Pooled Safety Analysis of Baricitinib in Adult Participants with Atopic Dermatitis in the Japanese Subpopulation from Six Randomized Clinical Trials

The safety of systemic Janus kinase inhibitors in atopic dermatitis: A systematic review and meta-analysis of randomized controlled trials

Janus kinase (JAK) inhibitors have been recently approved by the FDA and are widely used in the treatment of patients with atopic dermatitis. However, a comprehensive safety profile of JAK inhibitors in patients with atopic dermatitis has not been analysed. This study aimed to establish clinical evidence for the safety of systemic JAK inhibitors in patients with atopic dermatitis. Medline, Embase, Clinicaltrials.gov, Cochrane Central Register of Controlled Trials (CENTRAL) and International Clinical Trials Registry Platform (ICTRP) were considered for search databases. Randomized controlled trials reporting the adverse events of systemic therapy in patients with atopic dermatitis were included. The risk of 11 adverse events was compared between the JAK inhibitors and placebo groups. Fourteen randomized controlled trials were analysed published between 2019 and 2022. The JAK inhibitors included in the analysis were abrocitinib (10, 30, 100 and 200 mg), baricitinib (1, 2 and 4 mg) and upadacitinib (7.5, 15 and 30 mg). The risk of herpes zoster, headache, acne, elevated blood creatinine phosphokinase and nausea was significantly increased, but the risk of serious infection, non-melanoma skin cancer (NMSC), malignancies other than NMSC, major adverse cardiovascular event, venous thromboembolism and nasopharyngitis was not increased. This study provides comprehensive clinical evidence on the risk of various adverse events in patients with atopic dermatitis. However, since the follow-up periods of the studies analysed in this review were mostly limited to 16 weeks or less, it is recommended that comprehensive long-term observational studies be conducted to determine any potential adverse events associated with major cardiovascular events or malignancies, which typically have prolonged courses.

Infectious adverse events in patients with atopic dermatitis treated with baricitinib

Baricitinib is a JAK1-2 inhibitor recently approved in Europe and Japan for the treatment of moderate-to-severe atopic dermatitis in adult patients at doses of 2 and 4 mg daily. The aim of this article is to discuss the safety profile of baricitinib in atopic dermatitis using data from clinical trials and the supporting literature, with a focus on infectious adverse events. An integrated analysis of safety data from eight clinical trials described infections as the most frequent treatment-emergent adverse events, mainly of mild-to-moderate severity, notably upper respiratory tract infections and herpes simplex exacerbations. Real-world data are still limited and will contribute to precisely profile the patients that might benefit from this treatment.

Acne Among Japanese Patients with Atopic Dermatitis Receiving Upadacitinib in the Phase 3 Rising Up Study

INTRODUCTION

Upadacitinib, an oral selective Janus kinase (JAK) inhibitor, is used to treat moderate-to-severe atopic dermatitis (AD). Acne is the most common treatment-emergent adverse event in patients with AD treated with upadacitinib. In this post hoc analysis, we describe the acne events in Japanese patients with AD who received upadacitinib during the Rising Up study.

METHODS

In this phase 3, double-blind, 3-year trial evaluating the safety and efficacy of upadacitinib 15 mg or 30 mg in Japanese patients with moderate-to-severe AD, patients were randomized 1:1:1 to receive upadacitinib 15 mg, 30 mg, or placebo for up to 16 weeks. At week 16, placebo-treated patients were re-randomized 1:1 to receive upadacitinib 15 mg or 30 mg. The incidence, characteristics, and management of treatment-emergent acne events up to the 52-week cutoff date were summarized.

RESULTS

Among 272 patients in this analysis, the incidence of acne was higher in patients receiving upadacitinib compared with patients who received placebo. The rate of acne was higher in patients receiving upadacitinib 30 mg (32.4%) compared with those taking upadacitinib 15 mg (17.3%) during the long-term treatment period. All cases of acne were mild or moderate; no cases led to study drug discontinuation. The mean (range) of acne onset was 135.4 (7-465) days after starting study drug. Most acne occurred on the face; inflammatory papules were the most common morphology. Risk factors for acne included relevant concomitant medications (e.g., corticosteroids) started before acne onset and family and personal history of acne. Acne was generally managed with topical treatments.

CONCLUSION

Mild or moderate acne reported in Japanese patients with AD receiving upadacitinib occurred in a dose-dependent manner and had a variable onset time. Acne was readily managed with topical treatments. Patients and clinicians should be aware of the risk of acne associated with upadacitinib treatment for AD.

TRIAL REGISTRATION

ClinicalTrials.gov identifier, NCT03661138.