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Influenza leaves a TRAIL to pulmonary edema
Rena Brauer, Peter Chen
Rena Brauer, Peter Chen
Published March 21, 2016
Citation Information: J Clin Invest. 2016;126(4):1245-1247. https://doi.org/10.1172/JCI86802.
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Influenza leaves a TRAIL to pulmonary edema

Abstract

Influenza infection can cause acute respiratory distress syndrome (ARDS), leading to poor disease outcome with high mortality. One of the driving features in the pathogenesis of ARDS is the accumulation of fluid in the alveoli, which causes severe pulmonary edema and impaired oxygen uptake. In this issue of the JCI, Peteranderl and colleagues define a paracrine communication between macrophages and type II alveolar epithelial cells during influenza infection where IFNα induces macrophage secretion of TRAIL that causes endocytosis of Na,K-ATPase by the alveolar epithelium. This reduction of Na,K-ATPase expression decreases alveolar fluid clearance, which in turn leads to pulmonary edema. Inhibition of the TRAIL signaling pathway has been shown to improve lung injury after influenza infection, and future studies will be needed to determine if blocking this pathway is a viable option in the treatment of ARDS.

Authors

Rena Brauer, Peter Chen

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