汉黄芩素干预糖尿病脑梗死模型大鼠的神经损伤

被引:3
作者
王欢欢 [1 ]
梁盼盼 [1 ]
杨金水 [1 ]
贾淑贤 [2 ]
赵佳佳 [1 ]
陈媛媛 [1 ]
薛茜 [1 ]
宋爱霞 [1 ]
机构
[1] 河北北方学院附属第一医院神经内科
[2] 河北北方学院附属第一医院老年病科
关键词
糖尿病; 脑梗死; 神经损伤; 汉黄芩素; Ras同源基因家族成员A; Rho相关卷曲螺旋蛋白激酶;
D O I
暂无
中图分类号
R285.5 [中药实验药理];
学科分类号
摘要
背景:汉黄芩素是黄芩根中提取的一种黄酮类化合物,既往研究表明汉黄芩素对脑缺血再灌注损伤有保护作用,还能降低糖尿病小鼠的血糖及其并发症,但其在糖尿病脑梗死中的作用及机制还不清楚。目的:探究汉黄芩素对糖尿病脑梗死大鼠神经损伤的影响,并探究其作用机制。方法:将SD大鼠随机分为6组:对照组、模型组、汉黄芩素低、中、高剂量组和汉黄芩素高剂量+RhoA激活剂组,每组10只。除对照组外,其余组通过腹腔注射链脲佐菌素和大脑中动脉闭塞法构建糖尿病脑梗死大鼠模型,汉黄芩素低、中、高剂量组分别灌胃10,20,40 mg/kg汉黄芩素,汉黄芩素高剂量+RhoA激活剂组灌胃40 mg/kg汉黄芩素并腹腔注射10 mg/kg溶血磷脂酸,对照组和模型组给予等量生理盐水,1次/d,连续7 d。末次给药结束后,各组大鼠进行神经功能缺损评分,检测血糖水平,TTC染色检测脑梗死体积,苏木精-伊红染色观察脑组织病理变化,ELISA试剂盒检测脑组织中肿瘤坏死因子α、白细胞介素6和丙二醛、超氧化物歧化酶水平,Western blot检测脑组织中RhoA、ROCK2蛋白表达。结果与结论:(1)与对照组相比,模型组大鼠神经元结构严重受损,细胞坏死、变性;神经功能缺损评分、血糖水平、脑梗死体积升高(P <0.05);脑组织中肿瘤坏死因子α、白细胞介素6、丙二醛水平升高(P <0.05),超氧化物歧化酶水平下降(P <0.05);脑组织中RhoA、ROCK2蛋白表达升高(P <0.05);(2)与模型组相比,汉黄芩素低、中、高剂量组神经元损伤改善,细胞变性和坏死减少;神经功能缺损评分、血糖水平、脑梗死体积下降(P <0.05);脑组织中肿瘤坏死因子α、白细胞介素6、丙二醛水平下降(P <0.05),超氧化物歧化酶水平升高(P <0.05);脑组织中RhoA、ROCK2蛋白表达下降(P <0.05);(3)与汉黄芩素高剂量组相比,汉黄芩素高剂量+RhoA激活剂组明显抑制糖尿病脑梗死大鼠上述指标的改善(P <0.05)。结果表明:汉黄芩素能够改善糖尿病脑梗死大鼠血糖水平,减轻脑梗死和神经损伤,其作用机制可能与抑制RhoA/ROCK信号通路有关。
引用
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页码:2327 / 2333
页数:7
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