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Histamine‐enhanced contractile responses of gastric smooth muscle via interstitial cells of Cajal in the Syrian hamster
Author(s) -
Naganuma S.,
Shiina T.,
Yasuda S.,
Suzuki Y.,
Shimizu Y.
Publication year - 2018
Publication title -
neurogastroenterology and motility
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.489
H-Index - 105
eISSN - 1365-2982
pISSN - 1350-1925
DOI - 10.1111/nmo.13255
Subject(s) - histamine , interstitial cell of cajal , enterochromaffin like cell , stomach , medicine , endocrinology , tetrodotoxin , hamster , motility , biology , histamine h2 receptor , chemistry , gastric acid , antagonist , receptor , microbiology and biotechnology , smooth muscle
Background Gastric motility is controlled by the autonomic and enteric nervous systems and by interstitial cells of Cajal ( ICC s). Although histamine is known to be released from enterochromaffin‐like cells in the gastric mucosa, its regulatory roles in gastric motility are still controversial. Therefore, we investigated the functional roles of histamine in gastric motility. Methods Stomach preparations from hamsters were used because the stomach of hamsters can be easily separated into the forestomach and the glandular stomach. A whole preparation of the stomach was mounted in a Magnus tube, and mechanical responses were recorded using a force transducer. Key Results Exogenous application of histamine had little effect on contractile activity of the glandular stomach. In contrast, the monoamine evoked regular, periodic contractions in the forestomach. An H1 receptor agonist reproduced the contractile responses and an H1 receptor antagonist blocked histamine‐evoked contractions. Atropine and tetrodotoxin did not affect the histamine‐evoked contractions. Pretreatment with drugs that inhibit the activity of ICC s abolished the effects of histamine. Conclusion & Inferences The findings suggest that histamine regulates gastric motility by acting on ICC s via H1 receptors in the hamster. The remarkable ability of histamine to induce rhythmic contractions would be useful for treatment of gastric dysmotility.