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Intestinal Microbiota and Celiac Disease: Cause, Consequence or Co-Evolution?

Microbial Ecology, Nutrition & Health Research Group, Institute of Agrochemistry and Food Technology, National Research Council (IATA-CSIC), Avda. Agustín Escardino, 7, 46980 Paterna, Valencia, Spain
Department of Pediatrics, Dr. Peset University Hospital, Avda. Gaspar Aguilar, 80, 46017 Valencia, Spain
Department of Pediatrics, Obstetrics and Gynecology, University of Valencia, Av Blasco Ibáñez, 13, 46010 Valencia, Spain
Authors to whom correspondence should be addressed.
Nutrients 2015, 7(8), 6900-6923;
Received: 28 May 2015 / Revised: 3 August 2015 / Accepted: 6 August 2015 / Published: 17 August 2015
(This article belongs to the Special Issue Gluten Related Disorders: People Shall not Live on Bread Alone)
It is widely recognized that the intestinal microbiota plays a role in the initiation and perpetuation of intestinal inflammation in numerous chronic conditions. Most studies report intestinal dysbiosis in celiac disease (CD) patients, untreated and treated with a gluten-free diet (GFD), compared to healthy controls. CD patients with gastrointestinal symptoms are also known to have a different microbiota compared to patients with dermatitis herpetiformis and controls, suggesting that the microbiota is involved in disease manifestation. Furthermore, a dysbiotic microbiota seems to be associated with persistent gastrointestinal symptoms in treated CD patients, suggesting its pathogenic implication in these particular cases. GFD per se influences gut microbiota composition, and thus constitutes an inevitable confounding factor in studies conducted in CD patients. To improve our understanding of whether intestinal dysbiosis is the cause or consequence of disease, prospective studies in healthy infants at family risk of CD are underway. These studies have revealed that the CD host genotype selects for the early colonizers of the infant’s gut, which together with environmental factors (e.g., breast-feeding, antibiotics, etc.) could influence the development of oral tolerance to gluten. Indeed, some CD genes and/or their altered expression play a role in bacterial colonization and sensing. In turn, intestinal dysbiosis could promote an abnormal response to gluten or other environmental CD-promoting factors (e.g., infections) in predisposed individuals. Here, we review the current knowledge of host-microbe interactions and how host genetics/epigenetics and environmental factors shape gut microbiota and may influence disease risk. We also summarize the current knowledge about the potential mechanisms of action of the intestinal microbiota and specific components that affect CD pathogenesis. View Full-Text
Keywords: microbiota; celiac disease; gluten-free diet; dysbiosis microbiota; celiac disease; gluten-free diet; dysbiosis
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Cenit, M.C.; Olivares, M.; Codoñer-Franch, P.; Sanz, Y. Intestinal Microbiota and Celiac Disease: Cause, Consequence or Co-Evolution? Nutrients 2015, 7, 6900-6923.

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