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Adeline S, Mélissa C, Caroline C, Elia R, Elisabeth B, Jérémy D, Nicolas B. Vill-hCEACAM6, a novel AIEC-colonized mouse model to evaluate microbiota-targeting strategies in Crohn's disease. Dis Model Mech 2022; 15:276940. [PMID: 36172858 PMCID: PMC9637268 DOI: 10.1242/dmm.049707] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 09/20/2022] [Indexed: 12/02/2022] Open
Abstract
Adherent-invasive Escherichia coli (AIEC) were investigated for their involvement in the induction/chronicity of intestinal inflammation in Crohn's disease (CD). AIEC gut establishment is favoured by overexpression of the glycoprotein CEACAM6 in the ileal epithelium. We generated a transgenic mouse model, named ‘Vill-hCC6’, in which the human CEACAM6 gene was under the control of the villin promoter, conditioning expression in the small intestine. We demonstrated that CEACAM6 is strongly expressed in the small intestine mucosa and is correlated with numerous glycosylations displayed at the brush border of enterocytes. Ex vivo, the AIEC–enterocyte interaction was enhanced by CEACAM6 expression and necessitated the presence of the bacterial adhesive factor FimH. Finally, AIEC bacteria preferentially persisted in a FimH-dependent manner in the ileal mucosa of Vill-hCC6 mice compared to wild-type mice. This preclinical model opens new perspectives in the mechanistic study of the AIEC pathobiont and represents a valuable tool to evaluate the efficacy of new strategies to eliminate AIEC implanted in the ileal mucosa, such as phages, inhibitory and/or anti-virulence molecules, or CRISPR-based strategies targeting virulence or fitness factors of AIEC bacteria.
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Affiliation(s)
- Sivignon Adeline
- Université Clermont Auvergne, Inserm U1071, INRAe USC 2018, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, 63001, France.,Institut Universitaire de Technologie, Génie Biologique, Aubière 63172, France
| | - Chervy Mélissa
- Université Clermont Auvergne, Inserm U1071, INRAe USC 2018, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, 63001, France
| | - Chevarin Caroline
- Université Clermont Auvergne, Inserm U1071, INRAe USC 2018, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, 63001, France
| | - Ragot Elia
- Université Clermont Auvergne, Inserm U1071, INRAe USC 2018, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, 63001, France
| | - Billard Elisabeth
- Université Clermont Auvergne, Inserm U1071, INRAe USC 2018, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, 63001, France.,Institut Universitaire de Technologie, Génie Biologique, Aubière 63172, France
| | - Denizot Jérémy
- Université Clermont Auvergne, Inserm U1071, INRAe USC 2018, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, 63001, France.,Institut Universitaire de Technologie, Génie Biologique, Aubière 63172, France
| | - Barnich Nicolas
- Université Clermont Auvergne, Inserm U1071, INRAe USC 2018, Microbes, Intestin, Inflammation et Susceptibilité de l'Hôte (M2iSH), Clermont-Ferrand, 63001, France.,Institut Universitaire de Technologie, Génie Biologique, Aubière 63172, France
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