Abstract |
Ventricular myocytes are known to show increased expression of the cardiac hormones atrial and brain natriuretic peptide ( ANP and BNP, respectively) in response to pathological stress on the heart, but their function during the progression of nonischemic dilated cardiomyopathy remains unclear. In this study, we crossed a mouse model of dilated cardiomyopathy and sudden death, which we generated by cardioselectively overexpressing a dominant-negative form of the transcriptional repressor neuron-restrictive silencer factor (dnNRSF Tg mice), with mice lacking guanylyl cyclase-A (GC-A), a common receptor for ANP and BNP, to assess the effects of endogenously expressed natriuretic peptides during progression of the cardiomyopathy seen in dnNRSF Tg mice. We found that dnNRSF Tg;GC-A(-/-) mice were born normally, but then most died within 4 wk. The survival rates among dnNRSF Tg;GC-A(+/-) and dnNRSF Tg mice were comparable, but dnNRSF Tg;GC-A(+/-) mice showed greater systolic dysfunction and a more severe cardiomyopathic phenotype than dnNRSF Tg mice. Collectively, our findings suggest that endogenous ANP/BNP protects the heart against the death and progression of pathological remodeling in a mouse model of dilated cardiomyopathy and sudden death.
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Authors | Shinji Yasuno, Satoru Usami, Koichiro Kuwahara, Michio Nakanishi, Yuji Arai, Hideyuki Kinoshita, Yasuaki Nakagawa, Masataka Fujiwara, Masao Murakami, Kenji Ueshima, Masaki Harada, Kazuwa Nakao |
Journal | American journal of physiology. Heart and circulatory physiology
(Am J Physiol Heart Circ Physiol)
Vol. 296
Issue 6
Pg. H1804-10
(Jun 2009)
ISSN: 0363-6135 [Print] United States |
PMID | 19346456
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- RE1-silencing transcription factor
- RNA, Messenger
- Repressor Proteins
- Natriuretic Peptide, Brain
- Atrial Natriuretic Factor
- Receptors, Atrial Natriuretic Factor
- atrial natriuretic factor receptor A
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Topics |
- Animals
- Atrial Natriuretic Factor
(genetics, metabolism)
- Cardiomyopathy, Dilated
(mortality, pathology, physiopathology)
- Death, Sudden, Cardiac
(prevention & control)
- Disease Models, Animal
- Female
- Gene Expression
(physiology)
- Kaplan-Meier Estimate
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Myocardium
(metabolism, pathology)
- Natriuretic Peptide, Brain
(genetics, metabolism)
- Phenotype
- RNA, Messenger
(metabolism)
- Receptors, Atrial Natriuretic Factor
(genetics)
- Repressor Proteins
(genetics)
- Systole
- Ventricular Remodeling
(physiology)
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