Matthew C Baker, Audra Horomanski, Yiwen Wang, Yuhan Liu, Shima Parsafar, Robert Fairchild, Joshua J Mooney, Rishi Raj, Ronald Witteles, Mark C Genovese

A double-blind, placebo-controlled, randomized withdrawal trial of sarilumab for the treatment of glucocorticoid-dependent sarcoidosis

  • Pharmacology (medical)
  • Rheumatology
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Abstract Objectives Effective steroid-sparing therapies for the treatment of sarcoidosis are lacking; IL-6 antagonists may reduce sarcoidosis disease activity. This study assessed the safety and efficacy of the IL-6 receptor antagonist, sarilumab, in subjects with glucocorticoid-dependent sarcoidosis. Methods This phase II, double-blind, placebo-controlled, randomized withdrawal trial enrolled 15 subjects with biopsy-proven sarcoidosis at Stanford University from November 2019 to September 2022. In period 1, subjects were treated with open-label s.c. sarilumab 200 mg every 2 weeks for 16 weeks, with predefined tapering of prednisone. Subjects who completed period 1 without a sarcoidosis flare entered period 2 and were randomized to continue sarilumab or to receive matching placebo for 12 weeks. The end points included flare-free survival, as well as changes in pulmonary function tests, chest imaging, patient-reported outcomes, and laboratory values. Results Fifteen subjects were enrolled in the study (median age 57 years, 80% male, 73.3% White), and 10 subjects successfully completed period 1. During period 1, 4 of the 15 subjects (26.7%) discontinued due to worsening of their sarcoidosis, and CT chest imaging worsened in 5 of the 15 subjects (35.7%). During period 2, 0 of 2 subjects in the sarilumab group and 1 of 8 subjects (12.5%) in the placebo group had a flare. Treatment with sarilumab 200 mg was generally well tolerated in subjects with sarcoidosis. Conclusion In this double-blind, placebo-controlled, randomized withdrawal trial, a meaningful signal of improvement in subjects with sarcoidosis treated with sarilumab was not observed. Given the small numbers in this study, no definitive conclusions can be drawn. Trial Registration ClinicalTrials.gov, http://clinicaltrials.gov, NCT04008069.

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