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DOI10.3109/08958378.2014.908330
Iron decreases biological effects of ozone exposure
Ghio, Andrew J.1; Soukup, Joleen M.1; Dailey, Lisa A.1; Richards, Judy H.1; Duncan, Kelly E.2; Lehmann, James1
发表日期2014-06-01
ISSN0895-8378
卷号26期号:7页码:391-399
英文摘要

Context: Ozone (O-3) exposure is associated with a disruption of iron homeostasis and increased availability of this metal which potentially contributes to an oxidative stress and biological effects.


Objective: We tested the postulate that increased concentrations of iron in cells, an animal model and human subjects would significantly impact the biological effects of O-3 exposure.


Results: Exposure to 0.4 ppm O-3 for 5 h increased mRNA for both Superoxide Dismutase-1 (SOD1) and Cyclooxygenase-2 (COX2) in normal human bronchial epithelial (NHBE) cells. Pre-treatment of NHBE cells with 200 mu M ferric ammonium citrate (FAC) for 4 h diminished changes in both SOD1 and COX2 following O-3 exposure. mRNA transcript levels and associated protein release of the pro-inflammatory mediators IL-6 and IL-8 were increased by O-3 exposure of NHBE cells; changes in these endpoints after O-3 exposure were significantly decreased by FAC pre-treatment of the cells. Exposure of CD-1 mice to 2 ppm O-3 for 3 h significantly increased lavage indices of inflammation and airflow limitation. Pre-treatment of the animals with pharyngeal aspiration of FAC diminished the same endpoints. Finally, the mean loss of pulmonary function in 19 healthy volunteers exposed to 0.3ppm O-3 for 2 h demonstrated significant correlations with either their pre-exposure plasma ferritin or iron concentrations.


Discussion and conclusion: We conclude that greater availability of iron after O-3 exposure does not augment biological effects. On the contrary, increased available iron decreases the biological effects of O-3 exposure in cells, animals and humans.


英文关键词Air pollution;ferritin;free radicals;lung diseases;oxidants
语种英语
WOS记录号WOS:000336387800003
来源期刊INHALATION TOXICOLOGY
来源机构美国环保署
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/58257
作者单位1.US EPA, Natl Hlth & Environm Effects Res Lab, Off Res & Dev, Res Triangle Pk, NC 27711 USA;
2.Univ N Carolina, Ctr Environm Med Asthma & Lung Biol, Chapel Hill, NC USA
推荐引用方式
GB/T 7714
Ghio, Andrew J.,Soukup, Joleen M.,Dailey, Lisa A.,et al. Iron decreases biological effects of ozone exposure[J]. 美国环保署,2014,26(7):391-399.
APA Ghio, Andrew J.,Soukup, Joleen M.,Dailey, Lisa A.,Richards, Judy H.,Duncan, Kelly E.,&Lehmann, James.(2014).Iron decreases biological effects of ozone exposure.INHALATION TOXICOLOGY,26(7),391-399.
MLA Ghio, Andrew J.,et al."Iron decreases biological effects of ozone exposure".INHALATION TOXICOLOGY 26.7(2014):391-399.
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