Proton pump inhibitors induce changes in colonocyte gene expression that may affect Clostridium difficile infection.

Publication/Presentation Date

10-1-2014

Abstract

BACKGROUND: Proton pump inhibitors seem to promote Clostridium difficile infection (CDI). Although the current literature suggests that this association is mediated through gastric acid suppression, there has been little investigation into whether a direct effect on expression of colonocyte genes may also have a role. The aim of this study was to investigate the effect of omeprazole on genome-wide gene expression in a human colonic cell line.

METHODS: T84 cell monolayers were treated with acid-activated omeprazole at 0, 1, 10, or 100 μmol/L for 48 hours. Cells were lysed and total RNA samples were reverse transcribed and used to generate biotinylated cRNA. Whole-genome transcript expression levels were then quantified using an Illumina HT-12 BeadChip microarray targeting 25,440 genes. Transcripts with a stringent minimum absolute fold change of 1.5 and an adjusted nominal P value

RESULTS: Significant changes in expression were observed for 322 colonocyte transcripts, including genes with potential implications for susceptibility to CDI. These genes include roles in cell junctions, toxin susceptibility, and bile acid metabolism and transport.

CONCLUSION: Omeprazole treatment decreases the expression of genes that have important functions in colonocyte integrity. Such impairment in colonocyte function may promote CDI.

Volume

156

Issue

4

First Page

972

Last Page

978

ISSN

1532-7361

Disciplines

Medicine and Health Sciences

PubMedID

25151556

Department(s)

Department of Surgery

Document Type

Article

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