allotransplantation

DEFINITION of allotransplantation

allotransplantation contrasts with [autotransplantation], syngeneic transplantation or isografting (between genetically identical individuals, such as identical twins), and xenotransplantation (between different species). Most solid organ and tissue transplants in humans (kidney, liver, heart, cornea, many bone and soft‑tissue grafts) are allotransplants because donors and recipients are usually not genetically identical. Because donor and recipient differ genetically, the recipient immune system recognizes alloantigens on the graft and may mount rejection responses, requiring immunosuppression to maintain graft survival. In some tissues like processed bone or cartilage, the allograft can be relatively biologically inert (“homostatic”), reducing immunogenicity.

|Term|Breakdown|Meaning| |---|---|---| |Allograft|allo‑ “other” + graft|The actual organ/tissue transplanted between genetically different individuals of same species.| |Allotransplant|allo‑ + transplant|The graft or the act of transplanting between such individuals (verb or noun).| |Autotransplantation]]|auto‑ “self” + transplantation|Transplant from one site to another in the same individual (autograft). | |Isograft/syngeneic transplant|iso‑ “equal” + graft|Graft between genetically identical individuals (e.g., identical twins).[| |Xenotransplantation|xeno‑ “foreign” + transplantation|Transplant of cells/tissues/organs between different species (e.g., pig to human).[| |Alloimmunity / allogeneic|allo‑ + immunity / ‑genic|Immune responses directed against antigens from a genetically different member of the same species, as in graft rejection.|

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ETYMOLOGY of allotransplantation

greek “allotransplantation” is built from the combining form allo‑ (Greek allos meaning “other” or “different”) plus transplantation (“transfer of tissue/organ to another site or person”). The same allo‑ root appears in related terms like allograft, allogeneic, and alloimmune, all referring to interactions between genetically different members of the same species.

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DERIVATIONS of allotransplantation

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Query functionality

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Med roots Appendix A Prefixes Appendix B Combining Forms Appendix C Suffixes Appendix D Suffix forms