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
To repair the blood–brain barrier(BBB)after traumatic brain injury(TBI)remains a multidisciplinary challenge.No first-line drugs are available.Here,we reported a novel and non-toxic functional negative-charged carbon...To repair the blood–brain barrier(BBB)after traumatic brain injury(TBI)remains a multidisciplinary challenge.No first-line drugs are available.Here,we reported a novel and non-toxic functional negative-charged carbon dots(CDs)generated from green Semen pruni persicae and Carthamus tinctorius L.(TH-CDs)through a hydrothermal synthesis without any organic solvent.The surface of TH-CDs retained part functional groups of active pharmacophores from both drugs.TH-CDs could improve the neurological function,brain edema,neuronal damage,and the BBB permeability by tail vein injection of mice models without systemic toxicity.Furthermore,higher expression of tight junction proteins claudin 5 and ZO-1 was observed after TH-CDs administration,which may be due to the electrostatic interaction between TH-CDs and claudin 5.Our study highlights an inexpensive,green,non-toxic,and intravenous functional TH-CD,which represents a potential TBI treatment strategy.展开更多
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。
基金supported by the National Natural Science Foundation of China(No.81973665)the Science and Technology Innovation Program of Hunan Province(No.2021RC3030)+1 种基金the Fundamental Research Funds for the Central Universities of Central South University(No.2021zzts1028)the InnovationDriven Project of Central South University(No.2020CX047).
文摘To repair the blood–brain barrier(BBB)after traumatic brain injury(TBI)remains a multidisciplinary challenge.No first-line drugs are available.Here,we reported a novel and non-toxic functional negative-charged carbon dots(CDs)generated from green Semen pruni persicae and Carthamus tinctorius L.(TH-CDs)through a hydrothermal synthesis without any organic solvent.The surface of TH-CDs retained part functional groups of active pharmacophores from both drugs.TH-CDs could improve the neurological function,brain edema,neuronal damage,and the BBB permeability by tail vein injection of mice models without systemic toxicity.Furthermore,higher expression of tight junction proteins claudin 5 and ZO-1 was observed after TH-CDs administration,which may be due to the electrostatic interaction between TH-CDs and claudin 5.Our study highlights an inexpensive,green,non-toxic,and intravenous functional TH-CD,which represents a potential TBI treatment strategy.
