Long non-coding RNA-LET is a positive prognostic factor and exhibits tumor-suppressive activity in gallbladder cancer.

Abstract:

:The identification of cancer-associated long non-coding RNAs (lncRNAs) and the investigation of their molecular and biological functions are vital for understanding the molecular biology and progression of cancer. The lncRNA-LET, a newly identified lncRNA, was demonstrated to be down-regulated in hepatocellular cancer. However, little is known about its role in gallbladder cancer. In the present study, an obvious down-regulation of lncRNA-LET was observed in gallbladder cancer compared to their adjacent normal tissues. Meanwhile, patients with low expression of lncRNA-LET have significantly poorer prognosis than those with high expression. We confirmed that hypoxia decreased lncRNA-LET levels in gallbladder cancer cells. Moreover, lncRNA-LET overexpression was further validated to inhibit the invasion of gallbladder cancer cells under hypoxic or normoxic conditions in vitro. We demonstrated that lncRNA-LET overexpression conferred a proliferative advantage to tumor cells under hypoxic conditions. The ectopic expression of lncRNA-LET led to the promotion of cell cycle arrest at G0/G1 phase and to the induction of apoptosis under hypoxic conditions. Ectopic expression of LncRNA-LET also suppressed gallbladder tumor growth in vivo. Our findings indicate that lncRNA-LET may represent a prognostic marker and a potential therapeutic target for gallbladder cancer.

journal_name

Mol Carcinog

journal_title

Molecular carcinogenesis

authors

Ma MZ,Kong X,Weng MZ,Zhang MD,Qin YY,Gong W,Zhang WJ,Quan ZW

doi

10.1002/mc.22215

subject

Has Abstract

pub_date

2015-11-01 00:00:00

pages

1397-406

issue

11

eissn

0899-1987

issn

1098-2744

journal_volume

54

pub_type

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