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Margiana R, Hamoud Alshahrani S, Kayumova D, Hussien Radie Alawadi A, Hjazi A, Alsalamy A, Qasim QA, Juyal A, Garousi N. Association between maternal exposure to arsenic by drinking water during pregnancy and risk of preterm birth: a systematic review and meta-analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2024; 34:2947-2956. [PMID: 37967266 DOI: 10.1080/09603123.2023.2280155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 11/02/2023] [Indexed: 11/17/2023]
Abstract
The relation of exposure to arsenic in drinking water during pregnancy to the risk of preterm birth (PTB) was contradictory. This meta-analysis aimed to examine the association between drinking water arsenic and PTB. A systematic search in PubMed and Scopus was performed to achieve all relevant studies. Odds ratios (OR) and 95% confidence intervals (CI) were used to pool data using the random-effect models. Overall, 11 studies with a total sample size of 3,404,189 participants were included in the meta-analysis. Arsenic exposure through drinking water during pregnancy was related to an increased risk of PTB (OR = 1.06; 95%CI = 1.01-1.10 for highest versus lowest category of arsenic), with significant heterogeneity across the studies (I2 = 84.8%, P = 0.001). This finding was supported by cohort studies (OR = 1.05; 95%CI = 1.01-1.10). This meta-analysis proposes that higher arsenic exposure in drinking water may be a risk factor for PTB.
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Affiliation(s)
- Ria Margiana
- Department of Anatomy, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
- Master's Programme Biomedical Sciences, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia
- Andrology Program, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
- Dr. Soetomo General Academic Hospital, Surabaya, Indonesia
| | | | - Dilrabo Kayumova
- Department of Obstetrics and Gynecology, Tashkent Medical Academy, Tashkent, Uzbekistan
| | - Ahmed Hussien Radie Alawadi
- College of technical engineering, the Islamic University, Najaf, Iraq
- College of technical engineering, the Islamic University of Al Diwaniyah, Al Diwaniyah, Iraq
| | - Ahmed Hjazi
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Ali Alsalamy
- College of technical engineering, Imam Ja'afar Al-Sadiq University, Al-Muthanna, Iraq
| | | | - Ashima Juyal
- Electronics & Communication engineering, Uttaranchal Institute of Technology, Uttaranchal University, Dehradun, India
| | - Nazila Garousi
- Department of Clinical Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
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Thangapandiyan S, Hema T, Miltonprabu S, Paulpandi M, Dutta U. Sulforaphane ameliorate Arsenic induced cardiotoxicity in rats: Role of PI3k/Akt mediated Nrf2 signaling pathway. J Biochem Mol Toxicol 2024; 38:e23576. [PMID: 37906532 DOI: 10.1002/jbt.23576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 09/13/2023] [Accepted: 10/20/2023] [Indexed: 11/02/2023]
Abstract
Arsenic (As) toxicity can generate reactive free radicals, which play an important role in the evolution of cardiomyopathy. The aim of this research is to see if sulforaphane (SFN) protects against As-induced heart damage, oxidative stress, and mitochondrial complex dysfunction via the PI3K/Akt/Nrf2 signaling pathway. The rats were placed into four groups, each with eight rats. Group 1: Normal rats (control group); Group 2: Treatment group (5 mg/kg body weight); Group 3: SFN+As-treatment group (80 mg/kg body weight + 5 mg/kg body weight); Group 4: SFN group only (80 mg/kg body weight). The swot will last 4 weeks. At the end of the intermission (28 days), all of the rats starved overnight and killed with cervical decapitation. As administration considerably (p < 0.05) inflated the extent of free radicals (O2-, OH-), lipoid peroxidation (malondialdehyde, 4-hydroxynonenal), lipoid profile (low-density lipoprotein-cholesterol, very low-density lipoprotein-cholesterol (VLDL-C), total cholesterol, triglyceride, and phospholipids), cardiac Troponin (cTnT&I), and Mitochondrial complex III. A noteworthy (p < 0.05) diminish the level of HDL-C, Mitochondrial complex I and II, enzymatic (superoxide dismutase, catalase, and glutathione peroxidase), and nonenzymatic antioxidant (glutathione and total sulfhydryl groups) and PI3k, Akt, and Nrf2 sequence in As treated rats. The western blot, real-time polymerase chain reaction, flowcytometric, and histology studies all corroborated the biochemical findings which revealed significant heart damage in rats. Pretreatment with SFN significantly (p < 0.05) reduced the invitro free radicals, lipid oxidative indicators, mitochondrial complex, lipid profiles, and increased phase II antioxidants in the heart. This result shows that dietary supplementation of SFN protects against As-induced cardiotoxicity via PI3k/Akt/Nrf2 pathway in rats.
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Affiliation(s)
| | - Tamilselvan Hema
- Department of Zoology, Bharathiar University, Coimbatore, Tamilnadu, India
| | - Selvaraj Miltonprabu
- Department of Zoology, University of Madras, Guindy Campus, Chennai, Tamilnadu, India
| | - Manickam Paulpandi
- Molecular Proteomics Lab, Bharathiar University, Coimbatore, Tamilnadu, India
| | - Uma Dutta
- Department of Zoology, Cotton University, Guwahati, Assam, India
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Zhang Z, Wang R, He P, Dai Y, Duan S, Li M, Shen Z, Li X, Sun J. Study on the correlation and interaction between metals and dyslipidemia: a case-control study in Chinese community-dwelling elderly. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:105756-105769. [PMID: 37715907 DOI: 10.1007/s11356-023-29695-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 08/31/2023] [Indexed: 09/18/2023]
Abstract
Previous studies on the association between metals and dyslipidemia are not completely consistent. There are few studies investigating the relationship between mixed metal exposure and dyslipidemia as well as the effects of metals on dyslipidemia in community-dwelling elderly. To evaluate the correlations and interaction effect between the urinary concentrations of metals and the risk of dyslipidemia in community-dwelling elderly. We designed a case-control study to assess the correlation between urine metals and dyslipidemia in elderly people in the Yinchuan. The urinary levels of 13 metals, including calcium, vanadium, iron, cobalt, zinc, copper, arsenic, selenium, molybdenum, cadmium, tellurium, and thallium, were measured by inductively coupled plasma-mass spectrometry (ICP-MS), and the blood biochemical analyzer was used to measure the blood lipid levels of 3384 senior individuals from four different areas of Yinchuan city. Logistic regression and restricted cubic splines (RCS) were used to explore the correlation and dose-response relationship between urinary metals and the risk of dyslipidemia. Least absolute shrinkage and selection operator (LASSO) regression was used to select metals, and then weighted quantile sum (WQS) regression was used to explore the weight of each metal in mixed metals. Bayesian kernel machine regression (BKMR) was used to explore the interactions between metals on dyslipidemia risk. (1) After selection by LASSO regression, in the multi-metal model, compared with the lowest quartile, the adjusted ORs (95%CI) of the highest quartiles were 0.47 (0.37-0.60) for Fe, 1.43 (1.13-1.83) for Zn, 1.46 (1.11-1.92) for As, 0.59 (0.44-0.80) for Se, 1.53 (1.18-2.00) for Mo, and 1.36 (1.07-1.73) for Te. (2) In the WQS regression model, Fe and Mo accounted for the largest weight in the negative and positive effects of dyslipidemia, respectively. (3) In the BKMR model, there may be a positive interaction between Te and Se on dyslipidemia. Among the mixed metals, Fe, As, Se, Mo, and Te were associated with the prevalence of dyslipidemia, with Fe and Mo contributing the most. There may be certain interactions between Te and Se.
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Affiliation(s)
- Zhongyuan Zhang
- School of Public Health, Ningxia Medical University, No.1160, Shengli Street, Xingqing District, Yinchuan, 750004, People's Republic of China
- Ningxia Key Laboratory of Environmental Factors and Chronic Disease Control, Yinchuan Ningxia, 750004, People's Republic of China
| | - Rui Wang
- School of Public Health, Ningxia Medical University, No.1160, Shengli Street, Xingqing District, Yinchuan, 750004, People's Republic of China
- Ningxia Key Laboratory of Environmental Factors and Chronic Disease Control, Yinchuan Ningxia, 750004, People's Republic of China
| | - Pei He
- School of Public Health, Ningxia Medical University, No.1160, Shengli Street, Xingqing District, Yinchuan, 750004, People's Republic of China
- Ningxia Key Laboratory of Environmental Factors and Chronic Disease Control, Yinchuan Ningxia, 750004, People's Republic of China
| | - Yuqing Dai
- School of Public Health, Ningxia Medical University, No.1160, Shengli Street, Xingqing District, Yinchuan, 750004, People's Republic of China
- Ningxia Key Laboratory of Environmental Factors and Chronic Disease Control, Yinchuan Ningxia, 750004, People's Republic of China
| | - Siyu Duan
- School of Public Health, Ningxia Medical University, No.1160, Shengli Street, Xingqing District, Yinchuan, 750004, People's Republic of China
- Ningxia Key Laboratory of Environmental Factors and Chronic Disease Control, Yinchuan Ningxia, 750004, People's Republic of China
| | - Meiyan Li
- School of Public Health, Ningxia Medical University, No.1160, Shengli Street, Xingqing District, Yinchuan, 750004, People's Republic of China
- Ningxia Key Laboratory of Environmental Factors and Chronic Disease Control, Yinchuan Ningxia, 750004, People's Republic of China
| | - Zhuoheng Shen
- School of Public Health, Ningxia Medical University, No.1160, Shengli Street, Xingqing District, Yinchuan, 750004, People's Republic of China
- Ningxia Key Laboratory of Environmental Factors and Chronic Disease Control, Yinchuan Ningxia, 750004, People's Republic of China
| | - Xiaoyu Li
- School of Public Health, Ningxia Medical University, No.1160, Shengli Street, Xingqing District, Yinchuan, 750004, People's Republic of China
- Ningxia Key Laboratory of Environmental Factors and Chronic Disease Control, Yinchuan Ningxia, 750004, People's Republic of China
| | - Jian Sun
- School of Public Health, Ningxia Medical University, No.1160, Shengli Street, Xingqing District, Yinchuan, 750004, People's Republic of China.
- Ningxia Key Laboratory of Environmental Factors and Chronic Disease Control, Yinchuan Ningxia, 750004, People's Republic of China.
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Abstract
Arsenic toxicity is a major concern due to its deleterious consequences for human health. Rapid industrialization also has weakened the quality of the environment by introducing pollutants that may disrupt balanced ecosystems, adversely and irreversibly impacting humans, plants, and animals. Arsenic, an important toxicant among all environmental hazards, can lead to several detrimental effects on cells and organs, impacting the overall quality of life. Nevertheless, arsenic also has a rich history as a chemotherapeutic agent used in ancient days for the treatment of diseases such as malaria, cancer, plague, and syphilis when other chemotherapeutic agents were yet to be discovered. Arsenicosis-mediated disorders remain a serious problem due to the lack of effective therapeutic options. Initially, chelation therapy was used to metabolically eliminate arsenic by forming a complex, but adverse effects limited their pharmacological use. More recently, plant-based products have been found to provide significant relief from the toxic effects of arsenic poisoning. They act by different mechanisms affecting various cellular processes. Phytoconstituents such as curcumin, quercetin, diallyl trisulfide, thymoquinone, and others act via various molecular pathways, primarily by attenuating oxidative damage, membrane damage, DNA damage, and proteinopathies. Nonetheless, most of the phytochemicals reviewed here protect against the adverse effects of metal or metalloid exposure, supporting their consideration as alternatives to chelation therapy. These agents, if used prophylactically and in conjunction with other chemotherapeutic agents, may provide an effective approach for management of arsenic toxicity. In a few instances, such strategies like coadministration of phytochemicals with a known chelating agent have led to more pronounced elimination of arsenic from the body with lesser off-site adverse effects. This is possible because combination treatment ensures the use of a reduced dose of chelating agent with a phytochemical without compromising treatment. Thus, these therapies are more practical than conventional therapeutic agents in ameliorating arsenic-mediated toxicity. This review summarizes the potential of phytochemicals in alleviating arsenic toxicity on the basis of available experimental and clinical evidence.
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Affiliation(s)
- Sabiya Samim Khan
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Hyderabad 500037, India
| | - Ankita Sharma
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research-Raebareli, Lucknow 226020, India
| | - Swaran J S Flora
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research-Raebareli, Lucknow 226020, India
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Barguilla I, Peremartí J, Bach J, Marcos R, Hernández A. Role of As3mt and Mth1 in the genotoxic and carcinogenic effects induced by long-term exposures to arsenic in MEF cells. Toxicol Appl Pharmacol 2020; 409:115303. [DOI: 10.1016/j.taap.2020.115303] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/13/2020] [Accepted: 10/21/2020] [Indexed: 11/30/2022]
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Arsenic metabolism differs between child and adult patients during acute arsenic poisoning. Toxicol Appl Pharmacol 2020; 410:115352. [PMID: 33264645 DOI: 10.1016/j.taap.2020.115352] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 11/19/2020] [Accepted: 11/24/2020] [Indexed: 11/22/2022]
Abstract
Epidemiological studies on chronic arsenic poisoning have clarified the relationship between various adverse effects and methylation efficiency or methylation capacity. However, no study has similarly investigated such effects on patients with acute arsenic poisoning. In the present work, we studied 61 patients with acute oral arsenic poisoning occurring after consumption of an arsenic trioxide-laced meal (curry soup). The cohort included children (defined as under 15 year old [y/o], n = 22) and adults (over 16 y/o, n = 39) whose urinary arsenic profiles were analyzed. None of these patients had received treatment with chelating agents. The estimated median (IQR) arsenic intake was 64.5 mg (48.3-80.5 mg) in children and 76.0 mg (56.0-91.0 mg) in adults, and these values were not significantly different. Symptoms of poisoning in children improved approximately 1 week after hospitalization. However, the symptoms in most adults deteriorated with severe signs of arsenic poisoning. Urinary arsenic profiles of all the patients were analyzed to obtain the following information: % monomethylarsonic acid (MMA), % dimethylarsinic acid (DMA), second methylation ratio (DMA/MMA), and secondary methylation index (SMI, DMA/MMA + DMA). The levels of these parameters may help identify patients at risk for worsening symptoms. %MMA, an indicator of incomplete methylation, increased more in adults, who experienced more severe symptom progression, compared with children. In contrast, %DMA, which indicates more complete and efficient methylation, increased particularly in children with mild symptoms. Overall the present results indicate that children possess an excellent capacity for methylation (second methylation ratio) of arsenic to DMA and therefore, experience relatively less severe progression of symptomology during acute arsenic poisoning.
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Zhu Y, Costa M. Metals and molecular carcinogenesis. Carcinogenesis 2020; 41:1161-1172. [PMID: 32674145 PMCID: PMC7513952 DOI: 10.1093/carcin/bgaa076] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/19/2020] [Accepted: 07/13/2020] [Indexed: 12/11/2022] Open
Abstract
Many metals are essential for living organisms, but at higher doses they may be toxic and carcinogenic. Metal exposure occurs mainly in occupational settings and environmental contaminations in drinking water, air pollution and foods, which can result in serious health problems such as cancer. Arsenic (As), beryllium (Be), cadmium (Cd), chromium (Cr) and nickel (Ni) are classified as Group 1 carcinogens by the International Agency for Research on Cancer. This review provides a comprehensive summary of current concepts of the molecular mechanisms of metal-induced carcinogenesis and focusing on a variety of pathways, including genotoxicity, mutagenesis, oxidative stress, epigenetic modifications such as DNA methylation, histone post-translational modification and alteration in microRNA regulation, competition with essential metal ions and cancer-related signaling pathways. This review takes a broader perspective and aims to assist in guiding future research with respect to the prevention and therapy of metal exposure in human diseases including cancer.
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Affiliation(s)
- Yusha Zhu
- Department of Environmental Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Max Costa
- Department of Environmental Medicine, New York University Grossman School of Medicine, New York, NY, USA
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Fanoudi S, Alavi MS, Karimi G, Hosseinzadeh H. Milk thistle ( Silybum Marianum) as an antidote or a protective agent against natural or chemical toxicities: a review. Drug Chem Toxicol 2020; 43:240-254. [PMID: 30033764 DOI: 10.1080/01480545.2018.1485687] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 05/17/2018] [Accepted: 05/31/2018] [Indexed: 12/11/2022]
Abstract
Biological and chemical agents cause dangerous effects on human health via different exposing ways. Recently, herbal medicine is considered as a biological and safe treatment for toxicities. Silybum marianum (milk thistle), belongs to the Asteraceae family, possesses different effects such as hepatoprotective, cardioprotective, neuroprotective, anti-inflammatory and anti-carcinogenic activities. Several studies have demonstrated that this plant has protective properties against toxic agents. Herein, the protective effects of S. marianum and its main component, silymarin, which is the mixture of flavonolignans including silibinin, silydianin and silychristin acts against different biological (mycotoxins, snake venoms, and bacterial toxins) and chemical (metals, fluoride, pesticides, cardiotoxic, neurotoxic, hepatotoxic, and nephrotoxic agents) poisons have been summarized. This review reveals that main protective effects of milk thistle and its components are attributed to radical scavenging, anti-oxidative, chelating, anti-apoptotic properties, and regulating the inflammatory responses.
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Affiliation(s)
- Sahar Fanoudi
- Department of Pharmacology Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohaddeseh Sadat Alavi
- Department of Pharmacology Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gholamreza Karimi
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Pharmacodynamics and Toxicology School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, IR, Iran
| | - Hossein Hosseinzadeh
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Pharmacodynamics and Toxicology School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, IR, Iran
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Calatayud M, Farias SS, de Paredes GS, Olivera M, Carreras NÁ, Giménez MC, Devesa V, Vélez D. Arsenic exposure of child populations in Northern Argentina. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 669:1-6. [PMID: 30877956 DOI: 10.1016/j.scitotenv.2019.02.415] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 02/04/2019] [Accepted: 02/26/2019] [Indexed: 06/09/2023]
Abstract
Chronic exposure to inorganic arsenic (As) is associated with numerous adverse effects. Argentina is one of the countries affected by arsenicism; however, there are few studies that evaluate inorganic As exposure and its effects on child population. The aim of this study is to evaluate exposure to As through water and food in child populations living in the provinces of Santiago del Estero and Chaco (n = 101), and to determine the impact of this exposure analysing biomarkers of exposure (urine and hair As contents) and effect [8-oxo-7,8-dihydro-2'-deoxyguanosine (8-OHdG)]. The populations selected live in three areas with different levels of As in the drinking water (Santa Teresa de Carballo, 0.925 mg/L; Taco Pozo, 0.210 mg/L; Jumi Pozo, 0.016 mg/L). The As intakes through water and food are especially high in the areas with the greatest As exposure (Santa Teresa de Carballo, 1575 ± 8 μg/day; Taco Pozo, 386 ± 8 μg/day; Jumi Pozo, 39 ± 1 μg/day). The total As contents in most of the samples of hair (0.11-13.11 mg/kg) and urine (31-4258 μg/g creatinine) are higher than the reference values (hair: 1 mg/kg; urine: 50 μg/g creatinine). The increase in the level of As exposure alters the profile of metabolites in urine, with a decrease of dimethylarsinic acid (10%) and an increase in the percentages of monomethylarsonic acid (4%) and inorganic As (6%). The results also show high values of 8-OHdG (3.7-37.8 μg/g creatinine), a oxidative DNA damage marker, in the two areas with greater As exposure.
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Affiliation(s)
- Marta Calatayud
- Instituto de Agroquímica y Tecnología de Alimentos (CSIC), C/ Agustín Escardino 7, 46980 Paterna, Valencia, Spain
| | - Silvia Sara Farias
- Investigador Consulto Gerencia Química, Gerencia de Área de Seguridad y Ambiente, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina
| | | | - Mónica Olivera
- Cátedra de Toxicología y Química Legal, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
| | | | | | - Vicenta Devesa
- Instituto de Agroquímica y Tecnología de Alimentos (CSIC), C/ Agustín Escardino 7, 46980 Paterna, Valencia, Spain
| | - Dinoraz Vélez
- Instituto de Agroquímica y Tecnología de Alimentos (CSIC), C/ Agustín Escardino 7, 46980 Paterna, Valencia, Spain.
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Yamauchi H, Takata A. Past and Current Arsenic Poisonings. CURRENT TOPICS IN ENVIRONMENTAL HEALTH AND PREVENTIVE MEDICINE 2019. [DOI: 10.1007/978-981-13-2565-6_1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Fallah M, Moghble N, Javadi I, Bahadoran H, Shahriary A. Effect of Curcumin and N-Acetylcysteine on Brain Histology and Inflammatory Factors (MMP-2, 9 and TNF-α) in Rats Exposed to Arsenic. PHARMACEUTICAL SCIENCES 2018. [DOI: 10.15171/ps.2018.39] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Background: Arsenic is a toxic element that widely widespread in environment. Inflammation is now considered as one of the major mechanisms implicated in arsenic poisoning. Curcumin (Cur) and N-acetylcysteine (NAC) are potential antioxidants that protect cells against inflammation. This study aimed to compare the protective effect of Cur and NAC on brain histology and inflammatory factors, including matrix metalloproteinases-2, -9 (MMP-2, 9) and tumor necrosis factor-α (TNF-α) in rats exposed to single dose of arsenic. Methods: Rats were exposed to single dose of arsenic (20mg/kg, by gavage) for 30 days and then treated with 300mg/kg NAC (by gavage) and 100mg/kg Cur (by gavage), individually. Serum level of TNF-α was measured using specific ELISA kits. MMP2 and MMP9 contents were measured using Gelatin Zymography method. Brain samples were collected for histopathological and morphological examinations. Results: Arsenic treatment induced white matter lesions and cellular damages at hippocampal CA1 area of the brain. The number of hippocampal CA1 pyramidal cells was significantly declined in arsenic exposed rats (p<0.05). Treatment with NAC and Cur improved these abnormalities. The mean levels of MMP2, MMP9 and TNF-α inflammatory biomarkers were slightly declined after treatment with NAC and Cur (p>0.05). Conclusion: NAC and Cur play an important role in protecting the hippocampal CA1 cells injury induced by arsenic.
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Affiliation(s)
- Mostafa Fallah
- Department of Toxicology, Faculty of Pharmacy, Islamic Azad University, Shahreza Branch, Shahreza, Iran
| | - Najmeh Moghble
- Department of Toxicology, Faculty of Pharmacy, Islamic Azad University, Shahreza Branch, Shahreza, Iran
| | - Iraj Javadi
- Department of Toxicology, Faculty of Pharmacy, Islamic Azad University, Shahreza Branch, Shahreza, Iran
| | - Hossein Bahadoran
- Department of Anatomy, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Alireza Shahriary
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
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Cheng H, Hu P, Wen W, Liu L. Relative miRNA and mRNA expression involved in arsenic methylation. PLoS One 2018; 13:e0209014. [PMID: 30543710 PMCID: PMC6292570 DOI: 10.1371/journal.pone.0209014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 11/27/2018] [Indexed: 02/06/2023] Open
Abstract
Three arsenic species in urine are measured using an atomic absorption spectrophotometer. RT-PCR is performed to detect the expression levels of AS3MT, 3 miRNAs, and 17 relative mRNAs in 43 workers producing arsenic trioxide, 36 workers who stopped exposure to arsenic for 85 days, and 24 individuals as the control group. The concentrations of urinary arsenic are very high in workers. A negative correlation between AS3MT and MiR-548c-3p is found. There exist significant changes for most selected miRNAs and mRNAs in workers. There are no significant differences between workers who stopped exposure to arsenic and the control group for most miRNAs and mRNAs, but the MiR-548c-3p levels show significant changes. Similar positive correlations between the expression of AS3MT and all selected mRNAs are found. Negative correlations between the expression of MiR-548c-3p and many relative mRNAs are found as well. AS3MT and MiR-548c-3p may regulate arsenic methylation jointly, which when involved in a group of relative mRNAs may play roles in arsenic metabolism and epigenetic changes caused by this metabolism.
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Affiliation(s)
- Huirong Cheng
- Department of Occupational Health, Yunnan Provincial Center for Disease Control and Prevention, Kunming, Yunnan, China
| | - Pei Hu
- Department of Occupational Health, Yunnan Provincial Center for Disease Control and Prevention, Kunming, Yunnan, China
| | - Weihua Wen
- Department of Occupational Health, Yunnan Provincial Center for Disease Control and Prevention, Kunming, Yunnan, China
- * E-mail: (LL); (WW)
| | - Ling Liu
- First Affiliated Hospital of Kunming Medical University, Kunming, People’s Republic of China
- * E-mail: (LL); (WW)
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Tahara K, Pan L, Ono T, Hisaeda Y. Learning from B 12 enzymes: biomimetic and bioinspired catalysts for eco-friendly organic synthesis. Beilstein J Org Chem 2018; 14:2553-2567. [PMID: 30410616 PMCID: PMC6204771 DOI: 10.3762/bjoc.14.232] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 09/13/2018] [Indexed: 01/12/2023] Open
Abstract
Cobalamins (B12) play various important roles in vivo. Most B12-dependent enzymes are divided into three main subfamilies: adenosylcobalamin-dependent isomerases, methylcobalamin-dependent methyltransferases, and dehalogenases. Mimicking these B12 enzyme functions under non-enzymatic conditions offers good understanding of their elaborate reaction mechanisms. Furthermore, bio-inspiration offers a new approach to catalytic design for green and eco-friendly molecular transformations. As part of a study based on vitamin B12 derivatives including heptamethyl cobyrinate perchlorate, we describe biomimetic and bioinspired catalytic reactions with B12 enzyme functions. The reactions are classified according to the corresponding three B12 enzyme subfamilies, with a focus on our recent development on electrochemical and photochemical catalytic systems. Other important reactions are also described, with a focus on radical-involved reactions in terms of organic synthesis.
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Affiliation(s)
- Keishiro Tahara
- Department of Material Science, Graduate School of Material Science, University of Hyogo, 3-2-1, Kouto, Kamigori, Ako 678-1297, Japan
| | - Ling Pan
- Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Toshikazu Ono
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Center for Molecular Systems (CMS), Kyushu University, Fukuoka 819-0395, Japan.,PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Yoshio Hisaeda
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Center for Molecular Systems (CMS), Kyushu University, Fukuoka 819-0395, Japan
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14
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Mannan T, Ahmed S, Akhtar E, Ahsan KB, Haq A, Kippler M, Vahter M, Raqib R. Associations of Arsenic Exposure With Telomere Length and Naïve T Cells in Childhood—A Birth Cohort Study. Toxicol Sci 2018; 164:539-549. [DOI: 10.1093/toxsci/kfy105] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Tania Mannan
- Infectious Diseases Division, icddr,b, Dhaka 1212, Bangladesh
- Department of Immunology, Bangladesh University of Health Sciences, Dhaka 1216, Bangladesh
| | - Sultan Ahmed
- Infectious Diseases Division, icddr,b, Dhaka 1212, Bangladesh
| | - Evana Akhtar
- Infectious Diseases Division, icddr,b, Dhaka 1212, Bangladesh
| | | | - Ahsanul Haq
- Infectious Diseases Division, icddr,b, Dhaka 1212, Bangladesh
| | - Maria Kippler
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, SE 171 77, Sweden
| | - Marie Vahter
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, SE 171 77, Sweden
| | - Rubhana Raqib
- Infectious Diseases Division, icddr,b, Dhaka 1212, Bangladesh
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15
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Akanda MR, Tae HJ, Kim IS, Ahn D, Tian W, Islam A, Nam HH, Choo BK, Park BY. Hepatoprotective Role of Hydrangea macrophylla against Sodium Arsenite-Induced Mitochondrial-Dependent Oxidative Stress via the Inhibition of MAPK/Caspase-3 Pathways. Int J Mol Sci 2017; 18:ijms18071482. [PMID: 28698525 PMCID: PMC5535972 DOI: 10.3390/ijms18071482] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 06/30/2017] [Accepted: 07/05/2017] [Indexed: 12/18/2022] Open
Abstract
Sodium arsenite (NaAsO2) has been recognized as a worldwide health concern. Hydrangea macrophylla (HM) is used as traditional Chinese medicine possessing antioxidant activities. The study was performed to investigate the therapeutic role and underlying molecular mechanism of HM on NaAsO2-induced toxicity in human liver cancer (HepG2) cells and liver in mice. The hepatoprotective role of HM in HepG2 cells was assessed by using 3-(4,5-dimethylthiazol-2-Yl)-2,5-diphenyltetrazolium bromide (MTT), reactive oxygen species (ROS), and lactate dehydrogenase (LDH) assays. Histopathology, lipid peroxidation, serum biochemistry, quantitative real-time polymerase chain reaction (qPCR) and Western blot analyses were performed to determine the protective role of HM against NaAsO2 intoxication in liver tissue. In this study, we found that co-treatment with HM significantly attenuated the NaAsO2-induced cell viability loss, intracellular ROS, and LDH release in HepG2 cells in a dose-dependent manner. Hepatic histopathology, lipid peroxidation, and the serum biochemical parameters alanine aminotransferase (ALT) and aspartate aminotransferase (AST) were notably improved by HM. HM effectively downregulated the both gene and protein expression level of the mitogen-activated protein kinase (MAPK) cascade. Moreover, HM well-regulated the Bcl-2-associated X protein (Bax)/B-cell lymphoma-2 (Bcl-2) ratio, remarkably suppressed the release of cytochrome c, and blocked the expression of the post-apoptotic transcription factor caspase-3. Therefore, our study provides new insights into the hepatoprotective role of HM through its reduction in apoptosis, which likely involves in the modulation of MAPK/caspase-3 signaling pathways.
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Affiliation(s)
- Md Rashedunnabi Akanda
- College of Veterinary Medicine and Biosafety Research Institute, Chonbuk National University, Iksan 54596, Korea.
- Department of Pharmacology and Toxicology, Sylhet Agricultural University, Sylhet 3100, Bangladesh.
| | - Hyun-Jin Tae
- College of Veterinary Medicine and Biosafety Research Institute, Chonbuk National University, Iksan 54596, Korea.
| | - In-Shik Kim
- College of Veterinary Medicine and Biosafety Research Institute, Chonbuk National University, Iksan 54596, Korea.
| | - Dongchoon Ahn
- College of Veterinary Medicine and Biosafety Research Institute, Chonbuk National University, Iksan 54596, Korea.
| | - Weishun Tian
- College of Veterinary Medicine and Biosafety Research Institute, Chonbuk National University, Iksan 54596, Korea.
| | - Anowarul Islam
- College of Veterinary Medicine and Biosafety Research Institute, Chonbuk National University, Iksan 54596, Korea.
| | - Hyeon-Hwa Nam
- Department of Crop Science and Biotechnology, Chonbuk National University, Jeonju 54896, Korea.
| | - Byung-Kil Choo
- Department of Crop Science and Biotechnology, Chonbuk National University, Jeonju 54896, Korea.
| | - Byung-Yong Park
- College of Veterinary Medicine and Biosafety Research Institute, Chonbuk National University, Iksan 54596, Korea.
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16
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Saha S, Rashid K, Sadhukhan P, Agarwal N, Sil PC. Attenuative role of mangiferin in oxidative stress-mediated liver dysfunction in arsenic-intoxicated murines. Biofactors 2016; 42:515-532. [PMID: 27018134 DOI: 10.1002/biof.1276] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 02/16/2016] [Accepted: 02/19/2016] [Indexed: 12/30/2022]
Abstract
Mangiferin (MAG), a natural xanthone mainly derived from mangoes, possesses great antioxidative potentials. The present study has been carried out to investigate the hepato-protective role of MAG, against arsenic (As)-induced oxidative damages in the murine liver. As, a well-known toxic metalloid, is ubiquitously found in nature and has been reported to affect nearly all the organs of the human body via oxidative impairment. Administration of As in the form of sodium arsenite (NaAsO2 ) at a dose of 10 mg/kg body weight for 3 months abruptly increased reactive oxygen species (ROS) level, led to oxidative stress and significantly depleted the first line of antioxidant defense system in the body. Moreover, As caused apoptosis in hepatocytes. Treatment with MAG at a dose of 40 mg/kg for body weight for 30 days simultaneously and separately after NaAsO2 administration decreased the ROS production and attenuated the alterations in the activities of all antioxidant indices. MAG also protected liver against the NaAsO2 -induced apoptosis and disintegrated hepatocytes, thus counteracting with As-induced toxicity. It could significantly inhibit the expression of different proapoptotic caspases and upregulate the expression of survival molecules such as Akt and Nrf2. On inhibiting Akt (by PI3K inhibitor, LY294002) and ERK1/2 (by ERK1/2 inhibitor, PD98059) specifically, caspase 3 got activated abolishing mangiferin's protective role on As-induced hepatotoxicity. So here, we have briefly elucidated the signaling cascades involved in As-induced apoptotic cell death in the liver and also the detailed cellular mechanism by which MAG provides protection to this organ. © 2016 BioFactors, 42(5):515-532, 2016.
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Affiliation(s)
- Sukanya Saha
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | | | | | - Namrata Agarwal
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | - Parames C Sil
- Division of Molecular Medicine, Bose Institute, Kolkata, India.
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17
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Kadirvel R, Sundaram K, Mani S, Samuel S, Elango N, Panneerselvam C. Supplementation of ascorbic acid and α-tocopherol prevents arsenic-induced protein oxidation and DNA damage induced by arsenic in rats. Hum Exp Toxicol 2016; 26:939-46. [DOI: 10.1177/0960327107087909] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Contamination of arsenic in drinking water is associated with several human diseases including cancer. It has been reported that oxidative stress plays a vital role in arsenic-induced biochemical and molecular alterations. The aim of the present study was to improve the understanding of arsenic-induced oxidative damage to proteins and to DNA and the role of antioxidants such as ascorbic acid and α-tocopherol in alleviating arsenic-induced damages in experimental rats. A significant increase in the levels of protein oxidation, DNA strand breaks, and DNA–protein cross-links was observed in blood, liver, and kidney of rats exposed to arsenic (100 ppm in drinking water) for 30 days. Co-administration of ascorbic acid and α-tocopherol to arsenic-exposed rats showed a substantial reduction in the levels of arsenic-induced oxidative products of protein and DNA. The results of this study support that free radical–mediated toxic manifestations of arsenic and also suggest that ascorbic acid and α-tocopherol supplementation can improve the arsenic-induced molecular alterations.
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Affiliation(s)
- R Kadirvel
- Department of Medical Biochemistry, Dr. AL Mudhaliar PG Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai 600 113, India; Department of Radiology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | - K Sundaram
- Department of Medical Biochemistry, Dr. AL Mudhaliar PG Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai 600 113, India; Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - S Mani
- Department of Medical Biochemistry, Dr. AL Mudhaliar PG Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai 600 113, India; Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - S Samuel
- Department of Medical Biochemistry, Dr. AL Mudhaliar PG Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai 600 113, India
| | - N Elango
- Department of Medical Biochemistry, Dr. AL Mudhaliar PG Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai 600 113, India
| | - C Panneerselvam
- Department of Medical Biochemistry, Dr. AL Mudhaliar PG Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai 600 113, India
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18
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LincRNAs and base modifications of p53 induced by arsenic methylation in workers. Chem Biol Interact 2016; 246:1-10. [DOI: 10.1016/j.cbi.2016.01.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 12/30/2015] [Accepted: 01/02/2016] [Indexed: 11/30/2022]
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19
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Huang CY, Pu YS, Shiue HS, Chen WJ, Lin YC, Hsueh YM. Polymorphisms of human 8-oxoguanine DNA glycosylase 1 and 8-hydroxydeoxyguanosine increase susceptibility to arsenic methylation capacity-related urothelial carcinoma. Arch Toxicol 2015; 90:1917-27. [PMID: 26359225 DOI: 10.1007/s00204-015-1590-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 08/31/2015] [Indexed: 01/15/2023]
Abstract
Arsenic causes oxidative stress in cultured animal and human cells, and it is a well-documented human carcinogen. We conducted a hospital-based case-control study including 167 cases of urothelial carcinoma (UC) and 334 age- and gender-matched healthy controls to evaluate the relationships between urinary arsenic profiles, urinary 8-hydroxydeoxyguanosine (8-OHdG) levels, and human 8-oxoguanine DNA glycosylase (hOGG1) genotypes and UC. The urinary arsenic species were analyzed by high-performance liquid chromatography and hydride generator-atomic absorption spectrometry. Genotyping for hOGG1 (Ser326Cys) and hOGG1 (-15C>G) was performed using the Sequenom MassARRAY platform with iPLEX Gold chemistry. Urinary 8-OHdG was measured with high-sensitivity enzyme-linked immunosorbent assay kits. The results indicated that the hOGG1 326 Cys/Cys genotype and the hOGG1 -15C>G G/G genotype were associated with an increased risk of UC (OR [95 % CI] 1.57 [1.04-2.35] and 1.57 [1.04-2.35], respectively). Participants with high urinary total arsenic, regardless of the haplotype of hOGG1 Ser326Cys and the -15C>G polymorphism, had significantly higher urinary 8-OHdG compared to participants with low urinary total arsenic. This is the first study to investigate the joint effects of high urinary total arsenic or inefficient arsenic methylation capacity indices, and the high-risk G-G haplotype of hOGG1 on the risk of UC. The findings are especially meaningful for participants with risk factors such as high urinary total arsenic, inefficient arsenic methylation indices, high urinary 8-OHdG, and the high-risk G-G haplotype of hOGG1 which are all associated with an increased UC risk.
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Affiliation(s)
- Chao-Yuan Huang
- Department of Urology, National Taiwan University Hospital, College of Medicine National Taiwan University, Taipei, Taiwan
| | - Yeong-Shiau Pu
- Department of Urology, National Taiwan University Hospital, College of Medicine National Taiwan University, Taipei, Taiwan
| | - Horng-Sheng Shiue
- Department of Chinese Medicine, Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Wei-Jen Chen
- School of Public Health, College of Public Health and Nutrition, Taipei Medical University, Taipei, Taiwan
| | - Ying-Chin Lin
- Department of Family Medicine, Shung Ho Hospital, Taipei Medical University, Taipei, Taiwan.,Department of Health Examination, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.,Division of Family Medicine, School of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yu-Mei Hsueh
- School of Public Health, College of Public Health and Nutrition, Taipei Medical University, Taipei, Taiwan. .,Department of Public Health, School of Medicine, College of Medicine, Taipei Medical University, No. 250 Wu-Hsing Street, Taipei 110, Taiwan.
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20
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Muthumani M, Prabu SM. Silibinin potentially attenuates arsenic-induced oxidative stress mediated cardiotoxicity and dyslipidemia in rats. Cardiovasc Toxicol 2014; 14:83-97. [PMID: 24062023 DOI: 10.1007/s12012-013-9227-x] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Cardiac dysfunction is one of the major causes of mortality and morbidity throughout the world. Chronic exposure of arsenic (As) mainly leads to cardiotoxic effect. Cardiotoxicity was induced by the sodium arsenite as the source of As (5 mg/kg BW, PO) for 4 weeks. As intoxication significantly (p < 0.05) increased the serum cardiac markers, viz. creatine kinase-MB, lactate dehydrogenase, aspartate transaminase, alanine transaminase and alkaline phosphatase, oxidative stress markers in heart, plasma total cholesterol (TC), triglycerides (TG), phospholipids (PL), free fatty acids (FFA), low density lipoprotein cholesterol, very low density lipoprotein cholesterol as well as cardiac lipid profile (TC, TG and FFA) and significantly (p < 0.05) decreased the level of serum high density lipoprotein cholesterol, cardiac PL, mitochondrial enzymes such as ICDH, SDH, MDH, α-KDH and NADH dehydrogenase, levels of enzymatic antioxidant, nonenzymatic antioxidants and membrane-bound ATPases in heart. In addition, As-intoxicated rats showed a significant (p < 0.05) up-regulation of myocardial NADPH (NOX) oxidase sub units such as NOX2 and NOX4 as well as Keap-1 and down-regulation of Nrf2 and HO-1 protein expressions. Pre-administration of silibinin (SB) (75 mg/kg BW) remarkably recovered all these altered parameters to near normalcy in As-induced cardiotoxic rat. Moreover, the light microscopic and transmission electron microscopic study further supports the protective efficacy of SB on the heart mitochondria. In conclusion, our data demonstrate that SB has a potential to extenuate the arsenic-induced cardiotoxicity and dyslipidemia in rat.
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Affiliation(s)
- M Muthumani
- Department of Zoology, Faculty of Science, Annamalai University, Annamalainagar, 608002, Tamilnadu, India
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21
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Gentry PR, Yager JW, Clewell RA, Clewell HJ. Use of mode of action data to inform a dose-response assessment for bladder cancer following exposure to inorganic arsenic. Toxicol In Vitro 2014; 28:1196-205. [PMID: 24937311 DOI: 10.1016/j.tiv.2014.05.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 05/19/2014] [Accepted: 05/21/2014] [Indexed: 01/15/2023]
Abstract
In the recent National Research Council report on conducting a dose-response assessment for inorganic arsenic, the committee remarked that mode of action data should be used, to the extent possible, to extrapolate below the observed range for epidemiological studies to inform the shape of the dose-response curve. Recent in vitro mode of action studies focused on understanding the development of bladder cancer following exposure to inorganic arsenic provide data to inform the dose-response curve. These in vitro data, combined with results of bladder cancer epidemiology studies, inform the dose-response curve in the low-dose region, and include values for both pharmacokinetic and pharmacodynamic variability. Integration of these data provides evidence of a range of concentrations of arsenic for which no effect on the bladder would be expected. Specifically, integration of these results suggest that arsenic exposures in the range of 7-43 ppb in drinking water are exceedingly unlikely to elicit changes leading to key events in the development of cancer or noncancer effects in bladder tissue. These findings are consistent with the lack of evidence for bladder cancer following chronic ingestion of arsenic water concentrations <100 ppb in epidemiological studies.
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Affiliation(s)
- P R Gentry
- ENVIRON International Corporation, 1900 N. 18th Street, Suite 804, Monroe, LA 71201, United States.
| | - J W Yager
- ENVIRON International Corporation, 2200 Powell Street, Suite 700, Emeryville, CA 94608, United States; University of New Mexico, MSC 10 5550, 1 University of New Mexico, Albuquerque, NM 87131-0001, United States
| | - R A Clewell
- The Hamner Institutes for Health Sciences, 6 Davis Drive, Research Triangle Park, NC 27709-2137, United States
| | - H J Clewell
- The Hamner Institutes for Health Sciences, 6 Davis Drive, Research Triangle Park, NC 27709-2137, United States
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22
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Harper KN, Liu X, Hall MN, Ilievski V, Oka J, Calancie L, Slavkovich V, Levy D, Siddique A, Alam S, Mey JL, van Geen A, Graziano JH, Gamble MV. A dose-response study of arsenic exposure and markers of oxidative damage in Bangladesh. J Occup Environ Med 2014; 56:652-8. [PMID: 24854259 PMCID: PMC4050339 DOI: 10.1097/jom.0000000000000166] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
OBJECTIVE To evaluate the dose-response relationship between arsenic (As) exposure and markers of oxidative damage in Bangladeshi adults. METHODS We recruited 378 participants drinking water from wells assigned to five water As exposure categories; the distribution of subjects was as follows: (1) less than 10 μg/L (n=76); (2) 10 to 100 μg/L (n=104); (3) 101 to 200 μg/L (n=86); (4) 201 to 300 μg/L (n=67); and (5) more than 300 μg/L (n=45). Arsenic concentrations were measured in well water, as well as in urine and blood. Urinary 8-oxo-2'-deoxyguanosine and plasma protein carbonyls were measured to assess oxidative damage. RESULTS None of our measures of As exposure were significantly associated with protein carbonyl or 8-oxo-2'-deoxyguanosine levels. CONCLUSIONS We found no evidence to support a significant relationship between long-term exposure to As-contaminated drinking water and biomarkers of oxidative damage among Bangladeshi adults.
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Affiliation(s)
- Kristin N. Harper
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032
| | - Xinhua Liu
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY 10032
| | - Megan N. Hall
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY 10032
| | - Vesna Ilievski
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032
| | - Julie Oka
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032
| | - Larissa Calancie
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032
| | - Vesna Slavkovich
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032
| | - Diane Levy
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, NY 10032
| | - Abu Siddique
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Shafiul Alam
- Columbia University Arsenic Project in Bangladesh, Dhaka, Bangladesh
| | - Jacob L. Mey
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964
- Kingsbridge Community College, New York, NY 11235
| | - Alexander van Geen
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY 10964
| | - Joseph H. Graziano
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032
| | - Mary V. Gamble
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY 10032
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23
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Normandin L, Ayotte P, Levallois P, Ibanez Y, Courteau M, Kennedy G, Chen L, Le XC, Bouchard M. Biomarkers of arsenic exposure and effects in a Canadian rural population exposed through groundwater consumption. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2014; 24:127-34. [PMID: 24192660 DOI: 10.1038/jes.2013.80] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 10/04/2013] [Indexed: 05/21/2023]
Abstract
Drinking water intake of arsenic (As) from private wells may represent a significant exposure pathway and induce oxidative DNA damage. We measured total As concentrations in hair and nails, and concentrations of the different species of As and its metabolites as well as 8-OHdG in urine of 110 non-smoking adults living in a rural region of the Province of Quebec, Canada. Significant differences in exposure biomarker levels were observed between individuals consuming drinking water with As levels of≤1.0,>1.0 -≤10 and>10 μg/l. Multivariate linear regression analysis also showed a significant relationship between estimated daily drinking water intakes of As and biomarker levels. Conversely, 8-OHdG levels were not significantly related to daily drinking water intakes of As or to hair, nail or urinary exposure biomarker levels, according to multivariate linear regression analysis. Even at the relatively low levels of As found in well water of our participants, water consumption significantly increases their body load of As, as confirmed by multiple matrix measurements, which reflected exposure over different time frames. However, this increased internal As dose was not associated with higher oxidative damage to DNA as reflected by urinary 8-OHdG levels.
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Affiliation(s)
- Louise Normandin
- 1] Institut national de santé publique du Québec (INSPQ), Montreal, Quebec, Canada [2] Department of Environmental and Occupational Health, Chair of Toxicological Risk Assessment and Management and Institut de recherche en santé publique, University of Montreal, Main Station, Montreal, Quebec, Canada
| | - Pierre Ayotte
- Axe Santé publique et pratiques optimales en santé, Centre de recherche du CHU Québec/INSPQ, Wolfe, Quebec, Canada
| | - Patrick Levallois
- Axe Santé publique et pratiques optimales en santé, Centre de recherche du CHU Québec/INSPQ, Wolfe, Quebec, Canada
| | - Yves Ibanez
- Department of Environmental and Occupational Health, Chair of Toxicological Risk Assessment and Management and Institut de recherche en santé publique, University of Montreal, Main Station, Montreal, Quebec, Canada
| | - Marilène Courteau
- Axe Santé publique et pratiques optimales en santé, Centre de recherche du CHU Québec/INSPQ, Wolfe, Quebec, Canada
| | - Greg Kennedy
- Department of Engineering Physics, École Polytechnique de Montréal, Montréal, Québec, Canada
| | - Lydia Chen
- Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - X Chris Le
- Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
| | - Michèle Bouchard
- Department of Environmental and Occupational Health, Chair of Toxicological Risk Assessment and Management and Institut de recherche en santé publique, University of Montreal, Main Station, Montreal, Quebec, Canada
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24
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Sorrentino JA, Krishnamurthy J, Tilley S, Alb JG, Burd CE, Sharpless NE. p16INK4a reporter mice reveal age-promoting effects of environmental toxicants. J Clin Invest 2014; 124:169-73. [PMID: 24334456 PMCID: PMC3871242 DOI: 10.1172/jci70960] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 10/07/2013] [Indexed: 01/16/2023] Open
Abstract
While murine-based systems to identify cancer-promoting agents (carcinogens) are established, models to identify compounds that promote aging (gerontogens) have not been described. For this purpose, we exploited the transcription of p16INK4a, which rises dynamically with aging and correlates with age-associated disease. Activation of p16INK4a was visualized in vivo using a murine strain that harbors a knockin of the luciferase gene into the Cdkn2a locus (p16LUC mice). We exposed p16LUC mice to candidate gerontogens, including arsenic, high-fat diet, UV light, and cigarette smoke and serially imaged animals to monitor senescence induction. We show that exposure to a high-fat diet did not accelerate p16INK4a expression, whereas arsenic modestly augmented, and cigarette smoke and UV light potently augmented, activation of p16INK4a-mediated senescence. This work provides a toxicological platform to study mammalian aging and suggests agents that directly damage DNA promote molecular aging.
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Affiliation(s)
- Jessica A. Sorrentino
- The Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
The Lineberger Comprehensive Cancer Center,
Department of Genetics, and
Department of Pulmonary Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Departments of Molecular Genetics and Molecular and Cellular Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - Janakiraman Krishnamurthy
- The Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
The Lineberger Comprehensive Cancer Center,
Department of Genetics, and
Department of Pulmonary Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Departments of Molecular Genetics and Molecular and Cellular Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - Stephen Tilley
- The Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
The Lineberger Comprehensive Cancer Center,
Department of Genetics, and
Department of Pulmonary Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Departments of Molecular Genetics and Molecular and Cellular Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - James G. Alb
- The Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
The Lineberger Comprehensive Cancer Center,
Department of Genetics, and
Department of Pulmonary Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Departments of Molecular Genetics and Molecular and Cellular Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - Christin E. Burd
- The Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
The Lineberger Comprehensive Cancer Center,
Department of Genetics, and
Department of Pulmonary Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Departments of Molecular Genetics and Molecular and Cellular Biochemistry, The Ohio State University, Columbus, Ohio, USA
| | - Norman E. Sharpless
- The Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
The Lineberger Comprehensive Cancer Center,
Department of Genetics, and
Department of Pulmonary Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA.
Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Departments of Molecular Genetics and Molecular and Cellular Biochemistry, The Ohio State University, Columbus, Ohio, USA
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25
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Ogg1 genetic background determines the genotoxic potential of environmentally relevant arsenic exposures. Arch Toxicol 2013; 88:585-96. [PMID: 24190502 DOI: 10.1007/s00204-013-1151-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 10/22/2013] [Indexed: 10/26/2022]
Abstract
Inorganic arsenic (i-As) is a well-established human carcinogen to which millions of people are exposed worldwide. It is generally accepted that the genotoxic effects of i-As after an acute exposure are partially linked to the i-As-induced production of reactive oxygen species, but it is necessary to better determine whether chronic sub-toxic i-As doses are able to induce biologically significant levels of oxidative DNA damage (ODD). To fill in this gap, we have tested the genotoxic and oxidative effects of environmentally relevant arsenic exposures using mouse embryonic fibroblast MEF mutant Ogg1 cells and their wild-type counterparts. Effects were examined by using the comet assay complemented with the use of FPG enzyme. Our findings indicate that MEF Ogg1-/- cells are more sensitive to arsenite-induced acute toxicity, genotoxicity and ODD. Long-term exposure to sub-toxic doses of arsenite generates a detectable increase in ODD and genotoxic DNA damage only in MEF Ogg1-deficient cells. Altogether, the data presented here point out the relevance of ODD and Ogg1 genetic background on the genotoxic risk of i-As at environmentally plausible doses. The persistent accumulation of DNA 8-OH-dG lesions in Ogg1-/- cells during the complete course of the exposure suggests a relevant role in arsenic-associated carcinogenic risk in turn.
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26
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Rashid K, Sinha K, Sil PC. An update on oxidative stress-mediated organ pathophysiology. Food Chem Toxicol 2013; 62:584-600. [PMID: 24084033 DOI: 10.1016/j.fct.2013.09.026] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 08/29/2013] [Accepted: 09/19/2013] [Indexed: 12/29/2022]
Abstract
Exposure to environmental pollutants and drugs can result in pathophysiological situations in the body. Research in this area is essential as the knowledge on cellular survival and death would help in designing effective therapeutic strategies that are needed for the maintenance of the normal physiological functions of the body. In this regard, naturally occurring bio-molecules can be considered as potential therapeutic targets as they are normally available in commonly consumed foodstuffs and are thought to have minimum side effects. This review article describes the detailed mechanisms of oxidative stress-mediated organ pathophysiology and the ultimate fate of the cells either to survive or to undergo necrotic or apoptotic death. The mechanisms underlying the beneficial role of a number of naturally occurring bioactive molecules in oxidative stress-mediated organ pathophysiology have also been included in the review. The review provides useful information about the recent progress in understanding the mechanism(s) of various types of organ pathophysiology, the complex cross-talk between these pathways, as well as their modulation in stressed conditions. Additionally, it suggests possible therapeutic applications of a number of naturally occurring bioactive molecules in conditions involving oxidative stress.
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Affiliation(s)
- Kahkashan Rashid
- Division of Molecular Medicine, Bose Institute, P-1/12, CIT Scheme VII M, Calcutta 700054, West Bengal, India
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27
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Argos M, Rahman M, Parvez F, Dignam J, Islam T, Quasem I, K Hore S, T Haider A, Hossain Z, I Patwary T, Rakibuz-Zaman M, Sarwar G, La Porte P, Harjes J, Anton K, Kibriya MG, Jasmine F, Khan R, Kamal M, Shea CR, Yunus M, Baron JA, Ahsan H. Baseline comorbidities in a skin cancer prevention trial in Bangladesh. Eur J Clin Invest 2013; 43:579-88. [PMID: 23590571 PMCID: PMC3953314 DOI: 10.1111/eci.12085] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Accepted: 03/09/2013] [Indexed: 01/02/2023]
Abstract
BACKGROUND Epidemiologic research suggests that increased cancer risk due to chronic arsenic exposure persists for several decades even after the exposure has terminated. Observational studies suggest that antioxidants exert a protective effect on arsenical skin lesions and cancers among those chronically exposed to arsenic through drinking water. This study reports on the design, methods and baseline analyses from the Bangladesh Vitamin E and Selenium Trial (BEST), a population-based chemoprevention study conducted among adults in Bangladesh with visible arsenic toxicity. MATERIALS AND METHODS Bangladesh Vitamin E and Selenium Trial is a 2 × 2 full factorial, double-blind, randomized controlled trial of 7000 adults having manifest arsenical skin lesions evaluating the efficacy of 6-year supplementation with alpha-tocopherol (100 mg daily) and L-selenomethionine (200 μg daily) for the prevention of nonmelanoma skin cancer. RESULTS In cross-sectional analyses, we observed significant associations of skin lesion severity with male gender (female prevalence odds ratio (POR) = 0.87; 95% CI = 0.79-0.96), older age (aged 36-45 years, POR = 1.27; 95% CI = 1.13-1.42; aged 46-55 years, POR = 1.44; 95% CI = 1.27-1.64 and aged 56-65 years, POR = 1.50; 95% CI = 1.26-1.78 compared with aged 25-35 years), hypertension (POR = 1.29; 95% CI = 1.08-1.55), diabetes (POR = 2.13; 95% CI = 1.32-3.46), asthma (POR = 1.55; 95% CI = 1.03-2.32) and peptic ulcer disease (POR = 1.20; 95% CI = 1.07-1.35). CONCLUSIONS We report novel associations between arsenical skin lesions with several common chronic diseases. With the rapidly increasing burden of preventable cancers in developing countries, efficient and feasible chemoprevention study designs and approaches, such as employed in BEST, may prove both timely and potentially beneficial in conceiving cancer chemoprevention trials in Bangladesh and beyond.
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Affiliation(s)
- Maria Argos
- Department of Health Studies, The University of Chicago, Chicago, IL 60637, USA
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28
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Das J, Roy A, Sil PC. Mechanism of the protective action of taurine in toxin and drug induced organ pathophysiology and diabetic complications: a review. Food Funct 2013; 3:1251-64. [PMID: 22930035 DOI: 10.1039/c2fo30117b] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Taurine (2-aminoethanesulfonic acid), a conditionally essential amino acid, is found in large concentrations in all mammalian tissues and is particularly abundant in aquatic foods. Taurine exhibits membrane stabilizing, osmoregulatory and cytoprotective effects, antioxidative properties, regulates intracellular Ca(2+) concentration, modulates ion movement and neurotransmitters, reduce the levels of pro-inflammatory cytokines in various organs and controls blood pressure. Recently, emerging evidence from the literature shows the effectiveness of taurine as a protective agent against several environmental toxins and drug-induced multiple organ injuries as the outcome of hepatotoxicity, nephrotoxicity, neurotoxicity, testicular toxicity and cardiotoxicity in several animal models. Besides, taurine is also effective in combating diabetes and its associated complications, including cardiomyopathy, nephropathy, neuropathy, retinopathy and atherosclerosis. These beneficial effects appear to be due to the multiple actions of taurine on cellular functions. This review summarizes the mechanism of the prophylactic role of taurine against several environmental toxins and drug-induced organ pathophysiology and diabetes.
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Affiliation(s)
- Joydeep Das
- Division of Molecular Medicine, Bose Institute, P-1/12, CIT Scheme VII M, Kolkata-700054, India
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29
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Vélez-Alavez M, Labrada-Martagón V, Méndez-Rodriguez LC, Galván-Magaña F, Zenteno-Savín T. Oxidative stress indicators and trace element concentrations in tissues of mako shark (Isurus oxyrinchus). Comp Biochem Physiol A Mol Integr Physiol 2013; 165:508-14. [PMID: 23500624 DOI: 10.1016/j.cbpa.2013.03.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 02/28/2013] [Accepted: 03/03/2013] [Indexed: 12/20/2022]
Abstract
Liver, kidney and muscle from juvenile mako sharks (Isurus oxyrinchus) were collected in Baja California Sur. Lead (Pb), cadmium (Cd), mercury (Hg) and arsenic (As) concentrations were determined by atomic absorption spectrophotometry. The production of superoxide radical (O2(•-)) was measured as an indicator of reactive oxygen species production; lipid peroxidation (TBARS) and protein carbonyl levels were quantified as indicators of oxidative damage, and the activity of the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR) and glutathione-S-transferase (GST) was assessed as indicator of antioxidant defenses. Two discriminant functions separated muscle from liver and kidney samples. Cd concentration was lower in muscle than in kidney (p<0.05) and Hg concentration was higher in muscle than in liver and kidney (p<0.05). Although GR and SOD activities were higher, oxidative damage (TBARS and carbonyl protein levels) was also higher in kidney (p<0.05). SOD activity, TBARS levels, and Cd and Hg concentration were the set of predictors with significant relevance during tissue discrimination. Tissue metabolism, physiology of the organisms and environmental factors may be related to the differences in trace elements and oxidative stress indicators found in muscle, liver and kidney of the mako shark.
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Affiliation(s)
- Marcela Vélez-Alavez
- Centro de Investigaciones Biológicas del Noroeste, S.C. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, Baja California Sur, C.P. 23096, México.
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30
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B SP, Vidyullatha P, Vani GT, Devi RPV, Rani UP, Reddy PP, Prasad HM. Association of gene polymorphism in detoxification enzymes and urinary 8-OHdG levels in traffic policemen exposed to vehicular exhaust. Inhal Toxicol 2013; 25:1-8. [DOI: 10.3109/08958378.2012.745634] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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31
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Pei Q, Ma N, Zhang J, Xu W, Li Y, Ma Z, Li Y, Tian F, Zhang W, Mu J, Li Y, Wang D, Liu H, Yang M, Ma C, Yun F. Oxidative DNA damage of peripheral blood polymorphonuclear leukocytes, selectively induced by chronic arsenic exposure, is associated with extent of arsenic-related skin lesions. Toxicol Appl Pharmacol 2013; 266:143-9. [DOI: 10.1016/j.taap.2012.10.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 10/27/2012] [Accepted: 10/30/2012] [Indexed: 10/27/2022]
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32
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Seow WJ, Pan WC, Kile ML, Baccarelli AA, Quamruzzaman Q, Rahman M, Mahiuddin G, Mostofa G, Lin X, Christiani DC. Arsenic reduction in drinking water and improvement in skin lesions: a follow-up study in Bangladesh. ENVIRONMENTAL HEALTH PERSPECTIVES 2012; 120:1733-8. [PMID: 23060367 PMCID: PMC3548283 DOI: 10.1289/ehp.1205381] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 10/10/2012] [Indexed: 05/21/2023]
Abstract
BACKGROUND Chronic exposure to arsenic is associated with skin lesions. However, it is not known whether reducing arsenic exposure will improve skin lesions. OBJECTIVE We evaluated the association between reduced arsenic exposures and skin lesion recovery over time. METHODS A follow-up study of 550 individuals was conducted in 2009-2011 on a baseline population of skin lesion cases (n = 900) previously enrolled in Bangladesh in 2001-2003. Arsenic in drinking water and toenails, and skin lesion status and severity were ascertained at baseline and follow-up. We used logistic regression and generalized estimating equation (GEE) models to evaluate the association between log10-transformed arsenic exposure and skin lesion persistence and severity. RESULTS During the study period, water arsenic concentrations decreased in this population by 41% overall, and 65 individuals who had skin lesions at baseline had no identifiable lesions at follow-up. In the adjusted models, every log10 decrease in water arsenic and toenail arsenic was associated with 22% [odds ratio (OR) = 1.22; 95% CI: 0.85, 1.78] and 4.5 times (OR = 4.49; 95% CI: 1.94, 11.1) relative increase in skin lesion recovery, respectively. In addition, lower baseline arsenic levels were significantly associated with increased odds of recovery. A log10 decrease in toenail arsenic from baseline to follow-up was also significantly associated with reduced skin lesion severity in cases over time (mean score change of -5.22 units; 95% CI: -8.61, -1.82). CONCLUSIONS Reducing arsenic exposure increased the odds that an individual with skin lesions would recover or show less severe lesions within 10 years. Reducing arsenic exposure must remain a public health priority in Bangladesh and in other regions affected by arsenic-contaminated water.
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Affiliation(s)
- Wei Jie Seow
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts 02115, USA
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33
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Wen J, Wen W, Li L, Liu H. Methylation capacity of arsenic and skin lesions in smelter plant workers. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2012; 34:624-630. [PMID: 22885843 DOI: 10.1016/j.etap.2012.07.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 07/02/2012] [Accepted: 07/06/2012] [Indexed: 06/01/2023]
Abstract
Potential occupational arsenic exposure is a significant problem in smelting plants. The metabolites containing arsenic with an oxidation of +3 have been considered more cytotoxic and genotoxic than their parent inorganic species. The current study examined the capacity of arsenic methylation and its risk on skin lesions. The primary aim of this study is to determine if methylation capacity, as measured by urinary arsenic metabolites, differed in workers with skin lesions compared to workers without skin lesions. Hydride generation-atomic absorption spectrometry was used to determine three arsenic species in urine of workers who had been working in arsenic plants, and primary and secondary methylation indexes were calculated. Skin lesions were examined at the same time. Many workers had obvious skin lesions (36/91). The mean concentrations of inorganic arsenic (iAs), monomethylarsonic acid (MMA) and dimethylarsinic acid (DMA) in urine of workers are obviously higher than those of the control group. There are more iAs, MMA, and DMA in urine, higher MMA%, lower iAs% for workers with skin lesions compared with those without skin lesions. Workers with skin lesions have the lowest SMI (3.50±1.21), and they may be in danger. Our results support the viewpoint that individuals who metabolize inorganic arsenic to MMA easily, but metabolize MMA to DMA difficulty have more risk of skin lesions.
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Affiliation(s)
- Jinghua Wen
- Guizhou University of Finance and Economics, No. 276, Chongguan Road, Guiyang, Guizhou 550004, People's Republic of China
| | - Weihua Wen
- Department of Occupational Health, Yunnan Provincial Center for Disease Control and Prevention, No. 158, Dongsi Street, Kunming, Yunnan 650022, People's Republic of China.
| | - Liang Li
- Honghe Zhou Center for Disease Control and Prevention, No. 1, Guannan Road, Mengzi City, Yunnan 661100, People's Republic of China
| | - Hua Liu
- The First Affiliated Hospital of Kunming Medical College, No. 295, Xichang Road, Kunming, Yunnan 650032, People's Republic of China
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Delineating the degree of association between biomarkers of arsenic exposure and type-2 diabetes mellitus. Int J Hyg Environ Health 2012; 216:35-49. [PMID: 22920650 DOI: 10.1016/j.ijheh.2012.07.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 07/01/2012] [Accepted: 07/04/2012] [Indexed: 01/18/2023]
Abstract
Non-carcinogenic effects in low-level (< 100 μgL(-1)) arsenic (As)-impacted populations, such as the development and progression of type-2 diabetes mellitus (T2DM), are often neglected given the primary emphasis of public health authorities on As carcinogenicity. We gathered studies reporting urinary biomarkers of As exposure (U-As) and biomarkers associated with T2DM and its complications (U-T2DM), such as renal damage, oxidation stress, low-grade inflammation, and endothelial damage. Studied U-T2DM biomarkers were: 8-hydroxy-2'deoxyguanosine, N-acetyl-β-d-glucosaminidase, β2-microglobulin, and albumin. Data was expressed as: either arithmetic means and standard deviations, or geometric means and geometric standard deviations, or correlation coefficients of U-As and U-T2DM. Urinary As concentrations were consistently associated with the aforementioned biomarkers of T2DM pathologic complications. Despite the limited selectivity of the selected T2DM biomarkers, a per unit change in As exposure level was reflected in the corresponding T2DM biomarker urinary concentrations. Our systematic review provides new evidence on the role of environmental As exposures influencing the T2DM disease process. Additional epidemiologic studies onto the association between As and T2DM should incorporate both urinary As and T2DM biomarkers, as suggested in this study, in order to evaluate subclinical effects of low-level As exposures.
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35
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Lin TS, Wu CC, Wu JD, Wei CH. Oxidative DNA damage estimated by urinary 8-hydroxy-2'-deoxyguanosine and arsenic in glass production workers. Toxicol Ind Health 2011; 28:513-21. [PMID: 22033425 DOI: 10.1177/0748233711416945] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A total of 130 male glass workers, including 33 administrative workers, 18 batch house workers, 42 craftsmen, and 37 melting process workers, were recruited to investigate the potential DNA damage resulting from toxic element exposure. The occupational exposure to trace elements, including arsenic (As), cadmium (Cd), manganese (Mn), nickel (Ni), lead (Pb), and selenium (Se), was estimated by their urinary levels as internal doses. In addition, all participants filled a self-filled questionnaire indicating their individual information. The average levels of urinary As, Cd, Mn, Ni, Pb, Se, and 8-hydroxy-2'-deoxyguanosine (8-OHdG) were 282.3 ± 464.6, 3.07 ± 5.39, 3.81 ± 11.43, 81.48 ± 138.9, 18.23 ± 49.61, 165.2 ± 224.9, and 17.21 ± 26.34 μg/g creatinine, respectively. The urinary levels of 8-OHdG and toxic elements were strongly associated with the work nature of the worker, with an exception of Mn and Pb. In contrast, the levels of toxic element were not influenced by age, smoking behavior, and alcohol consumption. The urinary 8-OHdG was found significantly higher in higher internal exposure groups of As, Cd, Ni, and Se. However, the stepwise multiple regression models showed that urinary 8-OHdG was only associated with urinary As and heat stress but inversely with age.
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Affiliation(s)
- Tser-Sheng Lin
- Department of Safety, Health, and Environmental Engineering, National United University, Miaoli, Taiwan.
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36
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Takahashi N, Yoshida T, Ohnuma A, Horiuchi H, Ishitsuka K, Kashimoto Y, Kuwahara M, Nakashima N, Harada T. The Enhancing Effect of the Antioxidant N-Acetylcysteine on Urinary Bladder Injury Induced by Dimethylarsinic Acid. Toxicol Pathol 2011; 39:1107-14. [DOI: 10.1177/0192623311422076] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
| | | | - Aya Ohnuma
- The Institute of Environmental Toxicology, Ibaraki, Japan
| | | | | | | | - Maki Kuwahara
- The Institute of Environmental Toxicology, Ibaraki, Japan
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Sun Y, Kojima C, Chignell C, Mason R, Waalkes MP. Arsenic transformation predisposes human skin keratinocytes to UV-induced DNA damage yet enhances their survival apparently by diminishing oxidant response. Toxicol Appl Pharmacol 2011; 255:242-50. [PMID: 21820459 PMCID: PMC3169845 DOI: 10.1016/j.taap.2011.07.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 07/07/2011] [Accepted: 07/12/2011] [Indexed: 02/06/2023]
Abstract
Inorganic arsenic and UV, both human skin carcinogens, may act together as skin co-carcinogens. We find human skin keratinocytes (HaCaT cells) are malignantly transformed by low-level arsenite (100nM, 30weeks; termed As-TM cells) and with transformation concurrently undergo full adaptation to arsenic toxicity involving reduced apoptosis and oxidative stress response to high arsenite concentrations. Oxidative DNA damage (ODD) is a possible mechanism in arsenic carcinogenesis and a hallmark of UV-induced skin cancer. In the current work, inorganic arsenite exposure (100nM) did not induce ODD during the 30weeks required for malignant transformation. Although acute UV-treatment (UVA, 25J/cm(2)) increased ODD in passage-matched control cells, once transformed by arsenic to As-TM cells, acute UV actually further increased ODD (>50%). Despite enhanced ODD, As-TM cells were resistant to UV-induced apoptosis. The response of apoptotic factors and oxidative stress genes was strongly mitigated in As-TM cells after UV exposure including increased Bcl2/Bax ratio and reduced Caspase-3, Nrf2, and Keap1 expression. Several Nrf2-related genes (HO-1, GCLs, SOD) showed diminished responses in As-TM cells after UV exposure consistent with reduced oxidant stress response. UV-exposed As-TM cells showed increased expression of cyclin D1 (proliferation gene) and decreased p16 (tumor suppressor). UV exposure enhanced the malignant phenotype of As-TM cells. Thus, the co-carcinogenicity between UV and arsenic in skin cancer might involve adaptation to chronic arsenic exposure generally mitigating the oxidative stress response, allowing apoptotic by-pass after UV and enhanced cell survival even in the face of increased UV-induced oxidative stress and increased ODD.
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Affiliation(s)
- Yang Sun
- Inorganic Carcinogenesis Section, Laboratory of Comparative Carcinogenesis, National Cancer Institute at National Institute of Environmental Health Sciences, and National Toxicology Laboratories, National Toxicology Program, the National Institutes of Health, Research Triangle Park, North Carolina 27709, USA
| | - Chikara Kojima
- Inorganic Carcinogenesis Section, Laboratory of Comparative Carcinogenesis, National Cancer Institute at National Institute of Environmental Health Sciences, and National Toxicology Laboratories, National Toxicology Program, the National Institutes of Health, Research Triangle Park, North Carolina 27709, USA
| | - Colin Chignell
- Laboratory of Toxicology and Pharmacology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709, USA
| | - Ronald Mason
- Laboratory of Toxicology and Pharmacology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709, USA
| | - Michael P. Waalkes
- Inorganic Carcinogenesis Section, Laboratory of Comparative Carcinogenesis, National Cancer Institute at National Institute of Environmental Health Sciences, and National Toxicology Laboratories, National Toxicology Program, the National Institutes of Health, Research Triangle Park, North Carolina 27709, USA
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Kim Y, Lee BK. Association between urinary arsenic and diabetes mellitus in the Korean general population according to KNHANES 2008. THE SCIENCE OF THE TOTAL ENVIRONMENT 2011; 409:4054-4062. [PMID: 21723589 DOI: 10.1016/j.scitotenv.2011.06.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 05/31/2011] [Accepted: 06/01/2011] [Indexed: 05/31/2023]
Abstract
INTRODUCTION We present data from the Korean National Health and Nutrition Examination Survey (KNHANES) 2008 on the associations between urinary arsenic and diabetes mellitus in a representative sample of the adult Korean population. METHODS This study was based on data obtained in KNHANES 2008, which was conducted for three years (2007-2009) using a rolling sampling design involving a complex, stratified, multistage, probability-cluster survey of a representative sample of the noninstitutionalized civilian population of South Korea. RESULTS Geometric means of total urinary arsenic concentration in females and total participants with diabetes mellitus were significantly higher than in participants without diabetes mellitus after adjustment for covariates, including age, seafood consumption, body mass index (BMI), hypertension, area of residence, regional area, education level, and smoking and drinking status. Multiple regression analysis after similar adjustment showed that total urinary arsenic concentration was associated with diabetes status in the females and total participants. In addition, after similar adjustment, the odds ratios (ORs) for diabetes mellitus in female participants and all participants were 1.502 (95% CI, 1.038-2.171) and 1.312 (95% CI, 1.040-1.655), respectively, for doubling of the level of urinary total arsenic concentration. CONCLUSION This study showed an association between total urinary arsenic concentration and the prevalence of diabetes mellitus in a representative sample of the adult population, especially women, with environmental arsenic exposure after adjustment for seafood intake and relevant diabetes risk factors.
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Affiliation(s)
- Yangho Kim
- Department of Occupational and Environmental Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Republic of Korea
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39
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Wen W, Wen J, Lu L, Liu H, Yang J, Cheng H, Che W, Li L, Zhang G. Metabolites of arsenic and increased DNA damage of p53 gene in arsenic plant workers. Toxicol Appl Pharmacol 2011; 254:41-7. [DOI: 10.1016/j.taap.2011.04.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 04/18/2011] [Accepted: 04/21/2011] [Indexed: 10/18/2022]
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Pal PB, Pal S, Das J, Sil PC. Modulation of mercury-induced mitochondria-dependent apoptosis by glycine in hepatocytes. Amino Acids 2011; 42:1669-83. [PMID: 21373768 DOI: 10.1007/s00726-011-0869-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Accepted: 02/18/2011] [Indexed: 12/16/2022]
Abstract
Mercury (Hg) is one of the universal environmental pollutants and is responsible for various organ pathophysiology including oxidative stress-induced hepatic disorders. In the present study, we aimed to explore the protective role of glycine in Hg-induced cytotoxicity and cell death in murine hepatocytes. Exposure of mercury (20 μM), in the form HgCl2 for 1 h, significantly enhanced the ALT and ALP leakage, increased reactive oxygen species production, reduced cell viability and distorted the antioxidant status of hepatocytes. Flow cytometric analyses shows that Hg-induced apoptotic death in hepatocytes. Mechanism of this pathophysiology involves reduced mitochondrial membrane potential, variations in Bcl-2/Bad proteins, activation of caspases and cleavage of PARP protein. In addition, Hg distinctly increased NF-κB phosphorylation in association with IKKα phosphorylation and IκBα degradation. Concurrent treatment with glycine (45 mM), however, reduced Hg-induced oxidative stress, attenuated the changes in NF-κB phosphorylation and protects hepatocytes from Hg-induced apoptotic death. Hg also distinctly increased the phosphorylation of p38, JNK and ERK mitogen-activated protein kinase (MAPKs). Glycine treatment suppressed these apoptotic events, signifying its protective role in Hg-induced hepatocyte apoptosis as referred by reduction of p38, JNK and ERK MAPK signaling pathways. Results suggest that glycine can modulate Hg-induced oxidative stress and apoptosis in hepatocytes probably because of its antioxidant activity and functioning via mitochondria-dependent pathways and could be a beneficial agent in oxidative stress-mediated liver diseases.
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Affiliation(s)
- Pabitra Bikash Pal
- Division of Molecular Medicine, Bose Institute, P-1/12, CIT Scheme VII M, Kolkata, 700054, West Bengal, India
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Chavan H, Oruganti M, Krishnamurthy P. The ATP-binding cassette transporter ABCB6 is induced by arsenic and protects against arsenic cytotoxicity. Toxicol Sci 2011; 120:519-28. [PMID: 21266531 DOI: 10.1093/toxsci/kfr008] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Arsenic, an environmental carcinogen, remains a major public health problem. Arsenic damages biological systems through multiple mechanisms, including the generation of reactive oxygen species. ABCB6 is an ATP-binding cassette transporter that is highly expressed in cells resistant to arsenic. We have recently demonstrated that ABCB6 expression protects against cellular stressors. In the present study, we evaluated the significance of ABCB6 expression to arsenic toxicity both in mice and in cell culture. We show that sodium arsenite induces ABCB6 expression in a dose-dependent manner both in mice fed sodium arsenite in drinking water and in cells exposed to sodium arsenite in vitro. Arsenite-induced ABCB6 expression was transcriptionally regulated, but this induction was not mediated by the redox-sensitive transcription factor nuclear factor-erythroid 2-related factor 2 (Nrf2). We demonstrate that, in HepG2 and Hep3B cells, knockdown of ABCB6 expression using ABCB6-specific small interfering RNA sensitized the cells to arsenite toxicity. In contrast, stable overexpression of ABCB6 conferred a strong survival advantage toward arsenite-induced oxidative stress. Collectively, these results, obtained by both loss of function and gain of function analysis, suggest that ABCB6 expression in response to sodium arsenite might be an endogenous protective mechanism activated to protect cells against arsenite-induced oxidative stress.
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Affiliation(s)
- Hemantkumar Chavan
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas 66160, USA
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Zhao R, Hou Y, Xue P, Woods CG, Fu J, Feng B, Guan D, Sun G, Chan JY, Waalkes MP, Andersen ME, Pi J. Long isoforms of NRF1 contribute to arsenic-induced antioxidant response in human keratinocytes. ENVIRONMENTAL HEALTH PERSPECTIVES 2011; 119:56-62. [PMID: 20805060 PMCID: PMC3018500 DOI: 10.1289/ehp.1002304] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Accepted: 08/30/2010] [Indexed: 05/10/2023]
Abstract
BACKGROUND Human exposure to inorganic arsenic (iAs), a potent oxidative stressor, causes various dermal disorders, including hyperkeratosis and skin cancer. Nuclear factor-erythroid 2-related factor 1 (NRF1, also called NFE2L1) plays a critical role in regulating the expression of many antioxidant response element (ARE)-dependent genes. OBJECTIVES We investigated the role of NRF1 in arsenic-induced antioxidant response and cytotoxicity in human keratinocytes. RESULTS In cultured human keratinocyte HaCaT cells, inorganic arsenite (iAs3+) enhanced the protein accumulation of long isoforms (120-140 kDa) of NRF1 in a dose- and time-dependent fashion. These isoforms accumulated mainly in the nuclei of HaCaT cells. Selective deficiency of NRF1 by lentiviral short-hairpin RNAs in HaCaT cells [NRF1-knockdown (KD)] led to decreased expression of γ-glutamate cysteine ligase catalytic subunit (GCLC) and regulatory subunit (GCLM) and a reduced level of intracellular glutathione. In response to acute iAs3+ exposure, induction of some ARE-dependent genes, including NAD(P)H:quinone oxidoreductase 1 (NQO1), GCLC, and GCLM, was significantly attenuated in NRF1-KD cells. However, the iAs3-induced expression of heme oxygenase 1 (HMOX-1) was unaltered by silencing NRF1, suggesting that HMOX-1 is not regulated by NRF1. In addition, the lack of NRF1 in HaCaT cells did not disturb iAs3+-induced NRF2 accumulation but noticeably decreased Kelch-like ECH-associated protein 1 (KEAP1) levels under basal and iAs3+-exposed conditions, suggesting a potential interaction between NRF1 and KEAP1. Consistent with the critical role of NRF1 in the transcriptional regulation of some ARE-bearing genes, knockdown of NRF1 significantly increased iAs3+-induced cytotoxicity and apoptosis. CONCLUSIONS Here, we demonstrate for the first time that long isoforms of NRF1 contribute to arsenic-induced antioxidant response in human keratinocytes and protect the cells from acute arsenic cytotoxicity.
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Affiliation(s)
- Rui Zhao
- School of Forensic Medicine, China Medical University, Shenyang, China
- Hamner Institutes for Health Sciences, Research Triangle Park, North Carolina, USA
| | - Yongyong Hou
- Hamner Institutes for Health Sciences, Research Triangle Park, North Carolina, USA
- School of Public Health and
| | - Peng Xue
- Hamner Institutes for Health Sciences, Research Triangle Park, North Carolina, USA
- School of Public Health and
| | - Courtney G. Woods
- Hamner Institutes for Health Sciences, Research Triangle Park, North Carolina, USA
| | - Jingqi Fu
- Hamner Institutes for Health Sciences, Research Triangle Park, North Carolina, USA
- School of Public Health and
| | - Bo Feng
- First Clinical College, China Medical University, Shenyang, China
| | - Dawei Guan
- School of Forensic Medicine, China Medical University, Shenyang, China
| | | | - Jefferson Y. Chan
- Department of Laboratory Medicine and Pathology, University of California–Irvine, Irvine, California, USA
| | - Michael P. Waalkes
- National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA
| | - Melvin E. Andersen
- Hamner Institutes for Health Sciences, Research Triangle Park, North Carolina, USA
| | - Jingbo Pi
- Hamner Institutes for Health Sciences, Research Triangle Park, North Carolina, USA
- Address correspondence to J. Pi, Division of Translational Biology, Hamner Institutes for Health Sciences, 6 Davis Dr., Research Triangle Park, NC 27709 USA. Telephone: (919) 558-1395. Fax: (919) 558-1305. E-mail:
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Saha S, Ghosh M. Ameliorative role of conjugated linolenic acid isomers against oxidative DNA damage induced by sodium arsenite in rat model. Food Chem Toxicol 2010; 48:3398-405. [DOI: 10.1016/j.fct.2010.09.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Revised: 08/13/2010] [Accepted: 09/07/2010] [Indexed: 11/26/2022]
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Das J, Ghosh J, Manna P, Sil PC. Protective role of taurine against arsenic-induced mitochondria-dependent hepatic apoptosis via the inhibition of PKCdelta-JNK pathway. PLoS One 2010; 5:e12602. [PMID: 20830294 PMCID: PMC2935368 DOI: 10.1371/journal.pone.0012602] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Accepted: 08/06/2010] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Oxidative stress-mediated hepatotoxic effect of arsenic (As) is mainly due to the depletion of glutathione (GSH) in liver. Taurine, on the other hand, enhances intracellular production of GSH. Little is known about the mechanism of the beneficial role of taurine in As-induced hepatic pathophysiology. Therefore, in the present study we investigated its beneficial role in As-induced hepatic cell death via mitochondria-mediated pathway. METHODOLOGY/PRINCIPAL FINDINGS Rats were exposed to NaAsO(2) (2 mg/kg body weight for 6 months) and the hepatic tissue was used for oxidative stress measurements. In addition, the pathophysiologic effect of NaAsO(2) (10 microM) on hepatocytes was evaluated by determining cell viability, mitochondrial membrane potential and ROS generation. As caused mitochondrial injury by increased oxidative stress and reciprocal regulation of Bcl-2, Bcl-xL/Bad, Bax, Bim in association with increased level of Apaf-1, activation of caspase 9/3, cleavage of PARP protein and ultimately led to apoptotic cell death. In addition, As markedly increased JNK and p38 phosphorylation with minimal disturbance of ERK. Pre-exposure of hepatocytes to a JNK inhibitor SP600125 prevented As-induced caspase-3 activation, ROS production and loss in cell viability. Pre-exposure of hepatocytes to a p38 inhibitor SB2035, on the other hand, had practically no effect on these events. Besides, As activated PKCdelta and pre-treatment of hepatocytes with its inhibitor, rottlerin, suppressed the activation of JNK indicating that PKCdelta is involved in As-induced JNK activation and mitochondrial dependent apoptosis. Oral administration of taurine (50 mg/kg body weight for 2 weeks) both pre and post to NaAsO(2) exposure or incubation of the hepatocytes with taurine (25 mM) were found to be effective in counteracting As-induced oxidative stress and apoptosis. CONCLUSIONS/SIGNIFICANCE Results indicate that taurine treatment improved As-induced hepatic damages by inhibiting PKCdelta-JNK signalling pathways. Therefore taurine supplementation could provide a new approach for the reduction of hepatic complication due to arsenic poisoning.
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Affiliation(s)
- Joydeep Das
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | - Jyotirmoy Ghosh
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | - Prasenjit Manna
- Division of Molecular Medicine, Bose Institute, Kolkata, India
| | - Parames C. Sil
- Division of Molecular Medicine, Bose Institute, Kolkata, India
- * E-mail:
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Agusa T, Kunito T, Kubota R, Inoue S, Fujihara J, Minh TB, Ha NN, Tu NPC, Trang PTK, Chamnan C, Takeshita H, Iwata H, Tuyen BC, Viet PH, Tana TS, Tanabe S. Exposure, metabolism, and health effects of arsenic in residents from arsenic-contaminated groundwater areas of Vietnam and Cambodia: a review. REVIEWS ON ENVIRONMENTAL HEALTH 2010; 25:193-220. [PMID: 21038756 DOI: 10.1515/reveh.2010.25.3.193] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this review, we summarize the current knowledge on exposure, metabolism, and health effects of arsenic (As) in residents from As-contaminated groundwater areas of Vietnam and Cambodia based on our findings from 2000 and other studies. The health effects of As in humans include severe gastrointestinal disorders, hepatic and renal failure, cardiovascular disturbances, skin pigmentation, hyperkeratosis, and cancers in the lung, bladder, liver, kidney, and skin. Arsenic contamination in groundwater is widely present at Vietnam and Cambodia and the highest As levels are frequently found in groundwater from Cambodia. Sand filter system can reduce As concentration in raw groundwater. The results of hair and urine analyses indicate that residents from these As-contaminated areas are exposed to As. In general, sex, age, body mass index, and As exposure level are significantly associated with As metabolism. Genetic polymorphisms in arsenic (+III) methyltransferase and glutathione-S-transferase isoforms may be influenced As metabolism and accumulation in a Vietnamese population. It is suggested oxidative DNA damage is caused by exposure to As in groundwater from residents in Cambodia. An epidemiologic study on an association of As exposure with human health effects is required in these areas.
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Affiliation(s)
- Tetsuro Agusa
- Dept of Legal Medicine, Shimane University Faculty of Medicine, Izumo, Japan
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High selenium status in individuals exposed to arsenic through coal-burning in Shaanxi (PR of China) modulates antioxidant enzymes, heme oxygenase-1 and DNA damage. Clin Chim Acta 2010; 411:1312-8. [PMID: 20478284 DOI: 10.1016/j.cca.2010.05.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Revised: 05/10/2010] [Accepted: 05/10/2010] [Indexed: 12/26/2022]
Abstract
BACKGROUND Although interactions of arsenite and selenite in mammalian organisms have been suggested by literature data, the antioxidant effects and biochemical mechanisms of dietary selenium on human populations exposed to inorganic arsenic are not fully understood. METHODS Total blood, urine and hair concentrations of arsenic and selenium were determined in all individuals by hydride generation atomic fluorescence spectrometry. The individuals with skin lesions were subsequently classified as "High As group" and "High Se/As group" and controls were classified as "High Se group" and "Control group" according to their blood selenium concentrations. RESULTS High selenium status was correlated with elevated activities of serum superoxide dismutase, glutathione peroxidase, catalase, and reduced levels of malondialdehyde, and increased RNA and protein expression of heme oxygenase-1 in peripheral blood mononuclear cells (PBMC) of individuals in the high arsenic group. Urinary 8-hydroxy-2'-deoxyguanosine levels were positively associated with blood arsenic, but inversely with blood and hair selenium among individuals with skin lesions, whereas mRNA are protein levels of 8-oxoganine DNA glycosylase 1 in PBMC increased in the "High Se/As group" compared to the "High As group". CONCLUSIONS Inorganic arsenic exposure is associated with oxidative stress, which may be prevented by high selenium status via its antioxidative activity and detoxification effect possibly through the formation of an arsenic and selenium containing metabolite, the seleno-bis(S-glutathionyl) arsinium ion.
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Engström KS, Vahter M, Lindh C, Teichert F, Singh R, Concha G, Nermell B, Farmer PB, Strömberg U, Broberg K. Low 8-oxo-7,8-dihydro-2'-deoxyguanosine levels and influence of genetic background in an Andean population exposed to high levels of arsenic. Mutat Res 2010; 683:98-105. [PMID: 19896490 DOI: 10.1016/j.mrfmmm.2009.10.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2009] [Revised: 09/14/2009] [Accepted: 10/23/2009] [Indexed: 10/20/2022]
Abstract
BACKGROUND Arsenic (As) causes oxidative stress through generation of reactive oxygen species. 8-Oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG), a sensitive marker of oxidative DNA damage, has been associated with As exposure in some studies, but not in others, possibly due to population-specific genetic factors. OBJECTIVES To evaluate the association between As and 8-oxodG in urine in a population with a low urinary monomethylated As (%MMA) and high dimethylated As (%DMA), as well as the genetic impact on (a) 8-oxodG concentrations and (b) the association between As and 8-oxodG. MATERIALS AND METHODS Women (N=108) in the Argentinean Andes were interviewed and urine was analyzed for arsenic metabolites (ICPMS) and 8-oxodG (LC-MS/MS). Twenty-seven polymorphisms in genes related to oxidative stress and one in As(+III)methyltransferase (AS3MT) were studied. RESULTS Median concentration of 8-oxodG was 4.7 nmol/L (adjusted for specific weight; range 1.6-13, corresponding to 1.7 microg/g creatinine, range 0.57-4.8) and of total urinary As metabolites (U-As) 290 microg/L (range 94-720; 380 microg/g creatinine, range 140-1100). Concentrations of 8-oxodG were positively associated with %MMA (strongest association, p=0.013), and weakly associated with U-As (positively) and %DMA (negatively). These associations were strengthened when taking ethnicity into account, possibly reflecting genetic differences in As metabolism and genes regulating oxidative stress and DNA maintenance. A genetic influence on 8-oxodG concentrations was seen for polymorphisms in apurinic/apyrimidinic endonuclease 1 (APEX1), DNA-methyltransferases 1 and 3b (DNMT1, DNMT3B), thioredoxin reductase 1 (TXNRD1) and 2 (TXNRD2) and glutaredoxin (GLRX). CONCLUSION Despite high As exposure, the concentrations of 8-oxodG in this population were low compared with other As-exposed populations studied. The strongest association was found for %MMA, stressing that some inconsistencies between As and 8-oxodG partly depend on population variations in As metabolism. We found evidence of genetic impact on 8-oxodG concentrations.
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Affiliation(s)
- Karin S Engström
- Department of Laboratory Medicine, Lund University Hospital, Lund, Sweden.
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Kojima C, Ramirez DC, Tokar EJ, Himeno S, Drobná Z, Stýblo M, Mason RP, Waalkes MP. Requirement of arsenic biomethylation for oxidative DNA damage. J Natl Cancer Inst 2009; 101:1670-81. [PMID: 19933942 DOI: 10.1093/jnci/djp414] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Inorganic arsenic is an environmental carcinogen that may act through multiple mechanisms including formation of methylated derivatives in vivo. Sodium arsenite (up to 5.0 microM) renders arsenic methylation-competent TRL1215 rat liver epithelial cells tumorigenic in nude mice at 18 weeks of exposure and arsenic methylation-deficient RWPE-1 human prostate epithelial cells tumorigenic at 30 weeks of exposure. We assessed the role of arsenic biomethylation in oxidative DNA damage (ODD) using a recently developed immuno-spin trapping method. METHODS Immuno-spin trapping was used to measure ODD after chronic exposure of cultured TRL1215 vs RWPE-1 cells, or of methylation-competent UROtsa/F35 vs methylation-deficient UROtsa human urothelial cells, to sodium arsenite. Secreted matrix metalloproteinase (MMP)-2 and -9 activity, as analyzed by zymography, cellular invasiveness by using a transwell assay, and colony formation by using soft agar assay were compared in cells exposed to arsenite with and without selenite, an arsenic biomethylation inhibitor, to assess the role of ODD in the transition to an in vitro cancer phenotype. RESULTS Exposure of methylation-competent TRL1215 cells to up to 1.0 microM sodium arsenite was followed by a substantial increase in ODD at 5-18 weeks (eg, at 16 weeks with 1.0 microM arsenite, 1138% of control, 95% confidence interval [CI] = 797% to 1481%), whereas exposure of methylation-deficient RWPE-1 cells to up to 5.0 microM arsenite did not increase ODD for a 30-week period. Inhibition of arsenic biomethylation with sodium selenite abolished arsenic-induced ODD and invasiveness, colony formation, and MMP-2 and -9 hypersecretion in TRL1215 cells. Arsenic induced ODD in methylation-competent UROtsa/F35 cells (eg, at 16 weeks, with 1.0 microM arsenite 225% of control, 95% CI = 188% to 262%) but not in arsenic methylation-deficient UROtsa cells, and ODD levels corresponded to the levels of increased invasiveness, colony formation, and hypersecretion of active MMP-2 and -9 seen after transformation to an in vitro cancer phenotype. CONCLUSION Arsenic biomethylation appears to be obligatory for arsenic-induced ODD and appears linked in some cells with the accelerated transition to an in vitro cancer phenotype.
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Affiliation(s)
- Chikara Kojima
- Inorganic Carcinogenesis Section, Laboratory of Comparative Carcinogenesis, Center for Cancer Research, National Cancer Institute at National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
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Wnek SM, Medeiros MK, Eblin KE, Gandolfi AJ. Persistence of DNA damage following exposure of human bladder cells to chronic monomethylarsonous acid. Toxicol Appl Pharmacol 2009; 241:202-9. [PMID: 19699219 DOI: 10.1016/j.taap.2009.08.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Revised: 08/05/2009] [Accepted: 08/14/2009] [Indexed: 12/25/2022]
Abstract
Malignant transformation was demonstrated in UROtsa cells following 52-weeks of exposure to 50 nM monomethylarsonous acid (MMA(III)); the result was the malignantly transformed cell line, URO-MSC. URO-MSC cells were used to study the induction of DNA damage and the alteration of DNA repair enzymes in both the presence of MMA(III) [URO-MSC(+)] and after subsequent removal of MMA(III) [URO-MSC(-)] following chronic, low-level exposure. In the presence of MMA(III), URO-MSC(+) cells demonstrated a sustained increase in DNA damage following 12-weeks of exposure; in particular, a significant increase in DNA single-strand breaks at 12-weeks of exposure consistently elevated through 52 weeks. The persistence of DNA damage in URO-MSC cells was assessed after a 2-week removal of MMA(III). URO-MSC(-) cells demonstrated a decrease in DNA damage compared to URO-MSC(+); however, DNA damage in URO-MSC(-) remained significantly elevated when compared to untreated UROtsa and increased in a time-dependent manner. Reactive oxygen species (ROS) were demonstrated to be a critical component in the generation of DNA damage determined through the incubation of ROS scavengers with URO-MSC cells. Poly (ADP-ribose) polymerase (PARP) is a key repair enzyme in DNA single-strand break repair. URO-MSC(+) resulted in a slight increase in PARP activity after 36-weeks of MMA(III) exposure, suggesting the presence of MMA(III) is inhibiting the increase in PARP activity. In support, PARP activity in URO-MSC(-) increased significantly, coinciding with a subsequent decrease in DNA damage demonstrated in URO-MSC(-) compared to URO-MSC(+). These data demonstrate that chronic, low-level exposure of UROtsa cells to 50 nM MMA(III) results in: the induction of DNA damage that remains elevated upon removal of MMA(III); increased levels of ROS that play a role in MMA(III) induced-DNA damage; and decreased PARP activity in the presence of MMA(III).
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Affiliation(s)
- S M Wnek
- Department of Pharmacology and Toxicology, University of Arizona, 1703 E. Mabel St., Tucson, AZ 85721, USA
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Takata A, Yamauchi H, Toya T, Aminaka M, Shinohara Y, Kohyama N, Yoshida K. Forsterite exposure causes less oxidative DNA damage and lung injury than chrysotile exposure in rats. Inhal Toxicol 2009; 21:739-46. [DOI: 10.1080/08958370802492399] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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