Used in immunotherapy research to modulate T-cell activity by blocking the LAG-3 receptor, enhancing immune response against tumors. Investigated for treatment of various cancers, including melanoma and non-small cell lung cancer, often in combination with other checkpoint inhibitors like anti-PD-1 antibodies. Supports restoration of T-cell proliferation and cytokine production, helping overcome immune evasion by cancer cells. Also applied in autoimmune disease research to study immune regulation mechanisms.