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Published in: Molecular Cancer 1/2018

Open Access 01-12-2018 | Research

Sunitinib-suppressed miR-452-5p facilitates renal cancer cell invasion and metastasis through modulating SMAD4/SMAD7 signals

Authors: Wei Zhai, Saiyang Li, Jin Zhang, Yonghui Chen, Junjie Ma, Wen Kong, Dongkui Gong, Junhua Zheng, Wei Xue, Yunfei Xu

Published in: Molecular Cancer | Issue 1/2018

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Abstract

Purpose

Although microRNAs (miRNAs) were revealed as crucial modulators in tumor metastasis and target therapy, our understanding of their roles in metastatic renal cell carcinoma (mRCC) and Sunitinib treatment was limited. Here we sought to identify human miRNAs that acted as key regulators in renal cancer metastasis and Sunitinib treatment.

Experimental design

We focused on 2 published microarray data to select out our anchored miRNA and then explored the roles of miR-452-5p both in vitro and in vivo, which was downregulated after Sunitinib treatment while upregulated in metastasis renal cell carcinoma (RCC) tissues.

Results

Here, we discovered that treating with Sunitinib, the targeted receptor tyrosine kinase inhibitor (TKI), inhibited renal cancer cell migration and invasion via attenuating the expression of miR-452-5p. The novel identified miR-452-5p was upregulated and associated with poor prognosis in RCC. Preclinical studies using multiple RCC cells and xenografts model illustrated that miR-452-5p could promote RCC cell migration and invasion in vitro and in vivo. Mechanistically, P65 could directly bind to the miR-452-5p promoter and thus transcriptionally induce miR-452-5p expression, which led to post-transcriptionally abrogate SMAD4 expression, thus inhibition of its downstream gene SMAD7.

Conclusion

Our study presented a road map for targeting this newly identified miR-452-5p and its SMAD4/SMAD7 signals pathway, which imparted a new potential therapeutic strategy for mRCC treatment.
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Metadata
Title
Sunitinib-suppressed miR-452-5p facilitates renal cancer cell invasion and metastasis through modulating SMAD4/SMAD7 signals
Authors
Wei Zhai
Saiyang Li
Jin Zhang
Yonghui Chen
Junjie Ma
Wen Kong
Dongkui Gong
Junhua Zheng
Wei Xue
Yunfei Xu
Publication date
01-12-2018
Publisher
BioMed Central
Published in
Molecular Cancer / Issue 1/2018
Electronic ISSN: 1476-4598
DOI
https://doi.org/10.1186/s12943-018-0906-x

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