Abstract:
:Receptor for advanced glycation end products (RAGE) is a member of the immunoglobulin superfamily of cell surface molecules and engages diverse ligands relevant to distinct pathological processes. One class of RAGE ligands includes glycoxidation products, termed advanced glycation end products, which occur in diabetes, at sites of oxidant stress in tissues, and in renal failure and amyloidoses. RAGE also functions as a signal transduction receptor for amyloid beta peptide, known to accumulate in Alzheimer disease in both affected brain parenchyma and cerebral vasculature. Interaction of RAGE with these ligands enhances receptor expression and initiates a positive feedback loop whereby receptor occupancy triggers increased RAGE expression, thereby perpetuating another wave of cellular activation. Sustained expression of RAGE by critical target cells, including endothelium, smooth muscle cells, mononuclear phagocytes, and neurons, in proximity to these ligands, sets the stage for chronic cellular activation and tissue damage. In a model of accelerated atherosclerosis associated with diabetes in genetically manipulated mice, blockade of cell surface RAGE by infusion of a soluble, truncated form of the receptor completely suppressed enhanced formation of vascular lesions. Amelioration of atherosclerosis in these diabetic/atherosclerotic animals by soluble RAGE occurred in the absence of changes in plasma lipids or glycemia, emphasizing the contribution of a lipid- and glycemia-independent mechanism(s) to atherogenesis, which we postulate to be interaction of RAGE with its ligands. Future studies using mice in which RAGE expression has been genetically manipulated and with selective low molecular weight RAGE inhibitors will be required to definitively assign a critical role for RAGE activation in diabetic vasculopathy. However, sustained receptor expression in a microenvironment with a plethora of ligand makes possible prolonged receptor stimulation, suggesting that interaction of cellular RAGE with its ligands could be a factor contributing to a range of important chronic disorders.
journal_name
Circ Resjournal_title
Circulation researchauthors
Schmidt AM,Yan SD,Wautier JL,Stern Ddoi
10.1161/01.res.84.5.489subject
Has Abstractpub_date
1999-03-19 00:00:00pages
489-97issue
5eissn
0009-7330issn
1524-4571journal_volume
84pub_type
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journal_title:Circulation research
pub_type: 杂志文章
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pub_type: 杂志文章
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更新日期:2006-03-17 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
doi:10.1161/CIRCRESAHA.109.212969
更新日期:2010-06-25 00:00:00
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journal_title:Circulation research
pub_type: 杂志文章
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更新日期:1999-02-19 00:00:00
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更新日期:2013-01-18 00:00:00
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pub_type: 杂志文章
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更新日期:2004-05-14 00:00:00
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pub_type: 杂志文章
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更新日期:1990-01-01 00:00:00
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更新日期:2002-11-29 00:00:00
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更新日期:1981-09-01 00:00:00
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更新日期:1991-03-01 00:00:00
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pub_type: 杂志文章
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更新日期:2003-03-21 00:00:00
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journal_title:Circulation research
pub_type: 杂志文章
doi:10.1161/01.res.62.5.1001
更新日期:1988-05-01 00:00:00
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pub_type: 杂志文章
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更新日期:2015-09-11 00:00:00
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更新日期:2005-11-11 00:00:00
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pub_type: 杂志文章,多中心研究
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更新日期:2015-09-11 00:00:00
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更新日期:1998-11-02 00:00:00
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journal_title:Circulation research
pub_type: 杂志文章
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更新日期:1997-07-01 00:00:00
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更新日期:2011-02-18 00:00:00