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Updated: May 17, 2026
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Human Colonoid Monolayers to Study Interactions Between Pathogens, Commensals, and Host Intestinal Epithelium
Published on: April 9, 2019
Primocolonization is associated with colonic epithelial maturation during conventionalization.
Julie Tomas1, Laura Wrzosek, Nassim Bouznad
1Commensal and Probiotics-Host Interactions Laboratory, Institut National de Recherche Agronomique, Jouy-en-Josas, France.
Summary
Early gut microbiota exposure influences infant gut development. Both early and adult microbial communities promote colon maturation, with adult microbiota driving more pronounced functional development in the colon.
Area of Science:
- Microbiology
- Gastroenterology
- Developmental Biology
Background:
- Gut microbiota colonization begins at birth, influencing host intestinal development.
- The composition of early-life gut microbiota plays a critical role in shaping the host's intestinal environment.
Purpose of the Study:
- To investigate colonic epithelial interactions following initial gut microbiota exposure.
- To compare the effects of suckling versus adult rat-derived microbiota on germ-free rat colons.
Main Methods:
- Germ-free rats were inoculated with either suckling or adult rat microbiota.
- Colonic epithelial responses, including proliferation, cell cycle regulators (p21Cip1, p27Kip1), goblet cell numbers, and transporter expression (solute carriers, aquaporins), were analyzed.
Main Results:
- Both microbiota types induced a transient proliferative phase followed by a compensatory phase in the colonic epithelium.
- Common epithelial responses included increased p21Cip1, p27Kip1, and goblet cell numbers.
- Exposure to adult microbiota led to more pronounced functional maturation of colonic transporters compared to suckling microbiota.
Conclusions:
- The colon matures in parallel with microbial community evolution.
- A link is suggested between intestinal homeostasis regulation and microbial composition modulation.
- Early gut microbiota exposure significantly impacts colonic epithelial development and function.
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