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DuPre NC, Hart JE, Bertrand KA, Kraft P, Laden F, Tamimi RM. Residential particulate matter and distance to roadways in relation to mammographic density: results from the Nurses' Health Studies. Breast Cancer Res 2017; 19:124. [PMID: 29169389 PMCID: PMC5701365 DOI: 10.1186/s13058-017-0915-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 11/07/2017] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND High mammographic density is a strong, well-established breast cancer risk factor. Three studies conducted in various smaller geographic settings reported inconsistent findings between air pollution and mammographic density. We assessed whether particulate matter (PM) exposures (PM2.5, PM2.5-10, and PM10) and distance to roadways were associated with mammographic density among women residing across the United States. METHODS The Nurses' Health Studies are prospective cohorts for whom a subset has screening mammograms from the 1990s (interquartile range 1990-1999). PM was estimated using spatio-temporal models linked to residential addresses. Among 3258 women (average age at mammogram 52.7 years), we performed multivariable linear regression to assess associations between square-root-transformed mammographic density and PM within 1 and 3 years before the mammogram. For linear regression estimates of PM in relation to untransformed mammographic density outcomes, bootstrapped robust standard errors are used to calculate 95% confidence intervals (CIs). Analyses were stratified by menopausal status and region of residence. RESULTS Recent PM and distance to roadways were not associated with mammographic density in premenopausal women (PM2.5 within 3 years before mammogram β = 0.05, 95% CI -0.16, 0.27; PM2.5-10 β = 0, 95%, CI -0.15, 0.16; PM10 β = 0.02, 95% CI -0.10, 0.13) and postmenopausal women (PM2.5 within 3 years before mammogram β = -0.05, 95% CI -0.27, 0.17; PM2.5-10 β = -0.01, 95% CI -0.16, 0.14; PM10 β = -0.02, 95% CI -0.13, 0.09). Largely null associations were observed within regions. Suggestive associations were observed among postmenopausal women in the Northeast (n = 745), where a 10-μg/m3 increase in PM2.5 within 3 years before the mammogram was associated with 3.4 percentage points higher percent mammographic density (95% CI -0.5, 7.3). CONCLUSIONS These findings do not support that recent PM or roadway exposures influence mammographic density. Although PM was largely not associated with mammographic density, we cannot rule out the role of PM during earlier exposure time windows and possible associations among northeastern postmenopausal women.
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Affiliation(s)
- Natalie C. DuPre
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA USA
| | - Jaime E. Hart
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA USA
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA USA
| | | | - Peter Kraft
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA USA
| | - Francine Laden
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA USA
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA USA
| | - Rulla M. Tamimi
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA USA
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Yang J, Yu J, Wang P, Luo Y, Yang XF, Yang XS, Li WM, Xu J. The adverse effects of perinatal exposure to nonylphenol on carbohydrate metabolism in male offspring rats. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2017; 27:368-376. [PMID: 28891310 DOI: 10.1080/09603123.2017.1373275] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Accepted: 08/04/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND We sought to investigate the adverse effects of perinatal exposure to nonylphenol (NP) on carbohydrate metabolism of male offspring rats. METHODS Thirty-two healthy pregnant Sprague Dawley rats were randomly divided into four groups, control normal diet group (C), NP normal diet group (NPN), control high-energy diet group (CH), and NP high-energy diet group (NPH). Both of the control groups were received a gavage of corn oil and the NP-groups were received NP (200 mg/kg/day) from gestational days 6 to post-natal day (PND) 21. The concentrations of NP in pancreatic tissues were measured by high-performance liquid chromatography (HPLC). The key genes of glucose metabolism expression were detected by reverse transcription-polymerase chain reaction (RT-PCR). The pancreatic tissues were stained with hematoxylin/eosin (HE). RESULTS On PND 1, the body weights of male pups in the NPN and NPH groups were lower than those of the CH group (p = 0.012 and 0.001, respectively). On PND 30, the body weight of male pups from the NPH group was elevated compared with the C group (p = 0.019), while the body weights of male pups in the NPN and NPH groups were elevated compared to the CH group (p = 0.034 and 0.004, respectively). On PND 60, the body weights of NPN and NPH pups were higher than those in the C (p < 0.001) and CH groups (p < 0.001). The levels of fasting blood glucose (FBG) were increased significantly in the animals treated with NP compared to control animals (F = 29.14, p < 0.001). The FBG levels in the treatment groups are ranked as follows: NPH > NPN > CH > C (p < 0.05). The concentrations of NP in pancreas tissues in both the NPN (2045.0 ± 130.1 μg/L) and NPH groups (2038.0 ± 104.2 μg/L) were higher than those in the C (499.5 ± 27.4 μg/L) and CH groups (494.2 ± 22.4 μg/L; p < 0.05). Morphological examination of tissues from rats exposed to NP shown that the NP-treated groups appeared to have a higher degree of inflammatory injury, edema, and focal necrotic cells in the pancreatic tissues. Compared with C group, expression of glucokinase (GCK) was down-regulated, while Uncoupling protein-2 (UCP-2) was up-regulated in the NP-treated groups (FGCK = 218.89, p < 0.001; FUCP-2 = 18.82, p < 0.001). CONCLUSIONS Prenatal exposure to NP could induce glucose metabolism disorder in male F1 rats, which may be due to the fact that NP induces abnormal expression patterns of GCK and UCP-2.
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Affiliation(s)
- J Yang
- a School of Public Health , Zunyi Medical University , Zunyi , P.R. China
| | - J Yu
- a School of Public Health , Zunyi Medical University , Zunyi , P.R. China
| | - P Wang
- b Department of Nuclear Medicine , Affiliated Hospital of Zunyi Medical University , Zunyi , P.R. China
| | - Y Luo
- a School of Public Health , Zunyi Medical University , Zunyi , P.R. China
| | - X F Yang
- c Department of Gastrointestinal Surgery , Affiliated Hospital of Zunyi Medical University , Zunyi , P.R. China
| | - X S Yang
- a School of Public Health , Zunyi Medical University , Zunyi , P.R. China
| | - W M Li
- a School of Public Health , Zunyi Medical University , Zunyi , P.R. China
| | - J Xu
- a School of Public Health , Zunyi Medical University , Zunyi , P.R. China
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沈 炼, 唐 向, 龙 春, 曹 希, 魏 仪, 王 养, 孙 茫, 周 玥, 刘 洋, 刘 博, 黄 方, 魏 光. [Effect of Di-(2-ethylhcxyl) phthalate exposure on blood-testis barrier integrity in rats]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2017; 37:1178-1182. [PMID: 28951358 PMCID: PMC6765501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To investigate mechanism of di-(2-ethylhcxyl)phthalate (DEHP) exposure in causing blood-testis barrier (BTB) impairment in rats. METHODS Two-months-old male SD rats were randomly divided into corn oil control group and DEHP (750 mg/kg) exposure group for daily intragastic treatment for 30 consecutive days. After the treatments the rats were examined for histomorphological changes of the testicle using HE staining and the expressions of the junction proteins N-cadherin β-catenin, occludin and connexin43 of the BTB using Western blot. In the in vitro study, the vitality and ROS generation level in Sertoli cells exposed to different concentrations of DEHP were examined with MTT and ROS assay kits, respectively, and Nrf2 and p-p38 expressions were detected with Western blot. RESULTS Compared with the control group, the rats with DEHP exposure showed structural damage of the seminiferous tubule and polarity loss of the spermatids. DEHP exposure caused significantly decreased expressions of occludin and connexin43 but increased expressions of N-cadherin and β-catenin in the testicle tissues of the rats (P<0.05). The vitality of Sertoli cells was obviously decreased and ROS level increased significantly after exposure of the cells to increasing concentrations of DEHP, which also resulted in significantly up-regulated Nrf2 and p-p38 expressions (P<0.05). CONCLUSIONS DEHP exposure causes increased oxidative stress in the Sertoli cells of the testis, activates p38 MAPK signaling pathway, and results eventually in impaired spermatogenesis in rats.
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Affiliation(s)
- 炼桔 沈
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 向亮 唐
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 春兰 龙
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 希宁 曹
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 仪 魏
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 养才 王
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 茫 孙
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 玥 周
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 洋 刘
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 博 刘
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 方圆 黄
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
| | - 光辉 魏
- />重庆医科大学附属儿童医院儿科研究所//儿童泌尿生殖发育与组织工程重庆市重点实验室//儿童发育疾病研究教育部重点实验室//儿童发育重大疾病国家国际科技合作基地//儿科学重庆市重点实验室,重庆 400014Department of Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing Key Laboratory of Child Urogenital Development and Tissue Engineering, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders; Chongqing Key Laboratory of Pediatrics Chongqing, 400014, China
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Bisphenol A and estrogen induce proliferation of human thyroid tumor cells via an estrogen-receptor-dependent pathway. Arch Biochem Biophys 2017; 633:29-39. [PMID: 28882636 DOI: 10.1016/j.abb.2017.09.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 08/29/2017] [Accepted: 09/01/2017] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To determine the relationship between papillary thyroid carcinoma and environmental exposure to bisphenol A (BPA) or 17-β estrogen (E2) by assessing the effects of these compounds on estrogen receptor expression and AKT/mTOR signaling. METHODS The effects of low levels of BPA (1mM-10nM) and 17β-estradiol (E2, 0.1mM-1nM) on ER expression and cellular proliferation were determined in human thyroid papillary cancer BHP10-3 cells. Protein and mRNA levels of estrogen nuclear receptors (ERα/ERβ) and membrane receptors (GPR30) were determined by immunofluorescence assay, Western blotting, and RT-PCR, respectively, and proliferation was assessed by CCK-8 assay. RESULTS The proliferative effects of BPA and E2 were both concentration- and time-dependent. Expression of ERα/ERβ and GPR30 were enhanced by BPA and E2. BPA and E2 could quickly phosphorylate AKT/mTOR. Moreover, ICI suppressed ERα expression and activated GPR30 as did G-1. G-15 reversed the effects of E2 on GPR30 and AKT/mTOR, but did not alter the effect of BPA. CONCLUSIONS BPA influences thyroid cancer proliferation by regulating expression of ERs and GPR30, a mechanism that differs from E2. In addition, ICI and G-15 may have the potential to be used as anti-thyroid cancer agents.
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Gray JM, Rasanayagam S, Engel C, Rizzo J. State of the evidence 2017: an update on the connection between breast cancer and the environment. Environ Health 2017; 16:94. [PMID: 28865460 PMCID: PMC5581466 DOI: 10.1186/s12940-017-0287-4] [Citation(s) in RCA: 109] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 07/17/2017] [Indexed: 05/23/2023]
Abstract
BACKGROUND In this review, we examine the continually expanding and increasingly compelling data linking radiation and various chemicals in our environment to the current high incidence of breast cancer. Singly and in combination, these toxicants may have contributed significantly to the increasing rates of breast cancer observed over the past several decades. Exposures early in development from gestation through adolescence and early adulthood are particularly of concern as they re-shape the program of genetic, epigenetic and physiological processes in the developing mammary system, leading to an increased risk for developing breast cancer. In the 8 years since we last published a comprehensive review of the relevant literature, hundreds of new papers have appeared supporting this link, and in this update, the evidence on this topic is more extensive and of better quality than that previously available. CONCLUSION Increasing evidence from epidemiological studies, as well as a better understanding of mechanisms linking toxicants with development of breast cancer, all reinforce the conclusion that exposures to these substances - many of which are found in common, everyday products and byproducts - may lead to increased risk of developing breast cancer. Moving forward, attention to methodological limitations, especially in relevant epidemiological and animal models, will need to be addressed to allow clearer and more direct connections to be evaluated.
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Affiliation(s)
- Janet M. Gray
- Department of Psychology and Program in Science, Technology, and Society, Vassar College, 124 Raymond Avenue, Poughkeepsie, NY 12604-0246 USA
| | - Sharima Rasanayagam
- Breast Cancer Prevention Partners, 1388 Sutter St., Suite 400, San Francisco, CA 94109-5400 USA
| | - Connie Engel
- Breast Cancer Prevention Partners, 1388 Sutter St., Suite 400, San Francisco, CA 94109-5400 USA
| | - Jeanne Rizzo
- Breast Cancer Prevention Partners, 1388 Sutter St., Suite 400, San Francisco, CA 94109-5400 USA
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Bisphenol-A exposure in utero programs a sexually dimorphic estrogenic state of hepatic metabolic gene expression. Reprod Toxicol 2017; 71:84-94. [DOI: 10.1016/j.reprotox.2017.05.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 04/12/2017] [Accepted: 05/01/2017] [Indexed: 01/09/2023]
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Carré J, Gatimel N, Moreau J, Parinaud J, Léandri R. Does air pollution play a role in infertility?: a systematic review. Environ Health 2017; 16:82. [PMID: 28754128 PMCID: PMC5534122 DOI: 10.1186/s12940-017-0291-8] [Citation(s) in RCA: 210] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 07/20/2017] [Indexed: 05/07/2023]
Abstract
BACKGROUND Air pollution is involved in many pathologies. These pollutants act through several mechanisms that can affect numerous physiological functions, including reproduction: as endocrine disruptors or reactive oxygen species inducers, and through the formation of DNA adducts and/or epigenetic modifications. We conducted a systematic review of the published literature on the impact of air pollution on reproductive function. Eligible studies were selected from an electronic literature search from the PUBMED database from January 2000 to February 2016 and associated references in published studies. Search terms included (1) ovary or follicle or oocyte or testis or testicular or sperm or spermatozoa or fertility or infertility and (2) air quality or O3 or NO2 or PM2.5 or diesel or SO2 or traffic or PM10 or air pollution or air pollutants. The literature search was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. We have included the human and animal studies corresponding to the search terms and published in English. We have excluded articles whose results did not concern fertility or gamete function and those focused on cancer or allergy. We have also excluded genetic, auto-immune or iatrogenic causes of reduced reproduction function from our analysis. Finally, we have excluded animal data that does not concern mammals and studies based on results from in vitro culture. Data have been grouped according to the studied pollutants in order to synthetize their impact on fertility and the molecular pathways involved. CONCLUSION Both animal and human epidemiological studies support the idea that air pollutants cause defects during gametogenesis leading to a drop in reproductive capacities in exposed populations. Air quality has an impact on overall health as well as on the reproductive function, so increased awareness of environmental protection issues is needed among the general public and the authorities.
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Affiliation(s)
- Julie Carré
- Médecine de la Reproduction, CHU Toulouse, 31059 Toulouse, France
| | - Nicolas Gatimel
- Médecine de la Reproduction, CHU Toulouse, 31059 Toulouse, France
- Groupe de Recherche en Fertilité Humaine EA 3694, Université Paul Sabatier, 31059 Toulouse, France
| | - Jessika Moreau
- Médecine de la Reproduction, CHU Toulouse, 31059 Toulouse, France
- Groupe de Recherche en Fertilité Humaine EA 3694, Université Paul Sabatier, 31059 Toulouse, France
| | - Jean Parinaud
- Médecine de la Reproduction, CHU Toulouse, 31059 Toulouse, France
- Groupe de Recherche en Fertilité Humaine EA 3694, Université Paul Sabatier, 31059 Toulouse, France
- Médecine de la Reproduction, CHU Paule de Viguier, 330 avenue de Grande Bretagne, 31059 Toulouse, France
| | - Roger Léandri
- Médecine de la Reproduction, CHU Toulouse, 31059 Toulouse, France
- Groupe de Recherche en Fertilité Humaine EA 3694, Université Paul Sabatier, 31059 Toulouse, France
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Mediating Roles of PPARs in the Effects of Environmental Chemicals on Sex Steroids. PPAR Res 2017; 2017:3203161. [PMID: 28819354 PMCID: PMC5551527 DOI: 10.1155/2017/3203161] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 05/23/2017] [Accepted: 06/21/2017] [Indexed: 12/18/2022] Open
Abstract
Peroxisome proliferator-activated receptors (PPARs) are ligand-activated nuclear receptors that are widely involved in various physiological functions. They are widely expressed through the reproductive system. Their roles in the metabolism and function of sex steroids and thus the etiology of reproductive disorders receive great concern. Various kinds of exogenous chemicals, especially environmental pollutants, exert their adverse impact on the reproductive system through disturbing the PPAR signaling pathway. Chemicals could bind to PPARs and modulate the transcription of downstream genes containing PPRE (peroxisome proliferator response element). This will lead to altered expression of genes related to metabolism of sex steroids and thus the abnormal physiological function of sex steroids. In this review, various kinds of environmental ligands are summarized and discussed. Their interactions with three types of PPARs are classified by various data from transcript profiles, PPRE reporter in cell line, in silico docking, and gene silencing. The review will contribute to the understanding of the roles of PPARs in the reproductive toxicology of environmental chemicals.
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Cattani D, Cesconetto PA, Tavares MK, Parisotto EB, De Oliveira PA, Rieg CEH, Leite MC, Prediger RDS, Wendt NC, Razzera G, Filho DW, Zamoner A. Developmental exposure to glyphosate-based herbicide and depressive-like behavior in adult offspring: Implication of glutamate excitotoxicity and oxidative stress. Toxicology 2017; 387:67-80. [PMID: 28627408 DOI: 10.1016/j.tox.2017.06.001] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 05/21/2017] [Accepted: 06/10/2017] [Indexed: 11/18/2022]
Abstract
We have previously demonstrated that maternal exposure to glyphosate-based herbicide (GBH) leads to glutamate excitotoxicity in 15-day-old rat hippocampus. The present study was conducted in order to investigate the effects of subchronic exposure to GBH on some neurochemical and behavioral parameters in immature and adult offspring. Rats were exposed to 1% GBH in drinking water (corresponding to 0.36% of glyphosate) from gestational day 5 until postnatal day (PND)-15 or PND60. Results showed that GBH exposure during both prenatal and postnatal periods causes oxidative stress, affects cholinergic and glutamatergic neurotransmission in offspring hippocampus from immature and adult rats. The subchronic exposure to the pesticide decreased L-[14C]-glutamate uptake and increased 45Ca2+ influx in 60-day-old rat hippocampus, suggesting a persistent glutamate excitotoxicity from developmental period (PND15) to adulthood (PND60). Moreover, GBH exposure alters the serum levels of the astrocytic protein S100B. The effects of GBH exposure were associated with oxidative stress and depressive-like behavior in offspring on PND60, as demonstrated by the prolonged immobility time and decreased time of climbing observed in forced swimming test. The mechanisms underlying the GBH-induced neurotoxicity involve the NMDA receptor activation, impairment of cholinergic transmission, astrocyte dysfunction, ERK1/2 overactivation, decreased p65 NF-κB phosphorylation, which are associated with oxidative stress and glutamate excitotoxicity. These neurochemical events may contribute, at least in part, to the depressive-like behavior observed in adult offspring.
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Affiliation(s)
- Daiane Cattani
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil; Programa de Pós-Graduação em Farmácia, Centro de Ciências da Saúde, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Patrícia Acordi Cesconetto
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil; Programa de Pós-Graduação em Farmácia, Centro de Ciências da Saúde, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Mauren Kruger Tavares
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Eduardo Benedetti Parisotto
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil; Programa de Pós-Graduação em Farmácia, Centro de Ciências da Saúde, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Paulo Alexandre De Oliveira
- Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Carla Elise Heinz Rieg
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil; Programa de Pós-Graduação em Farmácia, Centro de Ciências da Saúde, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Marina Concli Leite
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Rui Daniel Schröder Prediger
- Departamento de Farmacologia, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Nestor Cubas Wendt
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Guilherme Razzera
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Danilo Wilhelm Filho
- Programa de Pós-Graduação em Farmácia, Centro de Ciências da Saúde, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Ariane Zamoner
- Departamento de Bioquímica, Centro de Ciências Biológicas, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil; Programa de Pós-Graduação em Farmácia, Centro de Ciências da Saúde, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil.
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Baek K, Lee N, Chung I. Association of arsenobetaine with beta-cell function assessed by homeostasis model assessment (HOMA) in nondiabetic Koreans: data from the fourth Korea National Health and Nutrition Examination Survey (KNHANES) 2008-2009. Ann Occup Environ Med 2017; 29:31. [PMID: 28702205 PMCID: PMC5504790 DOI: 10.1186/s40557-017-0181-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 06/15/2017] [Indexed: 01/29/2023] Open
Abstract
Background Arsenic is known as an endocrine disruptor that people are exposed to through various sources such as drinking water and indigestion of marine products. Although some epidemiological and animal studies have reported a correlation between arsenic exposure and diabetes development, there are limited studies regarding the toxic effects of organic arsenic including arsenobetaine on the human body. Here, we analyzed the association between urine arsenobetaine and the homeostasis model assessment of β-cell function (HOMA-β), which is an index for predicting diabetes development and reflecting the function of pancreatic β-cells. Methods In the fourth Korea National Health and Nutrition Examination Survey (KNHANES), health and nutrition surveys and screening tests were performed. Of the total survey population, people with confirmed values for urine total arsenic and arsenobetaine were included, and known diabetic patients were excluded. A total 369 participants were finally included in the study. We collected surveys on health, height, body weight, body mass index, blood mercury level, fasting glucose level, and serum insulin level and calculated HOMA index. Owing to sexual discrepancy, we performed sexually stratified analysis. Results Urine total arsenic and total arsenic minus arsenobetaine was not associated with HOMA-IR and HOMA-β in univariate analysis or in sexually stratified analysis. However, urine arsenobetaine showed a statistically significant relationship with HOMA-β in univariate analysis, and only male participants showed a significant correlation in sexually stratified analysis. In the analysis adjusted for age, BMI, smoking, alcohol drinking, physical activity and blood mercury, the HOMA-β value in the group below the 25th percentile of arsenobetaine was significantly higher than the group between 50 and 75th percentile, while no difference was shown for HOMA-IR. In sexually stratified analysis, The value of HOMA-β was significantly higher in male participants with below the 25th percentile urine arsenobetaine than the group between 25 and 50th and between 50 and 75th, while no difference was shown for HOMA-IR. However, female participants did not demonstrate a relationship between HOMA–IR, HOMA-β and urine arsenobetaine. Conclusion This study revealed the association between urine arsenobetaine and pancreatic β-cell function assessed by HOMA-β in the normal population (without diabetes), especially in males, despite adjusting for factors affecting pancreatic β-cell function and diabetes. Electronic supplementary material The online version of this article (doi:10.1186/s40557-017-0181-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kiook Baek
- Division of Occupational and Environmental Medicine, Keimyung University Dongsan Medical Center, Daegu, South Korea
| | - Namhoon Lee
- Division of Occupational and Environmental Medicine, Keimyung University Dongsan Medical Center, Daegu, South Korea
| | - Insung Chung
- Division of Occupational and Environmental Medicine, Keimyung University Dongsan Medical Center, Daegu, South Korea.,Department of Preventive Medicine, Keimyung University School of Medicine, Daegu, South Korea
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211
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Vijaykumar T, Singh D, Vanage GR, Dhumal RV, Dighe VD. Bisphenol A-induced ultrastructural changes in the testes of common marmoset. Indian J Med Res 2017; 146:126-137. [PMID: 29168469 DOI: 10.4103/ijmr_927_15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023] Open
Abstract
BACKGROUND & OBJECTIVES Bisphenol A (BPA) is an endocrine disruptor that is widely used in the manufacture of polycarbonate plastics, epoxy resins and dental sealants. It is known to have adverse effects on spermatogenesis in rodents. This study was aimed to evaluate the effects of BPA in adult common marmoset owing to its similarities with human spermatogenesis. METHODS Sixteen marmosets were divided into four groups (n=4 per group) and given oral doses of BPA (2.5, 12.5 and 25 μg/kg BW/day) for 70 days to cover two spermatogenic cycles, and the control group received only vehicle (honey). Testes were processed for histological and transmission electron microscopy studies. RESULTS Histology of the testis showed sloughing of germ cells into the lumen, increase in interstitial space and vacuolation of Sertoli cell cytoplasm. Ultrastructural analysis of the testis revealed several degenerative effects on the basement membrane, Sertoli cells, Leydig cells and other developing germ cells in the 12.5 and 25 μg/kg BW/day groups as compared to control. INTERPRETATION & CONCLUSIONS The observed ultrastructural changes caused by BPA in testicular morphology might be indicative of a perturbed sperm production. Considering the genetic and spermatogenic similarities of common marmoset (Callithrix jacchus) and humans, the study findings are of significance. Further studies are, however, needed to elucidate the mechanism of action.
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Affiliation(s)
- Tushara Vijaykumar
- National Centre for Preclinical Reproductive & Genetic Toxicology, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Dipty Singh
- National Centre for Preclinical Reproductive & Genetic Toxicology, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Geeta R Vanage
- National Centre for Preclinical Reproductive & Genetic Toxicology, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Rohit V Dhumal
- National Centre for Preclinical Reproductive & Genetic Toxicology, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
| | - Vikas D Dighe
- National Centre for Preclinical Reproductive & Genetic Toxicology, ICMR-National Institute for Research in Reproductive Health, Mumbai, India
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212
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Yang TC, Peterson KE, Meeker JD, Sánchez BN, Zhang Z, Cantoral A, Solano M, Tellez-Rojo MM. Bisphenol A and phthalates in utero and in childhood: association with child BMI z-score and adiposity. ENVIRONMENTAL RESEARCH 2017; 156:326-333. [PMID: 28390300 PMCID: PMC5482500 DOI: 10.1016/j.envres.2017.03.038] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 03/24/2017] [Accepted: 03/26/2017] [Indexed: 05/19/2023]
Abstract
OBJECTIVE To assess the relationship between in utero and concurrent child urinary exposures to bisphenol A (BPA) and phthalates with BMI z-score, waist circumference, and sum of triceps and subscapular skinfold thickness in Mexican children. METHODS Among participants (N=249) from the Early Life Exposure in Mexico to ENvironmental Toxicants study, we evaluated associations between maternal third trimester and concurrent urinary BPA and individual and summed phthalates metabolites (∑Di(2-ethylhexyl phthalate), ∑high molecular weight, ∑low molecular weight) with measures of weight status and adiposity in children aged 8-14 years. Linear regressions with specific-gravity corrected and natural log-transformed urinary concentrations were estimated, adjusting for covariates. Effect modification by sex was explored. RESULTS Prenatal urinary exposure to monobenzyl phthalate (MBzP) was inversely associated with child's BMI z-score (β=-0.21, 95%CI: -0.41, -0.02) and child urinary exposure to mono(2-ethylhexyl)phthalate (MEHP) was inversely associated with waist circumference (β=-1.85, 95%CI: -3.36, -0.35) and sum of skinfold thicknesses (β=-2.08, 95%CI: -3.80, -0.37) after adjusting for confounders. In the childhood exposure period, sex modified the relationships with BPA, MEHP, MBzP, monoethyl phthalate (MEP), mono(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), mono(2-ethyl-5-oxohexyl) phthalate (MEOHP), and mono(2-ethyl-5-carboxypentyl) phthalate (MECPP). In girls, increased BPA exposure was positively associated with sum of skinfold thickness (β=3.47, 95%CI: 0.05, 6.40) while increased MEHP was inversely associated with sum of skinfold thicknesses in boys (β=-2.95, 95%CI: -5.08, -0.82); these results remained in sensitivity analyses after excluding children who had initiated pubertal development (Tanner stage >1 for pubic hair). We did not observe relationships between summed phthalates metabolites at any exposure period with outcome measures. CONCLUSION Our results identified associations between urinary BPA and phthalates metabolites with measures of weight status and adiposity that differed by timing of exposure, sex, and pubertal status. Additional studies are needed to explore how associations may differ between those who are pre- and post-pubertal.
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Affiliation(s)
- Tiffany C Yang
- Department of Nutritional Sciences, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, MI 48109, USA; Department of Health Sciences, University of York, Heslington, York YO10 5DD, United Kingdom
| | - Karen E Peterson
- Department of Nutritional Sciences, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, MI 48109, USA; Center for Human Growth and Development, University of Michigan, 300 North Ingalls St., Ann Arbor, MI 48109, USA.
| | - John D Meeker
- Department of Environmental Health Sciences, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, MI 48109, USA
| | - Brisa N Sánchez
- Department of Biostatistics, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, MI 48109, USA
| | - Zhenzhen Zhang
- Department of Nutritional Sciences, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, MI 48109, USA; Department of Biostatistics, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, MI 48109, USA
| | - Alejandra Cantoral
- Centro de Investigación en Nutrición y Salud, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | - Maritsa Solano
- Centro de Investigación en Nutrición y Salud, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | - Martha M Tellez-Rojo
- Centro de Investigación en Nutrición y Salud, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
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213
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Karačonji IB, Jurica SA, Lasić D, Jurica K. Facts about phthalate toxicity in humans and their occurrence in alcoholic beverages. Arh Hig Rada Toksikol 2017; 68:81-92. [DOI: 10.1515/aiht-2017-68-2951] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 06/01/2017] [Indexed: 11/15/2022] Open
Abstract
Abstract
Phthalates are esters of phthalic acid and aliphatic alcohol added to plastic to improve its softness, flexibility, and extensibility. They easily migrate from plastic products into the environment because of their physical and chemical properties. This review summarises their characteristics, distribution in the environment, monitoring, use, toxic effects on human health, regulatory limits in different matrices and products, and tolerable daily intake. The studies we have reviewed suggest that phthalates have a potential to affect reproduction and development in humans. Due to the inconsistent data, further studies are needed and, in the meantime, precautionary policies must be implemented. Here we draw attention to the methods of determining phthalate levels in alcoholic beverages and reported levels in plum spirits produced in Croatia. Legally produced and moderately consumed plum spirits do not seem to increase the risk of phthalate toxicity for human health. We conclude with recommendations for the effective monitoring of phthalate exposure in humans and for the implementation of alternative materials in alcohol production.
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Affiliation(s)
- Irena Brčić Karačonji
- Analytical Toxicology and Mineral Metabolism Unit, Institute for Medical Research and Occupational Health, Zagreb , Croatia
| | - Sonja Anić Jurica
- Department of Gynaecology and Obstetrics, University Hospital Centre Zagreb, Zagreb , Croatia
| | - Dario Lasić
- Department of Environmental Protection and Health Ecology, Andrija Štampar Teaching Institute of Public Health, Zagreb , Croatia
| | - Karlo Jurica
- PhD, Ministry of the Interior, Ulica grada Vukovara 33, 10000 Zagreb , Croatia
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214
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Zhao W, Cui R, Wang J, Dai J. Inhibition effects of perfluoroalkyl acids on progesterone production in mLTC-1. J Environ Sci (China) 2017; 56:272-280. [PMID: 28571864 DOI: 10.1016/j.jes.2016.08.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 07/26/2016] [Accepted: 08/11/2016] [Indexed: 06/07/2023]
Abstract
Perfluoroalkyl substances (PFASs) are a class of fluorine substituted carboxylic acid, sulfonic acid and alcohol, structurally similar to their corresponding parent compounds. Previous study demonstrated the potential endocrine disruption and reproductive toxicity of perfluorooctane sulfonic acid and perfluorooctanoic acid, two dominant PFASs in animals and humans. We explored the relationship between eleven perfluoroalkyl acids (PFAAs) with different carbon chain length and their ability to inhibit progesterone production in mouse Leydig tumor cells (mLTC-1). We found an obvious dose-response relationship between progesterone inhibition rate and PFAA exposure concentration in mLTC-1. The relative inhibition rate of progesterone by PFAAs was linearly related to the carbon chain length and molar refractivity of PFAAs. Mitochondrial membrane potential (MMP) decreased after PFAA exposure at the half-maximal inhibitory effect concentration (IC50) of progesterone production in mLTC-1, while the reactive oxygen species (ROS) content increased significantly. These results imply that the inhibition effect of PFAAs on progesterone production might be due, in part, to ROS damage and the decrease in MMP in mLTC-1.
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Affiliation(s)
- Wei Zhao
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Ruina Cui
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jianshe Wang
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Jiayin Dai
- Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
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215
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Baravalle R, Ciaramella A, Baj F, Di Nardo G, Gilardi G. Identification of endocrine disrupting chemicals acting on human aromatase. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2017; 1866:88-96. [PMID: 28578073 DOI: 10.1016/j.bbapap.2017.05.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 05/27/2017] [Accepted: 05/29/2017] [Indexed: 01/28/2023]
Abstract
Human aromatase is the cytochrome P450 catalysing the conversion of androgens into estrogens playing a key role in the endocrine system. Due to this role, it is likely to be a target of the so-called endocrine disrupting chemicals, a series of compounds able to interfere with the hormone system with toxic effects. If on one side the toxicity of some compounds such as bisphenol A is well known, on the other side the toxic concentrations of such compounds as well as the effect of the many other molecules that are in contact with us in everyday life still need a deep investigation. The availability of biological assays able to detect the interaction of chemicals with key molecular targets of the endocrine system represents a possible solution to identify potential endocrine disrupting chemicals. Here the so-called alkali assay previously developed in our laboratory is applied to test the effect of different compounds on the activity of human aromatase. The assay is based on the detection of the alkali product that forms upon strong alkali treatment of the NADP+ released upon enzyme turnover. Here it is applied on human aromatase and validated using anastrozole and sildenafil as known aromatase inhibitors. Out of the small library of compounds tested, resveratrol and ketoconazole resulted to inhibit aromatase activity, while bisphenol A and nicotine were found to exert an inhibitory effect at relatively high concentrations (100μM), and other molecules such as lindane and four plasticizers did not show any significant effect. These data are confirmed by quantification of the product estrone in the same reaction mixtures through ELISA. Overall, the results show that the alkali assay is suitable to screen for molecules that interfere with aromatase activity. As a consequence it can also be applied to other molecular targets of EDCs that use NAD(P)H for catalysis in a high throughput format for the fast screening of many different compounds as endocrine disrupting chemicals. This article is part of a Special Issue entitled: Cytochrome P450 biodiversity and biotechnology, edited by Erika Plettner, Gianfranco Gilardi, Luet Wong, Vlada Urlacher, Jared Goldstone.
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Affiliation(s)
- Roberta Baravalle
- Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, Torino, Italy
| | - Alberto Ciaramella
- Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, Torino, Italy
| | - Francesca Baj
- Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, Torino, Italy
| | - Giovanna Di Nardo
- Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, Torino, Italy
| | - Gianfranco Gilardi
- Department of Life Sciences and Systems Biology, University of Torino, Via Accademia Albertina 13, Torino, Italy.
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216
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Chatterjee A, Chatterji U. All-Trans Retinoic Acid Ameliorates Arsenic-Induced Oxidative Stress and Apoptosis in the Rat Uterus by Modulating MAPK Signaling Proteins. J Cell Biochem 2017; 118:3796-3809. [PMID: 28374919 DOI: 10.1002/jcb.26029] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Accepted: 04/03/2017] [Indexed: 12/19/2022]
Abstract
Exposure to arsenic leads to inhibition of the anti-oxidant defense mechanism of the body. Reactive oxygen species generated in response to arsenic causes reproductive failures in exposed females and also acts as an inducer of apoptosis. As a prospective remedial agent, all-trans retinoic acid (ATRA) was assessed for reversing arsenic-induced oxidative stress and apoptosis. Rats exposed to arsenic for 28 days were allowed to recover naturally or were treated simultaneously with ATRA for 28 days or up to 56 days. Production of H2 O2 was detected using 2',7'-dichlorfluorescein diacetate (DCFCA) by flow cytometry. Catalase, superoxide dismutase, glutathione, ALT, and AST were estimated by biochemical assays and Western blot analyses. Detection of apoptosis was performed using annexin V-FITC/propidium iodide. Expressions of p53, p21, cleaved caspase 3, JNK/pJNK, and ERK/pERK levels were estimated using Western blot analysis. Elemental arsenic deposition in the rat uterus and liver was estimated by atomic absorption spectrophotometry. Our results confirmed that ATRA ameliorated sodium arsenite-induced ROS generation, restored redox balance, and prevented apoptosis. Concomitant recovery was observed to be more prominent for ATRA-treated rats as compared to the rats that were allowed to recover naturally for 56 days. Tissue arsenic deposition was significantly reduced in the uterus upon continuous ATRA treatment. The results revealed that ATRA reversed arsenic-induced free radical generation, activated the anti-oxidant defence system, and subsequently repressed p53-dependent apoptosis through inhibition of the MAPK signaling components. J. Cell. Biochem. 118: 3796-3809, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Aniruddha Chatterjee
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700 019, India
| | - Urmi Chatterji
- Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700 019, India
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217
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The endocrine disrupting alkylphenols and 4,4'-DDT interfere with estrogen conversion and clearance by mouse liver cytosol. Reprod Biol 2017; 17:185-192. [PMID: 28532594 DOI: 10.1016/j.repbio.2017.04.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 04/19/2017] [Accepted: 04/24/2017] [Indexed: 12/31/2022]
Abstract
Endocrine disrupting chemicals (EDCs) are ubiquitous compounds known for negative impacts on reproductive functions and for increasing cancer risk. EDCs are believed to cause the harmful effects in part through their inappropriate low-affinity binding to steroid receptors and other possible non-receptor mediated paradigms, however there is a need to further elucidate other mechanisms involving the direct and indirect impact of EDCs on reproductive functions. We examined the metabolism of 17β-estradiol (E2) and estrone (E1) by cell-free hepatic cytosol in the presence of alkylphenols (nonylphenol/NP and 4-tert-octylphenol/tOP), Dichlorodiphenyltrichloroethane (4,4'-DDT) and other EDCs. Tandem liquid chromatography mass spectrometry was utilized to quantitatively assess the impact of each EDC on estrogen clearance, inter-conversions and downstream metabolism by mouse liver cytosol. The results revealed that NP and tOP (0.1-3μg/mL) significantly reduced the hepatic cytosol clearance and biotransformation of estrogens with inclination for accumulating E2, the stronger estrogen form, than E1. Alkylphenols also caused up to a 34-fold increase in the E2/E1 ratio possibly by suppressing the hepatic E2→E1 conversion by 17β-hydroxysteroid dehydrogenase (17βHSD) types 2, 4 while displaying a weaker inhibition of E1→E2 conversion by type 1, 17βHSD. On the other hand, the pesticide 4,4'-DDT was a weaker inhibitor of clearance of estrogens by the cytosol preparations when compared to alkylphenols, whereas chemicals such as phthalates and atrazine were ineffective. Our data suggest that exposure to NP, tOP and DDT can indirectly increase the estrogenic load by suppressing the hepatic clearance of estrogens and by elevating the E2/1 ratio and could therefore increase the risk of reproductive lesions.
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218
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Huang JV, Leung GM, Schooling CM. The Association of Air Pollution With Pubertal Development: Evidence From Hong Kong's "Children of 1997" Birth Cohort. Am J Epidemiol 2017; 185:914-923. [PMID: 28444106 DOI: 10.1093/aje/kww200] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 04/20/2016] [Indexed: 12/20/2022] Open
Abstract
Many pollutants are endocrine disruptors with impacts on reproduction and health in animals, but evidence in humans, of which sex-specific effects on pubertal development may be an indicator, is less clear. We examined the association of air pollution in utero and during early life with pubertal development in Hong Kong, China, an area with a high level of air pollution compared with other similarly developed cities. We assessed sex-specific associations of particulate matter less than or equal to 10 μm in diameter (PM10), nitric oxide, sulfur dioxide, and nitrogen dioxide in different growth phases with clinically assessed pubertal stage at approximately age 11 years (as indicated by Tanner stage) in a large population-representative birth cohort, the "Children of 1997." We used partial least squares regression to account for colinearity between air pollutants. Among 1,938 girls, PM10 exposure in utero and during infancy was negatively associated with pubertal stage and breast development, whereas among 2,136 boys, sulfur dioxide and nitrogen dioxide exposure in utero, during infancy, and in childhood were negatively associated with pubertal stage. These sex-specific associations with pubertal development are consistent with endocrine-disrupting effects. Given the health impact of altered pubertal timing, further investigation across the life course may help quantify the full effects and the corresponding need for preventive measures.
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219
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Alexander M, Koutros S, Bonner MR, Barry KH, Alavanja MC, Andreotti G, Byun HM, Chen L, Beane Freeman LE, Hofmann JN, Kamel F, Moore LE, Baccarelli A, Rusiecki J. Pesticide use and LINE-1 methylation among male private pesticide applicators in the Agricultural Health Study. ENVIRONMENTAL EPIGENETICS 2017; 3:dvx005. [PMID: 29492307 PMCID: PMC5804545 DOI: 10.1093/eep/dvx005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 02/24/2017] [Accepted: 03/13/2017] [Indexed: 05/05/2023]
Abstract
Cancer risk may be associated with DNA methylation (DNAm) levels in Long Interspersed Nucleotide Element 1 (LINE-1), a surrogate for global DNAm. Exposure to certain pesticides may increase risk of particular cancers, perhaps mediated in part through global DNAm alterations. To date, human data on pesticide exposure and global DNAm alterations are limited. The goal of this study was to evaluate alterations of LINE-1 DNAm by pesticides in a variety of classes. Data from 596 cancer-free male participants enrolled in the Agricultural Health Study (AHS) were used to examine associations between use of 57 pesticides and LINE-1 DNAm measured via Pyrosequencing in peripheral blood leucocytes. Participants provided information on pesticide use at three contacts between 1993 and 2010. Associations of ever/never pesticide use and lifetime days of application (years of use × days per year) and LINE-1 DNAm level were assessed using linear regression, adjusting for potential confounders (race, age at blood draw, and frequency of drinking alcohol) and other moderately correlated pesticides. After adjustment, ever application of 10 pesticides was positively associated and ever application of eight pesticides was negatively associated with LINE-1 DNAm. In dose-response analyses, increases in five pesticides (imazethapyr, fenthion, EPTC, butylate, and heptachlor) were associated with increasing LINE-1 DNAm (ptrend < 0.05) and increases in three pesticides (carbaryl, chlordane, and paraquat) were associated with decreasing LINE-1 DNAm (ptrend < 0.05). This study provides some mechanistic insight into the pesticide-cancer relationship, which may be mediated in part by epigenetics.
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Affiliation(s)
- Melannie Alexander
- Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD, USA
| | - Stella Koutros
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Matthew R. Bonner
- Department of Epidemiology and Environmental Health, State University of New York, Buffalo, NY, USA
| | - Kathryn Hughes Barry
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
- Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA
- Program in Oncology, University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center, Baltimore, MD, USA
| | - Michael C.R. Alavanja
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Gabriella Andreotti
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Hyang-Min Byun
- Institute of Cellular Medicine, Newcastle University, Newcastle, UK
| | - Ligong Chen
- Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD, USA
| | - Laura E. Beane Freeman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Jonathan N. Hofmann
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Freya Kamel
- Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | - Lee E. Moore
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Andrea Baccarelli
- Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Jennifer Rusiecki
- Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD, USA
- Correspondence address. Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA. Tel: 301-295-3712; Fax: 301-295-1933; E-mail:
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de Souza JS, Kizys MML, da Conceição RR, Glebocki G, Romano RM, Ortiga-Carvalho TM, Giannocco G, da Silva IDCG, Dias da Silva MR, Romano MA, Chiamolera MI. Perinatal exposure to glyphosate-based herbicide alters the thyrotrophic axis and causes thyroid hormone homeostasis imbalance in male rats. Toxicology 2017; 377:25-37. [PMID: 27916585 DOI: 10.1016/j.tox.2016.11.005] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/31/2016] [Accepted: 11/03/2016] [Indexed: 12/11/2022]
Abstract
Glyphosate-based herbicides (GBHs) are widely used in agriculture. Recently, several animal and epidemiological studies have been conducted to understand the effects of these chemicals as an endocrine disruptor for the gonadal system. The aim of the present study was to determine whether GBHs could also disrupt the hypothalamic-pituitary-thyroid (HPT) axis. Female pregnant Wistar rats were exposed to a solution containing GBH Roundup®Transorb (Monsanto). The animals were divided into three groups (control, 5mg/kg/day or 50mg/kg/day) and exposed from gestation day 18 (GD18) to post-natal day 5 (PND5). Male offspring were euthanized at PND 90, and blood and tissues samples from the hypothalamus, pituitary, liver and heart were collected for hormonal evaluation (TSH-Thyroid stimulating hormone, T3-triiodothyronine and T4-thyroxine), metabolomic and mRNA analyses of genes related to thyroid hormone metabolism and function. The hormonal profiles showed decreased concentrations of TSH in the exposed groups, with no variation in the levels of the thyroid hormones (THs) T3 and T4 between the groups. Hypothalamus gene expression analysis of the exposed groups revealed a reduction in the expression of genes encoding deiodinases 2 (Dio2) and 3 (Dio3) and TH transporters Slco1c1 (former Oatp1c1) and Slc16a2 (former Mct8). In the pituitary, Dio2, thyroid hormone receptor genes (Thra1 and Thrb1), and Slc16a2 showed higher expression levels in the exposed groups than in the control group. Interestingly, Tshb gene expression did not show any difference in expression profile between the control and exposed groups. Liver Thra1 and Thrb1 showed increased mRNA expression in both GBH-exposed groups, and in the heart, Dio2, Mb, Myh6 (former Mhca) and Slc2a4 (former Glut4) showed higher mRNA expression in the exposed groups. Additionally, correlation analysis between gene expression and metabolomic data showed similar alterations as detected in hypothyroid rats. Perinatal exposure to GBH in male rats modified the HPT set point, with lower levels of TSH likely reflecting post-translational events. Several genes regulated by TH or involved in TH metabolism and transport presented varying degrees of gene expression alteration that were probably programmed during intrauterine exposure to GBHs and reflects in peripheral metabolism. In conclusion, the role of GBH exposure in HPT axis disruption should be considered in populations exposed to this herbicide.
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Affiliation(s)
- Janaina Sena de Souza
- Universidade Federal de São Paulo, Unifesp/EPM, Departamento de Medicina, Disciplina de Endocrinologia Clínica, Laboratório de Endocrinologia Molecular e Translacional (LEMT), São Paulo, Brazil
| | - Marina Malta Letro Kizys
- Universidade Federal de São Paulo, Unifesp/EPM, Departamento de Medicina, Disciplina de Endocrinologia Clínica, Laboratório de Endocrinologia Molecular e Translacional (LEMT), São Paulo, Brazil
| | - Rodrigo Rodrigues da Conceição
- Universidade Federal de São Paulo, Unifesp/EPM, Departamento de Medicina, Disciplina de Endocrinologia Clínica, Laboratório de Endocrinologia Molecular e Translacional (LEMT), São Paulo, Brazil
| | - Gabriel Glebocki
- Universidade Federal de São Paulo, Unifesp/EPM, Departamento de Medicina, Disciplina de Endocrinologia Clínica, Laboratório de Endocrinologia Molecular e Translacional (LEMT), São Paulo, Brazil
| | - Renata Marino Romano
- Universidade Estadual do Centro-Oeste, Departamento de Farmácia, Guarapuava, Brazil
| | - Tania Maria Ortiga-Carvalho
- Universidade Federal do Rio de Janeiro, UFRJ, Instituto de Biofísica Carlos Chagas Filho, Laboratório de Endocrinologia Translacional, Rio de Janeiro, Brazil
| | - Gisele Giannocco
- Universidade Federal de São Paulo, Unifesp/EPM, Departamento de Medicina, Disciplina de Endocrinologia Clínica, Laboratório de Endocrinologia Molecular e Translacional (LEMT), São Paulo, Brazil
| | | | - Magnus Regios Dias da Silva
- Universidade Federal de São Paulo, Unifesp/EPM, Departamento de Medicina, Disciplina de Endocrinologia Clínica, Laboratório de Endocrinologia Molecular e Translacional (LEMT), São Paulo, Brazil
| | - Marco Aurélio Romano
- Universidade Estadual do Centro-Oeste, Departamento de Farmácia, Guarapuava, Brazil
| | - Maria Izabel Chiamolera
- Universidade Federal de São Paulo, Unifesp/EPM, Departamento de Medicina, Disciplina de Endocrinologia Clínica, Laboratório de Endocrinologia Molecular e Translacional (LEMT), São Paulo, Brazil.
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Perez APS, Biancardi MF, Caires CRS, Falleiros LR, Góes RM, Santos FCA, Taboga SR. Pubertal exposure to ethinylestradiol promotes different effects on the morphology of the prostate of the male and female gerbil during aging. ENVIRONMENTAL TOXICOLOGY 2017; 32:477-489. [PMID: 26945824 DOI: 10.1002/tox.22252] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 02/02/2016] [Accepted: 02/06/2016] [Indexed: 06/05/2023]
Abstract
In rodents, the final growth and maturation of the prostate occur at puberty, a crucial period for prostate development. The present study is a serological, morphological, morphometric, and immunohistochemical analysis of the effects of exposure to ethinylestradiol (EE) (15 µg/kg/day) during puberty (EE/PUB group) on the male ventral and female prostate in senile gerbils. In the study, male and female gerbils (Meriones unguiculatus) (42 days) received by gavage 15 μg/kg/day of EE (a component of the contraceptive pill), diluted in 100 µL of Nujol® for 1 week (EE/PUB group). In the control group, males and females were not treated. Animals were killed (n = 5) after 12 months in the experimental groups. In the senile male in the EE/PUB group, we observed a reduction in testosterone levels and a decrease in the prostatic epithelial thickness, as well as in the thickness of the muscle layer. In addition, an increase in PIN multiplicity and prostatic inflammation was observed. In the senile female in the EE/PUB group, we observed increased testosterone and estradiol levels, an enhanced prostatic epithelial thickness and an increase in the thickness of the muscle layer. Immunohistochemical analysis revealed an increase in positive cells (%) for AR and PCNA in the male prostate and an increase in positive basal cells for p63 in the female prostate of the EE/PUB group. Exposure to EE during puberty resulted in an inhibitory action on the male ventral prostate and an anabolic effect on the female prostate in senile gerbils. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 477-489, 2017.
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Affiliation(s)
- Ana P S Perez
- Department of Structural and Functional Biology, Institute of Biology, UNICAMP, CP 6109, Campinas, São Paulo, 13084-864, Brazil
- Special Institute of Health Sciences, Medicine Course, Federal University of Goiás, Jataí, Goiás, 75804-020
| | - Manoel F Biancardi
- Department of Structural and Functional Biology, Institute of Biology, UNICAMP, CP 6109, Campinas, São Paulo, 13084-864, Brazil
| | - Cássia R S Caires
- Department of Biology, Laboratory of Microscopy and Microanalysis, IBILCE, University of Estadual Paulista-UNESP, São José Do Rio Preto, São Paulo, 15054-000, Brazil
| | - Luiz R Falleiros
- Department of Biology, Laboratory of Microscopy and Microanalysis, IBILCE, University of Estadual Paulista-UNESP, São José Do Rio Preto, São Paulo, 15054-000, Brazil
| | - Rejane M Góes
- Department of Structural and Functional Biology, Institute of Biology, UNICAMP, CP 6109, Campinas, São Paulo, 13084-864, Brazil
- Department of Biology, Laboratory of Microscopy and Microanalysis, IBILCE, University of Estadual Paulista-UNESP, São José Do Rio Preto, São Paulo, 15054-000, Brazil
| | - Fernanda C A Santos
- Department of Morphology, Federal University of Goiás, Goiânia, Goiás, 74001-970, Brazil
| | - Sebastião R Taboga
- Department of Structural and Functional Biology, Institute of Biology, UNICAMP, CP 6109, Campinas, São Paulo, 13084-864, Brazil
- Department of Biology, Laboratory of Microscopy and Microanalysis, IBILCE, University of Estadual Paulista-UNESP, São José Do Rio Preto, São Paulo, 15054-000, Brazil
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222
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Smith JT, Schneider AD, Katchko KM, Yun C, Hsu EL. Environmental Factors Impacting Bone-Relevant Chemokines. Front Endocrinol (Lausanne) 2017; 8:22. [PMID: 28261155 PMCID: PMC5306137 DOI: 10.3389/fendo.2017.00022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 01/25/2017] [Indexed: 01/07/2023] Open
Abstract
Chemokines play an important role in normal bone physiology and the pathophysiology of many bone diseases. The recent increased focus on the individual roles of this class of proteins in the context of bone has shown that members of the two major chemokine subfamilies-CC and CXC-support or promote the formation of new bone and the remodeling of existing bone in response to a myriad of stimuli. These chemotactic molecules are crucial in orchestrating appropriate cellular homing, osteoblastogenesis, and osteoclastogenesis during normal bone repair. Bone healing is a complex cascade of carefully regulated processes, including inflammation, progenitor cell recruitment, differentiation, and remodeling. The extensive role of chemokines in these processes and the known links between environmental contaminants and chemokine expression/activity leaves ample opportunity for disruption of bone healing by environmental factors. However, despite increased clinical awareness, the potential impact of many of these environmental factors on bone-related chemokines is still ill defined. A great deal of focus has been placed on environmental exposure to various endocrine disruptors (bisphenol A, phthalate esters, etc.), volatile organic compounds, dioxins, and heavy metals, though mainly in other tissues. Awareness of the impact of other less well-studied bone toxicants, such as fluoride, mold and fungal toxins, asbestos, and chlorine, is also reviewed. In many cases, the literature on these toxins in osteogenic models is lacking. However, research focused on their effects in other tissues and cell lines provides clues for where future resources could be best utilized. This review aims to serve as a current and exhaustive resource detailing the known links between several classes of high-interest environmental pollutants and their interaction with the chemokines relevant to bone healing.
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Affiliation(s)
- Justin T. Smith
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA
| | - Andrew D. Schneider
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA
| | - Karina M. Katchko
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA
| | - Chawon Yun
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA
| | - Erin L. Hsu
- Department of Orthopaedic Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA
- *Correspondence: Erin L. Hsu,
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223
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Sghaier RB, Net S, Ghorbel-Abid I, Bessadok S, Le Coz M, Hassan-Chehimi DB, Trabelsi-Ayadi M, Tackx M, Ouddane B. Simultaneous Detection of 13 Endocrine Disrupting Chemicals in Water by a Combination of SPE-BSTFA Derivatization and GC-MS in Transboundary Rivers (France-Belgium). WATER, AIR, & SOIL POLLUTION 2017. [PMID: 0 DOI: 10.1007/s11270-016-3195-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
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224
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Techer D, Milla S, Fontaine P, Viot S, Thomas M. Influence of waterborne gallic and pelargonic acid exposures on biochemical and reproductive parameters in the zebrafish (Danio rerio). ENVIRONMENTAL TOXICOLOGY 2017; 32:227-240. [PMID: 26677111 DOI: 10.1002/tox.22228] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 11/26/2015] [Indexed: 06/05/2023]
Abstract
Gallic and pelargonic acids are biologically derived substances receiving a growing interest as eco-friendly biocides with potential applications in freshwater system management. However, some data gaps remain to address their chronic ecotoxicity issue, particularly for fish. This work aimed at investigating the sublethal effects of a long-term waterborne exposure of zebrafish to these compounds. Mature fish were exposed to gallic or pelargonic acid at the concentrations of 0, 0.05, 0.5 and 5 mg/L during one month under semi-static conditions. Fecundity, hatching rate and median hatching time were regularly evaluated. Circulating sex hormone levels (11 ketotestosterone -11 KT, 17 βestradiol -E2-), plasma vitellogenin (Vtg), and gonad histology were monitored in males and females after exposure. Lactate dehydrogenase (LDH), total glutathione peroxydase (GPx) and glutathione-S transferase (GST) activities were assessed as enzymatic biomarkers of exposure in fish liver. Significant increases of GPx activity were reported in females exposed to both type of chemicals regardless the contamination level. Moreover, 5 mg/L gallic acid induced a decrease in 11-KT levels for males. For fish exposed to pelargonic acid, decreases in circulating hormone levels were reported respectively at 0.05 and 5 mg/L for 11-KT in males, and at 0.5 mg/L for E2 in females. However, no histological alteration in gonads neither significant variation in reproductive performances were detected following zebrafish exposure to gallic or pelargonic acid. Additional investigations concerning the mode of application and the environmental fate of these substances may warrant their further use in freshwater systems at concentrations compatible with biocidal/allelochemical effects. © 2015 Wiley Periodicals, Inc. Environ Toxicol 32: 227-240, 2017.
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Affiliation(s)
- Didier Techer
- UR AFPA, USC INRA 340, Campus Victor Grignard, Université De Lorraine, Boulevard Des Aiguillettes, BP 239, 54506, Vandœuvre-lès-Nancy Cedex, France
| | - Sylvain Milla
- UR AFPA, USC INRA 340, Campus Victor Grignard, Université De Lorraine, Boulevard Des Aiguillettes, BP 239, 54506, Vandœuvre-lès-Nancy Cedex, France
| | - Pascal Fontaine
- UR AFPA, USC INRA 340, Campus Victor Grignard, Université De Lorraine, Boulevard Des Aiguillettes, BP 239, 54506, Vandœuvre-lès-Nancy Cedex, France
| | - Sandrine Viot
- UR AFPA, USC INRA 340, Campus Victor Grignard, Université De Lorraine, Boulevard Des Aiguillettes, BP 239, 54506, Vandœuvre-lès-Nancy Cedex, France
| | - Marielle Thomas
- UR AFPA, USC INRA 340, Campus Victor Grignard, Université De Lorraine, Boulevard Des Aiguillettes, BP 239, 54506, Vandœuvre-lès-Nancy Cedex, France
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225
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Walker DM, Gore AC. Epigenetic impacts of endocrine disruptors in the brain. Front Neuroendocrinol 2017; 44:1-26. [PMID: 27663243 PMCID: PMC5429819 DOI: 10.1016/j.yfrne.2016.09.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 08/05/2016] [Accepted: 09/14/2016] [Indexed: 12/12/2022]
Abstract
The acquisition of reproductive competence is organized and activated by steroid hormones acting upon the hypothalamus during critical windows of development. This review describes the potential role of epigenetic processes, particularly DNA methylation, in the regulation of sexual differentiation of the hypothalamus by hormones. We examine disruption of these processes by endocrine-disrupting chemicals (EDCs) in an age-, sex-, and region-specific manner, focusing on how perinatal EDCs act through epigenetic mechanisms to reprogram DNA methylation and sex steroid hormone receptor expression throughout life. These receptors are necessary for brain sexual differentiation and their altered expression may underlie disrupted reproductive physiology and behavior. Finally, we review the literature on histone modifications and non-coding RNA involvement in brain sexual differentiation and their perturbation by EDCs. By putting these data into a sex and developmental context we conclude that perinatal EDC exposure alters the developmental trajectory of reproductive neuroendocrine systems in a sex-specific manner.
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Affiliation(s)
- Deena M Walker
- Fishberg Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1065, New York, NY 10029, USA.
| | - Andrea C Gore
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA; Institute for Cellular and Molecular Biology, and The University of Texas at Austin, Austin, TX 78712, USA; Institute for Neuroscience, The University of Texas at Austin, Austin, TX 78712, USA
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226
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Rusiecki JA, Beane Freeman LE, Bonner MR, Alexander M, Chen L, Andreotti G, Barry KH, Moore LE, Byun HM, Kamel F, Alavanja M, Hoppin JA, Baccarelli A. High pesticide exposure events and DNA methylation among pesticide applicators in the agricultural health study. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2017; 58:19-29. [PMID: 27996157 PMCID: PMC5416937 DOI: 10.1002/em.22067] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 11/11/2016] [Accepted: 11/14/2016] [Indexed: 05/21/2023]
Abstract
Pesticide exposure has been associated with acute and chronic adverse health effects. DNA methylation (DNAm) may mediate these effects. We evaluated the association between experiencing unusually high pesticide exposure events (HPEEs) and DNAm among pesticide applicators in the Agricultural Health Study (AHS), a prospective study of applicators from Iowa and North Carolina. DNA was extracted from whole blood from male AHS pesticide applicators (n = 695). Questionnaire data were used to ascertain the occurrence of HPEEs over the participant's lifetime. Pyrosequencing was used to quantify DNAm in CDH1, GSTp1, and MGMT promoters, and in the repetitive element, LINE-1. Linear and robust regression analyses evaluated adjusted associations between HPEE and DNAm. Ever having an HPEE (n = 142; 24%) was associated with elevated DNAm in the GSTp1 promoter at CpG7 (chr11:67,351,134; P < 0.01) and for the mean across the CpGs measured in the GSTp1 promoter (P < 0.01). In stratified analyses, elevated GSTP1 promoter DNAm associated with HPEE was more pronounced among applicators >59 years and those with plasma folate levels ≤16.56 ng/mL (p-interaction <0.01); HPEE was associated with reduced MGMT promoter DNAm at CpG2 (chr10:131,265,803; P = 0.03), CpG3 (chr10:131,265,810; P = 0.05), and the mean across CpGs measured in the MGMT promoter (P = 0.03) among applicators >59 years and reduced LINE-1 DNAm (P = 0.05) among applicators with ≤16.56 ng/mL plasma folate. Non-specific HPEEs may contribute to increased DNAm in GSTp1, and in some groups, reduced DNAm in MGMT and LINE-1. The impacts of these alterations on disease development are unclear, but elevated GSTp1 promoter DNAm and subsequent gene inactivation has been consistently associated with prostate cancer. Environ. Mol. Mutagen. 58:19-29, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Jennifer A Rusiecki
- Department of Preventive Medicine, Uniformed Services University, Bethesda, Maryland
| | - Laura E Beane Freeman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, Maryland
| | - Matthew R Bonner
- Department of Epidemiology and Environmental Health, State University of New York, Buffalo, New York
| | - Melannie Alexander
- Department of Preventive Medicine, Uniformed Services University, Bethesda, Maryland
| | - Ligong Chen
- Department of Preventive Medicine, Uniformed Services University, Bethesda, Maryland
| | - Gabriella Andreotti
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, Maryland
| | - Kathryn H Barry
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, Maryland
| | - Lee E Moore
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, Maryland
| | - Hyang-Min Byun
- Institute of Cellular Medicine, Newcastle University, Newcastle, United Kingdom
| | - Freya Kamel
- Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Michael Alavanja
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, Maryland
| | - Jane A Hoppin
- Department of Biological Sciences, Center for Human Health and the Environment, North Carolina State University, Raleigh, North Carolina
| | - Andrea Baccarelli
- Harvard School of Public Health, Harvard University, Boston, Massachusetts
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227
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Ye M, Beach J, Martin JW, Senthilselvan A. Pesticide exposures and respiratory health in general populations. J Environ Sci (China) 2017; 51:361-370. [PMID: 28115149 DOI: 10.1016/j.jes.2016.11.012] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 11/10/2016] [Accepted: 11/18/2016] [Indexed: 06/06/2023]
Abstract
Human exposures to pesticides can occur in the workplace, in the household and through the ambient environment. While several articles have reviewed the impact of pesticide exposures on human respiratory health in occupational settings, to the best of our knowledge, this article is the first one to review published studies on the association between pesticide exposures and human respiratory health in the general populations. In this article, we critically reviewed evidences up to date studying the associations between non-occupational pesticide exposures and respiratory health in general populations. This article also highlighted questions arising from these studies, including our recent analyses using the data from the Canadian Health Measures Survey (CHMS), for future research. We found few studies have addressed the impact of environmental pesticide exposures on respiratory health, especially on lung function, in general populations. In the studies using the data from CHMS Cycle 1, exposures to OP insecticides, pyrethroid insecticides, and the organochlorine pesticide DDT were associated with impaired lung function in the Canadian general population, but no significant associations were observed for the herbicide 2,4-D. Future research should focus on the potential age-specific and pesticide-specific effect on respiratory health in the general population, and repeated longitudinal study design is critical for assessing the temporal variations in pesticide exposures. Research findings from current studies of non-occupational pesticide exposures and their health impact in general population will help to improve the role of regulatory policies in mitigating pesticide-related public health problems, and thereafter providing greater benefit to the general population.
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Affiliation(s)
- Ming Ye
- School of Public Health, University of Alberta, Edmonton, Alberta T6G 1C9, Canada..
| | - Jeremy Beach
- School of Public Health, University of Alberta, Edmonton, Alberta T6G 1C9, Canada.; Division of Preventive Medicine, Department of Medicine, University of Alberta, Edmonton, Alberta T6G 2T4, Canada
| | - Jonathan W Martin
- Division of Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta T6G 2G3, Canada
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228
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Elswefy SES, Abdallah FR, Atteia HH, Wahba AS, Hasan RA. Inflammation, oxidative stress and apoptosis cascade implications in bisphenol A-induced liver fibrosis in male rats. Int J Exp Pathol 2016; 97:369-379. [PMID: 27925325 DOI: 10.1111/iep.12207] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 08/15/2016] [Indexed: 12/15/2022] Open
Abstract
Bisphenol A (BPA) is a key monomer in the production of plastics. It has been shown to be hepatotoxic. Inflammation and oxidative stress are closely linked with liver fibrosis, the major contributing factor to hepatic failure. Therefore, the aim of this study was to evaluate the impact of chronic exposure to BPA on the development of hepatic fibrosis in male rats and to determine the cross-talk between the hepatic cytokine network, oxidative stress and apoptosis. For this purpose, 30 male Wistar albino rats were divided into three equal groups as follows: the first group was given no treatment (normal control group); the second group was given corn oil once daily by oral gavage for 8 weeks (vehicle control group); and the third group received BPA (50 mg/kg body weight/day, p.o.) for 8 weeks. BPA administration induced liver fibrosis as reflected in an increase in serum hepatic enzymes activities, hepatic hydroxyproline content and histopathological changes particularly increased collagen fibre deposition around the portal tract. In addition, there was inflammation (as reflected in increase in interleukin-1beta 'IL-1β', decrease in interleukin-10 'IL-10' serum levels and increase in IL-1β/IL-10 ratio), oxidative stress (as reflected in increase in malondialdehyde (MDA) level, reduction in reduced glutathione (GSH) content and inhibition of catalase (CAT) activity) and apoptosis [as reflected in an increase in caspase-3 level and a decrease in numbers of B-cell lymphoma 2 (BCL2)-immunopositive hepatocytes]. Interestingly, BPA had an upregulating effect on an extracellular matrix turnover gene [as reflected in matrix metalloproteinase-9 (MMP-9)] and a downregulating effect on its inhibitor gene [as reflected in tissue inhibitor of matrix metalloproteinase-2 (TIMP-2)] expression. Thus, the mechanism by which BPA induced liver fibrosis seems to be related to stimulation of the inflammatory response, along with oxidative stress, the apoptotic pathway and activation of extracellular matrix turnover.
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Affiliation(s)
- Sahar El-Sayed Elswefy
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Sharkia Governorate, Egypt
| | - Fatma Rizk Abdallah
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Sharkia Governorate, Egypt
| | - Hebatallah Husseini Atteia
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Sharkia Governorate, Egypt
| | - Alaa Samir Wahba
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Sharkia Governorate, Egypt
| | - Rehab Abdallah Hasan
- Department of Histology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt
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229
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Wang Y, Hollis-Hansen K, Ren X, Qiu Y, Qu W. Do environmental pollutants increase obesity risk in humans? Obes Rev 2016; 17:1179-1197. [PMID: 27706898 DOI: 10.1111/obr.12463] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 07/01/2016] [Accepted: 07/31/2016] [Indexed: 02/01/2023]
Abstract
OBJECTIVES Obesity has become a global epidemic and threat to public health. A good understanding of the causes can help attenuate the risk and spread. Environmental pollutants may have contributed to the rising global obesity rates. Some research reported associations between chemical pollutants and obesity, but findings are mixed. This study systematically examined associations between chemical pollutants and obesity in human subjects. METHODS Systematic review of relevant studies published between 1 January 1995 and 1 June 2016 by searching PubMed and MEDLINE®. RESULTS Thirty-five cross-sectional (n = 17) and cohort studies (n = 18) were identified that reported on associations between pollutants and obesity measures. Of them, 16 studies (45.71%) reported a positive association; none reported a sole inverse association; three (8.57%) reported a null association only; six (17.14%) reported both a positive and null association; seven (20.00%) reported a positive and inverse association; and three studies (8.57%) reported all associations (positive, inverse and null). Most studies examined the association between multiple different pollutants, different levels of concentration and in subsamples, which results in mixed results. Thirty-three studies reported at least one positive association between obesity and chemicals, such as polychlorinated biphenyls, biphenyl A, dichlorodiphenyltrichloroethane, dichlorodiphenyldichloroethylene and more. Certain chemicals, such as biphenyl A, were more likely to have high ORs ranging from 1.0 to 3.0, whereas highly chlorinated polychlorinated biphenyls were more likely to have negative ORs. Effects of chemicals on the endocrine system and obesity might vary by substance, exposure level, measure of adiposity and subject characteristics (e.g. sex and age). CONCLUSIONS Accumulated evidences show positive associations between pollutants and obesity in humans. Future large, long-term, follow-up studies are needed to assess impact of chemical pollutants on obesity risk and related mechanisms.
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Affiliation(s)
- Y Wang
- Systems-oriented Global Childhood Obesity Intervention Program, Department of Epidemiology and Environmental Health, State University of New York at Buffalo, Buffalo, NY, USA.,Department of Community Health and Health Behavior, State University of New York at Buffalo, Buffalo, NY, USA
| | - K Hollis-Hansen
- Systems-oriented Global Childhood Obesity Intervention Program, Department of Epidemiology and Environmental Health, State University of New York at Buffalo, Buffalo, NY, USA.,Department of Community Health and Health Behavior, State University of New York at Buffalo, Buffalo, NY, USA
| | - X Ren
- Systems-oriented Global Childhood Obesity Intervention Program, Department of Epidemiology and Environmental Health, State University of New York at Buffalo, Buffalo, NY, USA
| | - Y Qiu
- Systems-oriented Global Childhood Obesity Intervention Program, Department of Epidemiology and Environmental Health, State University of New York at Buffalo, Buffalo, NY, USA.,Department of Health Toxicology, School of Public Health, Shanxi Medical University, Taiyuan, China
| | - W Qu
- Key Laboratory of the Public Health Safety, Ministry of Education, Department of Environmental Health, Fudan University, Shanghai, China.,Institute of Water and Health Strategy Research, School of Public Health, Fudan University, Shanghai, China
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230
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Gato WE, Hunter DA, Whitby SL, Mays CA, Yau W. Investigating Susceptibility to Diabetes Using Features of the Adipose Tissue in Response to In Utero Polycyclic Aromatic Hydrocarbons Exposure. Diabetes Metab J 2016; 40:494-508. [PMID: 27535646 PMCID: PMC5167714 DOI: 10.4093/dmj.2016.40.6.494] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 07/13/2016] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND In recent times, there has been an increase in the incidence of type 2 diabetes mellitus (T2DM) particularly in children. Adipocyte dysfunction provide a critical link between obesity and insulin resistance resulting in diabetes outcome. Further, environmental chemical exposure during early years of life might be a significant contributing factor to the increase in the incidence of T2DM. This study tests the idea that exposure to environmental contaminants (2-aminoanthracene [2AA]) in utero will show effects in the adipose tissue (AT) that signify T2DM vulnerability. 2AA is a polycyclic aromatic hydrocarbon found in a variety of products. METHODS To accomplish the study objective, pregnant dams were fed various amounts of 2AA adulterated diets from gestation through postnatal period. The neonates and older offspring were analyzed for diabetic-like genes in the ATs and analysis of serum glucose. Furthermore, weight monitoring, histopathology and immunohistochemical (IHC) staining for CD68 in AT, adipocyte size determination and adiponectin amounts in serum were undertaken. RESULTS Up-regulation of adiponectin and interleukin-6 genes were noted in the pups and older rats. Combination of intrauterine 2AA toxicity with moderate high fat diet exhibited gene expression patterns similar to those of the neonates. Elevated serum glucose levels were noted in treated groups. IHC of the AT indicated no significant malformations; however, CD68+ cells were greater in the animals treated to 2AA. Similarly, mean sizes of the adipocytes were larger in treated and combined 2AA and moderate high fat animals. Adiponectin was reduced in 2AA groups. CONCLUSION From the preceding, it appears intrauterine 2AA disturbance, when combined with excess fat accumulation will lead to greater risk for the diabetic condition.
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Affiliation(s)
- Worlanyo E Gato
- Department of Chemistry, Georgia Southern University, Statesboro, GA, USA.
| | - Daniel A Hunter
- Department of Chemistry, Georgia Southern University, Statesboro, GA, USA
| | - Shamaya L Whitby
- Department of Chemistry, Georgia Southern University, Statesboro, GA, USA
| | - Christopher A Mays
- Department of Chemistry, Georgia Southern University, Statesboro, GA, USA
| | - Wilson Yau
- Department of Pathology, University of Georgia College of Veterinary Medicine, Athens, GA, USA
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231
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Khan S, Beigh S, Chaudhari BP, Sharma S, Aliul Hasan Abdi S, Ahmad S, Ahmad F, Parvez S, Raisuddin S. Mitochondrial dysfunction induced by Bisphenol A is a factor of its hepatotoxicity in rats. ENVIRONMENTAL TOXICOLOGY 2016; 31:1922-1934. [PMID: 26450347 DOI: 10.1002/tox.22193] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Revised: 08/24/2015] [Accepted: 08/29/2015] [Indexed: 06/05/2023]
Abstract
Bisphenol A (BPA), an estrogenic and endocrine disrupting agent, is widely used in manufacturing of polycarbonate plastics and epoxy resins. BPA and other endocrine disrupting chemicals (EDCs) act via multiple mechanisms including interference with mitochondrial functions. Mitochondria are the hub of cellular energy pool and hence are the target of many EDCs. We studied perturbation of activities of mitochondrial enzymes by BPA and its possible role in hepatotoxicity in Wistar rats. Rats were exposed to BPA (150 mg/kg, 250 mg/kg, 500 mg/kg per os, for 14 days) and activities of enzymes of mitochondrial electron transport chain (ETC) were measured. Besides, other biochemical parameters such as superoxide generation, protein oxidation, and lipid peroxidation (LPO) were also measured. Our results indicated a significant decrease in the activities of enzymes of mitochondrial ETC complexes, i.e., complex I, II, III, IV, and V along with significant increase in LPO and protein oxidation. Additionally, a significant increase in mitochondrial superoxide generation was also observed. All these findings could be attributed to enhanced oxidative stress, decrease in reduced glutathione level, and decrease in the activity of superoxide dismutase in rat liver mitochondria isolated from BPA-treated rats. BPA treatment also caused a significant increase in serum alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, and lactate dehydrogenase indicating its potential hepatotoxicity. Furthermore, histopathological findings revealed marked edema formation, hepatocellular degeneration, and necrosis of liver tissue in BPA-exposed rats. In conclusion, this study provides an evidence of impaired mitochondrial bioenergetics and liver toxicity after high-dose BPA exposure in rats. © 2015 Wiley Periodicals, Inc. Environ Toxicol 31: 1922-1934, 2016.
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Affiliation(s)
- Somaira Khan
- Department of Medical Elementology & Toxicology, Jamia Hamdard (Hamdard University), New Delhi, 110 062, India
| | - Saba Beigh
- Department of Medical Elementology & Toxicology, Jamia Hamdard (Hamdard University), New Delhi, 110 062, India
| | - Bhushan P Chaudhari
- Central Pathology Laboratory, CSIR-Indian Institute of Toxicology Research, Lucknow, 226 001, India
| | - Shikha Sharma
- Department of Medical Elementology & Toxicology, Jamia Hamdard (Hamdard University), New Delhi, 110 062, India
| | - Sayed Aliul Hasan Abdi
- Department of Medical Elementology & Toxicology, Jamia Hamdard (Hamdard University), New Delhi, 110 062, India
| | - Shahzad Ahmad
- Department of Medical Elementology & Toxicology, Jamia Hamdard (Hamdard University), New Delhi, 110 062, India
| | - Firoz Ahmad
- Department of Medical Elementology & Toxicology, Jamia Hamdard (Hamdard University), New Delhi, 110 062, India
| | - Suhel Parvez
- Department of Medical Elementology & Toxicology, Jamia Hamdard (Hamdard University), New Delhi, 110 062, India
| | - Sheikh Raisuddin
- Department of Medical Elementology & Toxicology, Jamia Hamdard (Hamdard University), New Delhi, 110 062, India
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232
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Houari S, Loiodice S, Jedeon K, Berdal A, Babajko S. Expression of Steroid Receptors in Ameloblasts during Amelogenesis in Rat Incisors. Front Physiol 2016; 7:503. [PMID: 27853434 PMCID: PMC5090168 DOI: 10.3389/fphys.2016.00503] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 10/13/2016] [Indexed: 12/02/2022] Open
Abstract
Endocrine disrupting chemicals (EDCs) play a part in the modern burst of diseases and interfere with the steroid hormone axis. Bisphenol A (BPA), one of the most active and widely used EDCs, affects ameloblast functions, leading to an enamel hypomineralization pattern similar to that of Molar Incisor Hypomineralization (MIH). In order to explore the molecular pathways stimulated by BPA during amelogenesis, we thoroughly investigated the receptors known to directly or indirectly mediate the effects of BPA. The expression patterns of high affinity BPA receptors (ERRγ, GPR30), of ketosteroid receptors (ERs, AR, PGR, GR, MR), of the retinoid receptor RXRα, and PPARγ were established using RT-qPCR analysis of RNAs extracted from microdissected enamel organ of adult rats. Their expression was dependent on the stage of ameloblast differentiation, except that of ERβ and PPARγ which remained undetectable. An additional large scale microarray analysis revealed three main groups of receptors according to their level of expression in maturation-stage ameloblasts. The expression level of RXRα was the highest, similar to the vitamin D receptor (VDR), whereas the others were 13 to 612-fold lower, with AR and GR being intermediate. Immunofluorescent analysis of VDR, ERα and AR confirmed their presence mainly in maturation- stage ameloblasts. These data provide further evidence that ameloblasts express a specific combination of hormonal receptors depending on their developmental stage. This study represents the first step toward understanding dental endocrinology as well as some of the effects of EDCs on the pathophysiology of amelogenesis.
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Affiliation(s)
- Sophia Houari
- Paris Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale UMRS 1138, Université Paris-Descartes, Université Pierre et Marie Curie-ParisParis, France; Université Paris-Diderot, Unité de Formation et de Recherche d'OdontologieParis, France
| | - Sophia Loiodice
- Paris Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale UMRS 1138, Université Paris-Descartes, Université Pierre et Marie Curie-ParisParis, France; Université Paris-Diderot, Unité de Formation et de Recherche d'OdontologieParis, France
| | - Katia Jedeon
- Paris Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale UMRS 1138, Université Paris-Descartes, Université Pierre et Marie Curie-ParisParis, France; Université Paris-Diderot, Unité de Formation et de Recherche d'OdontologieParis, France
| | - Ariane Berdal
- Paris Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale UMRS 1138, Université Paris-Descartes, Université Pierre et Marie Curie-ParisParis, France; Université Paris-Diderot, Unité de Formation et de Recherche d'OdontologieParis, France; Centre de Référence des maladies rares de la face et de la cavité buccale MAFACE hôpital Rothschild, AP-HPParis, France
| | - Sylvie Babajko
- Paris Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut National de la Santé et de la Recherche Médicale UMRS 1138, Université Paris-Descartes, Université Pierre et Marie Curie-ParisParis, France; Université Paris-Diderot, Unité de Formation et de Recherche d'OdontologieParis, France
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233
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Jedeon K, Loiodice S, Salhi K, Le Normand M, Houari S, Chaloyard J, Berdal A, Babajko S. Androgen Receptor Involvement in Rat Amelogenesis: An Additional Way for Endocrine-Disrupting Chemicals to Affect Enamel Synthesis. Endocrinology 2016; 157:4287-4296. [PMID: 27684650 DOI: 10.1210/en.2016-1342] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Endocrine-disrupting chemicals (EDCs) that interfere with the steroid axis can affect amelogenesis, leading to enamel hypomineralization similar to that of molar incisor hypomineralization, a recently described enamel disease. We investigated the sex steroid receptors that may mediate the effects of EDCs during rat amelogenesis. The expression of androgen receptor (AR), estrogen receptor (ER)-α, and progesterone receptor was dependent on the stage of ameloblast differentiation, whereas ERβ remained undetectable. AR was the only receptor selectively expressed in ameloblasts involved in final enamel mineralization. AR nuclear translocation and induction of androgen-responsive element-containing promoter activity upon T treatment, demonstrated ameloblast responsiveness to androgens. T regulated the expression of genes involved in enamel mineralization such as KLK4, amelotin, SLC26A4, and SLC5A8 but not the expression of genes encoding matrix proteins, which determine enamel thickness. Vinclozolin and to a lesser extent bisphenol A, two antiandrogenic EDCs that cause enamel defects, counteracted the actions of T. In conclusion, we show, for the first time, the following: 1) ameloblasts express AR; 2) the androgen signaling pathway is involved in the enamel mineralization process; and 3) EDCs with antiandrogenic effects inhibit AR activity and preferentially affect amelogenesis in male rats. Their action, through the AR pathway, may specifically and irreversibly affect enamel, potentially leading to the use of dental defects as a biomarker of exposure to environmental pollutants. These results are consistent with the steroid hormones affecting ameloblasts, raising the issue of the hormonal influence on amelogenesis and possible sexual dimorphism in enamel quality.
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Affiliation(s)
- Katia Jedeon
- Centre de Recherche des Cordeliers (K.J., S.L., K.S., M.L.N., S.H., J.C., A.B., S.B.), INSERM Unité Mixte de Recherche en Santé 1138, Université Paris-Descartes, Université Pierre et Marie Curie-Paris, Paris Laboratory of Molecular Oral Pathophysiology, and Unité de Formation et de Recherche d'Odontologie (K.J., S.L., K.S., S.H., J.C., A.B., S.B.), Université Paris-Diderot, F-75006 Paris, France; and Centre de Référence des Maladies Rares de la Face et de la Cavité Buccale (K.J., A.B.), Hôpital Rothschild, Assistance Publique-Hôpitaux de Paris, F-75571 Paris, France
| | - Sophia Loiodice
- Centre de Recherche des Cordeliers (K.J., S.L., K.S., M.L.N., S.H., J.C., A.B., S.B.), INSERM Unité Mixte de Recherche en Santé 1138, Université Paris-Descartes, Université Pierre et Marie Curie-Paris, Paris Laboratory of Molecular Oral Pathophysiology, and Unité de Formation et de Recherche d'Odontologie (K.J., S.L., K.S., S.H., J.C., A.B., S.B.), Université Paris-Diderot, F-75006 Paris, France; and Centre de Référence des Maladies Rares de la Face et de la Cavité Buccale (K.J., A.B.), Hôpital Rothschild, Assistance Publique-Hôpitaux de Paris, F-75571 Paris, France
| | - Khaled Salhi
- Centre de Recherche des Cordeliers (K.J., S.L., K.S., M.L.N., S.H., J.C., A.B., S.B.), INSERM Unité Mixte de Recherche en Santé 1138, Université Paris-Descartes, Université Pierre et Marie Curie-Paris, Paris Laboratory of Molecular Oral Pathophysiology, and Unité de Formation et de Recherche d'Odontologie (K.J., S.L., K.S., S.H., J.C., A.B., S.B.), Université Paris-Diderot, F-75006 Paris, France; and Centre de Référence des Maladies Rares de la Face et de la Cavité Buccale (K.J., A.B.), Hôpital Rothschild, Assistance Publique-Hôpitaux de Paris, F-75571 Paris, France
| | - Manon Le Normand
- Centre de Recherche des Cordeliers (K.J., S.L., K.S., M.L.N., S.H., J.C., A.B., S.B.), INSERM Unité Mixte de Recherche en Santé 1138, Université Paris-Descartes, Université Pierre et Marie Curie-Paris, Paris Laboratory of Molecular Oral Pathophysiology, and Unité de Formation et de Recherche d'Odontologie (K.J., S.L., K.S., S.H., J.C., A.B., S.B.), Université Paris-Diderot, F-75006 Paris, France; and Centre de Référence des Maladies Rares de la Face et de la Cavité Buccale (K.J., A.B.), Hôpital Rothschild, Assistance Publique-Hôpitaux de Paris, F-75571 Paris, France
| | - Sophia Houari
- Centre de Recherche des Cordeliers (K.J., S.L., K.S., M.L.N., S.H., J.C., A.B., S.B.), INSERM Unité Mixte de Recherche en Santé 1138, Université Paris-Descartes, Université Pierre et Marie Curie-Paris, Paris Laboratory of Molecular Oral Pathophysiology, and Unité de Formation et de Recherche d'Odontologie (K.J., S.L., K.S., S.H., J.C., A.B., S.B.), Université Paris-Diderot, F-75006 Paris, France; and Centre de Référence des Maladies Rares de la Face et de la Cavité Buccale (K.J., A.B.), Hôpital Rothschild, Assistance Publique-Hôpitaux de Paris, F-75571 Paris, France
| | - Jessica Chaloyard
- Centre de Recherche des Cordeliers (K.J., S.L., K.S., M.L.N., S.H., J.C., A.B., S.B.), INSERM Unité Mixte de Recherche en Santé 1138, Université Paris-Descartes, Université Pierre et Marie Curie-Paris, Paris Laboratory of Molecular Oral Pathophysiology, and Unité de Formation et de Recherche d'Odontologie (K.J., S.L., K.S., S.H., J.C., A.B., S.B.), Université Paris-Diderot, F-75006 Paris, France; and Centre de Référence des Maladies Rares de la Face et de la Cavité Buccale (K.J., A.B.), Hôpital Rothschild, Assistance Publique-Hôpitaux de Paris, F-75571 Paris, France
| | - Ariane Berdal
- Centre de Recherche des Cordeliers (K.J., S.L., K.S., M.L.N., S.H., J.C., A.B., S.B.), INSERM Unité Mixte de Recherche en Santé 1138, Université Paris-Descartes, Université Pierre et Marie Curie-Paris, Paris Laboratory of Molecular Oral Pathophysiology, and Unité de Formation et de Recherche d'Odontologie (K.J., S.L., K.S., S.H., J.C., A.B., S.B.), Université Paris-Diderot, F-75006 Paris, France; and Centre de Référence des Maladies Rares de la Face et de la Cavité Buccale (K.J., A.B.), Hôpital Rothschild, Assistance Publique-Hôpitaux de Paris, F-75571 Paris, France
| | - Sylvie Babajko
- Centre de Recherche des Cordeliers (K.J., S.L., K.S., M.L.N., S.H., J.C., A.B., S.B.), INSERM Unité Mixte de Recherche en Santé 1138, Université Paris-Descartes, Université Pierre et Marie Curie-Paris, Paris Laboratory of Molecular Oral Pathophysiology, and Unité de Formation et de Recherche d'Odontologie (K.J., S.L., K.S., S.H., J.C., A.B., S.B.), Université Paris-Diderot, F-75006 Paris, France; and Centre de Référence des Maladies Rares de la Face et de la Cavité Buccale (K.J., A.B.), Hôpital Rothschild, Assistance Publique-Hôpitaux de Paris, F-75571 Paris, France
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Birks L, Casas M, Garcia AM, Alexander J, Barros H, Bergström A, Bonde JP, Burdorf A, Costet N, Danileviciute A, Eggesbø M, Fernández MF, González-Galarzo MC, Hanke W, Jaddoe V, Kogevinas M, Kull I, Lertxundi A, Melaki V, Andersen AMN, Olea N, Polanska K, Rusconi F, Santa-Marina L, Santos AC, Vrijkotte T, Zugna D, Nieuwenhuijsen M, Cordier S, Vrijheid M. Occupational Exposure to Endocrine-Disrupting Chemicals and Birth Weight and Length of Gestation: A European Meta-Analysis. ENVIRONMENTAL HEALTH PERSPECTIVES 2016; 124:1785-1793. [PMID: 27152464 PMCID: PMC5089886 DOI: 10.1289/ehp208] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 10/07/2015] [Accepted: 04/28/2016] [Indexed: 05/20/2023]
Abstract
BACKGROUND Women of reproductive age can be exposed to endocrine-disrupting chemicals (EDCs) at work, and exposure to EDCs in pregnancy may affect fetal growth. OBJECTIVES We assessed whether maternal occupational exposure to EDCs during pregnancy as classified by application of a job exposure matrix was associated with birth weight, term low birth weight (LBW), length of gestation, and preterm delivery. METHODS Using individual participant data from 133,957 mother-child pairs in 13 European cohorts spanning births from 1994 through 2011, we linked maternal job titles with exposure to 10 EDC groups as assessed through a job exposure matrix. For each group, we combined the two levels of exposure categories (possible and probable) and compared birth outcomes with the unexposed group (exposure unlikely). We performed meta-analyses of cohort-specific estimates. RESULTS Eleven percent of pregnant women were classified as exposed to EDCs at work during pregnancy, based on job title. Classification of exposure to one or more EDC group was associated with an increased risk of term LBW [odds ratio (OR) = 1.25; 95% CI: 1.04, 1.49], as were most specific EDC groups; this association was consistent across cohorts. Further, the risk increased with increasing number of EDC groups (OR = 2.11; 95% CI: 1.10, 4.06 for exposure to four or more EDC groups). There were few associations (p < 0.05) with the other outcomes; women holding job titles classified as exposed to bisphenol A or brominated flame retardants were at higher risk for longer length of gestation. CONCLUSION Results from our large population-based birth cohort design indicate that employment during pregnancy in occupations classified as possibly or probably exposed to EDCs was associated with an increased risk of term LBW. Citation: Birks L, Casas M, Garcia AM, Alexander J, Barros H, Bergström A, Bonde JP, Burdorf A, Costet N, Danileviciute A, Eggesbø M, Fernández MF, González-Galarzo MC, Gražulevičienė R, Hanke W, Jaddoe V, Kogevinas M, Kull I, Lertxundi A, Melaki V, Andersen AM, Olea N, Polanska K, Rusconi F, Santa-Marina L, Santos AC, Vrijkotte T, Zugna D, Nieuwenhuijsen M, Cordier S, Vrijheid M. 2016. Occupational exposure to endocrine-disrupting chemicals and birth weight and length of gestation: a European meta-analysis. Environ Health Perspect 124:1785-1793; http://dx.doi.org/10.1289/EHP208.
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Affiliation(s)
- Laura Birks
- ISGlobal, Center for Research in Environmental Epidemiology, Barcelona, Spain
- Consorcio de Investigación Biomédica de Epidemiología y Salud Pública, Spain
- Universitat Pompeu Fabra, Barcelona, Spain
- Address correspondence to L. Birks, ISGlobal, Center for Research in Environmental Epidemiology, Doctor Aiguader, 88, 08003 Barcelona, Spain. Telephone: 34 932 147 319. E-mail:
| | - Maribel Casas
- ISGlobal, Center for Research in Environmental Epidemiology, Barcelona, Spain
- Consorcio de Investigación Biomédica de Epidemiología y Salud Pública, Spain
- Universitat Pompeu Fabra, Barcelona, Spain
| | - Ana M. Garcia
- Consorcio de Investigación Biomédica de Epidemiología y Salud Pública, Spain
- Department of Preventive Medicine and Public Health, University of Valencia, Valencia, Spain
- Center for Research in Occupational Health, Barcelona, Spain
| | | | - Henrique Barros
- Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Porto, Portugal
| | - Anna Bergström
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Jens Peter Bonde
- Department of Occupational and Environmental Medicine, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark
| | - Alex Burdorf
- Department of Public Health, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Nathalie Costet
- National Institute of Health and Medical Research, InsermU1085 – Irset, University of Rennes, Rennes, France
| | - Asta Danileviciute
- Department of Environmental Science, Vytautas Magnus University, Kaunas, Lithuania
| | | | - Mariana F. Fernández
- Consorcio de Investigación Biomédica de Epidemiología y Salud Pública, Spain
- Instituto de Investigación Biosanitaria ibs.Granada, University of Granada, Granada, Spain
| | | | | | - Wojciech Hanke
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, Lodz, Poland
| | - Vincent Jaddoe
- The Generation R Study Group, Department of Epidemiology, Department of Pediatrics, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Manolis Kogevinas
- ISGlobal, Center for Research in Environmental Epidemiology, Barcelona, Spain
- Consorcio de Investigación Biomédica de Epidemiología y Salud Pública, Spain
- Hospital Del Mar Medical Research Institute, Barcelona, Spain
- National School of Public Health, Athens, Greece
| | - Inger Kull
- Sachs’ Children’s Hospital, Södersjukhuset, Stockholm, Sweden
- Department of Clinical Science and Education, Karolinska Institutet, Stockholm, Sweden
| | - Aitana Lertxundi
- Faculty of Medicine, University of the Basque Country, Leioa, Basque Country, Spain
- BioDonostia Health Research Institute, San Sebastian, Basque Country, Spain
| | - Vasiliki Melaki
- Department of Social Medicine, Faculty of Medicine, University of Crete, University Hospital of Heraklion, Crete, Greece
| | | | - Nicolás Olea
- Consorcio de Investigación Biomédica de Epidemiología y Salud Pública, Spain
- Instituto de Investigación Biosanitaria ibs.Granada, University of Granada, Granada, Spain
| | - Kinga Polanska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, Lodz, Poland
| | | | - Loreto Santa-Marina
- Consorcio de Investigación Biomédica de Epidemiología y Salud Pública, Spain
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
- Department of Health, Government of the Basque Country, San Sebastian, Spain
| | - Ana Cristina Santos
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Tanja Vrijkotte
- Department of Public Health, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Daniela Zugna
- Cancer Epidemiology Unit, Department of Medical Sciences, University of Turin, Turin, Italy
| | - Mark Nieuwenhuijsen
- ISGlobal, Center for Research in Environmental Epidemiology, Barcelona, Spain
- Consorcio de Investigación Biomédica de Epidemiología y Salud Pública, Spain
- Universitat Pompeu Fabra, Barcelona, Spain
| | - Sylvaine Cordier
- National Institute of Health and Medical Research, InsermU1085 – Irset, University of Rennes, Rennes, France
| | - Martine Vrijheid
- ISGlobal, Center for Research in Environmental Epidemiology, Barcelona, Spain
- Consorcio de Investigación Biomédica de Epidemiología y Salud Pública, Spain
- Universitat Pompeu Fabra, Barcelona, Spain
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235
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Jedeon K, Houari S, Loiodice S, Thuy TT, Le Normand M, Berdal A, Babajko S. Chronic Exposure to Bisphenol A Exacerbates Dental Fluorosis in Growing Rats. J Bone Miner Res 2016; 31:1955-1966. [PMID: 27257137 DOI: 10.1002/jbmr.2879] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 05/16/2016] [Accepted: 06/01/2016] [Indexed: 01/27/2023]
Abstract
Enamel defects resulting from environmental conditions and way of life are public health concerns because of their high prevalence. Because their etiology is unclear, the aim of this study was to analyze the various forms of enamel hypomineralization, and to characterize the genes involved in this process to determine the mechanisms involved in disruptions of amelogenesis. We used bisphenol A (BPA) and fluoride as models; both are commonly encountered in human populations and utilized in dentistry. Wistar rats were chronically exposed to 5 μg/kg/day BPA from day 1 of gestation to day 65 after birth (P65) and 5 mM fluoride from P21 to P65. Resulting enamel defects were comparable to the human enamel pathologies molar incisor hypomineralization (MIH) and dental fluorosis (DF) respectively, and were more severe in rats exposed to both agents than to each agent alone. Large-scale transcriptomic analysis of dental epithelium showed a small group of genes the expression of which was affected by exposure to BPA or NaF. Among the most modulated, many are directly involved in amelogenesis (Amelx, Enam, Klk4, Mmp12, Slc26a4, and Slc5a8), and can be regrouped as forming the "hypomineralization enameloma." Each of these gene expression perturbations may contribute to enamel defects. Exposure to BPA weakens enamel, making it more prone to generate frequent mineralization defects MIH and DF. Our study identifies hypomineralization genes that may enable the use of dental enamel as an early marker of exposure to environmental toxicants because of its unique ability to retrospectively record ameloblast pathophysiology. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- Katia Jedeon
- Cordeliers Research Centre Inserm UMRS 1138, Paris-Diderot University, Paris-Descartes University, Pierre & Marie Curie-Paris University, Laboratory of Molecular Oral Pathophysiology, Paris, France.,Paris-Diderot University, Faculty of Dentistry, Paris, France.,Centre de Référence des maladies rares de la face et de la cavité buccale MAFACE hôpital Rothschild, Paris, France
| | - Sophia Houari
- Cordeliers Research Centre Inserm UMRS 1138, Paris-Diderot University, Paris-Descartes University, Pierre & Marie Curie-Paris University, Laboratory of Molecular Oral Pathophysiology, Paris, France.,Paris-Diderot University, Faculty of Dentistry, Paris, France.,Groupe Hospitalier La Pitié Salpêtrière-Charles Foix, Paris, France
| | - Sophia Loiodice
- Cordeliers Research Centre Inserm UMRS 1138, Paris-Diderot University, Paris-Descartes University, Pierre & Marie Curie-Paris University, Laboratory of Molecular Oral Pathophysiology, Paris, France.,Paris-Diderot University, Faculty of Dentistry, Paris, France
| | - Tran Thu Thuy
- Cordeliers Research Centre Inserm UMRS 1138, Paris-Diderot University, Paris-Descartes University, Pierre & Marie Curie-Paris University, Laboratory of Molecular Oral Pathophysiology, Paris, France.,Paris-Diderot University, Faculty of Dentistry, Paris, France.,Faculty of Odonto-Stomatology, Ho Chi Minh University of Medicine and Pharmacology, Ho Chi Minh-Ville, Vietnam
| | - Manon Le Normand
- Cordeliers Research Centre Inserm UMRS 1138, Paris-Diderot University, Paris-Descartes University, Pierre & Marie Curie-Paris University, Laboratory of Molecular Oral Pathophysiology, Paris, France
| | - Ariane Berdal
- Cordeliers Research Centre Inserm UMRS 1138, Paris-Diderot University, Paris-Descartes University, Pierre & Marie Curie-Paris University, Laboratory of Molecular Oral Pathophysiology, Paris, France.,Paris-Diderot University, Faculty of Dentistry, Paris, France.,Centre de Référence des maladies rares de la face et de la cavité buccale MAFACE hôpital Rothschild, Paris, France
| | - Sylvie Babajko
- Cordeliers Research Centre Inserm UMRS 1138, Paris-Diderot University, Paris-Descartes University, Pierre & Marie Curie-Paris University, Laboratory of Molecular Oral Pathophysiology, Paris, France.,Paris-Diderot University, Faculty of Dentistry, Paris, France
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236
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Siddeek B, Lakhdari N, Inoubli L, Paul-Bellon R, Isnard V, Thibault E, Bongain A, Chevallier D, Repetto E, Trabucchi M, Michiels JF, Yzydorczyk C, Simeoni U, Urtizberea M, Mauduit C, Benahmed M. Developmental epigenetic programming of adult germ cell death disease: Polycomb protein EZH2-miR-101 pathway. Epigenomics 2016; 8:1459-1479. [PMID: 27762633 DOI: 10.2217/epi-2016-0061] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
AIM The Developmental Origin of Health and Disease refers to the concept that early exposure to toxicants or nutritional imbalances during perinatal life induces changes that enhance the risk of developing noncommunicable diseases in adulthood. Patients/materials & methods: An experimental model with an adult chronic germ cell death phenotype resulting from exposure to a xenoestrogen was used. RESULTS A reciprocal negative feedback loop involving decreased EZH2 protein level and increased miR-101 expression was identified. In vitro and in vivo knockdown of EZH2 induced an apoptotic process in germ cells through increased levels of apoptotic factors (BIM and BAD) and DNA repair alteration via topoisomerase 2B deregulation. The increased miR-101 levels were observed in the animal blood, meaning that miR-101 may be a part of a circulating mark of germ cell death. CONCLUSION miR-101-EZH2 pathway deregulation could represent a novel pathophysiological epigenetic basis for adult germ cell disease with environmental and developmental origins.
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Affiliation(s)
- Bénazir Siddeek
- Institut National de la Santé et de la Recherche Médicale, Unité 1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, Nice F-06204, France.,Université de Nice Sophia-Antipolis, Unité de Formation et de Recherche (UFR) Médecine, Nice F-06000, France
| | - Nadjem Lakhdari
- Institut National de la Santé et de la Recherche Médicale, Unité 1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, Nice F-06204, France.,Université de Nice Sophia-Antipolis, Unité de Formation et de Recherche (UFR) Médecine, Nice F-06000, France
| | - Lilia Inoubli
- Institut National de la Santé et de la Recherche Médicale, Unité 1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, Nice F-06204, France.,Université de Nice Sophia-Antipolis, Unité de Formation et de Recherche (UFR) Médecine, Nice F-06000, France
| | - Rachel Paul-Bellon
- Institut National de la Santé et de la Recherche Médicale, Unité 1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, Nice F-06204, France.,Université de Nice Sophia-Antipolis, Unité de Formation et de Recherche (UFR) Médecine, Nice F-06000, France
| | - Véronique Isnard
- Centre Hospitalier Universitaire de Nice, Pôle de Digestif-Obstétrique, Centre de Reproduction, Nice F-06202, France
| | - Emmanuelle Thibault
- Centre Hospitalier Universitaire de Nice, Pôle de Biologie, Centre de Reproduction, Nice F-06202, France
| | - André Bongain
- Centre Hospitalier Universitaire de Nice, Pôle de Digestif-Obstétrique, Centre de Reproduction, Nice F-06202, France
| | - Daniel Chevallier
- Université de Nice Sophia-Antipolis, Unité de Formation et de Recherche (UFR) Médecine, Nice F-06000, France.,Centre Hospitalier Universitaire de Nice, Pôle d'Urologie, Service d'Urologie, Nice F-06202, France
| | - Emanuela Repetto
- Université de Nice Sophia-Antipolis, Unité de Formation et de Recherche (UFR) Médecine, Nice F-06000, France.,Institut National de la Santé et de la Recherche Médicale, Unité 1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 10, Nice F-06204, France
| | - Michele Trabucchi
- Université de Nice Sophia-Antipolis, Unité de Formation et de Recherche (UFR) Médecine, Nice F-06000, France.,Institut National de la Santé et de la Recherche Médicale, Unité 1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 10, Nice F-06204, France
| | - Jean-François Michiels
- Université de Nice Sophia-Antipolis, Unité de Formation et de Recherche (UFR) Médecine, Nice F-06000, France.,Centre Hospitalier Universitaire de Nice, Pôle de Biologie, Service d'Anatomie et de Cytologie Pathologiques, Nice F-06202, France
| | - Catherine Yzydorczyk
- Division of Paediatrics & DOHaD Laboratory, CHUV & University of Lausanne, CH-1011, Switzerland
| | - Umberto Simeoni
- Division of Paediatrics & DOHaD Laboratory, CHUV & University of Lausanne, CH-1011, Switzerland
| | | | - Claire Mauduit
- Institut National de la Santé et de la Recherche Médicale, Unité 1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, Nice F-06204, France.,Université Lyon 1, UFR Médecine Lyon Sud, Lyon F-69921, France.,Hospices Civils de Lyon, Hopital Lyon Sud, Laboratoire d'Anatomie et de Cytologie Pathologiques, Pierre-Bénite F-69495, France
| | - Mohamed Benahmed
- Institut National de la Santé et de la Recherche Médicale, Unité 1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, Nice F-06204, France.,Université de Nice Sophia-Antipolis, Unité de Formation et de Recherche (UFR) Médecine, Nice F-06000, France.,Centre Hospitalier Universitaire de Nice, Département de Recherche Clinique et d'Innovation, Nice F-06001, France
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237
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Espina C, Straif K, Friis S, Kogevinas M, Saracci R, Vainio H, Schüz J. Quatrième Code européen contre le cancer : environnement, profession et cancer. PSYCHO-ONCOLOGIE 2016. [DOI: 10.1007/s11839-016-0579-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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238
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Karimi K, Lindgren TH, Koch CA, Brodell RT. Obesity as a risk factor for malignant melanoma and non-melanoma skin cancer. Rev Endocr Metab Disord 2016; 17:389-403. [PMID: 27832418 DOI: 10.1007/s11154-016-9393-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The dramatic increases in incidence of both obesity and many cancers including skin cancer emphasize the need to better understand the pathophysiology of both conditions and their connections. Melanoma is considered the fastest growing cancer and rates of non-melanoma skin cancer have also increased over the last decade. The molecular mechanisms underlying the association between obesity and skin cancer are not clearly understood but emerging evidence points to changes in the tumor microenvironment including aberrant cell signaling and genomic instability in the chronic inflammatory state many obese individuals experience. This article reviews the literature linking obesity to melanoma and non-melanoma skin cancer.
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Affiliation(s)
- K Karimi
- School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - T H Lindgren
- School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - C A Koch
- Division of Endocrinology, University of Mississippi Medical Center, Jackson, MS, USA
- Cancer Institute, University of Mississippi Medical Center, Jackson, MS, USA
- G.V. (Sonny) Montgomery VA Medical Center, Jackson, MS, USA
| | - Robert T Brodell
- Department of Dermatology, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS, 39216, USA.
- Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA.
- Department of Dermatology, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA.
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239
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Han L, Hsu WW, Todem D, Osuch J, Hungerink A, Karmaus W. In utero exposure to polychlorinated biphenyls is associated with decreased fecundability in daughters of Michigan female fisheaters: a cohort study. Environ Health 2016; 15:92. [PMID: 27576526 PMCID: PMC5006410 DOI: 10.1186/s12940-016-0175-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Accepted: 08/23/2016] [Indexed: 05/22/2023]
Abstract
BACKGROUND Multiple studies have suggested a relationship between adult exposures to environmental organochlorines and fecundability. There is a paucity of data, however, regarding fetal exposure to organochlorines via the mother's blood and fecundability of adult female offspring. METHODS Data from a two-generation cohort of maternal fisheaters was investigated to assess female offspring fecundability. Serum concentrations of polychlorinated biphenyls (PCBs) and 1,1-bis-(4-chlorophenyl)-2,2-dichloroethene (DDE) in Michigan female anglers were serially measured between 1973 and 1991 and used to estimate in utero exposure in their female offspring using two different methods. The angler cohort included 391 women of whom 259 provided offspring information. Of 213 daughters aged 20-50, 151 participated (71 %) and provided information for time intervals of unprotected intercourse (TUI). The daughters reported 308 TUIs (repeated observations), of which 288 ended in pregnancy. We estimated the fecundability ratio (FR) for serum-PCB and serum-DDE adjusting for confounders and accounting for repeated measurements. An FR below one indicates a longer time to pregnancy. RESULTS Compared to serum-PCB of <2.5 μg/L, the FR was 0.60 for serum-PCB between 2.5-7.4 μg/L [95 % confidence intervals (CI) 0.36, 0.99], and 0.42 [95 % CI 0.20, 0.88] for serum-PCB >7.4 μg/L. Similar results were obtained using the alternative statistical method to estimate in utero serum-PCB. The association was stronger for TUIs when women planned a baby; FR = 0.50 for serum-PCB between 2.5-7.4 μg/L, [95 % CI 0.29, 0.89], and 0.30 [95 % CI 0.13, 0.68] for serum-PCB >7.4 μg/L. There was no relationship between in utero exposure to DDE and fecundability in daughters. CONCLUSIONS Decreased fecundability in female offspring of fisheaters was found to be associated with PCB exposure in utero, possibly related to endocrine disruption in the oocyte and/or other developing organs influencing reproductive capacity in adulthood.
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Affiliation(s)
- Lisa Han
- Department of Pathology, University of Chicago Pritzker School of Medicine, Chicago, IL USA
| | - Wei-Wen Hsu
- Department of Statistics, Kansas State University, Manhattan, KS USA
| | - David Todem
- Department of Epidemiology and Biostatistics, College of Human Medicine, Michigan State University, East Lansing, MI USA
| | - Janet Osuch
- Departments of Surgery and Epidemiology and Biostatistics, College of Human Medicine, Michigan State University, 909 Fee Road Room 632, 48824 East Lansing, MI USA
| | - Angela Hungerink
- (formerly of) Department of Epidemiology and Biostatistics, College of Human Medicine, Michigan State University, East Lansing, MI USA
| | - Wilfried Karmaus
- Division of Epidemiology, Biostatistics, and Environmental Health, School of Public Health, University of Memphis, Memphis, USA
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240
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Hijazi A, Guan H, Yang K. Bisphenol A suppresses glucocorticoid target gene (ENaCγ) expression via a novel ERβ/NF-κB/GR signalling pathway in lung epithelial cells. Arch Toxicol 2016; 91:1727-1737. [DOI: 10.1007/s00204-016-1807-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 08/04/2016] [Indexed: 01/13/2023]
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241
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Kraus WL. Editorial: Centennial Celebration - A Focus on Endocrine Disrupting Chemicals… One Hundred Years in the Making. Mol Endocrinol 2016; 30:827-8. [PMID: 27477638 DOI: 10.1210/me.2016-1097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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242
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Fischer C, Mamillapalli R, Goetz LG, Jorgenson E, Ilagan Y, Taylor HS. Bisphenol A (BPA) Exposure In Utero Leads to Immunoregulatory Cytokine Dysregulation in the Mouse Mammary Gland: A Potential Mechanism Programming Breast Cancer Risk. HORMONES & CANCER 2016; 7:241-51. [PMID: 26911702 PMCID: PMC10726733 DOI: 10.1007/s12672-016-0254-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 02/05/2016] [Indexed: 12/27/2022]
Abstract
Bisphenol-A (BPA) is a ubiquitous estrogen-like endocrine disrupting compound (EDC). BPA exposure in utero has been linked to breast cancer and abnormal mammary gland development in mice. The recent rise in incidence of human breast cancer and decreased age of first detection suggests a possible environmental etiology. We hypothesized that developmental programming of carcinogenesis may involve an aberrant immune response. Both innate and adaptive immunity play a role in tumor suppression through cytolytic CD8, NK, and Th1 T-cells. We hypothesized that BPA exposure in utero would lead to dysregulation of both innate and adaptive immunity in the mammary gland. CD1 mice were exposed to BPA in utero during gestation (days 9-21) via osmotic minipump. At 6 weeks, the female offspring were ovariectomized and estradiol was given at 8 weeks. RNA and protein were extracted from the posterior mammary glands, and the mRNA and protein levels were measured by PCR array, qRT-PCR, and western blot. In mouse mammary tissue, BPA exposure in utero significantly decreased the expression of members of the chemokine CXC family (Cxcl2, Cxcl4, Cxcl14, and Ccl20), interleukin 1 (Il1) gene family (Il1β and Il1rn), interleukin 2 gene family (Il7 receptor), and interferon gene family (interferon regulatory factor 9 (Irf9), as well as immune response gene 1 (Irg1). Additionally, BPA exposure in utero decreased Esr1 receptor gene expression and increased Esr2 receptor gene expression. In utero exposure of BPA resulted in significant changes to inflammatory modulators within mammary tissue. We suggest that dysregulation of inflammatory cytokines, both pro-inflammatory and anti-inflammatory, leads to a microenvironment that may promote disordered cell growth through inhibition of the immune response that targets cancer cells.
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Affiliation(s)
- Catha Fischer
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, 333 Cedar Street, P.O. Box 208063, New Haven, CT, 06510, USA
| | - Ramanaiah Mamillapalli
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, 333 Cedar Street, P.O. Box 208063, New Haven, CT, 06510, USA.
| | - Laura G Goetz
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, 333 Cedar Street, P.O. Box 208063, New Haven, CT, 06510, USA
| | - Elisa Jorgenson
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, 333 Cedar Street, P.O. Box 208063, New Haven, CT, 06510, USA
| | - Ysabel Ilagan
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, 333 Cedar Street, P.O. Box 208063, New Haven, CT, 06510, USA
| | - Hugh S Taylor
- Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale School of Medicine, 333 Cedar Street, P.O. Box 208063, New Haven, CT, 06510, USA
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, 06520, USA
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243
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Mišík M, Kundi M, Pichler C, Filipic M, Rainer B, Mišíková K, Nersesyan A, Knasmueller S. Impact of common cytostatic drugs on pollen fertility in higher plants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:14730-14738. [PMID: 25779110 DOI: 10.1007/s11356-015-4301-5] [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: 10/22/2014] [Accepted: 03/02/2015] [Indexed: 06/04/2023]
Abstract
Cytostatic drugs are among the most toxic chemicals which are produced. Many of them cause damage of the genetic material which may affect the fertility of higher organisms. To study the impact of the widely used anticancer drugs [cisplatin (CisPt), etoposide (Et), and 5-fluorouracil (5-FU)] on the reproduction of higher plants, pollen abortion experiments were conducted with species which belong to major plant families, namely with Tradescantia paludosa (Commelinaceae), Arabidopsis thaliana (Brassicaceae), Chelidonium majus (Papaveraceae), and Alisma plantago-aquatica (Alismataceae). All compounds increased the frequencies of abortive grains. The lowest effective doses were in general in a narrow range (i.e., 1 and 10 mg/kg of dry soil). The effects of the individual drugs were similar in T. paludosa, A. plantago-aquatica, and Ch. majus, while A. thaliana was consistently less sensitive. The highest abortion rate was obtained in most experiments with CisPt, followed by 5-FU and Et. Comparisons of the doses which caused effects in the present experiments in the different species with the predicted environment concentrations and with the levels of the cytostatics which were detected in hospital wastewaters show that the realistic environmental concentrations of the drugs are 4-6 orders of magnitude lower. Therefore, it is unlikely that these drugs affect the fertility of higher plants in aquatic and terrestrial ecosystems.
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Affiliation(s)
- Miroslav Mišík
- Institute for Cancer Research, Department of Internal Medicine I, Comprehensive Cancer Center, Medical University of Vienna, 1090, Vienna, Austria
| | - Michael Kundi
- Institute of Environmental Health, Medical University of Vienna, Center for Public Health, Kinderspitalgasse 15, 1090, Vienna, Austria
| | - Clemens Pichler
- Institute for Cancer Research, Department of Internal Medicine I, Comprehensive Cancer Center, Medical University of Vienna, 1090, Vienna, Austria
| | | | - Bernhard Rainer
- Institute for Cancer Research, Department of Internal Medicine I, Comprehensive Cancer Center, Medical University of Vienna, 1090, Vienna, Austria
| | - Katarina Mišíková
- Department of Botany, Faculty of Natural Sciences, Comenius University, Bratislava, Slovakia
| | - Armen Nersesyan
- Institute for Cancer Research, Department of Internal Medicine I, Comprehensive Cancer Center, Medical University of Vienna, 1090, Vienna, Austria
| | - Siegfried Knasmueller
- Institute for Cancer Research, Department of Internal Medicine I, Comprehensive Cancer Center, Medical University of Vienna, 1090, Vienna, Austria.
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244
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Strong AL, Miller DFB, Buechlein AM, Fang F, Glowacki J, McLachlan JA, Nephew KP, Burow ME, Bunnell BA. Bisphenol A alters the self-renewal and differentiation capacity of human bone-marrow-derived mesenchymal stem cells. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/23273747.2016.1200344] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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245
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Scognamiglio V, Antonacci A, Patrolecco L, Lambreva MD, Litescu SC, Ghuge SA, Rea G. Analytical tools monitoring endocrine disrupting chemicals. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.04.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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246
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Petkov PI, Schultz TW, Donner EM, Honma M, Morita T, Hamada S, Wakata A, Mishima M, Maniwa J, Todorov M, Kaloyanova E, Kotov S, Mekenyan OG. Integrated approach to testing and assessment for predicting rodent genotoxic carcinogenicity. J Appl Toxicol 2016; 36:1536-1550. [DOI: 10.1002/jat.3338] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 03/18/2016] [Accepted: 03/23/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Petko I. Petkov
- Laboratory of Mathematical Chemistry (LMC); As. Zlatarov University; Bourgas Bulgaria
| | - Terry W. Schultz
- College of Veterinary Medicine; The University of Tennessee; Knoxville TN 37996-4500 USA
| | - E. Maria Donner
- DuPont Haskell Global Centers for Health and Environmental Sciences, Newark; DE USA
| | - Masamitsu Honma
- Division of Genetics and Mutagenesis; National Institute of Health Sciences; Tokyo Japan
| | - Takeshi Morita
- Division of Risk Assessment; National Institute of Health Sciences; Tokyo Japan
| | | | | | - Masayuki Mishima
- Chugai Pharmaceutical Co., Ltd., Fuji Gotemba Research Labs; Shizuoka Japan
| | - Jiro Maniwa
- Clinical Science Division, Research & Development AstraZeneca KK; Osaka Japan
| | - Milen Todorov
- Laboratory of Mathematical Chemistry (LMC); As. Zlatarov University; Bourgas Bulgaria
| | - Elena Kaloyanova
- Laboratory of Mathematical Chemistry (LMC); As. Zlatarov University; Bourgas Bulgaria
| | - Stefan Kotov
- Laboratory of Mathematical Chemistry (LMC); As. Zlatarov University; Bourgas Bulgaria
| | - Ovanes G. Mekenyan
- Laboratory of Mathematical Chemistry (LMC); As. Zlatarov University; Bourgas Bulgaria
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Prenatal Exposure to Perfluoroalkyl Substances and Behavioral Development in Children. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13050511. [PMID: 27213416 PMCID: PMC4881136 DOI: 10.3390/ijerph13050511] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 04/28/2016] [Accepted: 05/09/2016] [Indexed: 01/09/2023]
Abstract
Background: In recent years, prevalence rates of behavioral disorders in children have increased. One factor possibly implied in the etiology of behavioral disorders is exposure to perfluoroalkyl substances (PFASs). The use of PFASs is highly integrated into everyday life, and exposure is ubiquitous. Exposure to PFASs during early life may be particularly harmful, as it represents a critical time window for brain development. However, research in the area is limited, especially among preschool children. The objective of the current study was to explore the relationship between prenatal exposure to several PFASs and behavioral development at the age of 18 months. Methods: Data from the Dutch cohort LINC (Linking Maternal Nutrition to Child Health) were used. Perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) were measured in cord plasma. The total exposure of PFASs was also calculated (ΣPFASs). Behavioral development was assessed with the Child Behavior Checklist 1.5–5 (CBCL 1.5–5). The CBCL scales “Attention Deficit Hyperactivity Disorder” (ADHD) and “Externalizing problems” were used for further analysis. Separate regression models were composed for each combination, in which exposure levels were classified in tertiles. Both whole population and sex-stratified analyses were performed. A family history of ADHD, the educational level, smoking or using alcohol or illicit drugs during pregnancy were considered as confounders. In total, data from 76 mother-child pairs was included. Results: No significant associations were found between prenatal PFAS exposure and ADHD scores in the whole population and in the sex-stratified analyses. With regard to externalizing behavior, a significant negative association was found between the highest levels of ΣPFAS exposure and externalizing problem behavior in the whole population, but only in the crude model. After stratifying for sex, boys in the second and third tertile of exposure to PFOA presented significantly lower scores on the Externalizing Problem Scale than boys with the lowest exposure levels in the adjusted model. Girls exposed to higher levels of ΣPFAS exposure (T2) showed significantly lower scores on the Externalizing Problem Scale, in both crude and adjusted models. No significant associations with PFOS were found. Conclusions: Results from the current study show that prenatal exposure to PFOA was negatively related to externalizing behavior in boys. Results were different for boys and girls, emphasizing that mechanisms at work might be sex-dependent. However, results should be interpreted with caution as the sample size was small.
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Ye M, Beach J, Martin JW, Senthilselvan A. Urinary concentrations of pyrethroid metabolites and its association with lung function in a Canadian general population. Occup Environ Med 2016; 73:119-26. [PMID: 26767521 DOI: 10.1136/oemed-2015-102839] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES While there is increasing concern about the health impact of pyrethroid insecticides, little is known about their effect on lung function. In this cross-sectional study, urinary concentrations of pyrethroid (PYR) metabolites and their associations with lung function were examined among a Canadian general population using data from the Canadian Health Measures Survey (CHMS). METHODS Urinary concentrations of 5 pyrethroid metabolites (3-PBA, 4-F-3-PBA, cis-DCCA, trans-DCCA and cis-DBCA) were available for 5436 CHMS participants aged 6-79 years. Lung function parameters considered were forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), FEV1/FVC ratio and forced expiratory flow between 25% and 75% of FVC. Multiple linear regression analyses were used to examine associations between PYR concentrations and lung function in children (6-11 years), adolescents (12-19 years) and adults (20-79 years), respectively. RESULTS Almost all CHMS participants (99.8%) had PYR metabolites detectable in urine. In multiple linear regression analyses, 1 unit increase in log transformed urinary concentration (nmol/g creatinine) of total pyrethorid metabolites (ΣPYR) was associated with a 17.4 mL reduction in FEV1 (p=0.045) in children, a 37.1 mL reduction in FVC (p=0.05) in adolescents and a 0.3% (p=0.01) increase in FEV1/FVC ratio in adults. CONCLUSIONS These results show evidence of widespread exposures to pyrethroid insecticides among the Canadian general population. Pyrethroid exposures were associated with lower FEV1 in children, lower FVC in adolescents and relatively higher FEV1/FVC ratio in adults. Further research is necessary to confirm the potential effect of pyrethroid insecticides on lung function reported in this study.
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Affiliation(s)
- Ming Ye
- School of Public Health, University of Alberta, Edmonton, Alberta, Canada
| | - Jeremy Beach
- School of Public Health, University of Alberta, Edmonton, Alberta, Canada Division of Preventive Medicine, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Jonathan W Martin
- Division of Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada
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Dogan S, Simsek T. Possible relationship between endocrine disrupting chemicals and hormone dependent gynecologic cancers. Med Hypotheses 2016; 92:84-7. [PMID: 27241264 DOI: 10.1016/j.mehy.2016.04.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Accepted: 04/24/2016] [Indexed: 01/29/2023]
Abstract
The effects of the natural and synthetic estrogens have been studied for a long time but the data regarding estrogen related chemicals (endocrine disrupting chemicals, EDCs) and their effects on reproductive system are scarce. EDCs are hormone like agents that are readily present in the environment, which may alter the endocrine system of humans and animals. Approximately 800 chemicals are known or suspected to have the potential to function as EDC. Potential role of EDCs on reproductive disease has gained attention in medical literature in recent years. We hypothesize that exposure to low doses of EDCs in a chronic manner could cause hormone dependent genital cancers including ovarian and endometrial cancer. Long term exposure to low concentrations of EDCs may exert potentiation effect with each other and even with endogenous estrogens and could inhibit enzymes responsible for estrogen metabolism. Exposure time to these EDCs is essential as we have seen from Diethylstilbestrol experience. Dose-response curves of EDCs are also unpredictable. Hence mode of action of EDCs are more complex than previously thought. In the light of these controversies lower doses of EDCs in long term exposure is not harmless. Possibility of this relationship and this hypothesis merit further investigation especially through in vivo studies that could better show the realistic environmental exposure. With the confirmation of our hypothesis, possible EDCs could be identified and eliminated from general use as a public health measure.
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Affiliation(s)
- Selen Dogan
- Department of Obstetrics and Gynecology, Gynecologic Oncologic Unit, Akdeniz University, Faculty of Medicine, Antalya, Turkey.
| | - Tayup Simsek
- Department of Obstetrics and Gynecology, Gynecologic Oncologic Unit, Akdeniz University, Faculty of Medicine, Antalya, Turkey
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Ye M, Beach J, Martin JW, Senthilselvan A. Urinary Dialkyl Phosphate Concentrations and Lung Function Parameters in Adolescents and Adults: Results from the Canadian Health Measures Survey. ENVIRONMENTAL HEALTH PERSPECTIVES 2016; 124:491-7. [PMID: 26372667 PMCID: PMC4829996 DOI: 10.1289/ehp.1509745] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Accepted: 09/11/2015] [Indexed: 05/14/2023]
Abstract
BACKGROUND Epidemiological studies have reported associations between lung function parameters and organophosphate (OP) pesticide exposures in agricultural occupations, but to our knowledge associations have not been evaluated in general populations. OBJECTIVES We examined associations between OP metabolite dialkyl phosphates (DAPs) and lung function using data from the Canadian Health Measures Survey (CHMS) Cycle 1. METHODS Forced vital capacity (FVC), forced expiratory volume in 1 sec (FEV1), FEV1/FVC ratio, and forced expiratory flow between 25% and 75% of FVC (FEF25%-75%) were measured for 4,446 CHMS participants. Urinary concentrations of six DAP metabolites (DMP, DMTP, DMDTP, DEP, DETP, and DEDTP), smoking status, and other predictors of lung function were also measured in the CHMS-Cycle 1. Multiple linear regression analyses were used to examine the relationship between total DAP concentrations (ΣDAPs) and lung function in adolescents (12-19 years) and adults (20-79 years). RESULTS In adults, estimates from multiple regression analyses suggested that a 1-unit increase on natural logarithmic scale (171% increase on the original scale) in the creatinine-corrected urinary concentration (nanomoles per gram creatinine) of ΣDAP was associated with a 32.6-mL (95% CI: -57.2, -8.1) reduction in FVC, 32.6-mL (95% CI: -59.0, -6.3) reduction in FEV1, 0.2% (95% CI: -0.6, 0.2) reduction in FEV1/FVC ratio, and 53.1-mL/sec (95% CI: -113.9, 7.7) reduction in FEF25%-75%. In adolescents, associations between ΣDAP and FEV1 were closer to the null and positive for FVC, whereas associations with FEV1/FVC and FEF25%-75% were negative, as in adults. However, none of the associations were significant in adolescents. CONCLUSIONS The negative association between ΣDAP and lung function in adult participants suggests a detrimental effect of OP pesticides on lung function in the adult general population. Further studies using prospective designs are warranted to confirm the findings reported in this study. CITATION Ye M, Beach J, Martin JW, Senthilselvan A. 2016. Urinary dialkyl phosphate concentrations and lung function parameters in adolescents and adults: results from the Canadian Health Measures Survey. Environ Health Perspect 124:491-497; http://dx.doi.org/10.1289/ehp.1509745.
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Affiliation(s)
- Ming Ye
- School of Public Health, University of Alberta, Edmonton, Alberta, Canada
| | - Jeremy Beach
- School of Public Health, University of Alberta, Edmonton, Alberta, Canada
- Division of Preventive Medicine, Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Jonathan W. Martin
- Division of Analytical and Environmental Toxicology, Department of Laboratory Medicine and Pathology, Faculty of Medicine & Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Ambikaipakan Senthilselvan
- School of Public Health, University of Alberta, Edmonton, Alberta, Canada
- Address correspondence to A. Senthilselvan, School of Public Health, University of Alberta, 3-276 Edmonton Heath Clinic Academy, 11405–87 Ave., Edmonton, Alberta, T6G 1C9 Canada. Telephone: (780) 492 6505. E-mail:
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