Cited by 3,001Gut microbiota and healthInfant Nutrition and HealthOral microbiology and periodontitis research

Role of the normal gut microbiota

Open access
Jandhyala, Sai Manasa·2015·World Journal of Gastroenterology

Abstract

Relation between the gut microbiota and human health is being increasingly recognised. It is now well established that a healthy gut flora is largely responsible for overall health of the host. The normal human gut microbiota comprises of two major phyla, namely Bacteroidetes and Firmicutes. Though the gut microbiota in an infant appears haphazard, it starts resembling the adult flora by the age of 3 years. Nevertheless, there exist temporal and spatial variations in the microbial distribution from esophagus to the rectum all along the individual's life span. Developments in genome sequencing technologies and bioinformatics have now enabled scientists to study these microorganisms and their function and microbe-host interactions in an elaborate manner both in health and disease. The normal gut microbiota imparts specific function in host nutrient metabolism, xenobiotic and drug metabolism, maintenance of structural integrity of the gut mucosal barrier, immunomodulation, and protection against pathogens. Several factors play a role in shaping the normal gut microbiota. They include (1) the mode of delivery (vaginal or caesarean); (2) diet during infancy (breast milk or formula feeds) and adulthood (vegan based or meat based); and (3) use of antibiotics or antibiotic like molecules that are derived from the environment or the gut commensal community. A major concern of antibiotic use is the long-term alteration of the normal healthy gut microbiota and horizontal transfer of resistance genes that could result in reservoir of organisms with a multidrug resistant gene pool.

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  • The host-microbiota relationship has been defined as the synergistic effect of microbial metabolites on host immunity, health and disease, energy metabolism, and cellular communication.

    “The host-microbiota relationship has been defined as the synergistic effect of microbial metabolites on host immunity, health and disease, energy metabolism, and cellular communication.59, 60, 61, 62, 63,64”
  • The gut microbiota has a key role in metabolic, nutritional, physiological, defensive and immunological processes in the human body.

    “The gut microbiota has a key role in metabolic, nutritional, physiological, defensive and immunological processes in the human body, and its composition is closely connected to individuals’ health and the diseases they experience[12,13].”

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  1. Bourriaud C, Akoka S, Goupry S, Robins R, Cherbut C, Michel C. Butyrate production from lactate by human colonic microflora. Reprod Nutr Dev 2002; 42: S55

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Authors
Jandhyala, S. M.
Venue
World Journal of Gastroenterology
Published
2015
Volume
21
Issue
29
Pages
8787
ISSN
1007-9327 (ISSN-L)
OpenAlex
W1420654867
Cited by
3,001
References
163
Citations by year
2026: 170 · 2025: 382 · 2024: 491 · 2023: 439 · 2022: 391 · 2021: 366 · 2020: 266 · 2019: 205 · 2018: 142 · 2017: 102 · 2016: 36 · 2015: 4 · 2014: 1
FWCI
9.18
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • World Journal of Gastroenterology (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Nursing › Nutrition and Dietetics › Infant Nutrition and Health
  • Health Sciences › Dentistry › Periodontics › Oral microbiology and periodontitis research
Keywords
gut microbiota, Bacteroidetes, Firmicutes, infant gut colonization, nutrient metabolism, gut mucosal barrier, immunomodulation, pathogen protection, mode of delivery, breast milk, infant formula, diet, antibiotic use, antibiotic resistance genes, horizontal gene transfer, multidrug resistance
MeSH terms
Bacillota, Gastrointestinal Microbiome, Age Factors, Anti-Bacterial Agents, Bacteriological Techniques, Diet, Health Status, Homeostasis, Humans, Intestines, Computational Biology, Probiotics, Bacteroidetes, Host-Pathogen Interactions, Prebiotics, Synbiotics

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