Dictionary » S » Self antigen

Self antigen

Definition

noun, plural: self antigens

An exogenous antigen that is recognized as nonself by the immune system, which should be considered otherwise under normal conditions.


Supplement

Production of autoantigens occurs under normal conditions, especially when a cell becomes neoplastic that it has to be recognized and acted upon by the immune system. However, when the immune system continues to fail to recognize own constituent parts as self it can lead to an autoimmune disease.


Word origin: self + antigen.

Also called: autoantigen

See also: autoimmunity


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