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Here we studied the mechanism by which heat shock protein 70 (Hsp70) prevents Bax activation during ultraviolet (UV)-induced apoptosis. UV treatment led to c-Jun N-terminal kinase (JNK) phosphorylation, Bim redistribution and subsequent Bax activation. Bim depletion caused a smaller reduction in apoptosis than that by JNK inhibition, indicating that Bim activation is not entirely responsible for induction...
Bcl-2-interacting mediator of cell death (Bim) has been considered to initiate intrinsic apoptotic pathway through Bax activation. Previous studies indicated that BimL was involved in UV-induced apoptosis, but it remains unclear whether Bim activates Bax by directly engaging it or by releasing it from pro-survival relatives such as Bcl-xL. In this study, we attempt to determine the interactions between...
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