The purpose of this study is to test whether a drug called PRA023 (the study drug) is a good treatment for patients with Systemic Sclerosis associated with Interstitial Lung Disease (SSc-ILD). The study drug PRA023 is an investigational drug that is given by infusion every 4 weeks. An investigational drug is not approved by The US Food and Drug Administration. It can only be used in a research study like this one. In this study, PRA023 will be compared with a placebo (dummy drug). The placebo will be a saline solution that does not have any study drug in it. The comparison with the placebo helps to determine whether the effects seen in your body is because of the PRA023 or not. This is a randomized study meaning that you will be assigned by chance (like flipping a coin) to receive either the study drug or placebo. This will be done with the help of a computer-based program and you will have 50% chance of receiving either the study drug or placebo. The study is double-blinded study and 50 weeks long, meaning you and your study doctor will not know what you are receiving, the study drug or placebo.

The study is sponsored by Prometheus Biosciences, Inc. The study is being done at approximately 25 sites across the United States. The main portion of the study will require 15 visits to the MUSC main campus and will have the following procedures completed over the course of your participation: blood draw, physician-led assessments of your disease (for example physical exam and skin thickness testing), tests to assess your pulmonary function and health (Pulmonary Function Test (PFT) and High Resolution Computed Tomography (HRCT)), electrocardiogram, as well as asked to complete surveys. Compensation is available for participation.

The purpose of this study is to obtain information on the safety, efficacy, and tolerability of an oral drug called HZN-825 for the treatment of diffuse cutaneous systemic sclerosis (dcSSc) in participants 18-75. The study drug is taken as a tablet twice a day for 52 weeks. This study has 12 planned visits over a 60 week period. The study will measure the improvement, stabilization or worsening of your symptoms, such as changes in your fatigue and pain levels, lung function, skin thickness and other participant reported outcomes.

This study is being conducted in order to test the safety of Brentuximab Vedotin in subjects with Diffuse Cutaneous Systemic Sclerosis. The study involves a Screening visit, a Baseline visit and 12 study visits occurring every 3 to 4 weeks, with enrollment lasting approximately 52 weeks, during which enrolled subjects will receive either the study compound or placebo.