A Study of LY3471851 in Adults With Systemic Lupus Erythematosus (SLE)

Open to people ages 18-65

• Have a clinical diagnosis of SLE at least 24 weeks prior to screening.
• Have documentation of having met at least 4 of 11 Revised Criteria for Classification of Systemic Lupus Erythematosus according to the 1997 Update of the 1982 American College of Rheumatology (ACR) criteria for classification of SLE prior to randomization.
• Have a positive antinuclear antibody (ANA) (titer ≥1:80) and/or a positive anti-double-stranded deoxyribonucleic acid (dsDNA), and/or a positive anti-Smith (anti-Sm) as assessed by a central laboratory during screening.
• Have a total Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2K) score ≥6 during screening.
• Have a clinical SLEDAI-2K score ≥4 at randomization.
• Have active arthritis and/or active rash.

• Have severe active lupus nephritis.
• Have active central nervous system (CNS) lupus.
• Have a history or presence of cardiovascular, respiratory, hepatic, gastrointestinal, endocrine, hematological, neurological, or neuropsychiatric disorders or any other serious and/or unstable illness that, in the opinion of the investigator, could constitute an unacceptable risk when taking investigational product or interfere with the interpretation of data.
• Have a current or recent clinically serious viral, bacterial, fungal, or parasitic infection.