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This Article Full Text Full Text (PDF) All Versions of this Article: 292/1/H530    most recent 00549.2006v1 Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (1) Citing Articles via Google Scholar Google Scholar Articles by Onai, Y. Articles by Isobe, M. Search for Related Content PubMed PubMed Citation Articles by Onai, Y. Articles by Isobe, M.

Inhibition of NF-B improves left ventricular remodeling and cardiac dysfunction after myocardial infarction

¹Department of Cardiovascular Medicine, Tokyo Medical and Dental University; and ²Institute of Medicinal Molecular Design, Tokyo, Japan

Submitted 29 May 2006 ; accepted in final form 12 August 2006

Several studies have demonstrated that NF-B is substantially involved in the progression of cardiac remodeling; however, it remains uncertain whether the continuous inhibition of NF-B is effective for the prevention of myocardial remodeling. Myocardial infarction (MI) was produced by ligation of the left anterior coronary artery of rats. IMD-0354 (10 mg/kg per day), a novel phosphorylation inhibitor of IB that acts via inhibition of IKK-, was injected intraperitoneally starting 24 h after induction of MI for 28 days. After 28 days, the IMD-0354-treated group showed significantly improved survival rate compared with that of the vehicle-treated group (P < 0.05). Although infarct size was similar in both groups, improved left ventricular (LV) remodeling and diastolic dysfunction, as indicated by smaller LV cavity (LV end-diastolic area: vehicle, 74.13 ± 3.57 mm²; IMD-0354, 55.00 ± 3.73 mm²; P < 0.05), smaller peak velocity of early-to-late filling wave (E/A) ratio (vehicle, 3.87 ± 0.26; IMD-0354, 2.61 ± 0.24; P < 0.05), and lower plasma brain natriuretic peptide level (vehicle, 167.63 ± 14.87 pg/ml; IMD-0354, 110.75 ± 6.41 pg/ml; P < 0.05), were observed in the IMD-0354-treated group. Moreover, fibrosis, accumulation of macrophages, and expression of several factors (transforming growth factor-1, monocyte chemoattractant protein-1, matrix metalloproteinase-9 and -2) in the noninfarcted myocardium was remarkably inhibited by IMD-0354. In conclusion, inhibition of NF-B activation may reduce the proinflammatory reactions and modulate the extracellular matrix and provide an effective approach to prevent adverse cardiac remodeling after MI.

experimental heart failure; nuclear factor-b; matrix metalloproteinase; echocardiography

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