肉苁蓉总苷对脑缺血再灌注损伤模型大鼠的保护作用及机制
作者:
作者单位:

1.包头医学院第一附属医院神经内科,内蒙古 包头 014010;2.包头医学院人体解剖学教研室,内蒙古 包头 014040

中图分类号:

R-33


Protective effect and mechanism of glycosides of cistanche in a rat cerebral ischemia reperfusion injury model
Author:
Affiliation:

1. Department of Neurology, the First Affiliated Hospital, Baotou Medical College, Baotou 014010, China.2. Department of Human Anatomy, Baotou Medical College, Baotou 014040

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    摘要:

    目的 研究肉苁蓉总苷(glycosides of cistanches,GCs)保护脑缺血再灌注损伤模型大鼠的作用及机制。 方法 将48只雄性Wistar大鼠分为假手术组(Sham)组、模型组(Model)组、肉苁蓉总苷(GCs)组和尼莫地平(Nimodipine,Nim)组。采用大脑中动脉闭塞法制备大鼠脑缺血再灌注损伤(cerebral ischemia reperfusion injury, CIRI)模型。通过Zea-Longa神经功能评分评估各组大鼠神经功能缺损情况,贴纸去除实验、平衡杆实验、旷场实验评估各组大鼠感觉和运动能力,2,3,5-三苯基氯化四氮唑(2,3,5-triphenyltetrazolium chloride,TTC)染色检测脑梗死面积,尼氏染色观察神经细胞形态,TUNEL染色检测神经细胞凋亡情况,免疫组织化学染色以及蛋白免疫印迹实验探究各组大鼠凋亡相关蛋白、B细胞淋巴瘤-2(B-cell lymphoma-2,Bcl-2)、Bcl-2相关X蛋白(Bcl-2 associated X, Bax)、半胱氨酸天冬氨酸蛋白酶-3(cysteine aspartic protease-3,Caspase-3)表达的变化。 结果 与Sham组比较,脑缺血再灌注后大鼠神经功能缺损评分显著升高(P<0.05),撕掉贴纸和通过平衡杆时间显著增加(P<0.05),运动能力减退,梗死面积增大,神经元减少,凋亡细胞增多,Bax、Caspase-3表达升高(P<0.05),Bcl-2/Bax表达降低(P<0.05)。与Model组比较,GCs可改善脑缺血再灌注模型大鼠行为学表现,减小梗死面积,抑制细胞凋亡,下调Bax、Caspase-3的表达(P<0.05),上调Bcl-2/Bax的表达(P<0.05)。 结论 GCs对脑缺血再灌注损伤具有神经保护作用,其可能是通过调控凋亡相关因子Bax、Bcl-2、Caspase-3的表达进而抑制细胞凋亡发挥作用。

    Abstract:

    Objective To investigate the neuroprotective effect and mechanism of glycosides of Cistanche (GCs) on cerebral ischemia reperfusion injury (CIRI) in rats. Methods Forty-eight male Wistar rats were divided randomly into Sham, Model, GCs, and Nim groups. A rat model of focal CIRI was established by middle cerebral artery occlusion. Neurological function was scored using the Zea-Longa scoring method. The sensory and motor abilities of rats in each group were evaluated by sticker removal, balance beam, and open field tests. The area of cerebral infarction was detected by 2,3,5-triphenyltetrazolium chloride(TTC) staining, Nissl staining was used to observe the morphology of nerve cells, and terminal deoxynucleotidyl transferase dUTP nick end labeling was used to detect apoptosis of nerve cells. Expression levels of the apoptosis-related proteins B-cell lymphoma-2 (Bcl-2), Bcl-2 associated X (Bax), and cysteine aspartic protease-3 (Caspase-3) were detected by immunohistochemical staining and Western blot. Results Compared with the Sham group, the neurological deficit score was significantly increased (P<0.05) and the times to remove stickers and passing the balance beam were significantly increased (P<0.05), motor ability was decreased, infarct size was increased, the number of neurons was decreased, and the number of apoptotic cells was increased after CIRI. Bax and Caspase-3 expression were significantly increased (P<0.05) and Bcl-2/Bax was significantly decreased (P<0.05). Compared with the Model group, GCs improved the behavioral performance of CIRI model rats, reduced the infarct size, inhibited cell apoptosis, downregulated the expression of Bax and Caspase-3 (P<0.05), and up-regulated the expression of Bcl-2/Bax (P<0.05). Conclusions GCs have a neuroprotective effect on CIRI, and may play a role in inhibiting cell apoptosis by regulating the expression of the apoptosis-related factors Bax, Bcl-2, and Caspase-3.

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王 璐,郭 霞,马尚佳,雍 雯,于文龙,吴丽娥,贾建新.肉苁蓉总苷对脑缺血再灌注损伤模型大鼠的保护作用及机制[J].中国比较医学杂志,2024,34(12):19~28.

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  • 收稿日期:2024-07-15
  • 在线发布日期: 2025-03-05
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