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• W2809849009 abstract "Supplemental oxygen is a life-saving intervention administered to individuals suffering from respiratory distress, including adults with acute lung injury (ALI) and acute respiratory distress syndrome (ARDS). Despite the clinical benefit, supplemental oxygen can create a hyperoxic environment that increases reactive oxygen species, oxidative stress, and lung injury. We have previously shown that cytochrome P450 (CYP)1A enzymes decrease susceptibility to hyperoxia-induced lung injury. In this investigation, we determined the role of CYP1B1 in hyperoxic lung injury in vivo. Eight- to ten-week old C57BL/6 wild type (WT) and Cyp1b1-/- mice were exposed to hyperoxia (>95% O2) for 24-72 h or maintained in room air (21% O2). Lung injury was assessed by histology and lung weight to body weight (LW/BW) ratios. Extent of inflammation was determined by assessing pulmonary neutrophil infiltration and cytokine levels. Lipid peroxidation markers were quantified by gas chromatography mass spectrometry, and oxidative DNA adducts were quantified by 32P-postlabeling as markers of oxidative stress. We found that Cyp1b1-/- mice displayed attenuation of lung weight and pulmonary edema, particularly after 48-72 h of hyperoxia compared with WT controls. Further, Cyp1b1-/- mice displayed decreased levels of pulmonary oxidative DNA adducts and pulmonary isofurans after 24 h of hyperoxia. Cyp1b1-/- mice also showed increased pulmonary CYP1A1 and 1A2 and mRNA expression. In summary, our results support the hypothesis that Cyp1b1-/- mice display decreased hyperoxic lung injury than wild type counterparts and that CYP1B1 may act as a pro-oxidant during hyperoxia exposure, contributing to increases in oxidative DNA damage and accumulation of lipid hydroperoxides." @default.
• W2809849009 created "2018-07-10" @default.
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• W2809849009 date "2018-06-25" @default.
• W2809849009 modified "2023-09-26" @default.
• W2809849009 title "Mice Lacking the Cytochrome P450 1B1 Gene Are Less Susceptible to Hyperoxic Lung Injury Than Wild Type" @default.
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• W2809849009 doi "https://doi.org/10.1093/toxsci/kfy154" @default.
• W2809849009 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6154276" @default.
• W2809849009 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29939353" @default.
• W2809849009 hasPublicationYear "2018" @default.
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