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Bacterial Flora of the Large Intestine01:29

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The gut microbiome is formed by a vast and diverse community of bacteria that colonizes our large intestine. These bacteria start residing in the gut from birth and continue diversifying throughout life, influenced by factors such as diet, lifestyle, and stress. The gut bacterial community also includes bacteria from food and those that enter the colon through the anus.
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The small intestine exhibits a unique histological structure that significantly enhances its function in digestion and nutrient absorption. These structures include circular folds, villi, and various specialized cells that collectively facilitate the digestion of food.
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Related Experiment Video

Updated: Jun 15, 2025

Therapeutic Evaluation of Fecal Microbiota Transplantation in an Interleukin 10-Deficient Mouse Model
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Gut microbiome structure and function in asymptomatic diverticulosis.

Xinwei Hua1,2,3, Jessica McGoldrick2,3, Nour Nakrour4

  • 1Department of Cardiology, State Key Laboratory of Vascular Homeostasis and Remodeling, and Institute of Vascular Medicine, Peking University Third Hospital, Beijing, China.

Genome Medicine
|August 23, 2024
PubMed
Summary

Gut microbiome alterations are linked to asymptomatic colonic diverticulosis. Specific bacterial species like Roseburia intestinalis were more abundant in individuals with diverticulosis, suggesting a role for gut dysbiosis.

Keywords:
Asymptomatic diverticulosisGut microbiomeMetagenomic sequencing

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Applying Advanced In Vitro Culturing Technology to Study the Human Gut Microbiota
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Area of Science:

  • Gastroenterology
  • Microbiome Research
  • Computational Biology

Background:

  • Colonic diverticulosis affects over 50% of individuals aged 60 years and older.
  • Gut microbiota dysbiosis is increasingly implicated in diverticular disease.
  • Specific microbial changes in asymptomatic diverticulosis are not well understood.

Purpose of the Study:

  • To investigate the gut microbiome composition in individuals with asymptomatic colonic diverticulosis.
  • To identify specific microbial species and metabolic pathways associated with diverticulosis.
  • To explore potential interactions between the gut microbiome, body mass index (BMI), and diverticulosis.

Main Methods:

  • Shotgun metagenomic sequencing was used to analyze the gut microbiota in US adults undergoing screening colonoscopy.
  • Taxonomic structures and metabolic pathway abundances were determined using MetaPhlAn3 and HUMAnN3.
  • Multivariate association with linear models adjusted for age, sex, BMI, and dietary pattern to identify significant differences.

Main Results:

  • Among 684 participants, 284 (42%) had diverticulosis. Gut microbiome composition explained 1.9% of the variation in disease status.
  • No significant differences in overall gut microbiome diversity were observed.
  • Roseburia intestinalis, Dorea sp. CAG:317, and Clostridium sp. CAG:299 were more abundant in diverticulosis cases, while Bifidobacterium pseudocatenulatum and Prevotella copri were enriched in controls.

Conclusions:

  • This study presents large-scale evidence for taxonomic and functional shifts in the gut microbiome of individuals with asymptomatic diverticulosis.
  • Specific gut bacteria are associated with the presence of asymptomatic diverticulosis.
  • Further research is warranted to investigate the interaction between gut microbiota and BMI in diverticulosis.