Short-chain fatty acids regulate the enteric neurons and control gastrointestinal motility in rats - PubMed (original) (raw)
. 2010 May;138(5):1772-82.
doi: 10.1053/j.gastro.2010.01.053. Epub 2010 Feb 10.
Affiliations
- PMID: 20152836
- DOI: 10.1053/j.gastro.2010.01.053
Short-chain fatty acids regulate the enteric neurons and control gastrointestinal motility in rats
Rodolphe Soret et al. Gastroenterology. 2010 May.
Abstract
Background & aims: Little is known about the environmental and nutritional regulation of the enteric nervous system (ENS), which controls gastrointestinal motility. Short-chain fatty acids (SCFAs) such as butyrate regulate colonic mucosa homeostasis and can modulate neuronal excitability. We investigated their effects on the ENS and colonic motility.
Methods: Effects of butyrate on the ENS were studied in colons of rats given a resistant starch diet (RSD) or intracecal perfusion of SCFAs. Effects of butyrate were also studied in primary cultures of ENS. The neurochemical phenotype of the ENS was analyzed with antibodies against Hu, choline acetyltransferase (ChAT), and neuronal nitric oxide synthase (nNOS) and by quantitative polymerase chain reaction. Signaling pathways involved were analyzed by pharmacologic and molecular biology methods. Colonic motility was assessed in vivo and ex vivo.
Results: In vivo and in vitro, RSD and butyrate significantly increased the proportion of ChAT- but not nNOS-immunoreactive myenteric neurons. Acetate and propionate did not reproduce the effects of butyrate. Enteric neurons expressed monocarboxylate transporter 2 (MCT2). Small interfering RNAs silenced MCT2 and prevented the increase in the proportion of ChAT- immunoreactive neurons induced by butyrate. Butyrate and trichostatin A increased histone H3 acetylation in enteric neurons. Effects of butyrate were prevented by inhibitors of the Src signaling pathway. RSD increased colonic transit, and butyrate increased the cholinergic-mediated colonic circular muscle contractile response ex vivo.
Conclusion: Butyrate or histone deacetylase inhibitors might be used, along with nutritional approaches, to treat various gastrointestinal motility disorders associated with inhibition of colonic transit.
Copyright 2010 AGA Institute. Published by Elsevier Inc. All rights reserved.
Comment in
- Targeting enteric neuroplasticity: diet and bugs as new key factors.
de Giorgio R, Blandizzi C. de Giorgio R, et al. Gastroenterology. 2010 May;138(5):1663-6. doi: 10.1053/j.gastro.2010.03.022. Epub 2010 Mar 21. Gastroenterology. 2010. PMID: 20332039 No abstract available.
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