Used in the treatment of autoimmune diseases such as systemic lupus erythematosus (SLE) and rheumatoid arthritis by modulating the immune response. It targets the CD40 ligand on immune cells, inhibiting the co-stimulatory signals required for B-cell activation and antibody production. This reduces autoantibody formation and inflammation, helping to control disease progression. Investigated in clinical trials for its potential in preventing organ transplant rejection and treating other chronic inflammatory conditions due to its ability to suppress T-cell-dependent immune activation.