title: Atrial natriuretic peptide affects cardiac remodeling, function, heart failure, and survival in a mouse model of dilated cardiomyopathy.
abstract: Dilated cardiomyopathy is a frequent cause of heart failure and death. Atrial natriuretic peptide (ANP) is a biomarker of dilated cardiomyopathy, but there is controversy whether ANP modulates the development of heart failure. Therefore, we examined whether ANP affects heart failure, cardiac remodeling, function, and survival in a well-characterized, transgenic model of dilated cardiomyopathy. Mice with dilated cardiomyopathy with normal ANP levels survived longer than mice with partial ANP (P<0.01) or full ANP deficiency (P<0.001). In dilated cardiomyopathy mice, ANP protected against the development of heart failure as indicated by reduced lung water, alveolar congestion, pleural effusions, etc. ANP improved systolic function and reduced cardiomegaly. Pathological cardiac remodeling was diminished in mice with normal ANP as indicated by decreased ventricular interstitial and perivascular fibrosis. Mice with dilated cardiomyopathy and normal ANP levels had better systolic function (P<0.001) than mice with dilated cardiomyopathy and ANP deficiency. Dilated cardiomyopathy was associated with diminished cardiac transcripts for NP receptors A and B in mice with normal ANP and ANP deficiency, but transcripts for NP receptor C and C-type natriuretic peptide were selectively altered in mice with dilated cardiomyopathy and ANP deficiency. Taken together, these data indicate that ANP has potent effects in experimental dilated cardiomyopathy that reduce the development of heart failure, prevent pathological remodeling, preserve systolic function, and reduce mortality. Despite the apparent overlap in physiological function between the NPs, these data suggest that the role of ANP in dilated cardiomyopathy and heart failure is not compensated physiologically by other NPs.
authors.affiliation: Department of Medicine, University of Tennessee Health Science Center, Coleman, D334, 956 Court Ave, Memphis, TN 38163. glreed@uthsc.edu.
authors.forename: Dong
authors.initials: D
authors.lastname: Wang
authors.forename: Inna P
authors.initials: IP
authors.lastname: Gladysheva
authors.forename: Tai-Hwang M
authors.initials: TH
authors.lastname: Fan
authors.forename: Ryan
authors.initials: R
authors.lastname: Sullivan
authors.forename: Aiilyan K
authors.initials: AK
authors.lastname: Houng
authors.forename: Guy L
authors.initials: GL
authors.lastname: Reed
mesh_terms: D000818:Animals; D009320:Atrial Natriuretic Factor / Q000378:metabolism*; D002311:Cardiomyopathy, Dilated / Q000150:complications / Q000378:metabolism* / Q000503:physiopathology; D004195:Disease Models, Animal; D018450:Disease Progression; D006333:Heart Failure / Q000209:etiology / Q000378:metabolism* / Q000401:mortality; D006352:Heart Ventricles / Q000503:physiopathology*; D051379:Mice; D008810:Mice, Inbred C57BL; D015996:Survival Rate / Q000639:trends; D016277:Ventricular Function, Left / Q000502:physiology*; D020257:Ventricular Remodeling
chemical_list: D009320:Atrial Natriuretic Factor
keywords: atrial natriuretic peptide; cardiomyopathy, dilated; heart failure; natriuretic peptides