Comparative health effects in mice of Libby amphibole asbestos and a fibrous amphibole from Arizona

被引:8
|
作者
Pfau, Jean C. [1 ]
Buck, Brenda [2 ]
Metcalf, Rodney V. [2 ]
Kaupish, Zoie [1 ]
Stair, Caleb [1 ]
Rodriguez, Maria [1 ]
Keil, Deborah E. [1 ]
机构
[1] Montana State Univ, Dept Microbiol & Immunol, Bozeman, MT 59717 USA
[2] Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA
关键词
Amphibole; Asbestos; Autoantibodies; Lung fibrosis; Pleural fibrosis; ENVIRONMENTAL EXPOSURE; RADIOGRAPHIC CHANGES; AUTOIMMUNE-DISEASE; MESOTHELIAL CELL; IN-VITRO; VERMICULITE; MONTANA; AUTOANTIBODIES; GEOLOGY; COHORT;
D O I
10.1016/j.taap.2017.08.022
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
This project developed from studies demonstrating that Libby Amphibole Asbestos (LAA) causes a non-typical set of health outcomes not generally reported for asbestos, including systemic autoimmunity and an unusual and devastating lamellar pleural thickening that progresses to severe pulmonary dysfunction and death. Further, mineral fiber mixtures with some similarities to LAA have recently been discovered in southern Nevada and northwestern Arizona, where the material exists in extensive recreational areas and is present in yards, roads, parking lots and school yards. The objective was to compare the health outcomes in mice exposed to either LAA or the fibrous amphiboles collected in Arizona at the Lake Mead National Recreational Area at very low doses to represent environmental exposures. In this study, the fibrous amphibole asbestos sample from Arizona (AzA) is composed of winchite (69%), actinolite (22%), and non-amphibole minerals (9%) and has a mean aspect ratio of 16.7 +/- 0.9. Fibrous amphibole asbestos from Libby (LAA) is composed of winchite (70%), richterite (9%), tremolite (5%), and non-amphibole minerals (16%) with a mean aspect ratio of 8.4 +/- 0.7. C57BL/6 mice were exposed by oropharyngeal aspiration to fiber suspensions at a very low dose of 3 mu g/mouse. After seven months, both LAA- and AzA-exposed mice had indices of chronic immune dysfunction related to a T(H)17 cytokine profile, with B cell activation, autoantibody production and proteinuria, suggesting kidney involvement. In addition, both exposures led to significant lung and pleural fibrosis. These data suggest that there is risk of pulmonary disease and autoimmune outcomes with environmental exposure to amphibole asbestos, and that this is not limited to Libby, Montana.
引用
收藏
页码:24 / 34
页数:11
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