, at least in the short term, say the authors of a new meta-analysis published in JAMA Dermatology.
Considering data on over 17,000 patients with different dermatoses from 45 placebo-controlled randomized clinical trials with an average follow up of 16 weeks, they found there was no significant increase in the occurrence of major adverse cardiovascular events (MACE) or venous thromboembolism (VTE) in people with dermatoses treated with JAK-STAT inhibitors, compared with placebo.
The I² statistic was 0.00% for both MACE and VTE comparing the two arms, indicating that the results were unlikely to be due to chance. There was no increased risk in MACE between those on placebo and those on JAK-STAT inhibitors, with a risk ratio (RR) of 0.47; or for VTE risk, with an RR of 0.46.
Similar findings were obtained when data were analyzed according to the dermatological condition being treated, mechanism of action of the medication, or whether the medication carried a boxed warning.
These data “suggest inconsistency with established sentiments,” that JAK-STAT inhibitors increase the risk for cardiovascular events, Patrick Ireland, MD, of the University of New South Wales, Randwick, Australia, and coauthors wrote in the article. “This may be owing to the limited time frames in which these rare events could be adequately captured, or the ages of enrolled patients being too young to realize the well established heightened risks of developing MACE and VTE,” they suggested.
However, the findings challenge the notion that the cardiovascular complications of these drugs are the same in all patients; dermatological use may not be associated with the same risks as with use for rheumatologic indications.
Class-Wide Boxed Warning
“JAK-STAT [inhibitors] have had some pretty indemnifying data against their use, with the ORAL [Surveillance] study demonstrating increased all-cause mortality, cardiovascular events, venous thromboembolism, and malignancy,” Dr. Ireland said in an interview.
ORAL Surveillance was an open-label, postmarketing trial conducted in patients with rheumatoid arthritis treated with tofacitinib or a tumor necrosis factor (TNF) inhibitor. The results led the US Food and Drug Administration to require information about the risks of serious heart-related events, cancer, blood clots, and death in a boxed warning for JAK-STAT inhibitors in 2022.
“I think it’s important to recognize that these [ORAL Surveillance participants] are very different patients to the typical dermatological patient being treated with a JAK-STAT [inhibitors], with newer studies demonstrating a much safer profile than initially thought,” Dr. Ireland said.
Examining Risk in Dermatological Conditions
The meta-analysis performed by Dr. Ireland and associates focused specifically on the risk for MACE and VTE in patients being treated for dermatological conditions, and included trials published up until June 2023. Only trials that had included a placebo arm were considered; pooled analyses, long-term extension trial data, post hoc analyses, and pediatric-specific trials were excluded.
Most (25) of the trials were phase 2b or phase 3 trials, 18 were phase 2 to 2b, and two were phase 1 trials. The studies included 12,996 participants, mostly with atopic dermatitis or psoriasis, who were treated with JAK-STAT inhibitors, which included baricitinib (2846 patients), tofacitinib (2470), upadacitinib (2218), abrocitinib (1904), and deucravacitinib (1492), among others. There were 4925 patients on placebo.
Overall, MACE — defined as a combined endpoint of acute myocardial infarction, stroke, cardiovascular mortality, heart failure, and unstable angina, as well as arterial embolism — occurred in 13 of the JAK-STAT inhibitor-treated patients and in four of those on placebo. VTE — defined as deep vein thrombosis, pulmonary embolism, and any unusual site thrombosis — was reported in eight JAK-STAT inhibitor-treated patients and in one patient on placebo.
The pooled incidence ratios for MACE and VTE were calculated as 0.20 per 100 person exposure years (PEY) for JAK-STAT inhibitor treatment and 0.13 PEY for placebo. The pooled RRs comparing the two treatment groups were a respective 1.13 for MACE and 2.79 for VTE, but neither RR reached statistical significance.
No difference was seen between the treatment arms in terms of treatment emergent adverse events (RR, 1.05), serious adverse events (RR, 0.92), or study discontinuation because of adverse events (RR, 0.94).