Growth inhibitory effect of adenovirus-mediated tissue-targeted expression of ribosomal protein L23 on human colorectal carcinoma cells

  • Authors:
    • Henghu Fang
    • Jingbo Kang
    • Rui Du
    • Xiangfei Zhao
    • Xinhong Zhang
    • Dongqing Ren
    • Yafei Zhang
    • Zejun Lu
    • Shanshan Wu
    • Wei Zheng
    • Juyi Wen
  • View Affiliations

  • Published online on: June 4, 2015     https://doi.org/10.3892/or.2015.4026
  • Pages: 763-770
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Abstract

A large body of evidence has established murine double minute 2 (MDM2) as a crucial negative regulator of p53 and the major suppressor of p53 function in tumors with wild-type (wt)-p53. Therefore, by inhibiting MDM2 one may reactivate p53 in tumor cells, leading to their demise. Previous studies revealed that ribosomal protein L23 (RPL23) inhibited MDM2-mediated p53 ubiquitination through direct binding to MDM2, and subsequently induced the p53 level as well as its activity, suggesting that it may be a candidate for use in tumor gene therapy. In the present study, we developed a recombinant adenoviral vector expressing the RPL23 gene under control of the carcinoembryonic antigen (CEA) promoter (rAd/CEA-RPL23), and using an in vitro system with cultured human colorectal carcinoma LoVo cells harboring the wt-p53 gene, we proved that rAd/CEA-RPL23 infection could induce the accumulation of endogenous wt-p53 protein and thus lead to the inhibition of tumor cell growth via inducing cell cycle arrest and apoptosis. In vivo treatment of rAd/CEA-RPL23 also exhibited a significant inhibitory effect on tumor growth in nude mice bearing LoVo xenografts. Furthermore, we showed that rAd/CEA-RPL23 synergized with classic chemotherapeutic agent 5-fluorouracil (5-FU) and enhanced its activity against LoVo cells in vivo and in vitro. Taken together, the data presented here suggest that CEA promoter-targeted exogenous RPL23 expression could be of therapeutic value against human colorectal carcinoma that retains wt-p53.
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August-2015
Volume 34 Issue 2

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Fang H, Kang J, Du R, Zhao X, Zhang X, Ren D, Zhang Y, Lu Z, Wu S, Zheng W, Zheng W, et al: Growth inhibitory effect of adenovirus-mediated tissue-targeted expression of ribosomal protein L23 on human colorectal carcinoma cells. Oncol Rep 34: 763-770, 2015
APA
Fang, H., Kang, J., Du, R., Zhao, X., Zhang, X., Ren, D. ... Wen, J. (2015). Growth inhibitory effect of adenovirus-mediated tissue-targeted expression of ribosomal protein L23 on human colorectal carcinoma cells. Oncology Reports, 34, 763-770. https://doi.org/10.3892/or.2015.4026
MLA
Fang, H., Kang, J., Du, R., Zhao, X., Zhang, X., Ren, D., Zhang, Y., Lu, Z., Wu, S., Zheng, W., Wen, J."Growth inhibitory effect of adenovirus-mediated tissue-targeted expression of ribosomal protein L23 on human colorectal carcinoma cells". Oncology Reports 34.2 (2015): 763-770.
Chicago
Fang, H., Kang, J., Du, R., Zhao, X., Zhang, X., Ren, D., Zhang, Y., Lu, Z., Wu, S., Zheng, W., Wen, J."Growth inhibitory effect of adenovirus-mediated tissue-targeted expression of ribosomal protein L23 on human colorectal carcinoma cells". Oncology Reports 34, no. 2 (2015): 763-770. https://doi.org/10.3892/or.2015.4026