摘要
目的:探究羟基红花黄色素A(HSYA)对脑缺血损伤后小胶质细胞NLRP3表达的影响及机制。方法:采用SD雄性大鼠建立大脑中动脉闭塞再灌注(MCAO/R)模型,造模成功后24 h采用Longa评分法和转角试验评估神经功能缺损程度,Western blot和免疫荧光检测JAK2/STAT3通路及NLRP3表达,ELISA检测IL-1β、IL-6、TNF-α水平。利用小胶质细胞建立糖氧剥夺/复糖氧(OGD/R)模型,使用JAK2和STAT3抑制剂AG490进一步验证HSYA对NLRP3的作用机制。结果:与假手术组相比,MCAO/R组神经功能损伤加重(P<0.01),HSYA治疗可改善神经功能(P<0.01)。MCAO/R组p-JAK2、p-STAT3和NLRP3表达高于假手术组(P<0.01),HSYA治疗后p-JAK2、p-STAT3和NLRP3表达降低(P<0.01)。与假手术组相比,MCAO/R组炎症因子IL-1β、IL-6和TNF-α表达升高(P<0.01),HSYA抑制了IL-1β、IL-6和TNF-α表达(P<0.01或P<0.05)。体外实验中,OGD/R组p-JAK2、p-STAT3和NLRP3表达较正常对照组明显升高(P<0.01),加入AG490后JAK2、STAT3磷酸化水平降低,NLRP3表达被抑制(P<0.01)。OGD/R组炎症因子IL-1β、IL-6和TNF-α表达与正常对照组相比升高(P<0.01),HSYA抑制了IL-1β、IL-6和TNF-α表达(P<0.01或P<0.05)。结论:HSYA可能通过调控JAK2/STAT3信号通路抑制缺血缺氧后小胶质细胞NLRP3表达,从而减轻脑损伤。
Objective:To explore effects and mechanism of Hydroxylsafflower Yellow A(HSYA)on expression of NLRP3 in glial cells after cerebral ischemic injury.Methods:A middle cerebral artery occlusion/reperfusion(MCAO/R)model was established in male SD rats.After successfully modeling for 24 h,Longa scoring and corner test were used to evaluate degree of neurological dys-function.Western blot and immunofluorescence were used to detect expressions of JAK2/STAT3 molecules and NLRP3,ELISA was used to measure IL-1β,IL-6 and TNF-αlevels.A glucose-oxygen deprivation/reperfusion(OGD/R)model was established in microg-lia,and JAK2 and STAT3 inhibitor AG490 was used to further verify action of HSYA on NLRP3.Results:Compared with sham group,neurological dysfunction aggravated in MCAO/R group(P<0.01),HSYA treatment improved neurological function(P<0.01).Expressions of p-JAK2,p-STAT3 and NLRP3 in MCAO/R group were higher than those in the sham group(P<0.01);and HSYA treatment reduced expressions of p-JAK2,p-STAT3 and NLRP3(P<0.01).Levels of inflammatory factors IL-1β,IL-6 and TNF-αwere higher in MCAO/R group than sham group(P<0.01),and HSYA inhibited expressions of IL-1β,IL-6 and TNF-α(P<0.01 or P<0.05).In vi-tro experiments showed expressions of p-JAK2,p-STAT3 and NLRP3 in OGD/R group were significantly higher than normal control group(P<0.01),after adding AG490,phosphorylation of JAK2 and STAT3 decreased,NLRP3 expression was inhibited(P<0.01).Inflammatory cytokines IL-1β,IL-6 and TNF-αlevels were higher in OGD/R group than normal control group(P<0.01),and HSYA inhibited expressions of IL-1β,IL-6 and TNF-α(P<0.01 or P<0.05).Conclusion:HSYA alleviates brain damage,probably by regu-lating JAK2/STAT3 signaling pathway and inhibiting NLRP3 expression in microglia after cerebral ischemia and hypoxia.
作者
殷丽君
吴艺舸
但存燕
刘可心
张嘉旭
马存根
马东
宋丽娟
YIN Lijun;WU Yige;DAN Cunyan;LIU Kexin;ZHANG Jiaxu;MA Cungen;MA Dong;SONG Lijuan(Key Laboratory of Multiple Sclerosis for Qi Benefit and Blood Circulation/Neurobiology Research Center,State Administration of Traditional Chinese Medicine,Shanxi University of Chinese Medicine,Jinzhong 030619,China;Department of Neurosurgery,Sinopath Coal Group General Hospital,Datong 031203,China;Key Laboratory of Cellular Physiology of Shanxi Medical University,Co-constructed by Province and Ministry of Education,Taiyuan 030001,China)
出处
《中国免疫学杂志》
北大核心
2025年第8期1820-1825,1832,共7页
Chinese Journal of Immunology
基金
国家自然科学基金项目(82004028)
中国博士后科学基金面上项目(2020M680912)
国家中医药管理局“张仲景传承与创新专项”(GZY-KJS-2022-048-1)
山西省科技创新人才青年团队项目(202204051001028)
山西中医药大学2022年度科技创新团队项目(2022TD2010)
山西省卫健委医学科技领军团队项目(2020TD05)
山西中医药大学青年科学家培育项目(2021PY-QN-09)
山西中医药大学学科建设经费(2023XKJS-02)。
