Multiple T-cell surface antigens and other lymphocyte markers

Multiple T-cell surface antigens and other lymphocyte markers represent a collective group of proteins found on the surface of immune cells, primarily T-lymphocytes. This group includes critical molecules such as CD2, CD3, CD4, CD8, CD11a, CD18, CD25, CD44, CD45, and HLA class I and II molecules (Mohty, 2002). These proteins are involved in various biological processes, including T-cell activation, signal transduction, and cell-cell adhesion (Popow et al., 2013). This broad set of antigens serves as the therapeutic target for polyclonal antibody preparations like Antithymocyte globulin (ATG), which are used to induce rapid and profound immunosuppression (StatPearls, 2023). By binding to these diverse markers, the drugs facilitate the depletion of circulating T-cells through complement-dependent cytotoxicity and apoptosis (DrugBank, 2024). This multi-target approach is clinically vital for preventing and treating acute organ transplant rejection and managing severe aplastic anemia. However, the broad reactivity also leads to significant safety concerns, such as cytokine release syndrome and an increased risk of opportunistic infections (NIH, 2023).

Other names

T-cell antigensLymphocyte surface markersATG targetsThymocyte antigens

Depletion of T-lymphocytes through complement-dependent cytotoxicity (CDC), antibody-dependent cellular cytotoxicity (ADCC), and induction of apoptosis, alongside the modulation of various cell surface receptors involved in T-cell signaling and adhesion (Mohty, 2002; Popow et al., 2013).