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- W2746776688 abstract "Obstructive sleep apnea (OSA) is a disorder with high morbidity in adults. OSA damages multiple organs and tissues, including the cardiovascular and cerebrovascular systems, the metabolism system, the lungs, liver and heart. OSA-induced damage is earliest and greatest to the pulmonary tissue. The present study established a rat OSA model of differing severity by inducing intermittent hypoxia with different concentrations of O2 and it was determined that OSA caused a severe oxidative stress response and pulmonary inflammation in a dose-dependent manner. OSA increased serum levels of C-reactive protein and 8-isoprostane and elevated the expression of malondialdehyde, tumor necrosis factor α, interleukin (IL)-1β and IL-6 in the pulmonary tissue. Furthermore, the expression of two important antioxidants, superoxide dismutase and glutathione, was downregulated following intermittent hypoxia. By contrast, levels of cylooxygenase 2 and inducible nitric oxide synthase, which are crucial in the antioxidative response, increased. In addition, OSA activates the nuclear factor erythroid 2-related factor 2 (Nrf2)/heme oxygenase (OH)-1 antioxidative signaling pathway. Finally, all increases and decreases in levels of inflammatory and antioxidative substances were dependent on oxygen concentrations. Therefore, the present study demonstrated that OSA, simulated by intermittent hypoxia, caused an oxidative stress response and pulmonary inflammation, and activated the canonical antioxidative Nrf2/HO-1 signaling pathway in a dose-dependent manner. These results may facilitate the development of clinical therapies to treat pulmonary diseases caused by OSA." @default.
- W2746776688 created "2017-08-31" @default.
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- W2746776688 date "2017-08-18" @default.
- W2746776688 modified "2023-10-13" @default.
- W2746776688 title "Intermittent hypoxia simulating obstructive sleep apnea causes pulmonary inflammation and activates the Nrf2/HO-1 pathway" @default.
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- W2746776688 doi "https://doi.org/10.3892/etm.2017.4971" @default.
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