Department of Pathology, Changhua Christian Hospital, Changhua, 500, Taiwan; Department of Medical Technology, Jen-Teh Junior College of Medicine, Nursing and Management, Taipei, 11260, Taiwan.
Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien, Taiwan.
Food Chem Toxicol. 2021 Jan;147:111837. doi: 10.1016/j.fct.2020.111837. Epub 2020 Nov 17.
Toll-like receptor 4 (TLR4) is an important mediator of hypertension and AngII induced cardiac inflammation and remodelling. In this study, the potential of nerolidol to ameliorate hypertension induced cardiac injuries and the underlying mechanism of action was explored by using in vitro and in vivo models. The in vitro analysis was performed on AngII challenged H9c2 cells and their ability to overcome cardiac inflammation and cardiac remodelling effects was determined by evaluating TLR4/NF-κB signalling cascade using Western blot analysis and immunofluorescence. The results were further ascertained using in vivo experiments. Eighteen week old male rats were randomly allocated into different groups i.e. Wistar Kyoto (WKY) rats, hypertensive SHRs, SHRs treated with a low-dose (75 mg/kg b.w) and high-dose of nerolidol (150 mg/kg b.w) and SHRs treated with captopril (50 mg/kg b.w) through oral gauge and finally analysed through echocardiography, histopathological techniques and molecular analysis. The results show that nerilodol target TLR4/NF-κB signalling and thereby attenuate hypertension associated inflammation and oxidative stress thereby provides effective cardioprotection. Echocardiography analysis showed that nerolidol improved cardiac functional characteristics including Ejection Fraction and Fractional Shortening in the SHRs. Collectively, the data of the study demonstrates nerolidol as a cardio-protective agent against hypertension induced cardiac remodelling.
Toll-like receptor 4 (TLR4) 是高血压和 AngII 引起的心脏炎症和重塑的重要介质。在这项研究中,通过使用体外和体内模型,探索了橙花叔醇改善高血压引起的心脏损伤的潜力及其作用机制。在 AngII 刺激的 H9c2 细胞上进行了体外分析,并通过 Western blot 分析和免疫荧光评估 TLR4/NF-κB 信号级联来确定其克服心脏炎症和心脏重塑作用的能力。使用体内实验进一步证实了这一点。将 18 周龄雄性大鼠随机分为不同组,即 Wistar Kyoto (WKY) 大鼠、高血压 SHRs、用低剂量(75mg/kg b.w)和高剂量橙花叔醇(150mg/kg b.w)治疗的 SHRs 和用卡托普利(50mg/kg b.w)治疗的 SHRs 通过口服剂量分配,并最终通过超声心动图、组织病理学技术和分子分析进行分析。结果表明,橙花叔醇靶向 TLR4/NF-κB 信号通路,从而减轻与高血压相关的炎症和氧化应激,从而提供有效的心脏保护。超声心动图分析表明,橙花叔醇改善了 SHRs 的心脏功能特征,包括射血分数和缩短分数。总的来说,该研究的数据表明橙花叔醇是一种对抗高血压引起的心脏重塑的心脏保护剂。
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