Abstract：
:Cyclic AMP (c-AMP), added on its own to rat hepatocyte cultures, caused a marked accumulation of coproporphyrin III. The results obtained by comparing the effect of c-AMP to that of exogenous 5-aminolevulinate (ALA), and from adding c-AMP and ALA together, indicated that the coproporphyrinogen III metabolism was blocked, even though no inhibition of the relevant enzyme, coproporphyrinogen oxidase, could be demonstrated. Preferential accumulation of coproporphyrin could also be produced in cultures of rat hepatocytes by agents that raise the cellular levels of cyclic AMP, such as glucagon. The effect of supplementing the culture medium with triiodothyronine (T3) on the response of rat hepatocytes to c-AMP was also investigated. T3, which is known to stimulate mitochondrial respiration, uncoupling O2 consumption from ATP synthesis, produced a c-AMP-like effect when given on its own and potentiated the effect of c-AMP, with an apparent increase in the severity of the metabolic block. It is suggested that an oxidative mechanism may be activated in c-AMP and T3-induced coproporphyria, preferentially involving the mitochondrial compartment, leading to oxidation of porphyrinogen intermediates of haem biosynthesis, especially coproporphyrinogen. Coproporphyin, the fully oxidized aromatic derivative produced, cannot be metabolized and will therefore accumulate.
journal_name
Arch Toxicoljournal_title
Archives of toxicologyauthors
De Matteis F,Harvey Cdoi
10.1007/s00204-004-0637-1keywords:
subject
Has Abstractpub_date
2005-07-01 00:00:00pages
381-9issue
7eissn
0340-5761issn
1432-0738journal_volume
79pub_type
杂志文章abstract：:To examine the demethylation reaction of methylmercury (MeHg) in rat liver, slices prepared from MeHg-treated rats were incubated in L-15 medium under 95% O2/5% CO2 atmosphere. During the incubation, the amount of inorganic Hg in the slices markedly increased in a time-dependent manner, although the concentration of t...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s002040100256
更新日期：2001-09-01 00:00:00
abstract：:Many carcinogens and mutagens are electrophilic in nature and will react with nucleophilic sites in protein and nucleic acid. Determination of the extent of formation of these adducts of genotoxic agents with protein provides a practical method of monitoring human exposure and of determining the possible risk associat...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/BF00296978
更新日期：1987-01-01 00:00:00
abstract：:Since tattoos became overwhelmingly fashionable worldwide, the demand for removal has proportionally increased, Nd:YAG Q-switch laser being the most commonly used tool for the purpose. In this framework we investigated the composition and products of laser treatment of green tattoo ink, the Green Concentrate from Eter...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-020-02790-7
更新日期：2020-07-01 00:00:00
abstract：:The OECD has developed an "enhanced Test Guideline 407" (TG 407) protocol for detecting endocrine effects during the course of a 28-day testing scheme. This protocol has gone through a validation process with (anti)estrogenic and (anti)androgenic compounds and substances that affect the thyroid (thyroxine and propylth...
journal_title：Archives of toxicology
pub_type： 杂志文章,评审
doi：10.1007/s00204-004-0644-2
更新日期：2005-07-01 00:00:00
abstract：:The influence of pivalic acid (PIV), a compound often used to make pro-drugs, and of the structurally related trichloroacetic acid (TCA), on several hepatic and renal enzymes was investigated in Sprague-Dawley rats, following a 4-day treatment period. The PIV and TCA treatments resulted in a similar and selective indu...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s002040050253
更新日期：1996-01-01 00:00:00
abstract：:The amphetamine-derived designer drugs have been illegally used worldwide as recreational drugs, some of which are known to be hepatotoxic in humans. To compare their cytotoxic effects, 3,4-methylenedioxy-N-methamphetamine (MDMA) and its related analogues, N-methyl-1-(3,4-methylenedioxyphenyl)-2-butanamine (MBDB), 3,4...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-008-0323-9
更新日期：2009-01-01 00:00:00
abstract：:Carcinogenic risk and molecular mechanisms underlying the liver tumor-promoting activity of copper gluconate, an additive of functional foods, were investigated using a rat medium-term liver carcinogenicity bioassay protocol (Ito test) and a 2-week short-term administration experiment. In the medium-term liver bioassa...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-008-0294-x
更新日期：2008-08-01 00:00:00
abstract：:The cardiovascular effects were investigated after acute and subacute treatment with chlorodibromomethane (CDBM; 0.4 to 3.2 mmol/kg p.o.), trichloromethane (TCM; 0.31 and 1.25 mmol/kg p.o.) and mixtures of CDBM and TCM (acute, 0.8 mmol CDBM/kg + 1.25 mmol TCM/kg p.o.; subacute, 0.4 mmol CDBM/kg + 0.31 mmol TCM/kg p.o....
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s002040050459
更新日期：1997-01-01 00:00:00
abstract：:Between 0.25-25 micrograms of an aqueous solution of either mercuric chloride or methyl mercuric acetate was injected directly into the sciatic nerve of 28 adult Wistar rats. The resultant pathological changes in the nerve were examined by teasing individual fibres and by light and electron microscopy. In most respect...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/BF00310442
更新日期：1980-12-01 00:00:00
abstract：:In vivo screening methods for detection of thyroid function modulators are now under development in many research laboratories. We assessed the applicability of the Hershberger assay protocol to screen for thyroid function modulators. In experiment 1, castrated male BrlHan WIST@Jcl (GALAS) rats were administered a pot...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-005-0677-1
更新日期：2005-11-01 00:00:00
abstract：:Cadmium chloride was administered by gavage to female rats 5 days a week for 5 weeks, then during mating and gestation periods at doses of 0.04, 0.4, and 4 mg Cd/kg/day. Treatment with cadmium neither affected the survival and fertility of females, nor produced overt fetotoxic effects. Fetal cadmium concentration was ...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/BF01234482
更新日期：1983-12-01 00:00:00
abstract：:The present experiments were performed to test the possibility of interrupting the enterohepatic circulation of arsenic (As). Therefore the efficacy of adsorbents to bind As and/or As-DMPS adducts in vitro and their effect on the excretion of As into the feces and urine in vivo were investigated after injection of As2...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s002040050237
更新日期：1995-01-01 00:00:00
abstract：:The release and availability of the carcinogenic component of the soluble azo dye Direct Red 46 and the insoluble azo pigment Pigment Yellow 17 were analyzed in Wistar rats using hemoglobin adducts as a dosimeter. The levels of hemoglobin adducts were found to be very low. Intestinal cleavage and release of 3,3'-dichl...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s002040050024
更新日期：1994-01-01 00:00:00
abstract：:Single doses of procarbazine (MIH) were injected IP at 0, 50, 100, 200, and 400 mg/kg body weight to CD-1 male mice. Activities of hyaluronidase, lactate dehydrogenase isoenzyme-X, and the dehydrogenases of sorbitol, alpha-glycerophosphate, glucose-6-phosphate, malate, isocitrate, and glyceraldehyde-3-phosphate in the...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/BF00341017
更新日期：1984-10-01 00:00:00
abstract：:A wide variety of immunosuppressive effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in experimental animals has been documented. In contrast, the impact of dioxin on the human immune system remains controversial, although adverse health effects have been reported in humans after occupational or accidental exposu...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s002040050072
更新日期：1994-01-01 00:00:00
abstract：:In case of mycotoxin contaminations, food and feedstuff are usually contaminated by more than one toxin. However toxicological data concerning the effects of mycotoxin combinations are sparse. The intestinal epithelium is the first barrier against food contaminants and this constantly renewing organ is particularly se...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-014-1309-4
更新日期：2015-08-01 00:00:00
abstract：:Male F344/DuCrj (Fischer) rats were given bisphenol A (BPA) in the diet at levels of 0 (control), 0.25, 0.50 and 1.00%, equivalent to 0, 235, 466 and 950 mg/kg per day, respectively, for 44 days. Body weight gains were depressed dose-dependently in BPA-treated rats, and those of 0.50 and 1.00% groups were significant....
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s002040000204
更新日期：2001-03-01 00:00:00
abstract：:Certain populations of the mosquitofish (Gambusia affinis) are highly resistant to cyclodiene and cyclodiene-type insecticides that competitively interact with the picrotoxinin binding site of the gamma-aminobutyric acid (GABA) receptor-ionophore complex in the central nervous system. Resistance involves a reduction i...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/BF00332493
更新日期：1988-01-01 00:00:00
abstract：:Most dietary flavonoids have antioxidant activity in vitro however, secondary mechanisms such as the ability to influence gene expression with the consequent modulation of specific enzymatic activities involved in the intracellular response against oxidative stress, are being realized. In the following study, we exami...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-007-0210-9
更新日期：2007-11-01 00:00:00
abstract：:A compound was isolated from the urine of workers exposed to carbon disulfide during the production of rayon. The compound was identified as 2-thiothiazolidine-4-carboxylic acid (TTCA) by GC/MS and NMR. A HPLC method for the quantitative determination of TTCA was elaborated and applied to urine samples. The method all...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/BF00297130
更新日期：1981-03-01 00:00:00
abstract：:Oxime-type acetylcholinesterase reactivators (oxime-AChER) are used as an adjunct in the treatment for organophosphorus anticholinesterase poisoning. Because of the widespread usage and exposure of organophosphorus compounds (OPCs), its poisoning and fatalities is obvious in pregnant women, embryos and fetuses. OPCs i...
journal_title：Archives of toxicology
pub_type： 杂志文章,评审
doi：10.1007/s00204-013-1160-z
更新日期：2014-03-01 00:00:00
abstract：:Cytokeratins (CK) constitute a family of cytoskeletal intermediate filament proteins that are typically expressed in epithelial cells. An abnormal structure and function are effects that are clearly related to liver diseases as non-alcoholic steatohepatitis, cirrhosis and hepatocellular carcinoma. We have previously o...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-007-0192-7
更新日期：2007-09-01 00:00:00
abstract：:Alternative methods to detect non-genotoxic carcinogens are urgently needed, as this class of carcinogens goes undetected in the current testing strategy for carcinogenicity under REACH. A complicating factor is that non-genotoxic carcinogens act through several distinctive modes of action, which makes prediction of t...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-014-1368-6
更新日期：2015-12-01 00:00:00
abstract：:The aim of this study was to assess the neurotoxicity of diazinon oxon (DZO), a major in vivo metabolite of the phosphorothionate insecticide diazinon (DZ), on differentiating mouse N2a neuroblastoma cells. When used at concentrations of 1, 5 and 10 microM, DZO did not cause cell death but it impaired the outgrowth of...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-008-0339-1
更新日期：2009-04-01 00:00:00
abstract：:Acetaminophen (APAP) overdose is a leading cause of drug-induced acute liver failure. Prolonged c-Jun N-terminal kinase (JNK) activation plays a central role in APAP-induced liver injury; however, growth arrest and DNA damage-inducible 45 beta (GADD45β) is known to inhibit JNK phosphorylation. The orphan nuclear recep...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-018-2247-3
更新日期：2018-08-01 00:00:00
abstract：:To investigate the mechanism on photosensitive dermatitis caused by ketoprofen (KP) in humans, the following experiments were performed by topical application on guinea pigs. The phototoxicity study involving treatment with 10% solution of KP, its enantiomers (R-KP and S-KP), loxoprofen, and flurbiprofen revealed no p...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-006-0063-7
更新日期：2006-07-01 00:00:00
abstract：:To clarify whether oxidative stress is involved in the development of hepatocellular preneoplastic foci induced by fenofibrate (FF), a peroxisome proliferator-activated receptor alpha agonist, male F344/N rats were fed a diet containing 6,000, 3,000, or 0 ppm of FF for 13 weeks after N-diethylnitrosamine initiation. T...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-007-0278-2
更新日期：2008-09-01 00:00:00
abstract：:During/after the BP/Deepwater Horizon oil spill, cleanup workers, fisherpersons, SCUBA divers, and coastal residents were exposed to crude oil and dispersants. These people experienced acute physiological and behavioral symptoms and consulted a physician. They were diagnosed with petroleum hydrocarbon poisoning and ha...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-015-1526-5
更新日期：2016-04-01 00:00:00
abstract：:Breast cancer is the most commonly diagnosed malignancy in females, the etiology being multifactorial and includes the role of lifestyle exposure to DNA-damaging chemicals such as dietary carcinogens benzo (a) pyrene (BaP) and 2-amino-1-methyl-6-phenylimidazo [4, 5-b] pyridine (PhIP). Both compounds require cytochrome...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-019-02558-8
更新日期：2019-10-01 00:00:00
abstract：:Acetaminophen (APAP) overdose is the leading cause of acute liver failure. Yet the mechanisms underlying adaptive tolerance toward APAP-induced liver injury are not fully understood. To better understand molecular mechanisms contributing to adaptive tolerance to APAP is an underpinning foundation for APAP-related prec...
journal_title：Archives of toxicology
pub_type： 杂志文章
doi：10.1007/s00204-017-2090-y
更新日期：2018-02-01 00:00:00
