Autophagy suppresses the proliferation of renal carcinoma cell

Z.-L. Wang, Q. Deng, T. Chong, Z.-M. Wang

Department of Urology, Second Affiliated Hospital, School of Medicine, Xi’an Jiaotong University, Xi’an, P.R. China. zhenlongw2001@163.com

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• Oncology

OBJECTIVE: To investigate the effetcs of autophagy on the proliferation of renal carcinoma (RCCs).

MATERIALS AND METHODS: Authophagy related protein 7 (Atg7)-overexpressing and knockdown RCC cell lines were established using lentiviral transfection and shRNA interference, respectively. (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) (MTT) was used to determine the Cell growth rate, and western blot was used to determine the expression of protein. In order to establish xenograft animal models, stable transfected cells were injected into nude mice. After that those mice were used to detect the effect of autophagy on the growth of RCC in vivo.

RESULTS: Atg7 overexpression could up-regulate the level of LC3II in RCC cell lines, while Atg7-knockdown suppressed the expression of light chain 3 II (LC3II) in RCC cell lines. Atg7-overexpression cells exhibited a decreased growth profile, while suppressing the expression of Atg7 could accelerate the growth of RCC formed tumors.

CONCLUSIONS: Our data indicated that autophagy could suppress the growth of RCC cells in vivo and in vitro, and autophagy appeared to be a new therapeutic target for treating advanced renal cell carcinoma.

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