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  • Title: Electroacupuncture attenuates cerebral ischemia/reperfusion injury by regulating oxidative stress, neuronal death and neuroinflammation via stimulation of PPAR-γ.
    Author: Cheng N, Cheng X, Tan F, Liang Y, Xu L, Wang J, Tan J.
    Journal: Acupunct Med; 2024 Jun; 42(3):133-145. PubMed ID: 38351622.
    Abstract:
    BACKGROUND: Oxidative stress and inflammatory responses play essential roles in cerebral ischemia/reperfusion (I/R) injury. Electroacupuncture (EA) is widely used as a rehabilitation method for stroke in China; however, the underlying mechanism of action remains unclear. Peroxisome proliferator-activated receptor gamma (PPAR-γ) has been reported to impact anti-inflammatory and anti-oxidative effects. OBJECTIVE: This study investigated the role of PPAR-γ in EA-mediated effects and aimed to illuminate its possible mechanisms in cerebral I/R. METHODS: In this study, male Sprague-Dawley (SD) rats with middle cerebral artery occlusion/reperfusion (MCAO/R) injury were treated with EA at LI11 and ST36 for 30 min daily after MCAO/R for seven consecutive days. The neuroprotective effects of EA were measured by neurobehavioral evaluation, triphenyltetrazolium chloride staining, hematoxylin-eosin staining and transmission electron microscopy. Oxidative stress, inflammatory factors, neural apoptosis and microglial activation were examined by enzyme-linked immunosorbent assay, immunofluorescence and reverse transcriptase polymerase chain reaction. Western blotting was used to assess PPAR-γ-mediated signaling. RESULTS: We found that EA significantly alleviated cerebral I/R-induced infarct volume, decreased neurological scores and inhibited I/R-induced oxidative stress, inflammatory responses and microglial activation. EA also increased PPAR-γ protein expression. Furthermore, the protective effects of EA were reversed by injection of the PPAR-γ antagonist T0070907. CONCLUSION: EA attenuates cerebral I/R injury by regulating oxidative stress, neuronal death and neuroinflammation via stimulation of PPAR-γ.
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