Definition

1. Adjective:
   • Denoting or relating to cells or tissues from individuals belonging to the same species but genetically dissimilar (and hence immunologically incompatible): This term is used primarily in medicine and biology to describe a transplant or graft where the donor and recipient are of the same species but are not genetically identical. This genetic difference means the recipient's immune system may recognize the transplanted material as foreign and attempt to reject it.

Usage Examples

• Adjective:
  • The patient received an allogeneic bone marrow transplant from his sister.
  • Rejection is a major risk in allogeneic organ transplants.
  • Researchers are studying ways to reduce the complications associated with allogeneic grafts.

Advanced Usage

• "Allogeneic transplantation": The process of transferring cells, tissues, or organs from one individual to another genetically non-identical individual of the same species.

  • Allogeneic transplantation is a common treatment for certain blood cancers.

• "Allogeneic response": The immune reaction mounted by a recipient against donor cells or tissues.

  • The success of the graft depends on managing the allogeneic response.

Variants and Related Words

• Allograft (n): The tissue or organ that is transplanted in an allogeneic procedure.

  • The surgeon performed an allograft of the cornea.

• Syngeneic (adj): Denoting cells or tissues from genetically identical individuals (e.g., identical twins), which are immunologically compatible. This is the opposite of allogeneic.

  • A syngeneic transplant carries no risk of graft-versus-host disease.

Synonyms

• Homologous (in a specific immunological context): Similar in position, structure, and evolutionary origin but not necessarily from the same individual. (Note: In general use, "homologous" is broader; in transplantation, "allogeneic" is more precise.)
• Non-autologous: Not derived from the same individual.

Antonyms

• Autologous: Denoting cells or tissues derived from the same individual.
  • An autologous blood transfusion uses the patient's own blood.
• Syngeneic: Denoting cells or tissues from a genetically identical donor (e.g., an identical twin).

Adjective

1. denoting or relating to cells or tissues from individuals belonging to the same species but genetically dissimilar (and hence immunologically incompatible)