miR-146a调控TLR4/NF-κB通路对脑出血模型大鼠的保护作用及机制研究
Protective effect and mechanism of TLR4/NF-κB pathway regulated by miR-146a in intracerebral hemorrhage model rats
吴俊波 1杨杰 2肖锋 1李金亮1
作者信息
- 1. 萍乡市第二人民医院,萍乡 337000
- 2. 萍乡市第三人民医院,萍乡 337099
- 折叠
摘要
目的:探索miR-146a调控TLR4/NF-κB通路对脑出血模型大鼠炎症损伤及神经保护的作用及可能作用机制.方法:选取40只大鼠,随机分为假手术组、模型组、过表达miR-146a腺病毒注射组及阴性病毒注射组,每组10只.Garcia评分评定神经功能;HE染色观察脑组织改变;ELISA检测炎症因子水平;Western blot及RT-PCR检测脑组织TLR4、NF-κB蛋白、基因表达.结果:与模型组相比,过表达miR-146a腺病毒注射组大鼠神经功能评分升高(P<0.05).模型组大鼠脑组织细胞形态异常,伴有水肿及炎症;过表达miR-146a腺病毒注射组大鼠脑组织细胞形态改善,水肿及炎症减轻.模型组大鼠炎症因子水平较假手术组升高(P<0.05);过表达miR-146a腺病毒注射组大鼠炎症因子水平较模型组下降(P<0.05).模型组大鼠TLR4、NF-κB蛋白及mRNA表达较假手术组增加(P<0.05);过表达miR-146a腺病毒注射组大鼠TLR4、NF-κB蛋白及mRNA表达较模型组下降(P<0.05).结论:miR-146a可改善脑出血模型大鼠神经功能,减轻炎症损伤,可能通过抑制脑组织TLR4/NF-κB信号通路激活降低炎症因子水平实现.
Abstract
Objective:To explore role of miR-146a in regulating TLR4/NF-κB pathway on inflammatory injury and neuropro-tection in intracerebral hemorrhage model rats and its possible mechanism.Methods:A total of 40 rats were selected and randomly divided into sham,model,over-expressing miR-146a adenovirus and negative virus injection groups,with 10 rats in each group.Garcia score was used for neurological function;HE staining was used to observe changes of brain tissues.ELISA was used to detect inflammatory factors levels.TLR4,NF-κB protein and gene expressions in brain tissues were detected by Western blot and RT-PCR.Results:Compared with model group,neural function score of overexpressed miR-146a adenovirus injection group was increased(P<0.05).Model group had abnormal cell morphology,edema and inflammation.Cell morphology,edema and inflammation were alleviated in overexpressed miR-146a adenovirus injection group.Inflammatory factors levels in model group were higher than sham group(P<0.05).Inflammatory factors levels in overexpressed miR-146a adenovirus injection group were lower than model group(P<0.05).TLR4,NF-κB protein and mRNA expressions in model group were increased than sham group(P<0.05).TLR4,NF-κB protein and mRNA expressions in overexpressed miR-146a adenovirus injection group were decreased than model group(P<0.05).Conclusion:miR-146a can improve neural function and reduce inflammatory injury in rats with intracerebral hemorrhage,possibly by inhibiting activation of TLR4/NF-κB signaling pathway and reducing inflammatory factors levels of brain tissues.
关键词
miR-146a/TLR4/NF-κB通路/脑出血/保护作用Key words
miR-146a/TLR4/NF-κB pathway/Intracerebral hemorrhage/Protective effect引用本文复制引用
基金项目
江西省卫生健康委科技项目(202212091)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据