Abstract:
:In cosmetics and food products, parabens are widely used as antimicrobial agents. Reports have suggested that parabens may be linked to infertility, owing to their effects on basal steroidogenesis properties or their capacity to inflict mitochondrial damage. Despite growing concerns about parabens as endocrine disruptors, it is unclear whether they affect any of these actions in humans, particularly at environmentally relevant concentrations. In this work, an in vitro primary culture of human granulosa cells was used to evaluate steroidogenesis, based on the assessment of progesterone production and regulation of critical steroidogenic genes: CYP11A1, HSD3B1, CYP19A1, and HSD17B1. The effects of two commercially relevant parabens, methylparaben (MPB) and butylparaben (BPB), were screened. Cells were exposed to multiple concentrations ranging from relatively low (typical environmental exposure) to relatively high. The effect was assessed by the parabens' ability to modify steroidogenic genes, progesterone or estradiol production, and on mitochondrial health, by evaluating mitochondrial activity as well as mtDNA content. Neither MPB nor BPB showed any effect over progesterone production or the expression of genes controlling steroid production. Only BPB affected the mitochondria, decreasing mtDNA content at supraphysiological concentrations (1000 nM). Prolonged exposure to these compounds produced no effects in neither of these parameters. In conclusion, neither MPB nor BPB significantly affected basal steroidogenesis in granulosa cells. Although evidence supporting paraben toxicity is prevalent, here we put forth evidence that suggests that parabens do not affect basal steroidogenesis in human granulosa cells.
journal_name
Toxicol Mech Methodsjournal_title
Toxicology mechanisms and methodsauthors
Herrera-Cogco E,López-Bayghen B,Hernández-Melchor D,López-Luna A,Palafox-Gómez C,Ramírez-Martínez L,López-Bello E,Albores A,López-Bayghen Edoi
10.1080/15376516.2020.1741052subject
Has Abstractpub_date
2020-06-01 00:00:00pages
336-349issue
5eissn
1537-6516issn
1537-6524journal_volume
30pub_type
杂志文章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...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2013.869783
更新日期:2014-03-01 00:00:00
abstract::The objective of this study was to examine the toxicity of 1-(4-morpholinophenyl)-3-(4-fluorophenyl)-propenone (A) and 1-(4-morpholinophenyl)-3-(3-fluorophenyl)-propenone (B) on Spodoptera frugiperda (Sf9) cells and the mechanism of the toxicity. By cell-based thiazolyl blue tetrazolium bromide (MTT) assay, we found t...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2012.658979
更新日期:2012-05-01 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::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 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::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:BACKGROUND:Arsenic has been shown to cause various diseases (such as blackfoot disease, cardiovascular diseases, bladder cancer and skin cancer) in many areas of the world. However, the effects of arsenic on cardiac rhythm functions still lack investigation. METHODS:In this study, different concentrations of arsenic w...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2018.1440679
更新日期:2018-07-01 00:00:00
abstract::Preeclampsia is a multisystem disorder with profound implications on both mother and fetus. Analysis of umbilical cord blood red blood cell (RBC) changes shall depict the fetal response to pregnancy-specific complications like preeclampsia. This study aims to analyze the regulation relationship between HSP90α and heme...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2012.725432
更新日期:2013-02-01 00:00:00
abstract::The aim of this study was to evaluate the effects of different doses of an adenosine A(1) selective agonist, phenylisopropyl adenosine (PIA), on metamidophos-induced cholinergic symptoms, mortality, diaphragm muscle necrosis, and brain oxidative stress. A LD(50) dose of metamidophos (20 mg/kg body weight, p.o.) was fo...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510802355141
更新日期:2009-02-01 00:00:00
abstract::The US military has placed major emphasis on developing therapeutics against nerve agents (NA). Current efforts are hindered by the lack of effective in vitro cellular models to aid in the preliminary screening of potential candidate drugs/antidotes. The development of an in vitro cellular model to aid in discovering ...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2014.943442
更新日期:2014-10-01 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::Owing to their structure and function, low-density lipoproteins (LDLs) are particularly susceptible to the oxidative modifications. To prevent against oxidative modification of LDL, L-carnitine, with endogenous small water-soluble quaternary amine possessing antioxidative properties, was used. The aim of this paper wa...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510701623508
更新日期:2008-07-01 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 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::Angiogenesis, disturbance in redox homeostasis, and deregulated redox signaling are considered as common hallmarks of cancer progression and chemo resistance. In this context, PERK (protein kinase PKR-like ER kinase) branch of the unfolded protein response (UPR), an adaptive mechanism triggered by endoplasmic reticulu...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2020.1727596
更新日期:2020-05-01 00:00:00
abstract::This article described an improved brine shrimp larvae lethality microwell test method. A simply designed connecting vessel with alternative photoperiod was used to culture and collect high yield of active Artemia parthenogenetica nauplii for brine shrimp larvae lethality microwell test. Using this method, pure A. par...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2011.583297
更新日期:2012-01-01 00:00:00
abstract::The implications of delta-aminolevulinic acid dehydratase (ALAD) polymorphism for lead kinetics and toxicity have been mainly studied in occupationally exposed adults. Therefore, our purpose was to evaluate the distribution of ALAD genotype and its association with biomarkers of exposure (PbB levels) and effect (Blood...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376520500191946
更新日期:2006-01-01 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::ABSTRACT The ideal toxicity biomarker is composed of the properties of prediction (is detected prior to traditional pathological signs of injury), accuracy (high sensitivity and specificity), and mechanistic relationships to the endpoint measured (biological relevance). Gene expression-based toxicity biomarkers ("sign...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510701857072
更新日期:2008-01-01 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::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::The titanium nitride coated titanium is a material intended for the fabrication of left ventricular assist device. As per International standards, a material is subjected to pre-clinical evaluation before fabrication of a device. Toxicity/biocompatibility studies such as acute systemic toxicity, intracutaneous irritat...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2011.610384
更新日期:2012-02-01 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::Monte Carlo based method by using either SMILES based or combination of SMILES and Graph-based descriptors is an important strategy to build the QSAR/QSTR model for prediction of different biological endpoints. In this study, Monte Carlo based QSTR approach was applied to the dataset of 90 nitroaromatic compounds rela...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2019.1709238
更新日期:2020-05-01 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::Human exposure to copper oxide (CuO) nanoparticles (NPs) is rapidly increasing and for this reason reliable toxicity test systems are urgently needed. Recently, the acute cytotoxicity of CuO NPs using the new toxicity test based on human bone marrow mesenchymal stem cells (hBMMSCs) has been evaluated. It was shown tha...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376516.2016.1220654
更新日期:2016-10-01 00:00:00
abstract::ABSTRACT Body packers are people who illegally carry drugs, mostly cocaine as well as opium and/or heroin, concealed within their bodies. The packets are inserted in the mouth, rectum, or vagina in order to get across borders without being detected. In this presentation we report a case of an opium body packer and rev...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.1080/15376510600992574
更新日期:2007-01-01 00:00:00
abstract::Concern over the influence of carbon nanotubes (CNTs) on human health has arisen due to advances; however, little is known about the potential toxicity of CNTs. In this study, impurity-free single-wall carbon nanotubes (SWCNTs), with different physical properties in cell culture medium, were prepared by a novel disper...
journal_title:Toxicology mechanisms and methods
pub_type: 杂志文章
doi:10.3109/15376516.2013.811568
更新日期:2013-10-01 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::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