Abstract:
:Transferrin, as the major iron-transport protein in serum and other body fluids, has a central role in managing iron the body receives. Liver is a major site of transferrin synthesis, and in this study we present evidence that liver synthesis of human transferrin is suppressed by both the toxic metal lead and bacterial lipopolysaccharide, an inducer of the hepatic acute phase response. The responses of intact endogenous transferrin in the human hepatoma cell line HepG2 and chimeric human transferrin-chloramphenicol acetyltransferase genes in transgenic mice were examined. In HepG2 cells, 35S-transferrin protein synthesis and mRNA levels were suppressed by 100 microM and 10 microM lead acetate as early as 24 h after the initial treatment. Yet, synthesis of two proteins known to respond in the hepatic acute phase reaction, complement C3 and albumin, was not altered by the lead treatment. In transgenic mouse liver, lead suppressed expression of chimeric human transferrin genes at both the protein and mRNA levels, but LPS only suppressed at the protein level. The study indicates that lead suppresses human transferrin synthesis by a mechanism that differs from the hepatic acute phase response and that lead may also affect iron metabolism in humans by interfering with transferrin levels.
journal_name
Toxicologyjournal_title
Toxicologyauthors
Barnum-Huckins KM,Martinez AO,Rivera EV,Adrian EK Jr,Herbert DC,Weaker FJ,Walter CA,Adrian GSdoi
10.1016/s0300-483x(96)03586-xsubject
Has Abstractpub_date
1997-03-14 00:00:00pages
11-22issue
1eissn
0300-483Xissn
1879-3185pii
S0300483X9603586Xjournal_volume
118pub_type
杂志文章相关文献
TOXICOLOGY文献大全abstract::One of the most sensitive and reproducible immunotoxic endpoints of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) exposure is suppression of the antibody response to sheep red blood cells (SRBCs) in mice. Immunosuppression occurs in concert with hepatomegaly and associated induction of several hepatic cytochrome P450 enz...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2003.11.016
更新日期:2004-04-01 00:00:00
abstract::Inhibition of regulated exocytosis by botulinum toxins type A and B was studied in chromaffin cells. Both virtually abolished catecholamine release triggered from intact cells by depolarising stimuli, whereas the blockade by type A, but not B, was only partial after cell permeabilisation and direct stimulation of exoc...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/s0300-483x(02)00453-5
更新日期:2002-12-27 00:00:00
abstract::The effect of dose and duration of treatment with chromium on its distribution in certain vital organs and the blood of rats has been investigated. The accumulation of metal was highest in liver and kidneys, followed by testes, brain and blood and was rather more dependent on the dose than on the duration of exposure....
journal_title:Toxicology
pub_type: 杂志文章
doi:
更新日期:1979-05-01 00:00:00
abstract::Sodium fluoride (NaF) is widely used for the treatment of dental caries and dentin hypersensitivity. However, its pro-apoptotic effect on odontoblasts may lead to harmful side-effects. The purpose of this study was to evaluate the pro-apoptotic effects of NaF in odontoblasts and elucidate the possible underlying molec...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2013.03.016
更新日期:2013-06-07 00:00:00
abstract::Exposure to polycyclic aromatic hydrocarbons (PAHs) always involves complex mixtures that may induce synergistic or antagonistic effects on the genotoxic properties and make risk assessment more difficult. In this study, we evaluated how particulate PAHs modulated the formation of DNA damage induced by carcinogenic be...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2010.09.002
更新日期:2011-01-11 00:00:00
abstract::Deltamethrin is a synthetic pyrethroid insecticide used worldwide in agriculture, home pest control, protection of foodstuff and disease vector control. The objective of this study was to investigate the propensity of deltamethrin to induce oxidative stress and changes in biochemical parameters and enzyme activities i...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2006.08.008
更新日期:2006-10-29 00:00:00
abstract::Ochratoxin A (OTA) is a mycotoxin produced by several fungi which grow on human food source material. Consumption of OTA is almost unavoidable. The consumption leads to low but detectable amounts of OTA in human blood. Risk assessment of OTA is based on studies performed either in animals or cultured cells. So far, ma...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2006.12.008
更新日期:2007-03-22 00:00:00
abstract::Different affinities of blood for CO were observed in in vivo and in vitro experiments. Hamsters showed the greatest relative affinity (1.0), the corresponding value for rats was 0.8, for pigs 0.74 and for rabbits 0.58. The upward shift of the saturation curves was dependent on the rate of respiratory exchange per uni...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/0300-483x(75)90031-1
更新日期:1975-01-01 00:00:00
abstract::A number of studies reported that the MTS in vitro cytotoxicity assay is a convenient method for assessing cell viability. The main features found with this assay are its ease of use, accuracy and rapid indication of toxicity. It might well be a useful tool in human health risk assessment if it can be shown that this ...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/s0300-483x(97)00151-0
更新日期:1997-12-31 00:00:00
abstract::Enantioselectivity in toxicology, and health risk of chiral xenobiotics have become important topics at the forefront of chemistry and toxicology research. Our previous results showed that cis-bifenthrin (cis-BF) induced cytotoxicity and genotoxicity in human amnion epithelial (FL) cells, in an enantioselective manner...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2009.05.002
更新日期:2009-07-10 00:00:00
abstract::The influence of the insertion of a liver into the perfusion circuit of a lung on the availability of benzo[a]pyrene and benzo[a]pyrene metabolites to the lung was examined. Perfused lungs from 5,6-benzoflavone pretreated rats release high quantities of free benzo[a]pyrene metabolites and conjugates into the perfusion...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/0300-483x(87)90100-4
更新日期:1987-08-01 00:00:00
abstract:OBJECTIVE:Ozone has become a major air pollutant in recent years, which leading to a variety of lung diseases. This study aimed to explore the mechanisms of pyroptosis and related signaling pathways in ozone-induced lung injury. METHODS:We exposed 120 Wistar rats to ozone, 20 in each group (half male and half female)....
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2020.152668
更新日期:2020-12-28 00:00:00
abstract::Aluminium has been implicated in various neurodegenerative diseases but exact mechanism of action is still not known. Mitochondria being a major site of reactive oxygen species production are considered to be target of oxidative stress and it seems that the oxidative damage to mitochondrial proteins may underlie the p...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2008.10.009
更新日期:2009-01-31 00:00:00
abstract::The developing nervous system is susceptible to lead (Pb) exposure but less is known about the effect of this toxic agent in adult rat brain. Since astrocytes serve as a cellular Pb deposition site, it is of importance to investigate the response of astroglial cells in the adult rat brain in a model of acute lead expo...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/s0300-483x(01)00415-2
更新日期:2001-08-28 00:00:00
abstract::Phthalate esters belong to a large class of compounds known as peroxisome proliferators (PP). PP include chemicals that activate different subtypes of the peroxisome proliferator-activated receptor (PPAR) family. The ability of phthalate esters and their metabolites to activate responses through different PPAR subtype...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2004.09.008
更新日期:2005-02-01 00:00:00
abstract::Cisplatin is used as a cytotoxic agent for the management of cervical cancer. However, the severity of the side-effects limits the use of this drug, particularly at high doses. Resistance to cisplatin is often attributed to a disruption in the normal apoptotic response via aberrant activation of pathways such as the m...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2015.07.010
更新日期:2015-09-01 00:00:00
abstract::The therapy of organophosphorus compound (OP) poisoning is still a challenge to clinical toxicologists. To alleviate peripheral respiratory failure oximes, e.g. obidoxime and pralidoxime, are used to reactivate inhibited acetylcholinesterase (AChE) with the intention to restore the disturbed neuromuscular function. In...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2010.04.002
更新日期:2010-06-04 00:00:00
abstract::A recent epidemiological study showed an increased risk for bone fractures after chronic low-level cadmium exposure. This finding agrees with those of cadmium accumulation in rat bones after chronic oral exposure which reduced the mechanical strength of the bones. There are indications that ossicular cadmium uptake ma...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/s0300-483x(00)00364-4
更新日期:2001-02-21 00:00:00
abstract::Ethyl tertiary butyl ether (ETBE) is biofuel additive recently used in Japan and some other countries. Limited evidence shows that ETBE has low toxicity. Acetaldehyde (AA), however, as one primary metabolite of ETBE, is clearly genotoxic and has been considered to be a potential carcinogen. The aim of this study was t...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2013.06.005
更新日期:2013-09-15 00:00:00
abstract::Male Wistar rats injected i.p. with 30 mg Fe2+/kg body weight show hepatic damage as measured by an increase in lipid peroxides which correlated with elevated serum enzymes, alanine aminotransferase (ALAT), aspartate aminotransferase (ASAT) and lactate dehydrogenase (LDH). Oral administration of spice principles, curc...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/0300-483x(95)03199-p
更新日期:1996-01-22 00:00:00
abstract::We recently reported that Delta(9)-tetrahydrocannabinol (Delta(9)-THC) has the ability to stimulate the proliferation of human breast carcinoma MCF-7 cells. However, the mechanism of action remains to be clarified. The present study focused on the relationship between receptor expression and the effects of Delta(9)-TH...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2007.12.019
更新日期:2008-03-12 00:00:00
abstract::The lipid regulator gemfibrozil (GEM) is one of many human pharmaceuticals found in the aquatic environment. We previously demonstrated that GEM bioconcentrates in blood and reduces plasma testosterone levels in goldfish (Carassius auratus). In this study, we address the potential of an environmentally relevant waterb...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2006.08.025
更新日期:2006-12-07 00:00:00
abstract::Oxybutynin hydrochloride, an anti-cholinergic/anti-spasmodic agent, was examined for its effect on fertility and peri-post natal development in the rat and its embryotoxic potential in the rat and rabbit. In the rat effects on reproductive performance included a slight increase in the incidence of foetal malformations...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/0300-483x(86)90044-2
更新日期:1986-07-01 00:00:00
abstract::In an attempt to assess the effect of ethanol on cadmium accumulation, metallothionein (MT) synthesis, Cd-binding capacity and lipid peroxidation, rats were administered either Cd, ethanol or their combination for a period of 4 weeks. A significant increase in Cd accumulation was observed in all the organs of rats und...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/0300-483x(92)90177-g
更新日期:1992-01-01 00:00:00
abstract::The involvement of metallothionein (MT) in the nephrotoxicity of cis-diamminedichloroplatinum (c-DDP) was investigated in rats using enzyme excretion and histology as indicators of renal damage. In addition, the effects of renal glutathione (GSH) depletion on the nephrotoxicity of c-DDP was assessed by organic anion t...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/0300-483x(90)90129-5
更新日期:1990-11-01 00:00:00
abstract::The present study was designed to examine more fully the neurochemical and behavioral interactions that derive from continued lead and cadmium poisoning in pups, whose mothers were exposed via drinking water (300 mg/l of Pb and 10 mg/l of Cd) throughout pregnancy and lactation. At weaning, these metals produced an inc...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/s0300-483x(02)00137-3
更新日期:2002-07-01 00:00:00
abstract::Metallothionein, a low molecular weight cadmium-binding protein, has been determined for the first time in urine of "itai-itai" disease patients and other Japanese women environmentally exposed to cadmium. On a group basis, the urinary metallothionein levels of "itai-itai" disease patients and suspected patients were ...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/0300-483x(81)90036-6
更新日期:1981-01-01 00:00:00
abstract::Pyrethroids are a class of insecticides involved in different neurological disorders. They cross the blood-brain barrier and exert their effect on dopaminergic system, contributing to the burden of oxidative stress in Parkinson's disease through several pathways. The aim of the present study was to evaluate the effect...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2006.10.015
更新日期:2007-01-18 00:00:00
abstract::The majority of human P450-dependent xenobiotic metabolism is carried out by polymorphic enzymes which can cause abolished, quantitatively or qualitatively altered or enhanced metabolism. The latter situation is due to stable duplication, multiduplication or amplification of active genes, most likely in response to di...
journal_title:Toxicology
pub_type: 杂志文章,评审
doi:10.1016/s0300-483x(02)00492-4
更新日期:2002-12-27 00:00:00
abstract::Increasing experimental and clinical evidence suggest a contribution of non-drug related risk factors (e.g., underlying disease, bacterial/viral infection) to idiosyncratic drug reactions (IDR). Our previous work showed that co-treatment with bacterial endotoxin (LPS) and therapeutic doses of diclofenac (Dcl), an anal...
journal_title:Toxicology
pub_type: 杂志文章
doi:10.1016/j.tox.2015.03.004
更新日期:2015-05-04 00:00:00