COL11A1 confers chemoresistance on ovarian cancer cells through the activation of Akt/c/EBPβ pathway and PDK1 stabilization

doi:10.18632/oncotarget.4250

CNU IR > Pharmacy and Science > Dept. of Cosmetic Science and institute of cosmetic science > Periodical Articles > Item 310902800/29753

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/29753

Title:	COL11A1 confers chemoresistance on ovarian cancer cells through the activation of Akt/c/EBPβ pathway and PDK1 stabilization
Authors:	Wu, Yi-Hui Chang, Tzu-Hao Huang, Yu-Fang Chen, Chien-Chin Chou, Cheng-Yang
Contributors:	化粧品應用與管理系
Keywords:	epithelial ovarian carcinoma chemoresistance collagen type XI alpha 1 Akt PDK1
Date:	2015-09
Issue Date:	2016-04-19 19:06:57 (UTC+8)
Publisher:	Impact Journals Llc
Abstract:	Chemoresistance to anticancer drugs substantially reduces survival in epithelial ovarian carcinoma (EOC). Here, microarray analysis showed that collagen type XI alpha 1 (COL11A1) is a chemotherapy response-associated gene. Chemoresistant cells expressed higher COL11A1 and c/EBP beta than chemosensitive cells. COL11A1 or c/EBP beta downregulation suppressed chemoresistance, whereas COL11A1 overexpression attenuated sensitivity to cisplatin and paclitaxel. The c/EBP beta binding site in the COL11A1 promoter was identified as the major determinant of cisplatin-and paclitaxel-induced COL11A1 expression. Immunoprecipitation and immunofluorescence showed that in resistant cells, Akt and PDK1 were highly expressed and that anticancer drugs enhanced binding activity between COL11A1 and PDK1 binding and attenuated PDK1 ubiquitination and degradation. Conversely, chemosensitive cells showed decreased activity of COL11A1 binding to PDK1 and increased PDK1 ubiquitination, which were reversed by COL11A1 overexpression. Analysis of 104 EOC patients showed that high COL11A1 mRNA levels are significantly associated with poor chemoresponse and clinical outcome.
Relation:	Oncotarget, v.6 n.27, pp.23748-23763
Appears in Collections:	[Dept. of Cosmetic Science and institute of cosmetic science] Periodical Articles

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