Hexokinase II detachment from the mitochondria potentiates cisplatin induced cytotoxicity through a caspase-2 dependent mechanism.
Hexokinase II detachment from the mitochondria potentiates cisplatin induced cytotoxicity through a caspase-2 dependent mechanism.
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DOI:
10.4161/cc.8.20.9853
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发表时间:
2009-10-15
期刊:
影响因子:
--
通讯作者:
Pastorino JG
中科院分区:
文献类型:
--
作者:
Shulga N;Wilson-Smith R;Pastorino JG
Cancer cells are frequently glycolytic and over-express hexokinase II (HXK II). In cancer cells, the majority of hexokinase II is localized to the mitochondria through interaction with the voltage dependent anion channel (VDAC). Disruption in the binding of hexokinase II to the mitochondria has been shown to promote mitochondrial injury provoked by pro-apoptotic proteins. The present study demonstrates that cisplatin induces the PIDD (P53 induced protein with a death domain) dependent activation of caspase-2. In turn, caspase-2 cleaves and activates Bid, resulting in the oligomerization of Bak and the release of cytochrome c. Notably, the detachment of hexokinase II from the mitochondria markedly potentiates the onset of caspase-2 induced mitochondrial damage, thus resulting in a synergistic induction of cisplatin induced cytotoxicity.
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