Alteration of an essential NK cell signaling pathway by low doses of tributyltin in human natural killer cells.

abstract：:Exposure of rats to 0.1 and 0.5 mg Cd/kg subcutaneously (s.c.) thrice weekly for 5 weeks resulted in an accumulation of cadmium in the liver in concentrations of 40 and 95 micrograms/g tissue, respectively, and a microsomal burden of Cd amounting to approx. 2-3% of the retained cadmium. The cytoplasm contained about 8...

journal_title：Toxicology

authors： Klimczak J,Wiśniewska-Knypl JM,Kolakowski J

更新日期：1984-09-14 00:00:00

abstract：:The usefulness of urinary taurine as a non-invasive measure of hepatotoxicity of aflatoxin B1 (AFB1) was evaluated: changes in urinary taurine were characterized in a dose-response, acute toxicity experiment and in two sub-chronic, low dose exposure experiments. Urine of young, male, F344 rats was collected for 4 days...

journal_title：Toxicology

authors： Maxuitenko YY,North WG,Roebuck BD

更新日期：1997-03-28 00:00:00

abstract：:Chemicals can increase carcinogenic risk by either directly damaging DNA or increasing cell replication or they can do both. These effects have different implications for a biologically-based extrapolation from rodent bioassays to humans. 2-Acetylaminofluorene (2-AAF) administered at low doses to mice for a lifetime h...

journal_title：Toxicology

authors： Cohen SM

更新日期：1995-09-01 00:00:00

abstract：:We investigated the ability of alachlor to cause DNA damage by measuring single-strand breaks (SSB) in DNA, after metabolic activation by freshly isolated rat hepatocytes. Incubation of different concentrations of alachlor with rat hepatocytes led to numerous metabolites. The majority, isolated and identified by GC-MS...

journal_title：Toxicology

authors： Bonfanti M,Taverna P,Chiappetta L,Villa P,D'Incalci M,Bagnati R,Fanelli R

更新日期：1992-01-01 00:00:00

abstract：:The ability of 27 compounds to mediate depletion of glutathione (GSH) in a fortified liver microsome incubation via production of reactive metabolites generated by microsomal mono-oxygenase (MMO) metabolism has been studied. The majority of compounds tested of this type were positive in this assay, with the exception ...

journal_title：Toxicology

authors： Garle MJ,Fry JR

更新日期：1989-01-01 00:00:00

abstract：:It is now well-recognized that human environmental exposures are not to single chemicals. Rather, humans are exposed, either concurrently or sequentially, to multiple chemicals. Challenges that chemical mixtures pose for risk assessment and toxicology are presented. Challenge areas include increasing the peer-reviewed...

journal_title：Toxicology

authors： Simmons JE

更新日期：1995-12-28 00:00:00

abstract：:L-695,256 is a novel 2-fluorenonyl carbapenem antibiotic with significant antimicrobial activity against strains of methicillin-resistant Staphylococci. This prototype compound was administered intravenously to rhesus monkeys (Macaca mulatta) at does of 50 or 200 mg/kg/day for 2 weeks to assess toxicity and found to i...

journal_title：Toxicology

authors： Lankas GR,Coleman JB,Klein HJ,Bailly Y

更新日期：1996-04-30 00:00:00

abstract：:Exposure of pregnant C3H/HeNCR mice to 42.5- or 85-ppm of arsenic as sodium arsenite in drinking water between days 8 and 18 of gestation markedly increases tumor incidence in their offspring. In the work reported here, distribution of inorganic arsenic and its metabolites, methyl arsenic and dimethyl arsenic, were de...

journal_title：Toxicology

authors： Devesa V,Adair BM,Liu J,Waalkes MP,Diwan BA,Styblo M,Thomas DJ

更新日期：2006-07-05 00:00:00

abstract：:Bisphenol A has been shown to affect the reproduction of male rats and mice. However, the mechanism of action of bisphenol A on the epididymal sperm is not elucidated. The present study was undertaken to evaluate the effect of bisphenol A on the antioxidant system of rat epididymal sperm. Bisphenol A was administered ...

journal_title：Toxicology

authors： Chitra KC,Latchoumycandane C,Mathur PP

更新日期：2003-03-14 00:00:00

abstract：:Dimethoate, azinphos-methyl, diazinon and pirimiphos-methyl, widely used organophosphorous insecticides, and benomyl, a benzimidazole fungicide, induce different cytotoxic effects on the human leukemia cell line HL-60. Among the insecticides tested, only azinphos and diazinon induced a dose-related inhibition of prote...

journal_title：Toxicology

authors： Marinovich M,Guizzetti M,Galli CL

更新日期：1994-11-01 00:00:00

abstract：:Toxicity and other relevant data for 30 organophosphate pesticides were evaluated to suggest inhalation occupational exposure limits (OELs), and to support development of a risk assessment strategy for organophosphates in general. Specifically, the value of relative potency analysis and the predictability of inhalatio...

journal_title：Toxicology

authors： Storm JE,Rozman KK,Doull J

更新日期：2000-09-07 00:00:00

abstract：:Recent studies have demonstrated that mammalian sperm are capable of generating reactive oxygen species (ROS) and that this activity is significantly accelerated in subfertile subjects. The observed decrease in penetration of zona-intact oocyte might be explained by chemical-induced ROS-related early onset of capacita...

journal_title：Toxicology

authors： Hsu PC,Hsu CC,Guo YL

更新日期：1999-11-29 00:00:00

abstract：:Epidemiological studies have implicated fine particulate matter (PM2.5) as a risk factor for neurodegenerative diseases and neurodevelopmental disorders. However, the underlying molecular mechanisms and the influences of different components remain largely elusive. Here, we extended our previous work to investigate th...

journal_title：Toxicology

authors： Wei H,Feng Y,Liang F,Cheng W,Wu X,Zhou R,Wang Y

更新日期：2017-04-01 00:00:00

abstract：:A large number of published studies support the notion that long term, low level (LTLL) exposure to organophosphorus (OP) esters may cause neurological and neurobehavioral effects. In order to differentiate these from other effects of OP such as the acute cholinergic episodes, intermediate syndrome and organophosphate...

journal_title：Toxicology

authors： Jamal GA,Hansen S,Julu PO

更新日期：2002-12-27 00:00:00

abstract：:Mitochondrial dysfunction with exposure to anthropogenic contaminants is a critical concern in biomedical and ecological health. Importantly, understanding the role of mitotoxicants in modulating organismal fitness and survival, particularly in the context of species' resilience to shifts in abiotic factors with clima...

journal_title：Toxicology

authors： Jayasundara N

更新日期：2017-11-01 00:00:00

abstract：:NLRC5, a newly found member of the NLR family and the largest member of nucleotide-binding, has been reported to regulate immune responses and is associated with hepatocellular carcinoma (HCC). We investigated the mechanisms and signaling pathways of NLRC5 in HCC progression. Increased expression of NLRC5, vascular en...

journal_title：Toxicology

authors： He YH,Li MF,Zhang XY,Meng XM,Huang C,Li J

更新日期：2016-06-01 00:00:00

abstract：:We provide an overview of the functional interrelationship between genes and proteins related to DNA repair by homologous recombination and cell cycle regulation in relation to the progression and therapy resistance of human tumours. To ensure the high-fidelity transmission of genetic information from one generation t...

journal_title：Toxicology

authors： Henning W,Stürzbecher HW

更新日期：2003-11-15 00:00:00

abstract：:The induction of unscheduled DNA synthesis (UDS) in early spermatid stages of mice was studied after treatment with hydrazine or procarbazine (Natulan). The UDS response was assayed by measuring the levels of [3H]dThd in the nuclei of sperm cells derived from treated and untreated early spermatid stages. The radioacti...

journal_title：Toxicology

authors： Sotomayor RE,Chauhan PS,Ehling UH

更新日期：1982-01-01 00:00:00

abstract：:Several reports have described the effects of trichloroethylene (TCE) on the microsomal mixed function oxidase system (MFOS). These studies suggest that repeated TCE administration induces MFOS, especially cytochrome P-450 and NADPH-cytochrome c reductase. However, it is uncertain what isozymes are induced by TCE trea...

journal_title：Toxicology

authors： Kawamoto T,Hobara T,Nakamura K,Imamura A,Ogino K,Kobayashi H,Iwamoto S,Sakai T

更新日期：1988-12-30 00:00:00

abstract：:Deoxynivalenol (DON) is one of the major mycotoxic contaminants of grains, which causes reduced weight gain in pigs. The cytotoxicity of DON to porcine hepatocytes was examined in this study. DON was added at the final concentration of 100, 10, 1, 0.1 or 0.01 microg/ml to the medium of primary cultured hepatocytes. Ce...

journal_title：Toxicology

authors： Mikami O,Yamamoto S,Yamanaka N,Nakajima Y

更新日期：2004-11-15 00:00:00

abstract：:The mechanism underlying the induction of micronuclei induced by rifampicin and nicotine in mouse bone marrow was investigated by fluorescence in situ hybridization assay using mouse minor satellite DNA probe. Colchicine and mitomycin, known to be predominantly clastogenic and aneugenic, respectively were used as posi...

journal_title：Toxicology

authors： Attia SM

更新日期：2007-06-03 00:00:00

abstract：:Five male and female rats per dose-group received 2,3,7,8-tetrabromodibenzo-p-dioxin (2,3,7,8-TBDD) once on the first day of the study. Doses of 10, 33, 100, or 300 micrograms 2,3,7,8-TBDD/kg body wt. and the vehicle control were administered by gavage. About 20% of 2,3,7,8-TBDD was excreted via feces. Severe body wei...

journal_title：Toxicology

authors： Ivens IA,Löser E,Rinke M,Schmidt U,Neupert M

更新日期：1992-01-01 00:00:00

abstract：:To elucidate factors responsible for altered proliferation of preneoplastic hepatocytes in rat hepatocarcinogenesis in vivo, EGF-stimulated DNA synthesis of normal and nodular hepatocytes in primary culture was studied. In addition, the influence of 2,3,7, 8-tetrachlorodibenzo-p-dioxin (TCDD) was investigated to clari...

journal_title：Toxicology

authors： Bock KW,Gschaidmeier H,Bock-Hennig BS,Eriksson LC

更新日期：2000-04-03 00:00:00

abstract：:Antimony compounds are widely used in various manufacturing and semiconducting industries. Previously, it has been shown that antimony trichloride (SbCl3) elevates sister chromatid exchange (SCE) rates in V79 cells after a 28-h incubation. However, only limited data on its genotoxic effects are available so far. The p...

journal_title：Toxicology

authors： Huang H,Shu SC,Shih JH,Kuo CJ,Chiu ID

更新日期：1998-08-21 00:00:00

abstract：:We have investigated in the current study, the possible modulatory effects of dexamethasone on cisplatin cytotoxicity in Ehrlich ascites carcinoma (EAC)-bearing female Swiss albino mice. Cisplatin (3.5mg/kg) was injected IP for 3 consecutive days in mice previously inoculated SC with EAC cells in the right flank. Dexa...

journal_title：Toxicology

authors： Arafa HM,Abdel-Hamid MA,El-Khouly AA,Elmazar MM,Osman AM

更新日期：2006-05-01 00:00:00

abstract：:Pregnant CD-1 mice were administered a commercial 2,4-dichlorophenoxyacetic acid (2,4-D) formulation on days 6-16 days of gestation, in drinking water at concentrations ranging from 0 to 1.0% of the formulated product, equivalent to approximately 0-650 mg/kg per day expressed as the amine derivative. The effect of 2,4...

journal_title：Toxicology

authors： Lee K,Johnson VL,Blakley BR

更新日期：2001-08-13 00:00:00

abstract：:Urinary dialkylphosphates (DAPs) are measured to assess exposure to organophosphorus pesticides (OPs), but they are common metabolites of OPs and not specific indices for individual agents. Biomonitoring (BM) of urinary DAPs has been widely adopted as an assessment of individual exposure in general environments, howev...

journal_title：Toxicology

authors： Sato H,Ito Y,Hanai C,Nishimura M,Ueyama J,Kamijima M

更新日期：2021-01-15 00:00:00

abstract：:Increased antigen-specific IgE expression is a hallmark of the allergic response in mice. IgG1 may also be involved. Co-injection of mice with diesel exhaust particles (DEP) and ovalbumin three times over a 2 week period lead to a rapid and marked elevation of ovalbumin-specific IgE, IgG1 and also IgG2a, compared with...

journal_title：Toxicology

authors： Heo Y,Saxon A,Hankinson O

更新日期：2001-02-28 00:00:00

abstract：:Extracts from the leaves of Ginkgo biloba L. belong to the most widely used phytopharmaceuticals. In crude Ginkgo extracts, ginkgolic acids (GA) and related alkylphenols (e.g. cardanols and cardols) have been recognized as hazardous compounds with suspected cytotoxic, allergenic, mutagenic and carcinogenic properties....

journal_title：Toxicology

authors： Hecker H,Johannisson R,Koch E,Siegers CP

更新日期：2002-08-15 00:00:00

abstract：:Previous studies have shown that magnesium, unlike calcium, prevents cadmium carcinogenesis at the subcutaneous injection site, and that neither magnesium nor calcium has any significant influence on the production of testicular tumors by cadmium in rats. The present investigation attempts to disclose the nature of th...

journal_title：Toxicology

authors： Kasprzak KS,Poirier LA

更新日期：1985-03-15 00:00:00