Abstract:
:MicroRNAs (miRNAs) may function as either oncogenes or tumor suppressors in the malignant progression of different tumor types. MiR-663 was recently reported to be decreased and identified as a tumor suppressor in gastric cancer. We also verified its role in repressing cell proliferation of a gastric cancer cell line. In this study, however, miR-663 was found to be upregulated in nasopharyngeal carcinoma (NPC) cells compared with human immortalized nasopharyngeal epithelium cells, using a miRNA microarray, and this higher expression was confirmed in NPC tissue samples. Indeed, inhibition of miR-663 impaired the proliferation of NPC cells in vitro and the NPC tumor growth of xenografts in nude mice. Mechanistically, miR-663 directly targeted p21(WAF1/CIP1) to promote the cellular G1/S transition, as the inhibitory effects of miR-663 on the G1/S transition could be rescued by p21(WAF1/CIP1) silencing. Our results imply that miR-663 may act as an oncogene in NPC. The newly identified miR-663/p21(WAF1/CIP1) axis clarifies the molecular mechanism of NPC cell proliferation and represents a novel strategy for the diagnosis and treatment of patients with NPC.
journal_name
Oncogenejournal_title
Oncogeneauthors
Yi C,Wang Q,Wang L,Huang Y,Li L,Liu L,Zhou X,Xie G,Kang T,Wang H,Zeng M,Ma J,Zeng Y,Yun JPdoi
10.1038/onc.2011.629subject
Has Abstractpub_date
2012-10-11 00:00:00pages
4421-33issue
41eissn
0950-9232issn
1476-5594pii
onc2011629journal_volume
31pub_type
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