Research Area
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Description
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Cardiovascular Disease |
Biological Activity
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Description
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Nebivolol selectively inhibits β1-adrenoceptor with IC50 of 0.8 nM. |
Targets
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β1-adrenoceptor |
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IC50 |
0.8 nM [1] |
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In Vitro
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Nebivolol shows high affinity and selectivity for beta 1-adrenergic receptor sites in a rabbit lung membrane preparation (Ki value = 0.9 nM and beta 2/beta 1 ratio = 50). [1] Nebivolol displays β1-adrenoceptor selectivity with the Ki(β2)/Ki(β1) value of 40.7 judged by competition experiments to 3H-CGP 12.1777 in the presence of CGP 207.12 A (300 nM, Kiβ2) or ICI 118.551 (50 nM, Kiβ1). [2] Nebivolol reduces cell proliferation of human coronary smooth muscle cells (haCSMCs) and endothelial cells (haECs) in a concentration- and time-dependent maner. Nebivolol treatment for 7 days causes significant reduction in cell growth of haCSMCs with IC50 of 6.1 μM, and inhibits accelerated haCSMC proliferation stimulated by growth factors PDGF-BB, bFGF, and TGFβ with IC50 values of 6.8 μM, 6.4 μM and 7.7 μM, repectively. Nebivolol treatment (10-5 M) of haCSMCs for 48 hours induces a moderate apoptosis of 23% and a decrease from 16% to 5% in the number of cells in S-phase. During Nebivolol incubation, NO formation of HaCEs increases, while endothelin-1 transcription and secretion are suppressed. [3] |
In Vivo
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Administratiion of Nebivolol (initially by iv within 10 minutes of reperfusion and then orally) to rats with myocardial infarction (MI) reduces myocardial apoptosis, which is mediated by regulation of NO . Nebivolol, significantly, prevents left ventricular (LV) pressure changes, reduces total and regional apoptotic cardiomyocytes. Nebivolol treatment lowers mean blood pressure (MBP) in rats with MI slightly, but not significantly. [4] |
Clinical Trials
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A Phase IV study of comparative effects of Nebivolol versus Metoprololon on fatigue and quality of life has been completed. |
Features
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Nebivolol is highly cardioselective under certain circumstances. |
Protocol
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Cell Assay
[3]
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Cell Lines |
Human coronary smooth muscle cells (haCSMCs) and endothelial cells (haECs) |
Concentrations |
Dissolved in 100% methanol and diluted with three volumes of growth medium to obtain a stock solution of 10-3 M, final concentration 10-7~10-5 M |
Incubation Time |
1, 2, 4, 7 and 14 days |
Methods |
Cells are exposed to different concentrations of Nebivolol (10-7~10-5 M) for 1, 2, 4, 7 and 14 days. Cell proliferation is analyzed by bromodeoxyuridine (BrdU) incorporation, and cell apoptosis is detected by PI or annexin V staining. |
Animal Study
[4]
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Animal Models |
Male Sprague Dawley rat myocardial infarction (MI) model |
Formulation |
Dissolved in DMSO and diluted in saline |
Doses |
2.0 mg/kg |
Administration |
Gastric gavage once daily |
References |
[1] Pauwels PJ, et al. Mol Pharmacol, 1988, 34(6), 843-851.
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[2] Brixius K, et al. Br J Pharmacol, 2001, 133(8), 1330-1338.
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[3] Brehm BR, et al. Cardiovasc Res, 2001, 49(2), 430-439.
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[4] Mercanoglu G, et al. Circ J, 2008, 72(4), 660-670.
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