Recipient Immune System Components and Donor Antigens

Recipient Immune System Components and Donor Antigens refers to the collective biological entities and interactions involved in the recognition of foreign tissue during transplantation. The recipient's immune system, specifically T-cells and B-cells, identifies donor-derived Human Leukocyte Antigens (HLA) and minor histocompatibility antigens as non-self (StatPearls, 2023). This recognition triggers an alloimmune response that can lead to graft rejection or, in the case of bone marrow transplants, graft-versus-host disease (GVHD) (NIH, 2022). Therapeutic strategies targeting this interface aim to suppress the recipient's immune response using drugs like calcineurin inhibitors, antimetabolites, and monoclonal antibodies (PubMed, 2021). Effective management requires balancing the prevention of rejection with the risks of over-immunosuppression, such as infection and cancer. This entry is considered a systemic interaction or a clinical category rather than a single molecular therapeutic target.

Other names

AlloantigensHistocompatibility antigensTransplant antigensHost-versus-graft interfaceDonor-recipient histocompatibility complex

Inhibition of T-cell activation, depletion of lymphocytes, and blockade of costimulatory signals to prevent alloreactive immune responses.