Abstract:
:In three experiments, we have explored the uptake and transport of colloidal gold (Au) and iron oxide (Fe2O3) by normal and SO2-injured bronchial epithelium. In the first experiment, mice were exposed to a 2-hr aerosol of Au; in the second experiment, mice were exposed to SO2 (250 ppm) for 3 hr, then to Au; and in the third experiment, mice inhaled SO2 and then were exposed to Fe2O3. In each experiment, animals were killed at 0 hr, 1 day, and 4 days postexposure. From each animal, samples of large airways were examined by electron microscopy, and the cell type and particle location were recorded. Au was not readily taken up by the bronchial epithelium in that only two cells out of 1162 contained particles. No Au was seen in the submucosa. Exposure to SO2 produced a mild, but nonnecrotic response characterized by an increase in mucus, vacuolated cells, detached cilia, and an influx of polymorphonuclear leukocytes. SO2 did not affect the uptake of Au; 2 out of 1177 epithelial cells contained Au. However, gold did reach the submucosa. Results from the SO2 plus Fe2O3 experiment were compared to a previous study of similar design in which mice were exposed only to Fe2O3. SO2 increased the uptake of iron and affected the distribution of intracellular iron among the different cell types. It is possible that increased iron uptake is due to either injury or to changes in particle solubility produced by the SO2.
journal_name
Exp Lung Resjournal_title
Experimental lung researchauthors
Watson AY,Brain JDdoi
10.3109/01902148009057514subject
Has Abstractpub_date
1980-03-01 00:00:00pages
67-87issue
1eissn
0190-2148issn
1521-0499journal_volume
1pub_type
杂志文章abstract::Because high partial pressures of oxygen (O2) can cause peroxidative cleavage of membrane lipids, it is plausible to hypothesize that hyperoxia alters the physical state and composition of lipids in the membranes of pulmonary endothelial cells and that manipulation of the lipid profile may modify endothelial cell tole...
journal_title:Experimental lung research
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journal_title:Experimental lung research
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journal_title:Experimental lung research
pub_type: 杂志文章
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journal_title:Experimental lung research
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journal_title:Experimental lung research
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journal_title:Experimental lung research
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journal_title:Experimental lung research
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更新日期:1983-09-01 00:00:00
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