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Abstract Title:

A comparison of the gut microbiome between long-term users and non-users of proton pump inhibitors.

Abstract Source:

Aliment Pharmacol Ther. 2016 Feb 29. Epub 2016 Feb 29. PMID: 26923470

Abstract Author(s):

A G Clooney, C N Bernstein, W D Leslie, K Vagianos, M Sargent, E J Laserna-Mendieta, M J Claesson, L E Targownik

Article Affiliation:

A G Clooney

Abstract:

BACKGROUND: Proton pump inhibitor (PPI) use is associated with an increased risk of Clostridium difficile infection (CDI), though the mechanism is unclear. PPI induced alterations to the gut microbiome may facilitate the emergence of CDI, though the effects of PPIs on gut microflora are not well characterised.

AIM: To compare the faecal microbiomes of long-term PPI users to those with no history of PPI use.

METHODS: We used a population-based database to identify individuals with≥5 years of continuous PPI use along with non-PPI using controls. Stool samples were subjected to microbiological analysis, with hierarchical clustering at genus level, along with alpha and beta diversity measures comparing the two groups. Metadata was accounted for using quantile regression to eliminate potential confounding variables in taxonomic abundance comparisons.

RESULTS: Sixty-one subjects (32 PPI, 29 controls) were analysed. While no significant differences in alpha diversity were found between the PPI users and controls, a moderate shift of the PPI users away from the non-PPI user cluster in the beta diversity was observed. After controlling for pertinent confounders, we discovered a decrease in Bacteroidetes and an increase in Firmicutes at the phylum level. We also performed species classifications and found Holdemania filiformis and Pseudoflavonifractor capillosus to be increased and decreased in the PPI cohort, respectively.

CONCLUSIONS: Long-term PPIs use has an effect on the gut microbiome. The decrease in the ratio of Firmicutes to Bacteroidetes may pre-dispose to the development of CDI.

Study Type : Human Study

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Sayer Ji
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