摘要
AIM:To investigate the expression of hypoxia-inducible factor (HIF)-2α/endothelial PAS domain protein1 (EPAS1) in hepatocellular carcinoma (HCC).METHODS: Expression of HIF-2α/EPAS1 was investigated immunohistochemically on paraffin-embedded sections from 97 patients with HCC.To further confirm that HIF-2α/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-2α/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-2α/EPASlwas 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-α/EPAS1 overexpression, which supported the correlation of HIF-2α/EPASlup-regulation with tumor angiogenesis. No apparent correlation was observed between HIF-2α/EPAS1 and capsular formation, presence of cirrhosis, and histological grade.CONCLUSION: HIF-2α/EPAS1 is expressed in most of HCC with capsular infiltration and portal vein invasion, which indicates a possible role of HIF-2α/EPAS1 in HCC metastasis.
AIM:To investigate the expression of hypoxia-inducible factor (HIF)-2α/endothelial PAS domain protein1 (EPAS1) in hepatocellular carcinoma (HCC). METHODS:Expression of HIF-2α/EPAS1 was investigated immunohistochemically on paraffin-embedded sections from 97 patients with HCC.To further confirm that HIF-2α/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-2α/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-2α/EPASlwas 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-2α/EPAS1 overexpression,which supported the correlation of HIF-2α/ EPASlup-regulation with tumor angiogenesis.No apparent correlation was observed between HIF-2α/EPAS1 and capsular formation,presence of cirrhosis,and histological grade. CONCLUSION:HIF-2α/EPAS1 is expressed in most of HCC with capsular infiltration and portal vein invasion,which indicates a possible role of HIF-2α/EPAS1 in HCC metastasis.
基金
Supported by the National Key Technologies R and D Program,No.2001BA703B04
