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Opposite effects of gastrin on cell proliferation in the antrum and other parts of the upper-gastrointestinal tract in the rat

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Abstract

The effect of gastrin on DNA synthesis and mitotic activity in the mucosa of the uppergastrointestinal tract was explored in unanesthetized rats with a gastric fistula. Animals were killed at 4-hr intervals, after starting a 3-hr intravenous infusion with the lowest dose of gastrin provoking a maximal acid output. Tritiated thymidine was injected 1 hr before killing. Autoradiography was used, and labeling and mitotic indices were estimated in the fundic, antral, duodenal, and jejunal mucosa. The proliferative activity in the fundic, duodenal, and jejunal glands was significantly increased 16 hr after the administration of gastrin. In the antral glands, however, a significant decrease in both labeling and mitotic indices was observed. Rhythmic variations in proliferative activity were observed in the antral, duodenal, and jejunal mucosa in control animals. They were different from those in the gastrin-treated animals. Our data confirm the trophic action of gastrin in the fundic, duodenal, and jejunal mucosa. They also indicate an inhibitory effect of this hormone on cell proliferation in the antral mucosa.

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Author notes

  1. M. Dubrasquet (Maitre de Recherches)

    Present address: Institut National de la Santé et de la Recherche Médicale, France

Authors and Affiliations

  1. Navorsingseenheid voor Gastroenterologisch Onderzoek, Vrije Universiteit Brussel, Brussels, Belgium

    P. P. Casteleyn MD, M. Dubrasquet (Maitre de Recherches) & G. Willems MD

  2. Unité de Recherches de Gastroentérologie, INSERM U 10, Hopital Bichat, Paris, France

    P. P. Casteleyn MD, M. Dubrasquet (Maitre de Recherches) & G. Willems MD

Authors
  1. P. P. Casteleyn MD
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  2. M. Dubrasquet
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  3. G. Willems MD
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Additional information

This study was supported in part by grants from the Fonds voor Geneeskundig Wetenschappelijk Onderzoek and the Nationaal Fonds voor Wetenschappelijk Onderzoek, Belgium.

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Casteleyn, P.P., Dubrasquet, M. & Willems, G. Opposite effects of gastrin on cell proliferation in the antrum and other parts of the upper-gastrointestinal tract in the rat. Digest Dis Sci 22, 798–804 (1977). https://doi.org/10.1007/BF01694510

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