Expression of miRNA-146a in nasopharyngeal carcinoma is upregulated by Epstein-Barr virus latent membrane protein 1.

Abstract:

:We aimed to investigate the relationship between miRNA-146a and latent membrane protein 1 (LMP1) of Epstein-Barr virus (EBV) in nasopharyngeal carcinoma (NPC). The expression levels of LMP1 in 40 cases of NPC, 28 cases of chronic nasopharyngitis and NPC cell lines CNE1 and CNE1-GL (in which LMP1 was stably transfected) were detected by immunohistochemical staining. The expression of miRNA-146a in 16 cases of NPC, 13 cases of chronic nasopharyngitis and cell lines was determined by quantitative reverse transcription polymerase chain reaction (qRT-PCR) analysis. A plasmid containing the luciferase gene under the control of miRNA-146a promoter (pri-miRNA-146a) was constructed and transfected into NPC cells, and the luciferase activity was detected. LMP1 was positive in 17.9% (5/28) of chronic nasopharyngitis cases and 62.5% (25/40) of NPC cases (p<0.01). The miRNA-146a levels in NPC were significantly higher than that in chronic nasopharyngitis (p<0.01), and were higher in CNE1-GL cells than those in CNE1 cells (p<0.01). The expression of miRNA-146a in human NPC was elevated by EBV-associated antigen LMP1, probably through the activation of the miRNA-146a promoter.

journal_name

Oncol Rep

journal_title

Oncology reports

authors

Zhao Y,Chen X,Jing M,Du H,Zeng Y

doi

10.3892/or.2012.1933

subject

Has Abstract

pub_date

2012-10-01 00:00:00

pages

1237-42

issue

4

eissn

1021-335X

issn

1791-2431

journal_volume

28

pub_type

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