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Cancer Cell International
Published in: Cancer Cell International 1/2017

Open Access 01-12-2017 | Primary Research

MiR-20a-5p represses the multi-drug resistance of osteosarcoma by targeting the SDC2 gene

Authors: Fangfang Zhao, Youguang Pu, Mingda Cui, Haiyan Wang, Shanbao Cai

Published in: Cancer Cell International | Issue 1/2017

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Abstract

Background

As one of the hallmarks of cancer, chemoresistance hinders curative cancer chemotherapy in osteosarcoma (OS). MicroRNAs (miRNAs) act as key regulators of gene expression in diverse biological processes including the multi-chemoresistance of cancers.

Methods

Based on the CCK8 experiments, we performed an RNA-seq-based miR-omic analysis of osteosarcoma (OS) cells (a multi-chemosensitive OS cell line G-292 and a multi-chemoresistant OS cell line SJSA-1) to detect the levels of miR-20a-5p. We predicted Homo sapiens syndecan 2 (SDC2) as one of the target genes of miR-20a-5p via several websites, which was further validated by detecting their expression of both mRNA and protein level in both the miR-20a-5p-mimic transfected G-292 and miR-20a-5p-antagomiR transfected SJSA-1 cells. The involvement of SDC2 with OS chemoresistance was checked by siRNA-mediated repression or overexpression of SDC2 gene. Cell viability was assessed by CCK8 assay.

Results

We found that the miR-20a-5p level was higher in G-292 cells than in SJSA-1 cells. Forced expression of miR-20a-5p counteracted OS chemoresistance in both cell culture and tumor xenografts in nude mice. As one of miR-20a-5p’s targets, SDC2 was found to mediate the miR-20a-5p-induced repression of OS chemoresistance.

Conclusions

Our results suggest that miR-20a-5p and SDC2 contribute to OS chemoresistance. The key players in the miR-20a-5p/SDC2 axis may be a potential diagnostic biomarker and therapeutic target for OS patients.
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Metadata
Title
MiR-20a-5p represses the multi-drug resistance of osteosarcoma by targeting the SDC2 gene
Authors
Fangfang Zhao
Youguang Pu
Mingda Cui
Haiyan Wang
Shanbao Cai
Publication date
01-12-2017
Publisher
BioMed Central
Published in
Cancer Cell International / Issue 1/2017
Electronic ISSN: 1475-2867
DOI
https://doi.org/10.1186/s12935-017-0470-2

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