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- W2155281178 abstract "Both respiratory syncytial virus (RSV) and influenza A virus induce nucleotide/P2Y purinergic receptor-mediated impairment of alveolar fluid clearance (AFC), which contributes to formation of lung edema. Although genetically dissimilar, both viruses generate double-stranded RNA replication intermediates, which act as Toll-like receptor (TLR)-3 ligands. We hypothesized that double-stranded RNA/TLR-3 signaling underlies nucleotide-mediated inhibition of amiloride-sensitive AFC in both infections. We found that addition of the synthetic double-stranded RNA analog poly-inosinic-cytidylic acid [poly(I:C)] (500 ng/ml) to the AFC instillate resulted in nucleotide/P2Y purinergic receptor-mediated inhibition of amiloride-sensitive AFC in BALB/c mice but had no effect on cystic fibrosis transmembrane regulator (CFTR)-mediated Cl − transport. Poly(I:C) also induced acute keratinocyte cytokine-mediated AFC insensitivity to stimulation by the β-adrenergic agonist terbutaline. Inhibitory effects of poly(I:C) on AFC were absent in TLR-3 −/− mice and were not replicated by addition to the AFC instillate of ligands for other TLRs except TLR-2. Intranasal poly(I:C) administration (250 μg/mouse) similarly induced nucleotide-dependent AFC inhibition 2–3 days later, together with increased lung water content and neutrophilic inflammation. Intranasal treatment of BALB/c mice with poly(I:C) did not induce airway hyperresponsiveness at day 2 but did result in insensitivity to airway bronchodilation by β-adrenergic agonists. These findings suggest that viral double-stranded RNA replication intermediates induce nucleotide-mediated impairment of amiloride-sensitive AFC in both infections, together with β-adrenergic agonist insensitivity. Both of these effects also occur in RSV infection. However, double-stranded RNA replication intermediates do not appear to be sufficient to induce either adenosine-mediated, CFTR-dependent Cl − secretion in the lung or severe, lethal hypoxemia, both of which are features of influenza infection." @default.
- W2155281178 created "2016-06-24" @default.
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- W2155281178 date "2011-07-01" @default.
- W2155281178 modified "2023-09-24" @default.
- W2155281178 title "Double-stranded RNA induces similar pulmonary dysfunction to respiratory syncytial virus in BALB/c mice" @default.
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- W2155281178 doi "https://doi.org/10.1152/ajplung.00398.2010" @default.
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