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Vázquez Cervantes GI, González Esquivel DF, Ramírez Ortega D, Blanco Ayala T, Ramos Chávez LA, López-López HE, Salazar A, Flores I, Pineda B, Gómez-Manzo S, Pérez de la Cruz V. Mechanisms Associated with Cognitive and Behavioral Impairment Induced by Arsenic Exposure. Cells 2023; 12:2537. [PMID: 37947615 PMCID: PMC10649068 DOI: 10.3390/cells12212537] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/25/2023] [Accepted: 10/27/2023] [Indexed: 11/12/2023] Open
Abstract
Arsenic (As) is a metalloid naturally present in the environment, in food, water, soil, and air; however, its chronic exposure, even with low doses, represents a public health concern. For a long time, As was used as a pigment, pesticide, wood preservative, and for medical applications; its industrial use has recently decreased or has been discontinued due to its toxicity. Due to its versatile applications and distribution, there is a wide spectrum of human As exposure sources, mainly contaminated drinking water. The fact that As is present in drinking water implies chronic human exposure to this metalloid; it has become a worldwide health problem, since over 200 million people live where As levels exceed safe ranges. Many health problems have been associated with As chronic exposure including cancer, cardiovascular diseases, gastrointestinal disturbances, and brain dysfunctions. Because As can cross the blood-brain barrier (BBB), the brain represents a target organ where this metalloid can exert its long-term toxic effects. Many mechanisms of As neurotoxicity have been described: oxidative stress, inflammation, DNA damage, and mitochondrial dysfunction; all of them can converge, thus leading to impaired cellular functions, cell death, and in consequence, long-term detrimental effects. Here, we provide a current overview of As toxicity and integrated the global mechanisms involved in cognitive and behavioral impairment induced by As exposure show experimental strategies against its neurotoxicity.
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Affiliation(s)
- Gustavo Ignacio Vázquez Cervantes
- Neurobiochemistry and Behavior Laboratory, National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez”, Mexico City 14269, Mexico; (G.I.V.C.); (D.F.G.E.); (T.B.A.); (H.E.L.-L.)
| | - Dinora Fabiola González Esquivel
- Neurobiochemistry and Behavior Laboratory, National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez”, Mexico City 14269, Mexico; (G.I.V.C.); (D.F.G.E.); (T.B.A.); (H.E.L.-L.)
| | - Daniela Ramírez Ortega
- Neuroimmunology Department, National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez”, Mexico City 14269, Mexico; (D.R.O.); (A.S.); (I.F.); (B.P.)
| | - Tonali Blanco Ayala
- Neurobiochemistry and Behavior Laboratory, National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez”, Mexico City 14269, Mexico; (G.I.V.C.); (D.F.G.E.); (T.B.A.); (H.E.L.-L.)
| | - Lucio Antonio Ramos Chávez
- Departamento de Neuromorfología Funcional, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico City 14370, Mexico;
| | - Humberto Emanuel López-López
- Neurobiochemistry and Behavior Laboratory, National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez”, Mexico City 14269, Mexico; (G.I.V.C.); (D.F.G.E.); (T.B.A.); (H.E.L.-L.)
| | - Alelí Salazar
- Neuroimmunology Department, National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez”, Mexico City 14269, Mexico; (D.R.O.); (A.S.); (I.F.); (B.P.)
| | - Itamar Flores
- Neuroimmunology Department, National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez”, Mexico City 14269, Mexico; (D.R.O.); (A.S.); (I.F.); (B.P.)
| | - Benjamín Pineda
- Neuroimmunology Department, National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez”, Mexico City 14269, Mexico; (D.R.O.); (A.S.); (I.F.); (B.P.)
| | - Saúl Gómez-Manzo
- Laboratorio de Bioquímica Genética, Instituto Nacional de Pediatría, Secretaría de Salud, México City 04530, Mexico;
| | - Verónica Pérez de la Cruz
- Neurobiochemistry and Behavior Laboratory, National Institute of Neurology and Neurosurgery “Manuel Velasco Suárez”, Mexico City 14269, Mexico; (G.I.V.C.); (D.F.G.E.); (T.B.A.); (H.E.L.-L.)
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Butler EE, Karagas MR, Demidenko E, Bellinger DC, Korrick SA. In utero arsenic exposure and early childhood motor development in the New Hampshire Birth Cohort Study. FRONTIERS IN EPIDEMIOLOGY 2023; 3:1139337. [PMID: 38455900 PMCID: PMC10910989 DOI: 10.3389/fepid.2023.1139337] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/21/2023] [Indexed: 03/09/2024]
Abstract
Introduction High-level prenatal and childhood arsenic (As) exposure characteristic of several regions in Asia (e.g., Bangladesh), may impact motor function. However, the relationship between lower-level arsenic exposure (characteristic of other regions) and motor development is largely unstudied, despite the potential for deficient motor skills in childhood to have adverse long-term consequences. Thus, we sought to investigate the association between prenatal As exposure and motor function among 395 children in the New Hampshire Birth Cohort Study, a rural cohort from northern New England. Methods Prenatal exposure was estimated by measuring maternal urine speciated As at 24-28 weeks of gestation using high-performance liquid chromatography (HPLC) inductively coupled plasma mass spectrometry (ICP-MS) and summing inorganic As, monomethylarsonic acid, and dimethylarsinic acid to obtain total urinary As (tAs). Motor function was assessed with the Bruininks-Oseretsky Test of Motor Proficiency, 2nd Edition (BOT-2) at a mean (SD) age of 5.5 (0.4) years. Results Children who completed this exam were largely reported as white race (97%), born to married mothers (86%) with a college degree or higher (67%). The median (IQR) gestational urine tAs concentration was 4.0 (5.0) µg/L. Mean (SD) BOT-2 scores were 48.6 (8.4) for overall motor proficiency and 48.2 (9.6) for fine manual control [standard score = 50 (10)], and were 16.3 (5.1) for fine motor integration and 12.5 (4.1) for fine motor precision [standard score = 15 (5)]. We found evidence of a non-linear dose response relationship and used a change-point model to assess the association of tAs with overall motor proficiency and indices of fine motor integration, fine motor precision, and their composite, fine manual control, adjusted for age and sex. In models adjusted for potential confounders, each doubling of urine tAs decreased overall motor proficiency by -3.3 points (95% CI: -6.1, -0.4) for tAs concentrations greater than the change point of 9.5 µg/L and decreased fine motor integration by -4.3 points (95% CI: -8.0, -0.6) for tAs concentrations greater than the change point of 17.0 µg/L. Discussion In summary, we found that levels of prenatal As exposure above an empirically-derived threshold (i.e., the change point) were associated with decrements in childhood motor development in a US population.
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Affiliation(s)
- Erin E. Butler
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - Margaret R. Karagas
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
- Children’s Environmental Health and Disease Prevention Research Center, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - Eugene Demidenko
- Department of Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - David C. Bellinger
- Department of Neurology, Boston Children’s Hospital, Harvard Medical School, Boston, MA, United States
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, United States
| | - Susan A. Korrick
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, United States
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
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Rachamalla M, Salahinejad A, Khan M, Datusalia AK, Niyogi S. Chronic dietary exposure to arsenic at environmentally relevant concentrations impairs cognitive performance in adult zebrafish (Danio rerio) via oxidative stress and dopaminergic dysfunction. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 886:163771. [PMID: 37164085 DOI: 10.1016/j.scitotenv.2023.163771] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/17/2023] [Accepted: 04/23/2023] [Indexed: 05/12/2023]
Abstract
The current study was designed to evaluate the effects of chronic dietary arsenic exposure on the cognitive performance of adult zebrafish and uncover probable pathways by which arsenic mediates such neurotoxic effects. Adult zebrafish were treated with 3 different dietary arsenic concentrations (30, 60, and 100 μg/g dry weight (dw), as arsenite) in addition to control for 60 days. A latent learning paradigm, which employs a complex maze, was used to assess the cognitive performance of fish. Our results demonstrated that dietary treatment with arsenic, especially at medium (60 μg/g dw) and high (100 μg/g dw) exposure dose levels, significantly impaired the performance of fish in various latent learning tasks evaluated in the present study. Concomitant with cognitive dysfunction, chronic dietary exposure to arsenic was also found to increase arsenic accumulation and dopamine levels, and induce oxidative stress (reduced thiol redox, increased lipid peroxidation and expression of antioxidant enzyme genes) in the brain of zebrafish in a dose-dependent manner. Dopaminergic system in the brain is known to play a critical role in regulating cognitive behaviours in fish, and our observations suggested that chronic dietary treatment with medium and high arsenic doses leads to significant alterations in the expression of genes involved in dopamine signalling (dopamine receptors), synthesis (thyroxine hydroxylase) and metabolism (monoamine oxidase) in the zebrafish brain. Moreover, we also recorded significant downregulation of genes such as the brain-derived neurotrophic factor (BDNF) and ectonucleotidases (entpd2_mg, entpd2_mq, and 5'-nucleotidase), which are critical for learning and memory functions, in the zebrafish brain following chronic dietary exposure to arsenic. Overall, the present study suggests that chronic environmentally relevant dietary exposure to arsenic can impair the cognitive performance in zebrafish, essentially by inducing oxidative stress and disrupting the dopaminergic neurotransmission in the brain.
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Affiliation(s)
- Mahesh Rachamalla
- Department of Biology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada.
| | - Arash Salahinejad
- Department of Biology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
| | - Maria Khan
- College of Kinesiology, University of Saskatchewan, Saskatoon, SK S7N 5B2, Canada
| | - Ashok Kumar Datusalia
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research-Raebareli, Lucknow 226002, India
| | - Som Niyogi
- Department of Biology, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada; Toxicology Centre, University of Saskatchewan, 44 Campus Drive, Saskatoon, SK S7N 5B3, Canada
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Inorganic arsenic alters the development of dopaminergic neurons but not serotonergic neurons and induces motor neuron development via Sonic hedgehog pathway in zebrafish. Neurosci Lett 2023; 795:137042. [PMID: 36587726 DOI: 10.1016/j.neulet.2022.137042] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/15/2022] [Accepted: 12/27/2022] [Indexed: 12/30/2022]
Abstract
The mechanism of inorganic arsenic-induced neurotoxicity at the cellular level is not known. In zebrafish, teratological effects of inorganic arsenic have been shown at various concentrations. Here, we used similar concentrations of inorganic arsenic to evaluate the effects on specific neuron types. Exposure of zebrafish embryos at 5 h post fertilization (hpf) to sodium arsenite induced developmental toxicity (reduced body length) in 72 hpf larvae, beginning at a concentration of 300 mg/L concentration. Mortality or overt morphological deformity was detected at 500 mg/L sodium arsenite. While 200 mg/L sodium arsenite induced development of tyrosine hydroxylase-positive (dopaminergic) neurons, there was no significant effect on the development of 5-hydroxytryptamine (serotonergic) neurons. Sodium arsenite reduced acetylcholinesterase activity. In the hb9-GFP transgenic larvae, both 200 and 400 mg/L sodium arsenite produced supernumerary motor neurons in the spinal cord. Inhibition of the Sonic hedgehog (Shh) pathway that is essential for motor neuron development, by Gant61, prevented sodium arsenite-induced supernumerary motor neuron development. Inductively coupled plasma mass spectrometry (ICP-MS) revealed that with 200 mg/L and 400 mg/L sodium arsenite treatment, each larva had an average of 387.8 pg and 847.5 pg arsenic, respectively. The data show for the first time that inorganic arsenic alters the development of dopaminergic and motor neurons in the zebrafish larvae and the latter occurs through the Shh pathway. These results may help understand why arsenic-exposed populations suffer from psychiatric disorders and motor neuron disease and Shh may, potentially, serve as a plasma biomarker of arsenic toxicity.
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Niño SA, Chi-Ahumada E, Carrizales L, Estrada-Sánchez AM, Gonzalez-Billault C, Zarazúa S, Concha L, Jiménez-Capdeville ME. Life-long arsenic exposure damages the microstructure of the rat hippocampus. Brain Res 2022; 1775:147742. [PMID: 34848172 DOI: 10.1016/j.brainres.2021.147742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 12/19/2022]
Abstract
Epidemiological studies demonstrate that arsenic exposure is associated with cognitive dysfunction. Experimental arsenic exposure models showed learning and memory deficits and molecular changes resembling the functional and pathologic neurodegeneration features. The present work focuses on hippocampal pathological changes in Wistar rats induced by continuous arsenic exposure from in utero up to 12 months of age, evaluated by magnetic resonance imaging along with immunohistochemistry. Diffusion-weighted images revealed age-related lower fractional anisotropy and higher radial-axial and mean diffusivity at 6 and 12 months, indicating that arsenic exposure leads to hippocampal demyelination. These structural alterations were paralleled by immunohistochemical changes that showed a significant loss of myelin basic protein in CA1 and CA3 regions accompanied by increased glial fibrillary acidic protein expression at all time-points studied. Concomitantly, arsenic exposure induced an altered morphology of astrocytes at all studied ages, whereas increased synaptogenesis was only observed at two months of age. These results suggest that environmental arsenic exposure is linked to impaired hippocampal connectivity and perhaps early glial senescence, which together might resemble a premature aging phenomenon leading to cognitive deficits.
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Affiliation(s)
- Sandra A Niño
- Facultad de Medicina, Universidad Autónoma de San Luis Potosí, San Luis Potosí, San Luis Potosí, Mexico; Geroscience Center for Brain Health and Metabolism (GERO), Santiago de Chile, Chile
| | - Erika Chi-Ahumada
- Facultad de Medicina, Universidad Autónoma de San Luis Potosí, San Luis Potosí, San Luis Potosí, Mexico
| | - Leticia Carrizales
- Coordination for Innovation and Application of Science and Technology (CIACYT), Universidad Autónoma de San Luis Potosí, San Luis Potosí, San Luis Potosí, Mexico
| | - Ana María Estrada-Sánchez
- División de Biología Molecular, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), San Luis Potosí, San Luis Potosi, Mexico
| | - Christian Gonzalez-Billault
- Department of Biology, Faculty of Sciences, Universidad de Chile, Santiago de Chile, Chile; Geroscience Center for Brain Health and Metabolism (GERO), Santiago de Chile, Chile
| | - Sergio Zarazúa
- Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, San Luis Potosí, San Luis Potosí, Mexico
| | - Luis Concha
- Instituto de Neurobiología, UNAM Campus Juriquilla, Querétaro, Querétaro, Mexico
| | - María E Jiménez-Capdeville
- Facultad de Medicina, Universidad Autónoma de San Luis Potosí, San Luis Potosí, San Luis Potosí, Mexico.
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Li X, Fan L, Wang X, Yang Y, Zhu Y, Han X, Li L, Ge T, Liu H, Qi J, Gong S, Zhang Q, Guo W, Su L, Yao X, Wang X. Characteristics, distribution, and children exposure assessment of 13 metals in household dust in China: A big data pilot study. INDOOR AIR 2022; 32:e12943. [PMID: 34664315 DOI: 10.1111/ina.12943] [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: 04/28/2021] [Revised: 10/03/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
To explore the pollution characteristics of metals in household dust in China and their exposure to children, this study searched peer-reviewed papers published during 1980-2020 and analyzed 30 eligible papers screened under the per-decided strategy. We evaluated the sample-weighted concentration (SWC) of each metal, explored the sources of metals, and presented the quantitative description of spatial-temporary characteristics and children exposure to 13 metals with multi-route under a general living scenario. The results showed the concentrations of 13 metals with a range of 0.89-29 090.19 mg/kg. The SWC of Cd in household dust from rural areas was 3.29 times of that from urban areas, while the SWC of Ni from urban areas was 3.71 times of that from rural areas. The results showed that four principal components were extracted, and the cumulative contribution rate reached 79.127%. The exposure dose of 13 metals to children aged 2-3 years was presented with the highest by ingestion. Metals such as Fe, Zn, and Mn posed inevitable health risk to children with high exposure. Countermeasures should be carried out to minimize the children exposure to metals in household dust urgently, such as the establishment of environmental health standard for household dust.
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Affiliation(s)
- Xu Li
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Lin Fan
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xinqi Wang
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yuyan Yang
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yuanduo Zhu
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xu Han
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Li Li
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Tanxi Ge
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Hang Liu
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Jing Qi
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Shuhan Gong
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Qing Zhang
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Wenhong Guo
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Liqin Su
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xiaoyuan Yao
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xianliang Wang
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, China
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de Water E, Curtin P, Gennings C, Chelonis JJ, Paule M, Bixby M, McRae N, Svensson K, Schnaas L, Pantic I, Téllez-Rojo MM, Wright RO, Horton MK. Prenatal metal mixture concentrations and reward motivation in children. Neurotoxicology 2022; 88:124-133. [PMID: 34793781 PMCID: PMC8748386 DOI: 10.1016/j.neuro.2021.11.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 11/11/2021] [Accepted: 11/14/2021] [Indexed: 01/03/2023]
Abstract
Reward motivation is a complex umbrella term encompassing the cognitions, emotions, and behaviors involved in the activation, execution, and persistence of goal-directed behavior. Altered reward motivation in children is characteristic of many neurodevelopmental and psychiatric disorders. Previously difficult to operationalize, the Progressive Ratio (PR) task has been widely used to assess reward motivation in animal and human studies, including children. Because the neural circuitry supporting reward motivation starts developing during pregnancy, and is sensitive to disruption by environmental toxicants, including metals, the goal of this study was to examine the association between prenatal concentrations of a mixture of neurotoxic metals and reward motivation in children. We measured reward motivation by administering a PR test to 373 children ages 6-8 years enrolled in the Programming Research in Obesity, Growth, Environment and Social Stressors (PROGRESS) Study in Mexico City. Children were asked to press a response lever for a token reward; one press on the response lever was required to earn the first token and each subsequent token required an additional 10 lever presses. Maternal blood concentrations of lead, manganese, zinc, arsenic, cadmium, and selenium were measured using inductively-coupled plasma mass spectrometry during the 2nd and 3rd trimesters of pregnancy. We performed generalized Weighted Quantile Sum (gWQS) regression analyses to examine associations between the prenatal metal mixture and reward motivation; adjusting for child sex, birthweight and age; and maternal IQ, education, and socioeconomic status. The prenatal metal mixture was significantly associated with higher motivation as indicated by more lever presses (ß = 0.02, p < 0.001) and a shorter time between receiving the reinforcer and the first press (ß = 0.23, p = 0.01), and between subsequent presses (ß = 0.07, p = 0.005). Contributions of different metals to this association differed by trimester and child sex. These findings suggest that children with increased exposure to metal during the 2nd and 3rd trimesters of gestation demonstrate increased reward motivation, which may reflect a tendency to perseverate or hypersensitivity to positive reinforcement.
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Affiliation(s)
- Erik de Water
- Icahn School of Medicine at Mount Sinai, New York, NY, USA,Corresponding author: Erik de Water, PhD, Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1057, New York, NY 10029, United States, , T: 212-824-7301
| | - Paul Curtin
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Chris Gennings
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - John J. Chelonis
- U.S. Food and Drug Administration, National Center for Toxicological Research, Jefferson, AR, USA
| | - Merle Paule
- U.S. Food and Drug Administration, National Center for Toxicological Research, Jefferson, AR, USA
| | - Moira Bixby
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Nia McRae
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Lourdes Schnaas
- National Institute of Perinatology (INPer), Mexico City, Mexico
| | - Ivan Pantic
- National Institute of Perinatology (INPer), Mexico City, Mexico
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Kim H, Lee D, Kim K. Combined Exposure to Metals in Drinking Water Alters the Dopamine System in Mouse Striatum. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18126558. [PMID: 34207128 PMCID: PMC8296366 DOI: 10.3390/ijerph18126558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Revised: 06/15/2021] [Accepted: 06/17/2021] [Indexed: 11/25/2022]
Abstract
Environmental exposure to arsenic (As), lead (Pb), and cadmium (Cd) frequently occurs; however, data on the specific effects of combined exposure on neurotransmission, specifically dopaminergic neurotransmission, are lacking. In this study, motor coordination and dopamine content, along with the expression of tyrosine hydroxylase (TH), dopamine transporter (DAT), vesicular monoamine transporter 2 (VMAT2), and dopamine receptors (DRs), were examined in the striatum of adult male mice following exposure to drinking water containing As, Pb, and/or Cd. We found that exposure to a metal mixture impaired motor coordination. After 4 weeks of treatment, a significant decrease in dopamine content and expression of TH, DAT, and VMAT2 was observed in the striatum of metal-mixture-treated mice, compared to the controls or single-metal-exposed groups. However, DRD1 and DRD2 expression did not significantly change with metal treatment. These results suggest that altered dopaminergic neurotransmission by the collective action of metals may contribute to metal-mixture-induced neurobehavioral disorders.
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Affiliation(s)
| | | | - Kisok Kim
- Correspondence: ; Tel.: +82-53-580-5932
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Pakzad D, Akbari V, Sepand MR, Aliomrani M. Risk of neurodegenerative disease due to tau phosphorylation changes and arsenic exposure via drinking water. Toxicol Res (Camb) 2021; 10:325-333. [PMID: 33884182 PMCID: PMC8045564 DOI: 10.1093/toxres/tfab011] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/28/2020] [Accepted: 01/24/2021] [Indexed: 12/12/2022] Open
Abstract
It is estimated that around 140 million people are drinking highly contaminated water with arsenic (As) as a natural earth's crust component. On the other hand, the prevalence of neurodegenerative disorders, especially Alzheimer's disease, is constantly increasing. The aim of the present study was to investigate the correlation between oral arsenic trioxide exposure and its impact on tau protein phosphorylation at Ser262. Fifty-four male mice were randomly divided into three groups and were freely accessed to food and contaminated water of 1 and 10 ppm arsenic trioxide for 3 months, except for control subjects. At the end of each month, As concentration and tau phosphorylation were checked with graphite furnace atomic absorption spectrometer and western blot analysis, respectively. Surprisingly, it was observed that the amount of measured brain arsenic in 10 ppm-exposed subjects was significantly increased after 3 months (P-value ˂ 0.0001). The significant changes in tau phosphorylation were not seen in the 1 ppm-exposed subjects, and it was observed that Ser262 phosphorylation significantly increased after 2 and 3 months in the 10 ppm group (P-value < 0.05). Our results demonstrated that arsenic accumulated in the brain time-dependently and increased Ser262 tau phosphorylation, which is very important in several tauopathies. In conclusion, it could be inferred that environmental arsenic exposure even at very low concentrations could be considered as a reason for increasing the risk of developing neurodegenerative disease.
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Affiliation(s)
- Davoud Pakzad
- Isfahan University of Medical Sciences and Health Services, Isfahan 81746-73461, Iran
| | - Vajihe Akbari
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Isfahan University of Medical Sciences and Health Services, Isfahan 81746-73461, Iran
| | - Mohammad Reza Sepand
- Department of Toxicology and Pharmacology, School of Pharmacy and Pharmaceutical Sciences, Tehran University of Medical Sciences and Health Services, Tehran 81746-73461, Iran
| | - Mehdi Aliomrani
- Department of Toxicology and Pharmacology, Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences and Health Services, Isfahan 81746-73461, Iran
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Umezu T, Shibata Y. Toxicokinetic characteristics and effects of diphenylarsinic acid on dopamine in the striatum of free-moving mice. Neurotoxicology 2021; 83:106-115. [PMID: 33417988 DOI: 10.1016/j.neuro.2020.12.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 12/14/2020] [Accepted: 12/21/2020] [Indexed: 10/22/2022]
Abstract
Diphenylarsinic acid (DPAA), an artificial phenyl arsenic compound, is considered a groundwater pollutant in Japan. Previous human and animal studies suggested that DPAA affects the central nervous system; however, these effects are poorly understood. The present study investigated the toxicokinetic characteristics and effects of DPAA on dopamine (DA) in the striatum of free-moving mice after a single oral administration. In a simultaneous blood and brain microdialysis study, only DPAA was detectable in both blood and striatum dialysate samples immediately after DPAA administration. DPAA concentrations in the striatum and blood dialysate rapidly reached a maximum, then decreased over time in an essentially parallel manner. A more detailed brain microdialysis examination of intracerebral kinetics revealed that the concentration of DPAA in the striatum dialysate began to increase within 15 min, reaching a maximum approximately 1 h after administration, and then decreased with a biological half-life of approximately 2 h. Moreover, a single oral administration of DPAA at 0.5-32 mg/kg affected the extracellular DA level in the striatum. The effect on DA level changed slowly after DPAA administration, with a bell-shaped dose-response relationship. The present study suggests that DPAA is rapidly absorbed into the blood circulating in the gastrointestinal tract and passes through the blood-brain barrier to subsequently affect DA levels in the striatum in mice after a single oral administration.
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Affiliation(s)
- Toyoshi Umezu
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
| | - Yasuyuki Shibata
- Center for Environmental Measurement and Analysis, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
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11
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Dominguez S, Lencinas I, Bartos M, Gallegos C, Bras C, Mónaco N, Minetti A, Gumilar F. Neurobehavioral and neurochemical effects in rats offspring co-exposed to arsenic and fluoride during development. Neurotoxicology 2021; 84:30-40. [PMID: 33609566 DOI: 10.1016/j.neuro.2021.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 02/11/2021] [Accepted: 02/14/2021] [Indexed: 11/29/2022]
Abstract
Arsenic (iAs) and fluoride (F) are ubiquitous in the environment. All over the world, in many countries, thousands of people are suffering from the toxic effects of arsenicals ad fluorides. These two elements are recognized worldwide as the most serious inorganic contaminants in drinking water. When two different types of toxicants are simultaneously going inside the human body they may function independently or can act as synergistic or antagonistic to one another. Although there have been reports in literature of individual toxicity of iAs and F, however, not much is known about the effects following the combined exposure to the toxicants above mentioned. In this work, we investigated the effect of the co-exposure to low levels of iAs/F through drinking water during pregnancy and lactation on central nervous system functionality in the exposed rats offspring. Wistar rats were exposed to one of these solutions: 0.05 mg/L iAs and 5 mg/L F (Concentration A) or 0.10 mg/L iAs and 10 mg/L F (Concentration B) from gestational day 0 up to post-gestational day 21. Sensory-motor reflexes a Functional Observational Battery and the locomotor activity in an open field were assessed in offspring. Additionally, the transaminases, acethylcholinesterase and catalase levels in the striatum were determined to elucidate the possible molecular mechanisms involved in locomotor and neurobehavioral disorders. The results showed that iAs/F exposition during development produces a delay reach the maturity of sensorimotor reflexes. A decrease in the nociceptive reflex response, and increase in the locomotor activity in adult rats offspring were observed. The increase in oxidative stress, the inhibition of transaminases enzymes and the inhibition of AChE in the striatum may partially regulate all the neurobehavioral disorders observed.
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Affiliation(s)
- Sergio Dominguez
- Laboratorio de Toxicología, Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Depto. de Biología, Bioquímica y Farmacia, San Juan 670, 8000, Bahía Blanca, Argentina
| | - Ileana Lencinas
- Laboratorio de Toxicología, Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Depto. de Biología, Bioquímica y Farmacia, San Juan 670, 8000, Bahía Blanca, Argentina
| | - Mariana Bartos
- Laboratorio de Toxicología, Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Depto. de Biología, Bioquímica y Farmacia, San Juan 670, 8000, Bahía Blanca, Argentina
| | - Cristina Gallegos
- Laboratorio de Toxicología, Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Depto. de Biología, Bioquímica y Farmacia, San Juan 670, 8000, Bahía Blanca, Argentina
| | - Cristina Bras
- Laboratorio de Toxicología, Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Depto. de Biología, Bioquímica y Farmacia, San Juan 670, 8000, Bahía Blanca, Argentina
| | - Nina Mónaco
- Laboratorio de Toxicología, Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Depto. de Biología, Bioquímica y Farmacia, San Juan 670, 8000, Bahía Blanca, Argentina
| | - Alejandra Minetti
- Laboratorio de Toxicología, Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Depto. de Biología, Bioquímica y Farmacia, San Juan 670, 8000, Bahía Blanca, Argentina
| | - Fernanda Gumilar
- Laboratorio de Toxicología, Instituto de Investigaciones Biológicas y Biomédicas del Sur (INBIOSUR), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Depto. de Biología, Bioquímica y Farmacia, San Juan 670, 8000, Bahía Blanca, Argentina.
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12
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Drobna Z. Activation of Lrrk2 and α-Synuclein in substantia nigra, striatum, and cerebellum after chronic exposure to arsenite. Toxicol Appl Pharmacol 2020; 408:115278. [DOI: 10.1016/j.taap.2020.115278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 10/03/2020] [Accepted: 10/09/2020] [Indexed: 12/18/2022]
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13
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Medda N, Patra R, Ghosh TK, Maiti S. Neurotoxic Mechanism of Arsenic: Synergistic Effect of Mitochondrial Instability, Oxidative Stress, and Hormonal-Neurotransmitter Impairment. Biol Trace Elem Res 2020; 198:8-15. [PMID: 31939057 DOI: 10.1007/s12011-020-02044-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 01/07/2020] [Indexed: 12/12/2022]
Abstract
Arsenic toxicity which is now a global concern is predicted to affect more than 200 million people. Chronic arsenic exposure conduce carcinogenicity, hepatotoxicity, and neurotoxicity. Here we have reviewed numerous epidemiological and experimental reports related to arsenic toxicity to explore its neurotoxicity mechanism. Penetrability of this metalloid through blood-brain barrier makes it a potent neuro-toxicant by inducing mitochondrial membrane instability and calorie exhaustion. It directly affects the cortex, cerebellum region, and specially microglial cells by the induction of a variety of pro-inflammatory cytokines like TNF-α, IL-6, etc. Pro-apoptotic signaling and the caspase activation by arsenic initiate large-scale tissue damage. Severe diminution of the antioxidant enzymes like superoxide dismutase, catalase, and GPx increases the tissue damage by reactive oxygen and nitrogen species. Hormonal imbalance and neurotransmitter dysregulations make the neural damage and synergism of so many toxic effects create nonresponsive neural control over multiple organs. That enhances the peripheral major organ damage besides direct arsenic effects on these organs. There is motor and cognitive dysfunction which may initiate Parkinsonism- and Alzheimer's-like symptoms. Our present analysis is helpful for the therapeutic studies on arsenic or other heavy metal associated neurological dysfunction.
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Affiliation(s)
- Nandita Medda
- Department of Biochemistry and Biotechnology, Cell and Molecular Therapeutics Laboratory, Oriental Institute of Science and Technology, Vidyasagar University, Midnapore, West Bengal, 721102, India
| | - Ritesh Patra
- Department of Biochemistry and Biotechnology, Cell and Molecular Therapeutics Laboratory, Oriental Institute of Science and Technology, Vidyasagar University, Midnapore, West Bengal, 721102, India
| | - Tamal K Ghosh
- Department of Health and Family Welfare, Government of West Bengal, Salt Lake, Calcutta, India
| | - Smarajit Maiti
- Department of Biochemistry and Biotechnology, Cell and Molecular Therapeutics Laboratory, Oriental Institute of Science and Technology, Vidyasagar University, Midnapore, West Bengal, 721102, India.
- Epidemiology and Human Health Division, Agricure Biotech Research Society, Midnapore, 721101, India.
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14
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Chávez-Pichardo ME, Reyes-Bravo DY, Mendoza-Trejo MS, Marín-López AG, Giordano M, Hernández-Chan N, Domínguez-Marchan K, Ortega-Rosales LC, Rodríguez VM. Brain alterations in GABA, glutamate and glutamine markers after chronic atrazine exposure in the male albino rat. Arch Toxicol 2020; 94:3217-3230. [PMID: 32561961 DOI: 10.1007/s00204-020-02806-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 06/15/2020] [Indexed: 11/28/2022]
Abstract
Atrazine (ATR; 2-chloro-4-ethylamino-6-isopropylamino-s-triazine) is an herbicide widely used to kill annual grasses and broadleaf weeds in crops such as corn, sorghum, and sugarcane. Studies in rodents have shown that chronic ATR exposure is associated with alterations in the nigrostriatal dopaminergic pathway such as hyperactivity, decreased striatal dopamine levels, and diminished numbers of tyrosine hydroxylase positive cells in substantia nigra pars compacta. However, the effects of ATR on neurotransmitters such as GABA and glutamate have been scarcely studied. To evaluate the impact of ATR on motor and anxiety tasks, tissue levels of GABA, glutamate, glutamine, and extracellular and potassium-evoked release of glutamate in the striatum, we daily exposed Sprague-Dawley male rats to 1 or 10 mg ATR/kg of body weight for 12-14 months. As previously reported, chronic ATR exposure causes hyperactivity in the group exposed to 10 mg ATR/kg and increased anxiety in both groups exposed to ATR. GABA, glutamate, and glutamine levels were differentially altered in brain regions related to nigrostriatal and mesolimbic systems, the amygdala, and the prefrontal cortex. The groups exposed to 10 mg ATR/kg showed increased extracellular levels and release of glutamate in the striatum. These neurochemical alterations could underlie the behavioral changes observed in rats. These results indicate that chronic exposure to the herbicide ATR disrupts the neurochemistry of several brain structures and could be a risk factor for the development of neurodegenerative diseases.
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Affiliation(s)
- M E Chávez-Pichardo
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro, 76230, México
| | - D Y Reyes-Bravo
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro, 76230, México
| | - M S Mendoza-Trejo
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro, 76230, México
| | - A G Marín-López
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro, 76230, México
| | - M Giordano
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro, 76230, México
| | - N Hernández-Chan
- Facultad de Ingeniería, Universidad Autónoma de Querétaro, Querétaro, México
| | - K Domínguez-Marchan
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro, 76230, México
| | - L C Ortega-Rosales
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro, 76230, México
| | - V M Rodríguez
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Boulevard Juriquilla 3001, Querétaro, Querétaro, 76230, México.
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15
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Exposure to low doses of inorganic arsenic induces transgenerational changes on behavioral and epigenetic markers in zebrafish (Danio rerio). Toxicol Appl Pharmacol 2020; 396:115002. [PMID: 32277946 DOI: 10.1016/j.taap.2020.115002] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 03/26/2020] [Accepted: 04/07/2020] [Indexed: 02/06/2023]
Abstract
The ability of environmental pollutants to alter the epigenome with resultant development of behavioral alterations has received more attention in recent years. These alterations can be transmitted and affect later generations that have not been directly in contact with the contaminant. Arsenic (As) is a neurotoxicant and potent epigenetic disruptor that is widespread in the environment; however, the precise potential of As to produce transgenerational effects is unknown. Our study focused on the possible transgenerational effects on behavior by ancestral exposure to doses relevant to the environment of As, and the epigenetic mechanisms that could be involved. Embryos of F0 (ancestral generation) were directly exposed to 50 or 500 ppb of As for 150 days. F0 adults were raised to produce the F1 generation (intergeneration) and subsequently the F2 generation (transgeneration). We evaluated motor and cognitive behavior, neurodevelopment-related genes, and epigenetic markers on the F0 and F2 generation. As proposed in our hypothesis, ancestral arsenic exposure altered motor activity through the development and increased anxiety-like behaviors which were transmitted to the F2 generation. Additionally, we found a reduction in brain-derived neurotrophic factor expression between the F0 and F2 generation, and an increase in methylation on histone H3K4me3 in the nervous system.
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16
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Amuno S, Rudko DA, Gallino D, Tuznik M, Shekh K, Kodzhahinchev V, Niyogi S, Chakravarty MM, Devenyi GA. Altered neurotransmission and neuroimaging biomarkers of chronic arsenic poisoning in wild muskrats (Ondatra zibethicus) and red squirrels (Tamiasciurus hudsonicus) breeding near the City of Yellowknife, Northwest Territories (Canada). THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 707:135556. [PMID: 31780150 DOI: 10.1016/j.scitotenv.2019.135556] [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: 09/06/2019] [Revised: 11/12/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
Chronic arsenic poisoning has been shown to be a risk factor for the development of intellectual disability. Numerous human and animal studies have also confirmed that low-level arsenic exposure has deleterious effects on neurotransmission and brain structures which have been further linked to neurobehavioral disorders. The aim of this present work was to comparatively assess structural brain volume changes and alteration of two (2) neurotransmitters, specifically dopamine (DA) and serotonin (5-HT) in the brains of wild muskrats and squirrels breeding in arsenic endemic areas, near the vicinity of the abandoned Giant mine site in Yellowknife and in reference locations between 52 and 105 km from the city of Yellowknife. The levels of DA and 5-HT were measured in the brain tissues, and Magnetic Resonance Imaging (MRI) was used to attempt brain volume measurements. The results revealed that the concentrations of DA and 5-HT were slightly increased in the brains of squirrels from the arsenic endemic areas compared to the reference site. Further, DA and 5-HT were slightly reduced in the brains of muskrats from the arsenic endemic areas compared to the reference location. In general, no statistically significant neurotransmission changes and differences were observed in the brain tissues of muskrats and squirrels from both arsenic endemic areas and non-endemic sites. Although MRI results showed that the brain volumes of squirrels and muskrats were not statistically different between sites after multiple comparison correction; it was noted that core brain regions were substantially affected in muskrats, in particular the hippocampal memory circuit, striatum and thalamus. Squirrel brains showed more extensive neuroanatomical changes, likely due to their relatively smaller body mass, with extensive shrinkage of the core brain structures, and the cortex, even after accounting for differences in overall brain size. The results of this present study constitute the first observation of neuroanatomical changes in wild small mammal species breeding in arsenic endemic areas of Canada.
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Affiliation(s)
- S Amuno
- School of Environment and Sustainability, University of Saskatchewan, Saskatoon, Canada.
| | - D A Rudko
- Department of Neurology/Neurosurgery, McGill University, Montreal, Canada; Department of Biomedical Engineering, McGill University, Montreal, Canada
| | - D Gallino
- Computational Brain Anatomy Laboratory, Cerebral Imaging Centre, Douglas Mental Health University Institute, McGill University, Montreal, Canada
| | - M Tuznik
- Department of Neurology/Neurosurgery, McGill University, Montreal, Canada
| | - K Shekh
- Department of Biology, University of Saskatchewan, Saskatoon, Canada; Toxicology Centre, University of Saskatchewan, Saskatoon, Canada
| | - V Kodzhahinchev
- Department of Biology, University of Saskatchewan, Saskatoon, Canada
| | - S Niyogi
- Department of Biology, University of Saskatchewan, Saskatoon, Canada; Toxicology Centre, University of Saskatchewan, Saskatoon, Canada
| | - M M Chakravarty
- Department of Biomedical Engineering, McGill University, Montreal, Canada; Computational Brain Anatomy Laboratory, Cerebral Imaging Centre, Douglas Mental Health University Institute, McGill University, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada
| | - G A Devenyi
- Computational Brain Anatomy Laboratory, Cerebral Imaging Centre, Douglas Mental Health University Institute, McGill University, Montreal, Canada; Department of Psychiatry, McGill University, Montreal, Canada
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17
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Bai L, Tang Q, Zou Z, Meng P, Tu B, Xia Y, Cheng S, Zhang L, Yang K, Mu S, Wang X, Qin X, Lv B, Cao X, Qin Q, Jiang X, Chen C. m6A Demethylase FTO Regulates Dopaminergic Neurotransmission Deficits Caused by Arsenite. Toxicol Sci 2019; 165:431-446. [PMID: 29982692 DOI: 10.1093/toxsci/kfy172] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Arsenite exposure is known to increase the risk of neurological disorders via alteration of dopamine content, but the detailed molecular mechanisms remain largely unknown. In this study, using both dopaminergic neurons of the PC-12 cell line and C57BL/6J mice as in vitro and in vivo models, our results demonstrated that 6 months of arsenite exposure via drinking water caused significant learning and memory impairment, anxiety-like behavior and alterations in conditioned avoidance and escape responses in male adult mice. We also were the first to reveal that the reduction in dopamine content induced by arsenite mainly resulted from deficits in dopaminergic neurotransmission in the synaptic cleft. The reversible N6- methyladenosine (m6A) modification is a novel epigenetic marker with broad roles in fundamental biological processes. We further evaluated the effect of arsenite on the m6A modification and tested if regulation of the m6A modification by demethylase fat mass and obesity-associated (FTO) could affect dopaminergic neurotransmission. Our data demonstrated for the first time that arsenite remarkably increased m6A modification, and FTO possessed the ability to alleviate the deficits in dopaminergic neurotransmission in response to arsenite exposure. Our findings not only provide valuable insight into the molecular neurotoxic pathogenesis of arsenite exposure, but are also the first evidence that regulation of FTO may be considered as a novel strategy for the prevention of arsenite-associated neurological disorders.
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Affiliation(s)
- LuLu Bai
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Qianghu Tang
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Zhen Zou
- Institute of Life Sciences, Chongqing Medical University, Chongqing, People's Republic of China
| | - Pan Meng
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Baijie Tu
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Yinyin Xia
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Shuqun Cheng
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Lina Zhang
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Kai Yang
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Shaoyu Mu
- Post-doctoral Research Stations of Nursing Science, School of Nursing, Chongqing Medical University, Chongqing, People's Republic of China
| | - Xuefeng Wang
- Chongqing Key Laboratory of Neurology, Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Xia Qin
- Department of Pharmacy, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Bo Lv
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Xianqing Cao
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China
| | - Qizhong Qin
- Center of Experimental Teaching for Public Health
| | - Xuejun Jiang
- Center of Experimental Teaching for Public Health.,Laboratory of Tissue and Cell Biology, Experimental Teaching and Management Center, Chongqing Medical University, Chongqing, People's Republic of China
| | - Chengzhi Chen
- Department of Occupational and Environmental Health, School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, People's Republic of China.,Post-doctoral Research Stations of Nursing Science, School of Nursing, Chongqing Medical University, Chongqing, People's Republic of China
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18
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Myoclonic jerks complicating treatment of acute promyelocytic leukemia: case report and literature review. Blood Adv 2019; 3:1854-1857. [PMID: 31213431 DOI: 10.1182/bloodadvances.2019000249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 05/23/2019] [Indexed: 11/20/2022] Open
Abstract
Key Points
Myoclonic jerks and inattentiveness may be rare neurologic complications of ATO toxicity. Clinicians must be aware of this rare toxicity given that the ATO and ATRA combination is now standard-of-care treatment of low-risk APL.
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Babich R, Van Beneden RJ. Effect of arsenic exposure on early eye development in zebrafish (Danio rerio). J Appl Toxicol 2019; 39:824-831. [PMID: 30671985 DOI: 10.1002/jat.3770] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/19/2018] [Accepted: 12/10/2018] [Indexed: 12/19/2022]
Abstract
Arsenic is a metalloid that contaminates drinking water supplies worldwide. Owing to concerns for human health, the World Health Organization and the US Environmental Protection Agency have established a safe level in drinking water of ≤10 ppb. Recently, arsenic exposure has also been linked to lower IQ values in children. The effect of arsenic on neurogenesis, specifically eye development, has not been widely explored. This study aimed to examine the effect of environmentally relevant concentrations of arsenic on early eye development by morphological and molecular analysis. The zebrafish, Danio rerio, was chosen to model the impact of arsenic on retinogenesis because of similarities to human eye development. Arsenic exposure to zebrafish embryos resulted in a significant increase in eye diameter at 14 days postfertilization. This was coupled with a trend in thinning of the retinal pigmented epithelium (RPE) layer in embryos exposed to 500 ppb arsenic. Reverse transcription-quantitative polymerase chain reaction analysis of genes associated with eye development revealed differential expression of Pax6a, Pax2a, Ngn1, Sox2 and Shha relative to control. Pax6a, Pax2a and Sox2 are important in the formation of the RPE. Proper formation of the RPE is necessary for growth of the sclera, which, in turn, is responsible for maintaining the shape of the eye. This could potentially be explained by the disruption of gene expression under arsenic exposure during critical time points in early eye development. These results provide insight into the effects arsenic may be having on early eye development in children exposed to contaminated drinking water supplies.
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Affiliation(s)
- Remy Babich
- School of Marine Sciences, University of Maine, Orono, ME, USA
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Chandravanshi LP, Gupta R, Shukla RK. Arsenic-Induced Neurotoxicity by Dysfunctioning Cholinergic and Dopaminergic System in Brain of Developing Rats. Biol Trace Elem Res 2019; 189:118-133. [PMID: 30051311 DOI: 10.1007/s12011-018-1452-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/18/2018] [Indexed: 12/20/2022]
Abstract
Chronic exposure to arsenic via drinking water throughout the globe is assumed to cause a developmental neurotoxicity. Here, we investigated the effect of perinatal arsenic exposure on the neurobehavioral and neurochemical changes in the corpus striatum, frontal cortex, and hippocampus that is critically involved in motor and cognition functions. In continuation of previous studies, this study demonstrates that perinatal exposures (GD6-PD21) to arsenic (2 or 4 mg/kg body weight, p.o.) cause hypo-activity in arsenic-exposed rats on PD22. The hypo-activity was found to be linked with a decrease in the mRNA and protein expression of the DA-D2 receptor. Further, a protein expression of tyrosine hydroxylase (TH), levels of dopamine, and its metabolites were also significantly impaired in corpus striatum. The arsenic-exposed groups showed spatial learning and memory significantly below the average in a dose-dependent manner for the controls. Here, we evaluated the declined expression of CHRM2 receptor gene and protein expression of ChAT, PKCβ-1 in the frontal cortex and hippocampus, which are critically involved in cognition functions including learning and memory. A trend of recovery was found in the cholinergic and dopaminergic system of the brain, but changes remained persisted even after the withdrawal of arsenic exposure on PD45. Taken together, our results indicate that perinatal arsenic exposure appears to be critical and vulnerable as the development of cholinergic and dopaminergic system continues during this period.
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Affiliation(s)
- Lalit P Chandravanshi
- Division of Forensic Science, School of Basic and Applied Sciences, Galgotias University, Greater Noida, 201307, India.
- Developmental Toxicology Division, CSIR-Indian Institute of Toxicology Research, Post Box No. 80, MG Marg, Lucknow, 226 001, India.
| | - Richa Gupta
- Developmental Toxicology Division, CSIR-Indian Institute of Toxicology Research, Post Box No. 80, MG Marg, Lucknow, 226 001, India
| | - Rajendra K Shukla
- Department of Biochemistry, All India Institute of Medical Sciences, Bhopal, India
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Kassab RB, El-Hennamy RE. The role of thymoquinone as a potent antioxidant in ameliorating the neurotoxic effect of sodium arsenate in female rat. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.ejbas.2017.07.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Rami B. Kassab
- Zoology Department, Faculty of Science, Helwan University, Cairo, Egypt
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Mo TT, Dai H, Du H, Zhang RY, Chai KP, An Y, Chen JJ, Wang JK, Chen ZJ, Chen CZ, Jiang XJ, Tang R, Wang LP, Tan Q, Tang P, Miao XY, Meng P, Zhang LB, Cheng SQ, Peng B, Tu BJ, Han TL, Xia YY, Baker PN. Gas chromatography-mass spectrometry based metabolomics profile of hippocampus and cerebellum in mice after chronic arsenic exposure. ENVIRONMENTAL TOXICOLOGY 2019; 34:103-111. [PMID: 30375170 DOI: 10.1002/tox.22662] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 09/07/2018] [Accepted: 09/16/2018] [Indexed: 06/08/2023]
Abstract
Intake of arsenic (As) via drinking water has been a serious threat to global public health. Though there are numerous reports of As neurotoxicity, its pathogenesis mechanisms remain vague especially its chronic effects on metabolic network. Hippocampus is a renowned area in relation to learning and memory, whilst recently, cerebellum is argued to be involved with process of cognition. Therefore, the study aimed to explore metabolomics alternations in these two areas after chronic As exposure, with the purpose of further illustrating details of As neurotoxicity. Twelve 3-week-old male C57BL/6J mice were divided into two groups, receiving deionized drinking water (control group) or 50 mg/L of sodium arsenite (via drinking water) for 24 weeks. Learning and memory abilities were tested by Morris water maze (MWM) test. Pathological and morphological changes of hippocampus and cerebellum were captured via transmission electron microscopy (TEM). Metabolic alterations were analyzed by gas chromatography-mass spectrometry (GC-MS). MWM test confirmed impairments of learning and memory abilities of mice after chronic As exposure. Metabolomics identifications indicated that tyrosine increased and aspartic acid (Asp) decreased simultaneously in both hippocampus and cerebellum. Intermediates (succinic acid) and indirect involved components of tricarboxylic acid cycle (proline, cysteine, and alanine) were found declined in cerebellum, indicating disordered energy metabolism. Our findings suggest that these metabolite alterations are related to As-induced disorders of amino acids and energy metabolism, which might therefore, play an important part in mechanisms of As neurotoxicity.
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Affiliation(s)
- Ting-Ting Mo
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Hua Dai
- Department of Public Health, Guiyang Center for Disease Control and Prevention, Guiyang, China
| | - Hang Du
- Center of Experimental Medicine, Chongqing Municipal Hospital for Prevention and Control of Occupational Diseases, Chongqing, China
| | - Rui-Yuan Zhang
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Ke-Ping Chai
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Yao An
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Ji-Ji Chen
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Jun-Ke Wang
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Zi-Jin Chen
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Cheng-Zhi Chen
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Xue-Jun Jiang
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Rong Tang
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Li-Ping Wang
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Qiang Tan
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Ping Tang
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Xin-Yu Miao
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Pan Meng
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Long-Bin Zhang
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Shu-Qun Cheng
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Bin Peng
- Department of Statistics, School of Public Health and Management, Chongqing Medical University, Chongqing, China
| | - Bai-Jie Tu
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
| | - Ting-Li Han
- The Liggins Institute, University of Auckland, Auckland, New Zealand
- China-Canada-New Zealand Joint Laboratory of Maternal and Fetal Medicine, Chongqing Medical University, Chongqing, China
| | - Yin-Yin Xia
- School of Public Health and Management, Research Center for Medicine and Social Development, Innovation Center for Social Risk Governance in Health, Chongqing Medical University, Chongqing, China
- China-Canada-New Zealand Joint Laboratory of Maternal and Fetal Medicine, Chongqing Medical University, Chongqing, China
| | - Philip N Baker
- College of Medicine, Biological Sciences and Psychology, University of Leicester, Leicester, United Kingdom
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Kaushal P, Kumar P, Dhar P. Ameliorative role of antioxidant supplementation on sodium-arsenite induced adverse effects on the developing rat cerebellum. J Ayurveda Integr Med 2019; 11:455-463. [PMID: 30635247 PMCID: PMC7772504 DOI: 10.1016/j.jaim.2018.02.138] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 01/01/2018] [Accepted: 02/08/2018] [Indexed: 11/26/2022] Open
Abstract
Background Arsenic is an environmental contaminant of global concern. Consumption of ground water contaminated with inorganic arsenic (iAs) continues to be the major source of its exposure. The developing nervous system is especially vulnerable to environmental insults due to its higher rate of oxygen consumption and provision of weaker antioxidant (AOX) machinery. Objective Since oxidative stress has been reported as one of the major factors underlying iAs induced toxicity, the aim of the present study is to study the effect of two AOXs i.e., Alpha Lipoic Acid (ALA) and Curcumin (Cur) in developing cerebellum of rats exposed to arsenic during postnatal period. Materials and Methods The study was carried out on mother reared neonatal rat pups grouped as normal (Ia) and sham (vehicle) controls (Ib,c,d), while the experimental groups IIa/ IIb received sodium arsenite (NaAsO2) [(1.5/2.5 mg/kg body weight (bw)] alone or along with ALA (70 mg/kg bw)- IIIa/ IIIb or along with Cur (150 mg/kg bw)- IVa/ IVb. Behavioural, biochemical and immunohistochemical procedures were carried out to understand the underlying mechanisms. Results The observations indicated deficits in locomotor function, accumulation of iAs, increased levels of oxidative stress markers along with downregulation of the expression of proteins closely associated with synaptic functioning (Synaptophysin and Postsynaptic density protein95) in the cerebellum of iAs treated animals. Substantial recovery in all these parameters was observed in AOX co-treated groups. Conclusion Our results support the potential of ALA and Cur in amelioration of iAs induced developmental neurotoxicity. ALA and Cur can be proposed as dietary adjuvants amongst populations inhabiting areas with high iAs contamination as a safe and cost effective antidotes.
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Affiliation(s)
- Parul Kaushal
- Department of Anatomy, All Institute of Medical Sciences, New Delhi 110029, India
| | - Pavan Kumar
- Department of Anatomy, All Institute of Medical Sciences, New Delhi 110029, India
| | - Pushpa Dhar
- Department of Anatomy, All Institute of Medical Sciences, New Delhi 110029, India.
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Kumar A, Rahman M, Kumar R, Ali M, Niraj P, Srivastava A, Singh S, Ghosh A. Arsenic contamination in groundwater causing impaired memory and intelligence in school children of Simri village of Buxar district of Bihar. JOURNAL OF MENTAL HEALTH AND HUMAN BEHAVIOUR 2019. [DOI: 10.4103/jmhhb.jmhhb_31_18] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Sung K, Kim M, Kim H, Hwang GW, Kim K. Perinatal Exposure to Arsenic in Drinking Water Alters Glutamatergic Neurotransmission in the Striatum of C57BL/6 Mice. Biol Trace Elem Res 2019; 187:224-229. [PMID: 29748927 DOI: 10.1007/s12011-018-1374-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 05/02/2018] [Indexed: 12/15/2022]
Abstract
Although exposure to arsenic (As) induces developmental neurotoxicity, there is a lack of data regarding its specific effects on glutamatergic neurotransmission in offspring from dams exposed to As during gestation and lactation. In this study, the body weight, glutamate content, and expression of vesicular glutamate transporter 2 (VGLUT2) and metabotropic glutamate receptors mGluR2 and mGluR3 was examined in the striatum of offspring following treatment of the dams with As (10 or 100 mg/L NaAsO2 in drinking water). At postnatal day 21, body weight was decreased significantly, whereas the glutamate content in the striatum of offspring in the 100-mg/L As group were not significantly different from those in the control group. Although mGluR3 expression was not significantly different, VGLUT2 and mGluR2 expression was significantly lower in the striatum of offspring of As-exposed dams. These data indicate that altered glutamatergic neurotransmission may contribute to As-induced developmental neurotoxic effects.
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Affiliation(s)
- Kyunghwa Sung
- Collage of Pharmacy, Keimyung University, Daegu, 42601, Republic of Korea
| | - Minjeong Kim
- Collage of Pharmacy, Ewha Woman's University, Seoul, 03760, Republic of Korea
| | - Haesoo Kim
- Collage of Pharmacy, Keimyung University, Daegu, 42601, Republic of Korea
| | - Gi-Wook Hwang
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, 980-8578, Japan
| | - Kisok Kim
- Collage of Pharmacy, Keimyung University, Daegu, 42601, Republic of Korea.
- Laboratory of Molecular and Biochemical Toxicology, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, 980-8578, Japan.
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Hunt PR, Olejnik N, Bailey KD, Vaught CA, Sprando RL. C. elegans Development and Activity Test detects mammalian developmental neurotoxins. Food Chem Toxicol 2018; 121:583-592. [DOI: 10.1016/j.fct.2018.09.061] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 08/29/2018] [Accepted: 09/24/2018] [Indexed: 12/14/2022]
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Serrazina DC, Lopes De Andrade V, Cota M, Mateus ML, Aschner M, Dos Santos APM. Biomarkers of exposure and effect in a working population exposed to lead, manganese and arsenic. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2018; 81:983-997. [PMID: 30296394 DOI: 10.1080/15287394.2018.1509408] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Lead (Pb), manganese (Mn) and arsenic (As) are among the major toxicants in mining environments. Miners are commonly and repeatedly exposed to this toxic mixture. Some adverse effects may appear at concentrations below environmental quality guidelines for individual mixture components. Further, Pb, Mn, and As induce common adverse outcomes, such as interferences in the cholinergic system and heme synthesis. It is thus vital to monitor miners through biomarkers (BM), such that subclinical effects may be identified at an early stage. The main objectives of this study were to evaluate the exposure of a mining population to these three metals and determine alterations in cholinergic and heme synthesis parameters. Blood and urine samples of workers (n = 60) were obtained from a Portuguese mining industry and compared with a control population (n = 80). The levels of the metals were determined in biological samples, as well as urinary heme precursor levels, delta aminolevulinic acid (ALA) and porphyrins, and blood acetylcholinesterase (AChE) activity. The miners exhibited significantly higher values of Pb and As in blood and urine compared to control. In the case of Mn near or slightly higher than limit values were found. Our data show that heme precursors may be used simultaneously with metal levels as BMs for multiple metal exposures on an individual basis, resulting in 94.3% and 95.7% accuracy, respectively, in blood and urine, for subjects correctly identified with respect to occupation. This study also revealed that biological monitoring of this working population regarding metal body burden and heme precursor accumulation is advisable.
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Affiliation(s)
- Daniela C Serrazina
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy , Universidade de Lisboa , Lisbon , Portugal
- b Faculdade de Ciências , Universidade de Lisboa , Lisboa, Portugal
| | - Vanda Lopes De Andrade
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy , Universidade de Lisboa , Lisbon , Portugal
| | - Madalena Cota
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy , Universidade de Lisboa , Lisbon , Portugal
- b Faculdade de Ciências , Universidade de Lisboa , Lisboa, Portugal
| | - Maria Luísa Mateus
- a Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy , Universidade de Lisboa , Lisbon , Portugal
| | - Michael Aschner
- c Department of Molecular Pharmacology , Albert Einstein College of Medicine , Bronx , NY , USA
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González-Salinas S, Medina AC, Alvarado-Ortiz E, Antaramian A, Quirarte GL, Prado-Alcalá RA. Retrieval of Inhibitory Avoidance Memory Induces Differential Transcription of arc in Striatum, Hippocampus, and Amygdala. Neuroscience 2018; 382:48-58. [PMID: 29723575 DOI: 10.1016/j.neuroscience.2018.04.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/27/2018] [Accepted: 04/20/2018] [Indexed: 12/29/2022]
Abstract
Similar to the hippocampus and amygdala, the dorsal striatum is involved in memory retrieval of inhibitory avoidance, a task commonly used to study memory processes. It has been reported that memory retrieval of fear conditioning regulates gene expression of arc and zif268 in the amygdala and the hippocampus, and it is surprising that only limited effort has been made to study the molecular events caused by retrieval in the striatum. To further explore the involvement of immediate early genes in retrieval, we used real-time PCR to analyze arc and zif268 transcription in dorsal striatum, dorsal hippocampus, and amygdala at different time intervals after retrieval of step-through inhibitory avoidance memory. We found that arc expression in the striatum increased 30 min after retrieval while no changes were observed in zif268 in this region. Expression of arc and zif268 also increased in the dorsal hippocampus but the changes were attributed to context re-exposure. Control procedures indicated that in the amygdala, arc and zif268 expression was not dependent on retrieval. Our data indicate that memory retrieval of inhibitory avoidance induces arc gene expression in the dorsal striatum, caused, very likely, by the instrumental component of the task. Striatal arc expression after retrieval may induce structural and functional changes in the neurons involved in this process.
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Affiliation(s)
- Sofía González-Salinas
- Escuela Superior Tepeji del Río, Universidad Autónoma del Estado de Hidalgo, Tepeji del Río, Hidalgo 42850, México.
| | - Andrea C Medina
- Laboratorio de Aprendizaje y Memoria, Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus Juriquilla, Querétaro, Querétaro 76230, México.
| | - Eduardo Alvarado-Ortiz
- Laboratorio de Aprendizaje y Memoria, Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus Juriquilla, Querétaro, Querétaro 76230, México.
| | - Anaid Antaramian
- Unidad de Proteogenómica, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus Juriquilla, Querétaro, Querétaro 76230, México.
| | - Gina L Quirarte
- Laboratorio de Aprendizaje y Memoria, Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus Juriquilla, Querétaro, Querétaro 76230, México.
| | - Roberto A Prado-Alcalá
- Laboratorio de Aprendizaje y Memoria, Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Campus Juriquilla, Querétaro, Querétaro 76230, México.
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Mónaco NM, Bartos M, Dominguez S, Gallegos C, Bras C, Esandi MDC, Bouzat C, Giannuzzi L, Minetti A, Gumilar F. Low arsenic concentrations impair memory in rat offpring exposed during pregnancy and lactation: Role of α7 nicotinic receptor, glutamate and oxidative stress. Neurotoxicology 2018; 67:37-45. [DOI: 10.1016/j.neuro.2018.04.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 04/09/2018] [Accepted: 04/15/2018] [Indexed: 10/17/2022]
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Desai G, Barg G, Queirolo EI, Vahter M, Peregalli F, Mañay N, Kordas K. A cross-sectional study of general cognitive abilities among Uruguayan school children with low-level arsenic exposure, potential effect modification by methylation capacity and dietary folate. ENVIRONMENTAL RESEARCH 2018; 164:124-131. [PMID: 29486343 PMCID: PMC5911190 DOI: 10.1016/j.envres.2018.02.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 02/13/2018] [Accepted: 02/14/2018] [Indexed: 05/27/2023]
Abstract
BACKGROUND Few studies have evaluated the association between low-level arsenic (As) exposure and cognitive performance among children. OBJECTIVES In this cross-sectional study, we assessed the association between low-level As exposure and cognitive performance among 5-8 year-old children in Montevideo, and tested effect modification by As methylation capacity and children's dietary folate intake. METHODS We measured total urinary As (UAs) concentrations and the proportion of monomethylarsonic acid (MMA) in the urine of 328 children. Seven subtests of the standardized Woodcock-Muñoz cognitive battery were used to assess cognitive performance, from which, the general intellectual abilities (GIA) score was derived. Total folate intake was estimated from two 24-h dietary recalls. Linear regression analyses were performed. Effect modification was assessed by stratifying at the median %MMA value and tertiles of total folate intake calculated as micrograms (µg) of dietary folate equivalents (dfe). RESULTS The median UAs was 11.9 µg/l (range = 1.4-93.9), mean folate intake was 337.4 (SD = 123.3) µg dfe, and median %MMA was 9.42 (range = 2.6-24.8). There was no association between UAs and cognitive abilities, and no consistent effect modification by %MMA. UAs was associated inversely with concept formation, and positively with cognitive efficiency and numbers reversed subtest in the lowest folate intake tertile; UAs was also positively associated with sound integration in the second tertile and concept formation in the highest tertile of folate intake. There was no consistent pattern of effect modification by %MMA or folate intake. CONCLUSION There was no association between low-level As exposure and general cognitive abilities.
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Affiliation(s)
- Gauri Desai
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, The State University of New York (SUNY) at Buffalo, NY, USA.
| | - Gabriel Barg
- Department of Neurocognition, Catholic University of Uruguay, Montevideo, Uruguay
| | - Elena I Queirolo
- Center for Research, Catholic University of Uruguay, Montevideo, Uruguay
| | | | - Fabiana Peregalli
- Center for Research, Catholic University of Uruguay, Montevideo, Uruguay
| | - Nelly Mañay
- Faculty of Chemistry, University of the Republic of Uruguay, Montevideo, Uruguay
| | - Katarzyna Kordas
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, The State University of New York (SUNY) at Buffalo, NY, USA
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Niño SA, Martel-Gallegos G, Castro-Zavala A, Ortega-Berlanga B, Delgado JM, Hernández-Mendoza H, Romero-Guzmán E, Ríos-Lugo J, Rosales-Mendoza S, Jiménez-Capdeville ME, Zarazúa S. Chronic Arsenic Exposure Increases Aβ (1-42) Production and Receptor for Advanced Glycation End Products Expression in Rat Brain. Chem Res Toxicol 2017; 31:13-21. [PMID: 29155576 DOI: 10.1021/acs.chemrestox.7b00215] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Chronic arsenic exposure during development is associated with alterations of chemical transmission and demyelination, which result in cognitive deficits and peripheral neuropathies. At the cellular level, arsenic toxicity involves increased generation of reactive species that induce severe cellular alterations such as DNA fragmentation, apoptosis, and lipid peroxidation. It has been proposed that arsenic-associated neurodegeneration could evolve to Alzheimer disease in later life.1,2 In this study, the effects of chronic exposure to inorganic arsenic (3 ppm by drinking water) in Wistar rats on the production and elimination of Amyloid-β (Aβ) were evaluated. Male Wistar rats were exposed to 3 ppm of arsenic in drinking water from fetal development until 4 months of age. After behavioral deficits induced by arsenic exposure through contextual fear conditioning were verified, the brains were collected for the determination of total arsenic by inductively coupled plasma-mass spectrometry, the levels of amyloid precursor protein and receptor for advanced glycation end products (RAGE) by Western blot analysis as well as their transcript levels by RT-qPCR, Aβ(1-42) estimation by ELISA assay and the enzymatic activity of β-secretase (BACE1). Our results demonstrate that chronic arsenic exposure induces behavioral deficits accompanied of higher levels of soluble and membranal RAGE and the increase of Aβ(1-42) cleaved. In addition, BACE1 enzymatic activity was increased, while immunoblot assays showed no differences in the low-density lipoprotein receptor-related protein 1 (LRP1) receptor among groups. These results provide evidence of the effects of arsenic exposure on the production of Aβ(1-42) and cerebral amyloid clearance through RAGE in an in vivo model that displays behavioral alterations. This work supports the hypothesis that early exposure to metals may contribute to neurodegeneration associated with amyloid accumulation.
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Affiliation(s)
| | | | | | | | | | - Héctor Hernández-Mendoza
- Laboratorio Nacional Forense Nuclear, Instituto Nacional de Investigaciones Nucleares , Carretera México-Toluca s/n, CP 52750 La Marquesa Ocoyoacac, México.,Centro de Biociencias, Universidad Autónoma de San Luis Potosí , Km. 14.5 carretera San Luis Potosí - Matehuala, Ejido "Palma de la Cruz", CP 78321 Soledad de Graciano Sánchez, San Luis Potosí, México
| | - Elizabeth Romero-Guzmán
- Laboratorio Nacional Forense Nuclear, Instituto Nacional de Investigaciones Nucleares , Carretera México-Toluca s/n, CP 52750 La Marquesa Ocoyoacac, México
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Hsieh RL, Su CT, Shiue HS, Chen WJ, Huang SR, Lin YC, Lin MI, Mu SC, Chen RJ, Hsueh YM. Relation of polymorphism of arsenic metabolism genes to arsenic methylation capacity and developmental delay in preschool children in Taiwan. Toxicol Appl Pharmacol 2017; 321:37-47. [DOI: 10.1016/j.taap.2017.02.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 02/17/2017] [Accepted: 02/20/2017] [Indexed: 11/15/2022]
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Masuda T, Ishii K, Seto Y, Hosoya T, Tanaka R, Nakayama T, Iwasaki N, Shibata Y, Tamaoka A. Long-term accumulation of diphenylarsinic acid in the central nervous system of cynomolgus monkeys. Arch Toxicol 2017; 91:2799-2812. [PMID: 28120037 PMCID: PMC5515954 DOI: 10.1007/s00204-016-1928-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 12/20/2016] [Indexed: 11/25/2022]
Abstract
Diphenylarsinic acid (DPAA) is an organic arsenic compound used for the synthesis of chemical weapons. We previously found that the residents of Kamisu city in Ibaraki Prefecture, Japan, were exposed to DPAA through contaminated well water in 2003. Although mounting evidence strongly suggests that their neurological symptoms were caused by DPAA, the dynamics of DPAA distribution and metabolism after ingestion by humans remain to be elucidated. To accurately predict the distribution of DPAA in the human body, we administrated DPAA (1.0 mg/kg/day) to cynomolgus monkeys (n = 28) for 28 days. The whole tissues from these monkeys were collected at 5, 29, 170, and 339 days after the last administration. The concentration of DPAA in these tissues was measured by liquid chromatography-mass spectrometry. We found that DPAA accumulated in the central nervous system tissues for a longer period than in other tissues. This finding would extend our knowledge on the distribution dynamics and metabolism of DPAA in primates, including humans. Furthermore, it may be useful for developing a treatment strategy for patients who are exposed to DPAA.
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Affiliation(s)
- Tomoyuki Masuda
- Department of Neurology, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan.,Doctoral and Master's Programs in Kansei, Behavioral and Brain Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, 305-8577, Japan.,Department of Neurobiology, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8577, Japan
| | - Kazuhiro Ishii
- Department of Neurology, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan.
| | - Yasuo Seto
- Third Department of Forensic Science, National Research Institute of Police Science, Chiba, 277-0882, Japan
| | - Tomoko Hosoya
- Department of Neurology, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Ryuta Tanaka
- Department of Child Health, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Tomohiro Nakayama
- Department of Pediatrics, Ibaraki Prefectural University of Health Sciences, Ibaraki, 300-0331, Japan
| | - Nobuaki Iwasaki
- Department of Pediatrics, Ibaraki Prefectural University of Health Sciences, Ibaraki, 300-0331, Japan
| | - Yasuyuki Shibata
- Center for Environmental Measurement and Analysis, National Institute for Environmental Studies, Ibaraki, 305-8506, Japan
| | - Akira Tamaoka
- Department of Neurology, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
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Srivastava P, Dhuriya YK, Gupta R, Shukla RK, Yadav RS, Dwivedi HN, Pant AB, Khanna VK. Protective Effect of Curcumin by Modulating BDNF/DARPP32/CREB in Arsenic-Induced Alterations in Dopaminergic Signaling in Rat Corpus Striatum. Mol Neurobiol 2016; 55:445-461. [DOI: 10.1007/s12035-016-0288-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 11/02/2016] [Indexed: 01/04/2023]
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Hallauer J, Geng X, Yang HC, Shen J, Tsai KJ, Liu Z. The Effect of Chronic Arsenic Exposure in Zebrafish. Zebrafish 2016; 13:405-12. [PMID: 27140519 PMCID: PMC5035366 DOI: 10.1089/zeb.2016.1252] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Arsenic is a prevalent environmental toxin and a Group one human carcinogenic agent. Chronic arsenic exposure has been associated with many human diseases. The aim of this study is to evaluate zebrafish as an animal model to assess arsenic toxicity in elevated long-term arsenic exposure. With prolonged exposure (6 months) to various concentrations of arsenic from 50 ppb to 300 ppb, effects of arsenic accumulation in zebrafish tissues, and phenotypes were investigated. Results showed that there are no significant changes of arsenic retention in zebrafish tissues, and zebrafish did not exhibit any visible tumor formation under arsenic exposure conditions. However, the zebrafish demonstrate a dysfunction in their neurological system, which is reflected by a reduction of locomotive activity. Moreover, elevated levels of the superoxide dismutase (SOD2) protein were detected in the eye and liver, suggesting increased oxidative stress. In addition, the progenies of arsenic-treated parents displayed a smaller biomass (four-fold reduction in body weight) compared with those from their parental controls. This result indicates that arsenic may induce genetic or epigenetic changes that are then passed on to the next generation. Overall, this study demonstrates that zebrafish is a convenient vertebrate model with advantages in the evaluation of arsenic-associated neurological disorders as well as its influences on the offspring.
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Affiliation(s)
- Janell Hallauer
- Department of Biological Sciences, Oakland University, Rochester, Michigan
| | - Xiangrong Geng
- Department of Biological Sciences, Oakland University, Rochester, Michigan
| | - Hung-Chi Yang
- Healthy Aging Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Jian Shen
- Department of Pathology, Creighton University School of Medicine, Omaha, Nebraska
| | - Kan-Jen Tsai
- School of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung, Taiwan
| | - Zijuan Liu
- Department of Biological Sciences, Oakland University, Rochester, Michigan
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Chronic Exposure to Arsenic in Drinking Water Causes Alterations in Locomotor Activity and Decreases Striatal mRNA for the D2 Dopamine Receptor in CD1 Male Mice. J Toxicol 2016; 2016:4763434. [PMID: 27375740 PMCID: PMC4916309 DOI: 10.1155/2016/4763434] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 05/15/2016] [Indexed: 01/11/2023] Open
Abstract
Arsenic exposure has been associated with sensory, motor, memory, and learning alterations in humans and alterations in locomotor activity, behavioral tasks, and neurotransmitters systems in rodents. In this study, CD1 mice were exposed to 0.5 or 5.0 mg As/L of drinking water for 6 months. Locomotor activity, aggression, interspecific behavior and physical appearance, monoamines levels, and expression of the messenger for dopamine receptors D1 and D2 were assessed. Arsenic exposure produced hypoactivity at six months and other behaviors such as rearing and on-wall rearing and barbering showed both increases and decreases. No alterations on aggressive behavior or monoamines levels in striatum or frontal cortex were observed. A significant decrease in the expression of mRNA for D2 receptors was found in striatum of mice exposed to 5.0 mg As/L. This study provides evidence for the use of dopamine receptor D2 as potential target of arsenic toxicity in the dopaminergic system.
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Chauhan PS, Misra UK, Kalita J, Chandravanshi LP, Khanna VK. Memory and learning seems to be related to cholinergic dysfunction in the JE rat model. Physiol Behav 2016; 156:148-55. [DOI: 10.1016/j.physbeh.2016.01.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Revised: 10/12/2015] [Accepted: 01/09/2016] [Indexed: 10/22/2022]
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Prakash C, Soni M, Kumar V. Mitochondrial oxidative stress and dysfunction in arsenic neurotoxicity: A review. J Appl Toxicol 2015; 36:179-88. [DOI: 10.1002/jat.3256] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 09/01/2015] [Accepted: 09/28/2015] [Indexed: 01/19/2023]
Affiliation(s)
- Chandra Prakash
- Department of Biochemistry; Maharshi Dayanand University; Rohtak 124001 Haryana India
| | - Manisha Soni
- Department of Biochemistry; Maharshi Dayanand University; Rohtak 124001 Haryana India
| | - Vijay Kumar
- Department of Biochemistry; Maharshi Dayanand University; Rohtak 124001 Haryana India
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Rahman M, Sohel N, Hore SK, Yunus M, Bhuiya A, Streatfield PK. Prenatal arsenic exposure and drowning among children in Bangladesh. Glob Health Action 2015; 8:28702. [PMID: 26511679 PMCID: PMC4624574 DOI: 10.3402/gha.v8.28702] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 09/25/2015] [Accepted: 09/26/2015] [Indexed: 01/10/2023] Open
Abstract
There is increasing concern regarding adverse effects of prenatal arsenic exposure on the neurodevelopment of children. We analyzed mortality data for children, who were born to 11,414 pregnant women between 2002 and 2004, with an average age of 5 years of follow-up. Individual drinking-water arsenic exposure during pregnancy was calculated using tubewell water arsenic concentration between last menstrual period and date of birth. There were 84 drowning deaths registered, with cause of death ascertained using verbal autopsy (International Classification of Diseases, 10th revision, codes X65–X70). The prenatal water arsenic exposure distribution was tertiled, and the risk of drowning mortality was estimated by Cox proportional hazard models, adjusted for potential confounders. We observed a significant association between prenatal arsenic exposure and drowning in children aged 1–5 years in the highest exposure tertile (HR=1.74, 95% CI: 1.03–2.94). This study showed that in utero arsenic exposure might be associated with excess mortality among children aged 1–5 years due to drowning.
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Affiliation(s)
| | - Nazmul Sohel
- Department of Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada
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Andrade VL, Mateus ML, Batoréu MC, Aschner M, Marreilha dos Santos AP. Lead, Arsenic, and Manganese Metal Mixture Exposures: Focus on Biomarkers of Effect. Biol Trace Elem Res 2015; 166:13-23. [PMID: 25693681 PMCID: PMC4470849 DOI: 10.1007/s12011-015-0267-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 02/04/2015] [Indexed: 10/24/2022]
Abstract
The increasing exposure of human populations to excessive levels of metals continues to represent a matter of public health concern. Several biomarkers have been studied and proposed for the detection of adverse health effects induced by lead (Pb), arsenic (As), and manganese (Mn); however, these studies have relied on exposures to each single metal, which fails to replicate real-life exposure scenarios. These three metals are commonly detected in different environmental, occupational, and food contexts and they share common neurotoxic effects, which are progressive and once clinically apparent may be irreversible. Thus, chronic exposure to low levels of a mixture of these metals may represent an additive risk of toxicity. Building upon their shared mechanisms of toxicity, such as oxidative stress, interference with neurotransmitters, and effects on the hematopoietic system, we address putative biomarkers, which may assist in assessing the onset of neurological diseases associated with exposure to this metal mixture.
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Affiliation(s)
- VL Andrade
- Instituto de Investigação do Medicamento, iMed.UL, Faculdade de Farmácia, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - ML Mateus
- Instituto de Investigação do Medicamento, iMed.UL, Faculdade de Farmácia, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - MC Batoréu
- Instituto de Investigação do Medicamento, iMed.UL, Faculdade de Farmácia, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - M Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, 10461 NY, USA
| | - AP Marreilha dos Santos
- Instituto de Investigação do Medicamento, iMed.UL, Faculdade de Farmácia, Universidade de Lisboa, 1649-003 Lisboa, Portugal
- Corresponding author – , Tel – 351217946400, Fax - 351217946470
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Gumilar F, Lencinas I, Bras C, Giannuzzi L, Minetti A. Locomotor activity and sensory – motor developmental alterations in rat offspring exposed to arsenic prenatally and via lactation. Neurotoxicol Teratol 2015; 49:1-9. [DOI: 10.1016/j.ntt.2015.02.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 02/12/2015] [Accepted: 02/18/2015] [Indexed: 12/18/2022]
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42
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Huo T, Zhang Y, Li W, Yang H, Jiang H, Sun G. Effect of realgar on extracellular amino acid neurotransmitters in hippocampal CA1 region determined by online microdialysis–dansyl chloride derivatization–high-performance liquid chromatography and fluorescence detection. Biomed Chromatogr 2015; 28:1254-62. [PMID: 25237708 DOI: 10.1002/bmc.3154] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
An online microdialysis (MD)–dansyl chloride (Dns) derivatization–high-performance liquid chromatography (HPLC) and fluorescence detection (FD) system was developed for simultaneous determination of eight extracellular amino acid neurotransmitters in hippocampus. The MD probe was implanted in hippocampal CA1 region. Dialysate and Dns were online mixed and derivatized. The derivatives were separated on an ODS column and detected by FD. The developed online system showed good linearity, precision, accuracy and recovery. This online MD-HPLC system was applied to monitor amino acid neurotransmitters levels in rats exposed to realgar (0.3, 0.9 and 2.7 g/kg body weight). The result shows that glutamate concentrations were significantly increased (p<0.05) in hippocampal CA1 region of rats exposed to three doses of realgar. A decrease in γ-aminobutyric acid concentrations was found in rats exposed to medium and high doses of realgar (p<0.05). Elevation of excitotoxic index (EI) values in hippocampal CA1 region of realgar-exposed rats was observed (p<0.05). Positive correlation was found between EI values and arsenic contents in hippocampus of realgar-exposed rats, which indicates that the change in extracellular EI values is associated with arsenic accumulation in hippocampus. The developed online MD–Dns derivatization–HPLC–FD system provides a new experimental method for studying the effect of toxic Chinese medicines on amino acid neurotransmitters.
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Rodríguez-Barranco M, Gil F, Hernández AF, Alguacil J, Lorca A, Mendoza R, Gómez I, Molina-Villalba I, González-Alzaga B, Aguilar-Garduño C, Rohlman DS, Lacasaña M. Postnatal arsenic exposure and attention impairment in school children. Cortex 2015; 74:370-82. [PMID: 25682472 DOI: 10.1016/j.cortex.2014.12.018] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 11/10/2014] [Accepted: 12/17/2014] [Indexed: 12/18/2022]
Abstract
Over the last few decades there has been an increased concern about the health risks from exposure to metallic trace elements, including arsenic, because of their potential neurotoxic effects on the developing brain. This study assessed whether urinary arsenic (UA) levels are associated with attention performance and Attention-Deficit/Hyperactivity Disorder (ADHD) in children living in an area with high industrial and mining activities in Southwestern Spain. A cross-sectional study was conducted on 261 children aged 6-9 years. Arsenic levels were determined in urine samples. Attention was measured by using 4 independent tools: a) tests from the Behavioral Assessment and Research System (BARS) designed to measure attention function: Simple Reaction Time Test (RTT), Continuous Performance Test (CPT) and Selective Attention Test (SAT); b) AULA Test, a virtual reality (VR)-based test that evaluates children's response to several stimuli in an environment simulating a classroom; c) Child Behavior Checklist (CBCL), administered to parents; and d) Teacher's Report Form (TRF), administered to teachers. Multivariate linear and logistic regression models, adjusted for potential confounders, were used to estimate the magnitude of the association between UA levels and attention performance scores. Higher UA levels were associated with an increased latency of response in RTT (β = 12.3; 95% confidence interval (CI): 3.5-21.1) and SAT (β = 3.6; 95% CI: .4-6.8) as well as with worse performance on selective and focalized attention in the AULA test (β for impulsivity = .6; 95% CI: .1-1.1; β for inattention = .5; 95% CI: .03-1.0). A dose-response relationship was observed between UA levels and inattention and impulsivity scores. In contrast, results from the CBCL and TRF tests failed to show a significant association with UA levels. In conclusion, UA levels were associated with impaired attention/cognitive function, even at levels considered safe. These results provide additional evidence that postnatal arsenic exposure impairs neurological function in children.
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Affiliation(s)
- Miguel Rodríguez-Barranco
- Andalusian School of Public Health (EASP), Granada, Spain; Instituto de Investigación Biosanitaria (ibs), Granada, University Hospitals of Granada/University of Granada, Granada, Spain
| | - Fernando Gil
- Department of Legal Medicine and Toxicology, University of Granada School of Medicine, Granada, Spain
| | - Antonio F Hernández
- Department of Legal Medicine and Toxicology, University of Granada School of Medicine, Granada, Spain.
| | - Juan Alguacil
- Research Center on Health and Environment (CYSMA), University of Huelva, Huelva, Spain; CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | - Andres Lorca
- Department of Clinical, Experimental and Social Psychology, University of Huelva, Huelva, Spain
| | - Ramón Mendoza
- Department of Developmental and Educational Psychology, University of Huelva, Huelva, Spain
| | | | - Isabel Molina-Villalba
- Department of Legal Medicine and Toxicology, University of Granada School of Medicine, Granada, Spain
| | - Beatriz González-Alzaga
- Andalusian School of Public Health (EASP), Granada, Spain; Instituto de Investigación Biosanitaria (ibs), Granada, University Hospitals of Granada/University of Granada, Granada, Spain
| | | | - Diane S Rohlman
- Department of Occupational and Environmental Health, University of Iowa, Iowa City, IA, USA; Oregon Institute for Occupational Health Sciences, Oregon Health & Science University, Portland, OR, USA
| | - Marina Lacasaña
- Andalusian School of Public Health (EASP), Granada, Spain; Instituto de Investigación Biosanitaria (ibs), Granada, University Hospitals of Granada/University of Granada, Granada, Spain; CIBER of Epidemiology and Public Health (CIBERESP), Madrid, Spain
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44
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Yang Q, Chen H, Li B. Source identification and health risk assessment of metals in indoor dust in the vicinity of phosphorus mining, Guizhou Province, China. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2015; 68:20-30. [PMID: 25038721 DOI: 10.1007/s00244-014-0064-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 06/17/2014] [Indexed: 06/03/2023]
Abstract
An investigation was performed to identify the sources of arsenic (As) and heavy metals in house dust and to assess the associated human health risks in the vicinity of phosphorus (P) mining in Guizhou, China. The concentrations and spatial distributions of mercury (Hg), As, cadmium (Cd), lead (Pb), iron (Fe), copper (Cu), manganese (Mn), and P in 23 house dust samples from the study area were determined. Greater concentrations of As and Pb were found compared with values in other investigations in various countries. Pollution sources were identified using multivariate statistical analysis. As, Pb, Mn, and Hg pollution was mainly attributed to mining activities, and Mn and Cd levels were largely associated with automobile emissions. The dominant wind direction and the distance of the residence from the mining region were found to play an important role in element distributions. A health risk assessment showed that As and Pb should be paid more attention, although the noncancer risks of the studied elements were within the safe range and the cancer risks of As and Cd are within the acceptable range under present conditions.
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Affiliation(s)
- Qin Yang
- College of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400030, People's Republic of China
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45
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Changes in rat urinary porphyrin profiles predict the magnitude of the neurotoxic effects induced by a mixture of lead, arsenic and manganese. Neurotoxicology 2014; 45:168-77. [DOI: 10.1016/j.neuro.2014.10.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 10/21/2014] [Accepted: 10/21/2014] [Indexed: 12/19/2022]
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46
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Kim M, Seo S, Sung K, Kim K. Arsenic exposure in drinking water alters the dopamine system in the brains of C57BL/6 mice. Biol Trace Elem Res 2014; 162:175-80. [PMID: 25319007 DOI: 10.1007/s12011-014-0145-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 10/02/2014] [Indexed: 10/24/2022]
Abstract
Although exposure to arsenic (As) induces neurotoxic changes, there is a lack of data regarding its specific effects on neurotransmission, particularly dopaminergic neurotransmission. In this study, the dopamine content and expression of tyrosine hydroxylase (TH) and dopamine receptors (DRs) were examined in the striatum and cerebral cortex of the mouse brain following the administration of As (1-100 mg/L NaAsO2 in drinking water). After 3 weeks, significantly decreased TH expression and dopamine content, both in the striatum and the cerebral cortex of mice treated with 100 mg/L As, were observed when compared with controls. Although DR expression was similar in the cerebral cortex of As-treated mice, DRD1 to DRD4 expression significantly increased in the striatum of 100 mg/L As-exposed mice. These data indicate that altered dopaminergic neurotransmission may contribute to As-induced neurotoxic effects.
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Affiliation(s)
- Minjeong Kim
- College of Pharmacy, Keimyung University, Daegu, 704-701, Republic of Korea
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47
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Sárközi K, Horváth E, Vezér T, Papp A, Paulik E. Behavioral and general effects of subacute oral arsenic exposure in rats with and without fluoride. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2014; 25:418-431. [PMID: 25260113 DOI: 10.1080/09603123.2014.958138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Consequences of oral arsenic and fluoride exposure on motor behavior and general toxicity were modeled in young adult male rats which received sodium (meta)arsenite (10 mg/kg b.w.), sodium fluoride (5 mg/kg b.w.), and their combination by gavage, once daily, 5 days a week for 6 weeks. After 6 weeks, 6 animals per group were dissected, while the other 6 were kept for 6 more weeks untreated. Body weight, together with food and water consumption, was measured daily. Arsenic, alone or along with fluoride, caused significant decrease in rearing, and increase in immobility and local activity in the open field in the 3rd and 6th week. By the 12th week, these changes mostly diminished. Weight gain, and food and water consumption were significantly reduced by arsenic but normalized post treatment. Fluoride had no own effect and mostly no influence on effects of arsenic. Massive deposition of arsenic in the rats' blood, cerebral cortex, and liver by the 6th week, and partial elimination by the 12th week, was seen. The results underline the risk of neuro-functional damage by arsenic and call for further investigations.
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Affiliation(s)
- Kitti Sárközi
- a Department of Public Health , University of Szeged , Szeged , Hungary
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48
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Early life arsenic exposure and brain dopaminergic alterations in rats. Int J Dev Neurosci 2014; 38:91-104. [DOI: 10.1016/j.ijdevneu.2014.08.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 08/09/2014] [Accepted: 08/23/2014] [Indexed: 11/21/2022] Open
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49
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Srivastava P, Yadav RS, Chandravanshi LP, Shukla RK, Dhuriya YK, Chauhan LKS, Dwivedi HN, Pant AB, Khanna VK. Unraveling the mechanism of neuroprotection of curcumin in arsenic induced cholinergic dysfunctions in rats. Toxicol Appl Pharmacol 2014; 279:428-440. [PMID: 24952339 DOI: 10.1016/j.taap.2014.06.006] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 06/06/2014] [Accepted: 06/07/2014] [Indexed: 12/20/2022]
Abstract
Earlier, we found that arsenic induced cholinergic deficits in rat brain could be protected by curcumin. In continuation to this, the present study is focused to unravel the molecular mechanisms associated with the protective efficacy of curcumin in arsenic induced cholinergic deficits. Exposure to arsenic (20mg/kg body weight, p.o) for 28 days in rats resulted to decrease the expression of CHRM2 receptor gene associated with mitochondrial dysfunctions as evident by decrease in the mitochondrial membrane potential, activity of mitochondrial complexes and enhanced apoptosis both in the frontal cortex and hippocampus in comparison to controls. The ultrastructural images of arsenic exposed rats, assessed by transmission electron microscope, exhibited loss of myelin sheath and distorted cristae in the mitochondria both in the frontal cortex and hippocampus as compared to controls. Simultaneous treatment with arsenic (20mg/kg body weight, p.o) and curcumin (100mg/kg body weight, p.o) for 28 days in rats was found to protect arsenic induced changes in the mitochondrial membrane potential and activity of mitochondrial complexes both in frontal cortex and hippocampus. Alterations in the expression of pro- and anti-apoptotic proteins and ultrastructural damage in the frontal cortex and hippocampus following arsenic exposure were also protected in rats simultaneously treated with arsenic and curcumin. The data of the present study reveal that curcumin could protect arsenic induced cholinergic deficits by modulating the expression of pro- and anti-apoptotic proteins in the brain. More interestingly, arsenic induced functional and ultrastructural changes in the brain mitochondria were also protected by curcumin.
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Affiliation(s)
- Pranay Srivastava
- CSIR-Indian Institute of Toxicology Research, Post Box 80, MG Marg, Lucknow 226 001, India
| | - Rajesh S Yadav
- CSIR-Indian Institute of Toxicology Research, Post Box 80, MG Marg, Lucknow 226 001, India; Department of Crimnology and Forensic Science, Harisingh Gour University, Sagar 470 003, India
| | - Lalit P Chandravanshi
- CSIR-Indian Institute of Toxicology Research, Post Box 80, MG Marg, Lucknow 226 001, India
| | - Rajendra K Shukla
- CSIR-Indian Institute of Toxicology Research, Post Box 80, MG Marg, Lucknow 226 001, India
| | - Yogesh K Dhuriya
- CSIR-Indian Institute of Toxicology Research, Post Box 80, MG Marg, Lucknow 226 001, India
| | - Lalit K S Chauhan
- CSIR-Indian Institute of Toxicology Research, Post Box 80, MG Marg, Lucknow 226 001, India
| | - Hari N Dwivedi
- Babu Banarasi Das University, BBD City, Faizabad Road, Lucknow 227 015, India
| | - Aditiya B Pant
- CSIR-Indian Institute of Toxicology Research, Post Box 80, MG Marg, Lucknow 226 001, India
| | - Vinay K Khanna
- CSIR-Indian Institute of Toxicology Research, Post Box 80, MG Marg, Lucknow 226 001, India.
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Jiang S, Su J, Yao S, Zhang Y, Cao F, Wang F, Wang H, Li J, Xi S. Fluoride and arsenic exposure impairs learning and memory and decreases mGluR5 expression in the hippocampus and cortex in rats. PLoS One 2014; 9:e96041. [PMID: 24759735 PMCID: PMC3997496 DOI: 10.1371/journal.pone.0096041] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 04/02/2014] [Indexed: 11/18/2022] Open
Abstract
Fluoride and arsenic are two common inorganic contaminants in drinking water that are associated with impairment in child development and retarded intelligence. The present study was conducted to explore the effects on spatial learning, memory, glutamate levels, and group I metabotropic glutamate receptors (mGluRs) expression in the hippocampus and cortex after subchronic exposure to fluoride, arsenic, and a fluoride and arsenic combination in rats. Weaned male Sprague-Dawley rats were assigned to four groups. The control rats drank tap water. Rats in the three exposure groups drank water with sodium fluoride (120 mg/L), sodium arsenite (70 mg/L), and a sodium fluoride (120 mg/L) and sodium arsenite (70 mg/L) combination for 3 months. Spatial learning and memory was measured in Morris water maze. mGluR1 and mGluR5 mRNA and protein expression in the hippocampus and cortex was detected using RT-PCR and Western blot, respectively. Compared with controls, learning and memory ability declined in rats that were exposed to fluoride and arsenic both alone and combined. Combined fluoride and arsenic exposure did not have a more pronounced effect on spatial learning and memory compared with arsenic and fluoride exposure alone. Compared with controls, glutamate levels decreased in the hippocampus and cortex of rats exposed to fluoride and combined fluoride and arsenic, and in cortex of arsenic-exposed rats. mGluR5 mRNA and protein expressions in the hippocampus and mGluR5 protein expression in the cortex decreased in rats exposed to arsenic alone. Interestingly, compared with fluoride and arsenic exposure alone, fluoride and arsenic combination decreased mGluR5 mRNA expression in the cortex and protein expression in the hippocampus, suggesting a synergistic effect of fluoride and arsenic. These data indicate that fluoride and arsenic, either alone or combined, can decrease learning and memory ability in rats. The mechanism may be associated with changes of glutamate level and mGluR5 expression in cortex and hippocampus.
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Affiliation(s)
- Shoufang Jiang
- Department of Occupational and Environmental Health, Liaoning Provincial Key Lab of Arsenic Biological Effect and Poisoning, School of Public Health, China Medical University, Shenyang, Liaoning, P. R. China
- Department of Occupational and Environmental Health, Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, Hebei United University, Tangshan, Hebei, P. R. China
| | - Jing Su
- Department of Occupational and Environmental Health, Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, Hebei United University, Tangshan, Hebei, P. R. China
| | - Sanqiao Yao
- Department of Occupational and Environmental Health, Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, Hebei United University, Tangshan, Hebei, P. R. China
| | - Yanshu Zhang
- Department of Occupational and Environmental Health, Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, Hebei United University, Tangshan, Hebei, P. R. China
| | - Fuyuan Cao
- Laboratory Animal Center, Hebei United University, Tangshan, Hebei, P. R. China
| | - Fei Wang
- Department of Occupational and Environmental Health, Liaoning Provincial Key Lab of Arsenic Biological Effect and Poisoning, School of Public Health, China Medical University, Shenyang, Liaoning, P. R. China
| | - Huihui Wang
- Department of Occupational and Environmental Health, Liaoning Provincial Key Lab of Arsenic Biological Effect and Poisoning, School of Public Health, China Medical University, Shenyang, Liaoning, P. R. China
| | - Jun Li
- Department of Occupational and Environmental Health, Hebei Province Key Laboratory of Occupational Health and Safety for Coal Industry, School of Public Health, Hebei United University, Tangshan, Hebei, P. R. China
| | - Shuhua Xi
- Department of Occupational and Environmental Health, Liaoning Provincial Key Lab of Arsenic Biological Effect and Poisoning, School of Public Health, China Medical University, Shenyang, Liaoning, P. R. China
- * E-mail:
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