Enhanced therapeutic efficacy of adenovirus-mediated interleukin-24 gene therapy combined with ionizing radiotherapy for nasopharyngeal carcinoma

  • Authors:
    • Jisheng Liu
    • Yujuan Zhang
    • Peng Sun
    • Yufeng Xie
    • Jim Xiang
    • Jicheng Yang
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  • Published online on: June 19, 2013     https://doi.org/10.3892/or.2013.2550
  • Pages: 1165-1174
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Abstract

Melanoma differentiation-associated gene-7 (mda-7)/interleukin-24 (IL-24), a unique cytokine tumor suppressor, displays ubiquitous antitumor activities and cancer-specific cytotoxicities via multiple signaling pathways. In the present study, we investigated the antitumor effect of adenovirus-mediated IL-24 (AdVIL-24) gene therapy in conjunction with ionizing radiation on CNE-2Z human nasopharyngeal carcinoma (NPC) cells in vitro and in vivo in athymic nude mice, and its potential mechanisms. We demonstrated that AdVIL-24 gene therapy plus ionizing radiotherapy induced enhanced growth inhibition, cell cycle G1 phase arrest and apoptosis in vitro in CNE-2Z human NPC cells and in vivo in CNE-2Z xenografted tumors subcutaneously implanted in athymic nude mice. Mechanistically, AdVIL-24 combined with ionizing radiation led to the substantial upregulation of P21 and P27 cyclin-dependent kinase (CDK) inhibitors, ratio of pro-apoptotic to anti-apoptotic molecules Bax/Bcl-2 and cleaved caspase‑3 as well as downregulation of cyclin E and CDK2 in vitro and in vivo in CNE-2Z human NPC cells. Furthermore, AdVIL-24 plus radiation additively reduced the tumor vessel CD34 expression and microvessel density in vivo. More importantly, AdVIL-24 potentially blocked the radiation-induced enhancement of vascular endothelial growth factor (VEGF), a pro-angiogenic factor. The enhanced antitumor activity against NPC elicited by AdVIL-24 gene therapy combined with ionizing radiotherapy was closely associated with the enhanced induction of G1 phase arrest and apoptosis via additive modulation of cell cycle regulatory molecules and activation of intrinsic apoptotic pathways, and the overlapping inhibition of tumor angiogenesis. Thus, our results suggest that AdVIL-24 gene therapy combined with ionizing radiotherapy may be a novel and effective treatment strategy for human NPC.
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September 2013
Volume 30 Issue 3

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

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Spandidos Publications style
Liu J, Zhang Y, Sun P, Xie Y, Xiang J and Yang J: Enhanced therapeutic efficacy of adenovirus-mediated interleukin-24 gene therapy combined with ionizing radiotherapy for nasopharyngeal carcinoma. Oncol Rep 30: 1165-1174, 2013.
APA
Liu, J., Zhang, Y., Sun, P., Xie, Y., Xiang, J., & Yang, J. (2013). Enhanced therapeutic efficacy of adenovirus-mediated interleukin-24 gene therapy combined with ionizing radiotherapy for nasopharyngeal carcinoma. Oncology Reports, 30, 1165-1174. https://doi.org/10.3892/or.2013.2550
MLA
Liu, J., Zhang, Y., Sun, P., Xie, Y., Xiang, J., Yang, J."Enhanced therapeutic efficacy of adenovirus-mediated interleukin-24 gene therapy combined with ionizing radiotherapy for nasopharyngeal carcinoma". Oncology Reports 30.3 (2013): 1165-1174.
Chicago
Liu, J., Zhang, Y., Sun, P., Xie, Y., Xiang, J., Yang, J."Enhanced therapeutic efficacy of adenovirus-mediated interleukin-24 gene therapy combined with ionizing radiotherapy for nasopharyngeal carcinoma". Oncology Reports 30, no. 3 (2013): 1165-1174. https://doi.org/10.3892/or.2013.2550