Hemopoietic stem cells: stochastic differentiation and humoral control of proliferation.

abstract：:We investigated the metabolic fate of a low dose (25 micro g/kg) of bisphenol A [2,2-bis(4-hydroxy-phenyl)propane] (BPA) injected subcutaneously in CD1 pregnant mice using a tritium-labeled molecule. Analytic methods were developed to allow a radio-chromatographic profiling of BPA residues in excreta and tissues, as w...

journal_title：Environmental health perspectives

authors： Zalko D,Soto AM,Dolo L,Dorio C,Rathahao E,Debrauwer L,Faure R,Cravedi JP

更新日期：2003-03-01 00:00:00

abstract：:The activities of plants and plant/microbial associations may offer a viable means of accomplishing the in situ remediation of contaminated soils. Two uses of plants for phytoremediation are reported here. In one set of studies, the ability of plants to foster degradative microorganisms was investigated. Results indic...

journal_title：Environmental health perspectives

authors： Shann JR

更新日期：1995-06-01 00:00:00

abstract：:Droplets of toluene and three chlorinated organics, ortho-dichlorobenzene, 1,2-dichloroethane, and trichloroethylene, were pyrolyzed in pure nitrogen. The composition and bacterial mutagenicity of the product tars were measured. The presence of organic chlorine was found to affect both pyrolysis product tar compositio...

journal_title：Environmental health perspectives

authors： Mulholland JA,Sarofim AF,Longwell JP,Lafleur AL,Thilly WG

更新日期：1994-01-01 00:00:00

abstract：:In this study, the cohort consisted of 18,135 distribution employees with potential exposure to gasoline for at least one year at land-based terminals (n = 9,026) or on marine vessels (n = 9,109) between 1946 and 1985. The primary objective of the study was to determine the relationship, if any, between exposure to ga...

journal_title：Environmental health perspectives

authors： Wong O,Harris F,Smith TJ

更新日期：1993-12-01 00:00:00

abstract：:The Children's Post-Pesticide Application Exposure Study (CPPAES) was conducted to look at the distribution of chlorpyrifos within a home environment for 2 weeks after a routine professional crack-and-crevice application and to determine the amount of the chlorpyrifos that is absorbed by a child living within the home...

journal_title：Environmental health perspectives

authors： Hore P,Robson M,Freeman N,Zhang J,Wartenberg D,Ozkaynak H,Tulve N,Sheldon L,Needham L,Barr D,Lioy PJ

更新日期：2005-02-01 00:00:00

abstract：:Male reproduction has been given little attention in science and in medical practice. However, a recent metaanalysis on semen quality, which clearly pointed to a decrease over the past 50 years, has been repeatedly quoted. Three recent reports have found that semen quality has declined among candidate semen donors dur...

journal_title：Environmental health perspectives

authors： Carlsen E,Giwercman A,Keiding N,Skakkebaek NE

更新日期：1995-10-01 00:00:00

abstract：:There is growing public pressure to minimize the use of vertebrates in ecotoxicity testing; therefore, effective alternatives to toxicity tests causing suffering are being sought. This report discusses alternatives and differs in some respects from the reports of the other three groups because the primary concern is w...

journal_title：Environmental health perspectives

authors： Walker C,Kaiser K,Klein W,Lagadic L,Peakall D,Sheffield S,Soldan T,Yasuno M

更新日期：1998-04-01 00:00:00

abstract：BACKGROUND:Arsenic is metabolized through a series of oxidative methylation reactions by arsenic (3) methyltransferase (As3MT) to yield methylated intermediates. Although arsenic exposure is known to increase the risk of atherosclerosis, the contribution of arsenic methylation and As3MT remains undefined. OBJECTIVES:O...

journal_title：Environmental health perspectives

authors： Negro Silva LF,Lemaire M,Lemarié CA,Plourde D,Bolt AM,Chiavatti C,Bohle DS,Slavkovich V,Graziano JH,Lehoux S,Mann KK

更新日期：2017-07-05 00:00:00

abstract：:Once a sign of modernization and growth, dams are often seen today as symbols of environmental and social devastation. Over 800,000 dams have been built worldwide to provide drinking water, flood control, hydropower, irrigation, navigation, and water storage. Dams do indeed provide these things,but at the cost of seve...

journal_title：Environmental health perspectives

authors： Joyce S

更新日期：1997-10-01 00:00:00

abstract：:We have demonstrated that the pyrolysis products of amino acids and proteins in model systems are mutagenic. The mutagenic principles in the pyrolyzates of amino acids have been isolated and identified by Sugimura et al. We have isolated and identified amino-alpha-carbolines from pyrolyzed soybean globulin as mutagens...

journal_title：Environmental health perspectives

authors： Yoshida D,Matsumoto T,Okamoto H,Mizusaki S,Kushi A,Fukuhara Y

更新日期：1986-08-01 00:00:00

abstract：:The effect of sodium selenite administered intragastrically in repeated doses to rats receiving ethylmercuric chloride po in various repeated doses (0.25 or 2.5 mg Hg/kg) on the excretion, whole-body retention, and organ distribution of mercury was studied. Selenium was found to affect the distribution of ethylmercury...

journal_title：Environmental health perspectives

authors： Brzeźnicka EA,Chmielnicka J

更新日期：1981-06-01 00:00:00

abstract：:Cofactors involved in respiratory tract carcinogenesis were studied in Syrian golden hamsters or in rats using benzo(a)pyrene as the carcinogenic agent. These factors included severe tissue damage induced by electro-coagulation, glass fibers administered by intratracheal instillation, acetaldehyde as irritant vapor, f...

journal_title：Environmental health perspectives

authors： Reuzel PG,Feron VJ,Spit BJ,Beems RB,Kroes R

更新日期：1983-04-01 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

authors： Godard-Codding CA,Clark R,Fossi MC,Marsili L,Maltese S,West AG,Valenzuela L,Rowntree V,Polyak I,Cannon JC,Pinkerton K,Rubio-Cisneros N,Mesnick SL,Cox SB,Kerr I,Payne R,Stegeman JJ

更新日期：2011-03-01 00:00:00

abstract：BACKGROUND:Hydraulically fractured wells produce 2-14 million liters of wastewater, which may contain toxic and radioactive compounds. The wastewater is predominantly disposed of using Class II injection wells. OBJECTIVE:Our objective was to evaluate the relationship between sociodemographic characteristics and inject...

journal_title：Environmental health perspectives

authors： Silva GS,Warren JL,Deziel NC

更新日期：2018-06-27 00:00:00

abstract：:Flavone and isoflavone phytoestrogens are plant chemicals and are known to be competitive inhibitors of cytochrome P450 aromatase with respect to the androgen substrate. Aromatase is the enzyme that converts androgen to estrogen; therefore, these plant chemicals are thought to be capable of modifying the estrogen leve...

journal_title：Environmental health perspectives

authors： Kao YC,Zhou C,Sherman M,Laughton CA,Chen S

更新日期：1998-02-01 00:00:00

abstract：:Some of the statistical properties of a simple two-stage model of carcinogenesis are explored. The implications of additive treatment effects versus independent treatment effects on the shape of the dose-response curve are considered. Response that is low-dose linear results in the cases where the mutation rates are a...

journal_title：Environmental health perspectives

authors： Portier CJ

更新日期：1987-12-01 00:00:00

abstract：:Dietary components express a wide range of activities that can affect carcinogenesis. Naturally occurring substances in foods have been shown in laboratory experiments to serve as dietary antimutagens, either as bioantimutagens or as desmutagens. Dietary desmutagens may function as chemical inactivaters, enzymatic ind...

journal_title：Environmental health perspectives

authors： Kohlmeier L,Simonsen N,Mottus K

更新日期：1995-11-01 00:00:00

abstract：:Metabolic enzymes involved in benzene activation or detoxification, including NAD(P)H, quinone oxidoreductase 1 (NQO1), cytochrome P450 2E1 (CYP2E1), myeloperoxidase (MPO), glutathione-S-transferase mu-1 (GSTM1), and glutathione-S-transferase theta-1 (GSTT1), were studied for their roles in human susceptibility to ben...

journal_title：Environmental health perspectives

authors： Wan J,Shi J,Hui L,Wu D,Jin X,Zhao N,Huang W,Xia Z,Hu G

更新日期：2002-12-01 00:00:00

abstract：:There is an increasing interest in the development and validation of biomarkers for use in biochemical/molecular epidemiological studies. Though the area of neurotoxicology has received much attention in the past several years, it still lags behind with regard to the development of biomarkers, particularly those of he...

journal_title：Environmental health perspectives

authors： Costa LG

更新日期：1996-03-01 00:00:00

abstract：:Metallothionein (MT) promoter was methylated in rat hepatoma and in mouse lymphosarcoma cells by methylation of cytosine within the CpG dinucleotide region. After demethylation of MT-I promoter in mouse lymphosarcoma cells or in the transplanted rat hepatoma with 5-azacytidine, a potent inhibitor of DNA methyltransfer...

journal_title：Environmental health perspectives

authors： Jacob ST,Majumder S,Ghoshal K

更新日期：2002-10-01 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

authors： Ahsan H,Wang LY,Chen CJ,Tsai WY,Santella RM

更新日期：2001-08-01 00:00:00

abstract：:Current research indicates a role for several oncogenes in radiation-induced carcinogenesis in vivo and cell transformation in vitro. Certain oncogenes are probably also involved in some cases of human cancer caused by exposure to nonionizing radiation and may play a mechanistic role in the phenomenon of radioresistan...

journal_title：Environmental health perspectives

authors： Garte SJ,Burns FJ

更新日期：1991-06-01 00:00:00

abstract：BACKGROUND:Widespread residential pesticide use throughout the United States has resulted in ubiquitous, low-level pesticide exposure. The mix of active pesticide ingredients is changing in response to 2000-2001 regulations restricting use of the organophosphorus insecticides chlorpyrifos and diazinon. OBJECTIVES:We a...

journal_title：Environmental health perspectives

authors： Williams MK,Rundle A,Holmes D,Reyes M,Hoepner LA,Barr DB,Camann DE,Perera FP,Whyatt RM

更新日期：2008-12-01 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

authors： Luster MI,Simeonova PP,Gallucci R,Matheson J

更新日期：1999-10-01 00:00:00

abstract：:A biodosimetric approach to determine alpha-particle dose to the respiratory tract epithelium from known exposures to radon has been developed in the rat. Cytotoxicity assays have been used to obtain dose-conversion factors for cumulative exposures typical of those encountered by underground uranium miners. However, t...

journal_title：Environmental health perspectives

authors： Johnson NF,Carpenter TR,Jaramillo RJ,Liberati TA

更新日期：1997-06-01 00:00:00

abstract：:The anatomy of the intestine is outlined. The kinetics of cell proliferation, differentiation, and migration in intestinal epithelium are described. The distribution of cell types between the proliferation and differentiation compartments of the epithelium is summarized. Seven preparations of intestine in current use ...

journal_title：Environmental health perspectives

authors： Porteous JW

更新日期：1979-12-01 00:00:00

abstract：:The phenylphosphonothioate insecticides EPN and leptophos, and several analogs, were evaluated with respect to their delayed neurotoxic effects in hens and their environmental behavior in a terrestrial-aquatic model ecosystem. Acute toxicity to insects was highly correlated with sigma sigma of the substituted phenyl g...

journal_title：Environmental health perspectives

authors： Francis BM,Hansen LG,Fukuto TR,Lu PY,Metcalf RL

更新日期：1980-06-01 00:00:00

abstract：BACKGROUND:Although it is well established that air pollutants can exacerbate asthma, the link with new asthma onset in children is less clear. OBJECTIVE:We assessed the association between the onset of childhood asthma with both time of birth and time-varying exposures to outdoor air pollutants. METHOD:An open cohor...

journal_title：Environmental health perspectives

authors： Tétreault LF,Doucet M,Gamache P,Fournier M,Brand A,Kosatsky T,Smargiassi A

更新日期：2016-08-01 00:00:00

abstract：:In recent years there has been an increasing focus in environmental risk assessment on children as a potentially susceptible population. There also has been growing recognition of the need for a systematic approach for organizing, evaluating, and incorporating the available data on children's susceptibilities in risk ...

journal_title：Environmental health perspectives

authors： Daston G,Faustman E,Ginsberg G,Fenner-Crisp P,Olin S,Sonawane B,Bruckner J,Breslin W,McLaughlin TJ

更新日期：2004-02-01 00:00:00

abstract：:Many mutagenic heterocyclic amines (HAs) have been isolated from cooked foods and pyrolysates of amino acids and proteins, and the carcinogenicity of 10 of these HAs in rodents and of 1 in monkeys has been reported. Quantification of these carcinogenic HAs in various kinds of cooked foods indicated that the level of 2...

journal_title：Environmental health perspectives

authors： Wakabayashi K,Ushiyama H,Takahashi M,Nukaya H,Kim SB,Hirose M,Ochiai M,Sugimura T,Nagao M

更新日期：1993-03-01 00:00:00