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- W2898033178 abstract "Abstract Rheumatoid arthritis fibroblast‐like synoviocytes (RAFLS) proliferate abnormally and resist apoptosis. Geldanamycin (GA) and other HSP90 inhibitors have emerged as promising therapeutic agents that inhibited cancer cell growth. In this study, we explored the effects of HSP90 inhibitor, GA, on tumor necrosis factor (TNF)‐α‐induced proliferation and apoptosis of RAFLS, and the underlying mechanism. Human RAFLS was isolated from the knee joints of patients with RA and subjected to TNF‐α treatment in combination of various concentration of GA. We found that GA dose‐dependently inhibited TNF‐α‐induced RAFLS proliferation as measured, but promoted RAFLS apoptosis. Further mechanistic study identified that GA dose‐dependently attenuated TNF‐α‐mediated activation of mitogen‐activated protein kinases (MAPKs) and nuclear factor‐kappa B (NF‐κB) pathways, both of which are involved in TNF‐α‐mediated RAFLS proliferation. Moreover, GA‐induced apoptosis and mitochondrial damage of RAFLS, as evidenced by increased Bax/Bcl‐2 ratio and mitochondrial cytochrome c release, and enhanced cleavages of caspase‐3, caspase‐9, and poly‐(ADP‐ribose) polymerase. Collectively, our results revealed that chemical inhibition of HSP90 by GA suppressed TNF‐α‐induced proliferation of RAFLSs through the MAPK and NF‐κB signaling pathways and induces RAFLS apoptosis via mitochondria‐dependent pathway. These findings demonstrated for the first time that HSP90 inhibition in RAFLS could be therapeutic beneficial for RA." @default.
- W2898033178 created "2018-10-26" @default.
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- W2898033178 date "2018-10-10" @default.
- W2898033178 modified "2023-09-27" @default.
- W2898033178 title "Chemical inhibition of HSP90 inhibits TNF‐α mediated proliferation and induces apoptosis in human rheumatoid arthritis fibroblast‐like synoviocytes" @default.
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- W2898033178 doi "https://doi.org/10.1002/jcb.27549" @default.
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