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Lyall K, Westlake M, Musci RJ, Gachigi K, Barrett ES, Bastain TM, Bush NR, Buss C, Camargo CA, Croen LA, Dabelea D, Dunlop AL, Elliott AJ, Ferrara A, Ghassabian A, Gern JE, Hare ME, Hertz-Picciotto I, Hipwell AE, Hockett CW, Karagas MR, Lugo-Candelas C, O'Connor TG, Schmidt RJ, Stanford JB, Straughen JK, Shuster CL, Wright RO, Wright RJ, Zhao Q, Oken E. Association of maternal fish consumption and ω-3 supplement use during pregnancy with child autism-related outcomes: results from a cohort consortium analysis. Am J Clin Nutr 2024:S0002-9165(24)00585-9. [PMID: 38960320 DOI: 10.1016/j.ajcnut.2024.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 05/15/2024] [Accepted: 06/26/2024] [Indexed: 07/05/2024] Open
Abstract
BACKGROUND Prenatal fish intake is a key source of omega-3 (ω-3) polyunsaturated fatty acids needed for brain development, yet intake is generally low, and studies addressing associations with autism spectrum disorder (ASD) and related traits are lacking. OBJECTIVE This study aimed to examine associations of prenatal fish intake and ω-3 supplement use with both autism diagnosis and broader autism-related traits. METHODS Participants were drawn from 32 cohorts in the Environmental influences on Child Health Outcomes Cohort Consortium. Children were born between 1999 and 2019 and part of ongoing follow-up with data available for analysis by August 2022. Exposures included self-reported maternal fish intake and ω-3/fish oil supplement use during pregnancy. Outcome measures included parent report of clinician-diagnosed ASD and parent-reported autism-related traits measured by the Social Responsiveness Scale (SRS)-second edition (n = 3939 and v3609 for fish intake analyses, respectively; n = 4537 and n = 3925 for supplement intake analyses, respectively). RESULTS In adjusted regression models, relative to no fish intake, fish intake during pregnancy was associated with reduced odds of autism diagnosis (odds ratio: 0.84; 95% confidence interval [CI]: 0.77, 0.92), and a modest reduction in raw total SRS scores (β: -1.69; 95% CI: -3.3, -0.08). Estimates were similar across categories of fish consumption from "any" or "less than once per week" to "more than twice per week." For ω-3 supplement use, relative to no use, no significant associations with autism diagnosis were identified, whereas a modest relation with SRS score was suggested (β: 1.98; 95% CI: 0.33, 3.64). CONCLUSIONS These results extend previous work by suggesting that prenatal fish intake, but not ω-3 supplement use, may be associated with lower likelihood of both autism diagnosis and related traits. Given the low-fish intake in the United States general population and the rising autism prevalence, these findings suggest the need for better public health messaging regarding guidelines on fish intake for pregnant individuals.
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Affiliation(s)
- Kristen Lyall
- AJ Drexel Autism Institute, Drexel University, Philadelphia, PA, United States.
| | | | - Rashelle J Musci
- Department of Mental Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Kennedy Gachigi
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Emily S Barrett
- Department of Biostatistics and Epidemiology, Rutgers University School of Public Health, Environmental and Occupational Health Sciences Institute, Piscataway, NJ, United States
| | - Theresa M Bastain
- Department of Population and Public Health Sciences, University of Southern California, Los Angeles, CA, United States
| | - Nicole R Bush
- Department of Psychiatry and Behavioral Sciences, Department of Pediatrics, University of California San Francisco, San Francisco, CA, United States
| | - Claudia Buss
- UC Irvine Medical Center, Orange, CA, United States
| | - Carlos A Camargo
- Department of Emergency Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States
| | - Lisa A Croen
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, United States
| | - Dana Dabelea
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Anne L Dunlop
- Department of Gynecology & Obstetrics, Emory University School of Medicine, Atlanta, GA, United States
| | - Amy J Elliott
- Avera Research Institute, Sioux Falls, SD, United States; Department of Pediatrics, University of South Dakota Sanford School of Medicine, Vermillion, SD, United States
| | - Assiamira Ferrara
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, United States
| | - Akhgar Ghassabian
- Department of Pediatrics, New York University Grossman School of Medicine, New York, NY, United States
| | - James E Gern
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States
| | - Marion E Hare
- Department of Preventive Medicine, College of Medicine, University of Health Science Center, Memphis, TN, United States
| | - Irva Hertz-Picciotto
- Department of Public Health Sciences, University of California Davis, Davis, CA, United States
| | - Alison E Hipwell
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, United States
| | - Christine W Hockett
- Avera Research Institute, Sioux Falls, SD, United States; Department of Pediatrics, University of South Dakota Sanford School of Medicine, Vermillion, SD, United States
| | - Margaret R Karagas
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
| | - Claudia Lugo-Candelas
- New York State Psychiatric Institute, Columbia University Irving Medical Center, New York, NY, United States
| | - Thomas G O'Connor
- Departments of Psychiatry, Psychology, Neuroscience, Obstetrics and Gynecology, University of Rochester, Rochester, NY, United States
| | - Rebecca J Schmidt
- Department of Public Health Sciences, University of California Davis, Davis, CA, United States
| | - Joseph B Stanford
- Department of Family and Preventative Medicine, University of Utah, Salt Lake City, UT, United States
| | - Jennifer K Straughen
- Department of Public Health Sciences, Henry Ford Health, Detroit, MI, United States
| | - Coral L Shuster
- Brown Center for the Study of Children at Risk, Women and Infants Hospital, Providence, RI, United States
| | - Robert O Wright
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Rosalind J Wright
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Qi Zhao
- Department of Preventive Medicine, College of Medicine, University of Health Science Center, Memphis, TN, United States
| | - Emily Oken
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, United States
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Mercan S, Kilic MD, Zengin S, Yayla M. Experimental study for inorganic and organic profiling of toy makeup products: Estimating the potential threat to child health. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:33975-33992. [PMID: 38696006 PMCID: PMC11136717 DOI: 10.1007/s11356-024-33362-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 04/12/2024] [Indexed: 05/31/2024]
Abstract
Inorganic elements are added to toys as impurities to give desired stability, brightness, flexibility, and color; however, these elements may cause numerous health issues after acute or chronic exposure. In this study, the inorganic profile of 14 elements (Al, As, Ba, Cd, Co, Cr, Cu, Hg, Mn, Ni, Se, Sb, Pb, and Zn) in 63 toy makeup products was identified by inductively coupled plasma-mass spectrometry after microwave acid digestion method. Additionally, organic allergen fragrance was investigated by gas chromatography-mass spectrometry. The systemic exposure dosage (SED), margin of safety (MoS), lifetime cancer risk (LCR), hazard quotient (HQ), and hazard indices were used to assess the safety evaluation. Then, 57 out of 63 samples (90.48%) exceeded the limits at least for one toxic element with descending order Ni > Cr > Co > Pb > Sb > Cd > As > Hg. The SED values were compared with tolerable daily intake values and remarkably differences were found for Al and Pb. The MoS values for 57.15% of samples exceeded the limit value for Al, As, Cd, Co, Hg, Mn, Sb, and Zn elements. The LCR values were observed at 100% (n = 63), 79.37% (n = 50), 85.71% (n = 54), 77.78% (n = 49), and 18.87% (n = 10) for Cr, Ni, As, Pb, and Cd, respectively. Also, the skin sensitization risks were obtained for Cr and Ni at 26.980% (n = 17) and 9.52% (n = 6), respectively. The HQ values for 80% of samples were found to be ≥ 1 at least for one parameter. The investigation of fragrance allergens in samples did not show any significant ingredients. As a result, toy makeup products marketed in local stores were found to be predominantly unsafe. Children should be protected from harmful chemicals by regular monitoring and strict measures.
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Affiliation(s)
- Selda Mercan
- Institute of Forensic Sciences and Legal Medicine, Department of Science, Istanbul University- Cerrahpasa, 34500, Buyukcekmece, Istanbul, Turkey.
| | - Mihriban Dilan Kilic
- Institute of Forensic Sciences and Legal Medicine, Department of Science, Istanbul University- Cerrahpasa, 34500, Buyukcekmece, Istanbul, Turkey
| | - Simge Zengin
- Institute of Forensic Sciences and Legal Medicine, Department of Science, Istanbul University- Cerrahpasa, 34500, Buyukcekmece, Istanbul, Turkey
| | - Murat Yayla
- Institute of Forensic Sciences and Legal Medicine, Department of Science, Istanbul University- Cerrahpasa, 34500, Buyukcekmece, Istanbul, Turkey
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Hu Z, Wu X, Du Y, Zou W, Dong H, Song M, Hang T, Lu Y. Health risk assessment for human mercury exposure from Cinnabaris-containing Baizi Yangxin Pills in healthy volunteers Po administration. J Trace Elem Med Biol 2024; 83:127398. [PMID: 38245934 DOI: 10.1016/j.jtemb.2024.127398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/04/2024] [Accepted: 01/15/2024] [Indexed: 01/23/2024]
Abstract
BACKGROUND Cinnabaris (α-HgS), a mineral traditional Chinese material medica, has been used in combination with other herbs manifesting some definite therapeutic effects for thousands of years. But the currently reported mercury poisoning incidents raised the doubts about the safety of Cinnabaris-containing traditional Chinese medicines (TCMs). Baizi Yangxin Pills (BZYXP) is a Cinnabaris-containing TCM widely used in clinical practice. This study evaluated the health risk of mercury exposure from BZYXP in healthy volunteers based on the total mercury and mercury species analysis of blood and urine after single and multiple doses of BZYXP. METHODS Blood pharmacokinetics and urinary excretion studies of mercury were compared between single (9 g, once daily) and multiple doses (9 g, twice daily, continued for 7 days) of BZYXP. The whole blood and urine samples were collected at the specific points or periods after the administration of BZYXP. The total mercury and mercury species in blood and urine samples were determined by cold vapor-atomic fluorescence spectrometry (CV-AFS) and HPLC-CV-AFS, respectively. RESULTS The mercury was excreted slowly and accumulated obviously after continuous exposure of BZYXP. Moreover, the well-known neurotoxin methylmercury (MeHg) was detected in blood samples after 7 days' administration of BZYXP. In the urine samples, only Hg(II) was detected. Therefore, long-term use of BZYXP will cause mercury poisoning due to mercury's high accumulative properties and MeHg formation. CONCLUSION Cinnabaris-containing TCMs such as BZYXP should be restricted to cases in which alternatives are available, and the blood mercury species profile should be monitored during the long-term clinical medication.
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Affiliation(s)
- Zhaoliang Hu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing, China; Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
| | - Xiao Wu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing, China; Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China; School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yi Du
- Department of Pharmacy, First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), Hangzhou, China
| | - Wenyu Zou
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing, China; Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
| | - Haijuan Dong
- The Public Laboratory Platform, China Pharmaceutical University, Nanjing, China
| | - Min Song
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing, China; Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China
| | - Taijun Hang
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing, China; Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China.
| | - Yuting Lu
- Key Laboratory of Drug Quality Control and Pharmacovigilance (China Pharmaceutical University), Ministry of Education, Nanjing, China; Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing, China.
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Hansen G, Shumway SE, Mason RP, Baumann Z. A Comparative Study of Mercury Bioaccumulation in Bivalve Molluscs from a Shallow Estuarine Embayment. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2024; 86:262-273. [PMID: 38531980 DOI: 10.1007/s00244-024-01058-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 02/21/2024] [Indexed: 03/28/2024]
Abstract
In estuarine food webs, bivalve molluscs transfer nutrients and pollutants to higher trophic levels. Mercury (Hg) pollution is ubiquitous, but it is especially elevated in estuaries historically impacted by industrial activities, such as those in the U.S. Northeast. Monomethylmercury (MeHg), the organic form of Hg, is highly bioaccumulative and transferable in the food web resulting in the highest concentrations in the largest and oldest marine predators. Patterns of Hg concentrations in marine bivalve molluscs, however, are poorly understood. In this study, inorganic Hg (iHg), MeHg, and the total Hg (THg) in soft tissues of the northern quahogs (Mercenaria mercenaria), eastern oysters (Crassostrea virginica), and ribbed mussels (Geukensia demissa) from eastern Long Island sound, a temperate estuary of the western North Atlantic Ocean was investigated. In all three species, concentrations of THg remained similar between the four sampling months (May, June, July, and September), and were mostly independent of animal size. In quahogs, MeHg and iHg displayed significant (p < 0.05) positive (iHg in May and June) and negative (MeHg in July and September) changes with shell height. Variability in concentrations of THg, MeHg, and iHg, both inter- and intra-specifically was high and greater in quahogs and oysters (THg: 37, 39%, MeHg: 28, 39%, respectively) than in mussels (THg: 13%, MeHg: 20%). The percentage of THg that was MeHg (%MeHg) was also highly variable in the three species (range: 10-80%), highlighting the importance of measuring MeHg and not only THg in molluscs.
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Affiliation(s)
- Gunnar Hansen
- Department of Marine Sciences, University of Connecticut, 1080 Shennecossett Road, Groton, CT, 06340, USA
| | - Sandra E Shumway
- Department of Marine Sciences, University of Connecticut, 1080 Shennecossett Road, Groton, CT, 06340, USA
| | - Robert P Mason
- Department of Marine Sciences, University of Connecticut, 1080 Shennecossett Road, Groton, CT, 06340, USA
| | - Zofia Baumann
- Department of Marine Sciences, University of Connecticut, 1080 Shennecossett Road, Groton, CT, 06340, USA.
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Zaman SF, Samms-Vaughan M, Saroukhani S, Bressler J, Hessabi M, Grove ML, Pellington SS, Loveland KA, Rahbar MH. Factors associated with blood mercury concentrations and their interactions with three glutathione S-transferase genes (GSTT1, GSTM1, and GSTP1): an exposure assessment study of typically developing Jamaican children. BMC Pediatr 2024; 24:14. [PMID: 38178055 PMCID: PMC10765857 DOI: 10.1186/s12887-023-04452-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 11/30/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND Jamaican soil is abundant in heavy metals including mercury (Hg). Due to availability and ease of access, fish is a traditional dietary component in Jamaica and a significant source of Hg exposure. Mercury is a xenobiotic and known neuro-toxicant that affects children's neurodevelopment. Human glutathione S-transferase (GST) genes, including GSTT1, GSTM1, and GSTP1, affect Hg conjugation and elimination mechanisms. METHODS In this exposure assessment study we used data from 375 typically developing (TD) 2-8-year-old Jamaican children to explore the association between environmental Hg exposure, GST genes, and their interaction effects on blood Hg concentrations (BHgCs). We used multivariable general linear models (GLMs). RESULTS We identified the child's age, consumption of saltwater fish, canned fish (sardine, mackerel), string beans, grain, and starches (pasta, macaroni, noodles) as the environmental factors significantly associated with BHgCs (all P < 0.05). A significant interaction between consumption of canned fish (sardine, mackerel) and GSTP1 in relation to BHgC using either a co-dominant or recessive genetic model (overall interaction P = 0.01 and P < 0.01, respectively) indicated that consumption of canned fish (sardine, mackerel) was significantly associated with higher mean BHgC only among children with the GSTP1 Ile105Val, Ile/Ile [Ratio of mean Hg (95% CI) = 1.59 (1.09, 2.32), P = 0.02] and Ile/Val [Ratio of mean Hg (95% CI) = 1.46 (1.12, 1.91), P = 0.01] genotypes. CONCLUSIONS Since this is the first study from Jamaica to report these findings, replication in other populations is recommended.
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Affiliation(s)
- Sheikh Farzana Zaman
- Department of Epidemiology, Human Genetics, and Environmental Sciences (EHGES), School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Biostatistics/Epidemiology/Research Design (BERD) Component, Center for Clinical and Translational Sciences (CCTS), The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Maureen Samms-Vaughan
- Department of Child & Adolescent Health, The University of the West Indies (UWI), Mona Campus, Kingston 7, Kingston, Jamaica
| | - Sepideh Saroukhani
- Biostatistics/Epidemiology/Research Design (BERD) Component, Center for Clinical and Translational Sciences (CCTS), The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Department of Internal Medicine, Division of Clinical and Translational Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Jan Bressler
- Department of Epidemiology, Human Genetics, and Environmental Sciences (EHGES), School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Human Genetics Center, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Manouchehr Hessabi
- Biostatistics/Epidemiology/Research Design (BERD) Component, Center for Clinical and Translational Sciences (CCTS), The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Megan L Grove
- Department of Epidemiology, Human Genetics, and Environmental Sciences (EHGES), School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Human Genetics Center, School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Sydonnie Shakespeare Pellington
- Department of Child & Adolescent Health, The University of the West Indies (UWI), Mona Campus, Kingston 7, Kingston, Jamaica
| | - Katherine A Loveland
- Louis A Faillace, MD, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX, 77054, USA
| | - Mohammad H Rahbar
- Department of Epidemiology, Human Genetics, and Environmental Sciences (EHGES), School of Public Health, The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.
- Biostatistics/Epidemiology/Research Design (BERD) Component, Center for Clinical and Translational Sciences (CCTS), The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.
- Department of Internal Medicine, Division of Clinical and Translational Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.
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Oguro A, Fujiyama T, Ishihara Y, Kataoka C, Yamamoto M, Eto K, Komohara Y, Imaoka S, Sakuragi T, Tsuji M, Shibata E, Kotake Y, Yamazaki T. Maternal DHA intake in mice increased DHA metabolites in the pup brain and ameliorated MeHg-induced behavioral disorder. J Lipid Res 2023; 64:100458. [PMID: 37838304 PMCID: PMC10656226 DOI: 10.1016/j.jlr.2023.100458] [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: 02/17/2023] [Revised: 10/05/2023] [Accepted: 10/07/2023] [Indexed: 10/16/2023] Open
Abstract
Although pregnant women's fish consumption is beneficial for the brain development of the fetus due to the DHA in fish, seafood also contains methylmercury (MeHg), which adversely affects fetal brain development. Epidemiological studies suggest that high DHA levels in pregnant women's sera may protect the fetal brain from MeHg-induced neurotoxicity, but the underlying mechanism is unknown. Our earlier study revealed that DHA and its metabolite 19,20-dihydroxydocosapentaenoic acid (19,20-DHDP) produced by cytochrome P450s (P450s) and soluble epoxide hydrolase (sEH) can suppress MeHg-induced cytotoxicity in mouse primary neuronal cells. In the present study, DHA supplementation to pregnant mice suppressed MeHg-induced impairments of pups' body weight, grip strength, motor function, and short-term memory. DHA supplementation also suppressed MeHg-induced oxidative stress and the decrease in the number of subplate neurons in the cerebral cortex of the pups. DHA supplementation to dams significantly increased the DHA metabolites 19,20-epoxydocosapentaenoic acid (19,20-EDP) and 19,20-DHDP as well as DHA itself in the fetal and infant brains, although the expression levels of P450s and sEH were low in the fetal brain and liver. DHA metabolites were detected in the mouse breast milk and in human umbilical cord blood, indicating the active transfer of DHA metabolites from dams to pups. These results demonstrate that DHA supplementation increased DHA and its metabolites in the mouse pup brain and alleviated the effects of MeHg on fetal brain development. Pregnant women's intake of fish containing high levels of DHA (or DHA supplementation) may help prevent MeHg-induced neurotoxicity in the fetus.
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Affiliation(s)
- Ami Oguro
- Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
| | - Taichi Fujiyama
- Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yasuhiro Ishihara
- Program of Biomedical Science, Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, Japan
| | | | | | - Komyo Eto
- National Institute for Minamata Disease, Kumamoto, Japan
| | - Yoshihiro Komohara
- Department of Cell Pathology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Susumu Imaoka
- Department of Biomedical Sciences, School of Biological and Environmental Sciences, Kwansei Gakuin University, Hyogo, Japan
| | - Toshihide Sakuragi
- Department of Environmental Health, School of Medicine, University of Occupational and Environmental Health, Fukuoka, Japan; Department of Obstetrics and Gynecology, School of Medicine, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Mayumi Tsuji
- Department of Environmental Health, School of Medicine, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Eiji Shibata
- Department of Obstetrics and Gynecology, Dokkyo Medical University, Tochigi, Japan
| | - Yaichiro Kotake
- Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Takeshi Yamazaki
- Program of Life and Environmental Sciences, Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, Japan
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Coe GL, Krout IN, Munro-Ehrlich M, Beamish CR, Vorojeikina D, Colman DR, Boyd EJ, Walk ST, Rand MD. Assessing the role of the gut microbiome in methylmercury demethylation and elimination in humans and gnotobiotic mice. Arch Toxicol 2023; 97:2399-2418. [PMID: 37392210 PMCID: PMC10913183 DOI: 10.1007/s00204-023-03548-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 06/14/2023] [Indexed: 07/03/2023]
Abstract
The risk of methylmercury (MeHg) toxicity following ingestion of contaminated foodstuffs (e.g., fish) is directly related to the kinetics of MeHg elimination among individuals. Yet, the factors driving the wide range of inter-individual variability in MeHg elimination within a population are poorly understood. Here, we investigated the relationship between MeHg elimination, gut microbiome demethylation activity, and gut microbiome composition using a coordinated human clinical trial and gnotobiotic mouse modeling approach together with metagenomic sequence analysis. We first observed MeHg elimination half-lives (t1/2) ranging from 28 to 90 days across 27 volunteers. Subsequently, we found that ingestion of a prebiotic induced changes in the gut microbiome and mixed effects (increased, decrease, and no effect) on elimination in these same individuals. Nonetheless, elimination rates were found to correlate with MeHg demethylation activity in cultured stool samples. In mice, attempts to remove the microbiome via generation of germ-free (GF) animals or through antibiotic (Abx) treatment both diminished MeHg demethylation to a similar extent. While both conditions substantially slowed elimination, Abx treatment resulted in significantly slower elimination than the GF condition, indicating an additional role for host-derived factors in supporting elimination. Human fecal microbiomes transplanted to GF mice restored elimination rates to that seen in control mice. Metagenomic sequence analysis of human fecal DNA did not identify genes encoding proteins typically involved in demethylation (e.g., merB, organomercury lyase). However, the abundance of several anaerobic taxa, notably Alistipes onderdonkii, were positively correlated with MeHg elimination. Surprisingly, mono-colonization of GF free mice with A. onderdonkii did not restore MeHg elimination to control levels. Collectively, our findings indicate the human gut microbiome uses a non-conventional pathway of demethylation to increase MeHg elimination that relies on yet to be resolved functions encoded by the gut microbes and the hostClinical Trial NCT04060212, prospectively registered 10/1/2019.
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Affiliation(s)
- Genevieve L Coe
- Department of Microbiology and Cell Biology, Montana State University, Bozeman, MT, USA
| | - Ian N Krout
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Mason Munro-Ehrlich
- Department of Microbiology and Cell Biology, Montana State University, Bozeman, MT, USA
| | - Catherine R Beamish
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Daria Vorojeikina
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Daniel R Colman
- Department of Microbiology and Cell Biology, Montana State University, Bozeman, MT, USA
| | - Eric J Boyd
- Department of Microbiology and Cell Biology, Montana State University, Bozeman, MT, USA
| | - Seth T Walk
- Department of Microbiology and Cell Biology, Montana State University, Bozeman, MT, USA
| | - Matthew D Rand
- Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA.
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8
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Okubo H, Nakayama SF. Periconceptional diet quality and its relation to blood heavy metal concentrations among pregnant women: The Japan environment and Children's study. ENVIRONMENTAL RESEARCH 2023; 225:115649. [PMID: 36894116 DOI: 10.1016/j.envres.2023.115649] [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: 01/22/2023] [Revised: 03/01/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Diets contain toxic chemical contaminants as well as essential nutrients, both of which influence the intrauterine environment for foetal growth. However, whether a high-quality diet that is nutritionally healthy also results in lower exposure to chemical contaminants is unknown. OBJECTIVE We examined associations between periconceptional maternal diet quality and circulating concentrations of heavy metals during pregnancy. DESIGN Dietary intake over the year prior to the first trimester of pregnancy was assessed using a validated, self-administered food frequency questionnaire among 81,104 pregnant Japanese women who participated in the Japan Environment and Children's Study. Overall diet quality was determined using the Balanced Diet Score (BDS) based on the Japanese Food Guide Spinning Top, the Healthy Eating Index-2015 (HEI-2015), the Dietary Approaches to Stop Hypertension (DASH) score and the Mediterranean diet score (MDS). We measured whole-blood concentrations of mercury (Hg), lead (Pb) and cadmium (Cd) during the second or third trimester of pregnancy. RESULTS After controlling for confounders, all diet quality scores were positively associated with blood Hg concentrations. By contrast, higher BDS, HEI-2015 and DASH scores were associated with lower concentrations of Pb and Cd. Although the MDS was positively associated with concentrations of Pb and Cd, when dairy products were classified as a beneficial (rather than detrimental) food component, these associations were attenuated. CONCLUSION A high-quality diet may reduce exposure to Pb and Cd but not Hg. Further studies are required to determine the optimal balance between mercury exposure risk and nutritional benefits of high-quality diets prior to pregnancy.
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Affiliation(s)
- Hitomi Okubo
- Japan Environment and Children's Study Programme Office, National Institute for Environmental Studies, Ibaraki, Japan; Research Fellow of Japan Society for the Promotion of Science, Tokyo, Japan.
| | - Shoji F Nakayama
- Japan Environment and Children's Study Programme Office, National Institute for Environmental Studies, Ibaraki, Japan.
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9
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Rodrigues EL, Figueiredo PS, Marcelino G, de Cássia Avellaneda Guimarães R, Pott A, Santana LF, Hiane PA, do Nascimento VA, Bogo D, de Cássia Freitas K. Maternal Intake of Polyunsaturated Fatty Acids in Autism Spectrum Etiology and Its Relation to the Gut Microbiota: What Do We Know? Nutrients 2023; 15:nu15071551. [PMID: 37049390 PMCID: PMC10097097 DOI: 10.3390/nu15071551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/17/2023] [Accepted: 02/20/2023] [Indexed: 04/14/2023] Open
Abstract
Maternal food habits and gut microbiota composition have potential effects on fetal neurodevelopment, impacting Autism Spectrum Disorder (ASD). Our research aims to outline the relationship that ingestion of polyunsaturated fatty acids (PUFAs) and the composition of maternal gut microbiota have with the possible development of ASD in offspring. We suggest that genetic factors could be related to the different conversions between unsaturated fatty acids according to sex and, mainly, the impact of the pregnancy diet on the higher or lower risk of neurological impairments. The proportion of the phyla Firmicutes/Bacteroidetes is high with an increased consumption of linoleic acid (LA, n-6 PUFA), which is associated with maternal intestinal dysbiosis and consequently starts the inflammatory process, harming myelinization. In contrast, the consumption of α-linolenic acid (ALA, n-3 PUFA) tends to re-establish the balance of the maternal microbiota with anti-inflammatory action. Moreover, human observational studies showed a strong correlation between the consumption of n-3 PUFA, mainly above 340 g of fish per week, with beneficial effects on infant neurodevelopment. Therefore, we suggest that the proper intake of foods rich in n-3 PUFAs and their supplementation during pregnancy until lactation has an impact on reducing the development of ASD. Controlled studies with n-3 PUFA supplementation are still necessary to verify the ideal dose and the best form of administration.
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Affiliation(s)
- Elisana Lima Rodrigues
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul-UFMS, Campo Grande 79079-900, MS, Brazil
| | - Priscila Silva Figueiredo
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul-UFMS, Campo Grande 79079-900, MS, Brazil
| | - Gabriela Marcelino
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul-UFMS, Campo Grande 79079-900, MS, Brazil
| | - Rita de Cássia Avellaneda Guimarães
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul-UFMS, Campo Grande 79079-900, MS, Brazil
| | - Arnildo Pott
- Institute of Biosciences, Federal University of Mato Grosso do Sul-UFMS, Campo Grande 79079-900, MS, Brazil
| | - Lidiani Figueiredo Santana
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul-UFMS, Campo Grande 79079-900, MS, Brazil
| | - Priscila Aiko Hiane
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul-UFMS, Campo Grande 79079-900, MS, Brazil
| | - Valter Aragão do Nascimento
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul-UFMS, Campo Grande 79079-900, MS, Brazil
| | - Danielle Bogo
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul-UFMS, Campo Grande 79079-900, MS, Brazil
| | - Karine de Cássia Freitas
- Graduate Program in Health and Development in the Central-West Region of Brazil, Federal University of Mato Grosso do Sul-UFMS, Campo Grande 79079-900, MS, Brazil
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10
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Go S, Masuda H, Tsuru M, Inden M, Hozumi I, Kurita H. Exposure to a low concentration of methylmercury in neural differentiation downregulates NR4A1 expression with altered epigenetic modifications and inhibits neuronal spike activity in vitro. Toxicol Lett 2023; 374:68-76. [PMID: 36565944 DOI: 10.1016/j.toxlet.2022.12.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 10/31/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
Methylmercury (MeHg) is a well-known developmental neurotoxin. Our previous research showed that the inhibition of neurite extension by exposure to a low level of MeHg (1 nM) was attributed to the decrease of acetylation of histone H3 and the increase of DNA methylation. However, the target molecules responsible for the neurological dysfunctions caused by MeHg exposure have not been identified. This study focused on a nuclear receptor subfamily 4 group A member 1 (NR4A1), which is reported to be related to synaptic plasticity and neurite extension. LUHMES cells, which are derived from human fetal brain, were treated with 0.1 and 1 nM MeHg beginning at two days of differentiation and continued for 6 consecutive days. The present study showed that exposure to a 1 nM MeHg during neural differentiation inhibited neuronal spike activity and neurite extension. Furthermore, MeHg exposure increased DNA methylation, and altered histone modifications for transcriptional repression in the NR4A1 promoter region to decrease the levels of NR4A1 expression. In addition, MeHg exposure inhibited the mobilization of cAMP response element-binding protein (CREB) and CREB binding protein (CBP) in the NR4A1 promoter region. These results suggest that MeHg inhibits the recruitment of the CREB-CBP complex to the NR4A1 promoter region and impairs neuronal functions associated with NR4A1 repression via a decrease in acetylation of histone H3 lysine 14 levels. Conclusively, this study demonstrated that MeHg exposure during neuronal differentiation could induce neurological dysfunctions even at a low concentration in vitro. These dysfunctions could be associated with the transcriptional repression of NR4A1 by the dissociation of CREB and CBP from the NR4A1 promoter region due to the alterations of epigenetic modifications.
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Affiliation(s)
- Suzuna Go
- Laboratory of Medical Therapeutics and Molecular Therapeutics, Department Biomedical Pharmaceutics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu city, Gifu, 501-1196, Japan
| | - Haruka Masuda
- Laboratory of Medical Therapeutics and Molecular Therapeutics, Department Biomedical Pharmaceutics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu city, Gifu, 501-1196, Japan
| | - Mizuki Tsuru
- Laboratory of Medical Therapeutics and Molecular Therapeutics, Department Biomedical Pharmaceutics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu city, Gifu, 501-1196, Japan
| | - Masatoshi Inden
- Laboratory of Medical Therapeutics and Molecular Therapeutics, Department Biomedical Pharmaceutics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu city, Gifu, 501-1196, Japan
| | - Isao Hozumi
- Laboratory of Medical Therapeutics and Molecular Therapeutics, Department Biomedical Pharmaceutics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu city, Gifu, 501-1196, Japan.
| | - Hisaka Kurita
- Laboratory of Medical Therapeutics and Molecular Therapeutics, Department Biomedical Pharmaceutics, Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu city, Gifu, 501-1196, Japan.
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11
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de Lauzon-Guillain B, Marques C, Kadawathagedara M, Bernard JY, Tafflet M, Lioret S, Charles MA. Maternal diet during pregnancy and child neurodevelopment up to age 3.5 years: the nationwide Étude Longitudinale Française depuis l'Enfance (ELFE) birth cohort. Am J Clin Nutr 2022; 116:1101-1111. [PMID: 35918250 DOI: 10.1093/ajcn/nqac206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 07/26/2022] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Dietary guidelines available to pregnant women are made to improve maternal health and fetal development. But their adequacy to sustain offspring neurodevelopment has remained understudied. OBJECTIVES We assessed the association between compliance with nutritional guidelines during pregnancy and neurodevelopment in preschool children. METHODS The analyses were based on data for 6780 to 11,278 children from the Étude Longitudinale Française depuis l'Enfance (ELFE) study, a nationwide birth cohort. Maternal diet during the last 3 mo of pregnancy was evaluated at delivery by using a validated 125-item FFQ. From this FFQ, food group consumption, a diet quality score (adapted National Health and Nutrition Program Guideline Score), and a nutrient intake score (Probability of Adequate Nutrient intake based Diet quality index) were calculated and dietary patterns were derived by principal component analysis. Child neurodevelopment was reported by parents at 1 and 3.5 y with the Child Development Inventory (CDI-1, CDI-3.5) and at 2 y with the MacArthur-Bates Communicative Development Inventories (MB-2), and assessed by a trained investigator at 3.5 y with the Picture Similarities test (British Ability Scales, PS-3.5). Associations between maternal diet and child neurodevelopment were assessed by multivariable linear regression models on standardized variables. RESULTS Higher nutrient intake score was associated with higher neurodevelopmental scores from 1 to 3.5 y (β = 0.04; 95% CI: 0.02, 0.06 for CDI-1; β = 0.03; 95% CI: 0.01, 0.05 for MB-2; and β = 0.03; 95% CI: 0.01, 0.05 for CDI-3.5). Higher fruit and vegetables or fish intake and lower pork-meat products intake were related to higher CDI-3.5 scores (β = 0.03; 95% CI: 0.01, 0.05 for fruit and vegetables; β = 0.03; 95% CI: 0.01, 0.05 for fish; and β = -0.02; 95% CI: -0.04, 0.00 for pork-meat products). A higher score on the processed food pattern was associated with poorer neurodevelopmental score at 1 y (β = -0.05; 95% CI: -0.06, -0.03). CONCLUSIONS Higher diet quality during pregnancy was associated with higher parent-reported neurodevelopmental scores in early childhood. The negative association of pork-meat products consumption with early neurodevelopmental scores needs to be further confirmed.
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Affiliation(s)
| | - Chloé Marques
- Université Paris Cité, CRESS, Inserm, INRAE, Paris, France
| | | | - Jonathan Y Bernard
- Université Paris Cité, CRESS, Inserm, INRAE, Paris, France.,Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Muriel Tafflet
- Université Paris Cité, CRESS, Inserm, INRAE, Paris, France
| | | | - Marie Aline Charles
- Université Paris Cité, CRESS, Inserm, INRAE, Paris, France.,Unité mixte Inserm-Ined-EFS ELFE, Ined, Aubervilliers, France
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12
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Plachy M, Bartha A, Budai P, Palotás P, Lehel J. Toxic elements in Sardina pilchardus and food toxicological significance. FOOD ADDITIVES & CONTAMINANTS. PART B, SURVEILLANCE 2022; 15:212-220. [PMID: 35640935 DOI: 10.1080/19393210.2022.2081733] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
Cd, Hg, and Pb concentrations were investigated in Sardina pilchardus fish. Samples originated from the Atlantic Northeast fishing area 27 and were analysed by inductively coupled plasma optical emission spectroscopy. The aim of the study was to estimate the health impact of consumption, based on the concentrations and calculated exposure for each element. Based on the average total arsenic concentration of 3.26 ± 0.39 mg/kg in the samples, the estimated inorganic arsenic content and calculated PTWI suggested that the samples do not pose a health risk for consumers. Cadmium content of the samples was also not considered hazardous, as both the measured concentrations and PTMI values were below the specified limits. Lead concentration exceeded the maximum limit in 73% of the samples, while calculated average weekly intake was below the recommended level. The measured mercury concentrations exceeded the maximum limit in only 5% of the samples.
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Affiliation(s)
- Melinda Plachy
- Department of Food Hygiene, University of Veterinary Medicine, Budapest, Hungary
| | - András Bartha
- Department of Animal Hygiene, Herd Health and Mobile Clinic, University of Veterinary Medicine, Budapest, Hungary
| | - Péter Budai
- Institute of Plant Protection, Georgikon Campus, Hungarian University of Agriculture and Life Sciences, Keszthely, Hungary
| | | | - József Lehel
- Department of Food Hygiene, University of Veterinary Medicine, Budapest, Hungary
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13
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Maternal fish and shellfish consumption and preterm birth: a retrospective study in urban China. Br J Nutr 2022; 128:684-692. [PMID: 34558400 DOI: 10.1017/s0007114521003858] [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: 12/24/2022]
Abstract
Preterm birth is the leading cause of perinatal mortality and morbidity. Some prospective cohort studies suggested that fish and shellfish consumption may affect the incidence of preterm birth. However, conflicting evidence exists on the relationship between fish and shellfish consumption and preterm birth. A total of 10 179 women from Gansu province were interviewed after delivery to collect information on their past intake of fish and shellfish using FFQ. Logistic regression models were used to estimate OR and 95 % CI to examine the association between fish and shellfish consumption and preterm birth and its clinical subtypes. Fish and shellfish consumption was associated with reduced risk of preterm birth (OR = 0·65, 95 % CI 0·56, 0·77). Increasing frequency of fish and shellfish consumption, compared with no fish and shellfish consumption, was associated with decreasing odds of preterm birth. Besides, increasing weekly total amount of fish and shellfish consumption, compared with no fish and shellfish consumption, was also associated with decreasing odds of preterm birth. Significant trend effect was also seen between fish and shellfish consumption and very preterm birth (Pfor trend = 0·001) and spontaneous preterm birth (Pfor trend = 0·003). Interaction was observed between total fish and shellfish consumption with maternal age (Pfor interaction = 0·041) and pre-pregnancy BMI underweight (Pfor interaction = 0·012). Our findings showed that maternal fish and shellfish consumption was associated with lower incidence of preterm birth.We recommend for the national guideline of ≥350 g/week of fish and shellfish consumption among pregnant women.
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14
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Attia SM, Ahmad SF, Nadeem A, Attia M, Ansari MA, Al-Hamamah MA, Hussein MH, Alameen AA, Alasmari AF, Bakheet SA. Multiple exposure to methylmercury aggravates DNA damage in the BTBR T + Itpr3 tf/J autistic mouse model: the role of DNA repair efficiency. Toxicology 2022; 477:153277. [PMID: 35914580 DOI: 10.1016/j.tox.2022.153277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/21/2022] [Accepted: 07/28/2022] [Indexed: 11/16/2022]
Abstract
Environmental and genetic factors have been recognized to play major roles in the pathogenesis of autism. Here we examined the BTBR T+Itpr3tf/J (BTBR) mice's susceptibility, an autistic model, to the genotoxic effects and DNA repair dysregulation of methylmercury. Micronuclei formation and oxidative DNA damage were analyzed using the micronucleus/fluorescence in situ hybridization test and modified comet assay, respectively. The results showed higher centromeric-positive micronuclei and oxidative DNA damage in BTBR mice exposed to methylmercury than the unexposed mice, which indicates that mutagenesis aggravated in BTBR mice after methylmercury exposure. Lipid peroxides in BTBR mice were significantly elevated, with a decrease in reduced/oxidized glutathione ratio after methylmercury exposure, indicating an augmenting oxidant-antioxidant imbalance. The expression of several genes involved in DNA repair was markedly altered in BTBR mice after methylmercury exposure as evaluated via PCR array and RT-PCR analyses. Declining of the antioxidant defense and dysregulation in DNA repair process after methylmercury exposure may explain the aggravated genotoxic susceptibility of BTBR mice. Thus, autistic individuals exposed to methylmercury must be under regular medical follow-up through standard timetabled medical laboratory inquiry to allow for early recognition of any mutagenic changes. Additionally, strategies that elevate cellular antioxidants/DNA repair efficiency may counteract methylmercury-induced genotoxicity.
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Affiliation(s)
- S M Attia
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
| | - S F Ahmad
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - A Nadeem
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Msm Attia
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - M A Ansari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - M A Al-Hamamah
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - M H Hussein
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - A A Alameen
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - A F Alasmari
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - S A Bakheet
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
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15
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Yang K, Chen C, Yan Q, Shen X, Jiang L, Ma R, Lu L, Zhu J, Tian Y, Cai W, D'Alton ME, Zhang J, Kahe K. Combined association of early exposure to long-chain n-3 polyunsaturated fatty acids, mercury and selenium with cognitive performance in 1-year-old infants. ENVIRONMENTAL RESEARCH 2022; 207:112186. [PMID: 34627802 DOI: 10.1016/j.envres.2021.112186] [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: 07/20/2021] [Revised: 09/18/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Previous studies on long-chain n-3 polyunsaturated fatty acids (LCn3PUFAs) and infant neurodevelopment did not consider effect modifications of mercury (Hg) and selenium (Se). OBJECTIVES To examine the joint association of prenatal LCn3PUFAs, Hg and Se with infant cognitive performance, and to explore whether DNA methylation may explain this potential association. METHODS A total of 484 newborns were enrolled from the Shanghai Birth Cohort with available data on cord blood LCn3PUFA, nail Hg and Se during 2015-2016. Cord blood LCn3PUFA concentrations were assessed by gas chromatography, and nail Hg and Se concentrations were measured using clippings collected within 6 months of birth by inductively coupled plasma mass spectrometry. Five aspects of infant neurodevelopment (communication, gross motor, fine motor, problem-solving, and personal-social skills) were assessed using the Age and Stage Questionnaire (ASQ) at ages 6 and 12 months. Multivariable-adjusted generalized estimating equations models were performed to examine the associations between cord blood LCn3PUFA concentrations and ASQ test scores, and these associations were stratified by nail Hg and Se levels. Epigenome-wide DNA methylation in cord blood was compared in a random subgroup consisting of 19 infants from the highest and 21 from the lowest decile of LCn3PUFA concentrations. RESULTS LCn3PUFAs were not significantly associated with any ASQ test scores. However, in the subgroup with lower Hg (<median 0.13 ppm) and higher Se (≥median 0.87 ppm) levels, infants with higher LCn3PUFA concentrations had higher ASQ scores indicating better performance in gross motor skills [quartile 4 vs. 1: mean difference = 7.78; 95% confidence interval=(3.47, 12.09); Ptrend<0.01; Pinteraction = 0.03]. Additionally, twenty CpG sites were differentially methylated when comparing high to low LCn3PUFA groups. CONCLUSION The association of prenatal LCn3PUFA concentrations with infant neurodevelopment, particularly gross motor skills, may be observed among infants with high Se and low Hg levels.
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Affiliation(s)
- Kefeng Yang
- Department of Nutrition, Xin Hua Hospital Affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Cheng Chen
- Department of Obstetrics and Gynecology, Vagelos College of Physicians and Surgeons, Columbia University, New York, USA; Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, USA
| | - Qi Yan
- Department of Obstetrics and Gynecology, Vagelos College of Physicians and Surgeons, Columbia University, New York, USA
| | - Xiuhua Shen
- Department of Nutrition, Xin Hua Hospital Affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Linlei Jiang
- Instrumental Analysis Platform, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Rui Ma
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xin Hua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Liping Lu
- Department of Obstetrics and Gynecology, Vagelos College of Physicians and Surgeons, Columbia University, New York, USA; Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, USA
| | - Jie Zhu
- Nutrition and Foods Program, School of Family and Consumer Sciences, Texas State University, San Marcos, TX, USA
| | - Ying Tian
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xin Hua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Wei Cai
- Department of Nutrition, Xin Hua Hospital Affiliated to School of Medicine, Shanghai Jiao Tong University, Shanghai, China; Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition, Shanghai, China
| | - Mary E D'Alton
- Department of Obstetrics and Gynecology, Vagelos College of Physicians and Surgeons, Columbia University, New York, USA
| | - Jun Zhang
- MOE-Shanghai Key Laboratory of Children's Environmental Health, Xin Hua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ka Kahe
- Department of Obstetrics and Gynecology, Vagelos College of Physicians and Surgeons, Columbia University, New York, USA; Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, USA.
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16
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Wiech M, Djønne C, Kolding J, Kjellevold M, Ferter K. Targeted risk assessment of mercury exposure of recreational fishers: Are nephrops fishers in Norway at risk? ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:50316-50328. [PMID: 33956315 PMCID: PMC8445859 DOI: 10.1007/s11356-021-14093-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 04/20/2021] [Indexed: 06/12/2023]
Abstract
Recreational fishers often consume their catch, which may expose them to environmental contaminants. However, targeted risk assessment for exceeding the tolerable weekly intake (TWI) of a specific contaminant is often lacking, as specific data on the extent of fishing, consumption rates, and contamination of the caught seafood is needed. This study examined recreational fishing for nephrops (Nephrops norvegicus) at several different locations in Western Norway to identify important risk factors. The combination of a field survey to examine actual catches, interviews of recreational fishers about their seafood eating habits, and the analysis of total mercury (Hg, as a proxy for methylmercury (MeHg)) in recreationally captured nephrops allowed to conduct a targeted risk assessment. Recreational fishers consumed on average seven nephrops per meal, and 73% of the fishers ate nephrops once a month or more. The average Hg concentrations in nephrops were below the legal maximum level (100 ± 50 μg/kg wet weight (mean ± SD)). Hg concentrations in female nephrops were significantly higher than in males at the same size, and differed significantly between locations. The recreational fishers in this study were not at risk of exceeding the TWI for MeHg from consuming nephrops only; however, there is a general risk of exceeding TWI for MeHg as 70% of the fishers reported a frequent consumption of fish for dinner. Targeted risk assessments on recreational fishers may reveal particularly vulnerable populations where national dietary surveys may miss the highest seafood consumers.
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Affiliation(s)
- Martin Wiech
- Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817, Bergen, Norway.
| | - Christine Djønne
- Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817, Bergen, Norway
| | - Jeppe Kolding
- University of Bergen, P.O. Box 7800, NO-5020, Bergen, Norway
| | - Marian Kjellevold
- Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817, Bergen, Norway
| | - Keno Ferter
- Institute of Marine Research, P.O. Box 1870, Nordnes, NO-5817, Bergen, Norway
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17
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Vecchione R, Vigna C, Whitman C, Kauffman EM, Braun JM, Chen A, Xu Y, Hamra GB, Lanphear BP, Yolton K, Croen LA, Fallin MD, Irva Hertz-Picciotto, Newschaffer CJ, Lyall K. The Association Between Maternal Prenatal Fish Intake and Child Autism-Related Traits in the EARLI and HOME Studies. J Autism Dev Disord 2021; 51:487-500. [PMID: 32519188 PMCID: PMC7725860 DOI: 10.1007/s10803-020-04546-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We examined the association between prenatal fish intake and child autism-related traits according to Social Responsiveness Scale (SRS) and cognitive development scores in two US prospective pregnancy cohorts. In adjusted linear regression analyses, higher maternal fish intake in the second half of pregnancy was associated with increased child autism traits (higher raw SRS scores; ß = 5.60, 95%CI 1.76, 12.97). Differences by fish type were suggested; shellfish and large fish species were associated with increases, and salmon with decreases, in child SRS scores. Clear patterns with cognitive scores in the two cohorts were not observed. Future work should further evaluate potential critical windows of prenatal fish intake, and the role of different fish types in association with child autism-related outcomes.
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Affiliation(s)
- Rachel Vecchione
- Dornsife School of Public Health, Department of Epidemiology and Biostatistics, Drexel University, Philadelphia, PA, USA
| | - Chelsea Vigna
- Dornsife School of Public Health, Department of Epidemiology and Biostatistics, Drexel University, Philadelphia, PA, USA
| | - Casey Whitman
- Dornsife School of Public Health, Department of Epidemiology and Biostatistics, Drexel University, Philadelphia, PA, USA
| | - Elizabeth M Kauffman
- AJ Drexel Autism Institute, Drexel University, 3020 Market Street, Suite 560, Philadelphia, PA, 19104-3734, USA
| | - Joseph M Braun
- School of Public Health, Department of Epidemiology, Brown University, Providence, RI, USA
| | - Aimin Chen
- Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Yingying Xu
- Department of Pediatrics, Division of General and Community Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Ghassan B Hamra
- Department of Epidemiology, Johns Hopkins, Baltimore, MD, USA
| | - Bruce P Lanphear
- Child and Family Research Institute, BC Children's Hospital, British Columbia, Canada.,Faculty of Health Sciences, Simon Fraser University, Burnaby, Canada
| | - Kimberly Yolton
- Department of Pediatrics, Division of General and Community Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Lisa A Croen
- Division of Research, Kaiser Permanente Northern California, Oakland, CA, USA
| | | | | | - Craig J Newschaffer
- AJ Drexel Autism Institute, Drexel University, 3020 Market Street, Suite 560, Philadelphia, PA, 19104-3734, USA.,College of Health and Human Development, Pennsylvania State University, University Park, PA, USA
| | - Kristen Lyall
- Dornsife School of Public Health, Department of Epidemiology and Biostatistics, Drexel University, Philadelphia, PA, USA. .,AJ Drexel Autism Institute, Drexel University, 3020 Market Street, Suite 560, Philadelphia, PA, 19104-3734, USA.
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18
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Lyall K, Windham GC, Snyder NW, Kuskovsky R, Xu P, Bostwick A, Robinson L, Newschaffer CJ. Association Between Midpregnancy Polyunsaturated Fatty Acid Levels and Offspring Autism Spectrum Disorder in a California Population-Based Case-Control Study. Am J Epidemiol 2021; 190:265-276. [PMID: 33524118 DOI: 10.1093/aje/kwaa171] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 08/11/2020] [Accepted: 08/12/2020] [Indexed: 12/16/2022] Open
Abstract
Polyunsaturated fatty acids (PUFAs) are critical for brain development and have been linked with neurodevelopmental outcomes. We conducted a population-based case-control study in California to examine the association between PUFAs measured in midpregnancy serum samples and autism spectrum disorder (ASD) in offspring. ASD cases (n = 499) were identified through the California Department of Developmental Services and matched to live-birth population controls (n = 502) on birth month, year (2010 or 2011), and sex. Logistic regression models were used to examine crude and adjusted associations. In secondary analyses, we examined ASD with and without co-occurring intellectual disability (ID; n = 67 and n = 432, respectively) and effect modification by sex and ethnicity. No clear patterns emerged, though there was a modest inverse association with the top quartile of linoleic acid level (highest quartile vs. lowest: adjusted odds ratio = 0.74, 95% confidence interval: 0.49, 1.11; P for trend = 0.10). Lower levels of total and ω-3 PUFAs were associated with ASD with ID (lowest decile of total PUFAs vs. deciles 4-7: adjusted odds ratio = 2.78, 95% confidence interval: 1.13, 6.82) but not ASD without ID. We did not observe evidence of effect modification by the factors examined. These findings do not suggest a strong association between midpregnancy PUFA levels and ASD. In further work, researchers should consider associations with ASD with ID and in other time windows.
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Rand MD, Conrad K, Marvin E, Harvey K, Henderson D, Tawil R, Sobolewski M, Cory-Slechta DA. Developmental exposure to methylmercury and resultant muscle mercury accumulation and adult motor deficits in mice. Neurotoxicology 2020; 81:1-10. [PMID: 32735808 PMCID: PMC7708410 DOI: 10.1016/j.neuro.2020.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/06/2020] [Accepted: 07/17/2020] [Indexed: 11/20/2022]
Abstract
Developmental methylmercury (MeHg) exposure can have lasting consequences on neural development and motor function across the lifespan. Recent evidence for MeHg targeting of myogenic pathways has drawn attention to the possibility that developing skeletal muscle plays a role in the motor deficits stemming from early life MeHg exposure. In this study we examined a potential role for muscle in influencing MeHg developmental toxicity in offspring of female mice exposed to MeHg via drinking water. Dams had access to 0, 0.5 or 5.0 ppm MeHg chloride in drinking water from two weeks prior to mating through weaning. Blood, brain and muscle tissue was harvested from dams at weaning and pups at postnatal days (PND) 6, 21 and 60 for analysis of total Hg. Muscle tissue sections were examined with histological stains. Behavioral testing of offspring was conducted at PND 60 and included locomotor activity, inverted screen, grip strength and rotarod tests to assess motor function. Total Hg (tHg) levels in dam muscles at weaning were 1.7-3-fold higher than Hg levels in blood or brain. In PND6 male and female pups, muscle and brain tHg levels were 2 to 4-fold higher than blood tHg. Brain tHg levels decreased more rapidly than muscle tHg levels between PND 6 and 21. Premised on modeling of growth dilution, brain tissue demonstrated an elimination of tHg while muscle tissue exhibited a net uptake of tHg between PND 6 and 21. Despite overall elevated Hg levels in developing muscle, no gross morphological or cytological phenotypes were observed in muscle at PND 60. At the higher MeHg dose, grip strength was reduced in both females and males at PND 60, whereas only male specific deficits were observed in locomotor activity and inverted screen tests with marginally significant deficits on rotarod. These findings highlight a potential role for developing skeletal muscle in mediating the neuromuscular insult of early life MeHg exposure.
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Affiliation(s)
| | | | - Elena Marvin
- Department of Environmental Medicine, United States
| | | | - Don Henderson
- Department of Neurology, University of Rochester School of Medicine and Dentistry, Rochester, NY, United States
| | - Rabi Tawil
- Department of Neurology, University of Rochester School of Medicine and Dentistry, Rochester, NY, United States
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20
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Ye X, Fisher NS. Minor effects of dietary methylmercury on growth and reproduction of the sheepshead minnow Cyprinodon variegatus and toxicity to their offspring. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 266:115226. [PMID: 32698054 DOI: 10.1016/j.envpol.2020.115226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 06/30/2020] [Accepted: 07/09/2020] [Indexed: 06/11/2023]
Abstract
Methylmercury (MeHg) is a neurotoxic compound that is found in virtually all fish and biomagnifies in aquatic food webs. Although MeHg concentrations in marine and estuarine fish are often elevated, the impacts of MeHg on marine and estuarine fish have largely been understudied. To evaluate the impact of dietary MeHg on marine fish reproduction and effects on their offspring, female juvenile sheepshead minnows (Cyprinodon variegatus) at three months of age were experimentally exposed to MeHg-contaminated diets for two months and then paired with Hg-free males for spawning. Egg production, hatching success of embryos, time to hatching, survival of larvae, growth of larvae and swimming behavior of larvae were determined. Selenium (Se) was also measured and Se/Hg molar ratios were calculated to assess whether Se reduced MeHg toxicity. MeHg had no significant impact on fish reproduction or on survival and growth of larvae. Larvae produced by MeHg-exposed mothers had concentrations of Hg about 1 ppm (dry wt), or about 12% of that in the muscle of their mothers and consistently displayed 6-15% increased swimming speed relative to controls; the ecological significance of this moderate effect on swimming speed requires further study. The Se/Hg molar ratios in these fish, which were >1 in controls (adults and larvae) and MeHg-exposed larvae but <1 in Hg-exposed adults, did not correlate with MeHg effects. The sheepshead minnow, at a low trophic level, appears to have a high tolerance of MeHg; however, it can pass MeHg to higher trophic levels in marine ecosystems where upper level predators have MeHg concentrations sometimes exceeding US FDA safety limits of 1 ppm wet wt.
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Affiliation(s)
- Xiayan Ye
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY, 11794-5000, USA.
| | - Nicholas S Fisher
- School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY, 11794-5000, USA.
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21
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Al-Saleh I, Moncari L, Jomaa A, Elkhatib R, Al-Rouqi R, Eltabache C, Al-Rajudi T, Alnuwaysir H, Nester M, Aldhalaan H. Effects of early and recent mercury and lead exposure on the neurodevelopment of children with elevated mercury and/or developmental delays during lactation: A follow-up study. Int J Hyg Environ Health 2020; 230:113629. [PMID: 32956901 DOI: 10.1016/j.ijheh.2020.113629] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 09/09/2020] [Accepted: 09/10/2020] [Indexed: 02/07/2023]
Abstract
This follow-up study of 82 children investigated the potential impact of early and recent exposure to mercury and lead on their neurodevelopmental performance at 5-8 years of age (2017-2018). Early exposure of these children to mercury, methylmercury, and lead was assessed during lactation at 3-12 months old, as well as their mother's exposure using measurements from a cross-sectional study (2011-2013). Only infants who failed to pass the neurodevelopment screening tools and/or had elevated mercury were included in this study. Urine and hair were sampled during the follow-up study to assess the children's recent exposure to mercury, methylmercury, and lead. Their cognitive performance and visual-motor integration were also measured using the Test of Non-Verbal Intelligence (TONI) and the Beery-Visual-Motor Integration (Beery VMI), respectively. The association between alterations in urinary porphyrins excretion and exposure to metals was analyzed and their influence on the children's neurodevelopment was explored. Linear regression models revealed a significant negative association between the infants' mercury exposure during lactation and the TONI Quotient (β = -0.298, 95%CI = -4.677, -0.414) and Beery VMI Age Equivalent scores at age 5-8 (β = -0.437, 95%CI = -6.383, -1.844). The mothers' blood methylmercury was inversely and significantly associated with their children's TONI Quotient (β = -0.231, 95%CI = -8.184, -0.331). In contrast, the children's Beery VMI Age Equivalent scores were positively and significantly associated with the hair methylmercury of the mothers (β = 0.214, 95%CI = 0.088, 3.899) and their infants (β = 0.256, 95%CI = 0.396, 4.488). These relationships suggest the presence of negative confounding that we did not take into account. Unlike mercury, there was some evidence that lead in breast milk had an inverse relationship with the children's visual-motor coordination skills. Our study did not show a clear association between children's recent exposure to metals and neurodevelopment. However, a significant inverse association was observed between the TONI Quotient and the interaction of hair methylmercury × ∑porphyrins (ß = -0.224, 95%CI = -0.86, -0.049), implying that porphyrins are a sensitive measure of low body-mercury burden. Although lead induced higher ∑porphyrins excretion in urine (β = 0.347, 95%CI = 0.107, 0.525), their interaction did not influence children's neurodevelopmental scores. The interactions between metals and porphyrins might provide insights into their potential contributory role in the pathogenesis associated with neurological disorders or other diseases. Despite the small sample size of the present study, its findings about the association between toxic metal exposure and the high risk of poor neurodevelopmental performance are worrying, particularly at an early age, and additional research is needed using larger sample sizes.
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Affiliation(s)
| | | | - Ahmed Jomaa
- Center for Autism Research, King Faisal Specialist Hospital and Research Centre, P.O. Box: 3354, Riyadh, 11211, Saudi Arabia
| | | | | | | | | | | | | | - Hesham Aldhalaan
- Center for Autism Research, King Faisal Specialist Hospital and Research Centre, P.O. Box: 3354, Riyadh, 11211, Saudi Arabia
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22
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Næss S, Kjellevold M, Dahl L, Nerhus I, Midtbø LK, Bank MS, Rasinger JD, Markhus MW. Effects of seafood consumption on mercury exposure in Norwegian pregnant women: A randomized controlled trial. ENVIRONMENT INTERNATIONAL 2020; 141:105759. [PMID: 32388274 DOI: 10.1016/j.envint.2020.105759] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 04/03/2020] [Accepted: 04/21/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Seafood provides nutrients that are important for optimal development of the unborn child. However, seafood is also a source of contaminants including mercury (Hg) and methylmercury (MeHg) that may have adverse effects on neurodevelopment of the fetus. Humans are predominantly exposed to MeHg through seafood consumption, however, levels of MeHg vary considerably between species. OBJECTIVES Investigate, in a randomized controlled trial (RCT) during pregnancy, if an increased intake of Atlantic cod (Gadus morhua), a fish species with relatively low levels of MeHg contamination, influences total hair Hg (THHg) concentrations in humans. METHODS Pregnant women (n = 137) were enrolled in the RCT "Mommy's Food" (2016-2017), which was designed to increase iodine status. Participants were randomly assigned to intervention (400 g of cod fillets per week) or control (continued habitual diet) groups for 16 weeks (gestational week 20-36). THHg concentrations were measured at baseline and post-intervention using thermal decomposition, amalgamation, and atomic absorption spectrophotometry (US EPA method 7473). The trial is registered in ClinicalTrials.gov, NCT02610959. RESULTS Post-intervention, the intervention group had median (inter-quartile range) THHg concentrations of 554 (392-805) µg/kg, and the control group 485 (341-740) µg/kg (p = 0.186). When adjusting for baseline THHg concentrations, there was a significant difference between the groups in those participants with baseline THHg concentrations below 534 µg/kg. Post-intervention, 8% of the study population exceeded the US EPA reference dose in hair (1,000 µg/kg) (intervention group: n = 6, control group: n = 4). CONCLUSION THHg concentrations were generally low in both study groups of pregnant women, despite the relatively high seafood intake. While the intervention with 400 g of cod per week slightly increased THHg concentrations, it did not lead to an increase in number of subjects exceeding the US EPA reference dose; a dose level at which no adverse effects are expected to occur over a period of lifetime exposure.
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Affiliation(s)
- Synnøve Næss
- Institute of Marine Research (IMR), 5817 Bergen, Norway.
| | | | - Lisbeth Dahl
- Institute of Marine Research (IMR), 5817 Bergen, Norway
| | - Ive Nerhus
- Institute of Marine Research (IMR), 5817 Bergen, Norway
| | | | - Michael S Bank
- Institute of Marine Research (IMR), 5817 Bergen, Norway; University of Massachusetts, Amherst, MA, USA
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Chowdhury MH, Ghosh S, Kabir MR, Mamun MAA, Islam MS. Effect of supplementary omega-3 fatty acids on pregnant women with complications and pregnancy outcomes: review from literature. J Matern Fetal Neonatal Med 2020; 35:2564-2580. [PMID: 32643471 DOI: 10.1080/14767058.2020.1786522] [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: 10/23/2022]
Abstract
Numerous benefits have been associated with omega-3 fatty acid consumption during pregnancy and the postpartum period, whether it is consumed in the diet with seafood or via supplements such as fish oil. This review primarily aimed to assess the current situation of the impact of omega-3 long-chain Poly Unsaturated Fatty Acid (PUFA) supplementation on the outcomes of pregnancy. The electronic search of Medline, PubMed, Public Library of Science (PLOS) and Google Scholar databases was carried out for papers from 01 February 1995 to 01 March 2017 using keywords such as "pregnancy," "supplement," "long-chain polyunsaturated fatty acids," "omega 3 fatty acids," and "clinical trials." Out of twenty-six studies, both observational and interventional, fourteen studies found the influence of omega 3 fatty acids during pregnancy or the early postpartum period on the duration of gestation and infant size at birth, preeclampsia, depression, and infant visual function and neurodevelopment have been reported. Omega 3 fatty acid intakes (both in terms of absolute amounts of docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) and the ratio of these 2 fatty acids) varied widely in these studies, however, and no clear consensus exists regarding the effects of omega 3 fatty acids on any of these outcomes. Because of the potential importance of these fatty acids for pregnant or lactating women, fetus, and newborn infants and the limited data from clinical trials assessing the effect of these fatty acids on pregnancy and infant outcomes, additional research is required to better define optimal intakes of specific omega 3 fatty acids during these critical periods.
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Affiliation(s)
- Mohammad Hasan Chowdhury
- Department of Food Technology and Nutrition Science, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Susmita Ghosh
- Department of Food Technology and Nutrition Science, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Md Ruhul Kabir
- Department of Food Technology and Nutrition Science, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Md Abdullah Al Mamun
- Department of Food Technology and Nutrition Science, Noakhali Science and Technology University, Noakhali, Bangladesh
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24
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Desai G, Barg G, Vahter M, Queirolo EI, Peregalli F, Mañay N, Millen AE, Yu J, Browne RW, Kordas K. Low level arsenic exposure, B-vitamins, and achievement among Uruguayan school children. Int J Hyg Environ Health 2019; 223:124-131. [PMID: 31588016 DOI: 10.1016/j.ijheh.2019.09.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 09/21/2019] [Accepted: 09/27/2019] [Indexed: 11/17/2022]
Abstract
OBJECTIVES Millions of children globally, including the U.S., are exposed to low levels of arsenic from water and food. Arsenic is a known neurotoxicant at high levels but its effects at lower exposure levels are understudied. Arsenic methylation capacity, influenced by B-vitamin intake and status, potentially influences arsenic toxicity. In a cross-secitonal study of 5-8 year-old children from Montevideo, we assessed the relationship between urinary arsenic (U-As) and academic achievement, and tested for effect modification by B-vitamin intake, status, and arsenic methylation capacity. METHODS Broad math and reading scores were calculated based on six subtests (calculation, math facts fluency, applied problems, sentence reading fluency, letter word identification, passage comprehension) from the Woodcock-Muñoz Achievement Battery. B-vitamin intake was assessed from two non-consecutive 24-h dietary recalls, serum folate and vitamin B-12 levels were measured in a subset of participants. Arsenic methylation capacity was measured as the proportion of urinary monomethylarsonic acid (%MMA). Multiple imputation using chained equations was conducted to account for missing covariate and exposure data. Ordinal regressions assessed associations between U-As and achievement score tertiles in the complete case and imputed samples. A "B-vitamin index" was calculated using principal component analysis. Interactions by urinary %MMA and the B-vitamin index were assessed. RESULTS Median specific gravity adjusted U-As was 11.7 μg/L (range: 2.6, 50.1). We found no association between U-As and broad math and reading scores, nor effect modification by %MMA or B-vitamins. CONCLUSION At low-levels of exposure, U-As does not appear to affect children's academic achievement.
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Affiliation(s)
- Gauri Desai
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, The State University of New York (SUNY) at Buffalo, NY, USA.
| | - Gabriel Barg
- Department of Neurocognition, Catholic University of Uruguay, Montevideo, Uruguay
| | | | - Elena I Queirolo
- Center for Research, Catholic University of Uruguay, Montevideo, Uruguay
| | - Fabiana Peregalli
- Center for Research, Catholic University of Uruguay, Montevideo, Uruguay
| | - Nelly Mañay
- Faculty of Chemistry, University of the Republic of Uruguay, Montevideo, Uruguay
| | - Amy E Millen
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, The State University of New York (SUNY) at Buffalo, NY, USA
| | - Jihnhee Yu
- Department of Biostatistics, School of Public Health and Health Professions, The State University of New York (SUNY) at Buffalo, NY, USA
| | - Richard W Browne
- Department of Biotechnical and Clinical Laboratory Sciences, Jacobs School of Medicine and Biomedical Sciences, The State University of New York (SUNY) at Buffalo, NY, USA
| | - Katarzyna Kordas
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, The State University of New York (SUNY) at Buffalo, NY, USA
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25
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Ursinyova M, Masanova V, Uhnakova I, Murinova LP, Patayova H, Rausova K, Trnovec T, Stencl J, Gajdos M. Prenatal and Early Postnatal Exposure to Total Mercury and Methylmercury from Low Maternal Fish Consumption. Biol Trace Elem Res 2019; 191:16-26. [PMID: 30499063 DOI: 10.1007/s12011-018-1585-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 11/19/2018] [Indexed: 10/27/2022]
Abstract
The aim of this study was to investigate the influence of low fish consumption on prenatal and early postnatal exposure to mercury species. The samples of umbilical cord blood and maternal milk as well as interviewer-administered questionnaires were collected from 142 Slovak mother-child pairs. The mean total mercury (THg) concentrations in cord blood and milk were 0.949 μg/L and 0.376 μg/kg, respectively. The mean methylmercury (MeHg) concentration in cord blood was 0.504 μg/L. Fish eaters had significantly higher cord blood MeHg concentrations than non-fish eaters (p = 0.030); no difference was found in milk or cord blood THg concentrations. The bivariate analysis showed a positive correlation between cord blood MeHg and consumption of sea fish and shellfish (rs = 0.320, p < 0.001); after adjustment for the potential confounders, the association was weakened (β = 0.173, p = 0.059). Nevertheless, the decision tree method showed sea fish and shellfish consumption to be the best predictor of cord blood MeHg. Furthermore, a negative association was found between THg concentrations in maternal milk and freshwater fish consumption (β = - 0.193, p = 0.017), which might indicate a beneficial effect of freshwater fish consumption. The results suggest there is a need for future research to investigate the benefits versus the adverse effects of low maternal fish consumption on child development.
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Affiliation(s)
- Monika Ursinyova
- Department of Metallomics, Faculty of Medicine, Slovak Medical University in Bratislava, Limbova 12, 833 03, Bratislava, Slovak Republic.
| | - Vlasta Masanova
- Department of Metallomics, Faculty of Medicine, Slovak Medical University in Bratislava, Limbova 12, 833 03, Bratislava, Slovak Republic
| | - Iveta Uhnakova
- Department of Metallomics, Faculty of Medicine, Slovak Medical University in Bratislava, Limbova 12, 833 03, Bratislava, Slovak Republic
| | - Lubica Palkovicova Murinova
- Department of Environmental Medicine, Faculty of Public Health, Slovak Medical University in Bratislava, Limbova 12, 833 03, Bratislava, Slovak Republic
| | - Henrieta Patayova
- Department of Environmental Medicine, Faculty of Public Health, Slovak Medical University in Bratislava, Limbova 12, 833 03, Bratislava, Slovak Republic
| | - Katarina Rausova
- Department of Environmental Medicine, Faculty of Public Health, Slovak Medical University in Bratislava, Limbova 12, 833 03, Bratislava, Slovak Republic
| | - Tomas Trnovec
- Department of Environmental Medicine, Faculty of Public Health, Slovak Medical University in Bratislava, Limbova 12, 833 03, Bratislava, Slovak Republic
| | - Jan Stencl
- Honorary Rector, Slovak Medical University in Bratislava, Limbova 12, 833 03, Bratislava, Slovak Republic
| | - Martin Gajdos
- Department of Clinical and Experimental Pharmacotherapy, Faculty of Medicine, Slovak Medical University in Bratislava, Limbova 12, 833 03, Bratislava, Slovak Republic
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26
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Afrifa J, Opoku YK, Gyamerah EO, Ashiagbor G, Sorkpor RD. The Clinical Importance of the Mercury Problem in Artisanal Small-Scale Gold Mining. Front Public Health 2019; 7:131. [PMID: 31192183 PMCID: PMC6549531 DOI: 10.3389/fpubh.2019.00131] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 05/08/2019] [Indexed: 11/17/2022] Open
Abstract
Artisanal small-scale mining is widely operated in various countries serving as a livelihood to many rural communities. However, it is a significant source of environmental mercury contamination which affects human health. Amalgamation and amalgam smelting, two significant steps in the artisanal small-scale mining operations generate lots of mercury vapors, leading to chronic exposure among miners. Thus, this article seeks to provide a topical review of recent findings on organ damage and metabolic disorders among mercury-exposed artisanal small-scale miners with emphasis on the contributing factors such as personal protective equipment usage and artisanal small-scale gold mining-specific occupational activities. Also, insights into the effect of mercury intoxication and mechanisms of action on organ and metabolic systems among exposed individuals are provided.
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Affiliation(s)
- Justice Afrifa
- Department of Medical Laboratory Science, School of Allied Health Sciences, University of Cape Coast, Cape Coast, Ghana.,Scientific Research Center, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yeboah Kwaku Opoku
- Department of Biomedical Science, School of Allied Health Sciences, University of Cape Coast, Cape Coast, Ghana.,Biopharmaceutical Laboratory, College of Life Sciences, Northeast Agricultural University, Harbin, China
| | - Eric Ofori Gyamerah
- Department of Biochemistry, School of Biological Sciences, University of Cape Coast, Cape Coast, Ghana
| | - George Ashiagbor
- Department of Wildlife and Range Management, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
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27
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Exposure routes and health effects of heavy metals on children. Biometals 2019; 32:563-573. [DOI: 10.1007/s10534-019-00193-5] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Accepted: 03/22/2019] [Indexed: 02/07/2023]
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Puty B, Leão LKR, Crespo-Lopez ME, Almeida APCPSC, Fagundes NCF, Maia LC, Lima RR. Association between methylmercury environmental exposure and neurological disorders: A systematic review. J Trace Elem Med Biol 2019; 52:100-110. [PMID: 30732869 DOI: 10.1016/j.jtemb.2018.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Revised: 11/27/2018] [Accepted: 12/03/2018] [Indexed: 01/23/2023]
Abstract
The mercury-related central nervous system disorders have been extensively studied on animal models and human beings. However, clinical evidences of which neurological changes are in fact associated with mercury exposure remains controversial. This systematic review (Prospero registration under the number CRD42016041760) aimed to elucidate the association of methylmercury (MeHg) exposure with neurological alteration in populations living in MeHg-endemic risk area. A systematic search was performed according to the Preferred Reporting Items for Systematic Review and Meta-Analysis criteria using available databases PubMed, LILACS, Scopus, Web of Science, The Cochrane Library, OpenGrey and Google Scholar. A search of the following terms: "methylmercury compounds", "organomercury compounds", "neurologic manifestations", "memory disorders", "neurobehavioral manifestations" and "communication disorders" were performed in a systematic way. Studies focusing on MeHg exposure and subsequent neurological alteration on humans (>13 years) were included. Evaluation of methodological quality and risk of bias as well as the level of evidence was performed. Our results have identified 470 studies and six articles were eligible for systematic review inclusion criteria. The studies suggested alterations related to the psychosensory, motor and coordination system, as well as motor speech, hearing, visual impairment, mood alterations and loss of intelligent quotient. Of all the six studies, two presented a high risk of bias, with methodological problems related to the confounding factors and all studies presented evidence level ranged from very low to low. In this way our results revealed that a definitive demonstration of an association of MeHg and neurological alterations in human beings is still a pending subject. Future studies in this topic should take into consideration more confident and reliable methods to answer this question.
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Affiliation(s)
- Bruna Puty
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Para, Belem, Brazil.
| | - Luana Ketlen Reis Leão
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Para, Belem, Brazil.
| | - Maria Elena Crespo-Lopez
- Laboratory of Molecular Pharmacology, Institute of Biological Sciences, Federal University of Para, Belem, Brazil.
| | | | | | - Lucianne Cople Maia
- Department of Pediatric Dentistry and Orthodontics, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Rafael Rodrigues Lima
- Laboratory of Functional and Structural Biology, Institute of Biological Sciences, Federal University of Para, Belem, Brazil.
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Kvestad I, Vabø S, Kjellevold M, Nøstbakken OJ, Midtbø LK, Hysing M, Markhus MW, Madsen L, Handeland K, Graff IE, Lie Ø, Frøyland L, Stormark KM, Dahl L, Øyen J. Fatty fish, hair mercury and cognitive function in Norwegian preschool children: Results from the randomized controlled trial FINS-KIDS. ENVIRONMENT INTERNATIONAL 2018; 121:1098-1105. [PMID: 30360881 DOI: 10.1016/j.envint.2018.10.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 10/11/2018] [Accepted: 10/11/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The toxic effects of prenatal methylmercury (MeHg) include neurological abnormalities and developmental delay of which infants and children are particular susceptible. Studies on the effects of low and moderate exposure show conflicting results. Seafood is the main dietary source of MeHg, but also contributes with nutrients regarded as beneficial for development. OBJECTIVES To measure the change in total hair mercury concentration (THHg) after an intervention of lunch meals with fatty fish or meat in Norwegian preschool children, and to examine the associations between THHg and cognitive function. METHODS Children (n = 232) 4-6 years old were randomized to lunch meals with fatty fish (n = 114) or meat (n = 118) three times a week for 16 weeks. THHg was determined using a Direct Mercury Analyzer, and cognitive function was assessed by the Wechsler Preschool and Primary Intelligence Scale-III (WPPSI-III) pre- and post-intervention. Linear mixed effect models were used to analyze changes in THHg and WPPSI-III scores. RESULTS The mean (SD) THHg pre-intervention was 0.373 (0.204) mg kg-1. Children in the fish group had an increase in THHg (change 0.162, 95% CI 0.111, 0.213 mg kg-1), whereas children in the meat group had decreased THHg (-0.053, 95% CI -0.103, -0.002 mg kg-1). There were no notable associations between THHg and the WPPSI-III raw scores at baseline or after 16 weeks of the fish/meat intervention. CONCLUSIONS Lunch meals including fatty fish led to a significant increase in THHg, but the values remain below the point of departures used for risk assessment by the EFSA, WHO and US-EPA. We observed no associations between THHg and cognitive function.
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Affiliation(s)
- Ingrid Kvestad
- Regional Center for Child and Youth Mental Health and Child Welfare, NORCE Norwegian Research Center, Bergen, Norway
| | - Silje Vabø
- Institute of Marine Research, Bergen, Norway
| | | | | | | | - Mari Hysing
- Regional Center for Child and Youth Mental Health and Child Welfare, NORCE Norwegian Research Center, Bergen, Norway
| | | | - Lise Madsen
- Institute of Marine Research, Bergen, Norway
| | | | | | - Øyvind Lie
- Institute of Marine Research, Bergen, Norway
| | | | - Kjell Morten Stormark
- Regional Center for Child and Youth Mental Health and Child Welfare, NORCE Norwegian Research Center, Bergen, Norway
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30
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Determination of mercury in hair of children. Toxicol Lett 2018; 298:25-32. [DOI: 10.1016/j.toxlet.2018.06.1215] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 04/23/2018] [Accepted: 06/23/2018] [Indexed: 11/18/2022]
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Fish consumption prior to pregnancy and pregnancy outcomes in the National Birth Defects Prevention Study, 1997-2011. Public Health Nutr 2018; 22:336-343. [PMID: 30326983 DOI: 10.1017/s1368980018002641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To evaluate the relationships between maternal fish consumption and pregnancy outcomes in a large, population-based sample of women in the USA. DESIGN We collected average fish consumption prior to pregnancy using a modified version of the semi-quantitative Willett FFQ. We estimated adjusted OR (aOR) and 95 % CI for associations between different levels of fish consumption and preterm birth (<37 weeks), early preterm birth (<32 and <35 weeks) and small-for-gestational-age infants (SGA; <10th percentile). SETTING The National Birth Defects Prevention Study (NBDPS). SUBJECTS Control mother-infant pairs with estimated delivery dates between 1997 and 2011 (n 10 919). RESULTS No significant associations were observed between fish consumption and preterm birth or early preterm birth (aOR = 0·7-1·0 and 0·7-0·9, respectively). The odds of having an SGA infant were elevated (aOR = 2·1; 95 % CI 1·2, 3·4) among women with daily fish consumption compared with women consuming fish less than once per month. No associations were observed between other levels of fish consumption and SGA (aOR = 0·8-1·0). CONCLUSIONS High intake of fish was associated with twofold higher odds of having an SGA infant, while moderate fish consumption prior to pregnancy was not associated with preterm or SGA. Our study, like many other studies in this area, lacked information regarding preparation methods and the specific types of fish consumed. Future studies should incorporate information on nutrient and contaminant contents, preparation methods and biomarkers to assess these relationships.
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32
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Ghizoni H, Ventura M, Colle D, Gonçalves CL, de Souza V, Hartwig JM, Santos DB, Naime AA, Cristina de Oliveira Souza V, Lopes MW, Barbosa F, Brocardo PS, Farina M. Effects of perinatal exposure to n-3 polyunsaturated fatty acids and methylmercury on cerebellar and behavioral parameters in mice. Food Chem Toxicol 2018; 120:603-615. [DOI: 10.1016/j.fct.2018.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 08/01/2018] [Accepted: 08/02/2018] [Indexed: 12/20/2022]
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Barbone F, Rosolen V, Mariuz M, Parpinel M, Casetta A, Sammartano F, Ronfani L, Vecchi Brumatti L, Bin M, Castriotta L, Valent F, Little DL, Mazej D, Snoj Tratnik J, Miklavčič Višnjevec A, Sofianou K, Špirić Z, Krsnik M, Osredkar J, Neubauer D, Kodrič J, Stropnik S, Prpić I, Petrović O, Vlašić-Cicvarić I, Horvat M. Prenatal mercury exposure and child neurodevelopment outcomes at 18 months: Results from the Mediterranean PHIME cohort. Int J Hyg Environ Health 2018; 222:9-21. [PMID: 30057028 DOI: 10.1016/j.ijheh.2018.07.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 07/13/2018] [Accepted: 07/19/2018] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Neurotoxicity due to acute prenatal exposure to high-dose of mercury (Hg) is well documented. However, the effect of prenatal exposure to low Hg levels on child neurodevelopment and the question about "safety" of fish-eating during pregnancy remain controversial. International comparisons of Hg concentrations in mother-child biological samples and neurodevelopmental scores embedded in birth cohort studies may provide useful evidence to explore this issue. MATERIALS AND METHODS The Mediterranean (Italy, Slovenia, Croatia, and Greece) cohort study included 1308 mother-child pairs enrolled in the Public Health Impact of long-term, low-level, Mixed Element exposure in a susceptible population EU Sixth Framework Programme (PHIME). Maternal hair and venous blood, cord blood and breast milk samples were collected, and total Hg (THg) levels were measured. Demographic and socioeconomic information, lifestyles and nutritional habits were collected through questionnaires at different phases of follow-up. Children at 18 months of age underwent neurodevelopmental testing using the Bayley Scales of Infant and Toddler Development, Third Edition (BSID-III). Multivariate linear and logistic regressions were performed, for each country, to assess the association between THg and BSID-III scores, obtaining adjusted β coefficients and odds ratios (ORs). These values were used to conduct a meta-analysis, to explore possible heterogeneity among countries and to obtain combined estimates of the association between THg exposure and BSID-III scores. RESULTS Median THg (ng/g) was: 704 in maternal hair, 2.4 in maternal blood, 3.6 in cord blood, and 0.6 in breast milk. THg concentrations were highest in Greece and lowest in Slovenia. BSID-III neurodevelopmental scores were higher in Croatia and Slovenia. The meta-analysis of multivariate linear models found an overall positive association between language composite score and receptive communication scaled score and increasing THg in maternal hair (n = 1086; β = 0.55; 95%CI: 0.05-1.05 and n = 1075; β = 0.12; 95%CI: 0.02-0.22, respectively). The meta-analysis of logistic regression models showed that the overall adjusted OR between THg in cord blood and suboptimal gross motor score was borderline significant (n = 882; OR = 1.03; 95%CI: 1.00-1.07). Heterogeneity was found across the four sub-cohorts for language composite score in maternal blood, and for fine motor scaled score in cord blood and breast milk. Language composite score and THg concentrations in maternal venous blood were positively related (n = 58; β = 4.29; CI95% (-0.02, 8.60)) in Croatia and an increase of 1 ng/g of THg in maternal venous blood was associated with a reduced risk for children to fall in the lowest quintile of language score by 31% (n = 58; OR = 0.69; CI 95%: 0.37, 1.01). The comparison of β coefficients obtained by multiple linear regression model showed an inverse association between fine motor score and THg concentrations in cord blood for Croatia (n = 54; β = -0.53; CI 95%: -1.10, 0.04) and Slovenia (n = 225; β = -0.25; CI 95%: -0.49, -0.01). In Slovenia THg level in breast milk was associated with suboptimal fine motor performance (n = 195; OR = 5.25; CI 95%: 1.36, 21.10). CONCLUSIONS This study showed an inverse relation between THg levels and developmental motor scores at 18 months, although the evidence was weak and partially internally and externally inconsistent. No evidence of detrimental effects of THg was found for cognitive and language outcomes at these concentrations and age.
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Affiliation(s)
- Fabio Barbone
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", via dell'Istria, 65/1, 34137, Trieste, Italy.
| | - Valentina Rosolen
- Department of Medical Area, University of Udine, via Colugna 50, 33100, Udine, Italy.
| | - Marika Mariuz
- Department of Medical Area, University of Udine, via Colugna 50, 33100, Udine, Italy.
| | - Maria Parpinel
- Department of Medical Area, University of Udine, via Colugna 50, 33100, Udine, Italy.
| | - Anica Casetta
- Department of Medical Area, University of Udine, via Colugna 50, 33100, Udine, Italy.
| | - Francesca Sammartano
- Department of Medical Area, University of Udine, via Colugna 50, 33100, Udine, Italy.
| | - Luca Ronfani
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", via dell'Istria, 65/1, 34137, Trieste, Italy.
| | - Liza Vecchi Brumatti
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", via dell'Istria, 65/1, 34137, Trieste, Italy.
| | - Maura Bin
- Institute for Maternal and Child Health - IRCCS "Burlo Garofolo", via dell'Istria, 65/1, 34137, Trieste, Italy.
| | - Luigi Castriotta
- Institute of Hygiene and Clinical Epidemiology Academic Hospital of Udine, via Colugna 50, 33100, Udine, Italy.
| | - Francesca Valent
- Institute of Hygiene and Clinical Epidemiology Academic Hospital of Udine, via Colugna 50, 33100, Udine, Italy.
| | - D'Anna Latesha Little
- Azienda per I'Assistenza Sanitaria n. 5 Friuli Occidentale, via Piave 54 33170 Pordenone (PN), Italy.
| | - Darja Mazej
- Jozef Stefan Institute, Jamova 39 SI-1000, Ljubljana, Slovenia.
| | - Janja Snoj Tratnik
- Jozef Stefan Institute, Jamova 39 SI-1000, Ljubljana, Slovenia; International Postgraduate School Jozef Stefan, Jamova 39 SI-1000, Ljubljana, Slovenia.
| | | | - Katia Sofianou
- Institute of Child Health, "Aghia Sophia" Children's Hospital, Thivon & Papadiamantopoulou, Goudi, 115 27, Athens, Greece.
| | - Zdravko Špirić
- Green Infrastructure Ltd., Fallerovo Setaliste 22, 10.000, Zagreb, Croatia.
| | | | | | | | - Jana Kodrič
- University Medical Centre Ljubljana, Slovenia.
| | | | - Igor Prpić
- The Clinical Hospital Center of Rijeka, Krešimirova 42, 51000, Rijeka, Croatia.
| | - Oleg Petrović
- The Clinical Hospital Center of Rijeka, Krešimirova 42, 51000, Rijeka, Croatia.
| | | | - Milena Horvat
- Jozef Stefan Institute, Jamova 39 SI-1000, Ljubljana, Slovenia; International Postgraduate School Jozef Stefan, Jamova 39 SI-1000, Ljubljana, Slovenia.
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Developmental Origins of Disease: Emerging Prenatal Risk Factors and Future Disease Risk. CURR EPIDEMIOL REP 2018; 5:293-302. [PMID: 30687591 DOI: 10.1007/s40471-018-0161-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Purpose of review Many of the diseases and dysfunctions described in the paradigm of the developmental origins of health and disease have been studied in relation to prenatal nutrition or environmental toxicant exposures. Here, we selectively review the current research on four exposures-two nutritional and two environmental-that have recently emerged as prenatal risk factors for long-term health outcomes. Recent findings Recent studies have provided strong evidence that prenatal exposure to (1) excessive intake of sugar-sweetened beverages, (2) unhealthy dietary patterns, (3) perfluoroalkyl substances, and (4) fine particulate matter, may increase risk of adverse health outcomes, such as obesity, cardiometabolic dysfunction, and allergy/asthma. Summary Emerging prenatal nutritional factors and environmental toxicants influence offspring long-term health. More work is needed to identify the role of paternal exposures and maternal exposures during the preconception period and to further elucidate causality through intervention studies. The ubiquity of these emerging nutritional and environmental exposures makes this area of inquiry of considerable public health importance.
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Garza-Lombó C, Posadas Y, Quintanar L, Gonsebatt ME, Franco R. Neurotoxicity Linked to Dysfunctional Metal Ion Homeostasis and Xenobiotic Metal Exposure: Redox Signaling and Oxidative Stress. Antioxid Redox Signal 2018; 28:1669-1703. [PMID: 29402131 PMCID: PMC5962337 DOI: 10.1089/ars.2017.7272] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
SIGNIFICANCE Essential metals such as copper, iron, manganese, and zinc play a role as cofactors in the activity of a wide range of processes involved in cellular homeostasis and survival, as well as during organ and tissue development. Throughout our life span, humans are also exposed to xenobiotic metals from natural and anthropogenic sources, including aluminum, arsenic, cadmium, lead, and mercury. It is well recognized that alterations in the homeostasis of essential metals and an increased environmental/occupational exposure to xenobiotic metals are linked to several neurological disorders, including neurodegeneration and neurodevelopmental alterations. Recent Advances: The redox activity of essential metals is key for neuronal homeostasis and brain function. Alterations in redox homeostasis and signaling are central to the pathological consequences of dysfunctional metal ion homeostasis and increased exposure to xenobiotic metals. Both redox-active and redox-inactive metals trigger oxidative stress and damage in the central nervous system, and the exact mechanisms involved are starting to become delineated. CRITICAL ISSUES In this review, we aim to appraise the role of essential metals in determining the redox balance in the brain and the mechanisms by which alterations in the homeostasis of essential metals and exposure to xenobiotic metals disturb the cellular redox balance and signaling. We focus on recent literature regarding their transport, metabolism, and mechanisms of toxicity in neural systems. FUTURE DIRECTIONS Delineating the specific mechanisms by which metals alter redox homeostasis is key to understand the pathological processes that convey chronic neuronal dysfunction in neurodegenerative and neurodevelopmental disorders. Antioxid. Redox Signal. 28, 1669-1703.
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Affiliation(s)
- Carla Garza-Lombó
- 1 Redox Biology Center and School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln , Lincoln, Nebraska.,2 Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas , Universidad Nacional Autónoma de México, Mexico City, México
| | - Yanahi Posadas
- 3 Departamentos de Farmacología y de, Centro de Investigación y de Estudios Avanzados (CINVESTAV) , Mexico City, México .,4 Departamentos de Química, Centro de Investigación y de Estudios Avanzados (CINVESTAV) , Mexico City, México
| | - Liliana Quintanar
- 4 Departamentos de Química, Centro de Investigación y de Estudios Avanzados (CINVESTAV) , Mexico City, México
| | - María E Gonsebatt
- 2 Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas , Universidad Nacional Autónoma de México, Mexico City, México
| | - Rodrigo Franco
- 1 Redox Biology Center and School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln , Lincoln, Nebraska
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Peretti S, Mariano M, Mazzocchetti C, Mazza M, Pino MC, Verrotti Di Pianella A, Valenti M. Diet: the keystone of autism spectrum disorder? Nutr Neurosci 2018; 22:825-839. [PMID: 29669486 DOI: 10.1080/1028415x.2018.1464819] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Children with autism are characterized by an impairment of social interaction and repetitive patterns of behaviour. Autism is a heterogeneous span of disorders with unknown aetiology. Research has grown significantly and has suggested that environmental risk factors acting during the prenatal period could influence the neurodevelopment of offspring. The literature suggests that the maternal diet during pregnancy has a fundamental role in the etiopathogenesis of autism. Indeed, a maternal diet that is high in some nutrients has been associated with an increase or reduction in the risk of develop Autism Spectrum Disorders (ASD). The diet of ASD children is also a key factor for the worsening of ASD symptoms. Children with autism have food selectivity and limited diets due to smell, taste, or other characteristics of foods. This determines eating routines and food intake patterns, with consequent deficiency or excess of some aliments. Several studies have tried to show a possible relationship between nutritional status and autism. In this review we describe, emphasizing the limits and benefits, the main current empirical studies that have examined the role of maternal diet during gestation and diet of ASD children as modifiable risk factors at the base of development or worsening of symptoms of autism.
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Affiliation(s)
- S Peretti
- Department of Applied Clinical Sciences and Biotechnology, Section of Clinical Epidemiology and Environmental Medicine, University of L'Aquila, Via Vetoio, Località Coppito, 67100 L'Aquila, Italy.,Abruzzo Region Health System, Reference Regional Centre for Autism, L'Aquila, Italy
| | - M Mariano
- Department of Applied Clinical Sciences and Biotechnology, Section of Clinical Epidemiology and Environmental Medicine, University of L'Aquila, Via Vetoio, Località Coppito, 67100 L'Aquila, Italy.,Abruzzo Region Health System, Reference Regional Centre for Autism, L'Aquila, Italy
| | - C Mazzocchetti
- Department of Pediatrics, San Salvatore Hospital, University of L'Aquila, Località Coppito, L'Aquila 67100, Italy
| | - M Mazza
- Department of Applied Clinical Sciences and Biotechnology, Section of Clinical Epidemiology and Environmental Medicine, University of L'Aquila, Via Vetoio, Località Coppito, 67100 L'Aquila, Italy.,Abruzzo Region Health System, Reference Regional Centre for Autism, L'Aquila, Italy
| | - M C Pino
- Department of Applied Clinical Sciences and Biotechnology, Section of Clinical Epidemiology and Environmental Medicine, University of L'Aquila, Via Vetoio, Località Coppito, 67100 L'Aquila, Italy.,Abruzzo Region Health System, Reference Regional Centre for Autism, L'Aquila, Italy
| | - A Verrotti Di Pianella
- Department of Applied Clinical Sciences and Biotechnology, Section of Clinical Epidemiology and Environmental Medicine, University of L'Aquila, Via Vetoio, Località Coppito, 67100 L'Aquila, Italy.,Department of Pediatrics, San Salvatore Hospital, University of L'Aquila, Località Coppito, L'Aquila 67100, Italy
| | - M Valenti
- Department of Applied Clinical Sciences and Biotechnology, Section of Clinical Epidemiology and Environmental Medicine, University of L'Aquila, Via Vetoio, Località Coppito, 67100 L'Aquila, Italy.,Abruzzo Region Health System, Reference Regional Centre for Autism, L'Aquila, Italy
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37
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Freire C, Amaya E, Gil F, Fernández MF, Murcia M, Llop S, Andiarena A, Aurrekoetxea J, Bustamante M, Guxens M, Ezama E, Fernández-Tardón G, Olea N. Prenatal co-exposure to neurotoxic metals and neurodevelopment in preschool children: The Environment and Childhood (INMA) Project. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 621:340-351. [PMID: 29190557 DOI: 10.1016/j.scitotenv.2017.11.273] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 11/06/2017] [Accepted: 11/24/2017] [Indexed: 05/04/2023]
Abstract
We sought to determine whether prenatal co-exposure to As, Cd, Hg, Mn, and Pb was associated with impaired neurodevelopment in preschool children from the Spanish Environment and Childhood (INMA) Project, using the placenta as exposure matrix. We measured metal levels in placenta tissue samples randomly selected from five of the seven population-based birth cohorts participating in the INMA Project, collected between 2000 and 2008. Neuropsychological assessment of cognitive and motor function was carried through the use of the McCarthy Scales of Children's Abilities (MSCA) at the age of 4-5years. Data on placental metal levels, MSCA scores, and relevant covariates was available for 302 children. Mn was detected in all placental samples, Cd in nearly all placentas (99%) and As, Hg, and Pb in 22%, 58%, and 17% of the placentas, respectively. After adjusting for potential confounders, detectable As levels were associated with decrements in global and verbal executive functions and quantitative abilities; detectable Hg was associated with lower scores on the verbal function of posterior cortex in a dose-response manner, and non-linearly related to poorer motor function and gross motor skills; and Mn levels were associated with decrement in perceptual-performance skills in a dose-response manner but with better memory span and quantitative skills. A synergistic interactive effect was found between As and Pb with respect to the general cognitive score, whereas an antagonistic interaction was found between Mn and Hg. Prenatal exposure to As and Hg may be a risk factor for cognitive and motor impairment in children, while the effects of Cd and Mn on neurodevelopment are less clear. Future studies should examine combined and interactive effects of exposure to multiple metals during vulnerable periods of brain development prospectively.
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Affiliation(s)
- Carmen Freire
- Health Research Institute of Granada (ibs.GRANADA), 18012 Granada, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain
| | - Esperanza Amaya
- Health Research Institute of Granada (ibs.GRANADA), 18012 Granada, Spain
| | - Fernando Gil
- Department of Legal Medicine, Toxicology, and Physical Anthropology, School of Medicine, University of Granada, 18071 Granada, Spain
| | - Mariana F Fernández
- Health Research Institute of Granada (ibs.GRANADA), 18012 Granada, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; Department of Radiology, School of Medicine, and Centre for Biomedical Research, University of Granada, 18071 Granada, Spain.
| | - Mario Murcia
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; Epidemiology and Environmental Health Joint Research Unit, FISABIO-Jaume I University-University of Valencia, 46020 Valencia, Spain
| | - Sabrina Llop
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; Epidemiology and Environmental Health Joint Research Unit, FISABIO-Jaume I University-University of Valencia, 46020 Valencia, Spain
| | - Ainara Andiarena
- BIODONOSTIA Health Research Institute, 20014 San Sebastián, Spain; University of the Basque Country (UPV/EHU), 20018 San Sebastián, Spain
| | - Juanjo Aurrekoetxea
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; BIODONOSTIA Health Research Institute, 20014 San Sebastián, Spain; Department of Preventive Medicine and Public Health, University of Basque Country (UPV/EHU), 48940 Leioa, Bizkaia, Spain; Subdirección de Salud Pública de Gipuzkoa, Department of Health of the Basque Government, 20013 San Sebastián, Spain
| | - Mariona Bustamante
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), 08036 Barcelona, Spain; Pompeu Fabra Universtiy (UPF), 08002 Barcelona, Spain; Genomics and Disease Group, Bioinformatics and Genomics Program, Centre for Genomic Regulation (CRG), 08003 Barcelona, Spain
| | - Mònica Guxens
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; ISGlobal, Centre for Research in Environmental Epidemiology (CREAL), 08036 Barcelona, Spain; Pompeu Fabra Universtiy (UPF), 08002 Barcelona, Spain; Department of Child and Adolescent Psychiatry/Psychology, Erasmus University Medical Centre-Sophia Children's Hospital, 3015 CN Rotterdam, Netherlands
| | - Esteban Ezama
- Cicom, Alternativa en Salud Mental, 33001 Oviedo, Spain
| | - Guillermo Fernández-Tardón
- Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; Department of Preventive Medicine and Public Health, School of Medicine, University of Oviedo, 33003 Oviedo, Spain
| | - Nicolás Olea
- Health Research Institute of Granada (ibs.GRANADA), 18012 Granada, Spain; Spanish Consortium for Research on Epidemiology and Public Health (CIBERESP), Spain; Department of Radiology, School of Medicine, and Centre for Biomedical Research, University of Granada, 18071 Granada, Spain
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Karatela S, Ward NI, Zeng IS, Paterson J. Status and interrelationship of toenail elements in Pacific children. J Trace Elem Med Biol 2018; 46:10-16. [PMID: 29413098 DOI: 10.1016/j.jtemb.2017.11.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 11/05/2017] [Accepted: 11/06/2017] [Indexed: 01/02/2023]
Abstract
OBJECTIVE Elemental deficiencies or in excess effects growth and development. Pacific population are at a disadvantage due to food insecurity as compared to New Zealand European households. This study aims to evaluate the status and interrelationship of elements (essential, non-essential and toxic) in nine-year-old Pacific children who were part of the Pacific Island Families Study living in New Zealand. MATERIALS AND METHODS This observational study included 278 eligible nine-year-old children. Essential elements (including calcium, chromium, cobalt, copper, iodine, iron, magnesium, manganese, selenium, zinc, molybdenum), non-essential and toxic elements (arsenic, aluminum, antimony, boron, cadmium, lead, mercury, nickel,) were determined in toenails and after acid digestion, analysed using inductively coupled plasma mass spectrometry. Principal component analysis and multivariate analysis of covariance was used to identify differences in the groups of elements and the inter-correlations between elements. RESULTS The mean calcium (868μg/g Ca), selenium (0.35μg/g Se) and zinc (129μg/g Zn) concentrations were lower while the mean cadmium (0.21μg/g Cd) lead (0.86μg/g Pb) and mercury (0.72μg/g Hg) concentrations were higher than the optimal health requirements. Ethnic differences in relation to toenail elemental concentrations were observed for aluminium and iron. Gender differences were observed for aluminium, antimony, arsenic and lead. Selenium and molybdenum were inversely associated with mercury. Manganese, zinc and calcium were positively associated. CONCLUSIONS This research contributes to the understanding of the elemental concentrations for Pacific children by using tissue samples from toenails, which improves the completeness of sampling than other tissues and provides a longer exposure time frame. The study also reports several inter-correlations between essential, non-essential and toxic elements in Pacific Island population.
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Affiliation(s)
- Shamshad Karatela
- University of Queensland, Faculty of Medicine School of Public Health, Herston Road, Herston, QLD 4006, Australia.
| | - Neil I Ward
- University of Surrey, Department of Chemistry FEPS, Guildford, Surrey GU2 7XH, UK
| | - Irene Suilan Zeng
- Middlemore Hospital, 100 Hospital Road, Otahuhu, 1640, Auckland, New Zealand
| | - Janis Paterson
- AUT University, School of Public Health and Psychosocial Studies, Auckland, New Zealand
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Rideout K, Kosatsky T. Fish for Dinner? Balancing Risks, Benefits, and Values in Formulating Food Consumption Advice. RISK ANALYSIS : AN OFFICIAL PUBLICATION OF THE SOCIETY FOR RISK ANALYSIS 2017; 37:2041-2052. [PMID: 28314053 DOI: 10.1111/risa.12769] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 11/16/2016] [Accepted: 12/22/2016] [Indexed: 06/06/2023]
Abstract
Many and complex factors underlie seemingly simple decisions about what to eat. This is particularly so for foods such as fish, which present consumers with both risks and benefits. Advice about what type of and how much fish to consume is abundant, but that advice is often confusing or contradictory, reflecting the differing mandates and orientations of those advising. We survey a range of issues that can and should be incorporated into dietary advice, and offer tools for health agencies tasked with providing it. We argue that risks and benefits should not be limited to direct physical health. Rather, socioeconomic and community factors, unintended or indirect effects, and nonhuman-health outcomes such as animal welfare and planetary health should also be considered and weighed. We provide examples of existing fish consumption guidance to highlight the conflicting messages that emerge when different sources of advice with singular aims of avoiding risk, gaining nutritional benefit, or sustaining fish populations are juxtaposed. We then offer tools borrowed from health and other fields to guide health agencies toward developing more comprehensive advice and targeting that advice for specific populations.
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Affiliation(s)
- Karen Rideout
- British Columbia Centre for Disease Control, Environmental Health Services, Vancouver, BC, Canada
- National Collaborating Centre for Environmental Health, Vancouver, BC, Canada
| | - Tom Kosatsky
- British Columbia Centre for Disease Control, Environmental Health Services, Vancouver, BC, Canada
- National Collaborating Centre for Environmental Health, Vancouver, BC, Canada
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Gaitán AV, Drewery ML, Thaxton CA, Carabante KM, Seidemann E, Elkind-Hirsch K, Lammi-Keefe CJ. Dietary Intake and Omega-3 DHA Status in Pregnant Women Who Are Overweight. J Obstet Gynecol Neonatal Nurs 2017; 47:438-450. [PMID: 29040821 DOI: 10.1016/j.jogn.2017.08.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/01/2017] [Indexed: 11/26/2022] Open
Abstract
OBJECTIVE To estimate dietary intake of pregnant women who are overweight, assess their omega-3 docosahexaenoic acid (DHA) status, and compare results between Black and White women. DESIGN Cross-sectional study with a longitudinal component (dietary assessment). SETTING Outpatient clinics at Woman's Hospital, Baton Rouge, Louisiana and telephone calls. PARTICIPANTS Pregnant women (N = 21) who were overweight (body mass index = 25.0-29.9 kg/m2). METHODS Repeated 24-hour dietary recalls using the University of Minnesota Nutrition Data System for Research were conducted to determine nutrient intakes. Red blood cell fatty acids were analyzed with gas chromatography to determine omega-3 DHA status. Descriptive statistics, one- and two-sample t tests, Fisher's exact tests, chi-square test, and analysis of covariance were used to analyze data. RESULTS On average, participants consumed 72 ± 63 mg omega-3 DHA/day. Age, race, and socioeconomic status did not affect the probability of achieving recommended omega-3 DHA dietary intake (p > .05). Black women had lower omega-3 DHA status (7.98 ± 0.94 weight percentage) than White women (9.29 ± 1.68 weight percentage; p ≤ .05). CONCLUSION Analysis of our data suggests a need for nutrition education regarding the benefits of omega-3 DHA consumption during pregnancy for women of childbearing age. The current finding warrants further exploration.
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Thuppal SV, von Schacky C, Harris WS, Sherif KD, Denby N, Steinbaum SR, Haycock B, Bailey RL. Discrepancy between Knowledge and Perceptions of Dietary Omega-3 Fatty Acid Intake Compared with the Omega-3 Index. Nutrients 2017; 9:nu9090930. [PMID: 28837086 PMCID: PMC5622690 DOI: 10.3390/nu9090930] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 08/18/2017] [Accepted: 08/21/2017] [Indexed: 11/30/2022] Open
Abstract
Little is known about the relationship between perceptions of nutrient adequacy and biomarkers of nutrition status. This cross-sectional study of U.S. and German adults (n = 200; 18–80 years) compared dietary practices, knowledge, and beliefs of omega-3 fatty acids (O3-FA) with the omega-3 index (O3-I), an erythrocyte-based biomarker associated with cardiovascular disease (CVD) risk. More than half of adults believed that O3-FAs are beneficial for heart and brain health and could correctly identify the food sources of O3-FA. However, the mean O3-I in the U.S. (4.3%) and Germany (5.5%) puts the majority of adults sampled (99%) in intermediate or high CVD-risk categories. More Americans were considered at high CVD-risk (40%) when compared with Germans (10%). In the U.S., but not Germany, women had a significantly higher O3-I than men (4.8% vs. 3.8%, p < 0.001). In the intermediate CVD-risk group, about one-third of adults in both countries (30% in the U.S. and 27% in Germany) believed their diet was adequate in O3-FA. Notably, mean O3-I concentrations did not significantly differ with dietary perceptions of adequacy. More adults in Germany (26%) than in the U.S. (10%) believed that dietary supplements are needed to achieve a balanced diet. In spite of adequate knowledge about food sources and a consistent belief that O3-FA are important for health, very few participants had O3-I concentrations in the range for CVD protection.
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Affiliation(s)
- Sowmyanarayanan V Thuppal
- Department of Nutrition Science, Purdue University, Room 143, 700 West State Street, West Lafayette, IN 47906, USA.
| | - Clemens von Schacky
- Department of Preventive Cardiology, Medizinische Klinik and Poliklinik I, Campus Innenstadt, Ludwig Maximilians University, Ziemssen str.1, D-80336 Munich, Germany.
| | - William S Harris
- Department of Medicine, Sanford School of Medicine, University of South Dakota, Health Science Center, 1400 West 22nd Street, Sioux Falls, SD 57105, USA.
- OmegaQuant Analytics, LLC, 5009 W. 12th Street, Suite 8, Sioux Falls, SD 57106, USA.
| | - Katherine D Sherif
- Jefferson Women's Primary, 211 S. 9th Street, Walnut Towers, Ste. 401, Philadelphia, PA 19107, USA.
| | - Nigel Denby
- Grub4Life and People Matter TV, 40 Bowling Green Lane, Clerkenwell, London EC1R 0NE, UK.
| | - Suzanne R Steinbaum
- Women and Heart Disease Center, Lenox Hill Hospital, 110 East 59th Street, New York, NY 10022, USA.
| | - Bryan Haycock
- Department of Nutrition and Integrative Physiology, University of Utah, 201 South Presidents Circle Room 201, Salt Lake City, UT 84112, USA.
| | - Regan L Bailey
- Department of Nutrition Science, Purdue University, Stone Hall, Room 143A, 700 West State Street, West Lafayette, IN 47906, USA.
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The Putative Role of Environmental Mercury in the Pathogenesis and Pathophysiology of Autism Spectrum Disorders and Subtypes. Mol Neurobiol 2017; 55:4834-4856. [DOI: 10.1007/s12035-017-0692-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Accepted: 07/13/2017] [Indexed: 01/28/2023]
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Changes in Hair Mercury Levels Among Women of Child-Bearing Age Following an Educational Intervention. J Occup Environ Med 2017; 59:528-534. [PMID: 28430677 DOI: 10.1097/jom.0000000000001007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Describe mercury exposures among women of childbearing age before and after an educational intervention. METHODS Women age 18 to 45 were recruited to participate in an educational intervention concerning fish consumption. Fish consumption habits and total mercury concentration in hair were assessed pre- and post-intervention. Regression models examined associations between mercury, fish consumption, and demographics. RESULTS Overall, 234 women completed the study. On average, mercury concentrations increased by 0.01 ppm (parts per million) following the intervention, despite declines in fish consumption; however, women in the 90th percentile for mercury at baseline decreased concentrations significantly while maintaining high rates of fish consumption. Mercury concentrations were positively correlated with fish consumption and certain demographic characteristics. CONCLUSIONS The intervention reached individuals most at-risk. Healthcare providers should discuss fish consumption habits with women to encourage consumption of low-risk fish, and identify women needing education and counseling.
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Butler LJ, Janulewicz PA, Carwile JL, White RF, Winter MR, Aschengrau A. Childhood and adolescent fish consumption and adult neuropsychological performance: An analysis from the Cape Cod Health Study. Neurotoxicol Teratol 2017; 61:47-57. [PMID: 28263856 DOI: 10.1016/j.ntt.2017.03.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2016] [Revised: 02/27/2017] [Accepted: 03/02/2017] [Indexed: 11/18/2022]
Abstract
OBJECTIVE This exploratory analysis examines the relationship between childhood and adolescent fish consumption and adult neuropsychological performance. DESIGN Data from a retrospective cohort study that assessed fish consumption from age 7 to 18years via questionnaire were analyzed. A subset of the population underwent domain-specific neuropsychological assessment. Functions evaluated included omnibus intelligence, academic achievement, language, visuospatial skills, learning and memory, attention and executive function, fine motor coordination, mood, and motivation to perform. SETTING Eight towns in the Cape Cod region of Massachusetts, USA, an area characterized by high fish consumption and an active seafood industry. SUBJECTS A cohort of 1245 subjects was recruited based on Massachusetts birth records from 1969 to 1983. Sixty-five participants from the original cohort underwent neuropsychological testing in adulthood (average age=30years). RESULTS Participant report of consuming fish at least twice per month was associated with better performance on tests of visual learning, memory, and attentional abilities. However, self-report of consuming fish at rates higher than twice per month was not associated with improved abilities. No statistically significant associations were observed between type of fish consumed (e.g., species known to be high in methylmercury content) and test outcomes. CONCLUSIONS The results suggest that moderate fish consumption during childhood and adolescence may be associated with some cognitive benefits and that consumption of fish during this exposure window may potentially influence adult neuropsychological performance. Future prospective studies should take into account this time period of exposure.
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Affiliation(s)
- Lindsey J Butler
- Department of Environmental Health, Boston University School of Public Health, Medical Campus, 715 Albany Street, T4W, Boston, MA 02118, United States; Department of Epidemiology, Boston University School of Public Health, Medical Campus, 715 Albany Street, T4E, Boston, MA 02118, United States.
| | - Patricia A Janulewicz
- Department of Environmental Health, Boston University School of Public Health, Medical Campus, 715 Albany Street, T4W, Boston, MA 02118, United States
| | - Jenny L Carwile
- Department of Epidemiology, Boston University School of Public Health, Medical Campus, 715 Albany Street, T4E, Boston, MA 02118, United States
| | - Roberta F White
- Department of Environmental Health, Boston University School of Public Health, Medical Campus, 715 Albany Street, T4W, Boston, MA 02118, United States
| | - Michael R Winter
- Data Coordinating Center, Boston University, Medical Campus, 85 East Newton Street, M921, Boston, MA 02118, United States
| | - Ann Aschengrau
- Department of Epidemiology, Boston University School of Public Health, Medical Campus, 715 Albany Street, T4E, Boston, MA 02118, United States
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Carwile JL, Butler LJ, Janulewicz PA, Winter MR, Aschengrau A. Childhood Fish Consumption and Learning and Behavioral Disorders. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13111069. [PMID: 27827868 PMCID: PMC5129279 DOI: 10.3390/ijerph13111069] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 10/20/2016] [Accepted: 10/25/2016] [Indexed: 01/27/2023]
Abstract
Fish is a major source of nutrients critical for brain development during early life. The importance of childhood fish consumption is supported by several studies reporting associations of n-3 polyunsaturated fatty acid (n-3 PUFA) supplementation with better behavior and school performance. However, fish may have a different effect than n-3 PUFA alone due to the neurotoxic effects of methylmercury, a frequent contaminant. We investigated associations of childhood fish consumption with learning and behavioral disorders in birth cohort study of the neurotoxic effects of early life exposure to solvent-contaminated drinking water. Childhood (age 7–12 years) fish consumption and learning and behavioral problems were reported in self-administered questionnaires (age 23–41 at questionnaire completion). Fish consumption was not meaningfully associated with repeating a grade, tutoring, attending summer school, special class placement, or low educational attainment. However, participants who ate fish several times a week had an elevated odds of Attention Deficit Disorder/Attention Deficit Hyperactivity Disorder (odds ratio: 5.2; 95% confidence interval: 1.5–18) compared to participants who did not eat fish. While these findings generally support the safety of the observed level of fish consumption, the absence of a beneficial effect may be attributed to insufficient fish intake or the choice of relatively low n-3 PUFA fish.
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Affiliation(s)
- Jenny L Carwile
- Department of Epidemiology, Boston University School of Public Health, Boston, MA 02118, USA.
| | - Lindsey J Butler
- Department of Epidemiology, Boston University School of Public Health, Boston, MA 02118, USA.
| | - Patricia A Janulewicz
- Department of Environmental Health, Boston University School of Public Health, Boston, MA 02118, USA.
| | - Michael R Winter
- Data Coordinating Center, Boston University School of Public Health, Boston, MA 02118, USA.
| | - Ann Aschengrau
- Department of Epidemiology, Boston University School of Public Health, Boston, MA 02118, USA.
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Zieminska E, Lenart J, Lazarewicz JW. Select putative neurodevelopmental toxins modify SNAP-25 expression in primary cultures of rat cerebellar granule cells. Toxicology 2016; 370:86-93. [PMID: 27693314 DOI: 10.1016/j.tox.2016.09.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 09/22/2016] [Accepted: 09/26/2016] [Indexed: 11/19/2022]
Abstract
A presynaptic protein SNAP-25 belonging to SNARE complex which is instrumental in intracellular vesicular trafficking and exocytosis, has been implicated in hyperactivity and cognitive abilities in some neuropsychiatric disorders. The unclear etiology of the behavior disrupting neurodevelopmental disabilities in addition to genetic causes most likely involves environmental factors. The aim of this in vitro study was to test if various suspected developmental neurotoxins can alter SNAP-25 mRNA and protein expression in neurons. Real-time PCR and Western blotting analyses were used to assess SNAP-25 mRNA and protein levels in primary cultures of rat cerebellar granule cells (CGCs). The test substances: tetrabromobisphenol-A (TBBPA), thimerosal (TH), silver nanoparticles (NAg), valproic acid (VPA) and thalidomide (THAL), were administered to CGC cultures at subtoxic concentrations for 24h. The results demonstrated that SNAP-25 mRNA levels were increased by 49 and 66% by TBBPA and THAL, respectively, whereas VPA and NAg reduced these levels to 48 and 64% of the control, respectively. The SNAP-25 protein content in CGCs was increased by 79% by TBBPA, 25% by THAL and 21% by NAg; VPA and TH reduced these levels to 73 and 69% of the control, respectively. The variety of changes in SNAP-25 expression on mRNA and protein level suggests the diversity of the mechanism of action of the test substances. This initial study provided no data on concentration-effect relations and on functional changes in CGCs. However it is the first to demonstrate the effect of different compounds that are suspected of causing neurodevelopmental disabilities on SNAP-25 expression. These results suggest that this protein may be a common target for not only inherited but also environmental modifications linked to behavioral deficits in neurodevelopmental disabilities.
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Affiliation(s)
- Elzbieta Zieminska
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, Pawinskiego 5, 02-106 Warsaw, Poland.
| | - Jacek Lenart
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, Pawinskiego 5, 02-106 Warsaw, Poland.
| | - Jerzy W Lazarewicz
- Department of Neurochemistry, Mossakowski Medical Research Centre, Polish Academy of Sciences, Pawinskiego 5, 02-106 Warsaw, Poland.
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Al-Saleh I, Elkhatib R, Al-Rouqi R, Abduljabbar M, Eltabache C, Al-Rajudi T, Nester M. Alterations in biochemical markers due to mercury (Hg) exposure and its influence on infant's neurodevelopment. Int J Hyg Environ Health 2016; 219:898-914. [PMID: 27453562 DOI: 10.1016/j.ijheh.2016.07.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 06/26/2016] [Accepted: 07/01/2016] [Indexed: 01/04/2023]
Abstract
This study examined the role of oxidative stress due to mercury (Hg) exposure on infant's neurodevelopmental performance. A total of 944 healthy Saudi mothers and their respective infants (aged 3-12 months) were recruited from 57 Primary Health Care Centers in Riyadh City. Total mercury (Hg) was measured in mothers and infants urine and hair samples, as well as mother's blood and breast milk. Methylmercury (MeHg) was determined in the mothers and infants' hair and mother's blood. Urinary 8-hydroxy-2'-deoxyguanosine (8-OHdG), malondialdehyde (MDA), and porphyrins were used to assess oxidative stress. The infant's neurodevelopment was evaluated using Denver Developmental Screening Test II (DDST-II) and Parents' Evaluation of Developmental Status. The median total Hg levels in mother's urine, infant's urine, mother's hair, infant's hair, and mother's blood and breast milk were 0.995μg/l, 0.716μg/l, 0.118μg/g dw, 0.101μg/g dw, 0.635μg/l, and 0.884μg/l respectively. The median MeHg levels in mother's hair, infant's hair, and mother's blood were 0.132μg/g dw, 0.091μg/g dw, and 2.341μg/l respectively. A significant interrelationship between mothers and infants Hg measures in various matrices was noted. This suggests that mother's exposure to different forms of Hg (total and/or MeHg) from various sources contributed significantly to the metal body burden of their respective infants. Even though Hg exposure was low, it induced high oxidative stress in mothers and infants. The influence of multiplicative interaction terms between Hg measures and oxidative stress biomarkers was tested using multiple regression analysis. Significant interactions between the urinary Hg levels in mothers and infants and oxidative stress biomarkers (8-OHdG and MDA) were noted. The MeHg levels in mother-infant hair revealed similar interaction patterns. The p-values for both were below 0.001. These observations suggest that the exposure of our infants to Hg via mothers either during pregnancy and/or neonatal life, promoted oxidative stress that might have played a role in infant neurodevelopmental delays that we reported previously. The results confirmed that the interaction between infant's MeHg in hair and 8-OHdG and MDA levels was significantly associated with a delay in DDST-II performance (ß=-0.188, p=0.028). This finding provides an insight into the potential consequences of Hg-induced oxidative stress to infant's cognitive neurodevelopment for the first time. This observation still needs future studies to be validated. Given the low MeHg levels in our population, these findings are of particular importance.
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Affiliation(s)
- Iman Al-Saleh
- Environmental Health Program, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia.
| | - Rola Elkhatib
- Environmental Health Program, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
| | - Reem Al-Rouqi
- Environmental Health Program, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
| | - Mai Abduljabbar
- Environmental Health Program, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
| | - Chafica Eltabache
- Environmental Health Program, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
| | - Tahreer Al-Rajudi
- Environmental Health Program, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
| | - Michael Nester
- Department of Neurosciences, King Faisal Specialist Hospital and Research Centre, PO Box: 3354, Riyadh 11211, Saudi Arabia
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Hu Y, Chen L, Wang C, Zhou Y, Zhang Y, Wang Y, Shi R, Gao Y, Tian Y. Prenatal low-level mercury exposure and infant neurodevelopment at 12 months in rural northern China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:12050-12059. [PMID: 26965274 DOI: 10.1007/s11356-016-6395-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 02/29/2016] [Indexed: 06/05/2023]
Abstract
Although MeHg is a confirmed neurotoxin at sufficiently high dosages, the effect of prenatal low-level Hg exposure on infant neurodevelopment is still unknown. Four hundred ten mother-infant pairs were recruited in rural northern China from September 2010 to September 2012. We investigated maternal diet during pregnancy, collected maternal and umbilical blood samples, and tested infant neurodevelopment using Gesell developmental schedules (GDS) at the age of 1 year old. The geometric means (GM) of Hg exposure in maternal and umbilical blood were 0.72 and 1.2 μg/L, respectively. Positive associations between Hg levels and the frequency of total fish consumption were found (Spearman's correlation, r = 0.09 for maternal Hg, r = 0.14 for umbilical Hg, p < 0.01). After adjusting for confounding factors, we found a log-unit increase in umbilical blood Hg levels was associated with a 4.22-point (95 % confidence interval (95 %CI) 0.77 to 7.67) increase in the adaptive domain and a 4.06-point (95 %CI 0.51 to 7.62) increase in the social domain. No significant association has been found between other domains and Hg levels in our study. In further analysis, we noticed the positive correlation between the developmental quotient (DQ) scores of the adaptive domain and frequencies of total fish consumption (p = 0.04). Our results failed to indicate the adverse effects between prenatal Hg exposure and infant neurodevelopment. However, given the low-level Hg exposure and its predominant source, the potential positive associations in our study may be attributed to the beneficial nutrients of fish consumption.
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Affiliation(s)
- Yi Hu
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, 200025, Shanghai, China
| | - Limei Chen
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, 200025, Shanghai, China
| | - Caifeng Wang
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, 200025, Shanghai, China
| | - Yijun Zhou
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, 200025, Shanghai, China
| | - Yan Zhang
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, 200025, Shanghai, China
| | - Yiwen Wang
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, 200025, Shanghai, China
| | - Rong Shi
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, 200025, Shanghai, China
| | - Yu Gao
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, 200025, Shanghai, China.
| | - Ying Tian
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, 200025, Shanghai, China.
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van der Wurff ISM, Bakker EC, Hornstra G, Kirschner PA, Gielen M, Godschalk RWL, Kremers S, Zeegers MP, de Groot RHM. Association between prenatal and current exposure to selected LCPUFAs and school performance at age 7. Prostaglandins Leukot Essent Fatty Acids 2016; 108:22-9. [PMID: 27154361 DOI: 10.1016/j.plefa.2016.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 03/04/2016] [Accepted: 03/04/2016] [Indexed: 01/25/2023]
Abstract
INTRODUCTION Long-chain polyunsaturated fatty acids (LCPUFAs) are important for brain functioning and might, thus, influence cognition and school performance. However, research investigating LCPUFAs relationships with school performance is limited. The objective of this study was to determine the association between levels of the LCPUFAs docosahexaenoic acid (DHA), arachidonic acid (AA), eicosapentaenoic acid (EPA) and n-6 docosapentaenoic acid (Osbond acid, ObA) at study entry, 22 weeks of pregnancy, 32 weeks of pregnancy, at partus, in umbilical cord plasma and child's plasma at age 7 and school performance scores at age 7. METHODS Data from the Maastricht Essential Fatty Acid Birth cohort (MEFAB) were used for this study. Fatty acid levels of plasma phospholipids were measured in maternal blood plasma at study entry, 22 weeks of pregnancy, 32 weeks of pregnancy and partus. Childs fatty acid levels of plasma phospholipids were measured a in umbilical cord blood plasma, and in blood plasma of the child at age 7. Scores on national standardised tests for spelling, reading and arithmetic at age 7 were obtained via the school (scores were available for 149, 159 and 155 children, respectively). Associations between LCPUFA levels and school performance scores were analysed with categorical regression analyses with correction for covariates (smoking, maternal education, sex, breastfeeding, maternal intelligence, birth weight and BMI at age 7). RESULTS Significant (p<0.001) associations between DHA level at age 7 and both reading (β=0.158) and spelling (β=0.146) were found. Consistent significant negative associations were observed between all maternal DHA plasma levels and arithmetic scores at age 7 (all p<0.001, all β<-0.019). Additional significant negative associations were observed between maternal LCPUFA plasma levels at study entry and both reading and spelling scores at age 7; these associations were less consistent. CONCLUSION Plasma DHA levels at age 7 were positively associated with reading and spelling scores at age 7. Consistent significant negative associations between maternal plasma DHA levels and arithmetic scores of the child at age 7 were found. Although this is an observational study, which cannot proof causality, the consistent negative associations observed between maternal plasma DHA levels and the arithmetic scores of the children at age 7 calls upon prudence when considering DHA supplementation during pregnancy.
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Affiliation(s)
- I S M van der Wurff
- Faculty of Psychology and Educational Sciences, Welten Institute, Open University of the Netherlands, Heerlen, The Netherlands.
| | - E C Bakker
- Faculty of Psychology and Educational Sciences, Open University of the Netherlands, Heerlen, The Netherlands
| | - G Hornstra
- Maastricht University (retired) and Nutrisearch, Gronsveld, The Netherlands
| | - P A Kirschner
- Faculty of Psychology and Educational Sciences, Welten Institute, Open University of the Netherlands, Heerlen, The Netherlands
| | - M Gielen
- NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - R W L Godschalk
- NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - S Kremers
- NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - M P Zeegers
- NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands; CAPHRI School for Public Health and Primary Care Maastricht University, Maastricht, The Netherlands
| | - R H M de Groot
- Faculty of Psychology and Educational Sciences, Welten Institute, Open University of the Netherlands, Heerlen, The Netherlands; NUTRIM School for Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
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Karimi R, Vacchi-Suzzi C, Meliker JR. Mercury exposure and a shift toward oxidative stress in avid seafood consumers. ENVIRONMENTAL RESEARCH 2016; 146:100-107. [PMID: 26745733 PMCID: PMC6191849 DOI: 10.1016/j.envres.2015.12.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 12/18/2015] [Accepted: 12/19/2015] [Indexed: 05/29/2023]
Abstract
Mechanisms of mercury (Hg) toxicity at low doses from seafood consumption, the most common exposure route, are not well understood. We tested the hypothesis that seafood Hg exposure is related to a shift in redox status, indicated by a decrease in the ratio of reduced to oxidized glutathione (GSH:GSSG) in blood, or increase in redox potential (Eh). We also examined whether key seafood nutrients (selenium (Se), omega-3 fatty acids) confound or modify this shift. We measured blood concentrations of total Hg, Se, GSH, GSSG, and the Omega-3 Index (% omega-3s of total fatty acids in red blood cell membranes) in seafood consumers in Long Island, NY. We examined relationships between Hg, GSH:GSSG ratio and Eh. Elevated blood Hg (>5.8µgL(-1)) was associated with lower GSH:GSSG (β=-116.73, p=0.01), with no evidence of confounding by Se or Omega-3 Index. However, in models stratified by Omega-3 Index levels, Hg-GSH:GSSG associations were weakened among those with high Omega-3 Index levels (>6% of fatty acids, β=-63.46, p=0.28), and heightened among those with low Omega-3 Index (β=-182.53, p<0.01). We observed comparable patterns for Eh in relation to Hg. These results support the hypothesis that Hg exposure from seafood is linked to a shift in redox status toward oxidative stress, modified by omega-3 fatty acids in this population. Further work should examine the role of different seafood nutrients and Hg-induced shifts in redox status in the diverse health effects associated with elevated Hg exposure.
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Affiliation(s)
- Roxanne Karimi
- Stony Brook University, School of Marine and Atmospheric Sciences, Stony Brook, NY 11794-5000, USA.
| | | | - Jaymie R Meliker
- Stony Brook University, Department of Preventive Medicine, Stony Brook, NY, USA; Stony Brook University, Program in Public Health, Stony Brook, NY, USA
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