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Abstract. Background/Aim: We have reported that embryonic stem cell-expressed Ras (ERas) is expressed in human gastric cancer and is associated with its tumorigenicity. Here, we asked whether ERas plays a role in resistance to chemotherapy in gastric cancer. Materials and Methods: To assess the cytotoxicity of chemotherapeutic agents, ERas-overexpressing human gastric cancer GCIY cells were exposed to anticancer agents, including CPT-11 and inhibitor of mammalian target of rapamycin (mTOR). We also investigated the mechanisms by which ERas induces chemoresistance. Results: ERas-overexpressing clones were significantly more resistant to CPT-11 than were the control (p<0.001). Administration of rapamycin was significantly cytotoxic to the ERas-overexpressing clones compared with the control (p<0.01). Electrophoresis mobility shift assa

Year: 2016
OAI identifier: oai:CiteSeerX.psu:10.1.1.1018.7111
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