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Journal Article
Research Support, Non-U.S. Gov't
Pulmonary C-fiber degeneration downregulates IFN-γ receptor 1 via IFN-α induction to attenuate RSV-induced airway hyperresponsiveness.
Virology 2017 October
Respiratory syncytial virus (RSV) is a leading cause of respiratory infection in infants. Unfortunately, no effective vaccine or treatment against RSV is currently available. Pulmonary C-fibers (PCFs) are critical for regulating pulmonary inflammation and airway hyperresponsiveness (AHR). We previously reported that IFN-γ partially mediated RSV-induced airway disorders. In this study, we found that PCF degeneration alleviated RSV-induced airway inflammation, especially AHR by downregulating IFN-γ receptor 1 (IFNGR1), but had no effect on IFN-γ induction. In contrast, PCF degeneration actually increased IFN-α/β levels, as were the levels of STAT1 and phosphorylated STAT1 (pSTAT1). Exogenous IFN-α treatment induced STAT1 activation and downregulated IFNGR1 expression. These results suggest that PCFs affect IFNGR1 expression by inducing IFN-α to regulate IFN-γ-mediated airway inflammation and AHR. Thus, targeting PCFs activation may help control RSV-induced airway disorders, especially AHR, even with the presence of inflammation.
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