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Su BD, Li XM, Huang ZW, Wang Y, Shao J, Xu YY, Shu LX, Li YB. Development and application of the physiologically-based toxicokinetic (PBTK) model for ochratoxin A (OTA) in rats and humans. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 276:116277. [PMID: 38604061 DOI: 10.1016/j.ecoenv.2024.116277] [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: 08/23/2023] [Revised: 03/15/2024] [Accepted: 03/29/2024] [Indexed: 04/13/2024]
Abstract
Ochratoxin A (OTA) is a common fungal toxin frequently detected in food and human plasma samples. Currently, the physiologically based toxicokinetic (PBTK) model plays an active role in dose translation and can improve and enhance the risk assessment of toxins. In this study, the PBTK model of OTA in rats and humans was established based on knowledge of OTA-specific absorption, distribution, metabolism, and excretion (ADME) in order to better explain the disposition of OTA in humans and the discrepancies with other species. The models were calibrated and optimized using the available kinetic and toxicokinetic (TK) data, and independent test datasets were used for model evaluation. Subsequently, sensitivity analyses and population simulations were performed to characterize the extent to which variations in physiological and specific chemical parameters affected the model output. Finally, the constructed models were used for dose extrapolation of OTA, including the rat-to-human dose adjustment factor (DAF) and the human exposure conversion factor (ECF). The results showed that the unbound fraction (Fup) of OTA in plasma of rat and human was 0.02-0.04% and 0.13-4.21%, respectively. In vitro experiments, the maximum enzyme velocity (Vmax) and Michaelis-Menten constant (Km) of OTA in rat and human liver microsomes were 3.86 and 78.17 μg/g min-1, 0.46 and 4.108 μg/mL, respectively. The predicted results of the model were in good agreement with the observed data, and the models in rats and humans were verified. The PBTK model derived a DAF of 0.1081 between rats and humans, whereas the ECF was 2.03. The established PBTK model can be used to estimate short- or long-term OTA exposure levels in rats and humans, with the capacity for dose translation of OTA to provide the underlying data for risk assessment of OTA.
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Affiliation(s)
- Bu-Da Su
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Xiao-Meng Li
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Zhi-Wei Huang
- Phase Ⅰ Clinical Research Center, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yue Wang
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Jia Shao
- Department of Pharmacy, Tianjin First Central Hospital, Tianjin 300192, China
| | - Yan-Yan Xu
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
| | - Le-Xin Shu
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
| | - Yu-Bo Li
- Tianjin State Key Laboratory of Modern Chinese Medicine, School of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China.
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Ahmed RYS, Tanoue R, Chen X, Kawai YK, Kubota A. Assessment of developmental toxicity and the potential mode of action underlying single and binary exposure to estrogenic endocrine disrupting chemicals in zebrafish (Danio rerio). Comp Biochem Physiol C Toxicol Pharmacol 2024; 277:109821. [PMID: 38128895 DOI: 10.1016/j.cbpc.2023.109821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 11/28/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023]
Abstract
The current study investigated the effect of single and binary exposure to distinct xenoestrogens, including diethylstilbestrol (DES) and zearalenone (ZEN), on zebrafish embryos subjected to continuous exposure for 4 days starting from 4 h post fertilization. Noteworthy impact on cumulative mortality, hatchability, spinal and tail curvature, pericardial edema, and reduction in blood circulation were observed in DES-treated embryos, with lower incidence and intensity shown for ZEN at the same nominal concentration (3 μM). An interactive effect was seen for the combined exposure to DES and ZEN, in which deformities and circulatory failure mediated by DES were mitigated by co-treatment with low concentrations of ZEN. Similarly, ZEN-induced spinal and tail curvature, pericardial edema, and blood flow reduction declined dramatically following DES co-exposure at low concentrations. A significant counteracting effect has been observed against DES- and ZEN-induced developmental anomalies following co-treatment with an estrogen receptor (ER) antagonist, fulvestrant (FUL). The assessment of the aromatase gene (CYP19A1b) showed that DES strongly upregulated mRNA expression of CYP19A1b with a lower EC50 (1.1 × 10-3 nM) than a natural estrogen, 17β-estradiol (2.5 nM). Similarly, ZEN induced CYP19A1b mRNA expression with an EC50 of 57 nM. Exposure to 10 or 20 μM FUL inhibited the expression of CYP19A1b induced by a single treatment of DES or ZEN. Overall, the competitive action against ER could be the main mechanism underlying the developmental toxicity induced by DES and ZEN.
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Affiliation(s)
- Rehab Youssef Salama Ahmed
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan; Department of Poultry Diseases, Veterinary Medicine, Aswan University, Aswan 097-81528, Egypt
| | - Rumi Tanoue
- Center for Marine Environmental Studies, Ehime University, Matsuyama, Ehime 790-8577, Japan
| | - Xing Chen
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan
| | - Yusuke K Kawai
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan
| | - Akira Kubota
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan.
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Lee H, Park J, Park K. Mixture Effects of Bisphenol A and Its Structural Analogs on Estrogen Receptor Transcriptional Activation. TOXICS 2023; 11:986. [PMID: 38133387 PMCID: PMC10747781 DOI: 10.3390/toxics11120986] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/15/2023] [Accepted: 11/30/2023] [Indexed: 12/23/2023]
Abstract
Bisphenol A (BPA) exposure has been widely linked to endocrine-disrupting effects. Recently, many substitutes for BPA have been developed as safe structural analogs. However, they have still been reported to have similar adverse effects. The current study evaluated the effects of bisphenol A and eight structural analogs on the transcription of estrogen receptor alpha (ERα). The effects of binary and ternary mixtures prepared from different combinations of BPA analogs were also evaluated for transcription activity. The measured data of the mixtures were compared to the predicted data obtained by the full logistic model, and the model deviation ratio (MDR) was calculated to determine whether the effects were synergistic, antagonistic, or additive. Overall, the results suggest that the effect of bisphenol compound are additive in binary and ternary mixtures.
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Affiliation(s)
| | | | - Kwangsik Park
- College of Pharmacy, Dongduk Women’s University, Seoul 02748, Republic of Korea
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Durcik M, Grobin A, Roškar R, Trontelj J, Peterlin Mašič L. Estrogenic potency of endocrine disrupting chemicals and their mixtures detected in environmental waters and wastewaters. CHEMOSPHERE 2023; 330:138712. [PMID: 37068617 DOI: 10.1016/j.chemosphere.2023.138712] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 04/03/2023] [Accepted: 04/14/2023] [Indexed: 05/14/2023]
Abstract
Endocrine disrupting chemicals such as natural and synthetic steroid hormones and bisphenols are among the most important pollutants in the aquatic environment. We performed an environmental chemical analysis of five Slovenian water samples, two rivers, one groundwater, and the influent and effluent of wastewater treatment plants, with a highly sensitive analysis of twenty-five endocrine-disrupting compounds belonging to the groups of natural hormones, synthetic hormones, and bisphenols. Since these compounds are simultaneously present in the environment, it is important to study their individual effects as well as the effects of mixtures. We investigated in vitro the estrogenic potency of selected natural and synthetic steroid hormones and bisphenols detected in surface, ground and waste water in Slovenia using the OECD-validated transactivation assay on the cell line Hela9903. We predicted their mixture effects using the concentration addition model and compared them with experimentally determined values. Two mixing designs were used: a balanced design in which chemicals were combined in proportion to their individual EC50 values, and an unbalanced design with compounds in proportion to their measured concentrations in the environmental samples. The estrogenic effects of the experimental mixtures followed the concentration addition model. Real water samples exhibited weaker estrogenic effects, showing the great heterogeneity of the real water samples.
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Affiliation(s)
- Martina Durcik
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Andrej Grobin
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Robert Roškar
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Jurij Trontelj
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, 1000, Ljubljana, Slovenia.
| | - Lucija Peterlin Mašič
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, 1000, Ljubljana, Slovenia.
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Penserini L, Cantoni B, Vries D, Turolla A, Smeets PWMH, Bokkers BGH, Antonelli M. Quantitative chemical risk assessment for mixtures: Application to alkylphenol mixtures and phthalate mixtures in tap and bottled water. ENVIRONMENT INTERNATIONAL 2022; 165:107294. [PMID: 35623187 DOI: 10.1016/j.envint.2022.107294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 04/14/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
The occurrence and hazard risks of mixtures of Contaminants of Emerging Concern (CECs) in drinking water (DW) lead to serious consideration regarding the possible impacts on public health. Consequently, there is ongoing research, development and empowerment of risk assessment procedures to get more toxicological insight. For instance, alkylphenols and phthalates have been frequently reported to be present both in bottled and tap water, affecting different human endpoints. Currently, deterministic chemical risk assessment (CRA) is used to evaluate the compounds' mixture health risk. However, CRA deals just qualitatively with sources of uncertainty, which may lead to erroneous assessment of risks. Here, a new procedure for quantitative chemical risk assessment of CEC mixtures (QCRAMIX) is proposed. Its potential is illustrated by a case study where the risks related to the presence of mixtures of alkylphenols or phthalates in tap versus bottled DW are compared. Uncertainties in both exposure and hazard assessment steps of the procedure are included to calculate a probabilistic mixture Benchmark Quotient (BQMIX). The QCRAMIX procedure highlighted the non-negligible health risks posed by those compounds in both DW sources based on overall water consumption. In fact, DW consumers' behaviour in 13 different countries, in terms of total DW consumption and fraction of bottled and tap water consumed, were considered to evaluate the influence on health risk. For alkylphenols, the total water consumption was found to be the most relevant factor in increasing the health risk, while for phthalates the risk was found to be mainly influenced by the percentage of bottled water consumed. Hence, the proposed QCRAMIX procedure can be a valuable tool for prioritization of CECs to be included in DW regulations which aim to minimize the overall risk, accounting for actual DW consumption.
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Affiliation(s)
- Luca Penserini
- Politecnico Milano, Department of Civil and Environmental Engineering (DICA) - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Beatrice Cantoni
- Politecnico Milano, Department of Civil and Environmental Engineering (DICA) - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | - Dirk Vries
- KWR, Groningenhaven 7, 3433 PE Nieuwegein, The Netherlands
| | - Andrea Turolla
- Politecnico Milano, Department of Civil and Environmental Engineering (DICA) - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
| | | | - Bas G H Bokkers
- National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands
| | - Manuela Antonelli
- Politecnico Milano, Department of Civil and Environmental Engineering (DICA) - Environmental Section, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
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Russo G, Laneri S, Di Lorenzo R, Neri I, Dini I, Ciampaglia R, Grumetto L. Monitoring of Pollutants Content in Bottled and Tap Drinking Water in Italy. Molecules 2022; 27:molecules27133990. [PMID: 35807230 PMCID: PMC9268051 DOI: 10.3390/molecules27133990] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 11/16/2022] Open
Abstract
The concentration levels of thirteen organic pollutants and selected heavy metals were investigated in 40 plastics bottled and tap water samples. Some of the selected contaminants have an ascertained or suspected endocrine disrupting activity, such as Bisphenol A (BPA) and its analogs, and Bis 2-ethylhexyl phthalate (DEHP), which are used by industries as plasticizers. The most frequently detected pollutants were Bisphenol AF (BPAF) (detection frequency (DF) = 67.5%, mean 387.21 ng L−1), DEHP (DF = 62.5%, mean 46.19 µg L−1) and BPA (DF = 60.0%, mean 458.57 ng L−1), with higher concentration levels found in tap waters. Furthermore, a possible level of exposure to thirteen pollutants via drinking water intake was calculated. Our findings show that, even though the occurrence of contaminants and heavy metals in drinking waters does not pose an immediate, acute health risk for the population, their levels should be constantly monitored and “hard-wired” into everyday practice. Indeed, the health impact to the continuous and simultaneous intake of a huge variety of xenobiotics from various sources by humans is complex and still not fully understood.
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Affiliation(s)
- Giacomo Russo
- School of Applied Sciences, Sighthill Campus, Edinburgh Napier University, 9 Sighthill Ct, Edinburgh EH11 4BN, UK;
| | - Sonia Laneri
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Via D. Montesano, 49, I-80131 Naples, Italy; (S.L.); (R.D.L.); (I.N.); (I.D.); (R.C.)
| | - Ritamaria Di Lorenzo
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Via D. Montesano, 49, I-80131 Naples, Italy; (S.L.); (R.D.L.); (I.N.); (I.D.); (R.C.)
| | - Ilaria Neri
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Via D. Montesano, 49, I-80131 Naples, Italy; (S.L.); (R.D.L.); (I.N.); (I.D.); (R.C.)
| | - Irene Dini
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Via D. Montesano, 49, I-80131 Naples, Italy; (S.L.); (R.D.L.); (I.N.); (I.D.); (R.C.)
| | - Roberto Ciampaglia
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Via D. Montesano, 49, I-80131 Naples, Italy; (S.L.); (R.D.L.); (I.N.); (I.D.); (R.C.)
| | - Lucia Grumetto
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, Via D. Montesano, 49, I-80131 Naples, Italy; (S.L.); (R.D.L.); (I.N.); (I.D.); (R.C.)
- Consorzio Interuniversitario IIstituto Nazionale di Biostrutture e Biosistemi, Viale Medaglie d’Oro, 305, I-00136 Rome, Italy
- Correspondence: ; Tel.: +39-(081)-678628
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7
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Oliveira KMGD, Carvalho EHDS, Santos Filho RD, Sivek TW, Thá EL, Souza IRD, Coelho LDDS, Pimenta MEB, Oliveira GARD, Oliveira DPD, Cestari MM, Leme DM. Single and mixture toxicity evaluation of three phenolic compounds to the terrestrial ecosystem. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 296:113226. [PMID: 34252852 DOI: 10.1016/j.jenvman.2021.113226] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 06/26/2021] [Accepted: 07/03/2021] [Indexed: 06/13/2023]
Abstract
Endocrine-disrupting chemicals (EDCs) are primarily studied regarding endocrine-mediated effects in mammals and fish. However, EDCs can cause toxicity by mechanisms outside the endocrine system, and, as they are released continuously into soils, they may pose risks to terrestrial organisms. In this work, the plant Allium cepa and the earthworm Eisenia foetida were used as test systems to evaluate the toxicity and cyto-/geno-toxicity of three environmental phenols known as EDCs (Bisphenol A - BPA, Octylphenol - OP, Nonylphenol - NP). The tested phenols were evaluated in environmentally relevant concentrations (μg/L) and in single forms and mixture. BPA, OP, and NP did not inhibit the seed germination and root development in A. cepa in their single forms and mixture. However, all single forms of the tested phenols caused cellular and DNA damages in A. cepa, and although these effects persist in the mixtures, the effects were verified at lower levels. These phenols caused acute toxicity to E. foetida after 48 h of exposure and at both conditions evaluated (single forms and mixture); however, unlike A. cepa, in earthworms, mixtures and single forms presented the same level of effects, indicating that interspecies physiological different might influence the mixture toxicity. In summary, our results suggest that BPA, OP, and NP are toxicants to earthworm and cyto-/geno-toxicants to monocotyledonous plants at low concentrations. However, interaction among these phenols reduces the magnitude of their individual effects (antagonistic effect) in the plant test system. Therefore, this study draws attention to the need to raise knowledge about the ecotoxicity of phenolic compounds to help predict their ecological risks and protect non-target terrestrial species.
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Affiliation(s)
- Ketelen Michele Guilherme de Oliveira
- Graduate Program in Genetics, Departament of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, PR, Brazil
| | | | - Ronaldo Dos Santos Filho
- Graduate Program in Genetics, Departament of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, PR, Brazil
| | - Tainá Wilke Sivek
- Graduate Program in Genetics, Departament of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, PR, Brazil
| | - Emanoela Lundgren Thá
- Graduate Program in Genetics, Departament of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, PR, Brazil
| | - Irisdoris Rodrigues de Souza
- Graduate Program in Genetics, Departament of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, PR, Brazil
| | - Lauren Dalat de Sousa Coelho
- Faculty of Pharmacy, Federal University of Goiás (UFG), Environmental Toxicology Research Laboratory (EnvTox), Goiânia, GO, Brazil
| | - Maria Eunice Bertelli Pimenta
- Faculty of Pharmacy, Federal University of Goiás (UFG), Environmental Toxicology Research Laboratory (EnvTox), Goiânia, GO, Brazil
| | - Gisele Augusto Rodrigues de Oliveira
- Faculty of Pharmacy, Federal University of Goiás (UFG), Environmental Toxicology Research Laboratory (EnvTox), Goiânia, GO, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Institute of Chemistry, Araraquara, SP, Brazil
| | - Danielle Palma de Oliveira
- Faculty of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo (USP), Ribeirão Preto, SP, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Institute of Chemistry, Araraquara, SP, Brazil
| | - Marta Margarete Cestari
- Graduate Program in Genetics, Departament of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, PR, Brazil
| | - Daniela Morais Leme
- Graduate Program in Genetics, Departament of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, PR, Brazil; National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM), Institute of Chemistry, Araraquara, SP, Brazil.
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8
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Hunter D, Heng K, Mann N, Anand-Ivell R, Ivell R. Maternal Exposure to Dibutyl Phthalate (DBP) or Diethylstilbestrol (DES) Leads to Long-Term Changes in Hypothalamic Gene Expression and Sexual Behavior. Int J Mol Sci 2021; 22:ijms22084163. [PMID: 33920546 PMCID: PMC8073651 DOI: 10.3390/ijms22084163] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 02/07/2023] Open
Abstract
Xenobiotic exposure during pregnancy and lactation has been linked to perinatal changes in male reproductive outcomes and other endocrine parameters. This pilot study wished to assess whether brief maternal exposure of rats to xenobiotics dibutyl phthalate (DBP) or diethylstilbestrol (DES) might also cause long-term changes in hypothalamic gene expression or in reproductive behavior of the resulting offspring. Time-mated female Sprague Dawley rats were given either DBP (500 mg/kg body weight, every second day from GD14.5 to PND6), DES (125 µg/kg body weight at GD14.5 and GD16.5 only), or vehicle (n = 8–12 per group) and mild endocrine disruption was confirmed by monitoring postnatal anogenital distance. Hypothalamic RNA from male and female offspring at PND10, PND24 and PND90 was analyzed by qRT-PCR for expression of aromatase, oxytocin, vasopressin, ER-alpha, ER-beta, kisspeptin, and GnRH genes. Reproductive behavior was monitored in male and female offspring from PND60 to PND90. Particularly, DES treatment led to significant changes in hypothalamic gene expression, which for the oxytocin gene was still evident at PND90, as well as in sexual behavior. In conclusion, maternal xenobiotic exposure may not only alter endocrine systems in offspring but, by impacting on brain development at a critical time, can have long-term effects on male or female sexual behavior.
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Kagawa N, Nagao T. Maternal administration of bisphenol A alters the microglial profile in the neocortex of mouse weanlings. Congenit Anom (Kyoto) 2020; 60:142-146. [PMID: 32223001 DOI: 10.1111/cga.12370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 03/23/2020] [Accepted: 03/24/2020] [Indexed: 12/12/2022]
Abstract
Bisphenol A (BPA) is known to cause abnormal neurogenesis in the developing neocortex. The mechanisms of BPA toxicity concerning neuroinflammatory-related endpoints are incompletely characterized. To evaluate the microglial morphology and the gene expression of pro-inflammatory cytokines in the newborn neocortex, ICR mice were exposed to BPA 200 μg/kg/d on gestational day 6 through post-partum day 21. Weanlings exposed during prenatal and postnatal period to BPA showed an increased number of amoeboid-type microglia, a microglial differentiation disruption (the M1/M2 microglial ratio), and an abnormal expression of genes encoding pro-inflammatory factors. These findings suggest that the well-known neurodevelopmental toxicity of BPA may be related to an increased microglial activation and neuroinflammation in the neocortex.
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Affiliation(s)
- Nao Kagawa
- Department of Life Science, Kindai University, Osaka, Japan
| | - Tetsuji Nagao
- Department of Life Science, Kindai University, Osaka, Japan
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10
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Oncogenic Potential of Bisphenol A and Common Environmental Contaminants in Human Mammary Epithelial Cells. Int J Mol Sci 2020; 21:ijms21103735. [PMID: 32466334 PMCID: PMC7279350 DOI: 10.3390/ijms21103735] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/16/2020] [Accepted: 05/19/2020] [Indexed: 12/24/2022] Open
Abstract
There is an ample epidemiological evidence to support the role of environmental contaminants such as bisphenol A (BPA) in breast cancer development but the molecular mechanisms of their action are still not fully understood. Therefore, we sought to analyze the effects of three common contaminants (BPA; 4-tert-octylphenol, OP; hexabromocyclododecane, HBCD) on mammary epithelial cell (HME1) and MCF7 breast cancer cell line. We also supplied some data on methoxychlor, MXC; 4-nonylphenol, NP; and 2-amino-1-methyl-6-phenylimidazo [4–b] pyridine, PhIP. We focused on testing the prolonged (two months) exposure to low nano-molar concentrations (0.0015–0.0048 nM) presumed to be oncogenic and found that they induced DNA damage (evidenced by upregulation of pH2A.X, pCHK1, pCHK2, p-P53) and disrupted the cell cycle. Some agents induced epigenetic (methylation) changes of tumor suppressor genes TIMP3, CHFR, ESR1, IGSF4, CDH13, and GSTP1. Obviously, the accumulation of these molecular alterations is an essential base for cancer development. Consistent with this, we observed that these agents increased cellular invasiveness through collagen. Cellular abilities to form colonies in soft agar were increased for MCF7. Toxic agents induced phosphorylation of protein kinase such as EGFR, CREB, STAT6, c-Jun, STAT3, HSP6, HSP27, AMPKα1, FAK, p53, GSK-3α/β, and P70S6 in HME1. Most of these proteins are involved in potential oncogenic pathways. Overall, these data clarify the molecular alterations that can be induced by some common environmental contaminants in mammary epithelial cells which could be a foundation to understand environmental carcinogenesis.
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Kim YB, Cheon YP, Lee SH. Adverse Effect of Nonylphenol on the Reproductive System in F1 Male Mice: A Subchronic Low-Dose Exposure Model. Dev Reprod 2019; 23:93-99. [PMID: 31321349 PMCID: PMC6635614 DOI: 10.12717/dr.2019.23.2.093] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 04/21/2019] [Accepted: 05/02/2019] [Indexed: 01/01/2023]
Abstract
Nonylphenols (NPs) are widely used industrial materials, and are considered as
potent endocrine disrupting chemical. Present study was undertaken to clarify
the effect of subchronic low-dose NP exposure to F1 generation male mice. Mice
were divided into 2 groups; (1) CON, control animals and (2) NP-50 (50
μg/L), animals were treated with NP via drinking water. NP exposures were
continuously conducted from parental pre-mating period until the postnatal day
(PND) 55 of F1 offsprings. Mice were sacrificed on PND 55 and the tissue weights
were measured. The initial body weights (at PND 21) and terminal body weights
(PND 55) of the NP-50 animals were significantly lower than those of control
animals (p<0.05). NP exposure induced a significant
increase in the absolute weight of the testes (p<0.05).
Conversely, the NP exposure caused significant decrease in the absolute weights
of the epididymis (p<0.01), prostate
(p<0.05) and seminal vesicle
(p<0.05). Histopathological studies revealed that
NP-treated animals exerted decreased seminiferous tubule diameters, reduced
luminal area, and lower number of germ cells. Also some sloughing morphologies
in the tubules were observed. In the caudal epididymis, fewer mature sperms and
swollen epithelial cells were found in the NP-treated group. Our results
confirmed that the subchronic low-dose NP exposure altered some male parameters
and induced histopathological abnormalities in testis and epididymis of F1 mice.
Since the NP dose used in this study is close to the average human daily NP
exposure, our results could provide practically meaningful understanding of
adverse effect of EDC in human.
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Affiliation(s)
- Yong-Bin Kim
- Dept. of Biotechnology, Sangmyung University, Seoul 03016, Korea
| | - Yong-Pil Cheon
- Division of Developmental Biology and Physiology, School of Biological Sciences and Chemistry, Sungshin University, Seoul 02844, Korea
| | - Sung-Ho Lee
- Dept. of Biotechnology, Sangmyung University, Seoul 03016, Korea
| |
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