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• W4313489056 abstract "Faecalibacterium represents one of the most abundant bacterial groups in the human intestinal microbiota of healthy adults and can represent more than 10% of the total bacterial population, Faecalibacterium prausnitzii being the only recognized species up to the past year. Reduction in the abundance of F. prausnitzii in the human gut has been linked to several human disorders, such as Crohn's disease. In this study, we developed a strategy to modify the relative abundance of F. prausnitzii in fecal microbiotas as a means of evaluating its contribution to the immunomodulatory effect of intestinal microbiotas with different F. prausnitzii contents using a peripheral blood mononuclear cell (PBMC) model. We used a polyclonal antibody against the surface of F. prausnitzii M21 to capture the bacterium from synthetic and human fecal microbiotas using immunoseparation techniques. As a proof-of-principle study, the levels of immunomodulation exerted by microbiotas of healthy donors (HDs) with different relative abundances of F. prausnitzii, achieved with the above-mentioned immunoseparation technique, were evaluated in a PBMC model. For this purpose, PBMCs were cocultivated with the modified microbiotas or a pure culture of F. prausnitzii and, subsequently, the microbiota of Crohn's donors was added to the coculture. The cytokine concentration was determined, showing that our experimental model supports the anti-inflammatory effects of this bacterium. IMPORTANCE There is increasing interest in deciphering the contribution of gut microbiota species to health and disease amelioration. The approach proposed herein provides a novel and affordable strategy to probe deeply into microbiota-host interactions by strategically modifying the relative abundance of specific gut microbes, hence facilitating the study of their contribution to a given trait of the microbiota." @default.
• W4313489056 created "2023-01-06" @default.
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• W4313489056 date "2023-02-14" @default.
• W4313489056 modified "2023-10-16" @default.
• W4313489056 title "Immunomagnetic Capture of Faecalibacterium prausnitzii Selectively Modifies the Fecal Microbiota and Its Immunomodulatory Profile" @default.
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• W4313489056 doi "https://doi.org/10.1128/spectrum.01817-22" @default.
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