Abstract
Beta 2-adrenergic receptors comprise 40% of the total beta-receptor population in failing human right ventricles, as deduced from computer modeling of iodine-125 iodocyanopindolol-ICI 118,551 competition curves. A myocardial cell origin of at least some of the beta 2 subpopulation was demonstrated by documenting a beta 2-receptor mediated positive inotropic response to the selective beta 2 agonist zinterol. It is concluded that beta 2-adrenergic receptors are present on human ventricular myocardial cells.
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Binding, Competitive
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Ethanolamines / metabolism
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Ethanolamines / pharmacology
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Heart / drug effects
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Heart Ventricles / drug effects
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Heart Ventricles / metabolism
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Myocardial Contraction / drug effects
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Myocardium / cytology
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Myocardium / metabolism*
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Propanolamines / metabolism
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Propanolamines / pharmacology
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Receptors, Adrenergic, beta / drug effects
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Receptors, Adrenergic, beta / metabolism*
Substances
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Ethanolamines
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Propanolamines
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Receptors, Adrenergic, beta
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ICI 118551
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zinterol