Vasorelaxant effects of mercury on rat thoracic aorta: the nitric oxide signaling mechanism.

Abstract:

:Mercury, a heavy metal, is widespread and persistent in the environment and has been elucidated as a possible risk factor in cardiovascular diseases. Mercury has been reported to selectively impair the nitric oxide (NO) pathway in the vascular endothelium as a consequence of oxidative stress. Conversely, mercury per se causes endothelium-dependent vasorelaxation at lower concentration via the NO pathway. Little is known about the effects of mercury per se on other endothelial mediators. To elucidate possible mechanisms involved in this action, isometric tension was measured in aortic rings precontracted with phenylephrine (10 µM) from Wistar rats. Responses to increasing concentrations of inorganic mercuric chloride (10(-12)-10(-5) M) were obtained in the presence and absence of endothelium. Inorganic mercury produced a biphasic response in endothelium-intact aortic rings and produced only vasoconstriction in endothelium-denuded aortic rings. To study the possible underlying mechanisms for the biphasic response of mercury, increasing concentrations of mercuric chloride (10(-12)-10(-5) M) were used before and after N(G)-nitro-L-arginine methyl ester (L-NAME (10(-4) M)), glybenclamide (10(-5) M), superoxide dismutase (10 U/ml) + catalase (100 U/ml), and nifedipine (10(-4) M) treatment. Results suggest that mercury produces endothelium-dependent relaxation at low concentration mediated by endothelial-generated NO and endothelium-derived hyperpolarizing factor and endothelium-independent contraction resulting from the blockade of L-type Ca(2+) channels by generation of free radicals.

journal_name

Hum Exp Toxicol

authors

Omanwar S,Saidullah B,Ravi K,Fahim M

doi

10.1177/0960327113512341

subject

Has Abstract

pub_date

2014-09-01 00:00:00

pages

904-10

issue

9

eissn

0960-3271

issn

1477-0903

pii

0960327113512341

journal_volume

33

pub_type

杂志文章
  • Toxicity of ingested formalin and its management.

    abstract::Formaldehyde is a physiological intermediary metabolite taking part in many biological process in the body. It is a constituent of many items of daily use, including foods. It is also used in medicine for treatment of some conditions. A 40% solution of formaldehyde in water is known as formalin. Formalin is irritating...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章,评审

    doi:10.1191/096032700678815954

    authors: Pandey CK,Agarwal A,Baronia A,Singh N

    更新日期:2000-06-01 00:00:00

  • Dexmedetomidine protects blood δ-aminolevulinate dehydratase from inactivation caused by hyperoxygenation in total intravenous anesthesia.

    abstract::Delta-aminolevulinate dehydratase (δ-ALA-D) enzyme is sensitive to pro-oxidant agents, including molecular oxygen. Here, we tested whether hyperoxygenation after total intravenous (i.v.) anesthesia could interact with the type of anesthesia (dexmedetomidine, continuous infusion; 0.5 μg/kg/h or remifentanil, continuous...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327110372399

    authors: Rocha JB,Heinzmann Bulow NM,Correa EF,Scholze C,Nogueira CW,Barbosa NB

    更新日期:2011-04-01 00:00:00

  • Pralidoxime in carbaryl poisoning: an animal model.

    abstract:INTRODUCTION:Poisoning from organophosphates and carbamates is a significant cause of morbidity and mortality worldwide. Concerns have been expressed over the safety and efficacy of the use of oximes such as pralidoxime (2-PAM) in patients with carbamate poisoning in general, and more so with carbaryl poisoning specifi...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327107070849

    authors: Mercurio-Zappala M,Hack JB,Salvador A,Hoffman RS

    更新日期:2007-02-01 00:00:00

  • Clinical features and treatment of Elapidae bites: report of three cases.

    abstract::This report describes two accidents, involving snakes of the Micrurus corallinus species, where compromising respiratory function was not observed and the specific anti-elapidic serum was the single therapy used, and a third incident, probably involving Micrurus frontalis, where neostigmine was used to remedy respirat...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/096032719201100213

    authors: Coelho LK,Silva E,Espositto C,Zanin M

    更新日期:1992-03-01 00:00:00

  • Biological monitoring and questionnaire for assessing exposure to ethylenebisdithiocarbamates in a multicenter European field study.

    abstract::This study deals with pesticide exposure profile in some European countries with a specific focus on ethylenebisdithiocarbamates (EBDC). In all, 55 Bulgarian greenhouse workers, 51 Finnish potato farmers, 48 Italian vineyard workers, 42 Dutch floriculture farmers, and 52 Bulgarian zineb producers entered the study. Ea...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章,多中心研究

    doi:10.1177/0960327108100003

    authors: Fustinoni S,Campo L,Liesivuori J,Pennanen S,Vergieva T,van Amelsvoort L,Bosetti C,Van Loveren H,Colosio C

    更新日期:2008-09-01 00:00:00

  • Assessment of immunosuppressant drug carcinogenicity: standard and alternative animal models.

    abstract::Drugs intended for use in preventing allograft rejection in transplant patients are likely to be administered chronically; thus, it is normally expected that sponsors would conduct nonclinical studies to determine the carcinogenic potential of candidate compounds. For pharmaceuticals other than biologic agents, this w...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章,评审

    doi:10.1191/096032700678815837

    authors: Hastings KL

    更新日期:2000-04-01 00:00:00

  • Measurement of cholinesterase enzyme activity before and after exposure to organophosphate pesticides in farmers of a suburb region of Mazandaran, a northern province of Iran.

    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

    pub_type: 杂志文章

    doi:10.1177/0960327115584990

    authors: Pakravan N,Shokrzadeh M,Bari MA,Shadboorestan A

    更新日期:2016-03-01 00:00:00

  • A model of chlorpyrifos distribution and its biochemical effects on the liver and kidneys of rats.

    abstract::This study investigated the main target sites of chlorpyrifos (CPF), its effect on biochemical indices, and the pathological changes observed in rat liver and kidney function using gas chromatography/mass spectrometry. Adult female Wistar rats (n = 12) were randomly assigned into two groups (one control and one test g...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327115614384

    authors: Tanvir EM,Afroz R,Chowdhury M,Gan SH,Karim N,Islam MN,Khalil MI

    更新日期:2016-09-01 00:00:00

  • Inconsistent approach to the treatment of chronic digoxin toxicity in the United States.

    abstract::Evidence-based guidelines do not exist for the treatment of patients with chronic mild-moderate digoxin toxicity. We sought to evaluate differences among specialists in the use of digoxin-specific antibody fragments and the decision to admit these patients. A sample of cardiologists, emergency physicians, and medical ...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327109105405

    authors: Kirrane BM,Olmedo RE,Nelson LS,Mercurio-Zappala M,Howland MA,Hoffman RS

    更新日期:2009-05-01 00:00:00

  • Computational toxicology: Its essential role in reducing drug attrition.

    abstract::Predictive toxicology plays a critical role in reducing the failure rate of new drugs in pharmaceutical research and development. Despite recent gains in our understanding of drug-induced toxicity, however, it is urgent that the utility and limitations of our current predictive tools be determined in order to identify...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327115605440

    authors: Naven RT,Louise-May S

    更新日期:2015-12-01 00:00:00

  • Homicidal poisoning by injection of methidathion: the first ever report.

    abstract:UNLABELLED:We present the first ever case of homicidal poisoning due to injection of methidathion, an organophosphate insecticide. CASE:A 4-month-old baby presented to the emergency department with chief complaints of unconsciousness and irregular respiration. A bitter odour and an injection site with a greenish blue ...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327109348082

    authors: Ozdemir C,Kar H,Bilge Y,Batuk G,Batuk HI

    更新日期:2009-08-01 00:00:00

  • Camelford water poisoning accident: serial neuropsychological assessments and further observations on bone aluminium.

    abstract::The serial cognitive assessment of ten individuals made between 8 and 26 months after the water at Camelford in Cornwall was accidentally contaminated with aluminium sulphate, showed consistent evidence of impairment of information processing and memory. There was no obvious relationship between these impairments and ...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/096032719301200108

    authors: McMillan TM,Freemont AJ,Herxheimer A,Denton J,Taylor AP,Pazianas M,Cummin AR,Eastwood JB

    更新日期:1993-01-01 00:00:00

  • Baclofen systemic toxicity: Experimental histopathological and biochemical study.

    abstract:OBJECTIVE:The present study was designed to highlight the toxic impact of baclofen on both biochemical and histopathological aspects in rats' liver, gastric, lung, kidney, and brain tissues. METHODS:The study was performed on 30 healthy adult male albino rats divided into four groups with 5 rats in each control group,...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327117712369

    authors: Issa SY,Hafez EM,El-Banna AS,Abdel Rahman SM,AlMazroua MK,El-Hamd MA

    更新日期:2018-04-01 00:00:00

  • Induction of apoptosis in indole-3-carbinol-treated lung cancer H1299 cells via ROS level elevation.

    abstract::This study was focused on investigating the anticancer potential of indole-3-carbinol (I3C) against lung cancer H1299 cells via an increase in ROS levels. To investigate the induction of growth arrest and/or cell death in H1299 cells, a cell cycle arrest assay, terminal deoxynucleotidyl transferase (TdT)-mediated dUTP...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327120969968

    authors: Lim HM,Park SH,Nam MJ

    更新日期:2020-10-29 00:00:00

  • Teucrium polium hexane extract downregulated androgen receptor in testis and decreased fertility index in rats.

    abstract::Teucrium polium L. (Lamiaceae) is a commonly used medicinal plant in folk medicine. Among several uses, T. polium is used to treat male fertility problems. This research was conducted to study the effect of T. polium on spermatogenesis, testosterone level, androgen receptor expression, and fertility in male rats. Admi...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327116688069

    authors: Al-Tikriti A,Al-Khateeb E,Abbas MA

    更新日期:2017-12-01 00:00:00

  • Protective potential of 17β-estradiol against co-exposure of 4-hydroxynonenal and 6-hydroxydopamine in PC12 cells.

    abstract::4-hydroxynonenal (4-HNE) and 6-hydroxydopamine (6-OHDA)-mediated damage in dopaminergic neurons is well documented. Protective potential of steroidal hormone (17β-estradiol) has also been suggested. However, therapeutic potential of such promising hormone is hampered due to complex brain anatomy and physiology. Thus, ...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327110382130

    authors: Siddiqui MA,Kashyap MP,Al-Khedhairy AA,Musarrat J,Khanna VK,Yadav S,Pant AB

    更新日期:2011-08-01 00:00:00

  • Curcumin as a protector for normal cells during bortezomib therapy.

    abstract::This study evaluated the protective potential of curcumin on the possible side effects of bortezomib (Bt) therapy on normal cells in mice. The mice were segregated into three groups (n = 10) that included normal control, Bt-treated, and Bt + curcumin-treated groups. The Bt treatment resulted in significant decrease in...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327114555928

    authors: Kumar RR,Malhotra A

    更新日期:2015-07-01 00:00:00

  • Hormesis and industrial hygiene: a new hypothesis for low-dose response in occupational risk assessment.

    abstract::The study of Jayjock and Lewis, 'Implication of Hormesis for Industrial Hygiene', represents a challenge for the scientific community to consider hormesis as a possible working hypothesis for redefining risk assessment strategy for low-dose exposures in the realm of industrial hygiene. This invited commentary aims at ...

    journal_title:Human & experimental toxicology

    pub_type: 评论,杂志文章

    doi:10.1191/0960327102ht269xx

    authors: Carelli G,Iavicoli I,Castellino N

    更新日期:2002-07-01 00:00:00

  • Role of inhibiting Chk1-p53 pathway in hepatotoxicity caused by chronic arsenic exposure from coal-burning.

    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

    authors: Yang Y,Liu C,Xie T,Wang D,Chen X,Ma L,Zhang A

    更新日期:2021-01-27 00:00:00

  • Differences in the radiotoxicity of two plutonium isotopes in cells in vitro: can they be ascribed to different handling by the cells?

    abstract::Exposure of Co631 cells to plutonium leads to increasing cell death depending on the dose and incubation time. The effects, however, are more pronounced with 239Pu, than with 238Pu. Uptake and binding of the two radionuclides during a 5-h incubation are about equal, but 238Pu is lost more rapidly from the cell. There ...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/096032719201100303

    authors: Boxler C,Rau W,Planas-Bohne F

    更新日期:1992-05-01 00:00:00

  • Protective effects of Chinese and Brazilian propolis treatment against hepatorenal lesion in diabetic rats.

    abstract::Diabetes mellitus promoted an overproduction of free radicals and an increased incidence of both diabetic nephropathy and liver disease. In this report, we evaluated the effects of Chinese and Brazilian propolis on streptozotocin-induced hepatorenal injury in rats. The results demonstrated that Chinese propolis-treate...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327110387456

    authors: Zhu W,Li YH,Chen ML,Hu FL

    更新日期:2011-09-01 00:00:00

  • Novel effect of Daflon and low-dose γ-radiation in modulation of thioacetamide-induced hepatic encephalopathy in male albino rats.

    abstract::This study was designed to evaluate the hepato and neuroprotective activity of Daflon and low-dose γ radiation on thioacetamide (TAA)-induced liver damage and hepatic encephalopathy (HE) in rats. Effect of daily Daflon treatment (100 mg/kg body weight, Per OS (p.o.) for consecutive 3 days) and/or fractionated low-dose...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327116637657

    authors: Abdel-Rafei M,Amin MM,Hasan HF

    更新日期:2017-01-01 00:00:00

  • The ability of Warburgia salutaris extracts to protect against crystalline silica-induced cell injury.

    abstract::In Southern Africa, the medicinal plant Warburgia salutaris is commonly used for the treatment of inflammatory and other diseases. The methanol extracts of W. salutaris were investigated with regard to a) production of proinflammatory cytokines tumor necrosis factor-alpha, interleukin-1beta, and interferon-gamma; b) a...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327108099536

    authors: Leshwedi M,Steenkamp V,Dutton M,Gulumian M

    更新日期:2008-11-01 00:00:00

  • The effect of short-term intoxication of rats with pentabromodiphenyl ether (in mixture mimic commercial products).

    abstract::Until quite recently, pentabromodiphenyl ether (PentaBDE) was most commonly used as a flame retardant. Due to the considerably long atmospheric half-life of PentaBDE and its contribution to environmental pollution, it is categorized as a persistent organic pollutant (POP). As the data on the toxicity of PentaBDE is ra...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327110371261

    authors: Bruchajzer E,Frydrych B,Sporny S,Szymańska JA

    更新日期:2011-05-01 00:00:00

  • Research into individual predisposition to develop acute rhabdomyolysis attributed to fenoverine.

    abstract::A xenobiotic, well tolerated by the majority of treated patients, can cause serious complications in patients with individual susceptibility. Based on the hypothesis that such a phenomenon may occur in rare cases of rhabdomyolysis attributed to fenoverine (DCI), we designed a protocol to look for a genetic predisposit...

    journal_title:Human & experimental toxicology

    pub_type: 临床试验,杂志文章

    doi:10.1177/096032719601501004

    authors: Jouglard J,Kozak-Ribbens G,de Haro L,Cozzone PJ

    更新日期:1996-10-01 00:00:00

  • DNA damage and methylation induced by organophosphate flame retardants: Tris(2-chloroethyl) phosphate and tris(1-chloro-2-propyl) phosphate in human peripheral blood mononuclear cells.

    abstract::Phosphorus flame retardants are a group of chemicals that are used to slow or prevent the spread of fire. These compounds have been detected in different environments including human organism. In the present study, we have investigated DNA-damaging potential and effect on DNA methylation of tris(2-chloroethyl) phospha...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327119839174

    authors: Bukowski K,Wysokinski D,Mokra K,Wozniak K

    更新日期:2019-06-01 00:00:00

  • Prevention of paraquat toxicity in suspensions of alveolar type II cells by paraquat-specific antibodies.

    abstract::1. The herbicide, paraquat, is accumulated by the energy-dependent polyamine uptake pathway of alveolar type II cells. There it undergoes redox cycling that results in an amplified production of toxic reactive oxygen species and depletion of NADPH and other reducing equivalents. These processes account for the lung be...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/096032719401300808

    authors: Chen N,Bowles MR,Pond SM

    更新日期:1994-08-01 00:00:00

  • Organochlorine and organophosphorus pesticide residues in breast milk from Bhopal, Madhya Pradesh, India.

    abstract::HCH isomers, endosulfan, malathion, chlorpyrifos, and methyl-parathion were monitored in human milk samples from Bhopal, Madhya Pradesh. The endosulfan concentrations were highest and exceeded the sigma-HCH, chlorpyrifos, and malathion concentrations by 3.5-, 1.5-, and 8.4-fold, respectively. Through breast milk, infa...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1191/0960327103ht321oa

    authors: Sanghi R,Pillai MK,Jayalekshmi TR,Nair A

    更新日期:2003-02-01 00:00:00

  • Recent advances in understanding transforming growth factor beta regulation of orofacial development.

    abstract::Members of the transforming growth factor (TGF) family have emerged as critical contributors to the choreography of cellular and tissue interactions underlying morphogenesis of the orofacial region. The TGFs beta, and their downstream effector molecules, the Smads, play a pivotal role in normal as well as abnormal dev...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章,评审

    doi:10.1191/0960327105ht492oa

    authors: Greene RM,Pisano MM

    更新日期:2005-01-01 00:00:00

  • Safety assessment of nicotinamide riboside, a form of vitamin B3.

    abstract::Nicotinamide riboside (NR) is a naturally occurring form of vitamin B3 present in trace amounts in some foods. Like niacin, it has been shown to be a precursor in the biosynthesis of nicotinamide adenine dinucleotide (NAD+). The safety of Niagen™, a synthetic form of NR, was determined using a bacterial reverse mutage...

    journal_title:Human & experimental toxicology

    pub_type: 杂志文章

    doi:10.1177/0960327115626254

    authors: Conze DB,Crespo-Barreto J,Kruger CL

    更新日期:2016-11-01 00:00:00