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- W2777441678 abstract "Cigarette smokers and people exposed to second-hand smoke are at an increased risk for pulmonary viral infections, and yet the mechanism responsible for this heightened susceptibility is not understood. To understand the effect of cigarette smoke on susceptibility to viral infection, we used an air-liquid interface culture system and exposed primary human small airway epithelial cells (SAEC) to whole cigarette smoke, followed by treatment with the viral mimetic polyinosinic polycytidylic acid (poly I:C) or influenza A virus (IAV). We found that prior smoke exposure strongly inhibited production of proinflammatory (interleukin-6 and interleukin-8) and antiviral [interferon-γ-induced protein 10 (IP-10) and interferons] mediators in SAECs in response to poly I:C and IAV infection. Impaired antiviral responses corresponded to increased infection with IAV. This was associated with a decrease in phosphorylation of the key antiviral transcription factor interferon response factor 3 (IRF3). Here, we found that cigarette smoke exposure inhibited activation of Toll-like receptor 3 (TLR3) by impairing TLR3 cleavage, which was required for downstream phosphorylation of IRF3 and production of IP-10. These results identify a novel mechanism by which cigarette smoke exposure impairs antiviral responses in lung epithelial cells, which may contribute to increased susceptibility to respiratory infections." @default.
- W2777441678 created "2018-01-05" @default.
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- W2777441678 date "2018-03-01" @default.
- W2777441678 modified "2023-10-18" @default.
- W2777441678 title "Cigarette smoke dampens antiviral signaling in small airway epithelial cells by disrupting TLR3 cleavage" @default.
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- W2777441678 doi "https://doi.org/10.1152/ajplung.00406.2017" @default.
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