MiR-4721, Induced by EBV-miR-BART22, Targets to Enhance the Tumorigenic Capacity of NPC Through the Pathway

Overview

Journal Mol Ther Nucleic Acids

Publisher Cell Press

Date 2020 Nov 24

PMID 33230457

Citations 16

Authors

Zibo Tang

Weifeng Chen

Yan Xu

Xian Lin

Xiong Liu

Yonghao Li

Yiyi Liu

Zhijian Luo

Zhen Liu

Weiyi Fang

Mengyang Zhao

Affiliations

Soon will be listed here.

Abstract

Nasopharyngeal carcinoma (NPC) is prevalent in East and Southeast Asia. In a previous study, Epstein-Barr virus (EBV)-miR-BART22 induces tumor metastasis and stemness and is significantly involved in NPC progression. In the present study, we observed that miR-4721 is induced by EBV-miR-BART22 through phosphatidylinositol 3-kinase (PI3K)/AKT/c-JUN/Sp1 signaling to promote its transcription. In a subsequent study, we observed that miR-4721 serves as a potential oncogenic factor promoting NPC cell cycle progression and cell proliferation and . Mechanism analysis indicated that miR-4721 directly targetes GSK3β and reduces its expression, which therefore elevates β-catenin intra-nuclear aggregation and activates its downstream cell cycle factors, including CCND1 and c-MYC. In clinical samples, miR-4721 and GSK3β are respectively observed to be upregulated and downregulated in NPC progression. Elevated expression of miR-4721 is positively associated with clinical progression and poor prognosis. Our study first demonstrated that miR-4721 as an oncogene is induced by EBV-miR-BART22 via modulating PI3K/AKT/c-JUN/Sp1 signaling to target GSK3β, which thus activates the WNT/β-catenin-stimulated cell cycle signal and enhances the tumorigenic capacity in NPC. miR-4721 may be a potential biomarker or therapeutic target in NPC treatment in the future.

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