Blockade of NF-κB improves cardiac function and survival after myocardial infarction

Shunichi Kawano, Toru Kubota, Yoshiya Monden, Takaki Tsutsumi, Takahiro Inoue, Natsumi Kawamura, Hiroyuki Tsutsui, Kenji Sunagawa

研究成果: Contribution to journalArticle査読

117 被引用数 (Scopus)

抄録

NF-κB is a key transcription factor that regulates inflammatory processes. In the present study, we tested the hypothesis that blockade of NF-κB ameliorates cardiac remodeling and failure after myocardial infarction (MI). Knockout mice with targeted disruption of the p50 subunit of NF-κB (KO) were used to block the activation of NF-κB. MI was induced by ligation of the left coronary artery in male KO and age-matched wild-type (WT) mice. NF-κB was activated in noninfarct as well as infarct myocardium in WT + MI mice, while the activity was completely abolished in KO mice. Blockade of NF-κB significantly reduced early ventricular rupture after MI and improved survival by ameliorating congestive heart failure. Echocardiographic and pressure measurements revealed that left ventricular fractional shortening and maximum rate of rise of left ventricular pressure were significantly increased and end-diastolic pressure was significantly decreased in KO + MI mice compared with WT + MI mice. Histological analysis demonstrated significant suppression of myocyte hypertrophy as well as interstitial fibrosis in the noninfarct myocardium of KO + MI mice. Blockade of NF-κB did not ameliorate expression of proinflammatory cytokines in infarct or noninfarct myocardium. In contrast, phosphorylation of c-Jun NH2-terminal kinase was almost completely abolished in KO + MI mice. The present study demonstrates that targeted disruption of the p50 subunit of NF-κB reduces ventricular rupture as well as improves cardiac function and survival after MI. Blockade of NF-κB might be a new therapeutic strategy to attenuate cardiac remodeling and failure after MI.

本文言語英語
ページ(範囲)H1337-H1344
ジャーナルAmerican Journal of Physiology - Heart and Circulatory Physiology
291
3
DOI
出版ステータス出版済み - 2006
外部発表はい

All Science Journal Classification (ASJC) codes

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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