Chen BJ, Zeng S, Xie R, Hu CJ, Wang SM, Wu YY, Xiao YF, Yang SM. hTERT promotes gastric intestinal metaplasia by upregulating CDX2 via NF-κB signaling pathway.
Oncotarget 2018;
8:26969-26978. [PMID:
28460480 PMCID:
PMC5432311 DOI:
10.18632/oncotarget.15926]
[Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 02/20/2017] [Indexed: 12/17/2022] Open
Abstract
Background
hTERT has been reported involved in the proliferation and metastasis of gastric cancer, but the role of hTERT in gastric intestinal metaplasia, a premalignant lesion of the gastric mucosa was unknown. The aim of the present study was to investigate the role of hTERT in GIM and the effect of hTERT on CDX2 expression in gastric cells.
Results
Experiments showed that expression of hTERT was significantly higher in GIM than in normal gastric mucosa. Moreover, hTERT increased the KLF4 level via NF-κB during GIM. Furthermore, KLF4 is involved in the up-regulation of CDX2 induced by hTERT, and hTERT can interact with p50, thereby increasing the level of CDX2.
Materials and Methods
Immunohistochemistry was used to detect the expression of hTERT in gastric intestinal metaplasia tissue. Then, effect of hTERT on the expression of CDX2 was detected by qRT-PCR, WB and dual luciferase experiment. The role of p65 and p50 in the regulation of CDX2 were further detected by WB, CO-IP and ChIP.
Conclusions
We may conclude that hTERT promotes GIM by up-regulating CDX2 via NF-κB signaling pathway.
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