Abstract:
:Helicobacter pylori (H. pylori) produce an enzyme known as γ-glutamyl transpeptidase (HpGGT) that is highly conserved and common to all strains. HpGGT has been gaining increasing attention as an important virulence factor of the bacterium, having been demonstrated to be an important colonization factor in several animal models and has also recently been strongly associated with the development of peptic ulcer disease. From the results of various independent researcher groups, it is clear that HpGGT acts through several pathways to damage gastric epithelial cells including the induction of apoptosis and cell cycle arrest, production of reactive oxygen species leading to DNA damage, promotion of inflammation by increasing cyclooxygenase-2 and interleukin-8 expression, and upregulation of heparin-binding epidermal growth factor-like growth factor resulting in cell survival and proliferation. In addition, the potential role of HpGGT in promoting gastric carcinogenesis will also be discussed in this review. Apart from affecting the gastric epithelium, HpGGT also has immunomodulatory actions on host immune cells where it displays an antiproliferative effect on T cells by inducing cell cycle arrest and also works with other H. pylori virulence factors to skew dendritic cells towards a tolerogenic phenotype, possibly contributing to the persistence of the pathogen in the gastric mucosa.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Ling SS,Yeoh KG,Ho Bdoi
10.3748/wjg.v19.i45.8203subject
Has Abstractpub_date
2013-12-07 00:00:00pages
8203-10issue
45eissn
1007-9327issn
2219-2840journal_volume
19pub_type
杂志文章,评审abstract:AIM:To investigate the role of MHC class II in the modulation of gastric epithelial cell apoptosis induced by H pylori infection. METHODS:After stimulating a human gastric epithelial cell line with bacteria or agonist antibodies specific for MHC class II and CD95, the quantitation of apoptotic and anti-apoptotic event...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.15.737
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journal_title:World journal of gastroenterology
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doi:10.3748/wjg.v24.i28.3145
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doi:10.3748/wjg.v13.i3.462
更新日期:2007-01-21 00:00:00
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doi:10.3748/wjg.v10.i5.737
更新日期:2004-03-01 00:00:00
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doi:10.3748/wjg.v10.i7.1043
更新日期:2004-04-01 00:00:00
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pub_type: 杂志文章,meta分析
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更新日期:2018-08-07 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v19.i3.375
更新日期:2013-01-21 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2014-05-28 00:00:00
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pub_type: 杂志文章
doi:10.3748/wjg.v3.i4.225
更新日期:1997-12-15 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v22.i31.7099
更新日期:2016-08-21 00:00:00
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pub_type: 杂志文章,评审
doi:10.3748/wjg.v20.i2.414
更新日期:2014-01-14 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
doi:10.3748/wjg.v22.i27.6201
更新日期:2016-07-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v18.i36.5096
更新日期:2012-09-28 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v13.i21.2918
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pub_type: 杂志文章
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v26.i11.1156
更新日期:2020-03-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
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更新日期:2017-08-14 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
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更新日期:2011-08-21 00:00:00
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journal_title:World journal of gastroenterology
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更新日期:2006-12-14 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,meta分析
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更新日期:2010-08-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
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更新日期:2011-08-07 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 社论
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更新日期:2018-11-28 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,评审
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更新日期:2006-08-14 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,多中心研究
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更新日期:2012-04-14 00:00:00