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- W3147475275 abstract "Objective To investigate the protective effect and its mechanisms of N - acetylcysteine (NAC) on acute lung injury (ALI) caused by exposure to high concentration rocket liquid propellants asymmetrical dimethylhydrazine (UDMH) and dinitrogen tetroxide (N2O4). Methods Forty-two rats were randomly divided into three groups: the control group, the exposure group and the exposure plus the treatment group (NAC group). The rats of the latter two groups were exposed to UDMH 0. 98 mg/L for 10 minutes and then N2O4 0. 19 mg/L for another 10 minutes. After the exposure, the NAC group rats received immediately 150 mg/kg of NAC intravenously, and rein forced by intraperitoneal injection of NAC with a dose of 50 mg/kg 3 hours after the intravenous injection. The rats of other group were treated with saline in equal volume. All rats were killed after 6 hours. The lung wet to dry ratio (W/D ), the contents of lactate dehydrogenase (LDH) and total protein in bronchoalveolar lavage fluid (BALF), the activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH -Px) in lung tissue, and the malondialdehyde (MDA) of plasma were measured. Pathological examination was performed. Results The lung W/D ratio, the LDH and total protein in BALF, and the MDA of plasma were increased in the exposure group, while the activities of SOD and GSH - Px in lung tissue were decreased. The histopathology of the rats of exposure groups showed that there was exudation within alveolar spaces and prominent interstitial thickening of septa. In the NAC group, the values of the above findings were lowered, and the degree of lung injury was alleviated in histopathology. The lung W/D were negatively correlated with the activities of SOD and GSH-Px in lung tissue, and the correlation coefficient were - 0.662 (P0. 01) and - 0. 707 (P0. 01) respectively. Conclusion The administration of NAC appears to attenuate the injury to the lung after an exposure to UDMH and N2O4 in high concentration, and the antioxidant activity of NAC may he responsible for the protective effect." @default.
- W3147475275 created "2021-04-13" @default.
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- W3147475275 date "2004-01-01" @default.
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- W3147475275 title "Protective effect of N - acetylcysteine on acute lung injury caused by exposure to rocket liquid propellant" @default.
- W3147475275 hasPublicationYear "2004" @default.
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