1
|
He TT, Li X, Ma JZ, Yang Y, Zhu S, Zeng J, Luo L, Yin YL, Cao LY. Triclocarban and triclosan promote breast cancer progression in vitro and in vivo via activating G protein-coupled estrogen receptor signaling pathways. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 931:172782. [PMID: 38679099 DOI: 10.1016/j.scitotenv.2024.172782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 04/21/2024] [Accepted: 04/24/2024] [Indexed: 05/01/2024]
Abstract
Triclocarban (TCC) and triclosan (TCS) have been detected ubiquitously in human body and evoked increasing concerns. This study aimed to reveal the induction risks of TCC and TCS on triple negative breast cancer through non-genomic GPER-mediated signaling pathways. Molecular simulation indicated that TCC exhibited higher GPER binding affinity than TCS theoretically. Calcium mobilization assay displayed that TCC/TCS activated GPER signaling pathway with the lowest observed effective concentrations (LOEC) of 10 nM/100 nM. TCC and TCS also upregulated MMP-2/9, EGFR, MAPK3 but downregulated MAPK8 via GPER-mediated signaling pathway. Proliferation assay showed that TCC/TCS induced 4 T1 breast cancer cells proliferation with the LOEC of 100 nM/1000 nM. Wound-healing and transwell assays showed that TCC/TCS promoted 4 T1 cells migration in a concentration-dependent manner with the LOEC of 10 nM. The effects of TCC on breast cancer cells proliferation and migration were stronger than TCS and both were regulated by GPER. TCC/TCS induced migratory effects were more significantly than proliferative effect. Mechanism study showed that TCC/TCS downregulated the expression of epithelial marker (E-cadherin) but upregulated mesenchymal markers (snail and N-cadherin), which was reversed by GPER inhibitor G15. These biomarkers results indicated that TCC/TCS-induced 4 T1 cells migration was a classic epithelial to mesenchymal transition mechanism regulated by GPER signaling pathway. Orthotopic tumor model verified that TCC promoted breast cancer in-situ tumor growth and distal tissue metastasis via GPER-mediated signaling pathway at human-exposure level of 10 mg/kg/d. TCC-induced tissue metastasis of breast cancer was more significantly than in-situ tumor growth. Overall, we demonstrated for the first time that TCC/TCS could activate the GPER signaling pathways to induce breast cancer progression.
Collapse
Affiliation(s)
- Ting-Ting He
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Xin Li
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Jie-Zhi Ma
- Department of Obstetrics and Gynecology, Xiangya Third Hospital, Central South University, Changsha 410013, China
| | - Yuan Yang
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Shiye Zhu
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Jianhua Zeng
- College of Food Science and Engineering, Ocean University of China, Qingdao 266000, China
| | - Lin Luo
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Yu-Long Yin
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China
| | - Lin-Ying Cao
- College of Environment and Ecology, Hunan Agricultural University, Changsha 410128, China.
| |
Collapse
|
2
|
Kodavanti PRS, Costa LG, Aschner M. Perspective on halogenated organic compounds. ADVANCES IN NEUROTOXICOLOGY 2023; 10:1-25. [PMID: 37920427 PMCID: PMC10622110 DOI: 10.1016/bs.ant.2023.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
During the past century, a vast number of organic chemicals have been manufactured and used in industrial, agricultural, public health, consumer products, and other applications. The widespread use in bulk quantities of halogenated organic chemicals (HOCs; also called Organohalogens), including chlorinated, brominated, and fluorinated compounds, and their persistent nature have resulted in global environmental contamination. Increasing levels of HOCs in environmental media (i.e., air, water, soil, sediment) and in human tissues including adipose tissue, breast milk, and placenta continue to be a cause of ecological and human health concern. Human exposure can occur through multiple pathways including direct skin contact, inhalation, drinking water, and mainly through food consumption. HOCs exposure has been implicated in a myriad of health effects including reproductive, neurological, immunological, endocrine, behavioral, and carcinogenic effects in both wildlife and humans. In addition, recent studies indicate that exposure to HOCs contributes to obesity and type 2 diabetes. Because of these adverse health effects, several regulatory agencies either banned or placed severe restrictions on their production and usage. In turn, many industries withdrew from production and usage of HOCs. This action resulted in decline of older HOCs such as polychlorinated biphenyls (PCBs), but more recent HOCs such as polybrominated diphenyl ethers (PBDEs) and perfluoroalkyl substances (PFAS) show a steady increase/stable with time in the global environment. Based on their use pattern and their persistent chemical properties, human exposure to HOCs will likely continue. Hence, understanding human health effects and taking preventive measures for such exposures are necessary.
Collapse
Affiliation(s)
- Prasada Rao S. Kodavanti
- Neurological and Endocrine Toxicology Branch, PHITD/CPHEA/ORD, US Environmental Protection Agency, Research Triangle Park, NC, United States
| | - Lucio G. Costa
- Department of Environmental and Occupational Health Sciences, University of Washington, 4225 Roosevelt #100, Seattle, WA, United States
- Department of Medicine & Surgery, University of Parma, Parma, Italy
| | - Michael Aschner
- Dept of Molecular Pharmacology, Albert Einstein College of Medicine, Forchheimer 209, 1300 Morris Park Ave, Bronx, NY, United States
| |
Collapse
|
3
|
Guo Y, Ma Y, Zhong W, Zhou L, Wan Y, Zhu H, Zhang R. Associations between seminal plasma triclosan and low sperm quality: A case-control study. Eur J Obstet Gynecol Reprod Biol 2023; 283:130-135. [PMID: 36848763 DOI: 10.1016/j.ejogrb.2023.02.015] [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: 04/26/2022] [Revised: 02/07/2023] [Accepted: 02/18/2023] [Indexed: 02/25/2023]
Abstract
OBJECTIVE Triclosan (TCS), a novel endocrine disrupter, has induced widespread human exposure due to its widespread use in personal care products. Environmental TCS exposure was suggested to be associated with human semen quality. However, little is known about seminal plasma TCS concentration and the risk of low sperm quality. This case-control study is established to examine the relationship between seminal plasma TCS and the risk of low sperm quality. STUDY DESIGN One hundred men with low sperm quality as cases and one hundred normal men as controls were recruited a fertility clinic in Shijiazhuang, China, during 2018-2019. Seminal plasma TCS concentration was determined using an ultrahigh-performance liquid chromatography-tandem mass spectrometer (UPLC-MS/MS). Sperm concentration, sperm count, sperm motility and sperm progressive motility were evaluated according to World Health Organization (WHO) guidelines to assess the sperm quality. We used the Mann-Whitney rank-sum test and Kruskal-Wallis test to assess the differences of seminal plasma TCS concentration between the cases and the controls. In addition, logistic regression analysis was used to estimate the associations between seminal plasma TCS concentrations and low sperm quality risk adjusting for age, body mass index (BMI), abstinence time, smoking, and drinking RESULTS AND CONCLUSIONS: The level of seminal plasma TCS was observed slightly but not significantly higher in the case group than the control group. We also observed significant association between seminal plasma TCS concentrations and semen parameters in both control and case groups. Moreover, the seminal plasma TCS levels at the fourth quartile were found to be more likely to exhibit low sperm quality risk with increased adjusted odds ratios of 2.36 (95% confidence interval 1.03-5.39) compared to the first quartile. Our results reveal that seminal plasma TCS concentration was positively associated with low sperm quality risk.
Collapse
Affiliation(s)
- Yinsheng Guo
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, Guangdong, China.
| | - Yue Ma
- Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, Guangdong, China
| | - Weiqiang Zhong
- Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University, 10 Xitoutiao, Youanmenwai, Beijing 100069, China
| | - Lixiao Zhou
- Institute of Environmental Health, Wuhan Centers for Disease Prevention & Control, Wuhan, Hubei 430024, China
| | - Yanjian Wan
- Institute of Environmental Health, Wuhan Centers for Disease Prevention & Control, Wuhan, Hubei 430024, China
| | - Huiping Zhu
- Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University, 10 Xitoutiao, Youanmenwai, Beijing 100069, China.
| | - Rong Zhang
- Department of Toxicology, School of Public Health, Hebei Medical University, Shijiazhuang 050017, PR China; Hebei Key Laboratory of Environment and Human Health, Shijiazhuang 050017, PR China.
| |
Collapse
|
4
|
Marques AC, Mariana M, Cairrao E. Triclosan and Its Consequences on the Reproductive, Cardiovascular and Thyroid Levels. Int J Mol Sci 2022; 23:ijms231911427. [PMID: 36232730 PMCID: PMC9570035 DOI: 10.3390/ijms231911427] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/23/2022] [Accepted: 09/26/2022] [Indexed: 11/25/2022] Open
Abstract
Hygiene is essential to avoid diseases, and this is thanks to daily cleaning and disinfection habits. Currently, there are numerous commercial products containing antimicrobial agents, and although they are efficient in disinfecting, it is still not known the effect of the constant use of these products on human health. In fact, a massive use of disinfectants has been observed due to COVID-19, but the possible adverse effects are not yet known. Triclosan is one of the antimicrobial agents used in cosmetic products, toothpaste, and disinfectants. This compound is an endocrine disruptor, which means it can interfere with hormonal function, with its estrogenic and androgenic activity having already been stated. Even if the use of triclosan is well-regulated, with the maximum allowed concentration in the European Union of 0.3% (m/m), its effects on human health are still uncertain. Studies in animals and humans suggest the possibility of harmful health outcomes, particularly for the reproductive system, and in a less extent for the cardiovascular and thyroid functions. Thus, the purpose of this review was to analyse the possible implications of the massive use of triclosan, mainly on the reproductive and cardiovascular systems and on the thyroid function, both in animals and humans.
Collapse
Affiliation(s)
- Ana C. Marques
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, 6200-506 Covilhã, Portugal
- Faculty of Health Sciences (FCS-UBI), University of Beira Interior, 6200-506 Covilhã, Portugal
| | - Melissa Mariana
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, 6200-506 Covilhã, Portugal
- Faculty of Health Sciences (FCS-UBI), University of Beira Interior, 6200-506 Covilhã, Portugal
| | - Elisa Cairrao
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, 6200-506 Covilhã, Portugal
- Faculty of Health Sciences (FCS-UBI), University of Beira Interior, 6200-506 Covilhã, Portugal
- Correspondence: ; Tel.: +351-275-329-049
| |
Collapse
|
5
|
Montagnini BG, Forcato S, Pernoncine KV, Monteiro MC, Pereira MRF, Costa NO, Moreira EG, Anselmo-Franci JA, Gerardin DCC. Developmental and Reproductive Outcomes in Male Rats Exposed to Triclosan: Two-Generation Study. Front Endocrinol (Lausanne) 2021; 12:738980. [PMID: 34721297 PMCID: PMC8548666 DOI: 10.3389/fendo.2021.738980] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Accepted: 09/20/2021] [Indexed: 11/29/2022] Open
Abstract
Triclosan (TCS) is a phenolic compound with broad-spectrum antimicrobial action that has been incorporated into a variety of personal care products and other industry segments such as toys, textiles, and plastics. Due to its widespread use, TCS and its derivatives have been detected in several environmental compartments, with potential bioaccumulation and persistence. Indeed, some studies have demonstrated that TCS may act as a potential endocrine disruptor for the reproductive system. In the current study, we are reporting on the results obtained for male rats after a two-generation reproduction toxicity study conducted with TCS. Female and male Wistar rats were treated daily by gavage with TCS at doses of 0.8, 2.4, and 8.0 mg/kg/day or corn oil (control group) over 10 weeks (F0) and over 14 weeks (F1) before mating and then throughout mating, until weaning F2 generations, respectively. TCS exposure decreased sperm viability and motility of F1 rats at the dose of 2.4 mg/kg. The effects of TCS on sperm quality may be related to the exposure window, which includes the programming of reproductive cells that occurs during fetal/neonatal development.
Collapse
Affiliation(s)
- Bruno Garcia Montagnini
- Laboratory of Pharmacology of Reproduction, Biological Sciences Center, Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Simone Forcato
- Laboratory of Pharmacology of Reproduction, Biological Sciences Center, Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Karine Vandressa Pernoncine
- Laboratory of Pharmacology of Reproduction, Biological Sciences Center, Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Mariana Cunha Monteiro
- Laboratory of Pharmacology of Reproduction, Biological Sciences Center, Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Marina Rangel Ferro Pereira
- Laboratory of Pharmacology of Reproduction, Biological Sciences Center, Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Nathalia Orlandini Costa
- Laboratory of Pharmacology of Reproduction, Biological Sciences Center, Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Estefânia Gastadello Moreira
- Laboratory of Pharmacology of Reproduction, Biological Sciences Center, Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| | - Janete Aparecida Anselmo-Franci
- Department of Morphology, Stomatology and Physiology, Dental School of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Daniela Cristina Ceccatto Gerardin
- Laboratory of Pharmacology of Reproduction, Biological Sciences Center, Department of Physiological Sciences, State University of Londrina, Londrina, Brazil
| |
Collapse
|
6
|
Yoon KS, Kwack SJ. In vitro and in vivo estrogenic activity of triclosan. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2021; 84:800-809. [PMID: 34193021 DOI: 10.1080/15287394.2021.1944940] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Triclosan (TCS) is an antibacterial and antifungal agent used in many consumer products and exhibits a chemical structure similar to non-steroidal estrogen, which is known to induce endocrine disruption. Triclosan has been found in human plasma, urine, and breast milk, and the safety of TCS-containing products has been disputed. Although studies attempted to determine the estrogenic activity of TCS, no clear results have emerged. The aim of the present study was to examine estrogenic activity of TCS using an in vitro E-screen assay and an in vivo uterotrophic assay. The in vitro E-screen assay demonstrated that TCS significantly enhanced proliferation of MCF-7 breast cancer cells, although not in a concentration-dependent manner. The in vivo uterotrophic results showed no significant change in the weight of uteri obtained from TCS-administered Sprague-Dawley rats. Further, to understand the estrogenic activity attributed to TCS at the molecular level, gene-expression profiling of uterus samples was performed from both TCS- or estrogen-treated rats and the genes and cellular processes affected by TCS or estrogen were compared. Data demonstrated that both the genes and cellular processes affected by TCS or estrogen were significantly similar, indicating the possibility that TCS-mediated estrogenic activity occurred at the global transcriptome level. In conclusion, in vitro and gene-profiling results suggested that TCS exhibited estrogenic activity.
Collapse
Affiliation(s)
- Kyung Sik Yoon
- Department of Bio Health Science, College of Natural Science, Changwon National University, Changwon Republic of Korea
| | - Seung Jun Kwack
- Department of Bio Health Science, College of Natural Science, Changwon National University, Changwon Republic of Korea
| |
Collapse
|
7
|
Dong X, He Y, Peng X, Jia X. Triclosan in contact with activated sludge and its impact on phosphate removal and microbial community. BIORESOURCE TECHNOLOGY 2021; 319:124134. [PMID: 32966969 DOI: 10.1016/j.biortech.2020.124134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/09/2020] [Accepted: 09/12/2020] [Indexed: 06/11/2023]
Abstract
Triclosan (TCS) is applied in a wide range of pharmaceutical and personal care products to prevent or reduce bacterial growth. In this study, the effects of TCS on phosphate removal and bacterial community shifts of activated sludge, especially on functional bacteria variation, were investigated. Compared with the control group (R-control), the treatment group (R-TCS) with 100 μg/L TCS inhibited the microbial growth. In addition, the phosphorus removal efficiency of PO43--P and total phosphorus removal rates declined by 15.99% and 7.81%, respectively. Proteobacteria gradually dominated the microorganisms. The growths of Proteobacteria and Bacteroidetes were inhibited when 150 μg/L of TCS was added. Moreover, the differences in the microbial community structures of the R-control and R-TCS groups gradually expanded, no obvious difference was observed in the final stage, and the interrelationships of microbes in the latter weakened. The long-term addition of TCS impairs the growth of polyphosphate-accumulating organisms (PAOs).
Collapse
Affiliation(s)
- Xiaoqi Dong
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Yuzhe He
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China
| | - Xingxing Peng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.
| | - Xiaoshan Jia
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| |
Collapse
|
8
|
Artabe AE, Cunha-Silva H, Barranco A. Enzymatic assays for the assessment of toxic effects of halogenated organic contaminants in water and food. A review. Food Chem Toxicol 2020; 145:111677. [PMID: 32810589 DOI: 10.1016/j.fct.2020.111677] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 06/05/2020] [Accepted: 08/04/2020] [Indexed: 12/11/2022]
Abstract
Halogenated organic compounds are a particular group of contaminants consisting of a large number of substances, and of great concern due to their persistence in the environment, potential for bioaccumulation and toxicity. Some of these compounds have been classified as persistent organic pollutants (POPs) under The Stockholm Convention and many toxicity assessments have been conducted on them previously. In this work we provide an overview of enzymatic assays used in these studies to establish toxic effects and dose-response relationships. Studies in vivo and in vitro have been considered with a particular emphasis on the impact of halogenated compounds on the activity of relevant enzymes to the humans and the environment. Most information available in the literature focuses on chlorinated compounds, but brominated and fluorinated molecules are also the target of increasing numbers of studies. The enzymes identified can be classified as enzymes: i) the activities of which are affected by the presence of halogenated organic compounds, and ii) those involved in their metabolisation/detoxification resulting in increased activities. In both cases the halogen substituent seems to have an important role in the effects observed. Finally, the use of these enzymes in biosensing tools for monitoring of halogenated compounds is described.
Collapse
Affiliation(s)
- Amaia Ereño Artabe
- AZTI, Food Research, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia, Astondo Bidea, Edificio 609, 48160 Derio, Bizkaia, Spain
| | - Hugo Cunha-Silva
- AZTI, Food Research, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia, Astondo Bidea, Edificio 609, 48160 Derio, Bizkaia, Spain
| | - Alejandro Barranco
- AZTI, Food Research, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia, Astondo Bidea, Edificio 609, 48160 Derio, Bizkaia, Spain.
| |
Collapse
|
9
|
Lima CSAD, Varca GHC, Costa SMD, Ferraz HG, Santos ACDS, Lopes PS, Costa SAD. Development of natural polymeric microcapsules for antimicrobial drug delivery: triclosan loaded chitosan and alginate-based microcapsules. Drug Dev Ind Pharm 2020; 46:1477-1486. [PMID: 32783646 DOI: 10.1080/03639045.2020.1809445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The goal of this work was the development of natural polymeric microcapsules for antimicrobial drug delivery - triclosan loaded alginate and chitosan-based microcapsules for potential coating applications in substrates such as textiles or plastics. Microcapsules containing 2.5% (w/w) or 3% (w/w) triclosan in both core and matrix were synthesized and evaluated by Fourier-transform infrared spectroscopy, scanning electron microscopy, confocal microscopy, differential scanning calorimetry, thermogravimetry, and antimicrobial activity. The microcapsules produced featured spherical and mostly irregularly-shaped surfaces composed by an alginate core in a chitosan outer matrix, as revealed by confocal microscopy, and antimicrobial activity against S. aureus and E. coli with inhibition halos up to 60 mm and 25 mm respectively, granted by a triclosan loading of 61.66%. The thermal analysis suggested that the polymers protected the active substance from temperature-induced degradation. In conclusion, these microcapsules may be applied toward antimicrobial functionalization of plastics, textiles and other materials.
Collapse
Affiliation(s)
| | | | | | - Humberto Gomes Ferraz
- Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | | | - Patrícia Santos Lopes
- Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo, Diadema, Brazil
| | | |
Collapse
|
10
|
Bitencourt G, Fortunato ED, Panis C, Amorim EMP, de Arruda Amorim JP. Maternal exposure to triclosan causes fetal development restriction, deregulation of the oestrous cycle, and alters uterine tissue in rat offspring. ENVIRONMENTAL TOXICOLOGY 2019; 34:1105-1113. [PMID: 31240815 DOI: 10.1002/tox.22812] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 06/05/2019] [Accepted: 06/06/2019] [Indexed: 05/20/2023]
Abstract
The aim of the present study was to evaluate the effects of maternal exposure to triclosan (TCS) during pregnancy and lactation on the uterine morphology of rat offspring. For this, 32 Wistar rat dams were distributed into four dose groups (eight mothers per group), and gavage daily, throughout pregnancy and lactation, as follows: Group I-control (GI): corn oil; Group II (GII): TCS diluted in corn oil at a dose of 75 mg/kg/d; Group III (GIII): TCS diluted in corn oil at a dose of 150 mg/kg/d; Group IV (GIV): TCS diluted in corn oil at a dose of 300 mg/kg/d. A female pup of each mother was selected, and at 90 days the pups were euthanized for weighing and collection of the uterus for histomorphometric analysis. The results showed that the mean litter weight was minor in all the groups treated with TCS, when compared with control. The levels thyroid hormones thyroxine (T4) and triiodothyronine (T3) in TCS mother rats were reduced; however the levels of thyroid stimulating hormone (TSH) were increases. The offspring of all groups exposed to TCS presented deregulation of the estrous cycle, compared with control. Analysis of the uterine histological structure demonstrated that all layers of the uterus were affected by the administration of TCS, and the morphometric analysis showed increased uterine layers thickness in the treated groups. We concluded that maternal exposure to TCS during pregnancy and lactation causes intrauterine development restriction, deregulation of the oestrous cycle, and alters uterine tissue in rat offspring.
Collapse
Affiliation(s)
| | | | - Carolina Panis
- State University of Western Parana (UNIOESTE), Cascavel, Paraná, Brazil
| | - Elaine M P Amorim
- State University of Western Parana (UNIOESTE), Cascavel, Paraná, Brazil
| | | |
Collapse
|
11
|
|
12
|
Triclosan: An Update on Biochemical and Molecular Mechanisms. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:1607304. [PMID: 31191794 PMCID: PMC6525925 DOI: 10.1155/2019/1607304] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/28/2019] [Accepted: 04/01/2019] [Indexed: 12/23/2022]
Abstract
Triclosan (TCS) is a synthetic, chlorinated phenolic antimicrobial agent commonly used in commercial and healthcare products. Items made with TCS include soaps, deodorants, shampoos, cosmetics, textiles, plastics, surgical sutures, and prosthetics. A wealth of information obtained from in vitro and in vivo studies has demonstrated the therapeutic effects of TCS, particularly against inflammatory skin conditions. Nevertheless, extensive investigations on the molecular aspects of TCS action have identified numerous adversaries associated with the disinfectant including oxidative injury and influence of physiological lifespan and longevity. This review presents a summary of the biochemical alterations pertaining to TCS exposure, with special emphasis on the diverse molecular pathways responsive to TCS that have been elucidated during the present decade.
Collapse
|
13
|
Montagnini BG, Pernoncine KV, Borges LI, Costa NO, Moreira EG, Anselmo-Franci JA, Kiss ACI, Gerardin DCC. Investigation of the potential effects of triclosan as an endocrine disruptor in female rats: Uterotrophic assay and two-generation study. Toxicology 2018; 410:152-165. [PMID: 30321646 DOI: 10.1016/j.tox.2018.10.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 09/21/2018] [Accepted: 10/11/2018] [Indexed: 12/15/2022]
Abstract
Triclosan (TCS) is a phenolic compound with antimicrobial action widely used in cosmetics and other personal care products and other industry segments. Its widespread use over the decades has made TCS one of the most commonly detected compounds in wastewater and effluent worldwide already being found in human urine, plasma and milk. In this study, the (anti)estrogenicity of TCS was evaluated in the uterotrophic assay in 18-day old female Wistar rats. In a second protocol, female rats were evaluated for the reproductive effects of TCS in a two-generation reproduction toxicity study. Female rats were daily treated by gavage with TCS at the doses of 0.8, 2.4 and 8.0 mg/kg/day or corn oil (control group) over 10 weeks (F0) and over 14 weeks (F1) prior to mating and then throughout mating, gestation and lactation until weaning of F1 and F2 generation respectively. TCS had no effect on the uterus weight in the uterotrophic assay. In the two-generation study, the TCS exposure compromised female sexual behavior, decreased maternal food consumption and increased pup grooming on TCS 2.4 group. The TCS chronic exposure also decreased the perimetrium thickness of F0 females from TCS 8.0 group and growing follicle number of TCS 2.4 females from F1 generation. Despite the some specific changes detected in the two-generation study, no impairment was observed in the uterotrophic assay and other important reproductive endpoints. In a weight of evidence evaluation, the results suggest that exposure to TCS at low doses did not act as an endocrine disruptor in the female rat reproductive system.
Collapse
Affiliation(s)
- Bruno Garcia Montagnini
- Department of Physiological Sciences. State University of Londrina, 86051-980, Londrina, Paraná, Brazil
| | | | - Lorena Ireno Borges
- Department of Physiological Sciences. State University of Londrina, 86051-980, Londrina, Paraná, Brazil
| | - Nathalia Orlandini Costa
- Department of Physiological Sciences. State University of Londrina, 86051-980, Londrina, Paraná, Brazil
| | | | | | - Ana Carolina Inhasz Kiss
- Department of Physiology, Botucatu Biosciences Institute, São Paulo State University, 18618-970 Botucatu, São Paulo, Brazil
| | | |
Collapse
|
14
|
Chen W, Yang X, Wang B, Wang L, Yu X. The effects and possible mechanisms of triclosan on steroidogenesis in primary rat granulosa cells. Reprod Toxicol 2018; 83:28-37. [PMID: 30447264 DOI: 10.1016/j.reprotox.2018.11.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 09/28/2018] [Accepted: 11/09/2018] [Indexed: 10/27/2022]
Abstract
BACKGROUND Triclosan (TCS) has been detected in human tissues. It can disrupt steroidogenesis in vivo. The study on the effects of TCS on ovarian granulosa cells was lacking. METHODS Primary rat granulosa cells (rGCs) were treated with TCS. Concentrations of estradiol (E2), progesterone (P4) in the cell culture supernatants were measured. Microarray was used to measure gene expression profiles. Pathway analysis was performed to identify signaling networks that linked differentially expressed genes (DEGs). Genes related with steroidogenesis were analyzed. RESULTS TCS increased E2 and P4 production. A total of 2006 DEGs were identified. Pathway analysis revealed that ovarian steroidogenesis pathway was upregulated. Both PCR and Western-blot demonstrated that the expressions of key genes involved in this pathway were significantly increased. CONCLUSIONS TCS co-administered with follicle-stimulating hormone (FSH) could increase E2 and P4 production in rGCs and up-regulate ovarian steroidogenesis pathway. StAR and aromatase protein were increased by TCS, while P450scc protein wasn't changed significantly.
Collapse
Affiliation(s)
- Weiwei Chen
- Department of Developmental and Behavioral Pediatrics, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Ministry of Education Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China
| | - Xin Yang
- Department of Developmental and Behavioral Pediatrics, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Ministry of Education Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China
| | - Bin Wang
- Department of Developmental and Behavioral Pediatrics, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Ministry of Education Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China
| | - Lei Wang
- Department of Developmental and Behavioral Pediatrics, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Ministry of Education Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China
| | - Xiaodan Yu
- Department of Developmental and Behavioral Pediatrics, Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Ministry of Education Shanghai Key Laboratory of Children's Environmental Health, Shanghai, China.
| |
Collapse
|
15
|
Xie H, Yang Y, Liu J, Kang Y, Zhang J, Hu Z, Liang S. Enhanced triclosan and nutrient removal performance in vertical up-flow constructed wetlands with manganese oxides. WATER RESEARCH 2018; 143:457-466. [PMID: 29986254 DOI: 10.1016/j.watres.2018.05.061] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 05/09/2018] [Accepted: 05/31/2018] [Indexed: 06/08/2023]
Abstract
Limited concentrations of oxygen in constructed wetlands (CWs) have inhibited their ability to remove emerging organic contaminants (EOCs) at μg/L or ng/L levels. Manganese (Mn) oxides were proposed as a solution, as they are powerful oxidants with strong adsorptive capabilities. In the present study, triclosan (TCS) was selected as a typical EOC, and CW microcosms with Mn oxides (birnessite) coated sand (B-CWs) and without (C-CWs) were developed to test the removal capacities of TCS and common nutrients. We found that the addition of Mn oxides coated sand significantly improved removal efficiencies of TCS, NH4-N, COD, NO3-N and TP (P < 0.05). The average concentration of Mn(II) effluent was 0.036 mg L-1, mostly lower than the drinking water limit. To gain insight into the mechanisms of pollution removal, Mn transformation, dissolved oxygen (DO) distribution, bacterial abundance, and microbial community composition were also investigated. Maximum Mn(II) was detected at 20 cm height of the B-CWs in anoxic zone. Although Mn-oxidizing bacteria existed in the layer of 30-50 cm with 103-104 CFU g-1 dry substate, Mn oxides were only detected at height from 40 to 50 cm with rich oxygen in B-CW. The quantities of bacterial 16S rRNA, amoA, narG and nosZ were not significantly different between two systems (P > 0.05), while Illumina high-throughput sequencing analysis revealed that the abundance of denitrifying bacteria was significant higher in B-CWs, and the abundance of Gammaproteobacteria that have a recognized role in Mn transformation were significantly increased. The results indicated that Mn oxides could enhance TCS and common pollutants removal in both anoxic and aerobic areas through the recycling of Mn between Mn(II) and biogenic Mn oxides.
Collapse
Affiliation(s)
- Huijun Xie
- Environment Research Institute, Shandong University, Jinan 250100, PR China.
| | - Yixiao Yang
- Environment Research Institute, Shandong University, Jinan 250100, PR China
| | - Junhua Liu
- Environment Research Institute, Shandong University, Jinan 250100, PR China
| | - Yan Kang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China
| | - Jian Zhang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China.
| | - Zhen Hu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China
| | - Shuang Liang
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science & Engineering, Shandong University, Jinan 250100, PR China
| |
Collapse
|
16
|
Triclosan Lacks Anti-Estrogenic Effects in Zebrafish Cells but Modulates Estrogen Response in Zebrafish Embryos. Int J Mol Sci 2018; 19:ijms19041175. [PMID: 29649157 PMCID: PMC5979399 DOI: 10.3390/ijms19041175] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/06/2018] [Accepted: 04/10/2018] [Indexed: 11/17/2022] Open
Abstract
Triclosan (TCS), an antimicrobial agent widely found in the aquatic environment, is suspected to act as an endocrine disrupting compound, however mechanistic information is lacking in regards to aquatic species. This study assessed the ability of TCS to interfere with estrogen receptor (ER) transcriptional activity, in zebrafish-specific in vitro and in vivo reporter gene assays. We report that TCS exhibits a lack of either agonistic or antagonistic effects on a panel of ER-expressing zebrafish (ZELH-zfERα and -zfERβ) and human (MELN) cell lines. At the organism level, TCS at concentrations of up to 0.3 µM had no effect on ER-regulated brain aromatase gene expression in transgenic cyp19a1b-GFP zebrafish embryos. At a concentration of 1 µM, TCS interfered with the E2 response in an ambivalent manner by potentializing a low E2 response (0.625 nM), but decreasing a high E2 response (10 nM). Altogether, our study suggests that while modulation of ER-regulated genes by TCS may occur in zebrafish, it does so irrespective of a direct binding and activation of zfERs.
Collapse
|
17
|
Mughal BB, Fini JB, Demeneix BA. Thyroid-disrupting chemicals and brain development: an update. Endocr Connect 2018; 7:R160-R186. [PMID: 29572405 PMCID: PMC5890081 DOI: 10.1530/ec-18-0029] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 03/14/2018] [Indexed: 12/12/2022]
Abstract
This review covers recent findings on the main categories of thyroid hormone-disrupting chemicals and their effects on brain development. We draw mostly on epidemiological and experimental data published in the last decade. For each chemical class considered, we deal with not only the thyroid hormone-disrupting effects but also briefly mention the main mechanisms by which the same chemicals could modify estrogen and/or androgen signalling, thereby exacerbating adverse effects on endocrine-dependent developmental programmes. Further, we emphasize recent data showing how maternal thyroid hormone signalling during early pregnancy affects not only offspring IQ, but also neurodevelopmental disease risk. These recent findings add to established knowledge on the crucial importance of iodine and thyroid hormone for optimal brain development. We propose that prenatal exposure to mixtures of thyroid hormone-disrupting chemicals provides a plausible biological mechanism contributing to current increases in the incidence of neurodevelopmental disease and IQ loss.
Collapse
Affiliation(s)
- Bilal B Mughal
- CNRS/UMR7221Muséum National d'Histoire Naturelle, Sorbonne Universités, Paris, France
| | - Jean-Baptiste Fini
- CNRS/UMR7221Muséum National d'Histoire Naturelle, Sorbonne Universités, Paris, France
| | - Barbara A Demeneix
- CNRS/UMR7221Muséum National d'Histoire Naturelle, Sorbonne Universités, Paris, France
| |
Collapse
|
18
|
Farmer WT, Louis GW, Buckalew AR, Hallinger DR, Stoker TE. Evaluation of triclosan in the Hershberger and H295R steroidogenesis assays. Toxicol Lett 2018; 291:194-199. [PMID: 29501854 DOI: 10.1016/j.toxlet.2018.03.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 01/25/2018] [Accepted: 03/01/2018] [Indexed: 10/17/2022]
Abstract
Triclosan (TCS) is an antibacterial widely used in personal care products that exhibits endocrine disrupting activity in several species, with reports of altered thyroid, estrogen and androgen signaling pathways. To evaluate the androgenic mode of action, TCS was evaluated for androgen receptor mediated effects in the Hershberger assay and for altered androgen synthesis in the H295R steroidogenesis assay. In the Hershberger assay, castrated males were dosed by oral gavage for 10 days with corn oil (vehicle) or TCS (50 or 200 mg/kg/day) in the presence or absence of testosterone proprionate (TP, 0.2 mg/kg/day) prior to assessing accessory sex tissues (ASTs) weights. TCS alone or in combination with TP did not alter androgen dependent AST weights. Assessment of serum thyroxine (T4) demonstrated a significant dose-dependent decrease by TCS (50 or 200 mg/kg/day) co-administered with TP and TCS (200 mg/kg) without TP, but no differences in liver or thyroid weights. In the H295R assay, TCS from 0.01 to 10 μM had no effect on testosterone production but TCS at 3 μM and above did induce a significant increase in estrogen production. At 10 μM, TCS produced significant cytotoxicity which confounded the interpretation of the estrogenic effect at that concentration. Thus, TCS had no effect on androgen synthesis or activity in the models used, but did enhance estrogen production and suppress serum T4.
Collapse
Affiliation(s)
- W T Farmer
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, NC 27711, USA; Oak Ridge Institute for Science and Education, United States Department of Energy, Oak Ridge, TN 37831, USA
| | - G W Louis
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, NC 27711, USA; Oak Ridge Institute for Science and Education, United States Department of Energy, Oak Ridge, TN 37831, USA
| | - A R Buckalew
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - D R Hallinger
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, NC 27711, USA
| | - T E Stoker
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, United States Environmental Protection Agency, Research Triangle Park, NC 27711, USA.
| |
Collapse
|
19
|
Cao XY, Hua X, Xiong JW, Zhu WT, Zhang J, Chen L. Impact of Triclosan on Female Reproduction through Reducing Thyroid Hormones to Suppress Hypothalamic Kisspeptin Neurons in Mice. Front Mol Neurosci 2018; 11:6. [PMID: 29403355 PMCID: PMC5780345 DOI: 10.3389/fnmol.2018.00006] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 01/04/2018] [Indexed: 12/27/2022] Open
Abstract
Triclosan (TCS), a broad-spectrum antimicrobial agent, is widely used in clinical settings and various personal care products. The aim of this study was to evaluate the influence of TCS on reproductive endocrine and function. Here, we show that the exposure of adult female mice to 10 or 100 mg/kg/day TCS caused prolongation of diestrus, and decreases in antral follicles and corpora lutea within 2 weeks. TCS mice showed decreases in the levels of serum luteinizing hormone (LH), follicle-stimulating hormone (FSH) and progesterone, and gonadotrophin-releasing hormone (GnRH) mRNA with the lack of LH surge and elevation of prolactin (PRL). TCS mice had lower kisspeptin immunoreactivity and kiss1 mRNA in anteroventral periventricular nucleus (AVPV) and arcuate nucleus (ARC). Moreover, the estrogen (E2)-enhanced AVPV-kisspeptin expression was reduced in TCS mice. In addition, the serum thyroid hormones (triiodothyronine (T3) and thyroxine (T4)) in TCS mice were reduced with increases in levels of thyroid stimulating hormone (TSH) and thyroid releasing hormone (TRH). In TCS mice, the treatment with Levothyroxine (L-T4) corrected the increases in PRL, TSH and TRH; the administration of L-T4 or type-2 dopamine receptors agonist quinpirole inhibiting PRL release could rescue the decline of kisspeptin expression in AVPV and ARC; the treatment with L-T4, quinpirole or the GPR45 agonist kisspeptin-10 recovered the levels of serum LH and FSH and progesterone, and GnRH mRNA. Furthermore, TCS mice treated with L-T4 or quinpirole resumed regular estrous cycling, follicular development and ovulation. Together, these results indicate that exposing adult female mice to TCS (≥10 mg/kg) reduces thyroid hormones causing hyperprolactinemia that then suppresses hypothalamic kisspeptin expression, leading to deficits in reproductive endocrine and function.
Collapse
Affiliation(s)
- Xin-Yuan Cao
- State Key Lab of Reproductive Medicine, Nanjing Medical University, Nanjing, China.,Department of Physiology, Nanjing Medical University, Nanjing, China
| | - Xu Hua
- Department of Physiology, Nanjing Medical University, Nanjing, China
| | - Jian-Wei Xiong
- Department of Physiology, Nanjing Medical University, Nanjing, China
| | - Wen-Ting Zhu
- MOE and Shanghai Key Laboratory of Children's Environment Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jun Zhang
- MOE and Shanghai Key Laboratory of Children's Environment Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ling Chen
- State Key Lab of Reproductive Medicine, Nanjing Medical University, Nanjing, China.,Department of Physiology, Nanjing Medical University, Nanjing, China
| |
Collapse
|
20
|
Craig ZR, Ziv-Gal A. Pretty Good or Pretty Bad? The Ovary and Chemicals in Personal Care Products. Toxicol Sci 2017; 162:349-360. [DOI: 10.1093/toxsci/kfx285] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Zelieann R Craig
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, Arizona
| | - Ayelet Ziv-Gal
- College of Health/School of Health Sciences, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand
| |
Collapse
|
21
|
Halden RU, Lindeman AE, Aiello AE, Andrews D, Arnold WA, Fair P, Fuoco RE, Geer LA, Johnson PI, Lohmann R, McNeill K, Sacks VP, Schettler T, Weber R, Zoeller RT, Blum A. The Florence Statement on Triclosan and Triclocarban. ENVIRONMENTAL HEALTH PERSPECTIVES 2017; 125:064501. [PMID: 28632490 PMCID: PMC5644973 DOI: 10.1289/ehp1788] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/06/2017] [Accepted: 04/08/2017] [Indexed: 05/20/2023]
Abstract
The Florence Statement on Triclosan and Triclocarban documents a consensus of more than 200 scientists and medical professionals on the hazards of and lack of demonstrated benefit from common uses of triclosan and triclocarban. These chemicals may be used in thousands of personal care and consumer products as well as in building materials. Based on extensive peer-reviewed research, this statement concludes that triclosan and triclocarban are environmentally persistent endocrine disruptors that bioaccumulate in and are toxic to aquatic and other organisms. Evidence of other hazards to humans and ecosystems from triclosan and triclocarban is presented along with recommendations intended to prevent future harm from triclosan, triclocarban, and antimicrobial substances with similar properties and effects. Because antimicrobials can have unintended adverse health and environmental impacts, they should only be used when they provide an evidence-based health benefit. Greater transparency is needed in product formulations, and before an antimicrobial is incorporated into a product, the long-term health and ecological impacts should be evaluated. https://doi.org/10.1289/EHP1788.
Collapse
Affiliation(s)
- Rolf U Halden
- Biodesign Center for Environmental Security, Arizona State University , Tempe, Arizona, USA
| | | | - Allison E Aiello
- Department of Epidemiology, UNC Gillings School of Global Public Health, University of North Carolina , Chapel Hill, North Carolina, USA
| | - David Andrews
- Environmental Working Group, Washington, District of Columbia, USA
| | - William A Arnold
- Department of Civil, Environmental, and Geo-Engineering, University of Minnesota , Minneapolis, Minnesota, USA
| | - Patricia Fair
- Medical University of South Carolina , Department of Public Health Sciences, Charleston, South Carolina, USA
| | - Rebecca E Fuoco
- Health Research Communication Strategies , Los Angeles, California, USA
| | - Laura A Geer
- Department of Environmental and Occupational Health Sciences, State University of New York, Downstate School of Public Health , Brooklyn, New York, USA
| | - Paula I Johnson
- California Safe Cosmetics Program, California Department of Public Health , Richmond, California, USA
| | - Rainer Lohmann
- University of Rhode Island Graduate School of Oceanography , Narragansett, Rhode Island, USA
| | - Kristopher McNeill
- Institute for Biogeochemistry and Pollutant Dynamics , ETH Zurich, Zurich, Switzerland
| | | | - Ted Schettler
- Science and Environmental Health Network, Ames, Iowa, USA
| | - Roland Weber
- POPs Environmental Consulting, Schwäbisch Gmünd, Germany
| | - R Thomas Zoeller
- University of Massachusetts Amherst , Amherst, Massachusetts, USA
| | - Arlene Blum
- Department of Chemistry, University of California at Berkeley , Berkeley, California, USA
| |
Collapse
|
22
|
Prichystalova R, Fini JB, Trasande L, Bellanger M, Demeneix B, Maxim L. Comparison of methods for calculating the health costs of endocrine disrupters: a case study on triclosan. Environ Health 2017; 16:55. [PMID: 28599657 PMCID: PMC5466740 DOI: 10.1186/s12940-017-0265-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 05/26/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Socioeconomic analysis is currently used in the Europe Union as part of the regulatory process in Regulation Registration, Evaluation and Authorisation of Chemicals (REACH), with the aim of assessing and managing risks from dangerous chemicals. The political impact of the socio-economic analysis is potentially high in the authorisation and restriction procedures, however, current socio-economic analysis dossiers submitted under REACH are very heterogeneous in terms of methodology used and quality. Furthermore, the economic literature is not very helpful for regulatory purposes, as most published calculations of health costs associated with chemical exposures use epidemiological studies as input data, but such studies are rarely available for most substances. The quasi-totality of the data used in the REACH dossiers comes from toxicological studies. METHODS This paper assesses the use of the integrated probabilistic risk assessment, based on toxicological data, for the calculation of health costs associated with endocrine disrupting effects of triclosan. The results are compared with those obtained using the population attributable fraction, based on epidemiological data. RESULTS The results based on the integrated probabilistic risk assessment indicated that 4894 men could have reproductive deficits based on the decreased vas deferens weights observed in rats, 0 cases of changed T3 levels, and 0 cases of girls with early pubertal development. The results obtained with the Population Attributable Fraction method showed 7,199,228 cases of obesity per year, 281,923 girls per year with early pubertal development and 88,957 to 303,759 cases per year with increased total T3 hormone levels. The economic costs associated with increased BMI due to TCS exposure could be calculated. Direct health costs were estimated at €5.8 billion per year. CONCLUSIONS The two methods give very different results for the same effects. The choice of a toxicological-based or an epidemiological-based method in the socio-economic analysis will therefore significantly impact the estimated health costs and consequently the political risk management decision. Additional work should be done for understanding the reasons of these significant differences.
Collapse
Affiliation(s)
- Radka Prichystalova
- Institut des Sciences de la Communication (UMS 3665), CNRS (Centre National de la Recherche Scientifique)/Université Paris Sorbonne/UPMC (Université Pierre et Marie Curie), 20 rue Berbier du Mets, 75013 Paris, France
| | - Jean-Baptiste Fini
- Sorbonne Universités, CNRS UMR 7221, RDDM, Muséum d’Histoire Naturelle, F-75005 Paris, France
| | - Leonardo Trasande
- Department of Pediatrics, NYU School of Medicine, 403 E 34th St, New York, NY 10016 USA
| | - Martine Bellanger
- School of Public Health, University Sorbonne Paris Cité, EA7348 MOS, Paris, France
| | - Barbara Demeneix
- Sorbonne Universités, CNRS UMR 7221, RDDM, Muséum d’Histoire Naturelle, F-75005 Paris, France
| | - Laura Maxim
- Institut des Sciences de la Communication (UMS 3665), CNRS (Centre National de la Recherche Scientifique)/Université Paris Sorbonne/UPMC (Université Pierre et Marie Curie), 20 rue Berbier du Mets, 75013 Paris, France
| |
Collapse
|
23
|
Teplova VV, Belosludtsev KN, Kruglov AG. Mechanism of triclosan toxicity: Mitochondrial dysfunction including complex II inhibition, superoxide release and uncoupling of oxidative phosphorylation. Toxicol Lett 2017; 275:108-117. [DOI: 10.1016/j.toxlet.2017.05.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 04/25/2017] [Accepted: 05/03/2017] [Indexed: 01/15/2023]
|
24
|
Mihaich E, Capdevielle M, Urbach-Ross D, Slezak B. Hypothesis-driven weight-of-evidence analysis of endocrine disruption potential: a case study with triclosan. Crit Rev Toxicol 2017; 47:263-285. [DOI: 10.1080/10408444.2016.1269722] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Ellen Mihaich
- Environmental and Regulatory Resources, LLC, Durham, NC, USA
| | | | | | | |
Collapse
|
25
|
Louis GW, Hallinger DR, Braxton MJ, Kamel A, Stoker TE. Effects of chronic exposure to triclosan on reproductive and thyroid endpoints in the adult Wistar female rat. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 80:236-249. [PMID: 28569618 PMCID: PMC5994608 DOI: 10.1080/15287394.2017.1287029] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Triclosan (TCS), an antibacterial, has been shown to be an endocrine disruptor in the rat. Previously, subchronic TCS treatment to female rats was found to advance puberty and potentiate the effect of ethinyl estradiol (EE) on uterine growth when EE and TCS were co-administered prior to weaning. In the pubertal study, a decrease in serum thyroxine (T4) concentrations with no significant change in serum thyroid-stimulating hormone (TSH) was also observed. The purpose of the present study was to further characterize the influence of TCS on the reproductive and thyroid axes of the female rat using a chronic exposure regimen. Female Wistar rats were exposed by oral gavage to vehicle control, EE (1 μg/kg), or TCS (2.35, 4.69, 9.375 or 37.5 mg/kg) for 8 months and estrous cyclicity monitored. Although a divergent pattern of reproductive senescence appeared to emerge from 5 to 11 months of age between controls and EE-treated females, no significant difference in cyclicity was noted between TCS-treated and control females. A higher % control females displayed persistent diestrus (PD) by the end of the study, whereas animals administered with positive control (EE) were predominately persistent estrus (PE). Thyroxine concentration was significantly decreased in TCS-administered 9.375 and 37.5 mg/kg groups, with no marked effects on TSH levels, thyroid tissue weight, or histology. Results demonstrate that a long-term exposure to TCS did not significantly alter estrous cyclicity or timing of reproductive senescence in females but suppressed T4 levels at a lower dose than previously observed.
Collapse
Affiliation(s)
- Gwendolyn W. Louis
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. EPA, Research Triangle Park, NC, USA
- Oak Ridge Institute for Science and Education (ORISE), US Department of Energy, Oak Ridge, TN, USA
| | - Daniel R. Hallinger
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. EPA, Research Triangle Park, NC, USA
| | - M. Janay Braxton
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. EPA, Research Triangle Park, NC, USA
| | - Alaa Kamel
- Analytical Chemistry Branch, Biological and Economic Analysis Division, Office of Pesticide Programs, U.S. EPA, Fort Meade, MD, USA
| | - Tammy E. Stoker
- Endocrine Toxicology Branch, Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. EPA, Research Triangle Park, NC, USA
| |
Collapse
|
26
|
Huang CL, Abass OK, Yu CP. Triclosan: A review on systematic risk assessment and control from the perspective of substance flow analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 566-567:771-785. [PMID: 27239720 DOI: 10.1016/j.scitotenv.2016.05.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 05/01/2016] [Accepted: 05/02/2016] [Indexed: 05/27/2023]
Abstract
Triclosan (TCS) is a broad spectrum antibacterial agent mainly used in Pharmaceutical and Personal Care Products. Its increasing use over recent decades have raised its concentration in the environment, with commonly detectable levels found along the food web-from aquatic organisms to humans in the ecosystem. To date, there is shortage of information on how to investigate TCS's systematic risk on exposed organisms including humans, due to the paucity of systematic information on TCS flows in the anthroposphere. Therefore, a more holistic approach to mass flow balancing is required, such that the systematic risk of TCS in all environmental matrices are evaluated. From the perspective of Substance Flow Analysis (SFA), this review critically summarizes the current state of knowledge on TCS production, consumption, discharge, occurrence in built and natural environments, its exposure and metabolism in humans, and also the negative effects of TCS on biota and humans. Recent risk concerns have mainly focused on TCS removal efficiencies and metabolism, but less attention is given to the effect of mass flows from source to fate during risk exposure. However, available data for TCS SFA is limited but SFA can derive logical systematic information from limited data currently available for systematic risk assessment and reduction, based on mass flow analysis. In other words, SFA tool can be used to develop a comprehensive flow chart and indicator system for the risk assessment and reduction of TCS flows in the anthroposphere, thereby bridging knowledge gaps to streamline uncertainties related to policy-making on exposure pathways within TCS flow-lines. In the final analysis, specifics on systematic TCS risk assessment via SFA, and areas of improvement on human adaptation to risks posed by emerging contaminants are identified and directions for future research are suggested.
Collapse
Affiliation(s)
- Chu-Long Huang
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799, Jimei Road, Xiamen 361021, China; Department of Resources and Environmental Sciences, Quanzhou Normal University, 398, Donghai Street, Quanzhou 362000, China; Xiamen Key Lab of Urban Metabolism, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Olusegun K Abass
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799, Jimei Road, Xiamen 361021, China
| | - Chang-Ping Yu
- Key Lab of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799, Jimei Road, Xiamen 361021, China; Graduate Institute of Environmental Engineering, National Taiwan University, 71, Chou-Shan Road, Taipei 106, Taiwan.
| |
Collapse
|
27
|
Pollock T, Greville LJ, Tang B, deCatanzaro D. Triclosan elevates estradiol levels in serum and tissues of cycling and peri-implantation female mice. Reprod Toxicol 2016; 65:394-401. [PMID: 27638325 DOI: 10.1016/j.reprotox.2016.09.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 08/17/2016] [Accepted: 09/09/2016] [Indexed: 12/24/2022]
Abstract
Triclosan, an antimicrobial agent added to personal care products, can modulate estrogenic actions. We investigated whether triclosan affects concentrations of exogenous and endogenous estradiol. Female mice were given injections of triclosan followed by 1μCi tritium-labeled estradiol. Mice given daily 2-mg triclosan doses (57.9mg/kg/dose) showed significantly elevated radioactivity in tissues and serum compared to controls. A single dose of 1 or 2mg triclosan increased radioactivity in the uterus in both cycling and peri-implantation females. We also measured natural urinary estradiol at 2-12h following triclosan injection. Unconjugated estradiol was significantly elevated for several hours following 1 or 2mg of triclosan. These data are consistent with evidence that triclosan inhibits sulfonation of estrogens by interacting with sulfotransferases, preventing metabolism of these steroids into biologically inactive forms. Elevation of estrogen concentrations by triclosan is potentially relevant to anti-reproductive and carcinogenic actions of excessive estrogen activity.
Collapse
Affiliation(s)
- Tyler Pollock
- Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario L8S 4K1, Canada
| | - Lucas J Greville
- Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario L8S 4K1, Canada
| | - Brandon Tang
- Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario L8S 4K1, Canada
| | - Denys deCatanzaro
- Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario L8S 4K1, Canada.
| |
Collapse
|
28
|
Verslycke T, Mayfield DB, Tabony JA, Capdevielle M, Slezak B. Human health risk assessment of triclosan in land-applied biosolids. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2016; 35:2358-2367. [PMID: 27552397 DOI: 10.1002/etc.3370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 11/24/2015] [Accepted: 01/08/2016] [Indexed: 06/06/2023]
Abstract
Triclosan (5-chloro-2-[2,4-dichlorophenoxy]-phenol) is an antimicrobial agent found in a variety of pharmaceutical and personal care products. Numerous studies have examined the occurrence and environmental fate of triclosan in wastewater, biosolids, biosolids-amended soils, and plants and organisms exposed to biosolid-amended soils. Triclosan has a propensity to adhere to organic carbon in biosolids and biosolid-amended soils. Land application of biosolids containing triclosan has the potential to contribute to multiple direct and indirect human health exposure pathways. To estimate exposures and human health risks from biosolid-borne triclosan, a risk assessment was conducted in general accordance with the methodology incorporated into the US Environmental Protection Agency's Part 503 biosolids rule. Human health exposures to biosolid-borne triclosan were estimated on the basis of published empirical data or modeled using upper-end environmental partitioning estimates. Similarly, a range of published triclosan human health toxicity values was evaluated. Margins of safety were estimated for 10 direct and indirect exposure pathways, both individually and combined. The present risk assessment found large margins of safety (>1000 to >100 000) for potential exposures to all pathways, even under the most conservative exposure and toxicity assumptions considered. The human health exposures and risks from biosolid-borne triclosan are concluded to be de minimis. Environ Toxicol Chem 2016;35:2358-2367. © 2016 SETAC.
Collapse
Affiliation(s)
| | | | | | | | - Brian Slezak
- Colgate-Palmolive Company, Piscataway, New Jersey, USA
| |
Collapse
|
29
|
Haggard DE, Noyes PD, Waters KM, Tanguay RL. Phenotypically anchored transcriptome profiling of developmental exposure to the antimicrobial agent, triclosan, reveals hepatotoxicity in embryonic zebrafish. Toxicol Appl Pharmacol 2016; 308:32-45. [PMID: 27538710 DOI: 10.1016/j.taap.2016.08.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 07/17/2016] [Accepted: 08/12/2016] [Indexed: 02/08/2023]
Abstract
Triclosan (TCS) is an antimicrobial agent commonly found in a variety of personal care products and cosmetics. TCS readily enters the environment through wastewater and is detected in human plasma, urine, and breast milk due to its widespread use. Studies have implicated TCS as a disruptor of thyroid and estrogen signaling; therefore, research examining the developmental effects of TCS is warranted. In this study, we used embryonic zebrafish to investigate the developmental toxicity and potential mechanism of action of TCS. Embryos were exposed to graded concentrations of TCS from 6 to 120hours post-fertilization (hpf) and the concentration where 80% of the animals had mortality or morbidity at 120hpf (EC80) was calculated. Transcriptomic profiling was conducted on embryos exposed to the EC80 (7.37μM). We identified a total of 922 significant differentially expressed transcripts (FDR adjusted P-value≤0.05; fold change ≥2). Pathway and gene ontology enrichment analyses identified biological networks and transcriptional hubs involving normal liver functioning, suggesting TCS may be hepatotoxic in zebrafish. Tissue-specific gene enrichment analysis further supported the role of the liver as a target organ for TCS toxicity. We also examined the in vitro bioactivity profile of TCS reported by the ToxCast screening program. TCS had a diverse bioactivity profile and was a hit in 217 of the 385 assay endpoints we identified. We observed similarities in gene expression and hepatic steatosis assays; however, hit data for TCS were more concordant with the hypothesized CAR/PXR activity of TCS from rodent and human in vitro studies.
Collapse
Affiliation(s)
- Derik E Haggard
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR, United States
| | - Pamela D Noyes
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR, United States; Office of Science Coordination and Policy (OSCP), Office of Chemical Safety and Pollution Prevention, U.S. Environmental Protection Agency, Washington, DC, United States
| | - Katrina M Waters
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, United States
| | - Robert L Tanguay
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, OR, United States.
| |
Collapse
|
30
|
Feng Y, Zhang P, Zhang Z, Shi J, Jiao Z, Shao B. Endocrine Disrupting Effects of Triclosan on the Placenta in Pregnant Rats. PLoS One 2016; 11:e0154758. [PMID: 27149376 PMCID: PMC4858197 DOI: 10.1371/journal.pone.0154758] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 04/19/2016] [Indexed: 01/17/2023] Open
Abstract
Triclosan (TCS) is a broad-spectrum antimicrobial agent that is frequently used in pharmaceuticals and personal care products. Reports have shown that TCS is a potential endocrine disruptor; however, the potential effects of TCS on placental endocrine function are unclear. The aim of this study was to investigate the endocrine disrupting effects of TCS on the placenta in pregnant rats. Pregnant rats from gestational day (GD) 6 to GD 20 were treated with 0, 30, 100, 300 and 600 mg/kg/d TCS followed by analysis of various biochemical parameters. Of the seven tissues examined, the greatest bioaccumulation of TCS was observed in the placenta. Reduction of gravid uterine weight and the occurrence of abortion were observed in the 600 mg/kg/d TCS-exposed group. Moreover, hormone detection demonstrated that the serum levels of progesterone (P), estradiol (E2), testosterone (T), human chorionic gonadotropin (hCG) and prolactin (PRL) were decreased in groups exposed to higher doses of TCS. Real-time quantitative reverse transcriptase-polymerase chain reaction (Q-RT-PCR) analysis revealed a significant increase in mRNA levels for placental steroid metabolism enzymes, including UDP-glucuronosyltransferase 1A1 (UGT1A1), estrogen sulfotransferase 1E1 (SULT1E1), steroid 5α-reductase 1 (SRD5A1) and steroid 5α-reductase 2 (SRD5A2). Furthermore, the transcriptional expression levels of progesterone receptor (PR), estrogen receptor (ERα) and androgen receptor (AR) were up-regulated. Taken together, these data demonstrated that the placenta was a target tissue of TCS and that TCS induced inhibition of circulating steroid hormone production might be related to the altered expression of hormone metabolism enzyme genes in the placenta. This hormone disruption might subsequently affect fetal development and growth.
Collapse
Affiliation(s)
- Yixing Feng
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Control and Prevention, Beijing, China
| | - Pin Zhang
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Control and Prevention, Beijing, China
| | - Zhaobin Zhang
- College of Urban and Environmental Sciences, MOE Laboratory for Earth Surface Processes, Peking University, Beijing, China
| | - Jiachen Shi
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Control and Prevention, Beijing, China
| | - Zhihao Jiao
- Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Control and Prevention, Beijing, China
| | - Bing Shao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Veterinary Medicine, China Agricultural University, Beijing, China
- * E-mail:
| |
Collapse
|
31
|
Abstract
PURPOSE OF REVIEW Consumer products are often overlooked as sources of children's exposures to toxic chemicals. Various regulatory bodies have developed lists of chemicals of concern that can be found in products contacted by children. However, this information has not been summarized for health practitioners. This review organizes such chemicals and products into four categories, with the antibacterial agent triclosan used to illustrate the potential risks to children from a common ingredient in consumer products. RECENT FINDINGS Biomonitoring, house dust, indoor air, and product testing document children's exposures to a wide variety of chemicals. An increasing number of epidemiology studies have shown associations between these exposures and health effects in children. Triclosan is an example of a chemical contained in high contact products (e.g., soaps, lotions, and toothpaste) not necessarily designed for children. Triclosan exposure in children has been associated with increased responsiveness to airway allergens, with it also capable of endocrine disruption. However, the utility and necessity of this chemical in consumer products has not been demonstrated in most cases. SUMMARY Triclosan and the other examples provided show that a changing marketplace with little regulatory oversight of chemical uses can lead to unanticipated exposures and potential health risks to children.
Collapse
|
32
|
Environmental Exposure to Triclosan and Semen Quality. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:224. [PMID: 26901211 PMCID: PMC4772244 DOI: 10.3390/ijerph13020224] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 01/22/2016] [Accepted: 02/04/2016] [Indexed: 01/03/2023]
Abstract
Triclosan (2,4,4′-trichloro-2′-hydroxy-diphenyl ether, TCS) is widely used in personal care, household, veterinary and industrial products. It was considered as a potential male reproductive toxicant in previous in vitro and in vivo studies. However, evidence from human studies is scarce. Our study aims to investigate the relationship between TCS exposure and semen quality. We measured urinary TCS concentrations in 471 men recruited from a male reproductive health clinic. TCS was detected in 96.7% of urine samples, with a median concentration of 0.97 ng (mg·creatinine)−1 (interquartile range, 0.41–2.95 ng (mg·creatinine)−1). A multiple linear regression analysis showed a negative association between natural logarithm (Ln) transformed TCS concentration (Ln-TCS) and Ln transformed number of forward moving sperms (adjusted coefficient β = −0.17; 95% confidence interval (CI) (−0.32, −0.02). Furthermore, among those with the lowest tertile of TCS level, Ln-TCS was negatively associated with the number of forward moving sperms (β = −0.35; 95% CI (−0.68, −0.03)), percentage of sperms with normal morphology (β = −1.64; 95% CI (−3.05, −0.23)), as well as number of normal morphological sperms, sperm concentration and count. Our findings suggest that the adverse effect of TCS on semen quality is modest at the environment-relevant dose in humans. Further studies are needed to confirm our findings.
Collapse
|
33
|
Green Tea Catechin, EGCG, Suppresses PCB 102-Induced Proliferation in Estrogen-Sensitive Breast Cancer Cells. Int J Breast Cancer 2015; 2015:163591. [PMID: 26783468 PMCID: PMC4691479 DOI: 10.1155/2015/163591] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 11/19/2015] [Accepted: 11/23/2015] [Indexed: 02/08/2023] Open
Abstract
The persistence of polychlorinated biphenyls (PCBs) in the environment is of considerable concern since they accumulate in human breast tissue and may stimulate the growth of estrogen-sensitive tumors. Studies have shown that EGCG from green tea can modify estrogenic activity and thus may act as a cancer chemopreventive agent. In the present study, we evaluated the individual and combined effects of PCB 102 and EGCG on cell proliferation using an estrogen-sensitive breast cancer cell line MCF-7/BOS. PCB 102 (1-10 μM) increased cell proliferation in a dose-dependent manner. Furthermore, the proliferative effects of PCB 102 were mediated by ERα and could be abrogated by the selective ERα antagonist MPP. EGCG (10-50 μM) caused a dose-dependent inhibition of PCB 102-induced cell proliferation, with nearly complete inhibition at 25 μM EGCG. The antiproliferative action of EGCG was mediated by ERβ and could be blocked by the ERβ-specific inhibitor PHTPP. In conclusion, EGCG suppressed the proliferation-stimulating activity of the environmental estrogen PCB 102 which may be helpful in the chemoprevention of breast cancer.
Collapse
|
34
|
Gore AC, Chappell VA, Fenton SE, Flaws JA, Nadal A, Prins GS, Toppari J, Zoeller RT. EDC-2: The Endocrine Society's Second Scientific Statement on Endocrine-Disrupting Chemicals. Endocr Rev 2015; 36:E1-E150. [PMID: 26544531 PMCID: PMC4702494 DOI: 10.1210/er.2015-1010] [Citation(s) in RCA: 1262] [Impact Index Per Article: 140.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 09/01/2015] [Indexed: 02/06/2023]
Abstract
The Endocrine Society's first Scientific Statement in 2009 provided a wake-up call to the scientific community about how environmental endocrine-disrupting chemicals (EDCs) affect health and disease. Five years later, a substantially larger body of literature has solidified our understanding of plausible mechanisms underlying EDC actions and how exposures in animals and humans-especially during development-may lay the foundations for disease later in life. At this point in history, we have much stronger knowledge about how EDCs alter gene-environment interactions via physiological, cellular, molecular, and epigenetic changes, thereby producing effects in exposed individuals as well as their descendants. Causal links between exposure and manifestation of disease are substantiated by experimental animal models and are consistent with correlative epidemiological data in humans. There are several caveats because differences in how experimental animal work is conducted can lead to difficulties in drawing broad conclusions, and we must continue to be cautious about inferring causality in humans. In this second Scientific Statement, we reviewed the literature on a subset of topics for which the translational evidence is strongest: 1) obesity and diabetes; 2) female reproduction; 3) male reproduction; 4) hormone-sensitive cancers in females; 5) prostate; 6) thyroid; and 7) neurodevelopment and neuroendocrine systems. Our inclusion criteria for studies were those conducted predominantly in the past 5 years deemed to be of high quality based on appropriate negative and positive control groups or populations, adequate sample size and experimental design, and mammalian animal studies with exposure levels in a range that was relevant to humans. We also focused on studies using the developmental origins of health and disease model. No report was excluded based on a positive or negative effect of the EDC exposure. The bulk of the results across the board strengthen the evidence for endocrine health-related actions of EDCs. Based on this much more complete understanding of the endocrine principles by which EDCs act, including nonmonotonic dose-responses, low-dose effects, and developmental vulnerability, these findings can be much better translated to human health. Armed with this information, researchers, physicians, and other healthcare providers can guide regulators and policymakers as they make responsible decisions.
Collapse
Affiliation(s)
- A C Gore
- Pharmacology and Toxicology (A.C.G.), College of Pharmacy, The University of Texas at Austin, Austin, Texas 78734; Division of the National Toxicology Program (V.A.C., S.E.F.), National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709; Department of Comparative Biosciences (J.A.F.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802; Institute of Bioengineering and CIBERDEM (A.N.), Miguel Hernandez University of Elche, 03202 Elche, Alicante, Spain; Departments of Urology, Pathology, and Physiology & Biophysics (G.S.P.), College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612; Departments of Physiology and Pediatrics (J.T.), University of Turku and Turku University Hospital, 20520 Turku, Finland; and Biology Department (R.T.Z.), University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - V A Chappell
- Pharmacology and Toxicology (A.C.G.), College of Pharmacy, The University of Texas at Austin, Austin, Texas 78734; Division of the National Toxicology Program (V.A.C., S.E.F.), National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709; Department of Comparative Biosciences (J.A.F.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802; Institute of Bioengineering and CIBERDEM (A.N.), Miguel Hernandez University of Elche, 03202 Elche, Alicante, Spain; Departments of Urology, Pathology, and Physiology & Biophysics (G.S.P.), College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612; Departments of Physiology and Pediatrics (J.T.), University of Turku and Turku University Hospital, 20520 Turku, Finland; and Biology Department (R.T.Z.), University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - S E Fenton
- Pharmacology and Toxicology (A.C.G.), College of Pharmacy, The University of Texas at Austin, Austin, Texas 78734; Division of the National Toxicology Program (V.A.C., S.E.F.), National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709; Department of Comparative Biosciences (J.A.F.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802; Institute of Bioengineering and CIBERDEM (A.N.), Miguel Hernandez University of Elche, 03202 Elche, Alicante, Spain; Departments of Urology, Pathology, and Physiology & Biophysics (G.S.P.), College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612; Departments of Physiology and Pediatrics (J.T.), University of Turku and Turku University Hospital, 20520 Turku, Finland; and Biology Department (R.T.Z.), University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - J A Flaws
- Pharmacology and Toxicology (A.C.G.), College of Pharmacy, The University of Texas at Austin, Austin, Texas 78734; Division of the National Toxicology Program (V.A.C., S.E.F.), National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709; Department of Comparative Biosciences (J.A.F.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802; Institute of Bioengineering and CIBERDEM (A.N.), Miguel Hernandez University of Elche, 03202 Elche, Alicante, Spain; Departments of Urology, Pathology, and Physiology & Biophysics (G.S.P.), College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612; Departments of Physiology and Pediatrics (J.T.), University of Turku and Turku University Hospital, 20520 Turku, Finland; and Biology Department (R.T.Z.), University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - A Nadal
- Pharmacology and Toxicology (A.C.G.), College of Pharmacy, The University of Texas at Austin, Austin, Texas 78734; Division of the National Toxicology Program (V.A.C., S.E.F.), National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709; Department of Comparative Biosciences (J.A.F.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802; Institute of Bioengineering and CIBERDEM (A.N.), Miguel Hernandez University of Elche, 03202 Elche, Alicante, Spain; Departments of Urology, Pathology, and Physiology & Biophysics (G.S.P.), College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612; Departments of Physiology and Pediatrics (J.T.), University of Turku and Turku University Hospital, 20520 Turku, Finland; and Biology Department (R.T.Z.), University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - G S Prins
- Pharmacology and Toxicology (A.C.G.), College of Pharmacy, The University of Texas at Austin, Austin, Texas 78734; Division of the National Toxicology Program (V.A.C., S.E.F.), National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709; Department of Comparative Biosciences (J.A.F.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802; Institute of Bioengineering and CIBERDEM (A.N.), Miguel Hernandez University of Elche, 03202 Elche, Alicante, Spain; Departments of Urology, Pathology, and Physiology & Biophysics (G.S.P.), College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612; Departments of Physiology and Pediatrics (J.T.), University of Turku and Turku University Hospital, 20520 Turku, Finland; and Biology Department (R.T.Z.), University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - J Toppari
- Pharmacology and Toxicology (A.C.G.), College of Pharmacy, The University of Texas at Austin, Austin, Texas 78734; Division of the National Toxicology Program (V.A.C., S.E.F.), National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709; Department of Comparative Biosciences (J.A.F.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802; Institute of Bioengineering and CIBERDEM (A.N.), Miguel Hernandez University of Elche, 03202 Elche, Alicante, Spain; Departments of Urology, Pathology, and Physiology & Biophysics (G.S.P.), College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612; Departments of Physiology and Pediatrics (J.T.), University of Turku and Turku University Hospital, 20520 Turku, Finland; and Biology Department (R.T.Z.), University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| | - R T Zoeller
- Pharmacology and Toxicology (A.C.G.), College of Pharmacy, The University of Texas at Austin, Austin, Texas 78734; Division of the National Toxicology Program (V.A.C., S.E.F.), National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709; Department of Comparative Biosciences (J.A.F.), University of Illinois at Urbana-Champaign, Urbana, Illinois 61802; Institute of Bioengineering and CIBERDEM (A.N.), Miguel Hernandez University of Elche, 03202 Elche, Alicante, Spain; Departments of Urology, Pathology, and Physiology & Biophysics (G.S.P.), College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612; Departments of Physiology and Pediatrics (J.T.), University of Turku and Turku University Hospital, 20520 Turku, Finland; and Biology Department (R.T.Z.), University of Massachusetts at Amherst, Amherst, Massachusetts 01003
| |
Collapse
|
35
|
Wang CF, Tian Y. Reproductive endocrine-disrupting effects of triclosan: Population exposure, present evidence and potential mechanisms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2015; 206:195-201. [PMID: 26184583 DOI: 10.1016/j.envpol.2015.07.001] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 06/29/2015] [Accepted: 07/01/2015] [Indexed: 05/24/2023]
Abstract
Triclosan has been used as a broad-spectrum antibacterial agent for over 40 years worldwide. Increasing reports indicate frequent detection and broad exposure to triclosan in the natural environment and the human body. Current laboratory studies in various species provide strong evidence for its disrupting effects on the endocrine system, especially reproductive hormones. Multiple modes of action have been suggested, including disrupting hormone metabolism, displacing hormones from hormone receptors and disrupting steroidogenic enzyme activity. Although epidemiological studies on its effects in humans are mostly negative but conflicting, which is typical of much of the early evidence on the toxicity of EDCs, overall, the evidence suggests that triclosan is an EDC. This article reviews human exposure to triclosan, describes the current evidence regarding its reproductive endocrine-disrupting effects, and discusses potential mechanisms to provide insights for further study on its endocrine-disrupting effects in humans.
Collapse
Affiliation(s)
- Cai-Feng Wang
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University, Shanghai, China; School of Nursing, Shanghai Jiao Tong University, Shanghai, China.
| | - Ying Tian
- Department of Environmental Health, School of Public Health, Shanghai Jiao Tong University, Shanghai, China; MOE-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
| |
Collapse
|
36
|
Lange A, Sebire M, Rostkowski P, Mizutani T, Miyagawa S, Iguchi T, Hill EM, Tyler CR. Environmental chemicals active as human antiandrogens do not activate a stickleback androgen receptor but enhance a feminising effect of oestrogen in roach. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2015; 168:48-59. [PMID: 26440146 DOI: 10.1016/j.aquatox.2015.09.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 09/16/2015] [Accepted: 09/22/2015] [Indexed: 05/22/2023]
Abstract
Sexual disruption is reported in wild fish populations living in freshwaters receiving discharges of wastewater treatment works (WwTW) effluents and is associated primarily with the feminisation of males by exposure to oestrogenic chemicals. Antiandrogens could also contribute to the feminisation of male fish, but there are far less data supporting this hypothesis and almost nothing is known for the effects of oestrogens in combination with antiandrogens in fish. We conducted a series of in vivo exposures in two fish species to investigate the potency on reproductive-relevant endpoints of the antiandrogenic antimicrobials triclosan (TCS), chlorophene (CP) and dichlorophene (DCP) and the resin, abietic acid (AbA), all found widely in WwTW effluents. We also undertook exposures with a mixture of antiandrogens and a mixture of antiandrogens in combination with the oestrogen 17α-ethinyloestradiol (EE2). In stickleback (Gasterosteus aculeatus), DCP showed a tendency to reduce spiggin induction in females androgenised by dihydrotestosterone (DHT), but these findings were not conclusive. In roach (Rutilus rutilus), exposures to DCP (178 days), or a mixture of TCS, CP and AbA (185 days), or to the model antiandrogen flutamide (FL, 178 days) had no effect on gonadal sex ratio or on the development of the reproductive ducts. Exposure to EE2 (1.5ng/L, 185 days) induced feminisation of the ducts in 17% of the males and in the mixture of antiandrogens (TCS, CP, AbA) in combination with EE2, almost all (96%) of the males had a feminised reproductive ducts. In stickleback androgen receptor (ARα and ARβ) transactivation assays, the model antiandrogens, FL and procymidone inhibited 11-ketotestosterone (11-KT) induced receptor activation, but none of the human antiandrogens, TCS, CP, DCP and AbA had an effect. These data indicate that antimicrobial antiandrogens in combination can contribute to the feminisation process in exposed males, but they do not appear to act through the androgen receptor in fish.
Collapse
Affiliation(s)
- Anke Lange
- University of Exeter, Biosciences, College of Life & Environmental Sciences, Exeter EX4 4QD, United Kingdom.
| | - Marion Sebire
- University of Exeter, Biosciences, College of Life & Environmental Sciences, Exeter EX4 4QD, United Kingdom; Cefas Weymouth Laboratory, Barrack Road, The Nothe, Weymouth, Dorset DT4 8UB, United Kingdom
| | - Pawel Rostkowski
- University of Sussex, School of Life Sciences, Brighton BN1 9QJ, United Kingdom
| | - Takeshi Mizutani
- Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences, and Department of Basic Biology, School of Life Science, SOKENDAI (Graduate University for Advanced Studies), 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Shinichi Miyagawa
- Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences, and Department of Basic Biology, School of Life Science, SOKENDAI (Graduate University for Advanced Studies), 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Taisen Iguchi
- Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, National Institutes of Natural Sciences, and Department of Basic Biology, School of Life Science, SOKENDAI (Graduate University for Advanced Studies), 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - Elizabeth M Hill
- University of Sussex, School of Life Sciences, Brighton BN1 9QJ, United Kingdom
| | - Charles R Tyler
- University of Exeter, Biosciences, College of Life & Environmental Sciences, Exeter EX4 4QD, United Kingdom.
| |
Collapse
|
37
|
Liu J, Wang J, Zhao C, Hay AG, Xie H, Zhan J. Triclosan removal in wetlands constructed with different aquatic plants. Appl Microbiol Biotechnol 2015; 100:1459-1467. [DOI: 10.1007/s00253-015-7063-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 09/28/2015] [Accepted: 10/06/2015] [Indexed: 10/22/2022]
|
38
|
Chang X, Kleinstreuer N, Ceger P, Hsieh JH, Allen D, Casey W. Application of Reverse Dosimetry to Compare In Vitro and In Vivo Estrogen Receptor Activity. ACTA ACUST UNITED AC 2015. [DOI: 10.1089/aivt.2014.0005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xiaoqing Chang
- Integrated Laboratory Systems, Inc./NTP Interagency Center for the Evaluation of Alternative Toxicological Methods, Morrisville, North Carolina
| | - Nicole Kleinstreuer
- Integrated Laboratory Systems, Inc./NTP Interagency Center for the Evaluation of Alternative Toxicological Methods, Morrisville, North Carolina
| | - Patricia Ceger
- Integrated Laboratory Systems, Inc./NTP Interagency Center for the Evaluation of Alternative Toxicological Methods, Morrisville, North Carolina
| | - Jui-Hua Hsieh
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
| | - Dave Allen
- Integrated Laboratory Systems, Inc./NTP Interagency Center for the Evaluation of Alternative Toxicological Methods, Morrisville, North Carolina
| | - Warren Casey
- NTP Interagency Center for the Evaluation of Alternative Toxicological Methods, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
| |
Collapse
|
39
|
Witorsch RJ. Critical analysis of endocrine disruptive activity of triclosan and its relevance to human exposure through the use of personal care products. Crit Rev Toxicol 2014; 44:535-55. [PMID: 24897554 DOI: 10.3109/10408444.2014.910754] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This review examines the mammalian and human literature pertaining to the potential endocrine disruptive effects of triclosan (TCS). Dietary exposure to TCS consistently produces a dose-dependent decrease in serum thyroxine (T4) in rats without any consistent change in TSH or triiodothyronine (T3). Human studies reveal no evidence that the TCS exposure through personal care product use affects the thyroid system. TCS binds to both androgen and estrogen receptors in vitro with low affinity and evokes diverse responses (e.g., agonist, antagonist, or none) in steroid receptor transfected cell-based reporter assays. Two of three studies in rats have failed to show that TCS exposure suppresses male reproductive function in vivo. Three of four studies have failed to show that TCS possesses estrogenic (or uterotrophic) activity in rats. However, two studies reported that, while TCS lacks estrogenic activity, it can amplify the action of estrogen in vivo. The in vitro, in vivo, and epidemiologic studies reviewed herein show little evidence that TCS adversely affects gestation or postpartum development of offspring. Furthermore, previously reported toxicity testing in a variety of mammalian species shows little evidence that TCS adversely affects thyroid function, male and female reproductive function, gestation, or postpartum development of offspring. Finally, doses of TCS reported to produce hypothyroxinemia, and occasional effects on male and female reproduction, gestation, and offspring in animal studies are several orders of magnitude greater than the estimated exposure levels of TCS in humans. Overall, little evidence exists that TCS exposure through personal care product use presents a risk of endocrine disruptive adverse health effects in humans.
Collapse
Affiliation(s)
- Raphael J Witorsch
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University , Richmond, VA , USA
| |
Collapse
|
40
|
Kim JY, Yi BR, Go RE, Hwang KA, Nam KH, Choi KC. Methoxychlor and triclosan stimulates ovarian cancer growth by regulating cell cycle- and apoptosis-related genes via an estrogen receptor-dependent pathway. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 37:1264-74. [PMID: 24835555 DOI: 10.1016/j.etap.2014.04.013] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Revised: 03/20/2014] [Accepted: 04/08/2014] [Indexed: 05/15/2023]
Abstract
Methoxychlor and triclosan are emergent or suspected endocrine-disrupting chemicals (EDCs). Methoxychlor [MXC; 1,1,1-trichlor-2,2-bis (4-methoxyphenyl) ethane] is an organochlorine pesticide that has been primarily used since dichlorodiphenyltrichloroethane (DDT) was banned. In addition, triclosan (TCS) is used as a common component of soaps, deodorants, toothpastes, and other hygiene products at concentrations up to 0.3%. In the present study, the potential impact of MXC and TCS on ovarian cancer cell growth and underlying mechanism(s) was examined following their treatments in BG-1 ovarian cancer cells. As results, MXC and TCS induced BG-1 cell growth via regulating cyclin D1, p21 and Bax genes related with cell cycle and apoptosis. A methylthiazolyldiphenyl-tetrazolium bromide (MTT) assay confirmed that the proliferation of BG-1 ovarian cancer cells was stimulated by MXC (10(-6), 10(-7), 10(-8), and 10(-9)M) or TCS (10(-6), 10(-7), 10(-8), and 10(-9)M). Treatment of BG-1 cells with MXC or TCS resulted in the upregulation of cyclin D1 and downregulation of p21 and Bax transcriptions. In addition, the protein level of cyclin D1 was increased by MXC or TCS while p21 and Bax protein levels appeared to be reduced in these cells. Furthermore, MXC- or TCS-induced alterations of these genes were reversed in the presence of ICI 182,780 (10(-7)M), suggesting that the changes in these gene expressions may be regulated by an ER-dependent signaling pathway. In conclusion, the results of our investigation indicate that two potential EDCs, MXC and TCS, may stimulate ovarian cancer growth by regulating cell cycle- and apoptosis-related genes via an ER-dependent pathway.
Collapse
Affiliation(s)
- Joo-Young Kim
- Laboratory of Veterinary Biochemistry and Immunology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Bo-Rim Yi
- Laboratory of Veterinary Biochemistry and Immunology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Ryeo-Eun Go
- Laboratory of Veterinary Biochemistry and Immunology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Kyung-A Hwang
- Laboratory of Veterinary Biochemistry and Immunology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea
| | - Ki-Hoan Nam
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gun, Chungbuk, Republic of Korea
| | - Kyung-Chul Choi
- Laboratory of Veterinary Biochemistry and Immunology, College of Veterinary Medicine, Chungbuk National University, Cheongju, Chungbuk, Republic of Korea.
| |
Collapse
|
41
|
Evaluation of subchronic inhalation toxicity of methylcyclopentane in rats. Food Chem Toxicol 2014; 63:186-94. [DOI: 10.1016/j.fct.2013.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2013] [Revised: 10/30/2013] [Accepted: 11/03/2013] [Indexed: 11/21/2022]
|
42
|
Pycke BG, Geer LA, Dalloul M, Abulafia O, Jenck AM, Halden RU. Human fetal exposure to triclosan and triclocarban in an urban population from Brooklyn, New York. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2014; 48:8831-8. [PMID: 24971846 PMCID: PMC4123932 DOI: 10.1021/es501100w] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 05/20/2014] [Accepted: 06/27/2014] [Indexed: 05/21/2023]
Abstract
Triclosan (TCS) and triclocarban (TCC) are antimicrobial agents formulated in a wide variety of consumer products (including soaps, toothpaste, medical devices, plastics, and fabrics) that are regulated by the U.S. Food and Drug Administration (FDA) and U.S. Environmental Protection Agency. In late 2014, the FDA will consider regulating the use of both chemicals, which are under scrutiny regarding lack of effectiveness, potential for endocrine disruption, and potential contribution to bacterial resistance to antibiotics. Here, we report on body burdens of TCS and TCC resulting from real-world exposures during pregnancy. Using liquid chromatography tandem mass spectrometry, we determined the concentrations of TCS, TCC, and its human metabolites (2'-hydroxy-TCC and 3'-hydroxy-TCC) as well as the manufacturing byproduct (3'-chloro-TCC) as total concentrations (Σ-) after conjugate hydrolysis in maternal urine and cord blood plasma from a cohort of 181 expecting mother/infant pairs in an urban multiethnic population from Brooklyn, NY recruited in 2007-09. TCS was detected in 100% of urine and 51% of cord blood samples after conjugate hydrolysis. The interquartile range (IQR) of detected TCS concentrations in urine was highly similar to the IQR reported previously for the age-matched population of the National Health and Nutrition Examination Survey (NHANES) from 2003 to 2004, but typically higher than the IQR reported previously for the general population (detection frequency = 74.6%). Urinary levels of TCC are reported here for the first time from real-world exposures during pregnancy, showing a median concentration of 0.21 μg/L. Urinary concentrations of TCC correlated well with its phase-I metabolite ∑-2'-hydroxy-TCC (r = 0.49) and the manufacturing byproduct ∑-3'-chloro-TCC C (r = 0.79), and ∑-2'-hydroxy-TCC correlated strongly with ∑-3'-hydroxy-TCC (r = 0.99). This human biomonitoring study presents the first body burden data for TCC from exposures occurring during pregnancy and provides additional data on composite exposure to TCS (i.e., from both consumer-product use and environmental sources) in the maternal-fetal unit for an urban population in the United States.
Collapse
Affiliation(s)
- Benny
F. G. Pycke
- Center
for Environmental Security, The Biodesign Institute, Arizona State University, 781 East Terrace Mall, Tempe, Arizona 85287, United
States
| | - Laura A. Geer
- Department of Environmental and Occupational
Health Sciences, State University of New
York, Downstate School of Public
Health, Box 43, 450 Clarkson
Avenue, Brooklyn, New York 11203, United States
| | - Mudar Dalloul
- Department
of Obstetrics and Gynecology, State University
of New York Downstate Medical Center, 445 Lenox Road, Brooklyn, New York 11203, United
States
| | - Ovadia Abulafia
- Department
of Obstetrics and Gynecology, State University
of New York Downstate Medical Center, 445 Lenox Road, Brooklyn, New York 11203, United
States
| | - Alizee M. Jenck
- Center
for Environmental Security, The Biodesign Institute, Arizona State University, 781 East Terrace Mall, Tempe, Arizona 85287, United
States
| | - Rolf U. Halden
- Center
for Environmental Security, The Biodesign Institute, Arizona State University, 781 East Terrace Mall, Tempe, Arizona 85287, United
States
- Phone: (480) 727-0893. E-mail:
| |
Collapse
|
43
|
Axelstad M, Boberg J, Vinggaard AM, Christiansen S, Hass U. Triclosan exposure reduces thyroxine levels in pregnant and lactating rat dams and in directly exposed offspring. Food Chem Toxicol 2013; 59:534-40. [PMID: 23831729 DOI: 10.1016/j.fct.2013.06.050] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 06/24/2013] [Accepted: 06/25/2013] [Indexed: 01/23/2023]
Abstract
Thyroid disrupting chemicals can potentially disrupt brain development. Two studies investigating the effect of the antibacterial compound triclosan on thyroxine (T₄) levels in rats are reported. In the first, Wistar rat dams were gavaged with 75, 150 or 300 mg triclosan/kg bw/day throughout gestation and lactation. Total T₄ serum levels were measured in dams and offspring, and all doses of triclosan significantly lowered T₄ in dams, but no significant effects on T₄ levels were seen in the offspring at the end of the lactation period. Since this lack of effect could be due to minimal exposure through maternal milk, a second study using direct per oral pup exposure from postnatal day 3-16 to 50 or 150 mg triclosan/kg bw/day was performed. This exposure pointed to significant T₄ reductions in 16 day old offspring in both dose groups. These results corroborate previous studies showing that in rats lactational transfer of triclosan seems limited. Since an optimal study design for testing potential developmental neurotoxicants in rats, should include exposure during both the pre- and postnatal periods of brain development, we suggest that in the case of triclosan, direct dosing of pups may be the best way to obtain that goal.
Collapse
Affiliation(s)
- Marta Axelstad
- National Food Institute, Technical University of Denmark, Division of Toxicology and Risk Assessment, Søborg, Denmark.
| | | | | | | | | |
Collapse
|
44
|
Hontela A, Habibi HR. Personal Care Products in the Aquatic Environment: A Case Study on the Effects of Triclosan in Fish. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/b978-0-12-398254-4.00008-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
|