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MALAT1 induces osteosarcoma progression by targeting miR‐206/CDK9 axis
Author(s) -
Ren Dong,
Zheng Hao,
Fei Sang,
Zhao JiaLi
Publication year - 2019
Publication title -
journal of cellular physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.529
H-Index - 174
eISSN - 1097-4652
pISSN - 0021-9541
DOI - 10.1002/jcp.26923
Subject(s) - osteosarcoma , malat1 , gene knockdown , cancer research , biology , competing endogenous rna , immunoprecipitation , cell growth , long non coding rna , microbiology and biotechnology , chemistry , cell culture , rna , gene , genetics
Long noncoding RNAs (LncRNAs) have been reported to participate in cancer development, including osteosarcoma. Here, in our study, we observed that lncRNA metastasis‐associated lung adenocarcinoma transcription 1 (MALAT1) was remarkably overexpressed in osteosarcoma. However, the role it plays in osteosarcoma proliferation mediated by miR‐206/cyclin‐dependent kinase 9 (CDK9) axis remains uninvestigated. It was found that miR‐206 was decreased and CDK9 was elevated in human osteosarcoma cells including MG63, Saos‐2, U2OS, and KHOS compared with human osteoblast cell line hFOB 1.19. In addition, it was exhibited that knockdown of MALAT1 was able to inhibit osteosarcoma cell proliferation, which suggested that MALAT1 played an oncogenic role in osteosarcoma development. Bioinformatics analysis indicated that MALAT1 can function as a competing endogenous RNA by sponging miR‐206. Because miR‐206 has been identified as a significant tumor suppressive gene in multiple cancers, we validated that mimics of miR‐206 can restrain osteosarcoma progression. Furthermore, dual‐luciferase reporter assay, RNA binding protein immunoprecipitation, and RNA pull‐down assay demonstrated the correlation between miR‐206 and MALAT1. Besides these, CDK9 was predicted as a downstream gene of miR‐206, and we observed that MALAT1 can regulate osteosarcoma progress by modulating CDK9 expression via sponging miR‐206. In conclusion, our study implied that MALAT1/miR‐206/CDK9 axis can provide novel insights into the biological mechanism of osteosarcoma progression.