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Title: Mineralogic correlates of fibrosis in chrysotile miners and millers

Abstract

To determine which mineral parameters relate to the degree of interstitial fibrosis (asbestosis) in the lungs of chrysotile miners and millers, we graded fibrosis histologically and correlated fibrosis grades with fiber concentration and mean size, surface area, and mass, and with total sample fiber length, surface area, and mass in 21 cases. A positive correlation of fibrosis grade with tremolite concentration and a lesser correlation with chrysotile concentration was found for whole lungs, specific sites within lungs, and, for tremolite, single microscopic fields. No correlations were found for measures of chrysotile fiber size, surface area, or mass, but tremolite mean fiber length, aspect ratio, and surface area were, surprisingly, negatively correlated with fibrosis grade. Measures based on total rather than on mean case or site parameters failed to show correlations with fibrosis. We conclude that: (1) degree of pulmonary fibrosis reflects fiber concentration at both a bulk and a microscopic level; (2) mean fiber length and parameters related to mean fiber length also correlate with fibrosis grade, but, contrary to predictions from animal studies, this correlation is negative, suggesting that short fibers may be more important in the genesis of pulmonary fibrosis than is commonly believed; (3) there is nomore » evidence that parameters such as total fiber length, surface area, or mass provide predictors of degree of fibrosis.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of British Columbia, Vancouver (Canada)
OSTI Identifier:
6146512
Resource Type:
Journal Article
Journal Name:
Am. Rev. Respir. Dis.; (United States)
Additional Journal Information:
Journal Volume: 139:4; Journal Issue: 4
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; ASBESTOS; TOXICITY; LUNGS; FIBROSIS; RESPIRATORY SYSTEM DISEASES; EPIDEMIOLOGY; ELECTRON MICROSCOPY; MINING; OCCUPATIONAL DISEASES; OCCUPATIONAL EXPOSURE; PARTICLE SIZE; SURFACE AREA; BODY; DISEASES; MICROSCOPY; ORGANS; PATHOLOGICAL CHANGES; RESPIRATORY SYSTEM; SIZE; SURFACE PROPERTIES; 560300* - Chemicals Metabolism & Toxicology

Citation Formats

Churg, A., Wright, J.L., DePaoli, L., and Wiggs, B. Mineralogic correlates of fibrosis in chrysotile miners and millers. United States: N. p., 1989. Web. doi:10.1164/ajrccm/139.4.891.
Churg, A., Wright, J.L., DePaoli, L., & Wiggs, B. Mineralogic correlates of fibrosis in chrysotile miners and millers. United States. doi:10.1164/ajrccm/139.4.891.
Churg, A., Wright, J.L., DePaoli, L., and Wiggs, B. Sat . "Mineralogic correlates of fibrosis in chrysotile miners and millers". United States. doi:10.1164/ajrccm/139.4.891.
@article{osti_6146512,
title = {Mineralogic correlates of fibrosis in chrysotile miners and millers},
author = {Churg, A. and Wright, J.L. and DePaoli, L. and Wiggs, B.},
abstractNote = {To determine which mineral parameters relate to the degree of interstitial fibrosis (asbestosis) in the lungs of chrysotile miners and millers, we graded fibrosis histologically and correlated fibrosis grades with fiber concentration and mean size, surface area, and mass, and with total sample fiber length, surface area, and mass in 21 cases. A positive correlation of fibrosis grade with tremolite concentration and a lesser correlation with chrysotile concentration was found for whole lungs, specific sites within lungs, and, for tremolite, single microscopic fields. No correlations were found for measures of chrysotile fiber size, surface area, or mass, but tremolite mean fiber length, aspect ratio, and surface area were, surprisingly, negatively correlated with fibrosis grade. Measures based on total rather than on mean case or site parameters failed to show correlations with fibrosis. We conclude that: (1) degree of pulmonary fibrosis reflects fiber concentration at both a bulk and a microscopic level; (2) mean fiber length and parameters related to mean fiber length also correlate with fibrosis grade, but, contrary to predictions from animal studies, this correlation is negative, suggesting that short fibers may be more important in the genesis of pulmonary fibrosis than is commonly believed; (3) there is no evidence that parameters such as total fiber length, surface area, or mass provide predictors of degree of fibrosis.},
doi = {10.1164/ajrccm/139.4.891},
journal = {Am. Rev. Respir. Dis.; (United States)},
number = 4,
volume = 139:4,
place = {United States},
year = {1989},
month = {4}
}