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Knockdown of MSI1 inhibited the cell proliferation of human osteosarcoma cells by targeting p21 and p27
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Knockdown of MSI1 inhibited the cell proliferation of human osteosarcoma cells by targeting p21 and p27
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Knockdown of MSI1 inhibited the cell proliferation of human osteosarcoma cells by targeting p21 and p27
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Journal Article
Knockdown of MSI1 inhibited the cell proliferation of human osteosarcoma cells by targeting p21 and p27
2017
Overview
Osteosarcoma is the most common type of primary bone cancer in children and adolescents, but its mechanism remains unclear. Musashi RNA-binding protein 1 (MSI1) is highly expressed in certain cancer types and functions as a putative progenitor/stem cell marker. In the present study, it was demonstrated that MSI1 expression in osteosarcoma tissue was higher compared with in the paraneoplastic tissue samples. Knockdown of MSI1 using shRNA in MG-63 and HOS cells inhibited cell proliferation in vitro and tumor formation in vivo, suggesting that MSI1 serves an essential role in osteosarcomagenesis. Further investigations demonstrated that the knockdown of MSI1 leads to the cell cycle arrest at G0/G1 phase, and the upregulation of p21 and p27 protein expression in osteosarcoma cells. Additionally, luciferase assays demonstrated that MSI1 can bind to the 3′ untranslated regions of p21 and p27 mRNA. In conclusion, the results of the present study suggest that the knockdown of MSI11 can suppress cell proliferation of osteosarcoma by targeting p21 and p27 and subsequently inhibiting cell cycle progression.
