Multiple T-cell and dendritic cell surface antigens

Multiple T-cell and dendritic cell surface antigens refers to a broad group of proteins expressed on the surface of immune cells, including CD2, CD3, CD4, CD8, CD11a, CD18, CD25, CD40, CD44, CD45, and HLA class I and II molecules. These antigens are collectively targeted by polyclonal antibody preparations such as Antithymocyte Globulin (ATG), which is derived from the serum of animals (rabbits or horses) immunized with human thymocytes. These surface molecules play critical roles in T-cell signaling, adhesion, and antigen recognition, making them vital for the execution of the adaptive immune response. By binding to this diverse array of receptors, therapeutic agents can induce rapid depletion of circulating T-lymphocytes and interfere with dendritic cell function. This broad immunosuppressive approach is primarily utilized in the prevention and treatment of acute graft-versus-host disease (GvHD) and organ transplant rejection, as well as in the management of severe aplastic anemia. However, the non-specific nature of targeting multiple antigens simultaneously carries significant risks, including profound immunosuppression and systemic inflammatory reactions.

Other names

T-lymphocyte antigensThymocyte antigensT-cell surface antigens

Induction of T-cell depletion through complement-dependent cytotoxicity, antibody-dependent cell-mediated cytotoxicity, and apoptosis, as well as modulation of surface receptors involved in T-cell activation and leukocyte adhesion.