Effects of several endothelin receptor antagonists on gastrointestinal transit of guinea pigs.

作者: Kenichi Kuwahara , Yoshio Kitsukawa , Yasuo Suzuki , Yasushi Saito

DOI: 10.1023/A:1005533310335

关键词: Small intestineGastric emptyingGastrointestinal tractBosentanCecumInternal medicineStomachBiologyGastroenterologyEndothelin receptorGuinea 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

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