Abstract:
:Three trials involving 184 male Sprague Dawley rats were conducted to identify the biologically active fraction of endophyte-infected tall fescue seed. In trial 1, seed infected (greater than 95%) with the endophytic fungus Acremonium coenophialum and shown to be toxic to cattle, was serially extracted with hexane, ethylacetate, and methanol, respectively. A second sample of this seed was extracted with chloroform only. Controls included a solvent treatment (spraying the various solvents on endophyte-free seed and carrying the mixture to dryness), the seed post-extraction, endophyte-infected seed and endo-phyte-free seed. Laboratory chow was mixed with all diets to provide 50% of the mix. Trial 2 examined the same treatments as trial 1 except that the chloroform treatment was omitted. Dosages 3 times (equivalent to 22.5 g seed) those used in trial 1 were applied to endophyte-free seed (7.5 g) in an attempt to accentuate any differences. Trial 3 examined the methanol fraction extracted serially, a methanol fraction extracted batchwise, and a water fraction extracted batchwise. Controls included seed residues post-extraction, solvent residue from methanol sprayed on endophyte-free seed, and endophyte-infected seed. Lowered feed intake and weight gains, and depressed serum prolactin concentrations were used as indicators of toxicity. Feed intake was lower in all three trials for rats fed the methanol fraction. In all three trials mean serum prolactin concentrations in rats fed the methanol extracts were not different from those fed endophyte-infected fescue seed. Rats fed the water extract in trial 3 had lower feed intakes than rats fed endophyte-free seed. However, rats fed the seed, post-water extraction, had serum prolactin concentrations similar to that of the negative control. Results suggest that the toxic factor(s) may be concentrated in the methanol extract.
journal_name
Drug Chem Toxicoljournal_title
Drug and chemical toxicologyauthors
Jackson JA,Hemken RW,Bush LP,Boling JA,Siegel MR,Zavos PMdoi
10.3109/01480548709042993subject
Has Abstractpub_date
1987-01-01 00:00:00pages
369-79issue
3-4eissn
0148-0545issn
1525-6014journal_volume
10pub_type
杂志文章abstract::Cis-1,2-dichloroethylene was administered daily by corn oil gavage to male and female Sprague-Dawley rats at the following dose levels: 1.0, 3.0, 10.0 and 22.0 mmol/kg/day for 14 days. Doses gavaged during the 90-day subchronic study were 0.33, 1.00, 3.00 and 9.00 mmol/kg/day. There were no compound-related deaths or ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480549509014319
更新日期:1995-05-01 00:00:00
abstract::Oxidative stress is produced under diabetic conditions and is likely involved in the progression of pancreatic damage found in diabetes. This study was undertaken to evaluate the protective effect of Aegle marmelos leaf extract, a medicinal plant, on the tissue antioxidant defense system and lipid peroxidative status ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480540903203984
更新日期:2010-04-01 00:00:00
abstract::An anti-tumor agent, the cationic dye rhodamine 123 (Rh 123), becomes concentrated in mitochondria of certain tissues and inhibits ATP production. Rh 123 was tested for developmental toxicity by i.p. injection into pregnant CD-1 mice daily on gestation days 7-10 (plug = day 1) at doses up to 15 mg/kg/day. Additional m...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480548809017882
更新日期:1988-01-01 00:00:00
abstract::The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and the National Oil and Hazardous Substances Pollution Contingency Plan (NCP) mandate protection of public health, welfare, and the environment at Superfund hazardous waste sites. The NCP requires lead response agenciesto integrate bas...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480549709003889
更新日期:1997-11-01 00:00:00
abstract::Diterpene alkaloids (DAs) have a broad spectrum of pharmacological activities, but exhibiting extremely serious cardiotoxicity to induce arrhythmia, heart arrest, even death. This study aimed to evaluate the cardiotoxicity of three diester diterpene alkaloids (DDAs) including aconitine (AC), mesaconitine (MAC), hypaco...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2019.1586916
更新日期:2019-03-21 00:00:00
abstract::In adult female Wistar rats, pretreated by gavage with two doses - 16 or 256 mumol/kg - of cyanamide, TMTD (tetramethylthiuram disulfide), TMTM (tetramethylthiuram monosulfide), Ziram or Zineb at 90 min or 18 h before administration of 2 g of ethanol/kg i.p., the blood acetaldehyde levels were significantly increased ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480548309082713
更新日期:1983-01-01 00:00:00
abstract::The present study was aimed to report the toxicity of the chlorpyrifos, an organophosphorus insecticide, with regard to histological and cytological effects through light and transmission electron microscopes in the gills of freshwater fish, Anabas testudineus. The fish were exposed to 0.125 (5% of 96 h LC50), 0.250 (...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2018.1497052
更新日期:2020-07-01 00:00:00
abstract::The present study was aimed at exploring the effect of monensin, an antibiotic carboxylic polyether ionophore specific for Na(+), on the structural, chemical, and physiological changes of the epididymal sperm of Wistar rats. Animals received monensin at the dose of 3.5 mg/kg body weight daily orally for 70 days, a tre...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480545.2011.650174
更新日期:2013-01-01 00:00:00
abstract::Experimental and clinical data relevant for the evaluation of the carcinogenic potential of the immunosuppressant ciclosporin are reviewed. Ciclosporin binds reversibly to the cytosolic receptor protein ciclophilin. Ciclophilin is likely involved in the blockade of lymphocyte activation-induced gene transcription of v...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章,评审
doi:10.3109/01480549209032293
更新日期:1992-01-01 00:00:00
abstract::Adriamycin (ADR) causes morphological and functional alterations in mitochondrial structure in the heart. The study's aim was to determine whether there is a protective effect of selenium (Se) on ADR-induced cardiac damage. Rats were divided into four groups: The first group was injected saline intraperitoneally (i.p....
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480545.2010.538693
更新日期:2011-04-01 00:00:00
abstract::Rotenone, an environmental toxin, triggers Parkinson's disease (PD)-like pathology through microglia-mediated neuronal death. The effects and molecular mechanisms of flavonoid luteolin against rotenone-induced toxicity was assessed in microglial BV2 cells. Cells were pretreated with luteolin (1-50 µM) for 12 h and the...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2018.1504961
更新日期:2020-01-01 00:00:00
abstract::This Visual Basic computer program has been developed for drug dosage conversions using metabolically active mass (MAM) of the animals. The two body weights (one with known dosage and the other, for which the dosage has to be calculated) and the known dosage are entered in the respective input boxes and the appropriat...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1081/dct-120017557
更新日期:2003-02-01 00:00:00
abstract::The status of brain antioxidant enzymes and glutathione in methacrylonitrile (MeAN)-intoxicated Wistar rats was correlated with the levels of lipid peroxidation products. Optimum changes were observed 30 min and 60 min after oral administration of MeAN at dosages of 50 mg/kg body weight per day (0.25 LD50) and 100 mg/...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1081/dct-52536
更新日期:2005-01-01 00:00:00
abstract::The fluoride reactivation process was evaluated for measuring the level of sarin or soman nerve agents reactivated from substrates in plasma and tissue from in vivo exposed guinea pigs (Cava porcellus), in blood from in vivo exposed rhesus monkeys (Macaca mulatta), and in spiked human plasma and purified human albumin...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1081/dct-120027901
更新日期:2004-02-01 00:00:00
abstract::Orlistat is an FDA-approved over-the-counter drug to treat obesity through the inhibition of lipase activity. Macrophages, which express high levels of lipoprotein lipase (LPL), are important phagocytes in the innate immune system. Our previous studies indicated that environmentally relevant concentrations of arsenite...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2019.1683571
更新日期:2019-10-31 00:00:00
abstract:CONTEXT:Withania somnifera (L) Dunal (Solanaceae) is an important traditional herbal medicine used for thousands of years and is considered as the Indian ginseng. Reports on the effect of Withania somnifera root (WSR) extract on the developing foetus of pregnant rats including mortality, structural abnormalities, chang...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480545.2014.900073
更新日期:2015-01-01 00:00:00
abstract::Chrysin (CH) is a natural flavone which possesses antioxidant, anti-cancer, and anti-inflammatory properties. The aim of the present study was to investigate the effects of CH on biochemical parameters, histopathological changes, and genotoxicity and hematological indices in diazinon (DZN)-induced toxicity in BALB/c m...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2017.1384834
更新日期:2018-07-01 00:00:00
abstract::Organoselenium compounds can cause anemia in mice, possibly as a consequence of impairment of the heme biosynthesis pathway. Such compounds can inhibit the sulfhydryl-containing enzyme delta-aminolevulinate dehydratase (delta-ALA-D), which is involved in the heme biosynthetic pathway, leading to a decrease in the synt...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1081/dct-200039720
更新日期:2004-11-01 00:00:00
abstract::Many steps are required to convert a normal cell into a cancerous one. The cancer cell must be able to multiply under conditions that a normal cell would not and to invade surrounding tissue and spread throughout the body. Both genetic changes, such as activation of oncogenes or inactivation of tumor suppressor genes,...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章,评审
doi:10.3109/01480549608998231
更新日期:1996-08-01 00:00:00
abstract::Gold nanorods (GNRs) are used for their wide variety of applications in various industries. There is a little availability of data related to toxicity and ecological implications of these GNRs. The study evaluated the oxidative stress induction following intra-tracheal instillation of 1 and 5 mg/kg b.w. doses of 10 an...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2017.1321012
更新日期:2018-04-01 00:00:00
abstract::A series of new compounds were evaluated for acute in vivo toxicity. Their synthesis and antifungal activity have previously been described by us. The naturally occurring class of compounds to which they belong - the benzylidenechroman-4-ones - have been identified as a potential source of new antifungal agents. These...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480549009018120
更新日期:1990-01-01 00:00:00
abstract::While it is well recognized that the combination of amoxicillin and clavulanic acid has been associated with hepatic adverse events, there are only a few reports about amoxicillin alone causing hepatic toxicity. We describe a 34-year-old woman who developed severe cholestatic hepatitis following amoxicillin treatment....
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480545.2010.545067
更新日期:2011-10-01 00:00:00
abstract::Azaperone was evaluated for its mutagenic potential by the Salmonella/microsome test. No mutagenic activity towards six S. typhimurium strains could be evidenced with azaperone at doses up to 2,000 micrograms/plate, either without or with metabolic activation at usual test conditions. Higher concentrations of liver po...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480548709042990
更新日期:1987-01-01 00:00:00
abstract:CONTEXT:Celtis glabrata is used in Turkey for the treatment of various health disorders. OBJECTIVE:The acetone, chloroform, ethanol, and methanol extracts of C. glabrata leaf, fruit, and seed were investigated to evaluate their antimutagenic activities. MATERIAL AND METHODS:The antimutagenicity of these extracts was ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480545.2015.1121273
更新日期:2016-01-01 00:00:00
abstract::Given the increasing prevalence of occupational sensitization to acrylate compounds, n-butyl acrylate (BAC), ethyl acrylate (EAC), and trimethylol propane triacrylate (TMT) were recommended by the National Toxicology Program for hypersensitivity testing in female B6C3F1 mice. The objectives of these studies were to de...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480549909042528
更新日期:1999-08-01 00:00:00
abstract::As part of an occupational hazard evaluation, p-bromobenzyl bromide (p-BBB) was evaluated for genotoxic activity in the Ames microbial mutagenicity assay, the alkaline elution assay for DNA strand breaks in rat hepatocytes and the in vitro chromosome aberration assay in Chinese hamster ovary cells. The compound produc...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480549908993169
更新日期:1999-11-01 00:00:00
abstract::Copper (Cu) is a heavy metal with the ability to induce, at high levels, neurobehavioral alterations, and oxidative stress (OS). On the other hand, melatonin (Mel) is a neurohormone that protects neurons from OS and has a modulatory effect on several behavioral processes. The present experiment was aimed to examine th...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2020.1858853
更新日期:2021-01-07 00:00:00
abstract::Many pharmaceuticals are administered to children and adults as sprays provided in nebulizers or metered-dose inhalers. Stress associated with possible eye irritation and injury attributable to exposure to vapors and particulates during the required safety testing procedures of such medicines is a potential confoundin...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480549809002204
更新日期:1998-08-01 00:00:00
abstract::This study investigated the effect of Thyme (Thymus vulgaris) leaf aqueous extract (TE) on purine and acetylcholine hydrolyzing enzyme activities and antioxidant status in the brain of 5-fluorouracil (5-FLU) administered rats. Sixty adult Wistar rats (210-225 g) were divided into Ten groups (n = 6). Group 1: received ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2019.1659310
更新日期:2020-01-01 00:00:00
abstract::The availability of tissue glutathione (GSH) appears to depend upon a balance between tissue concentrations, the rate of reactive metabolite formation and the re-synthesis of GSH. To test this hypothesis, diethyl maleate (DEM, 5.8 mmol/kg bw) was administered intraperitoneally to male and female mice, hamsters, rats a...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480548408998263
更新日期:1984-01-01 00:00:00