title: Absence of effect of somatostatin on the guinea pig gallbladder.
abstract: The effect of somatostatin (GH-RIH) on cholecystokinin octapeptide (OP-CCK) or acetylcholine (ACh) induced contraction of the guinea pig gallbladder was evaluated in vitro. GH-RIH failed to inhibit the muscle contraction induced by OP-CCK or ACh. To correlate with the in vitro results, the effect of GH-RIH on OP-CCK induced contraction of the gallbladder was evaluated in the guinea pig in vivo. GH-RIH did not affect the OP-CCK induced contraction of the gallbladder. Our results suggest that GH-RIH does not have direct inhibitory effect on the contraction of the guinea pig gallbladder induced by OP-CCK or ACh.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D002766:Cholecystokinin / Q000031:analogs & derivatives / Q000494:pharmacology; D005260:Female; D005704:Gallbladder / Q000187:drug effects* / Q000502:physiology; D006168:Guinea Pigs; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects; D012844:Sincalide; D013004:Somatostatin / Q000494:pharmacology*
chemical_list: D013004:Somatostatin; D002766:Cholecystokinin; D012844:Sincalide; D000109:Acetylcholine