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Nizatidine accelerates gastric emptying of a solid meal in rats

  • Esophageal, Gastric, and Duodenal Disorders
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Abstract

Nizatidine, a new histamine-2-receptor antagonist, stimulates gastrointestinal motility in dogs and gastric emptying of liquids in rats. Effect of nizatidine on gastric emptying of a solid meal was investigated using a novel gastric emptying model in rats. Male Wistar rats (weighing 200–300 g) were supplied with powdered food containing 30 w/w% barium 14 hr before the beginning of the experiment and x-ray photography of rat stomach was taken under light ether anesthesia. Gastric emptying was assessed by percentage of a decrease in area 30 min after drug was injected intraperitoneally. There was a positive correlation between the area of the gastric outline and the weight of the gastric contents (r=0.94,P<0.01). Ether anesthesia itself did not affect gastric emptying. Nizatidine increased gastric emptying dose-dependently (emptied percentage; vehicle: 4.9±1.5%, 1 mg/kg: 7.2±0.4%, 3 mg/kg: 10.4±2.0%, 10 mg/kg: 16.7±4.9%, 30 mg/kg: 25.7±7.4%).N-Desmethyl nizatidine (NDM) also stimulated gastric emptying, but nizatidineS-oxide, cimetidine, an famotidine had no significant effects on gastric emptying. Nizatidine and neostigmine, but not NDM, at a subthreshold dose accelerated gastric emptying treated with a low dose of acetylcholine (0.1 mg/kg). Atropine (2 mg/kg, −30 min) did not modulate the gastroprokinetic action of nizatidine, but blocked that of NDM. These findings suggest that this noninvasive method may allow measurement of gastric emptying of solids accurately and that nizatidine and NDM facilitate gastric emptying probably mediated by a direct and/or an indirect (acetylcholinesterase inhibition) cholinergic mechanism.

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Authors and Affiliations

  1. Fourth Department of Internal Medicine, Aichi Medical University, 480-11, Aichi, Japan

    Hiroshi Kaneko MD, Terunori Mitsuma MD, Kiyoshi Uchida MD, Hirofumi Nagai MD, Masatoshi Harada MD &  Hiroshi Kotera MD

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  1. Hiroshi Kaneko MD
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  2. Terunori Mitsuma MD
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  3. Kiyoshi Uchida MD
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  4. Hirofumi Nagai MD
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  5. Masatoshi Harada MD
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  6. Hiroshi Kotera MD
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Kaneko, H., Mitsuma, T., Uchida, K. et al. Nizatidine accelerates gastric emptying of a solid meal in rats. Digest Dis Sci 40, 2043–2051 (1995). https://doi.org/10.1007/BF02208677

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  • DOI: https://doi.org/10.1007/BF02208677

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