miR-16-5p Suppresses Progression and Invasion of Osteosarcoma via Targeting at Smad3.

Abstract:

Background:MicroRNAs are known to regulate carcinogenesis of osteosarcoma. Although, miR-16-5p is known to exert inhibitory effects on several forms of cancers, its effects on the growth and invasion of osteosarcoma have not been studied. Methods:We collected human osteosarcoma specimens and adjacent tissues to detect the expression of miR-16-5p by real-time polymerase chain reaction, immunoblotting, and immunohistochemistry. The proliferation, migration, and invasion of MG63 and HOS cells following miR-16-5p overexpression and inhibition were detected with cell counting kit-8, wound healing assay, and Transwell assay, respectively. An expression vector carrying a mutated 3'-untranslated region of mothers against decapentaplegic homolog 3 (Smad3) was constructed. Results:The results showed that miR-16-5p expression was downregulated in osteosarcoma tissues and cells as compared with adjacent counterparts, while Smad3 was overexpressed in osteosarcoma cells. The overexpression of miR-16-5p resulted in the inhibition of the proliferation, migration, and invasion of osteosarcoma cells and enhanced the therapeutic effect of cisplatin. These effects were attenuated with miR-16-5p expression inhibition. In cells transfected with miR-16-5p mimic, Smad3 expression decreased, while this effect was absent in the cells carrying mutated Smad3. Conclusions:Therefore, miR-16-5p inhibits the growth and invasion of osteosarcoma by targeting Smad3.

journal_name

Front Pharmacol

authors

Gu Z,Li Z,Xu R,Zhu X,Hu R,Xue Y,Xu W

doi

10.3389/fphar.2020.01324

subject

Has Abstract

pub_date

2020-08-26 00:00:00

pages

1324

issn

1663-9812

journal_volume

11

pub_type

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