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Oxygen deprivation triggers upregulation of early growth response-1 by the receptor for advanced glycation end products.

by: JS Chang, T Wendt, W Qu, L Kong, YS Zou, AM Schmidt, SF Yan
Circulation research, Vol. 102, No. 8. (25 April 2008), pp. 905-913.


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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 NH(2)-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.


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