Oxygen Deprivation Triggers Upregulation of Early Growth Response-1 by the Receptor for Advanced Glycation End Products

Authors:
Chang JS, Wendt T, Qu W, Kong L, Zou YS, Schmidt AM, Yan SF
In:
Source: Circ Res
Publication Date: (2008)
Issue: 102(8): 905-13
Research Area:
Cardiovascular
Cells used in publication:
Endothelial, aortic, human (HAEC)
Species: human
Tissue Origin: aortic
Platform:
Nucleofector® I/II/2b
Abstract
Myocardial infarction, stroke, and venous thromboembolism are characterized by oxygen deprivation. In hypoxia, biological responses are activated that evoke tissue damage. Rapid activation of early growth response-1 in hypoxia upregulates fundamental inflammatory and prothrombotic stress genes. We probed the mechanisms mediating regulation of early growth response-1 and demonstrate that hypoxia stimulates brisk generation of advanced glycation end products (AGEs) by endothelial cells. Via AGE interaction with their chief signaling receptor, RAGE, membrane translocation of protein kinase C-betaII occurs, provoking phosphorylation of c-Jun NH2-terminal kinase and increased transcription of early growth response-1 and its downstream target genes. These findings identify RAGE as a master regulator of tissue stress elicited by hypoxia and highlight this receptor as a central therapeutic target to suppress the tissue injury-provoking effects of oxygen deprivation.