Houshiheisan,a classic prescription in traditional Chinese medicine,contains Flos Chrysanthemi,Radix Saposhnikoviae,Ramulus Cinnamomi,Rhizoma Chuanxiong,Radix et Rhizoma Asari,Radix Platycodonis,Rhizoma Atractylodis m...Houshiheisan,a classic prescription in traditional Chinese medicine,contains Flos Chrysanthemi,Radix Saposhnikoviae,Ramulus Cinnamomi,Rhizoma Chuanxiong,Radix et Rhizoma Asari,Radix Platycodonis,Rhizoma Atractylodis macrocephalae,Poria,Rhizoma Zingiberis,Radix Angelicae sinensis,Radix et Rhizoma Ginseng,Radix Scutellariae and Concha Ostreae.According to traditional Chinese medicine theory,Flos Chrysanthemi,Radix Saposhnikoviae,Ramulus Cinnamomi,Rhizoma Chuanxiong,Radix et Rhizoma Asari and Radix Platycodonis are wind-dispelling drugs;Rhizoma Atractylodis macrocephalae,Poria,Rhizoma Zingiberis,Radix Angelicae sinensis and Radix et Rhizoma Ginseng are deficiency-nourishing drugs.A large number of randomized controlled trials have shown that Houshiheisan is effective in treating stroke,but its mechanism of action is unknown.Axonal remodeling is an important mechanism in neural protection and regeneration.Therefore,this study explored the effect and mechanism of action of Houshiheisan on the repair of axons after cerebral ischemia.Rat models of focal cerebral ischemia were established by ligating the right middle cerebral artery.At 6 hours after model establishment,rats were intragastrically administered 10.5 g/kg Houshiheisan or 7.7 g/kg wind-dispelling drug or 2.59 g/kg deficiency-nourishing drug.These medicines were intragastrically administered as above every 24 hours for 7 consecutive days.Houshiheisan,and its wind-dispelling and deficiency-nourishing components reduced the neurological deficit score and ameliorated axon and neuron lesions after cerebral ischemia.Furthermore,Houshiheisan,and its wind-dispelling and deficiency-nourishing components decreased the expression of proteins that inhibit axonal remodeling：amyloid precursor protein,neurite outgrowth inhibitor protein A（Nogo-A）,Rho family small GTPase A（Rho A） and Rho-associated kinase 2（Rock2）,and increased the expression of growth associated protein-43,microtubule-associated protein-2,netrin-1,Ras-related C3 botulinum toxin substrate 1（R展开更多
目的观察虾青素对脑出血大鼠的神经保护作用,并探讨其作用机制。方法将168只SD大鼠随机分为假手术组、模型对照组、低剂量虾青素组、高剂量虾青素组各42只。模型对照组和低、高剂量虾青素组通过尾状核注入尾静脉自体血建立脑出血模型,...目的观察虾青素对脑出血大鼠的神经保护作用,并探讨其作用机制。方法将168只SD大鼠随机分为假手术组、模型对照组、低剂量虾青素组、高剂量虾青素组各42只。模型对照组和低、高剂量虾青素组通过尾状核注入尾静脉自体血建立脑出血模型,假手术组注射等量生理盐水。将每组根据灌胃时间不同分为1、3、7 d 3个亚组各14只,低剂量虾青素组、高剂量虾青素组分别给予虾青素20、40 mg/(kg·d)灌胃,假手术组、模型对照组分别给予等体积花生油溶剂灌胃。于灌胃1、3、7 d行神经功能评分后,采用ELISA法检测血清炎症因子TNF-α、IL-1β水平;用干湿重法测定脑组织含水量,伊文思蓝(EB)染色法检测血脑屏障通透性,免疫组化法检测脑组织ROCK2、Claudin5蛋白表达。结果与假手术组比较,模型对照组各时间点神经功能评分降低,血清TNF-α、IL-1β水平升高,脑组织含水量、EB含量增加,ROCK2蛋白表达增加,Claudin5蛋白表达降低(P均<0.05);与模型对照组比较,低剂量虾青素组、高剂量虾青素组大鼠各时间点神经功能评分均升高,血清TNF-α、IL-1β水平降低,脑组织含水量、EB含量降低,ROCK2蛋白表达降低,Claudin5蛋白表达增加(P均<0.05),高剂量虾青素组上述指标改善程度较低剂量组更为明显(P均<0.05)。结论虾青素可降低脑出血大鼠的血清炎症因子水平,改善血脑屏障通透性,减轻脑水肿,具有一定的神经保护作用,这可能通过抑制ROCK2表达、上调Claudin5蛋白表达来实现的。展开更多
基金supported by the National Natural Science Foundation of China,No.81373526
文摘Houshiheisan,a classic prescription in traditional Chinese medicine,contains Flos Chrysanthemi,Radix Saposhnikoviae,Ramulus Cinnamomi,Rhizoma Chuanxiong,Radix et Rhizoma Asari,Radix Platycodonis,Rhizoma Atractylodis macrocephalae,Poria,Rhizoma Zingiberis,Radix Angelicae sinensis,Radix et Rhizoma Ginseng,Radix Scutellariae and Concha Ostreae.According to traditional Chinese medicine theory,Flos Chrysanthemi,Radix Saposhnikoviae,Ramulus Cinnamomi,Rhizoma Chuanxiong,Radix et Rhizoma Asari and Radix Platycodonis are wind-dispelling drugs;Rhizoma Atractylodis macrocephalae,Poria,Rhizoma Zingiberis,Radix Angelicae sinensis and Radix et Rhizoma Ginseng are deficiency-nourishing drugs.A large number of randomized controlled trials have shown that Houshiheisan is effective in treating stroke,but its mechanism of action is unknown.Axonal remodeling is an important mechanism in neural protection and regeneration.Therefore,this study explored the effect and mechanism of action of Houshiheisan on the repair of axons after cerebral ischemia.Rat models of focal cerebral ischemia were established by ligating the right middle cerebral artery.At 6 hours after model establishment,rats were intragastrically administered 10.5 g/kg Houshiheisan or 7.7 g/kg wind-dispelling drug or 2.59 g/kg deficiency-nourishing drug.These medicines were intragastrically administered as above every 24 hours for 7 consecutive days.Houshiheisan,and its wind-dispelling and deficiency-nourishing components reduced the neurological deficit score and ameliorated axon and neuron lesions after cerebral ischemia.Furthermore,Houshiheisan,and its wind-dispelling and deficiency-nourishing components decreased the expression of proteins that inhibit axonal remodeling：amyloid precursor protein,neurite outgrowth inhibitor protein A（Nogo-A）,Rho family small GTPase A（Rho A） and Rho-associated kinase 2（Rock2）,and increased the expression of growth associated protein-43,microtubule-associated protein-2,netrin-1,Ras-related C3 botulinum toxin substrate 1（R
文摘目的观察虾青素对脑出血大鼠的神经保护作用,并探讨其作用机制。方法将168只SD大鼠随机分为假手术组、模型对照组、低剂量虾青素组、高剂量虾青素组各42只。模型对照组和低、高剂量虾青素组通过尾状核注入尾静脉自体血建立脑出血模型,假手术组注射等量生理盐水。将每组根据灌胃时间不同分为1、3、7 d 3个亚组各14只,低剂量虾青素组、高剂量虾青素组分别给予虾青素20、40 mg/(kg·d)灌胃,假手术组、模型对照组分别给予等体积花生油溶剂灌胃。于灌胃1、3、7 d行神经功能评分后,采用ELISA法检测血清炎症因子TNF-α、IL-1β水平;用干湿重法测定脑组织含水量,伊文思蓝(EB)染色法检测血脑屏障通透性,免疫组化法检测脑组织ROCK2、Claudin5蛋白表达。结果与假手术组比较,模型对照组各时间点神经功能评分降低,血清TNF-α、IL-1β水平升高,脑组织含水量、EB含量增加,ROCK2蛋白表达增加,Claudin5蛋白表达降低(P均<0.05);与模型对照组比较,低剂量虾青素组、高剂量虾青素组大鼠各时间点神经功能评分均升高,血清TNF-α、IL-1β水平降低,脑组织含水量、EB含量降低,ROCK2蛋白表达降低,Claudin5蛋白表达增加(P均<0.05),高剂量虾青素组上述指标改善程度较低剂量组更为明显(P均<0.05)。结论虾青素可降低脑出血大鼠的血清炎症因子水平,改善血脑屏障通透性,减轻脑水肿,具有一定的神经保护作用,这可能通过抑制ROCK2表达、上调Claudin5蛋白表达来实现的。
