基于IL-6/STAT3和IL-2/STAT5信号通路探讨伏九贴敷药物调控Th17/Treg免疫平衡的抗哮喘作用机制  

Exploring the Mechanism of Anti-asthma Effect of Fujiu Patch on Modulation of Th17/Treg Immune Balance Based on IL-6/STAT3 and IL-2/STAT5 Signaling Pathways

作　　者：付昆 杨艳 陆一菱 仲蓬 赵岚 徐敏 FU Kun;YANG Yan;LU Yiling;ZHONG Peng;ZHAO Lan;XU Min(The Third People’s Hospital of Chengdu,Affiliated Hospital of Southwest Jiaotong University,The Second Affiliated Chengdu Clinical College of Chongqing Medical University,Chengdu 610031 Sichuan,China)

机构地区：[1]成都市第三人民医院,西南交通大学附属医院,重庆医科大学附属成都第二临床学院,四川成都610031

出　　处：《中药新药与临床药理》2024年第1期26-34,共9页Traditional Chinese Drug Research and Clinical Pharmacology

基　　金：四川省中医药管理局中医药科研专项课题(2020JC0009)。

摘　　要：目的考察伏九贴敷药物(白芥子、甘遂、延胡索、细辛组成)通过IL-6/信号转导器和转录激活因子3(STAT3)、IL-2/信号转导器和转录激活因子5(STAT5)信号通路对哮喘大鼠CD4+T辅助细胞17(Th17)/CD4+CD25+调节性T细胞(Treg)平衡的调节作用,揭示其抗哮喘的作用机制。方法采用卵白蛋白(OVA)和氢氧化铝混合液致敏激发造模,然后于大鼠大椎穴、肺俞穴和肾俞穴敷上伏九贴敷药物,每次贴敷4 h,隔日1次,共给药7次。采用免疫组化检测肺组织Th17特异细胞因子IL-17、Treg转录因子Foxp3的阳性表达;流式细胞术检测外周血中Th17、Treg细胞比例;免疫蛋白印迹法检测肺组织IL-6/STAT3和IL-2/STAT5通路相关蛋白的表达。结果与模型组比较,伏九贴敷组大鼠肺中IL-17的阳性表达量明显减少(P<0.01),Foxp3的阳性表达明显增加(P<0.05);同时IL-6蛋白和STAT3磷酸化蛋白表达水平明显降低(P<0.01),而IL-2蛋白和STAT5磷酸化蛋白表达水平明显升高(P<0.01),但总STAT3和STAT5蛋白表达均没有明显变化(P>0.05)。此外,伏九贴敷组大鼠外周血中Th17细胞比例低于模型组,而Treg细胞比例高于模型组,差异均具有统计学意义(P<0.01)。结论哮喘大鼠存在Th17/Treg免疫失衡,伏九贴敷药物可通过抑制哮喘大鼠IL-6表达,下调磷酸化STAT3的表达,降低产生IL-17的Th17细胞水平;同时增加IL-2表达,介导STAT5磷酸化,升高表达Foxp3的Treg细胞水平,促进Th17/Treg趋于平衡,抑制大鼠哮喘免疫应答,从而发挥抗哮喘效应。Objective This study aims to investigate the regulatory effects of Fujiu Patch(composed of Sinapis Semen,Kansui Radix,Corydalis Rhizoma and Asari Radix et Rhizoma)on the CD4+T helper 17 cell(Th17)/CD4+CD25+regulatory T cell(Treg)balance in asthmatic rats via the signal pathway of IL-6/signal transducer and activator of transcription 3(STAT3)as well as IL-2/signal transducer and activator of transcription 5(STAT5),and to reveal its anti-asthma mechanisms.Methods An experimental asthma model was constructed by ovalbumin(OVA)combined with aluminum hydroxide sensitization and challenge,and then the rats were administered with Fujiu Patch at Dazhui(DU14),Feishu(BL13)and Shenshu(BL23)points for 4 hours each time,once every other day for 7 times.Immunohistochemistry was used to detect the positive expressions of Th17 specific cytokine(IL-17)and Treg transcription factor(Foxp3)in rat lung tissue.The percentage of Th17 and Treg cells in peripheral blood was examined by flow cytometry analysis,and the expressions of IL-6/STAT3 and IL-2/STAT5 pathway-related proteins in lung tissue were assayed with Western Blot.Results Compared to the model group,IL-17 positive expression in the rat lung showed a significant reduction in the Fujiu Patch group(P<0.01),while the positive expression of Foxp3 was obviously increased(P<0.05).Meanwhile,the protein expression levels of IL-6 and phospho-STAT3 were were significantly declined(P<0.01),and the protein expression levels of IL-2 and phospho-STAT5 were were significantly elevated(P<0.01).However,there was no significant alteration in the total protein expressions of STAT3 and STAT5(P>0.05).Furthermore,the proportion of Th17 cells in peripheral blood of rats in the Fujiu Patch group was lower than that in the model group,while the proportion of Treg cells was higher than that in the model group.Statistically-significant differences were observed(all P<0.01).Conclusion These findings indicate that Th17/Treg immune imbalance occurs in asthmatic rat.Fujiu Patch may exert anti-asthma effects

关 键 词：伏九贴敷 哮喘 Th17/Treg平衡 IL-6/STAT3信号通路 IL-2/STAT5信号通路 大鼠 

分 类 号：R285.5[医药卫生—中药学]