A Study of the Efficacy and Safety of Belimumab in Adults With Interstitial Lung Disease Associated With Connective Tissue Disease

Open to people ages 18 years and up

• Documented diagnosis of rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), idiopathic inflammatory myopathy (IIM; including polymyositis, dermatomyositis, anti-synthetase syndrome), Sjogren's syndrome (pSS), or mixed connective tissue disease (MCTD) in accordance with internationally recognized classification criteria
• Diagnosis of ILD on High Resolution Computed Tomography (HRCT) with disease extent of greater than or equal to (≥) 10% of the whole lung (WLILD)
• Evidence of ILD progression in the previous 24 months
• Must be currently receiving stable standard therapy to manage ILD and/or underlying CTD, or to have failed or failed to tolerate first line standard therapy.
• Participant is capable and willing to self-administer the study medication or has a caregiver who is capable and willing to administer the study medication throughout the study
• A female participant is eligible to participate if she is not pregnant or breastfeeding, and one of the following conditions applies:
  • Is a woman of nonchildbearing potential (WONCBP) OR
  • Is a Woman of childbearing potential (WOCBP) and using a contraceptive method that is highly effective, with a failure rate of less than (<)1%
• Capable of giving signed informed consent

• Diagnosis of ILD other than CTD-ILD.
• Primary diagnosis of Systemic Sclerosis (SSc).
• Participants with rapidly progressive disease (absolute drop of 10% or more of FVC between screening and baseline visit and/or recent pulmonary hospitalization).
• FVC ≤ 45% of predicted, or a Diffusing Capacity of the lung for Carbon Monoxide (DLco) (corrected for hemoglobin) ≤ 40% of predicted at screening
• History or presence of diffuse alveolar hemorrhage (DAH) or other confounding pulmonary disease, signs, or symptoms
• Pulmonary arterial hypertension requiring therapy, as determined by the investigator at, or prior to first day of dosing (Day 1)
• Dependence on continuous oxygen supplementation
• History or presence of cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrine, hematologic, or neurological disorders capable of significantly altering the absorption, metabolism, or elimination of drugs; constituting a risk when taking the study intervention or interfering with the interpretation of data
• Obstructive pulmonary disease (pre-bronchodilator Forced Expiratory Volume (FEV1) /FVC <0.7).
• Significant emphysema on screening or historical HRCT (extent of emphysema exceeds extent of ILD)
• Confirmed Progressive multifocal leukoencephalopathy (PML) or unexplained new-onset or deteriorating neurologic signs and symptoms
• Participants with patient health questionnaire (PHQ-9) score ≥10, that in the opinion of a mental healthcare professional pose a serious suicide risk, or have any history of suicidal behavior in the last 6 months and/or any suicidal ideation in the last 2 months, or who in the investigator's judgment, poses a significant suicide risk.
• Lymphoma, leukemia, or any malignancy within the past 5 years except for basal cell or squamous epithelial carcinomas of the skin that have been resected with no evidence of metastatic disease for 3 years
• Breast cancer within the past 10 years
• Major surgery (including joint surgery) within 3 months prior to screening or planned during the duration of the study
• An active infection, or a history of infections