STRATUS, a Phase II Study of Abituzumab in Patients with Systemic Sclerosis-associated Interstitial Lung Disease

Abstract
Objective To investigate the effects of abituzumab in systemic sclerosis-associated interstitial lung disease (SSc-ILD).
Methods STRATUS was a Phase II, double-blind, parallel-group, multicenter trial (NCT02745145). Adults (≤75 years) with SSc-ILD on stable mycophenolate were randomized (2:2:1) to receive intravenous abituzumab 1500 mg, placebo, or abituzumab 500 mg every 4 weeks for 104 weeks. Primary endpoint: annual rate of change in absolute FVC.
Results STRATUS was terminated prematurely due to slow enrolment (n=75 screened, n=24 randomized), precluding robust analysis of efficacy. Abituzumab was well-tolerated; no new safety signals were detected.
Conclusion Further investigation of abituzumab for treatment of SSc-ILD is required.