Angiopoietin-1 and vascular endothelial growth factor expression in human esophageal cancer |
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Authors: | Nagata Junko Kijima Hiroshi Hatanaka Hiroyuki Tokunaga Tetsuji Kamochi Junichiro Abe Yoshiyuki Takagi Atsushi Mine Tetsuya Yamazaki Hitoshi Nakamura Masato Ueyama Yoshito |
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Affiliation: | Department of Pathology, Tokai University School of Medicine, Bohseidai, Isehara-shi, Kanagawa 259-1193, Japan. |
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Abstract: | Angiopoietin-1 (Ang-1) has been shown to act as an angiogenic promoter in embryonic angiogenesis by promoting vascular branching, pericyte recruitment and endothelial survival. Ang-1 expression has not been examined in human esophageal cancer. We examined Ang-1 and vascular endothelial growth factor (VEGF) gene expression in tumors from 45 esophageal cancer patients who underwent surgical resection. Forty (88.9%) of the 45 esophageal cancers revealed Ang-1 gene expression. VEGF121, VEGF165 and VEGF189 isoforms were detected in 93.3 (42/45), 55.6 (25/45) and 26.7% (12/45) of the cases, respectively. Ang-1 gene expression was significantly correlated with VEGF121 and VEGF165 gene expression (P=0.0289 and P=0.0127, respectively, Fisher's test). The results suggest that Ang-1 is associated with neovascularization in the cancer stroma through VEGF net-works in esophageal cancer. |
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