Role of Treg and TH17 cells of the gastric mucosa in children with Helicobacter pylori gastritis.

Abstract:

OBJECTIVE:The aim of the present study was to examine the expression of FOXP3, interleukin (IL)-10, transforming growth factor (TGF)-β1, IL-17A, and T helper 17 (TH17) cells/FOXP3+ regulatory T (Treg) cells balance in the gastric mucosa of children with Helicobacter pylori infection, in relation to the gastric histopathology. METHODS:Antral mucosal biopsies were obtained from 20 children with H pylori(+) gastritis and 20 age- and sex-matched normal controls. Histopathology was assessed by the updated Sydney classification. Gene expression of FOXP3, IL-10, and TGF-β1 was analyzed by quantitative real-time polymerase chain reaction. Immunohistochemical staining for FOXP3+ Treg and TH17 cells was performed. RESULTS:The gene expression levels of FOXP3, TGF-β1, and IL-10 messenger RNA (mRNA) and the number of FOXP3+ Treg were significantly higher in the H pylori(+) gastritis group than in the control group (P < 0.01). FOXP3 mRNA levels were correlated positively with TGF-β1 and IL-10 mRNA levels in the H pylori(+) gastritis group (P < 0.05). Furthermore, FOXP3 mRNA levels were correlated positively with the bacterial density, infiltration of polymorphonuclear cells, and mononuclear cells in the H pylori(+) gastritis group (P < 0.05). The number of TH17 cells was significantly higher in the H pylori(+) gastritis group than in the control group (P < 0.05). In addition, the number of TH17 cells was correlated negatively with the bacterial density and positively with the inflammatory scores of polymorphonuclear cells and mononuclear cells in the H pylori(+) gastritis group (P < 0.05). A negative correlation between the TH17 cells/FOXP3+ Treg ratio and the bacterial density was demonstrated in the H pylori(+) gastritis group (P < 0.05). CONCLUSIONS:This study suggested that a TH17/Treg balance toward a Treg-biased response favors the persistence of bacteria, causing chronic active gastritis.

authors

Gil JH,Seo JW,Cho MS,Ahn JH,Sung HY

doi

10.1097/MPG.0000000000000194

subject

Has Abstract

pub_date

2014-02-01 00:00:00

pages

245-51

issue

2

eissn

0277-2116

issn

1536-4801

journal_volume

58

pub_type

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