The novel gene HA117 promotes in vitro and in vivo drug resistance in mouse colon tumor cells

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Abstract

In this study, we characterized the role of HA117, a novel gene we previously identified, in drug resistance in vitro and in vivo. Briefly, CT26 cells expressing HA117 were obtained by infection with a recombinant adenovirus, and tested for drug sensitivity by methyl thiazolyl tetrazolium assay. In addition, the effect of HA117 on drug sensitivity was assessed in CT26 colon tumors transplanted into nude mice. In vitro, expression of HA117 increased the resistance of CT26 cells to 5-fluorouracil 2.75 times (P<0.05). Similarly, expression of HA117 in subcutaneously xenografted CT26 colon cancer significantly lowered its sensitivity to 5-fluorouracil (P<0.05). Collectively, the results suggest that HA117 regulates the development of drug resistance in CT26 cells in vitro and in vivo.

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Acknowledgements

This study was a Surface project of the National Natural Science Foundation of China (No. 30471985). GZ thanks his supervisor, Professor Youhua Xu, for useful advice on writing, and for trying her best to improve the paper.

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Correspondence to G H Zheng.

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The authors declare no conflict of interest.

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