中国神经再生研究(英文版) ›› 2013, Vol. 8 ›› Issue (25): 2327-2335.doi: 10.3969/j.issn.1673-5374.2013.25.003

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

丹参多酚酸盐干预脑缺血再灌注大鼠热休克蛋白的表达

  

  • 收稿日期:2013-06-08 修回日期:2013-07-25 出版日期:2013-09-05 发布日期:2013-09-05

Salvianolate increases heat shock protein expression in a cerebral ischemia-reperfusion injury model

Jinnan Zhang, Wei Lu, Qiang Lei, Xi Tao, Hong You, Pinghui Xie   

  1. Department of Neurology, Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, China
  • Received:2013-06-08 Revised:2013-07-25 Online:2013-09-05 Published:2013-09-05
  • Contact: Wei Lu, Ph.D., Associate professor, Department of Neurology, Second Xiangya Hospital, Central South University, Changsha 410011, Hunan Province, China, luwei03380338@gmail.com
  • About author:Jinnan Zhang, Studying for doctorate.

摘要:

实验采用线栓法制备大鼠脑缺血再灌注损伤模型,并于再灌注后0,24,48 h向大鼠腹腔注射主要成分为丹酚酸B的丹参多酚酸盐18 mg/kg,观察其神经保护作用。再灌注后72 h,神经功能缺损评分结果显示应用丹参多酚酸盐干预的大鼠神经功能显著改善。取大鼠缺血脑组织检测发现,丹参多酚酸盐干预的模型大鼠脑梗死体积明显减小,脑组织损伤程度明显减轻,凋亡细胞明显减少。进一步对缺血脑组织热休克蛋白22和蛋白激酶B的表达进行检测发现,模型组和丹参多酚酸盐组缺血脑组织热休克蛋白22和磷酸化蛋白激酶B表达明显增高,以丹参多酚酸盐组增高更明显,而蛋白激酶B表达在各组间差异无显著性意义。结果提示丹参多酚酸盐可通过提高缺血脑组织热休克蛋白22和磷酸化蛋白激酶B的表达发挥对脑缺血再灌注损伤的保护作用。

关键词: 神经再生, 中医药, 脑损伤, 丹酚酸B, 丹参多酚酸盐, 热休克蛋白22, 蛋白激酶B, 缺血再灌注脑损伤, 凋亡, 神经保护

Abstract:

Stroke remains a worldwide health problem. Salvianolate exerts a protective effect in various mi-crocirculatory disturbance-related diseases, but studies of the mechanisms underlying its protective action have mainly focused on the myocardium, whereas little research has been carried out in brain tissue following ischemia-reperfusion. We assessed the neuroprotective effects of salvianolate in a rat model of cerebral ischemia-reperfusion injury induced using the suture method. At onset and 24 and 48 hours after reperfusion, rats were intraperitoneally injected with salvianolate (18 mg/kg) or saline. Neurological deficit scores at 72 hours showed that the neurological functions of rats that had received salvianolate were significantly better than those of the rats that had received saline. 2,3,5-Triphenyltetrazolium chloride was used to stain cerebral tissue to determine the extent of the infarct area. A significantly smaller infarct area and a significantly lower number of apoptotic cells were observed after treatment with salvianolate compared with the saline treatment. Expression of heat shock protein 22 and phosphorylated protein kinase B in ischemic brain tissue was significantly greater in rats treated with salvianolate compared with rats treated with saline. Our findings suggest that salvianolate provides neuroprotective effects against cerebral ischemia-reperfusion injury by upregulating heat shock protein 22 and phosphorylated protein kinase B expression.

Key words: neural regeneration, traditional Chinese medicine, brain injury, salvianolic acid B, salvianolate, heat shock protein 22, protein kinase B, cerebral ischemia-reperfusion injury, apoptosis, neuroprotection, neuroregeneration