The duodenal microbiota composition in children with active coeliac disease is influenced by the degree of enteropathy

Abstract

Objectives: To establish whether the duodenal mucosa microbiota of children with active coeliac disease (CD) and healthy controls (HC) differ in composition and biodiversity.Material and methods: Samples of duodenal biopsies in 11 CD patients were obtained at diagnosis, and in 6 HC who were investigated for functional intestinal disorders of non-CD origin. Total duodenal microbiota and the belonging to the genus Lactobacillus using PCR-denaturing gradient gel electrophoresis (DGGE) were analysed. The banding patterns obtained in the resulting gels were analysed to determine the differences between the microbiota of CD patients and HC (FPQuest 4.5) while environmental indexes (richness, diversity and habitability) were calculated with the Past version 2.17 program.Results: The intestinal microbiota of patients with Marsh 3c lesion showed similarity of 98% and differs from other CD patients with other type of histologic lesion as Marsh 3a, Marsh 3b and Marsh 2. The main differences were obtained in ecological indexes belonging to the genus Lactobacillus, with significant richness, diversity and habitability reduction in CD patients. In CD bands were categorized primarily with Streptococcus, Bacteroides and E. coli species. In HC the predominant bands were Bifidobacterium, Lactobacillus and Acinetobacter, though the Streptococcus and Bacteroides were lower.Conclusions: The celiac patients with major histological affectation presented a similar micro biota duodenal. The ecological indexes applied to the genus Lactobacillus were significantly reduced in CD. (C) 2015 Asociacion Espanola de Pediatria. Published by Elsevier Espana, S.L.U. All rights reserved.