Sci. STKE, 11 May 2004
Apoptosis Threshold for Death
Control of initiator caspases, the proteases that activate signaling pathways that lead to cell death or apoptosis, literally determines whether a cell dies. The regulation of caspase-2 is implicated in a particularly important death response, the response to anticancer drugs that induce genotoxic stress. Tinel and Tschopp report that caspase-2 becomes activated as part of a protein complex they call the PIDDosome. PIDD is a protein expressed in response to the tumor suppressor p53 and interacts with an adaptor protein called RAIDD, which in turn binds to caspase-2. Small increases in the amount of PIDD expressed in cells causes activation of caspase-2 and sensitizes cells to the genotoxic agent doxorubicin.
Citation: Threshold for Death. Sci. STKE 2004, tw169 (2004).
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