Cited by 406Gut microbiota and healthMicrobial Metabolites in Food BiotechnologyGastrointestinal motility and disorders

Fermentation in the Human Large Intestine: Its Physiologic Consequences and the Potential Contribution of Prebiotics

Macfarlane, George T., Macfarlane, Sandra·2011·Journal of Clinical Gastroenterology

Abstract

The human large intestine harbors a complex microbiota containing many hundreds of different bacterial species. Although structure/function relationships between different components of the microbiota are unclear, this complex multicellular entity plays an important role in maintaining homeostasis in the body. Many of the physiologic properties of the microbiota can be attributed to fermentation and the production of short-chain fatty acids (SCFAs), particularly acetate, propionate, and butyrate. In healthy people, fermentation processes are largely controlled by the amounts and different types of substrate, particularly complex carbohydrates that are accessible to bacteria in the colonic ecosystem. However, other factors impact on bacterial metabolism in the large gut, including large bowel transit time, the availability of inorganic terminal electron acceptors, such as nitrate and sulfate, and gut pH. They all affect the types and levels of SCFA that can be formed by the microbiota. This is important because to a large extent, acetate, propionate, and butyrate have varying physiologic effects in different body tissues. Prebiotics such as galactooligosaccharides together with inulins and their fructooligosaccharide derivatives have been shown to modify the species composition of the colonic microbiota, and in various degrees, to manifest several health-promoting properties related to enhanced mineral absorption, laxation, potential anticancer properties, lipid metabolism, and anti-inflammatory and other immune effects, including atopic disease. Many of these phenomena can be linked to their digestion and SCFA production by bacteria in the large gut.

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Crossref · 10.1097/mcg.0b013e31822fecfe

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Authors
Macfarlane, G. T., & Macfarlane, S.
Affiliations
University of Dundee (GB)
Venue
Journal of Clinical Gastroenterology
Published
2011-11
Volume
45
Pages
S120-S127
ISSN
0192-0790 (ISSN-L)
OpenAlex
W2020187741
Cited by
406
References
98
Citations by year
2026: 22 · 2025: 15 · 2024: 32 · 2023: 26 · 2022: 40 · 2021: 28 · 2020: 27 · 2019: 31 · 2018: 22 · 2017: 36 · 2016: 29 · 2015: 24 · 2014: 25 · 2013: 34 · 2012: 11
FWCI
2.07
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Clinical Gastroenterology (publishedVersion)
  • PubMed (publishedVersion)
  • Discovery Research Portal (University of Dundee) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Nursing › Nutrition and Dietetics › Microbial Metabolites in Food Biotechnology
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
Keywords
colonic fermentation, gut microbiota, short-chain fatty acids, butyrate, acetate, propionate, colonic transit time, gut pH, prebiotics, galactooligosaccharides, fructooligosaccharides, inulin, mineral absorption, laxation, anticancer effects, lipid metabolism, anti-inflammatory activity, atopic diseases
MeSH terms
Fatty Acids, Volatile, Fermentation, Humans, Intestine, Large, Carbohydrate Metabolism, Metagenome, Prebiotics

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