Expression of HIF-2alpha/EPAS1 in hepatocellular carcinoma.

Abstract:

AIM:To investigate the expression of hypoxia-inducible factor (HIF)-2alpha/endothelial PAS domain protein1 (EPAS1) in hepatocellular carcinoma (HCC). METHODS:Expression of HIF-2alpha/EPAS1 was investigated immunohistochemically on paraffin-embedded sections from 97 patients with HCC. To further confirm that HIF-2alpha/EPAS1 in HCC tissues also correlated with angiogenesis, a parallel immunohistchemistry study of vascular endothelial growth factor (VEGF) was performed on these 97 cases. RESULTS:HIF-2alpha/EPAS1 could be detected in 50 of 97 cases (51.6%), including 19 weakly positive (19.8%), and 31 strongly positive (31.1%), the other 47 cases were negative (48.4%). The expression of HIF-2alpha/EPAS1was significantly correlated with tumor size, capsule infiltration, portal vein invasion, and necrosis. A parallel immunohistochemical analysis of VEGF demonstrated its positive correlation with capsule infiltration, portal vein invasion, and HIF-2alpha/EPAS1 overexpression, which supported the correlation of HIF-2alpha/EPAS1up-regulation with tumor angiogenesis. No apparent correlation was observed between HIF-2alpha/EPAS1 and capsular formation, presence of cirrhosis, and histological grade. CONCLUSION:HIF-2alpha/EPAS1 is expressed in most of HCC with capsular infiltration and portal vein invasion, which indicates a possible role of HIF-2alpha/EPAS1 in HCC metastasis.

journal_name

World J Gastroenterol

authors

Bangoura G,Yang LY,Huang GW,Wang W

doi

10.3748/wjg.v10.i4.525

keywords:

subject

Has Abstract

pub_date

2004-02-15 00:00:00

pages

525-30

issue

4

eissn

1007-9327

issn

2219-2840

journal_volume

10

pub_type

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