Multiple T lymphocyte surface antigens

"Multiple T lymphocyte surface antigens" is not a single molecule or receptor, but an umbrella term for the many cell-surface proteins expressed on T cells. These proteins (such as CD3, CD4, CD8, CD25) serve critical roles in T cell activation, signaling, differentiation, immune regulation, and communication. While each antigen is a valid therapeutic target or biomarker on its own, the phrase is too ambiguous for precise mapping or structured annotation for a molecular database. Individual antigens are therapeutic targets, diagnostic markers, or components of immunomodulatory pathways in cancer, infection, autoinflammatory, and immunodeficiency disorders[5][2][6]. Drugs and biologics frequently target specific T cell surface antigens for immune modulation, cytotoxicity, or cell depletion. Clinical and laboratory immunology relies on these markers for T cell classification and functional assessment.

Inhibition or modulation of T cell activation (e.g., anti-CD3, anti-CD4 antibodies) - Depletion or expansion of specific T cell subsets - Cytokine signaling modulation (e.g., anti-CD25 blocks IL-2 signaling) - Targeted delivery/cytotoxicity to T cells in leukemia/lymphoma