雷公藤红素在实验性自身免疫性葡萄膜炎(EAU)小鼠眼组织中的抗炎作用及其对小胶质细胞极化的影响  

Anti-inflammatory effect of Celastrol in the ocular tissues of mice with experimental autoimmune uveitis and its impact on microglia polarization

作　　者：庞彬彬 夏沁韵 陈震[1] 邢怡桥[1] PANG Binbin;XIA Qinyun;CHEN Zhen;XING Yiqiao(Department of Ophthalmology,Renmin Hospital of Wuhan University,Wuhan 430060,Hubei Province,China)

机构地区：[1]武汉大学人民医院眼科中心,湖北省武汉市430060

出　　处：《眼科新进展》2024年第1期30-34,38,共6页Recent Advances in Ophthalmology

基　　金：湖北省卫生健康委员会面上项目(编号:WJ2021M156)。

摘　　要：目的探讨雷公藤红素在实验性自身免疫性葡萄膜炎(EAU)小鼠眼组织中的抗炎作用及其对小胶质细胞极化的影响。方法取健康6~8周龄B10.RIII小鼠36只,随机分为正常对照组、EAU溶剂对照组、雷公藤红素干预组,每组12只。将光感受器间维生素A类结合蛋白161-180和完全弗氏佐剂充分乳化混合后,注射于EAU溶剂对照组和雷公藤红素干预组小鼠双侧大腿和尾部皮下,总体积200μL,每只小鼠注射光感受器间维生素A类结合蛋白161-180的量为50μg。免疫后第7-14天,雷公藤红素干预组小鼠每天接受0.5 mg·kg^(-1)雷公藤红素腹腔注射治疗,EAU溶剂对照组小鼠注射同等剂量的无菌PBS缓冲溶液。免疫后第14天,通过裂隙灯显微镜观察各组小鼠眼前节表现及行组织切片HE染色,并参照Caspi分级标准对各组小鼠进行临床评分及组织病理学评分;免疫荧光染色观察小鼠眼内小胶质细胞活化情况;Western blot检测小鼠视网膜中诱导型一氧化氮合酶(iNOS)、精氨酸酶-1(Arg1)蛋白表达水平;qRT-PCR检测小鼠视网膜中炎症因子肿瘤坏死因子(TNF)-α、白细胞介素(IL)-1β、IL-6 mRNA相对表达量。采用Graphpad Prism 9.0统计软件进行数据分析。结果免疫后第14天,通过裂隙灯显微镜观察发现,EAU溶剂对照组小鼠眼前节可见虹膜血管扩张充血明显、角膜水肿、前房渗出;而雷公藤红素干预组小鼠眼前节炎症明显减轻,可见虹膜血管轻度充血。与正常对照组相比,EAU溶剂对照组与雷公藤红素干预组小鼠临床评分均升高,差异均有统计学意义(均为P<0.05)。雷公藤红素干预组小鼠临床评分低于EAU溶剂对照组,差异有统计学意义(P<0.05)。HE染色结果显示,免疫后第14天,EAU溶剂对照组小鼠出现严重的视网膜皱褶和脱离,炎症细胞弥漫浸润;而雷公藤红素干预组小鼠视网膜结构破坏轻微,可见少量炎症细胞浸润。与正常对照组相比,EAU溶剂对照组�Objective To investigate the anti-inflammatory action of Celastrol in the ocular tissues of mice with experimental autoimmune uveitis(EAU)and its effect on microglia polarization.Methods A total of 36 healthy B10.RIII mice at 6-8 weeks of age were selected and randomly divided into the normal control group,EAU solvent control group and Celastrol intervention group,with 12 mice in each group.The interphotoreceptor retinoid-binding protein(IRBP)161-180 and Freund’s complete adjuvant were mixed by thorough emulsification and injected subcutaneously into the bilateral thighs and tails of mice in the EAU solvent control group and the Celastrol intervention group with a total volume of 200μL and 50μg IRBP 161-180 in each mouse.On 7-14 days after immunization,mice in the Celastrol intervention group received a daily intraperitoneal injection of 0.5 mg·kg^(-1) Celastrol,and mice in the EAU solvent control group were injected with an equivalent dose of sterile Phosphate Buffered Saline solution.On the 14th day after immunization,the anterior segment of mice in each group was observed by slit-lamp microscope and Hematoxylin and Eosin(HE)staining of tissue sections was performed;the clinical and histopathological scores of mice in each group were obtained by reference to the Caspi grading standards;immunofluorescence staining was used to observe the activation of microglia in the eyes of mice;Western blot was used to detect the protein expression levels of inducible nitric oxide synthase(iNOS)and arginase-1(Arg1)in the retina;quantitative real-time PCR was used to detect the relative mRNA expression of inflammatory factors in the retina,such as tumor necrosis factor(TNF)-ɑ,interleukin(IL)-1βand IL-6.GraphPad Prism 9.0 was used for data analysis.Results On the 14th day after immunization,it was observed by the slit-lamp microscope that the anterior segment of mice in the EAU solvent control group was markedly congested with dilated iris blood vessels,corneal edema,and anterior chamber exudation;the inflammation in the

关 键 词：雷公藤红素 实验性自身免疫性葡萄膜炎 小胶质细胞 诱导型一氧化氮合酶 精氨酸酶-1 

分 类 号：R773[医药卫生—眼科]