MicroRNA-191-5p promotes the development of osteosarcoma via targeting EGR1 and activating the PI3K/AKT signaling pathway.

A new interesting article has been published in Eur Rev Med Pharmacol Sci. 2019 May;23(9):3611-3620. doi: 10.26355/eurrev_201905_17783. and titled:

MicroRNA-191-5p promotes the development of osteosarcoma via targeting EGR1 and activating the PI3K/AKT signaling pathway.

Authors of this article are:

Chen B, Zheng ZY, Yang JZ, Li XG.

A summary of the article is shown below:

OBJECTIVE: MicroRNA-191 (miR-191) has been reported to be abnormally expressed in human cancers and other diseases. The function of miR-191 was contradictory in different cancers. In the present study, we confirmed the specific function of miR-191-5p in osteosarcoma (OS).PATIENTS AND METHODS: The effects of miR-191-5p on cellular behaviors of OS cells were investigated through MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) and transwell assay. The quantitative Real-time-polymerase chain reaction (qRT-PCR) was applied to examine the expressions of miR-191-5p and early growth response gene 1 (EGR1). Western blot and immunocytochemical assay were used to detect the protein expression of EGR1. The binding relationship between miR-191-5p and EGR1 was confirmed by Dual-Luciferase reporter gene assay. Xenograft tumor formation assay was conducted to examine the in vivo effect of miR-191-5p on tumor growth of OS.RESULTS: MiR-191-5p was upregulated in OS tissues, which was related to poor prognosis of OS patients. Moreover, miR-191-5p promoted cell proliferation, migration and invasion by regulating EGR1 in OS. Furthermore, EGR1 was downregulated in OS tissues, which was associated with poor prognosis of OS patients. MiR-191-5p was found to promote epithelial-mesenchymal transition (EMT) and PI3K/AKT pathway, thus promoting the development of OS.CONCLUSIONS: MiR-191-5p promoted the development of OS via targeting EGR1 and positively regulated the PI3K/AKT signaling pathway.

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