Abstract:
AIM:To investigate the molecular mechanism and functional consequences of heme oxygenase-1 (HO-1) activation by lansoprazole in endothelial cells and macrophages. METHODS:Expression of HO-1 mRNA was analyzed by Northern blotting. Western blotting was used to determine the HO-1 and ferritin protein levels. NADPH-dependent reactive oxygen species (ROS) formation was measured with lucigenin-enhanced chemiluminescence. HO-1 promoter activity in mouse fibroblasts, stably transfected with a 15-kb HO-1 gene that drives expression of the reporter gene luciferase, was assessed using in vivo bioluminescence imaging. RESULTS:Lansoprazole increased HO-1 mRNA levels in endothelial cells and HO-1 protein levels in macrophages. In addition, lansoprazole-induced ferritin protein levels in both cell systems. Moreover, induction of the antioxidant proteins HO-1 and ferritin by lansoprazole was followed by a decrease in NADPH-mediated ROS formation. The radical scavenging properties of lansoprazole were diminished in the presence of the HO inhibitor, chromium mesoporphyrin IX. Induction of HO-1 gene expression by lansoprazole was not related to oxidative stress or to the activation of the mitogen-activated protein kinase pathway. However, the phosphatidylinositol 3-kinase inhibitor LY294002 showed a concentration-dependent inhibition of HO-1 mRNA and promoter activity. CONCLUSION:Activation of HO-1 and ferritin may account for the gastric protection of lansoprazole and is dependent on a pathway blocked by LY294002.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Schulz-Geske S,Erdmann K,Wong RJ,Stevenson DK,Schröder H,Grosser Ndoi
10.3748/wjg.15.4392subject
Has Abstractpub_date
2009-09-21 00:00:00pages
4392-401issue
35eissn
1007-9327issn
2219-2840journal_volume
15pub_type
杂志文章abstract:AIM:To identify a molecular marker for gastric cancer, and to investigate the relationship between the polymorphism of pepsinogen C (PGC) gene and the genetic predisposition to gastric cancer. METHODS:A total of 289 cases were involved in this study. 115 cases came from Shenyang area, a low risk area of gastric cancer...
journal_title:World journal of gastroenterology
pub_type: 杂志文章
doi:10.3748/wjg.v9.i1.50
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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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pub_type: 社论
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更新日期:2009-05-28 00:00:00
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pub_type: 杂志文章,评审
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pub_type: 杂志文章,多中心研究,随机对照试验
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pub_type: 历史文章,杂志文章,评审
doi:10.3748/wjg.v20.i47.17819
更新日期:2014-12-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 杂志文章,随机对照试验
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更新日期:2016-02-07 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:2014-10-21 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2012-05-14 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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pub_type: 社论,评审
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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:2014-05-21 00:00:00
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journal_title:World journal of gastroenterology
pub_type: 评论,信件
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更新日期:2009-08-28 00:00:00
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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,评审
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更新日期:2016-12-07 00:00:00
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pub_type: 杂志文章
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更新日期:2011-02-07 00:00:00
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更新日期:2015-04-28 00:00:00