J4 ›› 2012, Vol. 38 ›› Issue (5): 957-960.

• 基础研究 • 上一篇    下一篇

日本刺沙蚕纤溶酶对局灶性脑缺血大鼠的神经保护作用

王少华1,2|洪新雨3|薄其青1|葛鑫1|崔佳乐4   

  1. 1. 吉林大学白求恩医学院生物化学与分子生物学教研室|吉林 长春 130021;2. 吉林大学第一医院转化医学研究院|吉林 长春 130061;3. 吉林大学第一医院神经外科|吉林 长春 130021;4. 吉林大学白求恩医学院组织学与胚胎学教研室|吉林 长春 130021
  • 收稿日期:2012-04-05 出版日期:2012-09-28 发布日期:2012-09-28
  • 通讯作者: 崔佳乐(Tel:0431-85619477,E-mail:cuijiayue@jlu.edu.cn) E-mail:cuijiayue@jlu.edu.cn
  • 作者简介:王少华(1984-)|男|陕西省宝鸡市人|医师|理学博士|主要从事生化药物方面的研究。
  • 基金资助:

    吉林省中医药管理局专项资助课题(2010-094)

Neuroprotective effect of Neanthes japonica (Izuka) fibrinolytic enzyme on rat models of focal cerebral ischemia

WANG Shao-hua1,2, HONG Xin-yu3, BO Qi-qing1, GE Xin1, CUI Jia-yue4   

  1. 1. Department of Biochemistry and Molecular Biology, Norman Bethune College of Medicine, Jilin University,Changchun 130021, China|2. Research Institute of Translational Medicine, First Hospital, Jilin University, Changchun 130061, China|3. Department of Neurosurgery, First Hospital, Jilin University, Changchun 130021,China|4. Department of Histology and Embryology,Norman Bethune College of Medicine, Jilin University, Changchun 130021, China
  • Received:2012-04-05 Online:2012-09-28 Published:2012-09-28

摘要:

[摘 要] 目的:观察日本刺沙蚕纤溶酶(NJF)对大鼠局灶性脑缺血的神经保护作用,并探讨其作用机制。方法:60只Wistar大鼠随机分为假手术组、模型组、NJF组(0.25、0.50和1.00 mg/kg)和尿激酶组(UK, 15 000 U/kg),每组10只。采用线栓法制备大鼠大脑中动脉阻塞(MCAO)模型。术后24 h,对大鼠进行神经功能损害评分,TTC染色计算脑梗死范围,湿重干重法测量脑含水量,化学比色法检测大鼠海马组织中丙二醛(MDA)水平及超氧化物歧化酶(SOD)活性。结果:与模型组比较,NJF各给药组大鼠神经功能损害评分明显降低(P<0.05);脑梗死范围显著降低(P<0.001),脑含水量下降(P<0.05或P<0.01),且脑缺血海马组织中MDA水平降低(P<0.001),同时SOD活性升高(P<0.05 或P<0.01),具有明显的剂量依赖性。NJF0.50 mg/kg组大鼠脑梗死范围和脑含水量变化与UK 15 000 U?kg-1组比较差异无统计学意义。结论: NJF对大鼠缺血再灌注损伤大脑有潜在的神经保护作用,其机制可能与抑制脂质过氧化及提高内源性抗氧化酶活性有关。

关键词: 日本刺沙蚕;纤溶酶;大脑中动脉;神经保护;局灶性脑缺血;大鼠, Wistar

Abstract:

Abstract:Objective  To observe the neuroprotective effect of Neanthes japonica (Izuka) fibrinolytic enzyme (NJF) on rat models of focal cerebral ischemia and to explore its mechanism.Methods  60 Wistar rats were randomly divided into sham operated group, model group, NJF treatment groups (0.25, 0.50 and 1.00 mg/kg, respectively) and Urokinase group (UK, 15 000 U/kg ).The rat model of middle cerebral artery occlusion (MCAO) was produced by intraluminal suture method. The neurological deficits score was measured 24 h after the operation, the cerebral infarction was detected by TTC staining, the brain water content was determined by wet and dry weights, and the malondialdehyde (MDA) levels and superoxide dismutase (SOD) activities were measured by chemical colorimetric assay.Results  Compared with model group, the neurological deficits scores of rats in all NJF groups were significantly decreased (P<0.05), the cerebral infarction area was significantly reduced (P<0.001), the brain water contents were decreased (P<0.05 or P<0.01), the MDA levels were decreased (P<0.001) and the SOD activities were increased (P<0.05 or P<0.01) significantly in hippocampus of the cerebral ischemia rats.There were no significant differences in the cerebral infarction area and the brain water content of rats between   0.50 mg/kg  NJF group and   15 000 U/kg UK group.Conclusion  NJF posseses neuroprotection for MCAO and reperfusion model rat.The neuroprotection of NJF may be related to inhibiting lipid peroxidation and increasing the activities of endogenous antioxidant defense enzymes.

Key words: Neanthes japonica (Izuka), fibrinolytic enzyme, middle cerebral artery, neuroprotection, focal cerebral ischemia, rats,Wistar

中图分类号: 

  • R743