cytotoxic T-lymphocyte antigen-4

cytotoxic T-lymphocyte antigen-4 (CTLA-4),

expressed by activated T cells. When synthesized as a soluble molecule fused to the Fc of IgG, it is used as a biologic therapy in rhematic diseases, because it blocks a costimulatory molecule on B lymphocytes.
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Cytotoxic T-lymphocyte antigen-4 (CTLA-4): a negative feedback mechanism that limits the body's developing immune response to keep it from becoming overactivated and causing nonspecific damage

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