Identification of oxidative stress and toll-like receptor 4 signaling as a key pathway of acute lung injury

Multiple lung pathogens such as chemical agents, H5N1 avian flu, or SARS cause high lethality due to acute respiratory distress syndrome. Here we report that Toll-like receptor 4 (TLR4) mutant mice display natural resistance to acid-induced acute lung injury (ALI). We show that TLR4-TRIF-TRAF6 signa...

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Bibliographic Details
Published in:Cell
Main Authors: Imai, Yumiko, Kuba, Keiji, Neely, G Greg, Yaghubian-Malhami, Rubina, Perkmann, Thomas, van Loo, Geert, Ermolaeva, Maria, Veldhuizen, Ruud, Leung, YH Connie, Wang, Hongliang, Liu, Haolin, Sun, Yang, Pasparakis, Manolis, Kopf, Manfred, Mech, Christin, Bavari, Sina, Peiris, JS Malik, Slutsky, Arthur S, Akira, Shizuo, Hultqvist, Malin, Holmdahl, Rikard, Nicholls, John, Jiang, Chengyu, Binder, Christoph J, Penninger, Josef M
Format: Article in Journal/Newspaper
Language:English
Published: 2008
Subjects:
Biology and Life Sciences
APOPTOTIC CELLS
SYNCYTIAL VIRUS
APOLIPOPROTEIN-E
PULMONARY SURFACTANT
FACTOR-KAPPA-B
1918 PANDEMIC VIRUS
LOW-DENSITY-LIPOPROTEIN
RESPIRATORY-DISTRESS-SYNDROME
TRANSCRIPTION FACTORS
OXIDIZED PHOSPHOLIPIDS
Avian flu
Online Access:https://biblio.ugent.be/publication/2976377
http://hdl.handle.net/1854/LU-2976377
https://doi.org/10.1016/j.cell.2008.02.043
https://biblio.ugent.be/publication/2976377/file/2976404
Description
Summary:Multiple lung pathogens such as chemical agents, H5N1 avian flu, or SARS cause high lethality due to acute respiratory distress syndrome. Here we report that Toll-like receptor 4 (TLR4) mutant mice display natural resistance to acid-induced acute lung injury (ALI). We show that TLR4-TRIF-TRAF6 signaling is a key disease pathway that controls the severity of ALI. The oxidized phospholipid (OxPL) OxPAPC was identified to induce lung injury and cytokine production by lung macrophages via TLR4-TRIF. We observed OxPL production in the lungs of humans and animals infected with SARS, Anthrax, or H5N1. Pulmonary challenge with an inactivated H5N1 avian influenza virus rapidly induces ALI and OxPL formation in mice. Loss of TLR4 or TRIF expression protects mice from H5N1-induced ALI. Moreover, deletion of ncf1, which controls ROS production, improves the severity of H5N1-mediated ALI. Our data identify oxidative stress and innate immunity as key lung injury pathways that control the severity of ALI.

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