水蛭素调节RhoA/ROCK信号通路对脑梗死大鼠神经元细胞凋亡和炎症反应的影响  

Impacts of hirudin on neuronal apoptosis and inflammatory response in rats with cerebral infarction by regulating RhoA/ROCK signaling pathway

作　　者：那丽莎 曲娜 于雪 栗昭生 NA Lisha;QU Na;YU Xue;LI Zhaosheng(Department of Pharmacy,Hongqi Hospital Affiliated to Mudanjiang Medical College,Mudanjiang 157011,China;Department of Neurology,Hongqi Hospital Affiliated to Mudanjiang Medical College,Mudanjiang 157011,China)

机构地区：[1]牡丹江医学院附属红旗医院药学部,牡丹江157011 [2]牡丹江医学院附属红旗医院神经内科,牡丹江157011

出　　处：《中国免疫学杂志》2024年第8期1640-1645,共6页Chinese Journal of Immunology

基　　金：黑龙江省中医药科研项目(ZHY2020-181);黑龙江省卫生健康委科研课题(2019-416)。

摘　　要：目的:探讨水蛭素(HRD)调节Ras同源基因家族成员A(RhoA)/Rho相关卷曲螺旋形成蛋白激酶(ROCK)信号通路对脑梗死大鼠神经元细胞凋亡和炎症反应的影响。方法:将SD大鼠分为Ct组、Model组、低剂量HRD组(HRD-L组,13.33 mg/kg)、高剂量HRD组(HRD-H组,26.66 mg/kg)、阳性对照尼莫地平组(NMDP组,40 mg/kg)、U-46619(RhoA激动剂,0.03 mg/kg)组、HRD-H+U-46619组(26.66 mg/kg+0.03 mg/kg),每组24只。除Ct组外,其他组大鼠均利用改良线栓法构建脑梗死模型,Ct组大鼠仅暴露血管,不进行切口和插线栓。建模成功1 h后,进行给药处理。给药1次/d,持续4周。Zea-Longa法评估大鼠神经功能;干湿重法检测大鼠脑组织含水量;2,3,5-三苯基四唑氯化物(TTC)染色测定大鼠脑梗死体积;TUNEL染色检测大鼠海马CA1区神经元凋亡;ELISA检测大鼠海马组织中TNF-α、IL-1β、IL-6水平;Western blot检测大鼠海马组织中裂解的天冬氨酸特异性半胱氨酸蛋白酶-3(Cleaved-Caspase-3)、Bcl-2相关X蛋白(Bax)、RhoA、ROCK1、ROCK2蛋白表达。结果:与Ct组比较,Model组大鼠神经功能评分、脑组织含水量、脑梗死体积百分比、神经元凋亡率、TNF-α、IL-1β、IL-6水平、Cleaved-Caspase-3、Bax、RhoA、ROCK1、ROCK2蛋白表达升高(P<0.05);与Model组比较,HRD-L组、HRD-H组、NMDP组大鼠神经功能评分、脑组织含水量、脑梗死体积百分比、神经元凋亡率、TNF-α、IL-1β、IL-6水平、Cleaved-Caspase-3、Bax、RhoA、ROCK1、ROCK2蛋白表达降低,而U-46619组对应指标变化呈相反趋势(P<0.05);与HRD-H组比较,HRD-H+U-46619组大鼠神经功能评分、脑组织含水量、脑梗死体积百分比、神经元凋亡率、TNF-α、IL-1β、IL-6水平、Cleaved-Caspase-3、Bax、RhoA、ROCK1、ROCK2蛋白表达升高(P<0.05)。结论:HRD可能通过抑制RhoA/ROCK信号通路抑制脑梗死大鼠神经元凋亡及炎症反应。Objective:To investigate the impacts of hirudin(HRD)on neuronal apoptosis and inflammatory response in rats with cerebral infarction by regulating Ras homolog gene family member A(RhoA)/Rho-associated coiled-coil-forming protein kinase(ROCK)signaling pathway.Methods:SD rats were grouped into Ct group,Model group,low-dose HRD group(HRD-L group,13.33 mg/kg),high-dose HRD group(HRD-H group,26.66 mg/kg),positive control Nimodipine group(NMDP group,40 mg/kg),U-46619(RhoA agonist,0.03 mg/kg)group and HRD-H+U-46619 group(26.66 mg/kg+0.03 mg/kg),with 24 rats per group.Except for the Ct group,rats in other groups constructed the rat model of cerebral infarction by the modified suture method.The rats in the Ct group only exposed the blood vessels without incision and suture insertion.After 1 hour of successful modeling,drug treatment was carried out,once a day for 4 weeks.Zea-Longa method was applied to evaluate the neurological function of rats;dry and wet weight method was applied to detect the water content of rat brain tissue;2,3,5-triphenyltetrazolium chloride(TTC)staining was applied to determine the volume of cerebral infarction in rats;TUNEL staining was applied to detect the apoptosis of neurons in the CA1 region of the hippocampus of rats.The levels of TNF-α,IL-1βand IL-6 in rat hippocampus were detected by ELISA;the protein expressions of cleaved-Caspase-3 Cleaved-Caspase-3,Bcl-2-associated X protein(Bax),RhoA,ROCK1 and ROCK2 in rat hippocampus were dedoi tected by Western blot.Results:Compared with Ct group,the neurological function scores,brain tissue water content,cerebral infarction volume percentage,neuron apoptosis rate,levels of TNF-α,IL-1β,IL-6,the protein expressions of Cleaved-Caspase-3,Bax,RhoA,ROCK1 and ROCK2 increased in the Model group(P<0.05).Compared with Model group,the neurological function scores,brain tissue water content,cerebral infarction volume percentage,neuron apoptosis rate,levels of TNF-α,IL-1β,IL-6,the protein expressions of Cleaved-Caspase-3,Bax,RhoA,ROCK1 and ROCK2 decreased

关 键 词：水蛭素 脑梗死 炎症 Ras同源基因家族成员A/Rho相关卷曲螺旋形成蛋白激酶信号通路 细胞凋亡 

分 类 号：R743.33[医药卫生—神经病学与精神病学]