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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Cancer+Res
2015 ; 5
(10
): 3198-209
Nephropedia Template TP
gab.com Text
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English Wikipedia
The HSP90 inhibitor 17-PAG effectively inhibits the proliferation and migration
of androgen-independent prostate cancer cells
#MMPMID26693070
Peng R
; Li Z
; Lin Z
; Wang Y
; Wang W
; Hu B
; Wang X
; Zhang J
; Wang Y
; Zhou R
; Lu C
; Shen Y
; Wang J
; Shi G
Am J Cancer Res
2015[]; 5
(10
): 3198-209
PMID26693070
show ga
Castration-resistant prostate cancer (CRPC) ultimately occurs after a period of
treatment with androgen deprivation therapy. Furthermore, CRPC patients can only
derive limited survival benefits from traditional cytotoxic drugs. HSP90, which
is a molecular chaperone, plays a vital role in client protein processing and
maintaining the function of cells. HSP90 is usually overexpressed in prostate
cancer tissues, which makes it a potential target for managing prostate cancer.
Geldanamycin (GA), which was recognized as the first natural HSP90 inhibitor, has
demonstrated potent anti-tumor efficacy in large-scale pre-clinical studies, but
its application in the clinic is not permitted due to its liver toxicity and
unstable physical properties. In this study, we report a new GA derivative,
17-PAG (17-(propynylamino)-17-demethoxygeldanamycin), which demonstrates highly
effective anti-tumor activity against androgen-independent prostate cancer cells.
Treating cells with 17-PAG dose-dependently suppressed proliferation, reduced
colony formation and induced apoptosis of DU-145/C4-2B cells. Moreover, 17-PAG
suppressed the migration and invasion of DU-145/C4-2B cells by regulating
epithelial mesenchymal transition (EMT). 17-PAG also downregulated the HSP90
client proteins, including Her2, EGFR, C-Raf, AKT, p-AKT, and CDK4. Animal assays
confirmed that 17-PAG shows strong anti-tumor effects with no obvious organ
toxicity in DU-145 cell xenografted nude mice. These results provide us with a
potential target for treating androgen-independent prostate cancer in a safe and
effective manner.