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Wei Y, Zhou G, Lv G, Wei W, Shera L, Lin H, Chen J, Kang D. PCB169 exposure aggravated the development of non-alcoholic fatty liver in high-fat diet-induced male C57BL/6 mice. Front Nutr 2024; 11:1350146. [PMID: 38779445 PMCID: PMC11110572 DOI: 10.3389/fnut.2024.1350146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Accepted: 04/22/2024] [Indexed: 05/25/2024] Open
Abstract
Polychlorinated biphenyls (PCBs) are lipophilic environmental toxicants. Epidemiological studies have established a link between PCBs and both metabolic syndrome and nonalcoholic fatty liver disease (NAFLD). Multiple studies have reported that exposure to both PCB156 and PCB126 among the 12 dioxin-like PCBs leads to the development of NAFLD. However, studies to elucidate whether PCB169 induces the development of NAFLD by constructing in vivo models have not been reported. Therefore, we evaluated the effects of exposure to PCB169 (5 mg/kg-bw) on hepatic lipid metabolism in C57BL/6 mice from control diet and high-fat diet cohorts. The results showed that PCB169 exposure reduced body weight and intraperitoneal fat mass in mice on the control diet, but the liver lipid levels were significantly increased, exacerbating NAFLD in mice on a high-fat diet. Through transcriptomics studies, it was found that PCB169 exposure induced significant up-regulation of Pparγ, Fasn, and Aacs genes involved in hepatic lipogenesis, as well as remarkable up-regulation of Hmgcr, Lss, and Sqle genes involved in cholesterol synthesis. Additionally, there was notable down-regulation of Pparα and Cpt1 genes involved in lipid β-oxidation, leading to abnormal lipid accumulation in the liver. In addition, we found that PCB169 exposure significantly activated the Arachidonic acid metabolism, PPAR signaling pathway, Metabolism of xenobiotics by cytochrome P450, and Retinol metabolism pathways, and so on. Our study suggests that PCB169 can modify gene expression related to lipid metabolism, augument lipid accumulation in the liver, and further contribute to the development of NAFLD, thereby revealing the detrimental effects associated with PCB exposure on animal growth and metabolism.
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Affiliation(s)
| | | | | | | | | | | | - Jinjun Chen
- Department of Veterinary Medicine, College of Coastal Agriculture, Guangdong Ocean University, Zhanjiang, Guangdong, China
| | - Danju Kang
- Department of Veterinary Medicine, College of Coastal Agriculture, Guangdong Ocean University, Zhanjiang, Guangdong, China
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Bresson SE, Isom S, Jensen ET, Huber S, Oulhote Y, Rigdon J, Lovato J, Liese AD, Pihoker C, Dabelea D, Ehrlich S, Ruzzin J. Associations between persistent organic pollutants and type 1 diabetes in youth. ENVIRONMENT INTERNATIONAL 2022; 163:107175. [PMID: 35303528 DOI: 10.1016/j.envint.2022.107175] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 02/08/2022] [Accepted: 03/07/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Diabetes affects millions of people worldwide with a continued increase in incidence occurring within the pediatric population. The potential contribution of persistent organic pollutants (POPs) to diabetes in youth remains poorly known, especially regarding type 1 diabetes (T1D), generally the most prevalent form of diabetes in youth. OBJECTIVES We investigated the associations between POPs and T1D in youth and studied the impacts of POPs on pancreatic β-cell function and viability in vitro. METHODS We used data and plasma samples from the SEARCH for Diabetes in Youth Case Control Study (SEARCH-CC). Participants were categorized as Controls, T1D with normal insulin sensitivity (T1D/IS), and T1D with insulin resistance (T1D/IR). We assessed plasma concentrations of polychlorinated biphenyls (PCBs) and organochlorine pesticides and estimated the odds of T1D through multivariable logistic regression. In addition, we performed in vitro experiments with the INS-1E pancreatic β-cells. Cells were treated with PCB-153 or p,p'-DDE at environmentally relevant doses. We measured insulin production and secretion and assessed the mRNA expression of key regulators involved in insulin synthesis (Ins1, Ins2, Pdx1, Mafa, Pcsk1/3, and Pcsk2), glucose sensing (Slc2a2 and Gck), and insulin secretion (Abcc8, Kcnj11, Cacna1d, Cacna1b, Stx1a, Snap25, and Sytl4). Finally, we assessed the effects of PCB-153 and p,p'-DDE on β-cell viability. RESULTS Among 442 youths, 112 were controls, 182 were classified with T1D/IS and 148 with T1D/IR. The odds ratios (OR) of T1D/IS versus controls were statistically significant for p,p'-DDE (OR 2.0, 95% confidence interval (CI) 1.0, 3.8 and 2.4, 95% CI 1.2, 5.0 for 2nd and 3rd tertiles, respectively), trans-nonachlor (OR 2.5, 95% CI 1.3, 5.0 and OR 2.3, 95% CI 1.1, 5.1 for 2nd and 3rd tertiles, respectively), and PCB-153 (OR 2.3, 95% CI 1.1, 4.6 for 3rd tertile). However, these associations were not observed in participants with T1D/IR. At an experimental level, treatment with p,p'-DDE or PCB-153, at concentrations ranging from 1 × 10-15 M to 5 × 10-6 M, impaired the ability of pancreatic β-cells to produce and secrete insulin in response to glucose. These failures were paralleled by impaired Ins1 and Ins2 mRNA expression. In addition, among different targeted genes, PCB-153 significantly reduced Slc2a2 and Gck mRNA expression whereas p,p'-DDE mainly affected Abcc8 and Kcnj11. While treatment with PCB-153 or p,p'-DDE for 2 days did not affect β-cell viability, longer treatment progressively killed the β-cells. CONCLUSION These results support a potential role of POPs in T1D etiology and demonstrate a high sensitivity of pancreatic β-cells to POPs.
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Affiliation(s)
- Sophie E Bresson
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Scott Isom
- Wake Forest School of Medicine, Winston-Salem, NC, USA
| | | | - Sandra Huber
- Department of Laboratory Medicine, University Hospital of North Norway, Tromsø, Norway
| | - Youssef Oulhote
- Department of Biostatistics and Epidemiology, School of Public Health and Health Sciences, University of Massachusetts, Amherst, MA, USA
| | - Joseph Rigdon
- Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - James Lovato
- Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Angela D Liese
- Department of Epidemiology and Biostatistics, Arnold School of Public Health, SC, USA
| | - Catherine Pihoker
- Department of Pediatrics, University of Washington, Seattle, WA, USA
| | - Dana Dabelea
- Lifecourse Epidemiology of Adiposity and Diabetes (LEAD) Center and Department of Epidemiology, Colorado School of Public Health, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Shelley Ehrlich
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical center, Cincinnati, OH, USA; Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Jérôme Ruzzin
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Oslo, Norway.
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Padmanabhan V, Song W, Puttabyatappa M. Praegnatio Perturbatio-Impact of Endocrine-Disrupting Chemicals. Endocr Rev 2021; 42:295-353. [PMID: 33388776 PMCID: PMC8152448 DOI: 10.1210/endrev/bnaa035] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Indexed: 02/07/2023]
Abstract
The burden of adverse pregnancy outcomes such as preterm birth and low birth weight is considerable across the world. Several risk factors for adverse pregnancy outcomes have been identified. One risk factor for adverse pregnancy outcomes receiving considerable attention in recent years is gestational exposure to endocrine-disrupting chemicals (EDCs). Humans are exposed to a multitude of environmental chemicals with known endocrine-disrupting properties, and evidence suggests exposure to these EDCs have the potential to disrupt the maternal-fetal environment culminating in adverse pregnancy and birth outcomes. This review addresses the impact of maternal and fetal exposure to environmental EDCs of natural and man-made chemicals in disrupting the maternal-fetal milieu in human leading to adverse pregnancy and birth outcomes-a risk factor for adult-onset noncommunicable diseases, the role lifestyle and environmental factors play in mitigating or amplifying the effects of EDCs, the underlying mechanisms and mediators involved, and the research directions on which to focus future investigations to help alleviate the adverse effects of EDC exposure.
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Affiliation(s)
| | - Wenhui Song
- Department of Pediatrics, University of Michigan, Ann Arbor, Michigan, USA
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Polychlorinated biphenyls and risk of hepatocellular carcinoma in the population living in a highly polluted area in Italy. Sci Rep 2021; 11:3064. [PMID: 33542320 PMCID: PMC7862237 DOI: 10.1038/s41598-021-82657-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 01/08/2021] [Indexed: 01/23/2023] Open
Abstract
Polychlorinated biphenyls (PCBs) are human carcinogens, based on sufficient evidence for melanoma and limited evidence for non-Hodgkin lymphoma and breast cancer. Few data are available for liver cancer, although PCBs cause it in rats and determined liver damage in poisoned people. We investigated the association between PCB serum levels and hepatocellular carcinoma (HCC) with a case–control study in a PCB-polluted area in North Italy. We enrolled prospectively 102 HCC incident cases and 102 age and gender-matched hospital controls. Serum concentrations of 33 PCB congeners were determined by a gas chromatograph coupled to mass spectrometry. Of 102 HCC cases, 62 who had lost < 3 kg of body weight in past 3 years were included in the analysis (67.7% males, mean age 68 years). The odds ratio (OR) for HCC for 3rd compared to 1st tertile of PCB distribution was 1.76 (95% confidence interval 0.62–5.03) for total PCB, adjusting for socio-demographic variables and risk factors for HCC by logistic regression. For most PCB congeners, ORs > 1.5 or 2 were found, although the 95% CIs included the null value for almost all of them. This preliminary study suggests that PCBs might play a role in HCC development.
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Peng-Li D, Sørensen TA, Li Y, He Q. Systematically lower structural brain connectivity in individuals with elevated food addiction symptoms. Appetite 2020; 155:104850. [DOI: 10.1016/j.appet.2020.104850] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/30/2020] [Accepted: 08/18/2020] [Indexed: 12/19/2022]
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Calaf GM, Ponce-Cusi R, Aguayo F, Muñoz JP, Bleak TC. Endocrine disruptors from the environment affecting breast cancer. Oncol Lett 2020; 20:19-32. [PMID: 32565930 PMCID: PMC7286136 DOI: 10.3892/ol.2020.11566] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 02/10/2020] [Indexed: 12/12/2022] Open
Abstract
Evaluation of carcinogenic substances from the environment is a challenge for scientists. Recently, a novel approach based on 10 key characteristics of human carcinogens classified by the International Agency for Research on Cancer (IARC) has emerged. Carcinogenesis depends on different mechanisms and factors, including genetic, infectious (bacteria, viruses) and environmental (chemicals) factors. Endocrine disruptors are exogenous chemicals that can interfere and impair the function of the endocrine system due to their interaction with estrogen receptors or their estrogen signaling pathways inducing adverse effects in the normal mammary development, originating cancer. They are heterogeneous chemicals and include numerous synthetic substances used worldwide in agriculture, industry and consumer products. The most common are plasticizers, such as bisphenol A (BPA), pesticides, such as dichlorodiphenyltrichloroethane, and polychlorinated biphenyls (PCBs). Xenoestrogens appear to serve an important role in the increased incidence of breast cancer in the United States and numerous other countries. Several studies have demonstrated the role of organochlorine xenoestrogens in breast cancer. Therefore, the overall cumulative exposure of women to estrogens results in an increased risk for this type of cancer. Factors like lifestyle and diet also serve a role in the increased incidence of this disease. The aim of the present study was to analyze these chemical compounds based on the key characteristics given by the IARC, with a special focus on breast cancer, to establish whether these compounds are carcinogens, and to create a model for future analysis of other endocrine disruptors.
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Affiliation(s)
- Gloria M Calaf
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, Chile
- Center for Radiological Research, Columbia University Medical Center, New York, NY 10032, USA
| | - Richard Ponce-Cusi
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, Chile
| | - Francisco Aguayo
- Programa de Virología, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago 8380000, Chile
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile, Santiago 8380000, Chile
| | - Juan P Muñoz
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, Chile
| | - Tammy C Bleak
- Instituto de Alta Investigación, Universidad de Tarapacá, Arica 1000000, Chile
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Lee YM, Lee DH. Can habitual exercise really increase serum concentrations of persistent organic pollutants? ENVIRONMENT INTERNATIONAL 2020; 140:105615. [PMID: 32183987 DOI: 10.1016/j.envint.2020.105615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Affiliation(s)
- Yu-Mi Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Duk-Hee Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea; BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, Kyungpook National University, Republic of Korea.
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Lee D, Jacobs DR, Lind L, Lind PM. Lipophilic Environmental Chemical Mixtures Released During Weight‐Loss: The Need to Consider Dynamics. Bioessays 2020; 42:e1900237. [DOI: 10.1002/bies.201900237] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 03/06/2020] [Indexed: 12/25/2022]
Affiliation(s)
- Duk‐Hee Lee
- Department of Preventive MedicineSchool of MedicineKyungpook National University Daegu 41944 Korea
| | - David R Jacobs
- Division of Epidemiology and Community HealthSchool of Public HealthUniversity of Minnesota Minneapolis Minnesota 55454 USA
| | - Lars Lind
- Department of Medical SciencesCardiovascular EpidemiologyUppsala University Uppsala 75237 Sweden
| | - P. Monica Lind
- Department of Medical SciencesOccupational and Environmental MedicineUppsala University Uppsala 75185 Sweden
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Narduzzi S, Fantini F, Blasetti F, Rantakokko P, Kiviranta H, Forastiere F, Michelozzi P, Porta D. Predictors of Beta-Hexachlorocyclohexane blood levels among people living close to a chemical plant and an illegal dumping site. Environ Health 2020; 19:9. [PMID: 31969154 PMCID: PMC6977344 DOI: 10.1186/s12940-020-0562-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Accepted: 01/07/2020] [Indexed: 05/04/2023]
Abstract
BACKGROUND Hexachlorocyclohexane is a synthetic chemical with several isomers, including β-Hexachlorocyclohexane (β-HCH). In 2005, a large contamination of crude milk from some bovine farms along the Sacco River (Central Italy) was detected; it was related to the illegal disposal of large quantities of processing waste by a chemical industry of the area. A biomonitoring study, conducted in 2007 on a sample of the residing population, found high values of β-HCH in people living close to the river. These results led to the establishment of a clinical and epidemiological surveillance program on all the exposed population. The aim of the study was to evaluate the determinants of β-HCH blood levels in people living within 1 Km of the Sacco River, focusing on the role of specific foods, body mass index and risk factors not yet identified. METHODS The program involved all people living within 1 km of the river. A descriptive analysis of β-HCH blood levels was done in relation to the potential determinants including specific foods. Regression analysis was used to study the association between potential determinants and (natural log) β-HCH haematic concentration. The results were expressed as geometric mean ratios (GMR). To take into account similarities within the families we adjusted for family clustering. RESULTS A total of 602 subjects (87.2%) agreed to participate in the surveillance. The β-HCH geometric mean serum concentration was 72 ng/g lipid. The regression analysis showed that being female (GMR: 1.32, 95%CI: 1.14-1.53), elderly (GMR> 70yy: 10.04, 95%CI: 6.65-15.15), obese (GMR: 1.63, 95%CI: 1.28-2.08), eating food of local/own production (GMR 1.47, 95%CI: 1.15-1.88) and using water from private wells (GMRdrink:1.47, 95%CI: 1.00-2.14 and GMRwash: 1.48, 95%CI: 1.17-1.87) were associated with higher β-HCH values. There was inverse association with breastfeeding (GMR: 0.64, 95%CI: 0.47-0.86). The focus on specific foods showed that the most important factors were eggs and beef. CONCLUSIONS The study indicated a greater contamination for older people, and those drinking and washing with water from private wells and consuming locally produced food, especially eggs and beef.
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Affiliation(s)
- S. Narduzzi
- Department of Epidemiology, Lazio Regional Health Service, ASL Roma 1, Rome, Italy
| | - F. Fantini
- Department of Prevention, Local Health Unit Roma 5, Colleferro, Italy
| | - F. Blasetti
- Department of Prevention, Local Health Unit Roma 5, Colleferro, Italy
| | - P. Rantakokko
- Department of Health Security, National Institute for Health and Welfare, Kuopio, Finland
| | - H. Kiviranta
- Department of Health Security, National Institute for Health and Welfare, Kuopio, Finland
| | - F. Forastiere
- Department of Epidemiology, Lazio Regional Health Service, ASL Roma 1, Rome, Italy
| | - P. Michelozzi
- Department of Epidemiology, Lazio Regional Health Service, ASL Roma 1, Rome, Italy
| | - D. Porta
- Department of Epidemiology, Lazio Regional Health Service, ASL Roma 1, Rome, Italy
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Brown RH, Ng DK, Steele K, Schweitzer M, Groopman JD. Mobilization of Environmental Toxicants Following Bariatric Surgery. Obesity (Silver Spring) 2019; 27:1865-1873. [PMID: 31689012 DOI: 10.1002/oby.22618] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 07/22/2019] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Persistent organic pollutants (POPs) are lipophilic environmental toxicants that accumulate in adipose tissue. Weight loss leads to mobilization and increased redistribution of these toxicants. Many are obesogens and endocrine disruptors. Increased exposure could pose long-term health risks. The study objective was to measure the changes in serum concentrations of lipophilic POPs during significant weight loss. METHODS This study enrolled 27 patients at a university hospital in a longitudinal, 6-month, observational study examining changes in POP blood levels after bariatric surgery. The primary outcome was the changes in the concentrations of 24 polychlorinated biphenyls (PCBs), 9 organochlorine pesticides (OCPs), 11 polybrominated diphenyl ethers, 2,2',4,4',5,5'-hexabromobiphenyl, and 4 perfluorochemicals (PFCs). RESULTS Older adults (those born before 1976) had baseline levels of PCBs, OCPs, and PFCs that were two- to fivefold higher than younger adults (those born after 1976). Older adults had greater increases in PCBs, OCPs, and polybrominated diphenyl ethers associated with weight loss. Conversely, younger adults had greater increases in PFCs associated with weight loss. On average, blood POP levels increased as weight loss occurred. CONCLUSIONS Although weight loss is considered beneficial, the release and redistribution of POPs to other lipid-rich organs such as the brain, kidneys, and liver warrant further investigation. Interventions should be considered to limit organ exposure to POPs when weight loss interventions are planned.
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Affiliation(s)
- Robert H Brown
- Departments of Anesthesiology, Medicine, and Radiology, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Derek K Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Kimberley Steele
- Department of Surgery, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
| | - Michael Schweitzer
- Department of Surgery, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA
| | - John D Groopman
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
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Lee DH, Porta M, Lind L, Lind PM, Jacobs DR. Neurotoxic chemicals in adipose tissue: A role in puzzling findings on obesity and dementia. Neurology 2019; 90:176-182. [PMID: 29358509 DOI: 10.1212/wnl.0000000000004851] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 10/26/2017] [Indexed: 12/28/2022] Open
Abstract
Midlife obesity is associated with increased risk of dementia, whereas late-life obesity is commonly associated with a lower risk of dementia. Although methodologic issues are often discussed in this apparent risk reversal, chronic exposure to low-dose organochlorine pesticides (OCPs), an emerging risk factor for dementia in general populations, may contribute to a direct explanation for these differences. OCPs are strong lipophilic chemicals with very long half-lives (several years), primarily stored in adipose tissue and very slowly released and metabolized over years. As serum concentrations of neurotoxic OCPs strongly correlate with brain OCPs (r = 0.95), any condition enhancing the release of OCPs from the adipose tissue into circulation would increase the risk of dementia. Increased release of OCPs from adipose tissue typically occurs in (1) dysfunctional adipocytes accompanied by uncontrolled lipolysis and (2) weight loss. Weight gain may help sequester circulating OCPs in adipose tissue. As obesity is the most common reason that adipocytes become dysfunctional, midlife obesity can increase dementia risk through the chronic release of OCPs into circulation. However, late-life obesity potentially decreases dementia risk because weight loss after midlife will increase the release of OCPs while weight gain may actually decrease the release. These countervailing forces may underlie paradoxical associations with dementia of obesity in midlife vs late life which is influenced by weight change after midlife. This hypothesis should be tested in future experimental and human studies on obesity and dementia.
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Affiliation(s)
- Duk-Hee Lee
- From the Department of Preventive Medicine (D.-H.L.), School of Medicine, Kyungpook National University, Daegu; BK21 Plus KNU Biomedical Convergence Program (D.-H.L.), Department of Biomedical Science, Kyungpook National University, Korea; Hospital del Mar Institute of Medical Research (IMIM) (M.P.), School of Medicine, Universitat Autonoma de Barcelona, and CIBERESP, Spain; Department of Medical Sciences, Cardiovascular Epidemiology (L.L.), and Department of Medical Sciences, Occupational and Environmental Medicine (P.M.L.), Uppsala University, Sweden; and Division of Epidemiology and Community Health (D.R.J.), School of Public Health, University of Minnesota, Minneapolis.
| | - Miquel Porta
- From the Department of Preventive Medicine (D.-H.L.), School of Medicine, Kyungpook National University, Daegu; BK21 Plus KNU Biomedical Convergence Program (D.-H.L.), Department of Biomedical Science, Kyungpook National University, Korea; Hospital del Mar Institute of Medical Research (IMIM) (M.P.), School of Medicine, Universitat Autonoma de Barcelona, and CIBERESP, Spain; Department of Medical Sciences, Cardiovascular Epidemiology (L.L.), and Department of Medical Sciences, Occupational and Environmental Medicine (P.M.L.), Uppsala University, Sweden; and Division of Epidemiology and Community Health (D.R.J.), School of Public Health, University of Minnesota, Minneapolis
| | - Lars Lind
- From the Department of Preventive Medicine (D.-H.L.), School of Medicine, Kyungpook National University, Daegu; BK21 Plus KNU Biomedical Convergence Program (D.-H.L.), Department of Biomedical Science, Kyungpook National University, Korea; Hospital del Mar Institute of Medical Research (IMIM) (M.P.), School of Medicine, Universitat Autonoma de Barcelona, and CIBERESP, Spain; Department of Medical Sciences, Cardiovascular Epidemiology (L.L.), and Department of Medical Sciences, Occupational and Environmental Medicine (P.M.L.), Uppsala University, Sweden; and Division of Epidemiology and Community Health (D.R.J.), School of Public Health, University of Minnesota, Minneapolis
| | - P Monica Lind
- From the Department of Preventive Medicine (D.-H.L.), School of Medicine, Kyungpook National University, Daegu; BK21 Plus KNU Biomedical Convergence Program (D.-H.L.), Department of Biomedical Science, Kyungpook National University, Korea; Hospital del Mar Institute of Medical Research (IMIM) (M.P.), School of Medicine, Universitat Autonoma de Barcelona, and CIBERESP, Spain; Department of Medical Sciences, Cardiovascular Epidemiology (L.L.), and Department of Medical Sciences, Occupational and Environmental Medicine (P.M.L.), Uppsala University, Sweden; and Division of Epidemiology and Community Health (D.R.J.), School of Public Health, University of Minnesota, Minneapolis
| | - David R Jacobs
- From the Department of Preventive Medicine (D.-H.L.), School of Medicine, Kyungpook National University, Daegu; BK21 Plus KNU Biomedical Convergence Program (D.-H.L.), Department of Biomedical Science, Kyungpook National University, Korea; Hospital del Mar Institute of Medical Research (IMIM) (M.P.), School of Medicine, Universitat Autonoma de Barcelona, and CIBERESP, Spain; Department of Medical Sciences, Cardiovascular Epidemiology (L.L.), and Department of Medical Sciences, Occupational and Environmental Medicine (P.M.L.), Uppsala University, Sweden; and Division of Epidemiology and Community Health (D.R.J.), School of Public Health, University of Minnesota, Minneapolis
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Jackson EN, Thatcher SE, Larian N, English V, Soman S, Morris AJ, Weng J, Stromberg A, Swanson HI, Pearson K, Cassis LA. Effects of Aryl Hydrocarbon Receptor Deficiency on PCB-77-Induced Impairment of Glucose Homeostasis during Weight Loss in Male and Female Obese Mice. ENVIRONMENTAL HEALTH PERSPECTIVES 2019; 127:77004. [PMID: 31306034 PMCID: PMC6794491 DOI: 10.1289/ehp4133] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 05/26/2019] [Accepted: 06/14/2019] [Indexed: 05/29/2023]
Abstract
BACKGROUND Lipophilic polychlorinated biphenyls (PCBs) accumulate with obesity, but during weight loss, liberated PCBs act as ligands of the aryl hydrocarbon receptor (AhR) to negatively influence health. Previous studies demonstrated that PCB-77 administration to obese male mice impaired glucose tolerance during weight loss. Recent studies indicate higher toxic equivalencies of dioxin-like PCBs in exposed females than males. OBJECTIVES We compared effects of PCB-77 on weight gain or loss and glucose homeostasis in male vs. female mice. We defined effects of AhR deficiency during weight gain or loss in male and female mice exposed to PCB-77. METHODS Study design was vehicle (VEH) or PCB-77 administration while fed a high-fat (HF) diet for 12 wk, followed by weight loss for 4 wk. The following groups were examined: male and female C57BL/6 mice administered VEH or PCB-77, female [Formula: see text] and [Formula: see text] mice administered VEH or PCB-77, and male [Formula: see text] and [Formula: see text] mice administered PCB-77. Glucose tolerance was quantified during weight gain (week 11) and loss (week 15); liver and adipose AhR and IRS2 (insulin receptor substrate 2) mRNA abundance, and PCB-77 concentrations were quantified at week 16. RESULTS PCB-77 attenuated development of obesity in females but not males. During weight loss, PCB-77 impaired glucose tolerance of males. AhR-deficient females (VEH) were resistant to diet-induced obesity. Compared with VEH-treated mice, HF-fed [Formula: see text] females treated with PCB-77 has less weight gain, and [Formula: see text] females had greater weight gain. During weight loss, [Formula: see text] females but not [Formula: see text] males treated with PCB-77 exhibited impaired glucose tolerance. In [Formula: see text] females administered PCB-77, IRS2 mRNA abundance was lower in adipose tissue compared with VEH-treated mice. CONCLUSION Male and female mice responded differently to PCB-77 and AhR deficiency in body weight (BW) regulation and glucose homeostasis. AhR deficiency reversed PCB-77-induced glucose impairment of obese males losing weight but augmented glucose intolerance of females. These results demonstrate sex differences in PCB-77-induced regulation of glucose homeostasis of mice. https://doi.org/10.1289/EHP4133.
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Affiliation(s)
- Erin N. Jackson
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Sean E. Thatcher
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Nika Larian
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Victoria English
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Sony Soman
- Department of Internal Medicine, University of Kentucky, Lexington, Kentucky, USA
| | - Andrew J. Morris
- Department of Internal Medicine, University of Kentucky, Lexington, Kentucky, USA
| | - Jiaying Weng
- Department of Statistics, University of Kentucky, Lexington, Kentucky, USA
| | - Arnold Stromberg
- Department of Statistics, University of Kentucky, Lexington, Kentucky, USA
| | - Hollie I. Swanson
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Kevin Pearson
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Lisa A. Cassis
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
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13
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Zhou Y, Wu S, Zhou H, Huang H, Zhao J, Deng Y, Wang H, Yang Y, Yang J, Luo L. Chiral pharmaceuticals: Environment sources, potential human health impacts, remediation technologies and future perspective. ENVIRONMENT INTERNATIONAL 2018; 121:523-537. [PMID: 30292145 DOI: 10.1016/j.envint.2018.09.041] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/20/2018] [Accepted: 09/23/2018] [Indexed: 05/06/2023]
Abstract
Chiral pharmaceuticals (CPs), including non-steroid anti-inflammatory drugs (NSAIDs), β-blockers and some herbicide and pesticides, are widely used in aquaculture, clinical treatment and many other fields. However, people are increasingly concerned about such ubiquitous pollutants, which can frequently be detected in contaminated soil and water. In large part, the significant sources of chiral pharmaceuticals stem from industrial processes, such as the direct discharge of untreated or incompletely treated wastewaters containing chiral pharmaceuticals, incorrect storage and use, animal wastes and biosolids. The main ways for human exposure to chiral pharmaceuticals are the disease treatment process and chiral pharmaceuticals contaminants. According to the results of a series of toxic studies, some diseases, even cancers, may be associated with exposure to certain chiral pharmaceuticals. Therefore, the treatment of chiral pharmaceuticals has become an important issue. The current advanced remediation techniques for chiral pharmaceuticals include the conventional method (sorption and sonolysis), biotransformation (an aerobic granular sludge-sequencing batch reactor and constructed wetland system) and advanced oxidation processes (ozonation and photocatalysis). Herein, in this review, we summarize the current status and sources of chiral pharmaceuticals, potential effects on human health, as well as the superiority, disadvantages and prospects of current advanced remediation technologies. Moreover, we also anticipate the prospect of the future research needed for chiral pharmaceuticals pollutant remediation.
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Affiliation(s)
- Yaoyu Zhou
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China; Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, Hunan Agricultural University, Changsha 410028, China.
| | - Shikang Wu
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China; Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, Hunan Agricultural University, Changsha 410028, China
| | - Hao Zhou
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hongli Huang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Jia Zhao
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Yaocheng Deng
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Hua Wang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
| | - Yuan Yang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Jian Yang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Lin Luo
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
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14
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Zong G, Valvi D, Coull B, Göen T, Hu FB, Nielsen F, Grandjean P, Sun Q. Persistent organic pollutants and risk of type 2 diabetes: A prospective investigation among middle-aged women in Nurses' Health Study II. ENVIRONMENT INTERNATIONAL 2018; 114:334-342. [PMID: 29477570 PMCID: PMC5899920 DOI: 10.1016/j.envint.2017.12.010] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 11/15/2017] [Accepted: 12/07/2017] [Indexed: 05/17/2023]
Abstract
BACKGROUND Exposure to persistent organic pollutants (POPs) may predispose to the development of type 2 diabetes (T2D), but prospective human evidence is scarce. OBJECTIVES We investigated the association between plasma-POP concentrations in the late 1990s and incident T2D over 11 years of follow-up in the Nurses' Health Study II. DISCUSSION Three organochlorine pesticides and 20 polychlorinated biphenyls (PCBs) were measured in banked plasma from 793 case-control pairs of T2D. In a multiviarate-adjusted model, T2D ORs (95%CIs) comparing extreme POP tertiles (high vs. low) were 1.67 (1.24, 2.23; Ptrend < 0.001) for hexachlorobenzene (HCB), 3.62 (2.57, 5.11; Ptrend < 0.001) for β-hexachlorocyclohexane (β-HCH), 1.55 (1.13, 2.13; Ptrend = 0.05) for p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE), and 1.95 (1.42, 2.69; Ptrend < 0.001) for total dioxin-like PCBs (DL-PCBs) which included 5 mono-ortho congeners, PCB-105, 118, 156, 157, and 167. Adjustment for previous weight change and body mass index (BMI) at blood draw attenuated these associations, but that for DL-PCBs remained (OR[95% CI] = 1.78[1.14, 2.76]; Ptrend = 0.006). Age, breastfeeding history, previous weight change and BMI at blood draw were significant predictors of plasma POP concentrations. In addition, we found significant interactions of POPs and weight change before blood draw on T2D risk. ORs (95%CIs) of T2D comparing extreme (high vs. low) POP groups were 2.00 (1.02, 3.92; Ptrend = 0.01) for HCB, 2.69 (1.34, 5.40; Ptrend < 0.001) for β-HCH, and 2.41 (1.22, 4.77; Ptrend < 0.001) for DL-PCBs in the lowest weight gain group, whereas these values were 1.29 (0.73, 2.28; Ptrend = 0.46; Pinteraction = 0.04) for HCB, 1.41 (0.77, 2.60; Ptrend = 0.24; Pinteraction = 0.003) for β-HCH, and 0.90 (0.50, 1.63; Ptrend = 0.61; Pinteraction = 0.01) for DL-PCBs in the highest weight-gain group. CONCLUSIONS Our findings suggest that elevated POP exposure may have diabetogenic potential. These data also highlight the impact of lifestyle factors, especially history of weight gain, on circulating POP concentrations and their associations with subsequent T2D risk.
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Affiliation(s)
- Geng Zong
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States
| | - Damaskini Valvi
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States
| | - Brent Coull
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States; Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States
| | - Thomas Göen
- Institute and Outpatient Clinic of Occupational, Social and Environmental Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Frank B Hu
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States; Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, United States
| | - Flemming Nielsen
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States; Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States
| | - Philippe Grandjean
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States; Institute of Public Health, University of Southern Denmark, Odense, Denmark
| | - Qi Sun
- Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, United States; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, United States.
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15
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Lee YM, Jacobs Jr. DR, Lee DH. Persistent Organic Pollutants and Type 2 Diabetes: A Critical Review of Review Articles. Front Endocrinol (Lausanne) 2018; 9:712. [PMID: 30542326 PMCID: PMC6277786 DOI: 10.3389/fendo.2018.00712] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 11/12/2018] [Indexed: 12/22/2022] Open
Abstract
Low dose persistent organic pollutants (POPs) have emerged as a new risk for type 2 diabetes (T2D). Despite substantial evidence from human and experimental studies, there are several critical issues which have not been properly addressed by POPs researchers. First, as POPs exist as mixtures, findings about POPs from human studies should be interpreted from the viewpoint of lipophilic chemical mixtures which include both measured and unmeasured POPs. Second, as POPs can directly reduce insulin secretion of beta cells, the role of POPs may be more prominent in the development of beta-cell dysfunction-dominant T2D rather than insulin resistance-dominant T2D. Third, there are multidimensional interrelationships between POPs and adipose tissue. Even though POPs are now considered as a new risk factor for T2D, independent of obesity, POPs and obesity are mechanistically linked to each other. POPs are involved in key mechanisms linking obesity and T2D, such as chronic inflammation of adipose tissue and lipotoxicity with ectopic fat accumulation. Also, POPs can explain puzzling human findings which suggest benefits of obesity because healthy adipose tissue can be protective by reducing the amount of POPs reaching other organs. Fourth, non-linear dose-response relationships between POPs and T2D are biologically possible. Although POPs are well-known endocrine disrupting chemicals (EDCs), mitochondrial dysfunction may be a more plausible mechanism due to unpredictability of EDC mixtures. As adipose tissue plays a role as an internal exposure source of POPs, how to manage POPs inside us may be essential to protect against harms of POPs.
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Affiliation(s)
- Yu-Mi Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - David R. Jacobs Jr.
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN, United States
| | - Duk-Hee Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, South Korea
- BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, Kyungpook National University, DaeguSouth Korea
- *Correspondence: Duk-Hee Lee
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16
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Rosenbaum PF, Weinstock RS, Silverstone AE, Sjödin A, Pavuk M. Metabolic syndrome is associated with exposure to organochlorine pesticides in Anniston, AL, United States. ENVIRONMENT INTERNATIONAL 2017; 108:11-21. [PMID: 28779625 PMCID: PMC5627356 DOI: 10.1016/j.envint.2017.07.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 07/18/2017] [Accepted: 07/18/2017] [Indexed: 05/22/2023]
Abstract
The Anniston Community Health Survey, a cross-sectional study, was undertaken in 2005-2007 to study environmental exposure to polychlorinated biphenyl (PCB) and organochlorine (OC) pesticides and health outcomes among residents of Anniston, AL, United States. The examination of potential risks between these pollutants and metabolic syndrome, a cluster of cardiovascular risk factors (i.e., hypertension, central obesity, dyslipidemia and dysglycemia) was the focus of this analysis. Participants were 548 adults who completed the survey and a clinic visit, were free of diabetes, and had a serum sample for clinical laboratory parameters as well as PCB and OC pesticide concentrations. Associations between summed concentrations of 35 PCB congeners and 9 individual pesticides and metabolic syndrome were examined using generalized linear modeling and logistic regression; odds ratios (OR) and 95% confidence intervals (CI) are reported. Pollutants were evaluated as quintiles and as log transformations of continuous serum concentrations. Participants were mostly female (68%) with a mean age (SD) of 53.6 (16.2) years. The racial distribution was 56% white and 44% African American; 49% met the criteria for metabolic syndrome. In unadjusted logistic regression, statistically significant and positive associations across the majority of quintiles were noted for seven individually modeled pesticides (p,p'-DDT, p,p'-DDE, HCB, β-HCCH, oxychlor, tNONA, Mirex). Following adjustment for covariables (i.e., age, sex, race, education, marital status, current smoking, alcohol consumption, positive family history of diabetes or cardiovascular disease, liver disease, BMI), significant elevations in risk were noted for p,p'-DDT across multiple quintiles (range of ORs 1.61 to 2.36), for tNONA (range of ORs 1.62-2.80) and for p,p'-DDE [OR (95% CI)] of 2.73 (1.09-6.88) in the highest quintile relative to the first. Significant trends were observed in adjusted logistic models for log10 HCB [OR=6.15 (1.66-22.88)], log10 oxychlor [OR=2.09 (1.07-4.07)] and log10 tNONA [3.19 (1.45-7.00)]. Summed PCB concentrations were significantly and positively associated with metabolic syndrome only in unadjusted models; adjustment resulted in attenuation of the ORs in both the quintile and log-transformed models. In conclusion, several OC pesticides were found to have significant associations with metabolic syndrome in the Anniston study population while no association was observed for PCBs.
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Affiliation(s)
- Paula F Rosenbaum
- Department of Public Health & Preventive Medicine, State University of New York (SUNY) Upstate Medical University, Syracuse, NY, United States.
| | - Ruth S Weinstock
- Department of Medicine, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Allen E Silverstone
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Andreas Sjödin
- National Center for Environmental Health, Center for Disease Control and Prevention, Atlanta, GA, United States
| | - Marian Pavuk
- Agency for Toxic Substances and Disease Registry, Atlanta, GA, United States
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17
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Jackson E, Shoemaker R, Larian N, Cassis L. Adipose Tissue as a Site of Toxin Accumulation. Compr Physiol 2017; 7:1085-1135. [PMID: 28915320 DOI: 10.1002/cphy.c160038] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We examine the role of adipose tissue, typically considered an energy storage site, as a potential site of toxicant accumulation. Although the production of most persistent organic pollutants (POPs) was banned years ago, these toxicants persist in the environment due to their resistance to biodegradation and widespread distribution in various environmental forms (e.g., vapor, sediment, and water). As a result, human exposure to these toxicants is inevitable. Largely due to their lipophilicity, POPs bioaccumulate in adipose tissue, resulting in greater body burdens of these environmental toxicants with obesity. POPs of major concern include polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins and furans (PCDDs/PCDFs), and polybrominated biphenyls and diphenyl ethers (PBBs/PBDEs), among other organic compounds. In this review, we (i) highlight the physical characteristics of toxicants that enable them to partition into and remain stored in adipose tissue, (ii) discuss the specific mechanisms of action by which these toxicants act to influence adipocyte function, and (iii) review associations between POP exposures and the development of obesity and diabetes. An area of controversy relates to the relative potential beneficial versus hazardous health effects of toxicant sequestration in adipose tissue. © 2017 American Physiological Society. Compr Physiol 7:1085-1135, 2017.
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Affiliation(s)
- Erin Jackson
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Robin Shoemaker
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Nika Larian
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
| | - Lisa Cassis
- Department of Pharmacology and Nutritional Sciences, University of Kentucky, Lexington, Kentucky, USA
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18
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Li L, Wania F. Mechanistic Pharmacokinetic Modeling of the Bioamplification of Persistent Lipophilic Organic Pollutants in Humans during Weight Loss. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:5563-5571. [PMID: 28436229 DOI: 10.1021/acs.est.7b00055] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Bioamplification means the liberation of persistent lipophilic organic pollutants (PLOPs) into blood from their storage in inert adipose tissue during rapid weight loss. Here, using a modified mechanistic pharmacokinetic model, we investigated how chemical properties and anthropometric parameters interact to influence the bioamplification of various PLOPs in humans. The model succeeds in reproducing literature documented weight loss-induced increments in human blood PLOP concentrations. We simulated the degree of bioamplification, as characterized by the bioamplification factor (BAmF), of hypothetical PLOPs with different combinations of partitioning and biotransformation properties at various rates of lipid loss. We also investigated how BAmF evolves with the duration of weight loss. Results show that bioamplification is expected to occur for any chemical with even moderate lipophilicity (log KOW > 2 and log KOA > 6) as long as the half-life for metabolic elimination is long relative to the time scale of relative lipid loss (e.g., exceeding 104 h in the case of lipid loss of 3 kg month-1 with an initial lipid mass of 40 kg). While BAmF of a chemical is time-variant, whether bioamplification occurs for a chemical or not is independent of the duration of weight loss. The successful application of such a simple model demonstrates that it is the lipid dynamics that predominantly govern the dynamics of PLOPs rather than vice versa.
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Affiliation(s)
- Li Li
- Department of Physical and Environmental Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario, Canada M1C 1A4
| | - Frank Wania
- Department of Physical and Environmental Sciences, University of Toronto Scarborough , 1265 Military Trail, Toronto, Ontario, Canada M1C 1A4
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19
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Kim HW, Kim JH, Lee DW, Cho SH, Jung JH, Kim KS, Lee DH. Different associations of albuminuria with total and cardiovascular mortality by concentrations of persistent organic pollutants in the elderly. ENVIRONMENTAL RESEARCH 2017; 155:175-181. [PMID: 28226276 DOI: 10.1016/j.envres.2017.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 02/06/2017] [Accepted: 02/08/2017] [Indexed: 05/03/2023]
Abstract
Epidemiologic studies have indicated that albuminuria is associated with mortality from all causes and cardiovascular disease (CVD), with substantial heterogeneity. We evaluated if the associations of urine albumin creatinine ratio (ACR) with all-cause and CVD mortality differed depending on serum concentrations of persistent organic pollutants (POPs), strong lipophilic chemical mixtures with very long half-lives, which are recently linked to many degenerative diseases. Study subjects were participants of the National Health and Nutrition Examination Survey 1999-2004 who were 60 years or older at baseline (n=1215 and 1067 for organochlorine pesticides (OCPs) and other POPs, respectively). They were followed-up through 2011 (mean follow-up periods: 8.1 and 8.0 years for OCPs and other POPs, respectively). The associations between the ACR and all-cause mortality significantly differed by the serum levels of POPs, especially organochlorine pesticides (OCPs; Pinteraction<0.01). Stratified analyses indicated that the associations between ACR and all-cause mortality became stronger as the serum levels of OCPs increased. Among the elderly with the highest tertile of OCPs, the adjusted hazard ratios were 1.0, 1.1, and 2.9 (Ptrend<0.01) across the categories of ACR (<10, 10-<30, and ≥30mg/g); however, ACR was not clearly related to mortality among the elderly with the lowest tertile of OCPs. CVD mortality showed similar interactions, as noted for all-cause mortality (Pinteraction<0.01). The different associations between albuminuria and mortality by the serum OCP levels and the little association among the elderly with low serum OCPs levels suggest that OCPs play an important role in albuminuria-related death risk. However, these findings need to be replicated in other cohort studies.
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Affiliation(s)
- Hyun-Woo Kim
- Department of Family Medicine, Hana General Hospital, 1262, 2sunhwan-ro, Heungdeok-gu, Cheongju 28378, Republic of Korea
| | - Jung-Hyun Kim
- Department of Family Medicine, Hana General Hospital, 1262, 2sunhwan-ro, Heungdeok-gu, Cheongju 28378, Republic of Korea
| | - Dong-Won Lee
- Department of Family Medicine, Hana General Hospital, 1262, 2sunhwan-ro, Heungdeok-gu, Cheongju 28378, Republic of Korea
| | - Sang-Hyun Cho
- Department of Family Medicine, Hana General Hospital, 1262, 2sunhwan-ro, Heungdeok-gu, Cheongju 28378, Republic of Korea
| | - Ji-Hoon Jung
- Department of Family Medicine, Hana General Hospital, 1262, 2sunhwan-ro, Heungdeok-gu, Cheongju 28378, Republic of Korea
| | - Ki-Su Kim
- Department of Preventative Medicine, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 700-842, Republic of Korea
| | - Duk-Hee Lee
- Department of Preventative Medicine, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 700-842, Republic of Korea.
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20
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Kim KS, Lee YM, Lee DH. Letter to the Editor. J Gerontol A Biol Sci Med Sci 2017; 72:452-453. [PMID: 27927760 DOI: 10.1093/gerona/glw232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 11/07/2016] [Indexed: 11/13/2022] Open
Affiliation(s)
- Ki-Su Kim
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Yu-Mi Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Duk-Hee Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.,BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, Kyungpook National University, Daegu, Republic of Korea
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21
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Lee YM, Kim KS, Jacobs DR, Lee DH. Persistent organic pollutants in adipose tissue should be considered in obesity research. Obes Rev 2017; 18:129-139. [PMID: 27911986 DOI: 10.1111/obr.12481] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 09/23/2016] [Accepted: 09/28/2016] [Indexed: 12/22/2022]
Abstract
Although low doses of persistent organic pollutants (POPs), strong lipophilic chemicals with long half-lives, have been linked to various endocrine, immune, nervous and reproductive system diseases, few obesity studies have considered adipose tissue as an important POPs exposure source. Because the toxicodynamics of POPs relate directly to the dynamics of adiposity, POPs might explain puzzling findings in obesity research. In two people exposed to the same amounts of environmental POPs, the one having more adipose tissue may be advantaged because POPs storage in adipose tissue can reduce burden on other critical organs. Therefore, adipose tissue can play a protective role against the POPs effects. However, two situations increase the POPs release from adipose tissue into the circulation, thereby increasing the risk that they will reach critical organs: (i) weight loss and (ii) insulin resistance. In contrast, weight gain reduces this possibility. Therefore, avoiding harmful health effects of POPs may mostly contradict conventional judgments about obesity and weight change. These contradictory situations can explain the obesity paradox, the adverse effects of intensive intentional weight loss and the protective effects of obesity against dementia. Future studies should consider that adipose tissue is widely contaminated with POPs in modern society.
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Affiliation(s)
- Y-M Lee
- Department of Preventative Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - K-S Kim
- Department of Preventative Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
| | - D R Jacobs
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - D-H Lee
- Department of Preventative Medicine, School of Medicine, Kyungpook National University, Daegu, Korea.,BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, Kyungpook National University, Daegu, Korea
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22
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Jansen A, Lyche JL, Polder A, Aaseth J, Skaug MA. Increased blood levels of persistent organic pollutants (POP) in obese individuals after weight loss-A review. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2017; 20:22-37. [PMID: 28051929 DOI: 10.1080/10937404.2016.1246391] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Lipophilic persistent organic pollutants (POP) are stored in adipose tissue. Following rapid weight loss such as when induced by bariatric surgery, an increased release of potential harmful lipophilic compounds into the blood circulation may occur. Weight reduction is recommended for overweight and obese individuals in order to decrease risk of weight-related health problems. However, in cases of significant weight reduction POP become mobilized chemicals and consequently may adversely affect health, including endocrine disruption. The objective of the present investigation was to estimate quantitatively the level of mobilization of POP following weight loss over time. According to literature search criteria, 17 studies were identified with 2061 participants. Data from 5 of the studies with 270 participants were used to assess the change in blood levels of POP in percent per kilogram weight loss. Weight loss in the included studies varied from 4.4 to 64.8 kg. In all studies, the majority of POP concentrations in blood were found to rise following weight reduction. Blood concentrations following weight reduction were elevated by 2-4% per kilogram weight loss for most POP examined. The increased POP levels were still elevated 12 mo after intervention. Most research in this field, including animal studies, is carried out on a single compound or group of selected compounds, not taking the "cocktail effect" into consideration. This does not reflect the true range of POP to which humans are actually exposed. Few chronic investigations have been published and, in particular, few studies were available that compared the increase in POP concentrations with clinical consequences as individuals lost weight. These limitations call for caution in interpreting results. The benefits of losing weight still far outweigh the potential adverse health risks. However, further studies are recommended to determine the clinical significance of increased blood levels of POPs following rapid and excessive weight loss, particularly for women attending weight reduction treatment before pregnancy.
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Affiliation(s)
- Aina Jansen
- a Center for Morbid Obesity , Department of Surgery, Innlandet Hospital Trust , Gjøvik , Norway
- b Department of Food Safety and Infection Biology , Norwegian University of Life Sciences (NMBU) , Campus Adamstuen, Oslo , Norway
| | - Jan L Lyche
- b Department of Food Safety and Infection Biology , Norwegian University of Life Sciences (NMBU) , Campus Adamstuen, Oslo , Norway
| | - Anuschka Polder
- b Department of Food Safety and Infection Biology , Norwegian University of Life Sciences (NMBU) , Campus Adamstuen, Oslo , Norway
| | - Jan Aaseth
- c Innlandet Hospital Trust , Kongsvinger Hospital Division , Kongsvinger , Norway
- d Faculty of Public Health , Hedmark University of Applied Sciences , Elverum , Norway
| | - Marit Aralt Skaug
- d Faculty of Public Health , Hedmark University of Applied Sciences , Elverum , Norway
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23
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Artacho-Cordón F, León J, Sáenz JM, Fernández MF, Martin-Olmedo P, Olea N, Arrebola JP. Contribution of Persistent Organic Pollutant Exposure to the Adipose Tissue Oxidative Microenvironment in an Adult Cohort: A Multipollutant Approach. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:13529-13538. [PMID: 27993081 DOI: 10.1021/acs.est.6b03783] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Despite growing in vitro and in vivo evidence of the putative role of persistent organic pollutants (POPs) in the induction of oxidative damage in cell structures, this issue has been poorly addressed from an epidemiologic perspective. The aim of this study was to explore associations between adipose tissue POP concentrations and the in situ oxidative microenvironment. A cross-sectional study was conducted in a subsample (n = 271) of a previously established cohort, quantifying levels of eight POPs and four groups of oxidative stress biomarkers in adipose tissue. Associations were explored using multivariate linear regression analyses adjusted for potential confounders. We assessed the combined effect of POPs on oxidative stress/glutathione system biomarkers using weighted quantile sum regression (WQS). Increased concentrations of p,p'-DDE, HCB, β-HCH, dicofol, and PCBs (congeners -138, -153, and -180) were predominantly associated with higher lipid peroxidation (TBARS) [exp(β) = 1.09-1.78, p < 0.01-0.04)] and SOD activity [exp(β) = 1.13-1.48, p < 0.01-0.05)] levels. However, only a few associations were observed with glutathione system biomarkers, e.g., PCB-180 with total glutathione [exp(β) = 1.98, p = 0.03]. The WQS index was found to be positively associated with SOD activity, and PCB-138, PCB-180, and β-HCH were the main contributors to the index. Likewise, the WQS index was positively associated with TBARS levels, with the three PCBs acting as the main contributors. This is the first epidemiological evidence of the putative disruption by POPs of the adipose tissue oxidative microenvironment. Our results indicate that POP exposure may enhance alternative pathways to the glutathione detoxification route, which might result in tissue damage. Further research is warranted to fully elucidate the potential health implications.
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Affiliation(s)
- Francisco Artacho-Cordón
- Radiology and Physical Medicine Department, University of Granada , Granada, 18012, Spain
- Instituto de Investigación Biosanitaria (ibs.GRANADA), Hospitales Universitarios de Granada , Granada, 18012, Spain
| | - Josefa León
- Instituto de Investigación Biosanitaria (ibs.GRANADA), Hospitales Universitarios de Granada , Granada, 18012, Spain
- CIBER en Enfermedades Hepáticas y Digestivas (CIBEREHD) , 28029 Madrid, Spain
| | - José M Sáenz
- Instituto de Investigación Biosanitaria (ibs.GRANADA), Hospitales Universitarios de Granada , Granada, 18012, Spain
| | - Mariana F Fernández
- Radiology and Physical Medicine Department, University of Granada , Granada, 18012, Spain
- Instituto de Investigación Biosanitaria (ibs.GRANADA), Hospitales Universitarios de Granada , Granada, 18012, Spain
- CIBER en Epidemiología y Salud Pública (CIBERESP) , 28029 Madrid, Spain
| | | | - Nicolás Olea
- Radiology and Physical Medicine Department, University of Granada , Granada, 18012, Spain
- Instituto de Investigación Biosanitaria (ibs.GRANADA), Hospitales Universitarios de Granada , Granada, 18012, Spain
- CIBER en Epidemiología y Salud Pública (CIBERESP) , 28029 Madrid, Spain
| | - Juan P Arrebola
- Instituto de Investigación Biosanitaria (ibs.GRANADA), Hospitales Universitarios de Granada , Granada, 18012, Spain
- Escuela Andaluza de Salud Pública , Granada, 18011, Spain
- Oncology Unit, Virgen de las Nieves University Hospital , Granada, 18012 Spain
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Lauritzen HB, Larose TL, Øien T, Odland JØ, van de Bor M, Jacobsen GW, Sandanger TM. Factors Associated with Maternal Serum Levels of Perfluoroalkyl Substances and Organochlorines: A Descriptive Study of Parous Women in Norway and Sweden. PLoS One 2016; 11:e0166127. [PMID: 27824939 PMCID: PMC5100957 DOI: 10.1371/journal.pone.0166127] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 10/24/2016] [Indexed: 01/01/2023] Open
Abstract
Introduction Perfluoroalkyl substances (PFASs) and organochlorines (OCs) are ubiquitous and persistent in the environment and proposed endocrine disrupting chemicals (EDCs). They can be transferred across the placenta during pregnancy, and studies suggest that the prenatal period may be particularly sensitive for influences on fetal growth and development. Several studies have investigated socio-demographic and pregnancy related factors associated with maternal serum PFAS and OC levels, but few studies have been conducted in time periods with increasing emissions of PFASs and recent emissions of OCs. Methods Serum from 424 pregnant women participating in the NICHD Scandinavian Successive Small-for-gestational Age (SGA) births study was collected in 1986–1988, and analyses of two PFASs and six OCs were conducted. Associations between EDCs and geographic, time dependent, socio-demographic and pregnancy related variables were evaluated by using multivariable linear regression models. Results Previous breastfeeding duration, time since last breastfeeding period, sampling date and country of residence were important factors associated with serum levels of PFOS and PFOA. Smoking status and pre-pregnancy BMI were negatively associated with PFOS, and maternal height was borderline negatively associated with PFOS and PFOA. Glomerular filtration rate (GFR) was negatively associated with PFOS in a sub-sample. Maternal serum levels of OCs were positively associated with maternal age, and negatively associated with previous breastfeeding duration and sampling date. Smoking had a consistently negative association with PCB 118 in a dose-dependent manner. Education level, pre-pregnancy BMI and alcohol consumption varied in importance according to the compound under study. Conclusions Several maternal factors, including potentially modifiable factors, markers of pregnancy physiology and factors also related to perinatal outcomes were associated with EDC levels. Results from this study are relevant to populations with still high PFAS and OC levels, i.e. developing countries. Moreover, we can use this knowledge about associated factors on emerging EDCs with similar properties.
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Affiliation(s)
- Hilde B. Lauritzen
- Department of Public Health and General Practice, Norwegian University for Science and Technology, Trondheim, Norway
- * E-mail:
| | - Tricia L. Larose
- Department of Public Health and General Practice, Norwegian University for Science and Technology, Trondheim, Norway
| | - Torbjørn Øien
- Department of Public Health and General Practice, Norwegian University for Science and Technology, Trondheim, Norway
| | - Jon Ø. Odland
- Department of Community Medicine, University of Tromsø – The Arctic University of Norway, Tromsø, Norway
- School of Health Systems and Public Health, University of Pretoria, Pretoria, South Africa
| | - Margot van de Bor
- Section of Health and Life Sciences, Vrije Universiteit, Amsterdam, The Netherlands
| | - Geir W. Jacobsen
- Department of Public Health and General Practice, Norwegian University for Science and Technology, Trondheim, Norway
| | - Torkjel M. Sandanger
- Department of Community Medicine, University of Tromsø – The Arctic University of Norway, Tromsø, Norway
- NILU-Norwegian Institute for Air Research, Tromsø, Norway
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Lee DH, Lind PM, Jacobs DR, Salihovic S, van Bavel B, Lind L. Association between background exposure to organochlorine pesticides and the risk of cognitive impairment: A prospective study that accounts for weight change. ENVIRONMENT INTERNATIONAL 2016; 89-90:179-84. [PMID: 26878283 DOI: 10.1016/j.envint.2016.02.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 01/05/2016] [Accepted: 02/01/2016] [Indexed: 05/03/2023]
Abstract
BACKGROUND Background exposure to organochlorine (OC) pesticides was recently linked to cognitive impairment and dementia in cross-sectional and case-control studies. This prospective study was performed to evaluate if OC pesticides at baseline are associated with the future risk of cognitive impairment in elderly, with particular focus on weight change. METHODS Plasma concentrations of 3 OC pesticides (p,p'-DDE, trans-nonachlor, and hexachlorobenzene) were measured among 989 men and women aged 70years in the Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS). Cognitive impairment was validated by reviewing medical records. During the ten year follow-up, cognitive impairment was developed in 75 subjects. When weight change from age 70 to 75 was considered in analyses, elderly with incident cases before age 75 were excluded to keep the prospective perspective, leaving 795 study subjects and 44 incident cases. RESULTS The summary measure of 3 OC pesticides predicted the development of cognitive impairment after adjusting for covariates, including weight change. Compared to subjects with OC pesticides <25th percentile, adjusted hazard ratios (HRs) in those with 25th-<75th and ≥75th percentiles were 3.5 (95% confidence interval: 1.5-8.5) and 3.2 (1.1-7.6), respectively (Ptrend=0.04). Among 506 subjects who maintained or gained body weight, adjusted HRs were 6.9 and 11.6 (1.4-92.6) among the elderly in the 25th-<75th and ≥75th percentiles compared to <25th percentile (Ptrend<0.01). CONCLUSIONS This prospective study demonstrates that background exposure to OC pesticides are linked to the risk of developing cognitive impairment in elderly. The role of the chronic exposure to low dose OC pesticides in the development of dementia should be further evaluated in other populations.
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Affiliation(s)
- Duk-Hee Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea; BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, Kyungpook National University, Daegu, Republic of Korea
| | - P Monica Lind
- Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden
| | - David R Jacobs
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota, United States
| | - Samira Salihovic
- MTM Research Center, School of Science and Technology, Örebro University, Örebro, Sweden
| | - Bert van Bavel
- MTM Research Center, School of Science and Technology, Örebro University, Örebro, Sweden
| | - Lars Lind
- Department of Medical Sciences, Cardiovascular Epidemiology, Uppsala University, Uppsala, Sweden.
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Mangum LH, Crow JA, Stokes JV, Howell GE, Ross MK, Pruett SB, Chambers JE. Exposure to p,p'-DDE Alters Macrophage Reactivity and Increases Macrophage Numbers in Adipose Stromal Vascular Fraction. Toxicol Sci 2016; 150:169-77. [PMID: 26748080 PMCID: PMC6280768 DOI: 10.1093/toxsci/kfv315] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Exposure to p,p'-DDE (DDE), the main bioaccumulative metabolite of the organochlorine insecticide p,p'-DDT, is associated with a higher prevalence of obesity, dyslipidemia, insulin resistance, metabolic syndrome, and immunomodulation. The present study was carried out to determine whether DDE perturbs adipose tissue homeostasis through modulation of macrophage function. Treatment with DDE or a cyclooxygenase-2 inhibitor prior to lipopolysaccharide exposure significantly decreased production of prostaglandins (PG) from J774a.1 macrophages in vitro. Similarly, J774A.1 cell lysates incubated with DDE or a specific cyclooxygenase-2 inhibitor (NS-398) produced significantly less PGE2 and PGF2α. Macrophage polarization studies revealed a pattern of DDE effects that were not fully consistent with a purely pro- or purely anti- M1 or M2 effect. However, DDE suppressed expression of two M1 markers (induced by an M1 stimulus) and enhanced expression of an M2 marker (induced by an M2 stimulus). Further studies including assessment of macrophage function are needed to fully characterize the effects of DDE on macrophage polarization. Obesity is characterized by an increase in the number of resident adipose tissue macrophages. To assess monocyte/macrophage recruitment to the adipose tissue in vivo, male C57Bl/6H mice were treated with 2 mg/kg DDE or corn oil vehicle for 5 days by gavage. Epididymal fat pads were digested and macrophage populations were analyzed by flow cytometry. In DDE-treated animals, there was a significant increase (37%) in F4/80(+)CD11b(+) macrophages/g of epididymal adipose over vehicle (P < .05). Together, these results suggest a role for DDE in the enhancement of adipose tissue macrophage recruitment and/or proliferation, as well as modulation of immune cell function that may contribute to the etiology of metabolic diseases associated with organochlorine exposure.
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Affiliation(s)
- Lauren H Mangum
- *Center for Environmental Health Sciences, Department of Basic Sciences, College of Veterinary Medicine and
| | - John Allen Crow
- *Center for Environmental Health Sciences, Department of Basic Sciences, College of Veterinary Medicine and
| | - John V Stokes
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762-6100
| | - George E Howell
- *Center for Environmental Health Sciences, Department of Basic Sciences, College of Veterinary Medicine and
| | - Matthew K Ross
- *Center for Environmental Health Sciences, Department of Basic Sciences, College of Veterinary Medicine and
| | - Stephen B Pruett
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762-6100
| | - Janice E Chambers
- *Center for Environmental Health Sciences, Department of Basic Sciences, College of Veterinary Medicine and
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Abstract
Possible harm from endocrine disrupting chemicals (EDCs) in humans is speculated based on two types of evidence; 1) increasing trends of suspected diseases in ecological studies of populations and 2) findings from traditional epidemiological studies of individuals. However, ecological findings are not regarded as direct human evidence of the relation between EDCs and disease, while the evidence among epidemiological studies of individuals is often inconsistent. Thus, a criticism is that linking EDCs and health in human is naively presumed without solid evidence. However, human studies of EDCs are methodologically complex and understanding methodological issues will help to interpret findings from existing human studies and to properly design optimal human studies. The key issues are low reliability of exposure assessment of EDCs with short half-lives, EDC mixtures, possibility of non-monotonic dose-response relationships, non-existence of an unexposed group, difficulties in measuring exposure during critical periods, and interactions with established risk factors. Furthermore, EDC mixtures may affect human health through other mechanisms than traditional endocrine disruption, for example glutathione depletion or mitochondrial dysfunction. Given this complexity, the most plausible scenario in humans is that exposure to EDC mixtures leads to increasing risk of related diseases at the ecological level, but inconsistent associations would be expected in traditional epidemiological studies. Although epidemiologists have long relied on Bradford Hill's criteria to objectively evaluate whether associations observed in epidemiology can be interpreted as causal, there are challenges to use these criteria for EDCs, particularly concerning consistency across studies and the findings of linear dose-response relationships. At the individual level, compared to EDCs with short half-lives, epidemiological studies of EDCs with long half-lives among populations with a relatively low exposure dose range of exposure can likely produce relatively more reliable results, because the measurement of EDCs with long half-lives likely represents typical long-term exposure and populations with exposure in the low range of doses are likely to have a reference group closer to non-exposure.
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Affiliation(s)
- Duk-Hee Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, 101 Dongin-dong, Jung-gu, Daegu, Korea, 700-422.
- BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, Kyungpook National University, Daegu, Korea.
| | - David R Jacobs
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, 1300 S 2nd St, Suite 300, Minneapolis, MN, 55454-1075, USA.
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28
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Rantakokko P, Männistö V, Airaksinen R, Koponen J, Viluksela M, Kiviranta H, Pihlajamäki J. Persistent organic pollutants and non-alcoholic fatty liver disease in morbidly obese patients: a cohort study. Environ Health 2015; 14:79. [PMID: 26420011 PMCID: PMC4588245 DOI: 10.1186/s12940-015-0066-z] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 09/17/2015] [Indexed: 05/02/2023]
Abstract
BACKGROUND In animal experiments persistent organic pollutants (POPs) cause hepatosteatosis. In epidemiological studies POPs have positive associations with serum markers of nonalcoholic fatty liver disease (NAFLD) and together with obesity synergistic association with insulin resistance. Because insulin resistance and obesity are critical in NAFLD pathogenesis, we investigated the association of serum pollutant levels with liver histology and alanine aminotransferase (ALT) in morbidly obese. METHODS Liver biopsies were from 161 participants of the Kuopio Obesity Surgery Study (KOBS) who underwent bariatric surgery 2005-2011. Liver histology was categorized as normal, steatosis and non-alcoholic steatohepatitis (NASH). Liver phenotype at baseline and ALT at baseline and 12 months post-surgery were correlated to serum POP concentrations at respective time points. As lipophilic POPs concentrate to smaller fat volume during weight loss, serum levels before and 12 months after bariatric surgery were compared. RESULTS Baseline serum concentration of PCB-118, β-HCH and several PFAAs had an inverse association with lobular inflammation possibly due to changes in bile acid metabolism. ALT had negative associations with many POPs at baseline that turned positive at 12 months after major clinical improvements. There was an interaction between some POPs and sex at 12 months, and in stratified data positive associations were observed mainly in females but not in males. CONCLUSIONS We found a negative association between serum concentrations of PCB-118, β-HCH and several PFAAs with lobular inflammation at baseline. Positive POPs-ATL associations at 12 months among women suggest that increased POP concentrations may decrease the degree of liver recovery.
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Affiliation(s)
- Panu Rantakokko
- National Institute for Health and Welfare, Department of Health Protection, Chemicals and Health Unit, Kuopio, Finland.
| | - Ville Männistö
- Department of Medicine, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland.
| | - Riikka Airaksinen
- National Institute for Health and Welfare, Department of Health Protection, Chemicals and Health Unit, Kuopio, Finland.
| | - Jani Koponen
- National Institute for Health and Welfare, Department of Health Protection, Chemicals and Health Unit, Kuopio, Finland.
| | - Matti Viluksela
- National Institute for Health and Welfare, Department of Health Protection, Chemicals and Health Unit, Kuopio, Finland.
- Department of Environmental Science, University of Eastern Finland, Kuopio, Finland.
| | - Hannu Kiviranta
- National Institute for Health and Welfare, Department of Health Protection, Chemicals and Health Unit, Kuopio, Finland.
| | - Jussi Pihlajamäki
- Institute of Public Health and Clinical Nutrition, Department of Clinical Nutrition, University of Eastern Finland, Kuopio, Finland.
- Clinical Nutrition and Obesity Center, Kuopio University Hospital, Kuopio, Finland.
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29
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Jaacks LM, Staimez LR. Association of persistent organic pollutants and non-persistent pesticides with diabetes and diabetes-related health outcomes in Asia: A systematic review. ENVIRONMENT INTERNATIONAL 2015; 76:57-70. [PMID: 25545233 DOI: 10.1016/j.envint.2014.12.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 12/03/2014] [Accepted: 12/04/2014] [Indexed: 05/12/2023]
Abstract
BACKGROUND Over half of the people with diabetes in the world live in Asia. Emerging scientific evidence suggests that diabetes is associated with environmental pollutants, exposures that are also abundant in Asia. OBJECTIVE To systematically review the literature concerning the association of persistent organic pollutants (POPs) and non-persistent pesticides with diabetes and diabetes-related health outcomes in Asia. METHODS PubMed and Embase were searched to identify studies published up to November 2014. A secondary reference review of all extracted articles and the National Toxicology Program Workshop on the association of POPs with diabetes was also conducted. A total of 19 articles met the inclusion criteria and were evaluated in this review. RESULTS To date, the evidence relating POPs and non-persistent pesticides with diabetes in Asian populations is equivocal. Positive associations were reported between serum concentrations of polychlorinated dibenzodioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), and several organochlorine pesticides (DDT, DDE, oxychlordane, trans-nonachlor, hexachlorobenzene, hexachlorocyclohexane) with diabetes. PCDD/Fs were also associated with blood glucose and insulin resistance, but not beta-cell function. There were substantial limitations of the literature including: most studies were cross-sectional, few studies addressed selection bias and confounding, and most effect estimates had exceptionally wide confidence intervals. Few studies evaluated the effects of organophosphates. CONCLUSIONS Well-conducted research is urgently needed on these pervasive exposures to inform policies to mitigate the diabetes epidemic in Asia.
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Affiliation(s)
- Lindsay M Jaacks
- Department of Nutrition, Gillings School of Global Public Health, The University of North Carolina, Chapel Hill, NC, USA
| | - Lisa R Staimez
- Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA.
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Kim KS, Lee YM, Lee HW, Jacobs DR, Lee DH. Associations between organochlorine pesticides and cognition in U.S. elders: National Health and Nutrition Examination Survey 1999-2002. ENVIRONMENT INTERNATIONAL 2015; 75:87-92. [PMID: 25461417 DOI: 10.1016/j.envint.2014.11.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 11/03/2014] [Accepted: 11/11/2014] [Indexed: 05/06/2023]
Abstract
There is limited evidence about whether background exposure to organochlorine pesticides is related to impairment of cognitive function in general populations. This study was performed to investigate cross-sectional associations between serum concentrations of organochlorine pesticides and cognitive function, a predictor of dementia, among U.S. elders without overt dementia. Study subjects were 644 elders aged 60-85, participating in the National Health and Nutrition Examination Survey 1999-2002. We selected 6 organochlorine pesticides (p,p'-dichlorodiphenyltrichloroethane (DDT), p,p'-dichlorodiphenyldichloroethylene (DDE), trans-nonachlor, oxychlordane, heptachlor epoxide, and β-hexachlorocyclohexane) which were commonly detected in current general population. Cognitive function was assessed with the Digit-Symbol Substitution Test. All 6 compounds showed statistically significant or marginally significant inverse associations with cognitive score after adjusting for covariates including education levels. The strongest association was observed with p,p'-DDT. With the outcome of low cognitive score defined as <25th percentile, elders in the highest quartile of p,p'-DDT, p,p'-DDE, and β-hexachlorocyclohexane had 2 to 3 times higher risks than those in the lowest quartile. In particular, when their concentrations were further divided with the cutoff points of 90th and 95th percentiles, p,p'-DDT in the highest 5th percentile showed 6.5 (95% confidence interval: 2.6-16.3) times higher risk of low cognitive score. On the other hand, non-persistent pesticides like organophosphates or pyrethroid showed little association with this cognitive score. The potential role of background exposure to organochlorine pesticides in the development of dementia should be explored in future prospective studies and in-vitro/in-vivo experimental studies.
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Affiliation(s)
- Ki-Su Kim
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Yu-Mi Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Ho-Won Lee
- Dept. of Neurology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea; Brain Science & Engineering Institute, Kyungpook National University, Daegu, Republic of Korea
| | - David R Jacobs
- Division of Epidemiology, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - Duk-Hee Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea; BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, Kyungpook National University, Daegu, Republic of Korea.
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31
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Reyes CA, Ramos-Jiliberto R, González-Barrientos J. Temporal variability of food determines the outcome of pesticide exposure in Daphnia. Ecol Res 2015. [DOI: 10.1007/s11284-014-1240-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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32
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He Q, Chen C, Dong Q, Xue G, Chen C, Lu ZL, Bechara A. Gray and white matter structures in the midcingulate cortex region contribute to body mass index in Chinese young adults. Brain Struct Funct 2015; 220:319-29. [PMID: 24146133 PMCID: PMC3995892 DOI: 10.1007/s00429-013-0657-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 10/09/2013] [Indexed: 12/13/2022]
Abstract
Overweight and obesity are rapidly becoming a central public health challenge around the world. Previous studies have suggested that elevated Body Mass Index (BMI) might be associated with structural changes in both gray and white matter, but this association is still not well understood. The present study aimed to investigate the relationship between BMI and brain structure with a relatively large sample of young adults (N = 336) in a small age range (20 ± 1 years). Voxel-based morphometry results showed significant negative correlations between BMI and gray-matter volumes in the midcingulate cortex (MCC), left orbital frontal cortex, and left ventromedial prefrontal cortex. There was also a significant negative correlation between BMI and white matter integrity as indexed by fractional anisotropy in bilateral cingulum. Further tractography analysis showed a significant negative correlation between BMI and the number of fibers passing the MCC region. Regression analysis showed that gray matter and white matter in these regions both contributed to the variance of BMI. These results remained significant even when analysis was restricted to the subjects with normal weights. Finally, we found that decision-making ability (as assessed by the Iowa Gambling Task) mediated the association between the structure of the MCC (a region responsible for impulse control and decision making) and BMI. These results shed light on the structural neural basis of weight variations.
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Affiliation(s)
- Qinghua He
- Faculty of Psychology, Southwest University, Beibei, Chongqing 400715, China
- National Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, 100875, China
- Brain and Creativity Institute, University of Southern California, Los Angeles, California 90089, USA
| | - Chuansheng Chen
- Department of Psychology and Social Behavior, University of California, Irvine, Irvine, California 92697, USA
| | - Qi Dong
- National Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, 100875, China
| | - Gui Xue
- National Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, 100875, China
| | - Chunhui Chen
- National Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, 100875, China
| | - Zhong-Lin Lu
- Center for Cognitive and Behavioral Brain Imaging, The Ohio State University, Columbus, OH 43210, USA
| | - Antoine Bechara
- Brain and Creativity Institute, University of Southern California, Los Angeles, California 90089, USA
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Schuhmacher M, Fàbrega F, Kumar V, García F, Nadal M, Domingo JL. A PBPK model to estimate PCDD/F levels in adipose tissue: comparison with experimental values of residents near a hazardous waste incinerator. ENVIRONMENT INTERNATIONAL 2014; 73:150-157. [PMID: 25118088 DOI: 10.1016/j.envint.2014.07.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 07/09/2014] [Accepted: 07/25/2014] [Indexed: 06/03/2023]
Abstract
This study was aimed at determining the concentrations of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) in 15 samples of adipose tissue from subjects who had been living in the vicinity of a hazardous waste incinerator (HWI). The results were compared with levels obtained in previous surveys carried out in 1998 (baseline study), 2002 and 2007. The current (2013) concentrations of PCDD/Fs in adipose tissue ranged from 2.8 to 46.3 pg WHO-TEQ/g fat (mean and median concentrations: 11.5 and 7.4 pg WHO-TEQ/g fat, respectively), being significantly lower (64%) than those observed in 1998. In contrast, no significant differences in the mean PCDD/F concentrations were noted in the period 2002-2013. The significant decrease of the PCDD/F content in fat, also noted in other biological monitors such as plasma and breast milk, is in agreement with the reduction in the dietary intake of PCDD/Fs found in the same area of study. Similarly to other investigations across Europe, an increase of PCDD/F levels in adipose tissue in relation to age was observed, while no significant differences were noted according to gender. A multicompartmental physiologically-based pharmacokinetic (PBPK) model was also applied to estimate the levels of PCDD/Fs in adipose tissue. When comparing the modeled and experimental concentrations of PCDD/Fs in that tissue, very similar values were obtained for the four surveys, which indicates this can be a reliable tool to predict the internal dose of PCDD/Fs.
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Affiliation(s)
- Marta Schuhmacher
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201 Reus, Catalonia, Spain; Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Catalonia, Spain
| | - Francesc Fàbrega
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201 Reus, Catalonia, Spain; Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Catalonia, Spain
| | - Vikas Kumar
- Environmental Engineering Laboratory, Departament d'Enginyeria Quimica, Universitat Rovira i Virgili, Av. Països Catalans 26, 43007 Tarragona, Catalonia, Spain
| | - Francisco García
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201 Reus, Catalonia, Spain; Institut de Medicina Legal de Catalunya (IMLC), Divisió de Tarragona, Av. President Companys 10, 43005 Tarragona, Catalonia, Spain
| | - Martí Nadal
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201 Reus, Catalonia, Spain
| | - José L Domingo
- Laboratory of Toxicology and Environmental Health, School of Medicine, IISPV, Universitat Rovira i Virgili, Sant Llorenç 21, 43201 Reus, Catalonia, Spain.
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Lee YM, Kim KS, Kim SA, Hong NS, Lee SJ, Lee DH. Prospective associations between persistent organic pollutants and metabolic syndrome: a nested case-control study. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 496:219-225. [PMID: 25089684 DOI: 10.1016/j.scitotenv.2014.07.039] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 06/15/2014] [Accepted: 07/11/2014] [Indexed: 06/03/2023]
Abstract
OBJECTIVE Exposure to persistent organic pollutants (POPs) has recently been linked to metabolic syndrome (MetS) and some MetS components. However, prospective evidence in humans is scarce, and the nature of the dose-response relationship is unclear. We evaluated the association between POPs and MetS using a nested-case control study within a community-based Korean cohort. METHOD The study subjects were 64 patients newly diagnosed with MetS during a 4-year follow-up, and the controls were 182 subjects without MetS. Concentrations of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) were measured in stored serum collected at baseline. RESULTS The concentrations of most PCBs and some OCPs such as β-hexachlorocyclohexane, hexachlorobenzene, oxychlordane, and heptachlor epoxide predicted the risk for MetS. The POP exposure and MetS showed an inverted U-shaped or a linear association with plateau rather than a linear dose-response association. When the summary measure of the PCBs and OCPs was used, the adjusted odds ratios (ORs) across the quartiles of the summary measure were 1.0, 1.3, 3.8 (95% confidence interval, 1.3-10.7), and 2.1 (Pquadratic=0.013) after adjusting for potential confounders. In the analyses of each of the five MetS components, POP exposure was mainly associated with an increased risk for glucose and lipid metabolism disturbances. CONCLUSION This study demonstrated that chronic exposure to a mixture of PCBs and OCPs can increase the risk for MetS within the low-dose background exposure range of POPs. As the findings of this study suggest a nonmonotonic dose-response relationship, in vitro and in vivo experimental studies are needed to understand the underlying mechanisms.
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Affiliation(s)
- Yu-Mi Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 700-842, Republic of Korea; Regional Cardiocerebrovascular Center, Kyungpook National University Hospital, 130 Dongdeok-ro, Jung-gu, Daegu 700-721, Republic of Korea
| | - Ki-Su Kim
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 700-842, Republic of Korea
| | - Se-A Kim
- Department of Biomedical Science, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 700-842, Republic of Korea; BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, Kyungpook National University, Republic of Korea
| | - Nam-Soo Hong
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 700-842, Republic of Korea
| | - Su-Jin Lee
- Department of Epidemiology and Health Promotion, School of Public Health, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 700-842, Republic of Korea
| | - Duk-Hee Lee
- Department of Preventive Medicine, School of Medicine, Kyungpook National University, 680 Gukchaebosang-ro, Jung-gu, Daegu 700-842, Republic of Korea; BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science, Kyungpook National University, Republic of Korea.
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Vizcaino E, Grimalt JO, Glomstad B, Fernández-Somoano A, Tardón A. Gestational weight gain and exposure of newborns to persistent organic pollutants. ENVIRONMENTAL HEALTH PERSPECTIVES 2014; 122:873-9. [PMID: 24786842 PMCID: PMC4123021 DOI: 10.1289/ehp.1306758] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 05/01/2014] [Indexed: 05/03/2023]
Abstract
BACKGROUND Exposure to persistent organic pollutants (POPs) during fetal development can increase the risk of adverse health effects during childhood. Maternal characteristics and physiological changes during gestation, such as gestational weight gain (GWG), may have an influence in the overall burden of POPs in neonates. However, the associations between GWG and POP concentrations are still not well established. OBJECTIVE We examined the association of GWG with cord serum POPs concentrations after adjusting for prepregnancy maternal body mass index (BMI) and other potential determinants of the transfer of POPs into newborns. The GWG values were evaluated after grouping by the reference guidelines of the Institute of Medicine (IOM). METHODS We measured levels of 14 organochlorine pesticides, 7 polychlorobiphenyls (PCBs), and 14 polybrominated diphenyl ethers (PBDEs) in 325 cord serum samples from a Spanish birth cohort. Multivariable models were used to estimate associations of GWG, prepregnancy BMI, and other maternal determinants on cord serum concentrations of POPs. RESULTS Neonatal concentrations of POPs were inversely associated with GWG after adjustment for age, prepregnancy BMI, educational level, and fish consumption. On average, neonates of women with IOM-recommended GWG have lower POP concentrations than do neonates of mothers with inadequate GWG. CONCLUSIONS The present findings suggest an association between neonatal exposure to POPs and inadequate GWG during pregnancy. Encouraging pregnant women to meet the recommended IOM guidelines for GWG may reduce the accumulation of POPs in newborns.
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Affiliation(s)
- Esther Vizcaino
- Department of Preventive Medicine and Public Health, University of Oviedo, Asturias, Spain
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Azandjeme CS, Delisle H, Fayomi B, Ayotte P, Djrolo F, Houinato D, Bouchard M. High serum organochlorine pesticide concentrations in diabetics of a cotton producing area of the Benin Republic (West Africa). ENVIRONMENT INTERNATIONAL 2014; 69:1-8. [PMID: 24769438 DOI: 10.1016/j.envint.2014.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 03/10/2014] [Accepted: 04/02/2014] [Indexed: 06/03/2023]
Abstract
The Borgou region of northern Benin is a major cotton producing area and consistently uses higher amounts of pesticides than other areas of the country. Organochlorine pesticides (OCPs), poorly handled, have been widely used and are still illegally present. We therefore hypothesized that serum OCP levels would be high in Borgou. As part of a case-control study on diabetes status and pesticide exposure, we measured the distribution of serum concentrations of 14 OCPs by gas chromatography with mass spectrometry. A sample of 118 diabetic subjects was selected using a four-stage cluster sampling with 54.2% of men and 45.8% of women; 43% lived in urban areas, 14.4% were obese and 39.8% had high economic status. The four detected OCPs were p,p'-DDT, p,p'-DDE, β-HCH and trans-nonachlor with respective geometric means (geometric standard deviation) of 497.1 (4.5), 20.6 (7.9), 2.9 (3.4), and 2.0 (2.3) ng/g of total serum lipids. OCP levels were significantly higher in obese, wealthier and more educated subjects and in those living in urban areas as compared to the other groups, particularly for p,p'-DDE, p,p'-DDT and β-HCH. Levels of DDT and DDE were higher than reported in other countries where DDT is no longer permitted. The low DDT/DDE ratio of 0.05 suggests past human exposure through food contamination. There is thus a need to reinforce governmental regulations for a more responsible use of pesticides in the country, in order to reduce health risks associated with persistent organic pollutants.
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Affiliation(s)
- Colette S Azandjeme
- TRANSNUT, WHO Collaborating Centre on Nutrition Changes and Development, Department of Nutrition, Lilian-Stewart Building, Faculty of Medicine, University of Montreal, PO Box 6128, Downtown Station, Montreal (QC), Canada H3C 3J7; Regional Institute for Public Health, University of Abomey-Calavi, 01 BP 918 Cotonou, Benin.
| | - Hélène Delisle
- TRANSNUT, WHO Collaborating Centre on Nutrition Changes and Development, Department of Nutrition, Lilian-Stewart Building, Faculty of Medicine, University of Montreal, PO Box 6128, Downtown Station, Montreal (QC), Canada H3C 3J7.
| | - Benjamin Fayomi
- Faculty of Health Sciences, University of Abomey-Calavi, 01 BP 188 Cotonou, Benin.
| | - Pierre Ayotte
- Toxicology Laboratory, National Public Health Institute of Quebec, Quebec (QC), Canada G1V 5B3; Population Health and Optimal Health Practices Research Unit, CHU de Québec Research Centre, Québec (QC), Canada G1V 2M2.
| | - Francois Djrolo
- Faculty of Health Sciences, University of Abomey-Calavi, 01 BP 188 Cotonou, Benin; National University Hospital CNHU-HKM, Center of Diabetes Care, Benin
| | - Dismand Houinato
- Faculty of Health Sciences, University of Abomey-Calavi, 01 BP 188 Cotonou, Benin; Benin Republic National Program of Non Communicable Diseases, Benin
| | - Michèle Bouchard
- Department of Environmental and Occupational Health, Toxicological Risk Assessment and Management, University of Montreal, PO Box 6128, Downtown Station, Montreal (QC), Canada H3C 3J7.
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Lee DH, Porta M, Jacobs DR, Vandenberg LN. Chlorinated persistent organic pollutants, obesity, and type 2 diabetes. Endocr Rev 2014; 35:557-601. [PMID: 24483949 PMCID: PMC5393257 DOI: 10.1210/er.2013-1084] [Citation(s) in RCA: 296] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Persistent organic pollutants (POPs) are lipophilic compounds that travel with lipids and accumulate mainly in adipose tissue. Recent human evidence links low-dose POPs to an increased risk of type 2 diabetes (T2D). Because humans are contaminated by POP mixtures and POPs possibly have nonmonotonic dose-response relations with T2D, critical methodological issues arise in evaluating human findings. This review summarizes epidemiological results on chlorinated POPs and T2D, and relevant experimental evidence. It also discusses how features of POPs can affect inferences in humans. The evidence as a whole suggests that, rather than a few individual POPs, background exposure to POP mixtures-including organochlorine pesticides and polychlorinated biphenyls-can increase T2D risk in humans. Inconsistent statistical significance for individual POPs may arise due to distributional differences in POP mixtures among populations. Differences in the observed shape of the dose-response curves among human studies may reflect an inverted U-shaped association secondary to mitochondrial dysfunction or endocrine disruption. Finally, we examine the relationship between POPs and obesity. There is evidence in animal studies that low-dose POP mixtures are obesogenic. However, relationships between POPs and obesity in humans have been inconsistent. Adipose tissue plays a dual role of promoting T2D and providing a relatively safe place to store POPs. Large prospective studies with serial measurements of a broad range of POPs, adiposity, and clinically relevant biomarkers are needed to disentangle the interrelationships among POPs, obesity, and the development of T2D. Also needed are laboratory experiments that more closely mimic real-world POP doses, mixtures, and exposure duration in humans.
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Affiliation(s)
- Duk-Hee Lee
- Department of Preventive Medicine (D.-H.L.), School of Medicine, Kyungpook National University, Daegu 700-422, Korea; BK21 Plus KNU Biomedical Convergence Program, Department of Biomedical Science (D.-H.L.), Kyungpook National University, Korea; Hospital del Mar Institute of Medical Research (M.P.), School of Medicine, Universitat Autonoma de Barcelona, and Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública, Barcelona 08193, Spain; Division of Epidemiology (D.R.J.), School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455; Department of Nutrition (D.R.J.), University of Oslo, 0313 Oslo, Norway; and University of Massachusetts-Amherst (L.N.V.), School of Public Health, Division of Environmental Health Sciences, Amherst, Massachusetts 01003
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Regnier SM, Sargis RM. Adipocytes under assault: environmental disruption of adipose physiology. BIOCHIMICA ET BIOPHYSICA ACTA 2014; 1842:520-33. [PMID: 23735214 PMCID: PMC3823640 DOI: 10.1016/j.bbadis.2013.05.028] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 04/29/2013] [Accepted: 05/24/2013] [Indexed: 12/12/2022]
Abstract
The burgeoning obesity epidemic has placed enormous strains on individual and societal health mandating a careful search for pathogenic factors, including the contributions made by endocrine disrupting chemicals (EDCs). In addition to evidence that some exogenous chemicals have the capacity to modulate classical hormonal signaling axes, there is mounting evidence that several EDCs can also disrupt metabolic pathways and alter energy homeostasis. Adipose tissue appears to be a particularly important target of these metabolic disruptions. A diverse array of compounds has been shown to alter adipocyte differentiation, and several EDCs have been shown to modulate adipocyte physiology, including adipocytic insulin action and adipokine secretion. This rapidly emerging evidence demonstrating that environmental contaminants alter adipocyte function emphasizes the potential role that disruption of adipose physiology by EDCs may play in the global epidemic of metabolic disease. Further work is required to better characterize the molecular targets responsible for mediating the effects of EDCs on adipose tissue. Improved understanding of the precise signaling pathways altered by exposure to environmental contaminants will enhance our understanding of which chemicals pose a threat to metabolic health and how those compounds synergize with lifestyle factors to promote obesity and its associated complications. This knowledge may also improve our capacity to predict which synthetic compounds may alter energy homeostasis before they are released into the environment while also providing critical evidentiary support for efforts to restrict the production and use of chemicals that pose the greatest threat to human metabolic health. This article is part of a Special Issue entitled: Modulation of Adipose Tissue in Health and Disease.
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Affiliation(s)
- Shane M Regnier
- Committee on Molecular Metabolism and Nutrition, University of Chicago, Chicago, IL, USA
| | - Robert M Sargis
- Committee on Molecular Metabolism and Nutrition, University of Chicago, Chicago, IL, USA; Kovler Diabetes Center, University of Chicago, Chicago, IL, USA; Section of Endocrinology, Diabetes and Metabolism, University of Chicago, Chicago, IL, USA.
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Exposure to Dichlorodiphenyltrichloroethane and the Risk of Breast Cancer: A Systematic Review and Meta-analysis. Osong Public Health Res Perspect 2014; 5:77-84. [PMID: 24955316 PMCID: PMC4064641 DOI: 10.1016/j.phrp.2014.02.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 02/13/2014] [Accepted: 02/14/2014] [Indexed: 11/25/2022] Open
Abstract
Objectives This study extended and updated a meta-analysis of the association between exposure to dichlorodiphenyltrichloroethane (DDT) and the risk of breast cancer. Methods We reviewed the published literature on exposure to DDE and breast cancer risk to update a meta-analysis from 2004. The total of 35 studies included 16 hospital-based case–control studies, 11 population-based case–control studies, and 10 nested case–control studies identified through keyword searches in the PubMed and EMBASE databases. Results The summary odds ratio (OR) for the identified studies was 1.03 (95% confidence interval 0.95–1.12) and the overall heterogeneity in the OR was observed (I2 = 40.9; p = 0.006). Subgroup meta-analyses indicated no significant association between exposure to DDE and breast cancer risk by the type of design, study years, biological specimen, and geographical region of the study, except from population-based case–control studies with estimated DDE levels in serum published in 1990s. Conclusion Existing studies do not support the view that DDE increases the risk of breast cancer in humans. However, further studies incorporating more detailed information on DDT exposure and other potential risk factors for breast cancer are needed.
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Persistent organic pollutants and diabetes: A review of the epidemiological evidence. DIABETES & METABOLISM 2014; 40:1-14. [DOI: 10.1016/j.diabet.2013.09.006] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 09/26/2013] [Accepted: 09/26/2013] [Indexed: 01/09/2023]
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Taylor KW, Novak RF, Anderson HA, Birnbaum LS, Blystone C, Devito M, Jacobs D, Köhrle J, Lee DH, Rylander L, Rignell-Hydbom A, Tornero-Velez R, Turyk ME, Boyles AL, Thayer KA, Lind L. Evaluation of the association between persistent organic pollutants (POPs) and diabetes in epidemiological studies: a national toxicology program workshop review. ENVIRONMENTAL HEALTH PERSPECTIVES 2013; 121:774-83. [PMID: 23651634 PMCID: PMC3701910 DOI: 10.1289/ehp.1205502] [Citation(s) in RCA: 235] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Accepted: 05/01/2013] [Indexed: 05/08/2023]
Abstract
BACKGROUND Diabetes is a major threat to public health in the United States and worldwide. Understanding the role of environmental chemicals in the development or progression of diabetes is an emerging issue in environmental health. OBJECTIVE We assessed the epidemiologic literature for evidence of associations between persistent organic pollutants (POPs) and type 2 diabetes. METHODS Using a PubMed search and reference lists from relevant studies or review articles, we identified 72 epidemiological studies that investigated associations of persistent organic pollutants (POPs) with diabetes. We evaluated these studies for consistency, strengths and weaknesses of study design (including power and statistical methods), clinical diagnosis, exposure assessment, study population characteristics, and identification of data gaps and areas for future research. CONCLUSIONS Heterogeneity of the studies precluded conducting a meta-analysis, but the overall evidence is sufficient for a positive association of some organochlorine POPs with type 2 diabetes. Collectively, these data are not sufficient to establish causality. Initial data mining revealed that the strongest positive correlation of diabetes with POPs occurred with organochlorine compounds, such as trans-nonachlor, dichlorodiphenyldichloroethylene (DDE), polychlorinated biphenyls (PCBs), and dioxins and dioxin-like chemicals. There is less indication of an association between other nonorganochlorine POPs, such as perfluoroalkyl acids and brominated compounds, and type 2 diabetes. Experimental data are needed to confirm the causality of these POPs, which will shed new light on the pathogenesis of diabetes. This new information should be considered by governmental bodies involved in the regulation of environmental contaminants.
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Affiliation(s)
- Kyla W Taylor
- Office of Health Assessment and Translation, Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina 27709 , USA.
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Chen C, Chen W, Chen C, Moyzis R, He Q, Lei X, Li J, Wang Y, Liu B, Xiu D, Zhu B, Dong Q. Genetic variations in the serotoninergic system contribute to body-mass index in Chinese adolescents. PLoS One 2013; 8:e58717. [PMID: 23554917 PMCID: PMC3598805 DOI: 10.1371/journal.pone.0058717] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2012] [Accepted: 02/05/2013] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVE Obesity has become a worldwide health problem in the past decades. Human and animal studies have implicated serotonin in appetite regulation, and behavior genetic studies have shown that body mass index (BMI) has a strong genetic component. However, the roles of genes related to the serotoninergic (5-hydroxytryptamine,5-HT) system in obesity/BMI are not well understood, especially in Chinese subjects. SUBJECTS AND DESIGN With a sample of 478 healthy Chinese volunteers, this study investigated the relation between BMI and genetic variations of the serotoninergic system as characterized by 136 representative polymorphisms. We used a system-level approach to identify SNPs associated with BMI, then estimated their overall contribution to BMI by multiple regression and verified it by permutation. RESULTS We identified 12 SNPs that made statistically significant contributions to BMI. After controlling for gender and age, four of these SNPs accounted for 7.7% additional variance of BMI. Permutation analysis showed that the probability of obtaining these findings by chance was low (p = 0.015, permuted for 1000 times). CONCLUSION These results showed that genetic variations in the serotoninergic system made a moderate contribution to individual differences in BMI among a healthy Chinese sample, suggesting that a similar approach can be used to study obesity.
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Affiliation(s)
- Chunhui Chen
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Wen Chen
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Chuansheng Chen
- Department of Psychology and Social Behavior, University of California Irvine, Irvine, California, United States of America
| | - Robert Moyzis
- Department of Biological Chemistry and Institute of Genomics and Bioinformatics, University of California Irvine, Irvine, California, United States of America
| | - Qinghua He
- Department of Psychology, University of Southern California, Los Angeles, California, United States of America
| | - Xuemei Lei
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Jin Li
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Yunxin Wang
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Bin Liu
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Daiming Xiu
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Bi Zhu
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Qi Dong
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
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La Merrill M, Emond C, Kim MJ, Antignac JP, Le Bizec B, Clément K, Birnbaum LS, Barouki R. Toxicological function of adipose tissue: focus on persistent organic pollutants. ENVIRONMENTAL HEALTH PERSPECTIVES 2013; 121:162-9. [PMID: 23221922 PMCID: PMC3569688 DOI: 10.1289/ehp.1205485] [Citation(s) in RCA: 226] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 12/04/2012] [Indexed: 05/17/2023]
Abstract
BACKGROUND Adipose tissue (AT) is involved in several physiological functions, including metabolic regulation, energy storage, and endocrine functions. OBJECTIVES In this review we examined the evidence that an additional function of AT is to modulate persistent organic pollutant (POP) toxicity through several mechanisms. METHODS We reviewed the literature on the interaction of AT with POPs to provide a comprehensive model for this additional function of AT. DISCUSSION As a storage compartment for lipophilic POPs, AT plays a critical role in the toxicokinetics of a variety of drugs and pollutants, in particular, POPs. By sequestering POPs, AT can protect other organs and tissues from POPs overload. However, this protective function could prove to be a threat in the long run. The accumulation of lipophilic POPs will increase total body burden. These accumulated POPs are slowly released into the bloodstream, and more so during weight loss. Thus, AT constitutes a continual source of internal exposure to POPs. In addition to its buffering function, AT is also a target of POPs and may mediate part of their metabolic effects. This is particularly relevant because many POPs induce obesogenic effects that may lead to quantitative and qualitative alterations of AT. Some POPs also induce a proinflammatory state in AT, which may lead to detrimental metabolic effects. CONCLUSION AT appears to play diverse functions both as a modulator and as a target of POPs toxicity.
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Affiliation(s)
- Michele La Merrill
- Department of Preventive Medicine, Mount Sinai School of Medicine, New York, New York, USA
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Lind PM, Lee DH, Jacobs DR, Salihovic S, van Bavel B, Wolff MS, Lind L. Circulating levels of persistent organic pollutants are related to retrospective assessment of life-time weight change. CHEMOSPHERE 2013; 90:998-1004. [PMID: 22921642 DOI: 10.1016/j.chemosphere.2012.07.051] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 07/18/2012] [Accepted: 07/25/2012] [Indexed: 06/01/2023]
Abstract
BACKGROUND Persistent organic pollutants (POPs) have been suggested to be linked to obesity. We have previously shown that less-chlorinated PCBs were positively related to fat mass, while highly-chlorinated PCBs were inversely related to obesity. OBJECTIVE The aim of the present evaluation is to investigate the relationship between retrospective assessed life-time change in body weight (20-70 years) with circulating POP levels measured at age 70 years. METHODS 1016 subjects aged 70 years were investigated in the Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUSs) study. 16 PCBs and 3 OC pesticides were analyzed using HRGC/HRMS. Current body weight was measured and participants self-reported their weight at age 20. RESULTS The average estimated weight change over 50 years was 14.4 kg. Both the sum of OC pesticide concentrations (4.3 kg more weight gain in quintile 5 vs. quintile 1, p<0.0001) and the sum of the less-chlorinated PCBs were positively related to the estimated weight change (3.7 kg more weight gain in quintile 2 vs. quintile 1, non-linear relationship p=0.0015). In contrast, the sum of concentrations of highly-chlorinated PCBs were inversely related to estimated weight change (8.4 kg less weight gain in quintile 5 vs. quintile 1, p<0.0001). CONCLUSION High levels of OC pesticides and the less-chlorinated PCBs at age 70 were associated with a pronounced estimated weight change over the previous 50 years. However, the opposite was seen for highly-chlorinated PCBs. Differences in mode of action, toxicokinetics, non-linear relationships and reverse causation might explain these discrepancies.
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Affiliation(s)
- P M Lind
- Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden.
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Baker NA, Karounos M, English V, Fang J, Wei Y, Stromberg A, Sunkara M, Morris AJ, Swanson HI, Cassis LA. Coplanar polychlorinated biphenyls impair glucose homeostasis in lean C57BL/6 mice and mitigate beneficial effects of weight loss on glucose homeostasis in obese mice. ENVIRONMENTAL HEALTH PERSPECTIVES 2013; 121:105-10. [PMID: 23099484 PMCID: PMC3553436 DOI: 10.1289/ehp.1205421] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Accepted: 10/24/2012] [Indexed: 05/16/2023]
Abstract
BACKGROUND Previous studies demonstrated that coplanar polychlorinated biphenyls (PCBs) promote proinflammatory gene expression in adipocytes. PCBs are highly lipophilic and accumulate in adipose tissue, a site of insulin resistance in persons with type 2 diabetes. OBJECTIVES We investigated the in vitro and in vivo effects of coplanar PCBs on adipose expression of tumor necrosis factor α (TNF-α) and on glucose and insulin homeostasis in lean and obese mice. METHODS We quantified glucose and insulin tolerance, as well as TNF-α levels, in liver, muscle, and adipose tissue of male C57BL/6 mice administered vehicle, PCB-77, or PCB-126 and fed a low fat (LF) diet. Another group of mice administered vehicle or PCB-77 were fed a high fat (HF) diet for 12 weeks; the diet was then switched from HF to LF for 4 weeks to induce weight loss. We quantified glucose and insulin tolerance and adipose TNF-α expression in these mice. In addition, we used in vitro and in vivo studies to quantify aryl hydrocarbon receptor (AhR)-dependent effects of PCB-77 on parameters of glucose homeostasis. RESULTS Treatment with coplanar PCBs resulted in sustained impairment of glucose and insulin tolerance in mice fed the LF diet. In PCB-77-treated mice, TNF-α expression was increased in adipose tissue but not in liver or muscle. PCB-77 levels were strikingly higher in adipose tissue than in liver or serum. Antagonism of AhR abolished both in vitro and in vivo effects of PCB-77. In obese mice, PCB-77 had no effect on glucose homeostasis, but glucose homeostasis was impaired after weight loss. CONCLUSIONS Coplanar PCBs impaired glucose homeostasis in lean mice and in obese mice following weight loss. Adipose-specific elevations in TNF-α expression by PCBs may contribute to impaired glucose homeostasis.
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Affiliation(s)
- Nicki A Baker
- Graduate Center for Nutritional Sciences, University of Kentucky, Lexington, Kentucky 40536-0200, USA
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Abstract
Obesity is characterized by the accumulation of excess body fat and can be conceptualized as the physical manifestation of chronic energy excess. An important challenge of today's world is that our so-called obesogenic environment is conducive to the consumption of energy and unfavourable to the expenditure of energy. The modern, computer-dependent, sleep-deprived, physically inactive humans live chronically stressed in a society of food abundance. From a physiological standpoint, the excess weight gain observed in prone individuals is perceived as a normal consequence to a changed environment rather than a pathological process. In other words, weight gain is a sign of our contemporary way of living or a 'collateral damage' in the physiological struggle against modernity. Additionally, substantial body fat loss can complicate appetite control, decrease energy expenditure to a greater extent than predicted, increase the proneness to hypoglycaemia and its related risk towards depressive symptoms, increase the plasma and tissue levels of persistent organic pollutants that promote hormone disruption and metabolic complications, all of which are adaptations that can increase the risk of weight regain. In contrast, body fat gain generally provides the opposite adaptations, emphasizing that obesity may realistically be perceived as an a priori biological adaptation for most individuals. Accordingly, prevention and treatment strategies for obesity should ideally target the main drivers or root causes of body fat gain in order to be able to improve the health of the population.
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Affiliation(s)
- J-P Chaput
- Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canada.
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Lee DH, Lind L, Jacobs DR, Salihovic S, van Bavel B, Lind PM. Associations of persistent organic pollutants with abdominal obesity in the elderly: The Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS) study. ENVIRONMENT INTERNATIONAL 2012; 40:170-178. [PMID: 21835469 DOI: 10.1016/j.envint.2011.07.010] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2011] [Revised: 07/15/2011] [Accepted: 07/15/2011] [Indexed: 05/18/2023]
Abstract
OBJECTIVES In animal experiments, persistent organic pollutants (POPs) have induced visceral obesity. To address this possibility in humans, we evaluated associations between POPs and abdominal obesity both cross-sectionally and prospectively. METHODS Twenty-one plasma POPs (16 polychlorinated biphenyl (PCB) congeners, 3 organochlorine (OC) pesticides, 1 brominated diphenyl ether (BDE), and 1 dioxin) were measured at baseline in 970 participants aged 70 years of the Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS), with prospective analyses in 511 participants re-examined after 5 years. Abdominal obesity was defined by an increased waist circumference. RESULTS In the cross-sectional analyses, concentrations of the less chlorinated PCBs, OC pesticides such as p,p'-DDE and dioxin had adjusted odds ratios of 2 to 3 for abdominal obesity. Many relations had inverted U-shapes rather than being linear, particularly in women. In contrast, concentrations of highly chlorinated PCBs were strongly inversely associated with abdominal obesity. In a single model including summary measures of the less chlorinated PCBs, highly chlorinated PCBs, and OC pesticides, both the positive associations and inverse associations strengthened. Similar but somewhat weaker associations were seen between POPs and risk of development of abdominal obesity in the prospective analyses. CONCLUSION Using both a cross-sectional and a prospective design, low-dose exposure to less chlorinated PCBs, p,p'-DDE, and dioxin, were associated with existence or development of abdominal obesity, while highly chlorinated PCBs had an opposite association in an elderly population, despite the previous observation of higher incident diabetes associated with these same PCBs.
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Affiliation(s)
- Duk-Hee Lee
- Department of Preventative Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
| | - Lars Lind
- Acute and Internal Medicine, Department of Medicine, Uppsala University Hospital, Uppsala, Sweden
| | - David R Jacobs
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN, United States; Department of Nutrition, School of Medicine, University of Oslo, Oslo, Norway
| | - Samira Salihovic
- MTM Research Center, School of Science and Technology, Örebro University, Örebro, Sweden
| | - Bert van Bavel
- MTM Research Center, School of Science and Technology, Örebro University, Örebro, Sweden
| | - P Monica Lind
- Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden
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Tremblay A, Chaput JP. Obesity: The allostatic load of weight loss dieting. Physiol Behav 2012; 106:16-21. [DOI: 10.1016/j.physbeh.2011.05.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Revised: 05/11/2011] [Accepted: 05/16/2011] [Indexed: 11/29/2022]
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Lee HS, Lee JC, Lee IK, Moon HB, Chang YS, Jacobs DR, Lee DH. Associations among organochlorine pesticides, Methanobacteriales, and obesity in Korean women. PLoS One 2011; 6:e27773. [PMID: 22114690 PMCID: PMC3219687 DOI: 10.1371/journal.pone.0027773] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 10/25/2011] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Although Methanobacteriales in the gut has recently been linked to obesity, no study has examined the hypothesis that waist circumference, a marker of visceral obesity, are positively associated with Methanobacteriales in the general population. Since Methanobacteriales increase in a petroleum-contaminated environment to biodegrade petroleum as one way of autopurification, we also hypothesized that high body burden of highly lipophilic petroleum-based chemicals like organochlorine pesticides (OCPs) is associated with higher levels of Methanobacteriales in the gut. METHODOLOGY/PRINCIPAL FINDINGS Among 83 Korean women who visited a community health service center for a routine health checkup, quantitative real-time PCR (qPCR) based on 16S rDNA was used to quantify Methanobacteriales in feces. Nine OCPs were measured in both serum and feces of 16 subjects. Methanobacteriales were detected in 32.5% (27/83 women). Both BMI and waist circumference among women with Methanobacteriales were significantly higher than in women without Methanobacteriales (P = 0.04 and P = 0.01, respectively). Also, Methanobacteriales levels in feces were positively associated with BMI and waist circumference (r = +0.23 and P = 0.03 for both). Furthermore, there were significant correlations between feces Methanobacteriales levels and serum concentrations of most OCPs, including with cis-nonachlor (r = +0.53, P<0.05), oxychlordane (r = +0.46, P<0.1), and trans-nonachlor (r = +0.43, P<0.1). Despite high correlations of serum and feces concentrations of most OCPs, feces OCP concentrations were not clearly associated with feces Methanobacteriales levels. CONCLUSION/SIGNIFICANCE In this cross-sectional study, the levels of Methanobacteriales in the human gut were associated with higher body weight and waist circumference. In addition, serum OCP concentrations were positively correlated with levels of Methanobacteriales. There may be a meaningful link among body burden of OCP, Methanobacteriales in the gut, and obesity in the general population.
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Affiliation(s)
- Hae-Sook Lee
- Department of Public Health Graduate School, Kyungpook National University, Daegu, Korea
| | - Je-Chul Lee
- Department of Microbiology, Kyungpook National University School of Medicine, Daegu, Korea
| | - In-Kyu Lee
- Department of Endocrinology, Kyungpook National University School of Medicine, Daegu, Korea
| | - Hyo-Bang Moon
- Department of Environmental Marine Sciences, College of Science and Technology, Hanyang University, Ansan, Korea
| | - Yoon-Seok Chang
- School of Environmental Science and Engineering, POSTECH, Pohang, Korea
| | - David R. Jacobs
- Division of Epidemiology, School of Public Health, University of Minnesota, Minneapolis, Minnesota, United States of America
- Department of Nutrition, University of Oslo, Oslo, Norway
| | - Duk-Hee Lee
- Department of Preventative Medicine, School of Medicine, Kyungpook National University, Daegu, Korea
- * E-mail:
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