TY - JOUR
T1 - Proton pump inhibitors induce changes in colonocyte gene expression that may affect Clostridium difficile infection
AU - Hegarty, John P.
AU - Sangster, William
AU - Harris, Leonard R.
AU - Stewart, David B.
N1 - Publisher Copyright:
© 2014 Elsevier Inc. All rights reserved.
PY - 2014/10/1
Y1 - 2014/10/1
N2 - 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 <.05 (false discovery) were identified as being differentially expressed. 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.
AB - 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 <.05 (false discovery) were identified as being differentially expressed. 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.
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U2 - 10.1016/j.surg.2014.06.074
DO - 10.1016/j.surg.2014.06.074
M3 - Article
C2 - 25151556
AN - SCOPUS:84909619356
SN - 0039-6060
VL - 156
SP - 972
EP - 978
JO - Surgery (United States)
JF - Surgery (United States)
IS - 4
M1 - 3860
ER -