Oncotarget

Research Papers:

Gold nano-particles (AuNPs) carrying anti-EBV-miR-BART7-3p inhibit growth of EBV-positive nasopharyngeal carcinoma

Longmei Cai _, Jinbang Li, Xiaona Zhang, Yaoyong Lu, Jianguo Wang, Xiaoming Lyu, Yuxiang Chen, Jinkun Liu, Hongbing Cai, Ying Wang and Xin Li

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Oncotarget. 2015; 6:7838-7850. https://doi.org/10.18632/oncotarget.3046

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Abstract

Longmei Cai1,*, Jinbang Li1,*, Xiaona Zhang1,4,*, Yaoyong Lu1,5,*, Jianguo Wang1, Xiaoming Lyu1,3, Yuxiang Chen1, Jinkun Liu2, Hongbing Cai2, Ying Wang1, Xin Li1

1Cancer Research Institute, Southern Medical University, Guangzhou 510515, China

2School of Chinese Traditional Medicine, Southern Medical University, Guangzhou 510515, China

3Central Medical Laboratory, The Third Affiliated Hospital, Southern Medical University, Guangzhou 510515, China

4The Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China

5Department of Radiation Oncology, Gaozhou People's Hospital, Gaozhou 525200, China

* These authors contributed equally.

Correspondence to:

Xin Li, e-mail: xinli268@gmail.com

Ying Wang, e-mail: ningmengquan@gmail.com

Hongbing Cai, e-mail: chbing2008@126.com

Keywords: Nasopharyngeal carcinoma, EBV-miR-BART7, tumorigenesis, therapeutic experiment

Received: September 15, 2014     Accepted: January 07, 2015     Published: February 19, 2015

ABSTRACT

Epstein-Barr virus (EBV) infection is a major etiological factor for nasopharyngeal carcinoma (NPC). Several EBV-encoded BART miRNAs have been associated with viral latency, immune escape, cell survival, cell proliferation and apoptosis. Here, we report that EBV-miR-BART7-3p, an EBV-encoded BART miRNA highly expressed in NPC, was correlated with cell-cycle progression in vitro and increased tumor formation in vivo. This viral miRNA stimulated the PTEN/PI3K/Akt pathway and induced c-Myc and c-Jun. Knockdown of PTEN mimicked EBV-miR-BART7-3p-induced tumorigenic phenotype. Based on these results, we conducted a therapeutic experiment by using gold nano-particles (AuNPs) carrying anti-EBV-miR-BART7-3p. Silencing of EBV-miR-BART7-3p reduced tumor growth in animal model. We conclude that EBV-miR-BART7-3p favors carcinogenesis, representing a potential target for miRNA-based therapy.


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