Non-inherited maternal antigen (NIMA) (NIMA)

Non-inherited maternal antigens (NIMA) refer to the Human Leukocyte Antigen (HLA) alleles that a mother possesses but does not pass on to her child during conception (Aarnink et al., 2014). During gestation, the fetus is exposed to these maternal antigens through semi-permeable placental barriers and microchimerism, which often induces a state of long-lasting immunological tolerance known as the "NIMA effect" (van Rood et al., 1988). This phenomenon is characterized by a reduced immune response in the offspring toward those specific maternal HLA types later in life. In the context of clinical transplantation, NIMA is not a drug target but a critical factor in donor selection; patients requiring hematopoietic stem cell or organ transplants may show better outcomes when receiving grafts from donors who match their NIMA (Ichinohe et al., 2004). Specifically, NIMA-matched mismatched transplants have been associated with lower incidences of graft-versus-host disease (GVHD) and improved overall survival compared to other mismatched scenarios (van Rood et al., 2002). Consequently, NIMA serves as a vital biomarker for optimizing donor-recipient compatibility in immunotherapy and regenerative medicine (Claas et al., 2011).

Other names

Non-inherited maternal HLANIMA effectMaternal HLA antigens not inherited by the offspring

Not applicable; NIMA is an immunological phenomenon used for donor selection rather than a pharmacological target for drug binding.