Chini B A, Fiedler M A, Milligan L, Hopkins T, Stark J M
Division of Pulmonary Medicine, Children's Hospital, Pittsburgh, Pennsylvania, USA.
J Virol. 1998 Feb;72(2):1623-6. doi: 10.1128/JVI.72.2.1623-1626.1998.
To determine the molecular mechanism(s) of respiratory syncytial virus (RSV)-induced intercellular adhesion molecule-1 (ICAM-1) upregulation in respiratory epithelial cells (REC; A549 cell cultures), we investigated the roles of the transcription factors NF-kappaB and C/EBP. Increases in ICAM-1 message required de novo mRNA synthesis. ICAM-1 promoter constructs (luciferase reporter gene) transfected into A549 monolayers demonstrated promoter activation following RSV infection. Activation was abolished by site-specific mutation of the NF-kappaB (-228) or C/EBP (-239) sites. These data support the critical role of the activation of NF-kappaB and C/EBP in RSV-induced ICAM-1 expression by REC.
为了确定呼吸道合胞病毒(RSV)诱导呼吸道上皮细胞(REC;A549细胞培养物)中细胞间黏附分子-1(ICAM-1)上调的分子机制,我们研究了转录因子NF-κB和C/EBP的作用。ICAM-1信使RNA的增加需要从头合成mRNA。转染到A549单层细胞中的ICAM-1启动子构建体(荧光素酶报告基因)在RSV感染后表现出启动子激活。NF-κB(-228)或C/EBP(-239)位点的位点特异性突变消除了激活。这些数据支持NF-κB和C/EBP激活在RSV诱导REC表达ICAM-1中的关键作用。