1
|
Silva NP, da Costa CS, Barbosa KL, Januario CDF, Gama-de-Souza LN, Breves C, Fortunato RS, Miranda-Alves L, de Oliveira M, Nogueira CR, Graceli JB. Subacute tributyltin exposure alters the development and morphology of mammary glands in association with CYP19A1 expression in female rats. Reprod Toxicol 2024; 128:108635. [PMID: 38936095 DOI: 10.1016/j.reprotox.2024.108635] [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: 04/04/2024] [Revised: 05/29/2024] [Accepted: 06/06/2024] [Indexed: 06/29/2024]
Abstract
Tributyltin (TBT) is an endocrine-disrupting chemical (EDC) related to reproductive dysfunctions. However, few studies have investigated the effects of TBT exposure on mammary gland development. Thus, we assessed whether subacute TBT exposure causes irregularities in mammary gland development. We administered TBT (100 and 1,000 ng/kg/day for 30 days) to female rats from postnatal day (PND) 25 to PND 55, and mammary gland development, morphology, inflammation, collagen deposition, and protein expression were evaluated. Abnormal mammary gland development was observed in both TBT groups. Specifically, TBT exposure reduced the number of terminal end buds (TEBs), type 1 (AB1) alveolar buds, and type 2 (AB2) alveolar buds. An increase in the lobule and differentiation (DF) 2 score was found in the mammary glands of TBT rats. TBT exposure increased mammary gland blood vessels, mast cell numbers, and collagen deposition. Additionally, both TBT rats exhibited intraductal hyperplasia and TEB-like structures. An increase in estrogen receptor alpha (ERα), progesterone receptor (PR), and cytochrome P450 family 19 subfamily A member 1 (CYP19A1) - positive cells was observed in the mammary glands of TBT rats. A strong negative correlation was observed between CYP19A1- positive cells and TEB number. In addition, CYP19A1 - positive cells were positively correlated with mammary gland TEB-like structure, ductal hyperplasia, inflammation, and collagen deposition. Thus, these data suggest that TBT exposure impairs mammary gland development through the modulation of CYP19A1 signaling pathways in female rats.
Collapse
Affiliation(s)
- Natalia P Silva
- Department of Morphology, Federal University of Espírito Santo, Vitória 290440-090, Brazil
| | - Charles S da Costa
- Department of Morphology, Federal University of Espírito Santo, Vitória 290440-090, Brazil
| | - Kayke L Barbosa
- Department of Morphology, Federal University of Espírito Santo, Vitória 290440-090, Brazil
| | - Cidália de F Januario
- Department of Morphology, Federal University of Espírito Santo, Vitória 290440-090, Brazil
| | | | - Cinthia Breves
- Health Science Center, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941590, Brazil
| | - Rodrigo S Fortunato
- Health Science Center, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941590, Brazil
| | - Leandro Miranda-Alves
- Experimental Endocrinology Research, Development and Innovation Group, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, 21941902, Brazil
| | - Miriane de Oliveira
- Department of Internal Clinic, Botucatu Medicine School, São Paulo State University (UNESP), Botucatu, São Paulo 18618687, Brazil
| | - Celia R Nogueira
- Department of Internal Clinic, Botucatu Medicine School, São Paulo State University (UNESP), Botucatu, São Paulo 18618687, Brazil
| | - Jones B Graceli
- Department of Morphology, Federal University of Espírito Santo, Vitória 290440-090, Brazil.
| |
Collapse
|
2
|
Yu Y, Jia Y, Liu Q, Zhao L, Lin H, Liu Z, Fang T, Jiang W, Cui H, Hou S, Guo L. Prenatal phthalate exposure and birth size: a systematic review and meta-analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2024; 34:2813-2829. [PMID: 37979196 DOI: 10.1080/09603123.2023.2275645] [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: 03/31/2023] [Accepted: 10/22/2023] [Indexed: 11/20/2023]
Abstract
Phthalates are common endocrine disruptors. The placental barrier can be crossed by phthalates and may have a negative impact on the health of the fetus. However, the association between prenatal exposure to phthalates and birth size is still debatable. Here, we performed this meta-analysis to assess the relationship between prenatal phthalates exposure and birth size. Eighteen studies were finally included by searching PubMed, Embase, Scopus, Ovid, and Web of Science databases and standardized regression coefficients and standard errors were used to pool effect size. Our results showed that prenatal exposure to MMP (=-0.04, 95%CI: -0.08, -0.01) and MEP (=-0.01, 95%CI: -0.01, -0.002) was significantly associated with birth weight. However, no significant associations were identified for phthalate exposure with birth length, head circumference and chest circumference. Because the limiting of studies, more high-quality case-control studies or cohort studies are urgently needed to draw the best conclusions.
Collapse
Affiliation(s)
- Yuanyuan Yu
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, China
- Tianjin Fourth Central Hospital, Tianjin, China
| | - Yaning Jia
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, China
- Tianjin Fourth Central Hospital, Tianjin, China
| | - Qisijing Liu
- Research Institute of Public Health, School of Medicine, Nankai University, Tianjin, China
| | - Lei Zhao
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, China
- Tianjin Fourth Central Hospital, Tianjin, China
- Wenzhou Safety (Emergency) Institute, Tianjin University, Wenzhou, China
| | - Huishu Lin
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, China
- Tianjin Fourth Central Hospital, Tianjin, China
- Wenzhou Safety (Emergency) Institute, Tianjin University, Wenzhou, China
| | - Ziquan Liu
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, China
- Tianjin Fourth Central Hospital, Tianjin, China
- Wenzhou Safety (Emergency) Institute, Tianjin University, Wenzhou, China
| | - Tao Fang
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, China
- Tianjin Fourth Central Hospital, Tianjin, China
- Wenzhou Safety (Emergency) Institute, Tianjin University, Wenzhou, China
| | - Wenbing Jiang
- Research Institute of Public Health, School of Medicine, Nankai University, Tianjin, China
- Department of Cardiology, The Dingli Clinical College of Wenzhou Medical University, Wenzhou, China
| | - Huanhuan Cui
- Wenzhou Safety (Emergency) Institute, Tianjin University, Wenzhou, China
| | - Shike Hou
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, China
- Tianjin Fourth Central Hospital, Tianjin, China
- Tianjin Key Laboratory of Disaster Medicine Technology, Tianjin, China
| | - Liqiong Guo
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, China
- Tianjin Fourth Central Hospital, Tianjin, China
- Wenzhou Safety (Emergency) Institute, Tianjin University, Wenzhou, China
| |
Collapse
|
3
|
Tuli A, Suresh G, Halder N, Velpandian T. Analysis and remediation of phthalates in aquatic matrices: current perspectives. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:23408-23434. [PMID: 38456985 DOI: 10.1007/s11356-024-32670-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 02/23/2024] [Indexed: 03/09/2024]
Abstract
Phthalic acid esters (PAEs) are high production volume chemicals used extensively as plasticizers, to increase the flexibility of the main polymer. They are reported to leach into their surroundings from plastic products and are now a ubiquitous environmental contaminant. Phthalate levels have been determined in several environmental matrices, especially in water. These levels serve as an indicator of plasticizer abuse and plastic pollution, and also serve as a route of exposure to different species including humans. Reports published on effects of different PAEs on experimental models demonstrate their carcinogenic, teratogenic, reproductive, and endocrine disruptive effects. Therefore, regular monitoring and remediation of environmental water samples is essential to ascertain their hazard quotient and daily exposure levels. This review summarises the extraction and detection techniques available for phthalate analysis in water samples such as chromatography, biosensors, immunoassays, and spectroscopy. Current remediation strategies for phthalate removal such as adsorption, advanced oxidation, and microbial degradation have also been highlighted.
Collapse
Affiliation(s)
- Anannya Tuli
- High Precision Bio-Analytical Facility (DST-FIST Sponsored), Ocular Pharmacology and Pharmacy, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Gayatri Suresh
- High Precision Bio-Analytical Facility (DST-FIST Sponsored), Ocular Pharmacology and Pharmacy, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Nabanita Halder
- High Precision Bio-Analytical Facility (DST-FIST Sponsored), Ocular Pharmacology and Pharmacy, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, 110029, India
| | - Thirumurthy Velpandian
- High Precision Bio-Analytical Facility (DST-FIST Sponsored), Ocular Pharmacology and Pharmacy, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, 110029, India.
| |
Collapse
|
4
|
Huang L, Hu Y, Li G, Ouyang C, Yi L, Wu S, Zhu Z, Ma T. Quantitative composite testing model based on measurement uncertainty and its application for the detection of phthalate esters. Front Chem 2023; 11:1191669. [PMID: 37789964 PMCID: PMC10544567 DOI: 10.3389/fchem.2023.1191669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 09/06/2023] [Indexed: 10/05/2023] Open
Abstract
To improve the quantitative detection efficiency of chemical analysis and reduce the detection cost, the sample pass rate was estimated and mathematical statistics were used to calculate the optimal group size (K opt) of the composite testing to save on the maximum workload. A quantitative composite testing model was developed based on chemical analysis measurement uncertainty. Using this model, the maximum allowable number of composited samples (K max) is first calculated using parameters of regulated limits (L), limit of quantification (LOQ), and method measured uncertainty (U rel) to ensure that the sensitivity of the composite testing can meet the limit requirements. Finally, the appropriate composite group size (K a) can be obtained by creating a balance between K opt, K max, and the practical information used for that particular test. Furthermore, based on a constructed model, a practical quantitative composite testing method of 3-10 samples was established for the routine detection of toy phthalates (PAEs). The experimental results showed that the quantitative limits of 7 PAEs were 9.1-41.8 mg/kg, the relative expansion uncertainties were 16.6%-23.2%, and the recovery rates were 91.0%-112.3%, with a relative deviation of less than 10%. All these meet international PAEs standards. Compared with the traditional individual and qualitative composite testing, this model will not decrease the detection sensitivity, but can save up to 17.9%-80.4% of the workload when it is employed in toy PAEs testing with the pass rate of 80%-99%. This quantitative composite testing method will be implemented in the coming revision of ISO 8124-6 toy PAEs standards.
Collapse
Affiliation(s)
- Lina Huang
- Quality and Standards Academy, Shenzhen Technology University, Shenzhen, China
| | - Yi Hu
- Institute for Advanced Study, Shenzhen University, Shenzhen, China
| | - Guanwei Li
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
| | - Caiding Ouyang
- Technology Center of Guangzhou Customs District, Guangzhou, China
| | - Lezhou Yi
- Technology Center of Guangzhou Customs District, Guangzhou, China
| | - Shanshan Wu
- Technology Center of Guangzhou Customs District, Guangzhou, China
| | - Zhenhai Zhu
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
| | - Tongmei Ma
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, China
| |
Collapse
|
5
|
Li H, Tang M, Cao A, Guo L. Assessing the relationship between air pollution, agricultural insurance, and agricultural green total factor productivity: evidence from China. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:78381-78395. [PMID: 35689771 DOI: 10.1007/s11356-022-21287-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 05/31/2022] [Indexed: 06/15/2023]
Abstract
As a favorite means to promote the development of green agriculture, agricultural insurance can not only encourage farmers to adopt green production technology and improve production efficiency, but also achieve the purpose of reducing the input of chemicals to protect the environment. This article aims to study the dynamic relationship between agricultural insurance, air pollution, and agricultural green total factor productivity using the panel vector auto-regressive method (PVAR) and panel data of 30 provinces in China from 2005 to 2018. The empirical results show that there is a significant cross-sectional dependence and the co-integration relationship between agricultural insurance, air pollution, and agricultural green total factor productivity. The increase in agricultural insurance can improve agricultural green total factor productivity and aggravate air pollution to a certain extent. However, serious air pollution does not improve agricultural green total factor productivity. Panel Granger causality test results show that agricultural insurance has a one-way causal relationship with green total factor productivity and air pollution, and so does air pollution with agricultural green total factor productivity. In addition, impulse response results show that increasing agricultural insurance or reducing air pollution can improve agricultural green total factor productivity. These conclusions have long-term practical implications for both agricultural policymakers and environmental managers.
Collapse
Affiliation(s)
- Houjian Li
- College of Economics, Sichuan Agricultural University, Chengdu, 611130, China
| | - Mengqian Tang
- College of Economics, Sichuan Agricultural University, Chengdu, 611130, China
| | - Andi Cao
- College of Economics, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lili Guo
- College of Economics, Sichuan Agricultural University, Chengdu, 611130, China.
| |
Collapse
|
6
|
Prenatal and perinatal phthalate exposure is associated with sex-dependent changes in hippocampal miR-15b-5p and miR-34a-5p expression and changes in testicular morphology in rat offspring. Arh Hig Rada Toksikol 2022; 73:191-199. [PMID: 36226823 PMCID: PMC9837528 DOI: 10.2478/aiht-2022-73-3641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 09/01/2022] [Indexed: 12/23/2022] Open
Abstract
MicroRNAs are a large group of non-coding nucleic acids, usually 20-22 nt long, which bind to regulatory sections of messenger RNA (mRNA) and inhibit gene expression. However, genome activity is also regulated by hormones. Endocrine disruptors such as those from the phthalate group imitate or block these hormonal effects, and our previous study showed a long-lasting decrease in plasma testosterone levels in rat offspring exposed to a mixture of three phthalates in utero and postnatally. These effects were also observed at the behavioural level. To shed more light on these findings, in this new study we compared testicular tissue morphology between control and phthalatetreated males and investigated possible persistent changes and sex differences in the expression of two hippocampal microRNAs - miR- 15b-5p and miR-34a-5p - participating in the transcription of steroidogenic genes. Histologically observed changes in testicular tissue morphology of phthalate-exposed males compared to control support testosterone drop observed in the previous study. At the microRNA level, we observed more significant changes in phthalate-treated females than in males. However, we are unable to relate these effects to the previously observed behavioural changes.
Collapse
|
7
|
Xu WJ, Wan Q, Wang WF, Wang Y, Feng FY, Cheng JJ, Yuan JJ, Yu XY. Biodegradation of dibutyl phthalate by a novel endophytic Bacillus subtilis strain HB-T2 under in-vitro and in-vivo conditions. ENVIRONMENTAL TECHNOLOGY 2022; 43:1917-1926. [PMID: 33251967 DOI: 10.1080/09593330.2020.1858181] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 11/21/2020] [Indexed: 06/12/2023]
Abstract
The environmental prevalence and potential toxicity of dibutyl phthalate (DBP) motivate the attempt to develop feasible strategies to deal with DBP contamination. In this study, a strain of endphytic bacteria HB-T2 was isolated from sorrel roots and identified as Bacillus sp. by analysing its morphology, physiology, biochemistry and 16S rDNA sequence. The degradation efficiency of DBP by HB-T2 was almost identical under the temperature of 30∼40°C, but was significantly enhanced as the culture pH and inoculum size increases from 6.0 to 8.0, and 1% to 5% respectively. The degradation kinetics of DBP could be well described by the first-order kinetic model, with the degradation half-life ranging from 1.59 to 7.61 h when the initial concentrations of DBP were in the range of 5-20 mg/L. LC-MS analysis of the culture samples taken at varying intervals revealed monobutyl phthalate, phthalic acid and protocatechuic acid as the major metabolic intermediates during the degradation process. HB-T2 exhibited an excellent capability to degrade a wide range of phthalate esters (PAEs), especially butyl benzyl phthalate (BBP), dipentyl phthalate (DPP), and diisobutyl phthalate (DIBP). Inoculation of HB-T2 into Chinese cabbage (Brassica chinensis L.) growing in DBP-contaminated soils could significantly reduce the DBP levels in plant tissues and relieve the phytotoxic effects of DBP. Results of this study highlighted the great potential of this novel endophytic Bacillus subtilis strain HB-T2 for bioremediation of PAEs contamination and improvement of agricultural product safety by reducing PAEs accumulation in edible crops.
Collapse
Affiliation(s)
- Wen-Jun Xu
- College of Oceanology and Food Science, Quanzhou Normal University/Key Laboratory of Inshore Resources Biotechnology, Quanzhou, People's Republic of China
- Key Laboratory of Food Quality and Safety of Jiangsu Province, State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Nanjing, People's Republic of China
| | - Qun Wan
- Key Laboratory of Food Quality and Safety of Jiangsu Province, State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Nanjing, People's Republic of China
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, People's Republic of China
| | - Wen-Feng Wang
- Key Laboratory of Food Quality and Safety of Jiangsu Province, State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Nanjing, People's Republic of China
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, People's Republic of China
| | - Ya Wang
- Key Laboratory of Food Quality and Safety of Jiangsu Province, State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Nanjing, People's Republic of China
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, People's Republic of China
| | - Fa-Yun Feng
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, People's Republic of China
| | - Jin-Jin Cheng
- Key Laboratory of Food Quality and Safety of Jiangsu Province, State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Nanjing, People's Republic of China
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, People's Republic of China
| | - Jian-Jun Yuan
- College of Oceanology and Food Science, Quanzhou Normal University/Key Laboratory of Inshore Resources Biotechnology, Quanzhou, People's Republic of China
| | - Xiang-Yang Yu
- Key Laboratory of Food Quality and Safety of Jiangsu Province, State Key Laboratory Breeding Base, Key Laboratory of Control Technology and Standard for Agro-product Safety and Quality, Ministry of Agriculture, Nanjing, People's Republic of China
- Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing, People's Republic of China
| |
Collapse
|
8
|
Sharma P, Lee JYL, Tsai EM, Chang Y, Suen JL. n-Butyl Benzyl Phthalate Exposure Promotes Lesion Survival in a Murine Endometriosis Model. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18073640. [PMID: 33807420 PMCID: PMC8036315 DOI: 10.3390/ijerph18073640] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 03/24/2021] [Accepted: 03/30/2021] [Indexed: 01/02/2023]
Abstract
Endometriosis is an inflammatory and estrogen-dependent gynecological disease associated with exposure to environmental endocrine disruptors. n-Butyl benzyl phthalate (BBP), a ubiquitous plasticizer, has weak estrogenic activity, and exposure to BBP is associated with endometriosis. We aimed to elucidate the immunomodulatory effect of BBP on endometriosis development. We previously established a surgery-induced endometriosis-like murine model. In the present study, we exposed those mice to BBP 10 days prior to surgery and 4 weeks after surgery at physiologically relevant doses to mimic human exposure. Chronic exposure to BBP did not promote the growth of endometriotic lesions; however, the lesion survival rate in BBP-treated mice did increase significantly compared with control mice. Multiparametric flow cytometry showed that BBP exposure did not affect the homeostasis of infiltrated immune subsets in lesions but did enhance CD44 (adhesion marker) expression on plasmacytoid dendritic cells (pDCs). Blocking CD44 interactions locally inhibited endometriotic lesion growth. Immunofluorescence results further confirmed that CD44 blocking inhibited pDC infiltration and reduced the frequency of CD44+ pDCs in endometriotic tissues. BBP also disrupted the estrus cycle in these mice. This study suggests that chronic exposure to low-dose BBP may promote survival of endometriotic tissue through CD44-expressing pDCs.
Collapse
Affiliation(s)
- Pooja Sharma
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (P.S.); (J.-Y.L.L.); (E.-M.T.)
| | - Jo-Yu Lynn Lee
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (P.S.); (J.-Y.L.L.); (E.-M.T.)
| | - Eing-Mei Tsai
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (P.S.); (J.-Y.L.L.); (E.-M.T.)
- Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan
| | - Yu Chang
- Department of Obstetrics and Gynecology, E-Da Hospital, I-Shou University, Kaohsiung 82445, Taiwan;
| | - Jau-Ling Suen
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; (P.S.); (J.-Y.L.L.); (E.-M.T.)
- Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80756, Taiwan
- Correspondence:
| |
Collapse
|
9
|
Wang X, Zhang Y, Huang B, Chen Z, Zhong M, Wang W, Liu X, Fan YN, Hu W. Atmospheric phthalate pollution in plastic agricultural greenhouses in Shaanxi Province, China. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 269:116096. [PMID: 33279271 DOI: 10.1016/j.envpol.2020.116096] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 11/09/2020] [Accepted: 11/14/2020] [Indexed: 06/12/2023]
Abstract
Phthalate pollution in soil and vegetables in plastic agricultural greenhouses has attracted wide concern. Investigating airborne phthalates in this environment can improve understanding of air-soil or air-vegetable phthalate migration. However, studies of phthalates in plastic agricultural greenhouse air are rare. To fill this gap, 25 gas-phase and 23 particle-phase samples were collected from 12 typical plastic greenhouses in Shaanxi. 16 types of phthalates were measured by a gas chromatography-mass spectrometry system (GC-MS) to analyse their pollution features and variations. Results showed that in the air of the plastic greenhouses, the median concentration of the sum of sixteen type phthalates (∑16 phthalates) was 5305 ng m-3, with 5th-95th value of 1214-9616 ng m-3. Phthalates in gas-phase samples were over 100 times higher than the levels in particle-phase samples. Air phthalate concentrations in the plastic greenhouses were higher than those in the control groups (P < 0.05). Air bis (2-ethylhexyl) phthalate (DEHP) and di-n-butyl phthalate (DnBP) accounted for 66.9% and 29.3% of total ∑16 phthalate concentrations, respectively. Air phthalate concentrations in the plastic greenhouses in winter were 1.1-5.3 times higher than the levels in summer respectively (P < 0.05). Gas-particle partition coefficients (KP) values of DEHP in summer (median of 1.52 × 10-4 m3 μg-1) were higher than KP values of DnBP in summer (0.60 × 10-4 m3 μg-1). Log-transformed KP values of DnBP and DEHP were linear correlated to the reciprocal of air temperatures, respectively (P < 0.05).
Collapse
Affiliation(s)
- Xinkai Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yanxia Zhang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China; School of Environment, Nanjing Normal University, Nanjing, 210023, China.
| | - Biao Huang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Zhikun Chen
- Key Laboratory of Soil Resource & Biotech Applications, Shaanxi Academy of Sciences, Xi'an Botanical Garden of Shaanxi Province (Institute of Botany of Shaanxi Province), Xi'an, 710061, China
| | - Ming Zhong
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Weixi Wang
- Key Laboratory of Soil Resource & Biotech Applications, Shaanxi Academy of Sciences, Xi'an Botanical Garden of Shaanxi Province (Institute of Botany of Shaanxi Province), Xi'an, 710061, China
| | - Xiaofei Liu
- Key Laboratory of Soil Resource & Biotech Applications, Shaanxi Academy of Sciences, Xi'an Botanical Garden of Shaanxi Province (Institute of Botany of Shaanxi Province), Xi'an, 710061, China
| | - Ya' Nan Fan
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Wenyou Hu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| |
Collapse
|
10
|
Graceli JB, Dettogni RS, Merlo E, Niño O, da Costa CS, Zanol JF, Ríos Morris EA, Miranda-Alves L, Denicol AC. The impact of endocrine-disrupting chemical exposure in the mammalian hypothalamic-pituitary axis. Mol Cell Endocrinol 2020; 518:110997. [PMID: 32841708 DOI: 10.1016/j.mce.2020.110997] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 08/14/2020] [Accepted: 08/17/2020] [Indexed: 12/15/2022]
Abstract
The hypothalamic-pituitary axis (HP axis) plays a critical and integrative role in the endocrine system control to maintain homeostasis. The HP axis is responsible for the hormonal events necessary to regulate the thyroid, adrenal glands, gonads, somatic growth, among other functions. Endocrine-disrupting chemicals (EDCs) are a worldwide public health concern. There is growing evidence that exposure to EDCs such as bisphenol A (BPA), some phthalates, polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and biphenyls (PBBs), dichlorodiphenyltrichloroethane (DDT), tributyltin (TBT), and atrazine (ATR), is associated with HP axis abnormalities. EDCs act on hormone receptors and their downstream signaling pathways and can interfere with hormone synthesis, metabolism, and actions. Because the HP axis function is particularly sensitive to endogenous hormonal changes, disruptions by EDCs can alter HP axis proper function, leading to important endocrine irregularities. Here, we review the evidence that EDCs could directly affect the mammalian HP axis function.
Collapse
Affiliation(s)
- Jones B Graceli
- Department of Morphology, Health Sciences Center, Federal University of Espirito Santo. Av. Marechal Campos, 1468, CEP: 290440-090 Vitória, ES, Brazil.
| | - Raquel S Dettogni
- Department of Morphology, Health Sciences Center, Federal University of Espirito Santo. Av. Marechal Campos, 1468, CEP: 290440-090 Vitória, ES, Brazil.
| | - Eduardo Merlo
- Department of Morphology, Health Sciences Center, Federal University of Espirito Santo. Av. Marechal Campos, 1468, CEP: 290440-090 Vitória, ES, Brazil.
| | - Oscar Niño
- Department of Morphology, Health Sciences Center, Federal University of Espirito Santo. Av. Marechal Campos, 1468, CEP: 290440-090 Vitória, ES, Brazil.
| | - Charles S da Costa
- Department of Morphology, Health Sciences Center, Federal University of Espirito Santo. Av. Marechal Campos, 1468, CEP: 290440-090 Vitória, ES, Brazil.
| | - Jordana F Zanol
- Department of Morphology, Health Sciences Center, Federal University of Espirito Santo. Av. Marechal Campos, 1468, CEP: 290440-090 Vitória, ES, Brazil.
| | - Eduardo A Ríos Morris
- Laboratory of Experimental Endocrinology-LEEx, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Brazil. Graduate Program in Endocrinology, Faculty of Medicine, Federal University of Rio de Janeiro, Brazil.
| | - Leandro Miranda-Alves
- Laboratory of Experimental Endocrinology-LEEx, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Brazil. Graduate Program in Endocrinology, Faculty of Medicine, Federal University of Rio de Janeiro, Brazil. Graduate Program in Pharmacology and Medicinal Chemistry, Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Brazil.
| | - Anna C Denicol
- Department of Animal Science, University of California, Davis, One Shields Avenue Davis, CA, 95616, USA.
| |
Collapse
|
11
|
Ding J, Dong L, Geng Y, Huang H, Zhao G, Jiang J, Qiu S, Yuan Y, Zhao Q. Modification of graphite felt doped with nitrogen and boron for enhanced removal of dimethyl phthalate in peroxi-coagulation system and mechanisms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:18810-18821. [PMID: 32207015 DOI: 10.1007/s11356-020-08384-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 03/09/2020] [Indexed: 06/10/2023]
Abstract
To enhance the generation of hydrogen peroxide (H2O2), a modified graphite felt cathode doped with nitrogen and boron was developed and used in peroxi-coagulation system to degrade dimethyl phthalate (DMP). After a simple modification method, the yield of H2O2 on cathode increased from 9.39 to 152.8 mg/L, with current efficiency increased from 1.61 to 70.3%. Complete degradation of DMP and 80% removal of TOC were achieved within 2 h at the optimal condition with pH of 5, cathodic potential of - 0.69 V (vs. SCE), oxygen aeration, and electrode gap of 1 cm. Possible mechanism with synergistic effect of electro-Fenton and electrocoagulation process in the peroxi-coagulation system was revealed via quenching experiments. The prospect of this system in the effluent of landfill leachate and domestic sewage was studied, achieving 50% and 61% of DMP removal in 2 h. This efficient system with simple modified cathode had promising prospects in practical applications.
Collapse
Affiliation(s)
- Jing Ding
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Langang Dong
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Yuxuan Geng
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Huibin Huang
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Guanshu Zhao
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Junqiu Jiang
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Shan Qiu
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Yixing Yuan
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Qingliang Zhao
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, 150090, China.
| |
Collapse
|
12
|
Parra-Forero LY, Veloz-Contreras A, Vargas-Marín S, Mojica-Villegas MA, Alfaro-Pedraza E, Urióstegui-Acosta M, Hernández-Ochoa I. Alterations in oocytes and early zygotes following oral exposure to di(2-ethylhexyl) phthalate in young adult female mice. Reprod Toxicol 2019; 90:53-61. [PMID: 31442482 DOI: 10.1016/j.reprotox.2019.08.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/30/2019] [Accepted: 08/16/2019] [Indexed: 11/17/2022]
Abstract
Because di(2-ethylhexyl) phthalate (DEHP) toxicity on ovarian function is incomplete, effects of DEHP oocyte fertilization and the resulting zygotes were investigated. Further, an analysis characterizing the stage of zygote arrest was performed. Female CD1 mice were dosed orally with DEHP (0, 20, 200 and 2000 μg/kg/day) for 30 days. Following an in vivo mating post-dosing, DEHP-treated females exhibited fewer oocytes/zygotes, fewer oocytes displaying the polar body extrusion, fewer 1-cell zygotes having 2-pronuclei, more unfertilized oocytes, and decreased number of zygotes at every stage of development. DEHP induced blastomere fragmentation in zygotes. DNA replication in zygotes directly assessed by the 5-Ethynyl-2'-deoxyuridine (5-EdU) incorporation assay and indirectly by dosing mice with 5-fluorouracil (5-FU) suggested that DEHP inhibits DNA replication. Our data suggest that DEHP at doses found in 'every-day' (200 μg/Kg/day) or occupational (2000 μg/Kg/day) environments induces zygote fragmentation and arrests its development from the 2-cell stage potentially impairing DNA replication.
Collapse
Affiliation(s)
- Lyda Yuliana Parra-Forero
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Ciudad de México, 07360, Mexico
| | - Arlet Veloz-Contreras
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Ciudad de México, 07360, Mexico
| | - Shirley Vargas-Marín
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Ciudad de México, 07360, Mexico
| | - María Angelica Mojica-Villegas
- Laboratorio de Toxicología de la Reproducción-Fertilidad, Departamento de Farmacia, Escuela Nacional de Ciencias Biológicas-IPN, Col. San Pedro Zacatenco, Ciudad de México, 2508, Mexico
| | - Elim Alfaro-Pedraza
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Ciudad de México, 07360, Mexico
| | | | - Isabel Hernández-Ochoa
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav), Av. Instituto Politécnico Nacional 2508, Col. San Pedro Zacatenco, Ciudad de México, 07360, Mexico.
| |
Collapse
|
13
|
Cai W, Yang J, Liu Y, Bi Y, Wang H. Association between Phthalate Metabolites and Risk of Endometriosis: A Meta-Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E3678. [PMID: 31574938 PMCID: PMC6801736 DOI: 10.3390/ijerph16193678] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 09/13/2019] [Accepted: 09/29/2019] [Indexed: 12/31/2022]
Abstract
Objective: The association between phthalates and endometriosis risk is inconclusive. This meta-analysis aims to evaluate the association between five different phthalate metabolites and endometriosis, based on current evidence. Methods: The literature included PubMed, WOS (web of science), and EMBASE, published until 3 March 2019. We selected the related literature and evaluated the relationship between phthalates exposure and endometriosis risk. All statistical analyses were conducted with STATA version 12.0. Results: Data from eight studies were used in this review. The results of this analysis showed that mono-(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP) exposure was potentially associated with endometriosis (OR = 1.246, 95% CI = 1.003-1.549). We have not found positive results in mono(2-ethylhexyl) phthalate (MEHP), monoethyl phthalate (MEP), monobenzyl phthalate (MBzP) and mono(2-ethyl-5-oxohexyl) phthalate (MEOHP) analyses (MEHP: OR = 1.089, 95% CI = 0.858-1.383; MEP: OR = 1.073, 95% CI = 0.899-1.282; MBzP: OR = 0.976, 95% CI = 0.810-1.176; MEOHP: OR = 1.282, 95% CI = 0.874-1.881). In subgroup analyses for regions, the associations were significant between MEHHP and endometriosis in Asia (OR = 1.786, 95% CI = 1.005-3.172, I² = 0%), but not in USA (OR = 1.170, 95% CI = 0.949-1.442, I² = 45.6%). Conclusions: Our findings suggested a potential statistical association between MEHHP exposure and endometriosis, particularly, the exposure of MEHHP might be a potential risk for women with endometriosis in Asia. However, positive associations between the other four Phthalate acid esters (PAEs) and endometriosis was not found. Given the weak strength of the results, well-designed cohort studies, with large sample sizes, should be performed in future.
Collapse
Affiliation(s)
- Wei Cai
- School of Health Sciences, Wuhan University, Wuhan 430071, China.
| | - Jule Yang
- School of Health Sciences, Wuhan University, Wuhan 430071, China.
| | - Yini Liu
- School of Health Sciences, Wuhan University, Wuhan 430071, China.
| | - Yongyi Bi
- School of Health Sciences, Wuhan University, Wuhan 430071, China.
| | - Hong Wang
- School of Health Sciences, Wuhan University, Wuhan 430071, China.
| |
Collapse
|
14
|
He Y, Wang Q, He W, Xu F. The occurrence, composition and partitioning of phthalate esters (PAEs) in the water-suspended particulate matter (SPM) system of Lake Chaohu, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 661:285-293. [PMID: 30677676 DOI: 10.1016/j.scitotenv.2019.01.161] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 01/13/2019] [Accepted: 01/13/2019] [Indexed: 06/09/2023]
Abstract
The occurrence, composition, and partitioning of six phthalate esters (PAEs) (dimethyl phthalate (DMP), diethyl phthalate (DEP), diisobutyl phthalate (DIBP), dibutyl phthalate (DBP), butyl benzyl phthalate (BBP) and di(2-ethylhexyl) phthalate (DEHP)) in the water-suspended particulate matter (SPM) system of Lake Chaohu were investigated in this study. Our results showed that PAEs were ubiquitous contaminants in Lake Chaohu. The concentration of the Σ6 PAEs in dissolved and particulate phases ranged from 0.370 to 13.2 μg·L-1 and from 14.4 to 7129 μg·L-1, respectively. The Σ6 PAEs in water and SPM phases exhibited different seasonal trends. PAEs with different degrees of hydrophobicity demonstrated different temporal distributions in the dissolved phase. In particulate phase, all PAEs exhibited the same temporal distribution. Regarding the occurrence of PAEs, significant spatial differences exist between lake and estuary. However, there were no specific differences in PAEs across lake zones and river types of Lake Chaohu. River input should be considered an important source of PAEs in Lake Chaohu. DIBP and DBP were the most abundant PAEs in Lake Chaohu, and DIBP should attract more attention in the future. The organic carbon normalized partitioning coefficient (logKoc) ranged from an average of 2.38 ± 0.86 L·g-1 for BBP to 3.98 ± 0.66 L·g-1 for DEHP, and approximately 2 to 3 unit variations of logKoc existed for the individual PAEs. It was difficult to ascertain whether the partitioning of PAEs was in, near or far from the equilibrium. No linear relationship was found between logKoc and the octanol-water partitioning coefficient (logKow) for PAEs. Koc might not be suitable for describing the partitioning of PAEs in the water-SPM system. The hydrophobicity of PAEs may have little impact on their partitioning in the complex environmental system, and the Kow model may be inappropriate to predict the partitioning of PAEs in natural large lakes.
Collapse
Affiliation(s)
- Yong He
- MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Qingmei Wang
- MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China; Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Key Laboratory of Agricultural Non-point Source Pollution Control, Ministry of Agriculture, Beijing 100081, China; School of Agriculture and Food, The University of Melbourne, Victoria 3010, Australia
| | - Wei He
- MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China; MOE Key Laboratory of Groundwater Circulation and Environmental Evolution,China University of Geosciences (Beijing), Beijing 100083, China
| | - Fuliu Xu
- MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
| |
Collapse
|
15
|
Increased Urinary Phthalate Levels in Women with Uterine Leiomyoma: A Case-Control Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13121247. [PMID: 27983712 PMCID: PMC5201388 DOI: 10.3390/ijerph13121247] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 12/09/2016] [Accepted: 12/11/2016] [Indexed: 01/05/2023]
Abstract
We assessed the urinary concentration of 16 phthalate metabolites in 57 women with and without uterine leiomyoma (n = 30 and 27; respectively) to determine the association between phthalate exposure and uterine leiomyoma. To evaluate exposure to di-(2-ethylhexyl) phthalate (DEHP); we calculated the molar sum of DEHP metabolites; ∑3-DEHP (combining mono-(2-ethylhexyl) phthalate (MEHP); mono-(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP); and mono-(2-ethyl-5-oxohexyl) phthalate); ∑4-DEHP (∑3-DEHP plus mono-(2-ethyl-5-carboxypentyl) phthalate); and ∑5-DEHP (∑4-DEHP plus mono (2-(carboxylmethyl)hexyl) phthalate (2cx-MMHP)). The log transformed urinary levels of MEHP; MEHHP; 2cx-MMHP; ∑3-DEHP; ∑4-DEHP; and ∑5-DEHP in the leiomyoma group were significantly higher than those of controls. When we adjusted for age; waist circumference; and parity using multiple logistic regression analyses; we found log ∑3-DEHP (OR = 10.82; 95% CI = 1.25; 93.46) and ∑4-DEHP (OR = 8.78; 95% CI = 1.03; 75.29) were significantly associated with uterine leiomyoma. Our findings suggest an association between phthalate exposure and uterine leiomyoma. However; larger studies are needed to investigate potential interactions between phthalate exposure and uterine leiomyoma.
Collapse
|
16
|
Kumar V, Maitra SS. Biodegradation of endocrine disruptor dibutyl phthalate (DBP) by a newly isolated Methylobacillus sp. V29b and the DBP degradation pathway. 3 Biotech 2016; 6:200. [PMID: 28330272 PMCID: PMC5031561 DOI: 10.1007/s13205-016-0524-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 09/14/2016] [Indexed: 11/24/2022] Open
Abstract
Bacteria of the genus Methylobacillus are methanotrophs, a metabolic feature that is widespread in the phylum Proteobacteria. The study demonstrates the isolation and characterization of a newly isolated Methylobacillus sp. V29b. which grows on methanol, protocatechuate, monobutyl phthalate, dibutyl phthalate, diethyl phthalate, benzyl butyl phthalate, dioctyl phthalate and diisodecyl phthalate. Methylobacillus sp. V29b was characterized with scanning electron microscopy, transmission electron microscopy, Gram staining, antibiotics sensitivity tests and biochemical characterization. It degrades 70 % of the initial DBP in minimal salt medium and 65 % of the initial DBP in samples contaminated with DBP. DBP biodegradation kinetics was explained by the Monod growth inhibition model. Values for maximum specific growth rate (µmax) and half-velocity constant (Ks) are 0.07 h−1 and 998.2 mg/l, respectively. Stoichiometry for DBP degradation was calculated for Methylobacillus sp. V29b. Four metabolic intermediates, dibutyl phthalate (DBP), monobutyl phthalate, phthalic acid and pyrocatechol, were identified. Based on the metabolic intermediates identified, a chemical pathway for DBP degradation was proposed. Six genes for phthalic acid degradation were identified from the genome of Methylobacillus sp. V29b.
Collapse
Affiliation(s)
- Vinay Kumar
- Lab No. 117, School of Biotechnology, Jawaharlal Nehru University, New Delhi, 110067, India.
| | - S S Maitra
- Lab No. 117, School of Biotechnology, Jawaharlal Nehru University, New Delhi, 110067, India
| |
Collapse
|
17
|
Qureshi MS, Yusoff ARBM, Wirzal MDH, Sirajuddin, Barek J, Afridi HI, Üstündag Z. Methods for the Determination of Endocrine-Disrupting Phthalate Esters. Crit Rev Anal Chem 2016; 46:146-59. [PMID: 25831046 DOI: 10.1080/10408347.2015.1004157] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Phthalates are endocrine disruptors frequently occurring in the general and industrial environment and in many industrial products. Moreover, they are also suspected of being carcinogenic, teratogenic, and mutagenic, and they show diverse toxicity profiles depending on their structures. The European Union and the United States Environmental Protection Agency (US EPA) have included many phthalates in the list of priority substances with potential endocrine-disrupting action. They are: dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), butylbenzyl phthalate (BBP), diethylhexyl phthalate (DEHP), di-iso-nonyl phthalate (DINP), di-iso-decyl phthalate (DIDP), di-n-decyl phthalate (DnDP), and dioctyl phthalate (DOP). There is an ever-increasing demand for new analytical methods suitable for monitoring different phthalates in various environmental, biological, and other matrices. Separation and spectrometric methods are most frequently used. However, modern electroanalytical methods can also play a useful role in this field because of their high sensitivity, reasonable selectivity, easy automation, and miniaturization, and especially low investment and running costs, which makes them suitable for large-scale monitoring. Therefore, this review outlines possibilities and limitations of various analytical methods for determination of endocrine-disruptor phthalate esters in various matrices, including somewhat neglected electroanalytical methods.
Collapse
Affiliation(s)
- Munawar Saeed Qureshi
- a Institute of Environmental & Water Resource Management (IPASA), Universiti Teknologi Malaysia , Malaysia.,b Education & Literacy Department , Government College & Postgraduate Center , Government of Sindh , Pakistan
| | | | - Mohd Dzul Hakim Wirzal
- a Institute of Environmental & Water Resource Management (IPASA), Universiti Teknologi Malaysia , Malaysia
| | | | - Jiri Barek
- d UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry , University Research Centre UNCE, Charles University in Prague , Prague , Czech Republic
| | - Hassan Imran Afridi
- c National Center of Excellence in Analytical Chemistry , University of Sindh , Jamshoro , Pakistan
| | - Zafer Üstündag
- e Department of Chemistry , Dumlupinar University , Kutahya , Turkey
| |
Collapse
|
18
|
Bhhatarai B, Wilson DM, Price PS, Marty S, Parks AK, Carney E. Evaluation of OASIS QSAR Models Using ToxCast™ in Vitro Estrogen and Androgen Receptor Binding Data and Application in an Integrated Endocrine Screening Approach. ENVIRONMENTAL HEALTH PERSPECTIVES 2016; 124:1453-61. [PMID: 27152837 PMCID: PMC5010395 DOI: 10.1289/ehp184] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 12/31/2015] [Accepted: 04/22/2016] [Indexed: 05/12/2023]
Abstract
BACKGROUND Integrative testing strategies (ITSs) for potential endocrine activity can use tiered in silico and in vitro models. Each component of an ITS should be thoroughly assessed. OBJECTIVES We used the data from three in vitro ToxCast™ binding assays to assess OASIS, a quantitative structure-activity relationship (QSAR) platform covering both estrogen receptor (ER) and androgen receptor (AR) binding. For stronger binders (described here as AC50 < 1 μM), we also examined the relationship of QSAR predictions of ER or AR binding to the results from 18 ER and 10 AR transactivation assays, 72 ER-binding reference compounds, and the in vivo uterotrophic assay. METHODS NovaScreen binding assay data for ER (human, bovine, and mouse) and AR (human, chimpanzee, and rat) were used to assess the sensitivity, specificity, concordance, and applicability domain of two OASIS QSAR models. The binding strength relative to the QSAR-predicted binding strength was examined for the ER data. The relationship of QSAR predictions of binding to transactivation- and pathway-based assays, as well as to in vivo uterotrophic responses, was examined. RESULTS The QSAR models had both high sensitivity (> 75%) and specificity (> 86%) for ER as well as both high sensitivity (92-100%) and specificity (70-81%) for AR. For compounds within the domains of the ER and AR QSAR models that bound with AC50 < 1 μM, the QSAR models accurately predicted the binding for the parent compounds. The parent compounds were active in all transactivation assays where metabolism was incorporated and, except for those compounds known to require metabolism to manifest activity, all assay platforms where metabolism was not incorporated. Compounds in-domain and predicted to bind by the ER QSAR model that were positive in ToxCast™ ER binding at AC50 < 1 μM were active in the uterotrophic assay. CONCLUSIONS We used the extensive ToxCast™ HTS binding data set to show that OASIS ER and AR QSAR models had high sensitivity and specificity when compounds were in-domain of the models. Based on this research, we recommend a tiered screening approach wherein a) QSAR is used to identify compounds in-domain of the ER or AR binding models and predicted to bind; b) those compounds are screened in vitro to assess binding potency; and c) the stronger binders (AC50 < 1 μM) are screened in vivo. This scheme prioritizes compounds for integrative testing and risk assessment. Importantly, compounds that are not in-domain, that are predicted either not to bind or to bind weakly, that are not active in in vitro, that require metabolism to manifest activity, or for which in vivo AR testing is in order, need to be assessed differently. CITATION Bhhatarai B, Wilson DM, Price PS, Marty S, Parks AK, Carney E. 2016. Evaluation of OASIS QSAR models using ToxCast™ in vitro estrogen and androgen receptor binding data and application in an integrated endocrine screening approach. Environ Health Perspect 124:1453-1461; http://dx.doi.org/10.1289/EHP184.
Collapse
Affiliation(s)
- Barun Bhhatarai
- Address correspondence to B. Bhhatarai, The Dow Chemical Company, Midland, MI 48674 USA. Telephone: (989) 638-6862. E-mail:
| | | | | | | | | | | |
Collapse
|
19
|
Sedha S, Gautam AK, Verma Y, Ahmad R, Kumar S. Determination of in vivo estrogenic potential of Di-isobutyl phthalate (DIBP) and Di-isononyl phthalate (DINP) in rats. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:18197-18202. [PMID: 26178834 DOI: 10.1007/s11356-015-5021-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 07/02/2015] [Indexed: 06/04/2023]
Abstract
Estrogenic potential of Di-isobutyl phthalate (DIBP) and Di-isononyl phthalate (DINP) was studied using two different test systems. Two different doses of DIBP (250 and 1250 mg/kg) and DINP (276 and 1380 mg/kg) were administered to immature female rats (20 days old) orally once daily for 3 and 20 days in uterotrophic and pubertal assay, respectively. The animals were sacrificed on day 4 and day 41 in case of 3-day uterotrophic and 20-day pubertal assay, respectively. The results indicated that non-significant alterations in uterine and ovarian wet weight were observed in both the DIBP- and DINP-treated groups while the uterus weight increased significantly (i.e., 4-6 times) in the Diethylstilbesterol (DES)-treated group in both the assays. In the present study, precocious vaginal opening occurred at 26 days of age in the DES-treated group with a mean body weight of 30.39 ± 1.08 g. However, no precocious vaginal opening was found in any of the DIBP- and DINP-treated groups. The results indicated that both the phthalate compounds were unable to induce elevation in the uterine weight in both the assays and unable to cause vaginal opening indicating non-estrogenic potential of both the phthalate compounds, i.e., DIBP and DINP in vivo.
Collapse
Affiliation(s)
- Sapna Sedha
- Division of Reproductive and Cytotoxicology, National Institute of Occupational Health (ICMR), Meghaninagar, Ahmedabad, 380016, India
| | - A K Gautam
- Division of Reproductive and Cytotoxicology, National Institute of Occupational Health (ICMR), Meghaninagar, Ahmedabad, 380016, India
| | - Y Verma
- Division of Reproductive and Cytotoxicology, National Institute of Occupational Health (ICMR), Meghaninagar, Ahmedabad, 380016, India
| | - R Ahmad
- Division of Reproductive and Cytotoxicology, National Institute of Occupational Health (ICMR), Meghaninagar, Ahmedabad, 380016, India
| | - Sunil Kumar
- Division of Reproductive and Cytotoxicology, National Institute of Occupational Health (ICMR), Meghaninagar, Ahmedabad, 380016, India.
| |
Collapse
|
20
|
Shi H, Cao Y, Shen Q, Zhao Y, Zhang Z, Zhang Y. Association Between Urinary Phthalates and Pubertal Timing in Chinese Adolescents. J Epidemiol 2015. [PMID: 26212725 PMCID: PMC4549609 DOI: 10.2188/jea.je20140205] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Phthalates are synthetic chemicals and ubiquitous environmental contaminants, with hormonal activity that may alter the course of pubertal development in children. OBJECTIVES To determine whether exposure to phthalate metabolites is associated with timing of pubertal development in a cross-sectional study of a school-based clustered sample of 503 children from a suburban district in Shanghai, China, who were 7-14 years of age at enrollment (2010 October to November). METHODS We analyzed six phthalate metabolites in urine samples by isotope-dilution liquid chromatography tandem mass spectrometry. The associations of exposures to phthalates with pubertal timing of testes, breast, and pubic hair development (represented as Tanner stages) were evaluated using an ordered logistic regression model adjusted for chronological age, body fat proportion (BF%), and parental education. RESULTS In boys, urinary mono-n-butyl phthalate (MBP) levels were negatively associated with testicular volume, and mono (2-ethyl-5-hydroxyhexyl) phthalate (MEHHP) and mono (2-ethyl-5-oxohexyl) phthalate (MEOHP) levels were negatively associated with pubic hair stages. The odds of being in an advanced stage were decreased by 43%-51%. In girls, mono (2-ethylhexyl) phthalate (MEHP), MEHHP, and MEOHP levels, as well as the sum of these levels, were positively associated with breast stages, and the association was much stronger in girls with high BF%; the odds of being in an advanced stage were increase by 29% to 50%. CONCLUSIONS Phthalate metabolites investigated in this study show significant associations with pubertal timing both in boys and in girls, especially among girls with high BF%.
Collapse
Affiliation(s)
- Huijing Shi
- School of Public Health, Fudan University & Key Laboratory of Public Health Safety, Chinese Ministry of Education
| | | | | | | | | | | |
Collapse
|
21
|
Kim MG, Kim TH, Shin BS, Lee YB, Lee JB, Choi HG, Lee Y, Yoo SD. Sensitive liquid chromatography-tandem mass spectrometry method for the simultaneous determination of benzyl butyl phthalate and its metabolites, monobenzyl phthalate and monobutyl phthalate, in rat plasma, urine, and various tissues collected from a toxicokinetic study. Anal Bioanal Chem 2015; 407:7391-400. [PMID: 26168976 DOI: 10.1007/s00216-015-8901-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 06/29/2015] [Accepted: 07/02/2015] [Indexed: 01/02/2023]
Abstract
This study describes the development of a sensitive liquid chromatography-electrospray-tandem mass spectrometry method for the simultaneous determination of benzyl butyl phthalate (BBP) and its major metabolites, monobenzyl phthalate (MBzP) and monobutyl phthalate (MBuP), in rat plasma, urine, and 10 different tissues. The method was validated with regard to the specificity, linearity, precision, accuracy, lower limit of quantification (LLOQ), recovery, and stability by using the matrix-matched quality control samples. The assay achieved LLOQ of 1 ng/ml of BBP for plasma and urine, 4 ng/g for kidney and liver, 10 ng/g for fat, and 20 ng/g for all other tissues. For MBzP and MBuP, the assay achieved LLOQ of 5 ng/ml for plasma and urine, 10 ng/g for fat, and 20 ng/g for all other tissues. The disposition of BBP was characterized by a large volume of distribution (71.1-82.9 l/kg) and a high clearance (838.7-871.0 ml/min/kg). It was extensively metabolized to MBzP and MBuP, with their levels consistently exceeding the BBP levels. The distribution of BBP, MBzP, and MBuP to tissues of kidney, liver, stomach, small intestine, large intestine, spleen, brain, testis, thyroid, and fat was determined under steady-state conditions. For BBP, the steady-state tissue-to-plasma partition coefficient (K p) was the highest for fat (25.0) followed by small intestine (2.6), thyroid (2.0), and stomach (1.1). In contrast, for MBzP and MBuP, it was the highest for kidney (2.0 and 4.3, respectively) and liver (4.3 and 2.1, respectively) but was less than unity for all other tissues. The developed assay method and findings of this study may be useful to evaluate the exposure and toxic potential of BBP and its metabolites in risk assessment.
Collapse
Affiliation(s)
- Min Gi Kim
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi-do, 440-746, South Korea
| | - Tae Hwan Kim
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi-do, 440-746, South Korea
| | - Beom Soo Shin
- College of Pharmacy, Catholic University of Daegu, Gyeongsan, Gyeongbuk, 712-702, South Korea
| | - Yong-Bok Lee
- College of Pharmacy, Chonnam National University, Buk-Gu, Gwangju, 500-757, South Korea
| | - Jong Bong Lee
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi-do, 440-746, South Korea
| | - Hyeon Gwan Choi
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi-do, 440-746, South Korea
| | - Youngsung Lee
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi-do, 440-746, South Korea
| | - Sun Dong Yoo
- School of Pharmacy, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon, Gyeonggi-do, 440-746, South Korea.
| |
Collapse
|
22
|
Chen P, Li S, Liu L, Xu N. Long-term effects of binary mixtures of 17α-ethinyl estradiol and dibutyl phthalate in a partial life-cycle test with zebrafish (Danio rerio). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2015; 34:518-526. [PMID: 25385324 DOI: 10.1002/etc.2803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Revised: 10/26/2014] [Accepted: 11/07/2014] [Indexed: 06/04/2023]
Abstract
Using 17α-ethinyl estradiol (EE2) and dibutyl phthalate (DBP) as a typical estrogen and phthalate ester, respectively, their combined in vivo effects on zebrafish (Danio rerio) were investigated from the juvenile state to the adult stage. The authors spiked EE2 (5 ng/L and 20 ng/L) and DBP (0.1 mg/L and 0.5 mg/L) either individually or in mixture. At 45 d postfertilization (dpf), the survival rate of zebrafish was comparable in all treatments. Dibutyl phthalate did not induce vitellogenin (VTG) synthesis, and no interaction was found between EE2 and DBP on VTG induction. At 90 dpf, both liver and gill were subject to more severe damage (lipid vacuoles of hepatocytes, amalgamation of gill lamellae, and clubbing at the tips of the secondary lamellae) when coexposed to these 2 chemicals, compared with single exposure. At 115 dpf, generally none of the binary mixture groups showed significantly different growth and sex ratios compared with the corresponding EE2 alone groups. In conclusion, no obvious interactions were detected between EE2 and DBP on the growth, VTG induction, or sex ratio of zebrafish, and they may act independently. However, the influence on morphology of gonad, liver, and gill induced by exposure to the mixture of EE2 and DBP was generally more potent than that by single exposure to EE2 or DBP, indicating the combined long-term harmful effects of EE2 and DBP on the development of zebrafish. Environ Toxicol Chem 2015;34:518-526. © 2014 SETAC.
Collapse
Affiliation(s)
- Pengyu Chen
- Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen, China
| | | | | | | |
Collapse
|
23
|
Zhang Y, Wang P, Wang L, Sun G, Zhao J, Zhang H, Du N. The influence of facility agriculture production on phthalate esters distribution in black soils of northeast China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 506-507:118-125. [PMID: 25460946 DOI: 10.1016/j.scitotenv.2014.10.075] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 10/21/2014] [Accepted: 10/21/2014] [Indexed: 06/04/2023]
Abstract
The current study investigates the existence of 15 phthalate esters (PAEs) in surface soils (27 samples) collected from 9 different facility agriculture sites in the black soil region of northeast China, during the process of agricultural production (comprising only three seasons spring, summer and autumn). Concentrations of the 15 PAEs detected significantly varied from spring to autumn and their values ranged from 1.37 to 4.90 mg/kg-dw, with a median value of 2.83 mg/kg-dw. The highest concentration of the 15 PAEs (4.90 mg/kg-dw) was determined in summer when mulching film was used in the greenhouses. Probably an increase in environmental temperature was a major reason for PAE transfer from the mulching film into the soil and coupled with the increased usage of chemical fertilizers in greenhouses. Results showed that of the 15 PAEs, di(2-ethylhexyl) phthalate(DEHP), di-n-butyl phthalate (DBP), diethyl phthalate (DEP) and dimethyl phthalate (DMP) were in abundance with the mean value of 1.12 ± 0.22, 0.46 ± 0.05, 0.36 ± 0.04, and 0.17 ± 0.01 mg/kg-dw, respectively; and their average contributions in spring, summer, and autumn ranged between 64.08 and 90.51% among the 15 PAEs. The results of Principal Component Analysis (PCA) indicated the concentration of these four main PAEs significantly differed among the facility agricultures investigated, during the process of agricultural production. In comparison with foreign and domestic results of previous researches, it is proved that the black soils of facility agriculture in northeast China show higher pollution situation comparing with non-facility agriculture soils.
Collapse
Affiliation(s)
- Ying Zhang
- School of Resources & Environment, Northeast Agricultural University, Harbin 150030, PR China.
| | - Pengjie Wang
- School of Resources & Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Lei Wang
- School of Resources & Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Guoqiang Sun
- School of Resources & Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Jiaying Zhao
- School of Resources & Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Hui Zhang
- School of Resources & Environment, Northeast Agricultural University, Harbin 150030, PR China
| | - Na Du
- School of Resources & Environment, Northeast Agricultural University, Harbin 150030, PR China
| |
Collapse
|
24
|
Bae J, Kim S, Kannan K, Buck Louis GM. Couples' urinary bisphenol A and phthalate metabolite concentrations and the secondary sex ratio. ENVIRONMENTAL RESEARCH 2015; 137:450-457. [PMID: 25677702 PMCID: PMC4355045 DOI: 10.1016/j.envres.2014.11.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 10/23/2014] [Accepted: 11/23/2014] [Indexed: 05/30/2023]
Abstract
With limited research focusing on non-persistent chemicals as exogenous factors affecting human sex selection, this study aimed to evaluate the association of urinary bisphenol A (BPA) and phthalate metabolite concentrations with the secondary sex ratio (SSR), defined as the ratio of male to female live births. The current analysis is limited to singleton live births (n=220, 43.9%) from the Longitudinal Investigation of Fertility and the Environment (LIFE) Study, in which couples discontinuing contraception with the intention of becoming pregnant were enrolled and followed while trying for pregnancy and through delivery for those achieving pregnancy. Using modified Poisson regression models accounting for potential confounders, we estimated the relative risks (RRs) of a male birth per standard deviation change in the log-transformed maternal, paternal, and couple urinary BPA and 14 phthalate metabolite concentrations (ng/mL) measured upon enrollment. When maternal and paternal chemical concentrations were modeled jointly, paternal BPA (RR, 0.77; 95% confidence interval [CI], 0.62-0.95) and mono-isobutyl phthalate (RR, 0.82; 95% CI, 0.67-1.00) were significantly associated with a female excess. Contrarily, maternal BPA (RR, 1.16; 95% CI, 1.03-1.31), mono-isobutyl phthalate (RR, 1.28; 95% CI, 1.06-1.54), mono-benzyl phthalate (RR, 1.31; 95% CI, 1.08-1.58), and mono-n-butyl phthalate (RR, 1.24; 95% CI, 1.01-1.51) were significantly associated with a male excess. These findings underscore varying patterns for the SSR in relation to parental exposures. Given the absence of previous investigation, these partner-specific associations of non-persistent chemicals with the SSR need future corroboration.
Collapse
Affiliation(s)
- Jisuk Bae
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 6100 Executive Boulevard, Rockville, MD 20852, USA; Department of Preventive Medicine, Catholic University of Daegu School of Medicine, 33 Duryugongwon-ro 17-gil Nam-gu, Daegu 705-718, Republic of Korea.
| | - Sungduk Kim
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 6100 Executive Boulevard, Rockville, MD 20852, USA.
| | - Kurunthachalam Kannan
- Wadsworth Center, New York State Department of Health, and Department of Environmental Health Sciences, School of Public Health, State University of New York at Albany, Empire State Plaza, P.O. Box 509, Albany, NY 12201-0509, USA.
| | - Germaine M Buck Louis
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 6100 Executive Boulevard, Rockville, MD 20852, USA.
| |
Collapse
|
25
|
Huang PC, Li WF, Liao PC, Sun CW, Tsai EM, Wang SL. Risk for estrogen-dependent diseases in relation to phthalate exposure and polymorphisms of CYP17A1 and estrogen receptor genes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:13964-13973. [PMID: 25030786 DOI: 10.1007/s11356-014-3260-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Accepted: 06/24/2014] [Indexed: 06/03/2023]
Abstract
Evidence has shown that polymorphisms of various genes known to be involved in estrogen biosynthesis and function are associated with estrogen-dependent diseases (EDDs). These genes include CYP17A1, estrogen receptor 1 (ESR1), and 2 (ESR2). Phthalates are considered estrogenic endocrine disruptors, and recent research has suggested that they may act as a risk factor for EDDs. However, extremely few studies have assessed the effects of gene-environment interaction on these diseases. We recruited 44 patients with endometriosis or adenomyosis, 36 patients with leiomyoma, and 69 healthy controls from a medical center in Taiwan between 2005 and 2007. Urine samples were collected and analyzed for seven phthalate metabolites using liquid chromatography tandem mass spectrometry. Peripheral lymphocytes were used for DNA extraction to determine the genotype of CYP17A1, ESR1, and ESR2. Compared to controls, patients with leiomyoma had significantly higher levels of total urinary mono-ethylhexyl phthalate (ΣMEHP) (52.1 vs. 29.6 μg/g creatinine, p = 0.040), mono-n-butyl phthalate (MnBP) (75.4 vs. 51.3 μg/g creatinine, p = 0.019), and monoethyl phthalate (MEP) (103.7 vs. 59.3 μg/g creatinine, p = 0.031). In contrast, patients with endometriosis or adenomyosis showed a marginally increased level of urinary MEHP only. Subjects who were homozygous for both the ESR1 C allele (rs2234693) and CYP17A1 C allele (rs743572) showed a significantly increased risk for leiomyoma (OR = 19.8; 95 % CI, 1.70; 231.5; p = 0.017) relative to subjects with other genotypes of ESR1 and CYP17A1. These results were obtained after adjusting for age, cigarette smoking, MEHP level, GSTM1 genotype and other covariates. Our results suggested that both CYP17A1 and ESR1 polymorphisms may modulate the effects of phthalate exposure on the development of leiomyoma.
Collapse
Affiliation(s)
- Po-Chin Huang
- National Environmental Health Research Center (NEHRC), National Health Research Institutes (NHRI), Miaoli, Taiwan
| | | | | | | | | | | |
Collapse
|
26
|
Su PH, Chen JY, Lin CY, Chen HY, Liao PC, Ying TH, Wang SL. Sex steroid hormone levels and reproductive development of eight-year-old children following in utero and environmental exposure to phthalates. PLoS One 2014; 9:e102788. [PMID: 25207995 PMCID: PMC4160173 DOI: 10.1371/journal.pone.0102788] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 06/23/2014] [Indexed: 11/18/2022] Open
Abstract
In utero exposure to phthalates may adversely affect reproductive development in children due to the anti-androgenic properties of the pthalates. Accordingly, we aimed to determine the effects of in utero and environmental phthalate exposure on the reproductive development of eight-year-old children. We recruited 180 children in central Taiwan during November 2001 and followed them until August 2009 when all children became eight years old. Birth outcomes were collected. Bone age, hormone concentrations, and reproductive developmental stages were determined. Phthalate metabolite levels, including mono-2-ethylhexyl phthalate [MEHP], mono-n-butyl phthalate [MnBP], and mono-benzyl phthalate [MBzP], were assessed. No significant gender differences were found in in utero phthalate exposure. Maternal urinary levels of phthalate metabolites did not correlate significantly with birth outcomes, physical characteristics, and reproductive hormones of the eight-year-old children. Regarding the urinary phthalate metabolite levels of the eight-year-old children, MEHP correlated significantly with serum progesterone levels. MEHP levels in girls correlated significantly with serum progesterone levels. MnBP correlated significantly with serum FSH in all children. In girls, MnBP correlated with serum FSH, and MBzP correlated with serum progesterone and FSH levels. Urinary phthalate metabolite levels did not correlate with female developmental stages or the development of female reproductive organs. Phthalate metabolites did not correlate with the physical characteristics and reproductive hormones in boys. Therefore, environmental exposure to phthalates, as determined by urinary phthalate metabolite levels of eight-year-old children, may affect reproductive hormone levels in children, indicating that further studies on the environmental health effects of phthalates are warranted.
Collapse
Affiliation(s)
- Pen-Hua Su
- Department of Pediatrics, Chung Shan Medical University Hospital, Taichung City, Taiwan
- School of Medicine, Chung Shan Medical University, Taichung City, Taiwan
- Division of Environmental Health and Occupational Medicine, National Health Research Institutes, Zhunan, Taiwan
| | - Jia-Yuh Chen
- Department of Pediatrics, Chung Shan Medical University Hospital, Taichung City, Taiwan
- School of Medicine, Chung Shan Medical University, Taichung City, Taiwan
| | - Ching-Yi Lin
- Department of Obstetrics and Gynecology, School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Obstetrics and Gynecology, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Hsiao-Yen Chen
- Division of Environmental Health and Occupational Medicine, National Health Research Institutes, Zhunan, Taiwan
| | - Pao-Chi Liao
- Department of Environmental and Occupational Health, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Sustainable Environment Research Center, National Cheng Kung University, Tainan, Taiwan
| | - Tsung-Ho Ying
- Department of Obstetrics and Gynecology, School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Obstetrics and Gynecology, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Shu-Li Wang
- Division of Environmental Health and Occupational Medicine, National Health Research Institutes, Zhunan, Taiwan
- The Department of Public Health, Chung Shan Medical University, Taichung, Taiwan
- * E-mail:
| |
Collapse
|
27
|
Unal G, Marquez EC, Feld M, Stavropoulos P, Callard IP. Isolation of estrogen receptor subtypes and vitellogenin genes: Expression in female Chalcalburnus tarichi. Comp Biochem Physiol B Biochem Mol Biol 2014; 172-173:67-73. [DOI: 10.1016/j.cbpb.2014.04.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 03/17/2014] [Accepted: 04/08/2014] [Indexed: 11/17/2022]
|
28
|
Manzetti S, van der Spoel ER, van der Spoel D. Chemical Properties, Environmental Fate, and Degradation of Seven Classes of Pollutants. Chem Res Toxicol 2014; 27:713-37. [DOI: 10.1021/tx500014w] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sergio Manzetti
- Uppsala
Center for Computational Chemistry, Science for Life Laboratory, Department
of Cell and Molecular Biology, University of Uppsala, Box 596, SE-75124 Uppsala, Sweden
- Fjordforsk A.S., Midtun, 6894 Vangsnes, Norway
| | - E. Roos van der Spoel
- Uppsala
Center for Computational Chemistry, Science for Life Laboratory, Department
of Cell and Molecular Biology, University of Uppsala, Box 596, SE-75124 Uppsala, Sweden
| | - David van der Spoel
- Uppsala
Center for Computational Chemistry, Science for Life Laboratory, Department
of Cell and Molecular Biology, University of Uppsala, Box 596, SE-75124 Uppsala, Sweden
| |
Collapse
|
29
|
Takahara Y, Kinashi Y, Takahara Y, Hichiya H, Okada K, Murata M, Shigeyama M, Hanioka N. Butylbenzyl Phthalate Hydrolysis in Liver Microsomes of Humans, Monkeys, Dogs, Rats and Mice. Biol Pharm Bull 2014; 37:703-6. [DOI: 10.1248/bpb.b14-00002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yuka Takahara
- Faculty of Pharmaceutical Sciences, Okayama University
| | - Yu Kinashi
- Faculty of Pharmaceutical Sciences, Okayama University
| | | | - Hiroyuki Hichiya
- Laboratory of Biochemical Toxicology, Yokohama College of Pharmacy
| | - Kenji Okada
- Laboratory of Clinical Pharmaceutics, Yokohama College of Pharmacy
| | - Mikio Murata
- Laboratory of Pharmaceutics, Yokohama College of Pharmacy
| | - Masato Shigeyama
- Laboratory of Clinical Pharmaceutics, Yokohama College of Pharmacy
| | | |
Collapse
|
30
|
Masood F, Malik A. Mutagenicity and genotoxicity assessment of industrial wastewaters. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:7386-7397. [PMID: 23640391 DOI: 10.1007/s11356-013-1756-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 04/18/2013] [Indexed: 06/02/2023]
Abstract
The genotoxicity of industrial wastewaters from Jajmau (Kanpur), was carried out by Ames Salmonella/microsome test, DNA repair-defective mutants, and Allium cepa anaphase-telophase test. Test samples showed maximum response with TA98 strain with and without metabolic activation. Amberlite resins concentrated wastewater samples were found to be more mutagenic as compared to those of liquid-liquid extracts (hexane and dichloromethane extracts). The damage in the DNA repair defective mutants in the presence of Amberlite resins concentrated water samples were found to be higher to that of liquid-liquid-extracted water samples at the dose level of 20 μl/ml culture. Among all the mutants, polA exhibited maximum decline with test samples. Mitotic index (MI) of root tip meristematic cells of A. cepa treated with 5, 10, 25, 50, and 100 % (v/v) wastewaters were significantly lower than the control. Complementary to the lower levels of MI, the wastewaters showed higher chromosomal aberration levels in all cases investigated.
Collapse
Affiliation(s)
- Farhana Masood
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, 202002, India
| | | |
Collapse
|
31
|
He W, Qin N, Kong X, Liu W, He Q, Ouyang H, Yang C, Jiang Y, Wang Q, Yang B, Xu F. Spatio-temporal distributions and the ecological and health risks of phthalate esters (PAEs) in the surface water of a large, shallow Chinese lake. THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 461-462:672-680. [PMID: 23770548 DOI: 10.1016/j.scitotenv.2013.05.049] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Revised: 05/17/2013] [Accepted: 05/17/2013] [Indexed: 06/02/2023]
Abstract
The spatio-temporal distributions and the ecological and health risks of PAEs in surface water of Lake Chaohu, the fifth largest lake in China, were studied based on the monthly monitoring of six PAE congeners from May 2010 to April 2011. The annual total concentration of the six PAE congeners (Σ6PAE) in the surface water ranged from 0.467 to 17.953 μg L(-1), with the average value of 4.042±3.929 μg L(-1). The di-n-butyl phthalate (DnBP) that dominated the Σ6PAE at 65.8% was found at its highest and lowest levels in the western lake (TX) and eastern drinking water source area (JC), respectively. The temporal distributions of Σ6PAE showed that the highest and lowest levels were observed in September 2010 and June 2010, respectively. The different relationships between the runoff and the PAEs with low and high levels of carbon might suggest their different sources. The DnBP had much greater ecological risks than the other studied PAE congeners as indicated by its potential affected fractions (PAFs) and the margin of safety (MOS10). The PAE congeners studied posed little health risk to the nearby male and female citizens.
Collapse
Affiliation(s)
- Wei He
- Ministry of Education Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, PR China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Yang F, Wang M, Wang Z. Sorption behavior of 17 phthalic acid esters on three soils: effects of pH and dissolved organic matter, sorption coefficient measurement and QSPR study. CHEMOSPHERE 2013; 93:82-89. [PMID: 23742892 DOI: 10.1016/j.chemosphere.2013.04.081] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 02/26/2013] [Accepted: 04/30/2013] [Indexed: 06/02/2023]
Abstract
This work studies the sorption behaviors of phthalic acid esters (PAEs) on three soils by batch equilibration experiments and quantitative structure property relationship (QSPR) methodology. Firstly, the effects of soil type, dissolved organic matter and pH on the sorption of four PAEs (DMP, DEP, DAP, DBP) are investigated. The results indicate that the soil organic carbon content has a crucial influence on sorption progress. In addition, a negative correlation between pH values and the sorption capacities was found for these four PAEs. However, the effect of DOM on PAEs sorption may be more complicated. The sorption of four PAEs was promoted by low concentrations of DOM, while, in the case of high concentrations, the influence of DOM on the sorption was complicated. Then the organic carbon content normalized sorption coefficient (logKoc) values of 17 PAEs on three soils were measured, and the mean values ranged from 1.50 to 7.57. The logKoc values showed good correlation with the corresponding logKow values. Finally, two QSPR models were developed with 13 theoretical parameters to get reliable logKoc predictions. The leave-one-out cross validation (CV-LOO) indicated that the internal predictive power of the two models was satisfactory.
Collapse
Affiliation(s)
- Fen Yang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Xianlin Campus, Nanjing University, Nanjing 210046, PR China
| | | | | |
Collapse
|
33
|
Ahmad R, Verma Y, Gautam AK, Kumar S. Assessment of estrogenic potential of di-n-butyl phthalate and butyl benzyl phthalate in vivo. Toxicol Ind Health 2013; 31:1296-303. [DOI: 10.1177/0748233713491803] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Phthalate compounds are widely used industrial chemicals; when incorporated into polyvinyl chloride, they are not covalently bound and released into the surrounding media. Some of them have estrogenic potential in vitro but data on in vivo studies are scanty. For the 3-day uterotrophic assay, di- n-butyl phthalate (DBP;10 and 100 mg/kg), butyl benzyl phthalate (BBP; 20 and 200 mg/kg), and diethylstilbestrol (DES, 40 µg/kg, positive control) were administered orally to immature female rats for three consecutive days from postnatal day (PND) 21. For the 20-day pubertal onset assay, DBP (10 and 20 mg/kg), BBP (20 and 200 mg/kg), and DES (6 µg/kg) were administered orally from PND 21 daily for 20 days. In the uterotrophic assay, in groups treated with higher dose of DBP and BBP, the uterine wet weight significantly decreased in the higher dose, and there were minor variations in the ovary wet weight, while the wet weight of these organs increased significantly in DES-treated group. In the 20-day pubertal assay, the weight of uterus and ovary declined significantly and changes in vaginal weight were nonsignificant in DBP- and BBP-treated groups. However, in DES-treated group nonsignificant elevation in vagina weight was observed. All the DES-treated animals showed the vaginal opening (VO) on day 26.17 ± 0.16. However, VO was not observed in any of the animals in control, vehicle control, BBP-, and DBP-treated groups up to PND 42, except in one animal each in vehicle control and DBP (100 mg/kg)-treated groups. The data indicated that both DBP and BBP were unable to induce elevation in the uterine and ovarian weight. While DES treatment can accelerate the growth of uterus and ovary and alter the onset of puberty and estrous cyclicity in prepubertal rats. These suggest that these compounds may not have estrogenic potential in vivo.
Collapse
Affiliation(s)
- Rahish Ahmad
- Division of Reproductive and Cytotoxicology, National Institute of Occupational Health (ICMR), Ahmedabad, Gujarat, India
| | - Yogendra Verma
- Division of Reproductive and Cytotoxicology, National Institute of Occupational Health (ICMR), Ahmedabad, Gujarat, India
| | - Anil K Gautam
- Division of Reproductive and Cytotoxicology, National Institute of Occupational Health (ICMR), Ahmedabad, Gujarat, India
| | - Sunil Kumar
- Division of Reproductive and Cytotoxicology, National Institute of Occupational Health (ICMR), Ahmedabad, Gujarat, India
| |
Collapse
|
34
|
Faraji H, Mirzaie A, Waqif-Husain S. Liquid phase microextraction-ion exchange-high performance thin layer chromatography for the preconcentration, separation, and determination of plasticizers in aqueous samples. J Sep Sci 2013; 36:1486-92. [DOI: 10.1002/jssc.201200995] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Revised: 01/17/2013] [Accepted: 01/17/2013] [Indexed: 11/05/2022]
Affiliation(s)
- Hakim Faraji
- Department of Chemistry; Faculty of Science; Varamin-Pishva Branch; Islamic Azad University; Varamin Iran
| | - Afshin Mirzaie
- Faculty of Food Science and Technology; Science and Research Branch; Islamic Azad University; Tehran Iran
| | - Syed Waqif-Husain
- Department of Chemistry; Science and Research Branch; Islamic Azad University; Tehran Iran
| |
Collapse
|
35
|
Fairbairn EA, Bonthius J, Cherr GN. Polycyclic aromatic hydrocarbons and dibutyl phthalate disrupt dorsal-ventral axis determination via the Wnt/β-catenin signaling pathway in zebrafish embryos. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2012; 124-125:188-196. [PMID: 22975441 DOI: 10.1016/j.aquatox.2012.08.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 08/20/2012] [Accepted: 08/21/2012] [Indexed: 06/01/2023]
Abstract
The canonical Wnt/β-catenin signaling pathway is critical during early teleost development for establishing the dorsal-ventral axis. Within this pathway, GSK-3β, a key regulatory kinase in the Wnt pathway, regulates β-catenin degradation and thus the ability of β-catenin to enter nuclei, where it can activate expression of genes that have been linked to the specification of the dorsal-ventral axis. In this study, we describe the morphological abnormalities that resulted in zebrafish embryos when axis determination was disrupted by environmental contaminants. These abnormalities were linked to abnormal nuclear accumulation of β-catenin. Furthermore, we demonstrated that the developmental abnormalities and altered nuclear β-catenin accumulation occurred when embryos were exposed to commercial GSK-3β inhibitors. Zebrafish embryos were exposed to commercially available GSK-3 inhibitors (GSK-3 Inhibitor IX and 1-azakenpaullone), or common environmental contaminants (dibutyl phthalate or the polycyclic aromatic hydrocarbons phenanthrene and fluorene) from the 2 to 8-cell stage through the mid-blastula transition (MBT). These embryos displayed morphological abnormalities at 12.5 h post-fertilization (hpf) that were comparable to embryos exposed to lithium chloride (LiCl) (300 mM LiCl for 10 min, prior to the MBT), a classic disruptor of embryonic axis determination. Whole-mount immunolabeling and laser scanning confocal microscopy were used to localize β-catenin. The commercial GSK-3 Inhibitors as well as LiCl, dibutyl phthalate, fluorene and phenanthrene all induced an increase in the levels of nuclear β-catenin throughout the embryo, indicating that the morphological abnormalities were a result of disruption of Wnt/β-catenin signaling during dorsal-ventral axis specification. The ability of environmental chemicals to directly or indirectly target GSK-3β was assessed. Using Western blot analysis, the ability of these chemicals to affect enzymatic inhibitory phosphorylation at serine 9 on GSK-3β was examined, but no change in the serine phosphorylation state of GSK-3β was detected in exposed embryos. Furthermore, polycyclic aromatic hydrocarbons and dibutyl phthalate had no direct effect on the in vitro kinase activity of GSK-3β. While developmental abnormalities resulting from these axis-disrupting contaminants were linked to β-catenin accumulation in nuclei, the details of the disruption of this signaling pathway remain unknown. Since phenanthrene and fluorene as well as other hydrocarbons have been shown to disrupt axial development in sea urchin embryos, and since axis determination and the Wnt/β-catenin signaling pathway are highly conserved, we propose that these environmental contaminants may impact embryo development through a similar mechanism across phyla.
Collapse
Affiliation(s)
- Elise A Fairbairn
- University of California Davis, Bodega Marine Laboratory, Bodega Bay, CA 94923, USA.
| | | | | |
Collapse
|
36
|
Ren DE, Smith JA. Evaluation of environmental impacts of two common restoration methodologies for pipes that convey stormwater runoff. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2012; 89:557-562. [PMID: 22820681 DOI: 10.1007/s00128-012-0742-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Accepted: 07/10/2012] [Indexed: 06/01/2023]
Abstract
This study investigated the environmental impact of two commercial stormwater pipe-repair technologies (Ultraliner and Troliner). These technologies use liners believed to contain three plasticizers of potential environmental concern: bisphenol A (BPA), di-(2-ethylhexyl) phthalate (DEHP), and benzyl butyl phthalate (BBP). The release of these two products was investigated both experimentally and mathematically. Kinetic batch experiments were conducted to determine if contaminants were leaching from Ultraliner, Troliner, and the grout (used with Troliner) into water. In all cases for all incubation times up to 48 h, none of the three plasticizers were detected in water in contact with any of the pipe-repair materials. A generic GC-FID scan did not detect any unidentified compounds relative to control samples. In addition, a mathematical model of plasticizer leaching from the pipe-liner material was developed. Under various pipe geometries, simulated aqueous concentrations of the plasticizers were less than regulatory limits.
Collapse
Affiliation(s)
- Dianjun E Ren
- Department of Civil and Environmental Engineering, University of Virginia, Charlottesville, VA 22904-4742, USA
| | | |
Collapse
|
37
|
Hsieh TH, Tsai CF, Hsu CY, Kuo PL, Hsi E, Suen JL, Hung CH, Lee JN, Chai CY, Wang SC, Tsai EM. n-Butyl benzyl phthalate promotes breast cancer progression by inducing expression of lymphoid enhancer factor 1. PLoS One 2012; 7:e42750. [PMID: 22905168 PMCID: PMC3414447 DOI: 10.1371/journal.pone.0042750] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2011] [Accepted: 07/12/2012] [Indexed: 11/30/2022] Open
Abstract
Environmental hormones play important roles in regulating the expression of genes involved in cell proliferation, drug resistance, and breast cancer risk; however, their precise role in human breast cancer cells during cancer progression remains unclear. To elucidate the effect of the most widely used industrial phthalate, n-butyl benzyl phthalate (BBP), on cancer progression, we evaluated the results of BBP treatment using a whole human genome cDNA microarray and MetaCore software and selected candidate genes whose expression was changed by more than ten-fold by BBP compared with controls to analyze the signaling pathways in human breast cancer initiating cells (R2d). A total of 473 genes were upregulated, and 468 were downregulated. Most of these genes are involved in proliferation, epithelial-mesenchymal transition, and angiogenesis signaling. BBP induced the viability, invasion and migration, and tube formation in vitro, and Matrigel plug angiogenesis in vivo of R2d and MCF-7. Furthermore, the viability and invasion and migration of these cell lines following BBP treatment was reduced by transfection with a small interfering RNA targeting the mRNA for lymphoid enhancer-binding factor 1; notably, the altered expression of this gene consistently differentiated tumors expressing genes involved in proliferation, epithelial-mesenchymal transition, and angiogenesis. These findings contribute to our understanding of the molecular impact of the environmental hormone BBP and suggest possible strategies for preventing and treating human breast cancer.
Collapse
Affiliation(s)
- Tsung-Hua Hsieh
- Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Cheng-Fang Tsai
- Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chia-Yi Hsu
- Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Po-Lin Kuo
- Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Center of Excellence for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Edward Hsi
- Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jau-Ling Suen
- Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-Hsing Hung
- Department of Pediatrics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jau-Nan Lee
- Center of Excellence for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chee-Yin Chai
- Center of Excellence for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Pathology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Shao-Chun Wang
- Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States of America
| | - Eing-Mei Tsai
- Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Center of Excellence for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
- Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
- * E-mail:
| |
Collapse
|
38
|
Li JH, Ko YC. Plasticizer incident and its health effects in Taiwan. Kaohsiung J Med Sci 2012; 28:S17-21. [PMID: 22871596 DOI: 10.1016/j.kjms.2012.05.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Accepted: 03/15/2012] [Indexed: 11/27/2022] Open
Abstract
The May 23, 2011, plasticizer incident was one of the most serious food safety issues that ever occurred in Taiwan. Most, if not all, plasticizer-contaminated food items were due to malicious replacement of palm oil with phthalate plasticizer(s) in the cloudy-agent formulas by two upstream manufacturers. The incumbent agencies in Taiwan took necessary actions to minimize the harm caused by the incident and to ease the panic of the general public. In this paper, the incident was briefly reviewed and the situations of phthalate exposure in general public and pregnant women were assessed. Subsequently, the associations between phthalates exposure and the adverse health effects, such as shortened anogenital distance in baby boys, premature thelarche in young girls, endometriosis, adenomyosis, and leiomyoma in women, and decreased semen quality in men, were discussed. Food safety issue has become a worldwide concern and early detection of potential new toxicants in the foods is indispensable. Therefore, it is imperative to establish an international network for early warning or sentinel on food safety.
Collapse
Affiliation(s)
- Jih-Heng Li
- School of Pharmacy and Ph.D. Program in Toxicology, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | | |
Collapse
|
39
|
Hsieh TH, Tsai CF, Hsu CY, Kuo PL, Lee JN, Chai CY, Hou MF, Chang CC, Long CY, Ko YC, Tsai EM. Phthalates stimulate the epithelial to mesenchymal transition through an HDAC6-dependent mechanism in human breast epithelial stem cells. Toxicol Sci 2012; 128:365-76. [PMID: 22552774 DOI: 10.1093/toxsci/kfs163] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Phthalates are environmental hormone-like molecules that are associated with breast cancer risk and are involved in metastasis, a process that requires the epithelial-mesenchymal transition (EMT). However, few studies have addressed the potential effects of phthalates on stem cells. Here we tested the hypothesis that phthalates such as butyl benzyl phthalate and di-n-butyl phthalate induce EMT in R2d cells, a stem cell-derived human breast epithelial cell line that is responsive to estradiol for tumor development. We observed that phthalates induced EMT as evidenced by morphological changes concomitant with increased expression of mesenchymal markers and decreased expression of epithelial markers. Molecular mechanism studies revealed that histone deacetylase 6 (HDAC6) is required for phthalate-induced cell migration and invasion during EMT in vitro and metastasis into the lungs of nude mice. We also constructed a series of mutant HDAC6 promoter fragments and found that the transcription factor AP-2a plays a novel role in regulating the HDAC6 promoter. Furthermore, phthalates stimulated estrogen receptors and triggered the downstream EGFR-PKA signaling cascade, leading to increased expression of AP-2a in the nucleus. We also observed that phthalates increased expression of the PP1/HDAC6 complex and caused Akt activation and GSK3β inactivation, leading to transcriptional activation of vimentin through the β-catenin-TCF-4/LEF1 pathway. Understanding the signaling cascades of phthalates that activate EMT through HDAC6 in breast epithelial stem cells provides the identification of novel therapeutic target for human breast cancer.
Collapse
Affiliation(s)
- Tsung-Hua Hsieh
- Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Spezielle Arzneimitteltherapie in der Schwangerschaft. ARZNEIMITTEL IN SCHWANGERSCHAFT UND STILLZEIT 2012. [PMCID: PMC7271212 DOI: 10.1016/b978-3-437-21203-1.10002-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
41
|
Barros ACSDD, Sampaio MDCM. Gynecomastia: physiopathology, evaluation and treatment. SAO PAULO MED J 2012; 130:187-97. [PMID: 22790552 PMCID: PMC10876201 DOI: 10.1590/s1516-31802012000300009] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 07/11/2011] [Accepted: 12/27/2011] [Indexed: 11/21/2022] Open
Abstract
Gynecomastia (GM) is characterized by enlargement of the male breast, caused by glandular proliferation and fat deposition. GM is common and occurs in adolescents, adults and in old age. The aim of this review is to discuss the pathophysiology, etiology, evaluation and therapy of GM. A hormonal imbalance between estrogens and androgens is the key hallmark of GM generation. The etiology of GM is attributable to physiological factors, endocrine tumors or dysfunctions, non-endocrine diseases, drug use or idiopathic causes. Clinical evaluation must address diagnostic confirmation, search for an etiological factor and classify GM into severity grades to guide the treatment. A proposal for tailored therapy is presented. Weight loss, reassurance, pharmacotherapy with tamoxifen and surgical correction are the therapeutic options. For long-standing GM, the best results are generally achieved through surgery, combining liposuction and mammary adenectomy.
Collapse
|
42
|
Identification of estrogenic genes responding to phthalate esters treatment in human MCF-7 cells. Mol Cell Toxicol 2011. [DOI: 10.1007/s13273-011-0022-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
43
|
Aoki KAA, Harris CA, Katsiadaki I, Sumpter JP. Evidence suggesting that di-n-butyl phthalate has antiandrogenic effects in fish. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2011; 30:1338-1345. [PMID: 21337613 DOI: 10.1002/etc.502] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Revised: 10/04/2010] [Accepted: 12/13/2010] [Indexed: 05/30/2023]
Abstract
Phthalate ester plasticizers are antiandrogenic in mammals. High doses of certain phthalates consistently interfere with the normal development of male offspring exposed in utero, causing disrupted sperm production, abnormal development of the genitalia, and in some cases infertility. In the environment, phthalates are considered ubiquitous and are commonly measured in aquatic ecosystems at low nanograms to micrograms per liter concentrations. Given the similarity between mammalian and teleost endocrine systems, phthalate esters may be able to cause antiandrogenic endocrine disruption in fish in the wild. In the present study, adult male three-spined sticklebacks (Gasterosteus aculetaus; n = 8) were exposed to di-n-butyl phthalate (DBP; 0, 15, and 35 µg DBP/L) for 22 d and analyzed for changes in nesting behavior, plasma androgen concentrations, spiggin concentrations, and steroidogenic gene expression. Plasma testosterone concentrations were significantly higher in males from the 35 µg DBP/L group compared with the solvent control, whereas plasma 11-ketotestosterone concentrations were not significantly affected. Expression of steroid acute regulatory protein and 3β-hydroxysteroid dehydrogenase remained unchanged. Spiggin concentrations were significantly lower in the males exposed to 35 µg DBP/L. Nest building appeared to be slower in some males exposed to DBP, but this was not statistically significant. These results suggest that DBP has antiandrogenic effects in fish. However, further research is required to firmly establish the consequences of chronic DBP exposure in fish.
Collapse
Affiliation(s)
- Katherine A A Aoki
- Institute for the Environment, Brunel University, Uxbridge, Middlesex, United Kingdom.
| | | | | | | |
Collapse
|
44
|
Xu Q, Yin X, Shen Y, Zhang N, Wang M, Gu Z. Detection of Phthalate Esters in Environmental Water Samples -Comparison of Nylon6 Nanofibers Mat-based Solid Phase Extraction and Other Conventional Extraction Methods. CHINESE J CHEM 2011. [DOI: 10.1002/cjoc.201190124] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
45
|
Okamoto Y, Ueda K, Kojima N. Potential Risks of Phthalate Esters: Acquisition of Endocrine-disrupting Activity during Environmental and Metabolic Processing. ACTA ACUST UNITED AC 2011. [DOI: 10.1248/jhs.57.497] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Koji Ueda
- Faculty of Pharmacy, Meijo University
| | | |
Collapse
|
46
|
Zubair Alam M, Ahmad S, Ahmad M. Mutagenicity and genotoxicity of tannery effluents used for irrigation at Kanpur, India. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2010; 73:1620-1628. [PMID: 20684992 DOI: 10.1016/j.ecoenv.2010.07.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2009] [Revised: 05/11/2010] [Accepted: 07/11/2010] [Indexed: 05/29/2023]
Abstract
The tannery effluents at Kanpur (India) have been in use for irrigation since last many years, polluting soil directly while ground water and food crops indirectly. Gas chromatography-mass spectrometric analysis of the test samples revealed the presence of organic compounds including diisooctyl phthalate, phenyl N-methylcarbamate, dibutyl phthalate, bis 2-methoxyethyl phthalate, and higher alkanes. Tannery effluent extracts were prepared using XAD-4/8 resins, dichloromethane, chloroform, and hexane and tested with Ames Salmonella test and DNA repair-defective Escherichia coli K-12 mutants. In the presence of XAD-concentrated tannery effluent, TA98 found to be the most sensitive strain in terms of mutagenic index followed by TA97a whereas in terms of mutagenic potential TA102 was most responsive. The extracts were also found genotoxic as determined in terms of survival of E. coli K-12 mutants, suggesting the presence of DNA damaging compounds in the tannery effluents. In the light of results, precautious use of tannery effluents for irrigation is suggested.
Collapse
Affiliation(s)
- Mohammad Zubair Alam
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, India.
| | | | | |
Collapse
|
47
|
Wang X, Shang L, Wang J, Wu N, Wang S. Effect of phthalate esters on the secretion of prostaglandins (F2alpha and E2) and oxytocin in cultured bovine ovarian and endometrial cells. Domest Anim Endocrinol 2010; 39:131-6. [PMID: 20444570 DOI: 10.1016/j.domaniend.2010.03.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2010] [Revised: 03/21/2010] [Accepted: 03/21/2010] [Indexed: 11/30/2022]
Abstract
The influence of phthalate esters di-2-ethylhexyl phthalate (DEHP) and mono-2-ethylhexyl phthalate (MEHP) on uterine prostaglandin (PGF2alpha and PGE2) and ovarian oxytocin secretion was investigated. Endometrial, granulosa, and luteal cells from cows on days 8-12 of the estrous cycle were treated with DEHP or MEHP (0.1, 1, or 10 ng/mL). We found that DEHP and MEHP stimulated (P < 0.05) secretion of PGF2alpha and inhibited (P < 0.001) secretion of PGE2 from endometrial cells. The ratio of PGF2alpha to PGE2 was markedly altered. The endocrine disrupting chemicals also enhanced secretion of oxytocin (P < 0.05) from ovarian cells. Our results indicated that DEHP and its metabolite MEHP could affect the process of the estrous cycle by impairing secretion of prostaglandin from the uterus and oxytocin from the ovary.
Collapse
Affiliation(s)
- Xin Wang
- Department Gynecology and Obstetrics, Beijing Military Region Main Hospital, Dongcheng District, Beijing 100700, China
| | | | | | | | | |
Collapse
|
48
|
Abstract
Chemicals act on biological molecules and affect their functions. DNA is one of the most important targets, damaging of which could lead to diverse diseases including cancer. The mode of action of chemicals to DNA contains chemical reaction and protein factor-mediated modulation of the function. In this review, these actions are described in view of effects of chemicals on DNA. First, oxidative damage of DNA is described in several cases of chemicals focusing on its mechanisms involving metals such as copper. We have demonstrated: DNA binding of copper ions prior to reduction-oxidation reaction is crucial for the damaging, probably due to the proximal attack of reactive oxygen species; reduction of the bound copper induces a conformational change of DNA strand through rearrangement of copper-coordination geometry; RNA, another nucleic acid, is more liable to oxidative damage than DNA. Impact of RNA damage on oxidative stress-related diseases is discussed. Second, a group of chemicals called endocrine disruptors is described. Phthalate esters are ubiquitous endocrine disruptors of which mechanisms are still elusive. Here, we present our research performed for elucidation of the active metabolite and molecular target. Novel candidates of active metabolite are suggested. Finally, toxicological activity dynamics are described, showing several chemicals exert toxic potential by structural alteration in the environment, metabolism, or both. These imply gene-environment interactions that would underlie various diseases induced by environmental chemicals.
Collapse
Affiliation(s)
- Koji Ueda
- Faculty of Pharmacy, Meijo University, Nagoya, Japan.
| |
Collapse
|
49
|
Huang PC, Tsai EM, Li WF, Liao PC, Chung MC, Wang YH, Wang SL. Association between phthalate exposure and glutathione S-transferase M1 polymorphism in adenomyosis, leiomyoma and endometriosis. Hum Reprod 2010; 25:986-94. [PMID: 20147336 DOI: 10.1093/humrep/deq015] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Phthalates are known to have estrogenic effects in cell models and experimental animals. However, the evidence regarding the effects of phthalates on human reproduction is still limited. We conducted a case-control study to determine whether estrogen-dependent diseases are associated with phthalate exposure and how the glutathione S-transferase M1 (GSTM1; a major detoxification enzyme) genotype modulates the risk. METHODS We recruited subjects who underwent laparotomy and had pathologic confirmation of endometriosis (EN) (n = 28), adenomyosis (AD) (n = 16) and leiomyoma (LEI) (n = 36) from the Department of Obstetrics and Gynecology at a medical center in Taiwan between 2005 and 2007. Controls (n = 29) were patients without any of the three aforementioned gynecologic conditions. Urine samples were collected before surgery and analyzed for seven phthalate metabolites using liquid chromatography-tandem mass spectrometry. Peripheral lymphocytes were used for GSTM1 genotype determination. RESULTS Patients with LEIs had significantly higher levels of total urinary mono-ethylhexyl phthalate (SigmaMEHP; 52.1 versus 18.9 microg/g creatinine, P < 0.05) than the controls, whereas patients with EN had an increased level of urinary mono-n-butyl phthalate (94.1 versus 58.0 microg/g creatinine, P < 0.05). Subjects with GSTM1 null genotype had significantly increased odds for AD relative to those with GSTM1 wild genotype [odds ratio (OR) = 5.30; 95% CI, 1.22-23.1], even after adjustment for age and phthalate exposure. Subjects who carried the GSTM1 null genotype and had a high urinary level of SigmaMEHP showed a significantly increased risk for AD (OR = 10.4; 95% CI, 1.26-85.0) and LEIs (OR = 5.93; 95% CI, 1.10-31.9) after adjustment for age, compared with those with GSTM1 wild-type and low urinary level of SigmaMEHP. CONCLUSIONS These results suggest that both GSTM1 null and phthalate exposure are associated with AD and LEI. Larger studies are warranted to investigate potential interaction between GSTM1 null and phthalate exposure in the etiology of estrogen-dependent gynecologic conditions.
Collapse
Affiliation(s)
- Po-Chin Huang
- Division of Environmental Health and Occupational Medicine, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli County 350, Taiwan
| | | | | | | | | | | | | |
Collapse
|
50
|
Durmaz E, Ozmert EN, Erkekoglu P, Giray B, Derman O, Hincal F, Yurdakök K. Plasma phthalate levels in pubertal gynecomastia. Pediatrics 2010; 125:e122-9. [PMID: 20008419 DOI: 10.1542/peds.2009-0724] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVE Several untoward health effects of phthalates, which are a group of industrial chemicals with many commercial uses including personal-care products and plastic materials, have been defined. The most commonly used, di-(2-ethylhexyl)-phthalate (DEHP), is known to have antiandrogenic or estrogenic effects or both. Mono-(2-ethylhexyl)-phthalate (MEHP) is the main metabolite of DEHP. In this study, we aimed to determine the plasma DEHP and MEHP levels in pubertal gynecomastia cases. PATIENTS AND METHODS The study group comprised 40 newly diagnosed pubertal gynecomastia cases who were admitted to Hacettepe University Ihsan Doğramaci Children's Hospital. The control group comprised 21 age-matched children without gynecomastia or other endocrinologic disorder. Plasma DEHP and MEHP levels were measured by using high-performance liquid chromatography. Serum hormone levels were determined in some pubertal gynecomastia cases according to the physician's evaluation. RESULTS Plasma DEHP and MEHP levels were found to be statistically significantly higher in the pubertal gynecomastia group compared with the control group (P < .001) (DEHP, 4.66 +/- 1.58 and 3.09 +/- 0.90 microg/mL, respectively [odds ratio: 2.77 (95% confidence interval: 1.48-5.21)]; MEHP, 3.19 +/- 1.41 and 1.37 +/- 0.36 microg/mL [odds ratio: 24.76 (95% confidence interval: 3.5-172.6)]). There was a statistically significant correlation between plasma DEHP and MEHP levels (r: 0.58; P < .001). In the pubertal gynecomastia group, no correlation could be determined between plasma DEHP and MEHP levels and any of the hormone levels. CONCLUSIONS DEHP, which has antiandrogenic or estrogenic effects, may be an etiologic factor in pubertal gynecomastia. These results may pioneer larger-scale studies on the etiologic role of DEHP in pubertal gynecomastia.
Collapse
Affiliation(s)
- Erdem Durmaz
- Department of Pediatrics, Hacettepe University, Ankara, Turkey
| | | | | | | | | | | | | |
Collapse
|