过表达锌指蛋白A20可抑制肺泡巨噬细胞炎症反应

目的:通过建立A20过表达肺泡巨噬细胞株,研究A20对肺泡巨噬细胞炎症反应的影响及调控机制。方法:构建携带A20基因的慢病毒载体,转染大鼠肺泡巨噬细胞(NR8383),筛选出稳定过表达A20基因的细胞株并行体外培养。向培养基中加入脂多糖(LPS,1μg/mL)进行干预,并于刺激后0.5、1、2、4h收集上清液及细胞。ELISA法测定上清液中细胞因子(TNF-α、IL-1β)及核因子κB(NF-κB)活性。Western印迹方法检测A20蛋白及核内p65含量。实时荧光定量PCR法测定A20mRNA含量。结果:LPS刺激后,A20过表达组(A20组)及正常对照组(VEC组)A20蛋白及mRNA含量...

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Bibliographic Details
Published in中国临床医学 Vol. 23; no. 6; pp. 715 - 719
Main Author 朱晓丹 王颖 毕晶 童琳 刘洁 宋元林 白春学
Format Journal Article
LanguageChinese
Published 复旦大学附属中山医院呼吸内科,上海,200032 2016
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ISSN1008-6358
DOI10.12025/j.issn.1008-6358.2016.20160822

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Summary:目的:通过建立A20过表达肺泡巨噬细胞株,研究A20对肺泡巨噬细胞炎症反应的影响及调控机制。方法:构建携带A20基因的慢病毒载体,转染大鼠肺泡巨噬细胞(NR8383),筛选出稳定过表达A20基因的细胞株并行体外培养。向培养基中加入脂多糖(LPS,1μg/mL)进行干预,并于刺激后0.5、1、2、4h收集上清液及细胞。ELISA法测定上清液中细胞因子(TNF-α、IL-1β)及核因子κB(NF-κB)活性。Western印迹方法检测A20蛋白及核内p65含量。实时荧光定量PCR法测定A20mRNA含量。结果:LPS刺激后,A20过表达组(A20组)及正常对照组(VEC组)A20蛋白及mRNA含量都升高,并于1h达高峰,之后逐渐下降;且A20组较VEC组A20水平明显升高(P〈0.05)。与VEC组相比,A20组培养上清液中细胞因子(TNF-α、IL-1β)水平明显降低(P〈0.05);NF-κB DNA结合活性及核内p65含量也降低(P〈0.05)。结论:A20能够抑制肺泡巨噬细胞NF-κB活性及TNF-α、IL-1β分泌,进而抑制肺泡巨噬细胞炎症反应活性。
Bibliography:31-1794/R
acute resp iratory d istress syndrom e; A 20 p ro tein; alv eolar; m acrop hage; inflam m atory response
ZHU Xiao-dan, WANG Ying, BI Jing, TONG Lin, LIU Jie , SONG Yuan-lin, BAI Clum-xue(D epartm ent of R esp iratory M edicine, Zhongshan H o sp ital, Fudan U n iv ersity , Shanghai 2 0 0 0 3 2 , China)
Objective : T o study th e effects of A 20 on the inflam m atory response of alveolar m acrophages and itsregulation m echanism through establish ing A 20 ov er-exp ressing alveolar m acrophage cell lines. Methods : Lentivirus-m ediatedexp ression v ector carrying A 20 gene was con stru cted , then it was transfected into ra t alveolar m acrophage cell lines ( N R 8 3 8 3 ) ,and th e cell lines w hich stably overexpressed A 20 gene w ere screened and cultured in v itr o . L ipopolysaccharide ( L P S , 1 y.g /m L ) w as added into the medium to interven e, th e culture supernatants and cells w ere collected 0. 5 ,1 ,2 , 4 hours afterstim u lation , E L IS A m ethod w as used to determ ine the activity of c
ISSN:1008-6358
DOI:10.12025/j.issn.1008-6358.2016.20160822