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Chinese Journal of Clinical Pharmacology and Therapeutics ›› 2004, Vol. 9 ›› Issue (3): 333-336.

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Antiangiogenic effects of somatostatin and its analogues in rectal cancer

WU Jian, LI Xian-Hai, XIA Xiang-Hou, WANG Ya-Bin, YAN Jing-Yi   

  1. Department of General Surgery, Yijishan Hospital, Wannan Medical College, Wuhu 241001, Anhui, China
  • Received:2003-09-02 Revised:2003-11-24 Online:2004-03-26 Published:2020-11-21

Abstract: AIM: To investigate the correlation between the somatostatin analogues (SS) and angiogenesis in colorectal carcinoma.METHODS: 80 cases of colorectal carcinomas were examined by immunohistochemical staining (S-P method) using anti-SS, anti-VEGF and anti-CD34 (+) monoclonal antibodies.RESULTS: SS positive staining was obtained in 53 out of 80 cases (66.25 %), and mainly in the cytoplasm of tumor cells. Microvessel density (MVD) expression was more intense in the negative group in comparison with others (P < 0.01).A significant correlation was found between the SS, VEGF and TIMP-2.The expression of VEGF in the SS positive group was lower than that in the negative group (P <0.05), while that of TIMP-2 reversed (P < 0.05).CONCLUSION: There is certain antagonism between the expression of SS, VEGF and TIMP-2 in human colon cancer.One of the mechanisms of tumor inhibition by SS may be the interference with the synthesis of growth factors by tumor cells and with transmission of intracellular signals that regulates cell growth.

Key words: colorectal carcinoma, somatostatin, growth factors, rectal cancer

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