Alterations in metabolic pathways in gastric epithelial cells infected with Helicobacter pylori.

Abstract:

:Helicobacter pylori (H. pylori), which is a spiral-shaped Gram-negative microaerobic bacterium, is a causative pathogen. The entry of H. pylori into gastric epithelial cells involves various host signal transduction events, and its virulence factors can also cause a variety of biological responses. In this study, AGS human gastric carcinoma cells were infected with CagA-positive H. pylori strain ATCC43504, and then the metabolites in the AGS cells after the 2-, 6- and 12-h infections were analyzed by GC/MS-based metabolomic analysis. Among 67 metabolites detected, 11 metabolites were significantly altered by the H. pylori infection. The metabolite profiles of H. pylori-infected AGS cells were evaluated on the basis of metabolite pathways, and it was found that glycolysis, tricarboxylic acid (TCA) cycle, and amino acid metabolism displayed characteristic changes in the H. pylori-infected AGS cells. At 2 h post-infection, the levels of many metabolites related to TCA cycle and amino acid metabolism were lower in H. pylori-infected AGS cells than in the corresponding uninfected AGS cells. On the contrary, after 6-h and 12-h infections the levels of most of these metabolites were higher in the H. pylori-infected AGS cells than in the corresponding uninfected AGS cells. In addition, it was shown that the H. pylori infection might regulate the pathways related to isocitrate dehydrogenase and asparagine synthetase. These metabolite alterations in gastric epithelial cells might be involved in H. pylori-induced biological responses; thus, our findings are important for understanding H. pylori-related gastric diseases.

journal_name

Microb Pathog

journal_title

Microbial pathogenesis

authors

Matsunaga S,Nishiumi S,Tagawa R,Yoshida M

doi

10.1016/j.micpath.2018.08.033

subject

Has Abstract

pub_date

2018-11-01 00:00:00

pages

122-129

eissn

0882-4010

issn

1096-1208

pii

S0882-4010(18)30942-2

journal_volume

124

pub_type

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