What question did this study set out to answer?

To determine whether nebivolol, its enantiomers, or its hepatic metabolites stimulate endothelial nitric oxide production and to identify the underlying physiological mechanism.

June 1, 2006American Journal of Hypertension

Characterization of Nitric Oxide Release by Nebivolol and Its Metabolites

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Population

Conductance and resistance arteries from Wistar-Kyoto rats (WKY) (n = 33)

Comparison

Nebivolol, its enantiomers, and its three main… vs Atenolol

Design

Preclinical

Authors

AMAngelo MaffeiIstituto Neurologico Mediterraneo CVCarmine VecchioneGeneral Cardiology AAAlessandra AretiniIstituto Neurologico Mediterraneo

Discussion

Member takes

Implication

Highlights nebivolol's distinct endothelial effects in rat models; leaves open translation to human hypertension therapy.

Key Points

To determine whether nebivolol, its enantiomers, or its hepatic metabolites stimulate endothelial nitric oxide production and to identify the underlying physiological mechanism.
Extracted conductance and resistance arteries from Wistar-Kyoto rats (n = 33) and loaded them with the fluorescent probe diaminofluorescein-2 (DAF-2).
Stimulated vascular tissues with increasing concentrations of nebivolol, its d- and l-enantiomers, three major hepatic metabolites, and atenolol to histologically measure nitric oxide release.
Nebivolol stimulated a dose-dependent increase in endothelial nitric oxide release across both conductance and resistance arteries, reaching significance at 10⁻⁶ mol/L and plateauing at 10⁻⁵ mol/L, whereas atenolol produced no effect.
Nitric oxide induction was mediated predominantly by the d-enantiomer, was fully sustained by all three primary hepatic metabolites, and required intracellular calcium mobilization.

Structured PICO

Population

Conductance and resistance arteries from Wistar-Kyoto rats (WKY) (n = 33)

Intervention

Nebivolol, its enantiomers (specifically D-isomer), and its three main metabolites at increasing concentrations

Comparator

Atenolol

Outcome

Nitric oxide (NO) release evaluated histologically using the fluorescent probe diaminofluorescein-2 (DAF-2)surrogate

Nebivolol and its metabolites induce endothelial nitric oxide production in rat arteries through a calcium-dependent mechanism, primarily driven by the D-isomer.

Cite This Study

Maffei et al. (2006) studied this question.

synapsesocial.com/papers/6a81bc9abcfc941b47bf6c03 https://doi.org/10.1016/j.amjhyper.2005.09.021

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Characterization of Nitric Oxide Release by Nebivolol and Its Metabolites

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Characterization of Nitric Oxide Release by Nebivolol and Its Metabolites

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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Also Consider