Abstract:
:Due to their exceptional properties, gold nanoparticles (AuNPs) have shown promising medical and technological applications in the treatment of cancer and the development of antimicrobial packaging and time-temperature indicators in the food sector. However, little is known about their cytotoxicity when they come into contact with biological systems. The aim of this work was to compare the effects of three commercially available AuNPs of different sizes (30, 50 and 90 nm) on human leukemia (HL-60) and hepatoma (HepG2) cell lines. AuNP-induced cytotoxicity was dose and time-dependent, with IC50 values higher than 15 μg/mL. Nanoparticle (NP) size and cell line slightly influenced on the cytotoxicity of AuNPs, although HL-60 cells proved to be more sensitive to the cytotoxic response than HepG2. N-Acetyl-L-cysteine (NAC) protected HL-60 and HepG2 cells only against treatment with 30 nm AuNPs. In both cell types, glutathione (GSH) content was drastically depleted after 72 h of incubation with the three AuNPs (less than 30% in all cases), while the reduction of superoxide dismutase activity (SOD) activity depended on cell line. HepG2, but not HL-60 cells, exhibited a decrease of SOD activity (∼ 45% of activity). The three AuNPs also caused a two-fold elevation of reactive oxygen species (ROS) production in both cell lines. Thus, protective effect of NAC, depletion of GSH and increase of ROS appear to be determined by NP size and indicate that oxidative stress contributes to cytotoxicity of AuNPs.
journal_name
Toxicol Mech Methodsjournal_title
Toxicology mechanisms and methodsauthors
Mateo D,Morales P,Ávalos A,Haza AIdoi
10.3109/15376516.2013.869783subject
Has Abstractpub_date
2014-03-01 00:00:00pages
161-72issue
3eissn
1537-6516issn
1537-6524journal_volume
24pub_type
杂志文章abstract:OBJECTIVE:The objective of this study was to describe the toxicity induced by curcumin in human astrocytoma cell lines. METHODS:The effects induced by curcumin, at 100 µM for 24 h, were evaluated in four astrocytoma cell lines using crystal violet assay and through the evaluation of morphological and ultrastructural c...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2013.826768
更新日期:2013-11-01 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::The current study evaluated in vitro and in vivo toxicity of carboxyl or amine polyethylene glycol (PEG) surface functionalization of single-walled carbon nanotubes (SWCNTs). Assessments of cytotoxicity, genotoxicity, immunotoxicity, and oxidative stress were performed in vitro and in vivo (in a 1-month follow-up stud...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2018.1540674
更新日期:2019-05-01 00:00:00
abstract::Misuse of various chemicals, such as chemical warfare agents, industrial chemicals or pesticides during warfare or terrorists attacks requires adequate protection. Thus, development and evaluation of novel decontamination dispositives and techniques are needed. In this study, in vitro permeation and decontamination of...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2012.686535
更新日期:2012-09-01 00:00:00
abstract::We investigated the prooxidant effects of bisphenol A (BPA) phenoxyl radicals in comparison with the phenoxyl radicals of 3-tert-butyl-4-hydroxyanisole (BHA), 2,6-di-tert-butyl-methylphenol (BHT) and 4-tert-butylphenol (TBP). The phenoxyl radicals, generated in situ by 1-electron oxidation of the corresponding phenol,...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2012.753969
更新日期:2013-05-01 00:00:00
abstract::The brain is a well-organized, yet highly complex, organ in the mammalian system. Most investigators use the whole brain, instead of a selected brain region(s), for biochemical analytes as toxicological endpoints. As a result, the obtained data is often of limited value, since their significance is compromised due to ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376520490429175
更新日期:2004-01-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Gentamicin (GM) is used against bacterial infections. The aim of our investigation was to evaluate the role of inflammation and also oxidative damage in nephrotoxic potential of GM and protective effects of Nasturtium officinale (watercress) against GM-induced nephrotoxicity in Wistar rats. MATE...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2016.1258748
更新日期:2017-02-01 00:00:00
abstract::Histone deacetylase 2 (HDAC2), a prominent member of the class I HDAC family, plays crucial roles in inflammation and other pathological processes. Recent studies have found that the activity and expression of HDAC2 were altered under oxidative stress conditions. The aim of the current study was to elucidate the expre...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2012.716091
更新日期:2012-10-01 00:00:00
abstract::In this study, the preventive effects of NGF against colistin-induced autophagy and apoptosis in PC12 cells have been investigated. Fluorescence microscopy, real-time PCR, transmission electron microscopy (TEM), flow cytometery, and western blotting technique were used. The results showed that large amounts of autopha...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2018.1534298
更新日期:2019-03-01 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::The B6C3F1 mouse is the standard mouse strain used in National Toxicology Program (NTP) carcinogenesis studies. Over time, increased liver tumorigenesis that was correlated with elevated body weights was noted in males and females. NTP therefore replaced the NIH-07 diet with the NTP-2000 diet and returned to group hou...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2012.672482
更新日期:2012-07-01 00:00:00
abstract::Methylthiophanate is one of the widely used fungicides to control important fungal diseases of crops. The aim of this study was to elucidate the short-term hematoxicity and genotoxicity effects of methylthiophanate administered by intraperitoneal way at three doses (300, 500 and 700 mg/kg of body weight) after 24, 48 ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2014.961217
更新日期:2014-12-01 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::Up to now, the ability of target cells to activate protein kinase C (PKC) and protein kinase D (PKD) (which is often a downstream target of PKC) has not been examined in natural killer (NK) lymphocytes. Here we examined whether exposure of human NK cells to lysis sensitive tumor cells activated PKC and PKD. The result...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2015.1070226
更新日期:2015-01-01 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::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::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::ABSTRACT The present investigation was undertaken to examine the effects of chlorpyrifos (CP, an organophosphate) and deltamethrin (DM, a pyrethroid pesticide) treatments at low and high doses and their combination on lipid peroxidation and antioxidant enzyme activities such as SOD, GSH-Px, and CAT and also AChE activ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510701380463
更新日期:2007-01-01 00:00:00
abstract::Ethanol metabolism is accompanied by generation of free radicals that damage cell components, especially lipids. The present study was designed to investigate the efficacy of the preventive effect of black tea on the lipid oxidative modifications in different tissues (plasma, liver, brain, kidney, stomach, lung, intes...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510701624050
更新日期:2008-07-01 00:00:00
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::Benzene (C6H6) is one of the most commonly used industrial chemicals causing environmental pollution. This study aimed to examine the effect of benzene and its metabolite hydroquinone on glucose regulating organs, liver and pancreas, and to reveal the involved toxic mechanisms, in rats. In the in vivo part, benzene wa...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2015.1053650
更新日期:2015-01-01 00:00:00
abstract::In the present investigation acetylcholinesterase (AChE) was estimated in erythrocytes from blood samples exposed to four commonly used organophosphorus pesticides in vitro. The aim of the study was to determine the IC50 concentration of the pesticides monocrotophos, chlorpyrifos, profenofos, and acephate as inhibitor...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376520600719281
更新日期:2006-01-01 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::The aim of this work was to characterize inner mitochondrial membrane channels permeable to calcium cations (Ca(++)). Mitochondrial membranes isolated from rat heart were incorporated into the bilayer lipid membrane, and single Ca(++) channel currents were measured. The observed channels were selective for Ca(++) and ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376520490257428
更新日期:2004-01-01 00:00:00
abstract:BACKGROUND:The anatomical and histological parameters of the human ventricle depend on many factors including age and sex. Myocyte volume and electric capacitance are significant physiological parameters of left ventricle cardiomyocyte mathematical models. They allow the assessment of inter-individual variability durin...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2011.585477
更新日期:2012-01-01 00:00:00
abstract::Renal disease is a common complication of diabetes mellitus. The pathogenesis of diabetic nephropathy is not well understood, but hyperglycemia seems to be a crucial factor. Recent evidence indicates that the overproduction of reactive oxygen species, observed in both clinical and experimental diabetes, and mitochondr...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376520590968806
更新日期:2005-01-01 00:00:00
abstract::We investigated the effect of two extracts from Peruvian plants given alone or in a mixture on sperm count and glycemia in streptozotocin-diabetic mice. Normal or diabetic mice were divided in groups receiving vehicle, black maca (Lepidium meyenii), yacon (Smallanthus sonchifolius) or three mixtures of extracts black ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2013.785656
更新日期:2013-09-01 00:00:00
abstract:CONTEXT:Over expression of renin-angiotensin system (RAS) and nuclear factor-kappaB (NF-κB) has a major role in many cancers. It has been suggested that some angiotensin receptor blockers (ARBs) could reduce the proliferation of cancer cells. The role of NF-κB pathway has been documented in cell proliferation. OBJECTI...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2015.1053647
更新日期:2015-01-01 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::Ornithine decarboxylase (ODC) activity is used widely as a biomarker for tumor promotion in animal model systems. Several previous studies have reported increases in ODC activity in tissues of rats exposed to 60 Hz magnetic fields. The goals of this study were to confirm these findings and to determine whether ODC act...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510309826
更新日期:2003-01-01 00:00:00