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Cary TL, Karasov WH. Larval Exposure to Polychlorinated Biphenyl-126 Led to a Long-Lasting Decrease in Immune Function in Postmetamorphic Juvenile Northern Leopard Frogs, Lithobates pipiens. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:81-94. [PMID: 34807990 DOI: 10.1002/etc.5233] [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: 02/02/2021] [Revised: 10/01/2021] [Accepted: 10/17/2021] [Indexed: 06/13/2023]
Abstract
Amphibian populations are decreasing worldwide, and pollution is a contributing factor. Polychlorinated biphenyls (PCBs) are a class of persistent organic pollutants known to exert immunotoxicity. To assess impacts of PCBs on frogs, we exposed Lithobates pipiens tadpoles to a diet of PCB-126 (0-5 ng PCB-126/g wet food) through metamorphic climax. Postmetamorphic frogs were immunized with keyhole limpet hemocyanin (KLH); then production of KLH-specific IgY, as well as total IgY and IgM, was measured (Trial I). A second larval study (0 and 7.3 ng PCB-126/g wet food) was performed to investigate whether PCB altered antigenic responses in prometamorphic tadpoles (Gosner Stage 36-39), and to measure the innate immune response of postmetamorphic frogs (Trial II). After larval PCB-126 exposure, both KLH-specific IgY levels and complement activity were reduced. Because postmetamorphic frogs carried a body burden of PCB-126 (2.4 ng/g or less), we wanted to determine whether the effect on immune response was due to larval exposure or to the resulting body burden as frogs. To test this, we reared tadpoles under control conditions (no PCB), and limited PCB exposure to postmetamorphosis only by injecting 2-week-old frogs with 10 ng PCB-126/g (Trial III). The resulting body burden (3.4 ng/g) was similar to that of frogs in Trial I, but we no longer detected suppression of KLH-specific IgY or hemolytic activity. These results suggest life-stage-specific immune responses; however, because we administered PCB-126 differently between trials, it is premature to conclude that these differences are intrinsically life stage dependent, and further study is warranted. Regardless, our study demonstrated a long-lasting effect of larval PCB-126 exposure that persisted through metamorphosis and suppressed frog immunity. Environ Toxicol Chem 2022;41:81-94. © 2021 SETAC.
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Affiliation(s)
- Tawnya L Cary
- Department of Zoology, University of Wisconsin, Madison, Wisconsin, USA
- Department of Biology, Beloit College, Beloit, Wisconsin, USA
| | - William H Karasov
- Department of Zoology, University of Wisconsin, Madison, Wisconsin, USA
- Department of Forest & Wildlife Ecology, University of Wisconsin, Madison, Wisconsin, USA
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Kim JH, Hwang S, Park SI, Jo SH. Effects of 3,3’,4,4’,5-pentachlorobiphenyl on human Kv1.3 and Kv1.5 channels. ACTA ACUST UNITED AC 2019. [DOI: 10.11620/ijob.2019.44.3.115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Knutsen HK, Alexander J, Barregård L, Bignami M, Brüschweiler B, Ceccatelli S, Cottrill B, Dinovi M, Edler L, Grasl-Kraupp B, Hogstrand C, Nebbia CS, Oswald IP, Petersen A, Rose M, Roudot AC, Schwerdtle T, Vleminckx C, Vollmer G, Wallace H, Fürst P, Håkansson H, Halldorsson T, Lundebye AK, Pohjanvirta R, Rylander L, Smith A, van Loveren H, Waalkens-Berendsen I, Zeilmaker M, Binaglia M, Gómez Ruiz JÁ, Horváth Z, Christoph E, Ciccolallo L, Ramos Bordajandi L, Steinkellner H, Hoogenboom LR. Risk for animal and human health related to the presence of dioxins and dioxin-like PCBs in feed and food. EFSA J 2018; 16:e05333. [PMID: 32625737 PMCID: PMC7009407 DOI: 10.2903/j.efsa.2018.5333] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The European Commission asked EFSA for a scientific opinion on the risks for animal and human health related to the presence of dioxins (PCDD/Fs) and DL-PCBs in feed and food. The data from experimental animal and epidemiological studies were reviewed and it was decided to base the human risk assessment on effects observed in humans and to use animal data as supportive evidence. The critical effect was on semen quality, following pre- and postnatal exposure. The critical study showed a NOAEL of 7.0 pg WHO2005-TEQ/g fat in blood sampled at age 9 years based on PCDD/F-TEQs. No association was observed when including DL-PCB-TEQs. Using toxicokinetic modelling and taking into account the exposure from breastfeeding and a twofold higher intake during childhood, it was estimated that daily exposure in adolescents and adults should be below 0.25 pg TEQ/kg bw/day. The CONTAM Panel established a TWI of 2 pg TEQ/kg bw/week. With occurrence and consumption data from European countries, the mean and P95 intake of total TEQ by Adolescents, Adults, Elderly and Very Elderly varied between, respectively, 2.1 to 10.5, and 5.3 to 30.4 pg TEQ/kg bw/week, implying a considerable exceedance of the TWI. Toddlers and Other Children showed a higher exposure than older age groups, but this was accounted for when deriving the TWI. Exposure to PCDD/F-TEQ only was on average 2.4- and 2.7-fold lower for mean and P95 exposure than for total TEQ. PCDD/Fs and DL-PCBs are transferred to milk and eggs, and accumulate in fatty tissues and liver. Transfer rates and bioconcentration factors were identified for various species. The CONTAM Panel was not able to identify reference values in most farm and companion animals with the exception of NOAELs for mink, chicken and some fish species. The estimated exposure from feed for these species does not imply a risk.
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Eftekhari A, Dizaj SM, Chodari L, Sunar S, Hasanzadeh A, Ahmadian E, Hasanzadeh M. The promising future of nano-antioxidant therapy against environmental pollutants induced-toxicities. Biomed Pharmacother 2018; 103:1018-1027. [DOI: 10.1016/j.biopha.2018.04.126] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 04/13/2018] [Accepted: 04/17/2018] [Indexed: 12/24/2022] Open
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Cao J, Xu X, Hylkema MN, Zeng EY, Sly PD, Suk WA, Bergman Å, Huo X. Early-life Exposure to Widespread Environmental Toxicants and Health Risk: A Focus on the Immune and Respiratory Systems. Ann Glob Health 2016; 82:119-31. [PMID: 27325070 DOI: 10.1016/j.aogh.2016.01.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Evidence has accumulated that exposure to widespread environmental toxicants, such as heavy metals, persistent organic pollutants, and tobacco smoke adversely affect fetal development and organ maturation, even after birth. The developing immune and respiratory systems are more sensitive to environmental toxicants due to their long-term physical development, starting from the early embryonic stage and persisting into early postnatal life, which requires complex signaling pathways that control proliferation and differentiation of highly heterogeneous cell types. In this review, we summarize the effect of early-life exposure to several widespread environmental toxicants on immune and lung development before and after birth, including the effects on immune cell counts, baseline characteristics of cell-mediated and humoral immunity, and alteration of lung structure and function in offspring. We also review evidence supporting the association between early-life exposure to environmental toxicants and risk for immune-related diseases and lung dysfunction in offspring in later life.
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Affiliation(s)
- Junjun Cao
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, Shantou, China; Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; GRIAC Research Institute, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Xijin Xu
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, Shantou, China.
| | - Machteld N Hylkema
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; GRIAC Research Institute, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Eddy Y Zeng
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, China
| | - Peter D Sly
- Children's Health and Environment Program, Child Health Research Centre, The University of Queensland, Queensland, Australia
| | - William A Suk
- Hazardous Substances Research Branch, Superfund Research Program, National Institute for Environmental Health Sciences, National Institutes of Health, Bethesda, MD
| | - Åke Bergman
- Swedish Toxicology Sciences Research Center (Swetox), Södertälje, Sweden
| | - Xia Huo
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, Shantou, China; School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, China
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Tian J, Feng Y, Fu H, Xie HQ, Jiang JX, Zhao B. The Aryl Hydrocarbon Receptor: A Key Bridging Molecule of External and Internal Chemical Signals. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:9518-31. [PMID: 26079192 PMCID: PMC4696777 DOI: 10.1021/acs.est.5b00385] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The aryl hydrocarbon receptor (AhR) is a highly evolutionary conserved, ligand-activated transcription factor that is best known to mediate the toxicities of dioxins and dioxin-like compounds. Phenotype of AhR-null mice, together with the recent discovery of a variety of endogenous and plant-derived ligands, point to the integral roles of AhR in normal cell physiology, in addition to its roles in sensing the environmental chemicals. Here, we summarize the current knowledge about AhR signaling pathways, its ligands and AhR-mediated effects on cell specialization, host defense and detoxification. AhR-mediated health effects particularly in liver, immune, and nervous systems, as well as in tumorgenesis are discussed. Dioxin-initiated embryotoxicity and immunosuppressive effects in fish and birds are reviewed. Recent data demonstrate that AhR is a convergence point of multiple signaling pathways that inform the cell of its external and internal environments. As such, AhR pathway is a promising potential target for therapeutics targeting nervous, liver, and autoimmune diseases through AhR ligand-mediated interventions and other perturbations of AhR signaling. Additionally, using available laboratory data obtained on animal models, AhR-centered adverse outcome pathway analysis is useful in reexamining known and potential adverse outcomes of specific or mixed compounds on wildlife.
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Affiliation(s)
- Jijing Tian
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Department of Internal Medicine, Gastroenterology and Hepatology, University of California, Davis, Sacramento, California 95817, United States
| | - Yu Feng
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Hualing Fu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Heidi Qunhui Xie
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Joy Xiaosong Jiang
- Department of Internal Medicine, Gastroenterology and Hepatology, University of California, Davis, Sacramento, California 95817, United States
- Corresponding Authors: (J.X.J) Phone: 1-916-7340329; fax: 1-916-7347908; . (B.Z.) Phone: 86-010-62842867; fax: 86-010-62842867;
| | - Bin Zhao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Corresponding Authors: (J.X.J) Phone: 1-916-7340329; fax: 1-916-7347908; . (B.Z.) Phone: 86-010-62842867; fax: 86-010-62842867;
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Su H, Wu F, Zhang R, Zhao X, Mu Y, Feng C, Giesy JP. Toxicity reference values for protecting aquatic birds in China from the effects of polychlorinated biphenyls. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2014; 230:59-82. [PMID: 24609518 DOI: 10.1007/978-3-319-04411-8_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
PCBs are typical of persistent, bioaccumulative and toxic compounds (PBTs) that are widely distributed in the environment and can biomagnify through aquatic food webs, because of their stability and lipophilic properties. Fish-eating birds are top predators in the aquatic food chain and may suffer adverse effects from exposure to PCB concentrations. In this review, we address the toxicity of PCBs to birds and have derived tissue residue guidelines (TRGs) and toxic reference values (TRVs) for PCBs for protecting birds in China. In deriving these protective indices, we utilized available data and three approaches, to wit: species sensitivity distribution (SSD), critical study approach (CSA) and toxicity percentile rank method (TPRM). The TRGs and TRVs arrived at by using these methods were 42.3, I 0. 7, 4.3 pg TEQs/g diet wm and 16.7, 15.5, and 5.5 pg TEQs/g tissue wm for the CSA SSD and TPRM approaches, respectively. These criteria values were analyzed and compared with those derived by others. The following TRG and TRY, derived by SSD, were recommended as avian criteria for protecting avian species in China: 10.7 pg TEQs/g diet wm and 15.5 pg TEQs/g tissue wm, respectively. The hazard of PCBs to birds was assessed by comparing the TRVs and TRGs derived in this study with actual PCB concentrations detected in birds or fish. The criteria values derived in this study can be used to evaluate the risk of PCBs to birds in China, and to provide indices that are more reasonable for protecting Chinese avian species. However, several sources of uncertainty exists when deriving TRGs and TRVs for the PCBs in birds, such as lack of adequate toxicity data for birds and need to use uncertainty factors. Clearly, relevant work on PCBs and birds in China are needed in the future. For example, PCB toxicity data for resident avian species in China are needed. In addition, studies are needed on the actual PCB levels in birds and fish in China. Such information is needed to serve as a more firm foundation for future risk assessments.
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Affiliation(s)
- Hailei Su
- College of Water Sciences, Beijing Normal University, Beijing, 100875, China
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Grasman KA, Echols KR, May TM, Peterman PH, Gale RW, Orazio CE. Immunological and reproductive health assessment in herring gulls and black-crowned night herons in the Hudson-Raritan Estuary. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2013; 32:548-561. [PMID: 23212976 DOI: 10.1002/etc.2089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Revised: 11/17/2011] [Accepted: 09/26/2012] [Indexed: 06/01/2023]
Abstract
Previous studies have shown inexplicable declines in breeding waterbirds within western New York/New Jersey Harbor between 1996 and 2002 and elevated polychlorinated dibenzo-p-dioxins and polychlorinated biphenyls (PCBs) in double-crested cormorant (Phalacrocorax auritus) eggs. The present study assessed associations between immune function, prefledgling survival, and selected organochlorine compounds and metals in herring gulls (Larus argentatus) and black-crowned night herons (Nycticorax nycticorax) in lower New York Harbor during 2003. In pipping gull embryos, lymphoid cells were counted in the thymus and bursa of Fabricius (sites of T and B lymphocyte maturation, respectively). The phytohemagglutinin (PHA) skin response assessed T cell function in gull and heron chicks. Lymphocyte proliferation was measured in vitro in adult and prefledgling gulls. Reference data came from the Great Lakes and Bay of Fundy. Survival of prefledgling gulls was poor, with only 0.68 and 0.5 chicks per nest surviving to three and four weeks after hatch, respectively. Developing lymphoid cells were reduced 51% in the thymus and 42% in the bursa of gull embryos from New York Harbor. In vitro lymphocyte assays demonstrated reduced spontaneous proliferation, reduced T cell mitogen-induced proliferation, and increased B cell mitogen-induced proliferation in gull chicks from New York Harbor. The PHA skin response was suppressed 70 to 80% in gull and heron chicks. Strong negative correlations (r = -0.95 to -0.98) between the PHA response and dioxins and PCBs in gull livers was strong evidence suggesting that these chemicals contribute significantly to immunosuppression in New York Harbor waterbirds.
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Affiliation(s)
- Keith A Grasman
- Department of Biology, Calvin College, Grand Rapids, Michigan, USA.
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Yap X, Deaville R, Perkins MW, Penrose R, Law RJ, Jepson PD. Investigating links between polychlorinated biphenyl (PCB) exposure and thymic involution and thymic cysts in harbour porpoises (Phocoena phocoena). MARINE POLLUTION BULLETIN 2012; 64:2168-2176. [PMID: 22917837 DOI: 10.1016/j.marpolbul.2012.07.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 07/17/2012] [Accepted: 07/19/2012] [Indexed: 06/01/2023]
Abstract
The associations between polychlorinated biphenyls (PCBs) exposure and involution of lymphoid tissue and development of epithelial-lined cysts in the thymus of UK-stranded harbour porpoises (Phocoena phocoena) (n=170) were tested. Percentage of thymic lymphoid tissue (%TLT) was histologically quantified. Multiple regression analyses (n=169) demonstrated significant positive correlation between %TLT and nutritional status (p<0.001) and significant negative association between %TLT and onset of sexual maturity (p<0.001). However, in a subgroup of porpoises with total PCB levels above a proposed threshold of toxicity (>17mg/kg lipid weight) (n=109), the negative association between %TLT (as dependent variable) and summed blubber concentrations of 25 chlorobiphenyl congeners (∑25CBs) remained significant (p<0.01) along with nutritional status (p<0.001) and onset of sexual maturity (p<0.001). These results suggest PCB-induced immuno suppression may be occurring in harbour porpoises in UK waters but only at concentrations that exceed proposed toxicity thresholds for marine mammals. In contrast, development of thymic cysts appears predominantly age-related.
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Affiliation(s)
- Xinli Yap
- Institute of Zoology, Zoological Society of London, Regent's Park, NW1 4RY London, UK
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Kashiwagi K, Furuno N, Kitamura S, Ohta S, Sugihara K, Utsumi K, Hanada H, Taniguchi K, Suzuki KI, Kashiwagi A. Disruption of Thyroid Hormone Function by Environmental Pollutants. ACTA ACUST UNITED AC 2009. [DOI: 10.1248/jhs.55.147] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Keiko Kashiwagi
- Institute for Amphibian Biology, Graduate School of Science, Hiroshima University
| | - Nobuaki Furuno
- Institute for Amphibian Biology, Graduate School of Science, Hiroshima University
| | | | - Shigeru Ohta
- Graduate School of Biomedical Sciences, Hiroshima University
| | - Kazumi Sugihara
- Graduate School of Biomedical Sciences, Hiroshima University
| | - Kozo Utsumi
- Department of Cytology and Histology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Hideki Hanada
- Institute for Amphibian Biology, Graduate School of Science, Hiroshima University
| | | | - Ken-ichi Suzuki
- Laboratory of Developmental Biology, Department of Biological Science, Graduate School of Science, Hiroshima University
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Franco R, Sánchez-Olea R, Reyes-Reyes EM, Panayiotidis MI. Environmental toxicity, oxidative stress and apoptosis: ménage à trois. Mutat Res 2008; 674:3-22. [PMID: 19114126 DOI: 10.1016/j.mrgentox.2008.11.012] [Citation(s) in RCA: 345] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2008] [Accepted: 11/27/2008] [Indexed: 12/21/2022]
Abstract
Apoptosis is an evolutionary conserved homeostatic process involved in distinct physiological processes including organ and tissue morphogenesis, development and senescence. Its deregulation is also known to participate in the etiology of several human diseases including cancer, neurodegenerative and autoimmune disorders. Environmental stressors (cytotoxic agents, pollutants or toxicants) are well known to induce apoptotic cell death and to contribute to a variety of pathological conditions. Oxidative stress seems to be the central element in the regulation of the apoptotic pathways triggered by environmental stressors. In this work, we review the established mechanisms by which oxidative stress and environmental stressors regulate the apoptotic machinery with the aim to underscore the relevance of apoptosis as a component in environmental toxicity and human disease progression.
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Affiliation(s)
- Rodrigo Franco
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, P. O. Box 12233, 111. T.W. Alexander Drive, Research Triangle Park, NC 27709, United States.
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Kashiwagi A, Utsumi K, Kashiwagi K, Ohta S, Sugihara K, Hanada H, Kitamura S. Effects of Endocrine Disrupting Chemicals on Amphibian Metamorphosis and Mitochondrial Membrane Permeability Transition. ACTA ACUST UNITED AC 2008. [DOI: 10.1248/jhs.54.273] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Akihiko Kashiwagi
- Institute for Amphibian Biology, Graduate School of Science, Hiroshima University
| | - Kozo Utsumi
- Department of Cytology and Histology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
| | - Keiko Kashiwagi
- Institute for Amphibian Biology, Graduate School of Science, Hiroshima University
| | - Shigeru Ohta
- Graduate School of Biomedical Sciences, Hiroshima University
| | - Kazumi Sugihara
- Graduate School of Biomedical Sciences, Hiroshima University
| | - Hideki Hanada
- Institute for Amphibian Biology, Graduate School of Science, Hiroshima University
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Park HY, Hertz-Picciotto I, Petrik J, Palkovicova L, Kocan A, Trnovec T. Prenatal PCB exposure and thymus size at birth in neonates in Eastern Slovakia. ENVIRONMENTAL HEALTH PERSPECTIVES 2008; 116:104-9. [PMID: 18197307 PMCID: PMC2199273 DOI: 10.1289/ehp.9769] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2006] [Accepted: 08/14/2007] [Indexed: 05/02/2023]
Abstract
BACKGROUND Polychlorinated biphenyls (PCBs) are ubiquitous environmental toxicants, for which animal studies demonstrate immunotoxic effects, including thymic atrophy and suppressed immune responses; human investigations of similar end points are sparse. The thymus is essential for the differentiation and maturation of T-cell lymphocytes. OBJECTIVES The objective of this study was to examine the association between prenatal PCB exposures and estimated thymus volume in infants from eastern Slovakia, a region where PCBs were produced until 1984. METHODS Mothers were enrolled at delivery, and maternal blood samples were collected for analysis of 15 PCB congeners, p,p'-DDT [1,1,1-trichloro-2,2'-bis(p-chlorophenyl)ethane], and p,p'-DDE [1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene]. Each mother was interviewed to obtain information on sociodemographic characteristics, past pregnancies, occupational history, medication history, and living environment. Neonatal thymus volume was estimated using ultrasound measurements on the third or fourth day after birth. Thymic index was calculated on 982 newborns from mothers with PCB measurements. We developed a predictive model of the natural log of the thymic index using multiple linear regression with covariates selected from the bivariate analyses. RESULTS Prenatal PCB exposure was associated with a smaller thymic index at birth [beta= -36 (natural log-transformed; nanograms per gram lipids); p = 0.047]. District of residence and delivery also predicted thymic index. Male sex, later gestational age, larger birth weight z-score, and Roma ethnicity were associated with a larger thymic index, whereas respiratory illness was associated with a lower thymic index. CONCLUSIONS This study provides the first evidence to date that PCB exposure in neonates is associated with a smaller thymic volume, suggesting possible impaired immunologic development.
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Affiliation(s)
- Hye-Youn Park
- Division of Epidemiology, Department of Public Health Sciences, School of Medicine, University of California, Davis, California, USA
| | - Irva Hertz-Picciotto
- Division of Epidemiology, Department of Public Health Sciences, School of Medicine, University of California, Davis, California, USA
- Address correspondence to I. Hertz-Picciotto, University of California, TB168, One Shields Ave., UC Davis, CA 95616. Telephone: (530) 752-3025. Fax: (530) 752-3230. E-mail:
| | - Jan Petrik
- Department of Toxic Organic Pollutants and
| | - Lubica Palkovicova
- Department of Environmental Medicine, Slovak Medical University, Bratislava, Slovakia
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Lavoie ET, Wiley F, Grasman KA, Tillitt DE, Sikarskie JG, Bowerman WW. Effect of In Ovo exposure to an organochlorine mixture extracted from double crested cormorant eggs (Phalacrocorax auritus) and PCB 126 on immune function of juvenile chickens. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2007; 53:655-61. [PMID: 17882474 DOI: 10.1007/s00244-006-0150-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2006] [Accepted: 12/17/2006] [Indexed: 05/17/2023]
Abstract
Organochlorine (OC) contaminants including polychlorinated biphenyls (PCBs) and p, p'-dichlorodiphenyldichloroethylene (DDE) have been associated with immune modulation in wild fish-eating birds from the Great Lakes. The objective of this study was to evaluate the immune function of juvenile chickens after in ovo exposure to PCB 126 or an environmentally relevant OC mixture extracted from eggs of double crested cormorants (Phalacrocorax auritus) from Green Bay, Lake Michigan, USA. Fertile white leghorn chicken (Gallus domesticus) eggs were injected before incubation with 0.55-1.79 ng TCDD equivalents (TEQ)/egg PCB 126 and 1.2-4.9 ng TEQs/egg of cormorant egg extract into the air cell in two separate experiments. After hatching, the immune function was tested using in vivo phytohemagglutinin (PHA) skin response in 11-day-old chicks, antibody titers to immunization with sheep red blood cells (SRBC) in 28-day-old chicks, and, at necropsy, thymus and bursal mass and cellularity. PCB 126 decreased antibody titers at all doses and decreased the thymus and bursa index but not cellularity at 1.79 ng TEQ/egg. The cormorant egg extract caused no significant alterations in immune function even though it has been demonstrated as immunotoxic in chicken embryos. However, twofold to threefold increases in total anti-SRBC titers in 28-day-old chicks exposed to 1.2 or 2.4 ng TEQ/egg of cormorant extract were similar to elevations in anti-SRBC titer observed in Caspian tern (Sterna caspia) chicks from a highly OC-contaminated site in Saginaw Bay, Lake Huron. Posthatch exposure to OC through fish consumption in addition to in ovo OC exposure might be associated with the immune modulation reported in wild birds. Chicks in this study might have begun to compensate for embryonic immunotoxicity by the ages at which we studied them.
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Affiliation(s)
- E T Lavoie
- Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20742, USA.
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Lavoie ET, Grasman KA. Effects of in ovo exposure to PCBs 126 and 77 on mortality, deformities and post-hatch immune function in chickens. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2007; 70:547-58. [PMID: 17365608 DOI: 10.1080/15287390600882226] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
In laboratory experiments, planar PCBs produce immune organ atrophy in chicken embryos. To study the immunotoxic effects of PCBs in birds, the coplanar congeners 3,3',4,4',5-pentachlorobiphenyl (PCB 126) and 3,3',4,4'-tetrachlorobiphenyl (PCB 77) were injected into the air cell of fertile white leghorn chicken eggs before incubation at doses of 0.25 and 0.5 ng/g egg PCB 126 and 0.64 ng/g egg PCB 77. Mortality and deformities were assessed during incubation of the eggs, and immune function was analyzed post-hatch using phytohemagglutinin (PHA) skin test for T-cell mediated immunity, antibody titers to sheep red blood cells (SRBC), mitogenesis of peripheral blood lymphocytes, and immune organ mass and cellularity. Exposure to 0.25 ng/g PCB 126 elevated mortality (61% and 69%) and deformities (31% and 32%), three or more times higher than controls. Two-fold suppression of antibody titers was observed in 28 day old chicks exposed to PCB 126 or PCB 77. No consistent alterations in PHA skin response or lymphocyte proliferation were observed. In 14 day old chicks in experiment two, PCB 126 decreased thymus and bursa cellularity by 33% and 35%, respectively. Immune organ atrophy was transient, recovering to control levels by 42 days of age. These experiments demonstrate that PCB 126 and 77 suppress antibody responses in juvenile chickens following an in ovo PCB exposure. Results reinforce the need for measuring multiple immune endpoints to detect immunotoxicity.
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Affiliation(s)
- E T Lavoie
- Department of Animal and Avian Sciences, University of Maryland, Building 142, College Park, Maryland 20742, USA.
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Fujita H, Okimura Y, Utsumi T, Kitamura S, Kuroki H, Otsuki T, Sasaki J, Kashiwagi A, Utsumi K. 4-Hydroxy-3,5,3',4'-Tetrachlorobiphenyl Induced Membrane Permeability Transition in Isolated Rat Liver Mitochondria. J Clin Biochem Nutr 2006. [DOI: 10.3164/jcbn.38.167] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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