José Antonio García-Salcedo1,2, Inmaculada López-Aliaga3, Ana Soriano-Lerma3,4, María García-Burgos3, María J M Alférez3, Virginia Pérez-Carrasco4,5, Victoria Sanchez-Martin4,5, Ángel Linde-Rodríguez4,5, Matilde Ortiz-González6, Miguel Soriano7. 1. GENYO. Centre for Genomics and Oncological Research, Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, 18016, Granada, Spain. jags@genyo.es. 2. Microbiology Unit, Biosanitary Research Institute Ibs. GRANADA, University Hospital Virgen de las Nieves, 18014, Granada, Spain. jags@genyo.es. 3. Department of Physiology (Faculty of Pharmacy, Cartuja University Campus), Institute of Nutrition and Food Technology "José Mataix", University of Granada, 18071, Granada, Spain. 4. GENYO. Centre for Genomics and Oncological Research, Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, 18016, Granada, Spain. 5. Microbiology Unit, Biosanitary Research Institute Ibs. GRANADA, University Hospital Virgen de las Nieves, 18014, Granada, Spain. 6. Center for Intensive Mediterranean Agrosystems and Agri-Food Biotechnology (CIAIMBITAL), University of Almeria, 04001, Almería, Spain. 7. Center for Intensive Mediterranean Agrosystems and Agri-Food Biotechnology (CIAIMBITAL), University of Almeria, 04001, Almería, Spain. msoriano@ual.es.
Abstract
PURPOSE: Anaemia is a global health concern, with iron deficiency anaemia (IDA) causing approximately 50% of cases. Affecting mostly the elderly, pregnant and adult women and children, physiopathology of IDA in relation to the gut microbiome is poorly understood. Therefore, the objective of this study is to analyse, in an animal model, the effect of IDA on the gut microbiome along the gastrointestinal tract, as well as to relate intestinal dysbiosis to changes in microbial metabolites such as short chain fatty acids (SCFA). METHODS: IDA was experimentally induced through an iron deficient diet for a period of 40 days, with twenty weaned male Wistar rats being randomly divided into control or anaemic groups. Blood samples were collected to control haematological parameters, and so were faecal and intestinal content samples to study gut microbial communities and SCFA, using 16S rRNA sequencing and HPLC-UV respectively. RESULTS: An intestinal dysbiosis was observed as a consequence of IDA, especially towards the distal segments of the gastrointestinal tract and the colon. An increase in SCFA was also noticed during IDA, with the major difference appearing in the colon and correlating with changes in the composition of the gut microbiome. Clostridium_sensu_stricto_1 and Clostridium_sensu_stricto_4 showed the greatest correlation with variations in butyric and propionic concentrations in the colon of anaemic animals. CONCLUSIONS: Composition of intestinal microbial communities was affected by the generation of IDA. An enrichment in certain SCFA-producing genera and SCFA concentrations was found in the colon of anaemic animals, suggesting a trade-off mechanism against disease.
PURPOSE: Anaemia is a global health concern, with iron deficiency anaemia (IDA) causing approximately 50% of cases. Affecting mostly the elderly, pregnant and adult women and children, physiopathology of IDA in relation to the gut microbiome is poorly understood. Therefore, the objective of this study is to analyse, in an animal model, the effect of IDA on the gut microbiome along the gastrointestinal tract, as well as to relate intestinal dysbiosis to changes in microbial metabolites such as short chain fatty acids (SCFA). METHODS: IDA was experimentally induced through an iron deficient diet for a period of 40 days, with twenty weaned male Wistar rats being randomly divided into control or anaemic groups. Blood samples were collected to control haematological parameters, and so were faecal and intestinal content samples to study gut microbial communities and SCFA, using 16S rRNA sequencing and HPLC-UV respectively. RESULTS: An intestinal dysbiosis was observed as a consequence of IDA, especially towards the distal segments of the gastrointestinal tract and the colon. An increase in SCFA was also noticed during IDA, with the major difference appearing in the colon and correlating with changes in the composition of the gut microbiome. Clostridium_sensu_stricto_1 and Clostridium_sensu_stricto_4 showed the greatest correlation with variations in butyric and propionic concentrations in the colon of anaemic animals. CONCLUSIONS: Composition of intestinal microbial communities was affected by the generation of IDA. An enrichment in certain SCFA-producing genera and SCFA concentrations was found in the colon of anaemic animals, suggesting a trade-off mechanism against disease.
Authors: Nupur K Das; Andrew J Schwartz; Gabrielle Barthel; Naohiro Inohara; Qing Liu; Amanda Sankar; David R Hill; Xiaoya Ma; Olivia Lamberg; Matthew K Schnizlein; Juan L Arqués; Jason R Spence; Gabriel Nunez; Andrew D Patterson; Duxin Sun; Vincent B Young; Yatrik M Shah Journal: Cell Metab Date: 2019-11-07 Impact factor: 27.287