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首页> 外文期刊>The Journal of toxicological sciences >Early changes to oxidative stress levels following exposure to formaldehyde in ICR mice
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Early changes to oxidative stress levels following exposure to formaldehyde in ICR mice

机译:ICR小鼠接触甲醛后氧化应激水平的早期变化

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Formaldehyde (FA) is a commonly used chemical in everyday life and can react with many molecules in the human body. Although toxicity has been reported, exposure to FA has also been shown to have beneficial effects or no effect at all. In the present study, we examined the effect of FA inhalation on oxidative stress and inflammation in mice. Male adult ICR mice were exposed FA in gaseous form (0.1 ppm), and blood, urine, brain, lung and liver were obtained for 24 hr. Levels of 8-hydroxy-2'-deoxyguanosine (8OHdG) and NO3- were then determined by HPLC. A second group of mice were injected with 5 mg/kg lipopolysaccharide (LPS) after 24 hr of FA (3 ppm) inhalation and blood and organs were assayed for NO3- level and SOD activity. After exposure to a low dose of FA (0.1 ppm), the 8OHdG/dG ratio significantly increased in plasma. However, the ratio in urine and organs significantly decreased during 24 hr of FA exposure. The NO3- levels mirrored the 8OHdG/dG ratio. After 24 hr exposure to a high dose of FA (3 ppm), NO3- levels in plasma and liver were significantly lower than in control mice exposed to air only. The SOD activity of blood and urine were conversely increased in FA exposed animals. In the present study, we suggest that inhalation of FA at low doses influences the oxidative stress response in a tissue-specific manner. The FA may partially alleviate in some tissues like preconditioning in oxidative stress.
机译:甲醛(FA)是日常生活中常用的化学物质,可与人体中的许多分子发生反应。尽管已经报道了毒性,但暴露于FA也已显示出有益作用或完全没有作用。在本研究中,我们检查了FA吸入对小鼠氧化应激和炎症的影响。雄性成年ICR小鼠以气态(0.1 ppm)暴露于FA,并获得血液,尿液,脑,肺和肝24小时。然后通过HPLC测定8-羟基-2'-脱氧鸟苷(8OHdG)和NO 3 -的水平。吸入FA(3 ppm)24小时后,向第二组小鼠注射5 mg / kg脂多糖(LPS),并检测血液和器官中的NO 3 -水平和SOD活性。暴露于低剂量的FA(0.1 ppm)后,血浆中的8OHdG / dG比值显着增加。但是,FA暴露24小时后尿液和器官中的比例显着下降。 NO 3 -水平反映了8OHdG / dG的比率。暴露于高剂量FA(3 ppm)24小时后,血浆和肝脏中NO 3 -的水平显着低于仅暴露于空气的对照小鼠。相反,暴露于FA的动物血液和尿液的SOD活性增加。在本研究中,我们建议低剂量吸入FA以组织特异性方式影响氧化应激反应。 FA可以在某些组织中部分缓解,例如在氧化应激中进行预处理。

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