| mediator |
an object or substance that intervenes on behalf of something else, or transmits or conveys something else, such as (1) a structure of the nervous system that transmits impulses eliciting a specific response; (2) a chemical substance (neurotransmitter) that induces activity in an excitable tissue, such as nerve or muscle; or (3) a substance released from cells as the result of the interaction of antigen with antibody or by the action of antigen with a sensitized lymphocyte.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
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