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Int. J. Mol. Sci. 2014, 15(11), 19729-19740; doi:10.3390/ijms151119729

Overexpression of MicroRNA-30b Improves Adenovirus-Mediated p53 Cancer Gene Therapy for Laryngeal Carcinoma

1,4
and
1,2,3,*
1
Department of Otolaryngology, Head and Neck Surgery, the First Hospital, Shanxi Medical University, 85 South Jiefang Road, Taiyuan 030001, China
2
Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, Taiyuan 030001, China
3
Key Institute and Laboratory of Otolaryngology Affiliated with Shanxi Province, Taiyuan 030001, China
4
Department of Otolaryngology, Head and Neck Surgery, the Second Affiliated Hospital of Nanjing Medical University, 121 Jiangjiayuan Road, Nanjing 210011, China
*
Author to whom correspondence should be addressed.
Received: 22 September 2014 / Revised: 23 October 2014 / Accepted: 24 October 2014 / Published: 29 October 2014
(This article belongs to the Section Biochemistry, Molecular and Cellular Biology)
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Abstract

MicroRNAs play important roles in laryngeal carcinoma and other cancers. However, the expression of microRNAs in paracancerous tissue has been studied less. Here, using laser capture microdissection (LCM), we detected the expression of microRNAs in paracancerous tissues. Among all down-regulated microRNAs in the center area of tumor tissues, only miR-30b expression was significantly reduced in paracancerous tissues compared to surgical margins. Therefore, to further investigate the effect of miR-30b on laryngeal carcinoma, we stably overexpressed miR-30b in laryngeal carcinoma cell line HEp-2 cells. It was found that although there was no significant difference in cell viability between miR-30b overexpressed cells and control HEp-2 cells, p53 expression was obviously enhanced in miR-30b overexpressed cells. Whether miR-30b could improve the anti-tumor effect of adenovirus-p53 (Ad-p53) in laryngeal carcinoma and other cancer cell lines was also evaluated. It was found that in miR-30b overexpressed HEp-2 cells, p53-mediated tumor cell apoptosis was obviously increased both in vitro and in vivo. MDM2-p53 interaction might be involved in miR-30b-mediated anti-tumor effect. Together, results suggested that miR-30b could modulate p53 pathway and enhance p53 gene therapy-induced apoptosis in laryngeal carcinoma, which could provide a novel microRNA target in tumor therapy. View Full-Text
Keywords: laryngeal carcinoma; miR-30b; p53; field cancerization laryngeal carcinoma; miR-30b; p53; field cancerization
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Li, L.; Wang, B. Overexpression of MicroRNA-30b Improves Adenovirus-Mediated p53 Cancer Gene Therapy for Laryngeal Carcinoma. Int. J. Mol. Sci. 2014, 15, 19729-19740.

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