Abstract:
:Isolated rat and human hepatocytes in primary culture were shown to metabolize AAF to reactive intermediates which damaged hepatocyte DNA. A significant increase in unscheduled DNA synthesis was detectable by autoradiography in rat and human hepatocytes exposed to concentrations of AAF as low as 1 microM. When rat hepatocytes were plated over confluent monolayers of human fibroblasts and exposed to 3H-AAF, significant binding of AAF to the DNA of the fibroblasts as well as the hepatocytes was measured. In other experiments with hepatocyte-fibroblast cocultures, nonradioactive AAF, at concentrations greater than 40 microM, induced a significant increase in the HPRT- mutation frequency in the human fibroblasts. These results demonstrate that hepatocytes can be used to assess genotoxicity of carcinogenic compounds and are useful for interspecies comparisons in chemical carcinogenesis.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Strom SC,Jirtle RL,Michalopoulos Gdoi
10.1289/ehp.8349165subject
Has Abstractpub_date
1983-03-01 00:00:00pages
165-70eissn
0091-6765issn
1552-9924journal_volume
49pub_type
杂志文章abstract::In the aquatic environment, diet is an important route of exposure for the common contaminant and procarcinogen benzo(a)pyrene (BaP). Dietary organisms vary in their BaP content and in contaminated areas often contain other xenobiotics including cytochrome P4501A inducers. This study examined the effect of dose and pr...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.98106155
更新日期:1998-03-01 00:00:00
abstract::Perchlorate (ClO4-) has been detected in groundwater sources in numerous communities in California and other parts of the United States, raising concerns about potential impacts on health. For California communities where ClO4- was tested in 1997 and 1998, we evaluated the prevalence of primary congenital hypothyroidi...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8176
更新日期:2006-05-01 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
abstract:BACKGROUND:In the 1990s, the mercury-based preservative thimerosal was used in most pediatric vaccines. Although there are currently only two thimerosal-containing vaccines (TCVs) recommended for pediatric use, parental perceptions that vaccines pose safety concerns are affecting vaccination rates, particularly in ligh...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1408257
更新日期:2015-06-01 00:00:00
abstract::Mammalian cells in culture have been used to study the genetic effects of physical and chemical agents. We have used Chinese hamster ovary (CHO) cells, clone K1-BH4, to quantify mutations at the X-linked, large (35 kb) hypoxanthine-guanine phosphoribosyltransferase (hprt) locus (the CHO/HPRT assay) induced by environm...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.93101s3213
更新日期:1993-10-01 00:00:00
abstract::[This corrects the article DOI: 10.1289/EHP2580.]. ...
journal_title:Environmental health perspectives
pub_type: 杂志文章,已发布勘误
doi:10.1289/EHP4002
更新日期:2018-07-05 00:00:00
abstract:BACKGROUND:Evidence suggests that cardiovascular effects of air pollution are mediated by inflammation and that air pollution can induce genetic expression of the interleukin-6 gene (IL6). OBJECTIVES:We investigated whether IL6 and fibrinogen gene variants can affect plasma IL-6 responses to air pollution in patients ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0800370
更新日期:2009-09-01 00:00:00
abstract::The X-ray crystallographic structural determinations of synthetic estrogens and antiestrogens provide reliable information on the global minimum energy conformation of these molecules or a local minimum energy conformation that is within 1 or 2 kcal/mole of the global minimum. In favorable cases, state-of-the-art mole...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.8561111
更新日期:1985-09-01 00:00:00
abstract::Environmental chemicals that function as estrogens have been suggested to be associated with an increase in disease and dysfunctions in animals and humans. To characterize chemicals that may act as estrogens in humans, we have compared three in vitro assays which measure aspects of human estrogen receptor (hER)-mediat...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.961041084
更新日期:1996-10-01 00:00:00
abstract::The identification of certain organic compounds in drinking water has led water treatment specialists to be increasingly concerned about the eventual risks of such pollutants to the health of consumers. Our experiments focused on the role of ozone and granular activated carbon in removing mutagenic compounds and precu...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8669159
更新日期:1986-11-01 00:00:00
abstract::This paper summarizes the themes and recommendations that emerge from the papers presented by the Working Group on Tropospheric Ozone. In terms of current knowledge, the following are considered of particular importance: a) lack of clear evidence for a human analogue of the terminal bronchiolar and proximal acinar cha...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.93101s4237
更新日期:1993-12-01 00:00:00
abstract:BACKGROUND:Methylmercury (MeHg) may affect fetal growth; however, prior research often lacked assessment of mercury speciation, confounders, and interactions. OBJECTIVE:Our objective was to assess the relationship between MeHg and fetal growth as well as the potential for confounding or interaction of this relationshi...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1408596
更新日期:2016-03-01 00:00:00
abstract:BACKGROUND:Polybrominated diphenyl ethers (PBDEs) have been used as flame retardants and are becoming a ubiquitous environmental contaminant. Adverse effects in the developing brain are of great health concern. OBJECTIVE:We investigated the effect of PBDEs/hydroxylated PBDEs (OH-PBDEs) on thyroid hormone (TH) receptor...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1002065
更新日期:2011-02-01 00:00:00
abstract::Previously we have demonstrated that several xenobiotics can induce multidrug (mdr) gene expression in cultures of primary isolated hepatocytes. One of the best of these xenobiotic inducers in rat hepatocytes is 2-acetylaminofluorene (2-AAF), which induces mdr expression by an enhancement of mdr gene transcription. In...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.94102s6209
更新日期:1994-10-01 00:00:00
abstract:BACKGROUND:Particulate matter ≤ 2.5 μm in aerodynamic diameter (PM2.5) has been consistently associated with preterm birth (PTB) to varying degrees, but roles of PM2.5 species have been less studied. OBJECTIVE:We estimated risk differences (RD) of PTB (reported per 106 pregnancies) associated with change in ambient co...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1408953
更新日期:2015-10-01 00:00:00
abstract:BACKGROUND:In an effort to decrease the rates of smoking conventional tobacco cigarettes, electronic cigarettes (e-cigarettes) have been proposed as an effective smoking cessation tool. However, little is known about their toxicological impacts. This is concerning given that e-cigarette use is perceived as less harmful...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP6067
更新日期:2020-04-01 00:00:00
abstract::The methylation of specific cytosine residues in DNA has been implicated in regulating gene expression and facilitating functional specialization of cellular phenotypes. Generally, the demethylation of certain CpG sites correlates with transcriptional activation of genes. 5-Azacytidine is an inhibitor of DNA methylati...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8980189
更新日期:1989-03-01 00:00:00
abstract::Organochlorines are persistent lipophilic compounds that accumulate in Inuit people living in circumpolar countries. Organochlorines accumulate as a result of the Inuits' large consumption of sea mammal fat; however, available data are limited to blood lipids, milk fat, and adipose tissue. We report results of organoc...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.99107823
更新日期:1999-10-01 00:00:00
abstract::Background: Drinking water from natural sources in coastal Bangladesh has become contaminated by varying degrees of salinity due to saltwater intrusion from rising sea levels, cyclone and storm surges and upstream withdrawal of freshwater. Objective: Our objective was to estimate salt intake from drinking water source...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1002804
更新日期:2011-04-12 00:00:00
abstract::Millions of people worldwide are exposed to arsenic-contaminated drinking water, and ingestion of inorganic arsenic (InAs) has been associated with increased risks of cancer. The primary metabolic pathway of ingested InAs is methylation to monomethyl arsenic (MMA) and dimethyl arsenic (DMA). However, people vary great...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7907
更新日期:2005-09-01 00:00:00
abstract::Among the issues dealing with identifying potential adverse immunologic effects (i.e., suppression, hypersensitivity, or autoimmunity) associated with xenobiotic exposure, general agreement exists among the regulatory and pharmaceutical communities that predictive tests for autoimmunity are in most need of development...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.99107s5679
更新日期:1999-10-01 00:00:00
abstract:BACKGROUND:The National Institutes of Health's Environmental influences on Child Health Outcomes (ECHO) initiative aims to understand the impact of environmental factors on childhood disease. Over 40,000 chemicals are approved for commercial use. The challenge is to prioritize chemicals for biomonitoring that may prese...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP5133
更新日期:2019-12-01 00:00:00
abstract::Studies on the fate of 14C-labeled vinyl chloride (VC) following oral administration and inhalation exposure in rats demonstrated that the disposition of VC in the body is a function of the dose. More importantly, from the data available, it appears that a correlation exists between doses of VC which cause tumors and ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7617145
更新日期:1976-10-01 00:00:00
abstract:BACKGROUND:Evidence indicates that air pollution contributes to cardiopulmonary mortality. There is ongoing debate regarding the size and shape of the pollution–mortality exposure–response relationship. There are also growing appeals for estimates of pollution–mortality relationships that use public data and are based ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP4438
更新日期:2019-07-01 00:00:00
abstract:BACKGROUND:Air pollution exposure increases cardiovascular morbidity and mortality and is a major global public health concern. OBJECTIVES:We investigated the benefits of reducing personal exposure to urban air pollution in patients with coronary heart disease. METHODS:In an open randomized crossover trial, 98 patien...
journal_title:Environmental health perspectives
pub_type: 杂志文章,随机对照试验
doi:10.1289/ehp.1103898
更新日期:2012-03-01 00:00:00
abstract:BACKGROUND:Exposure to air pollution has been associated with higher C-reactive protein (CRP) levels, suggesting an inflammatory response. Not much is known about this association in pregnancy. OBJECTIVES:We investigated the associations of air pollution exposure during pregnancy with maternal and fetal CRP levels in ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1104345
更新日期:2012-05-01 00:00:00
abstract::The chlorinated hydrocarbons chloroform (CHCl3), 1,1-dichlorethane (1,1-DCE) and 1,2-dichloroethane (1,2-DCE) have been detected in finished drinking water. When administered to B6C3F1 mice by gavage in corn oil, these compounds have been shown to induce hepatic tumors. The present study examines the effect on liver t...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.866989
更新日期:1986-11-01 00:00:00
abstract:BACKGROUND:Exposure to perfluorooctane sulfonic acid (PFOS) or to perfluorooctanoic acid (PFOA) increases mouse and human peroxisome proliferator-activated receptor alpha (PPARα) subtype activity, which influences lipid metabolism. Because cholesterol is the substrate from which testosterone is synthesized, exposure to...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1408847
更新日期:2015-12-01 00:00:00
abstract:BACKGROUND:The widespread use of organophosphorus (OP) pesticides has led to frequent exposure in adults and children. Because such exposure may cause adverse health effects, particularly in children, the sources and patterns of exposure need to be studied further. OBJECTIVES:We assessed young urban/suburban children'...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.10912
更新日期:2008-04-01 00:00:00
abstract::The subchronic inhalation toxicology of ethylene glycol monoethyl ether (EGEE) was evaluated in rats and rabbits using a 13-week exposure regimen. Groups of 20 rabbits (10 M, 10 F) and 30 rats (15 M, 15 F) were exposed to a vapor of 25 ppm, 100 ppm, or 400 ppm, 6 hr/day, 5 days/week. The control groups received air on...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8457157
更新日期:1984-08-01 00:00:00