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Cheng H, Villahoz BF, Ponzio RD, Aschner M, Chen P. Signaling Pathways Involved in Manganese-Induced Neurotoxicity. Cells 2023; 12:2842. [PMID: 38132161 PMCID: PMC10742340 DOI: 10.3390/cells12242842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/07/2023] [Accepted: 12/08/2023] [Indexed: 12/23/2023] Open
Abstract
Manganese (Mn) is an essential trace element, but insufficient or excessive bodily amounts can induce neurotoxicity. Mn can directly increase neuronal insulin and activate insulin-like growth factor (IGF) receptors. As an important cofactor, Mn regulates signaling pathways involved in various enzymes. The IGF signaling pathway plays a protective role in the neurotoxicity of Mn, reducing apoptosis in neurons and motor deficits by regulating its downstream protein kinase B (Akt), mitogen-activated protein kinase (MAPK), and mammalian target of rapamycin (mTOR). In recent years, some new mechanisms related to neuroinflammation have been shown to also play an important role in Mn-induced neurotoxicity. For example, DNA-sensing receptor cyclic GMP-AMP synthase (cCAS) and its downstream signal efficient interferon gene stimulator (STING), NOD-like receptor family pyrin domain containing 3(NLRP3)-pro-caspase1, cleaves to the active form capase1 (CASP1), nuclear factor κB (NF-κB), sirtuin (SIRT), and Janus kinase (JAK) and signal transducers and activators of the transcription (STAT) signaling pathway. Moreover, autophagy, as an important downstream protein degradation pathway, determines the fate of neurons and is regulated by these upstream signals. Interestingly, the role of autophagy in Mn-induced neurotoxicity is bidirectional. This review summarizes the molecular signaling pathways of Mn-induced neurotoxicity, providing insight for further understanding of the mechanisms of Mn.
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Affiliation(s)
| | | | | | | | - Pan Chen
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; (H.C.); (B.F.V.); (R.D.P.); (M.A.)
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2
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Gomes-Silva AP, Cunha de Medeiros PD, Silva LN, Da Silva Araújo Santiago M, Perobelli JE. Exposure to manganese during sertoli cell formation and proliferation disturbs early testicular development in rats. Reprod Toxicol 2023; 120:108447. [PMID: 37499885 DOI: 10.1016/j.reprotox.2023.108447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 07/12/2023] [Accepted: 07/19/2023] [Indexed: 07/29/2023]
Abstract
Manganese (Mn) is a metal and important micronutrient. However, exposure to supraphysiological levels of Mn, which occur through fungicides, atmospheric emissions, drainages, and spills, has been related to health risks, including morphometric changes in the male reproductive organs and impairment on gametogenesis and sperm quality, impacting the fertile ability of adult animals. Despite the relevance of the fetal/perinatal period for toxicological studies on Mn, previous data only deal with the physical and neurological development of the offspring, without mentioning their reproductive development. The present study investigated whether exposure to Mn during fetal/perinatal phase, specifically during the period of formation and proliferation of Sertoli cells, impairs the reproductive development of male offspring in early postnatal life. Therefore, pregnant Wistar rats were randomly distributed into 3 experimental groups: Ctl (received saline solution), Mn-9 (received 9 mg/kg of MnCl2), and Mn-90 (received 90 mg/kg of MnCl2). The female rats received the experimental treatment by gavage from gestational day 13 to lactational day 15, i.e., postnatal day (PND) 15 of the pups. Oxidative damage to the genetic material of germ and Sertoli cells, together with a decrease in connexin 43 immunolabeling were observed in the testis of male pups evaluated at PND 15. In addition, an increase in the seminiferous tubules presenting slight epithelium vacuolization and cells with eosinophilic cytoplasm were observed, without apparent epididymal changes. In conclusion, it was demonstrated that Mn perturbed the initial testicular development by altering Sertoli cell integrity through oxidative insult, which may compromise the spermatogenesis in the long-term.
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Affiliation(s)
- Ana Priscila Gomes-Silva
- Laboratory of Experimental Toxicology - LATOEX, Universidade Federal de São Paulo, Instituto do Mar, Carvalho de Mendonça, 144, 11070-100 Santos, SP, Brazil
| | - Paloma da Cunha de Medeiros
- Laboratory of Experimental Toxicology - LATOEX, Universidade Federal de São Paulo, Instituto do Mar, Carvalho de Mendonça, 144, 11070-100 Santos, SP, Brazil
| | - Laís Nogueira Silva
- Laboratory of Experimental Toxicology - LATOEX, Universidade Federal de São Paulo, Instituto do Mar, Carvalho de Mendonça, 144, 11070-100 Santos, SP, Brazil
| | - Marcella Da Silva Araújo Santiago
- Laboratory of Experimental Toxicology - LATOEX, Universidade Federal de São Paulo, Instituto do Mar, Carvalho de Mendonça, 144, 11070-100 Santos, SP, Brazil
| | - Juliana Elaine Perobelli
- Laboratory of Experimental Toxicology - LATOEX, Universidade Federal de São Paulo, Instituto do Mar, Carvalho de Mendonça, 144, 11070-100 Santos, SP, Brazil.
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3
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Li K, Li A, Mei Y, Zhao J, Zhou Q, Li Y, Yang M, Xu Q. Trace elements and Alzheimer dementia in population-based studies: A bibliometric and meta-analysis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 318:120782. [PMID: 36464120 DOI: 10.1016/j.envpol.2022.120782] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 11/05/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
Alterations in the concentrations of trace elements may play a vital role in Alzheimer dementia progression. However, previous research results are inconsistent, and there is still a lack of review on the relationship between all the studied-trace elements and AD from various perspectives of population-based studies. In this study, we systematically reviewed previous population-based studies and identified the altered trace elements in AD patients. We searched the Web of Science Core Collection, PubMed, and Scopus database, and ultimately included 73 articles. A bibliometric analysis was conducted to explore the evolution of the field from an epidemiological perspective. Bibliometric data such as trace elements, biological materials, detection methods, cognitive tests, co-occurrence and co-citation statistics are all analyzed and presented in a quantitative manner. The 73 included studies analyzed 39 trace elements in total. In a further meta-analysis, standardized mean differences (SMDs) of 13 elements were calculated to evaluate their altered in AD patients, including copper, iron, zinc, selenium, manganese, lead, aluminum, cadmium, chromium, arsenic, mercury, cobalt, and manganese. We identified four trace elements-copper (serum), iron (plasma), zinc (hair), and selenium (plasma)-altered in AD patients, with SMDs of 0.37 (95% confidence interval [CI]: 0.10, 0.65), -0.68 (95% CI: -1.34, -0.02), -0.35 (95% CI: -0.62, -0.08), and -0.61 (95% CI: -0.97, -0.25), respectively. Finally, we formed a database of various trace element levels in AD patients and healthy controls. Our study can help future researchers gain a comprehensive understanding of the advancements in the field, and our results provide comprehensive population-based data for future research.
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Affiliation(s)
- Kai Li
- Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100005, China; Center of Environmental and Health Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100005, China
| | - Ang Li
- Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100005, China; Center of Environmental and Health Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100005, China
| | - Yayuan Mei
- Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100005, China; Center of Environmental and Health Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100005, China
| | - Jiaxin Zhao
- Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100005, China; Center of Environmental and Health Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100005, China
| | - Quan Zhou
- Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100005, China; Center of Environmental and Health Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100005, China
| | - Yanbing Li
- Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100005, China; Center of Environmental and Health Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100005, China
| | - Ming Yang
- Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100005, China; Center of Environmental and Health Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100005, China
| | - Qun Xu
- Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100005, China; Center of Environmental and Health Sciences, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 100005, China.
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Fu C, Kuang D, Zhang H, Ren J, Chen J. Different components of air pollutants and neurological disorders. Front Public Health 2022; 10:959921. [PMID: 36518583 PMCID: PMC9742385 DOI: 10.3389/fpubh.2022.959921] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 10/24/2022] [Indexed: 11/29/2022] Open
Abstract
The harmful effects of air pollution can cause various diseases. Most research on the hazards of air pollution focuses on lung and cardiovascular diseases. In contrast, the impact of air pollution on neurological disorders is not widely recognized. Air pollution can cause various neurological conditions and diseases, such as neural inflammation, neurodegeneration, and cerebrovascular barrier disorder; however, the mechanisms underlying the neurological diseases induced by various components of air pollutants remain unclear. The present paper summarizes the effects of different components of air pollutants, including particulate matter, ozone, sulfur oxides, carbon oxides, nitrogen oxides, and heavy metals, on the nervous system and describes the impact of various air pollutants on neurological disorders, providing ideas for follow-up research.
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Affiliation(s)
- Chunlia Fu
- Department of Emergency Intensive Care Unit, Affiliated Dongguan People's Hospital, Southern Medical University, Dongguan, China
| | - Daibing Kuang
- Department of Emergency Intensive Care Unit, Affiliated Dongguan People's Hospital, Southern Medical University, Dongguan, China
| | - He Zhang
- School of Public Health, Guangdong Medical University, Dongguan, China
| | - Jinxin Ren
- The Second Clinical Medical College, Guangdong Medical University, Dongguan, China
| | - Jialong Chen
- School of Public Health, Guangdong Medical University, Dongguan, China
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Cortez-Lugo M, Hernández-Bonilla D, Rodríguez-Agudelo Y, Solís-Vivanco R, Moreno-Macías H, Schilmann A, Rodríguez-Dozal S, Montes S, Rios C, Riojas-Rodríguez H. Neurocognitive function in adult residents of a mining district in Mexico after reducing manganese exposure: Follow-up after 11 years. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 848:157519. [PMID: 35872186 DOI: 10.1016/j.scitotenv.2022.157519] [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: 03/17/2022] [Revised: 07/15/2022] [Accepted: 07/16/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Little is known about the neurotoxic effects of chronic exposure to airborne Mn once exposure has been reduced. The environmentally exposed and the reference adult populations evaluated in 2002 were followed, after an environmental management program (EMP) was implemented to reduce the exposure in a mining district in Mexico. OBJECTIVE The aim of this study was to compare the association between exposure to Mn and neurocognitive performance in environmentally exposed and reference groups of adults before and after EMP implementation. METHODS In 2013, the same battery of neurocognitive tests used in the initial study (2002) was applied to 58 adults exposed to airborne Mn and 30 adults from the reference community. A cumulative exposure index (CEI) was estimated for the study population before and after the EMP. Categorical outcomes were analyzed using logistic regression, and the resulting ORs were compared between studies. Continuous outcomes were analyzed using linear regression. All models were adjusted for age, years of education, socioeconomic status and blood lead levels. RESULTS Exposed adults from the post-EMP study showed an improvement in fine motor and verbal regulation of motor skills (OR < 1) compared to the exposed adults from the pre-EMP study (OR > 1). In both pre- and post-studies, the exposed adults showed a deterioration in their dynamic organization of motor activity compared to the reference group (p < 0.05); however, they showed no significant change in attention and working-memory performance. DISCUSSION After four years of a significant reduction in airborne Mn levels resulting from EMP implementation, chronically exposed adults showed an improvement in fine motor and verbal regulation of motor skills; however, the remaining areas of their motor and cognitive functions remained impaired.
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Affiliation(s)
- M Cortez-Lugo
- Environmental Health Department, the National Institute of Public Health, Av. Universidad 655, Col. Santa María Ahucatitlán, CP 62100 Cuernavaca, Morelos, Mexico.
| | - D Hernández-Bonilla
- Environmental Health Department, the National Institute of Public Health, Av. Universidad 655, Col. Santa María Ahucatitlán, CP 62100 Cuernavaca, Morelos, Mexico.
| | - Y Rodríguez-Agudelo
- Laboratory of Neurophysiology, the National Institute of Neurology and Neurosurgery, Av. Insurgentes Sur 3877, La Fama, Tlalpan, CP 14269 Mexico City, Mexico
| | - R Solís-Vivanco
- Laboratory of Cognitive and Clinical Neurophysiology, the National Institute of Neurology and Neurosurgery, Av. Insurgentes Sur 3877, La Fama, Tlalpan, CP 14269 Mexico City, Mexico.
| | - H Moreno-Macías
- Social Science and Humanities Department, the Metropolitan Autonomous University, Calzada del Hueso 1100, Coapa, Villa Quietud, Coyoacán, CP 04960 Mexico City, Mexico.
| | - A Schilmann
- Environmental Health Department, the National Institute of Public Health, Av. Universidad 655, Col. Santa María Ahucatitlán, CP 62100 Cuernavaca, Morelos, Mexico.
| | - S Rodríguez-Dozal
- Environmental Health Department, the National Institute of Public Health, Av. Universidad 655, Col. Santa María Ahucatitlán, CP 62100 Cuernavaca, Morelos, Mexico.
| | - S Montes
- Multidisciplinary Academic Unit, the University of Tamaulipas, Zona Centro, Ciudad Victoria, Tamaulipas, CP 87000 Reynosa-Aztlán, Tamaulipas, Mexico
| | - C Rios
- Neurochemistry Department, the National Institute of Neurology and Neurosurgery, Av. Insurgentes Sur 3877, La Fama, Tlalpan, CP 14269 Mexico City, Mexico
| | - H Riojas-Rodríguez
- Environmental Health Department, the National Institute of Public Health, Av. Universidad 655, Col. Santa María Ahucatitlán, CP 62100 Cuernavaca, Morelos, Mexico.
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Shilnikova N, Karyakina N, Farhat N, Ramoju S, Cline B, Momoli F, Mattison D, Jensen N, Terrell R, Krewski D. Biomarkers of environmental manganese exposure. Crit Rev Toxicol 2022; 52:325-343. [PMID: 35894753 DOI: 10.1080/10408444.2022.2095979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We conducted a critical review on biomarkers of environmental manganese (Mn) exposure to answer the following questions: 1) are there reliable biomarkers of internal Mn exposure (Mn in biological matrices) associated with external metrics of Mn exposure (Mn in environmental media)? and 2) are there accurate reference values (RVs) for Mn in biological matrices? Three bibliographic databases were searched for relevant references and identified references were screened by two independent reviewers. Of the 6342 unique references identified, 86 articles were retained for data abstraction. Our analysis of currently available evidence suggests that Mn levels in blood and urine are not useful biomarkers of Mn exposure in non-occupational settings. The strength of the association between Mn in environmental media and saliva was variable. Findings regarding the utility of hair Mn as a biomarker of environmental Mn exposure are inconsistent. Measurements of Mn in teeth are technically challenging and findings on Mn in tooth components are scarce. In non-occupationally exposed individuals, bone Mn measurements using in vivo neutron activation analysis (IVNAA) are associated with large uncertainties. Findings suggest that Mn in nails may reflect Mn in environmental media and discriminate between groups of individuals exposed to different environmental Mn levels, although more research is needed. Currently, there is no strong evidence for any biological matrix as a valid biomarker of Mn exposure in non-occupational settings. Because of methodological limitations in studies aimed at derivation of RVs for Mn in biological materials, accurate RVs are scarce.
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Affiliation(s)
- Natalia Shilnikova
- Risk Sciences International, Ottawa, Canada.,McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Canada
| | - Nataliya Karyakina
- Risk Sciences International, Ottawa, Canada.,McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Canada
| | - Nawal Farhat
- Risk Sciences International, Ottawa, Canada.,McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Canada.,School of Mathematics and Statistics, Carleton University, Ottawa, Canada
| | | | | | - Franco Momoli
- Risk Sciences International, Ottawa, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada
| | - Donald Mattison
- Risk Sciences International, Ottawa, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada.,Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
| | - Natalie Jensen
- Risk Sciences International, Ottawa, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada
| | - Rowan Terrell
- Risk Sciences International, Ottawa, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada
| | - Daniel Krewski
- Risk Sciences International, Ottawa, Canada.,McLaughlin Centre for Population Health Risk Assessment, University of Ottawa, Ottawa, Canada.,School of Mathematics and Statistics, Carleton University, Ottawa, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada
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7
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Ruiz-Azcona L, Markiv B, Expósito A, Pozueta A, García-Martínez M, Fernández-Olmo I, Santibáñez M. Poorer cognitive function and environmental airborne Mn exposure determined by biomonitoring and personal environmental monitors in a healthy adult population. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 815:152940. [PMID: 35007600 DOI: 10.1016/j.scitotenv.2022.152940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/15/2021] [Accepted: 01/02/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND/AIM In the Santander Bay (Cantabria, northern Spain), a ferromanganese alloy plant is located. Our objective was to characterize the Mn personal exposure of adult healthy volunteers living in this highly Mn exposed region, and to determine its association with a poorer cognitive function. METHODS Cross-sectional study analyzing 130 consecutive participants. Cognitive function was assessed by Stroop Color Word, Verbal Fluency tests, Trail Making Test (TMT), Digit Span (WAIS III) and Rey Osterrieth Complex Figure (ROCF) tests and crude scores were standardized according to NEURONORMA norms. Exposure to Mn was assessed in terms of source distance, by Personal Environmental Monitors (PEMs) allowing the separation of fine (PM2.5) and coarse (PM10-2.5) particles (obtaining the bioaccessible fraction by in-vitro bioaccessibility tests), and by biomarkers (blood, hair and fingernails). Age, sex, study level and number of years of residence were predefined as confounding variables and adjusted Mean Differences (MDs) were obtained. RESULTS Statistically significant lower scores (negative MDs) in all test were observed when living near the industrial emission source, after adjusting for the predefined variables. Regarding PEMs results, statistically significant lower scores in all Stroop parts were obtained in participants with higher levels of Total Mn in All fractions (PM10). For Verbal Fluency tests, negative MDs were obtained for both bioaccessible fractions. Digit Span Backward scores were lower for those with higher levels in the bioaccessible coarse fraction, and negative MDs were also observed for the ROCF Delayed part and the non-bioaccessible fine fraction. As regards to Mn in fingernails, adjusted MDs of -1.60; 95%CI (-2.57 to -0.64) and -1.45; 95%CI (-2.29 to -0.61) for Digit Span Forward and Backward parts were observed. CONCLUSIONS Our results support an association between poorer cognitive function and environmental airborne Mn exposure.
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Affiliation(s)
- Laura Ruiz-Azcona
- Global Health Research Group. Dpto Enfermería, Universidad de Cantabria, Avda. Valdecilla, s/n., 39008 Santander, Cantabria, Spain
| | - Bohdana Markiv
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Avda. Los Castros s/n, 39005 Santander, Cantabria, Spain
| | - Andrea Expósito
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Avda. Los Castros s/n, 39005 Santander, Cantabria, Spain
| | - Ana Pozueta
- Service of Neurology, IDIVAL, University Hospital Marqués de Valdecilla, University of Cantabria, 39008 Santander, Spain; CIBERNED, Network Center for Biomedical Research in Neurodegenerative Diseases, 28031 Madrid, Spain
| | - María García-Martínez
- Service of Neurology, IDIVAL, University Hospital Marqués de Valdecilla, University of Cantabria, 39008 Santander, Spain; CIBERNED, Network Center for Biomedical Research in Neurodegenerative Diseases, 28031 Madrid, Spain
| | - Ignacio Fernández-Olmo
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Avda. Los Castros s/n, 39005 Santander, Cantabria, Spain
| | - Miguel Santibáñez
- Global Health Research Group. Dpto Enfermería, Universidad de Cantabria, Avda. Valdecilla, s/n., 39008 Santander, Cantabria, Spain; Nursing Research Group, IDIVAL, Calle Cardenal Herrera Oria s/n, 39011 Santander, Cantabria, Spain.
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Ruiz-Azcona L, Markiv B, Expósito A, González-Aramburu I, Sierra M, Fernández-Olmo I, Santibáñez M. Biomonitoring and bioaccessibility of environmental airborne manganese in relation to motor function in a healthy adult population. Neurotoxicology 2021; 87:195-207. [PMID: 34678399 DOI: 10.1016/j.neuro.2021.10.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 10/14/2021] [Accepted: 10/14/2021] [Indexed: 11/15/2022]
Abstract
BACKGROUND/AIM Santander, the capital of Cantabria, Spain (172,000 inhabitants) is 7 km from an industrial emission source (IES) of Mn located in a 10,000 inhabitants town (Maliaño) (annual air Mn arithmetic mean = 231.8 ng/m3; reference WHO guideline = 150 ng/m3). Our objective was to compare the motor function of adult healthy volunteers living in both places. METHODS Cross-sectional study analyzing 130 consecutive participants. Exposure to Mn was assessed in terms of source distance from the IES, by Personal Environmental Monitors (PEMs) carried for 24 h by participants consisting of a portable impactor connected to a personal pump, and by biomarkers (blood, hair and fingernails). The impactor allowed the separation of fine (PM2.5) and coarse (PM10-2.5) particles and for each particle size in-vitro bioaccessibility tests with biologically active fluids were performed to separate the soluble (bioaccessible) from the insoluble (non-bioaccessible) fraction. Mean Differences (MDs) adjusted for age, sex, and study level, were obtained for motor function tests results. RESULTS Regarding Grooved Pegboard, overall mean time to complete the test was 59.31 and 65.27 seconds (Standard Deviation = 10.11 and 11.69) for dominant and nondominant hands respectively. Statistically significant higher times (indicating worse function) were observed when living near the IES in both hands but MDs of only 1.22 and 2.05 seconds were obtained after adjusting for the predefined confounders (p = 0.373 and 0.221 respectively). Regarding Mn levels in their PEMs (in both bioaccessible and non-bioaccessible coarse&fine fractions) higher times were computed in participants with higher levels for the bioaccessible-fine fraction, with a MD that diminished but still yielded statistical significance after controlling for confounding: adjusted MD = 3.01 more seconds; 95%CI (0.44-5.38), p = 0.022. Poorer results were also observed for fingernails levels. Regarding Finger Tapping Test, no statistically significant differences were found with the exception of Mn fingernails levels. CONCLUSIONS Our results suggest poorer motor function as assessed by Grooved Pegboard test in relation to "proximity to IES", "bioaccessible-fine fraction as determined by PEMs and "Mn fingernails levels". However, our findings were affected by confounding, and only the adjusted MD for the Mn bioaccessible-fine fraction remained of sufficient magnitude to maintain statistical significance.
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Affiliation(s)
- Laura Ruiz-Azcona
- Global Health Research Group, Dpto Enfermería, Universidad de Cantabria, Avda. Valdecilla, s/n, 39008, Santander, Cantabria, Spain
| | - Bohdana Markiv
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Avda. Los Castros s/n, 39005, Santander, Cantabria, Spain
| | - Andrea Expósito
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Avda. Los Castros s/n, 39005, Santander, Cantabria, Spain
| | - Isabel González-Aramburu
- Service of Neurology, Hospital Universitario Marqués de Valdecilla (HUMV-IDIVAL), Santander, Spain
| | - María Sierra
- Service of Neurology, Hospital Universitario Marqués de Valdecilla (HUMV-IDIVAL), Santander, Spain
| | - Ignacio Fernández-Olmo
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Avda. Los Castros s/n, 39005, Santander, Cantabria, Spain
| | - Miguel Santibáñez
- Global Health Research Group, Dpto Enfermería, Universidad de Cantabria, Avda. Valdecilla, s/n, 39008, Santander, Cantabria, Spain; Nursing Research Group, IDIVAL, Calle Cardenal Herrera Oria s/n, 39011, Santander, Cantabria, Spain.
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9
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Physicochemical Properties of Indoor and Outdoor Particulate Matter 2.5 in Selected Residential Areas near a Ferromanganese Smelter. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18178900. [PMID: 34501491 PMCID: PMC8431365 DOI: 10.3390/ijerph18178900] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/30/2021] [Accepted: 08/15/2021] [Indexed: 12/13/2022]
Abstract
Particulate matter (PM) of different sizes and elemental composition is a leading contributor to indoor and outdoor air pollution in residential areas. We sought to investigate similarities between indoor and outdoor PM2.5 in three residential areas near a ferromanganese smelter in Meyerton to apportion the emission source(s). Indoor and outdoor PM2.5 samples were collected concurrently, using GilAir300 plus samplers, at a flow rate of 2.75 L/min. PM2.5 was collected on polycarbonate membrane filters housed in 37 mm cassettes coupled with PM2.5 cyclones. Scanning electron microscopy coupled with energy-dispersive spectroscopy was used to study the morphology, and inductively coupled plasma-mass spectroscopy was used to analyse the elemental composition of the PM2.5. Mean indoor and outdoor PM2.5 mass concentrations were 10.99 and 24.95 µg/m3, respectively. Mean outdoor mass concentration was 2.27-fold higher than the indoor concentration. Indoor samples consisted of irregular and agglomerated particles, ranging from 0.09 to 1.06 µm, whereas outdoor samples consisted of irregular and spherical particles, ranging from 0.10 to 0.70 µm. Indoor and outdoor PM2.5 were dominated by manganese, silicon, and iron, however, outdoor PM2.5 had the highest concentration of all elements. The ferromanganese smelter was identified as the potential main contributing source of PM2.5 of different physicochemical properties.
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10
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Ruiz-Azcona L, Fernández-Olmo I, Expósito A, Markiv B, Paz-Zulueta M, Parás-Bravo P, Sarabia-Cobo C, Santibáñez M. Impact of Environmental Airborne Manganese Exposure on Cognitive and Motor Functions in Adults: A Systematic Review and Meta-Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18084075. [PMID: 33924318 PMCID: PMC8068914 DOI: 10.3390/ijerph18084075] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/09/2021] [Accepted: 04/10/2021] [Indexed: 12/18/2022]
Abstract
Background/Objective: Whether environmental exposure to Manganese (Mn) in adults is associated with poorer results in cognitive and motor function is unclear. We aimed to determine these associations through a meta-analysis of published studies. Methods: A systematic review was conducted to identify epidemiological studies on a population ≥18 years old exposed to environmental airborne Mn, and in which results on specific tests to evaluate cognitive or motor functions were reported. We consulted Medline through PubMed, Web of Science and SCOPUS databases. We also performed a manual search within the list of bibliographic references of the retrieved studies and systematic reviews. To weight Mn effects, a random effects versus fixed effect model was chosen after studying the heterogeneity of each outcome. Results. Eighteen studies met the inclusion criteria. Among them, eleven studies reported data susceptible for meta-analysis through a pooled correlation or a standardized means difference (SMD) approach between exposed and non-exposed groups. Regarding cognitive function, the results of the studies showed heterogeneity among them (I2 = 76.49%, p < 0.001). The overall effect was a statistically significant negative correlation in the random effects model (pooled r = −0.165; 95%CI: −0.214 to −0.116; p < 0.001). For SMD, the results showed a lower heterogeneity with a negative SMD that did not reach statistical significance under the fixed effects model (SMD = −0.052; 95%CI −0.108 to 0.004; p = 0.068). Regarding motor function, heterogeneity (I2 = 75%) was also observed in the correlation approach with a pooled r (random effect model) = −0.150; 95%CI: −0.219 to −0.079; p < 0.001. Moderate heterogeneity was observed according to the SMD approach (I2 = 52.28%), with a pooled SMD = −0.136; 95%CI: −0.188 to−0.084; p < 0.001, indicating worse motor function in those exposed. Conclusions: Correlation approach results support a negative effect on cognitive and motor functions (the higher the Mn levels, the poorer the scores). Regarding the SMD approach, results also support a worse cognitive and motor functions in those exposed, although only for motor function statistical significance was obtained.
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Affiliation(s)
- Laura Ruiz-Azcona
- Global Health Research Group, Dpto Enfermería, Universidad de Cantabria, Avda. Valdecilla s/n, 39008 Santander, Cantabria, Spain;
| | - Ignacio Fernández-Olmo
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Avda. Los Castros s/n, 39005 Santander, Cantabria, Spain; (I.F.-O.); (A.E.); (B.M.)
| | - Andrea Expósito
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Avda. Los Castros s/n, 39005 Santander, Cantabria, Spain; (I.F.-O.); (A.E.); (B.M.)
| | - Bohdana Markiv
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Avda. Los Castros s/n, 39005 Santander, Cantabria, Spain; (I.F.-O.); (A.E.); (B.M.)
| | - María Paz-Zulueta
- Economía de la Salud y Gestión de Servicios Sanitarios Research Group, Dpto Enfermería, Universidad de Cantabria, Avda. Valdecilla s/n, 39008 Santander, Cantabria, Spain; (M.P.-Z.); (P.P.-B.)
- Research Health and Bioethics Law Group, GRIDES, IDIVAL, Calle Cardenal Herrera Oria s/n, 39011 Santander, Cantabria, Spain
| | - Paula Parás-Bravo
- Economía de la Salud y Gestión de Servicios Sanitarios Research Group, Dpto Enfermería, Universidad de Cantabria, Avda. Valdecilla s/n, 39008 Santander, Cantabria, Spain; (M.P.-Z.); (P.P.-B.)
- Cuidados Research Group, Dpto Enfermería, Universidad de Cantabria, Avda. Valdecilla s/n, 39008 Santander, Cantabria, Spain;
| | - Carmen Sarabia-Cobo
- Cuidados Research Group, Dpto Enfermería, Universidad de Cantabria, Avda. Valdecilla s/n, 39008 Santander, Cantabria, Spain;
- Research Nursing Group, IDIVAL, Calle Cardenal Herrera Oria s/n, 39011 Santander, Cantabria, Spain
| | - Miguel Santibáñez
- Global Health Research Group, Dpto Enfermería, Universidad de Cantabria, Avda. Valdecilla s/n, 39008 Santander, Cantabria, Spain;
- Research Nursing Group, IDIVAL, Calle Cardenal Herrera Oria s/n, 39011 Santander, Cantabria, Spain
- Correspondence:
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11
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Fernández-Olmo I, Mantecón P, Markiv B, Ruiz-Azcona L, Santibáñez M. A Review on the Environmental Exposure to Airborne Manganese, Biomonitoring, and Neurological/Neuropsychological Outcomes. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 254:85-130. [PMID: 32474705 DOI: 10.1007/398_2020_46] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The occupational exposure to airborne manganese (Mn) has been linked for decades with neurological effects. With respect to its environmental exposure, the first reviews on this matter stated that the risk posed to human health by this kind of exposure was still unknown. Later, many studies have been developed to analyze the association between environmental Mn exposure and health effects, most of them including the measure of Mn in selected human biomarkers. This review aims at collecting and organizing the literature dealing with the environmental airborne Mn exposure (other routes of exposure were intentionally removed from this review), the biomonitoring of this metal in different body matrices (e.g., blood, urine, nails, hair), and the association between exposure and several adverse health effects, such as, e.g., neurocognitive, neurodevelopmental, or neurobehavioral outcomes. From the different exposure routes, inhalation was the only one considered in this review, to take into account the areas influenced by industrial activities closely related to the Mn industry (ferromanganese and silicomanganese plants, Mn ore mines, and their processing plants) and by traffic in countries where a fuel additive, methylcyclopentadienyl manganese tricarbonyl (MMT), has been used for years. In these areas, high air Mn levels have been reported in comparison with the annual Reference Concentration (RfC) given by the US EPA for Mn, 50 ng/m3. This review was performed using Scopus and MEDLINE databases with a keyword search strategy that took into account that each valid reference should include at least participants that were exposed to environmental airborne Mn and that were subjected to analysis of Mn in biomarkers or subjected to neurological/neuropsychological tests or both. Overall, 47 references matching these criteria were included in the discussion. Most of them report the measure of Mn in selected biomarkers (N = 43) and the assessment of different neurological outcomes (N = 31). A negative association is usually obtained between Mn levels in hair and some neurological outcomes, such as cognitive, motor, olfactory, and emotional functions, but not always significant. However, other biomarkers, such as blood and urine, do not seem to reflect the chronic environmental exposure to low/moderate levels of airborne Mn. Further studies combining the determination of the Mn exposure through environmental airborne sources and biomarkers of exposure and the evaluation of at least cognitive and motor functions are needed to better understand the effects of chronic non-occupational exposure to airborne Mn.
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Affiliation(s)
- Ignacio Fernández-Olmo
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Santander, Cantabria, Spain.
| | - Paula Mantecón
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Santander, Cantabria, Spain
| | - Bohdana Markiv
- Dpto. de Ingenierías Química y Biomolecular, Universidad de Cantabria, Santander, Cantabria, Spain
| | - Laura Ruiz-Azcona
- Global Health Research Group, Dpto. Enfermería, Universidad de Cantabria-IDIVAL, Santander, Cantabria, Spain
| | - Miguel Santibáñez
- Global Health Research Group, Dpto. Enfermería, Universidad de Cantabria-IDIVAL, Santander, Cantabria, Spain
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12
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Balachandran RC, Mukhopadhyay S, McBride D, Veevers J, Harrison FE, Aschner M, Haynes EN, Bowman AB. Brain manganese and the balance between essential roles and neurotoxicity. J Biol Chem 2020; 295:6312-6329. [PMID: 32188696 PMCID: PMC7212623 DOI: 10.1074/jbc.rev119.009453] [Citation(s) in RCA: 142] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Manganese (Mn) is an essential micronutrient required for the normal development of many organs, including the brain. Although its roles as a cofactor in several enzymes and in maintaining optimal physiology are well-known, the overall biological functions of Mn are rather poorly understood. Alterations in body Mn status are associated with altered neuronal physiology and cognition in humans, and either overexposure or (more rarely) insufficiency can cause neurological dysfunction. The resultant balancing act can be viewed as a hormetic U-shaped relationship for biological Mn status and optimal brain health, with changes in the brain leading to physiological effects throughout the body and vice versa. This review discusses Mn homeostasis, biomarkers, molecular mechanisms of cellular transport, and neuropathological changes associated with disruptions of Mn homeostasis, especially in its excess, and identifies gaps in our understanding of the molecular and biochemical mechanisms underlying Mn homeostasis and neurotoxicity.
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Affiliation(s)
| | - Somshuvra Mukhopadhyay
- Division of Pharmacology and Toxicology, College of Pharmacy, Institute for Cellular and Molecular Biology, and Institute for Neuroscience, University of Texas, Austin, Texas 78712
| | - Danielle McBride
- College of Medicine, University of Cincinnati, Cincinnati, Ohio 45267
| | - Jennifer Veevers
- College of Medicine, University of Cincinnati, Cincinnati, Ohio 45267
| | - Fiona E Harrison
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee 37232
| | | | - Erin N Haynes
- College of Public Health, University of Kentucky, Lexington, Kentucky 40536
| | - Aaron B Bowman
- School of Health Sciences, Purdue University, West Lafayette, Indiana 47907
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13
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Miah MR, Ijomone OM, Okoh COA, Ijomone OK, Akingbade GT, Ke T, Krum B, da Cunha Martins A, Akinyemi A, Aranoff N, Antunes Soares FA, Bowman AB, Aschner M. The effects of manganese overexposure on brain health. Neurochem Int 2020; 135:104688. [PMID: 31972215 PMCID: PMC7926190 DOI: 10.1016/j.neuint.2020.104688] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 01/12/2020] [Accepted: 01/15/2020] [Indexed: 12/11/2022]
Abstract
Manganese (Mn) is the twelfth most abundant element on the earth and an essential metal to human health. Mn is present at low concentrations in a variety of dietary sources, which provides adequate Mn content to sustain support various physiological processes in the human body. However, with the rise of Mn utility in a variety of industries, there is an increased risk of overexposure to this transition metal, which can have neurotoxic consequences. This risk includes occupational exposure of Mn to workers as well as overall increased Mn pollution affecting the general public. Here, we review exposure due to air pollution and inhalation in industrial settings; we also delve into the toxic effects of manganese on the brain such as oxidative stress, inflammatory response and transporter dysregulation. Additionally, we summarize current understandings underlying the mechanisms of Mn toxicity.
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Affiliation(s)
- Mahfuzur R Miah
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA; Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA.
| | - Omamuyovwi M Ijomone
- The Neuro-Lab, Department of Human Anatomy, School of Health and Health Technology, Federal University of Technology Akure, Ondo, Nigeria
| | - Comfort O A Okoh
- The Neuro-Lab, Department of Human Anatomy, School of Health and Health Technology, Federal University of Technology Akure, Ondo, Nigeria
| | - Olayemi K Ijomone
- The Neuro-Lab, Department of Human Anatomy, School of Health and Health Technology, Federal University of Technology Akure, Ondo, Nigeria; Department of Anatomy, University of Medical Sciences, Ondo, Nigeria
| | - Grace T Akingbade
- The Neuro-Lab, Department of Human Anatomy, School of Health and Health Technology, Federal University of Technology Akure, Ondo, Nigeria
| | - Tao Ke
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Bárbara Krum
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA; Department of Pharmacology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | | | - Ayodele Akinyemi
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Nicole Aranoff
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA; Stern College for Women, Yeshiva University, New York, NY, USA
| | - Felix Alexandre Antunes Soares
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA; Department of Biochemistry and Molecular Biology, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - Aaron B Bowman
- School of Health Sciences, Purdue University, West Lafayette, IN, USA
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA; Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA; Sechenov First Moscow State Medical University, Moscow, Russia.
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14
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Bakulski KM, Seo YA, Hickman RC, Brandt D, Vadari HS, Hu H, KyunPark S. Heavy Metals Exposure and Alzheimer's Disease and Related Dementias. J Alzheimers Dis 2020; 76:1215-1242. [PMID: 32651318 PMCID: PMC7454042 DOI: 10.3233/jad-200282] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Alzheimer's disease and related dementias lack effective treatment or cures and are major public health challenges. Risk for Alzheimer's disease and related dementias is partially attributable to environmental factors. The heavy metals lead, cadmium, and manganese are widespread and persistent in our environments. Once persons are exposed to these metals, they are adept at entering cells and reaching the brain. Lead and cadmium are associated with numerous health outcomes even at low levels of exposure. Although manganese is an essential metal, deficiency or environmental exposure or high levels of the metal can be toxic. In cell and animal model systems, lead, cadmium, and manganese are well documented neurotoxicants that contribute to canonical Alzheimer's disease pathologies. Adult human epidemiologic studies have consistently shown lead, cadmium, and manganese are associated with impaired cognitive function and cognitive decline. No longitudinal human epidemiology study has assessed lead or manganese exposure on Alzheimer's disease specifically though two studies have reported a link between cadmium and Alzheimer's disease mortality. More longitudinal epidemiologic studies with high-quality time course exposure data and incident cases of Alzheimer's disease and related dementias are warranted to confirm and estimate the proportion of risk attributable to these exposures. Given the widespread and global exposure to lead, cadmium, and manganese, even small increases in the risks of Alzheimer's disease and related dementias would have a major population impact on the burden on disease. This article reviews the experimental and epidemiologic literature of the associations between lead, cadmium, and manganese on Alzheimer's disease and related dementias and makes recommendations of critical areas of future investment.
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Affiliation(s)
- Kelly M. Bakulski
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Young Ah Seo
- Department of Nutritional Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Ruby C. Hickman
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Daniel Brandt
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Harita S. Vadari
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
| | - Howard Hu
- School of Public Health, University of Washington, Seattle, WA, USA
| | - Sung KyunPark
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, MI, USA
- Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, MI, USA
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15
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McRae N, Bello G, Svensson K, Solano-González M, Wright RJ, Niedzwiecki MM, Calapiz MT, Amarasiriwardena C, Schnaas L, Tamayo-Ortiz M, Téllez-Rojo MM, Wright RO. Blood manganese levels during pregnancy and postpartum depression: A cohort study among women in Mexico. Neurotoxicology 2019; 76:183-190. [PMID: 31730893 DOI: 10.1016/j.neuro.2019.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 10/16/2019] [Accepted: 11/11/2019] [Indexed: 01/09/2023]
Abstract
BACKGROUND Occupational studies have shown an association between elevated Mn exposure and depressive symptoms. Blood Mn (BMn) naturally rises during pregnancy due to mobilization from tissues, suggesting it could contribute to pregnancy and postpartum depressive symptoms. OBJECTIVES To assess the association between BMn levels during pregnancy and postpartum depression (PPD), creating opportunities for possible future interventions. METHODS We studied 561 women from the reproductive longitudinal Programming Research in Obesity, Growth, Environment, and Social Stressors (PROGRESS) cohort in Mexico City. BMn was measured at the 2nd and 3rd trimesters, as well as delivery. The Edinburgh Postnatal Depression Scale (EPDS) was used to assess PPD symptoms at 12-months postpartum. We used a generalized linear model assuming a Poisson distribution to assess the association between BMn levels and PPD, with adjustments for age, stress and depressive symptoms during pregnancy, education, socioeconomic status, and contemporaneous blood lead levels. RESULTS The mean ± standard deviation (SD) EPDS score at 12-months postpartum was 6.51 ± 5.65, and 17.11% of women met the criteria for possible PPD (score ≥ 13). In adjusted models, BMn during the 3rd trimester (β: 0.13, 95% CI: 0.04-0.21) and BMn levels averaged at the 2nd and 3rd trimester (β: 0.14, 95% CI: 0.02-0.26) had a positive association with EPDS scores at 12 months postpartum. BMn at the 2nd trimester (β: 0.07, 95% CI: -0.09-0.22) and delivery (β: 0.03, 95% CI: -0.04-0.10) had a non-significant positive association with EPDS scores at 12-months postpartum. Stress and depressive symptoms during pregnancy was associated with higher EPDS scores at 12-months postpartum in all of the adjusted models but were only significant when either BMn during 3rd trimester or BMn averaged across 2nd and 3rd trimester was assessed as the exposure. DISCUSSION Our results demonstrate that elevated BMn levels during pregnancy predict PPD symptoms and could be a potential pathway for intervention and prevention of PPD.
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Affiliation(s)
- Nia McRae
- Department of Environmental Medicine & Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Ghalib Bello
- London Institute of Medical Sciences, Imperial College, London, UK
| | | | - Maritsa Solano-González
- Center for Nutrition and Health Research, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | - Rosalind J Wright
- Department of Environmental Medicine & Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Megan M Niedzwiecki
- Department of Environmental Medicine & Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Mariana Torres Calapiz
- Division of Community Interventions Research, National Institute of Perinatology, Mexico City, Mexico
| | - Chitra Amarasiriwardena
- Department of Environmental Medicine & Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Lourdes Schnaas
- Division of Community Interventions Research, National Institute of Perinatology, Mexico City, Mexico
| | - Marcela Tamayo-Ortiz
- Center for Nutrition and Health Research, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico; Consejo Nacional de Ciencia y Tecnología, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | - Martha M Téllez-Rojo
- Center for Nutrition and Health Research, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | - Robert O Wright
- Department of Environmental Medicine & Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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16
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Rolle-McFarland D, Liu Y, Mostafaei F, Zauber SE, Zhou Y, Li Y, Fan Q, Zheng W, Nie LH, Wells EM. The association of bone, fingernail and blood manganese with cognitive and olfactory function in Chinese workers. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 666:1003-1010. [PMID: 30970467 PMCID: PMC6461352 DOI: 10.1016/j.scitotenv.2019.02.208] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 02/12/2019] [Accepted: 02/13/2019] [Indexed: 05/28/2023]
Abstract
Occupational manganese (Mn) exposure has been associated with cognitive and olfactory dysfunction; however, few studies have incorporated cumulative biomarkers of Mn exposure such as bone Mn (BnMn). Our goal was to assess the cross-sectional association between BnMn, blood Mn (BMn), and fingernail Mn (FMn) with cognitive and olfactory function among Mn-exposed workers. A transportable in vivo neutron activation analysis (IVNAA) system was designed and utilized to assess BnMn among 60 Chinese workers. BMn and FMn were measured using inductively coupled plasma mass spectrometry. Cognitive and olfactory function was assessed using Animal and Fruit Naming tests, World Health Organization/University of California-Los Angeles Auditory Verbal Learning Test (AVLT) and the University of Pennsylvania Smell Identification Test (UPSIT). Additional data were obtained via questionnaire. Regression models adjusted for age, education, factory of employment, and smoking status (UPSIT only), were used to assess the relationship between Mn biomarkers and test scores. In adjusted models, increasing BnMn was significantly associated with decreased performance on average AVLT scores [β (95% confidence interval (CI)) = -0.65 (-1.21, -0.09)] and Animal Naming scores [β (95% CI) = -1.54 (-3.00, -0.07)]. Increasing FMn was significantly associated with reduced performance measured by the average AVLT [β (95% CI) = -0.35 (-0.70, -0.006)] and the difference in AVLT scores [β (95% CI) = -0.40 (-0.77, -0.03)]. BMn was not significantly associated with any test scores; no significant associations were observed with Fruit Naming or UPSIT tests. BnMn and FMn, but not BMn, are associated with cognitive function in Mn-exposed workers. None of the biomarkers were significantly associated with olfactory function.
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Affiliation(s)
- Danelle Rolle-McFarland
- School of Health Sciences, Purdue University, West Lafayette, IN, USA; Public Health Graduate Program, Purdue University, West Lafayette, IN, USA; Department of Cancer Epidemiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Yingzi Liu
- School of Health Sciences, Purdue University, West Lafayette, IN, USA; Department of Radiation Oncology, School of Medicine, Emory University, Atlanta, GA, USA
| | - Farshad Mostafaei
- School of Health Sciences, Purdue University, West Lafayette, IN, USA; Department of Radiation Oncology, University of Arizona, Tucson, AZ, USA
| | - S Elizabeth Zauber
- Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Yuanzhong Zhou
- School of Public Health, Zunyi Medical University, Zunyi, Guizhou, China
| | - Yan Li
- School of Public Health, Zunyi Medical University, Zunyi, Guizhou, China
| | - Qiyuan Fan
- Zunyi Medical and Pharmaceutical College, Zunyi, Guizhou, China
| | - Wei Zheng
- School of Health Sciences, Purdue University, West Lafayette, IN, USA
| | - Linda H Nie
- School of Health Sciences, Purdue University, West Lafayette, IN, USA
| | - Ellen M Wells
- School of Health Sciences, Purdue University, West Lafayette, IN, USA; Public Health Graduate Program, Purdue University, West Lafayette, IN, USA.
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17
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Ghanemi A, He L, Yan M. New factors influencing G protein coupled receptors’ system functions. ALEXANDRIA JOURNAL OF MEDICINE 2019. [DOI: 10.1016/j.ajme.2012.10.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Abdelaziz Ghanemi
- Department of Pharmacology, China Pharmaceutical University, Nanjing, 210009, China
| | - Ling He
- Department of Pharmacology, China Pharmaceutical University, Nanjing, 210009, China
| | - Ming Yan
- National Drug Screening Laboratory, China Pharmaceutical University, Nanjing, 210009, China
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18
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Irizar A, Gil F, Lertxundi A, Martín-Domingo MC, Urbieta N, Molinuevo A, Ibarluzea J, Basterrechea M, Aurrekoetxea JJ, Jiménez-Zabala A, Santa-Marina L. Manganese levels in newborns' hair by maternal sociodemographic, dietary and environmental factors. ENVIRONMENTAL RESEARCH 2019; 170:92-100. [PMID: 30576994 DOI: 10.1016/j.envres.2018.11.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 11/21/2018] [Accepted: 11/22/2018] [Indexed: 06/09/2023]
Abstract
Exposure to manganese (Mn) has been associated with neurodevelopmental problems in children. Mn exposure begins in utero, and maternal sociodemographic, dietary and environmental factors may affect Mn levels in newborns' hair. This study aimed to characterize in utero Mn exposure using Mn levels in newborns' hair as a biomarker of prenatal exposure, and to analyze its relationship with sociodemographic, dietary and environmental factors in the Spanish INMA-Gipuzkoa cohort. Overall, 638 pregnant women were recruited in the first trimester of pregnancy and a hair sample was obtained from 473 newborns. Sociodemographic, dietary and environmental data were recorded through two questionnaires administered in the first and third trimesters of pregnancy. The median Mn concentration in newborns´ hair was 0.31 µg/g (P5 = 0.02; P95 = 1.23). Mn levels in newborns´ hair were associated with smoking during pregnancy (β = 0.222; 95% CI = 0.065-0.379) and with maternal PM2.5 exposure (β = 0.025; 95% CI = 0.004; 0.047), as well as with cereal and pasta intake in the first trimester of pregnancy (β = 0.002; 95% CI = 0.0004; 0.003). In conclusion, fetal exposure to Mn was associated with smoking and exposure to atmospheric pollution during pregnancy.
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Affiliation(s)
- A Irizar
- BIODONOSTIA Health Research Institute, Paseo Dr. Beguiristain, San Sebastian 20014, Spain.
| | - F Gil
- Department of Legal Medicine and Toxicology, School of Medicine, University of Granada, Spain
| | - A Lertxundi
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3-5, 28029 Madrid, Spain; Department of Preventive Medicine and Public Health of the University of the Basque Country (UPV-EHU), Spain
| | - M C Martín-Domingo
- Department of Legal Medicine and Toxicology, School of Medicine, University of Granada, Spain
| | - N Urbieta
- BIODONOSTIA Health Research Institute, Paseo Dr. Beguiristain, San Sebastian 20014, Spain
| | - A Molinuevo
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3-5, 28029 Madrid, Spain
| | - J Ibarluzea
- BIODONOSTIA Health Research Institute, Paseo Dr. Beguiristain, San Sebastian 20014, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3-5, 28029 Madrid, Spain; Public Health Division of Gipuzkoa, Basque Government, 4 Av. de Navarra, San Sebastian 20013, Spain
| | - M Basterrechea
- BIODONOSTIA Health Research Institute, Paseo Dr. Beguiristain, San Sebastian 20014, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3-5, 28029 Madrid, Spain; Public Health Division of Gipuzkoa, Basque Government, 4 Av. de Navarra, San Sebastian 20013, Spain
| | - J J Aurrekoetxea
- BIODONOSTIA Health Research Institute, Paseo Dr. Beguiristain, San Sebastian 20014, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3-5, 28029 Madrid, Spain; Public Health Division of Gipuzkoa, Basque Government, 4 Av. de Navarra, San Sebastian 20013, Spain; Department of Preventive Medicine and Public Health of the University of the Basque Country (UPV-EHU), Spain
| | - A Jiménez-Zabala
- Public Health Division of Gipuzkoa, Basque Government, 4 Av. de Navarra, San Sebastian 20013, Spain
| | - L Santa-Marina
- BIODONOSTIA Health Research Institute, Paseo Dr. Beguiristain, San Sebastian 20014, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, C/Monforte de Lemos 3-5, 28029 Madrid, Spain; Public Health Division of Gipuzkoa, Basque Government, 4 Av. de Navarra, San Sebastian 20013, Spain
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Manganese Exposure and Cognition Across the Lifespan: Contemporary Review and Argument for Biphasic Dose-Response Health Effects. Curr Environ Health Rep 2018; 3:392-404. [PMID: 27722879 DOI: 10.1007/s40572-016-0108-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Manganese (Mn) is both an essential micronutrient and potential neurotoxicant. This dual role underlies a growing body of literature demonstrating that Mn exhibits a biphasic dose-response relationship with neurocognitive outcomes. We reviewed recent epidemiologic studies from 2007 to 2016 that investigated the relationship between Mn exposure and cognitive outcomes across the lifespan: early life, school-aged children, and adulthood. In total, 27 research articles were included in this review: 12 pediatric and 15 adult studies (10 occupational and five environmental exposures). The majority of these studies provided evidence of the negative effects of Mn exposure on cognition. The pediatric literature provides evidence that both high and low levels of Mn are negatively associated with intellectual development. Future Mn research should include examination of non-linear relationships and multiple neurotoxicants across the lifespan and particularly during critical developmental windows.
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Amir Abdul Nasir AF, Cameron SF, von Hippel FA, Postlethwait J, Niehaus AC, Blomberg S, Wilson RS. Manganese accumulates in the brain of northern quolls (Dasyurus hallucatus) living near an active mine. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 233:377-386. [PMID: 29096311 DOI: 10.1016/j.envpol.2017.10.088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 10/20/2017] [Accepted: 10/23/2017] [Indexed: 06/07/2023]
Abstract
Mining is fundamental to the Australian economy, yet little is known about how potential contaminants bioaccumulate and affect wildlife living near active mining sites. Here, we show using air sampling that fine manganese dust within the respirable size range is found at levels exceeding international recommendations even 20 km from manganese extraction, processing, and storage facilities on Groote Eylandt, Northern Territory. Endangered northern quolls (Dasyurus hallucatus) living near mining sites were found to have elevated manganese concentrations within their hair, testes, and in two brain regions-the neocortex and cerebellum, which are responsible for sensory perception and motor function, respectively. Accumulation in these organs has been associated with adverse reproductive and neurological effects in other species and could affect the long-term population viability of northern quolls.
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Affiliation(s)
| | - Skye F Cameron
- School of Biological Sciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Frank A von Hippel
- Department of Biological Sciences and Centre for Bioengineering Innovation, Northern Arizona University, Flagstaff, AZ 86011, USA
| | - John Postlethwait
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
| | - Amanda C Niehaus
- School of Biological Sciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Simon Blomberg
- School of Biological Sciences, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Robbie S Wilson
- School of Biological Sciences, The University of Queensland, St Lucia, QLD 4072, Australia.
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21
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Cortez-Lugo M, Riojas-Rodríguez H, Moreno-Macías H, Montes S, Rodríguez-Agudelo Y, Hernández-Bonilla D, Catalán-Vázquez M, Díaz-Godoy R, Rodríguez-Dozal S. Evaluation of the effect of an environmental management program on exposure to manganese in a mining zone in Mexico. Neurotoxicology 2018; 64:142-151. [DOI: 10.1016/j.neuro.2017.08.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 08/31/2017] [Accepted: 08/31/2017] [Indexed: 12/19/2022]
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22
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Bowler RM, Adams SW, Schwarzer R, Gocheva VV, Roels HA, Kim Y, Kircos CL, Wright CW, Colledge M, Bollweg G, Lobdell DT. Validity of self-reported concentration and memory problems: Relationship with neuropsychological assessment and depression. J Clin Exp Neuropsychol 2017; 39:1026-1036. [PMID: 28353391 PMCID: PMC5620116 DOI: 10.1080/13803395.2017.1301392] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 02/24/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND This study investigated the validity of self-reported concentration and memory problems (CMP) in residents environmentally exposed to manganese (Mn). METHOD Self-report of CMP from a health questionnaire (HQ) and the Symptom Checklist-90-Revised (SCL-90-R) was compared to neuropsychological assessment (Trails A&B; Digit Span; Digit Symbol; Similarities; Auditory Consonant Trigrams, ACT; NAB Memory; Rey-Osterrieth, Rey-O, Delayed). Participants included 146 residents from Ohio exposed to air-Mn, with a modeled average concentration of 0.55 µg m-3 (range = 0.01-4.58). RESULTS Residents were primarily White (94.5%), aged 30-64 years (M = 51.24), with a minimum of 10 years of residence (range = 10-64). Ninety-four (65.3%) participants reported concentration problems, and 107 residents (73.3%) reported memory problems. More participants endorsed CMP on the SCL-90-R than on the HQ. The prevalence of self-reported CMP was higher for women than for men (88.4% vs. 68.3%). Point-biserial and Pearson's correlations between self-reported CMP and neuropsychological test scores were nonsignificant and weak for both the HQ (rpb = -.20 to rpb = .04) and the SCL-90-R (r = -.12 to r = .007). Greater levels of depression, anxiety, and female sex predicted having more self-reported CMP on both the HQ and the SCL-90-R. Air-Mn and blood-Mn were not associated with self-reported CMP. Residential distance from the Mn source accounted for a small proportion of variance (sr2 = .04), although depression remained the largest predictor (sr2 = .21). CONCLUSION These results indicate that self-report of CMP in Mn-exposed residents appear to be invalid when compared to neuropsychological test scores. The participants' misperception of having CMP is associated with less education and higher levels of depression. Neuropsychological assessment is recommended to attain valid results.
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Affiliation(s)
- Rosemarie M Bowler
- a Department of Psychology , San Francisco State University , San Francisco , CA , USA
| | - Shane W Adams
- a Department of Psychology , San Francisco State University , San Francisco , CA , USA
| | - Ralf Schwarzer
- b Institute for Positive Psychology and Education, Faculty of Health Sciences , Australian Catholic University , Strathfield , NSW , Australia
- c Department of Clinical, Health, and Rehabilitation Psychology , SWPS University of Social Sciences and Humanities , Warsaw , Poland
| | - Vihra V Gocheva
- a Department of Psychology , San Francisco State University , San Francisco , CA , USA
| | - Harry A Roels
- d Louvain Centre for Toxicology and Applied Pharmacology (LTAP) , Université catholique de Louvain , Brussels , Belgium
| | - Yangho Kim
- e Department of Occupational and Environmental Medicine , Ulsan University Hospital, University of Ulsan College of Medicine , Ulsan , South Korea
| | - Catherine L Kircos
- a Department of Psychology , San Francisco State University , San Francisco , CA , USA
| | - Chris W Wright
- a Department of Psychology , San Francisco State University , San Francisco , CA , USA
| | | | | | - Danelle T Lobdell
- h U.S. EPA , National Health and Environmental Effects Research Laboratory , Research Triangle Park , NC , USA
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Da Silva ALC, Urbano MR, Almeida Lopes ACBD, Carvalho MDFH, Buzzo ML, Peixe TS, Aschner M, Mesas AE, Paoliello MMB. Blood manganese levels and associated factors in a population-based study in Southern Brazil. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 80:1064-1077. [PMID: 28850015 DOI: 10.1080/15287394.2017.1357354] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Manganese (Mn) is an essential dietary nutrient for human health serving as a cofactor for many enzymes; however, exposure to excessive quantities of Mn may lead to toxicity with symptoms analogous to Parkinson's disease (PD). Population-based biomonitoring is an effective tool for characterizing the body burden of environmental or occupational pollutants, including Mn. The objective of this cross-sectional study was to (1) estimate reference values (RV) for blood Mn in an adult population and (2) assess the variables that were associated with higher blood metal levels. A total of 947 adults, aged 40 years or older, were randomly selected in a city in Southern Brazil. Information on socioeconomic, dietary, lifestyle, and occupational background was collected by trained interviewers. Blood Mn levels (μg/L) were analyzed by inductively coupled plasma-mass spectrometer (ICP-MS). The RV for blood Mn concentrations were obtained from the upper limits of the 95% confidence intervals (CI) of the 95th percentile distributions. Cluster analysis was performed to identify variables associated with high or low blood Mn concentrations. The RV for blood Mn levels in this study were 18.54 and 20.15 μg/L for men and women, respectively. Mn blood concentrations decreased with age and were higher in females compared to males. No marked association was noted between blood Mn and smoking or drinking habits, education levels and socioeconomic status. Diastolic blood pressure was higher in a group of women approximately 54 years of age associated with elevated blood Mn levels. Important reference data stratified by demographic and lifestyle factors that may prove useful for future surveillance of environmental exposure to Mn and health risks associated with this metal are presented.
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Affiliation(s)
- Ana Lívia Carvalho Da Silva
- a Graduate Program in Public Health, Center of Health Sciences , State University of Londrina , Paraná , Londrina, Brazil
| | | | | | | | | | - Tiago Severo Peixe
- d Department of Pathology, Clinical and Toxicological Analysis , State University of Londrina , Paraná , Brazil
| | - Michael Aschner
- e Department of Molecular Pharmacology , Albert Einstein College of Medicine , Bronx , NY , USA
| | - Arthur Eumann Mesas
- a Graduate Program in Public Health, Center of Health Sciences , State University of Londrina , Paraná , Londrina, Brazil
| | - Monica Maria Bastos Paoliello
- a Graduate Program in Public Health, Center of Health Sciences , State University of Londrina , Paraná , Londrina, Brazil
- e Department of Molecular Pharmacology , Albert Einstein College of Medicine , Bronx , NY , USA
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24
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Młyniec K, Gaweł M, Doboszewska U, Starowicz G, Nowak G. The Role of Elements in Anxiety. VITAMINS AND HORMONES 2016; 103:295-326. [PMID: 28061974 DOI: 10.1016/bs.vh.2016.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Elements (bioelements) are necessary factors required for the physiological function of organisms. They are critically involved in fundamental processes of life. Extra- and intracellular message and metabolic pathway factors as well as structural components include one or many elements in their functional structure. Recent years have seen an intensification in terms of knowledge gained about the roles of elements in anxiety disorders. In this chapter we present a review of the most important current data concerning the involvement of zinc, magnesium, copper, lithium, iron, and manganese, and their deficiency, in the pathophysiology and treatment of anxiety.
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Affiliation(s)
- K Młyniec
- Faculty of Pharmacy, Jagiellonian University Medical College, Krakow, Poland.
| | - M Gaweł
- Faculty of Pharmacy, Jagiellonian University Medical College, Krakow, Poland
| | - U Doboszewska
- Faculty of Pharmacy, Jagiellonian University Medical College, Krakow, Poland
| | - G Starowicz
- Faculty of Pharmacy, Jagiellonian University Medical College, Krakow, Poland
| | - G Nowak
- Faculty of Pharmacy, Jagiellonian University Medical College, Krakow, Poland
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25
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Hernández-Bonilla D, Escamilla-Núñez C, Mergler D, Rodríguez-Dozal S, Cortez-Lugo M, Montes S, Tristán-López LA, Catalán-Vázquez M, Schilmann A, Riojas-Rodriguez H. Effects of manganese exposure on visuoperception and visual memory in schoolchildren. Neurotoxicology 2016; 57:230-240. [PMID: 27737811 DOI: 10.1016/j.neuro.2016.10.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 10/08/2016] [Accepted: 10/08/2016] [Indexed: 10/20/2022]
Abstract
BACKGROUND Manganese (Mn) is an essential metal involved in multiple physiological functions. Environmental exposure to airborne Mn is associated with neurocognitive deficits in humans. Children, whose nervous system is in development, are particularly susceptible to Mn neurotoxicity. OBJECTIVE The objective of this study was to assess the association between Mn environmental exposure, and effects on visuoperception and visual memory in schoolchildren. METHODS We assessed schoolchildren between 7 and 11 years old, with similar socioeconomic status, from the mining district of Molango (n=148) and Agua Blanca (n=119, non-mining area) in Hidalgo state, Mexico. The Rey-Osterrieth Complex Figure (ROCF) test was used to assess visuoperception and short-term visual memory. Hair manganese (MnH) concentrations were determined. Linear regression models were constructed to estimate the associations between MnH and ROCF scores, adjusted for potential confounders. RESULTS The geometric mean MnH was nine times higher in schoolchildren from the Mn mining area (5.25μg/g) than in schoolchildren from the non-mining area (0.55μg/g). For the ROCF Copy trial, MnH was significantly associated with an increase in distortion errors (tangency, closure), angle errors, overtracing (partial overtracing). In the Immediate Recall trial, MnH was significantly associated with increased overtracing (partial overtracing) and omissions, and negatively associated with the number of perceptual drawn units, total score and percentage immediate recall. CONCLUSIONS MnH is associated with alterations in visuoperception and short-term visual memory in schoolchildren exposed to airborne Mn.
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Affiliation(s)
- D Hernández-Bonilla
- National Institute of Public Health, Environmental Health Department, Cuernavaca, Morelos, CP 62100, Mexico.
| | - C Escamilla-Núñez
- National Institute of Public Health, Environmental Health Department, Cuernavaca, Morelos, CP 62100, Mexico.
| | - D Mergler
- Centre for Interdisciplinary Research on Health and Well-being, Society and Environment (CINBIOSE), Université du Québec à Montréal, Montreal, Canada.
| | - S Rodríguez-Dozal
- National Institute of Public Health, Environmental Health Department, Cuernavaca, Morelos, CP 62100, Mexico.
| | - M Cortez-Lugo
- National Institute of Public Health, Environmental Health Department, Cuernavaca, Morelos, CP 62100, Mexico.
| | - S Montes
- National Institute of Neurology and Neurosurgery, Neurochemistry Department, Manuel Velasco Suárez, Mexico City, CP 14269, Mexico.
| | - L A Tristán-López
- National Institute of Neurology and Neurosurgery, Neurochemistry Department, Manuel Velasco Suárez, Mexico City, CP 14269, Mexico.
| | - M Catalán-Vázquez
- National Institute of Respiratory Diseases, Clinical Epidemiology Department, Mexico City, CP 14080, Mexico.
| | - A Schilmann
- National Institute of Public Health, Environmental Health Department, Cuernavaca, Morelos, CP 62100, Mexico.
| | - Horacio Riojas-Rodriguez
- National Institute of Public Health, Environmental Health Department, Cuernavaca, Morelos, CP 62100, Mexico.
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26
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Bowler RM, Adams SW, Wright CW, Kim Y, Booty A, Colledge M, Gocheva VV, Lobdell DT. Medication use associated with exposure to manganese in two Ohio towns. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2016; 26:483-96. [PMID: 27295281 PMCID: PMC5583632 DOI: 10.1080/09603123.2016.1194381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 04/08/2016] [Indexed: 06/06/2023]
Abstract
This report describes the use of medications as a proxy when medical record reviews are unavailable, to study the health effects of residents environmentally exposed to air-manganese (n = 185) compared to unexposed residents (n = 90). Participants' current medication lists and medication questionnaire responses were collected in clinical interviews and categorized into 13 domains. Exposed participants reported fewer hours of sleep than controls (6.6 vs. 7.0). The exposed used significantly more medications than unexposed participants (82.2 % vs. 67.8 %) and, when adjusting for age, education, and personal income, also for pain (aOR = 2.40) and hypothyroidism (aOR = 7.03). Exposed participants with higher air-Mn concentrations, monitored for 10 years by the U.S. Environmental Protection Agency, were 1.5 times more likely to take pain medications. The exposed participants take significantly more medications than unexposed participants in the categories of hypothyroidism, pain, supplements, and total medications.
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Affiliation(s)
- Rosemarie M Bowler
- a Department of Psychology , San Francisco State University , San Francisco , CA , USA
| | - Shane W Adams
- a Department of Psychology , San Francisco State University , San Francisco , CA , USA
| | - Chris W Wright
- a Department of Psychology , San Francisco State University , San Francisco , CA , USA
| | - Yangho Kim
- b Department of Occupational and Environmental Medicine , Ulsan University Hospital, University of Ulsan College of Medicine , Ulsan , South Korea
| | - Andrew Booty
- c Department of Psychiatry , University of California San Francisco , San Francisco , CA , USA
| | | | - Vihra V Gocheva
- a Department of Psychology , San Francisco State University , San Francisco , CA , USA
| | - Danelle T Lobdell
- e National Health and Environmental Effects Research Laboratory , U.S. EPA , Research Triangle Park , NC , USA
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27
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Nduka JK, Onyenezi Amuka JP, Onwuka JC, Udowelle NA, Orisakwe OE. Human health risk assessment of lead, manganese and copper from scrapped car paint dust from automobile workshops in Nigeria. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:20341-20349. [PMID: 27449017 DOI: 10.1007/s11356-016-7219-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 07/08/2016] [Indexed: 06/06/2023]
Abstract
The economic downturn in Nigeria and Structural Adjustment Programme led to the flooding of Nigerian market with imported used automobiles. Most of these vehicles needed refurbishing and reworking. The present study is a human health risk assessment of metal exposure resulting from reworking of imported used vehicles in Nigeria. Scrap paint dusts from 56 Japanese made cars were collected from 8 different mechanic villages (workshops A-H] in Southeastern Nigeria. Scrap paints were homogenized, mixed, divided into fine particles and digested by standard method. The filtrates were assayed of lead, manganese and copper with atomic absorption spectrophotometry (AAS). Workshop B has the highest concentration of Pb (4.26 ± 0.93). Manganese in workshops A and F were (3.31 ± 0.85) and (3.04 ± 0.47) respectively and were higher than the levels from workshops C, B, D, G and H. Copper in workshop D (7.11 ± 0.21) was significantly greater than the other workshops. The highest hazard quotient (HQ) through ingestion, inhalation and dermal exposures in adults were 9.44E-05 (workshop B), 4.20E-01 (workshop B) and 1.08E-05 (workshop D) respectively. The highest values for HQ through ingestion, inhalation and dermal in children were 8.82E-04, 7.61E-01 and 2.86E-05 all in workshop B respectively. For children, the highest carcinogenic risk levels were 7.05E-08, 6.09E-05 and 2.29E-10 for ingestion, inhalation and dermal exposures respectively. In adults, the carcinogenic risk levels were 7.55E-09, 3.39E-05 and 8.67E-10 for ingestion, inhalation and dermal exposures respectively. Chronic exposure to scrap car paint dusts may be of significant public health importance in Nigeria as this may add to the body burden of some heavy metals.
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Affiliation(s)
- John Kanayochukwu Nduka
- Environmental Chemistry and Toxicology Research Unit, Pure and Industrial Chemistry Department, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria
- Department of Chemistry, Federal University, Lafia, Nasarawa State, Nigeria
| | - John Paul Onyenezi Amuka
- Environmental Chemistry and Toxicology Research Unit, Pure and Industrial Chemistry Department, Nnamdi Azikiwe University, Awka, Anambra State, Nigeria
| | | | - Nnaemeka Arinze Udowelle
- Toxicology Unit, Department of Experimental Pharmacology, Faculty of Pharmacy, University of Port-Harcourt, Port-Harcourt, Nigeria
| | - Orish Ebere Orisakwe
- Toxicology Unit, Department of Experimental Pharmacology, Faculty of Pharmacy, University of Port-Harcourt, Port-Harcourt, Nigeria.
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González-Merizalde MV, Menezes-Filho JA, Cruz-Erazo CT, Bermeo-Flores SA, Sánchez-Castillo MO, Hernández-Bonilla D, Mora A. Manganese and Mercury Levels in Water, Sediments, and Children Living Near Gold-Mining Areas of the Nangaritza River Basin, Ecuadorian Amazon. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2016; 71:171-82. [PMID: 27173830 DOI: 10.1007/s00244-016-0285-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 04/30/2016] [Indexed: 05/24/2023]
Abstract
Artisanal and small-scale gold-mining activities performed in mountain areas of the Southern Ecuadorian Amazon have incorporated several heavy metals into the aquatic systems, thus increasing the risk of exposure in populations living in adjacent zones. Therefore, the objective of this study was to evaluate the contamination levels of mercury (Hg) and manganese (Mn) in several rivers of the Nangaritza River basin and assess the exposure in school-aged children residing near the gold-mining zones. River water and sediment samples were collected from a highly contaminated (HEx) and a moderately contaminated (MEx) zones. Hair Mn (MnH) and urinary Hg (HgU) levels were determined in school-aged children living in both zones. High concentrations of dissolved Mn were found in river waters of the HEx zone (between 2660 and 3990 µg l(-1)); however, Hg levels, in general, were lower than the detection limit (DL; <1.0 µg l(-1)). Similarly, Mn levels in sediments were also increased (3090 to 4086 µg g(-1)). Median values of MnH in children of the HEx and MEx zones were 5.5 and 3.4 µg g(-1), respectively, whereas the median values of HgU concentrations in children living in the HEx and MEx zones were 4.4 and 0.62 µg g-creat(-1), respectively. Statistically significant differences were observed between both biomarkers in children from the HEx and MEx zones. In addition, boys presented significantly greater MnH levels in both zones. The greater MnH values were found in children living in alluvial areas, whereas children living in the high mountain areas, where some ore-processing plants are located close to or inside houses and schools, had the greater HgU concentrations. In summary, the data reported in this paper highlights that artisanal and small-scale gold-mining activities can not only produce mercurial contamination, that can also release other heavy metals (such as Mn) that may pose a risk to human health.
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Affiliation(s)
| | - José A Menezes-Filho
- Laboratory of Toxicology, College of Pharmacy, Federal University of Bahia, Salvador, Bahia, 40170-115, Brazil
| | | | | | | | | | - Abrahan Mora
- Investigador Prometeo, Universidad Nacional de Loja, La Argelia, Loja, Ecuador.
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Bowler RM, Beseler CL, Gocheva VV, Colledge M, Kornblith ES, Julian JR, Kim Y, Bollweg G, Lobdell DT. Environmental exposure to manganese in air: Associations with tremor and motor function. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 541:646-654. [PMID: 26437342 PMCID: PMC4803294 DOI: 10.1016/j.scitotenv.2015.09.084] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/19/2015] [Accepted: 09/16/2015] [Indexed: 05/20/2023]
Abstract
BACKGROUND Manganese (Mn) inhalation has been associated with neuropsychological and neurological sequelae in exposed workers. Few environmental epidemiologic studies have examined the potentially neurotoxic effects of Mn exposure in ambient air on motor function and hand tremor in adult community residents. Mn exposed residents were recruited in two Ohio towns: Marietta, a town near a ferro-manganese smelter, and East Liverpool, a town adjacent to a facility processing, crushing, screening, and packaging Mn products. METHODS Chronic (≥ 10 years) exposure to ambient air Mn in adult residents and effects on neuropsychological and neurological outcomes were investigated. Participants from Marietta (n=100) and East Liverpool (n=86) were combined for analyses. AERMOD dispersion modeling of fixed-site outdoor air monitoring data estimated Mn inhalation over a ten year period. Adult Mn-exposed residents' psychomotor ability was assessed using Finger Tapping, Hand Dynamometer, Grooved Pegboard, and the Computerized Adaptive Testing System (CATSYS) Tremor system. Bayesian structural equation modeling was used to assess associations between air-Mn and motor function and tremor. RESULTS Air-Mn exposure was significantly correlated in bivariate analyses with the tremor test (CATSYS) for intensity, center frequency and harmonic index. The Bayesian path analysis model showed associations of air-Mn with the CATSYS non-dominant center frequency and harmonic index; while the Bayesian structural equation model revealed associations between air-Mn and lower Finger Tapping scores. Household income was significantly associated with motor dysfunction but not with tremor. CONCLUSION Tremor and motor function were associated with higher exposure to airborne Mn.
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Affiliation(s)
- Rosemarie M Bowler
- San Francisco State University, Department of Psychology, San Francisco, CA, United States.
| | | | - Vihra V Gocheva
- San Francisco State University, Department of Psychology, San Francisco, CA, United States
| | | | - Erica S Kornblith
- California School of Professional Psychology at Alliant International University, San Francisco, CA, United States
| | | | - Yangho Kim
- Ulsan University Hospital, University of Ulsan College of Medicine, Department of Occupational and Environmental Medicine, Ulsan, South Korea
| | | | - Danelle T Lobdell
- U.S. EPA, National Health and Environmental Effects Research Laboratory, Research Triangle Park, NC, United States
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Shiue I. Urinary heavy metals, phthalates and polyaromatic hydrocarbons independent of health events are associated with adult depression: USA NHANES, 2011-2012. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:17095-17103. [PMID: 26126689 DOI: 10.1007/s11356-015-4944-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 06/22/2015] [Indexed: 06/04/2023]
Abstract
Links between environmental chemicals and human health have emerged, but the effects on mental health such as depression were less studied. Therefore, it was aimed to study the relationships between different sets of urinary environmental chemical concentrations and adult depression in a national and population-based setting in recent years. Data was retrieved from the US National Health and Nutrition Examination Survey in 2011-2012 including demographics, serum measurements, lifestyle factors, self-reported health conditions and urinary chemical concentrations. Depression was determined by using the Patient Health Questionnaire with a cutoff point at 9/10. Chi-square test, t test and survey-weighted logistic regression modeling were performed. Among 5560 American adults aged 20-80 years, 363 (7.8%) people were classified as having depression (Patient Health Questionnaire score ≥ 10). They tended to have history of health events. After full adjustment including urinary creatinine; demographic characteristics; lifestyle factors; health conditions (such as cardiovascular, neurological, respiratory, digestive and bone diseases, and injury); and subsample weighing; and higher levels of manganese, tin, and phthalates including mono-2-ethyl-5-carboxypentyl, mono-n-butyl, mono-isobutyl, and mono-benzyl were associated with adult depression. Similarly, urinary polyaromatic hydrocarbons including 2-hydroxyfluorene, 3-hydroxyfluorene, 9-hydroxyfluorene, 1-hydroxyphenanthrene, 2-hydroxyphenanthrene, 3-hydroxyphenanthrene, 1-hydroxypyrene, 1-hydroxynaphthalene (1-naphthol), 2-hydroxynaphthalene (2-naphthol) and 4-hydroxyphenanthrene were associated with depression. There were no associations observed in urinary arsenic, phenols, parabens, pesticides, perchlorate, nitrate, thiocyanate and polyfluorinated compounds. Urinary heavy metal, phthalates and polyaromatic hydrocarbons were associated with adult depression, being independent of health events. Further elimination of such harmful chemicals might need to be considered in future mental health and environmental policies.
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Affiliation(s)
- Ivy Shiue
- Faculty of Health and Life Sciences, Northumbria University, Benton, NE7 7XA, Newcastle upon Tyne, England, UK.
- Owens Institute for Behavioral Research, University of Georgia, Athens, GA, 30602, USA.
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Frisbie SH, Mitchell EJ, Sarkar B. Urgent need to reevaluate the latest World Health Organization guidelines for toxic inorganic substances in drinking water. Environ Health 2015; 14:63. [PMID: 26268322 PMCID: PMC4535738 DOI: 10.1186/s12940-015-0050-7] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 07/20/2015] [Indexed: 05/24/2023]
Abstract
The World Health Organization (WHO) has established guidelines for drinking-water quality that cover biological and chemical hazards from both natural and anthropogenic sources. In the most recent edition of Guidelines for Drinking-water Quality (2011), the WHO withdrew, suspended, did not establish, or raised guidelines for the inorganic toxic substances manganese, molybdenum, nitrite, aluminum, boron, nickel, uranium, mercury, and selenium. In this paper, we review these changes to the WHO drinking-water guidelines, examining in detail the material presented in the WHO background documents for each of these toxic substances. In some cases, these WHO background documents use literature reviews that do not take into account scientific research published within the last 10 or more years. In addition, there are instances in which standard WHO practices for deriving guidelines are not used; for example, rounding and other mathematical errors are made. According to published meeting reports from the WHO Chemical Aspects Working Group, the WHO has a timetable for revising some of its guidelines for drinking-water quality, but for many of these toxic substances the planned changes are minimal or will be delayed for as long as 5 years. Given the limited nature of the planned WHO revisions to the inorganic toxic substances and the extended timetable for these revisions, we suggest that governments, researchers, and other stakeholders might establish independent recommendations for inorganic toxic substances and possibly other chemicals to proactively protect public health, or at the very least, revert to previous editions of the Guidelines for Drinking-water Quality, which were more protective of public health.
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Affiliation(s)
- Seth H Frisbie
- Department of Chemistry and Biochemistry, Norwich University, Northfield, VT, USA.
| | - Erika J Mitchell
- Department of Chemistry and Biochemistry, Norwich University, Northfield, VT, USA.
| | - Bibudhendra Sarkar
- Department of Molecular Structure and Function, The Research Institute of The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.
- Department of Biochemistry, University of Toronto, Toronto, ON, Canada.
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Bowler RM, Kornblith ES, Gocheva VV, Colledge MA, Bollweg G, Kim Y, Beseler CL, Wright CW, Adams SW, Lobdell DT. Environmental exposure to manganese in air: Associations with cognitive functions. Neurotoxicology 2015; 49:139-48. [PMID: 26096496 DOI: 10.1016/j.neuro.2015.06.004] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 06/12/2015] [Accepted: 06/12/2015] [Indexed: 12/17/2022]
Abstract
Manganese (Mn), an essential element, can be neurotoxic in high doses. This cross-sectional study explored the cognitive function of adults residing in two towns (Marietta and East Liverpool, Ohio, USA) identified as having high levels of environmental airborne Mn from industrial sources. Air-Mn site surface emissions method modeling for total suspended particulate (TSP) ranged from 0.03 to 1.61 μg/m(3) in Marietta and 0.01-6.32 μg/m(3) in East Liverpool. A comprehensive screening test battery of cognitive function, including the domains of abstract thinking, attention/concentration, executive function and memory was administered. The mean age of the participants was 56 years (±10.8 years). Participants were mostly female (59.1) and primarily white (94.6%). Significant relationships (p<0.05) were found between Mn exposure and performance on working and visuospatial memory (e.g., Rey-O Immediate β=-0.19, Rey-O Delayed β=-0.16) and verbal skills (e.g., Similarities β=-0.19). Using extensive cognitive testing and computer modeling of 10-plus years of measured air monitoring data, this study suggests that long-term environmental exposure to high levels of air-Mn, the exposure metric of this paper, may result in mild deficits of cognitive function in adult populations.
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Affiliation(s)
- Rosemarie M Bowler
- San Francisco State University, Department of Psychology, 1600 Holloway Ave., San Francisco, CA 94132, USA.
| | - Erica S Kornblith
- California School of Professional Psychology at Alliant International University, 1 Beach St., Suite 100, San Francisco, CA 94133, USA
| | - Vihra V Gocheva
- San Francisco State University, Department of Psychology, 1600 Holloway Ave., San Francisco, CA 94132, USA
| | - Michelle A Colledge
- Agency for Toxic Substances and Disease Registry, Region 5, 77W. Jackson Blvd., MS ATSD-4J, Chicago, IL 60604, USA
| | - George Bollweg
- U.S. EPA Region 5, 77W. Jackson Blvd., AR 18-J, Chicago, IL 60604, USA
| | - Yangho Kim
- Ulsan University Hospital, University of Ulsan College of Medicine, Department of Occupational and Environmental Medicine, Ulsan 682-060, South Korea
| | - Cheryl L Beseler
- Colorado State University, 1879 Campus Delivery, Fort Collins, CO 80523, USA
| | - Chris W Wright
- San Francisco State University, Department of Psychology, 1600 Holloway Ave., San Francisco, CA 94132, USA
| | - Shane W Adams
- San Francisco State University, Department of Psychology, 1600 Holloway Ave., San Francisco, CA 94132, USA
| | - Danelle T Lobdell
- U.S. EPA, National Health and Environmental Effects Research Laboratory, MD 58A, Research Triangle Park, NC 27711, USA
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Hoet P, Roels HA. Significance and Usefulness of Biomarkers of Exposure to Manganese. MANGANESE IN HEALTH AND DISEASE 2014. [DOI: 10.1039/9781782622383-00355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Manganese (Mn) accomplishes functions essential to maintaining human health, but at the same time this trace element can be toxic at low levels of exposure and accurate estimation of internal exposure is needed. A biomarker of exposure to Mn is meaningful only if there is sufficient knowledge of the toxicokinetics determining its presence in a biological medium (e.g. whole blood, plasma, urine, hair, nail). Moreover, biological monitoring of exposure to Mn is useful only when the biomarker is sufficiently specific and sensitive to distinguish exposed from non-exposed subjects, when it is dose-related to the external exposure (current, recent, or time-integrated), and when it displays reasonable dose–effect/response relationships with the occurrence of adverse effects on the central nervous system, the critical target for Mn exposure. Human investigations in which biomarkers of Mn exposure meet all these criteria are hard to locate. Overall, the available studies report poor or no associations on an individual basis between external (Mn in air or drinking water) and internal (Mn in blood, urine, hair, or nail) Mn exposure indices. This may be to some extent explained by features inherent of the Mn metabolism (homeostatic control), the Mn biomarker's half-life with respect to the exposure window, and the variable nature of external exposure scenarios. Studies particularly dealing with Mn inhalation exposure, different or poorly described methodological approaches, or air sampling strategies may render direct comparison and interpretation of results a tedious task. Nevertheless, several studies report significant dose–effect associations between biomarkers of Mn exposure and subclinical deficits of psychomotor or neuropsychological test performances. Because directly associated with the site of toxic action and providing the magnetic resonance imaging is done no later than three months after Mn exposure ceased, the Mn T1 relaxation time is potentially the better biomarker of Mn exposure in a clinical context (e.g. after long-term parenteral nutrition, chronic liver failure, methcathinone drug abuse). Magnetic resonance imaging is, however, unpractical as a tool for biological monitoring of exposure to Mn in the occupational setting (inhalation) and in the general population (air, drinking water). In conclusion, it would be inappropriate to recommend, on the basis of the currently available evidence, a reliable well-validated biomarker of exposure to Mn, or to establish a health-based threshold value for subclinical neurotoxic effects.
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Affiliation(s)
- Perrine Hoet
- Université catholique de Louvain (UCL), Institut de Recherche Expérimentale et Clinique (IREC), Louvain Centre for Toxicology and Applied Pharmacology (LTAP) Bruxelles Belgium
| | - Harry A. Roels
- Université catholique de Louvain (UCL), Institut de Recherche Expérimentale et Clinique (IREC), Louvain Centre for Toxicology and Applied Pharmacology (LTAP) Bruxelles Belgium
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Chen P, Chakraborty S, Peres TV, Bowman AB, Aschner M. Manganese-induced Neurotoxicity: From C. elegans to Humans. Toxicol Res (Camb) 2014; 4:191-202. [PMID: 25893090 DOI: 10.1039/c4tx00127c] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Manganese (Mn) is one of the most abundant metals on the earth. It is required for normal cellular activities, but overexposure leads to toxicity. Neurons are more susceptible to Mn-induced toxicity than other cells, and accumulation of Mn in the brain results in Manganism that presents with Parkinson's disease (PD)-like symptoms. In the last decade, a number of Mn transporters have been identified, which improves our understanding of Mn transport in and out of cells. However, the mechanism of Mn-induced neurotoxicity is only partially uncovered, with further research needed to explore the whole picture of Mn-induced toxicity. In this review, we will address recent progress in Mn-induced neurotoxicity from C. elegans to humans, and explore future directions that will help understand the mechanisms of its neurotoxicity.
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Affiliation(s)
- Pan Chen
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Sudipta Chakraborty
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Tanara V Peres
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA ; Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Aaron B Bowman
- Department of Neurology, Vanderbilt University Medical Center, Nashville TN, USA
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
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Młyniec K, Gaweł M, Doboszewska U, Starowicz G, Pytka K, Davies CL, Budziszewska B. Essential elements in depression and anxiety. Part II. Pharmacol Rep 2014; 67:187-94. [PMID: 25712638 DOI: 10.1016/j.pharep.2014.09.009] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 09/15/2014] [Accepted: 09/16/2014] [Indexed: 12/21/2022]
Abstract
In this paper we continue to discuss the involvement of essential elements in depression and anxiety, and the possible mechanisms that link elements to the neurobiology underlying depression/anxiety. The present paper is focused on copper, selenium, manganese, iodine and vanadium. Different aspects of relationship between elements and depression or anxiety are reviewed, e.g. the association of the amount of an element in a diet or the serum level of an element and depressive or anxiety-like symptoms. Moreover, the relation of selected elements to the pathophysiology of depression or anxiety is discussed in the context of enzymes which require these elements as co-factors and are involved in the underlying pathophysiology of these disorders.
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Affiliation(s)
- Katarzyna Młyniec
- Department of Biochemical Toxicology, Jagiellonian University Medical College, Kraków, Poland.
| | - Magdalena Gaweł
- Department of Radioligands, Jagiellonian University Medical College, Kraków, Poland
| | - Urszula Doboszewska
- Department of Pharmacobiology, Jagiellonian University Medical College, Kraków, Poland; Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
| | - Gabriela Starowicz
- Department of Pharmacobiology, Jagiellonian University Medical College, Kraków, Poland
| | - Karolina Pytka
- Department of Pharmacology, Jagiellonian University Medical College, Kraków, Poland
| | - Claire Linzi Davies
- Neurobiology Division, The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, Scotland, UK
| | - Bogusława Budziszewska
- Department of Biochemical Toxicology, Jagiellonian University Medical College, Kraków, Poland; Institute of Pharmacology, Polish Academy of Sciences, Kraków, Poland
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Guarneros M, Ortiz-Romo N, Alcaraz-Zubeldia M, Drucker-Colin R, Hudson R. Nonoccupational Environmental Exposure to Manganese is Linked to Deficits in Peripheral and Central Olfactory Function. Chem Senses 2013; 38:783-91. [DOI: 10.1093/chemse/bjt045] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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Torres-Agustín R, Rodríguez-Agudelo Y, Schilmann A, Solís-Vivanco R, Montes S, Riojas-Rodríguez H, Cortez-Lugo M, Ríos C. Effect of environmental manganese exposure on verbal learning and memory in Mexican children. ENVIRONMENTAL RESEARCH 2013; 121:39-44. [PMID: 23141434 DOI: 10.1016/j.envres.2012.10.007] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 10/11/2012] [Accepted: 10/15/2012] [Indexed: 05/20/2023]
Abstract
Manganese (Mn) is an essential metal, but in excess it becomes neurotoxic. Children's developing nervous system may be especially vulnerable to the neurotoxic effects of overexposure to this metal. The aim of this study was to assess the effect of Mn exposure on verbal memory and learning in 7- to 11-year-old children. We tested 79 children living in the Molango Mn-mining district and 95 children from a non-exposed community in the same State of Mexico. The Children's Auditory Verbal Learning Test (CAVLT) was administered. Blood and hair samples were obtained to determine Mn concentrations using atomic absorption spectrophotometry. CAVLT performance was compared between the two groups and multilevel regression models were constructed to estimate the association between biomarkers of Mn exposure and the CAVLT scores. The exposed group presented higher hair and blood Mn (p<0.001) than the non-exposed group (median 12.6 vs. 0.6μg/g, 9.5vs. 8.0μg/L respectively), as well as lower scores (p<0.001) for all the CAVLT subscales. Hair Mn was inversely associated with most CAVLT subscales, mainly those evaluating long-term memory and learning (β=-0.47, 95% CI -0.84, -0.09). Blood Mn levels showed a negative but non-significant association with the CAVLT scores. These results suggest that Mn exposure has a negative effect on children's memory and learning abilities.
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Affiliation(s)
- R Torres-Agustín
- Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, Departamento de Neuropsicología, Mexico
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Hoffman L, Hardej D. Ethylene bisdithiocarbamate pesticides cause cytotoxicity in transformed and normal human colon cells. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2012; 34:556-573. [PMID: 22824503 DOI: 10.1016/j.etap.2012.06.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Accepted: 06/25/2012] [Indexed: 06/01/2023]
Abstract
The effects of the fungicides Maneb, Mancozeb, and Zineb were investigated in transformed colon cells, HT-29, Caco2 and non-transformed cells, CCD-18Co. Significant decreases in viability were observed with Maneb and Mancozeb in HT-29 and CCD-18Co (80-260μM), and Caco2 cells (40-180μM). No significant decreases in viability were observed in all cell types up to 800μM with Zineb. MnCl(2) and ZnCl(2) exposure produced no loss of viability in all cell types up to 400μM. Light microscopy confirmed viability analysis. Lipid peroxidation was observed with Maneb and Mancozeb in cell types tested (60-200μM). Caspase 3/7, 8, and 9 activities were observed with Maneb and Mancozeb in cell types tested (40-200μM). Maneb and Mancozeb treated HT-29 and Caco2 cells demonstrated increases in manganese and zinc concentrations (20-200μM). The lack of toxicity observed with Zineb, MnCl(2), and ZnCl(2) suggests that both the metal moiety and the organic portion of these fungicides together contribute to toxicity.
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Affiliation(s)
- Lisa Hoffman
- Department of Pharmaceutical Sciences, College of Pharmacy and Allied Health Professions, St. John's University, Jamaica, NY 11439, USA
| | - Diane Hardej
- Department of Pharmaceutical Sciences, College of Pharmacy and Allied Health Professions, St. John's University, Jamaica, NY 11439, USA.
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Frisbie SH, Mitchell EJ, Dustin H, Maynard DM, Sarkar B. World Health Organization discontinues its drinking-water guideline for manganese. ENVIRONMENTAL HEALTH PERSPECTIVES 2012; 120:775-8. [PMID: 22334150 PMCID: PMC3385445 DOI: 10.1289/ehp.1104693] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Accepted: 02/14/2012] [Indexed: 05/18/2023]
Abstract
BACKGROUND The World Health Organization (WHO) released the fourth edition of Guidelines for Drinking-Water Quality in July 2011. In this edition, the 400-µg/L drinking-water guideline for manganese (Mn) was discontinued with the assertion that because "this health-based value is well above concentrations of manganese normally found in drinking water, it is not considered necessary to derive a formal guideline value." OBJECTIVE In this commentary, we review the WHO guideline for Mn in drinking water--from its introduction in 1958 through its discontinuation in 2011. METHODS For the primary references, we used the WHO publications that documented the Mn guidelines. We used peer-reviewed journal articles, government reports, published conference proceedings, and theses to identify countries with drinking water or potential drinking-water supplies exceeding 400 µg/L Mn and peer-reviewed journal articles to summarize the health effects of Mn. DISCUSSION Drinking water or potential drinking-water supplies with Mn concentrations > 400 µg/L are found in a substantial number of countries worldwide. The drinking water of many tens of millions of people has Mn concentrations > 400 µg/L. Recent research on the health effects of Mn suggests that the earlier WHO guideline of 400 µg/L may have been too high to adequately protect public health. CONCLUSIONS The toxic effects and geographic distribution of Mn in drinking-water supplies justify a reevaluation by the WHO of its decision to discontinue its drinking-water guideline for Mn.
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Affiliation(s)
- Seth H Frisbie
- Department of Chemistry and Biochemistry, Norwich University, Northfield, Vermont, USA
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Catalán-Vázquez M, Riojas-Rodríguez H, Pelcastre-Villafuerte BE. Risk perception and social participation among women exposed to manganese in the mining district of the state of Hidalgo, Mexico. THE SCIENCE OF THE TOTAL ENVIRONMENT 2012; 414:43-52. [PMID: 22094101 DOI: 10.1016/j.scitotenv.2011.09.079] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Revised: 09/23/2011] [Accepted: 09/28/2011] [Indexed: 05/31/2023]
Abstract
OBJECTIVE To analyze the importance attributed to manganese (Mn) in the health-disease-death process and possibilities for participation in risk management of women from two communities who live near the plant in the Molango mining district. MATERIALS AND METHODS Qualitative study based on 6 focus groups with women of different ages. Audio recordings were made of the sessions, after verbal informed consent, and were transcribed with a word processor. The analysis was conducted according to theme, taking into account the age group and community to which the women belonged, using the Atlas-ti (v.5.0) program. RESULTS The youngest women from Chiconcoac attribute the cause of headaches and chest pain to manganese, while women from the Tolago community believe it exacerbates disease in general. Women between 31 and 40 years old from Chiconcoac attribute the cause of "brain" pain, burning eyes and coughs to manganese, and those in Tolago report that it causes memory problems. The oldest women in Tolago believe Mn causes learning difficulties and affects children's growth and development. The women of all ages in Tolago believe that Mn has decreased the production of fruit and vegetables in the region. Some of the obstacles to participation in risk management are: women are not allowed to attend meetings at which men discuss the Mn problem and they perceive the mine as a source of employment for the community. CONCLUSIONS The women perceive Mn to have serious effects on health and the local environment and have fewer opportunities than men to participate in risk management. Some of the health consequences attributed to Mn are consistent with those reported by neurological studies, nevertheless, other risks are overestimated. Spaces for communication need to be created to listen to the women's interests and concerns and empower them to participate in the risk management plan.
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Affiliation(s)
- Minerva Catalán-Vázquez
- Departamento de Investigación en Epidemiología Clínica, Instituto Nacional de Enfermedades Respiratorias, Distrito Federal, Mexico.
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Montes S, Schilmann A, Riojas-Rodriguez H, Rodriguez-Agudelo Y, Solis-Vivanco R, Rodriguez-Dozal SL, Tristan-López LA, Rios C. Serum prolactin rises in Mexican school children exposed to airborne manganese. ENVIRONMENTAL RESEARCH 2011; 111:1302-1308. [PMID: 22001219 DOI: 10.1016/j.envres.2011.09.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2011] [Revised: 08/24/2011] [Accepted: 09/27/2011] [Indexed: 05/31/2023]
Abstract
Early studies on manganese (Mn) exposure have shown that this transition metal affects dopamine neurotransmission. Dopamine serves as a tonic inhibitor of prolactin release in the anterior hypophysis, thus the serum prolactin levels in occupationally Mn exposed workers has been found increased. However, little is known about environmental Mn exposure effect on this hormone. In the present study we assessed serum prolactin in environmentally (mainly through air) exposed children living in the proximity of a rich Mn zone in Mexico and a control group with similar socioeconomic and ethnic characteristics. We also determined Mn levels in blood and hair, hemoglobin and anthropometric variables. Children between 7 and 11 years old were included (77 from Mn exposed and 93 from control communities). Blood Mn was higher in exposed children (median 9.5 μg/L, rank [5.5, 18]) as compared to the control group (median 8 μg/L, rank [5, 14]) (p<0.05, Mann-Whitney). Hair Mn was also increased in the exposed group (median 13.2 μg/g, rank [4.2, 48]) in comparison to the control group (median 0.6 μg/g rank [0.06, 3.6]). Prolactin was found increased in the exposed children (median 12.35 ng/ml, rank [2.90, 33.70]) versus controls (median 7.77 ng/ml, rank [2.7, 23.6]). Positive correlations were found between prolactin and both blood Mn and hair Mn (Rho=0.217 and 0.250, respectively, p<0.05). A linear regression, with prolactin as the dependent variable, showed hair Mn as the determinant variable after adjusting by age, hemoglobin and sex. After a stratification of hair and blood Mn into low, medium and high content, significant associations were also found, confirming the relationship between prolactin and hair Mn. Results suggest that children from these Mn environmentally exposed communities could be at risk of endocrine alterations.
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Affiliation(s)
- S Montes
- Neurochemistry Department, National Institute of Neurology and Neurosurgery, Manuel Velasco Suarez, Insurgentes sur No.3877, La Fama, Tlapan, D.F. Mexico, Mexico
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Environmental exposure to manganese and motor function of children in Mexico. Neurotoxicology 2011; 32:615-21. [PMID: 21871921 DOI: 10.1016/j.neuro.2011.07.010] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 07/23/2011] [Accepted: 07/23/2011] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Occupational manganese (Mn) exposure has been associated with motor deficits in adult workers, but data on the potential effects of environmental exposure to Mn on the developing motor function for a children population is scarce. The aim of this study was to evaluate the association between exposure to Mn and motor function of school aged children. METHODS We conducted a cross-sectional study selecting 195 children (100 exposed and 95 unexposed) between 7 and 11 years old. The following tests were used to evaluate the motor function: Grooved pegboard, finger tapping, and Santa Ana test. Mn exposure was assessed by blood (MnB) and hair concentrations (MnH). We constructed linear regression models to evaluate the association between exposure to Mn and the different test scores adjusting for age, sex, maternal education, hemoglobin and blood lead. RESULTS The median concentration of MnH and MnB was significantly higher in exposed (12.6 μg/g and 9.5 μg/L) compared to unexposed children (0.6 μg/g and 8.0 μg/L). The exposed children on average performed the grooved pegboard test faster, but made more errors, although these results did not reach statistical significance with neither one of the Mn exposure biomarkers. MnB showed an inverse association on the execution of the finger tapping test (average in 5 trials β -0.4, p=0.02), but no association was observed with MnH. CONCLUSIONS A subtle negative association of Mn exposure on motor speed and coordination was shown. In adults, the main effect of environmental Mn exposure has been associated with motor skills, but these results suggest that such alterations are not the main effect on children.
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Duka YD, Ilchenko SI, Kharytonov MM, Vasylyeva TL. Impact of open manganese mines on the health of children dwelling in the surrounding area. EMERGING HEALTH THREATS JOURNAL 2011; 4:7110. [PMID: 24149028 PMCID: PMC3166881 DOI: 10.3402/ehtj.v4i0.7110] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/23/2010] [Revised: 07/09/2010] [Accepted: 10/27/2010] [Indexed: 11/14/2022]
Abstract
Introduction: Chronic manganese (Mn) exposure is a health hazard associated with the mining and processing of Mn ores. Children living in an area with increased environmental exposure to Mn may have symptoms of chronic toxicity that are different from adults who experience occupational exposure. The aim of the study was to compare health outcomes in a pediatric population living near open Mn mines with a group of children from a reference area and then to develop and implement preventive/rehabilitation measures to protect the children in the mining region. Methods: After environmental assessment, a group of 683 children living in a Mn-rich region of Ukraine were screened by clinical evaluation, detection of sIgA (37 children), micronucleus analysis (56 children), and hair Mn content (166 children). Results: Impaired growth and rickets-like skeletal deformities were observed in 33% of the children. This was a significantly higher percentage than in children in the reference region (15%). The children from the Mn-mining region also had increased salivary levels of immunoglobulin A (104.4±14.2 mcg/ml vs. 49.7±6.1 mcg/ml among the controls (p<0.05), increased serum alpha 1 proteinase inhibitor levels (4.93±0.21 g/l compared with 2.91±0.22 g/l for controls; p<0.001) and greater numbers of micronuclei in the mucous cells of the oral cavity (0.070±0.008 vs. 0.012±0.009, p<0.001). Conclusions: These findings indicate the deleterious health consequences of living in a Mn-mining area. Medical rehabilitation programs were conducted and produced positive results, but further validation of their effectiveness is required. The study provided background information to formulate evidence-based decisions about public health in a region of high Mn exposure.
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Affiliation(s)
- Ykateryna D Duka
- Department of Propedeutics of Children Diseases, Dnipropetrovsk State Medical Academy, Dnipropetrovsk, Ukraine
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Menezes-Filho JA, Novaes CDO, Moreira JC, Sarcinelli PN, Mergler D. Elevated manganese and cognitive performance in school-aged children and their mothers. ENVIRONMENTAL RESEARCH 2011; 111:156-63. [PMID: 20943219 PMCID: PMC3026060 DOI: 10.1016/j.envres.2010.09.006] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Revised: 09/09/2010] [Accepted: 09/16/2010] [Indexed: 05/17/2023]
Abstract
BACKGROUND Growing evidence suggests that excess manganese (Mn) in children is associated with neurobehavioral impairments. In Brazil, elevated hair Mn concentrations were reported in children living near a ferro-manganese alloy plant. OBJECTIVES We investigated these children's and caregivers' cognitive function in relation to bioindicators of Mn exposure. METHODS In this cross-sectional study, the WISC-III was administered to 83 children aged between 6 and 12 years; the Raven Progressive Matrix was administered to the primary caregivers (94% mothers), who likewise responded to a questionnaire on socio demographics and birth history. Mn in hair (MnH) and blood (MnB) and blood lead (PbB) were measured by graphite furnace atomic absorption spectrometry (GFAAS). RESULTS Children's mean MnB and MnH were 8.2 μg/L (2.7-23.4) and 5.83 μg/g (0.1-86.68), respectively. Mean maternal MnH was 3.50 μg/g (0.10-77.45) and correlated to children's MnH (rho=0.294, p=0.010). Children's MnH was negatively related to Full-Scale Intelligence Quotient (IQ) and Verbal IQ; β coefficients for MnH were -5.78 (95% CI -10.71 to -0.21) and -6.72 (-11.81 to -0.63), adjusted for maternal education and nutritional status. Maternal MnH was negatively associated with performance on the Raven's (β=-2.69, 95% CI -5.43 to 0.05), adjusted for education years, family income and age. CONCLUSIONS These findings confirm that high MnH in children is associated with poorer cognitive performance, especially in the verbal domain. Primary caregiver's IQ is likewise associated to Mn exposure, suggesting that, in this situation, children's cognition may be affected directly and indirectly by Mn exposure.
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Affiliation(s)
- José A Menezes-Filho
- Laboratory of Toxicology, College of Pharmacy, Federal University of Bahia, Brazil.
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Millimolar Mn2+ influences agonist binding to 5-HT1A receptors by inhibiting guanosine nucleotide binding to receptor-coupled G-proteins. Neurotoxicology 2010; 32:25-30. [PMID: 21126535 DOI: 10.1016/j.neuro.2010.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Revised: 11/12/2010] [Accepted: 11/23/2010] [Indexed: 12/16/2022]
Abstract
Manganese is an essential trace element but its overexposure causes poisoning (called manganism) that shares several symptoms with Parkinson's disease, but with a mechanism that is still not well understood: in addition to involvement of the dopaminergic system, both serotonergic and peptiergic systems have been implicated. In the present report we have studied the influence of Mn(2+) on 5-HT(1A) receptor signaling complexes in rat brain and found that Mn(2+) in millimolar concentration caused an increase of high-affinity agonist binding to rat hippocampal membranes in comparison with experiments in the presence of Mg(2+), but not in rat cortical membranes and in Sf9 cell membranes expressing 5-HT(1A) receptors and G(i1) heterotrimers. Activation of G proteins with 30μM GTPγS turned all 5-HT(1A) receptors in these preparations into a low-affinity state for agonist binding in the presence of 1mM Mg(2+), but not in the presence of 1mM Mn(2+) in rat hippocampal membranes. However, if 1μM GTPγS was used for G protein activation, a substantial amount of high affinity agonist binding was detected in the presence of Mn(2+) also in cortical membranes and Sf9 cells, but not with Mg(2+) or EDTA. Comparison of the abilities of GDP and GTPγS to modulate high affinity agonist binding to 5-HT(1A) receptors indicated that both nucleotides were almost 10-fold less potent in the presence of MnCl(2) compared to MgCl(2). This means that by inhibiting guanosine nucleotide binding to G proteins in complex with 5-HT(1A) receptors, Mn(2+) acts as an enhancer for agonist binding and signal transduction. As the influence of Mn(2+) resembles the hypersensitivity of dopaminergic system in Parkinsonial models, it can be proposed that at least some symptoms of manganism are connected with a change of signal transduction complex caused by manganese-nucleotide complexes.
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Riojas-Rodríguez H, Solís-Vivanco R, Schilmann A, Montes S, Rodríguez S, Ríos C, Rodríguez-Agudelo Y. Intellectual function in Mexican children living in a mining area and environmentally exposed to manganese. ENVIRONMENTAL HEALTH PERSPECTIVES 2010; 118:1465-70. [PMID: 20936744 PMCID: PMC2957930 DOI: 10.1289/ehp.0901229] [Citation(s) in RCA: 173] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Accepted: 06/01/2010] [Indexed: 05/20/2023]
Abstract
BACKGROUND Excessive exposure to manganese (Mn), an essential trace element, has been shown to be neurotoxic, especially when inhaled. Few studies have examined potential effects of Mn on cognitive functions of environmentally exposed children. OBJECTIVE This study was intended to estimate environmental exposure to Mn resulting from mining and processing and to explore its association with intellectual function of school-age children. METHODS Children between 7 and 11 years of age from the Molango mining district in central Mexico (n = 79) and communities with similar socioeconomic conditions that were outside the mining district (n = 93) participated in the cross-sectional evaluation. The revised version of the Wechsler Intelligence Scale for Children adapted for the Mexican population was applied. Concentrations of Mn in blood (MnB) and hair (MnH) were used as biomarkers of exposure. RESULTS Exposed children had significantly higher median values for MnH (12.6 μg/g) and MnB (9.5 μg/L) than did nonexposed children (0.6 μg/g and 8.0 μg/L, respectively). MnH was inversely associated with Verbal IQ [β = -0.29; 95% confidence interval (CI), -0.51 to -0.08], Performance IQ (β = -0.08; 95% CI, -0.32 to 0.16), and Total Scale IQ (β = -0.20; 95% CI, -0.42 to 0.02). MnB was inversely but nonsignificantly associated with Total and Verbal IQ score. Age and sex significantly modified associations of MnH, with the strongest inverse associations in young girls and little evidence of associations in boys at any age. Associations with MnB did not appear to be modified by sex but appeared to be limited to younger study participants. CONCLUSIONS The findings from this study suggest that airborne Mn environmental exposure is inversely associated with intellectual function in young school-age children.
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Affiliation(s)
| | | | - Astrid Schilmann
- Dirección de Salud Ambiental, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | - Sergio Montes
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía “Manuel Velasco Suárez,” Mexico City, Mexico
| | - Sandra Rodríguez
- Dirección de Salud Ambiental, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | - Camilo Ríos
- Departamento de Neuroquímica, Instituto Nacional de Neurología y Neurocirugía “Manuel Velasco Suárez,” Mexico City, Mexico
| | - Yaneth Rodríguez-Agudelo
- Departamento de Neuropsicología and
- Address correspondence to Y. Rodríguez-Agudelo, Departamento de Neuropsicología, Instituto Nacional de Neurología y Neurocirugía “Manuel Velasco Suárez,” Insurgentes Sur 3877, Col. La Fama, Del. Tlalpan, C.P. 14269 Mexico City, Mexico. Telephone/Fax: 52-55-55287878. E-mail:
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Catalán-Vázquez M, Schilmann A, Riojas-Rodríguez H. Perceived health risks of manganese in the Molango Mining District, Mexico. RISK ANALYSIS : AN OFFICIAL PUBLICATION OF THE SOCIETY FOR RISK ANALYSIS 2010; 30:619-634. [PMID: 20345581 DOI: 10.1111/j.1539-6924.2010.01377.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A series of investigations, using an ecosystem approach to human health, have been conducted in the Molango Mining District in the state of Hidalgo, Mexico. Given that risk perception plays a key role in the public response to environmental exposures, it is important to recognize the perceived health risks of manganese (Mn). The aim of this study was to analyse the Mn risk perception by describing the attitudes of adult residents toward their communities, assessing the importance they give to environmental problems, including Mn, and their recognition of the links established between Mn and health-illness-death. A quantitative study based on interviewer-administered questionnaires was conducted. A sample of 402 residents was randomly selected from six communities at different distances from the mines and/or Mn processing plants. Descriptive statistics and logistic regression models were used to identify Mn risk perception predictors. The results show that roughly 30% of the residents identified mining activities and the resultant pollution as their most important concern. This proportion is greater in communities that have processing plants within them. More than 70% perceive a high Mn pollution regionally, but this proportion decreases when the residents attribute the pollution to their home area. More than 20% of the adults interviewed associated Mn exposure with their own illness, mainly "lungs" and "sight." Factors influencing Mn risk perception are community of residence, age group (41-60), and the report of having a chronic illness. The risk management plan for the mining district must take into account these differences to have a greater local impact.
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Affiliation(s)
- Minerva Catalán-Vázquez
- Departamento de Epidemiología Clínica, Instituto Nacional de Enfermedades Respiratorias, Distrito Federal, México.
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