Publication Date:
1995-06-02
Description:
Transgenic mice were created with cardiac-specific overexpression of the beta-adrenergic receptor kinase-1 (beta ARK1) or a beta ARK inhibitor. Animals overexpressing beta ARK1 demonstrated attenuation of isoproterenol-stimulated left ventricular contractility in vivo, dampening of myocardial adenylyl cyclase activity, and reduced functional coupling of beta-adrenergic receptors. Conversely, mice expressing the beta ARK inhibitor displayed enhanced cardiac contractility in vivo with or without isoproterenol. These animals demonstrate the important role of beta ARK in modulating in vivo myocardial function. Because increased amounts of beta ARK1 and diminished cardiac beta-adrenergic responsiveness characterize heart failure, these animals may provide experimental models to study the role of beta ARK in heart disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koch, W J -- Rockman, H A -- Samama, P -- Hamilton, R A -- Bond, R A -- Milano, C A -- Lefkowitz, R J -- 5F32-CA09350/CA/NCI NIH HHS/ -- HL-16037/HL/NHLBI NIH HHS/ -- New York, N.Y. -- Science. 1995 Jun 2;268(5215):1350-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, Duke University Medical Center, Durham, NC 27710, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7761854" target="_blank"〉PubMed〈/a〉
Keywords:
Adenylyl Cyclases/metabolism
;
Animals
;
Blood Pressure
;
Cyclic AMP-Dependent Protein Kinases/antagonists &
;
inhibitors/genetics/*metabolism
;
GTP-Binding Proteins/metabolism
;
Heart/*physiology
;
Isoproterenol/pharmacology
;
Mice
;
Mice, Transgenic
;
*Myocardial Contraction/drug effects
;
Myocardium/*enzymology
;
Phenotype
;
Receptors, Adrenergic, beta/*metabolism
;
Sarcolemma/enzymology
;
Ventricular Pressure
;
beta-Adrenergic Receptor Kinases
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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