microorganisms Article Fecal Microbiota Transplant from Human to Mice Gives Insights into the Role of the Gut Microbiota in Non-Alcoholic Fatty Liver Disease (NAFLD) Sebastian D. Burz 1,2 , Magali Monnoye 1, Catherine Philippe 1, William Farin 3 , Vlad Ratziu 4, Francesco Strozzi 3, Jean-Michel Paillarse 3, Laurent Chêne 3, Hervé M. Blottière 1,2 and Philippe Gérard 1,* 1 Micalis Institute, Université Paris-Saclay, INRAE, AgroParisTech, 78350 Jouy-en-Josas, France;
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[email protected]; Tel.: +33-134652428 Abstract: Non-alcoholic fatty liver diseases (NAFLD) are associated with changes in the composition and metabolic activities of the gut microbiota. However, the causal role played by the gut microbiota in individual susceptibility to NAFLD and particularly at its early stage is still unclear. In this context, we transplanted the microbiota from a patient with fatty liver (NAFL) and from a healthy individual to two groups of mice. We first showed that the microbiota composition in recipient mice Citation: Burz, S.D.; Monnoye, M.; resembled the microbiota composition of their respective human donor. Following administration Philippe, C.; Farin, W.; Ratziu, V.; Strozzi, F.; Paillarse, J.-M.; Chêne, L.; of a high-fructose, high-fat diet, mice that received the human NAFL microbiota (NAFLR) gained Blottière, H.M.; Gérard, P.