首页> 外文期刊>Canadian Journal of Physiology and Pharmacology >Antihypertensive effects of fargesin in vitro and in vivo via attenuating oxidative stress and promoting nitric oxide release
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Antihypertensive effects of fargesin in vitro and in vivo via attenuating oxidative stress and promoting nitric oxide release

机译:Fargesin在体内和体外通过减轻氧化应激和促进一氧化氮释放而产生的降压作用

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摘要

Fargesin, a bioactive neolignan isolated from magnolia plants, is widely used in the treatment of managing rhinitis, inflammation, histamine, sinusitis, and headache. To provide more biological information about fargesin, we investigated the effects of fargesin on rat aortic rings and 2-kidney, 1-clip (2K1C) hypertensive rats. In vitro, fargesin caused concentration-dependent vasorelaxation in rat isolated aortic rings induced by KCl and norepinephrine. The effect was weakened by endothelium denudation and nitric oxide (NO) synthesis inhibition. In vivo, the evolution of systolic blood pressure (SBP) was followed by weekly measurements. Angiotensin II (Ang II) and endothelin (ET) levels, NO and nitric oxide synthase (NOS), and plasma and liver oxidative stress markers were determined at the end of the experimental period. After 5 weeks of fargesin treatment, we found that fargesin treatment reduced SBP, cardiac hypertrophy, and Ang II and ET levels of hypertensive rats. Increased NOS activity and NO level were observed in fargesin-treated rats. Normalisation of plasma MDA concentrations and improvement of the antioxidant defence system in plasma and liver accompanied the antihypertensive effect of fargesin. Taken together, these results provided substantial evidences that fargesin has antihypertensive effect in 2K1C hypertensive rats via inhibiting oxidative stress and promoting NO release.
机译:Fargesin是一种从木兰植物中分离出来的具有生物活性的新木脂素,被广泛用于治疗鼻炎,炎症,组胺,鼻窦炎和头痛。为了提供有关fargesin的更多生物学信息,我们研究了fargesin对大鼠主动脉环和2肾1夹(2K1C)高血压大鼠的作用。在体外,fargesin引起由KCl和去甲肾上腺素诱导的大鼠离体主动脉环中浓度依赖性血管舒张。内皮剥脱和一氧化氮(NO)合成抑制作用减弱了这种作用。在体内,每周测量一次收缩压(SBP)的演变。在实验期结束时确定了血管紧张素II(Ang II)和内皮素(ET)的水平,NO和一氧化氮合酶(NOS)以及血浆和肝脏的氧化应激标志物。经过Fargesin治疗5周后,我们发现Fargesin治疗可降低高血压大鼠的SBP,心脏肥大以及Ang II和ET水平。在经Fargesin处理的大鼠中观察到NOS活性和NO水平升高。血浆MDA浓度的正常化以及血浆和肝脏中抗氧化防御系统的改善伴随有fargesin的降压作用。综上所述,这些结果提供了充分的证据,证明法尔菌素通过抑制氧化应激和促进NO释放对2K1C高血压大鼠具有降压作用。

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