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Biological and clinical insights from a randomised phase II study of an anti-oncostatin M monoclonal antibody in systemic sclerosis.
Biological and clinical insights from a randomised phase II study of an anti-oncostatin M monoclonal antibody in systemic sclerosis. Rheumatology (Oxford, England) Denton, C. P., Del Galdo, F., Khanna, D., Vonk, M. C., Chung, L., Johnson, S. R., Varga, J., Furst, D. E., Temple, J., Zecchin, C., Csomor, E., Lee, A., Wisniacki, N., Flint, S. M., Reid, J. 2022Abstract
OBJECTIVES: The cytokine oncostatin M (OSM) is implicated in the pathology of systemic sclerosis (SSc). Inhibiting OSM signalling using GSK2330811 (an anti-OSM monoclonal antibody) in patients with SSc has the potential to slow or stop the disease process.METHODS: This multicentre, randomised, double-blind, placebo-controlled study enrolled participants aged =18years with active diffuse cutaneous SSc. Participants were randomised 3:1 (GSK2330811: placebo) in one of two sequential cohorts to receive GSK2330811 (Cohort 1: 100mg; Cohort 2: 300mg) or placebo subcutaneously every other week for 12weeks. The primary end point was safety; blood and skin biopsy samples were collected to explore mechanistic effects on inflammation and fibrosis. Clinical efficacy was an exploratory end point.RESULTS: Thirty-five participants were randomised to placebo (n=8), GSK2330811 100mg (n=3) or 300mg (n=24). Proof of mechanism, measured by coordinate effects on biomarkers of inflammation or fibrosis, was not demonstrated following GSK2330811 treatment. There were no meaningful differences between GSK2330811 and placebo for any efficacy endpoints. Safety and tolerability of GSK2330811 were not favourable in the 300mg group, with on-target, dose-dependent adverse events relating to decreases in haemoglobin and platelet count that were not observed in the 100mg or placebo groups.CONCLUSION: Despite a robust and novel experimental medicine approach and evidence of target engagement, anticipated SSc-related biologic effects of GSK2330811 were not different from placebo and safety was unfavourable, suggesting OSM inhibition may not be a useful therapeutic strategy in SSc.TRIAL REGISTRATION NUMBER: ClinicalTrials.gov registration number: NCT03041025, EudraCT registration number: 2016-003417-95.
View details for DOI 10.1093/rheumatology/keac300
View details for PubMedID 35583273