Steven R. Feldman, MD, PhD
Schlösser and colleagues provide a real-world report of 48 patients treated with upadacitinib for atopic dermatitis, many of whom had previously been treated with cyclosporine and dupilumab. The upbeat authors concluded, "Overall, adverse events were mostly well tolerated." Being a cynical, glass-is-half-empty kind of person, I wondered what that meant. Most patients (56%) reported adverse events, the most common being acne (25% of patients treated), nausea (13%), respiratory tract infections (10%), and herpes virus (8%). The herpes virus signal is not just a bit of a concern for me, but it also makes it hard for me to convince patients to take a Janus kinase (JAK) inhibitor, as when I even mention herpes, patients reply, often rather emphatically, "I don't want herpes!" I'll be encouraging patients to get vaccinated for shingles when starting them on JAK inhibitors.
Dupilumab seems to work great in real-life use. In Martinez-Cabriales and colleagues' study of 62 children age < 12 with atopic dermatitis, only four discontinued the treatment. One of these was a nonresponder who took only one injection and had flushing, and one of the other three discontinued because their skin had completely cleared.
When I saw the title of Rand and colleagues' article, "Matching-Adjusted Indirect Comparison of the Long-Term Efficacy Maintenance and Adverse Event Rates of Lebrikizumab Versus Dupilumab in Moderate-to-Severe Atopic Dermatitis," I thought, Oh, this is great — a head-to-head, long-term trial comparing lebrikizumab and dupilumab. I was disappointed to find that this was simply a retrospective analysis of data reported from different studies. The study found little difference in efficacy or safety of the two drugs. Both seem to be excellent medications for atopic dermatitis.
Here's another study (Zhou et al) that reports possible increased risk for a comorbidity (cognitive dysfunction) associated with atopic dermatitis. This study reports that there is an elevated hazard ratio that is statistically significant; the article fails to report what the increased absolute risk is for cognitive dysfunction associated with atopic dermatitis. My guess is that it is small and probably clinically unimportant. The hazard ratio for developing dementia was 1.16. It's hard to know how that translates into absolute risk, but my brilliant friend and former partner, Dr Alan Fleischer, once told me that the odds ratio for smoking and lung cancer is something like 100; the hazard ratio is in the range of 20. On the basis of a hazard ratio of 1.16, I don't think patients with atopic dermatitis need to be any more worried about dementia than those without. (Though, to be honest, I think we can all be worried about developing dementia.)
In this tour de force analysis of 83 trials with over 20,000 participants, Drucker and colleagues determined that high doses of abrocitinib and upadacitinib are more effective than even dupilumab for atopic dermatitis. The standard doses of these JAK inhibitors were similar in efficacy to dupilumab. I think it's safe to say that JAK inhibitors are, at least at their high doses, more effective than dupilumab, but safety remains a critical factor in treatment decision-making. I think JAK inhibitors are a great option for patients who need the most effective treatment or who fail to respond to dupilumab.
The title of the article by Oh and colleagues, "Increased Risk of Renal Malignancy in Patients With Moderate to Severe Atopic Dermatitis," seems like it could terrify patients. The study involved an analysis of an enormous number of people, including tens of thousands with atopic dermatitis and millions of controls. The investigators did find statistically significant differences in the rate of malignancy. The rate of renal cancer was about 1.6 per 10,000 person-years for people without atopic dermatitis or people with mild atopic dermatitis; the rate was about 2.5 per 10,000 people for patients with moderate to severe atopic dermatitis. While the rate of renal cancer was statistically significantly higher in patients with moderate to severe atopic dermatitis (ie, the higher rate was unlikely to be occurring due to chance alone), these patients have very little risk for renal malignancy. The authors' conclusion that regular checkups for renal malignancy are recommended for patients with severe atopic dermatitis seems unnecessary to me.