

Key clinical point: DFN-15- an oral, ready-made liquid solution of a selective cyclo-oxygenase-2 inhibitor celecoxib, was superior to placebo for acute treatment of a migraine attack of any pain intensity, along with a favorable safety and tolerability profile.

Major finding: Percentage of patients with freedom from pain (46.2% vs. 31.1%; P less than.001) and freedom from the most bothersome symptom (63.4% vs. 50.0%; P = .010) at 2 hours after dose was significantly higher for DFN-15 vs. placebo. No serious treatment-emergent adverse events or those leading to study drug termination were reported.

Study details: Data come from the second phase of a 2-phase, double-blind, multicenter trial, which re-randomized 535 patients with migraine to placebo or DFN-15 group.

Disclosures: This study was supported and funded by Dr. Reddy’s Laboratories group of companies, Princeton, NJ 08540, USA. The authors declared receiving funding, honoraria, and consulting from various sources. S Munjal reported being an employee and owning stocks and C Iaconangelo declared being a paid consultant of Dr. Reddy’s Laboratories.

Source: Lipton RB et al. J Pain Res. 2021 Feb 25. doi: 10.2147/JPR.S287571.

Key clinical point: DFN-15- an oral, ready-made liquid solution of a selective cyclo-oxygenase-2 inhibitor celecoxib, was superior to placebo for acute treatment of a migraine attack of any pain intensity, along with a favorable safety and tolerability profile.

Major finding: Percentage of patients with freedom from pain (46.2% vs. 31.1%; P less than.001) and freedom from the most bothersome symptom (63.4% vs. 50.0%; P = .010) at 2 hours after dose was significantly higher for DFN-15 vs. placebo. No serious treatment-emergent adverse events or those leading to study drug termination were reported.

Study details: Data come from the second phase of a 2-phase, double-blind, multicenter trial, which re-randomized 535 patients with migraine to placebo or DFN-15 group.

Disclosures: This study was supported and funded by Dr. Reddy’s Laboratories group of companies, Princeton, NJ 08540, USA. The authors declared receiving funding, honoraria, and consulting from various sources. S Munjal reported being an employee and owning stocks and C Iaconangelo declared being a paid consultant of Dr. Reddy’s Laboratories.

Source: Lipton RB et al. J Pain Res. 2021 Feb 25. doi: 10.2147/JPR.S287571.

Key clinical point: DFN-15- an oral, ready-made liquid solution of a selective cyclo-oxygenase-2 inhibitor celecoxib, was superior to placebo for acute treatment of a migraine attack of any pain intensity, along with a favorable safety and tolerability profile.

Major finding: Percentage of patients with freedom from pain (46.2% vs. 31.1%; P less than.001) and freedom from the most bothersome symptom (63.4% vs. 50.0%; P = .010) at 2 hours after dose was significantly higher for DFN-15 vs. placebo. No serious treatment-emergent adverse events or those leading to study drug termination were reported.

Study details: Data come from the second phase of a 2-phase, double-blind, multicenter trial, which re-randomized 535 patients with migraine to placebo or DFN-15 group.

Disclosures: This study was supported and funded by Dr. Reddy’s Laboratories group of companies, Princeton, NJ 08540, USA. The authors declared receiving funding, honoraria, and consulting from various sources. S Munjal reported being an employee and owning stocks and C Iaconangelo declared being a paid consultant of Dr. Reddy’s Laboratories.

Source: Lipton RB et al. J Pain Res. 2021 Feb 25. doi: 10.2147/JPR.S287571.

Key clinical point: Triptan historical responder status had no significant impact on the treatment effects of ubrogepant in patients with a history of migraine.

Major finding: Historical triptan responder status had no significant impact on the efficacy of ubrogepant for pain freedom (P_interaction based on odds ratio [OR] = .290) and absence of migraine-associated symptom (P_interaction based on OR = .705). The incidence of treatment-emergent adverse events (TEAEs) and treatment-related TEAEs was not significantly different across historical triptan experience subgroups.

Study details: This was a post hoc analysis of pooled data from ACHIEVE I and II phase 3 trials involving 1,799 adults with a history of migraine with/without aura randomly allocated to either placebo or ubrogepant to treat a single attack. Based on previous experience with triptans, participants were categorized as responders, insufficient responders, and naïve.

Disclosures: The study was sponsored by Allergan. Some authors including the lead author declared receiving grants and personal fees; being consultant, speaker, or contributing author; or being on advisory boards for various sources including AbbVie. Some authors declared being current/former employees and/or holding stocks at AbbVie.

Source: Blumenfeld AM et al. Headache. 2021 Mar 22. doi: 10.1111/head.14089.

Key clinical point: Triptan historical responder status had no significant impact on the treatment effects of ubrogepant in patients with a history of migraine.

Major finding: Historical triptan responder status had no significant impact on the efficacy of ubrogepant for pain freedom (P_interaction based on odds ratio [OR] = .290) and absence of migraine-associated symptom (P_interaction based on OR = .705). The incidence of treatment-emergent adverse events (TEAEs) and treatment-related TEAEs was not significantly different across historical triptan experience subgroups.

Study details: This was a post hoc analysis of pooled data from ACHIEVE I and II phase 3 trials involving 1,799 adults with a history of migraine with/without aura randomly allocated to either placebo or ubrogepant to treat a single attack. Based on previous experience with triptans, participants were categorized as responders, insufficient responders, and naïve.

Disclosures: The study was sponsored by Allergan. Some authors including the lead author declared receiving grants and personal fees; being consultant, speaker, or contributing author; or being on advisory boards for various sources including AbbVie. Some authors declared being current/former employees and/or holding stocks at AbbVie.

Source: Blumenfeld AM et al. Headache. 2021 Mar 22. doi: 10.1111/head.14089.

Key clinical point: Triptan historical responder status had no significant impact on the treatment effects of ubrogepant in patients with a history of migraine.

Major finding: Historical triptan responder status had no significant impact on the efficacy of ubrogepant for pain freedom (P_interaction based on odds ratio [OR] = .290) and absence of migraine-associated symptom (P_interaction based on OR = .705). The incidence of treatment-emergent adverse events (TEAEs) and treatment-related TEAEs was not significantly different across historical triptan experience subgroups.

Study details: This was a post hoc analysis of pooled data from ACHIEVE I and II phase 3 trials involving 1,799 adults with a history of migraine with/without aura randomly allocated to either placebo or ubrogepant to treat a single attack. Based on previous experience with triptans, participants were categorized as responders, insufficient responders, and naïve.

Disclosures: The study was sponsored by Allergan. Some authors including the lead author declared receiving grants and personal fees; being consultant, speaker, or contributing author; or being on advisory boards for various sources including AbbVie. Some authors declared being current/former employees and/or holding stocks at AbbVie.

Source: Blumenfeld AM et al. Headache. 2021 Mar 22. doi: 10.1111/head.14089.

Key clinical point: Patients with migraine respond to preventive treatment with monoclonal antibodies targeting calcitonin gene-related peptide (anti-CGRP mAbs) irrespective of their previous failure or partial response to onabotulinumtoxinA.

Major finding: A response of 50% or higher improvement in headache (P = .395) or migraine (P = .408) frequency was not significantly different in partial or complete nonresponders to onabotulinumtoxinA.

Study details: This was a real-world prospective observational study including 155 patients with migraine who initiated preventive treatment with anti-CGRP mAbs and were partial or nonresponders to onabotulinumtoxinA.

Disclosures: The authors declared receiving no financial support for the research, authorship, and/or publication of this article. The authors report no conflicts of interest in relation with this article.

Source: Alpuente A et al. Eur J Neurol. 2021 Mar 17. doi: 10.1111/ene.14828.

Key clinical point: Patients with migraine respond to preventive treatment with monoclonal antibodies targeting calcitonin gene-related peptide (anti-CGRP mAbs) irrespective of their previous failure or partial response to onabotulinumtoxinA.

Major finding: A response of 50% or higher improvement in headache (P = .395) or migraine (P = .408) frequency was not significantly different in partial or complete nonresponders to onabotulinumtoxinA.

Study details: This was a real-world prospective observational study including 155 patients with migraine who initiated preventive treatment with anti-CGRP mAbs and were partial or nonresponders to onabotulinumtoxinA.

Disclosures: The authors declared receiving no financial support for the research, authorship, and/or publication of this article. The authors report no conflicts of interest in relation with this article.

Source: Alpuente A et al. Eur J Neurol. 2021 Mar 17. doi: 10.1111/ene.14828.

Key clinical point: Patients with migraine respond to preventive treatment with monoclonal antibodies targeting calcitonin gene-related peptide (anti-CGRP mAbs) irrespective of their previous failure or partial response to onabotulinumtoxinA.

Major finding: A response of 50% or higher improvement in headache (P = .395) or migraine (P = .408) frequency was not significantly different in partial or complete nonresponders to onabotulinumtoxinA.

Study details: This was a real-world prospective observational study including 155 patients with migraine who initiated preventive treatment with anti-CGRP mAbs and were partial or nonresponders to onabotulinumtoxinA.

Disclosures: The authors declared receiving no financial support for the research, authorship, and/or publication of this article. The authors report no conflicts of interest in relation with this article.

Source: Alpuente A et al. Eur J Neurol. 2021 Mar 17. doi: 10.1111/ene.14828.

The Department of Health & Human Services has proposed overturning rules issued during the Trump administration that effectively prohibit clinicians at Title X–funded health clinics from discussing abortion or referring patients for abortions.

HHS proposed the overhaul of the Title X regulations on April 14. The previous administration’s 2019 rules “have undermined the public health of the population the program is meant to serve,” HHS said in the introduction to its proposal.

Medical organizations and reproductive health specialists lauded the move.

“Clinicians providing care to patients must be empowered to share the full spectrum of accurate medical information necessary to ensure that their patients are able to make timely, fully informed medical decisions,” Maureen G. Phipps, MD, MPH, CEO of the American College of Obstetricians and Gynecologists, said in a statement. “This means transparent, respectful, evidence-based conversations about contraception and abortion care. The proposed rule will ensure that those conversations can once again happen without restrictions, interference, or threat of financial loss.”

“Providers of comprehensive reproductive health care, including abortion care, base their relationships with their patients on trust,” Physicians for Reproductive Health President and CEO Jamila Perritt, MD, said in a statement. “The Title X gag rule went against everything we knew as providers of ethical, evidence-based health care by forcing providers at Title X funded clinics to withhold information that their patients needed and requested.”

HHS said that, since 2019, more than 1,000 Title X–funded service sites (25% of the total) have withdrawn from the program. Currently, Title X services – which include family planning, STI testing, cancer screening, and HIV testing and treatment – are not available in six states and are only available on a limited basis in six additional states. Planned Parenthood fully withdrew from Title X.

HHS said that tens of thousands fewer birth control implant procedures have been performed and that hundreds of thousands fewer Pap tests and a half-million or more fewer tests for chlamydia and gonorrhea have been conducted. In addition, the reduction in services may have led to up to 181,477 unintended pregnancies, HHS said.

The closure of sites and decreased availability of services have also exacerbated health inequities, according to the department.

The loss of services “has been especially felt by those already facing disproportionate barriers to accessing care, including the Black, Latinx and Indigenous communities that have also suffered the most harm during the COVID-19 pandemic,” agreed Dr. Phipps.

The new regulation proposes to “ensure access to equitable, affordable, client-centered, quality family-planning services for all clients, especially for low-income clients,” HHS said.

The proposed change in the rules “brings us one step closer to restoring access to necessary care for millions of low-income and uninsured patients who depend on Title X for family planning services,” American Medical Association President Susan R. Bailey, MD, said in a statement. “We are pleased that the Biden administration shares our commitment to undoing this dangerous and discriminatory ‘gag rule,’ and look forward to its elimination through any means necessary to achieve the best outcome for patients and physicians – improving the health of our nation.”

Planned Parenthood also applauded the move, and the HIV Medicine Association thanked the Biden administration for its proposal, which it called “a major step to improve #HealthEquity for all people in this country,” in a tweet.

March for Life, an antiabortion group, however, said it strongly opposed the HHS proposal. The rules “appear specifically designed to bring America’s largest abortion provider, Planned Parenthood, back into the taxpayer-funded program and keep prolife organizations out,” said the group in a tweet.

“Abortion is neither health care nor family planning, and the Title X program should not be funding it,” said the group.

The Title X program does not pay for abortions, however.

The Trump administration rules prohibit abortion referrals and impose counseling standards for pregnant patients and what the Guttmacher Institute called “unnecessary and stringent requirements for the physical and financial separation of Title X–funded activities from a range of abortion-related activities.”

The new rules would reestablish regulations from 2000, with some new additions. For instance, the program will “formally integrate elements of quality family-planning services guidelines developed by [Centers for Disease Control and Prevention] and Office of Population Affairs,” tweeted Alina Salganicoff, director of women’s health policy at the Kaiser Family Foundation. “That means that higher standards for providing family planning will be required,” she tweeted. In addition, sites that offer natural family planning and abstinence “will only be able to participate if they offer referrals to other providers that offer clients access to the contraceptive of their choice.”

The proposed rules are open for public comment for 30 days. They could be made final by the fall. The Kaiser Family Foundation reports that many sites could be ready to return to the program by then, especially since the recently passed coronavirus relief package, the American Rescue Plan, included a $50 million supplemental appropriation for Title X.

The 2019 rules remain in effect in the meantime, although the U.S. Supreme Court agreed in February to hear a challenge mounted by 21 states, the city of Baltimore, and organizations that included the AMA and Planned Parenthood. Those plaintiffs have requested that the case be dismissed, but it currently remains on the docket.

Not all medical providers are likely to support the new rules if they go into effect. The American Association of Pro-Life Obstetricians and Gynecologists, the Christian Medical and Dental Associations, and the Catholic Medical Association filed motions in the Supreme Court case to defend the Trump regulations.

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

The Department of Health & Human Services has proposed overturning rules issued during the Trump administration that effectively prohibit clinicians at Title X–funded health clinics from discussing abortion or referring patients for abortions.

HHS proposed the overhaul of the Title X regulations on April 14. The previous administration’s 2019 rules “have undermined the public health of the population the program is meant to serve,” HHS said in the introduction to its proposal.

Medical organizations and reproductive health specialists lauded the move.

“Clinicians providing care to patients must be empowered to share the full spectrum of accurate medical information necessary to ensure that their patients are able to make timely, fully informed medical decisions,” Maureen G. Phipps, MD, MPH, CEO of the American College of Obstetricians and Gynecologists, said in a statement. “This means transparent, respectful, evidence-based conversations about contraception and abortion care. The proposed rule will ensure that those conversations can once again happen without restrictions, interference, or threat of financial loss.”

“Providers of comprehensive reproductive health care, including abortion care, base their relationships with their patients on trust,” Physicians for Reproductive Health President and CEO Jamila Perritt, MD, said in a statement. “The Title X gag rule went against everything we knew as providers of ethical, evidence-based health care by forcing providers at Title X funded clinics to withhold information that their patients needed and requested.”

HHS said that, since 2019, more than 1,000 Title X–funded service sites (25% of the total) have withdrawn from the program. Currently, Title X services – which include family planning, STI testing, cancer screening, and HIV testing and treatment – are not available in six states and are only available on a limited basis in six additional states. Planned Parenthood fully withdrew from Title X.

HHS said that tens of thousands fewer birth control implant procedures have been performed and that hundreds of thousands fewer Pap tests and a half-million or more fewer tests for chlamydia and gonorrhea have been conducted. In addition, the reduction in services may have led to up to 181,477 unintended pregnancies, HHS said.

The closure of sites and decreased availability of services have also exacerbated health inequities, according to the department.

The loss of services “has been especially felt by those already facing disproportionate barriers to accessing care, including the Black, Latinx and Indigenous communities that have also suffered the most harm during the COVID-19 pandemic,” agreed Dr. Phipps.

The new regulation proposes to “ensure access to equitable, affordable, client-centered, quality family-planning services for all clients, especially for low-income clients,” HHS said.

The proposed change in the rules “brings us one step closer to restoring access to necessary care for millions of low-income and uninsured patients who depend on Title X for family planning services,” American Medical Association President Susan R. Bailey, MD, said in a statement. “We are pleased that the Biden administration shares our commitment to undoing this dangerous and discriminatory ‘gag rule,’ and look forward to its elimination through any means necessary to achieve the best outcome for patients and physicians – improving the health of our nation.”

Planned Parenthood also applauded the move, and the HIV Medicine Association thanked the Biden administration for its proposal, which it called “a major step to improve #HealthEquity for all people in this country,” in a tweet.

March for Life, an antiabortion group, however, said it strongly opposed the HHS proposal. The rules “appear specifically designed to bring America’s largest abortion provider, Planned Parenthood, back into the taxpayer-funded program and keep prolife organizations out,” said the group in a tweet.

“Abortion is neither health care nor family planning, and the Title X program should not be funding it,” said the group.

The Title X program does not pay for abortions, however.

The Trump administration rules prohibit abortion referrals and impose counseling standards for pregnant patients and what the Guttmacher Institute called “unnecessary and stringent requirements for the physical and financial separation of Title X–funded activities from a range of abortion-related activities.”

The new rules would reestablish regulations from 2000, with some new additions. For instance, the program will “formally integrate elements of quality family-planning services guidelines developed by [Centers for Disease Control and Prevention] and Office of Population Affairs,” tweeted Alina Salganicoff, director of women’s health policy at the Kaiser Family Foundation. “That means that higher standards for providing family planning will be required,” she tweeted. In addition, sites that offer natural family planning and abstinence “will only be able to participate if they offer referrals to other providers that offer clients access to the contraceptive of their choice.”

The proposed rules are open for public comment for 30 days. They could be made final by the fall. The Kaiser Family Foundation reports that many sites could be ready to return to the program by then, especially since the recently passed coronavirus relief package, the American Rescue Plan, included a $50 million supplemental appropriation for Title X.

The 2019 rules remain in effect in the meantime, although the U.S. Supreme Court agreed in February to hear a challenge mounted by 21 states, the city of Baltimore, and organizations that included the AMA and Planned Parenthood. Those plaintiffs have requested that the case be dismissed, but it currently remains on the docket.

Not all medical providers are likely to support the new rules if they go into effect. The American Association of Pro-Life Obstetricians and Gynecologists, the Christian Medical and Dental Associations, and the Catholic Medical Association filed motions in the Supreme Court case to defend the Trump regulations.

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

The Department of Health & Human Services has proposed overturning rules issued during the Trump administration that effectively prohibit clinicians at Title X–funded health clinics from discussing abortion or referring patients for abortions.

HHS proposed the overhaul of the Title X regulations on April 14. The previous administration’s 2019 rules “have undermined the public health of the population the program is meant to serve,” HHS said in the introduction to its proposal.

Medical organizations and reproductive health specialists lauded the move.

“Clinicians providing care to patients must be empowered to share the full spectrum of accurate medical information necessary to ensure that their patients are able to make timely, fully informed medical decisions,” Maureen G. Phipps, MD, MPH, CEO of the American College of Obstetricians and Gynecologists, said in a statement. “This means transparent, respectful, evidence-based conversations about contraception and abortion care. The proposed rule will ensure that those conversations can once again happen without restrictions, interference, or threat of financial loss.”

“Providers of comprehensive reproductive health care, including abortion care, base their relationships with their patients on trust,” Physicians for Reproductive Health President and CEO Jamila Perritt, MD, said in a statement. “The Title X gag rule went against everything we knew as providers of ethical, evidence-based health care by forcing providers at Title X funded clinics to withhold information that their patients needed and requested.”

HHS said that, since 2019, more than 1,000 Title X–funded service sites (25% of the total) have withdrawn from the program. Currently, Title X services – which include family planning, STI testing, cancer screening, and HIV testing and treatment – are not available in six states and are only available on a limited basis in six additional states. Planned Parenthood fully withdrew from Title X.

HHS said that tens of thousands fewer birth control implant procedures have been performed and that hundreds of thousands fewer Pap tests and a half-million or more fewer tests for chlamydia and gonorrhea have been conducted. In addition, the reduction in services may have led to up to 181,477 unintended pregnancies, HHS said.

The closure of sites and decreased availability of services have also exacerbated health inequities, according to the department.

The loss of services “has been especially felt by those already facing disproportionate barriers to accessing care, including the Black, Latinx and Indigenous communities that have also suffered the most harm during the COVID-19 pandemic,” agreed Dr. Phipps.

The new regulation proposes to “ensure access to equitable, affordable, client-centered, quality family-planning services for all clients, especially for low-income clients,” HHS said.

The proposed change in the rules “brings us one step closer to restoring access to necessary care for millions of low-income and uninsured patients who depend on Title X for family planning services,” American Medical Association President Susan R. Bailey, MD, said in a statement. “We are pleased that the Biden administration shares our commitment to undoing this dangerous and discriminatory ‘gag rule,’ and look forward to its elimination through any means necessary to achieve the best outcome for patients and physicians – improving the health of our nation.”

Planned Parenthood also applauded the move, and the HIV Medicine Association thanked the Biden administration for its proposal, which it called “a major step to improve #HealthEquity for all people in this country,” in a tweet.

March for Life, an antiabortion group, however, said it strongly opposed the HHS proposal. The rules “appear specifically designed to bring America’s largest abortion provider, Planned Parenthood, back into the taxpayer-funded program and keep prolife organizations out,” said the group in a tweet.

“Abortion is neither health care nor family planning, and the Title X program should not be funding it,” said the group.

The Title X program does not pay for abortions, however.

The Trump administration rules prohibit abortion referrals and impose counseling standards for pregnant patients and what the Guttmacher Institute called “unnecessary and stringent requirements for the physical and financial separation of Title X–funded activities from a range of abortion-related activities.”

The new rules would reestablish regulations from 2000, with some new additions. For instance, the program will “formally integrate elements of quality family-planning services guidelines developed by [Centers for Disease Control and Prevention] and Office of Population Affairs,” tweeted Alina Salganicoff, director of women’s health policy at the Kaiser Family Foundation. “That means that higher standards for providing family planning will be required,” she tweeted. In addition, sites that offer natural family planning and abstinence “will only be able to participate if they offer referrals to other providers that offer clients access to the contraceptive of their choice.”

The proposed rules are open for public comment for 30 days. They could be made final by the fall. The Kaiser Family Foundation reports that many sites could be ready to return to the program by then, especially since the recently passed coronavirus relief package, the American Rescue Plan, included a $50 million supplemental appropriation for Title X.

The 2019 rules remain in effect in the meantime, although the U.S. Supreme Court agreed in February to hear a challenge mounted by 21 states, the city of Baltimore, and organizations that included the AMA and Planned Parenthood. Those plaintiffs have requested that the case be dismissed, but it currently remains on the docket.

Not all medical providers are likely to support the new rules if they go into effect. The American Association of Pro-Life Obstetricians and Gynecologists, the Christian Medical and Dental Associations, and the Catholic Medical Association filed motions in the Supreme Court case to defend the Trump regulations.

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

An investigational polymerase chain reaction (PCR) test that detects the presence of a viral gene in Lyme disease–causing bacteria can distinguish between early and late infection, according to the results of a study that the authors described as “systematic and comprehensive.”

“The current way of diagnosing Lyme disease is struggling to reflect the ‘true’ incidence of Lyme disease,” study investigator Jinyu Shan, PhD, said in an interview. Although there are tests for Lyme disease approved by the Food and Drug Administration, they are based on the development of antibodies in the blood, and the problem is that antibodies might not develop until several weeks after an infection.

Diagnosis therefore still relies heavily on the clinician’s experience. There are often telltale signs – such as a “bullseye” skin rash or having been to an area known to be infested with ticks that carry Lyme disease – but this might not always be the case.

For the new test, “we’re not targeting bacteria. We’re targeting bacteriophages,” said Dr. Shan, a research fellow in the department of genetics and genome biology at the University of Leicester (England).

Fortunately, there’s high correlation between the presence of the terL gene and the presence of Borrelia burgdorferi, the spirochete that causes Lyme disease. “If you find the bacteriophages, the bacteria are there,” said Dr. Shan.

“Importantly, there are 10 times more bacteriophages, compared with the bacteria, so you have a lot more targets,” he added.

In an evaluation of a total of 312 samples (156 whole blood and 156 serum samples), significantly fewer copies of the terL gene were found in samples from people with early Lyme disease than in those with late Lyme disease, whereas the fewest copies of terL were seen in healthy volunteers.

Most pathogenic bacteria carry viral DNA either as multiple complete or partial prophages, Dr. Shan explained. Knowing the prophage sequences means that quantitative PCR primers and probes can be designed and used to detect the presence of the associated bacteria.

Although the novel test still needs evaluation in a clinical trial, it could represent a “step-change” in the detection of Lyme disease, Dr. Shan and associates suggested in their report published in Frontiers in Microbiology.

CDC/ Dr. Amanda Loftis, Dr. William Nicholson, Dr. Will Reeves, Dr. Chris Paddock

Early treatment is key to the prevention of longer-term consequences of Lyme disease. Clinicians familiar with the treatment of Lyme disease might choose to initiate antibiotic treatment without a positive lab test. However, the lack of a test that can pick out people with Lyme disease in the first few weeks of infection means that many people are not diagnosed or treated early enough.

The new phage-based PCR test Dr. Shan and associates have developed could change all that. With only 0.3 mL of blood being needed, it can potentially be developed as a simple point-of-care test, but that’s a long way off.

At this stage, the research is very much a “proof of concept,” Dr. Shan said. One of the things he plans to try to work out next is whether the test can distinguish between active and dormant disease, which is a “big question” in the diagnosis of Lyme disease.

“Bacteriophages can only be sustained by actively growing bacteria,” explained Dr. Shan, so there is a chance that if they are present in a substantive amount the disease is active, and if they are not – or are in very low numbers – then the disease is dormant. The cutoff value, however, “is not trivial to establish, but we are working toward it,” added Dr. Shan.

Over the past 2 years, Dr. Shan and associates have been working with the Belgian-based diagnostics company, R.E.D Laboratories, to see how the test will fare in a real-world environment. This relationship is providing useful information to add to their bid to perform a clinical trial for which they are now seeking additional sponsorship.

“The lack of an early and effective diagnosis of Lyme disease remains a major cause of misdiagnosis and long-term patient suffering,” commented Rosie Milsom, charity manager for Caudwell LymeCo Charity in the United Kingdom.

It could be a game changer if the test passes the necessary clinical trial testing and validation stages, noted Ms. Milsom, who was not involved in the research.

“Not only would the test help to establish the level or length of infection,” she said, “but it could also act as a way to test after treatment to see if the infection levels are decreasing.” If levels are still high, “you would know more treatment is needed.

The research is being funded by the charity Phelix Research and Development with support from the University of Leicester and the Dutch-based Lyme Fund, Lymefonds. Dr. Shan is named as coinventor of the phage-targeting PCR test, alongside Martha R.J. Clokie, professor of microbiology at the University of Leicester and the senior author of the study. Dr. Shan is chief scientific officer for Phelix Research and Development. Ms. Clokie and other coauthors hold key positions within the medical research charity.

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

An investigational polymerase chain reaction (PCR) test that detects the presence of a viral gene in Lyme disease–causing bacteria can distinguish between early and late infection, according to the results of a study that the authors described as “systematic and comprehensive.”

“The current way of diagnosing Lyme disease is struggling to reflect the ‘true’ incidence of Lyme disease,” study investigator Jinyu Shan, PhD, said in an interview. Although there are tests for Lyme disease approved by the Food and Drug Administration, they are based on the development of antibodies in the blood, and the problem is that antibodies might not develop until several weeks after an infection.

Diagnosis therefore still relies heavily on the clinician’s experience. There are often telltale signs – such as a “bullseye” skin rash or having been to an area known to be infested with ticks that carry Lyme disease – but this might not always be the case.

For the new test, “we’re not targeting bacteria. We’re targeting bacteriophages,” said Dr. Shan, a research fellow in the department of genetics and genome biology at the University of Leicester (England).

Fortunately, there’s high correlation between the presence of the terL gene and the presence of Borrelia burgdorferi, the spirochete that causes Lyme disease. “If you find the bacteriophages, the bacteria are there,” said Dr. Shan.

“Importantly, there are 10 times more bacteriophages, compared with the bacteria, so you have a lot more targets,” he added.

In an evaluation of a total of 312 samples (156 whole blood and 156 serum samples), significantly fewer copies of the terL gene were found in samples from people with early Lyme disease than in those with late Lyme disease, whereas the fewest copies of terL were seen in healthy volunteers.

Most pathogenic bacteria carry viral DNA either as multiple complete or partial prophages, Dr. Shan explained. Knowing the prophage sequences means that quantitative PCR primers and probes can be designed and used to detect the presence of the associated bacteria.

Although the novel test still needs evaluation in a clinical trial, it could represent a “step-change” in the detection of Lyme disease, Dr. Shan and associates suggested in their report published in Frontiers in Microbiology.

CDC/ Dr. Amanda Loftis, Dr. William Nicholson, Dr. Will Reeves, Dr. Chris Paddock

Early treatment is key to the prevention of longer-term consequences of Lyme disease. Clinicians familiar with the treatment of Lyme disease might choose to initiate antibiotic treatment without a positive lab test. However, the lack of a test that can pick out people with Lyme disease in the first few weeks of infection means that many people are not diagnosed or treated early enough.

The new phage-based PCR test Dr. Shan and associates have developed could change all that. With only 0.3 mL of blood being needed, it can potentially be developed as a simple point-of-care test, but that’s a long way off.

At this stage, the research is very much a “proof of concept,” Dr. Shan said. One of the things he plans to try to work out next is whether the test can distinguish between active and dormant disease, which is a “big question” in the diagnosis of Lyme disease.

“Bacteriophages can only be sustained by actively growing bacteria,” explained Dr. Shan, so there is a chance that if they are present in a substantive amount the disease is active, and if they are not – or are in very low numbers – then the disease is dormant. The cutoff value, however, “is not trivial to establish, but we are working toward it,” added Dr. Shan.

Over the past 2 years, Dr. Shan and associates have been working with the Belgian-based diagnostics company, R.E.D Laboratories, to see how the test will fare in a real-world environment. This relationship is providing useful information to add to their bid to perform a clinical trial for which they are now seeking additional sponsorship.

“The lack of an early and effective diagnosis of Lyme disease remains a major cause of misdiagnosis and long-term patient suffering,” commented Rosie Milsom, charity manager for Caudwell LymeCo Charity in the United Kingdom.

It could be a game changer if the test passes the necessary clinical trial testing and validation stages, noted Ms. Milsom, who was not involved in the research.

“Not only would the test help to establish the level or length of infection,” she said, “but it could also act as a way to test after treatment to see if the infection levels are decreasing.” If levels are still high, “you would know more treatment is needed.

The research is being funded by the charity Phelix Research and Development with support from the University of Leicester and the Dutch-based Lyme Fund, Lymefonds. Dr. Shan is named as coinventor of the phage-targeting PCR test, alongside Martha R.J. Clokie, professor of microbiology at the University of Leicester and the senior author of the study. Dr. Shan is chief scientific officer for Phelix Research and Development. Ms. Clokie and other coauthors hold key positions within the medical research charity.

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

An investigational polymerase chain reaction (PCR) test that detects the presence of a viral gene in Lyme disease–causing bacteria can distinguish between early and late infection, according to the results of a study that the authors described as “systematic and comprehensive.”

“The current way of diagnosing Lyme disease is struggling to reflect the ‘true’ incidence of Lyme disease,” study investigator Jinyu Shan, PhD, said in an interview. Although there are tests for Lyme disease approved by the Food and Drug Administration, they are based on the development of antibodies in the blood, and the problem is that antibodies might not develop until several weeks after an infection.

Diagnosis therefore still relies heavily on the clinician’s experience. There are often telltale signs – such as a “bullseye” skin rash or having been to an area known to be infested with ticks that carry Lyme disease – but this might not always be the case.

For the new test, “we’re not targeting bacteria. We’re targeting bacteriophages,” said Dr. Shan, a research fellow in the department of genetics and genome biology at the University of Leicester (England).

Fortunately, there’s high correlation between the presence of the terL gene and the presence of Borrelia burgdorferi, the spirochete that causes Lyme disease. “If you find the bacteriophages, the bacteria are there,” said Dr. Shan.

“Importantly, there are 10 times more bacteriophages, compared with the bacteria, so you have a lot more targets,” he added.

In an evaluation of a total of 312 samples (156 whole blood and 156 serum samples), significantly fewer copies of the terL gene were found in samples from people with early Lyme disease than in those with late Lyme disease, whereas the fewest copies of terL were seen in healthy volunteers.

Most pathogenic bacteria carry viral DNA either as multiple complete or partial prophages, Dr. Shan explained. Knowing the prophage sequences means that quantitative PCR primers and probes can be designed and used to detect the presence of the associated bacteria.

Although the novel test still needs evaluation in a clinical trial, it could represent a “step-change” in the detection of Lyme disease, Dr. Shan and associates suggested in their report published in Frontiers in Microbiology.

CDC/ Dr. Amanda Loftis, Dr. William Nicholson, Dr. Will Reeves, Dr. Chris Paddock

Early treatment is key to the prevention of longer-term consequences of Lyme disease. Clinicians familiar with the treatment of Lyme disease might choose to initiate antibiotic treatment without a positive lab test. However, the lack of a test that can pick out people with Lyme disease in the first few weeks of infection means that many people are not diagnosed or treated early enough.

The new phage-based PCR test Dr. Shan and associates have developed could change all that. With only 0.3 mL of blood being needed, it can potentially be developed as a simple point-of-care test, but that’s a long way off.

At this stage, the research is very much a “proof of concept,” Dr. Shan said. One of the things he plans to try to work out next is whether the test can distinguish between active and dormant disease, which is a “big question” in the diagnosis of Lyme disease.

“Bacteriophages can only be sustained by actively growing bacteria,” explained Dr. Shan, so there is a chance that if they are present in a substantive amount the disease is active, and if they are not – or are in very low numbers – then the disease is dormant. The cutoff value, however, “is not trivial to establish, but we are working toward it,” added Dr. Shan.

Over the past 2 years, Dr. Shan and associates have been working with the Belgian-based diagnostics company, R.E.D Laboratories, to see how the test will fare in a real-world environment. This relationship is providing useful information to add to their bid to perform a clinical trial for which they are now seeking additional sponsorship.

“The lack of an early and effective diagnosis of Lyme disease remains a major cause of misdiagnosis and long-term patient suffering,” commented Rosie Milsom, charity manager for Caudwell LymeCo Charity in the United Kingdom.

It could be a game changer if the test passes the necessary clinical trial testing and validation stages, noted Ms. Milsom, who was not involved in the research.

“Not only would the test help to establish the level or length of infection,” she said, “but it could also act as a way to test after treatment to see if the infection levels are decreasing.” If levels are still high, “you would know more treatment is needed.

The research is being funded by the charity Phelix Research and Development with support from the University of Leicester and the Dutch-based Lyme Fund, Lymefonds. Dr. Shan is named as coinventor of the phage-targeting PCR test, alongside Martha R.J. Clokie, professor of microbiology at the University of Leicester and the senior author of the study. Dr. Shan is chief scientific officer for Phelix Research and Development. Ms. Clokie and other coauthors hold key positions within the medical research charity.

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

A Food and Drug Administration advisory panel has endorsed a pancreatic islet cell transplant therapy for the treatment of people with type 1 diabetes that can’t be managed with current therapies.

On April 15, the FDA’s Cellular, Tissue, and Gene Therapies Advisory Committee voted 12 to 4 in favor of approval of donislecel (Lantidra). There was one abstention. The panel regarded the drug as having “an overall favorable benefit-risk profile for some patients with type 1 diabetes.” The product consists of purified allogeneic pancreatic islets of Langerhans derived from cadaveric donors and is infused into the portal vein of the liver.

Benefits of the treatment include the potential for insulin independence and elimination of severe hypoglycemia. Risks are those associated with the surgical procedure and with long-term immunosuppression.

The therapy is manufactured by CellTrans. According to Jose Oberholzer, MD, the founder of CellTrans, the proposed indication is for adults with “brittle” type 1 diabetes who meet the American Diabetes Association’s (ADA) criteria for whole-organ pancreas-alone transplant (i.e., transplant of pancreas but not kidney).

The ADA criteria include the following: frequent, severe hypoglycemia, hyperglycemia, and/or ketoacidosis that requires medical attention; clinical or emotional problems regarding the use of exogenous insulin; and consistent failure of insulin-based management to prevent acute diabetes complications.
 

Success in two-thirds of patients in small studies

Dr. Oberholzer presented data from two single-arm open-label studies: a phase 1/2 trial initiated in 2004 with 10 patients, and a phase 3 study with 20 patients that began in 2007. The inclusion criteria differed somewhat between the two studies, but all 30 patients had hypoglycemic unawareness. Mean follow-up was 7.8 years for the phase 1/2 trial and 4.7 years for the phase 3 trial.

For all of the patients, C-peptide levels were positive after transplant. The composite endpoint for success – an A1c level of ≤ 6.5% and the absence of severe hypoglycemic episodes for 1 year – was met by 19 patients (63.3%). For five patients (16.7%), the target A1c level was not achieved, and seven patients (23.3%) experienced a severe episode of hypoglycemia.

Twenty of the 30 patients achieved insulin independence for at least 1 year.

Improvements were also seen at 1 year in mixed meal test outcomes, fasting blood glucose levels, and overall glycemic control. Graft survival 10 years post transplant was achieved by 60% of patients, Dr. Oberholzer said.
 

Adverse events not unexpected, but still of concern

Two patients died, one as a result of fulminant sepsis at 20 months post transplant, and the other as a result of severe dementia 9 years post transplant. Three patients experienced four serious procedure-related events, including one liver laceration and two hepatic hematomas. Elevations in portal pressure occurred in two patients.

Most adverse events were associated with immunosuppression. These included 178 infections in 26 of the 30 patients. The most common of these were herpes virus infections, Epstein-Barr virus infections, oral candidiasis, and cytomegalovirus infections. Twelve infections were severe. Renal function declined persistently in two patients (20%), and six (20%) experienced new-onset proteinuria at 1 year.

The adverse events related to the procedure and the problems associated with immunosuppression were not unexpected and were consistent with those described for patients receiving whole pancreas transplants, FDA reviewer Patricia Beaston, MD, said in her review of the CellTrans data.
 

Panel members support treatment for a small group of patients

During the discussion, several panel members pointed out that the target patient population for this treatment will likely be smaller today than it was when the two studies were initiated, given advances in diabetes care. Those advances include continuous glucose monitoring devices with alarms and closed-loop insulin delivery systems – the “artificial pancreas” that automatically suspends insulin delivery to prevent hypoglycemia.

Panel chair Lisa Butterfield, PhD, a surgeon and immunologist at the University of California, San Francisco, voted in favor of approval. But, she added, “I do support postapproval gathering of data to learn more about the product. ... I don’t know how many patients will really benefit, but I think it’s to be determined.”

Christopher K. Breuer, MD, a general and pediatric surgeon at the Center for Regenerative Medicine, Nationwide Children’s Hospital, Columbus, Ohio, said he supported approval for “two very small subpopulations where it would provide the only viable therapy”: those who are eligible for pancreas transplant but cannot tolerate a major operation, and those who already use the latest automated insulin delivery systems and still do not achieve acceptable glycemic control.

Temporary voting member David Harlan, MD, director of the University of Massachusetts Diabetes Center of Excellence, Worcester, Mass., voted no.

He noted that only about 100 whole pancreas-only transplants are performed annually in the United States and that such transplants are “very effective, so we’re talking about patients who aren’t pancreas transplant candidates who might get this.”

Moreover, Dr. Harlan said, “I’ve seen the awful things that can happen in posttransplant recipients. It’s really hard to get that informed consent from someone when you’re asking them to consider a future that they don’t know. When it works, it’s great. When it doesn’t work, it can be catastrophic. I just worry about opening Pandora’s box.”

The only other diabetes specialist on the panel, temporary voting member Ellen Leschek, MD, said she “reluctantly voted yes because a few people could benefit, but I think it’s a much smaller number than the company may believe.”

Dr. Leschek, of the National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Md., said she’s concerned that “if it’s approved, too many people will get treated this way, when in fact, for a lot of those people, the risks will outweigh the benefits.”

Sandy Feng, MD, PhD, of the department of surgery at the University of California, San Francisco, pointed out that with regard to immunosuppressive therapy, “We’re concerned about the toxicity of what we currently use, but there are additional therapies being developed that might mitigate those toxicities that would be beneficial to this population.”

Dr. Feng, who voted yes, also said, “I do pancreas transplants. I can tell you that there is nothing that [patients with type 1 diabetes] like more than the freedom from dealing with the entire insulin issue. That has made a large impression on me over the last 20-plus years of clinical practice, so I do think this can help some people and will be incredibly meaningful to those people.”

FDA advisory panel members are vetted for conflicts of interest, and special waivers are granted if necessary. No such waivers were granted for this meeting.

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

A Food and Drug Administration advisory panel has endorsed a pancreatic islet cell transplant therapy for the treatment of people with type 1 diabetes that can’t be managed with current therapies.

On April 15, the FDA’s Cellular, Tissue, and Gene Therapies Advisory Committee voted 12 to 4 in favor of approval of donislecel (Lantidra). There was one abstention. The panel regarded the drug as having “an overall favorable benefit-risk profile for some patients with type 1 diabetes.” The product consists of purified allogeneic pancreatic islets of Langerhans derived from cadaveric donors and is infused into the portal vein of the liver.

Benefits of the treatment include the potential for insulin independence and elimination of severe hypoglycemia. Risks are those associated with the surgical procedure and with long-term immunosuppression.

The therapy is manufactured by CellTrans. According to Jose Oberholzer, MD, the founder of CellTrans, the proposed indication is for adults with “brittle” type 1 diabetes who meet the American Diabetes Association’s (ADA) criteria for whole-organ pancreas-alone transplant (i.e., transplant of pancreas but not kidney).

The ADA criteria include the following: frequent, severe hypoglycemia, hyperglycemia, and/or ketoacidosis that requires medical attention; clinical or emotional problems regarding the use of exogenous insulin; and consistent failure of insulin-based management to prevent acute diabetes complications.
 

Success in two-thirds of patients in small studies

Dr. Oberholzer presented data from two single-arm open-label studies: a phase 1/2 trial initiated in 2004 with 10 patients, and a phase 3 study with 20 patients that began in 2007. The inclusion criteria differed somewhat between the two studies, but all 30 patients had hypoglycemic unawareness. Mean follow-up was 7.8 years for the phase 1/2 trial and 4.7 years for the phase 3 trial.

For all of the patients, C-peptide levels were positive after transplant. The composite endpoint for success – an A1c level of ≤ 6.5% and the absence of severe hypoglycemic episodes for 1 year – was met by 19 patients (63.3%). For five patients (16.7%), the target A1c level was not achieved, and seven patients (23.3%) experienced a severe episode of hypoglycemia.

Twenty of the 30 patients achieved insulin independence for at least 1 year.

Improvements were also seen at 1 year in mixed meal test outcomes, fasting blood glucose levels, and overall glycemic control. Graft survival 10 years post transplant was achieved by 60% of patients, Dr. Oberholzer said.
 

Adverse events not unexpected, but still of concern

Two patients died, one as a result of fulminant sepsis at 20 months post transplant, and the other as a result of severe dementia 9 years post transplant. Three patients experienced four serious procedure-related events, including one liver laceration and two hepatic hematomas. Elevations in portal pressure occurred in two patients.

Most adverse events were associated with immunosuppression. These included 178 infections in 26 of the 30 patients. The most common of these were herpes virus infections, Epstein-Barr virus infections, oral candidiasis, and cytomegalovirus infections. Twelve infections were severe. Renal function declined persistently in two patients (20%), and six (20%) experienced new-onset proteinuria at 1 year.

The adverse events related to the procedure and the problems associated with immunosuppression were not unexpected and were consistent with those described for patients receiving whole pancreas transplants, FDA reviewer Patricia Beaston, MD, said in her review of the CellTrans data.
 

Panel members support treatment for a small group of patients

During the discussion, several panel members pointed out that the target patient population for this treatment will likely be smaller today than it was when the two studies were initiated, given advances in diabetes care. Those advances include continuous glucose monitoring devices with alarms and closed-loop insulin delivery systems – the “artificial pancreas” that automatically suspends insulin delivery to prevent hypoglycemia.

Panel chair Lisa Butterfield, PhD, a surgeon and immunologist at the University of California, San Francisco, voted in favor of approval. But, she added, “I do support postapproval gathering of data to learn more about the product. ... I don’t know how many patients will really benefit, but I think it’s to be determined.”

Christopher K. Breuer, MD, a general and pediatric surgeon at the Center for Regenerative Medicine, Nationwide Children’s Hospital, Columbus, Ohio, said he supported approval for “two very small subpopulations where it would provide the only viable therapy”: those who are eligible for pancreas transplant but cannot tolerate a major operation, and those who already use the latest automated insulin delivery systems and still do not achieve acceptable glycemic control.

Temporary voting member David Harlan, MD, director of the University of Massachusetts Diabetes Center of Excellence, Worcester, Mass., voted no.

He noted that only about 100 whole pancreas-only transplants are performed annually in the United States and that such transplants are “very effective, so we’re talking about patients who aren’t pancreas transplant candidates who might get this.”

Moreover, Dr. Harlan said, “I’ve seen the awful things that can happen in posttransplant recipients. It’s really hard to get that informed consent from someone when you’re asking them to consider a future that they don’t know. When it works, it’s great. When it doesn’t work, it can be catastrophic. I just worry about opening Pandora’s box.”

The only other diabetes specialist on the panel, temporary voting member Ellen Leschek, MD, said she “reluctantly voted yes because a few people could benefit, but I think it’s a much smaller number than the company may believe.”

Dr. Leschek, of the National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Md., said she’s concerned that “if it’s approved, too many people will get treated this way, when in fact, for a lot of those people, the risks will outweigh the benefits.”

Sandy Feng, MD, PhD, of the department of surgery at the University of California, San Francisco, pointed out that with regard to immunosuppressive therapy, “We’re concerned about the toxicity of what we currently use, but there are additional therapies being developed that might mitigate those toxicities that would be beneficial to this population.”

Dr. Feng, who voted yes, also said, “I do pancreas transplants. I can tell you that there is nothing that [patients with type 1 diabetes] like more than the freedom from dealing with the entire insulin issue. That has made a large impression on me over the last 20-plus years of clinical practice, so I do think this can help some people and will be incredibly meaningful to those people.”

FDA advisory panel members are vetted for conflicts of interest, and special waivers are granted if necessary. No such waivers were granted for this meeting.

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

A Food and Drug Administration advisory panel has endorsed a pancreatic islet cell transplant therapy for the treatment of people with type 1 diabetes that can’t be managed with current therapies.

On April 15, the FDA’s Cellular, Tissue, and Gene Therapies Advisory Committee voted 12 to 4 in favor of approval of donislecel (Lantidra). There was one abstention. The panel regarded the drug as having “an overall favorable benefit-risk profile for some patients with type 1 diabetes.” The product consists of purified allogeneic pancreatic islets of Langerhans derived from cadaveric donors and is infused into the portal vein of the liver.

Benefits of the treatment include the potential for insulin independence and elimination of severe hypoglycemia. Risks are those associated with the surgical procedure and with long-term immunosuppression.

The therapy is manufactured by CellTrans. According to Jose Oberholzer, MD, the founder of CellTrans, the proposed indication is for adults with “brittle” type 1 diabetes who meet the American Diabetes Association’s (ADA) criteria for whole-organ pancreas-alone transplant (i.e., transplant of pancreas but not kidney).

The ADA criteria include the following: frequent, severe hypoglycemia, hyperglycemia, and/or ketoacidosis that requires medical attention; clinical or emotional problems regarding the use of exogenous insulin; and consistent failure of insulin-based management to prevent acute diabetes complications.
 

Success in two-thirds of patients in small studies

Dr. Oberholzer presented data from two single-arm open-label studies: a phase 1/2 trial initiated in 2004 with 10 patients, and a phase 3 study with 20 patients that began in 2007. The inclusion criteria differed somewhat between the two studies, but all 30 patients had hypoglycemic unawareness. Mean follow-up was 7.8 years for the phase 1/2 trial and 4.7 years for the phase 3 trial.

For all of the patients, C-peptide levels were positive after transplant. The composite endpoint for success – an A1c level of ≤ 6.5% and the absence of severe hypoglycemic episodes for 1 year – was met by 19 patients (63.3%). For five patients (16.7%), the target A1c level was not achieved, and seven patients (23.3%) experienced a severe episode of hypoglycemia.

Twenty of the 30 patients achieved insulin independence for at least 1 year.

Improvements were also seen at 1 year in mixed meal test outcomes, fasting blood glucose levels, and overall glycemic control. Graft survival 10 years post transplant was achieved by 60% of patients, Dr. Oberholzer said.
 

Adverse events not unexpected, but still of concern

Two patients died, one as a result of fulminant sepsis at 20 months post transplant, and the other as a result of severe dementia 9 years post transplant. Three patients experienced four serious procedure-related events, including one liver laceration and two hepatic hematomas. Elevations in portal pressure occurred in two patients.

Most adverse events were associated with immunosuppression. These included 178 infections in 26 of the 30 patients. The most common of these were herpes virus infections, Epstein-Barr virus infections, oral candidiasis, and cytomegalovirus infections. Twelve infections were severe. Renal function declined persistently in two patients (20%), and six (20%) experienced new-onset proteinuria at 1 year.

The adverse events related to the procedure and the problems associated with immunosuppression were not unexpected and were consistent with those described for patients receiving whole pancreas transplants, FDA reviewer Patricia Beaston, MD, said in her review of the CellTrans data.
 

Panel members support treatment for a small group of patients

During the discussion, several panel members pointed out that the target patient population for this treatment will likely be smaller today than it was when the two studies were initiated, given advances in diabetes care. Those advances include continuous glucose monitoring devices with alarms and closed-loop insulin delivery systems – the “artificial pancreas” that automatically suspends insulin delivery to prevent hypoglycemia.

Panel chair Lisa Butterfield, PhD, a surgeon and immunologist at the University of California, San Francisco, voted in favor of approval. But, she added, “I do support postapproval gathering of data to learn more about the product. ... I don’t know how many patients will really benefit, but I think it’s to be determined.”

Christopher K. Breuer, MD, a general and pediatric surgeon at the Center for Regenerative Medicine, Nationwide Children’s Hospital, Columbus, Ohio, said he supported approval for “two very small subpopulations where it would provide the only viable therapy”: those who are eligible for pancreas transplant but cannot tolerate a major operation, and those who already use the latest automated insulin delivery systems and still do not achieve acceptable glycemic control.

Temporary voting member David Harlan, MD, director of the University of Massachusetts Diabetes Center of Excellence, Worcester, Mass., voted no.

He noted that only about 100 whole pancreas-only transplants are performed annually in the United States and that such transplants are “very effective, so we’re talking about patients who aren’t pancreas transplant candidates who might get this.”

Moreover, Dr. Harlan said, “I’ve seen the awful things that can happen in posttransplant recipients. It’s really hard to get that informed consent from someone when you’re asking them to consider a future that they don’t know. When it works, it’s great. When it doesn’t work, it can be catastrophic. I just worry about opening Pandora’s box.”

The only other diabetes specialist on the panel, temporary voting member Ellen Leschek, MD, said she “reluctantly voted yes because a few people could benefit, but I think it’s a much smaller number than the company may believe.”

Dr. Leschek, of the National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Md., said she’s concerned that “if it’s approved, too many people will get treated this way, when in fact, for a lot of those people, the risks will outweigh the benefits.”

Sandy Feng, MD, PhD, of the department of surgery at the University of California, San Francisco, pointed out that with regard to immunosuppressive therapy, “We’re concerned about the toxicity of what we currently use, but there are additional therapies being developed that might mitigate those toxicities that would be beneficial to this population.”

Dr. Feng, who voted yes, also said, “I do pancreas transplants. I can tell you that there is nothing that [patients with type 1 diabetes] like more than the freedom from dealing with the entire insulin issue. That has made a large impression on me over the last 20-plus years of clinical practice, so I do think this can help some people and will be incredibly meaningful to those people.”

FDA advisory panel members are vetted for conflicts of interest, and special waivers are granted if necessary. No such waivers were granted for this meeting.

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

Research suggests certain gut bacteria can reduce the efficacy of radiotherapy against cancers, but targeting those bacteria with vancomycin can reverse this effect.

Andrea Facciabene, PhD, of the University of Pennsylvania, Philadelphia, and colleagues conducted a preclinical study in which vancomycin enhanced the efficacy of radiotherapy against melanoma and lung cancer. Now, researchers are conducting a clinical trial to determine if vancomycin can have the same effect in patients with non–small cell lung cancer.

Dr. Facciabene reviewed this research at the AACR Virtual Special Conference: Radiation Science and Medicine.

According to Dr. Facciabene, “gut microbiota” includes the more than 1,000 different strains of bacteria living in human intestines. He indicated that the average human has 10 times more bacteria than cells in the body and 150 times more genes in the gut microbiome than in the human genome.

In healthy individuals, the gut microbiota play a key role in intestinal function and digestive processes, modulation of hormones and vitamin secretion, energy extraction from food, and development and maintenance of a balanced immune system.

“Dysbiosis” is the term applied to a change in the composition, diversity, or metabolites of the microbiome from a healthy pattern to one associated with disease. Antibiotic therapy is a classic cause of dysbiosis, and dysbiosis has been implicated in a variety of inflammatory diseases.

The mechanisms by which the gut microbiome could influence systemic immunity is not known but is relevant to cancer therapy response. Augmenting the frequency and durability of response to immune-targeted treatments – potentially by manipulating the influence of gut microbiota on the immune system – could be highly impactful.
 

Gut microbiota and radiation-induced cell death

Immunogenic cell death – a process by which tumors die and release their intracellular molecular contents – is one of the mechanisms by which radiotherapy kills cancer cells.

Tumor cells succumbing to immunogenic cell death stimulate antigen presenting cells, such as dendritic cells, that engulf tumor antigens and cross-present them to CD8+ cytotoxic T lymphocytes. This process culminates in the generation of a specific immune response capable of killing the malignant cells in the irradiated area, but it also impacts distant nonirradiated tumors – an abscopal effect.

Dr. Facciabene and colleagues hypothesized that alterations of the gut microbiota could have an impact on the effect of radiotherapy. To investigate this, they studied mouse models of melanoma.

The team allowed B16-OVA tumors to grow for 9-12 days, then delivered a single dose of radiotherapy (21 Gy) to one – but not all – tumors. Simultaneously with the delivery of radiotherapy, the investigators started some animals on oral vancomycin. The team chose vancomycin because its effects are localized and impact the gut microbiota directly, without any known systemic effects.

Results showed that vancomycin significantly augmented the impact of radiotherapy in the irradiated area and was associated with regression of remote tumors.

The effects of the combination treatment on tumor volume were significantly greater than the effects of either treatment alone. Since manipulation of the gut microbiome potentiated radiotherapy effects both locally and distantly, the investigators concluded that immunogenic cell death may be involved in both the local and abscopal effects of radiotherapy.

When the experiment was repeated with a lung tumor model, similar findings were observed.
 

Involvement of cytotoxic T cells and interferon-gamma

Dr. Facciabene and colleagues found that the irradiated and unirradiated B16 OVA melanoma tumors treated with the radiotherapy-vancomycin combination were infiltrated by CD3+ and CD8+ T cells.

The investigators selectively depleted CD8+ T cells by pretreating the mice with an anti-CD8 monoclonal antibody. Depletion of CD8+ cells prior to administering radiotherapy plus vancomycin abrogated the antitumor effects of the combination treatment, demonstrating that the CD8+ T cells were required.

To characterize the antigen specificity of the tumor-infiltrating CD8+ T cells, Dr. Facciabene and colleagues used OVA MHC class 1 tetramer. Tumors from mice treated with vancomycin alone, radiotherapy alone, or the combination were dissected. Individual dendritic cells were assayed for OVA tetramer by flow cytometry.

The investigators found that tumors from mice treated with radiotherapy plus vancomycin had a significantly higher number of OVA-specific CD8+ T cells, in comparison with untreated tumors or tumors treated with either vancomycin alone or radiotherapy alone. Since antibody that impaired recognition of MHC class I peptides by T cells ablated the effect, it was clear that antigen recognition was vital.

Interferon-gamma (IFN-gamma) is known to play a critical role in both differentiation and effector functions of CD8+ cytolytic T cells in the antitumor immune response. To determine whether IFN-gamma is involved in the antitumor effects of the radiotherapy-vancomycin combination, the investigators measured intratumoral expression of IFN-gamma in the tumors 5 days after radiotherapy.

IFN-gamma messenger RNA expression levels were significantly elevated in the combination treatment group when compared with either treatment alone. In B16-OVA melanoma–challenged knockout mice, the enhancement of the radiotherapy effects by vancomycin was ablated.

The investigators concluded that vancomycin remodels the tumor microenvironment and increases the functionality of tumor-infiltrating, tumor-specific, CD8+ T cells. Furthermore, IFN-gamma is required to augment the radiotherapy-induced immune effect against the tumor.
 

Potential biochemical mediators of immune effects

The gut microbiota aid host digestion and generate a large repertoire of metabolites after defermentation of fiber. Short-chain fatty acids (SCFAs) constitute the major products of bacterial fermentation.

Acetic acid, propionic acid, and butyric acid represent 95% of total SCFAs present in the intestine. SCFAs are known to directly modulate cytokine production and dendritic cell function.

In their study, Dr. Facciabene and colleagues focused on butyric acid. Using mass spectroscopy, they demonstrated that vancomycin treatment reduces butyrate concentrations in tumor and tumor-draining lymph nodes by eradicating the major families of SCFA-producing Clostridia species.

To test whether supplementing butyrate could influence the synergy of the radiotherapy-vancomycin combination in vivo, the investigators added sodium butyrate to the mice’s drinking water when starting vancomycin treatment. The team then challenged the mice with B16-OVA tumors and treated them with radiotherapy.

In agreement with the group’s prior findings, vancomycin enhanced the tumor-inhibitory effects of radiotherapy, but dietary butyrate inhibited the benefit. The investigators found a significant decrease in the population of B16-OVA–presenting dendritic cells in the lymph nodes of mice receiving the supplemental butyrate.

Dr. Facciabene said these findings were supported by a recent publication. The authors observed that butyrate inhibited type I IFN expression in dendritic cells and radiotherapy-induced, tumor-specific cytotoxic T-cell immune responses without directly protecting tumor cells from the cytotoxic effects of radiotherapy.
 

Wide-ranging implications

Overall, Dr. Facciabene’s research has shown that:

• Vancomycin significantly enhances the tumor inhibitory effect of targeted radiation, including abscopal effects.
• The synergistic effects are dependent upon IFN-gamma and CD8+ cells.
• Depletion of some gut microbiome species increases antigen presentation by dendritic cells. This is mediated by SCFAs produced by certain bacterial families.
• There are promising new strategies to improve responses to radiotherapy, including targeting gut microbiota.

A clinical trial (NCT03546829) of vancomycin plus stereotactic body radiation in patients with locally advanced non–small cell lung cancer has been launched to investigate these findings further. Early data analysis has shown a significant impact of vancomycin on several species of gut microbiota, according to Dr. Facciabene.

Revolutionary results from immune-targeted therapy in the recent past have highlighted the important role the immune system can play in fighting cancer. Still, up to one-third of cancer patients fail to respond to overtly immune-targeted therapy.

The ability to inhibit cancer cells from evading immune surveillance by using new adjuvants – including those acting on non-traditional targets like gut microbiota – could herald the next major advances in cancer therapy. During his presentation, Dr. Facciabene gave participants an enticing hint of what could be coming for cancer patients in the years ahead.

Dr. Facciabene reported having no relevant disclosures.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers, as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

Research suggests certain gut bacteria can reduce the efficacy of radiotherapy against cancers, but targeting those bacteria with vancomycin can reverse this effect.

Andrea Facciabene, PhD, of the University of Pennsylvania, Philadelphia, and colleagues conducted a preclinical study in which vancomycin enhanced the efficacy of radiotherapy against melanoma and lung cancer. Now, researchers are conducting a clinical trial to determine if vancomycin can have the same effect in patients with non–small cell lung cancer.

Dr. Facciabene reviewed this research at the AACR Virtual Special Conference: Radiation Science and Medicine.

According to Dr. Facciabene, “gut microbiota” includes the more than 1,000 different strains of bacteria living in human intestines. He indicated that the average human has 10 times more bacteria than cells in the body and 150 times more genes in the gut microbiome than in the human genome.

In healthy individuals, the gut microbiota play a key role in intestinal function and digestive processes, modulation of hormones and vitamin secretion, energy extraction from food, and development and maintenance of a balanced immune system.

“Dysbiosis” is the term applied to a change in the composition, diversity, or metabolites of the microbiome from a healthy pattern to one associated with disease. Antibiotic therapy is a classic cause of dysbiosis, and dysbiosis has been implicated in a variety of inflammatory diseases.

The mechanisms by which the gut microbiome could influence systemic immunity is not known but is relevant to cancer therapy response. Augmenting the frequency and durability of response to immune-targeted treatments – potentially by manipulating the influence of gut microbiota on the immune system – could be highly impactful.
 

Gut microbiota and radiation-induced cell death

Immunogenic cell death – a process by which tumors die and release their intracellular molecular contents – is one of the mechanisms by which radiotherapy kills cancer cells.

Tumor cells succumbing to immunogenic cell death stimulate antigen presenting cells, such as dendritic cells, that engulf tumor antigens and cross-present them to CD8+ cytotoxic T lymphocytes. This process culminates in the generation of a specific immune response capable of killing the malignant cells in the irradiated area, but it also impacts distant nonirradiated tumors – an abscopal effect.

Dr. Facciabene and colleagues hypothesized that alterations of the gut microbiota could have an impact on the effect of radiotherapy. To investigate this, they studied mouse models of melanoma.

The team allowed B16-OVA tumors to grow for 9-12 days, then delivered a single dose of radiotherapy (21 Gy) to one – but not all – tumors. Simultaneously with the delivery of radiotherapy, the investigators started some animals on oral vancomycin. The team chose vancomycin because its effects are localized and impact the gut microbiota directly, without any known systemic effects.

Results showed that vancomycin significantly augmented the impact of radiotherapy in the irradiated area and was associated with regression of remote tumors.

The effects of the combination treatment on tumor volume were significantly greater than the effects of either treatment alone. Since manipulation of the gut microbiome potentiated radiotherapy effects both locally and distantly, the investigators concluded that immunogenic cell death may be involved in both the local and abscopal effects of radiotherapy.

When the experiment was repeated with a lung tumor model, similar findings were observed.
 

Involvement of cytotoxic T cells and interferon-gamma

Dr. Facciabene and colleagues found that the irradiated and unirradiated B16 OVA melanoma tumors treated with the radiotherapy-vancomycin combination were infiltrated by CD3+ and CD8+ T cells.

The investigators selectively depleted CD8+ T cells by pretreating the mice with an anti-CD8 monoclonal antibody. Depletion of CD8+ cells prior to administering radiotherapy plus vancomycin abrogated the antitumor effects of the combination treatment, demonstrating that the CD8+ T cells were required.

To characterize the antigen specificity of the tumor-infiltrating CD8+ T cells, Dr. Facciabene and colleagues used OVA MHC class 1 tetramer. Tumors from mice treated with vancomycin alone, radiotherapy alone, or the combination were dissected. Individual dendritic cells were assayed for OVA tetramer by flow cytometry.

The investigators found that tumors from mice treated with radiotherapy plus vancomycin had a significantly higher number of OVA-specific CD8+ T cells, in comparison with untreated tumors or tumors treated with either vancomycin alone or radiotherapy alone. Since antibody that impaired recognition of MHC class I peptides by T cells ablated the effect, it was clear that antigen recognition was vital.

Interferon-gamma (IFN-gamma) is known to play a critical role in both differentiation and effector functions of CD8+ cytolytic T cells in the antitumor immune response. To determine whether IFN-gamma is involved in the antitumor effects of the radiotherapy-vancomycin combination, the investigators measured intratumoral expression of IFN-gamma in the tumors 5 days after radiotherapy.

IFN-gamma messenger RNA expression levels were significantly elevated in the combination treatment group when compared with either treatment alone. In B16-OVA melanoma–challenged knockout mice, the enhancement of the radiotherapy effects by vancomycin was ablated.

The investigators concluded that vancomycin remodels the tumor microenvironment and increases the functionality of tumor-infiltrating, tumor-specific, CD8+ T cells. Furthermore, IFN-gamma is required to augment the radiotherapy-induced immune effect against the tumor.
 

Potential biochemical mediators of immune effects

The gut microbiota aid host digestion and generate a large repertoire of metabolites after defermentation of fiber. Short-chain fatty acids (SCFAs) constitute the major products of bacterial fermentation.

Acetic acid, propionic acid, and butyric acid represent 95% of total SCFAs present in the intestine. SCFAs are known to directly modulate cytokine production and dendritic cell function.

In their study, Dr. Facciabene and colleagues focused on butyric acid. Using mass spectroscopy, they demonstrated that vancomycin treatment reduces butyrate concentrations in tumor and tumor-draining lymph nodes by eradicating the major families of SCFA-producing Clostridia species.

To test whether supplementing butyrate could influence the synergy of the radiotherapy-vancomycin combination in vivo, the investigators added sodium butyrate to the mice’s drinking water when starting vancomycin treatment. The team then challenged the mice with B16-OVA tumors and treated them with radiotherapy.

In agreement with the group’s prior findings, vancomycin enhanced the tumor-inhibitory effects of radiotherapy, but dietary butyrate inhibited the benefit. The investigators found a significant decrease in the population of B16-OVA–presenting dendritic cells in the lymph nodes of mice receiving the supplemental butyrate.

Dr. Facciabene said these findings were supported by a recent publication. The authors observed that butyrate inhibited type I IFN expression in dendritic cells and radiotherapy-induced, tumor-specific cytotoxic T-cell immune responses without directly protecting tumor cells from the cytotoxic effects of radiotherapy.
 

Wide-ranging implications

Overall, Dr. Facciabene’s research has shown that:

• Vancomycin significantly enhances the tumor inhibitory effect of targeted radiation, including abscopal effects.
• The synergistic effects are dependent upon IFN-gamma and CD8+ cells.
• Depletion of some gut microbiome species increases antigen presentation by dendritic cells. This is mediated by SCFAs produced by certain bacterial families.
• There are promising new strategies to improve responses to radiotherapy, including targeting gut microbiota.

A clinical trial (NCT03546829) of vancomycin plus stereotactic body radiation in patients with locally advanced non–small cell lung cancer has been launched to investigate these findings further. Early data analysis has shown a significant impact of vancomycin on several species of gut microbiota, according to Dr. Facciabene.

Revolutionary results from immune-targeted therapy in the recent past have highlighted the important role the immune system can play in fighting cancer. Still, up to one-third of cancer patients fail to respond to overtly immune-targeted therapy.

The ability to inhibit cancer cells from evading immune surveillance by using new adjuvants – including those acting on non-traditional targets like gut microbiota – could herald the next major advances in cancer therapy. During his presentation, Dr. Facciabene gave participants an enticing hint of what could be coming for cancer patients in the years ahead.

Dr. Facciabene reported having no relevant disclosures.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers, as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

Research suggests certain gut bacteria can reduce the efficacy of radiotherapy against cancers, but targeting those bacteria with vancomycin can reverse this effect.

Andrea Facciabene, PhD, of the University of Pennsylvania, Philadelphia, and colleagues conducted a preclinical study in which vancomycin enhanced the efficacy of radiotherapy against melanoma and lung cancer. Now, researchers are conducting a clinical trial to determine if vancomycin can have the same effect in patients with non–small cell lung cancer.

Dr. Facciabene reviewed this research at the AACR Virtual Special Conference: Radiation Science and Medicine.

According to Dr. Facciabene, “gut microbiota” includes the more than 1,000 different strains of bacteria living in human intestines. He indicated that the average human has 10 times more bacteria than cells in the body and 150 times more genes in the gut microbiome than in the human genome.

In healthy individuals, the gut microbiota play a key role in intestinal function and digestive processes, modulation of hormones and vitamin secretion, energy extraction from food, and development and maintenance of a balanced immune system.

“Dysbiosis” is the term applied to a change in the composition, diversity, or metabolites of the microbiome from a healthy pattern to one associated with disease. Antibiotic therapy is a classic cause of dysbiosis, and dysbiosis has been implicated in a variety of inflammatory diseases.

The mechanisms by which the gut microbiome could influence systemic immunity is not known but is relevant to cancer therapy response. Augmenting the frequency and durability of response to immune-targeted treatments – potentially by manipulating the influence of gut microbiota on the immune system – could be highly impactful.
 

Gut microbiota and radiation-induced cell death

Immunogenic cell death – a process by which tumors die and release their intracellular molecular contents – is one of the mechanisms by which radiotherapy kills cancer cells.

Tumor cells succumbing to immunogenic cell death stimulate antigen presenting cells, such as dendritic cells, that engulf tumor antigens and cross-present them to CD8+ cytotoxic T lymphocytes. This process culminates in the generation of a specific immune response capable of killing the malignant cells in the irradiated area, but it also impacts distant nonirradiated tumors – an abscopal effect.

Dr. Facciabene and colleagues hypothesized that alterations of the gut microbiota could have an impact on the effect of radiotherapy. To investigate this, they studied mouse models of melanoma.

The team allowed B16-OVA tumors to grow for 9-12 days, then delivered a single dose of radiotherapy (21 Gy) to one – but not all – tumors. Simultaneously with the delivery of radiotherapy, the investigators started some animals on oral vancomycin. The team chose vancomycin because its effects are localized and impact the gut microbiota directly, without any known systemic effects.

Results showed that vancomycin significantly augmented the impact of radiotherapy in the irradiated area and was associated with regression of remote tumors.

The effects of the combination treatment on tumor volume were significantly greater than the effects of either treatment alone. Since manipulation of the gut microbiome potentiated radiotherapy effects both locally and distantly, the investigators concluded that immunogenic cell death may be involved in both the local and abscopal effects of radiotherapy.

When the experiment was repeated with a lung tumor model, similar findings were observed.
 

Involvement of cytotoxic T cells and interferon-gamma

Dr. Facciabene and colleagues found that the irradiated and unirradiated B16 OVA melanoma tumors treated with the radiotherapy-vancomycin combination were infiltrated by CD3+ and CD8+ T cells.

The investigators selectively depleted CD8+ T cells by pretreating the mice with an anti-CD8 monoclonal antibody. Depletion of CD8+ cells prior to administering radiotherapy plus vancomycin abrogated the antitumor effects of the combination treatment, demonstrating that the CD8+ T cells were required.

To characterize the antigen specificity of the tumor-infiltrating CD8+ T cells, Dr. Facciabene and colleagues used OVA MHC class 1 tetramer. Tumors from mice treated with vancomycin alone, radiotherapy alone, or the combination were dissected. Individual dendritic cells were assayed for OVA tetramer by flow cytometry.

The investigators found that tumors from mice treated with radiotherapy plus vancomycin had a significantly higher number of OVA-specific CD8+ T cells, in comparison with untreated tumors or tumors treated with either vancomycin alone or radiotherapy alone. Since antibody that impaired recognition of MHC class I peptides by T cells ablated the effect, it was clear that antigen recognition was vital.

Interferon-gamma (IFN-gamma) is known to play a critical role in both differentiation and effector functions of CD8+ cytolytic T cells in the antitumor immune response. To determine whether IFN-gamma is involved in the antitumor effects of the radiotherapy-vancomycin combination, the investigators measured intratumoral expression of IFN-gamma in the tumors 5 days after radiotherapy.

IFN-gamma messenger RNA expression levels were significantly elevated in the combination treatment group when compared with either treatment alone. In B16-OVA melanoma–challenged knockout mice, the enhancement of the radiotherapy effects by vancomycin was ablated.

The investigators concluded that vancomycin remodels the tumor microenvironment and increases the functionality of tumor-infiltrating, tumor-specific, CD8+ T cells. Furthermore, IFN-gamma is required to augment the radiotherapy-induced immune effect against the tumor.
 

Potential biochemical mediators of immune effects

The gut microbiota aid host digestion and generate a large repertoire of metabolites after defermentation of fiber. Short-chain fatty acids (SCFAs) constitute the major products of bacterial fermentation.

Acetic acid, propionic acid, and butyric acid represent 95% of total SCFAs present in the intestine. SCFAs are known to directly modulate cytokine production and dendritic cell function.

In their study, Dr. Facciabene and colleagues focused on butyric acid. Using mass spectroscopy, they demonstrated that vancomycin treatment reduces butyrate concentrations in tumor and tumor-draining lymph nodes by eradicating the major families of SCFA-producing Clostridia species.

To test whether supplementing butyrate could influence the synergy of the radiotherapy-vancomycin combination in vivo, the investigators added sodium butyrate to the mice’s drinking water when starting vancomycin treatment. The team then challenged the mice with B16-OVA tumors and treated them with radiotherapy.

In agreement with the group’s prior findings, vancomycin enhanced the tumor-inhibitory effects of radiotherapy, but dietary butyrate inhibited the benefit. The investigators found a significant decrease in the population of B16-OVA–presenting dendritic cells in the lymph nodes of mice receiving the supplemental butyrate.

Dr. Facciabene said these findings were supported by a recent publication. The authors observed that butyrate inhibited type I IFN expression in dendritic cells and radiotherapy-induced, tumor-specific cytotoxic T-cell immune responses without directly protecting tumor cells from the cytotoxic effects of radiotherapy.
 

Wide-ranging implications

Overall, Dr. Facciabene’s research has shown that:

• Vancomycin significantly enhances the tumor inhibitory effect of targeted radiation, including abscopal effects.
• The synergistic effects are dependent upon IFN-gamma and CD8+ cells.
• Depletion of some gut microbiome species increases antigen presentation by dendritic cells. This is mediated by SCFAs produced by certain bacterial families.
• There are promising new strategies to improve responses to radiotherapy, including targeting gut microbiota.

A clinical trial (NCT03546829) of vancomycin plus stereotactic body radiation in patients with locally advanced non–small cell lung cancer has been launched to investigate these findings further. Early data analysis has shown a significant impact of vancomycin on several species of gut microbiota, according to Dr. Facciabene.

Revolutionary results from immune-targeted therapy in the recent past have highlighted the important role the immune system can play in fighting cancer. Still, up to one-third of cancer patients fail to respond to overtly immune-targeted therapy.

The ability to inhibit cancer cells from evading immune surveillance by using new adjuvants – including those acting on non-traditional targets like gut microbiota – could herald the next major advances in cancer therapy. During his presentation, Dr. Facciabene gave participants an enticing hint of what could be coming for cancer patients in the years ahead.

Dr. Facciabene reported having no relevant disclosures.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers, as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.