Mouna Hanachi1, Chaysavanh Manichanh2, Andreu Schoenenberger3, Victoria Pascal3, Florence Levenez4, Nicole Cournède5, Joël Doré6, Jean-Claude Melchior7. 1. Clinical Nutrition Unit, Raymond Poincaré University Hospital (AP-HP), Garches, France; Université de Versailles, Saint-Quentin-en- Yvelines, Montigny-le-Bretonneux, France. Electronic address: mouna.hanachi@aphp.fr. 2. Department of Gastroenterology, Vall d'Hebron Research Institute, Barcelona, Spain. Electronic address: cmanicha@gmail.com. 3. Department of Gastroenterology, Vall d'Hebron Research Institute, Barcelona, Spain. 4. MetaGenoPolis, INRA, Université Paris-Saclay, Jouy-en-Josas, France. 5. Clinical Nutrition Unit, Raymond Poincaré University Hospital (AP-HP), Garches, France. 6. MetaGenoPolis, INRA, Université Paris-Saclay, Jouy-en-Josas, France; MICALIS Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France. 7. Clinical Nutrition Unit, Raymond Poincaré University Hospital (AP-HP), Garches, France; Université de Versailles, Saint-Quentin-en- Yvelines, Montigny-le-Bretonneux, France.
Abstract
BACKGROUND: Functional intestinal disorders (FIDs) are frequently observed in patients with anorexia nervosa (AN). Relationship between FIDs and a potential gut microbiota dysbiosis has been poorly explored. OBJECTIVE: We aimed to determine an association between FIDs severity and dysbiosis of the intestinal microbiota in a severely malnourished patient population with AN undergoing enteral nutrition. DESIGN: Faecal microbiota of AN (DSM IVr criteria) female inpatients were collected and compared to healthy controls based on 16S rRNA profiling. The severity of FIDs was evaluated in patients and healthy controls using Francis Score. RESULTS: Thirty-three patients (BMI: 11,7 ± 1,5; Age: 32 ± 12) and 22 healthy controls (BMI: 21 ± 2; age: 36 ± 12) were included. A marked dysbiosis was identified in AN patients compared to healthy controls (p = 0.03). Some potentially pathogenic bacterial genera (Klebsiella, Salmonella) were more abundant in AN patients whereas, other bacterial symbionts (Eubacterium and Roseburia) involved in immune balance were significantly less abundant in patients than controls. Severity of FIDs was strongly correlated with several microbial genera (r = -0.581 for an unknown genus belonging to Peptostreptococcaceae family; r = 0.392 for Dialister, r = 0.444 for Robinsoniella and r = 0.488 for Enterococcus). Other associations between dysbiosis, clinical and biological characteristics were identified including severity of undernutrition (BMI). CONCLUSION: Observed gut microbiota dysbiosis in malnourished patients with anorexia nervosa is correlated with the severity of FIDs and other metabolic disturbances, which strongly suggests an altered host-microbe symbiosis.
BACKGROUND:Functional intestinal disorders (FIDs) are frequently observed in patients with anorexia nervosa (AN). Relationship between FIDs and a potential gut microbiota dysbiosis has been poorly explored. OBJECTIVE: We aimed to determine an association between FIDs severity and dysbiosis of the intestinal microbiota in a severely malnourished patient population with AN undergoing enteral nutrition. DESIGN: Faecal microbiota of AN (DSM IVr criteria) female inpatients were collected and compared to healthy controls based on 16S rRNA profiling. The severity of FIDs was evaluated in patients and healthy controls using Francis Score. RESULTS: Thirty-three patients (BMI: 11,7 ± 1,5; Age: 32 ± 12) and 22 healthy controls (BMI: 21 ± 2; age: 36 ± 12) were included. A marked dysbiosis was identified in AN patients compared to healthy controls (p = 0.03). Some potentially pathogenic bacterial genera (Klebsiella, Salmonella) were more abundant in AN patients whereas, other bacterial symbionts (Eubacterium and Roseburia) involved in immune balance were significantly less abundant in patients than controls. Severity of FIDs was strongly correlated with several microbial genera (r = -0.581 for an unknown genus belonging to Peptostreptococcaceae family; r = 0.392 for Dialister, r = 0.444 for Robinsoniella and r = 0.488 for Enterococcus). Other associations between dysbiosis, clinical and biological characteristics were identified including severity of undernutrition (BMI). CONCLUSION: Observed gut microbiota dysbiosis in malnourished patients with anorexia nervosa is correlated with the severity of FIDs and other metabolic disturbances, which strongly suggests an altered host-microbe symbiosis.
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