Effects of Tegaserod on Ileal Peristalsis of Guinea Pig In Vitro

Journal of Pharmacological Sciences

Hyojin Park²  Sang Won Ji²  Jun Pyo Chung²  Young Ho Lee¹  Sang In Lee² 

[1] Department of Physiology, Yonsei University College of Medicine;Department of Internal Medicine, Yonsei University College of Medicine

关键词: tegaserod;    peristalsis;    Ileum (guinea pig);    prokinetic action;   

DOI  :  10.1254/jphs.94.144

学科分类：药学

来源: Nihon Yakuri Gakkai Henshuubu / Japanese Pharmacological Society

【 摘 要 】

References(29)Cited-By(10)The mechanisms of prokinetic action of tegaserod in the gastrointestinal tract has not been studied in detail. The aim of this study was to investigate the effect of tegaserod on peristaltic reflexes and propagating peristaltic waves in guinea pig ileum. A partitioned organ bath divided into three chambers was used to investigate the effect of tegaserod on peristaltic reflexes. A sensory stimulus was applied to the intermediate chamber, and changes in the circular muscle tension were monitored in a peripheral chamber. Another peristaltic bath was used to investigate the effect of tegaserod on peristaltic waves induced by intraluminal perfusion. Guinea pig ileum exhibited contractions in the circular muscle both orally and anally in response to mucosal stroking. Tegaserod (10−8 – 10−6 M) did not influence the maximal amplitude and the area under the curve of contraction both orally and anally to a mucosal stimulus. Intraluminal perfusion of fluid containing tegaserod (10−8 – 10−6 M) significantly increased the number of peristaltic waves in a concentration-dependent manner (P<0.05). Also, tegaserod (10−8 – 10−6 M) significantly increased the area under the curve of peristaltic waves (P<0.05). It is concluded that tegaserod has prokinetic action on guinea pig ileum by increasing the number of the circular muscle contractions during peristalsis.

【 授权许可】

Unknown