Abstract
To assess the pharmacophysiological significance of the enteric nervous system and the responses of the human lower esophageal sphincter (LES) to motilin and cisapride, the mechanical responses of esophgeal tissues from six patients with esophageal cancer and seven patients with gastric cancer were investigated. Circular muscle reactions were recorded to evaluate the in vitro esophageal responses to electrical field stimulation (EFS), motilin, and cisapride, evoking the adrenergic and cholinergic nerves before and after treatment with various autonomic nerve blockers. The findings of this study revealed that: cholinergic nerves are mainly involved in the regulation of enteric nerves in the steady state, while nonadrenergic non-cholinergic (NANC) inhibitory nerves also exist; motilin may act both via nerves and also directly on the LES smooth muscle; and cisapride releases acetylcholine from the end of the postganglionic fiber of the cholinergic nerve in human LES thereby inducing contraction of the LES. These results suggest that cholinergic and NANC inhibitory nerves play an important role in human LES, and that motilin and cisapride is clinically useful for improving the impaired LES of patients with gastroesophageal reflux.
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Part of this work was presented at the 15th Annual Conference of Gut Hormones held on July 21, 1994, in Shizuoka, Japan.
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Tomita, R., Tanjoh, K. & Munakata, K. The role of motilin and cisapride in the enteric nervous system of the lower esophageal sphincter in humans. Surg Today 27, 985–992 (1997). https://doi.org/10.1007/BF02385776
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DOI: https://doi.org/10.1007/BF02385776