Helicobacter pylori Outer Membrane Protein 18 (Hp1125) Is Involved in Persistent Colonization by Evading Interferon- γ Signaling.
Helicobacter pylori Outer Membrane Protein 18 (Hp1125) Is Involved in Persistent Colonization by Evading Interferon- γ Signaling.
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幽门螺杆菌外膜蛋白 18 (Hp1125) 通过逃避干扰素伽马信号传导参与持续定植
DOI:
10.1155/2015/571280
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发表时间:
2015
影响因子:
--
通讯作者:
Jia J
中科院分区:
文献类型:
--
作者:
Shan Y;Lu X;Han Y;Li X;Wang X;Shao C;Wang L;Liu Z;Tang W;Sun Y;Jia J
Outer membrane proteins (OMPs) can induce an immune response. Omp18 (HP1125) of H. pylori is a powerful antigen that can induce significant interferon-γ (IFN-γ) levels. Previous studies have suggested that IFN-γ plays an important role in H. pylori clearance. However, H. pylori has multiple mechanisms to avoid host immune surveillance for persistent colonization. We generated an omp18 mutant (H. pylori 26695 and H. pylori SS1) strain to examine whether Omp18 interacts with IFN-γ and is involved in H. pylori colonization. qRT-PCR revealed that IFN-γ induced Omp18 expression. qRT-PCR and western blot analysis revealed reduced expressions of virulence factors CagA and NapA in H. pylori 26695 with IFN-γ treatment, but they were induced in the Δomp18 strain. In C57BL/6 mice infected with H. pylori SS1 and the Δomp18 strain, the Δomp18 strain conferred defective colonization and activated a stronger inflammatory response. Signal transducer phosphorylation and transcription 1 (STAT1) activator was downregulated by the wild-type strain but not the Δomp18 strain in IFN-γ-treated macrophages. Furthermore, Δomp18 strain survival rates were poor in macrophages compared to the wild-type strain. We concluded that H. pylori Omp18 has an important function influencing IFN-γ-mediated immune response to participate in persistent colonization.
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影响因子:
3.1
作者:
Mitchell, DJ;Huynh, HQ;Sherman, PM
通讯作者:
Sherman, PM
影响因子:
2.9
作者:
GREEN, LC;WAGNER, DA;TANNENBAUM, SR
通讯作者:
TANNENBAUM, SR
DOI:
10.1084/jem.187.1.135
发表时间:
1998-01-05
期刊:
The Journal of experimental medicine
影响因子:
--
作者:
Molinari M;Salio M;Galli C;Norais N;Rappuoli R;Lanzavecchia A;Montecucco C
通讯作者:
Montecucco C
影响因子:
5.8
作者:
Lee, SK;Stack, A;Josenhans, C
通讯作者:
Josenhans, C
影响因子:
3.4
作者:
CRABTREE, JE;COVACCI, A;RAPPUOLI, R
通讯作者:
RAPPUOLI, R