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

Research output: Contribution to journalArticle

106 Citations (Scopus)

Abstract

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.

Original languageEnglish
JournalAmerican Journal of Physiology - Heart and Circulatory Physiology
Volume291
Issue number3
DOIs
Publication statusPublished - Sep 13 2006
Externally publishedYes

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Myocardial Infarction
Myocardium
Heart Failure
Rupture
JNK Mitogen-Activated Protein Kinases
Ventricular Pressure
Knockout Mice
Muscle Cells
Hypertrophy
Ligation
Coronary Vessels
Fibrosis
Transcription Factors
Phosphorylation
Cytokines
Blood Pressure
Pressure

All Science Journal Classification (ASJC) codes

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

Cite this

Blockade of NF-κB improves cardiac function and survival after myocardial infarction. / Kawano, Shunichi; Kubota, Toru; Monden, Yoshiya; Tsutsumi, Takaki; Inoue, Takahiro; Kawamura, Natsumi; Tsutsui, Hiroyuki; Sunagawa, Kenji.

In: American Journal of Physiology - Heart and Circulatory Physiology, Vol. 291, No. 3, 13.09.2006.

Research output: Contribution to journalArticle

Kawano, Shunichi ; Kubota, Toru ; Monden, Yoshiya ; Tsutsumi, Takaki ; Inoue, Takahiro ; Kawamura, Natsumi ; Tsutsui, Hiroyuki ; Sunagawa, Kenji. / Blockade of NF-κB improves cardiac function and survival after myocardial infarction. In: American Journal of Physiology - Heart and Circulatory Physiology. 2006 ; Vol. 291, No. 3.
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