Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.4.22.61 (caspase-8)
6,833 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

In this study we show that panaxadiol, a ginseng saponin with a dammarane skeleton, induces apoptotic cell death by depolarization of mitochondrial membrane potential in human hepatoma SK-HEP-1 cells. Sequential activation of caspases-9, -3, and -7, but not of caspase-8, occurs after mitochondrial membrane depolarization and cytochrome c release from the mitochondria of panaxadiol-treated cells. Moreover, Cdk2 kinase activity, but not Cdc2 kinase activity, is markedly upregulated in the early stages of apoptosis. Olomoucine or roscovitine, specific Cdks inhibitors, effectively prevent mitochondrial membrane depolarization as well as apoptotic cell death in panaxadiol-treated cells. Thus, panaxadiol-treatment induces cell death-dependent activation of Cdk2 kinase activity, which is functionally associated with depolarization of mitochondrial membrane potential and subsequent cytochrome c release.
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PMID:Cdk2 activity is associated with depolarization of mitochondrial membrane potential during apoptosis. 1276 26