Abstract：
:Melanoma is a malignant tumor. The acquisition of stemness of melanoma cells aggravates the malignant transformation, which can be regulated by microRNAs (miRNAs, miR). MiR-363-3p is a key tumor-related miRNA, but its role in stemness and melanoma cells is still unknown. Presently, miR-363-3p, induced by hypoxia inducible factor (HIF)-2α, played a positive role in the stemness of melanoma cells. The levels of miR-363-3p and HIF-2α were upregulated in melanoma cell lines. Overexpression of HIF-2α significantly increased the levels of miR-363-3p. However, both HIF-2α knockdown and miR-363-3p inhibition inhibited the levels of the stemness markers (CD133, CD271, Jarid1B, and Nanog). Furthermore, the levels of miR-363-3p and HIF-2α were upregulated in fluorescence activated cell sorting (FACS)-sorted CD271high/+ cells. Whereas miR-363-3p depletion reduced the proportion and the spheroidization of the CD271high/+ cells, decreased the levels of CD133, CD271, Jarid1B and Nanog with restrained proliferative activity of CD271high/+ cells. Additionally, miR-363-3p was confirmed a key downstream of HIF-2α. Intriguingly, cyclin-dependent kinase inhibitor 1A [CDKN1A, p21(Cip1/Waf1)], a key inhibitor of S-phase DNA synthesis and cell cycle progression, was confirmed a target gene of miR-363-3p by luciferase reporter gene assay. The protein levels of CD133, CD271, Jarid1B and Nanog were upregulated with enhanced proliferative activity of CD271high/+ cells by inhibition of p21 in melanoma cells. In conclusion, miR-363-3p is induced by HIF-2α to promote the stemness of melanoma cells via inhibiting p21. The present study provides novel insights that HIF-2α/miR-363-3p/p21 signaling may be a potential target of research and therapy of melanoma.
journal_name
Neoplasmajournal_title
Neoplasmaauthors
Hao T,Li CX,Ding XY,Xing XJdoi
10.4149/neo_2018_180828N655subject
Has Abstractpub_date
2019-05-23 00:00:00pages
427-436issue
3eissn
0028-2685issn
1338-4317pii
180828N655journal_volume
66pub_type
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