Abstract:
:Haloalkane toxicity originates from attack on biological targets by reactive intermediates derived from haloalkane metabolism by a hemoprotein, cytochrome P-450. Carbon-centered radicals and their peroxyl derivatives are most likely involved. The reactions of iron porphyrin--a model for cytochrome P-450--with various carbon-centered and peroxyl radicals generated by pulse radiolysis are examined. Competition between iron porphyrin and unsaturated fatty acids for attack by peroxyl radicals is pointed out. These kinetic data are used to derive a model for toxicity of haloalkanes with particular attention to carbon tetrachloride and halothane. The importance of local oxygen concentration and structural arrangement of fatty acids around cytochrome P-450 is emphasized.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Brault Ddoi
10.1289/ehp.856453subject
Has Abstractpub_date
1985-12-01 00:00:00pages
53-60eissn
0091-6765issn
1552-9924journal_volume
64pub_type
杂志文章abstract::There is accumulating evidence that the multistage carcinogenic process is associated with the progressive acquisition of mutations in cellular proto-oncogenes and in growth-suppressor genes. At the same time, several types of evidence indicate that nongenotoxic agents and epigenetic events also play an important role...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.9193175
更新日期:1991-06-01 00:00:00
abstract::Human biomonitoring investigations have provided data on a wide array of chemicals in blood and urine and in other tissues and fluids such as hair and human milk. These data have prompted questions such as a) What is the relationship between levels of environmental chemicals in humans and external exposures? b) What i...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8197
更新日期:2005-11-01 00:00:00
abstract::Methyl parathion (MP), an organophosphate pesticide licensed only for agricultural uses, was sprayed illegally for pest control in Mississippi and Ohio residences. To evaluate the association between MP exposure and neurobehavioral development, we assessed children 6 years or younger at the time of the spraying and lo...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.6430
更新日期:2004-01-01 00:00:00
abstract::This paper addresses the subject of the use of selected toxicology information resources in assessing relationships between chemical structure and specific biological end points. To assist the researcher in how to access the primary literature of genetic toxicology, teratogenesis, and carcinogenesis, three specific sp...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8561287
更新日期:1985-09-01 00:00:00
abstract::This study was undertaken to explore the effects of chronic low-level cadmium ingestion in Dahl hypertension-resistant (R) and hypertension-sensitive (S) lines of rats. Groups of weanling female R and S rats were given 0 or 1 mg cadmium/1. in drinking water and fed either a low salt (0.4% NaCl) or a high salt (4% NaCl...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7928261
更新日期:1979-02-01 00:00:00
abstract:BACKGROUND:Cadmium (Cd) is a human toxicant and carcinogen. Genetic variation might affect long-term accumulation. Cd is absorbed via iron transporters. OBJECTIVES:We evaluated the impact of iron homeostasis genes [divalent metal transporter 1 (SLC11A2), transferrin (TF), transferrin receptors (TFR2 and TFRC), and fer...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1205672
更新日期:2013-04-01 00:00:00
abstract::The significance of the environment for health is increasingly being recognized. There is a need for systematic approaches to assessment of environmental factors most relevant to health, health outcomes most influenced by the environment, and the relationships between them, as well as for approaches to representing th...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8321
更新日期:2006-03-01 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::This paper reports the results of a comprehensive survey of the effects of the accidental release of radiation caused by the accident at the Chernobyl nuclear power station in April 1986. The accident and the resulting release of radiation and radioactive products into the atmosphere produced the most serious environm...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.93101s2117
更新日期:1993-07-01 00:00:00
abstract::Exposure to aflatoxin B1 (AFB1), an important cofactor in the etiology of hepatocellular carcinoma in Taiwan, is influenced by dietary and other factors. The present study examined the intraindividual variability in AFB1-albumin adducts, the most reliable long-term biomarker of AFB1 exposure, and whether the baseline ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.01109833
更新日期:2001-08-01 00:00:00
abstract:BACKGROUND:Bisphenol A (BPA) is known to be biologically active in experimental models even at low levels of exposure. However, its impact on endometrial cancer remains unclear. OBJECTIVES:This study aimed to investigate whether lifelong exposure to different doses of BPA induced uterine abnormalities and molecular ch...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP6875
更新日期:2020-12-01 00:00:00
abstract::Nicotine and cigarette smoke extract show acute physiological effects: increasing tracheal pressure (PTR), pulmonary artery pressure (PPA), systemic blood pressure (PSYST), and left atrium pressure (PLA); and decreasing cardiac output (QAORTA) and blood flow to the left lower lobe (QLLL). In addition, cigarette smokin...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.8772283
更新日期:1987-06-01 00:00:00
abstract::A combined cytogeneticurine metabolite analysis approach was used to assess potential interactive effects between Fenarimol (FN), a fungicide, and trichloroethylene (TRI), a halogenated solvent. FN was demonstrated to selectively induce P450-2B1 isoforms in different organs of treated mice. Since the rate of metabolis...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.94102s931
更新日期:1994-11-01 00:00:00
abstract:BACKGROUND:Use of pyrethroid insecticides has increased dramatically over the past decade; however, data on their potential health effects, particularly on children, are limited. OBJECTIVE:We examined the cross-sectional association between postnatal pyrethroid exposure and parental report of learning disability (LD) ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1308031
更新日期:2014-12-01 00:00:00
abstract::Some have hypothesized that community water containing sodium silicofluoride and hydrofluosilicic acid may increase blood lead (PbB) concentrations in children by leaching of lead from water conduits and by increasing absorption of lead from water. Our analysis aimed to evaluate the relation between water fluoridation...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8319
更新日期:2006-01-01 00:00:00
abstract:OBJECTIVE:Pentachlorophenol, a fungicide widely used as a wood preservative, was classified in 1999 by the International Agency for Research on Cancer as a possible human carcinogen. We reviewed currently available data to determine the extent to which recent studies assist in distinguishing the effect of pentachloroph...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.11081
更新日期:2008-08-01 00:00:00
abstract::Comments on "Determination of bisphenol A and related aromatic compounds released from Bis-GMA-based composites and sealants by high performance liquid chromatography." by ulgar R, Olea-Serrano MF, Novillo-Fertrell A, Rivas A, Pazos P, Pedraza V, Navajas J-M, Olea N. Environ Health Perspect 108:21-27 (2000). ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.108-a546a
更新日期:2000-12-01 00:00:00
abstract::The hypothesis has been put forward that humans and wildlife species adverse suffered adverse health effects after exposure to endocrine-disrupting chemicals. Reported adverse effects include declines in populations, increases in cancers, and reduced reproductive function. The U.S. Environmental Protection Agency spon...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.96104s4715
更新日期:1996-08-01 00:00:00
abstract::Relative advantages and disadvantages and important design criteria for various exposure methods are presented. Five types of exposures are discussed: whole-body chambers, head-only exposures, nose or mouth-only methods, lung-only exposures, and partial-lung exposures. Design considerations covered include: air cleani...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.761617
更新日期:1976-08-01 00:00:00
abstract::Population monitoring using methods of molecular epidemiology combined with reliable data on exposure is an extremely powerful approach to determine the effect of mutagens on human populations. Although human blood and urine have traditionally been used for biomonitoring, an increase in the use of placental and buccal...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.104-1469653
更新日期:1996-05-01 00:00:00
abstract::Pavlovian conditioning processes may contribute to some symptoms of multiple chemical sensitivity (MCS). This review summarizes the potential relevance of the literature on conditional taste and olfactory aversions, conditional sensitization, and conditional immunomodulation to understanding MCS. A conditioning-based ...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.97105s2521
更新日期:1997-03-01 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:"Airwave" is the new communication system currently being rolled out across the United Kingdom for the police and emergency services, based on the Terrestrial Trunked Radio Telecommunications System (TETRA). Some police officers have complained about skin rashes, nausea, headaches, and depression as a conseq...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0901416
更新日期:2010-06-01 00:00:00
abstract:BACKGROUND:In the developing brain, serotonin (5HT) systems are among the most sensitive to disruption by organophosphates. OBJECTIVES:We exposed neonatal rats to daily doses of diazinon or parathion on postnatal days (PND)1-4 and evaluated 5HT receptors and the 5HT transporter in brainstem and forebrain on PND5, focu...
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
abstract::To assess levels of chlorinated contaminants in breast milk, we measured organochlorine pesticides, polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins (PCDDs), and polychlorinated dibenzofurans (PCDFs) in breast milk samples collected in 1994 according to the World Health Organization protocol from 92 donors...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.98106797
更新日期:1998-12-01 00:00:00
abstract:BACKGROUND:Many pesticides in current use have recently been revealed as in vitro androgen receptor (AR) antagonists, but information about their combined effects is lacking. OBJECTIVE:We investigated the combined effects and the competitive AR antagonism of pesticide mixtures. METHODS:We used the MDA-kb2 assay to te...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1205391
更新日期:2012-11-01 00:00:00
abstract::Children are uniquely vulnerable to toxic chemicals in the environment. Among the environmental toxicants to which children are at risk of exposure are endocrine disruptors (EDs)--chemicals that have the capacity to interfere with hormonal signaling systems. EDs may alter feedback loops in the brain, pituitary, gonads...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.5799
更新日期:2003-10-01 00:00:00
abstract::We present a case of a diamond polisher who developed occupational asthma as a result of prolonged exposure to various potent and well-recognized asthma-inducing agents, including cobalt dust. Although the patient was seen by various medical professionals during the initial course of his illness and given an early dia...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.011091303
更新日期:2001-12-01 00:00:00
abstract::This study investigated the association between biomarkers of fetal exposure to cigarette smoke at the end of pregnancy, cotinine in cord serum and in maternal and newborn urine samples, and quantitative measurement of smoking intake and exposure evaluated by maternal self-reported questionnaire. Study subjects were 4...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.001081079
更新日期:2000-11-01 00:00:00
abstract::The effects of global change on biodiversity and ecosystem functioning encompass multiple complex dynamic processes. Climate change and exposure to endocrine-disrupting chemicals (EDCs) are currently regarded as two of the most serious anthropogenic threats to biodiversity and ecosystems. We should, therefore, be espe...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.8057
更新日期:2006-04-01 00:00:00