Brentuximab Vedotin for Systemic Sclerosis

This is a multicenter prospective double blind placebo controlled dose escalation safety clinical trial with brentuximab vedotin and stable background immunosuppressive therapy in adult individuals with Diffuse Cutaneous Systemic Sclerosis (dcSSc). Adult male and female participants with dcSSc will be recruited by a collaborative group of clinical sites in the United States. Participants who meet the eligibility criteria will be enrolled without regard to gender, race, or ethnicity. Eligible participants will be randomly assigned to study treatment, either brentuximab vedotin or placebo equivalent in a 6:2 ratio favoring brentuximab vedotin. Three dose cohorts are planned with 8 participants in each cohort, for a total of 24 participants who receive sufficient doses of the investigational medication to assess safety. The doses planned for each ascending dose cohort include 0.6mg/kg, 1.2 mg/kg, and 1.8 mg/kg brentuximab vedotin or placebo equivalent. All cohorts will receive intravenous administration of study medication every 3 weeks for 21 weeks, for a total of eight doses. Following completion of treatment, participants will undergo follow-up visits at weeks 24, 28, 36 and 48.