A polymorphism site in the pre‑miR‑34a coding region reduces miR‑34a expression and promotes osteosarcoma cell proliferation and migration

Lv,Honglin; Pei,Jingfang; Liu,Hongtao; Wang,Haiyan; Liu,Jun

doi:10.3892/mmr.2014.2582

December-2014 Volume 10 Issue 6

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December-2014 Volume 10 Issue 6

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Article Open Access

A polymorphism site in the pre‑miR‑34a coding region reduces miR‑34a expression and promotes osteosarcoma cell proliferation and migration

Authors:
- Honglin Lv
- Jingfang Pei
- Hongtao Liu
- Haiyan Wang
- Jun Liu
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Affiliations: Department of Spinal Orthopedics, Yantai Yuhuangding Hospital, Medical College of Qingdao University, Yantai, Shandong 264000, P.R. China, Central Laboratory, Yantai Yuhuangding Hospital, Medical College of Qingdao University, Yantai, Shandong 264000, P.R. China, Department of Spinal Orthopedics, Wendeng Orthopedics Hospital, Wendeng, Weihai, Shandong 26440, P.R. China

Copyright: © Lv et al. This is an open access article distributed under the terms of Creative Commons Attribution License [CC BY_NC 3.0].
Pages: 2912-2916
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Published online on: September 18, 2014

https://doi.org/10.3892/mmr.2014.2582
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Abstract

Osteosarcoma (OS) is the most prevalent primary malignant bone tumor in children and young adults, its complex etiology involving a combination of environmental and genetic factors. MicroRNA (miRNA) is a short, non‑coding regulatory RNA molecule that represses gene expression by imperfectly base‑pairing to the 3' untranslated region of target mRNAs. Evidence has shown that alterations in the expression of miRNA are involved in the initiation, progression, and metastasis of human cancers. It is believed that miRNAs function both as tumor suppressors and oncogenes during cancer development. In the present study, three tumor-associated miRNAs (miR‑21, miR‑34a and miR‑146a) coding regions were screened in Chinese‑Han OS patients. A G>A variation in the pre‑miR‑34a coding region was found to be associated with higher OS morbidity. By detecting the mature miR‑34a expression in cells transfected with pre‑miR‑34a expression vectors of different genotypes using quantitative polymerase chain reaction, it was demonstrated that the G>A variation reduced miR‑34a expression in vitro. This was in accordance with the data collected from tumor tissue and patient serum samples. Subsequently, a dual‑luciferase reporter assay and western blot analysis were used to detect the site variation effect on the expression of c‑Met, a target gene of miR‑34a. The G>A variation downregulated the suppression of c‑Met in two OS cell lines. Furthermore, it was found that reduced miR‑34a expression decreased the suppression of OS cell proliferation in vitro. In conclusion, the present study established the association between miR‑34a and the risk of suffering OS in a Chinese Han population by identifying one functional single nucleotide polymorphism site in pre‑miR‑34a. These findings may give insight into the mechanism of OS development and create an opportunity to approach the diagnosis and treatment of OS.

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Journals

International Journal of Molecular Medicine

International Journal of Oncology

Molecular Medicine Reports

Oncology Reports

Experimental and Therapeutic Medicine

Oncology Letters

Biomedical Reports

Molecular and Clinical Oncology

World Academy of Sciences Journal

International Journal of Functional Nutrition

International Journal of Epigenetics

Medicine International

A polymorphism site in the pre‑miR‑34a coding region reduces miR‑34a expression and promotes osteosarcoma cell proliferation and migration

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