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- W1740740591 abstract "Cancerous inhibitor of protein phosphatase 2A (CIP2A) is a recently identified oncoprotein. Here, we investigated its role in the formation of multidrug resistance (MDR) of cervical adenocarcinoma in vitro and in vivo. MTT assay showed that knockdown of CIP2A expression increased the drug sensitivity of HeLa and Dox-resistant HeLa cells (HeLa-Dox) to doxorubicin, cisplatin, and paclitaxel significantly, while overexpression of CIP2A decreased the sensitivity of HeLa cells to chemo-drugs dramatically. When treated with different chemotherapeutics, CIP2A and P-glycoprotein (P-gp) protein levels were increased in HeLa cells simultaneously. In accordance with it, knockdown or overexpression of CIP2A expression inhibited or increased the P-gp expression in the transcription level separately. The effects of CIP2A on P-gp expression was achieved partly through its regulation on the transcription factor E2F1. Moreover, the interference of CIP2A could decrease the P-gp protein activity elucidated by Rhodamine 123 (Rh123) efflux assay in HeLa and HeLa/Dox cells. In the in vivo level, confocal microscopy data demonstrated the strong co-localization of CIP2A and P-gp protein in HeLa cells, and CIP2A protein expression was significantly associated with that of P-gp in cervical adenocarcinoma tissues. Thus, CIP2A is involved in regulating multidrug resistance of cervical adenocarcinoma upon chemotherapy by enhancing P-gp expression through E2F1. CIP2A may be an attractive target in anticancer strategies to improve the effect of chemotherapy in cervical adenocarcinoma." @default.
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- W1740740591 date "2015-09-24" @default.
- W1740740591 modified "2023-09-23" @default.
- W1740740591 title "CIP2A is associated with multidrug resistance in cervical adenocarcinoma by a P-glycoprotein pathway" @default.
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- W1740740591 doi "https://doi.org/10.1007/s13277-015-4032-8" @default.
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