Bao X, Liu T, Spetch L, Kolli D, Garofalo R P, Casola A
Department of Pediatrics, University of Texas Medical Branch, Galveston, Texas, USA.
Virology. 2007 Nov 10;368(1):91-101. doi: 10.1016/j.virol.2007.06.023. Epub 2007 Jul 25.
Human metapneumovirus (hMPV) is a major cause of lower respiratory tract infections (LRTIs) in infants, elderly and immunocompromised patients. In this study, we show that hMPV can infect in a similar manner epithelial cells representative of different tracts of the airways. hMPV-induced expression of chemokines IL-8 and RANTES in primary small alveolar epithelial cells (SAE) and in a human alveolar type II-like epithelial cell line (A549) was similar, suggesting that A549 cells can be used as a model to study lower airway epithelial cell responses to hMPV infection. A549 secreted a variety of CXC and CC chemokines, cytokines and type I interferons, following hMPV infection. hMPV was also a strong inducer of transcription factors belonging to nuclear factor (NF)-kappaB, interferon regulatory factors (IRFs) and signal transducers and activators of transcription (STATs) families, which are known to orchestrate the expression of inflammatory and immunomodulatory mediators.
人偏肺病毒(hMPV)是婴儿、老年人和免疫功能低下患者下呼吸道感染(LRTIs)的主要病因。在本研究中,我们发现hMPV能够以类似的方式感染代表气道不同部位的上皮细胞。hMPV诱导原代小肺泡上皮细胞(SAE)和人II型肺泡样上皮细胞系(A549)中趋化因子IL-8和RANTES的表达情况相似,这表明A549细胞可作为研究下呼吸道上皮细胞对hMPV感染反应的模型。hMPV感染后,A549分泌多种CXC和CC趋化因子、细胞因子和I型干扰素。hMPV还是核因子(NF)-κB、干扰素调节因子(IRFs)以及信号转导和转录激活因子(STATs)家族转录因子的强效诱导剂,这些转录因子已知可协调炎症和免疫调节介质的表达。