PMID- 17934850 OWN - NLM STAT- MEDLINE DCOM- 20080617 LR - 20220716 IS - 0163-2116 (Print) IS - 0163-2116 (Linking) VI - 53 IP - 5 DP - 2008 May TI - Angiotensin II type 1 receptor antagonist suppress angiogenesis and growth of gastric cancer xenografts. PG - 1206-10 AB - Angiotensin II (Ang II) has been reported to promote tumor progression, tumor growth and angiogenesis in many cancers. We previously observed that angiotensin II type 1 receptors (AT1R) were upregulated in human gastric cancer and may be involved in the progression of gastric cancer. We studied the effects of AT1R antagonist on angiogenesis and growth in gastric cancer xenografts to observe the mechanism action of AT1R in the gastric cancer. The results showed that the growth of gastric cancer cells was significantly suppressed by treatment with AT1R antagonist. In vivo, TCV-116, at doses of both 2 and 5 mg/kg/day, significantly suppressed tumor growth in mice (47.3 and 70.2%). Microvessel density was significantly decreased by TCV-116 (3.4 +/- 0.9 and 2.8 +/- 0.5 per field) compared with the control group (12.9 +/- 1.1 per field), and VEGF expression was significantly suppressed by AT1R antagonist. These results demonstrate that AT1R plays an important role in the progression of gastric cancer. Suppression tumor angiogenesis could be one of the mechanisms by which AT1R antagonist suppresses the growth of gastric cancer. These findings also provide a theoretical basis for the future clinical application of AT1R antagonist against gastric cancer. FAU - Huang, Wei AU - Huang W AD - Department of Gastroenterology, Ruijin Hospital, School of Medicine, Jiaotong University, Shanghai, China. FAU - Wu, Yun-Lin AU - Wu YL FAU - Zhong, Jie AU - Zhong J FAU - Jiang, Feng-Xiang AU - Jiang FX FAU - Tian, Xiang-Long AU - Tian XL FAU - Yu, Li-Fen AU - Yu LF LA - eng PT - Journal Article DEP - 20071013 PL - United States TA - Dig Dis Sci JT - Digestive diseases and sciences JID - 7902782 RN - 0 (Angiotensin II Type 1 Receptor Blockers) RN - 0 (Benzimidazoles) RN - 0 (Biphenyl Compounds) RN - 0 (Tetrazoles) RN - 0 (Vascular Endothelial Growth Factor A) RN - R85M2X0D68 (candesartan cilexetil) SB - IM MH - Administration, Oral MH - Analysis of Variance MH - Angiotensin II Type 1 Receptor Blockers/administration & dosage/*pharmacology MH - Animals MH - Benzimidazoles/administration & dosage/*pharmacology MH - Biphenyl Compounds/administration & dosage/*pharmacology MH - Cell Line, Tumor MH - Humans MH - Immunohistochemistry MH - Mice MH - Mice, Inbred BALB C MH - Mice, Nude MH - Neovascularization, Pathologic/metabolism/*prevention & control MH - Statistics, Nonparametric MH - Stomach Neoplasms/blood supply/*drug therapy/pathology MH - Tetrazoles/administration & dosage/*pharmacology MH - Transplantation, Heterologous MH - Vascular Endothelial Growth Factor A/metabolism EDAT- 2007/10/16 09:00 MHDA- 2008/06/18 09:00 CRDT- 2007/10/16 09:00 PHST- 2007/04/30 00:00 [received] PHST- 2007/08/28 00:00 [accepted] PHST- 2007/10/16 09:00 [pubmed] PHST- 2008/06/18 09:00 [medline] PHST- 2007/10/16 09:00 [entrez] AID - 10.1007/s10620-007-0009-9 [doi] PST - ppublish SO - Dig Dis Sci. 2008 May;53(5):1206-10. doi: 10.1007/s10620-007-0009-9. Epub 2007 Oct 13.