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Inhibitory effect of HuR gene small interfering RNA segment on laryngeal carcinoma Hep-2 cell growth

Published online by Cambridge University Press:  02 June 2010

Z Shen*
Affiliation:
Department of Otorhinolaryngology-Head and Neck Surgery, Lihuili Hospital of Ningbo University, China Institute of Biochemistry and Molecular Biology, Ningbo University School of Medicine, China
D Ye
Affiliation:
Department of Otorhinolaryngology-Head and Neck Surgery, Lihuili Hospital of Ningbo University, China Institute of Biochemistry and Molecular Biology, Ningbo University School of Medicine, China
X Zhang
Affiliation:
Department of Otorhinolaryngology-Head and Neck Surgery, Lihuili Hospital of Ningbo University, China Institute of Biochemistry and Molecular Biology, Ningbo University School of Medicine, China
Z Jiang
Affiliation:
Institute of Biochemistry and Molecular Biology, Ningbo University School of Medicine, China
B Xiao
Affiliation:
Institute of Biochemistry and Molecular Biology, Ningbo University School of Medicine, China
J Guo
Affiliation:
Institute of Biochemistry and Molecular Biology, Ningbo University School of Medicine, China
*
Address for correspondence: Zhisen Shen, M.D., Department of Otorhinolaryngology-Head and Neck Surgery, Lihuili Hospital of Ningbo University, Ningbo, 315000, China. Tel.: +86-13906687216 Fax: +86-574-87392232 E-mail: szs7216@sina.com

Abstract

Objectives:

To investigate the effect of the HuR gene on laryngeal carcinoma Hep-2 cell growth, and to analyse correlations between the HuR, cyclooxygenase-2 and survivin genes.

Study design:

Experiment study.

Setting:

Department of Otolaryngology-Head and Neck Surgery, Lihuili Hospital of Ningbo University, Ningbo, a tertiary care centre in China.

Methods:

Copies of a small interfering RNA segment directed against the HuR gene were transfected into Hep-2 cells using LipofectamineTM 2000. The effect of the small interfering RNA segment on Hep-2 cell proliferation was determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Changes in the expression of the HuR, cyclooxygenase-2 and survivin genes were detected by semi-quantitative reverse transcription polymerase chain reaction analysis. Concentrations of the HuR, cyclooxygenase-2 and survivin proteins were evaluated using Western blotting.

Results:

Expression of the HuR, cyclooxygenase-2 and survivin genes, as indicated by messenger RNA and protein levels, was suppressed by the HuR gene small interfering RNA segment in a dose-dependent manner. The proliferation indices of all treated groups were significanlty lower than those of control groups (p < 0.05).

Conclusions:

Impairment of HuR gene expression, using interfering RNA technology, can significantly suppress Hep-2 cell proliferation and induce apoptosis. The HuR gene may be an effective target for gene therapy in patients with laryngeal carcinoma.

Type
Main Articles
Copyright
Copyright © JLO (1984) Limited 2010

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