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Silencing Livin induces apoptotic and autophagic cell death, increasing chemotherapeutic sensitivity to cisplatin of renal carcinoma cells

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Tumor Biology

Abstract

Renal cell carcinoma (RCC) accounts for 3 % of all adult malignancies and is the most lethal urological cancer. Livin is a member of the inhibitor of apoptosis protein (IAP) family, which is associated with tumor resistance to radiotherapy and chemotherapy. Clinical data also showed that patients with high tumor grades and stages have higher expression levels of Livin in RCC cells. Autophagy is a survival mechanism activated in response to nutrient deprivation. A possible role of Livin in the autophagy of RCC cells has not been investigated; therefore, this pioneer study was carried out. Livin was silenced in RCC cells (slow virus infection [SVI]-shLivin cells) by lentiviral transfection. Then, mRNA and protein expression levels in the transfected cells were assessed by quantitative fluorescence PCR and Western blotting, respectively. In addition, acridine orange staining and electron microscopy were used to assess autophagy in SVI-shLivin cells. The cisplatin IC50 values for RCC cells were measured by the CCK8 assay. Potent antitumor activities were observed in xenograft mouse models generated with Livin-silenced RCC cells in terms of delayed tumor onset and suppressed tumor growth. These results suggested that Livin silencing could increase the chemotherapeutic sensitivity of RCC cells to cisplatin and induce autophagic cell death. A possible mechanism of Bcl-2 and Akt pathway involvement was discussed specifically in this study. Overall, Livin silencing induces apoptotic and autophagic cell death and increases chemotherapeutic sensitivity of RCC cells to cisplatin.

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Acknowledgments

Thank Master Candidate Yin Lei for Statistical Analysis. This work was supported by the Shandong Key Research and Development Project (no. 2015GSF118055, 2014GGH218036 and 2014GSF118134), Medicine and Healthcare Technology Development Project of Shandong Province (no. 2014WS0341 and 2014WS0353), Natural Science Foundation of Shandong Province (no. 2014ZRB14513 and 2014ZRB14081), and National Natural Science Foundation of China (no.81602227).

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Correspondence to Dongbin Bi.

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Zhiyang Wang and Shuai Liu have contributed equally to this work

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Wang, Z., Liu, S., Ding, K. et al. Silencing Livin induces apoptotic and autophagic cell death, increasing chemotherapeutic sensitivity to cisplatin of renal carcinoma cells. Tumor Biol. 37, 15133–15143 (2016). https://doi.org/10.1007/s13277-016-5395-1

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  • DOI: https://doi.org/10.1007/s13277-016-5395-1

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