Effects of Fecal Microbiota Transplantation

The intestinal microbiota plays an essential role in digestion and, through the gut-brain axis, in the regulation of weight gain and eating behavior. The balaEating disorders (EDs) are serious pathologies affecting adolescence and young adults, likely to become chronic, with long-term morbidity and mortality impacts. These pathologies represent a very important public health issue. EDs are defined by the DSM-V classification criteria and include different forms: anorexia nervosa, bulimia nervosa, hyperphagia, and atypical or unspecified forms. The global prevalence of these diseases reaches 8.4% in women and 2.2% in men. These eating disorders lead to numerous psychiatric and somatic complications and have a significant impact on the quality of life and mortality of patients (particularly in anorexic patients). The molecular mechanisms underlying eating disorders are still poorly understood. The etiological origin of these diseases is complex and involves various biological, psychological, and sociocultural factors. The intestinal microbiota, which corresponds to the community of microorganisms living inside the intestine, could be one of these factors. Indeed, the microorganisms of the microbiota interact very closely with intestinal cells but also with distant organs, such as the brain, via nerve communications or the bloodstream. nce and dialogue between the intestinal microbiota and human cells can be altered following changes in the environment, diet, or stress. These disturbances, found among others in patients suffering from eating disorders, can lead to a lasting change in the composition or metabolic activity of the microbiota (dysbiosis), which can have profound repercussions on human physiology. Several clinical studies conducted on patients with anorexia have highlighted the existence of intestinal dysbiosis in these individuals. As with anorexia, the potential role of intestinal dysbiosis in bulimic and binge eating patients remains currently unknown. This dysbiosis could have a harmful effect on intestinal physiology and promote the onset of functional digestive disorders, which are frequently found in patients suffering from eating disorders. This dysbiosis could also lead to a disruption of communication along the gut-brain axis and contribute to the eating disorders observed in these patients.