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2017 ; 37
(4
): 613-621
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22016 ATVB Plenary Lecture: Receptor for Advanced Glycation Endproducts and
Implications for the Pathogenesis and Treatment of Cardiometabolic Disorders:
Spotlight on the Macrophage
#MMPMID28183700
Schmidt AM
Arterioscler Thromb Vasc Biol
2017[Apr]; 37
(4
): 613-621
PMID28183700
show ga
The receptor for advanced glycation endproducts (RAGE) interacts with a unique
repertoire of ligands that form and collect in the tissues and circulation in
diabetes mellitus, aging, inflammation, renal failure, and obesity. RAGE is
expressed on multiple cell types linked to tissue perturbation in these settings.
This brief review focuses on the role of RAGE in monocytes/macrophages and how
RAGE ligand engagement on these cells mediates seminal changes in
monocyte/macrophage migration, oxidative stress, cholesterol efflux, and pro-
versus anti-inflammatory cues that signal to tissue damage. Studies using mice
devoid of Ager (gene encoding RAGE) or pharmacological antagonists of RAGE are
protective in animal models of diabetes mellitus, atherosclerosis, and high-fat
diet-induced obesity, in least in part through key roles in
monocytes/macrophages. RAGE signal transduction requires the interaction of RAGE
cytoplasmic domain with the formin, DIAPH1 (diaphanous 1) and novel antagonists
of this interaction show significant promise in attenuation of the maladaptive
effects of RAGE ligands in cellular and in vivo models. Finally, this brief
review discusses evidence for RAGE axis perturbation in human
monocytes/macrophages and how tracing RAGE activity in these cells may identify
target engagement biomarkers of RAGE antagonism for future clinical trials.