| Microbial equol production attenuates colonic methanogenesis and sulphidogenesis in vitro. | |
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MedLine Citation:
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PMID: 20298796 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Hydrogen gas produced during colonic fermentation is excreted in breath and flatus, or removed by hydrogen-consuming bacteria such as methanogens and sulphate-reducing bacteria. However, recent research has shown that H2 is also consumed by equol-producing bacteria during the reduction of daidzein into equol. In this study, the interactions between methanogens, sulphate-reducing, and equol-producing bacteria were investigated under in vitro simulated intestinal conditions. In the presence of daidzein, the equol-producing bacterial consortium EPC4 gave rise to equol production in cultures of Methanobrevibacter smithii or Desulfovibrio sp. as well as in faecal samples with methanogenic or sulphate-reducing abilities. Moreover, this supplementation significantly (P<0.001) decreased the methanogenesis and sulphidogenesis. The attenuation did not occur in the absence of a daidzein source. Additionally, there was no influence of soy germ powder, daidzein or equol as such, excluding a possible inhibition by these compounds. Finally, a stronger decrease was observed with increasing amounts of EPC4 and a constant equol production, suggesting that the observed effect was only partly caused by the action of daidzein as a hydrogen sink. These findings are of relevance since abdominal discomfort such as bloating and flatulence, are related to colonic gas production, whereas equol has potential health benefits. |
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Authors:
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Selin Bolca; Willy Verstraete |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-03-16 |
Journal Detail:
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Title: Anaerobe Volume: 16 ISSN: 1095-8274 ISO Abbreviation: Anaerobe Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-05-31 Completed Date: 2010-09-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9505216 Medline TA: Anaerobe Country: England |
Other Details:
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Languages: eng Pagination: 247-52 Citation Subset: IM |
Copyright Information:
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2010 Elsevier Ltd. All rights reserved. |
Affiliation:
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Laboratory of Microbial Ecology and Technology (LabMET), Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium. selin.bolca@ugent.be |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Colon
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metabolism*,
microbiology* Culture Media Desulfovibrio / metabolism Enterococcus faecium / growth & development, metabolism Euryarchaeota / growth & development, metabolism Feces / microbiology Female Humans Hydrogen / metabolism Isoflavones / biosynthesis*, metabolism Lactobacillus / growth & development, metabolism* Methane / metabolism* Methanobrevibacter / growth & development, metabolism Middle Aged Sulfides / metabolism* Veillonella / growth & development, metabolism |
| Chemical | |
Reg. No./Substance:
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0/Culture Media; 0/Isoflavones; 0/Sulfides; 1333-74-0/Hydrogen; 486-66-8/daidzein; 531-95-3/equol; 74-82-8/Methane |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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