Title : Suberoylanilide hydroxamic acid induces ROS-mediated cleavage of HSP90 in leukemia cells.

Pub. Date : 2015 Jan

PMID : 25119188






8 Functional Relationships(s)
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1 Suberoylanilide hydroxamic acid induces ROS-mediated cleavage of HSP90 in leukemia cells. Vorinostat heat shock protein 90 alpha family class A member 1 Homo sapiens
2 We found that HSP90 was cleaved to 55 kDa protein after treatment with histone deacetylase (HDAC) inhibitors including suberoylanilide hydroxamic acid (SAHA) in several leukemia cell lines. Vorinostat heat shock protein 90 alpha family class A member 1 Homo sapiens
3 We found that HSP90 was cleaved to 55 kDa protein after treatment with histone deacetylase (HDAC) inhibitors including suberoylanilide hydroxamic acid (SAHA) in several leukemia cell lines. Vorinostat heat shock protein 90 alpha family class A member 1 Homo sapiens
4 The SAHA-induced cleavage of HSP90 was blocked by a pan-caspase inhibitor, z-VAD-fmk, implying that the process is dependent on caspase activity. Vorinostat heat shock protein 90 alpha family class A member 1 Homo sapiens
5 SAHA induced generation of reactive oxygen species (ROS), and the cleavage of HSP90 was blocked by a ROS scavenger N-acetylcystein (NAC). Vorinostat heat shock protein 90 alpha family class A member 1 Homo sapiens
6 Treatment of the cells with caspase 10 inhihitor, but not other inhibitors of caspases activated by SAHA, prevented cleavage of HSP90 by SAHA. Vorinostat heat shock protein 90 alpha family class A member 1 Homo sapiens
7 SAHA-induced ROS generation and HSP90 cleavage were dependent on newly synthesized unknown proteins. Vorinostat heat shock protein 90 alpha family class A member 1 Homo sapiens
8 Taken together, our results suggest that the cleavage of HSP90 by SAHA is mediated by ROS generation and caspase 10 activation. Vorinostat heat shock protein 90 alpha family class A member 1 Homo sapiens