BAY 11-7082, a Nuclear Factor-.KAPPA.B Inhibitor, Reduces Inflammation and Apoptosis in a Rat Cardiac Ischemia-Reperfusion Injury Model
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概要
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Despite development of therapeutic modalities, myocardial ischemia-reperfusion (I/R) injury remains an important cause of cardiac dysfunction. Multiple strategies exist experimentally, but few are clinically available. Nuclear factor kappa-B (NF-κB) is a key transcription factor in the inflammatory response and is implicated in I/R injury. We hypothesized that the NFκB inhibitor BAY 11-7082 (BAY) would decrease the extent of injury after myocardial I/R. Hypoxia-reoxygenation (H/R) was induced in rat neonatal cardiomyocytes with or without BAY pretreatment. NF-κB activation, vascular cell adhesion molecule (VCAM)-1, and monocyte chemoattractant protein (MCP)-1 were assayed by immunocytochemistry, Western blot or reverse transcriptase-polymerase chain reaction (RT-PCR). Sprague-Dawley rats (n = 7) were administered BAY (130 μg/kg) and I/R was induced by ligation of the left anterior descending artery (LAD) for 30 minutes followed by reperfusion. Infarct size was analyzed after 24 hours. At 2 weeks, echocardiography was performed to evaluate ventricular function and hearts were analyzed for fibrosis and apoptosis. BAY treatment inhibited NF-κB p65 activation, as well as VCAM-1 and MCP-1 expression induced by H/R in cardiomyocytes. Compared with control rats, BAY pretreated rats showed reduced infarct size. Echocardiograms demonstrated preserved systolic function as a fractional shortening in the BAY+I/R group (P < 0.05). Fibrosis was reduced in the BAY+I/R group (P < 0.05) and apoptosis was also reduced in the BAY+I/R group (P < 0.05).In the rat myocardial I/R injury model, BAY significantly reduced the infarct size, and preserved myocardial function. These data demonstrate that a currently available and well-tolerated inhibitor of NF-κB can decrease the risk of myocardial injury associated with I/R.
著者
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Kwon Jin
Heart Center of Chonnam National University Hospital
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Kim Yong
Heart Center of Chonnam National University Hospital
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Jeong Myung
Heart Center Chonnam National University Hospital
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Ahn Youngkeun
Heart Center Chonnam National University Hospital
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Cho Jeong
Heart Center Of Chonnam National University Hospital
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Park Jong
Heart Center Of Chonnam National University Hospital
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Kang Jung
Heart Center Of Chonnam National University Hospital
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Kim Ji
Department of Advanced Materials Engineering, Sangju National University, Kyeongbuk 742-711, Korea
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Jeong Myung
Heart Research Center, Chonnam National University Hospital
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Ahn Youngkeun
Heart Research Center, Chonnam National University Hospital
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Cho Jeong
Heart Research Center, Chonnam National University Hospital
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Kang Jung
Heart Research Center, Chonnam National University Hospital
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Kwon Jin
Heart Research Center, Chonnam National University Hospital
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Kim Ji
Department of Internal Medicine, Bundang CHA General Hospital
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