RAGE modulates myocardial injury consequent to LAD infarction via impact on JNK and STAT signaling in a murine model

被引：137

作者：

Aleshin, Alexey ^{[1
]}

Ananthakrishnan, Radha ^{[1
]}

Li, Qing ^{[1
]}

Rosario, Rosa ^{[1
]}

Lu, Yan ^{[1
]}

Qu, Wu ^{[1
]}

Song, Fei ^{[1
]}

Bakr, Soliman ^{[1
]}

Szabolcs, Matthias ^{[2
]}

D'Agati, Vivette ^{[2
]}

Liu, Rui ^{[3
]}

Homma, Shunichi ^{[3
]}

Schmidt, Ann Marie ^{[1
]}

Yan, Shi Fang ^{[1
]}

Ramasamy, Ravichandran ^{[1
]}

机构：

[1] Columbia Univ, Coll Phys & Surg, Dept Surg, New York, NY 10032 USA

[2] Columbia Univ, Coll Phys & Surg, Dept Pathol, New York, NY 10032 USA

[3] Columbia Univ, Coll Phys & Surg, Dept Med, New York, NY 10032 USA

来源：

AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY | 2008年 / 294卷 / 04期

关键词：

receptor for advanced glycation end-products; glycation end-products; myocardial infarction; left anterior descending coronary artery;

D O I：

10.1152/ajpheart.01210.2007

中图分类号：

R5 [内科学];

学科分类号：

1002 [临床医学]; 100201 [内科学];

摘要：

The receptor for advanced glycation end-products (RAGE) has been implicated in the pathogenesis of ischemia-reperfusion (I/R) injury in the isolated perfused heart. To test the hypothesis that RAGE-dependent mechanisms modulated responses to I/R in a murine model of transient occlusion and reperfusion of the left anterior descending coronary artery (LAD), we subjected male homozygous RAGE(-/-) mice and their wild-type age-matched littermates to 30 min of occlusion of the LAD followed by reperfusion. At 48 h of reperfusion, hematoxylin and eosin staining revealed significantly larger infarct size in wildtype versus RAGE(-/-) mice. Contractile function, as evaluated by echocardiography 48 h after reperfusion, revealed that fractional shortening was significantly higher in RAGE(-/-) versus wild-type mice. Plasma levels of creatine kinase were markedly decreased in RAGE(-/-) versus wild-type animals. Integral to the impact of RAGE deletion on diminished myocardial damage after infarction was significantly decreased apoptosis in the heart, as assessed by TUNEL staining, release of cytochrome c, and caspase-3 activity. Experiments investigating the impact of RAGE on early signaling pathways influencing myocardial ischemic injury revealed attenuation of JNK and STAT5 phosphorylation in RAGE(-/-) mouse hearts versus robust activation observed in wild-type mice upon ischemia and reperfusion. Solidifying the link to RAGE, these experiments revealed that infarction stimulated the rapid production of advanced glycation end-products in the heart. Thus, we tested the effect of ligand decoy soluble RAGE (sRAGE). Administration of sRAGE protected the myocardium from ischemic damage, similar to the effects observed in RAGE(-/-) mouse hearts. Taken together, these data implicate RAGE and its ligands in the pathogenesis of I/R injury and identify JNK and STAT signal transduction as central downstream effector pathways of the ligand-RAGE axis in the heart subjected to I/R injury.

引用

页码：H1823 / H1832

页数：10

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