Expression pattern of angiogenic factors and prognosis after hepatic resection in hepatocellular carcinoma: importance of angiopoietin-2 and hypoxia-induced factor-1 alpha

Liver International : Official Journal of the International Association for the Study of the Liver
Hiroshi WadaMorito Monden

Abstract

Hepatocellular carcinoma (HCC) is a hypervascular tumor and angiogenesis plays an important role in its progression. Angiogenesis is regulated by a balance between pro and antiangiogenic molecules. The aim of this study was to investigate the expressions of angiogenic factors and elucidate their roles in angiogenesis in HCC. We investigated immunohistochemical expression of vascular endothelial growth factor (VEGF), angiopoietins (Ang-1 and Ang-2), hypoxia-induced factor-1alpha (HIF-1alpha) and thrombospondin-1 (TSP-1) in 60 specimens of surgically resected HCC. We investigated the relationship between their expressions and clinicopathological factors or prognosis. Ang-2 staining had a significant correlation with the grade of differentiation of HCC cells (P=0.0082). VEGF and Ang-2 expression correlated positively with microvessel density (MVD) (P=0.0061 and 0.0374, respectively). MVD of well-differentiated HCC were significantly lower than those of moderately and poorly differentiated HCC. The disease-free survival time of patients with high Ang-2 and/or HIF-1alpha expression was significantly shorter than that of the low expression group (P=0.0278 and 0.0374, respectively). Our study showed that the expression of VEGF and Ang...Continue Reading

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