Neuroprotective Effect of Alpha-asarone on the Rats Model of Cerebral Ischemia-Reperfusion Stroke via Ameliorating Glial Activation and Autophagy

Neuroscience ◽  
2021 ◽  
Author(s):  
Kun Zhang ◽  
Qi Liu ◽  
Lijun Luo ◽  
Xinqian Feng ◽  
Qinrui Hu ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Neuroprotective Effect ◽  
Ischemia Reperfusion ◽  
Glial Activation ◽  
Cerebral Ischemia Reperfusion

Syringin protects against cerebral ischemia/reperfusion injury via inhibiting neuroinflammation and TLR4 signaling

Perfusion ◽  
2021 ◽  
pp. 026765912110070
Author(s):  
Yan Liu ◽  
Xuyao Zhu ◽  
Xiuxia Tong ◽  
Ziqiang Tan
Keyword(s):  
Cerebral Ischemia ◽  
Reperfusion Injury ◽  
Learning And Memory ◽  
Ischemia Reperfusion Injury ◽  
Neuroprotective Effect ◽  
Ischemia Reperfusion ◽  
Cerebral Damage ◽  
Memory Ability ◽  
Cerebral Ischemia Reperfusion ◽  
Cerebral Ischemia Reperfusion Injury

Introduction: Cerebral ischemia/reperfusion injury (CI/R) is associated with high mortality and remains a large challenge in the clinic. Syringin is a bioactive compound with anti-inflammation, antioxidant, as well as neuroprotective effects. Nevertheless, whether syringin could protect against CI/R injury and its potential mechanism was still unclear. Methods: Rats were randomly divided into five groups: sham group, syringin group, CI/R group, CI/R + syringin group, and CI/R + syringin + LPS (TLR4 agonist) group. The CI/R injury rat model was established by the middle cerebral artery occlusion (MCAO). The learning and memory ability of rats was estimated by the Morris water maze test. Modified neurological severity score test (mNSS) and infarct volume were detected to assess the neuroprotective effect of syringin. ELISA and RT-qPCR were used to analyze the concentration of proinflammation cytokines and the expression of TLR4. Results: CI/R injury induced increased mNSS scores and decreased learning and memory ability of rats. Syringin could significantly protect against CI/R injury as it decreased the cerebral damage and improved the cognitive ability of CI/R rats. Moreover, syringin also reduced neuroinflammation of CI/R injury rats. Additionally, TLR4 was significantly upregulated in CI/R injury rats, which was suppressed by syringin. The activation of TLR4 reversed the neuroprotective effect of syringin in CI/R rats. Conclusion: Syringin decreased the inflammation reaction and cerebral damage in CI/R injury rats. The neuroprotective effect of syringin may be correlated with the inhibition of TLR4.

Neuroprotective Effects of Alisol A 24-acetate on Cerebral Ischemia-reperfusion Injury by Regulating PI3K/AKT Pathway

2021 ◽  
Author(s):  
Taotao Lu ◽  
Huihong Li ◽  
Yangjie Zhou ◽  
Wei Wei ◽  
Linlin Ding ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Ischemia Reperfusion Injury ◽  
Neuroprotective Effect ◽  
Ischemia Reperfusion ◽  
Brain Regions ◽  
Global Cerebral Ischemia ◽  
Akt Pathway ◽  
Object Recognition Test ◽  
Neuroprotective Effects ◽  
Cerebral Ischemia Reperfusion

Abstract BackgroundNeuroinflammation and apoptosis are involved in the pathogenesis of ischemic stroke. Alisol A 24-acetate (24A) has a strong inhibitory effect on inflammation and cell apoptosis. The neuroprotective effect of 24A in the global cerebral ischemia/ reperfusion (GCI/R) is still unclear. Methods GCI/R mice was used to investigated the neuroprotective effect of 24A. Modified neurological deficit scores, Morris Water Maze and object recognition test were used to evaluate behaviors. The metabolism in brain regions was detected by MRS. The changes of microglia, astrocytes and neurons was detected. The inflammation and apoptosis were measured.Results The results showed that 24A improved behavioral dysfunction and brain metabolism, alleviate neuroinflammation and apoptosis, inhibited microglia and astrocytes activation, which is associated with the activation of PI3K/AKT pathway. ConclusionsTaken together, our study demonstrated that 24A could alleviate GCI/R injury through anti-neuroinflammation and anti-apoptosis via regulating the PI3K/AKT pathway.

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