Shang Yu-Fu, Feng Wan-Di, Liu Dong-Ni, Zhang Wen-Fang, Xu Shuang, Feng Dan-Hong, Du Guan-Hua, Wang Yue-Hua
Beijing Key Laboratory of Innovative Drug Discovery and Polymorphic Druggability Research for Cerebrovascular Diseases, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China.
Molecules. 2025 Aug 4;30(15):3266. doi: 10.3390/molecules30153266.
Ischemic stroke is a serious disease that frequently occurs in the elderly and is characterized by a complex pathophysiology and a limited number of effective therapeutic agents. Salvianolic acid A (SAL-A) is a natural product derived from the rhizome of , which possesses diverse pharmacological activities. This study aims to investigate the effect and mechanisms of SAL-A in inhibiting ferroptosis to improve ischemic stroke. Brain injury, oxidative stress and ferroptosis-related analysis were performed to evaluate the effect of SAL-A on ischemic stroke in photochemical induction of stroke (PTS) in mice. Lipid peroxidation levels, antioxidant protein levels, tissue iron content, nuclear factor erythroid 2-related factor 2 (Nrf2), and mitochondrial morphology changes were detected to explore its mechanism. SAL-A significantly attenuated brain injury, reduced malondialdehyde (MDA) and long-chain acyl-CoA synthase 4 (ACSL4) levels. In addition, SAL-A also amplified the antioxidative properties of glutathione (GSH) when under glutathione peroxidase 4 (GPX4), and the reduction in ferrous ion levels. In vitro, brain microvascular endothelial cells (b.End.3) exposed to oxygen-glucose deprivation/reoxygenation (OGD/R) were used to investigate whether the anti-stroke mechanism of SAL-A is related to Nrf2. Following OGD/R, ML385 (Nrf2 inhibitor) prevents SAL-A from inhibiting oxidative stress, ferroptosis, and mitochondrial dysfunction in b.End.3 cells. In conclusion, SAL-A inhibits ferroptosis to ameliorate ischemic brain injury, and this effect is mediated through Nrf2.
缺血性中风是一种常见于老年人的严重疾病,其病理生理学复杂,有效治疗药物数量有限。丹酚酸A(SAL-A)是一种从丹参根茎中提取的天然产物,具有多种药理活性。本研究旨在探讨SAL-A抑制铁死亡以改善缺血性中风的作用及机制。通过脑损伤、氧化应激和铁死亡相关分析,评估SAL-A对小鼠光化学诱导中风(PTS)缺血性中风的影响。检测脂质过氧化水平、抗氧化蛋白水平、组织铁含量、核因子红细胞2相关因子2(Nrf2)和线粒体形态变化,以探讨其机制。SAL-A显著减轻脑损伤,降低丙二醛(MDA)和长链脂酰辅酶A合成酶4(ACSL4)水平。此外,SAL-A在谷胱甘肽过氧化物酶4(GPX4)存在的情况下还增强了谷胱甘肽(GSH)的抗氧化特性,并降低了亚铁离子水平。在体外,使用暴露于氧糖剥夺/复氧(OGD/R)的脑微血管内皮细胞(b.End.3)来研究SAL-A的抗中风机制是否与Nrf2有关。在OGD/R后,ML385(Nrf2抑制剂)可阻止SAL-A抑制b.End.3细胞中的氧化应激、铁死亡和线粒体功能障碍。总之,SAL-A通过抑制铁死亡改善缺血性脑损伤,且该作用是通过Nrf2介导的。
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