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Homeostasis in the small intestinal mucosa balanced between cell proliferation and apoptosis is regulated partly by the central nervous system

  • Brain-gut relations, basics and clinics, from the viewpoint of neurogastroenterology
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Abstract

The aim of this study was to investigate whether the central nervous system regulates mucosal cell growth and apoptosis in the rat small intestine. Ornithine decarboxylase is a key enzyme for polyamine synthesis, which plays an important role in intestinal mucosal growth. The increase in ornithine decarboxylase activity in the duodenum just before a dark period was abolished by truncal vagotomy. An infusion of 2-deoxy-D-glucose into the third cerebroventricle activated the enzyme activity in the small intestine. Epithelial homeostasis is balanced by the regulation of cell proliferation and cell death. Intestinal mucosal apoptosis decreased in rats with ventromedial hypothalamus lesions, which induced hyperphagia and obesity. In contrast, sustained anorexia induced by 1-deoxy-D-glucosamine increased intestinal apoptosis. These results indicate that the central nervous system, in addition to local factors, is related to the regulation of mucosal homeostasis in the intestinal mucosa.

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Authors and Affiliations

  1. Department of Internal Medicine, Saga Medical School, 5-1-1 Nabeshima, Saga, 849-8501, Japan

    Kazuma Fujimoto, Ryuichi Iwakiri, Bin Wu, Takehiro Fujise, Seiji Tsunada & Akifumi Ootani

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  1. Kazuma Fujimoto
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  2. Ryuichi Iwakiri
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  3. Bin Wu
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  4. Takehiro Fujise
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  5. Seiji Tsunada
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  6. Akifumi Ootani
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Fujimoto, K., Iwakiri, R., Wu, B. et al. Homeostasis in the small intestinal mucosa balanced between cell proliferation and apoptosis is regulated partly by the central nervous system. J Gastroenterol 37 (Suppl 14), 139–144 (2002). https://doi.org/10.1007/BF03326433

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