Abstract:
:According to current data, the capacity to cause nonprogrammed or unscheduled cell proliferation in target tissues, a common characteristic of chemical carcinogens, may play a more important role in the development of tumors than does genotoxicity. This paper provides strong support for the validity of this conclusion. Ames-negative nongenotoxicants may be considered to be carcinogenic primarily because of their ability to induce cell proliferation in animal tissues and organs. In addition, such nongenotoxic carcinogens may also provide latent and modest DNA (equivocal) modifications that never lead to Ames-positive events. Conversely, noncarcinogenesis by Ames-positive agents is likely to be linked to a lack of stimulation of cell division. Nongenotoxic and genotoxic carcinogens rely on both cell proliferation and equivocal DNA modification for their full carcinogenicity. Such equivocal DNA modifications do not appear to be formed by tumor promoters. The role of cell proliferation may provide a favorable milieu for the occurrence of genetic instability, give rise to selective "apoptosis-resistant abnormal cells," and then affect clonal expansion of these cells. Therefore, understanding the influence of nongenotoxic and genotoxic carcinogens on cell proliferation capability is a key point in determining the mechanisms of chemical carcinogenesis. Considering the contradictory and common features of genotoxicants and carcinogens, early detection of nonprogrammed cell proliferation is the most effective approach to predict human and rodent carcinogenicity.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Yoshikawa Kdoi
10.1289/ehp.9610440subject
Has Abstractpub_date
1996-01-01 00:00:00pages
40-6issue
1eissn
0091-6765issn
1552-9924journal_volume
104pub_type
杂志文章,评审abstract:BACKGROUND:Most studies on endocrine-disrupting chemicals and breast cancer have focused on single compounds and have produced inconclusive findings. OBJECTIVES:We assessed the combined estrogenic effects of mixtures of xenoestrogens in serum and their relationship to breast cancer risk. METHODS:A total of 186 incide...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP157
更新日期:2016-10-01 00:00:00
abstract::While the rat pancreas is susceptible to experimental cancer induction, the spontaneous incidence of pancreatic cancer in this species is reported to be very low. However, we observed unusually high incidences of focal acinar hyperplasia and acinar adenoma in vehicle control male F344/N rats of some NCI/NTP 2-year tox...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8456213
更新日期:1984-06-01 00:00:00
abstract:BACKGROUND:Agricultural use of antimicrobials in subtherapeutic concentrations is increasing in response to the rising demand for food animal products worldwide. In India, the use of antimicrobials in food animal production is unregulated. Research suggests that many clinically important antimicrobials are used indiscr...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP292
更新日期:2017-07-20 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:BACKGROUND:Agricultural work and occupational pesticide use have been associated with increased risk of renal cell carcinoma (RCC), the most common form of kidney cancer. However, few prospective studies have investigated links to specific pesticides. OBJECTIVE:We evaluated the lifetime use of individual pesticides an...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP6334
更新日期:2020-06-01 00:00:00
abstract::Polychlorinated biphenyls (PCBs) are important environmental contaminants, and their toxicity to wildlife and humans are of major concern. PCBs form persistent and abundant metabolites, PCB methyl sulfones, that accumulate in biota. We now report that certain hydroxylated PCB metabolites show a strong and selective ac...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.94102464
更新日期:1994-05-01 00:00:00
abstract::New technologies and methods for assessing human exposure to chemicals, dietary and lifestyle factors, infectious agents, and other stressors provide an opportunity to extend the range of human health investigations and advance our understanding of the relationship between environmental exposure and disease. An ad hoc...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.7651
更新日期:2005-07-01 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::We conducted experiments to determine whether diesel engine exhaust affects reproductive endocrine function in growing rats. The rats were assigned to three groups: a group exposed to total diesel engine exhaust containing 5.63 mg/m3 particulate matter, 4.10 ppm nitrogen dioxide, and 8.10 ppm nitrogen oxide; a group e...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.99107539
更新日期:1999-07-01 00:00:00
abstract:BACKGROUND:Eliminating silicosis is a priority of the International Labour Organization and the World Health Organization. Prevalence is particularly high in developing countries. OBJECTIVES:We describe trends in silicosis among South African gold miners who had had an autopsy between 1975 and 2007 and quantify the co...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0900918
更新日期:2010-03-01 00:00:00
abstract::The binary, ternary, quaternary, and quintary interactions of a five-component mixture of carcinogenic environmental polycyclic aromatic hydrocarbons (PAHs) using response surface analyses are described. Initially, lung tumor dose-response curves in strain A/J mice for each of the individual PAHs benzo[a]pyrene (B[a]P...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.98106s61337
更新日期:1998-12-01 00:00:00
abstract::Over the past decade much information has been published on the analysis of organics extracted from treated water. Certain of these organics have been shown to be by-products of the chlorination disinfection process and to possess harmful effects at high concentrations. This has resulted in increased interest in alter...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.824687
更新日期:1982-12-01 00:00:00
abstract::The Tradescantia genetic system developed by the late Dr. Arnold H. Sparrow for the study of effects of ionizing radiation is applicable to chemical mutagen detection. Early radiobiological data demonstrated that the stamen hairs were sensitive to as little as 0.25 rad of x-rays and that the number of cells showing a ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.782751
更新日期:1978-12-01 00:00:00
abstract::There are still many uncertainties regarding the risk of adverse pregnancy outcomes associated with exposure to drinking water disinfection by-products. In Montréal, Québec, Canada, we carried out a hospital-based case-control study including 493 cases of intrauterine growth restriction defined as birth weight below t...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7003
更新日期:2004-08-01 00:00:00
abstract::This report updates the risk assessment by Crump and Allen for benzene-induced leukemia that was based on a cohort exposed to benzene in the manufacture of Pliofilm. The present study derives new risk estimates using data from follow-up through 1987 (whereas the earlier assessment only had follow-up available through ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.961041437
更新日期:1996-12-01 00:00:00
abstract:BACKGROUND:Microcystin-producing Microcystis bloom is a severe water problem in the world. Some reports indicate that chronic exposure to microcystin may result in liver damage in adults, but information on effects in children is limited. OBJECTIVE:We investigated the relationship between microcystin exposure and live...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1002412
更新日期:2011-10-01 00:00:00
abstract::In 1994 officials from the Ohio Department of Health reported that some residents of Lorain County, Ohio, possibly had been exposed to methyl parathion (MP), a highly toxic restricted-use pesticide. The U.S. Centers for Disease Control and Prevention (CDC) assisted in the investigation by providing epidemiologic and l...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.02110s61057
更新日期:2002-12-01 00:00:00
abstract::The Environmental Public Health Tracking Network (EPHTN) proposes to link environmental hazards and exposures to health outcomes. Statistical methods used in case-control and cohort studies to link health outcomes to individual exposure estimates are well developed. However, reliable exposure estimates for many contam...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7145
更新日期:2004-10-01 00:00:00
abstract:BACKGROUND:Although from a societal point of view a modal shift from car to bicycle may have beneficial health effects due to decreased air pollution emissions, decreased greenhouse gas emissions, and increased levels of physical activity, shifts in individual adverse health effects such as higher exposure to air pollu...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.0901747
更新日期:2010-08-01 00:00:00
abstract::There are a number of technical and statistical problems in monitoring the temporal and spatial variation of local area death rates in the United States for evidence of systematically elevated risks. An analytic strategy is proposed to reduce one of the major statistical concerns, i.e., that of identifying areas with ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8560369
更新日期:1985-05-01 00:00:00
abstract::Pregnant Sprague Dawley rats were given 0, 0.25, 0.5, 1, 5, and 10 mg of a commercial polybrominated biphenyl, FireMaster BP-6 (PBB), in olive oil by gavage each day from days 7 through 15 of pregnancy. Laboratory chow and water were given ad libitum. Treatment with PBB had no significant effect on body weight gain, f...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7823295
更新日期:1978-04-01 00:00:00
abstract:OBJECTIVE:Our aim was to investigate exposure to polybrominated diphenyl ethers (PBDEs) in a young urban population in a developing country, with focus on potentially highly exposed children working informally as scrap scavengers at a large municipal waste disposal site. We also set out to investigate whether hydroxyla...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.10713
更新日期:2008-03-01 00:00:00
abstract:BACKGROUND:Most research on walking for transport has focused on the walkability of residential neighborhoods, overlooking the contribution of places of work/study and the ease with which destinations outside the immediate neighborhood can be accessed, referred to as regional accessibility. OBJECTIVES:We aimed to exam...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP3395
更新日期:2019-09-01 00:00:00
abstract:BACKGROUND:Recent policies attempting to reduce adverse effects of methylmercury exposure from fish consumption in the United States have targeted reductions in anthropogenic emissions from U.S. sources. OBJECTIVES:To analyze the prospects for future North American and international emissions controls, we assessed the...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0900811
更新日期:2010-01-01 00:00:00
abstract::The lymphocyte micronucleus assay was used to measure the average frequency of micronuclei in a population and thus assess genotoxic effects. Data from 174 persons give an average value of 16.4 +/- 7.3, and a slight age-dependence was observed. To detect combined environmental mutagen injuries the micronucleus assay w...
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:BACKGROUND:Benzene is a common industrial chemical known to induce leukemia and other blood disorders, as well as aneuploidy, in both human blood cells and sperm at exposures > 10 ppm. Recent reports have identified health effects at exposure levels < 1 ppm, the permissible exposure limit (PEL; 8 hr) set by the U.S. Oc...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0901531
更新日期:2010-06-01 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
abstract:OBJECTIVE:The aim of this study was to assess whether the joint effects of three androgen receptor antagonists (vinclozolin, flutamide, procymidone) on male sexual differentiation after in utero and postnatal exposures can be predicted based on dose-response data of the individual chemicals. METHODS:Test chemicals and...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9360
更新日期:2007-12-01 00:00:00
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...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.94102s6161
更新日期:1994-10-01 00:00:00
abstract:BACKGROUND:Human controlled-exposure studies have assessed the impact of ambient fine particulate matter on cardiac autonomic function measured by heart rate variability (HRV), but whether these effects are modified by concomitant ozone exposure remains unknown. OBJECTIVE:In this study we assessed the impact of O(3) a...
journal_title:Environmental health perspectives
pub_type: 杂志文章,随机对照试验
doi:10.1289/ehp.0900541
更新日期:2009-08-01 00:00:00