Abstract:
:Pentavalent antimonial (Sb5+) drugs such as meglumine antimoniate (MA) are the mainstay treatment of leishmaniases in developing countries. The effects of these compounds on drug-metabolizing enzymes have not been characterized and their potential pharmacokinetic interactions with other drugs are therefore unknown. The present study investigated whether treatment with MA (300 mg Sb5+/kg body weight/day, subcutaneously) for 24 days affected the activities of cytochrome P450 (CYP)1A (ethoxyresorufin- O-deethylase), CYP2A5 (coumarin 7-hydroxylase), CYP2E1 ( p-nitrophenol-hydroxylase), CYP2B9/10 (benzyloxy-resorufin- O-debenzylase), or CYP3A11 (erythromycin- N-demethylase) in the livers of Swiss Webster (SW) and DBA-2 male and female mice. The results showed that CYP2A5-, CYP2E1-, and CYP3A11-catalyzed reactions were unaffected by MA treatment. A decrease in CYP2B9/10 activity was noted in DBA-2 females (but not males) and was not observed in SW males or females. However, repeated MA administration reduced mouse liver CYP1A activity. CYP1A2 messenger RNA (mRNA) levels were not affected by MA and in vitro exposure of mouse liver microsomes to Sb3+ and Sb5+ did not reduce CYP1A activity. These findings suggested that in vivo treatment with Sb5+ drugs depressed CYP1A activity, without downregulating CYP1A2 mRNA expression. Since in vitro treatment of liver microsomes failed to inhibit CYP1A activity, this effect may require intact cells.
journal_name
Hum Exp Toxicoljournal_title
Human & experimental toxicologyauthors
Coelho DR,De-Oliveira A,Parente T,Leal BS,das Chagas LF,Oliveira TN,Saint'Pierre TD,Paumgartten Fdoi
10.1177/0960327116637110subject
Has Abstractpub_date
2017-01-01 00:00:00pages
33-41issue
1eissn
0960-3271issn
1477-0903pii
0960327116637110journal_volume
36pub_type
杂志文章abstract::Occupational chronic solvent encephalopathy (CSE) is associated with a number of neurobehavioural disorders including defects of visual perception. The purpose of this study was to characterize colour vision defects in CSE patients. Colour vision was tested in bright illumination with the Farnsworth-Munsell 100-hue te...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/0960327107076820
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abstract::This paper presents the findings of a study of serum pseudocholinesterase activity in a group of 36 industrial workers chronically exposed to organophosphorus (OP) compounds. The mean pseudocholinesterase level of the workers was significantly lower than that of 36 other workers without a history of similar exposure. ...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/096032719101000406
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abstract::The conventional method for the assessment of acute inhalation toxicity (OECD Test Guideline 403, 1981) uses death of animals as an endpoint to identify the median lethal concentration (LC50). A new OECD Testing Guideline called the Fixed Concentration Procedure (FCP) is being prepared to provide an alternative to Tes...
journal_title:Human & experimental toxicology
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abstract::In acute respiratory distress syndrome (ARDS), there is extensive overproduction of free radicals to the extent that endogenous anti-oxidants are overwhelmed, permitting oxidative cell damage. The present study examined the benefit of the anti-oxidant compound N-acetylcysteine (NAC) in the management of ARDS by measur...
journal_title:Human & experimental toxicology
pub_type: 杂志文章,随机对照试验
doi:10.1177/0960327107083452
更新日期:2007-09-01 00:00:00
abstract::In vivo antidotal efficacy of new bis- quaternary 2-(hydroxyimino)- N-(pyridin-3yl) acetamide derivatives (HNK series), to counter multiples of lethal doses of nerve agent sarin (GB) and reactivation of acetylcholinesterase (AChE), was evaluated in Swiss albino mice. [Protection index PI; median lethal dose (LD50) of ...
journal_title:Human & experimental toxicology
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doi:10.1177/0960327116637109
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abstract::Comparisons on a linear and the Rozman logarithmic scale for dosage versus carcinogenicity in rodents are presented for methyl eugenol (ME), nitrosodiethylamine (NDEA), ethyl carbamate (EC) and 2-acetylaminofluorene (AAF). Each of these chemicals has been shown to be carcinogenic in experimental animals and, in additi...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1191/0960327105ht525oa
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abstract::Arsenic is a naturally occurring environmental toxicant, chronic exposure to arsenic can cause multiorgan damage, except for typical skin lesions, liver damage is the main problem for health concern in population with arsenic poisoning. Abnormal apoptosis is closely related to liver-related diseases, and p53 is one of...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/0960327120988880
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abstract::From 1988 to 1991, 732 patients (91.1% Chinese) were admitted to four general medical wards at the Prince of Wales Hospital in Hong Kong with acute poisoning. The patients were predominantly female (68.9%) and relatively young (86.3% below the age of 40). Further analysis of 655 patients indicates that the vast majori...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/096032719401300711
更新日期:1994-07-01 00:00:00
abstract::Persistent organochlorine pollutants (POPs), such as polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), dichloro diphenyl trichloroethane (DDT) and its major metabolite 1,1-dichloro-2,2-bis (p-chlorophenyl)-ethylene (p,p' -DDE) have been associated with type 2 diabetes mellitus (T2DM) in rece...
journal_title:Human & experimental toxicology
pub_type: 杂志文章,多中心研究
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abstract::Paraquat poisoning was studied in 174 patients over a 12-month period when a new, low concentration paraquat product (4.5% w/v paraquat ion mixed with 4.5% w/v diquat ion; 63 cases) replaced the original high concentration paraquat product (20% w/v paraquat ion only; 111 cases). In both groups approximately 60% of the...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/096032719201100401
更新日期:1992-07-01 00:00:00
abstract::Drugs containing 5-acetylsalicylic acid (5-ASA) have been commonly used for inflammatory bowel diseases for more than half a century, but no case about overdose of suppository form of mesalazine which was taken both orally and rectally has been reported in the related literature up to now. In the present case, a 20-ye...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/0960327110379249
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abstract::Genotoxicants can be identified as aneugens and clastogens through a micronucleus (MN) assay. The current high-content screening-based MN assays usually discriminate an aneugen from a clastogen based on only one parameter, such as the MN size, intensity, or morphology, which yields low accuracies (70-84%) because each...
journal_title:Human & experimental toxicology
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doi:10.1177/0960327117695635
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abstract::Cytochrome P450 4B1 (CYP4B1) plays crucial roles in biotransforming of xenobiotics. Its predominant extrahepatic expression has been associated with certain tissue-specific toxicities. However, the expressions of CYP4B1 in various cancers and hence their potential roles in cancer development were inclusive. In this wo...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/0960327120905959
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journal_title:Human & experimental toxicology
pub_type: 杂志文章,多中心研究
doi:10.1177/0960327108100003
更新日期:2008-09-01 00:00:00
abstract::The effects of low lead exposure were investigated in 96 children (7-12 years old) living and studying within a 1 km radius of a lead smelter (exposed population) located in Torreón, Coahuila, México, and compared with 30 children living and studying 4.5 km from the same smelter (control population). Both populations ...
journal_title:Human & experimental toxicology
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更新日期:1996-04-01 00:00:00
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journal_title:Human & experimental toxicology
pub_type: 杂志文章
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journal_title:Human & experimental toxicology
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doi:10.1177/096032719201100303
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journal_title:Human & experimental toxicology
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doi:10.1177/0960327110383626
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abstract:INTRODUCTION:Accidental toxicity by organophosphate (OP) agents may occur among farmers during spraying season due to improper use and handling. Plasma cholinesterase (ChE) activity measurement is recommended to monitor the extent of exposure to the OP agent. The aim of the current study was to measure plasma ChE activ...
journal_title:Human & experimental toxicology
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journal_title:Human & experimental toxicology
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journal_title:Human & experimental toxicology
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doi:10.1177/0960327108088978
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abstract::1. The reactivating and therapeutic efficacy of a new acetylcholinesterase reactivator, designated BI-6 (1-/2-hydroxyiminomethylpyridinium/-4-/carbamoylpyridinium/- 2-butene dibromide), against organophosphate sarin was compared with presently used oximes (pralidoxime, obidoxime, methoxime) and H oximes (HI-6, HLö-7) ...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1191/096032799678845106
更新日期:1999-09-01 00:00:00
abstract::Three patients admitted to the Accident and Emergency Unit of Lagos University Teaching Hospital (LUTH) after eating a cassava based meal 'Gari' died shortly after admission. The patients vomited and complained of abdominal pain immediately after the meal. They were unconscious with renal failure and died of cardiopul...
journal_title:Human & experimental toxicology
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doi:10.1177/096032719201100107
更新日期:1992-01-01 00:00:00
abstract::Sterigmatocystin (Stg), a major secondary metabolite of Aspergillus versicolor and A. nidulans, is the precursor of aflatoxin B1. In this study, male albino rats were treated with Stg-contaminated diet for 30 days, resulting in reduced levels of glutathione, ascorbic acid, and alpha-tocopherol. The activity of catalas...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
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更新日期:2001-08-01 00:00:00
abstract::beta-glucuronidase is considered a sensitive biomarker for acute organophosphorus poisoning. In this well-documented study, multiple plasma samples over time were collected. A decrease in plasma concentration of beta-glucuronidase was surprisingly observed, even within normal range. These findings do not support the h...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/0960327108094614
更新日期:2008-05-01 00:00:00
abstract::Epichlorohydrin (ECH) is an antifertility agent that acts both as an epididymal toxicant and an agent capable of directly affecting sperm motility. This study identified the time course of apoptotic cell death in rat epididymides after ECH treatment. Rats were administrated with a single oral dose of ECH (50 mg/kg). E...
journal_title:Human & experimental toxicology
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doi:10.1177/0960327112467042
更新日期:2013-06-01 00:00:00
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journal_title:Human & experimental toxicology
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更新日期:2020-12-14 00:00:00
abstract::1. A modified mouse liver slice culture technique was established and the viability of the system was assessed on the basis of leakage of cytosolic enzymes viz. lactate dehydrogenase (LDH), alkaline phosphatase (ALP), alanine aminotransferase (ALT), aspartic aminotransferase (AST) and slice histology. 2. This system w...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
doi:10.1177/096032719601500202
更新日期:1996-02-01 00:00:00
abstract::1. Dettol liquid (chloroxylenol 4.8%, pine oil, isopropyl alcohol), a household disinfectant, has a corrosive action on the gastrointestinal mucosa when swallowed. The incidence of upper gastrointestinal haemorrhage and gastroscopic findings following Dettol poisoning was studied in 89 patients. 2. Five patients (5.6%...
journal_title:Human & experimental toxicology
pub_type: 杂志文章
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更新日期:1995-01-01 00:00:00
abstract::The color of the teeth is an important topic for many people and can be influenced by intrinsic and extrinsic stains. There is an increasing demand for whitening of the teeth year by year. The most popular way of whitening is "bleaching," which is the result of the breakdown of pigments located in the enamel and/or th...
journal_title:Human & experimental toxicology
pub_type: 临床试验,杂志文章
doi:10.1177/0960327118817103
更新日期:2019-04-01 00:00:00