香烟烟雾降低了上皮细胞对鼻病毒感染的先天反应。

Cigarette smoke decreases innate responses of epithelial cells to rhinovirus infection.

机构信息

Veterans Medical Research Foundation, and Department of Medicine, University of California at San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0732, USA.

出版信息

Am J Respir Cell Mol Biol. 2011 Jan;44(1):118-26. doi: 10.1165/rcmb.2009-0266OC. Epub 2010 Mar 11.

Abstract

Exposure to cigarette smoke is associated with a significant increase in the risk for respiratory viral infections. The airway epithelium is the primary target for both cigarette smoke and respiratory viral infection. We investigated the effects of cigarette smoke on the response of airway epithelial cells to rhinovirus infection. We found that pre-exposure of BEAS-2B cells or primary normal human bronchial epithelial cells (NHBEs) to cigarette smoke extract (CSE) reduced the induction of mRNA of the chemokines CXCL10 and CCL5 by either the viral mimic polyinosine-polycytidylic acid (Poly I:C) or human rhinovirus 16 (HRV-16) infection. The HRV-16-induced release of CXCL10 and CCL5 was also significantly suppressed by CSE. Activation of the IFN mediator STAT-1 and the activation of JNK by poly I:C and HRV-16 were partially suppressed by pre-exposure to CSE. In contrast, the poly I:C-induced and HRV-16-induced phosphorylation of ERK1/2 was unaffected by CSE. HRV-16-stimulated IFN-β mRNA was also significantly reduced by CSE. Because suppression of the IFN response to viral infection was associated with increased viral production, we assessed HRV-16 RNA concentrations. Exposure to CSE resulted in an increase in HRV-16 RNA at 48 hours after the infection of BEAS-2B cells. These data demonstrate that exposure to CSE alters the response of airway epithelial cells to HRV infection, leading to decreased activation of the IFN-STAT-1 and SAP-JNK pathways, the suppression of CXCL10 and CCL5 production, and increased viral RNA. A diminished, early epithelial-initiated antiviral response to rhinovirus infection could contribute to the increased susceptibility of subjects to prolonged respiratory viral infections after exposure to cigarette smoke.

摘要

暴露于香烟烟雾会显著增加呼吸道病毒感染的风险。气道上皮细胞是香烟烟雾和呼吸道病毒感染的主要靶标。我们研究了香烟烟雾对气道上皮细胞对鼻病毒感染反应的影响。我们发现,BEAS-2B 细胞或原代正常人支气管上皮细胞(NHBE)暴露于香烟烟雾提取物(CSE)会降低病毒类似物聚肌胞苷酸(Poly I:C)或人鼻病毒 16(HRV-16)感染诱导的趋化因子 CXCL10 和 CCL5 的 mRNA 诱导。CSE 还显著抑制 HRV-16 诱导的 CXCL10 和 CCL5 的释放。Poly I:C 和 HRV-16 诱导的 STAT-1 干扰素介体的激活和 JNK 的激活部分被 CSE 预先暴露所抑制。相比之下,Poly I:C 诱导和 HRV-16 诱导的 ERK1/2 磷酸化不受 CSE 影响。CSE 还显著降低 HRV-16 刺激的 IFN-β mRNA。因为对病毒感染的 IFN 反应的抑制与病毒产量的增加有关,我们评估了 HRV-16 RNA 浓度。暴露于 CSE 会导致感染 BEAS-2B 细胞 48 小时后 HRV-16 RNA 增加。这些数据表明,暴露于 CSE 改变了气道上皮细胞对 HRV 感染的反应,导致 IFN-STAT-1 和 SAP-JNK 途径的激活减少,CXCL10 和 CCL5 的产生受到抑制,以及病毒 RNA 的增加。对鼻病毒感染的上皮细胞早期抗病毒反应减弱可能导致暴露于香烟烟雾后,对呼吸道病毒感染的易感性增加。

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