Chronic β1-adrenergic blockade enhances myocardial β3-adrenergic coupling with nitric oxide-cGMP signaling in a canine model of chronic volume overload: new insight into mechanisms of cardiac benefit with selective β1-blocker therapy.
β1-肾上腺素能拮抗剂美托洛尔可改善慢性心力衰竭、孤立性二尖瓣反流(MR)和缺血性心脏病动物及患者心功能,但机制未明。美托洛尔可上调心肌β3-肾上腺素能受体(β3AR)表达,β3AR经神经元一氧化氮合酶(nNOS)介导的信号具有心脏保护作用。本研究检测美托洛尔慢性β1阻断是否增强MR诱导容量负荷过重犬心脏中β3AR与一氧化氮-环磷酸...