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- W2087712400 abstract "TLRs have been studied extensively in the context of pathogen challenges, yet their role in the unchallenged lung is unknown. Given their direct interface with the external environment, TLRs in the lungs are prime candidates to respond to air constituents, namely particulates and oxygen. The mechanism whereby the lung maintains structural integrity in the face of constant ambient exposures is essential to our understanding of lung disease. Emphysema is characterized by gradual loss of lung elasticity and irreversible airspace enlargement, usually in the later decades of life and after years of insult, most commonly cigarette smoke. Here we show Tlr4–/– mice exhibited emphysema as they aged. Adoptive transfer experiments revealed that TLR4 expression in lung structural cells was required for maintaining normal lung architecture. TLR4 deficiency led to the upregulation of what we believe to be a novel NADPH oxidase (Nox), Nox3, in lungs and endothelial cells, resulting in increased oxidant generation and elastolytic activity. Treatment of Tlr4–/– mice or endothelial cells with chemical NADPH inhibitors or Nox3 siRNA reversed the observed phenotype. Our data identify a role for TLR4 in maintaining constitutive lung integrity by modulating oxidant generation and provide insights into the development of emphysema." @default.
- W2087712400 created "2016-06-24" @default.
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- W2087712400 date "2006-11-01" @default.
- W2087712400 modified "2023-09-25" @default.
- W2087712400 title "Toll-like receptor 4 deficiency causes pulmonary emphysema" @default.
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- W2087712400 doi "https://doi.org/10.1172/jci28139" @default.
- W2087712400 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1616193" @default.
- W2087712400 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17053835" @default.
- W2087712400 hasPublicationYear "2006" @default.
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