Ocular surface disease
In a separate presentation on the safety of biologics, Andrew Blauvelt, MD, MBA, of the Oregon Medical Research Center, Portland, said that in routine care, ocular surface disease is the most predominant side effect associated with dupilumab. “We don’t know the mechanism of action. But it’s not infectious, it’s not pink eye, and importantly, it’s not allergic conjunctivitis,” he said, noting that the spectrum of disease ranges from dry eye and eye itching to “frank conjunctivitis” and keratitis.
Most cases are mild to moderate and can often be managed with lubricating eye drops and periodic use of corticosteroid eye drops. Co-management with an ophthalmologist is often advisable, he said.
Dupilumab-associated erythema/eczema of the face was “not seen much” in clinical trials but is also being reported in the literature, largely by European researchers, Dr. Blauvelt said. “We hear a lot about red face, but I don’t think it’s much of an issue,” he said. “Most of the time, in my experience, it will [reflect] breakthrough residual AD, and I like to treat it with non-steroidal topicals.”
Occasionally, the withdrawal of steroids or allergic contact dermatitis are at play, Dr. Blauvelt said. “If you see red face in a person on dupilumab, use your clinical prowess, do a differential diagnosis, and treat accordingly.”
Effect on S. aureus
The vast majority of adults with moderate to severe AD have skin colonization with S. aureus, Dr. Beck said during the session on long-term control of AD. The presence of S. aureus in skin cultures correlates strongly with AD severity, type 2 immunity polarization, skin barrier disruption, and allergen sensitization, she said.
“So if we could do something to get rid of the staph and keep it away, one might imagine that would help” control the AD disease process, she said.
An ADRN study evaluated S. aureus in the skin of 71 patients who were randomized to receive dupilumab or placebo and found a “profound” effect of the biologic. “We were truly shocked by how quickly we saw a reduction in Staph aureus ... in lesional skin as early as 3 days” into treatment with dupilumab, she said of the unpublished findings. “And there is a pretty nice association with improvement in disease severity.”
Dr. Beck reported consultancy/advisory board work with Regeneron, Sanofi/Genzyme, among other disclosures. Dr. Blauvelt reported consultancy/advisory board work for Regeneron and Sanofi Genzyme and has received speakers bureau/honoraria for non-CME work for Regeneron and Sanofi, among other disclosures.