作者: Kenichi Kuwahara , Yoshio Kitsukawa , Yasuo Suzuki , Yasushi Saito
关键词: Small intestine 、 Gastric emptying 、 Gastrointestinal tract 、 Bosentan 、 Cecum 、 Internal medicine 、 Stomach 、 Biology 、 Gastroenterology 、 Endothelin receptor 、 Guinea pig
摘要: This study was undertaken to investigate the effects of endothelinA receptor antagonist (ETA-RA) BQ485; ETB-RA BQ788, and nonselective ETA/B-RA Bosentan on gastrointestinal transit guinea pigs. We further analyzed distribution ET-R subtypes smooth muscle cells (SMC) tract their direct involvement SMC in transit. A pig model used measure intestinal The (100 mg/kg, per os), BQ485 (1 intraperitoneally) BQ788 stomach, small intestine, colon were evaluated. separated from cecum, by collagenase each part binding assay. Gastric significantly inhibited BQ485, Bosentan. Small not affected any these agents. ETA-R ETB-R widely distributed colon. ratio 1:3 but 1:10 total number 1:3:9:1. These results indicate that both are strongly involved stomach However, discrepancy between various antagonists suggests is directly