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- W2142772076 abstract "Alcohol abuse markedly increases the risk of sepsis-mediated acute lung injury. In a rat model, ethanol ingestion alone (in the absence of any other stress) causes pulmonary glutathione depletion, increased expression of transforming growth factor-β1 (TGF-β1), and alveolar epithelial barrier dysfunction, even though the lung appears grossly normal. However, during endotoxemia, ethanol-fed rats release more activated TGF-β1 into the alveolar space where it can exacerbate epithelial barrier dysfunction and lung edema. Ethanol ingestion activates the renin-angiotensin system, and angiotensin II is capable of inducing oxidative stress and TGF-β1 expression. We determined that lisinopril, an angiotensin-converting enzyme inhibitor that decreases angiotensin II formation, limited lung glutathione depletion, and treatment with either lisinopril or losartan, a selective angiotensin II type 1 receptor blocker, normalized TGF-β1 expression. The glutathione precursor procysteine also prevented TGF-β1 expression, suggesting that TGF-β1 may be induced indirectly by angiotensin II-mediated oxidative stress and glutathione depletion. Importantly, lisinopril treatment normalized barrier function in alveolar epithelial cell monolayers from ethanol-fed rats, and treatment with either lisinopril or losartan normalized alveolar epithelial barrier function in ethanol-fed rats in vivo, as reflected by lung liquid clearance of an intratracheal saline challenge, even during endotoxemia. In parallel, lisinopril treatment limited TGF-β1 protein release into the alveolar space during endotoxemia. Together, these results suggest that angiotensin II mediates oxidative stress and the consequent TGF-β1 expression and alveolar epithelial barrier dysfunction that characterize the alcoholic lung." @default.
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- W2142772076 date "2005-09-01" @default.
- W2142772076 modified "2023-10-02" @default.
- W2142772076 title "Angiotensin II mediates glutathione depletion, transforming growth factor-β1 expression, and epithelial barrier dysfunction in the alcoholic rat lung" @default.
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- W2142772076 doi "https://doi.org/10.1152/ajplung.00141.2005" @default.
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