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Quantitative assessment of elemental carbon in the lungs of never smokers, cigarette smokers, and coal miners.

Authors
Saxena-RK; McClure-ME; Hays-MD; Green-FHY; McPhee-LJ; Vallyathan-V; Gilmour-MI
Source
J Toxicol Environ Health, A 2011 May; 74(11):706-715
NIOSHTIC No.
20038632
Abstract
Inhalation exposure to particulates such as cigarette smoke and coal dust is known to contribute to the development of chronic lung disease. The purpose of this study was to estimate the amount of elemental carbon (EC) deposits from autopsied lung samples from cigarette smokers, miners, and control subjects and explore the relationship between EC level, exposure history, and the extent of chronic lung disease. The samples comprised three subgroups representing never smokers (8), chronic cigarette smokers (26), and coal miners (6). Following the dissolution of lung tissue, the extracted EC residue was quantified using a thermal-optical transmission (TOT) carbon analyzer. Mean EC levels in the lungs of the control group were 56.68 +/- 24.86 (SD) g/g dry lung weight. Respective mean EC values in lung samples from the smokers and coal miners were 449.56 +/- 320.3 g/g and 6678.2 +/- 6162 g/g. These values were significantly higher than those obtained from the never-smoker group. EC levels in the lung and pack-years of cigarette smoking correlated significantly, as did EC levels and the severity of small airway disease. This study provides one of the first quantitative assessments of EC in human lungs from populations at high relative risk for the development of chronic lung disease.
Keywords
Respiratory-system-disorders; Inhalation-studies; Particulate-dust; Particulates; Smoking; Coal-dust; Exposure-assessment; Autopsies; Quantitative-analysis; Lung; Lung-cells; Lung-tissue; Miners; Coal-miners; Humans; Lung-disease; Chronic-exposure
Contact
M. Ian Gilmour, PhD, Cardiopulmonary and Immunotoxicology Branch, Environmental Public Health Division, MD: B143-04, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711
CODEN
JTEHD6
CAS No.
7440-44-0
Publication Date
20110501
Document Type
Journal Article
Email Address
gilmour.ian@epa.gov
Funding Type
Contract
Fiscal Year
2011
NTIS Accession No.
NTIS Price
Issue of Publication
11
ISSN
1528-7394
NIOSH Division
HELD
Source Name
Journal of Toxicology and Environmental Health, Part A: Current Issues
State
NC; WV
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