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Effect of vagotomy and/or antrectomy on gastric secretion stimulated by intravenous infusion of bethanechol chloride

Study on rats with gastric fistula

Abstract

The interdigestive phase of gastric secretion was investigated for 24 hr in rats bearing permanent gastric fistulas. Intact controls, vagotomized, antrectomized and vagotomized-antrectomized animals were studied. Vagotomy, alone or combined with antrectomy, abolished the secretory function of parietal and zymogenic cells during the spontaneous interdigestive phase of secretion. This was considered due to the fact that the interdigestive secretion is vagus dependent and represents a true cephalic phase. Antrectomy did not result in the decrease of spontaneous secretion of HCl or pepsin. Intra-arterial stimulation with a stable choline ester, bethanechol, produced adequate secretory response in intact rats and partially restored the function of parietal cells in vagotomized rats. The action of bethanechol on HCl secretion in antrectomized rats was less marked. However, bethanechol has a very marked stimulatory effect on the secretion of pepsin in intact, vagotomized and antrectomized rats. Sensitivity of gastric mucosa to bethanechol was nearly abolished in vagotomized-antrectomized rats.

It appears from this experiment that interdigestive, spontaneous secretion of HCl and pepsin in rats is vagus dependent. Under the conditions of the present study, no action of endogenous gastrin was demonstrated during the interdigestive phase of gastric secretion.

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The technical assistance of Mr. G. Chmura, Mrs. T. Hoogen, Mrs. M. McCubbin and Mr. T. Pachkowski is gratefully acknowledged; Merck Sharp and Dohme of Canada Limited, Montreal, Canada, is thanked for the supply of Bethanechol chloride (Urecholine).

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Kowalewski, K. Effect of vagotomy and/or antrectomy on gastric secretion stimulated by intravenous infusion of bethanechol chloride. Digest Dis Sci 16, 19–26 (1971). https://doi.org/10.1007/BF02233784

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  • DOI: https://doi.org/10.1007/BF02233784

Keywords

  • Choline
  • Parietal Cell
  • Gastric Secretion
  • Secretory Response
  • Secretory Function