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AICD is programmed cell death caused by the interaction of Fas receptors and Fas ligands. AICD is a negative regulator of activated T lymphocytes that results from repeated stimulation of their T-cell receptors and helps to maintain peripheral immune tolerance. Alteration of the process may lead to autoimmune diseases.
The AICD effector cell is one that expresses FasL, and apoptosis is induced in the cell expressing the Fas receptor. Both activated T cells and B cells express Fas and undergo clonal deletion by the AICD mechanism. Activated T cells that express both Fas and FasL may be killed by themselves or by each other.
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