title: 17-DMCHAG, a new geldanamycin derivative, inhibits prostate cancer cells through Hsp90 inhibition and survivin downregulation.
abstract: Heat shock protein 90 (Hsp90) is a molecular chaperone involved in the stability of many client proteins, including androgen receptor (AR) and survivin, making Hsp90 an attractive molecular therapeutic target for prostate cancer. Several Hsp90 inhibitors have shown antitumor activity in various preclinical models and in clinical trials. Geldanamycin is a well-known inhibitor of Hsp90, but its associated liver toxicity limited its clinical development. Here, we report a highly effective and low-hepatotoxic geldanamycin derivative that exhibits antitumor activity against human prostate cancer cells. Treatment of cells with 17-DMCHAG (17-(6-(3,4-dimethoxycinnamamido)hexylamino)-17-demethoxy-geldanamycin) dose-dependently suppressed the proliferation, reduced colony formation and induced apoptosis of human prostate cancer cell lines. 17-DMCHAG exhibits anti-invasive and anti-migratory activities in prostate cancer cells through down-regulating of transcription factors Zeb1, Snail1, Slug, and mesenchymal marker Vimentin, while up-regulating the epithelial marker of E-cadherin. Furthermore, 17-DMCHAG treatment damaged the Hsp90/AR and Hsp90/survivin complexes and induced the proteasome-dependent degradation of AR and survivin, then inhibited the activity of these two proteins. In vivo, we observed that 17-DMCHAG showed strong antitumor effects in LNCaP and DU-145 cell-xenografted nude mice. Thus, 17-DMCHAG is a potential treatment for prostate cancer.
authors: Department of Urology, The Fifth People's Hospital of Shanghai, Urology Research Center, Fudan University, Shanghai 200240, China.
authors: Jifeng
authors: J
authors: Wang
authors: Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, Shandong 250012, China.
authors: Zhenyu
authors: Z
authors: Li
authors: Department of Urology, The Fifth People's Hospital of Shanghai, Urology Research Center, Fudan University, Shanghai 200240, China.
authors: Zhiyuan
authors: Z
authors: Lin
authors: Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, Shandong 250012, China.
authors: Baobing
authors: B
authors: Zhao
authors: Department of Urology, The Fifth People's Hospital of Shanghai, Urology Research Center, Fudan University, Shanghai 200240, China.
authors: Yang
authors: Y
authors: Wang
authors: Department of Urology, The Fifth People's Hospital of Shanghai, Urology Research Center, Fudan University, Shanghai 200240, China.
authors: Ruixian
authors: R
authors: Peng
authors: Department of Urology, The Fifth People's Hospital of Shanghai, Urology Research Center, Fudan University, Shanghai 200240, China.
authors: Meifang
authors: M
authors: Wang
authors: Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, Shandong 250012, China.
authors: Chunhua
authors: C
authors: Lu
authors: Department of Urology, The Fifth People's Hospital of Shanghai, Urology Research Center, Fudan University, Shanghai 200240, China. Electronic address: dr.sgw@189.cn.
authors: Guowei
authors: G
authors: Shi
authors: Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, Shandong 250012, China. Electronic address: yshen@sdu.edu.cn.
authors: Yuemao
authors: Y
authors: Shen
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000494:pharmacology*; D016227:Benzoquinones / Q000494:pharmacology*; D045744:Cell Line, Tumor; D015536:Down-Regulation / Q000187:drug effects; D018841:HSP90 Heat-Shock Proteins / Q000037:antagonists & inhibitors* / Q000378:metabolism; D006801:Humans; D051034:Inhibitor of Apoptosis Proteins / Q000378:metabolism*; D047029:Lactams, Macrocyclic / Q000494:pharmacology*; D008297:Male; D051379:Mice; D008819:Mice, Nude; D064129:Prostatic Neoplasms, Castration-Resistant / Q000188:drug therapy* / Q000378:metabolism; D011897:Random Allocation; D000077022:Survivin; D023041:Xenograft Model Antitumor Assays
chemical_list: C000598631:17-(6-(3,4-dimethoxycinnamamido)hexylamino)-17-demethoxy-geldanamycin; D000903:Antibiotics, Antineoplastic; C107489:BIRC5 protein, human; D016227:Benzoquinones; D018841:HSP90 Heat-Shock Proteins; D051034:Inhibitor of Apoptosis Proteins; D047029:Lactams, Macrocyclic; D000077022:Survivin
keywords: AR; Geldanamycin derivative; Hsp90; Prostate cancer; Survivin