期刊
CIRCULATION RESEARCH
卷 106, 期 1, 页码 133-144出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1161/CIRCRESAHA.109.202200
关键词
cardiomyopathy; nuclear factor kappa B; heart failure; knockout mice
资金
- Leducq Transatlantic Networks of Excellence for Cardiovascular Research Program [04CVD03]
- European Commission [LSHM-CT-2005-018630]
- MRC [G0600872] Funding Source: UKRI
- Medical Research Council [G0600872] Funding Source: researchfish
Rationale: Insight into the function of nuclear factor (NF)-kappa B in the adult heart has been hampered by the embryonic lethality of constitutive NF-kappa B inactivation. Objective: The goal of the present study was therefore to gain insights into the role of NF-kappa B pathway specifically in mouse cardiomyocytes by conditional deletion of the NF-kappa B essential modulator (NEMO). Methods and Results: Using a Cre/loxP system, we disrupted the Nemo gene in a cardiomyocyte-specific manner in the heart, which simulated gene expression changes underlying human heart failure and caused adult-onset dilated cardiomyopathy accompanied by inflammation and apoptosis. Pressure overload challenges of NEMO-deficient young hearts precociously induced the functional decrements that develop spontaneously in older knockout animals. Moreover, oxidative stress in NEMO-deficient cardiomyocytes is a critical pathological component that can be attenuated with antioxidant diet in vivo. Conclusions: These results reveal an essential physiological role for NEMO-mediated signaling in the adult heart to maintain cardiac function in response to age-related or mechanical challenges, in part through modulation of oxidative stress. (Circ Res. 2010;106:133-144.)
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