神经保护
药理学
氧化应激
缺血
活性氧
化学
血栓
组织纤溶酶原激活剂
血脑屏障
再灌注损伤
冲程(发动机)
医学
生物化学
中枢神经系统
内科学
外科
心脏病学
机械工程
工程类
作者
Hongbo Ye,Zhanhong Ma,Lei Liu,Tianci Zhang,Qiaoyi Han,Zehong Xiang,Yu Xia,Yanxiong Ke,Xinghua Guan,Qiang Shi,Fazly I. Ataullakhanov,Mikhail A. Panteleev
出处
期刊:ChemMedChem
[Wiley]
日期:2022-11-07
卷期号:17 (24)
被引量:1
标识
DOI:10.1002/cmdc.202200317
摘要
Ischemic stroke is caused by cerebrovascular stenosis or occlusion. Excessive reactive oxygen species (ROS) are the focus-triggering factor of irreversible injury in ischemic regions, which result in harmful cascading effects to brain tissue, such as inflammation and microthrombus formation. In the present work, we designed nanodelivery systems (NDSs) based on MnO2 loaded with Ginkgolide B (GB) for restoring the intracerebral microenvironment in ischemic stroke, such as ROS scavenging, O2 elevation, thrombus inhibition and damage repair. GB can activate the endogenous antioxidant defense of cells by enhancing the nuclear factor-E2-related factor 2 (Nrf2) signalling pathway, thus protecting brain tissue from oxidative damage. However, the blood-brain barrier (BBB) is also a therapeutic obstacle for the delivery of these agents to ischemic regions. MnO2 nanoparticles have an inherent BBB penetration effect, which enhances the delivery of therapeutic agents within brain tissue. MnO2 , with mimicking enzymatic activity, can catalyze the decomposition of overproduced H2 O2 in the ischemic microenvironment to O2 , meanwhile releasing platelet-antagonizing GB molecules, thus alleviating cerebral hypoxia, oxidative stress damage, and microthrombus generation. This study may provide a promising therapeutic route for regulating the microenvironment of ischemic stroke through a combined function of ROS scavenging, microthrombus inhibition, and BBB penetration.
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