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Wang PW, Huang YF, Wang CH, Fang LJ, Chen ML. Prenatal to preschool exposure of nonylphenol and bisphenol A exposure and neurodevelopment in young children. Pediatr Neonatol 2024; 65:76-84. [PMID: 37679260 DOI: 10.1016/j.pedneo.2023.04.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 04/13/2023] [Accepted: 04/21/2023] [Indexed: 09/09/2023] Open
Abstract
BACKGROUND Nonylphenol (NP) and bisphenol A (BPA) are produced in large quantities worldwide as multipurpose agents. However, studies on relations between NP and BPA exposure and childhood neurodevelopment are few, and the results are inconsistent. This study aimed to investigate associations between prenatal and early childhood NP and BPA exposure and neurodevelopment in mother-child pairs. METHODS Pregnant women at 27-38 weeks' gestation were recruited, as were children 2-3 years of age (n = 94) and 4-6 years of age (n = 56) years. Urine was collected to assess NP and BPA exposure. Bayley Scales of Infant and Toddler Development (3rd edition; Bayley-III), Wechsler Preschool and Primary Scale of Intelligence (4th edition), and the Full Scale Intelligence Quotient (WPPSI-IV-FSIQ) were used to assess the neurodevelopment of the children. RESULTS The detection rate and concentration of NP and BPA in the urine of children 4-6 years old were higher than in those 2-3 years old. Children were divided into a high concentration group (3rd tertile) and a reference group (1st and 2nd tertiles) based on natural log-transformed urine concentration of NP and BPA. Girls' Bayley-III motor scores in the high concentration group were higher than those of the BPA reference group of urine of mothers (β = 6.85, 95% confidence interval [CI]: 1.58-12.13). Boys' FSIQ in the higher concentration group were significantly lower than those in children 2-3 years old in the NP reference group (β = -11.29, 95% CI: -18.62 to -3.96) (all, p < 0.05). CONCLUSIONS Prenatal and childhood exposure to NP and BPA may have different effects on the neurodevelopment of young children, and there are no consistent effects between boys and girls.
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Affiliation(s)
- Pei-Wei Wang
- Institute of Environmental and Occupational Health Sciences, School of Medicine, Yangming Campus, National Yang Ming Chiao Tung University, Taipei, Taiwan; Department of Pediatrics, Heping Fuyou Branch, Taipei City Hospital, Taipei, Taiwan
| | - Yu-Fang Huang
- Institute of Environmental and Occupational Health Sciences, School of Medicine, Yangming Campus, National Yang Ming Chiao Tung University, Taipei, Taiwan.
| | - Chung-Hao Wang
- Department of Pediatrics, Heping Fuyou Branch, Taipei City Hospital, Taipei, Taiwan
| | - Li-Jung Fang
- Department of Pediatrics, Heping Fuyou Branch, Taipei City Hospital, Taipei, Taiwan
| | - Mei-Lien Chen
- Institute of Environmental and Occupational Health Sciences, School of Medicine, Yangming Campus, National Yang Ming Chiao Tung University, Taipei, Taiwan.
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Hood RB, Terrell ML, Mardovich S, Somers EC, Pearson M, Barton H, Tomlinson MS, Marder ME, Barr DB, Marcus M. Polybrominated biphenyls (PBBs) and prevalence of autoimmune disorders among members of the Michigan PBB registry. ENVIRONMENTAL RESEARCH 2023; 239:117312. [PMID: 37806482 PMCID: PMC10843028 DOI: 10.1016/j.envres.2023.117312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/15/2023] [Accepted: 10/04/2023] [Indexed: 10/10/2023]
Abstract
BACKGROUND Polybrominated biphenyls (PBBs), a class of endocrine disrupting chemicals, were the main chemicals present in one of the largest industrial accidents in the United States. We investigated the association between serum PBB-153 levels and autoimmune disorders among members of the Michigan PBB Registry. METHODS Eight hundred and ninety-five members of the registry had both a serum PBB-153 measurement and had completed one or more questionnaires about autoimmune disorders. Autoimmune disorders were examined collectively and within specific organ systems. Sex-stratified unadjusted and adjusted log-binomial models were used to examine the association between tertiles of serum PBB-153 levels and autoimmune disorders. Models were adjusted by lifestage at exposure (in utero, childhood, adulthood), smoking history (never, past, current), and total serum lipid levels (continuous). We utilized cubic spline models to investigate non-linearity between serum PBB-153 levels and the prevalence of autoimmune disorders. RESULTS Approximately 12.9% and 20.7% of male and female participants reported having one or more autoimmune disorders, respectively. After adjustment for potential confounders, we observed no association between PBB-153 tertiles and the composite classification of 'any autoimmune disorder' in either sex. We observed some evidence for an association between serum PBB-153 levels and rheumatoid arthritis in males and females; however, this was not statistically significant in females. We also observed some evidence for an association between serum PBB-153 levels and neurological- and thyroid-related autoimmune disorders in females, but again this was not statistically significant. Additionally, we identified dose-response curves for serum PBB-153 levels and the prevalence of autoimmune disorders that differed by lifestage of exposure and sex. CONCLUSIONS We observed some evidence that increasing serum PBB-153 levels were associated with three specified autoimmune disorders. Studies focusing on these three autoimmune disorders and the potential non-linear trend differences by lifestage of exposure warrant further investigation.
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Affiliation(s)
- Robert B Hood
- Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, GA, USA.
| | - Metrecia L Terrell
- Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, GA, USA
| | - Sarah Mardovich
- Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, GA, USA
| | - Emily C Somers
- Departments of Internal Medicine, Environmental Health Sciences and Obstetrics and Gynecology, University of Michigan, Ann Arbor, MI, USA
| | - Melanie Pearson
- Gangarosa Department of Environmental Health, Emory University Rollins School of Public Health, Atlanta, GA, USA
| | - Hillary Barton
- Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, GA, USA
| | - Martha Scott Tomlinson
- Gangarosa Department of Environmental Health, Emory University Rollins School of Public Health, Atlanta, GA, USA
| | - M Elizabeth Marder
- Department of Environmental Toxicology, University of California, Davis, CA, USA
| | - Dana Boyd Barr
- Gangarosa Department of Environmental Health, Emory University Rollins School of Public Health, Atlanta, GA, USA
| | - Michele Marcus
- Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, GA, USA; Gangarosa Department of Environmental Health, Emory University Rollins School of Public Health, Atlanta, GA, USA
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Daugherty S, Mulabagal V, Hayworth J, Akingbemi BT. Legacy and Emerging Perfluoroalkyl and Polyfluoroalkyl Substances Regulate Steroidogenesis in the Male Gonad. Endocrinology 2023; 164:bqad142. [PMID: 37767721 DOI: 10.1210/endocr/bqad142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/08/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023]
Abstract
Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are widely used in a variety of industrial processes and manufacturing of consumer products. Current efforts by the manufacturing industry will limit use of long-chain or legacy PFAS represented by perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) and replace with short-chain or emerging PFAS such as perfluorobutanoic acid (PFBA) and perfluorobutane sulfonic acid (PFBS). However, there is little to no information on the toxicity of new and emerging PFAS. Therefore, we performed experiments in growing Long-Evans male rats to investigate effects of low-dose prepubertal and pubertal exposures to PFAS on gonadal steroid hormone secretion. The results demonstrated that both legacy and emerging PFAS have the capacity to regulate testicular steroidogenesis. For instance, prepubertal exposures to PFOS, PFBA, and PFBS increased serum and testicular testosterone concentrations. Exposure to PFBA increased testicular 17β-estradiol (E2) concentrations, and PFOS and PFBS both decreased serum E2 concentrations while stimulating testicular E2 secretion. The data also demonstrated additive effects due to legacy and emerging PFAS mixtures compared with the individual chemicals. The gonadal effects due to PFAS exposures occurred at nanomolar concentrations, which approximate PFAS levels in the environment. Taken together, the present study supports the need for development of cost-effective and sustainable filtration media for different processes to remove PFAS from water and other sources of exposure. Current action by regulatory agencies such as the US Environmental Protection Agency to limit use of PFAS in the manufacture of consumer products will protect public health.
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Affiliation(s)
- Samantha Daugherty
- Department of Anatomy, Physiology and Pharmacology, Auburn University, Auburn AL 36849, USA
| | - Vanisree Mulabagal
- Department of Civil and Environmental Engineering, Auburn University, Auburn AL 36849, USA
| | - Joel Hayworth
- Department of Civil and Environmental Engineering, Auburn University, Auburn AL 36849, USA
| | - Benson T Akingbemi
- Department of Anatomy, Physiology and Pharmacology, Auburn University, Auburn AL 36849, USA
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Lu YS, Wen X, Chen J, He XR, Yu J, Qiu J, Qian YZ, Xu YY. Multiomics reveals new biomarkers and mechanistic insights into the combined toxicity effects of 2,2',4,4',5,5'-hexachlorobiphenyl and atrazine exposures in MCF-7 cells. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 333:122030. [PMID: 37336346 DOI: 10.1016/j.envpol.2023.122030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/01/2023] [Accepted: 06/11/2023] [Indexed: 06/21/2023]
Abstract
Humans are constantly exposed to complicated chemical mixtures from the environment and food rather than being exposed to a single pollutant. The underlying mechanisms of the complicated combined toxicity of endocrine disrupting chemicals (EDCs) are still mainly unexplored. In this study, two representative EDCs, 2,2',4,4',5,5'-hexachlorobiphenyl (PCB153) and atrazine (ATZ), were selected to explore their combined effects on MCF-7 cell proliferation at environmental exposure concentrations by an integrated analysis of metabolomics and transcriptomics. The results showed that 1 μM ATZ and PCB153 combined exposure significantly accelerated MCF-7 cell growth by 18.2%. More than 400 metabolites detected by UHPLC-QTOF/MS were used to observe metabolism differences induced by binary mixtures. Metabolomics analysis verified that ATZ and PCB153 exposure alone or in combination could have an additive effect on metabolism and induce significant disruption to glycolysis, purine metabolism and the TCA cycle, which provide energy demand and biosynthetic substrates for cell proliferation. Compared to PCB153 and ATZ exposure alone, a combined effect was observed in purine and pyrimidine metabolic pathways. Hexokinase 3 (HK3) and cytochrome P450 19 subfamily A1 (CYP19A1) were identified as differentially expressed genes based on transcriptomic analysis. By integrating metabolome and transcriptome analysis, the proliferation effects of ATZ and PCB153 were induced at low doses in MCF-7 cells through potential interference with the downstream transcription signaling of CYP19A1. Furthermore, molecular docking indicated that PCB153 and ATZ directly affected CYP19A1. Altogether, the regulation of pivotal metabolites and differentially expressed genes could provide helpful information to reveal the mechanism by which PCB153 and ATZ affect MCF-7 cell proliferation.
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Affiliation(s)
- Yu-Shun Lu
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xing Wen
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, China; Faculty of Printing and Packaging and Digital Media, Xi' an University of Technology, Xi'an, 710048, China
| | - Ju Chen
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, China; Faculty of Printing and Packaging and Digital Media, Xi' an University of Technology, Xi'an, 710048, China
| | - Xiao-Rong He
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, China; Faculty of Printing and Packaging and Digital Media, Xi' an University of Technology, Xi'an, 710048, China
| | - Jiang Yu
- Faculty of Printing and Packaging and Digital Media, Xi' an University of Technology, Xi'an, 710048, China
| | - Jing Qiu
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yong-Zhong Qian
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yan-Yang Xu
- Key Laboratory of Agro-Product Quality and Safety, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
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5
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Dunder L, Salihovic S, Elmståhl S, Lind PM, Lind L. Associations between per- and polyfluoroalkyl substances (PFAS) and diabetes in two population-based cohort studies from Sweden. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2023; 33:748-756. [PMID: 36964247 PMCID: PMC10541316 DOI: 10.1038/s41370-023-00529-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 02/03/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Per- and polyfluoroalkyl substances (PFAS) have been suggested to contribute to the development of metabolic diseases such as obesity, diabetes and non-alcoholic fatty liver disease (NAFLD). However, evidence from epidemiological studies remain divergent. The aim of the present study was to evaluate associations between PFAS exposure and prevalent diabetes in a cross-sectional analysis and fasting glucose in a longitudinal analysis. METHODS In 2373 subjects aged 45-75 years from the EpiHealth study, three PFAS; perfluorohexanesulfonic acid (PFHxS), perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) were analyzed in plasma together with information on prevalent diabetes. Participants in the PIVUS study (n = 1016 at baseline, all aged 70 years) were followed over 10 years regarding changes in plasma levels of six PFAS; PFHxS, PFOA, PFOS, perfluorononanoic acid (PFNA), perfluorodecanoic acid (PFDA), and perfluoroundecanoic acid (PFUnDA), and changes in plasma levels of fasting glucose. RESULTS In the EpiHealth study, no overall associations could be observed between the levels of PFOA, PFOS or PFHxS and prevalent diabetes. However, there was a significant sex-interaction for PFOA (p = 0.02), and an inverse association could be seen between PFOA (on a SD-scale) and prevalent diabetes in women only (OR: 0.71, 95% CI: 0.52, 0.96, p-value: 0.02). This association showed a non-monotonic dose-response curve. In the PIVUS study, inverse relationships could be observed between the changes in levels (ln-transformed) of PFOA and PFUnDA vs the change in fasting glucose levels (ln-transformed) over 10 years (p = 0.04 and p = 0.02, respectively). As in EpiHealth, these inverse associations were significant only in women (PFOA: β: -0.03, p = 0.02, PFUnDA: β: -0.03, p = 0.03). IMPACT Exposure to per- and polyfluoroalkyl substances (PFAS) has been linked to unfavorable human health, including metabolic disorders such as obesity, diabetes and non-alcoholic fatty liver disease. However, results from in vivo, in vitro and epidemiological studies are incoherent. The aim of the present study was therefore to investigate associations between PFAS and diabetes in a cross-sectional study and glucose levels in a longitudinal study. Results show inverse associations in women only. Results also display non-monotonic dose response curves (i.e., that only low levels of PFOA are related to higher probability of prevalent diabetes). This suggests that sex differences and complex molecular mechanisms may underlie the observed findings. A better understanding of the factors and molecular mechanisms contributing to such differences is recognized as an important direction for future research. CONCLUSIONS PFOA was found to be inversely related to both prevalent diabetes and changes in plasma glucose levels among women only. Thus, our findings suggest there are sex differences in the inverse relationship of PFOA and type 2 diabetes and glucose levels.
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Affiliation(s)
- Linda Dunder
- Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden.
| | | | - Sölve Elmståhl
- Division of Geriatric Medicine, Department of Clinical Sciences in Malmö, Lund University, Malmö, Sweden
| | - P Monica Lind
- Department of Medical Sciences, Occupational and Environmental Medicine, Uppsala University, Uppsala, Sweden
| | - Lars Lind
- Department of Medical Sciences, Cardiovascular Epidemiology, Uppsala University, Uppsala, Sweden
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Peluso T, Nittoli V, Reale C, Porreca I, Russo F, Roberto L, Giacco A, Silvestri E, Mallardo M, De Felice M, Ambrosino C. Chronic Exposure to Chlorpyrifos Damages Thyroid Activity and Imbalances Hepatic Thyroid Hormones Signaling and Glucose Metabolism: Dependency of T3-FOXO1 Axis by Hyperglycemia. Int J Mol Sci 2023; 24:ijms24119582. [PMID: 37298533 DOI: 10.3390/ijms24119582] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 05/08/2023] [Accepted: 05/26/2023] [Indexed: 06/12/2023] Open
Abstract
Early life exposure to Endocrine Disruptor Chemicals (EDCs), such as the organophosphate pesticide Chlorpyrifos (CPF), affects the thyroid activity and dependent process, including the glucose metabolism. The damage of thyroid hormones (THs) as a mechanism of action of CPF is underestimated because the studies rarely consider that TH levels and signaling are customized peripherally. Here, we investigated the impairment of metabolism/signaling of THs and lipid/glucose metabolism in the livers of 6-month-old mice, developmentally and lifelong exposed to 0.1, 1, and 10 mg/kg/die CPF (F1) and their offspring similarly exposed (F2), analyzing the levels of transcripts of the enzymes involved in the metabolism of T3 (Dio1), lipids (Fasn, Acc1), and glucose (G6pase, Pck1). Both processes were altered only in F2 males, affected by hypothyroidism and by a systemic hyperglycemia linked to the activation of gluconeogenesis in mice exposed to 1 and 10 mg/kg/die CPF. Interestingly, we observed an increase in active FOXO1 protein due to a decrease in AKT phosphorylation, despite insulin signaling activation. Experiments in vitro revealed that chronic exposure to CPF affected glucose metabolism via the direct modulation of FOXO1 activity and T3 levels in hepatic cells. In conclusion, we described different sex and intergenerational effects of CPF exposure on the hepatic homeostasis of THs, their signaling, and, finally, glucose metabolism. The data points to FOXO1-T3-glucose signaling as a target of CPF in liver.
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Affiliation(s)
- Teresa Peluso
- Department of Science and Technology, University of Sannio, Via de Sanctis, 82100 Benevento, Italy
- Biogem Scarl, Institute of Molecular Biology and Genetics Research, Via Camporeale, 83031 Ariano Irpino, Italy
| | - Valeria Nittoli
- Biogem Scarl, Institute of Molecular Biology and Genetics Research, Via Camporeale, 83031 Ariano Irpino, Italy
| | - Carla Reale
- Biogem Scarl, Institute of Molecular Biology and Genetics Research, Via Camporeale, 83031 Ariano Irpino, Italy
| | - Immacolata Porreca
- Biogem Scarl, Institute of Molecular Biology and Genetics Research, Via Camporeale, 83031 Ariano Irpino, Italy
| | - Filomena Russo
- Biogem Scarl, Institute of Molecular Biology and Genetics Research, Via Camporeale, 83031 Ariano Irpino, Italy
| | - Luca Roberto
- Biogem Scarl, Institute of Molecular Biology and Genetics Research, Via Camporeale, 83031 Ariano Irpino, Italy
| | - Antonia Giacco
- Department of Science and Technology, University of Sannio, Via de Sanctis, 82100 Benevento, Italy
| | - Elena Silvestri
- Department of Science and Technology, University of Sannio, Via de Sanctis, 82100 Benevento, Italy
| | - Massimo Mallardo
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", Via Pansini 5, 80131 Naples, Italy
| | - Mario De Felice
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", Via Pansini 5, 80131 Naples, Italy
- Institute of Experimental Endocrinology and Oncology (IEOS), CNR, Via Pansini 6, 80131 Naples, Italy
| | - Concetta Ambrosino
- Department of Science and Technology, University of Sannio, Via de Sanctis, 82100 Benevento, Italy
- Biogem Scarl, Institute of Molecular Biology and Genetics Research, Via Camporeale, 83031 Ariano Irpino, Italy
- Institute of Experimental Endocrinology and Oncology (IEOS), CNR, Via Pansini 6, 80131 Naples, Italy
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Sun Y, Liu Z, Zhang W, Lin H, Li Q, Liu C, Zhang C. Paternal genetic effects of cadmium exposure during pregnancy on hormone synthesis disorders in ovarian granulosa cells of offspring. J Ovarian Res 2023; 16:98. [PMID: 37194017 DOI: 10.1186/s13048-023-01175-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 04/25/2023] [Indexed: 05/18/2023] Open
Abstract
The aim of this study was to investigate the paternal genetic intergenerational and transgenerational genetic effects of cadmium (Cd) exposure during pregnancy on estradiol (E2) and progesterone (Pg) synthesis in the ovarian granulosa cells (GCs) of offspring. Pregnant SD rats were intragastrically exposed to CdCl2 (0, 0.5, 2.0, 8.0 mg/kg) from days 1 to 20 to produce the F1 generation, F1 males were mated with newly purchased females to produce the F2 generation, and the F3 generation was obtained in the same way. Using this model, Cd-induced hormone synthesis disorders in GCs of F1 have been observed [8]. In this study, altered serum E2 and Pg levels in both F2 and F3 generations showed a nonmonotonic dose‒response relationship. In addition, hormone synthesis-related genes (Star, Cyp11a1, Cyp17a1, Cyp19a1, Sf-1) and miRNAs were observed to be altered in both F2 and F3. No differential changes in DNA methylation modifications of hormone synthesis-related genes were observed, and only the Adcy7 was hypomethylated. In summary, paternal genetic intergenerational and transgenerational effects exist in ovarian GCs E2 and Pg synthesis disorders induced by Cd during pregnancy. In F2, the upregulation of StAR and CYP11A1, and changes in the miR-27a-3p, miR-27b-3p, and miR-146 families may be important, while changes in the miR-10b-5p and miR-146 families in F3 may be important.
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Affiliation(s)
- Yi Sun
- Department of Preventive Medicine, Fujian Provincial Key Laboratory of Environmental Factors and Cancer, Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou, 350122, Fujian Province, China
- Key Laboratory of Environment and Female Reproductive Health, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Zhangpin Liu
- Department of Preventive Medicine, Fujian Provincial Key Laboratory of Environmental Factors and Cancer, Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou, 350122, Fujian Province, China
| | - Wenchang Zhang
- Department of Preventive Medicine, Fujian Provincial Key Laboratory of Environmental Factors and Cancer, Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou, 350122, Fujian Province, China.
| | - Hao Lin
- Fuzhou Center for Disease Control and Prevention, Fuzhou, 350005, Fujian Province, China
| | - Qingyu Li
- Department of Preventive Medicine, Fujian Provincial Key Laboratory of Environmental Factors and Cancer, Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou, 350122, Fujian Province, China
| | - Chenchen Liu
- Department of Preventive Medicine, Fujian Provincial Key Laboratory of Environmental Factors and Cancer, Key Laboratory of Environment and Health, School of Public Health, Fujian Medical University, Fuzhou, 350122, Fujian Province, China
| | - Chenyun Zhang
- School of Health Management, Fujian Medical University, Fuzhou, 350122, Fujian Province, China.
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8
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Vandenberg LN, Zoeller RT, Prins GS, Trasande L. Evaluating adverse effects of environmental agents in food: a brief critique of the US FDA's criteria. Environ Health 2023; 22:38. [PMID: 37085808 PMCID: PMC10120250 DOI: 10.1186/s12940-023-00971-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 02/12/2023] [Indexed: 05/03/2023]
Abstract
BACKGROUND In the US, the Food and Drug Administration (US FDA) is charged with protecting the safety of food from both pathogens and chemicals used in food production and food packaging. To protect the public in a transparent manner, the FDA needs to have an operational definition of what it considers to be an "adverse effect" so that it can take action against harmful agents. The FDA has recently published two statements where, for the first time, it defines the characteristics of an adverse effect that it uses to interpret toxicity studies. OBJECTIVE In this brief review, we examine two recent actions by the FDA, a proposed rule regarding a color additive used in vegetarian burgers and a decision not to recall fish with high levels of scombrotoxin. We evaluated the FDA's description of the criteria used to determine which outcomes should be considered adverse. OVERVIEW We describe three reasons why the FDA's criteria for "adverse effects" is not public health protective. These include an unscientific requirement for a monotonic dose response, which conflates hazard assessment and dose response assessment while also ignoring evidence for non-linear and non-monotonic effects for many environmental agents; a requirement that the effect be observed in both sexes, which fails to acknowledge the many sex- and gender-specific effects on physiology, disease incidence and severity, and anatomy; and a requirement that the effects are irreversible, which does not acknowledge the role of exposure timing or appreciate transgenerational effects that have been demonstrated for environmental chemicals. CONCLUSIONS The FDA's criteria for identifying adverse effects are inadequate because they are not science-based. Addressing this is important, because the acknowledgement of adverse effects is central to regulatory decisions and the protection of public health.
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Affiliation(s)
- Laura N Vandenberg
- Department of Environmental Health Sciences, School of Public Health and Health Sciences, University of Massachusetts - Amherst, 240G Goessmann, 686 N. Pleasant Street, Amherst, MA, 01003, USA.
| | - R Thomas Zoeller
- Department of Biology, University of Massachusetts Amherst, Amherst, MA, USA
- Visiting Professor, Örebro University, Örebro, Sweden
| | - Gail S Prins
- Department of Urology, School of Medicine, Division of Epidemiology & Biostatistics, School of Public Health, University of Illinois at Chicago, Chicago, USA
| | - Leonardo Trasande
- Departments of Pediatrics, Environmental Medicine, and Population Health, New York University School of Medicine, New York, NY, USA
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9
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Vieyra G, Hankinson SE, Oulhote Y, Vandenberg LN, Tinker L, Manson JE, Shadyab AH, Thomson CA, Bao W, Allison M, Odegaard AO, Reeves KW. Association between urinary phthalate biomarker concentrations and adiposity among postmenopausal women. ENVIRONMENTAL RESEARCH 2023; 222:115356. [PMID: 36706896 PMCID: PMC9974871 DOI: 10.1016/j.envres.2023.115356] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/18/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Obesity is a leading risk factor for chronic diseases, potentially related to excess abdominal adiposity. Phthalates are environmental chemicals that have been suggested to act as obesogens, driving obesity risk. For the associations between phthalates and adiposity, prior studies have focused primarily on body mass index. We hypothesize that more refined measures of adiposity and fat distribution may provide greater insights into these associations given the role of central adiposity in chronic disease risk. OBJECTIVES To evaluate associations between urinary phthalate biomarkers and both visceral and subcutaneous adipose tissue (VAT and SAT) among postmenopausal women enrolled in the Women's Health Initiative (WHI). METHODS We included 1125 WHI participants with available, coincident measurements of urinary phthalate biomarkers (baseline, year 3) and VAT and SAT (baseline, year 3, year 6). VAT and SAT measurements were estimated from DXA scans. Multilevel mixed-effects models estimated the prospective associations between urinary phthalate biomarkers at baseline and VAT and SAT three years later. RESULTS In multivariable adjusted models, we observed positive associations between some phthalate biomarkers, including the sum of di-isobutyl phthalate (ΣDiBP) biomarkers, MCNP, and ΣDEHP, with VAT three years later. For example, we observed positive associations between concentrations of ΣDiBP and VAT (Q4 vs Q1 β = 7.15, 95% CI -1.76-16.06; Q3 vs Q1 β = 10.94, 95% CI 3.55-18.33). Associations were generally attenuated but remained significant after additional adjustment for SAT. MBzP was positively associated with SAT. Other phthalate biomarkers investigated (MEP, MCOP, MCPP, ΣDBP) were not significantly associated with VAT or SAT. DISCUSSION Based on robust measures of adiposity, this study provides supportive evidence that higher urinary concentrations of select phthalate compounds were associated with higher VAT levels over time in postmenopausal women. Efforts to replicate these findings are needed.
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Affiliation(s)
- Gabriela Vieyra
- Department of Biostatistics and Epidemiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - Susan E Hankinson
- Department of Biostatistics and Epidemiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - Youssef Oulhote
- Department of Biostatistics and Epidemiology, University of Massachusetts Amherst, Amherst, MA, USA
| | - Laura N Vandenberg
- Department of Environmental Health Sciences, University of Massachusetts Amherst, Amherst, MA, USA
| | - Lesley Tinker
- Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - JoAnn E Manson
- Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Aladdin H Shadyab
- Herbert Wertheim School of Public Health and Human Longevity Science, University of California, San Diego, La Jolla, CA, USA
| | - Cynthia A Thomson
- Department of Health Promotion Sciences, Mel & Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ, USA
| | - Wei Bao
- Institute of Public Health, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Matthew Allison
- Department of Family Medicine, Division of Preventive Medicine, University of California San Diego, La Jolla, CA, USA
| | - Andrew O Odegaard
- Department of Epidemiology and Biostatistics, University of California Irvine, Irvine, CA, USA
| | - Katherine W Reeves
- Department of Biostatistics and Epidemiology, University of Massachusetts Amherst, Amherst, MA, USA.
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da Costa Souza F, Grodzki ACG, Morgan RK, Zhang Z, Taha AY, Lein PJ. Oxidized linoleic acid metabolites regulate neuronal morphogenesis in vitro. Neurochem Int 2023; 164:105506. [PMID: 36758902 PMCID: PMC10495953 DOI: 10.1016/j.neuint.2023.105506] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 02/04/2023] [Accepted: 02/06/2023] [Indexed: 02/10/2023]
Abstract
Linoleic acid (LA, 18:2n-6) is an essential nutrient for optimal infant growth and brain development. The effects of LA in the brain are thought to be mediated by oxygenated metabolites of LA known as oxidized LA metabolites (OXLAMs), but evidence is lacking to directly support this hypothesis. This study investigated whether OXLAMs modulate key neurodevelopmental processes including axon outgrowth, dendritic arborization, cell viability and synaptic connectivity. Primary cortical neuron-glia co-cultures from postnatal day 0-1 male and female rats were exposed for 48h to the following OXLAMs: 1) 13-hydroxyoctadecadienoic acid (13-HODE); 2) 9-hydroxyoctadecadienoic acid (9-HODE); 3) 9,10-dihydroxyoctadecenoic acid (9,10-DiHOME); 4) 12(13)-epoxyoctadecenoic acid (12(13)-EpOME); 5) 9,10,13-trihydroxyoctadecenoic acid (9,10,13-TriHOME); 6) 9-oxo-octadecadienoic acid (9-OxoODE); and 7) 12,13-dihydroxyoctadecenoic acid (12,13-DiHOME). Axonal outgrowth, evaluated by Tau-1 immunostaining, was increased by 9-HODE, but decreased by 12,13-DiHOME in male but not female neurons. Dendrite arborization, evaluated by MAP2B-eGFP expression, was affected by 9-HODE, 9-OxoODE, and 12(13)-EpOME in male neurons and, by 12(13)-EpOME in female neurons. Neither cell viability nor synaptic connectivity were significantly altered by OXLAMs. Overall, this study shows select OXLAMs modulate neuron morphology in a sex-dependent manner, with male neurons being more susceptible.
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Affiliation(s)
- Felipe da Costa Souza
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California, Davis, CA, USA; Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA, USA.
| | - Ana Cristina G Grodzki
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA, USA.
| | - Rhianna K Morgan
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA, USA.
| | - Zhichao Zhang
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California, Davis, CA, USA.
| | - Ameer Y Taha
- Department of Food Science and Technology, College of Agriculture and Environmental Sciences, University of California, Davis, CA, USA.
| | - Pamela J Lein
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA, USA.
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11
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Shi Z, Xia M, Xiao S, Zhang Q. Identification of nonmonotonic concentration-responses in Tox21 high-throughput screening estrogen receptor assays. Toxicol Appl Pharmacol 2022; 452:116206. [PMID: 35988584 PMCID: PMC9452481 DOI: 10.1016/j.taap.2022.116206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/11/2022] [Accepted: 08/15/2022] [Indexed: 10/15/2022]
Abstract
Environmental endocrine-disrupting chemicals (EDCs) interfere with the metabolism and actions of endogenous hormones. It has been well documented in numerous in vivo and in vitro studies that EDCs can exhibit nonmonotonic dose response (NMDR) behaviors. Not conforming to the conventional linear or linear-no-threshold response paradigm, these NMDR relationships pose practical challenges to the risk assessment of EDCs. In the meantime, the endocrine signaling pathways and biological mechanisms underpinning NMDR remain incompletely understood. The US Tox21 program has conducted in vitro cell-based high-throughput screening assays for estrogen receptors (ER), androgen receptors, and other nuclear receptors, and screened the 10 K-compound library for potential endocrine activities. Using 15 concentrations across several orders of magnitude of concentration range and run in both agonist and antagonist modes, these Tox21 assay datasets contain valuable quantitative information that can be explored to evaluate the nonlinear effects of EDCs and may infer potential mechanisms. In this study we analyzed the concentration-response curves (CRCs) in all 8 Tox21 ERα and ERβ assays by developing clustering and classification algorithms customized to the datasets to identify various shapes of CRCs. After excluding NMDR curves likely caused by cytotoxicity, luciferase inhibition, or autofluorescence, hundreds of compounds were identified to exhibit Bell or U-shaped CRCs. Bell-shaped CRCs are about 7 times more frequent than U-shaped ones in the Tox21 ER assays. Many compounds exhibit NMDR in at least one assay, and some EDCs well-known for their NMDRs in the literature were also identified, suggesting their nonmonotonic effects may originate at cellular levels involving transcriptional ER signaling. The developed computational methods for NMDR identification in ER assays can be adapted and applied to other high-throughput bioassays.
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Affiliation(s)
- Zhenzhen Shi
- Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Menghang Xia
- National Center for Advancing Translational Sciences, NIH, Bethesda, MD, USA
| | - Shuo Xiao
- Department of Pharmacology and Toxicology, Ernest Mario School of Pharmacy, Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ, USA
| | - Qiang Zhang
- Gangarosa Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA.
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Dal’ Bó IF, Teixeira ES, Rabi LT, Peres KC, Nascimento M, Chiamolera MI, Máximo V, Bufalo NE, Ward LS. Alternation between toxic and proliferative effects of Roundup® on human thyroid cells at different concentrations. Front Endocrinol (Lausanne) 2022; 13:904437. [PMID: 35992109 PMCID: PMC9382701 DOI: 10.3389/fendo.2022.904437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 07/05/2022] [Indexed: 11/21/2022] Open
Abstract
Endocrine-disrupting and carcinogenic effects of glyphosate have long been suspected, but little is known about the effect of compounds used in real life at different concentrations, neither in normal nor in thyroid tumor cells. As cancer cells may have different sensitivities and the effect of the product containing glyphosate may be different from that produced by the active ingredient alone, including the Acceptable Occupational Exposure Level (AOEL=160µg/L) and the Acceptable Daily Intake (ADI=830µg/L) determined by ANVISA, we used two human thyroid-derived cell lines, Nthy-ori 3-1 (from normal follicular cells) and TPC-1 (from papillary carcinoma), to test 15 different concentrations of Roundup® Original DI. Trypan blue (TB), CCK-8 and BrdU assays were used to evaluate cytotoxicity, metabolic activity and proliferation with 24h and 48h exposures in technical and biological triplicates. TB showed an important toxic effect, especially after 24h of exposure, in both cell lines. The AOEL concentration caused the death of 43% and 50% of the Nthy-ori and TPC-1 cells, respectively, in 24 h, while ADI resulted in 35% and 58% of cell death. After 48h of exposure, AOEL and ADI caused a lower number of dead Nthy-ori (33% and 18%) and TPC-1 (33% and 37%) cells, respectively, suggesting that the toxic effect of the product disappears and/or both strains have repair mechanisms that protect them from longer exposures. On the other hand, the CCK-8 assay showed that small concentrations of Roundup have a proliferative effect: 6.5µg/L increased the number of both Nthy-ori and TPC-1 cells at 24h, and the BrdU assay confirmed the stimulatory effect with a 321% increase in the absorbance of Nthy-ori cells at 48h. The herbicide produced even more frequent increases in the BrdU absorbance of TPC-1 cells, mainly at 24h. We conclude that thyroid cells exposed to Roundup present a nonmonotonic dual dose-response curve. Low concentrations of the pesticide, considered acceptable, cause significant cell death but also have an important proliferative effect, especially on TPC-1 cells. This herbicide, widely used around the world, may play a role in the increased incidence rate of thyroid nodules and cancer that has been observed in recent decades.
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Affiliation(s)
- Izabela Fernanda Dal’ Bó
- Laboratory of Cancer Molecular Genetics, School of Medical Sciences, University of Campinas, Campinas, Brazil
| | - Elisângela Souza Teixeira
- Laboratory of Cancer Molecular Genetics, School of Medical Sciences, University of Campinas, Campinas, Brazil
| | - Larissa Teodoro Rabi
- Laboratory of Cancer Molecular Genetics, School of Medical Sciences, University of Campinas, Campinas, Brazil
| | - Karina Colombera Peres
- Laboratory of Cancer Molecular Genetics, School of Medical Sciences, University of Campinas, Campinas, Brazil
| | - Matheus Nascimento
- Laboratory of Cancer Molecular Genetics, School of Medical Sciences, University of Campinas, Campinas, Brazil
| | | | - Valdemar Máximo
- Department of Medicine, Federal University of São Paulo, São Paulo, Brazil
- Institute for Research and Innovation in Health (i3S), University of Porto, Porto, Portugal
- Institute of Molecular Pathology and Immunology of the University of Porto (Ipatimup), Porto, Portugal
| | - Natássia Elena Bufalo
- Laboratory of Cancer Molecular Genetics, School of Medical Sciences, University of Campinas, Campinas, Brazil
- Department of Pathology, Faculty of Medicine of the University of Porto (FMUP), Porto, Portugal
| | - Laura Sterian Ward
- Laboratory of Cancer Molecular Genetics, School of Medical Sciences, University of Campinas, Campinas, Brazil
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Bui AT, Houari S, Loiodice S, Bazin D, Sadoine J, Roubier N, Vennat E, Tran TT, Berdal A, Ricort JM, Mhaouty-Kodja S, Babajko S. Use of Dental Defects Associated with Low-Dose di(2-Ethylhexyl)Phthalate as an Early Marker of Exposure to Environmental Toxicants. ENVIRONMENTAL HEALTH PERSPECTIVES 2022; 130:67003. [PMID: 35730944 PMCID: PMC9215264 DOI: 10.1289/ehp10208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 05/04/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Markers of exposure to environmental toxicants are urgently needed. Tooth enamel, with its unique properties, is able to record certain environmental conditions during its formation. Enamel formation and quality are dependent on hormonal regulation and environmental conditions, including exposure to endocrine disrupting chemicals (EDCs). Among EDCs, phthalates such as di-(2-ethylhexyl) phthalate (DEHP) raise concerns about their contribution to various pathologies, including those of mineralized tissues. OBJECTIVES The effects of exposure to low-doses of DEHP on the continually growing incisors were analyzed in mouse males and females. METHODS Adult male and female C57BL/6J mice were exposed daily to 0.5, 5, and 50μg/kg per day DEHP for 12 wk and their incisors clinically examined. Incisors of males were further analyzed by scanning electron microscopy (SEM), micro X-ray computed tomography (micro-computed tomography; μCT), and nanoindentation for the enamel, histology and real-time quantitative polymerase chain reaction (RT-qPCR) for the dental epithelium. RESULTS Clinical macroscopic observations of incisors showed various dose-dependent dental lesions such as opacities, scratches, and enamel breakdown in 30.5% of males (10 of 34 total incisors across three independent experiments), and 15.6% of females (7 of 46 incisors) at the highest dose, among which 18.1% (6 of 34 total incisors across three independent experiments) and 8.9% (4 of 46 incisors), respectively, had broken incisors. SEM showed an altered enamel surface and ultrastructure in DEHP-exposed male mice. Further characterization of the enamel defects in males by μCT showed a lower mineral density than controls, and nanoindentation showed a lower enamel hardness during all stages of enamel mineralization, with more pronounced alterations in the external part of the enamel. A delay in enamel mineralization was shown by several approaches (μCT, histology, and RT-qPCR). DISCUSSION We conclude that DEHP disrupted enamel development in mice by directly acting on dental cells with higher prevalence and severity in males than in females. The time window of DEHP effects on mouse tooth development led to typical alterations of structural, biochemical, and mechanical properties of enamel comparable to other EDCs, such as bisphenol A. The future characterization of dental defects in humans and animals due to environmental toxicants might be helpful in proposing them as early markers of exposure to such molecules. https://doi.org/10.1289/EHP10208.
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Affiliation(s)
- Ai Thu Bui
- Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut national de la santé et de la recherche médicale Unité mixte de recherche 1138 (Inserm UMRS 1138), Université Paris Cité, Sorbonne Université, Paris, France
| | - Sophia Houari
- Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut national de la santé et de la recherche médicale Unité mixte de recherche 1138 (Inserm UMRS 1138), Université Paris Cité, Sorbonne Université, Paris, France
- Department of Oral Biology, Dental Faculty, Université Paris Cité, Paris, France
| | - Sophia Loiodice
- Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut national de la santé et de la recherche médicale Unité mixte de recherche 1138 (Inserm UMRS 1138), Université Paris Cité, Sorbonne Université, Paris, France
- Department of Oral Biology, Dental Faculty, Université Paris Cité, Paris, France
| | - Dominique Bazin
- Laboratory of Chemistry and Physics, Université Paris-Saclay, Orsay, France
| | - Jérémy Sadoine
- EA 2496 Laboratory of Orofacial Pathologies, Imaging and Biotherapies, Dental School, Université Paris Cité, Montrouge, France
| | - Nicolas Roubier
- Laboratory of Mechanics of Soils, Structures and Materials, Le Centre national de la recherche scientifique (CNRS), Centrale-Supélec, Université Paris-Saclay, Châtenay-Malabry, France
| | - Elsa Vennat
- Institut Curie, Inserm U1196, Université Paris-Saclay, Orsay, France
| | - Thu Thuy Tran
- Faculty of Odonto-Stomatology, Ho Chi Minh University of Medicine and Pharmacy, Ho Chi Minh City, Vietnam
| | - Ariane Berdal
- Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut national de la santé et de la recherche médicale Unité mixte de recherche 1138 (Inserm UMRS 1138), Université Paris Cité, Sorbonne Université, Paris, France
- Department of Oral Biology, Dental Faculty, Université Paris Cité, Paris, France
| | - Jean-Marc Ricort
- Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut national de la santé et de la recherche médicale Unité mixte de recherche 1138 (Inserm UMRS 1138), Université Paris Cité, Sorbonne Université, Paris, France
| | - Sakina Mhaouty-Kodja
- Neuroscience Paris Seine–Institut de Biologie Paris-Seine, CNRS, Inserm, Sorbonne Université, Paris, France
| | - Sylvie Babajko
- Laboratory of Molecular Oral Pathophysiology, Centre de Recherche des Cordeliers, Institut national de la santé et de la recherche médicale Unité mixte de recherche 1138 (Inserm UMRS 1138), Université Paris Cité, Sorbonne Université, Paris, France
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Fletcher EJ, Santacruz-Márquez R, Mourikes VE, Neff AM, Laws MJ, Flaws JA. Effects of Phthalate Mixtures on Ovarian Folliculogenesis and Steroidogenesis. TOXICS 2022; 10:toxics10050251. [PMID: 35622664 PMCID: PMC9143992 DOI: 10.3390/toxics10050251] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 05/09/2022] [Accepted: 05/12/2022] [Indexed: 02/04/2023]
Abstract
The female reproductive system is dependent upon the health of the ovaries. The ovaries are responsible for regulating reproduction and endocrine function. Throughout a female’s reproductive lifespan, the ovaries undergo continual structural changes that are crucial for the maturation of ovarian follicles and the production of sex steroid hormones. Phthalates are known to target the ovaries at critical time points and to disrupt normal reproductive function. The US population is constantly exposed to measurable levels of phthalates. Phthalates can also pass placental barriers and affect the developing offspring. Phthalates are frequently prevalent as mixtures; however, most previous studies have focused on the effects of single phthalates on the ovary and female reproduction. Thus, the effects of exposure to phthalate mixtures on ovarian function and the female reproductive system remain unclear. Following a brief introduction to the ovary and its major roles, this review covers what is currently known about the effects of phthalate mixtures on the ovary, focusing primarily on their effects on folliculogenesis and steroidogenesis. Furthermore, this review focuses on the effects of phthalate mixtures on female reproductive outcomes. Finally, this review emphasizes the need for future research on the effects of environmentally relevant phthalate mixtures on the ovary and female reproduction.
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15
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Barrett ES, Corsetti M, Day D, Thurston SW, Loftus CT, Karr CJ, Kannan K, LeWinn KZ, Smith AK, Smith R, Tylavsky FA, Bush NR, Sathyanarayana S. Prenatal phthalate exposure in relation to placental corticotropin releasing hormone (pCRH) in the CANDLE cohort. ENVIRONMENT INTERNATIONAL 2022; 160:107078. [PMID: 35007898 PMCID: PMC8821329 DOI: 10.1016/j.envint.2022.107078] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/20/2021] [Accepted: 01/02/2022] [Indexed: 06/05/2023]
Abstract
CONTEXT Phthalates may disrupt maternal-fetal-placental endocrine pathways, affecting pregnancy outcomes and child development. Placental corticotropin releasing hormone (pCRH) is critical for healthy pregnancy and child development, but understudied as a target of endocrine disruption. OBJECTIVE To examine phthalate metabolite concentrations (as mixtures and individually) in relation to pCRH. DESIGN Secondary data analysis from a prospective cohort study. SETTING Prenatal clinics in Tennessee, USA. PATIENTS 1018 pregnant women (61.4% non-Hispanic Black, 32% non-Hispanic White, 6.6% other) participated in the CANDLE study and provided data. Inclusion criteria included: low-medical-risk singleton pregnancy, age 16-40, and gestational weeks 16-29. INTERVENTION None. MAIN OUTCOME MEASURES Plasma pCRH at two visits (mean gestational ages 23.0 and 31.8 weeks) and change in pCRH between visits (ΔpCRH). RESULTS In weighted quantile sums (WQS) regression models, phthalate mixtures were associated with higher pCRH at Visit 1 (β = 0.07, 95 %CI: 0.02, 0.11) but lower pCRH at Visit 2 (β = -0.08, 95 %CI: -0.14, -0.02). In stratified analyses, among women with gestational diabetes (n = 59), phthalate mixtures were associated with lower pCRH at Visit 1 (β = -0.17, 95 %CI: -0.35, 0.0006) and Visit 2 (β = -0.35, 95 %CI: -0.50, -0.19), as well as greater ΔpCRH (β = 0.16, 95 %CI: 0.07, 0.25). Among women with gestational hypertension (n = 102), phthalate mixtures were associated with higher pCRH at Visit 1 (β = 0.20, 95 %CI: 0.03, 0.36) and Visit 2 (β = 0.42; 95 %CI: 0.19, 0.64) and lower ΔpCRH (β = -0.17, 95 %CI: -0.29, -0.06). Significant interactions between individual phthalate metabolites and pregnancy complications were observed. CONCLUSIONS Phthalates may impact placental CRH secretion, with differing effects across pregnancy. Differences in results between women with and without gestational diabetes and gestational hypertension suggest a need for further research examining whether women with pregnancy complications may be more vulnerable to endocrine-disrupting effects of phthalates.
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Affiliation(s)
- Emily S Barrett
- Department of Biostatistics and Epidemiology, Rutgers School of Public Health, Piscataway, NJ 08854, USA; Environmental and Occupational Health Sciences Institute, Rutgers University, Piscataway, NJ 08854, USA.
| | - Matthew Corsetti
- Department of Biostatistics and Computational Biology, University of Rochester, School of Medicine and Dentistry, Rochester, NY 14642, USA
| | - Drew Day
- Seattle Children's Research Institute, University of Washington, Seattle, WA 98101, USA
| | - Sally W Thurston
- Department of Biostatistics and Computational Biology, University of Rochester, School of Medicine and Dentistry, Rochester, NY 14642, USA
| | - Christine T Loftus
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA 98195, USA
| | - Catherine J Karr
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA 98195, USA; Department of Epidemiology, University of Washington, Seattle, WA 98195, USA; Department of Pediatrics, University of Washington, Seattle, WA 98104, USA
| | - Kurunthachalam Kannan
- Department of Pediatrics and Department of Environmental Medicine, New York University School of Medicine, New York, NY 10016, USA
| | - Kaja Z LeWinn
- Department of Psychiatry and Behavioral Sciences, University of California San Francisco, San Francisco, CA 94143, USA
| | - Alicia K Smith
- Department of Gynecology and Obstetrics, Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Roger Smith
- Hunter Medical Research Institute, University of Newcastle, Newcastle 2300, Australia
| | - Frances A Tylavsky
- Department of Preventive Medicine, University of Tennessee Health Sciences Center, Memphis, TN 38163, USA
| | - Nicole R Bush
- Department of Psychiatry and Behavioral Sciences, University of California San Francisco, San Francisco, CA 94143, USA; Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | - Sheela Sathyanarayana
- Seattle Children's Research Institute, University of Washington, Seattle, WA 98101, USA; Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA 98195, USA; Department of Pediatrics, University of Washington, Seattle, WA 98104, USA
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16
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Gudda FO, Ateia M, Waigi MG, Wang J, Gao Y. Ecological and human health risks of manure-borne steroid estrogens: A 20-year global synthesis study. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 301:113708. [PMID: 34619591 DOI: 10.1016/j.jenvman.2021.113708] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 08/17/2021] [Accepted: 09/06/2021] [Indexed: 06/13/2023]
Abstract
Estrone (E1), 17α-estradiol (17α-E2), 17β-estradiol (17β-E2), and estriol (E3) are persistent in livestock manure and present serious pollution concerns because they can trigger endocrine disruption at part-per-trillion levels. This study conducted a global analysis of estrogen occurrence in manure using all literature data over the past 20 years. Besides, predicted environmental concentration (PEC) in soil and water was estimated using fate models, and risk/harm quotient (RQ/HQ) methods were applied to screen risks on children as well as on sensitive aquatic and soil species. The estradiol equivalent values ranged from 6.6 to 4.78 × 104 ng/g and 12.4 to 9.46 × 104 ng/L in the solid and liquid fraction. The estrogenic potency ranking in both fractions were 17β-E2> E1>17α-E2>E3. RQs of measured environmental concentration in the liquid fraction pose medium (E3) to high risk (E1, 17α-E2 & 17β-E2) to fish but are lower than risks posed by xenoestrogens. However, the RQ of PECs on both soil organisms and aquatic species were insignificant (RQ < 0.01), and HQs of contaminated water and soil ingestion were within acceptable limits. Nevertheless, meticulous toxicity studies are still required to confirm (or deny) the findings because endocrine disruption potency from mixtures of these classes of compounds cannot be ignored.
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Affiliation(s)
- Fredrick Owino Gudda
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Faculty of Environment and Resource Development, Department of Environmental Sciences, Egerton University, Box 536, Egerton, 20115, Kenya
| | - Mohamed Ateia
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, United States
| | - Michael Gatheru Waigi
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jian Wang
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Yanzheng Gao
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
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Patisaul HB. REPRODUCTIVE TOXICOLOGY: Endocrine disruption and reproductive disorders: impacts on sexually dimorphic neuroendocrine pathways. Reproduction 2021; 162:F111-F130. [PMID: 33929341 PMCID: PMC8484365 DOI: 10.1530/rep-20-0596] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 04/30/2021] [Indexed: 11/08/2022]
Abstract
We are all living with hundreds of anthropogenic chemicals in our bodies every day, a situation that threatens the reproductive health of present and future generations. This review focuses on endocrine-disrupting compounds (EDCs), both naturally occurring and man-made, and summarizes how they interfere with the neuroendocrine system to adversely impact pregnancy outcomes, semen quality, age at puberty, and other aspects of human reproductive health. While obvious malformations of the genitals and other reproductive organs are a clear sign of adverse reproductive health outcomes and injury to brain sexual differentiation, the hypothalamic-pituitary-gonadal (HPG) axis can be much more difficult to discern, particularly in humans. It is well-established that, over the course of development, gonadal hormones shape the vertebrate brain such that sex-specific reproductive physiology and behaviors emerge. Decades of work in neuroendocrinology have elucidated many of the discrete and often very short developmental windows across pre- and postnatal development in which this occurs. This has allowed toxicologists to probe how EDC exposures in these critical windows can permanently alter the structure and function of the HPG axis. This review includes a discussion of key EDC principles including how latency between exposure and the emergence of consequential health effects can be long, along with a summary of the most common and less well-understood EDC modes of action. Extensive examples of how EDCs are impacting human reproductive health, and evidence that they have the potential for multi-generational physiological and behavioral effects are also provided.
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Affiliation(s)
- Heather B Patisaul
- Department of Biological Sciences, Center for Human Health and the Environment, North Carolina State University, Raleigh, North Carolina, USA
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18
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Benbrook C, Perry MJ, Belpoggi F, Landrigan PJ, Perro M, Mandrioli D, Antoniou MN, Winchester P, Mesnage R. Commentary: Novel strategies and new tools to curtail the health effects of pesticides. Environ Health 2021; 20:87. [PMID: 34340709 PMCID: PMC8330079 DOI: 10.1186/s12940-021-00773-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 07/18/2021] [Indexed: 05/02/2023]
Abstract
BACKGROUND Flaws in the science supporting pesticide risk assessment and regulation stand in the way of progress in mitigating the human health impacts of pesticides. Critical problems include the scope of regulatory testing protocols, the near-total focus on pure active ingredients rather than formulated products, lack of publicly accessible information on co-formulants, excessive reliance on industry-supported studies coupled with reticence to incorporate published results in the risk assessment process, and failure to take advantage of new scientific opportunities and advances, e.g. biomonitoring and "omics" technologies. RECOMMENDED ACTIONS Problems in pesticide risk assessment are identified and linked to study design, data, and methodological shortcomings. Steps and strategies are presented that have potential to deepen scientific knowledge of pesticide toxicity, exposures, and risks. We propose four solutions: (1) End near-sole reliance in regulatory decision-making on industry-supported studies by supporting and relying more heavily on independent science, especially for core toxicology studies. The cost of conducting core toxicology studies at labs not affiliated with or funded directly by pesticide registrants should be covered via fees paid by manufacturers to public agencies. (2) Regulators should place more weight on mechanistic data and low-dose studies within the range of contemporary exposures. (3) Regulators, public health agencies, and funders should increase the share of exposure-assessment resources that produce direct measures of concentrations in bodily fluids and tissues. Human biomonitoring is vital in order to quickly identify rising exposures among vulnerable populations including applicators, pregnant women, and children. (4) Scientific tools across disciplines can accelerate progress in risk assessments if integrated more effectively. New genetic and metabolomic markers of adverse health impacts and heritable epigenetic impacts are emerging and should be included more routinely in risk assessment to effectively prevent disease. CONCLUSIONS Preventing adverse public health outcomes triggered or made worse by exposure to pesticides will require changes in policy and risk assessment procedures, more science free of industry influence, and innovative strategies that blend traditional methods with new tools and mechanistic insights.
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Affiliation(s)
- Charles Benbrook
- Heartland Health Research Alliance, 10526 SE Vashon Vista Drive, Port Orchard, WA 98367 USA
| | - Melissa J. Perry
- Department of Environmental and Occupational Health, George Washington University, Washington, DC USA
| | | | - Philip J. Landrigan
- Schiller Institute for Integrated Science and Society, Boston College, Newton, MA 02467 USA
| | | | | | - Michael N. Antoniou
- Gene Expression and Therapy Group, Department of Medical and Molecular Genetics, King’s College London, Faculty of Life Sciences and Medicine, Guy’s Hospital, London, UK
| | - Paul Winchester
- School of Medicine, Department of Pediatrics, Indiana University, Indianapolis, IN USA
| | - Robin Mesnage
- Gene Expression and Therapy Group, Department of Medical and Molecular Genetics, King’s College London, Faculty of Life Sciences and Medicine, Guy’s Hospital, London, UK
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19
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Santoni G, Amantini C, Santoni M, Maggi F, Morelli MB, Santoni A. Mechanosensation and Mechanotransduction in Natural Killer Cells. Front Immunol 2021; 12:688918. [PMID: 34335592 PMCID: PMC8320435 DOI: 10.3389/fimmu.2021.688918] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/28/2021] [Indexed: 11/13/2022] Open
Abstract
Natural killer (NK) cells are a main subset of innate lymphocytes that contribute to host immune protection against viruses and tumors by mediating target cell killing and secreting a wide array of cytokines. Their functions are finely regulated by a balance between activating and inhibitory receptors and involve also adhesive interactions. Mechanotransduction is the process in which physical forces sensed by mechanosensors are translated into chemical signaling. Herein, we report findings on the involvement of this mechanism that is mainly mediated by actin cytoskeleton, in the regulation of NK cell adhesion, migration, tissue infiltration and functions. Actin represents the structural basis for NK cell immunological synapse (NKIS) and polarization of secretory apparatus. NK-target cell interaction involves the formation of both uropods and membrane nanotubes that allow target cell interaction over long distances. Actin retrograde flow (ARF) regulates NK cell signaling and controls the equilibrium between activation versus inhibition. Activating NKIS is associated with rapid lamellipodial ARF, whereas lower centripetal actin flow is present during inhibitory NKIS where β actin can associate with the tyrosine phosphatase SHP-1. Overall, a better knowledge of mechanotransduction might represent a future challenge: Realization of nanomaterials tailored for NK cells, would be important to translate in vitro studies in in vivo new immunotherapeutic approaches.
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Affiliation(s)
- Giorgio Santoni
- School of Pharmacy, Section of Experimental Medicine, University of Camerino, Camerino, Italy
| | - Consuelo Amantini
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino, Italy
| | | | - Federica Maggi
- School of Pharmacy, Section of Experimental Medicine, University of Camerino, Camerino, Italy.,Department of Molecular Medicine, Sapienza University, Rome, Italy
| | - Maria Beatrice Morelli
- School of Pharmacy, Section of Experimental Medicine, University of Camerino, Camerino, Italy
| | - Angela Santoni
- Department of Molecular Medicine, Sapienza University, Rome, Italy.,IRCCS Neuromed, Pozzilli, Italy
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20
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Zeitler EF, Cecala KK, McGrath DA. Carryover effects minimized the positive effects of treated wastewater on anuran development. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 289:112571. [PMID: 33866133 DOI: 10.1016/j.jenvman.2021.112571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 03/26/2021] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
Constructed wetlands (CWs) are a potential solution for wastewater treatment due to their capacity to support native species and provide tertiary wastewater treatment. However, CWs can expose wildlife communities to excess nutrients and harmful contaminants, affecting their development, morphology, and behavior. To examine how wastewater CWs may affect wildlife, we raised Southern leopard frogs, Lithobates sphenocephalus, in wastewater from conventional secondary lagoon and tertiary CW treatments for comparison with pondwater along with the presence and absence of a common plant invader to these systems - common duckweed (Lemna minor) - and monitored their juvenile development for potential carryover effects into the terrestrial environment. The tertiary CW treatment did not change demographic or morphological outcomes relative to conventional wastewater treatment in our study. Individuals emerging from both wastewater treatments demonstrated lower terrestrial survival rates than those emerging from pondwater throughout the experiment though experiment-wide survival rates were equivalent among treatments. Individuals from wastewater treatments transformed at larger sizes relative to those in pondwater, but this advantage was minimized in the terrestrial environment. Individuals that developed with duckweed had consistent but marginally better performance in both environments. Our results suggest a potential trade-off between short-term benefits of development in treated effluent and long-term consequences on overall fitness. Overall, we demonstrate that CWs for the purpose of wastewater treatment may not be suitable replicates for wildlife habitat and could have consequences for local population dynamics.
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Affiliation(s)
- Emma F Zeitler
- Department of Biology, University of the South, Sewanee, TN, 37383, USA
| | - Kristen K Cecala
- Department of Biology, University of the South, Sewanee, TN, 37383, USA.
| | - Deborah A McGrath
- Department of Biology, University of the South, Sewanee, TN, 37383, USA
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21
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Gallego-Ríos SE, Atencio-García VJ, Peñuela GA. Effect of ibuprofen in vivo and in vitro on the sperm quality of the striped catfish Pseudoplatystoma magdaleniatum. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:36133-36141. [PMID: 33683592 DOI: 10.1007/s11356-021-13245-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Because ibuprofen is a high consumption drug, which has the waters as its final destination, causing alterations in the aquatic environment, specifically in fish. However, there is not enough knowledge about the effect it can have on neotropical fish. This study aimed to evaluate the impact of different concentrations of ibuprofen on sperm quality, both in vivo and in vitro, of the striped catfish Pseudoplatystoma magdaleniatum, and analyze its effects on the reproduction of this critical extinction endangered species. For this purpose, three groups of fish, with a mean weight of 2.3 ± 0.6 kg and mean total length of 62.9 ± 6.1 cm, were placed in tanks (3 fish/tank) with water at concentrations of 0 (control), 25, and 50 μg/L of ibuprofen for 4 months. For the analysis of sperm quality for each treatment (in vivo), the males were selected in the spermiation phase. Also, the semen from the control group was used for in vitro tests and activated with type I water solutions containing 0, 25, and 50 μg/L of ibuprofen. In the in vivo and in vitro tests, when fish and semen were treated to 50 μg/l, the seminal quality of striped catfish was statistically different from the other treatments. For this study, it was shown that ibuprofen at concentrations of 50 μg/L can cause a significant reduction in sperm quality and, therefore, a threat to the reproduction of P. magdaleniatum.
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Affiliation(s)
- Sara E Gallego-Ríos
- Pollution Diagnostics and Control Group (GDCON), School of the Environment, Faculty of Engineering, University Research Campus (SIU), University of Antioquia (UdeA), Calle 70 No. 52-21, Medellin, Colombia.
| | - Víctor Julio Atencio-García
- Fishculture Research Institute (CINPIC)/FMVZ/DCA, University of Córdoba, Carrera 6 No. 77-305, Montería, Colombia
| | - Gustavo Antonio Peñuela
- Pollution Diagnostics and Control Group (GDCON), School of the Environment, Faculty of Engineering, University Research Campus (SIU), University of Antioquia (UdeA), Calle 70 No. 52-21, Medellin, Colombia
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22
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Hsu PC, Li ZK, Lai CS, Tseng LH, Lee CW, Cheng FJ, Chang CY, Chen JR. Transgenerational effects of BDE-209 on male reproduction in F3 offspring rats. CHEMOSPHERE 2021; 272:129829. [PMID: 35534961 DOI: 10.1016/j.chemosphere.2021.129829] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 01/23/2021] [Accepted: 01/28/2021] [Indexed: 06/14/2023]
Abstract
Decabromodiphenyl ether (BDE-209), a congener of polybrominated diphenyl ethers, is a commonly used brominated flame retardant and a known endocrine disrupting chemical (EDC). Knowledge about the effects of prenatal BDE-209 exposure on male reproduction and whether transgenerational effects occur in subsequent generations are scant. Therefore, in this study, we tested the hypothesis that prenatal exposure to BDE-209 disrupted sperm function in the F1, F2, and F3 generations of male rats. Pregnant Sprague-Dawley rats were treated by gavage from gestation day 0 to birth with 5 mg BDE-209/kg/day. This treatment was based on the lowest-observed-adverse-effect level for DNA damage to sperm in male offspring. On postnatal day 84 for all generations, epididymal sperm counts, motility, morphology, reactive oxygen species generation, sperm chromatin DNA structure integrity, testicular DNA content in spermatogenesis, and serum testosterone levels were assessed. DNA methyltransferase (Dnmts) mRNA expression and methyl-CpG binding domain sequencing were also examined to analyze DNA methylation status in the F3 generation. In the F1 generation, prenatal exposure to BDE-209 disrupted body weight, decreased anogenital distance (AGD), sperm count, and motility; and increased bent tail rates of sperm. In the F2 generation, exposure to BDE-209 decreased AGD, sperm count, normal morphology rates, Dnmt1 expression, and increased Dnmt3a expression. In the F3 generation, BDE-209 exposure decreased AGD and normal sperm morphology, disrupted testicular elongated spermatid and round spermatid rates, reduced serum testosterone levels, and inhibited the mRNA expression of Dnmt1 and Dnmt3b. Compared with the control group, there existed 215 differentially hyper-methylated and 83 hypo-methylated genes in the BDE-209 group. BDE-209 is an EDC to disrupt the male reproduction from F1 to F3. BDE-209-induced changes in sperm function and hyper- or hypo-DNA methylation in the F3 generation might therefore explain the possible mechanism underlying BDE-209-mediated epigenetic transgenerational effects on the male reproductive system.
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Affiliation(s)
- Ping-Chi Hsu
- Department of Safety, Health and Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81164, Taiwan.
| | - Zheng-Kuan Li
- Department of Safety, Health and Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81164, Taiwan
| | - Ching-Shu Lai
- Department of Seafood Science, National Kaohsiung University of Science and Technology, Kaohsiung, 81157, Taiwan
| | - Li-Ho Tseng
- Department of Environmental Science and Occupational Safety and Hygiene, Tajen University, Pingtung, 90741, Taiwan
| | - Chia-Wei Lee
- Department of Safety, Health and Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81164, Taiwan
| | - Fu-Jen Cheng
- Department of Emergency Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, 83301, Taiwan
| | - Chao-Yu Chang
- Department of Emergency Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, 81362, Taiwan
| | - Jenq-Renn Chen
- Department of Safety, Health and Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, 81164, Taiwan
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23
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Abstract
Human and animal welfare primarily depends on the availability of food and surrounding environment. Over a century and half, the quest to identify agents that can enhance food production and protection from vector borne diseases resulted in the identification and use of a variety of pesticides, of which the pyrethroid based ones emerged as the best choice. Pesticides while improved the quality of life, on the other hand caused enormous health risks. Because of their percolation into drinking water and food chain and usage in domestic settings, humans unintentionally get exposed to the pesticides on a daily basis. The health hazards of almost all known pesticides at a variety of doses and exposure times are reported. This review provides a comprehensive summation on the historical, epidemiological, chemical and biological (physiological, biochemical and molecular) aspects of pyrethroid based insecticides. An overview of the available knowledge suggests that the synthetic pyrethroids vary in their chemical and toxic nature and pose health hazards that range from simple nausea to cancers. Despite large number of reports, studies that focused on identifying the health hazards using doses that are equivalent or relevant to human exposure are lacking. It is high time such studies are conducted to provide concrete evidence on the hazards of consuming pesticide contaminated food. Policy decisions to decrease the residual levels of pesticides in agricultural products and also to encourage organic farming is suggested.
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Affiliation(s)
| | - Suresh Yenugu
- Department of Animal Biology, University of Hyderabad, Hyderabad, India
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24
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Tarapore P, Ouyang B. Perfluoroalkyl Chemicals and Male Reproductive Health: Do PFOA and PFOS Increase Risk for Male Infertility? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18073794. [PMID: 33916482 PMCID: PMC8038605 DOI: 10.3390/ijerph18073794] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/18/2021] [Accepted: 03/23/2021] [Indexed: 01/09/2023]
Abstract
Poly- and perfluoroalkyl substances (PFAS) are manmade synthetic chemicals which have been in existence for over 70 years. Though they are currently being phased out, their persistence in the environment is widespread. There is increasing evidence linking PFAS exposure to health effects, an issue of concern since PFAS such as perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) bioaccumulate in humans, with a half-life of years. Many epidemiological studies suggest that, worldwide, semen quality has decreased over the past several decades. One of the most worrying effects of PFOS and PFOA is their associations with lower testosterone levels, similar to clinical observations in infertile men. This review thus focuses on PFOS/PFOA-associated effects on male reproductive health. The sources of PFAS in drinking water are listed. The current epidemiological studies linking increased exposure to PFAS with lowered testosterone and semen quality, and evidence from rodent studies supporting their function as endocrine disruptors on the reproductive system, exhibiting non-monotonic dose responses, are noted. Finally, their mechanisms of action and possible toxic effects on the Leydig, Sertoli, and germ cells are discussed. Future research efforts must consider utilizing better human model systems for exposure, using more accurate PFAS exposure susceptibility windows, and improvements in statistical modeling of data to account for the endocrine disruptor properties of PFAS.
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Affiliation(s)
- Pheruza Tarapore
- Department of Environmental and Public Health Sciences, University of Cincinnati Medical Center, Cincinnati, OH 45267, USA;
- Center of Environmental Genetics, University of Cincinnati Medical Center, Cincinnati, OH 45267, USA
- Cincinnati Cancer Center, University of Cincinnati, Cincinnati, OH 45267, USA
- Correspondence: or ; Tel.: +1-513-558-5148
| | - Bin Ouyang
- Department of Environmental and Public Health Sciences, University of Cincinnati Medical Center, Cincinnati, OH 45267, USA;
- Center of Environmental Genetics, University of Cincinnati Medical Center, Cincinnati, OH 45267, USA
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25
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Soto AM, Schaeberle CM, Sonnenschein C. From Wingspread to CLARITY: a personal trajectory. Nat Rev Endocrinol 2021; 17:247-256. [PMID: 33514909 PMCID: PMC9662687 DOI: 10.1038/s41574-020-00460-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/09/2020] [Indexed: 01/30/2023]
Abstract
In the three decades since endocrine disruption was conceptualized at the Wingspread Conference, we have witnessed the growth of this multidisciplinary field and the accumulation of evidence showing the deleterious health effects of endocrine-disrupting chemicals. It is only within the past decade that, albeit slowly, some changes regarding regulatory measures have taken place. In this Perspective, we address some historical points regarding the advent of the endocrine disruption field and the conceptual changes that endocrine disruption brought about. We also provide our personal recollection of the events triggered by our serendipitous discovery of oestrogenic activity in plastic, a founder event in the field of endocrine disruption. This recollection ends with the CLARITY study as an example of a discordance between 'science for its own sake' and 'regulatory science' and leads us to offer a perspective that could be summarized by the motto attributed to Ludwig Boltzmann: "Nothing is more practical than a good theory".
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Affiliation(s)
- Ana M Soto
- Department of Immunology, Tufts University, School of Medicine, Boston, MA, USA.
| | - Cheryl M Schaeberle
- Department of Immunology, Tufts University, School of Medicine, Boston, MA, USA
| | - Carlos Sonnenschein
- Department of Immunology, Tufts University, School of Medicine, Boston, MA, USA
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26
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vom Saal FS, Vandenberg LN. Update on the Health Effects of Bisphenol A: Overwhelming Evidence of Harm. Endocrinology 2021; 162:6124507. [PMID: 33516155 PMCID: PMC7846099 DOI: 10.1210/endocr/bqaa171] [Citation(s) in RCA: 78] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Indexed: 12/14/2022]
Abstract
In 1997, the first in vivo bisphenol A (BPA) study by endocrinologists reported that feeding BPA to pregnant mice induced adverse reproductive effects in male offspring at the low dose of 2 µg/kg/day. Since then, thousands of studies have reported adverse effects in animals administered low doses of BPA. Despite more than 100 epidemiological studies suggesting associations between BPA and disease/dysfunction also reported in animal studies, regulatory agencies continue to assert that BPA exposures are safe. To address this disagreement, the CLARITY-BPA study was designed to evaluate traditional endpoints of toxicity and modern hypothesis-driven, disease-relevant outcomes in the same set of animals. A wide range of adverse effects was reported in both the toxicity and the mechanistic endpoints at the lowest dose tested (2.5 µg/kg/day), leading independent experts to call for the lowest observed adverse effect level (LOAEL) to be dropped 20 000-fold from the current outdated LOAEL of 50 000 µg/kg/day. Despite criticism by members of the Endocrine Society that the Food and Drug Administration (FDA)'s assumptions violate basic principles of endocrinology, the FDA rejected all low-dose data as not biologically plausible. Their decisions rely on 4 incorrect assumptions: dose responses must be monotonic, there exists a threshold below which there are no effects, both sexes must respond similarly, and only toxicological guideline studies are valid. This review details more than 20 years of BPA studies and addresses the divide that exists between regulatory approaches and endocrine science. Ultimately, CLARITY-BPA has shed light on why traditional methods of evaluating toxicity are insufficient to evaluate endocrine disrupting chemicals.
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Affiliation(s)
- Frederick S vom Saal
- University of Missouri – Columbia, Division of Biological Sciences, Columbia, Missouri
- Correspondence: Dr. Frederick vom Saal, University of Missouri-Columbia, Division of Biological Sciences, 105 Lefevre Hall, Columbia, MO, 65211, USA. E-mail:
| | - Laura N Vandenberg
- University of Massachusetts – Amherst, Department of Environmental Health Sciences, Amherst, Massachusetts
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27
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Lopez-Rodriguez D, Franssen D, Bakker J, Lomniczi A, Parent AS. Cellular and molecular features of EDC exposure: consequences for the GnRH network. Nat Rev Endocrinol 2021; 17:83-96. [PMID: 33288917 DOI: 10.1038/s41574-020-00436-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/16/2020] [Indexed: 12/12/2022]
Abstract
The onset of puberty and the female ovulatory cycle are important developmental milestones of the reproductive system. These processes are controlled by a tightly organized network of neurotransmitters and neuropeptides, as well as genetic, epigenetic and hormonal factors, which ultimately drive the pulsatile secretion of gonadotropin-releasing hormone. They also strongly depend on organizational processes that take place during fetal and early postnatal life. Therefore, exposure to environmental pollutants such as endocrine-disrupting chemicals (EDCs) during critical periods of development can result in altered brain development, delayed or advanced puberty and long-term reproductive consequences, such as impaired fertility. The gonads and peripheral organs are targets of EDCs, and research from the past few years suggests that the organization of the neuroendocrine control of reproduction is also sensitive to environmental cues and disruption. Among other mechanisms, EDCs interfere with the action of steroidal and non-steroidal receptors, and alter enzymatic, metabolic and epigenetic pathways during development. In this Review, we discuss the cellular and molecular consequences of perinatal exposure (mostly in rodents) to representative EDCs with a focus on the neuroendocrine control of reproduction, pubertal timing and the female ovulatory cycle.
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Affiliation(s)
| | - Delphine Franssen
- Neuroendocrinology Unit, GIGA Neurosciences, University of Liège, Liège, Belgium
| | - Julie Bakker
- Neuroendocrinology Unit, GIGA Neurosciences, University of Liège, Liège, Belgium
| | - Alejandro Lomniczi
- Division of Neuroscience, Oregon National Primate Research Center (ONPRC), OHSU, OR, USA
| | - Anne-Simone Parent
- Neuroendocrinology Unit, GIGA Neurosciences, University of Liège, Liège, Belgium.
- Department of Pediatrics, University Hospital Liège, Liège, Belgium.
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28
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Vandenberg LN, Bugos J. Assessing the Public Health Implications of the Food Preservative Propylparaben: Has This Chemical Been Safely Used for Decades. Curr Environ Health Rep 2021; 8:54-70. [PMID: 33415721 DOI: 10.1007/s40572-020-00300-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2020] [Indexed: 12/14/2022]
Abstract
PURPOSE Parabens are chemicals containing alkyl-esters of p-hydroxybenzoic acid, which give them antimicrobial, antifungal, and preservative properties. Propylparaben (PP) is one paraben that has been widely used in personal care products, cosmetics, pharmaceuticals, and food. In this review, we address the ongoing controversy over the safety of parabens, and PP specifically. These chemicals have received significant public attention after studies published almost 20 years ago suggested plausible associations between PP exposures and breast cancer. RECENT FINDINGS Here, we use key characteristics, a systematic approach to evaluate the endocrine disrupting properties of PP based on features of "known" endocrine disruptors, and consider whether its classification as a "weak" estrogen should alleviate public health concerns over human exposures. We also review the available evidence from rodent and human studies to illustrate how the large data gaps that exist in hazard assessments raise concerns about current evaluations by regulatory agencies that PP use is safe. Finally, we address the circular logic that is used to suggest that because PP has been used for several decades, it must be safe. We conclude that inadequate evidence has been provided for the safe use of PP in food, cosmetics, and consumer products.
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Affiliation(s)
- Laura N Vandenberg
- Department of Environmental Health Sciences, School of Public Health and Health Sciences, University of Massachusetts, 171C Goessmann, 686 N. Pleasant Street, Amherst, MA, 01003, USA.
| | - Jennifer Bugos
- Department of Environmental Health Sciences, School of Public Health and Health Sciences, University of Massachusetts, 171C Goessmann, 686 N. Pleasant Street, Amherst, MA, 01003, USA
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29
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Vandenberg LN, Najmi A, Mogus JP. Agrochemicals with estrogenic endocrine disrupting properties: Lessons Learned? Mol Cell Endocrinol 2020; 518:110860. [PMID: 32407980 PMCID: PMC9448509 DOI: 10.1016/j.mce.2020.110860] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 04/16/2020] [Accepted: 05/04/2020] [Indexed: 02/07/2023]
Abstract
Many agrochemicals have endocrine disrupting properties. A subset of these chemicals is characterized as "estrogenic". In this review, we describe several distinct ways that chemicals used in crop production can affect estrogen signaling. Using three agrochemicals as examples (DDT, endosulfan, and atrazine), we illustrate how screening tests such as the US EPA's EDSP Tier 1 assays can be used as a first-pass approach to evaluate agrochemicals for endocrine activity. We then apply the "Key Characteristics" approach to illustrate how chemicals like DDT can be evaluated, together with the World Health Organization's definition of an endocrine disruptor, to identify data gaps. We conclude by describing important issues that must be addressed in the evaluation and regulation of hormonally active agrochemicals including mixture effects, efforts to reduce vertebrate animal use, chemical prioritization, and improvements in hazard, exposure, and risk assessments.
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Affiliation(s)
- Laura N Vandenberg
- Department of Environmental Health Sciences, School of Public Health and Health Sciences, University of Massachusetts, Amherst, USA.
| | - Aimal Najmi
- Department of Environmental Health Sciences, School of Public Health and Health Sciences, University of Massachusetts, Amherst, USA
| | - Joshua P Mogus
- Department of Environmental Health Sciences, School of Public Health and Health Sciences, University of Massachusetts, Amherst, USA
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Ren XM, Kuo Y, Blumberg B. Agrochemicals and obesity. Mol Cell Endocrinol 2020; 515:110926. [PMID: 32619583 PMCID: PMC7484009 DOI: 10.1016/j.mce.2020.110926] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 06/11/2020] [Accepted: 06/23/2020] [Indexed: 12/11/2022]
Abstract
Obesity has become a very large concern worldwide, reaching pandemic proportions over the past several decades. Lifestyle factors, such as excess caloric intake and decreased physical activity, together with genetic predispositions, are well-known factors related to obesity. There is accumulating evidence suggesting that exposure to some environmental chemicals during critical windows of development may contribute to the rapid increase in the incidence of obesity. Agrochemicals are a class of chemicals extensively used in agriculture, which have been widely detected in human. There is now considerable evidence linking human exposure to agrochemicals with obesity. This review summarizes human epidemiological evidence and experimental animal studies supporting the association between agrochemical exposure and obesity and outlines possible mechanistic underpinnings for this link.
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Affiliation(s)
- Xiao-Min Ren
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; Department of Developmental and Cell Biology, University of California, Irvine, CA, 92697-2300, USA
| | - Yun Kuo
- Department of Developmental and Cell Biology, University of California, Irvine, CA, 92697-2300, USA
| | - Bruce Blumberg
- Department of Developmental and Cell Biology, University of California, Irvine, CA, 92697-2300, USA; Department of Pharmaceutical Sciences, University of California, Irvine, CA, USA; Department of Biomedical Engineering, University of California, Irvine, CA, USA.
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Buha A, Đukić-Ćosić D, Ćurčić M, Bulat Z, Antonijević B, Moulis JM, Goumenou M, Wallace D. Emerging Links between Cadmium Exposure and Insulin Resistance: Human, Animal, and Cell Study Data. TOXICS 2020; 8:E63. [PMID: 32867022 PMCID: PMC7560347 DOI: 10.3390/toxics8030063] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 12/13/2022]
Abstract
Recent research has helped clarify the role of cadmium (Cd) in various pathological states. We have demonstrated Cd involvement in pancreatic cancer, as well as the bioaccumulation of Cd in the pancreas. Bioaccumulation and increased toxicity suggest that Cd may also be involved in other pancreas-mediated diseases, like diabetes. Cd falls into the category of "hyperglycemic" metals, i.e., metals that increase blood glucose levels, which could be due to increased gluconeogenesis, damage to β-cells leading to reduced insulin production, or insulin resistance at target tissue resulting in a lack of glucose uptake. This review addresses the current evidence for the role of Cd, leading to insulin resistance from human, animal, and in vitro studies. Available data have shown that Cd may affect normal insulin function through multiple pathways. There is evidence that Cd exposure results in the perturbation of the enzymes and modulatory proteins involved in insulin signal transduction at the target tissue and mutations of the insulin receptor. Cd, through well-described mechanisms of oxidative stress, inflammation, and mitochondrial damage, may also alter insulin production in β-cells. More work is necessary to elucidate the mechanisms associated with Cd-mediated insulin resistance.
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Affiliation(s)
- Aleksandra Buha
- Department of Toxicology “Akademik Danilo Soldatović”, University of Belgrade-Faculty of Pharmacy, 11000 Belgrade, Serbia; (D.Đ.-Ć.); (M.Ć.); (Z.B.); (B.A.)
| | - Danijela Đukić-Ćosić
- Department of Toxicology “Akademik Danilo Soldatović”, University of Belgrade-Faculty of Pharmacy, 11000 Belgrade, Serbia; (D.Đ.-Ć.); (M.Ć.); (Z.B.); (B.A.)
| | - Marijana Ćurčić
- Department of Toxicology “Akademik Danilo Soldatović”, University of Belgrade-Faculty of Pharmacy, 11000 Belgrade, Serbia; (D.Đ.-Ć.); (M.Ć.); (Z.B.); (B.A.)
| | - Zorica Bulat
- Department of Toxicology “Akademik Danilo Soldatović”, University of Belgrade-Faculty of Pharmacy, 11000 Belgrade, Serbia; (D.Đ.-Ć.); (M.Ć.); (Z.B.); (B.A.)
| | - Biljana Antonijević
- Department of Toxicology “Akademik Danilo Soldatović”, University of Belgrade-Faculty of Pharmacy, 11000 Belgrade, Serbia; (D.Đ.-Ć.); (M.Ć.); (Z.B.); (B.A.)
| | - Jean-Marc Moulis
- Alternative Energies and Atomic Energy Commission—Fundamental Research Division—Interdisciplinary Research Institute of Grenoble (CEA-IRIG), University of Grenoble Alpes, F-38000 Grenoble, France;
- Laboratory of Fundamental and Applied Bioenergetics (LBFA), University of Grenoble Alpes, Inserm U1055, F-38000 Grenoble, France
| | - Marina Goumenou
- Centre of Toxicology and Forensic Sciences, Medicine School, University of Crete, 70013 Heraklion, Greece;
- General Chemical State Laboratory of Greek Republic, 71202 Heraklion, Greece
| | - David Wallace
- Department of Pharmacology & Toxicology, Oklahoma State University Center for Health Sciences, Tulsa, OK 74107, USA;
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Babajko S, Gayrard V, Houari S, Thu Bui A, Barouki R, Niederreither K, Fini JB, Dursun E, Coumoul X. [Oral cavity as a target and a marker of environmental exposures: developmental dental defects]. Med Sci (Paris) 2020; 36:225-230. [PMID: 32228840 DOI: 10.1051/medsci/2020024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The oral cavity is one of the main route for environmental contaminations associated to many chronic diseases (cancers, fertility and behavior disorders for example) via alimentation, medications and respiration. These environmental factors including, among others, endocrine disruptors and excessive fluoride can disrupt dental development and thus generate irreversible enamel defects. These defects are then treated with materials that may release molecules capable of generating these defects, leading to a vicious circle, particularly in pregnant women and young children. The present paper aims to review the state of knowledge, questions and controversies on common environmental factors in contact with the oral cavity. It also reviews their mechanisms of action and the mediators involved in enamel pathologies associated with environmental conditions. Dental tissues can not only be targeted by environmental factors but can also serve as early and easily accessible markers of exposure to these agents. Understanding and characterizing the environmental impact in the oral cavity will help to prevent multiple diseases, oral and distant, whose link with oral homeostasis is just being explored.
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Affiliation(s)
- Sylvie Babajko
- Centre de Recherche des Cordeliers, Inserm UMRS 1138, Université de Paris, Sorbonne Université, 15 rue de l'École de Médecine, 75006, Paris, France
| | | | - Sophia Houari
- Centre de Recherche des Cordeliers, Inserm UMRS 1138, Université de Paris, Sorbonne Université, 15 rue de l'École de Médecine, 75006, Paris, France
| | - Ai Thu Bui
- Centre de Recherche des Cordeliers, Inserm UMRS 1138, Université de Paris, Sorbonne Université, 15 rue de l'École de Médecine, 75006, Paris, France
| | - Robert Barouki
- Inserm UMRS 1124, Université de Paris, 75006 Paris, France
| | | | - Jean-Baptiste Fini
- Muséum National d'Histoire Naturelle, CNRS UMR 7221, 75006 Paris, France
| | - Elisabeth Dursun
- Unité de Recherche en Biomatériaux Innovants et Interfaces EA4462, Université Paris Descartes, Montrouge ; Hôpital Henri Mondor, AP-HP, 94010 Créteil, France
| | - Xavier Coumoul
- Inserm UMRS 1124, Université de Paris, 75006 Paris, France
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Zhang J, Liu H, Li J, Lou L, Zhang S, Feng D, Feng X. Exposure to deltamethrin in adolescent mice induced thyroid dysfunction and behavioral disorders. CHEMOSPHERE 2020; 241:125118. [PMID: 31683416 DOI: 10.1016/j.chemosphere.2019.125118] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 10/10/2019] [Accepted: 10/12/2019] [Indexed: 06/10/2023]
Abstract
Deltamethrin (DM) has become one of the most widely used insecticides in the world due to its low toxicity, high efficiency and low persistence in soil. However, it is still unknown whether DM exposure has any effects on the Hypothalamic-Pituitary-Thyroid (HPT) axis in adolescent mice. In this study, the open field test and circadian activity test showed that DM exposure increased activity. There was no significant difference between the groups in the light/dark box test and nest building test. Forced swimming test showed that after 6 and 12 mg kg-1 DM exposure 28 days, the immobility time was increased and the swimming time was reduced. After 6 mg kg-1 DM treatment, the thyroid stimulating hormone (TSH) content increased, and thyrotropin releasing hormone (TRH), triiodothyronine (T3) and thyroxine (T4) decreased. After exposure to 6 and 12 mg kg-1 DM, mRNA levels of HPT axis-related genes were destroyed. The histological examination showed that, the DM groups mice thyroid tissues appeared expanded thyroid follicles, scanty colloid and hyperplastic thyroid cells. Western blot results showed that the expression level of tyrosine hydroxylase (TH) protein decreased and the content of dopamine transporter (DAT) protein increased in DM treated mice striatum. Collectively, our results indicated that DM exposure could induce thyroid dysfunction and behavioral disorders in adolescent mice.
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Affiliation(s)
- Jingwen Zhang
- The Key Laboratory of Bioactive Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, College of Life Science, Nankai University, Tianjin, 300071, China; Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin, 300350, China
| | - Haoyue Liu
- The Key Laboratory of Bioactive Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, College of Life Science, Nankai University, Tianjin, 300071, China
| | - Jiangning Li
- The Key Laboratory of Bioactive Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, College of Life Science, Nankai University, Tianjin, 300071, China
| | - Lixiang Lou
- The Key Laboratory of Bioactive Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, College of Life Science, Nankai University, Tianjin, 300071, China
| | - Shaozhi Zhang
- The Key Laboratory of Bioactive Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, College of Life Science, Nankai University, Tianjin, 300071, China
| | - Daofu Feng
- Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, 300052, China.
| | - Xizeng Feng
- The Key Laboratory of Bioactive Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, College of Life Science, Nankai University, Tianjin, 300071, China; Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin, 300350, China.
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MacFarlane EM, Bruin JE. Human Pluripotent Stem Cells: A Unique Tool for Toxicity Testing in Pancreatic Progenitor and Endocrine Cells. Front Endocrinol (Lausanne) 2020; 11:604998. [PMID: 33542706 PMCID: PMC7851047 DOI: 10.3389/fendo.2020.604998] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 11/27/2020] [Indexed: 12/18/2022] Open
Abstract
Diabetes prevalence is increasing worldwide, and epidemiological studies report an association between diabetes incidence and environmental pollutant exposure. There are >84,000 chemicals in commerce, many of which are released into the environment without a clear understanding of potential adverse health consequences. While in vivo rodent studies remain an important tool for testing chemical toxicity systemically, we urgently need high-throughput screening platforms in biologically relevant models to efficiently prioritize chemicals for in depth toxicity analysis. Given the increasing global burden of obesity and diabetes, identifying chemicals that disrupt metabolism should be a high priority. Pancreatic endocrine cells are key regulators of systemic metabolism, yet often overlooked as a target tissue in toxicology studies. Immortalized β-cell lines and primary human, porcine, and rodent islets are widely used for studying the endocrine pancreas in vitro, but each have important limitations in terms of scalability, lifespan, and/or biological relevance. Human pluripotent stem cell (hPSC) culture is a powerful tool for in vitro toxicity testing that addresses many of the limitations with other β-cell models. Current in vitro differentiation protocols can efficiently generate glucose-responsive insulin-secreting β-like cells that are not fully mature, but still valuable for high-throughput toxicity screening in vitro. Furthermore, hPSCs can be applied as a model of developing pancreatic endocrine cells to screen for chemicals that influence endocrine cell formation during critical windows of differentiation. Given their versatility, we recommend using hPSCs to identify potential β-cell toxins, which can then be prioritized as chemicals of concern for metabolic disruption.
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Gestational and perinatal exposure to diazinon causes long-lasting neurobehavioral consequences in the rat. Toxicology 2019; 429:152327. [PMID: 31704166 DOI: 10.1016/j.tox.2019.152327] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 09/16/2019] [Accepted: 10/30/2019] [Indexed: 02/08/2023]
Abstract
Diazinon is a widely-used organophosphate pesticide. Pulsatile exposure to diazinon during neonatal development has previously been shown cause long-term neurobehavioral impairments in rats. However, the effects of chronic low concentration exposures during perinatal development remain unclear. This experiment evaluated such effects in Sprague-Dawley rats by implanting osmotic pumps in breeder females prior to conception (N = 13-15 litters per condition) which then delivered chronic, zero order kinetic low-level infusions of 0, 114 or 228 ug/day of diazinon throughout pregnancy. One male and one female from each litter was assessed with a battery of behavioral tests that continued from four weeks of age into adulthood. Litter was used as the unit of variance for the analysis of variance test of significance, with sex as a within litter factor. Diazinon treatment condition was the between subjects factor and time or sessions were repeated measures. Chronic diazinon exposure from pre-mating until the neonatal period caused a significant (p < 0.05) increase in percent of time spent on the open arms of the elevated plus maze, an index of risk-taking behavior. Gestational and lactational diazinon exposure also caused a significant (p < 0.05) degree of hyperactivity in the Figure-8 apparatus during adolescence, specifically affecting the early part of the hour-long test session. This effect had dissipated by the time the rats reached adulthood. Diazinon exposure also caused a significant impairment in novel object recognition, a test of cognitive function. Offspring exposed to 228 ug/day diazinon (p < 0.05) showed significantly less preference for the novel vs. familiar object than controls during the first five minutes of the novel object recognition test.
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Camacho L, Lewis S, Vanlandingham M, Olson G, Davis K, Patton R, Twaddle N, Doerge D, Churchwell M, Bryant M, McLellen F, Woodling K, Felton R, Maisha M, Juliar B, Gamboa da Costa G, Delclos K. A two-year toxicology study of bisphenol A (BPA) in Sprague-Dawley rats: CLARITY-BPA core study results. Food Chem Toxicol 2019; 132:110728. [DOI: 10.1016/j.fct.2019.110728] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/25/2019] [Accepted: 07/26/2019] [Indexed: 02/06/2023]
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Dehnert GK, Freitas MB, De Quattro ZA, Barry T, Karasov WH. Effects of Low, Subchronic Exposure of 2,4-Dichlorophenoxyacetic Acid (2,4-d) and Commercial 2,4-d Formulations on Early Life Stages of Fathead Minnows (Pimephales promelas). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2019; 38:1382-1385. [PMID: 31251846 DOI: 10.1002/etc.4426] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- Gavin K Dehnert
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Mariella B Freitas
- Department of Animal Biology, Federal University of Viçosa, Viçosa, Minas Gerais, Brazil
| | - Zachary A De Quattro
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Terence Barry
- Department of Animal Science, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - William H Karasov
- Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, Wisconsin, USA
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Neier K, Cheatham D, Bedrosian LD, Gregg BE, Song PXK, Dolinoy DC. Longitudinal Metabolic Impacts of Perinatal Exposure to Phthalates and Phthalate Mixtures in Mice. Endocrinology 2019; 160:1613-1630. [PMID: 31125050 PMCID: PMC6589074 DOI: 10.1210/en.2019-00287] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 05/20/2019] [Indexed: 12/16/2022]
Abstract
Developmental exposures to phthalates are suspected to contribute to risk of metabolic syndrome. However, findings from human studies are inconsistent, and long-term metabolic impacts of early-life phthalate and phthalate mixture exposures are not fully understood. Furthermore, most animal studies investigating metabolic impacts of developmental phthalate exposures have focused on diethylhexyl phthalate (DEHP), whereas newer phthalates, such as diisononyl phthalate (DINP), are understudied. We used a longitudinal mouse model to evaluate long-term metabolic impacts of perinatal exposures to three individual phthalates, DEHP, DINP, and dibutyl phthalate (DBP), as well as two mixtures (DEHP+DINP and DEHP+DINP+DBP). Phthalates were administered to pregnant and lactating females through phytoestrogen-free chow at the following exposure levels: 25 mg of DEHP/kg of chow, 25 mg of DBP/kg of chow, and 75 mg of DINP/kg of chow. One male and female per litter (n = 9 to 13 per sex per group) were weaned onto control chow and followed until 10 months of age. They underwent metabolic phenotyping at 2 and 8 months, and adipokines were measured in plasma collected at 10 months. Longitudinally, females perinatally exposed to DEHP only had increased body fat percentage and decreased lean mass percentage, whereas females perinatally exposed to DINP only had impaired glucose tolerance. Perinatal phthalate exposures also modified the relationship between body fat percentage and plasma adipokine levels at 10 months in females. Phthalate-exposed males did not exhibit statistically significant differences in the measured longitudinal metabolic outcomes. Surprisingly, perinatal phthalate mixture exposures were statistically significantly associated with few metabolic effects and were not associated with larger effects than single exposures, revealing complexities in metabolic effects of developmental phthalate mixture exposures.
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Affiliation(s)
- Kari Neier
- Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Drew Cheatham
- Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Leah D Bedrosian
- Epidemiology, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Brigid E Gregg
- Pediatric Endocrinology, University of Michigan, Ann Arbor, Michigan
| | - Peter X K Song
- Biostatistics, University of Michigan School of Public Health, Ann Arbor, Michigan
| | - Dana C Dolinoy
- Environmental Health Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
- Nutritional Sciences, University of Michigan School of Public Health, Ann Arbor, Michigan
- Correspondence: Dana C. Dolinoy, PhD, Environmental Health Sciences and Nutritional Sciences, University of Michigan School of Public Health, 1415 Washington Heights, Ann Arbor, Michigan 48109. E-mail:
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Miret NV, Pontillo CA, Zárate LV, Kleiman de Pisarev D, Cocca C, Randi AS. Impact of endocrine disruptor hexachlorobenzene on the mammary gland and breast cancer: The story thus far. ENVIRONMENTAL RESEARCH 2019; 173:330-341. [PMID: 30951959 DOI: 10.1016/j.envres.2019.03.054] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/19/2019] [Accepted: 03/21/2019] [Indexed: 06/09/2023]
Abstract
Breast cancer incidence is increasing globally and exposure to endocrine disruptors has gained importance as a potential risk factor. Hexachlorobenzene (HCB) was once used as a fungicide and, despite being banned, considerable amounts are still released into the environment. HCB acts as an endocrine disruptor in thyroid, uterus and mammary gland and was classified as possibly carcinogenic to human. This review provides a thorough analysis of results obtained in the last 15 years of research and evaluates data from assays in mammary gland and breast cancer in diverse animal models. We discuss the effects of environmentally relevant HCB concentrations on the normal mammary gland and different stages of carcinogenesis, and attempt to elucidate its mechanisms of action at molecular level. HCB weakly binds to the aryl hydrocarbon receptor (AhR), activating both membrane (c-Src) and nuclear pathways. Through c-Src stimulation, AhR signaling interacts with other membrane receptors including estrogen receptor-α, insulin-like growth factor-1 receptor, epidermal growth factor receptor and transforming growth factor beta 1 receptors. In this way, several pathways involved in mammary morphogenesis and breast cancer development are modified, inducing tumor progression. HCB thus stimulates epithelial cell proliferation, preneoplastic lesions and alterations in mammary gland development as well as neoplastic cell migration and invasion, metastasis and angiogenesis in breast cancer. In conclusion, our findings support the hypothesis that the presence and bioaccumulation of HCB in high-fat tissues and during highly sensitive time windows such as pregnancy, childhood and adolescence make exposure a risk factor for breast tumor development.
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Affiliation(s)
- Noelia V Miret
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, Paraguay 2155, 5to piso, CP1121, Buenos Aires, Argentina.
| | - Carolina A Pontillo
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, Paraguay 2155, 5to piso, CP1121, Buenos Aires, Argentina.
| | - Lorena V Zárate
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, Paraguay 2155, 5to piso, CP1121, Buenos Aires, Argentina.
| | - Diana Kleiman de Pisarev
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, Paraguay 2155, 5to piso, CP1121, Buenos Aires, Argentina.
| | - Claudia Cocca
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Laboratorio de Radioisótopos, Junín 954, subsuelo, CP1113, Buenos Aires, Argentina.
| | - Andrea S Randi
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, Paraguay 2155, 5to piso, CP1121, Buenos Aires, Argentina.
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Rattan S, Brehm E, Gao L, Niermann S, Flaws JA. Prenatal exposure to di(2-ethylhexyl) phthalate disrupts ovarian function in a transgenerational manner in female mice. Biol Reprod 2019; 98:130-145. [PMID: 29165555 DOI: 10.1093/biolre/iox154] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 11/17/2017] [Indexed: 01/04/2023] Open
Abstract
Di(2-ethylhexyl) phthalate (DEHP) is a plasticizer found in polyvinyl chloride products such as vinyl flooring, plastic food containers, medical devices, and children's toys. DEHP is a ubiquitous environmental contaminant and is a known endocrine disrupting chemical. Little is known about the effects of prenatal DEHP exposure on the ovary and whether effects occur in subsequent generations. Thus, we tested the hypothesis that prenatal exposure to DEHP disrupts ovarian functions in the F1, F2, and F3 generations of female mice. To test this hypothesis, pregnant CD-1 mice were orally dosed with corn oil (vehicle control) or DEHP (20 and 200 μg/kg/day and 200, 500, and 750 mg/kg/day) daily from gestation day 10.5 until birth (7-28 dams/treatment group). F1 females were mated with untreated males to obtain the F2 generation, and F2 females were mated with untreated males to produce the F3 generation. On postnatal days 1, 8, 21, and 60, ovaries were collected and used for histological evaluation of follicle numbers and sera were used to measure progesterone, testosterone, 17β-estradiol, luteinizing hormone, and follicle stimulating hormone levels. In the F1 generation, prenatal exposure to DEHP disrupted body and organ weights, decreased folliculogenesis, and increased serum 17β-estradiol levels. In the F2 generation, exposure to DEHP decreased body and organ weights, dysregulated folliculogenesis, and disrupted serum progesterone levels. In the F3 generation, DEHP exposure accelerated folliculogenesis. These data suggest that prenatal exposure to DEHP leads to adverse multigenerational and transgenerational effects on ovarian function.
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Affiliation(s)
| | | | | | - Sarah Niermann
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Illinois, USA
| | - Jodi A Flaws
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Illinois, USA
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Rattan S, Brehm E, Gao L, Flaws JA. Di(2-Ethylhexyl) Phthalate Exposure During Prenatal Development Causes Adverse Transgenerational Effects on Female Fertility in Mice. Toxicol Sci 2019; 163:420-429. [PMID: 29471507 DOI: 10.1093/toxsci/kfy042] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Di(2-ethylhexyl) phthalate (DEHP) is a ubiquitous environmental toxicant and endocrine disrupting chemical, but little is known about its effects on female reproduction. Thus, we tested the hypothesis that prenatal exposure to DEHP accelerates the onset of puberty, disrupts estrous cyclicity, disrupts birth outcomes, and reduces fertility in the F1, F2, and F3 generations of female mice. Pregnant CD-1 mice were orally dosed with corn oil (vehicle control) or DEHP (20 and 200 µg/kg/day and 500 and 750 mg/kg/day) from gestation day 10.5 until birth. F1 females were mated with untreated males to obtain the F2 generation. F2 females were mated with untreated males to produce the F3 generation. In all generations, the onset of puberty, estrous cyclicity, select birth outcomes, and fertility-related indices were evaluated. In the F1 generation, prenatal DEHP exposure (200 µg/kg/day) accelerated the onset of puberty, it (200 µg and 500 mg/kg/day) disrupted estrous cyclicity, and it (20 and 200 µg/kg/day) decreased fertility-related indices. In the F2 generation, ancestral DEHP exposure (500 mg/kg/day) accelerated the onset of puberty, it (20 and 200 µg/kg/day) disrupted estrous cyclicity, it (20 µg and 500 mg/kg/day) increased litter size, and it (500 mg/kg/day) decreased fertility-related indices. In the F3 generation, ancestral DEHP exposure (20, 200 µg, and 500 mg/kg/day) accelerated the onset of puberty, it (20 µg/kg/day) disrupted estrous cyclicity, and it (750 mg/kg/day) decreased female pup anogenital index. Collectively, these data indicate that prenatal DEHP exposure causes female reproductive problems in a multigenerational and transgenerational manner.
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Affiliation(s)
- Saniya Rattan
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802
| | - Emily Brehm
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802
| | - Liying Gao
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802
| | - Jodi A Flaws
- Department of Comparative Biosciences, University of Illinois at Urbana-Champaign, Urbana, Illinois 61802
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Repouskou A, Panagiotidou E, Panagopoulou L, Bisting PL, Tuck AR, Sjödin MOD, Lindberg J, Bozas E, Rüegg J, Gennings C, Bornehag CG, Damdimopoulou P, Stamatakis A, Kitraki E. Gestational exposure to an epidemiologically defined mixture of phthalates leads to gonadal dysfunction in mouse offspring of both sexes. Sci Rep 2019; 9:6424. [PMID: 31015488 PMCID: PMC6478857 DOI: 10.1038/s41598-019-42377-6] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 03/29/2019] [Indexed: 11/17/2022] Open
Abstract
The increasing concern for the reproductive toxicity of abundantly used phthalates requires reliable tools for exposure risk assessment to mixtures of chemicals, based on real life human exposure and disorder-associated epidemiological evidence. We herein used a mixture of four phthalate monoesters (33% mono-butyl phthalate, 16% mono-benzyl phthalate, 21% mono-ethyl hexyl phthalate, and 30% mono-isononyl phthalate), detected in 1st trimester urine of 194 pregnant women and identified as bad actors for a shorter anogenital distance (AGD) in their baby boys. Mice were treated with 0, 0.26, 2.6 and 13 mg/kg/d of the mixture, corresponding to 0x, 10x, 100x, 500x levels detected in the pregnant women. Adverse outcomes detected in the reproductive system of the offspring in pre-puberty and adulthood included reduced AGD index and gonadal weight, changes in gonadal histology and altered expression of key regulators of gonadal growth and steroidogenesis. Most aberrations were apparent in both sexes, though more pronounced in males, and exhibited a non-monotonic pattern. The phthalate mixture directly affected expression of steroidogenesis as demonstrated in a relevant in vitro model. The detected adversities at exposures close to the levels detected in pregnant women, raise concern on the existing safety limits for early-life human exposures and emphasizes the need for re-evaluation of the exposure risk.
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Affiliation(s)
- Anastasia Repouskou
- Laboratory of Basic Sciences, Faculty of Dentistry, School of Health Sciences, National and Kapodistrian University of Athens (NKUA), Athens, Greece
| | - Emily Panagiotidou
- Laboratory of Basic Sciences, Faculty of Dentistry, School of Health Sciences, National and Kapodistrian University of Athens (NKUA), Athens, Greece
- Biology-Biochemistry laboratory, Faculty of Nursing, School of Health Sciences, NKUA, Athens, Greece
| | - Lydia Panagopoulou
- Laboratory of Basic Sciences, Faculty of Dentistry, School of Health Sciences, National and Kapodistrian University of Athens (NKUA), Athens, Greece
| | | | - Astrud R Tuck
- Swetox, Karolinska Institutet, Unit of Toxicological Sciences, Södertälje, Sweden
| | - Marcus O D Sjödin
- Swetox, Karolinska Institutet, Unit of Toxicological Sciences, Södertälje, Sweden
| | - Johan Lindberg
- Swetox, Karolinska Institutet, Unit of Toxicological Sciences, Södertälje, Sweden
| | - Evangelos Bozas
- Pediatric Research laboratory, Faculty of Nursing, School of Health Sciences, NKUA, Athens, Greece
| | - Joëlle Rüegg
- Swetox, Karolinska Institutet, Unit of Toxicological Sciences, Södertälje, Sweden
- IMM -Institute for Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Chris Gennings
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Carl-Gustaf Bornehag
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Karlstad University, Karlstad, Sweden
| | - Pauliina Damdimopoulou
- Swetox, Karolinska Institutet, Unit of Toxicological Sciences, Södertälje, Sweden
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Antonios Stamatakis
- Biology-Biochemistry laboratory, Faculty of Nursing, School of Health Sciences, NKUA, Athens, Greece
| | - Efthymia Kitraki
- Laboratory of Basic Sciences, Faculty of Dentistry, School of Health Sciences, National and Kapodistrian University of Athens (NKUA), Athens, Greece.
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Agathokleous E, Anav A, Araminiene V, De Marco A, Domingos M, Kitao M, Koike T, Manning WJ, Paoletti E, Saitanis CJ, Sicard P, Vitale M, Wang W, Calabrese EJ. Commentary: EPA's proposed expansion of dose-response analysis is a positive step towards improving its ecological risk assessment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 246:566-570. [PMID: 30594897 DOI: 10.1016/j.envpol.2018.12.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 12/11/2018] [Accepted: 12/15/2018] [Indexed: 05/17/2023]
Abstract
The United States Environmental Protection Agency (US EPA) has recently proposed changes to strengthen the transparency of its pivotal regulatory science policy and procedures. In this context, the US EPA aims to enhance the transparency of dose-response data and models, proposing to consider for the first time non-linear biphasic dose-response models. While the proposed changes have the potential to lead to markedly improved ecological risk assessment compared to past and current approaches, we believe there remain open issues for improving the quality of ecological risk assessment, such as the consideration of adaptive, dynamic and interactive effects. Improved risk assessment including adaptive and dynamic non-linear models (beyond classic threshold models) can enhance the quality of regulatory decisions and the protection of ecological health. We suggest that other countries consider adopting a similar scientific-regulatory posture with respect to dose-response modeling via the inclusion of non-linear biphasic models, that incorporate the dynamic potential of biological systems to adapt (i.e., enhancing positive biological endpoints) or maladapt to low levels of stressor agents.
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Affiliation(s)
- Evgenios Agathokleous
- Hokkaido Research Center, Forestry and Forest Products Research Institute (FFPRI), Forest Research and Management Organization, 7 Hitsujigaoka, Sapporo, Hokkaido, 062-8516, Japan; Research Faculty of Agriculture, Hokkaido University, Kita 9 Nishi 9, Sapporo, Hokkaido, 060-8589, Japan.
| | - Alessandro Anav
- National Council of Research, Via Madonna del Piano 10, Sesto Fiorentino, Florence, 50019, Italy
| | - Valda Araminiene
- Institute of Forestry, Lithuanian Research Centre for Agriculture and Forestry, Girionys, 53101, Kaunas district, Lithuania
| | - Alessandra De Marco
- Italian National Agency for New Technologies, Energy and the Environment (ENEA), C.R. Casaccia, S. Maria di Galeria, Rome, 00123, Italy
| | - Marisa Domingos
- Instituto de Botânica, Núcleo de Pesquisa em Ecologia, PO Box 68041, 04045-972, SP, Brazil
| | - Mitsutoshi Kitao
- Hokkaido Research Center, Forestry and Forest Products Research Institute (FFPRI), Forest Research and Management Organization, 7 Hitsujigaoka, Sapporo, Hokkaido, 062-8516, Japan
| | - Takayoshi Koike
- Research Faculty of Agriculture, Hokkaido University, Kita 9 Nishi 9, Sapporo, Hokkaido, 060-8589, Japan
| | - William J Manning
- Department of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, MA, USA
| | - Elena Paoletti
- National Council of Research, Via Madonna del Piano 10, Sesto Fiorentino, Florence, 50019, Italy
| | - Costas J Saitanis
- Lab of Ecology and Environmental Science, Agricultural University of Athens, Iera Odos 75, Athens, 11855, Greece
| | - Pierre Sicard
- ARGANS, 260 route du Pin Montard, Sophia Antipolis cedex, 06904, France
| | - Marcello Vitale
- Department of Environmental Biology, Sapienza University of Rome, Piazzale Aldo Moro 5, Rome, 00185, Italy
| | - Wenjie Wang
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China; Northeast Forestry University, Harbin, 150040, China
| | - Edward J Calabrese
- Department of Environmental Health Sciences, Morrill I, N344, University of Massachusetts, Amherst, MA, 01003, USA
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Davoren MJ, Schiestl RH. Glyphosate-based herbicides and cancer risk: a post-IARC decision review of potential mechanisms, policy and avenues of research. Carcinogenesis 2018; 39:1207-1215. [PMID: 30060078 PMCID: PMC7530464 DOI: 10.1093/carcin/bgy105] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 07/04/2018] [Accepted: 07/27/2018] [Indexed: 12/13/2022] Open
Abstract
Since its initial sales in the 1970s, the herbicide glyphosate attained widespread use in modern agriculture, becoming the most commercially successful and widely used herbicide of all time as of 2016. Despite a primary mechanism that targets a pathway absent from animal cells and regulatory studies showing safety margins orders of magnitude better than many other, more directly toxic herbicides, the safety status of glyphosate has recently been brought into question by a slow accumulation of studies suggesting more subtle health risks, especially when considered in combination with the surfactants it is usually applied with. Current, official views of respected international regulatory and health bodies remain divided on glyphosate's status as a human carcinogen, but the 2015 International Agency for Research on Cancer decision to reclassify the compound as Category 2A (probably carcinogenic to humans) marked a sea change in the scientific community's consensus view. The goal of this review is to consider the state of science regarding glyphosate's potential as a human carcinogen and genotoxin, with particular focus on studies suggesting mechanisms that would go largely undetected in traditional toxicology studies, such as microbiome disruption and endocrine mimicry at very low concentrations.
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Affiliation(s)
- Michael J Davoren
- Molecular Toxicology Interdepartmental Program, University of California, Los Angeles, CA, USA
| | - Robert H Schiestl
- Molecular Toxicology Interdepartmental Program, University of California, Los Angeles, CA, USA
- Pathology and Laboratory Medicine, University of California, Los Angeles, CA, USA
- Environmental Health Science, University of California, Los Angeles, CA, USA
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45
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Hill CE, Myers JP, Vandenberg LN. Nonmonotonic Dose-Response Curves Occur in Dose Ranges That Are Relevant to Regulatory Decision-Making. Dose Response 2018; 16:1559325818798282. [PMID: 30228814 PMCID: PMC6137554 DOI: 10.1177/1559325818798282] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 07/18/2018] [Accepted: 07/24/2018] [Indexed: 11/21/2022] Open
Abstract
Non-monotonic dose response curves (NMDRCs) occur in cells, tissues, animals and
human populations in response to nutrients, vitamins, pharmacological compounds,
hormones and endocrine disrupting chemicals (EDCs). Yet, regulatory agencies
have argued that NMDRCs are not common, are not found for adverse outcomes, and
are not relevant for regulation of EDCs. Under the linear dose response model,
high dose testing is used to extrapolate to lower doses that are anticipated to
be ‘safe’ for human exposures. NMDRCs that occur below the toxicological
no-observed-adverse-effect level (NOAEL) would falsify a fundamental assumption,
that high dose hazards can be used to predict low dose safety. In this
commentary, we provide examples of NMDRCs and discuss how their presence in
different portions of the dose response curve might affect regulatory decisions.
We provide evidence that NMDRCs do occur below the NOAEL dose, and even below
the ‘safe’ reference dose, for chemicals such as resveratrol, permethrin,
chlorothalonil, and phthalates such as DEHP. We also briefly discuss the recent
CLARITY-BPA study, which reported mammary adenocarcinomas only in rats exposed
to the lowest BPA dose. We conclude our commentary with suggestions for how
NMDRCs should be acknowledged and utilized to improve regulatory toxicity
testing and in the calculation of reference doses that are public health
protective.
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Affiliation(s)
- Corinne E Hill
- Department of Environmental Health Sciences, School of Public Health and Health Sciences, Amherst, MA, USA
| | - J P Myers
- Environmental Health Sciences, Charlottesville, VA, USA
| | - Laura N Vandenberg
- Department of Environmental Health Sciences, School of Public Health and Health Sciences, Amherst, MA, USA
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Wang X, Wang L, Zhang J, Yin W, Hou J, Zhang Y, Hu C, Wang G, Zhang R, Tao Y, Yuan J. Dose-response relationships between urinary phthalate metabolites and serum thyroid hormones among waste plastic recycling workers in China. ENVIRONMENTAL RESEARCH 2018; 165:63-70. [PMID: 29665466 DOI: 10.1016/j.envres.2018.04.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 03/16/2018] [Accepted: 04/05/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Exposure to phthalates may affect thyroid hormone status. However, there were inconsistent observations for the associations of phthalates exposure with altered thyroid hormones. OBJECTIVES The aim of this study was to investigate effects of urinary excretion of phthalate metabolites on the levels of thyroid hormones among workers engaged in waste plastic recycling in China. METHODS We measured serum levels of thyroid hormones and urinary levels of eight phthalate metabolites among 317 participants (165 workers engaged in waste plastic recycling and 152 farmers), analyzed relationships between urinary phthalate metabolites and thyroid function parameters by multivariate linear regression analysis and structural equation modelling as well as assessed the dose-response relationships between them by restricted cubic spline functions. RESULTS Maximum urinary values of eight phthalate metabolites in the occupational exposed workers were higher than the controls. Compared with the controls, the workers had higher levels of urinary monobenzyl phthalate (MBzP, 1.12 vs. 0.92 μg/g creatinine), mono (2-ethyl-5-hydroxyhexyl) phthalate (MEHHP, 38.84 vs. 32.55 μg/g creatinine), mono-n-octyl phthalate (MOP, .11 vs. 0.09 μg/g creatinine), serum total triiodothyronine (T3, 1.04 vs. 0.92 ng/mL) and the T3 to thyroxine (T4) ratio (1.44 vs. 1.09) (all P < 0.05). The results from structural equation modelling analysis showed that phthalates metabolites were positively associated with total T3 (β = 0.044, SE = 0.021, P < 0.05) or the T3/T4 ratio (β = 0.053, SE = 0.022, P < 0.05) among all participants. Among the workers, there were the non-monotonic dose-response associations between urinary monomethyl phthalate (MMP) and serum total T3 or the T3/T4 ratio, as well as between urinary monoethyl phthalate (MEP) and the T3/T4 ratio (all P < 0.05). CONCLUSIONS The dose-response relationships between urinary phthalate metabolites and thyroid hormone parameters may be non-monotonic among the workers. Further investigations are needed to corroborate these findings.
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Affiliation(s)
- Xian Wang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China
| | - Li Wang
- National Center for Rural Water Supply Technical Guidance, Chinese Center for Disease Control and Prevention, Beijing 102200, PR. China
| | - Jiafei Zhang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China
| | - Wenjun Yin
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China
| | - Jian Hou
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China
| | - Youjian Zhang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China
| | - Chen Hu
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China
| | - Guiyang Wang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China
| | - Rong Zhang
- National Center for Rural Water Supply Technical Guidance, Chinese Center for Disease Control and Prevention, Beijing 102200, PR. China.
| | - Yong Tao
- National Center for Rural Water Supply Technical Guidance, Chinese Center for Disease Control and Prevention, Beijing 102200, PR. China
| | - Jing Yuan
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China; Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR. China.
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47
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Poet T, Hays S. Extrapolation of plasma clearance to understand species differences in toxicokinetics of bisphenol A. Xenobiotica 2017; 48:891-897. [DOI: 10.1080/00498254.2017.1379626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Torka Poet
- Summit Toxicology, L.L.P, Richland, WA, USA and
| | - Sean Hays
- Summit Toxicology, L.L.P, Bozeman, MT, USA
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48
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Villar-Pazos S, Martinez-Pinna J, Castellano-Muñoz M, Alonso-Magdalena P, Marroqui L, Quesada I, Gustafsson JA, Nadal A. Molecular mechanisms involved in the non-monotonic effect of bisphenol-a on ca2+ entry in mouse pancreatic β-cells. Sci Rep 2017; 7:11770. [PMID: 28924161 PMCID: PMC5603522 DOI: 10.1038/s41598-017-11995-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 08/29/2017] [Indexed: 12/16/2022] Open
Abstract
In regulatory toxicology, the dose-response relationship is a key element towards fulfilling safety assessments and satisfying regulatory authorities. Conventionally, the larger the dose, the greater the response, following the dogma “the dose makes the poison”. Many endocrine disrupting chemicals, including bisphenol-A (BPA), induce non-monotonic dose response (NMDR) relationships, which are unconventional and have tremendous implications in risk assessment. Although several molecular mechanisms have been proposed to explain NMDR relationships, they are largely undemonstrated. Using mouse pancreatic β-cells from wild-type and oestrogen receptor ERβ−/− mice, we found that exposure to increasing doses of BPA affected Ca2+ entry in an NMDR manner. Low doses decreased plasma membrane Ca2+ currents after downregulation of Cav2.3 ion channel expression, in a process involving ERβ. High doses decreased Ca2+ currents through an ERβ-mediated mechanism and simultaneously increased Ca2+ currents via oestrogen receptor ERα. The outcome of both molecular mechanisms explains the NMDR relationship between BPA and Ca2+ entry in β-cells.
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Affiliation(s)
- Sabrina Villar-Pazos
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM) and Institute of Bioenginering, Miguel Hernández University of Elche, Elche, Alicante, Spain
| | - Juan Martinez-Pinna
- Departamento de Fisiología, Genética y Microbiología, Universidad de Alicante, Alicante, Spain
| | - Manuel Castellano-Muñoz
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM) and Institute of Bioenginering, Miguel Hernández University of Elche, Elche, Alicante, Spain
| | - Paloma Alonso-Magdalena
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM) and Institute of Bioenginering, Miguel Hernández University of Elche, Elche, Alicante, Spain
| | - Laura Marroqui
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM) and Institute of Bioenginering, Miguel Hernández University of Elche, Elche, Alicante, Spain
| | - Ivan Quesada
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM) and Institute of Bioenginering, Miguel Hernández University of Elche, Elche, Alicante, Spain
| | - Jan-Ake Gustafsson
- Department of Cell Biology and Biochemistry, Center for Nuclear Receptors and Cell Signaling, University of Houston, Houston, Texas, USA.,Department of Biosciences and Nutrition, Karolinska Institut, Huddinge, Sweden
| | - Angel Nadal
- CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM) and Institute of Bioenginering, Miguel Hernández University of Elche, Elche, Alicante, Spain.
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49
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Windsor FM, Ormerod SJ, Tyler CR. Endocrine disruption in aquatic systems: up-scaling research to address ecological consequences. Biol Rev Camb Philos Soc 2017; 93:626-641. [PMID: 28795474 PMCID: PMC6849538 DOI: 10.1111/brv.12360] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 07/10/2017] [Accepted: 07/12/2017] [Indexed: 12/11/2022]
Abstract
Endocrine‐disrupting chemicals (EDCs) can alter biological function in organisms at environmentally relevant concentrations and are a significant threat to aquatic biodiversity, but there is little understanding of exposure consequences for populations, communities and ecosystems. The pervasive nature of EDCs within aquatic environments and their multiple sub‐lethal effects make assessments of their impact especially important but also highly challenging. Herein, we review the data on EDC effects in aquatic systems focusing on studies assessing populations and ecosystems, and including how biotic and abiotic processes may affect, and be affected by, responses to EDCs. Recent research indicates a significant influence of behavioural responses (e.g. enhancing feeding rates), transgenerational effects and trophic cascades in the ecological consequences of EDC exposure. In addition, interactions between EDCs and other chemical, physical and biological factors generate uncertainty in our understanding of the ecological effects of EDCs within aquatic ecosystems. We illustrate how effect thresholds for EDCs generated from individual‐based experimental bioassays of the types commonly applied using chemical test guidelines [e.g. Organisation for Economic Co‐operation and Development (OECD)] may not necessarily reflect the hazards associated with endocrine disruption. We argue that improved risk assessment for EDCs in aquatic ecosystems urgently requires more ecologically oriented research as well as field‐based assessments at population‐, community‐ and food‐web levels.
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Affiliation(s)
- Fredric M Windsor
- School of Biosciences, Cardiff University, Cardiff, CF10 3AX, U.K.,Department of Biosciences, University of Exeter, Exeter, EX4 4PS, U.K
| | - Steve J Ormerod
- School of Biosciences, Cardiff University, Cardiff, CF10 3AX, U.K
| | - Charles R Tyler
- Department of Biosciences, University of Exeter, Exeter, EX4 4PS, U.K
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50
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Parrott JL, Bjerregaard P, Brugger KE, Gray LE, Iguchi T, Kadlec SM, Weltje L, Wheeler JR. Uncertainties in biological responses that influence hazard and risk approaches to the regulation of endocrine active substances. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2017; 13:293-301. [PMID: 27862884 PMCID: PMC8215718 DOI: 10.1002/ieam.1866] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 09/19/2016] [Accepted: 11/09/2016] [Indexed: 05/18/2023]
Abstract
Endocrine-disrupting substances (EDS) may have certain biological effects including delayed effects, multigenerational effects, and may display nonmonotonic dose-response (NMDR) relationships that require careful consideration when determining environmental hazards. Endocrine disrupting substances can have specific and profound effects when exposure occurs during sensitive windows of the life cycle (development, reproduction). This creates the potential for delayed effects that manifest when exposure has ceased, possibly in a different life stage. This potential underscores the need for testing in appropriate (sensitive) life stages and full life cycle designs. Such tests are available in the Organisation for Economic Co-operation and Development (OECD) tool box and should be used to derive endpoints that can be considered protective of all life stages. Similarly, the potential for effects to be manifest in subsequent generations (multigenerational effects) has also been raised as a potential issue in the derivation of appropriate endpoints for EDS. However, multigenerational studies showing increasing sensitivity of successive generations are uncommon. Indeed this is reflected in the design of new higher tier tests to assess endocrine active substances (EAS) that move to extended one-generation designs and away from multi-generational studies. The occurrence of NMDRs is also considered a limiting factor for reliable risk assessment of EDS. Evidence to date indicates NMDRs are more prevalent in in vitro and mechanistic data, not often translating to adverse apical endpoints that would be used in risk assessment. A series of steps to evaluate NMDRs in the context of endocrine hazard and risk assessment procedures is presented. If careful consideration of delayed, multigenerational effects and NMDRs is made, it is feasible to assess environmental endocrine hazards and derive robust apical endpoints for risk assessment procedures ensuring a high level of environmental protection. Integr Environ Assess Manag 2017;13:293-301. © 2016 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals, Inc. on behalf of Society of Environmental Toxicology & Chemistry (SETAC).
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Affiliation(s)
- Joanne L Parrott
- Environment and Climate Change Canada, Burlington, Ontario, Canada
- Address correspondence to
| | - Poul Bjerregaard
- Department of Biology, University of Southern Denmark, Odense, Denmark
| | - Kristin E Brugger
- DuPont Crop Protection, Stine-Haskell Research Center, Newark, New Jersey, USA
| | - L Earl Gray
- USEPA, Reproductive Toxicology Branch, Office of Research and Development, Research Triangle Park, North Carolina
| | - Taisen Iguchi
- Department of Bioenvironmental Research, Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences, Okazaki, Japan
| | - Sarah M Kadlec
- University of Minnesota, Integrated Biosciences Graduate Program, Duluth, Minnesota, USA
| | - Lennart Weltje
- BASF SE, Crop Protection-Ecotoxicology, Limburgerhof, Germany
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