Abstract:
:The Constitutive Androstane Receptor (CAR, NR1I3) has been newly described as a regulator of energy metabolism. A relevant number of studies using animal models of obesity suggest that CAR activation could be beneficial on the metabolic balance. However, this remains controversial and the underlying mechanisms are still unknown. This work aimed to investigate the effect of CAR activation on hepatic energy metabolism during physiological conditions, i.e. in mouse models not subjected to metabolic/nutritional stress. Gene expression profiling in the liver of CAR knockout and control mice on chow diet and treated with a CAR agonist highlighted CAR-mediated up-regulations of lipogenic genes, concomitant with neutral lipid accumulation. A strong CAR-mediated up-regulation of the patatin-like phospholipase domain-containing protein 3 (Pnpla3) was demonstrated. Pnpla3 is a gene whose polymorphism is associated with the pathogenesis of nonalcoholic fatty liver disease (NAFLD) development. This observation was confirmed in human hepatocytes treated with the antiepileptic drug and CAR activator, phenobarbital and in immortalized human hepatocytes treated with CITCO. Studying the molecular mechanisms controlling Pnpla3 gene expression, we demonstrated that CAR does not act by a direct regulation of Pnpla3 transcription or via the Liver X Receptor but may rather involve the transcription factor Carbohydrate Responsive Element-binding protein. These data provide new insights into the regulation by CAR of glycolytic and lipogenic genes and on pathogenesis of steatosis. This also raises the question concerning the impact of drugs and environmental contaminants in lipid-associated metabolic diseases.
journal_name
Toxicol Appl Pharmacoljournal_title
Toxicology and applied pharmacologyauthors
Marmugi A,Lukowicz C,Lasserre F,Montagner A,Polizzi A,Ducheix S,Goron A,Gamet-Payrastre L,Gerbal-Chaloin S,Pascussi JM,Moldes M,Pineau T,Guillou H,Mselli-Lakhal Ldoi
10.1016/j.taap.2016.05.006subject
Has Abstractpub_date
2016-07-15 00:00:00pages
90-100eissn
0041-008Xissn
1096-0333pii
S0041-008X(16)30112-0journal_volume
303pub_type
杂志文章abstract::In order to visualize the distribution of HI-6 in the rat after iv administration, autoradiographic experiments were carried out with [14C]HI-6, labeled at the carbon of the carboxamide moiety. Autoradiography clearly confirms penetration of HI-6 into the central nervous system. Considerable radioactivity was found in...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(88)90392-4
更新日期:1988-02-01 00:00:00
abstract::The biological activities of the polysaccharide have attracted more and more attention in the biochemical and medical areas due to their anti-cancer effects. To estimate the anti-tumor mechanism of MAP, a novel polysaccharide from the loach, Misgurnus anguillicaudatus, the apoptosis effects of the polysaccharide on th...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2005.04.019
更新日期:2006-02-01 00:00:00
abstract::This study was conducted to evaluate UDP-glucuronosyl-transferase (UDP-GT) activity, UDP-glucuronic acid (UDP-GA) concentration, and UDP-glucose (UDPG) concentration in the rat intestine and liver following oral administration of butylated hydroxyanisole (BHA), benzo[a]pyrene (BaP), 3-methylcholanthrene (3MC), phenoba...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(92)90330-u
更新日期:1992-08-01 00:00:00
abstract::Rats were given an ip injection of T-2 mycotoxin (T-2), the T-2 metabolite, T-2 tetraol (tetraol), or cycloheximide. Serum, liver, heart, kidney, spleen, muscle, and intestine were collected at 3, 6, and 9 hr postinjection after a 2-hr pulse at each time with [14C]leucine and [3H]thymidine. Protein and DNA synthesis l...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(90)90151-j
更新日期:1990-09-15 00:00:00
abstract::Prior consumption of a diet containing the food antioxidant, butylated hydroxyanisole (BHA), by female mice prevented the development of or minimized the acute liver damage caused by monocrotaline, acetaminophen, or bromobenzene. In contrast, neither the incidence nor the severity of carbon tetrachloride-induced hepat...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(83)90121-7
更新日期:1983-06-15 00:00:00
abstract::Calcium channel blockers (CCBs) are important in the management of hypertension and limit restenosis. Although CCB efficacy could derive from decreased blood pressure, other mechanisms independent of CCB activity also can contribute to antiproliferative action. To understand mechanisms of CCB-mediated antiproliferatio...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2012.04.036
更新日期:2012-08-01 00:00:00
abstract::The teleost swim bladder is assumed a homolog of the tetrapod lung. Both swim bladder and lung are developmental targets of persistent aryl hydrocarbon receptor (AHR(2)) agonists; in zebrafish (Danio rerio) the swim bladder fails to inflate with exposure to 3,3',4,4',5-pentachlorobiphenyl (PCB126). The mechanism for t...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2012.09.023
更新日期:2012-12-01 00:00:00
abstract::The most commonly used chemical mixtures risk assessment methods involve simple notions of additivity and toxicological similarity. Newer methods are emerging in response to the complexities of chemical mixture exposures and effects. Factors based on both science and policy drive decisions regarding whether to conduct...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.taap.2006.07.010
更新日期:2007-09-01 00:00:00
abstract::Exposure to excessive manganese (Mn) levels leads to neurotoxicity, referred to as manganism, which resembles Parkinson's disease (PD). Manganism is caused by neuronal injury in both cortical and subcortical regions, particularly in the basal ganglia. The basis for the selective neurotoxicity of Mn is not yet fully un...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2011.06.001
更新日期:2011-11-01 00:00:00
abstract::The immunosuppressive effects of polycyclic aromatic hydrocarbons (PAHs) on immune responses in rodents, both in vivo and in vitro, have been widely documented. However, few studies have addressed the immunotoxicity of PAHs in the human system. In this report, we examined the toxic effects of nine different PAHs on hu...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1006/taap.1996.0173
更新日期:1996-08-01 00:00:00
abstract::Phenobarbital (PB) is an effective growth stimulator of hepatic hyperplastic nodules developed with diethylnitrosamine and 2-acetylaminofluorene plus partial hepatectomy (the Solt-Farber model), but it does not apparently stimulate the growth of preneoplastic lesions produced with aflatoxin B1 (AFB). Some studies have...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(91)90142-2
更新日期:1991-10-01 00:00:00
abstract::Propiconazole is a mouse hepatotumorigenic fungicide designed to inhibit CYP51, a key enzyme in the biosynthesis of ergosterol in fungi and is widely used in agriculture to prevent fungal growth. Metabolomic studies in mice revealed that propiconazole increased levels of hepatic cholesterol metabolites and bile acids,...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2012.02.003
更新日期:2012-04-15 00:00:00
abstract::Often, chemotherapy by doxorubicin (Adriamycin) is limited due to life threatening cardiotoxicity in patients during and posttherapy. Recently, we have shown that moderate diet restriction remarkably protects against doxorubicin-induced cardiotoxicity. This cardioprotection is accompanied by decreased cardiac oxidativ...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2008.05.006
更新日期:2008-09-15 00:00:00
abstract::Interference of exogenous chemicals with the aromatase enzyme can be useful as a tool to identify chemicals that could act either chemopreventive for hormone-dependent cancer or adverse endocrine disruptive. Aromatase is the key enzyme in the biosynthesis of steroids, as it converts androgens to estrogens. Certain fla...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2007.12.007
更新日期:2008-05-01 00:00:00
abstract::The differential effects of oral and dermal administration of single doses of 100 to 1000 mg/kg S,S,S-tri-n-butyl phosphorotrithioate (DEF) on nonspecific esterases and liver metabolism enzymes were investigated one day following administration. O,O-Diethyl O-(4-nitrophenyl) phosphorothioate (parathion) and tri-o-cres...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(84)90336-3
更新日期:1984-04-01 00:00:00
abstract::Adult cynomolgus monkeys were administered trimethyltin (TMT) iv in dosages ranging from 0.75 to 4.0 mg TMT/kg and observed for behavioral changes. Animals were subsequently killed for light and electron microscopic examination. TMT showed a dose-related toxicity, with high dose animals (4.0 and 3.0 mg/kg) dying withi...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(85)90141-3
更新日期:1985-07-01 00:00:00
abstract::6-Hydroxy-trans,trans-2,4-hexadienal (CHO-M-OH) is a metabolite of trans,trans-muconaldehyde (muconaldehyde or MUC), a microsomal hematotoxic ring-opened metabolite of benzene. In the present study, the toxicity of CHO-M-OH was examined. In order to assess potential toxic effects of CHO-M-OH on the maturation of eryth...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1006/taap.1995.1101
更新日期:1995-06-01 00:00:00
abstract::Four chemicals that are known to induce in rats thyroid follicular-cell adenomas and carcinomas were assayed for their ability to induce DNA damage and DNA repair synthesis in primary cultures of human thyroid cells. Significant dose-dependent increases in the frequency of DNA single-strand breaks and alkali-labile si...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2004.07.009
更新日期:2005-03-01 00:00:00
abstract::Acetaminophen (APAP) nephrotoxicity has been observed both in humans and research animals. Recent studies suggest a contributory role for glutathione (GSH)-derived conjugates of APAP in the development of nephrotoxicity. Inhibitors of either gamma-glutamyl transpeptidase (gamma-GT) or the probenecid-sensitive organic ...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2004.06.030
更新日期:2005-01-15 00:00:00
abstract::Mitochondrial oxidative stress plays important roles in aging and age-related degenerative disorders. The newly identified mitochondrial thioredoxin (mtTrx; Trx2) is a key component of the mitochondrial antioxidant system which is responsible for the clearance of reactive intermediates and repairs proteins with oxidat...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2006.05.006
更新日期:2006-10-15 00:00:00
abstract::L-Buthionine-S,R-sulfoximine (BSO), a potent inhibitor of gamma-glutamylcysteine synthetase, is commonly used as an experimental tool for the specific depletion of glutathione. Since cysteine is a key precursor for glutathione biosynthesis, we investigated the possibility that BSO might also affect the free cysteine p...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(91)90208-v
更新日期:1991-02-01 00:00:00
abstract::Catechol-O-methyltransferase (COMT) acts as a 'gate-keeper' to prevent DNA damage during estrogen metabolism. Both experimental and epidemiological studies suggest the role of COMT in pathogenesis of human breast cancer (BCa). It was previously reported that inhibition of COMT enzyme activity in estradiol-treated huma...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2019.01.016
更新日期:2019-03-15 00:00:00
abstract::Prescribing appropriate Tacrolimus (Tac) dosing is still a challenge for clinicians due to the interindividual variability in dose requirement and the narrow therapeutic index. Our objective is to identify potential factors that affects Tac exposure in Tunisian Kidney patients and to develop and validate a Tac dose re...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2020.115245
更新日期:2020-11-15 00:00:00
abstract::A number of chemicals cause a nephrotoxic syndrome in male rats, referred to as protein droplet or alpha 2u-globulin (alpha 2u) nephropathy. To evaluate the potential human risk for developing a similar chemically-induced protein-mediated nephrotoxic response, the low-molecular-weight protein fraction (LMWPF) was isol...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1006/taap.1993.1064
更新日期:1993-04-01 00:00:00
abstract::Oxidative damage to DNA induced by benzene is an important mechanism of its genotoxicity, which leads to chronic benzene poisoning (CBP). Therefore, genetic variation in DNA repair genes may contribute to susceptibility to CBP in the exposed population. We hypothesized that single nucleotide polymorphisms (SNPs) in hM...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2008.09.008
更新日期:2008-12-15 00:00:00
abstract::Diethyl maleate (DEM) pretreatment has previously been shown to result in a transient depletion of lung glutathione and an associated decrease of the time to the onset of rat mortality resulting from exposures to 100% oxygen in vivo. The effects of oxygen exposure on mitochondrial energy metabolism were assessed by me...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/0041-008x(92)90319-n
更新日期:1992-08-01 00:00:00
abstract::We evaluated the inhibition of striatal cholinesterase activity following intracerebral administration of paraoxon assaying activity either in tissue homogenates ex vivo or by substrate hydrolysis in situ. Artificial cerebrospinal fluid (aCSF) or paraoxon in aCSF was infused unilaterally (0.5 microl/min for 2 h) and i...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2009.02.022
更新日期:2009-05-01 00:00:00
abstract::Environmental risk assessment requires models for estimating the bioaccumulation of untested compounds. So far, bioaccumulation models have focused on lipophilic compounds, and only a few have included hydrophilic compounds. Our aim was to extend an existing bioaccumulation model to estimate the oral uptake efficiency...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2012.10.015
更新日期:2013-01-01 00:00:00
abstract::To study the interaction of retinoid-induced limb defects and cleft palate on day 11 of gestation, a RXR-selective agonist (AGN191701, an arylpropenyl-thiophene-carboxylic acid derivative, 20 mg/kg orally) was coadministered with a RARalpha-agonist (Am580, an arylcarboxamidobenzoic acid derivative, 5 mg/kg orally) to ...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1006/taap.2000.9074
更新日期:2001-01-01 00:00:00
abstract::Zinc oxide (ZnO) particle induced cytotoxicity was dependent on size, charge and solubility, factors which at sublethal concentrations may influence the activation of the human monocytic cell line THP1. ZnO nanoparticles (NP; average diameter 70nm) were more toxic than the bulk form (<44μm mesh) and a positive charge ...
journal_title:Toxicology and applied pharmacology
pub_type: 杂志文章
doi:10.1016/j.taap.2012.10.020
更新日期:2013-01-01 00:00:00