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Updated: Jul 18, 2025
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An In Vitro Batch-culture Model to Estimate the Effects of Interventional Regimens on Human Fecal Microbiota
Published on: July 31, 2019
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Individual and Group-Based Effects of In Vitro Fiber Interventions on the Fecal Microbiota
Valeria Agamennone1, Tim J van den Broek1, Alie de Kat Angelino-Bart1
1Microbiology and Systems Biology Group, TNO, 2333 BE Leiden, The Netherlands.
Microorganisms
|August 26, 2023
Summary
Individual gut microbiome responses to dietary fibers vary significantly. An in vitro model demonstrated distinct effects of fibers on gut bacteria composition and metabolites, highlighting its utility for personalized microbiome research.
Area of Science:
- Microbiology
- Gastroenterology
- Nutritional Science
Background:
- Personalized microbiome-targeted strategies are hindered by inter-individual variability in gut microbiota composition and metabolic responses.
- In vitro models offer a controlled environment to study these variations and conduct pre-clinical assessments.
Purpose of the Study:
- To investigate the impact of different dietary fibers on individual fecal microbiota composition and metabolic profiles using an in vitro system.
- To compare the effects of fibers between individuals with good intestinal health and those with Inflammatory Bowel Disease (IBD).
Main Methods:
- Anaerobic cultivation of 16 individual fecal microbiota samples exposed to 5 different dietary fibers.
- Analysis of microbiota composition and metabolite profiles (short-chain fatty acids, branched-chain fatty acids).
- Assessment of alpha-diversity and functional metabolic profiles.
Main Results:
- Significant differences in microbiota composition and metabolite profiles were observed among individuals after fiber incubation.
- Microbiota composition varied significantly between healthy subjects and IBD patients post-fiber exposure.
- Dietary fibers differentially affected alpha-diversity, with psyllium increasing diversity in healthy individuals but decreasing it in IBD patients.
- Functional metabolic profiles did not significantly differ between the groups.
- A combination of all tested fibers showed stronger effects on microbiota composition and metabolite production in IBD subjects compared to single fibers.
Conclusions:
- Dietary fiber incubation elicits distinct compositional and functional effects on individual gut microbiota.
- In vitro models are effective tools for studying personalized fiber effects and understanding gut microbiome variations.
- Findings suggest potential for tailored fiber interventions based on individual microbiome characteristics, particularly for IBD management.
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