Abstract:
:Timolol is a medication used widely to treat glaucoma. Regarding Ca2+ signaling, timolol was shown to modulate Ca2+-related physiology in various cell types, however, the effect of timolol on Ca2+ homeostasis and cell viability has not been explored in human prostate cancer cells. The aim of this study was to explore the effect of timolol on intracellular Ca2+ concentrations ([Ca2+]i) and viability in PC3 human prostate cancer cells. Timolol at concentrations of 100-1000 μM induced [Ca2+]i rises. The Ca2+ signal in Ca2+-containing medium was reduced by removal of extracellular Ca2+ by approximately 75%. Timolol (1000 μM) induced Mn2+ influx suggesting of Ca2+ entry. Timolol-induced Ca2+ entry was partially inhibited by three inhibitors of store-operated Ca2+ channels: nifedipine, econoazole and SKF96365, and by a protein kinase C (PKC) activator (phorbol 12-myristate 13 acetate [PMA]) or an inhibitor (GF109203X). In Ca2+-free medium, treatment with the endoplasmic reticulum Ca2+ pump inhibitor thapsigargin abolished timolol-evoked [Ca2+]i rises. Conversely, treatment with timolol abolished thapsigargin-evoked [Ca2+]i rises. Inhibition of phospholipase C (PLC) with U73122 abolished timolol-induced [Ca2+]i rises. Timolol at concentrations between 200 and 600 μM killed cells in a concentration-dependent fashion. Chelation of cytosolic Ca2+ with 1,2-bis(2-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid/AM (BAPTA/AM) did not reverse cytotoxicity of timolol. Together, in PC3 cells, timolol induced [Ca2+]i rises by evoking Ca2+release from the endoplasmic reticulum in a PLC-dependent manner, and Ca2+ influx via PKC-regulated store-operated Ca2+ entry. Timolol also caused cell death that was not linked to preceding [Ca2+]i rises.
journal_name
Toxicol Mech Methodsjournal_title
Toxicology mechanisms and methodsauthors
Wang JL,Chou CT,Liang WZ,Wu CJ,Kuo CC,Hao LJ,Shieh P,Jan CRdoi
10.1080/15376516.2018.1540024subject
Has Abstractpub_date
2019-02-01 00:00:00pages
138-145issue
2eissn
1537-6516issn
1537-6524journal_volume
29pub_type
杂志文章abstract:BACKGROUND:Oxytocin (OT) injections have been indiscriminately used to milk cattle in dairy industries. There is no study available regarding surveillance of OT in market milk samples. MATERIAL AND METHODS:OT from milk samples was extracted by precipitation with trichloroacetic acid and passed through the solid phase ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2014.910851
更新日期:2014-06-01 00:00:00
abstract::Impurities in drug substances and drug products generally do not have beneficial effects and may impose a risk without associated benefit. Levofloxacin n-oxide is an impurity isolated from levofloxacin. However there is insufficient toxic information about levofloxacin n-oxide. This study investigates the genotoxicity...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2011.635319
更新日期:2012-04-01 00:00:00
abstract::Miniscrew implants are widely used nowadays in orthodontic treatments due to their good results in clinical practice. However, data regarding the biocompatibility of commercially available orthodontic miniscrews and temporary devices are very scarce, and their role as genotoxicity inducers has been not previously eval...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2015.1053652
更新日期:2015-01-01 00:00:00
abstract::Prochloraz is a broad-spectrum contact imidazol fungicide used against several diseases in wheat, barley and oleaginous plants but also for treatment of flower production. Although prochloraz has endocrine disrupting and hepatocarcinogenic effects, there is lack of data on toxic effects of prochloraz. Therefore, we ai...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2014.881943
更新日期:2014-05-01 00:00:00
abstract:BACKGROUND AND OBJECTIVES:The aim of this study was to evaluate genotoxicity and mutagenicity in peripheral blood and buccal mucosal cells in mucopolysaccharidosis (MPS) I, II or VI patients. METHODS:A total of 12 patients with MPS type I, II and VI attended at the Institute of Genetics and Inborn Errors of Metabolism...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2014.956913
更新日期:2014-12-01 00:00:00
abstract::Multi-walled carbon nanotubes (MWCNTs) have industrial applications in the nanotechnology field. The physico-chemical properties of MWCNTs vary greatly depending on MWCNT manufacture and application. It has been pointed out that their needle shape and high durability are important factors that determine the biopersist...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2020.1761920
更新日期:2020-09-01 00:00:00
abstract::The influence of experimental conditions on gradient high-performance liquid chromatography/diode array detector separation and identification of 13 psychotropic drugs belonging to two groups--phenothiazines and tricyclic antidepressants--was examined. The main interaction effects of three experimental factors were de...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510309842
更新日期:2003-01-01 00:00:00
abstract::During an avian mass mortality event investigation at the National Fish and Wildlife Forensic Laboratory in Ashland, OR, imidacloprid became an insecticide of concern. A qualitative analytical toxicology screen of seeds, plucks (tongue, esophagus, and trachea), and ventricular contents was requested. A method for the ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2019.1616344
更新日期:2019-09-01 00:00:00
abstract::A potency of newly-developed oximes (K156, K203) and commonly used oximes (obidoxime, HI-6) to reactivate cyclosarin-inhibited acetylcholinesterase and to reduce cyclosarin-induced acute toxic effects was evaluated in this study. In vivo determined percentage of reactivation of cyclosarin-inhibited blood and tissue ac...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510903019307
更新日期:2009-06-01 00:00:00
abstract::Silver and gold nanoparticles (Ag-AuNPs) are currently some of the most manufactured nanomaterials. Accordingly, the hazards associated with human exposure to Ag-AuNPs should be investigated to facilitate the risk assessment process. In particular, because pulmonary exposure to Ag-AuNPs occurs during handling of these...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2015.1025347
更新日期:2015-01-01 00:00:00
abstract::Tumor progression is the continual selection of variant subpopulations of malignant cells that have acquired increasing levels of genetic instability (Nowell Science 1976, 194, 23-28). This instability is manifested as chromosomal aneuploidy or translocations, viral integration or somatic mutations that typically affe...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章,评审
doi:10.3109/15376516.2011.562759
更新日期:2011-05-01 00:00:00
abstract::ABSTRACT The effect of sodium selenite, alpha-tocopherol, and their combination was studied in the hemic system of goat. Incubation of goat blood with selenium and vitamin E for 24 h resulted in a decrease in hemoglobin concentrations in Se-and vitamin E-treated groups, whereas no change in the osmotic fragility was o...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510600860375
更新日期:2007-01-01 00:00:00
abstract::ABSTRACT When two toxicants overtly producing similar effects are given together, the effect of the combination may either be equal to the algebraic sum of their individual effects or may be more than or less than the algebraic sum of their individual effects. Therefore, to ascertain the nature of interaction precisel...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510601177654
更新日期:2007-01-01 00:00:00
abstract::4-Methylimidazole (4-MeI) is a nitrogen-containing heterocyclic compound that is used in the manufacture of chemicals, dyes and pharmaceuticals and may be found in a variety of foods following formation during heating. The purpose of this study was to use two different in silico programs, CASE Ultra and Toxtree, to in...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2019.1709237
更新日期:2020-05-01 00:00:00
abstract:CONTEXT:The critical role of CaMKIIδ isoforms in cardiac hypertrophy is well documented. OBJECTIVE:This study was aimed to investigate the possible inhibitory effects of aliskiren (ALS) and/or carvedilol (CAV) on CaMKIIδ isoforms expression in experimental cardiac hypertrophy. MATERIALS AND METHODS:Male Wistar albino...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2015.1128035
更新日期:2016-02-01 00:00:00
abstract::Mitochondrial haplogroups can differ in frequency of occurrence in those who are 100 years old and in the rest of the population. These differences are not universally observed; moreover, they are population-specific. We analyzed the haplogroups in 97 Polish 100-year-olds and compared them with those of more than 145 ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376520490257572
更新日期:2004-01-01 00:00:00
abstract::ABSTRACT This paper presents the results from an evaluation of the noncommercial, (quantitative) structure-activity relationship ([Q]SAR) models for the prediction of mutagenicity and carcinogenicity, carried out in a collaboration between the European Chemicals Bureau Group on Computational Toxicology and the Italian...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510701857056
更新日期:2008-01-01 00:00:00
abstract::Some environmental pollutants derived from industrial processes have been suggested to be responsible for neurological impairment in children, especially in heavily polluted areas. Since these compounds are usually activators of aryl hydrocarbon receptor (AhR), it would be important to better understand the molecular ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2015.1070227
更新日期:2015-01-01 00:00:00
abstract::ABSTRACT Oxidative damage to cellular constituents is one of the major mechanisms of alcoholic liver injury, and administration of antioxidants ameliorates alcoholic liver disease. The present study investigated the influence of (-) epigallocatechin gallate (EGCG), a major polyphenol component of green tea, on oxidant...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510701884985
更新日期:2008-01-01 00:00:00
abstract::Valproic acid (VPA), an anticonvulsant and mood-stabilizing drug, is widely used for the treatment of different types of seizures and myoclonic epilepsy. Several mechanisms have been suggested for VPA hepatotoxicity, and most of them are associated with oxidative stress. It seems that oxidative stress by VPA treatment...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2013.821567
更新日期:2013-10-01 00:00:00
abstract::Oxidative stress has a causative role in ischemic reperfusion-induced cell death. Evidence has shown that metformin is capable to reduce ischemic reperfusion injuries. The current study investigated the effect of metformin on ischemia/reperfusion-induced apoptosis in PC12 cells by evaluation of Bcl-2 family proteins e...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2018.1486495
更新日期:2018-10-01 00:00:00
abstract::Chronic hyperglycemia leads to the development of microvascular complications like diabetic nephropathy. The present study investigated the potential effects of the hydroalcoholic extract of Tribulus terrestris, a plant of Zygophyllaceae family, on the renal complications in streptozotocin (STZ)-induced diabetic rats....
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2013.797533
更新日期:2013-09-01 00:00:00
abstract:UNLABELLED:Cisplatin (CP) is an antineoplastic agent that induces nephrotoxicity and oxidative stress. It is unknown whether renal tight junction (TJ) proteins expression and localization are modified in CP-induced nephrotoxicity. OBJECTIVE:To study if the expression of the TJ proteins occludin, claudin-2, claudin-5 a...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2014.948248
更新日期:2014-10-01 00:00:00
abstract::Crotonaldehyde is a hazardous pollutant present in cigarette smoke and automobile exhausts that is generated by lipid peroxidation, and harmful to reproductive organs. Although we are often exposed to low doses of crotonaldehyde daily, its adverse effects on the reproductive organs have not been fully elucidated. To e...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2019.1646369
更新日期:2020-01-01 00:00:00
abstract::Xysmalobium undulatum (Uzara) is one of the most widely used indigenous traditional herbal remedies in Southern Africa. Commercially available Uzara plant material was used to prepare a crude aqueous extract, of which the toxicity potential was investigated in the hepatic HepG2/C3A cell line in both traditional two-di...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2018.1485805
更新日期:2018-11-01 00:00:00
abstract::The authors have previously shown that high alcohol preference rats (HAP) have a significantly higher sensitivity than low alcohol preference rats (LAP) for methamphetamine (MAP). In this study, changes in dopamine and serotonin release induced by MAP (1 mg/kg, intraperitoneally) after pre-treatment with D1 and D2 rec...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376511003621658
更新日期:2010-03-01 00:00:00
abstract::This report explores the direct counting of "hair-like" struc-tures specific for Gram-positive bacteria. Indications show that these structures are intact after removal from the cell and are sufficiently different from species to species of bacteria to give an indication of bacteria type if not actual identification. ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510600910477
更新日期:2006-01-01 00:00:00
abstract::Plethysmograph measurement of respiratory phenotypes provides a highly sensitive means to study nicotine response in experimental model animals. We measured average respiratory frequency, tidal volume, minute volume and inspiratory time in C3H/HeJ and C57BL/6J mice subcutaneously administered 0.35 and 0.70 mg/kg nicot...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2019.1628141
更新日期:2019-09-01 00:00:00
abstract::The present study was designed to determine whether the treatment with an ethanolic extract of pomegranate (EEP) (Punica granatum) can be useful for the treatment of the deleterious effect of lead acetate (LA) administration on sperm production in rats. The effects of EEP were compared with those of ascorbic acid (AA)...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2011.555789
更新日期:2011-07-01 00:00:00
abstract::In pregnancy, opioids may be used medically and also misused. We hypothesized that the umbilical cord (UC) could be a good screening tool for determining opioid exposure and improving medical care. One hundred and one UC, each with 50 associated ICD9/ICD10 codes were used. Using predictive pharmacokinetic analysis we ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2018.1506850
更新日期:2019-01-01 00:00:00