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Calvigioni, Marco; Panattoni, Adelaide; Biagini, Francesco; Donati, Leonardo; Mazzantini, Diletta; Massimino, Mariacristina; Daddi, Costanza; Celandroni, Francesco; Vozzi, Giovanni; Ghelardi, Emilia
Microbiology spectrum, 08/2023, Volume: 11, Issue: 4Journal Article
Culturing the gut microbiota in models that mimic the intestinal environment is increasingly becoming a promising alternative approach to study microbial dynamics and the effect of perturbations on the gut community. Since the mucus-associated microbial populations in the human intestine differ in composition and functions from their luminal counterpart, we attempted to reproduce the microbial consortia adhering to mucus using an already established three-dimensional model of the human gut microbiota. Electrospun gelatin structures supplemented or not with mucins were inoculated with fecal samples and compared for their ability to support microbial adhesion and growth over time, as well as to shape the composition of the colonizing communities. Both scaffolds allowed the establishment of long-term stable biofilms with comparable total bacterial loads and biodiversity. However, mucin-coated structures harbored microbial consortia especially enriched in , , and , being therefore able to select for microorganisms commonly considered mucosa-associated . These findings highlight the importance of mucins in shaping intestinal microbial communities, even those in artificial gut microbiota systems. We propose our model based on mucin-coated electrospun gelatin structures as a valid device for studies evaluating the effects of exogenous factors (nutrients, probiotics, infectious agents, and drugs) on mucus-adhering microbial communities.
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