Abstract:
:The normal mucociliary epithelium of the respiratory tract in chronic cigarette smokers often is replaced focally by a metaplastic squamous epithelium. Because asbestos workers who smoke have a substantially greater risk of bronchogenic carcinoma than nonsmokers, we hypothesized that interaction of asbestos with squamous epithelium might be a contributing factor. To address this question, an in vitro model was developed to study the interaction of asbestos with both mucociliary and squamous epithelium. Explants of tracheas from hamsters were cultured in either a chemically defined minimal essential medium, which maintains a differentiated epithelium, or a nutritionally complex medium, which encourages the development of squamous metaplasia. Scanning electron microscopy (SEM) was used to measure quantitatively the development of a squamous epithelial surface on the explants. The interaction of chrysotile and crocidolite asbestos with cells of the mucociliary and squamous epithelium was studied using both SEM and transmission electron microscopy (TEM). Long fibers of asbestos were cleared, whereas shorter fibers were phagocytized by cells of the mucociliary epithelium. In contrast, asbestos was phagocytized by superficial squamous cells regardless of fiber length, and fibers penetrated between intercellular junctions in the metaplastic epithelium. The relevance of these interactions to the induction of bronchogenic carcinoma is discussed.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Woodworth CD,Mossman BT,Craighead JEdoi
10.1289/ehp.835127subject
Has Abstractpub_date
1983-09-01 00:00:00pages
27-33eissn
0091-6765issn
1552-9924journal_volume
51pub_type
杂志文章abstract::Epidemiologic studies report associations between particulate air pollution and cardiopulmonary morbidity and mortality. Although the underlying pathophysiologic mechanisms remain unclear, it has been hypothesized that altered autonomic function and pulmonary/systemic inflammation may play a role. In this study we exp...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.6588
更新日期:2004-03-01 00:00:00
abstract::During the last three decades, the use of modern organic synthetic pesticides has increased about 40-fold. Total U.S. production, for domestic and expert use, in 1976 was about 1.4 million pounds. Crops receiving the most intensive application of various pesticides were cotton for insecticides, corn for herbicides, an...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7827103
更新日期:1978-12-01 00:00:00
abstract:BACKGROUND:Ocean pollution affects marine organisms and ecosystems as well as humans. The International Oceanographic Commission recommends ocean health monitoring programs to investigate the presence of marine contaminants and the health of threatened species and the use of multiple and early-warning biomarker approac...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0901809
更新日期:2011-03-01 00:00:00
abstract:BACKGROUND:Environmental heat exposure is a public health concern. The impacts of environmental heat on mortality and morbidity at the population scale are well documented, but little is known about specific exposures that individuals experience. OBJECTIVES:The first objective of this work was to catalyze discussion o...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP556
更新日期:2017-08-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8564219
更新日期:1985-12-01 00:00:00
abstract:BACKGROUND:The pesticide atrazine does not bind to or activate the classical estrogen receptor (ER), but it up-regulates the aromatase activity in estrogen-sensitive tumor cells. The G protein estrogen receptor (GPR30/GPER) has been reported to be involved in certain biological responses to endogenous estrogens and env...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1408586
更新日期:2015-05-01 00:00:00
abstract:SUMMARY:From climate change to hydraulic fracturing, and from drinking water safety to wildfires, environmental challenges are changing. The United States has made substantial environmental protection progress based on media-specific and single pollutant risk-based frameworks. However, today’s environmental problems ar...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/EHP1465
更新日期:2017-03-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9337
更新日期:2006-10-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.00108s5769
更新日期:2000-10-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.961041353
更新日期:1996-12-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.5603
更新日期:2003-03-01 00:00:00
abstract::The in vivo effects of xenoestrogens are of interest in relation to their potential health risks and/or beneficial effects on humans and animals. However, the apparent in vivo potency of the examined response can be confounded by a short half-life, and the metabolism of estrogens is very dependent on the nature of con...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9810623
更新日期:1998-01-01 00:00:00
abstract::Metallothioneins (MTs) are encoded by a multigene family in man. We have isolated those genes and analyzed the structure of some of them. The MT-II variant is encoded by a single functional gene: MT-IIA. The MT-IIB gene is a processed pseudogene derived from a reverse transcript of MT-II mRNA. On the other hand, the M...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8454111
更新日期:1984-03-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.94102s369
更新日期:1994-09-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7616119
更新日期:1976-08-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7908
更新日期:2005-08-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.782487
更新日期:1978-06-01 00:00:00
abstract::The mammalian respiratory tract is densely innervated by autonomic and sensory nerves around airways and blood vessels. Subsets of these nerves contain a number of putative neurotransmitter peptides, such as substance P and calcitonin gene-related peptide (CGRP) in sensory nerves and vasoactive intestinal polypeptide ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.85-1568331
更新日期:1990-04-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP119
更新日期:2017-03-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.101-1521117
更新日期:1993-10-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.6804
更新日期:2004-05-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8878119
更新日期:1988-06-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1408535
更新日期:2015-05-01 00:00:00
abstract::The Centers for Disease Control and Prevention recommend that local public health agencies use local data to identify children at risk for lead exposure to ensure that they receive preventive services. The objective of this study was to demonstrate the usefulness of a geographic information system (GIS) in identifying...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0110989
更新日期:2001-01-01 00:00:00
abstract::Our work has focused on the determination of physiological traits that may facilitate in situ degradation of xenobiotic compounds by indigenous microorganisms. For this our interests center on the following questions: What are the ambient conditions in a benzene, toluene, ethylbenzene, and xylene (BTEX)-contaminated a...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.95103s449
更新日期:1995-06-01 00:00:00
abstract::Antisera elicited in rabbits were used in radioimmunoassay (RIA) and enzyme-linked immunosorbent assay (ELISA) to determine femtomole quantities of deoxyguanosin-(8-yl)-acetylaminofluorene (dg-8-AAF) and deoxyguanosin-(8-yl)-aminofluorene (dg-8-AF). These adducts have been monitored in liver and kidney DNA of male Wis...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.834993
更新日期:1983-03-01 00:00:00
abstract:BACKGROUND:The Love Canal is a rectangular 16-acre, 10-ft deep chemical waste landfill situated in a residential neighborhood in Niagara Falls, New York. This seriously contaminated site first came to public attention in 1978. No studies have examined mortality in the former residents of the Love Canal neighborhood (LC...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.11350
更新日期:2009-02-01 00:00:00
abstract::Organophosphate (OP) pesticides are commonly used in the United States, and farmworkers are at risk for chronic exposure. Using a sample of 218 farmworkers in 24 communities and labor camps in eastern Washington State, we examined the association between agricultural crop and OP pesticide metabolite concentrations in ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8620
更新日期:2006-07-01 00:00:00
abstract::The last decade has marked a radical change in the business of sustainability, say environmental activists and industrialists alike. On the wane are "greenwashing" campaigns in which corporations promote dubious environmental accomplishments to draw attention away from environmentally damaging practices. On the rise a...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.110-a142
更新日期:2002-03-01 00:00:00
abstract::Uranium accumulates in bone, affects bone metabolism in laboratory animals, and when ingested in drinking water increases urinary excretion of calcium and phosphate, important components in the bone structure. However, little is known about bone effects of ingested natural uranium in humans. We studied 146 men and 142...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7475
更新日期:2005-01-01 00:00:00