期刊
CELL DEATH & DISEASE
卷 5, 期 -, 页码 -出版社
SPRINGERNATURE
DOI: 10.1038/cddis.2014.297
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类别
资金
- National Natural Sciences Foundation of China [81301794]
- Postdoctoral 52nd Foundation of China [2012M521701]
- Technology innovation seedling cultivation project of Sichuan province [0030405301429]
- National science and technology major projects [2009ZX09503-020]
Paclitaxel is one of the most effective chemotherapy drugs for advanced cervical cancer. However, acquired resistance of paclitaxel represents a major barrier to successful anticancer treatment. In this study, paclitaxel-resistant HeLa sublines (HeLa-R cell lines) were established by continuous exposure and increased autophagy level was observed in HeLa-R cells. 3-Methyladenine or ATG7 siRNA, autophagy inhibitors, could restore sensitivity of HeLa-R cells to paclitaxel compared with parental HeLa cells. To determine the underlying molecular mechanism, differentially expressed proteins between HeLa and HeLa-R cells were identified by two-dimensional gel electrophoresis coupled with electrospray ionization quadrupole time-of-flight MS/MS. We found glycolysis-associated proteins were upregulated in HeLa-R cell lines. Inhibition of glycolysis by 2-deoxy-D-glucose or koningic acid could decrease autophagy and enhance sensitivity of HeLa-R cells to paclitaxel. Moreover, glycolysis could activate HIF1-alpha. Downregulation of HIF1-alpha by specific siRNA could decrease autophagy and resensitize HeLa-R cells to paclitaxel. Taken together, a possible Warburg effect activated HIF1-alpha-mediated signaling-induced autophagic pathway is proposed, which may provide new insight into paclitaxel chemoresistance.
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