This clinical trial is focused on studying a condition called systemic sclerosis-associated interstitial lung disease (SSc-ILD). This is a disease where the immune system attacks the body, leading to hardening and thickening of the skin and affecting the lungs. The study will test a treatment called belimumab, which is given as an injection under the skin. Belimumab is being compared to a placebo, which looks like the treatment but does not contain the active medicine.
The purpose of the study is to see if belimumab can help reduce the decline in lung function in people with SSc-ILD. Participants will receive either belimumab or a placebo, in addition to their usual treatment, over a period of 52 weeks. The study will monitor changes in lung volume and other health measures to determine the effectiveness and safety of belimumab.
Participants will be asked to self-administer the injections or have a caregiver do it for them. The study aims to provide more information on whether belimumab can be a helpful treatment for people with SSc-ILD, potentially improving their quality of life by slowing down the progression of lung disease.



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