丹酚酸B对创伤后应激障碍模型大鼠认知功能和GSK-3β/β-Catenin信号通路的影响  

Impact of salvianolic acid B on cognitive function and GSK-3β/β-Catenin signaling pathway in rats with post-traumatic stress disorder

作　　者：杨阳 何巧玉 YANG Yang;HE Qiaoyu(Department of Basic Medicine,Henan Nursing Vocational College,Anyang 455000,China)

机构地区：[1]河南护理职业学院基础医学部,455000

出　　处：《天津医药》2024年第1期73-79,共7页Tianjin Medical Journal

基　　金：河南省高等学校重点科研项目(20B180004)。

摘　　要：目的 探讨丹酚酸B(Sal B)是否可通过调节糖原合成酶激酶-3β/β-连环蛋白(GSK-3β/β-Catenin)信号通路改善创伤后应激障碍(PTSD)模型大鼠认知功能。方法 60只大鼠随机分为正常组、PTSD组、Sal B低剂量组(10 mg/kg)、Sal B高剂量组(20 mg/kg)和GSK-3β抑制剂组(30 mg/kg CHIR-99021),每组12只。除正常组外,其余组大鼠采用单一延长应激法构建PTSD大鼠模型。旷场实验、Morris水迷宫实验评估大鼠认知功能;Nissl染色观察海马神经元病理学变化;TUNEL染色检测海马神经元凋亡;Western blot检测海马组织中裂解的胱天蛋白酶3(cleaved caspase-3)、B细胞淋巴瘤基因-2相关X蛋白(Bax)、原癌基因(c-Myc)、细胞周期蛋白D1(Cyclin D1)、总GSK-3β(tGSK-3β)、磷酸化GSK-3β(p-GSK-3β)、总β-Catenin(t-β-Catenin)、磷酸化β-Catenin(p-β-Catenin)蛋白表达。结果与PTSD组比较,Sal B低剂量组、Sal B高剂量组和GSK-3β抑制剂组大鼠爬行格数、站立次数、运动总距离、跨越原平台次数增多,逃避潜伏期、首次跨越原平台时间缩短,海马神经元凋亡率以及海马组织中Bax、cleaved caspase-3、t-GSK-3β、p-β-Catenin蛋白表达水平降低,Cyclin D1、c-Myc、p-GSK-3β、t-β-Catenin蛋白表达水平升高(P<0.05)。结论 Sal B能够减轻PTSD模型大鼠海马神经元凋亡、损伤并可改善其认知功能障碍,抑制GSK-3β/β-Catenin信号通路。Objective To investigate whether salvianolic acid B(Sal B)can improve the cognitive function in rats with post-traumatic stress disorder(PTSD)by regulating GSK-3β/β-Catenin signal pathway.Methods Sixty rats were randomly grouped into the normal group,the PTSD group,the Sal B low-dose group(10 mg/kg),the Sal B high-dose group(20 mg/kg)and the GSK-3βinhibitor group(30 mg/kg CHIR-99021),with 12 rats in each group.In addition to the normal group,rats in other groups were constructed PTSD rat models by using single prolonged stress(SPS)method.Open field test and Morris water maze test were applied to evaluate the cognitive function of rats.Nissl staining was applied to observe the pathological changes of hippocampal neurons.TUNEL staining was applied to detect the apoptosis of hippocampal neurons.Western blot assay was applied to detect the expression of cleared caspase-3,B-cell lymphoma gene-2-associated X protein(Bax),proto-oncogene(c-Myc),Cyclin D1,total GSK-3β(t-GSK-3β),phosphorylated GSK-3β(p-GSK-3β),totalβ-Catenin(t-β-Catenin)and phosphorylatedβ-catenin(p-β-Catenin)proteins in hippocampus.Results Compared with the PTSD group,the number of crawling spaces,standing times,total movement distance and times of crossing the original platform of rats were higher in the Sal B low-dose group,the Sal B high-dose group and the GSK-3βinhibitor group.The escape latency and the time to cross the original platform for the first time were shorter,the apoptosis rate of hippocampal neurons and the expression levels of Bax,cleaved caspase-3,t-GSK-3βand p-β-Catenin proteins in hippocampus were lower,and the expression levels of Cyclin D1,c-Myc,p-GSK-3β,t-β-Catenin proteins were higher(P<0.05).Conclusion Sal B can reduce the apoptosis and damage of hippocampal neurons in rats with PTSD and improve cognitive dysfunction in rats,and inhibit the GSK-3β/β-Catenin signal pathway.

关 键 词：应激障碍 创伤后 丹参酸B 认知功能障碍 糖原合成酶激酶3 Β连环素 神经元 细胞凋亡 

分 类 号：R285.5[医药卫生—中药学]