Contractile mechanisms of action of gastroprokinetic agents: cisapride, metoclopramide, and domperidone

Title

Contractile mechanisms of action of gastroprokinetic agents: cisapride, metoclopramide, and domperidone

Creator

Orihata M; Sarna SK

Publisher

The American Journal Of Physiology

Date

1994

Subject

Time Factors; Animals; P.H.S.; Research Support; U.S. Gov't; Eating; Non-P.H.S.; Gastrointestinal Motility/drug effects; Cisapride; Dogs; Domperidone/pharmacology; Duodenum/drug effects/physiology; Gastric Emptying/drug effects; Metoclopramide/pharmacology; Piperidines/pharmacology; Pylorus/drug effects/physiology

Description

We investigated the contractile mechanisms of action of three putative gastroprokinetic agents (cisapride, metoclopramide, and domperidone) on the linear phase of gastroduodenal emptying of solid meals in six healthy conscious dogs. The spatial and temporal parameters of gastric, pyloric, and duodenal contractions during the entire period of gastroduodenal emptying, during the 60-min period of drug infusion (ti), and during the postdrug infusion period (tpi) were analyzed by a computer method. Cisapride accelerated the total gastroduodenal emptying time (tfull), metoclopramide had no significant effect, and domperidone delayed the tfull. None of the drugs had a significant effect on gastroduodenal emptying during ti. Both cisapride and metoclopramide enhanced the rate of gastroduodenal emptying during tpi. Cisapride enhanced pyloric and duodenal motor activity but had no significant effect on antropyloroduodenal coordination during tfull and ti. During tpi, cisapride significantly enhanced both the pyloric and duodenal motor activity and antropyloroduodenal coordination. Metoclopramide exhibited only a few significant effects on the frequency, amplitude, duration, and area under contractions in the antrum, pylorus, and duodenum, but it enhanced antropyloroduodenal coordination during tfull and tpi. Domperidone decreased the frequency of corporeal, pyloric, and duodenal contractions and deteriorated antropyloroduodenal coordination by decreasing the frequency of contractions propagating from the antrum or the pylorus to the duodenum. Cisapride and metoclopramide, but not domperidone, increased the mean distance of propagation of duodenal contractions during tfull, ti, and tpi. We conclude that cisapride is more effective in accelerating gastroduodenal emptying because it stimulates the largest number of parameters of gastropyloroduodenal contractions that enhance gastric emptying. Most enhancement of gastric emptying rate with both cisapride and metoclopramide occurs during tpi.
1994

Rights

Article information provided for research and reference use only. PedPalASCNET does not hold any rights over the resource listed here. All rights are retained by the journal listed under publisher and/or the creator(s).

Type

Journal Article

Citation List Month

Backlog

Citation

Orihata M; Sarna SK, “Contractile mechanisms of action of gastroprokinetic agents: cisapride, metoclopramide, and domperidone,” Pediatric Palliative Care Library, accessed May 19, 2024, https://pedpalascnetlibrary.omeka.net/items/show/11887.