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Cho, Dong-Hyung; Jo, Yoon Kyung; Hwang, Jung Jin; Lee, Yoo Mee; Roh, Seon Ae; Kim, Jin Cheon
Cancer letters, 02/2009, Letnik: 274, Številka: 1Journal Article
Abstract Autophagy is a catabolic process involved in cell death and in cell protective mechanism. Autophagic cell death is differentiated from apoptosis by the presence of double or multiple-membrane enclosed vesicles, and the ATG proteins are essential for the formation of these autophagic vesicles. Here, we show that ATG6/Beclin-1 is a novel caspase substrate. ATG6 is directly cleaved by caspases in a process inhibited by the pan caspase inhibitor, zVAD. Ectopic expression of ATG6 suppresses cell death while reduction of ATG6 levels by siRNA sensitizes cells to TRAIL-induced cell death. Also, the inhibition of caspases leads to an increase in autophagy. These results suggest that caspase-mediated cleavage of ATG6 links the apoptotic and autophagic signaling pathways.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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