Abstract:
:In an attempt to elucidate the relationship between DNA adduct formation and tumorigenesis, DNA adducts were measured in the livers and bladders of mice during chronic exposure to several different doses of 2-acetylaminofluorene (2-AAF) and 4-aminobiphenyl (4-ABP). Continuous oral administration of these compounds for 4 weeks produced an increase in DNA adduct formation during the first 2 weeks, followed by a plateau, which presumably occurred because the rate of adduct removal offset the rate of adduct formation. The quantity of DNA adducts present at equilibrium correlated directly with the carcinogen concentration; therefore, when exposure was continued for 4 weeks, DNA adducts that reflected the plateau level at each dose could be expressed as a function of dose. Liver and bladder DNA adduct profiles thus obtained during administration of multiple doses of 2-AAF (to female mice) and 4-ABP (to male and female mice) were compared to profiles for tumor incidences obtained during lifetime exposures to the same doses. These experiments demonstrated similar profiles for DNA adduct formation and tumorigenesis in liver. In the bladder, DNA adducts were linear, but tumors only appeared at the higher doses in conjunction with cell proliferation. In addition to these aromatic amines, similar data are available for aflatoxin B1, diethylnitrosamine, and (methylnitrosamino)-1-(3-pyridyl)-1-butanone (also known as nicotine-derived nitrosoketone). Of the nine different biological situations (carcinogen/species/sex/organ) for which data are available, correlations between steady-state DNA adduct levels and tumorigenic response at the different doses were linear in five of the nine biological models.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Poirier MC,Beland FAdoi
10.1289/ehp.94102s6161subject
Has Abstractpub_date
1994-10-01 00:00:00pages
161-5eissn
0091-6765issn
1552-9924journal_volume
102 Suppl 6pub_type
杂志文章,评审abstract::To study the effect of processing on polybrominated biphenyl (PBB) levels, milk from four dairy herds containing less than 0.3 ppm (fat basis) of physiologically incorporated PBBs was presented individually into cream, skim milk, butter, and stirred curd cheese. Pasteurized and freeze-dried whole milk, skim milk, and ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.782337
更新日期:1978-04-01 00:00:00
abstract::Polychlorinated biphenyls (PCBs) are widespread, low-level environmental pollutants associated with adverse health effects such as immune suppression and teratogenicity. There is increasing evidence that some PCB compounds are capable of disrupting reproductive and endocrine function in fish, birds, and mammals, inclu...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.94102780
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.02110411
更新日期:2002-04-01 00:00:00
abstract::Occupational cancer research methods was identified in 1996 as 1 of 21 priority research areas in the National Occupational Research Agenda (NORA). To implement NORA, teams of experts from various sectors were formed and given the charge to further define research needs and develop strategies to enhance or augment res...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.111-1241299
更新日期:2003-01-01 00:00:00
abstract::Attention has been focussed, both in man and experimental animals, on the effects of inhalation of the gas monomer, vinyl chloride. Recently, note is being taken of the possible effects of the inhalation of the polymer in man. The particles in question are those produced commercially as paste polymer or dispersion pol...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.814183
更新日期:1981-10-01 00:00:00
abstract::The nasal cavity is susceptible to chemically induced injury as a result of exposure to inhaled irritants. Some responses of the nasal mucosa to inhaled toxicants are species specific. These species-related differences in response may be due to variations in structural, physiologic, and biochemical factors, such as gr...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.85-1568334
更新日期:1990-04-01 00:00:00
abstract:BACKGROUND:Cancer may be a stem cell (SC)-based disease involving formation of cancer SCs (CSCs) potentially arising from transformation of normal SCs. Cadmium has been linked to human pancreatic cancer. OBJECTIVE:We studied cadmium exposure of human pancreatic ductal epithelial (HPDE) cells and whether SCs may be tar...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1205082
更新日期:2012-09-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8979173
更新日期:1989-02-01 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
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.101-1521140
更新日期:1993-10-01 00:00:00
abstract::The current Good Manufacturing Practice (cGMP) and effluent emission (use and disposal) regulations of the U.S. Food and Drug Administration (FDA) and manufacturing effluent discharge and emission regulations of the U.S. Environmental Protection Agency (U.S. EPA) require contained manufacture, use, and disposal of pha...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.02110213
更新日期:2002-03-01 00:00:00
abstract:BACKGROUND:Cumulative lead exposure is associated with a widened pulse pressure (PP; the -difference between systolic and diastolic blood pressure), a marker of arterial stiffness and a predictor of cardiovascular disease. Polymorphisms in the hemochromatosis gene (HFE) have been shown to modify the impact of cumulativ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1002251
更新日期:2010-09-01 00:00:00
abstract::We report the results of a coordinated mitigation effort aimed at reducing arsenic (As) exposure in three counties of Guizhou province, China. Mitigation occurred in 2005 and encompassed 21 villages with 47,000 inhabitants, who were exposed to high levels of As in their diet through consumption of As-contaminated chil...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9273
更新日期:2007-04-01 00:00:00
abstract:OBJECTIVES:There are some common occupational agents and exposure circumstances for which evidence of carcinogenicity is substantial but not yet conclusive for humans. Our objectives were to identify research gaps and needs for 20 agents prioritized for review based on evidence of widespread human exposures and potenti...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.0901828
更新日期:2010-10-01 00:00:00
abstract:BACKGROUND:Ubiquitous polycyclic aromatic hydrocarbons (PAHs) have been shown to alter gene expression patterns and elevate micronuclei (MN) frequency, but the underlying mechanisms are largely unknown. MicroRNAs (miRNAs) are key gene regulators that may be influenced by PAH exposures and mediate their effects on MN fr...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1307080
更新日期:2014-07-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.96104s2331
更新日期:1996-04-01 00:00:00
abstract:OBJECTIVE:The goal of this study was to identify mental, behavioral, and cognitive disorders that may be triggered or exacerbated during heat waves, predisposing individuals to heat-related morbidity and mortality. DESIGN:Using health outcome data from Adelaide, South Australia, for 1993-2006, we estimated the effect ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.11339
更新日期:2008-10-01 00:00:00
abstract:BACKGROUND:Although adverse effects of high temperature on mortality have been studied extensively in urban areas, little is known of the heat-mortality associations outside of cities. OBJECTIVE:We investigated whether heat-mortality associations differed between urban and nonurban areas and how urbanicity affected th...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP204
更新日期:2016-12-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8231
更新日期:2005-12-01 00:00:00
abstract::The mutagenic activities of several phthalate esters have been evaluated in an 8-azaguanine resistance assay in Salmonella typhimurium. Three phthalate esters were found to be mutagenic: dimethyl phthalate, diethyl phthalate and di-n-butyl phthalate. A number of other phthalate esters were not found to be mutagenic, i...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8245111
更新日期:1982-11-01 00:00:00
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journal_title:Environmental health perspectives
pub_type:
doi:10.1289/ehp.96104590
更新日期:1996-06-01 00:00:00
abstract::High cadmium exposure is known to cause bone damage, but the association between low-level cadmium exposure and osteoporosis remains to be clarified. Using a population-based women's health survey in southern Sweden [Women's Health in the Lund Area (WHILA) ] with no known historical cadmium contamination, we investiga...
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doi:10.1289/ehp.8763
更新日期:2006-06-01 00:00:00
abstract:BACKGROUND:The effect of indoor nitrogen dioxide concentrations on asthma morbidity among inner-city preschool children is uncertain. OBJECTIVES:Our goal was to estimate the effect of indoor NO2 concentrations on asthma morbidity in an inner-city population while adjusting for other indoor pollutants. METHODS:We recr...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.11349
更新日期:2008-10-01 00:00:00
abstract::Dietary vitamin E affects the susceptibility of mice and rats to ozone and nitrogen dioxide, suggesting a free radical mechanism of toxicity. Conventional peroxidation does not completely explain the effects of alterations of lung fatty acid composition on both nitrogen dioxide and ozone toxicity. A new scheme is prop...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7929105
更新日期:1979-04-01 00:00:00
abstract::A major goal of studying farmworkers is to better understand how their work environment, including exposure to pesticides, affects their health. Although a number of health conditions have been associated with pesticide exposure, clear linkages have yet to be made between exposure and health effects except in cases of...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.8526
更新日期:2006-06-01 00:00:00
abstract:BACKGROUND:Organophosphates elicit developmental neurotoxicity through multiple mechanisms other than their shared property as cholinesterase inhibitors. Accordingly, these agents may differ in their effects on specific brain circuits. OBJECTIVES:We gave parathion to neonatal rats [postnatal days (PNDs) 1-4], at daily...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.11451
更新日期:2008-10-01 00:00:00
abstract:BACKGROUND:Tens of millions of Americans suffer from a range of adverse health outcomes due to noise exposure, including heart disease and hearing loss. Reducing environmental noise pollution is achievable and consistent with national prevention goals, yet there is no national plan to reduce environmental noise polluti...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1307272
更新日期:2014-02-01 00:00:00
abstract::Neurogenic inflammation as a pathway distinct from antigen-driven, immune-mediated inflammation may play a pivotal role in understanding a broad class of environmental health problems resulting from chemical exposures. Recent progress in understanding the mediators, triggers, and regulation of neurogenic inflammation ...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.93101234
更新日期:1993-08-01 00:00:00
abstract::Thirty compounds of various chemical classes were investigated for mutagenicity in a collaborative study (three laboratories) using Salmonella typhimurium TA102. With five compounds, hydrazine sulfate, phenylhydrazine, hydralazine, glutardialdehyde, and glyoxal, mutagenicity was detected by all laboratories. Formaldeh...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.101-1521147
更新日期:1993-10-01 00:00:00
abstract::This article summarizes the basic facts about the measurement of ionizing radiation, usually referred to as radiation dosimetry. The article defines the common radiation quantities and units; gives typical levels of natural radiation and medical exposures; and describes the most important biological effects of radiati...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.919145
更新日期:1991-02-01 00:00:00