Dermatology

SAN DIEGO – Pilonidal disease – a chronic inflammatory condition that can trigger the formation of cysts and sinuses in the superior portion of the intragluteal cleft or the sacrococcygeal area – remains challenging to manage, but mounting evidence supports the use of lasers to enhance treatment success.

“Draining sinuses or acute abscesses are usually associated with an underlying cyst and associated granulation tissue, fibrosis, and tufts of hair,” Catherine M. DiGiorgio, MD, said at the annual conference of the American Society for Laser Medicine and Surgery. “This is why laser hair removal can help with the treatment of these patients.”

The suspected etiology is a foreign body reaction to the entrapped hairs, which are found in the sinuses in about 75% of cases. “The treatment for that is surgery,” said Dr. DiGiorgio, a laser and cosmetic dermatologist in Boston. Laser hair reduction decreases the recurrence of cyst formation and drainage, and is usually covered by insurance, she noted.
 

Supportive evidence

In a comparative study, French researchers retrospectively reviewed the efficacy of laser hair removal after surgery in reducing recurrence rate of pilonidal cysts, versus surgery alone. Of the 41 study participants, 12 had laser hair removal plus surgery and 29 had surgery alone. The rate of cyst recurrence was significantly lower in the laser hair removal plus surgery group, compared with the surgery only group (8.3% vs. 51.7%, respectively; P < .001).

In another study, researchers from the United Kingdom and The Johns Hopkins Hospital, Baltimore, evaluated the use of the long-pulsed Alexandrite laser in 19 patients with recurrent pilonidal disease who had undergone multiple surgeries.They were treated with the laser for hair removal in the sinus area, requiring 4-12 sessions. The researchers found that 84.2% of patients had a reduction of hair density to less than 5 hairs/cm², while 15.8% had a reduction of hair density to 5-10 hairs/cm^2. They also noted a statistically significant increase in disease-free time in the laser-treated group compared with those treated with surgical management only (P < .01).
 

Lasers for pseudofolliculitis barbae, HS

Lasers also play a significant role in the treatment of pseudofolliculitis barbae, a chronic, inflammatory disease that primarily affects the bearded area of men with thick hairs, usually those with a darker Fitzpatrick skin type. This can also occur in women, particularly those with polycystic ovary syndrome, Dr. DiGiorgio said.

In people with pseudofolliculitis barbae, the hair follicle is positioned at an acute angle to the skin surface and the sharp end of shaved hair reenters the skin, which results in the formation of pustules, papules, secondary infection, and keloids. Treatment involves a variety of medical therapies including retinoids, benzoyl peroxide, antibiotics, and keratolytics, “but laser hair removal is the best way to get rid of this issue, and results in permanent reduction,” she said. “When treating male patients with laser hair removal in the bearded area, you have to tell them that they won’t be able to grow a beard going forward. Most of them are okay with that.”

A 2002 study, led by E. Victor Ross, MD, of the Naval Medical Center, San Diego, evaluated treatment of pseudofolliculitis barbae in patients with skin types IV, V, and VI with a long-pulsed Nd:YAG laser. For the first phase of the study, the investigators tested epidermal tolerance on the thighs of 37 patients and determined that the laser was safe and effective. For the second phase 2 weeks later, they treated a 15x15-mm submental area with the highest fluence tolerated in phase 1 of the trial and used an adjacent site as the control.

After 90 days, the mean papule count was 6.95 for the control site compared with 1 for the laser-treated site. The researchers observed that miniaturization and elimination of hair shafts resulted in decreased inflamed papules. “We know that this works,” Dr. DiGiorgio said.

In another study from investigators at the Naval Medical Center, San Diego, 22 patients with skin types IV, V, and VI who had pseudofolliculitis barbae underwent 5 weekly treatments with a 1,064 nm Nd:YAG laser. Topical anesthesia was not used, and 10 evaluators used a Global Assessment Scale (GAS) to assess treatment success from photos taken at baseline and at 4 weeks. At 4 weeks, 11 patients demonstrated 83% improvement on the GAS (P < .01), the investigators reported.

Laser and energy-based treatments can also be used to treat hidradenitis suppurativa (HS), a chronic condition that affects apocrine gland–bearing skin. “The hypothesized pathogenesis is that it’s an inflammatory disorder of the hair follicle, where the follicle rupture introduces its contents into the surrounding dermis,” Dr. DiGiorgio said. “The skin reacts with a chemotactic response and abscess formation. This results in inflammatory nodules and sterile abscesses, which can lead to sinus tracts and hypertrophic scars and chronic drainage, which can be foul-smelling. This frequently leads to depression and psychological distress for the patients.”

Possible laser and energy-based treatments for HS include follicular destruction with the Nd:YAG laser, the diode laser, the Alexandrite laser, microwave technology, or intense pulsed light, she said. Microwave technology or radiofrequency can be used for sweat gland destruction, while CO₂ lasers can be used to debulk tissue, and the ablative fractional CO₂ laser can be used to reduce scarring and improve range of motion.

In a prospective, randomized, intraindividual comparative trial conducted at eight centers in France, researchers evaluated the use of a long-pulsed Nd:YAG laser to treat 36 patients with mild to moderate HS; 27 had inguinal disease and 9 had axillary disease. They received four laser treatments at 6-week intervals; laser settings varied depending on the patient skin type.

At 1 month, there was a significant reduction in the number of inflammatory lesions on the areas treated with lasers, compared to the untreated areas, but the difference was not significant at 3 months. There was no significant difference in the number of flares between the treated and untreated sites at 1 or 3 months.

In a separate study, researchers found that the Nd:YAG laser in combination with topical benzoyl peroxide and clindamycin was significantly more effective than topical benzoyl peroxide and clindamycin alone for the treatment of HS in 22 patients with Hurley stage II disease. The patients received monthly treatments for 4 months and were followed up 2 months after the last treatment; the Hidradenitis Suppurativa Area and Severity Index was used to measure treatment response.

Statistically significant improvements were observed in the inguinal and axillary areas but not in the inframammary areas. Most patients (90%) reported less frequent breakouts while 10% reported no change. “In addition, 92% of subjects felt that the use of laser was more effective than other treatments they had tried but 8% stated it was equal to the other treatments they had tried,” said Dr. DiGiorgio, who was not affiliated with the study. “The researchers noted continued improvement with subsequent laser sessions,” she added.

According to 2019 guidelines from the United States and Canadian HS Foundations on the management of HS – in the section on light, laser, and energy sources – an Nd:YAG laser is recommended in patients with Hurley stage II or III disease on the basis of randomized, controlled trials and case series data, and in patients with Hurley stage I disease based on expert consensus. “Other wavelengths that are used for follicular destruction are recommended on the basis of lower-quality evidence,” the recommendations state.

The guidelines also state that CO₂ laser excision “is recommended in patients with Hurley stage II or III disease with fibrotic sinus tracts” while “external beam radiation and PDT have a limited role in the management of patients with HS.”

Dr. DiGiorgio reported having no relevant disclosures.

SAN DIEGO – Pilonidal disease – a chronic inflammatory condition that can trigger the formation of cysts and sinuses in the superior portion of the intragluteal cleft or the sacrococcygeal area – remains challenging to manage, but mounting evidence supports the use of lasers to enhance treatment success.

“Draining sinuses or acute abscesses are usually associated with an underlying cyst and associated granulation tissue, fibrosis, and tufts of hair,” Catherine M. DiGiorgio, MD, said at the annual conference of the American Society for Laser Medicine and Surgery. “This is why laser hair removal can help with the treatment of these patients.”

The suspected etiology is a foreign body reaction to the entrapped hairs, which are found in the sinuses in about 75% of cases. “The treatment for that is surgery,” said Dr. DiGiorgio, a laser and cosmetic dermatologist in Boston. Laser hair reduction decreases the recurrence of cyst formation and drainage, and is usually covered by insurance, she noted.
 

Supportive evidence

In a comparative study, French researchers retrospectively reviewed the efficacy of laser hair removal after surgery in reducing recurrence rate of pilonidal cysts, versus surgery alone. Of the 41 study participants, 12 had laser hair removal plus surgery and 29 had surgery alone. The rate of cyst recurrence was significantly lower in the laser hair removal plus surgery group, compared with the surgery only group (8.3% vs. 51.7%, respectively; P < .001).

In another study, researchers from the United Kingdom and The Johns Hopkins Hospital, Baltimore, evaluated the use of the long-pulsed Alexandrite laser in 19 patients with recurrent pilonidal disease who had undergone multiple surgeries.They were treated with the laser for hair removal in the sinus area, requiring 4-12 sessions. The researchers found that 84.2% of patients had a reduction of hair density to less than 5 hairs/cm², while 15.8% had a reduction of hair density to 5-10 hairs/cm^2. They also noted a statistically significant increase in disease-free time in the laser-treated group compared with those treated with surgical management only (P < .01).
 

Lasers for pseudofolliculitis barbae, HS

Lasers also play a significant role in the treatment of pseudofolliculitis barbae, a chronic, inflammatory disease that primarily affects the bearded area of men with thick hairs, usually those with a darker Fitzpatrick skin type. This can also occur in women, particularly those with polycystic ovary syndrome, Dr. DiGiorgio said.

In people with pseudofolliculitis barbae, the hair follicle is positioned at an acute angle to the skin surface and the sharp end of shaved hair reenters the skin, which results in the formation of pustules, papules, secondary infection, and keloids. Treatment involves a variety of medical therapies including retinoids, benzoyl peroxide, antibiotics, and keratolytics, “but laser hair removal is the best way to get rid of this issue, and results in permanent reduction,” she said. “When treating male patients with laser hair removal in the bearded area, you have to tell them that they won’t be able to grow a beard going forward. Most of them are okay with that.”

A 2002 study, led by E. Victor Ross, MD, of the Naval Medical Center, San Diego, evaluated treatment of pseudofolliculitis barbae in patients with skin types IV, V, and VI with a long-pulsed Nd:YAG laser. For the first phase of the study, the investigators tested epidermal tolerance on the thighs of 37 patients and determined that the laser was safe and effective. For the second phase 2 weeks later, they treated a 15x15-mm submental area with the highest fluence tolerated in phase 1 of the trial and used an adjacent site as the control.

After 90 days, the mean papule count was 6.95 for the control site compared with 1 for the laser-treated site. The researchers observed that miniaturization and elimination of hair shafts resulted in decreased inflamed papules. “We know that this works,” Dr. DiGiorgio said.

In another study from investigators at the Naval Medical Center, San Diego, 22 patients with skin types IV, V, and VI who had pseudofolliculitis barbae underwent 5 weekly treatments with a 1,064 nm Nd:YAG laser. Topical anesthesia was not used, and 10 evaluators used a Global Assessment Scale (GAS) to assess treatment success from photos taken at baseline and at 4 weeks. At 4 weeks, 11 patients demonstrated 83% improvement on the GAS (P < .01), the investigators reported.

Laser and energy-based treatments can also be used to treat hidradenitis suppurativa (HS), a chronic condition that affects apocrine gland–bearing skin. “The hypothesized pathogenesis is that it’s an inflammatory disorder of the hair follicle, where the follicle rupture introduces its contents into the surrounding dermis,” Dr. DiGiorgio said. “The skin reacts with a chemotactic response and abscess formation. This results in inflammatory nodules and sterile abscesses, which can lead to sinus tracts and hypertrophic scars and chronic drainage, which can be foul-smelling. This frequently leads to depression and psychological distress for the patients.”

Possible laser and energy-based treatments for HS include follicular destruction with the Nd:YAG laser, the diode laser, the Alexandrite laser, microwave technology, or intense pulsed light, she said. Microwave technology or radiofrequency can be used for sweat gland destruction, while CO₂ lasers can be used to debulk tissue, and the ablative fractional CO₂ laser can be used to reduce scarring and improve range of motion.

In a prospective, randomized, intraindividual comparative trial conducted at eight centers in France, researchers evaluated the use of a long-pulsed Nd:YAG laser to treat 36 patients with mild to moderate HS; 27 had inguinal disease and 9 had axillary disease. They received four laser treatments at 6-week intervals; laser settings varied depending on the patient skin type.

At 1 month, there was a significant reduction in the number of inflammatory lesions on the areas treated with lasers, compared to the untreated areas, but the difference was not significant at 3 months. There was no significant difference in the number of flares between the treated and untreated sites at 1 or 3 months.

In a separate study, researchers found that the Nd:YAG laser in combination with topical benzoyl peroxide and clindamycin was significantly more effective than topical benzoyl peroxide and clindamycin alone for the treatment of HS in 22 patients with Hurley stage II disease. The patients received monthly treatments for 4 months and were followed up 2 months after the last treatment; the Hidradenitis Suppurativa Area and Severity Index was used to measure treatment response.

Statistically significant improvements were observed in the inguinal and axillary areas but not in the inframammary areas. Most patients (90%) reported less frequent breakouts while 10% reported no change. “In addition, 92% of subjects felt that the use of laser was more effective than other treatments they had tried but 8% stated it was equal to the other treatments they had tried,” said Dr. DiGiorgio, who was not affiliated with the study. “The researchers noted continued improvement with subsequent laser sessions,” she added.

According to 2019 guidelines from the United States and Canadian HS Foundations on the management of HS – in the section on light, laser, and energy sources – an Nd:YAG laser is recommended in patients with Hurley stage II or III disease on the basis of randomized, controlled trials and case series data, and in patients with Hurley stage I disease based on expert consensus. “Other wavelengths that are used for follicular destruction are recommended on the basis of lower-quality evidence,” the recommendations state.

The guidelines also state that CO₂ laser excision “is recommended in patients with Hurley stage II or III disease with fibrotic sinus tracts” while “external beam radiation and PDT have a limited role in the management of patients with HS.”

Dr. DiGiorgio reported having no relevant disclosures.

SAN DIEGO – Pilonidal disease – a chronic inflammatory condition that can trigger the formation of cysts and sinuses in the superior portion of the intragluteal cleft or the sacrococcygeal area – remains challenging to manage, but mounting evidence supports the use of lasers to enhance treatment success.

“Draining sinuses or acute abscesses are usually associated with an underlying cyst and associated granulation tissue, fibrosis, and tufts of hair,” Catherine M. DiGiorgio, MD, said at the annual conference of the American Society for Laser Medicine and Surgery. “This is why laser hair removal can help with the treatment of these patients.”

The suspected etiology is a foreign body reaction to the entrapped hairs, which are found in the sinuses in about 75% of cases. “The treatment for that is surgery,” said Dr. DiGiorgio, a laser and cosmetic dermatologist in Boston. Laser hair reduction decreases the recurrence of cyst formation and drainage, and is usually covered by insurance, she noted.
 

Supportive evidence

In a comparative study, French researchers retrospectively reviewed the efficacy of laser hair removal after surgery in reducing recurrence rate of pilonidal cysts, versus surgery alone. Of the 41 study participants, 12 had laser hair removal plus surgery and 29 had surgery alone. The rate of cyst recurrence was significantly lower in the laser hair removal plus surgery group, compared with the surgery only group (8.3% vs. 51.7%, respectively; P < .001).

In another study, researchers from the United Kingdom and The Johns Hopkins Hospital, Baltimore, evaluated the use of the long-pulsed Alexandrite laser in 19 patients with recurrent pilonidal disease who had undergone multiple surgeries.They were treated with the laser for hair removal in the sinus area, requiring 4-12 sessions. The researchers found that 84.2% of patients had a reduction of hair density to less than 5 hairs/cm², while 15.8% had a reduction of hair density to 5-10 hairs/cm^2. They also noted a statistically significant increase in disease-free time in the laser-treated group compared with those treated with surgical management only (P < .01).
 

Lasers for pseudofolliculitis barbae, HS

Lasers also play a significant role in the treatment of pseudofolliculitis barbae, a chronic, inflammatory disease that primarily affects the bearded area of men with thick hairs, usually those with a darker Fitzpatrick skin type. This can also occur in women, particularly those with polycystic ovary syndrome, Dr. DiGiorgio said.

In people with pseudofolliculitis barbae, the hair follicle is positioned at an acute angle to the skin surface and the sharp end of shaved hair reenters the skin, which results in the formation of pustules, papules, secondary infection, and keloids. Treatment involves a variety of medical therapies including retinoids, benzoyl peroxide, antibiotics, and keratolytics, “but laser hair removal is the best way to get rid of this issue, and results in permanent reduction,” she said. “When treating male patients with laser hair removal in the bearded area, you have to tell them that they won’t be able to grow a beard going forward. Most of them are okay with that.”

A 2002 study, led by E. Victor Ross, MD, of the Naval Medical Center, San Diego, evaluated treatment of pseudofolliculitis barbae in patients with skin types IV, V, and VI with a long-pulsed Nd:YAG laser. For the first phase of the study, the investigators tested epidermal tolerance on the thighs of 37 patients and determined that the laser was safe and effective. For the second phase 2 weeks later, they treated a 15x15-mm submental area with the highest fluence tolerated in phase 1 of the trial and used an adjacent site as the control.

After 90 days, the mean papule count was 6.95 for the control site compared with 1 for the laser-treated site. The researchers observed that miniaturization and elimination of hair shafts resulted in decreased inflamed papules. “We know that this works,” Dr. DiGiorgio said.

In another study from investigators at the Naval Medical Center, San Diego, 22 patients with skin types IV, V, and VI who had pseudofolliculitis barbae underwent 5 weekly treatments with a 1,064 nm Nd:YAG laser. Topical anesthesia was not used, and 10 evaluators used a Global Assessment Scale (GAS) to assess treatment success from photos taken at baseline and at 4 weeks. At 4 weeks, 11 patients demonstrated 83% improvement on the GAS (P < .01), the investigators reported.

Laser and energy-based treatments can also be used to treat hidradenitis suppurativa (HS), a chronic condition that affects apocrine gland–bearing skin. “The hypothesized pathogenesis is that it’s an inflammatory disorder of the hair follicle, where the follicle rupture introduces its contents into the surrounding dermis,” Dr. DiGiorgio said. “The skin reacts with a chemotactic response and abscess formation. This results in inflammatory nodules and sterile abscesses, which can lead to sinus tracts and hypertrophic scars and chronic drainage, which can be foul-smelling. This frequently leads to depression and psychological distress for the patients.”

Possible laser and energy-based treatments for HS include follicular destruction with the Nd:YAG laser, the diode laser, the Alexandrite laser, microwave technology, or intense pulsed light, she said. Microwave technology or radiofrequency can be used for sweat gland destruction, while CO₂ lasers can be used to debulk tissue, and the ablative fractional CO₂ laser can be used to reduce scarring and improve range of motion.

In a prospective, randomized, intraindividual comparative trial conducted at eight centers in France, researchers evaluated the use of a long-pulsed Nd:YAG laser to treat 36 patients with mild to moderate HS; 27 had inguinal disease and 9 had axillary disease. They received four laser treatments at 6-week intervals; laser settings varied depending on the patient skin type.

At 1 month, there was a significant reduction in the number of inflammatory lesions on the areas treated with lasers, compared to the untreated areas, but the difference was not significant at 3 months. There was no significant difference in the number of flares between the treated and untreated sites at 1 or 3 months.

In a separate study, researchers found that the Nd:YAG laser in combination with topical benzoyl peroxide and clindamycin was significantly more effective than topical benzoyl peroxide and clindamycin alone for the treatment of HS in 22 patients with Hurley stage II disease. The patients received monthly treatments for 4 months and were followed up 2 months after the last treatment; the Hidradenitis Suppurativa Area and Severity Index was used to measure treatment response.

Statistically significant improvements were observed in the inguinal and axillary areas but not in the inframammary areas. Most patients (90%) reported less frequent breakouts while 10% reported no change. “In addition, 92% of subjects felt that the use of laser was more effective than other treatments they had tried but 8% stated it was equal to the other treatments they had tried,” said Dr. DiGiorgio, who was not affiliated with the study. “The researchers noted continued improvement with subsequent laser sessions,” she added.

According to 2019 guidelines from the United States and Canadian HS Foundations on the management of HS – in the section on light, laser, and energy sources – an Nd:YAG laser is recommended in patients with Hurley stage II or III disease on the basis of randomized, controlled trials and case series data, and in patients with Hurley stage I disease based on expert consensus. “Other wavelengths that are used for follicular destruction are recommended on the basis of lower-quality evidence,” the recommendations state.

The guidelines also state that CO₂ laser excision “is recommended in patients with Hurley stage II or III disease with fibrotic sinus tracts” while “external beam radiation and PDT have a limited role in the management of patients with HS.”

Dr. DiGiorgio reported having no relevant disclosures.

SAN DIEGO – Using the ablative fractional laser and other wounding therapies to destroy actinic keratoses (AKs) as a way to prevent skin cancer appears to spark other beneficial effects on skin biology, according to Molly Wanner, MD, MBA.

As a case in point, Dr. Wanner discussed the results of a trial of 48 people over aged 60 years with actinic damage, who received ablative fractional laser treatment on one arm and no treatment on the other arm, which served as the control. At 24 months, only two nonmelanoma skin cancers (NMSCs) developed on the treated arms, compared with 26 on the treated arms.

“What I find interesting is that the treated arm did not develop basal cell carcinoma, only squamous cell carcinoma,” she said at the annual meeting of the American Society for Laser Medicine and Surgery. “It appears that this is working through more than just treatment of the AK precursor lesions, for which fractional lasers are cleared for use. It appears to impact both types of NMSCs.”

The ablative fractional laser and other wounding therapies can modulate a response to UV light – a process that naturally diminishes with age, according to Dr. Wanner, a dermatologist at Massachusetts General Hospital’s Dermatology Laser and Cosmetic Center in Boston. “This ability to repair DNA is actually modulated by insulin-like growth factor 1,” she said. “IGF-1 is produced by papillary dermal fibroblasts and communicates with keratinocytes. If keratinocytes are exposed to UV light and there is no IGF-1 around, you get a mutated cell, and that keeps spreading, and you could potentially get a skin cancer.”

On the other hand, she continued, if IGF-1 is injected around the keratinocytes, they are able to respond. “Keratinocytes, which are the most superficial layer of the skin, are really active,” noted Dr. Wanner, who is also an assistant professor of dermatology at Harvard Medical School, Boston. “They’re dividing and replicating, whereas fibroblasts are more non-proliferative and more long-lived. They stick around for a long time. I think of them as the adults in the room, giving these new keratinocytes direction.”

In a review of wounding therapies for the prevention of photocarcinogenesis, she and her coauthors noted that IGF-1 increases nucleotide excision repair of damaged DNA, promotes checkpoint signaling and suppression of DNA synthesis, favors specialized polymerases that are better able to repair DNA damage, and enhances p53-dependent transcriptional responses to DNA damage.

“Older fibroblasts produce less IGF-1 and lead to a situation where keratinocytes can grow unchecked,” she said. “We can use fractional laser to help with this. Fractional laser increases fibroblast production and decreases senescent fibroblasts.”

In a 2017 review on the impact of age and IGF-1 on DNA damage responses in UV-irradiated skin, the authors noted the high levels of IGF-1 in the skin of younger individuals and lower levels in the skin of their older counterparts.

“But once older skin has been treated with either dermabrasion or fractional laser, the levels of IGF-1 are restored to that of a young adult,” Dr. Wanner said. “The restoration of IGF-1 then restores that level of appropriate response to UV light. So, what’s interesting is that fractional lasers treat more than a fraction [of skin]. Fractional lasers were developed to have an easier way to improve wound healing by leaving the skin intact around these columns [of treated skin]. It turns out that treatment of these columns of skin does not just impact the cells in that area. There is a true global effect that’s allowing us to almost normalize skin.”

Dr. Wanner now thinks of fractional lasers as stimulating a laser-cell biology interaction, not just a laser-tissue interaction. “It’s incredible that we can use these photons to not only impact the tissue itself but how the cells actually respond,” she said. “What’s going to be interesting for us in the next few years is to look at how lasers impact our cellular biology. How can we harness it to help our patients?”

She and her colleagues are conducting a trial of different wounding modalities to assess their impact on IGF-1. “Does depth matter? Does density matter? Does the wavelength matter?” she asked. “The bottom line is, it turns out that when the skin looks healthier, it is healthier. Cosmetic treatments can impact medical outcomes.”

Dr. Wanner disclosed that she is a consultant and advisor to Nu Skin. She has also received research funding and equipment from Solta.

SAN DIEGO – Using the ablative fractional laser and other wounding therapies to destroy actinic keratoses (AKs) as a way to prevent skin cancer appears to spark other beneficial effects on skin biology, according to Molly Wanner, MD, MBA.

As a case in point, Dr. Wanner discussed the results of a trial of 48 people over aged 60 years with actinic damage, who received ablative fractional laser treatment on one arm and no treatment on the other arm, which served as the control. At 24 months, only two nonmelanoma skin cancers (NMSCs) developed on the treated arms, compared with 26 on the treated arms.

“What I find interesting is that the treated arm did not develop basal cell carcinoma, only squamous cell carcinoma,” she said at the annual meeting of the American Society for Laser Medicine and Surgery. “It appears that this is working through more than just treatment of the AK precursor lesions, for which fractional lasers are cleared for use. It appears to impact both types of NMSCs.”

The ablative fractional laser and other wounding therapies can modulate a response to UV light – a process that naturally diminishes with age, according to Dr. Wanner, a dermatologist at Massachusetts General Hospital’s Dermatology Laser and Cosmetic Center in Boston. “This ability to repair DNA is actually modulated by insulin-like growth factor 1,” she said. “IGF-1 is produced by papillary dermal fibroblasts and communicates with keratinocytes. If keratinocytes are exposed to UV light and there is no IGF-1 around, you get a mutated cell, and that keeps spreading, and you could potentially get a skin cancer.”

On the other hand, she continued, if IGF-1 is injected around the keratinocytes, they are able to respond. “Keratinocytes, which are the most superficial layer of the skin, are really active,” noted Dr. Wanner, who is also an assistant professor of dermatology at Harvard Medical School, Boston. “They’re dividing and replicating, whereas fibroblasts are more non-proliferative and more long-lived. They stick around for a long time. I think of them as the adults in the room, giving these new keratinocytes direction.”

In a review of wounding therapies for the prevention of photocarcinogenesis, she and her coauthors noted that IGF-1 increases nucleotide excision repair of damaged DNA, promotes checkpoint signaling and suppression of DNA synthesis, favors specialized polymerases that are better able to repair DNA damage, and enhances p53-dependent transcriptional responses to DNA damage.

“Older fibroblasts produce less IGF-1 and lead to a situation where keratinocytes can grow unchecked,” she said. “We can use fractional laser to help with this. Fractional laser increases fibroblast production and decreases senescent fibroblasts.”

In a 2017 review on the impact of age and IGF-1 on DNA damage responses in UV-irradiated skin, the authors noted the high levels of IGF-1 in the skin of younger individuals and lower levels in the skin of their older counterparts.

“But once older skin has been treated with either dermabrasion or fractional laser, the levels of IGF-1 are restored to that of a young adult,” Dr. Wanner said. “The restoration of IGF-1 then restores that level of appropriate response to UV light. So, what’s interesting is that fractional lasers treat more than a fraction [of skin]. Fractional lasers were developed to have an easier way to improve wound healing by leaving the skin intact around these columns [of treated skin]. It turns out that treatment of these columns of skin does not just impact the cells in that area. There is a true global effect that’s allowing us to almost normalize skin.”

Dr. Wanner now thinks of fractional lasers as stimulating a laser-cell biology interaction, not just a laser-tissue interaction. “It’s incredible that we can use these photons to not only impact the tissue itself but how the cells actually respond,” she said. “What’s going to be interesting for us in the next few years is to look at how lasers impact our cellular biology. How can we harness it to help our patients?”

She and her colleagues are conducting a trial of different wounding modalities to assess their impact on IGF-1. “Does depth matter? Does density matter? Does the wavelength matter?” she asked. “The bottom line is, it turns out that when the skin looks healthier, it is healthier. Cosmetic treatments can impact medical outcomes.”

Dr. Wanner disclosed that she is a consultant and advisor to Nu Skin. She has also received research funding and equipment from Solta.

SAN DIEGO – Using the ablative fractional laser and other wounding therapies to destroy actinic keratoses (AKs) as a way to prevent skin cancer appears to spark other beneficial effects on skin biology, according to Molly Wanner, MD, MBA.

As a case in point, Dr. Wanner discussed the results of a trial of 48 people over aged 60 years with actinic damage, who received ablative fractional laser treatment on one arm and no treatment on the other arm, which served as the control. At 24 months, only two nonmelanoma skin cancers (NMSCs) developed on the treated arms, compared with 26 on the treated arms.

“What I find interesting is that the treated arm did not develop basal cell carcinoma, only squamous cell carcinoma,” she said at the annual meeting of the American Society for Laser Medicine and Surgery. “It appears that this is working through more than just treatment of the AK precursor lesions, for which fractional lasers are cleared for use. It appears to impact both types of NMSCs.”

The ablative fractional laser and other wounding therapies can modulate a response to UV light – a process that naturally diminishes with age, according to Dr. Wanner, a dermatologist at Massachusetts General Hospital’s Dermatology Laser and Cosmetic Center in Boston. “This ability to repair DNA is actually modulated by insulin-like growth factor 1,” she said. “IGF-1 is produced by papillary dermal fibroblasts and communicates with keratinocytes. If keratinocytes are exposed to UV light and there is no IGF-1 around, you get a mutated cell, and that keeps spreading, and you could potentially get a skin cancer.”

On the other hand, she continued, if IGF-1 is injected around the keratinocytes, they are able to respond. “Keratinocytes, which are the most superficial layer of the skin, are really active,” noted Dr. Wanner, who is also an assistant professor of dermatology at Harvard Medical School, Boston. “They’re dividing and replicating, whereas fibroblasts are more non-proliferative and more long-lived. They stick around for a long time. I think of them as the adults in the room, giving these new keratinocytes direction.”

In a review of wounding therapies for the prevention of photocarcinogenesis, she and her coauthors noted that IGF-1 increases nucleotide excision repair of damaged DNA, promotes checkpoint signaling and suppression of DNA synthesis, favors specialized polymerases that are better able to repair DNA damage, and enhances p53-dependent transcriptional responses to DNA damage.

“Older fibroblasts produce less IGF-1 and lead to a situation where keratinocytes can grow unchecked,” she said. “We can use fractional laser to help with this. Fractional laser increases fibroblast production and decreases senescent fibroblasts.”

In a 2017 review on the impact of age and IGF-1 on DNA damage responses in UV-irradiated skin, the authors noted the high levels of IGF-1 in the skin of younger individuals and lower levels in the skin of their older counterparts.

“But once older skin has been treated with either dermabrasion or fractional laser, the levels of IGF-1 are restored to that of a young adult,” Dr. Wanner said. “The restoration of IGF-1 then restores that level of appropriate response to UV light. So, what’s interesting is that fractional lasers treat more than a fraction [of skin]. Fractional lasers were developed to have an easier way to improve wound healing by leaving the skin intact around these columns [of treated skin]. It turns out that treatment of these columns of skin does not just impact the cells in that area. There is a true global effect that’s allowing us to almost normalize skin.”

Dr. Wanner now thinks of fractional lasers as stimulating a laser-cell biology interaction, not just a laser-tissue interaction. “It’s incredible that we can use these photons to not only impact the tissue itself but how the cells actually respond,” she said. “What’s going to be interesting for us in the next few years is to look at how lasers impact our cellular biology. How can we harness it to help our patients?”

She and her colleagues are conducting a trial of different wounding modalities to assess their impact on IGF-1. “Does depth matter? Does density matter? Does the wavelength matter?” she asked. “The bottom line is, it turns out that when the skin looks healthier, it is healthier. Cosmetic treatments can impact medical outcomes.”

Dr. Wanner disclosed that she is a consultant and advisor to Nu Skin. She has also received research funding and equipment from Solta.

A limited association exists between the use of isotretinoin for severe acne and worsening of a patient’s baseline inflammatory bowel disease, results from a small retrospective study suggests.

“Early studies of isotretinoin for use in severe acne suggested the drug may serve as a trigger for new-onset inflammatory bowel disease (IBD),” researchers led by Christina G. Lopez, MD, of the Lewis Katz School of Medicine at Temple University, Philadelphia, wrote in an article published online , in the Journal of the American Academy of Dermatology. “While more recent studies have suggested no such causal relationship, little is known about the medication’s effect on patients with a preexisting IBD diagnosis.”

To investigate this topic further, the researchers identified 19 patients who were diagnosed with IBD and treated with isotretinoin between Jan. 1, 2006, and Jan. 1, 2020, at Mass General Brigham Hospitals, Boston. They determined severity of disease and degree of antecedent management of IBD by evaluating flaring two years prior to starting isotretinoin. The patients were considered to have a flare caused by isotretinoin if the IBD flare occurred during or up to 3 months following course completion.

The mean age of the 19 patients was 35 years, 26% were female, and 95% were White. Nearly half of the patients (42%) had ulcerative colitis, 37% had Crohn’s disease, and 21% had both. The researchers found that nine patients had flared two years before starting isotretinoin. Of these, five (56%) flared and four (44%) did not flare during treatment or within three months of completing the course of isotretinoin.

Of the 10 patients who did not flare two years before starting isotretinoin, seven (70%) did not flare during treatment and three (30%) flared during or within three months following completion of isotretinoin use. The researchers found no statistically significant association between isotretinoin use and flaring among patients with IBD (P = .76).

Dr. Lopez and her colleagues also assessed IBD maintenance therapy with respect to IBD flares in the study population. They observed no statistically significant association between the use of maintenance IBD therapy and the likelihood of having flares during isotretinoin treatment (P = .15).

“The results suggest limited association between isotretinoin and the worsening of a patient’s baseline IBD,” the authors concluded. They acknowledged certain limitations of the study, including its small sample size and retrospective design, and they called for larger and prospective studies to assess the relationship of IBD flaring in this population of patients.

Pooja Sodha, MD, director of the Center for Laser and Cosmetic Dermatology at George Washington University, Washington, who was asked to comment on the results, characterized the trial as “an important study highlighting how we continue to understand the safe use of isotretinoin in the IBD cohort.”

Isotretinoin, she added, “continues to be a highly important treatment for acne and in patients such as these where oral antibiotics are relatively contraindicated due to risk of exacerbating their bowel disease.” Such data are reassuring, “albeit future studies with larger patient pools are desirable,” she added. “Future studies could also help to elucidate if diet, smoking, sleep, exercise, and medication adherence are potential confounding factors along with whether the cumulative isotretinoin dose has any effect on IBD flares in those who are susceptible.”

Neither the researchers nor Dr. Sodha had financial conflicts. The other authors were from Brigham and Women’s Hospital, Harvard University, Boston, and the University of Massachusetts, Worcester.

A limited association exists between the use of isotretinoin for severe acne and worsening of a patient’s baseline inflammatory bowel disease, results from a small retrospective study suggests.

“Early studies of isotretinoin for use in severe acne suggested the drug may serve as a trigger for new-onset inflammatory bowel disease (IBD),” researchers led by Christina G. Lopez, MD, of the Lewis Katz School of Medicine at Temple University, Philadelphia, wrote in an article published online , in the Journal of the American Academy of Dermatology. “While more recent studies have suggested no such causal relationship, little is known about the medication’s effect on patients with a preexisting IBD diagnosis.”

To investigate this topic further, the researchers identified 19 patients who were diagnosed with IBD and treated with isotretinoin between Jan. 1, 2006, and Jan. 1, 2020, at Mass General Brigham Hospitals, Boston. They determined severity of disease and degree of antecedent management of IBD by evaluating flaring two years prior to starting isotretinoin. The patients were considered to have a flare caused by isotretinoin if the IBD flare occurred during or up to 3 months following course completion.

The mean age of the 19 patients was 35 years, 26% were female, and 95% were White. Nearly half of the patients (42%) had ulcerative colitis, 37% had Crohn’s disease, and 21% had both. The researchers found that nine patients had flared two years before starting isotretinoin. Of these, five (56%) flared and four (44%) did not flare during treatment or within three months of completing the course of isotretinoin.

Of the 10 patients who did not flare two years before starting isotretinoin, seven (70%) did not flare during treatment and three (30%) flared during or within three months following completion of isotretinoin use. The researchers found no statistically significant association between isotretinoin use and flaring among patients with IBD (P = .76).

Dr. Lopez and her colleagues also assessed IBD maintenance therapy with respect to IBD flares in the study population. They observed no statistically significant association between the use of maintenance IBD therapy and the likelihood of having flares during isotretinoin treatment (P = .15).

“The results suggest limited association between isotretinoin and the worsening of a patient’s baseline IBD,” the authors concluded. They acknowledged certain limitations of the study, including its small sample size and retrospective design, and they called for larger and prospective studies to assess the relationship of IBD flaring in this population of patients.

Pooja Sodha, MD, director of the Center for Laser and Cosmetic Dermatology at George Washington University, Washington, who was asked to comment on the results, characterized the trial as “an important study highlighting how we continue to understand the safe use of isotretinoin in the IBD cohort.”

Isotretinoin, she added, “continues to be a highly important treatment for acne and in patients such as these where oral antibiotics are relatively contraindicated due to risk of exacerbating their bowel disease.” Such data are reassuring, “albeit future studies with larger patient pools are desirable,” she added. “Future studies could also help to elucidate if diet, smoking, sleep, exercise, and medication adherence are potential confounding factors along with whether the cumulative isotretinoin dose has any effect on IBD flares in those who are susceptible.”

Neither the researchers nor Dr. Sodha had financial conflicts. The other authors were from Brigham and Women’s Hospital, Harvard University, Boston, and the University of Massachusetts, Worcester.

A limited association exists between the use of isotretinoin for severe acne and worsening of a patient’s baseline inflammatory bowel disease, results from a small retrospective study suggests.

“Early studies of isotretinoin for use in severe acne suggested the drug may serve as a trigger for new-onset inflammatory bowel disease (IBD),” researchers led by Christina G. Lopez, MD, of the Lewis Katz School of Medicine at Temple University, Philadelphia, wrote in an article published online , in the Journal of the American Academy of Dermatology. “While more recent studies have suggested no such causal relationship, little is known about the medication’s effect on patients with a preexisting IBD diagnosis.”

To investigate this topic further, the researchers identified 19 patients who were diagnosed with IBD and treated with isotretinoin between Jan. 1, 2006, and Jan. 1, 2020, at Mass General Brigham Hospitals, Boston. They determined severity of disease and degree of antecedent management of IBD by evaluating flaring two years prior to starting isotretinoin. The patients were considered to have a flare caused by isotretinoin if the IBD flare occurred during or up to 3 months following course completion.

The mean age of the 19 patients was 35 years, 26% were female, and 95% were White. Nearly half of the patients (42%) had ulcerative colitis, 37% had Crohn’s disease, and 21% had both. The researchers found that nine patients had flared two years before starting isotretinoin. Of these, five (56%) flared and four (44%) did not flare during treatment or within three months of completing the course of isotretinoin.

Of the 10 patients who did not flare two years before starting isotretinoin, seven (70%) did not flare during treatment and three (30%) flared during or within three months following completion of isotretinoin use. The researchers found no statistically significant association between isotretinoin use and flaring among patients with IBD (P = .76).

Dr. Lopez and her colleagues also assessed IBD maintenance therapy with respect to IBD flares in the study population. They observed no statistically significant association between the use of maintenance IBD therapy and the likelihood of having flares during isotretinoin treatment (P = .15).

“The results suggest limited association between isotretinoin and the worsening of a patient’s baseline IBD,” the authors concluded. They acknowledged certain limitations of the study, including its small sample size and retrospective design, and they called for larger and prospective studies to assess the relationship of IBD flaring in this population of patients.

Pooja Sodha, MD, director of the Center for Laser and Cosmetic Dermatology at George Washington University, Washington, who was asked to comment on the results, characterized the trial as “an important study highlighting how we continue to understand the safe use of isotretinoin in the IBD cohort.”

Isotretinoin, she added, “continues to be a highly important treatment for acne and in patients such as these where oral antibiotics are relatively contraindicated due to risk of exacerbating their bowel disease.” Such data are reassuring, “albeit future studies with larger patient pools are desirable,” she added. “Future studies could also help to elucidate if diet, smoking, sleep, exercise, and medication adherence are potential confounding factors along with whether the cumulative isotretinoin dose has any effect on IBD flares in those who are susceptible.”

Neither the researchers nor Dr. Sodha had financial conflicts. The other authors were from Brigham and Women’s Hospital, Harvard University, Boston, and the University of Massachusetts, Worcester.

Since the papules were worrisome for vasculitis, 2 punch biopsies were performed on smaller, younger lesions on the hand and 1 was submitted for direct immunofluorescence. Findings revealed a leukocytoclastic vasculitis (LCV) with prominent immunoglobulin A (IgA) deposits around the vessel wall. The clinical and pathologic findings were consistent with a rare fibrosing LCV called erythema elevatum diutinum (EED). The practice of sampling nonblanching purpura or papules for both standard pathology (hematoxylin and eosin) and direct immunofluorescence can facilitate the diagnosis of unusual conditions that may occur only a few times in one’s career.

EED is rare, chronic, and may be associated with IgA gammopathy, IgA antineutrophil cytoplasmic antibodies, recent streptococcal or HIV infections, or myelodysplastic syndrome. A robust work-up to identify whether any of these factors are at work is critical.¹ Distinct from other vasculitides, EED forms granulation tissue that becomes reinjured.

This patient was found to have an IgA monoclonal gammopathy that was monitored by Hematology. After checking her glucose-6-phosphate dehydrogenase activity, she was treated with oral dapsone 25 mg/d. Dapsone was titrated up to 100 mg/d, which improved her symptoms considerably and the ulcerated papule was surgically revised and closed. EED can last for years and ultimately clear or can persist indefinitely.

‌

Text courtesy of Jonathan Karnes, MD, medical director, MDFMR Dermatology Services, Augusta, ME. Photos courtesy of Jonathan Karnes, MD (copyright retained).

Since the papules were worrisome for vasculitis, 2 punch biopsies were performed on smaller, younger lesions on the hand and 1 was submitted for direct immunofluorescence. Findings revealed a leukocytoclastic vasculitis (LCV) with prominent immunoglobulin A (IgA) deposits around the vessel wall. The clinical and pathologic findings were consistent with a rare fibrosing LCV called erythema elevatum diutinum (EED). The practice of sampling nonblanching purpura or papules for both standard pathology (hematoxylin and eosin) and direct immunofluorescence can facilitate the diagnosis of unusual conditions that may occur only a few times in one’s career.

EED is rare, chronic, and may be associated with IgA gammopathy, IgA antineutrophil cytoplasmic antibodies, recent streptococcal or HIV infections, or myelodysplastic syndrome. A robust work-up to identify whether any of these factors are at work is critical.¹ Distinct from other vasculitides, EED forms granulation tissue that becomes reinjured.

This patient was found to have an IgA monoclonal gammopathy that was monitored by Hematology. After checking her glucose-6-phosphate dehydrogenase activity, she was treated with oral dapsone 25 mg/d. Dapsone was titrated up to 100 mg/d, which improved her symptoms considerably and the ulcerated papule was surgically revised and closed. EED can last for years and ultimately clear or can persist indefinitely.

‌

Text courtesy of Jonathan Karnes, MD, medical director, MDFMR Dermatology Services, Augusta, ME. Photos courtesy of Jonathan Karnes, MD (copyright retained).

Since the papules were worrisome for vasculitis, 2 punch biopsies were performed on smaller, younger lesions on the hand and 1 was submitted for direct immunofluorescence. Findings revealed a leukocytoclastic vasculitis (LCV) with prominent immunoglobulin A (IgA) deposits around the vessel wall. The clinical and pathologic findings were consistent with a rare fibrosing LCV called erythema elevatum diutinum (EED). The practice of sampling nonblanching purpura or papules for both standard pathology (hematoxylin and eosin) and direct immunofluorescence can facilitate the diagnosis of unusual conditions that may occur only a few times in one’s career.

EED is rare, chronic, and may be associated with IgA gammopathy, IgA antineutrophil cytoplasmic antibodies, recent streptococcal or HIV infections, or myelodysplastic syndrome. A robust work-up to identify whether any of these factors are at work is critical.¹ Distinct from other vasculitides, EED forms granulation tissue that becomes reinjured.

This patient was found to have an IgA monoclonal gammopathy that was monitored by Hematology. After checking her glucose-6-phosphate dehydrogenase activity, she was treated with oral dapsone 25 mg/d. Dapsone was titrated up to 100 mg/d, which improved her symptoms considerably and the ulcerated papule was surgically revised and closed. EED can last for years and ultimately clear or can persist indefinitely.

‌

Text courtesy of Jonathan Karnes, MD, medical director, MDFMR Dermatology Services, Augusta, ME. Photos courtesy of Jonathan Karnes, MD (copyright retained).

The anticipated U.S. Food and Drug Administration approval of VP-102 for the treatment of molluscum contagiosum has been delayed because of deficiencies identified at a contract manufacturing organization, according to Verrica Pharmaceuticals, which is developing the product.

VP-102 is a proprietary drug-device combination of cantharidin 0.7% administered through a single-use precision applicator, which has been evaluated in phase 3 studies of patients with molluscum aged 2 years and older. It features a visualization agent so the person applying the drug can see which lesions have been treated. It also contains a bittering agent to mitigate oral ingestion by children.

According to a press release from Verrica, the only deficiency listed in the FDA’s complete response letter stemmed from a general reinspection of Sterling Pharmaceuticals Services, which manufactures Verrica’s bulk solution drug product. Although none of the issues identified by the FDA during the reinspection were specific to the manufacturing of VP-102, FDA policy prevents approval of a new drug application when a contract manufacturing organization has an unresolved classification status or is placed on “official action indicated” status.

According to the press release, Verrica will “continue to work collaboratively” with the FDA to bring VP-102 to the market as soon as possible. The company has completed phase 2 studies of VP-102 for the treatment of common warts and for the treatment of external genital warts, the release said.

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

The anticipated U.S. Food and Drug Administration approval of VP-102 for the treatment of molluscum contagiosum has been delayed because of deficiencies identified at a contract manufacturing organization, according to Verrica Pharmaceuticals, which is developing the product.

VP-102 is a proprietary drug-device combination of cantharidin 0.7% administered through a single-use precision applicator, which has been evaluated in phase 3 studies of patients with molluscum aged 2 years and older. It features a visualization agent so the person applying the drug can see which lesions have been treated. It also contains a bittering agent to mitigate oral ingestion by children.

According to a press release from Verrica, the only deficiency listed in the FDA’s complete response letter stemmed from a general reinspection of Sterling Pharmaceuticals Services, which manufactures Verrica’s bulk solution drug product. Although none of the issues identified by the FDA during the reinspection were specific to the manufacturing of VP-102, FDA policy prevents approval of a new drug application when a contract manufacturing organization has an unresolved classification status or is placed on “official action indicated” status.

According to the press release, Verrica will “continue to work collaboratively” with the FDA to bring VP-102 to the market as soon as possible. The company has completed phase 2 studies of VP-102 for the treatment of common warts and for the treatment of external genital warts, the release said.

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

The anticipated U.S. Food and Drug Administration approval of VP-102 for the treatment of molluscum contagiosum has been delayed because of deficiencies identified at a contract manufacturing organization, according to Verrica Pharmaceuticals, which is developing the product.

VP-102 is a proprietary drug-device combination of cantharidin 0.7% administered through a single-use precision applicator, which has been evaluated in phase 3 studies of patients with molluscum aged 2 years and older. It features a visualization agent so the person applying the drug can see which lesions have been treated. It also contains a bittering agent to mitigate oral ingestion by children.

According to a press release from Verrica, the only deficiency listed in the FDA’s complete response letter stemmed from a general reinspection of Sterling Pharmaceuticals Services, which manufactures Verrica’s bulk solution drug product. Although none of the issues identified by the FDA during the reinspection were specific to the manufacturing of VP-102, FDA policy prevents approval of a new drug application when a contract manufacturing organization has an unresolved classification status or is placed on “official action indicated” status.

According to the press release, Verrica will “continue to work collaboratively” with the FDA to bring VP-102 to the market as soon as possible. The company has completed phase 2 studies of VP-102 for the treatment of common warts and for the treatment of external genital warts, the release said.

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

The Food and Drug Administration has approved tapinarof cream, 1%, a steroid-free topical cream applied once a day, for the treatment of mild, moderate, or severe plaque psoriasis in adults, the manufacturer announced.

Tapinarof is an aryl hydrocarbon receptor agonist and is the first FDA-approved steroid-free topical medication in this class, according to a press release from the manufacturer, Dermavant.

Approval was based on results of three studies in a phase 3 clinical trial program (PSOARING 1, PSOARING 2), and an open-label extension study, (PSOARING 3), the company release said. In PSOARING 1 and 2, approximately 1,000 adults aged 18-75 years (median age, 51 years) with plaque psoriasis were randomized to once-daily topical tapinarof or placebo for up to 12 weeks; 85% were White and 57% were men. The study findings were published in the New England Journal of Medicine in December 2021.

The primary endpoint for both trials was the proportion of patients who achieved Physician Global Assessment (PGA) scores score of “clear” (0) or “almost clear” (1) and improvement of at least two grades from baseline.

After 12 weeks, 36% of the patients in PSOARING 1 and 40% in PSOARING 2 who received tapinarof met the primary outcome, compared with 6% of patients on placebo (P < .001 for both studies). Of these, a total of 73 patients from both studies who achieved PGA scores of 0 were entered in PSOARING 3, a 40-week open-label extension study, in which they stopped tapinarof treatment and retained PGA scores of 0 or 1 for approximately 4 months off treatment. An additional 312 patients who were enrolled in the PSOARING 3 extension study achieved PGA scores of 0 at least once during the study period, with “remittive” effects lasting a mean of 130 days off of treatment.

In addition, patients who received tapinarof in the PSOARING 1 and 2 studies showed significant improvement from baseline, compared with patients on placebo, across a range of secondary endpoints including a 75% or greater improvement in Psoriasis Area and Severity Index score (PASI 75).

In PSOARING 1, and 2, respectively, 36.1% and 47.6% of those on tapinarof achieved a PASI 75 response at week 12, compared with 10.2% and 6.9% of those on the vehicle (P < .001 for both).

Across all three studies, the majority adverse events were mild to moderate, and limited to the application site.

The most common adverse events reported by patients in the tapinarof groups were folliculitis, nasopharyngitis, and contact dermatitis. Headaches were more common among those treated with tapinarof than those on vehicle in the studies (3.8% vs. 2.4% in PSOARING 1, and 3.8% vs. 0.6% in PSOARING 2), leading to only three treatment discontinuations.

At the end of the PSOARING 3 study (at either week 40 or early termination), 599 participants responded to satisfaction questionnaires. Of these, 83.6% said they were satisfied with the results of tapinarof treatment, and 81.7% said it was more effective than previous topical treatments they had used, according to the company’s release.

Tapinarof cream can be used on all areas of the body, including the face, skin folds, neck, genitalia, anal crux, inflammatory areas, and axillae, according to the company release.

Full prescribing information is available here.

The Food and Drug Administration has approved tapinarof cream, 1%, a steroid-free topical cream applied once a day, for the treatment of mild, moderate, or severe plaque psoriasis in adults, the manufacturer announced.

Tapinarof is an aryl hydrocarbon receptor agonist and is the first FDA-approved steroid-free topical medication in this class, according to a press release from the manufacturer, Dermavant.

Approval was based on results of three studies in a phase 3 clinical trial program (PSOARING 1, PSOARING 2), and an open-label extension study, (PSOARING 3), the company release said. In PSOARING 1 and 2, approximately 1,000 adults aged 18-75 years (median age, 51 years) with plaque psoriasis were randomized to once-daily topical tapinarof or placebo for up to 12 weeks; 85% were White and 57% were men. The study findings were published in the New England Journal of Medicine in December 2021.

The primary endpoint for both trials was the proportion of patients who achieved Physician Global Assessment (PGA) scores score of “clear” (0) or “almost clear” (1) and improvement of at least two grades from baseline.

After 12 weeks, 36% of the patients in PSOARING 1 and 40% in PSOARING 2 who received tapinarof met the primary outcome, compared with 6% of patients on placebo (P < .001 for both studies). Of these, a total of 73 patients from both studies who achieved PGA scores of 0 were entered in PSOARING 3, a 40-week open-label extension study, in which they stopped tapinarof treatment and retained PGA scores of 0 or 1 for approximately 4 months off treatment. An additional 312 patients who were enrolled in the PSOARING 3 extension study achieved PGA scores of 0 at least once during the study period, with “remittive” effects lasting a mean of 130 days off of treatment.

In addition, patients who received tapinarof in the PSOARING 1 and 2 studies showed significant improvement from baseline, compared with patients on placebo, across a range of secondary endpoints including a 75% or greater improvement in Psoriasis Area and Severity Index score (PASI 75).

In PSOARING 1, and 2, respectively, 36.1% and 47.6% of those on tapinarof achieved a PASI 75 response at week 12, compared with 10.2% and 6.9% of those on the vehicle (P < .001 for both).

Across all three studies, the majority adverse events were mild to moderate, and limited to the application site.

The most common adverse events reported by patients in the tapinarof groups were folliculitis, nasopharyngitis, and contact dermatitis. Headaches were more common among those treated with tapinarof than those on vehicle in the studies (3.8% vs. 2.4% in PSOARING 1, and 3.8% vs. 0.6% in PSOARING 2), leading to only three treatment discontinuations.

At the end of the PSOARING 3 study (at either week 40 or early termination), 599 participants responded to satisfaction questionnaires. Of these, 83.6% said they were satisfied with the results of tapinarof treatment, and 81.7% said it was more effective than previous topical treatments they had used, according to the company’s release.

Tapinarof cream can be used on all areas of the body, including the face, skin folds, neck, genitalia, anal crux, inflammatory areas, and axillae, according to the company release.

Full prescribing information is available here.

The Food and Drug Administration has approved tapinarof cream, 1%, a steroid-free topical cream applied once a day, for the treatment of mild, moderate, or severe plaque psoriasis in adults, the manufacturer announced.

Tapinarof is an aryl hydrocarbon receptor agonist and is the first FDA-approved steroid-free topical medication in this class, according to a press release from the manufacturer, Dermavant.

Approval was based on results of three studies in a phase 3 clinical trial program (PSOARING 1, PSOARING 2), and an open-label extension study, (PSOARING 3), the company release said. In PSOARING 1 and 2, approximately 1,000 adults aged 18-75 years (median age, 51 years) with plaque psoriasis were randomized to once-daily topical tapinarof or placebo for up to 12 weeks; 85% were White and 57% were men. The study findings were published in the New England Journal of Medicine in December 2021.

The primary endpoint for both trials was the proportion of patients who achieved Physician Global Assessment (PGA) scores score of “clear” (0) or “almost clear” (1) and improvement of at least two grades from baseline.

After 12 weeks, 36% of the patients in PSOARING 1 and 40% in PSOARING 2 who received tapinarof met the primary outcome, compared with 6% of patients on placebo (P < .001 for both studies). Of these, a total of 73 patients from both studies who achieved PGA scores of 0 were entered in PSOARING 3, a 40-week open-label extension study, in which they stopped tapinarof treatment and retained PGA scores of 0 or 1 for approximately 4 months off treatment. An additional 312 patients who were enrolled in the PSOARING 3 extension study achieved PGA scores of 0 at least once during the study period, with “remittive” effects lasting a mean of 130 days off of treatment.

In addition, patients who received tapinarof in the PSOARING 1 and 2 studies showed significant improvement from baseline, compared with patients on placebo, across a range of secondary endpoints including a 75% or greater improvement in Psoriasis Area and Severity Index score (PASI 75).

In PSOARING 1, and 2, respectively, 36.1% and 47.6% of those on tapinarof achieved a PASI 75 response at week 12, compared with 10.2% and 6.9% of those on the vehicle (P < .001 for both).

Across all three studies, the majority adverse events were mild to moderate, and limited to the application site.

The most common adverse events reported by patients in the tapinarof groups were folliculitis, nasopharyngitis, and contact dermatitis. Headaches were more common among those treated with tapinarof than those on vehicle in the studies (3.8% vs. 2.4% in PSOARING 1, and 3.8% vs. 0.6% in PSOARING 2), leading to only three treatment discontinuations.

At the end of the PSOARING 3 study (at either week 40 or early termination), 599 participants responded to satisfaction questionnaires. Of these, 83.6% said they were satisfied with the results of tapinarof treatment, and 81.7% said it was more effective than previous topical treatments they had used, according to the company’s release.

Tapinarof cream can be used on all areas of the body, including the face, skin folds, neck, genitalia, anal crux, inflammatory areas, and axillae, according to the company release.

Full prescribing information is available here.

The European Medicines Agency’s (EMA) Committee for Medicinal Products for Human Use (CHMP) has recommended approval of baricitinib, a Janus kinase (JAK) inhibitor, for the treatment of adults with severe alopecia areata (AA).

The development, which was announced in a May 20, 2022, press release from the manufacturer, Eli Lilly and Incyte, marks the first step toward European regulatory approval of baricitinib (Olumiant) for patients with severe AA, and it is now referred to the European Commission for final action. A decision is expected within the next 2 months.

The committee based its positive opinion on the results of the phase 3 BRAVE-AA1 and BRAVE-AA2 trials, recently published in the New England Journal of Medicine, which evaluated the efficacy and safety of baricitinib in 1,200 patients with severe AA, according to the press release. The primary endpoint was the proportion of patients achieving a Severity of Alopecia Tool (SALT) score of ≤20 at week 36. In both studies, 1 out of 3 patients treated with baricitinib 4-mg achieved 80% or more scalp hair coverage, compared with 1 out of 20 patients and 1 out of 50 patients taking placebo in BRAVE-AA1 and BRAVE-AA2, respectively (P ≤ .001 for all comparisons to placebo).

According to safety profile information from the phase 3 BRAVE-AA clinical program, few patients discontinued treatment because of adverse events (2.6% or less across both studies), and most treatment-emergent adverse events were mild or moderate in severity.

In February 2022, the Food and Drug Administration granted priority review for baricitinib in adults with severe AA. Lilly expects additional regulatory decisions in the United States and Japan in 2022.

Baricitinib is approved in the United States as a treatment for adults with moderate to severe rheumatoid arthritis. Prescribing information can be viewed here.

The European Medicines Agency’s (EMA) Committee for Medicinal Products for Human Use (CHMP) has recommended approval of baricitinib, a Janus kinase (JAK) inhibitor, for the treatment of adults with severe alopecia areata (AA).

The development, which was announced in a May 20, 2022, press release from the manufacturer, Eli Lilly and Incyte, marks the first step toward European regulatory approval of baricitinib (Olumiant) for patients with severe AA, and it is now referred to the European Commission for final action. A decision is expected within the next 2 months.

The committee based its positive opinion on the results of the phase 3 BRAVE-AA1 and BRAVE-AA2 trials, recently published in the New England Journal of Medicine, which evaluated the efficacy and safety of baricitinib in 1,200 patients with severe AA, according to the press release. The primary endpoint was the proportion of patients achieving a Severity of Alopecia Tool (SALT) score of ≤20 at week 36. In both studies, 1 out of 3 patients treated with baricitinib 4-mg achieved 80% or more scalp hair coverage, compared with 1 out of 20 patients and 1 out of 50 patients taking placebo in BRAVE-AA1 and BRAVE-AA2, respectively (P ≤ .001 for all comparisons to placebo).

According to safety profile information from the phase 3 BRAVE-AA clinical program, few patients discontinued treatment because of adverse events (2.6% or less across both studies), and most treatment-emergent adverse events were mild or moderate in severity.

In February 2022, the Food and Drug Administration granted priority review for baricitinib in adults with severe AA. Lilly expects additional regulatory decisions in the United States and Japan in 2022.

Baricitinib is approved in the United States as a treatment for adults with moderate to severe rheumatoid arthritis. Prescribing information can be viewed here.

The European Medicines Agency’s (EMA) Committee for Medicinal Products for Human Use (CHMP) has recommended approval of baricitinib, a Janus kinase (JAK) inhibitor, for the treatment of adults with severe alopecia areata (AA).

The development, which was announced in a May 20, 2022, press release from the manufacturer, Eli Lilly and Incyte, marks the first step toward European regulatory approval of baricitinib (Olumiant) for patients with severe AA, and it is now referred to the European Commission for final action. A decision is expected within the next 2 months.

The committee based its positive opinion on the results of the phase 3 BRAVE-AA1 and BRAVE-AA2 trials, recently published in the New England Journal of Medicine, which evaluated the efficacy and safety of baricitinib in 1,200 patients with severe AA, according to the press release. The primary endpoint was the proportion of patients achieving a Severity of Alopecia Tool (SALT) score of ≤20 at week 36. In both studies, 1 out of 3 patients treated with baricitinib 4-mg achieved 80% or more scalp hair coverage, compared with 1 out of 20 patients and 1 out of 50 patients taking placebo in BRAVE-AA1 and BRAVE-AA2, respectively (P ≤ .001 for all comparisons to placebo).

According to safety profile information from the phase 3 BRAVE-AA clinical program, few patients discontinued treatment because of adverse events (2.6% or less across both studies), and most treatment-emergent adverse events were mild or moderate in severity.

In February 2022, the Food and Drug Administration granted priority review for baricitinib in adults with severe AA. Lilly expects additional regulatory decisions in the United States and Japan in 2022.

Baricitinib is approved in the United States as a treatment for adults with moderate to severe rheumatoid arthritis. Prescribing information can be viewed here.

Microscopic evaluation of a dermoscopy-guided skin scraping revealed that this was a case of scabies.

Classically, patients with scabies have many excoriated papules or plaques on their hands, genitals, and trunk with itching so intense that their sleep is interrupted. However, scabies can also be diagnosed in patients who complain of itching but also have very subtle skin findings, such as a small dry patch or fissure (as in this case). Such subtle findings can be easily mistaken for mild hand dermatitis.

In the elderly, itching without a significant rash can arise from many causes. A short list includes dry skin, medications, kidney disease, liver disease, and of course, various dermatologic conditions. Dermoscopy is a sensitive and specific tool for investigating itching and areas of suspected infestation with mites.¹ A mite appears as an oval on dermoscopy, but the most recognizable part is the head and front legs, which appear as a single gray triangle. The photo shows that the most erythematous area around a burrow (black arrows) is an excellent place to start when looking through the dermatoscope. In this case, an area of broken skin was connected to a haphazard tunnel that ultimately led to the mite (white arrows).

Scabies may be effectively treated with topical permethrin 5% applied over every inch of the body from the top of the neck to the tips of the toes.

This topical treatment is left on for at least 8 hours and reapplied a week later. Also, remember to take a careful history of close contacts so that others who are affected may receive treatment.

This patient was treated with permethrin, as was her adult son who lived at home with her and had similar itching. Permethrin comes in 60 g tubes, which is enough to treat 1 adult twice. After 6 weeks, all itching symptoms in the patient had cleared.

‌

Text courtesy of Jonathan Karnes, MD, medical director, MDFMR Dermatology Services, Augusta, ME. Photos courtesy of Jonathan Karnes, MD (copyright retained).

Microscopic evaluation of a dermoscopy-guided skin scraping revealed that this was a case of scabies.

Classically, patients with scabies have many excoriated papules or plaques on their hands, genitals, and trunk with itching so intense that their sleep is interrupted. However, scabies can also be diagnosed in patients who complain of itching but also have very subtle skin findings, such as a small dry patch or fissure (as in this case). Such subtle findings can be easily mistaken for mild hand dermatitis.

In the elderly, itching without a significant rash can arise from many causes. A short list includes dry skin, medications, kidney disease, liver disease, and of course, various dermatologic conditions. Dermoscopy is a sensitive and specific tool for investigating itching and areas of suspected infestation with mites.¹ A mite appears as an oval on dermoscopy, but the most recognizable part is the head and front legs, which appear as a single gray triangle. The photo shows that the most erythematous area around a burrow (black arrows) is an excellent place to start when looking through the dermatoscope. In this case, an area of broken skin was connected to a haphazard tunnel that ultimately led to the mite (white arrows).

Scabies may be effectively treated with topical permethrin 5% applied over every inch of the body from the top of the neck to the tips of the toes.

This topical treatment is left on for at least 8 hours and reapplied a week later. Also, remember to take a careful history of close contacts so that others who are affected may receive treatment.

This patient was treated with permethrin, as was her adult son who lived at home with her and had similar itching. Permethrin comes in 60 g tubes, which is enough to treat 1 adult twice. After 6 weeks, all itching symptoms in the patient had cleared.

‌

Text courtesy of Jonathan Karnes, MD, medical director, MDFMR Dermatology Services, Augusta, ME. Photos courtesy of Jonathan Karnes, MD (copyright retained).

Microscopic evaluation of a dermoscopy-guided skin scraping revealed that this was a case of scabies.

Classically, patients with scabies have many excoriated papules or plaques on their hands, genitals, and trunk with itching so intense that their sleep is interrupted. However, scabies can also be diagnosed in patients who complain of itching but also have very subtle skin findings, such as a small dry patch or fissure (as in this case). Such subtle findings can be easily mistaken for mild hand dermatitis.

In the elderly, itching without a significant rash can arise from many causes. A short list includes dry skin, medications, kidney disease, liver disease, and of course, various dermatologic conditions. Dermoscopy is a sensitive and specific tool for investigating itching and areas of suspected infestation with mites.¹ A mite appears as an oval on dermoscopy, but the most recognizable part is the head and front legs, which appear as a single gray triangle. The photo shows that the most erythematous area around a burrow (black arrows) is an excellent place to start when looking through the dermatoscope. In this case, an area of broken skin was connected to a haphazard tunnel that ultimately led to the mite (white arrows).

Scabies may be effectively treated with topical permethrin 5% applied over every inch of the body from the top of the neck to the tips of the toes.

This topical treatment is left on for at least 8 hours and reapplied a week later. Also, remember to take a careful history of close contacts so that others who are affected may receive treatment.

This patient was treated with permethrin, as was her adult son who lived at home with her and had similar itching. Permethrin comes in 60 g tubes, which is enough to treat 1 adult twice. After 6 weeks, all itching symptoms in the patient had cleared.

‌

Text courtesy of Jonathan Karnes, MD, medical director, MDFMR Dermatology Services, Augusta, ME. Photos courtesy of Jonathan Karnes, MD (copyright retained).

An investigative synthetic cannabinoid receptor type 2 (CB2) agonist, lenabasum, was associated with greater improvements than placebo in patients with skin-predominant dermatomyositis – some of it statistically significant – in a phase 2, double-blind, randomized, controlled study.

Patients taking lenabasum experienced greater reductions in the Cutaneous Dermatomyositis Disease Area and Severity Index (CDASI) – a validated outcome designed to assess inflammatory skin involvement in the rare autoimmune disease – and improvements in patient-reported and biomarker outcomes, compared with those on placebo, dermatologist Victoria P. Werth, MD, and coinvestigators reported.

Courtesy RegionalDerm.com

And in a recently completed phase 3 trial, reported by the manufacturer, a subpopulation of patients with active skin disease and no active muscle disease again showed greater reductions in CDASI activity scores – a secondary outcome in the trial.

However, the phase 3 DETERMINE trial produced negative findings overall. It enrolled a more heterogeneous group of patients – including those with both muscle weakness and skin involvement – and its primary outcome measure was a broader composite measure, the Total Improvement Score. The trial failed to meet this primary endpoint, Corbus Pharmaceuticals, the developer of lenabasum, announced in a press release in June 2021.

The phase 3 results are “frustrating” for patients with symptomatic and refractory skin manifestations of dermatomyositis (DM), given the promising findings from the phase 2 trial and from an open-label extension study, said Dr. Werth, professor of dermatology and medicine, University of Pennsylvania, Philadelphia, and principal investigator and coprincipal investigator of the phase 2 and phase 3 studies, respectively.

Dr. Werth is scheduled to present the results from the phase 3 trial at the annual European Alliance of Associations for Rheumatology meeting in June.

“With lenabasum, we have a therapy that doesn’t work for every patient, but does work for quite a number of them,” Dr. Werth said in an interview. “It’s oral, it’s not really that immunosuppressing, and there aren’t many side effects. Right now, patients are often being managed with steroids ... we really need treatments that are not as toxic.”

Robert Spiera, MD, a rheumatologist who led trials of lenabasum for treatment of diffuse cutaneous systemic sclerosis (dcSSc), agreed. “The CB2 agonist strategy is appealing because it’s nonimmunosuppressing and has both anti-inflammatory and antifibrotic properties,” he said in an interview. “I wouldn’t want to give up on it ... especially [for patients] with scleroderma and dermatomyositis who are treated with substantial drugs that are associated with morbidity.”

Lenabasum, he said, has proven to be “incredibly safe, and incredibly safe in the long term.”

While the phase 2 trial of the drug for dcSSc showed clear benefit over placebo, the phase 3 trial did not meet its primary endpoint using the American College of Rheumatology Combined Response Index in Diffuse Cutaneous Systemic Sclerosis.

It allowed background immunosuppressant therapy to reflect real-world clinical practice, and “there was such a high response rate to [that therapy, largely mycophenolate] that there was little room to show benefit beyond that,” said Dr. Spiera, director of the vasculitis and scleroderma program, Hospital for Special Surgery, New York.

The drug led to more improvement in the small subset of participants who were not receiving background immunotherapy during the trial, he noted.

Corbus is currently “seeking a partnership to further explore the drug” for treatment in different subpopulations, according to a company spokesperson. Results of a phase 2 trial of lenabasum for the treatment of systemic lupus erythematosus – with a pain rating as the primary outcome measure – are expected soon.
 

Phase 2 findings

The single-center phase 2 trial of lenabasum for DM enrolled 22 adults with minimal muscle involvement as evidenced by normal maximal resistance on muscle testing at entry and throughout the study. Most were taking immunosuppressant medication, and all had CDASI scores of at least 20, with mean scores in the severe range (> 26). Symptoms registered on patient-reported outcome measures were moderate to severe.

Patients received a half-dose of lenabasum (20 mg daily) for 1 month and a full dose (20 mg twice daily) for 2 months, or placebo, and were followed for an additional month without dosing.

Starting at day 43 – approximately 2 weeks after the dose was increased – there was “a trend for the change from baseline CDASI to be greater” in the lenabasum group, compared with those on placebo, Dr. Werth and colleagues reported. The differences reached statistical significance on day 113 (P = .038), a month after patients discontinued lenabasum, “suggesting that the modulation of the inflammatory response by lenabasum continued beyond its last dose.”

Five of the 11 patients treated with lenabasum (45%), and none of those on placebo, achieved at least a 40% reduction in the CDASI activity score by the end of the study.

Patients in the lenabasum group also had greater improvement in the Skindex-29 Symptoms scores – an objective measure of itch – and improvements in other secondary efficacy outcomes, including pain, though these did not reach statistical significance.

Skin biopsies before and after treatment showed significant reductions in inflammatory cytokines relevant to DM pathogenesis. Patients treated with the CB2 agonist had a downward trend in the CD4+ T cell population, which correlated with decreased CDASI activity scores, for instance, and a decrease in IL-31 protein expression, which correlated with decreased Skindex-29 Symptoms scores, the investigators reported.

There were no serious adverse events related to the CB2 agonist, and no treatment discontinuations.

The main part of the phase 2 trial, conducted from 2015 to 2017, was followed by a 3-year, open-label extension, in which 20 of the 22 patients took lenabasum 20 mg twice a day. The drug continued to be safe and well tolerated, and the CDASI activity score and other outcomes improved through year 1 and remained stable thereafter, according to a poster presented by Dr. Werth at the 2021 EULAR meeting.

After 1 year in the open-label extension, 60%-70% of patients had achieved mild skin disease, and 75% had achieved at least a 40% reduction in CDASI activity.

“A lot of patients, even if they weren’t completely cleared, were much happier in terms of their itch,” said Dr. Werth, also chief of dermatology, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia. “It’s been difficult for a lot of them now that they’re off the long-term extension ... a lot of them are flaring.”

The future

In the lab, with funding from the National Institutes of Health, Dr. Werth is continuing to investigate how lenabasum may be working in DM. A paper just published in the open access journal Arthritis Research & Therapy describes CB2 receptor distribution and up-regulation on key immune cells in the skin and blood, and how, in DM skin, its highest expression is on dendritic cells.

Through both mechanistic and more clinical research, “it’s important to understand the characteristics of the people [lenabasum] worked in or didn’t work in,” she said. 

And in clinical trials, it’s important to capture meaningful improvement from the patient perspective. “It may be,” she noted, “that more global, systemic assessments are not the way to go for autoimmune skin disease.”

For dcSSc, Dr. Spiera said, it’s possible that a CB2 agonist may be helpful for patients who have been on immunosuppressants, particularly mycophenolate, for more than 6 months “and are still struggling.”

The phase 2 trial in DM was funded by the National Institutes of Health, the Department of Veterans Affairs, and Corbus Pharmaceuticals. The phase 3 trials in DM and in dcSSc were funded by Corbus. Dr. Werth disclosed grant support from Corbus and several other pharmaceutical companies. Dr. Spiera disclosed that he has received grant support or consulting fees from Roche-Genentech, GlaxoSmithKline, and several other pharmaceutical companies.

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

An investigative synthetic cannabinoid receptor type 2 (CB2) agonist, lenabasum, was associated with greater improvements than placebo in patients with skin-predominant dermatomyositis – some of it statistically significant – in a phase 2, double-blind, randomized, controlled study.

Patients taking lenabasum experienced greater reductions in the Cutaneous Dermatomyositis Disease Area and Severity Index (CDASI) – a validated outcome designed to assess inflammatory skin involvement in the rare autoimmune disease – and improvements in patient-reported and biomarker outcomes, compared with those on placebo, dermatologist Victoria P. Werth, MD, and coinvestigators reported.

Courtesy RegionalDerm.com

And in a recently completed phase 3 trial, reported by the manufacturer, a subpopulation of patients with active skin disease and no active muscle disease again showed greater reductions in CDASI activity scores – a secondary outcome in the trial.

However, the phase 3 DETERMINE trial produced negative findings overall. It enrolled a more heterogeneous group of patients – including those with both muscle weakness and skin involvement – and its primary outcome measure was a broader composite measure, the Total Improvement Score. The trial failed to meet this primary endpoint, Corbus Pharmaceuticals, the developer of lenabasum, announced in a press release in June 2021.

The phase 3 results are “frustrating” for patients with symptomatic and refractory skin manifestations of dermatomyositis (DM), given the promising findings from the phase 2 trial and from an open-label extension study, said Dr. Werth, professor of dermatology and medicine, University of Pennsylvania, Philadelphia, and principal investigator and coprincipal investigator of the phase 2 and phase 3 studies, respectively.

Dr. Werth is scheduled to present the results from the phase 3 trial at the annual European Alliance of Associations for Rheumatology meeting in June.

“With lenabasum, we have a therapy that doesn’t work for every patient, but does work for quite a number of them,” Dr. Werth said in an interview. “It’s oral, it’s not really that immunosuppressing, and there aren’t many side effects. Right now, patients are often being managed with steroids ... we really need treatments that are not as toxic.”

Robert Spiera, MD, a rheumatologist who led trials of lenabasum for treatment of diffuse cutaneous systemic sclerosis (dcSSc), agreed. “The CB2 agonist strategy is appealing because it’s nonimmunosuppressing and has both anti-inflammatory and antifibrotic properties,” he said in an interview. “I wouldn’t want to give up on it ... especially [for patients] with scleroderma and dermatomyositis who are treated with substantial drugs that are associated with morbidity.”

Lenabasum, he said, has proven to be “incredibly safe, and incredibly safe in the long term.”

While the phase 2 trial of the drug for dcSSc showed clear benefit over placebo, the phase 3 trial did not meet its primary endpoint using the American College of Rheumatology Combined Response Index in Diffuse Cutaneous Systemic Sclerosis.

It allowed background immunosuppressant therapy to reflect real-world clinical practice, and “there was such a high response rate to [that therapy, largely mycophenolate] that there was little room to show benefit beyond that,” said Dr. Spiera, director of the vasculitis and scleroderma program, Hospital for Special Surgery, New York.

The drug led to more improvement in the small subset of participants who were not receiving background immunotherapy during the trial, he noted.

Corbus is currently “seeking a partnership to further explore the drug” for treatment in different subpopulations, according to a company spokesperson. Results of a phase 2 trial of lenabasum for the treatment of systemic lupus erythematosus – with a pain rating as the primary outcome measure – are expected soon.
 

Phase 2 findings

The single-center phase 2 trial of lenabasum for DM enrolled 22 adults with minimal muscle involvement as evidenced by normal maximal resistance on muscle testing at entry and throughout the study. Most were taking immunosuppressant medication, and all had CDASI scores of at least 20, with mean scores in the severe range (> 26). Symptoms registered on patient-reported outcome measures were moderate to severe.

Patients received a half-dose of lenabasum (20 mg daily) for 1 month and a full dose (20 mg twice daily) for 2 months, or placebo, and were followed for an additional month without dosing.

Starting at day 43 – approximately 2 weeks after the dose was increased – there was “a trend for the change from baseline CDASI to be greater” in the lenabasum group, compared with those on placebo, Dr. Werth and colleagues reported. The differences reached statistical significance on day 113 (P = .038), a month after patients discontinued lenabasum, “suggesting that the modulation of the inflammatory response by lenabasum continued beyond its last dose.”

Five of the 11 patients treated with lenabasum (45%), and none of those on placebo, achieved at least a 40% reduction in the CDASI activity score by the end of the study.

Patients in the lenabasum group also had greater improvement in the Skindex-29 Symptoms scores – an objective measure of itch – and improvements in other secondary efficacy outcomes, including pain, though these did not reach statistical significance.

Skin biopsies before and after treatment showed significant reductions in inflammatory cytokines relevant to DM pathogenesis. Patients treated with the CB2 agonist had a downward trend in the CD4+ T cell population, which correlated with decreased CDASI activity scores, for instance, and a decrease in IL-31 protein expression, which correlated with decreased Skindex-29 Symptoms scores, the investigators reported.

There were no serious adverse events related to the CB2 agonist, and no treatment discontinuations.

The main part of the phase 2 trial, conducted from 2015 to 2017, was followed by a 3-year, open-label extension, in which 20 of the 22 patients took lenabasum 20 mg twice a day. The drug continued to be safe and well tolerated, and the CDASI activity score and other outcomes improved through year 1 and remained stable thereafter, according to a poster presented by Dr. Werth at the 2021 EULAR meeting.

After 1 year in the open-label extension, 60%-70% of patients had achieved mild skin disease, and 75% had achieved at least a 40% reduction in CDASI activity.

“A lot of patients, even if they weren’t completely cleared, were much happier in terms of their itch,” said Dr. Werth, also chief of dermatology, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia. “It’s been difficult for a lot of them now that they’re off the long-term extension ... a lot of them are flaring.”

The future

In the lab, with funding from the National Institutes of Health, Dr. Werth is continuing to investigate how lenabasum may be working in DM. A paper just published in the open access journal Arthritis Research & Therapy describes CB2 receptor distribution and up-regulation on key immune cells in the skin and blood, and how, in DM skin, its highest expression is on dendritic cells.

Through both mechanistic and more clinical research, “it’s important to understand the characteristics of the people [lenabasum] worked in or didn’t work in,” she said. 

And in clinical trials, it’s important to capture meaningful improvement from the patient perspective. “It may be,” she noted, “that more global, systemic assessments are not the way to go for autoimmune skin disease.”

For dcSSc, Dr. Spiera said, it’s possible that a CB2 agonist may be helpful for patients who have been on immunosuppressants, particularly mycophenolate, for more than 6 months “and are still struggling.”

The phase 2 trial in DM was funded by the National Institutes of Health, the Department of Veterans Affairs, and Corbus Pharmaceuticals. The phase 3 trials in DM and in dcSSc were funded by Corbus. Dr. Werth disclosed grant support from Corbus and several other pharmaceutical companies. Dr. Spiera disclosed that he has received grant support or consulting fees from Roche-Genentech, GlaxoSmithKline, and several other pharmaceutical companies.

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

An investigative synthetic cannabinoid receptor type 2 (CB2) agonist, lenabasum, was associated with greater improvements than placebo in patients with skin-predominant dermatomyositis – some of it statistically significant – in a phase 2, double-blind, randomized, controlled study.

Patients taking lenabasum experienced greater reductions in the Cutaneous Dermatomyositis Disease Area and Severity Index (CDASI) – a validated outcome designed to assess inflammatory skin involvement in the rare autoimmune disease – and improvements in patient-reported and biomarker outcomes, compared with those on placebo, dermatologist Victoria P. Werth, MD, and coinvestigators reported.

Courtesy RegionalDerm.com

And in a recently completed phase 3 trial, reported by the manufacturer, a subpopulation of patients with active skin disease and no active muscle disease again showed greater reductions in CDASI activity scores – a secondary outcome in the trial.

However, the phase 3 DETERMINE trial produced negative findings overall. It enrolled a more heterogeneous group of patients – including those with both muscle weakness and skin involvement – and its primary outcome measure was a broader composite measure, the Total Improvement Score. The trial failed to meet this primary endpoint, Corbus Pharmaceuticals, the developer of lenabasum, announced in a press release in June 2021.

The phase 3 results are “frustrating” for patients with symptomatic and refractory skin manifestations of dermatomyositis (DM), given the promising findings from the phase 2 trial and from an open-label extension study, said Dr. Werth, professor of dermatology and medicine, University of Pennsylvania, Philadelphia, and principal investigator and coprincipal investigator of the phase 2 and phase 3 studies, respectively.

Dr. Werth is scheduled to present the results from the phase 3 trial at the annual European Alliance of Associations for Rheumatology meeting in June.

“With lenabasum, we have a therapy that doesn’t work for every patient, but does work for quite a number of them,” Dr. Werth said in an interview. “It’s oral, it’s not really that immunosuppressing, and there aren’t many side effects. Right now, patients are often being managed with steroids ... we really need treatments that are not as toxic.”

Robert Spiera, MD, a rheumatologist who led trials of lenabasum for treatment of diffuse cutaneous systemic sclerosis (dcSSc), agreed. “The CB2 agonist strategy is appealing because it’s nonimmunosuppressing and has both anti-inflammatory and antifibrotic properties,” he said in an interview. “I wouldn’t want to give up on it ... especially [for patients] with scleroderma and dermatomyositis who are treated with substantial drugs that are associated with morbidity.”

Lenabasum, he said, has proven to be “incredibly safe, and incredibly safe in the long term.”

While the phase 2 trial of the drug for dcSSc showed clear benefit over placebo, the phase 3 trial did not meet its primary endpoint using the American College of Rheumatology Combined Response Index in Diffuse Cutaneous Systemic Sclerosis.

It allowed background immunosuppressant therapy to reflect real-world clinical practice, and “there was such a high response rate to [that therapy, largely mycophenolate] that there was little room to show benefit beyond that,” said Dr. Spiera, director of the vasculitis and scleroderma program, Hospital for Special Surgery, New York.

The drug led to more improvement in the small subset of participants who were not receiving background immunotherapy during the trial, he noted.

Corbus is currently “seeking a partnership to further explore the drug” for treatment in different subpopulations, according to a company spokesperson. Results of a phase 2 trial of lenabasum for the treatment of systemic lupus erythematosus – with a pain rating as the primary outcome measure – are expected soon.
 

Phase 2 findings

The single-center phase 2 trial of lenabasum for DM enrolled 22 adults with minimal muscle involvement as evidenced by normal maximal resistance on muscle testing at entry and throughout the study. Most were taking immunosuppressant medication, and all had CDASI scores of at least 20, with mean scores in the severe range (> 26). Symptoms registered on patient-reported outcome measures were moderate to severe.

Patients received a half-dose of lenabasum (20 mg daily) for 1 month and a full dose (20 mg twice daily) for 2 months, or placebo, and were followed for an additional month without dosing.

Starting at day 43 – approximately 2 weeks after the dose was increased – there was “a trend for the change from baseline CDASI to be greater” in the lenabasum group, compared with those on placebo, Dr. Werth and colleagues reported. The differences reached statistical significance on day 113 (P = .038), a month after patients discontinued lenabasum, “suggesting that the modulation of the inflammatory response by lenabasum continued beyond its last dose.”

Five of the 11 patients treated with lenabasum (45%), and none of those on placebo, achieved at least a 40% reduction in the CDASI activity score by the end of the study.

Patients in the lenabasum group also had greater improvement in the Skindex-29 Symptoms scores – an objective measure of itch – and improvements in other secondary efficacy outcomes, including pain, though these did not reach statistical significance.

Skin biopsies before and after treatment showed significant reductions in inflammatory cytokines relevant to DM pathogenesis. Patients treated with the CB2 agonist had a downward trend in the CD4+ T cell population, which correlated with decreased CDASI activity scores, for instance, and a decrease in IL-31 protein expression, which correlated with decreased Skindex-29 Symptoms scores, the investigators reported.

There were no serious adverse events related to the CB2 agonist, and no treatment discontinuations.

The main part of the phase 2 trial, conducted from 2015 to 2017, was followed by a 3-year, open-label extension, in which 20 of the 22 patients took lenabasum 20 mg twice a day. The drug continued to be safe and well tolerated, and the CDASI activity score and other outcomes improved through year 1 and remained stable thereafter, according to a poster presented by Dr. Werth at the 2021 EULAR meeting.

After 1 year in the open-label extension, 60%-70% of patients had achieved mild skin disease, and 75% had achieved at least a 40% reduction in CDASI activity.

“A lot of patients, even if they weren’t completely cleared, were much happier in terms of their itch,” said Dr. Werth, also chief of dermatology, Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia. “It’s been difficult for a lot of them now that they’re off the long-term extension ... a lot of them are flaring.”

The future

In the lab, with funding from the National Institutes of Health, Dr. Werth is continuing to investigate how lenabasum may be working in DM. A paper just published in the open access journal Arthritis Research & Therapy describes CB2 receptor distribution and up-regulation on key immune cells in the skin and blood, and how, in DM skin, its highest expression is on dendritic cells.

Through both mechanistic and more clinical research, “it’s important to understand the characteristics of the people [lenabasum] worked in or didn’t work in,” she said. 

And in clinical trials, it’s important to capture meaningful improvement from the patient perspective. “It may be,” she noted, “that more global, systemic assessments are not the way to go for autoimmune skin disease.”

For dcSSc, Dr. Spiera said, it’s possible that a CB2 agonist may be helpful for patients who have been on immunosuppressants, particularly mycophenolate, for more than 6 months “and are still struggling.”

The phase 2 trial in DM was funded by the National Institutes of Health, the Department of Veterans Affairs, and Corbus Pharmaceuticals. The phase 3 trials in DM and in dcSSc were funded by Corbus. Dr. Werth disclosed grant support from Corbus and several other pharmaceutical companies. Dr. Spiera disclosed that he has received grant support or consulting fees from Roche-Genentech, GlaxoSmithKline, and several other pharmaceutical companies.

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

Patients with psoriasis have a significantly increased risk of severe and rare infections, compared with the general population, according to a population-based cohort study of nearly 95,000 patients.

Although previous studies have shown a higher risk for comorbid conditions in people with psoriasis, compared with those without psoriasis, data on the occurrence of severe and rare infections in patients with psoriasis are limited, wrote Nikolai Loft, MD, of the department of dermatology and allergy, Copenhagen University Hospital, Gentofte, and colleagues.

Psoriasis patients are often treated with immunosuppressive therapies that may promote or aggravate infections; therefore, a better understanding of psoriasis and risk of infections is needed, they said. In a study published in the British Journal of Dermatology, Dr. Loft and his coinvestigators reviewed data on adults aged 18 years and older from the Danish National Patient Register between Jan. 1, 1997 and Dec. 31, 2018. The study population included 94,450 adults with psoriasis and 566,700 matched controls. Patients with any type of psoriasis and any degree of severity were included.

The primary outcome was the occurrence of severe infections, defined as those requiring assessment at a hospital, and rare infections, defined as HIV, TB, HBV, and HCV. The median age of the participants was 52.3 years, and slightly more than half were women.

Overall, the incidence rate of severe and rare infections among patients with any type of psoriasis was 3,104.9 per 100,000 person-years, compared with 2,381.1 for controls, with a hazard ratio, adjusted for gender, age, ethnicity, socioeconomic status, alcohol-related conditions, and Charlson comorbidity index (aHR) of 1.29.

For any infections resulting in hospitalization, the incidence rate was 2,005.1 vs. 1,531.8 per 100,000 person-years for patients with any type of psoriasis and controls, respectively.

The results were similar when severe infections and rare infections were analyzed separately. The incidence rate of severe infections was 3,080.6 and 2,364.4 per 100,000 person-years for patients with any psoriasis, compared with controls; the incidence rate for rare infections was 42.9 and 31.8 for all psoriasis patients and controls, respectively.

When the data were examined by psoriasis severity, the incidence rate of severe and rare infections among patients with severe psoriasis was 3,847.7 per 100,000 person-years, compared with 2,351.9 per 100,000 person years among controls (aHR, 1.58) and also higher than in patients with mild psoriasis. The incidence rate of severe and rare infections in patients with mild psoriasis (2,979.1 per 100,000 person-years) also was higher than in controls (aHR, 1.26).

Factors that might explain the increased infection risk with severe psoriasis include the altered immune environment in these patients, the researchers wrote in their discussion of the findings. Also, “patients with severe psoriasis are defined by their eligibility for systemics, either conventional or biologic,” and their increased infection risk may stem from these treatments, rather than disease severity itself, they noted.

The study findings were limited by several factors including the lack of data on such confounders as weight, body mass index, and smoking status, they added. Other limitations included potential surveillance bias because of greater TB screening, and the use of prescriptions, rather than the Psoriasis Area Severity Index, to define severity. However, the results were strengthened by the large sample size, and suggest that patients with any type of psoriasis have higher rates of any infection, severe or rare, than the general population, the researchers concluded.

Data show need for clinician vigilance

Based on the 2020 Census data, an estimated 7.55 million adults in the United States have psoriasis, David Robles, MD, said in an interview. “Patients with psoriasis have a high risk for multiple comorbid conditions including metabolic syndrome, which is characterized by obesity, hypertension, and dyslipidemia,” said Dr. Robles, a dermatologist in private practice in Pomona, Calif., who was not involved in the study. “Although these complications were previously attributed to diet and obesity, it has become clear that the proinflammatory cytokines associated with psoriasis may be playing an important role underlying the pathologic basis of these other comorbidities.”

There is an emerging body of literature “indicating that psoriasis is associated with an increased risk of infections,” he added. Research in this area is particularly important because of the increased risk of infections associated with many biologic and immune-modulating treatments for psoriasis, Dr. Robles noted.

The study findings “indicate that, as the severity of psoriasis increases, so does the risk of severe and rare infections,” he said. “This makes it imperative for clinicians to be alert to the possibility of severe or rare infections in patients with psoriasis, especially those with severe psoriasis, so that early intervention can be initiated.”

As for additional research, “as an immunologist and dermatologist, I cannot help but think about the possible role the genetic and cytokine pathways involved in psoriasis may be playing in modulating the immune system and/or microbiome, and whether this contributes to a higher risk of infections,” Dr. Robles said. “Just as it was discovered that patients with atopic dermatitis have decreased levels of antimicrobial peptides in their skin, making them susceptible to recurrent bacterial skin infections, we may find that the genetic and immunological changes associated with psoriasis may independently contribute to infection susceptibility,” he noted. “More basic immunology and virology research may one day shed light on this observation.”

The study was supported by Novartis. Lead author Dr. Loft disclosed serving as a speaker for Eli Lilly and Janssen Cilag, other authors disclosed relationships with multiple companies including Novartis, and two authors are Novartis employees. Dr. Robles had no relevant financial disclosures.

Patients with psoriasis have a significantly increased risk of severe and rare infections, compared with the general population, according to a population-based cohort study of nearly 95,000 patients.

Although previous studies have shown a higher risk for comorbid conditions in people with psoriasis, compared with those without psoriasis, data on the occurrence of severe and rare infections in patients with psoriasis are limited, wrote Nikolai Loft, MD, of the department of dermatology and allergy, Copenhagen University Hospital, Gentofte, and colleagues.

Psoriasis patients are often treated with immunosuppressive therapies that may promote or aggravate infections; therefore, a better understanding of psoriasis and risk of infections is needed, they said. In a study published in the British Journal of Dermatology, Dr. Loft and his coinvestigators reviewed data on adults aged 18 years and older from the Danish National Patient Register between Jan. 1, 1997 and Dec. 31, 2018. The study population included 94,450 adults with psoriasis and 566,700 matched controls. Patients with any type of psoriasis and any degree of severity were included.

The primary outcome was the occurrence of severe infections, defined as those requiring assessment at a hospital, and rare infections, defined as HIV, TB, HBV, and HCV. The median age of the participants was 52.3 years, and slightly more than half were women.

Overall, the incidence rate of severe and rare infections among patients with any type of psoriasis was 3,104.9 per 100,000 person-years, compared with 2,381.1 for controls, with a hazard ratio, adjusted for gender, age, ethnicity, socioeconomic status, alcohol-related conditions, and Charlson comorbidity index (aHR) of 1.29.

For any infections resulting in hospitalization, the incidence rate was 2,005.1 vs. 1,531.8 per 100,000 person-years for patients with any type of psoriasis and controls, respectively.

The results were similar when severe infections and rare infections were analyzed separately. The incidence rate of severe infections was 3,080.6 and 2,364.4 per 100,000 person-years for patients with any psoriasis, compared with controls; the incidence rate for rare infections was 42.9 and 31.8 for all psoriasis patients and controls, respectively.

When the data were examined by psoriasis severity, the incidence rate of severe and rare infections among patients with severe psoriasis was 3,847.7 per 100,000 person-years, compared with 2,351.9 per 100,000 person years among controls (aHR, 1.58) and also higher than in patients with mild psoriasis. The incidence rate of severe and rare infections in patients with mild psoriasis (2,979.1 per 100,000 person-years) also was higher than in controls (aHR, 1.26).

Factors that might explain the increased infection risk with severe psoriasis include the altered immune environment in these patients, the researchers wrote in their discussion of the findings. Also, “patients with severe psoriasis are defined by their eligibility for systemics, either conventional or biologic,” and their increased infection risk may stem from these treatments, rather than disease severity itself, they noted.

The study findings were limited by several factors including the lack of data on such confounders as weight, body mass index, and smoking status, they added. Other limitations included potential surveillance bias because of greater TB screening, and the use of prescriptions, rather than the Psoriasis Area Severity Index, to define severity. However, the results were strengthened by the large sample size, and suggest that patients with any type of psoriasis have higher rates of any infection, severe or rare, than the general population, the researchers concluded.

Data show need for clinician vigilance

Based on the 2020 Census data, an estimated 7.55 million adults in the United States have psoriasis, David Robles, MD, said in an interview. “Patients with psoriasis have a high risk for multiple comorbid conditions including metabolic syndrome, which is characterized by obesity, hypertension, and dyslipidemia,” said Dr. Robles, a dermatologist in private practice in Pomona, Calif., who was not involved in the study. “Although these complications were previously attributed to diet and obesity, it has become clear that the proinflammatory cytokines associated with psoriasis may be playing an important role underlying the pathologic basis of these other comorbidities.”

There is an emerging body of literature “indicating that psoriasis is associated with an increased risk of infections,” he added. Research in this area is particularly important because of the increased risk of infections associated with many biologic and immune-modulating treatments for psoriasis, Dr. Robles noted.

The study findings “indicate that, as the severity of psoriasis increases, so does the risk of severe and rare infections,” he said. “This makes it imperative for clinicians to be alert to the possibility of severe or rare infections in patients with psoriasis, especially those with severe psoriasis, so that early intervention can be initiated.”

As for additional research, “as an immunologist and dermatologist, I cannot help but think about the possible role the genetic and cytokine pathways involved in psoriasis may be playing in modulating the immune system and/or microbiome, and whether this contributes to a higher risk of infections,” Dr. Robles said. “Just as it was discovered that patients with atopic dermatitis have decreased levels of antimicrobial peptides in their skin, making them susceptible to recurrent bacterial skin infections, we may find that the genetic and immunological changes associated with psoriasis may independently contribute to infection susceptibility,” he noted. “More basic immunology and virology research may one day shed light on this observation.”

The study was supported by Novartis. Lead author Dr. Loft disclosed serving as a speaker for Eli Lilly and Janssen Cilag, other authors disclosed relationships with multiple companies including Novartis, and two authors are Novartis employees. Dr. Robles had no relevant financial disclosures.

Patients with psoriasis have a significantly increased risk of severe and rare infections, compared with the general population, according to a population-based cohort study of nearly 95,000 patients.

Although previous studies have shown a higher risk for comorbid conditions in people with psoriasis, compared with those without psoriasis, data on the occurrence of severe and rare infections in patients with psoriasis are limited, wrote Nikolai Loft, MD, of the department of dermatology and allergy, Copenhagen University Hospital, Gentofte, and colleagues.

Psoriasis patients are often treated with immunosuppressive therapies that may promote or aggravate infections; therefore, a better understanding of psoriasis and risk of infections is needed, they said. In a study published in the British Journal of Dermatology, Dr. Loft and his coinvestigators reviewed data on adults aged 18 years and older from the Danish National Patient Register between Jan. 1, 1997 and Dec. 31, 2018. The study population included 94,450 adults with psoriasis and 566,700 matched controls. Patients with any type of psoriasis and any degree of severity were included.

The primary outcome was the occurrence of severe infections, defined as those requiring assessment at a hospital, and rare infections, defined as HIV, TB, HBV, and HCV. The median age of the participants was 52.3 years, and slightly more than half were women.

Overall, the incidence rate of severe and rare infections among patients with any type of psoriasis was 3,104.9 per 100,000 person-years, compared with 2,381.1 for controls, with a hazard ratio, adjusted for gender, age, ethnicity, socioeconomic status, alcohol-related conditions, and Charlson comorbidity index (aHR) of 1.29.

For any infections resulting in hospitalization, the incidence rate was 2,005.1 vs. 1,531.8 per 100,000 person-years for patients with any type of psoriasis and controls, respectively.

The results were similar when severe infections and rare infections were analyzed separately. The incidence rate of severe infections was 3,080.6 and 2,364.4 per 100,000 person-years for patients with any psoriasis, compared with controls; the incidence rate for rare infections was 42.9 and 31.8 for all psoriasis patients and controls, respectively.

When the data were examined by psoriasis severity, the incidence rate of severe and rare infections among patients with severe psoriasis was 3,847.7 per 100,000 person-years, compared with 2,351.9 per 100,000 person years among controls (aHR, 1.58) and also higher than in patients with mild psoriasis. The incidence rate of severe and rare infections in patients with mild psoriasis (2,979.1 per 100,000 person-years) also was higher than in controls (aHR, 1.26).

Factors that might explain the increased infection risk with severe psoriasis include the altered immune environment in these patients, the researchers wrote in their discussion of the findings. Also, “patients with severe psoriasis are defined by their eligibility for systemics, either conventional or biologic,” and their increased infection risk may stem from these treatments, rather than disease severity itself, they noted.

The study findings were limited by several factors including the lack of data on such confounders as weight, body mass index, and smoking status, they added. Other limitations included potential surveillance bias because of greater TB screening, and the use of prescriptions, rather than the Psoriasis Area Severity Index, to define severity. However, the results were strengthened by the large sample size, and suggest that patients with any type of psoriasis have higher rates of any infection, severe or rare, than the general population, the researchers concluded.

Data show need for clinician vigilance

Based on the 2020 Census data, an estimated 7.55 million adults in the United States have psoriasis, David Robles, MD, said in an interview. “Patients with psoriasis have a high risk for multiple comorbid conditions including metabolic syndrome, which is characterized by obesity, hypertension, and dyslipidemia,” said Dr. Robles, a dermatologist in private practice in Pomona, Calif., who was not involved in the study. “Although these complications were previously attributed to diet and obesity, it has become clear that the proinflammatory cytokines associated with psoriasis may be playing an important role underlying the pathologic basis of these other comorbidities.”

There is an emerging body of literature “indicating that psoriasis is associated with an increased risk of infections,” he added. Research in this area is particularly important because of the increased risk of infections associated with many biologic and immune-modulating treatments for psoriasis, Dr. Robles noted.

The study findings “indicate that, as the severity of psoriasis increases, so does the risk of severe and rare infections,” he said. “This makes it imperative for clinicians to be alert to the possibility of severe or rare infections in patients with psoriasis, especially those with severe psoriasis, so that early intervention can be initiated.”

As for additional research, “as an immunologist and dermatologist, I cannot help but think about the possible role the genetic and cytokine pathways involved in psoriasis may be playing in modulating the immune system and/or microbiome, and whether this contributes to a higher risk of infections,” Dr. Robles said. “Just as it was discovered that patients with atopic dermatitis have decreased levels of antimicrobial peptides in their skin, making them susceptible to recurrent bacterial skin infections, we may find that the genetic and immunological changes associated with psoriasis may independently contribute to infection susceptibility,” he noted. “More basic immunology and virology research may one day shed light on this observation.”

The study was supported by Novartis. Lead author Dr. Loft disclosed serving as a speaker for Eli Lilly and Janssen Cilag, other authors disclosed relationships with multiple companies including Novartis, and two authors are Novartis employees. Dr. Robles had no relevant financial disclosures.