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南京医科大学学报(自然科学版) 第44卷第9期
·1198 · Journal of Nanjing Medical University(Natural Sciences) 2024年9月
·基础研究·
Sublytic C5b⁃9 上调 KLF5 促进 Thy⁃1 肾炎大鼠肾小球系膜细胞
生成IL⁃23的作用
刘 玉 ,应 帅 ,罗 灿 ,李 玉 ,荣 灿 ,王迎伟 ,邱 文 2*
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江苏卫生健康职业学院临床医学院微生物与免疫学教研室,江苏 南京 211800;南京医科大学基础医学院免疫学系,江
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苏 南京 211166;江苏卫生健康职业学院临床医学院全科教研室,江苏 南京 211800
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[摘 要] 目的:研究亚溶解型C5b⁃9(sublytic C5b⁃9)上调转录因子Krüppel样因子5(Krüppel⁃like factor 5,KLF5)促进Thy⁃1肾炎
(Thy⁃1 nephritis,Thy⁃1N)大鼠肾小球系膜细胞(glomerular mesangial cell,GMC)产生炎症因子白细胞介素(interleukin,IL)⁃23的作
用。方法:①建立大鼠Thy⁃1N模型和体外培养大鼠GMC,用Western blot(WB)检查Thy⁃1N大鼠肾组织和受sublytic C5b⁃9刺激的
GMC中KLF5和IL⁃23的表达。②分别将KLF5过表达质粒(pIRES2⁃KLF5)或KLF5小干扰质粒(shKLF5)转染GMC,通过实时荧
光定量PCR和WB检测KLF5和IL⁃23的mRNA和蛋白水平。③将IL⁃23全长启动子荧光素酶报告基因质粒(pGL3⁃IL⁃23⁃FL)转染
GMC,再给予sublytic C5b⁃9刺激,或将pGL3⁃IL⁃23⁃FL与pIRES2⁃KLF5或shKLF5共转染GMC,用荧光素酶报告基因实验检测
IL⁃23启动子活性的变化。④将慢病毒(lentivirus,LV)包装的LV⁃shKLF5和LV⁃shCTR行肾动脉灌注术导入大鼠肾组织,经小
动物脏器可见光三维成像和冰冻切片观察GFP表达,证实LV⁃shCTR在肾组织中富集效率。之后再复制大鼠Thy⁃1N,用WB检
查肾组织中KLF5和IL⁃23的蛋白表达。结果:①Thy⁃1N大鼠的肾组织和sublytic C5b⁃9刺激的GMC中,KLF5和IL⁃23的表达均
显著升高,且KLF5的表达高峰稍早于IL⁃23。②在GMC中过表达或敲低KLF5能分别引起IL⁃23表达的升高或降低。③Sublytic
C5b⁃9刺激或KLF5过表达均可增加GMC中IL⁃23启动子的活性,但敲低KLF5后可明显下调由sublytic C5b⁃9刺激GMC诱导的
IL⁃23启动子活性。④敲低Thy⁃1N大鼠肾组织中KLF5的表达后,其肾组织中IL⁃23的表达水平明显降低。结论:大鼠Thy⁃1N
发病早期,sublytic C5b⁃9刺激GMC后可通过上调KLF5促进IL⁃23基因的转录与表达。
[关键词] Thy⁃1肾炎;亚溶解型C5b⁃9;肾小球系膜细胞;krüppel样因子5;白细胞介素⁃23
[中图分类号] R692.3 [文献标志码] A [文章编号] 1007⁃4368(2024)09⁃1198⁃09
doi:10.7655/NYDXBNSN240571
Sublytic C5b⁃9 induces IL⁃23 production in glomerular mesangial cells of rats with Thy⁃1
nephritis via up⁃regulated KLF5 expression
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LIU Yu ,YING Shuai ,LUO Can ,LI Yu ,RONG Can ,WANG Yingwei ,QIU Wen 2*
1 Department of Microbiology and Immunology,School of Clinical Medicine,Jiangsu Health Vocational College,
Nanjing 211800;Department of Immunology,School of Basic Medicine,Nanjing Medical University,Nanjing
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211166;Department of General Practice,School of Clinical Medicine,Jiangsu Health Vocational College,Nanjing
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211800,China
[Abstract] Objective:To explore the role of sublytic C5b⁃9 upregulating the transcription factor Krüppel⁃like factor 5(KLF5)in
promoting the production of the inflammatory cytokine interleukin⁃23(IL⁃23)in glomerular mesangial cells(GMCs)of rats with Thy⁃1
nephritis(Thy⁃1N). Methods:①A rat model of Thy⁃1N was established and rat GMCs were cultured in vitro. The expression levels of
KLF5 and IL⁃23 in the renal tissues of Thy⁃1N rats and in GMCs stimulated by sublytic C5b⁃9 were detected by using Western blot
(WB). ②The levels of mRNA and protein of KLF5 and IL⁃23 in the GMCs transfected with either a KLF5 overexpressing plasmid
(pIRES2 ⁃ KLF5)or a KLF5 small interfering plasmid(shKLF5)were examined by RT ⁃ qPCR and WB. ③ The full ⁃ length IL ⁃ 23
promoter luciferase reporter gene plasmid(pGL3⁃IL⁃23⁃FL)was transfected into GMCs,followed by stimulation with sublytic C5b⁃9.
[基金项目] 国家自然科学基金(82171740);江苏省高等学校基础科学(自然科学)研究项目资助(23KJD310001)
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通信作者(Corresponding author),E⁃mail:qiuwen@njmu.edu.cn

