查看更多>>摘要：目的 探究银杏内酯B对小鼠缺血性脑卒中后神经功能恢复及Wnt/β-连环蛋白（β-catenin）通路的影响。 方法 选取C57/BL6系实验小鼠55只，留取10只作为假手术组，其余45只小鼠构建缺血性脑卒中模型，最终有40只完成建模，将其随机分为模型组、短程给药（GB1w）组、长程给药（GB2w）组、长程给药＋拮抗剂（GB2w＋PRI-724）组，每组各10只。模型组大脑中动脉栓塞（MCAO）术后无药物干预；GB1w组MCAO术后1周内鼻饲银杏内酯B（10 mg/kg）0.1 ml；GB2w组MCAO术后2周内鼻饲银杏内酯B（10 mg/kg）0.1 ml；GB2w＋PRI-724组MCAO术后2周内鼻饲银杏内酯B（10 mg/kg）0.1 ml，且第8～14天银杏内酯B给药前3 h，给予选择性拮抗剂PRI-724 20 mg/d。比较各组的神经功能评分、转棒上行走实验评分、转化生长因子-β1（TGF-β1）、成纤维细胞生长因子4（FGF4）、肿瘤坏死因子-α（TNF-α）、白细胞介素-6（IL-6）、丙二醛（MDA）、谷胱甘肽过氧化物酶（GSH-Px）、超氧化物歧化酶（SOD）、Wnt、β-catenin和糖原合成酶激酶-3β（GSK-3β）表达的变化情况。 结果 与假手术组相比，模型组、GB1w组、GB2w组和GB2w＋PRI-724组的神经功能评分、转棒上行走实验评分、FGF4、TNF-α、IL-6和MDA水平及GSK-3β表达上升，TGF-β1、GSH-Px和SOD水平及Wnt、β-catenin表达下降，差异均有统计学意义（均P<0.001）；与模型组相比，GB1w组、GB2w组和GB2w＋PRI-724组的TGF-β1、GSH-Px和SOD水平及Wnt、β-catenin表达上升，神经功能评分、转棒上行走实验评分、FGF4、TNF-α、IL-6和MDA水平及GSK-3β表达下降，差异均有统计学意义（均P<0.001）；与GB1w组相比，GB2w组和GB2w＋PRI-724组的TGF-β1、GSH-Px和SOD水平及Wnt、β-catenin表达上升，神经功能评分、转棒上行走实验评分、FGF4、TNF-α、IL-6和MDA水平及GSK-3β表达下降，差异均有统计学意义（均P<0.001）；与GB2w组相比，GB2w＋PRI-724组的神经功能评分、转棒上行走实验评分、FGF4、TNF-α、IL-6和MDA水平及GSK-3β表达上升，TGF-β1、GSH-Px和SOD水平及Wnt、β-catenin表达下降，差异均有统计学意义（均P<0.001）。 结论 银杏内酯B可有效改善缺血性脑卒中小鼠神经功能，且可能与Wnt/β-catenin通路相关。 Objective To investigate the effects of ginkgolide B on neurological function recovery and the Wnt/β-catenin pathway after ischemic stroke in mice. Methods Fifty-five C57/BL6 mice were selected, of which 10 mice were kept as the sham group and the remaining 45 mice were constructed as the ischemic stroke model. There were 40 mice who finally completed the modeling, and then they were randomly divided into the blank control group (GB0w), short-course administration group (GB1w), long-term administration group (GB2w), and long-term administration+antagonist group (GB2w+PRI-724), with 10 mice in each group. There was no drug intervention after MCAO in GB0w. The mice in GB1w were given ginkgolide B (10 mg/kg) 0.1 ml within 1 week after MCAO in GB2w were given ginkgolide B (10 mg/kg) 0.1 ml within 2 weeks after MCAO and in GB2w+PRI-724 were nasally fed ginkgolide B (10 mg/kg) 0.1 ml within 2 weeks after MCAO and selective antagonist PRI-724 was given 3 h before administration of ginkgolide B on days 8 to 14. Neurological function scores, walking on rotor bar test scores, expression of transforming growth factor-β1 (TGF-β1), fibroblast growth factor 4 (FGF4), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), malondialdehyde (MDA), glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), Wnt, β-catenin, and glycogen synthase kinase-3β (GSK-3β) were compared among the groups. Results Compared with the sham group, the expressions of MDA, TNF-α, IL-6, FGF4, and GSK-3β in GB0w, GB1w, GB2w, and GB2w+ PRI-724 were increased, and the expressions of GSH-Px, SOD, TGF-β1, β-catenin, and Wnt were decreased (allP < 0.001). Compared with GB0w, the expressions of SOD, GSH-Px, TGF-β1, Wnt, and β-catenin were increased in GB1w, GB2w, and GB2w+PRI-724, and the expressions of MDA, TNF-α, IL-6, FGF4, and GSK-3β were decreased (all P < 0.001). Compared with GB1w, the expressions of GSH-Px, SOD, TGF-β 1, Wnt, and β-catenin were increased in GB2w and GB2w+PRI-724, and the expressions of IL-6, TNF-α, MDA, FGF4, and GSK-3β were decreased (all P < 0.001). Compared with GB2w, the neural function score, walking on the stick test score, and expressions of IL-6, TNF-α, FGF4, MDA, and GSK-3β were increased in GB2w+PRI-724, while the expressions of GSH-Px, TGF-β1, SOD, Wnt, and β-catenin were decreased (all P < 0.001). Conclusions Ginkgolide B can effectively improve the neurological function of ischemic stroke mice and may be related to the Wnt/β-catenin pathway.
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