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Souza DND, Mounteer AH, Arcanjo GS. Estrogenic compounds in drinking water: A systematic review and risk analysis. CHEMOSPHERE 2024; 360:142463. [PMID: 38821126 DOI: 10.1016/j.chemosphere.2024.142463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 05/09/2024] [Accepted: 05/25/2024] [Indexed: 06/02/2024]
Abstract
Estrogenic compounds are the endocrine disruptors that receive major attention because of their ability to imitate the natural female hormone, 17β-estradiol and cause adverse effects on the reproductive system of animals. The presence of estrogenic compounds in drinking water is a warning to assess the risks to which human beings are exposed. The present work has the objectives of carrying out a systematic review of studies that investigated estrogenic compounds in drinking water around the world and estimate the human health and estrogenic activity risks, based on the concentrations of each compound reported. The systematic review returned 505 scientific papers from the Web of Science®, SCOPUS® and PubMED® databases and after careful analysis, 45 papers were accepted. Sixteen estrogenic compounds were identified in drinking water, from the classes of hormones, pharmaceutical drugs and personal care products, plasticizers, corrosion inhibitors, pesticides and surfactants. Di-(2-ethylhexyl) phthalate (DEHP) was the compound found at the highest concentration, reaching a value of 1.43 mg/L. Non-carcinogenic human health risk was classified as high for 17α-ethynilestradiol and DEHP, medium for dibutyl phthalate, and low for bisphenol A. The estrogenic activity risks were negligible for all the compounds, except DEHP, with a low risk. None of the estrogenic compounds presented an unacceptable carcinogenic risk, due to estrogenic activity. However, the risk assessment did not evaluate the interactions between compounds, that occurs in drinking water and can increase the risks and adverse effects to human health. Nonetheless, this study demonstrates the need for improvement of drinking water treatment plants, with more efficient technologies for micropollutant removal.
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Affiliation(s)
- Deisi N de Souza
- Programa de Pós-Graduação em Meio Ambiente, Águas e Saneamento, Departamento de Engenharia Ambiental, Universidade Federal da Bahia, 40210-630, Salvador, BA, Brazil
| | - Ann H Mounteer
- Programa de Pós-Graduação em Engenharia Civil, Departamento de Engenharia Civil, Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil
| | - Gemima S Arcanjo
- Programa de Pós-Graduação em Meio Ambiente, Águas e Saneamento, Departamento de Engenharia Ambiental, Universidade Federal da Bahia, 40210-630, Salvador, BA, Brazil.
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Wang Y, Zhao S, Wang S, Zhang J, Zhao Y, Ye C, Zhao Z, Li J, Shen H, Wu D. Electrochemistry detection of estrogenic effect: Regulation of de novo purine synthesis and catabolism by gibberellin and fulvestrant. Bioelectrochemistry 2024; 156:108634. [PMID: 38160510 DOI: 10.1016/j.bioelechem.2023.108634] [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: 09/25/2023] [Revised: 12/16/2023] [Accepted: 12/22/2023] [Indexed: 01/03/2024]
Abstract
The estrogenic effect of plant growth regulators has been received little attention, which leads to the lack of relevant toxicity data. In this study, the estrogenic effect induced by gibberellin with ERα-dependent manner was found by E-screen and western blot methods, and the electrochemical signals of MCF-7 cells regulated by gibberellin and fulvestrant were investigated. The results showed that the electrochemical signals of MCF-7 cells were increased by gibberellin, while reduced by fulvestrant significantly, and displayed an extremely sensitive response to the effects of estrogenic effect induced by ERα agonist and antagonist. Western blot results showed that the expressions of phosphoribosyl pyrophosphate amidotransferase and hypoxanthine nucleotide dehydrogenase in de novo purine synthesis and adenine deaminase in catabolism were more effective regulated by gibberellin and fulvestrant, resulting in significant changes of the levels of guanine, hypoxanthine and xanthine in cells, and then electrochemical signals. The results provide a theoretical basis for the establishment of new electrochemical detection method of the estrogenic effect of plant regulators.
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Affiliation(s)
- Yuhang Wang
- College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, PR China
| | - Shuo Zhao
- College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, PR China
| | - Shuhong Wang
- College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, PR China
| | - Jing Zhang
- College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, PR China
| | - Yanli Zhao
- College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, PR China; Heilongjiang Provincial Key Laboratory of New Drug Development and Pharmacotoxicological Evaluation, Jiamusi University, Jiamusi 154007, PR China
| | - Cai Ye
- College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, PR China; Heilongjiang Provincial Key Laboratory of New Drug Development and Pharmacotoxicological Evaluation, Jiamusi University, Jiamusi 154007, PR China
| | - Zhiyu Zhao
- College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, PR China
| | - Jinlian Li
- College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, PR China; Heilongjiang Provincial Key Laboratory of New Drug Development and Pharmacotoxicological Evaluation, Jiamusi University, Jiamusi 154007, PR China.
| | - Hongkuan Shen
- Jiamusi Inspection and Testing Center, Jiamusi, Heilongjiang 154007, PR China.
| | - Dongmei Wu
- College of Pharmacy, Jiamusi University, Jiamusi, Heilongjiang 154007, PR China; Heilongjiang Provincial Key Laboratory of New Drug Development and Pharmacotoxicological Evaluation, Jiamusi University, Jiamusi 154007, PR China.
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Rispo F, De Negri Atanasio G, Demori I, Costa G, Marchese E, Perera-Del-Rosario S, Serrano-Candelas E, Palomino-Schätzlein M, Perata E, Robino F, Ferrari PF, Ferrando S, Letasiova S, Markus J, Zanotti-Russo M, Grasselli E. An extensive review on phenolic compounds and their potential estrogenic properties on skin physiology. Front Cell Dev Biol 2024; 11:1305835. [PMID: 38250328 PMCID: PMC10798251 DOI: 10.3389/fcell.2023.1305835] [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: 10/02/2023] [Accepted: 12/07/2023] [Indexed: 01/23/2024] Open
Abstract
Polyphenolic compounds constitute a diverse group of natural components commonly occurring in various plant species, known for their potential to exert both beneficial and detrimental effects. Additionally, these polyphenols have also been implicated as endocrine-disrupting (ED) chemicals, raising concerns about their widespread use in the cosmetics industry. In this comprehensive review, we focus on the body of literature pertaining to the estrogenic properties of ED chemicals, with a particular emphasis on the interaction of isoflavones with estrogen receptors. Within this review, we aim to elucidate the multifaceted roles and effects of polyphenols on the skin, exploring their potential benefits as well as their capacity to act as ED agents. By delving into this intricate subject matter, we intend to provoke thoughtful consideration, effectively opening a Pandora's box of questions for the reader to ponder. Ultimately, we invite the reader to contemplate whether polyphenols should be regarded as friends or foes in the realm of skincare and endocrine disruption.
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Affiliation(s)
- Francesca Rispo
- Department of Earth, Environment and Life Science, University of Genoa, Genova, Italy
| | | | - Ilaria Demori
- Department of Pharmacy, University of Genoa, Genova, Italy
| | - Giosuè Costa
- Department of Health Sciences, University "Magna Graecia", Catanzaro, Italy
| | - Emanuela Marchese
- Department of Health Sciences, University "Magna Graecia", Catanzaro, Italy
| | - Simón Perera-Del-Rosario
- ProtoQSAR SL, Centro Europeo de Empresas Innovadoras (CEEI), Parque Tecnológico de Valencia, Valencia, Spain
- Departament de Medicina i Ciències de la Vida, Institut de Biologia Evolutiva (CSIC-UPF), Universitat Pompeu Fabra, Barcelona, Spain
| | - Eva Serrano-Candelas
- ProtoQSAR SL, Centro Europeo de Empresas Innovadoras (CEEI), Parque Tecnológico de Valencia, Valencia, Spain
| | | | | | | | - Pier Francesco Ferrari
- Department of Civil, Chemical and Environmental Engineering, University of Genoa, Genova, Italy
| | - Sara Ferrando
- Department of Earth, Environment and Life Science, University of Genoa, Genova, Italy
| | | | - Jan Markus
- MatTek In Vitro Life Science Laboratories, Bratislava, Slovakia
| | | | - Elena Grasselli
- Department of Earth, Environment and Life Science, University of Genoa, Genova, Italy
- Interuniversity Center for the Promotion of 3R Principles in Teaching and Research (Centro 3R), Pisa, Italy
- National Center for the Development of New Technologies in Agriculture (Agritech), Napoli, Italy
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Hall KA, Filardo EJ. The G Protein-Coupled Estrogen Receptor (GPER): A Critical Therapeutic Target for Cancer. Cells 2023; 12:2460. [PMID: 37887304 PMCID: PMC10605794 DOI: 10.3390/cells12202460] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 09/29/2023] [Accepted: 10/04/2023] [Indexed: 10/28/2023] Open
Abstract
Estrogens have been implicated in the pathogenesis of various cancers, with increasing concern regarding the overall rising incidence of disease and exposure to environmental estrogens. Estrogens, both endogenous and environmental, manifest their actions through intracellular and plasma membrane receptors, named ERα, ERβ, and GPER. Collectively, they act to promote a broad transcriptional response that is mediated through multiple regulatory enhancers, including estrogen response elements (EREs), serum response elements (SREs), and cyclic AMP response elements (CREs). Yet, the design and rational assignment of antiestrogen therapy for breast cancer has strictly relied upon an endogenous estrogen-ER binary rubric that does not account for environmental estrogens or GPER. New endocrine therapies have focused on the development of drugs that degrade ER via ER complex destabilization or direct enzymatic ubiquitination. However, these new approaches do not broadly treat all cancer-involved receptors, including GPER. The latter is concerning since GPER is directly associated with tumor size, distant metastases, cancer stem cell activity, and endocrine resistance, indicating the importance of targeting this receptor to achieve a more complete therapeutic response. This review focuses on the critical importance and value of GPER-targeted therapeutics as part of a more holistic approach to the treatment of estrogen-driven malignancies.
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Cathey AL, Nguyen VK, Colacino JA, Woodruff TJ, Reynolds P, Aung MT. Exploratory profiles of phenols, parabens, and per- and poly-fluoroalkyl substances among NHANES study participants in association with previous cancer diagnoses. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2023; 33:687-698. [PMID: 37718377 PMCID: PMC10541322 DOI: 10.1038/s41370-023-00601-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 08/22/2023] [Accepted: 08/23/2023] [Indexed: 09/19/2023]
Abstract
BACKGROUND Some hormonally active cancers have low survival rates, but a large proportion of their incidence remains unexplained. Endocrine disrupting chemicals may affect hormone pathways in the pathology of these cancers. OBJECTIVE To evaluate cross-sectional associations between per- and polyfluoroalkyl substances (PFAS), phenols, and parabens and self-reported previous cancer diagnoses in the National Health and Nutrition Examination Survey (NHANES). METHODS We extracted concentrations of 7 PFAS and 12 phenols/parabens and self-reported diagnoses of melanoma and cancers of the thyroid, breast, ovary, uterus, and prostate in men and women (≥20 years). Associations between previous cancer diagnoses and an interquartile range increase in exposure biomarkers were evaluated using logistic regression models adjusted for key covariates. We conceptualized race as social construct proxy of structural social factors and examined associations in non-Hispanic Black, Mexican American, and other Hispanic participants separately compared to White participants. RESULTS Previous melanoma in women was associated with higher PFDE (OR:2.07, 95% CI: 1.25, 3.43), PFNA (OR:1.72, 95% CI: 1.09, 2.73), PFUA (OR:1.76, 95% CI: 1.07, 2.89), BP3 (OR: 1.81, 95% CI: 1.10, 2.96), DCP25 (OR: 2.41, 95% CI: 1.22, 4.76), and DCP24 (OR: 1.85, 95% CI: 1.05, 3.26). Previous ovarian cancer was associated with higher DCP25 (OR: 2.80, 95% CI: 1.08, 7.27), BPA (OR: 1.93, 95% CI: 1.11, 3.35) and BP3 (OR: 1.76, 95% CI: 1.00, 3.09). Previous uterine cancer was associated with increased PFNA (OR: 1.55, 95% CI: 1.03, 2.34), while higher ethyl paraben was inversely associated (OR: 0.31, 95% CI: 0.12, 0.85). Various PFAS were associated with previous ovarian and uterine cancers in White women, while MPAH or BPF was associated with previous breast cancer among non-White women. IMPACT STATEMENT Biomarkers across all exposure categories (phenols, parabens, and per- and poly- fluoroalkyl substances) were cross-sectionally associated with increased odds of previous melanoma diagnoses in women, and increased odds of previous ovarian cancer was associated with several phenols and parabens. Some associations differed by racial group, which is particularly impactful given the established racial disparities in distributions of exposure to these chemicals. This is the first epidemiological study to investigate exposure to phenols in relation to previous cancer diagnoses, and the first NHANES study to explore racial/ethnic disparities in associations between environmental phenol, paraben, and PFAS exposures and historical cancer diagnosis.
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Affiliation(s)
- Amber L Cathey
- Department of Environmental Health Sciences, University of Michigan, School of Public Health, Ann Arbor, MI, USA
| | - Vy K Nguyen
- Department of Environmental Health Sciences, University of Michigan, School of Public Health, Ann Arbor, MI, USA
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA
| | - Justin A Colacino
- Department of Environmental Health Sciences, University of Michigan, School of Public Health, Ann Arbor, MI, USA
| | - Tracey J Woodruff
- Program on Reproductive Health and the Environment, Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Peggy Reynolds
- Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, CA, USA
| | - Max T Aung
- Department of Population and Public Health Sciences, University of Southern California, Keck School of Medicine, Los Angeles, CA, USA.
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Olayoku FR, Verhoog NJD, Louw A. Cyclopia extracts act as selective estrogen receptor subtype downregulators in estrogen receptor positive breast cancer cell lines: Comparison to standard of care breast cancer endocrine therapies and a selective estrogen receptor agonist and antagonist. Front Pharmacol 2023; 14:1122031. [PMID: 36992834 PMCID: PMC10040842 DOI: 10.3389/fphar.2023.1122031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 02/28/2023] [Indexed: 03/14/2023] Open
Abstract
Breast cancer is the most diagnosed type of cancer amongst women in economically developing countries and globally. Most breast cancers express estrogen receptor alpha (ERα) and are categorized as positive (ER+) breast cancer. Endocrine therapies such as, selective estrogen receptor modulators (SERMs), aromatase inhibitors (AIs), and selective estrogen receptor downregulators (SERDs) are used to treat ER+ breast cancer. However, despite their effectiveness, severe side-effects and resistance are associated with these endocrine therapies. Thus, it would be highly beneficial to develop breast cancer drugs that are as effective as current therapies, but less toxic with fewer side effects, and less likely to induce resistance. Extracts of Cyclopia species, an indigenous South African fynbos plant, have been shown to possess phenolic compounds that exhibit phytoestrogenic and chemopreventive activities against breast cancer development and progression. In the current study, three well characterized Cyclopia extracts, SM6Met, cup of tea (CoT) and P104, were examined for their abilities to modulate the levels of the estrogen receptor subtypes, estrogen receptor alpha and estrogen receptor beta (ERβ), which have been recognized as crucial to breast cancer prognosis and treatment. We showed that the Cyclopia subternata Vogel (C. subternata Vogel) extracts, SM6Met and cup of tea, but not the C. genistoides extract, P104, reduced estrogen receptor alpha protein levels while elevating estrogen receptor beta protein levels, thereby reducing the ERα:ERβ ratio in a similar manner as standard of care breast cancer endocrine therapies such as fulvestrant (selective estrogen receptor downregulator) and 4-hydroxytamoxifen (elective estrogen receptor modulator). Estrogen receptor alpha expression enhances the proliferation of breast cancer cells while estrogen receptor beta inhibits the proliferative activities of estrogen receptor alpha. We also showed that in terms of the molecular mechanisms involved all the Cyclopia extracts regulated estrogen receptor alpha and estrogen receptor beta protein levels through both transcriptional and translational, and proteasomal degradation mechanisms. Therefore, from our findings, we proffer that the C. subternata Vogel extracts, SM6Met and cup of tea, but not the C. genistoides extract, P104, selectively modulate estrogen receptor subtypes levels in a manner that generally supports inhibition of breast cancer proliferation, thereby demonstrating attributes that could be explored as potential therapeutic agents for breast cancer.
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Marcos X, Méndez-Luna D, Fragoso-Vázquez M, Rosales-Hernández M, Correa-Basurto J. Anti-breast cancer activity of novel compounds loaded in polymeric mixed micelles: Characterization and in vitro studies. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102815] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Polemi KM, Nguyen VK, Heidt J, Kahana A, Jolliet O, Colacino JA. Identifying the link between chemical exposures and breast cancer in African American women via integrated in vitro and exposure biomarker data. Toxicology 2021; 463:152964. [PMID: 34600088 PMCID: PMC8593892 DOI: 10.1016/j.tox.2021.152964] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 09/21/2021] [Accepted: 09/24/2021] [Indexed: 12/27/2022]
Abstract
Among women, breast cancer is the most prevalent form of cancer worldwide and has the second highest mortality rate of any cancer in the United States. The breast cancer related death rate is 40 % higher in non-Hispanic Black women compared to non-Hispanic White women. The incidence of triple negative breast cancer (TNBC), an aggressive subtype of breast cancer for which there is no targeted therapy, is also approximately three times higher for Black, relative to, White women. The drivers of these differences are poorly understood. Here, we aimed to identify chemical exposures which play a role in breast cancer disparities. Using chemical biomonitoring data from the National Health and Nutrition Examination Survey (NHANES) and biological activity data from the EPA's ToxCast program, we assessed the toxicological profiles of chemicals to which US Black women are disproportionately exposed. We conducted a literature search to identify breast cancer targets in ToxCast to analyze the response of chemicals with exposure disparities in these assays. Forty-three chemical biomarkers are significantly higher in Black women. Investigation of these chemicals in ToxCast resulted in 32,683 assays for analysis, 5172 of which contained nonzero values for the concentration at which the dose-response fitted model reaches the cutoff considered "active". Of these chemicals BPA, PFOS, and thiram are most comprehensively assayed. 2,5-dichlorophenol, 1,4-dichlorobenzene, and methyl and propyl parabens had higher biomarker concentrations in Black women and moderate testing and activity in ToxCast. The distribution of active concentrations for these chemicals in ToxCast assays are comparable to biomarker concentrations in Black women NHANES participants. Through this integrated analysis, we identify that multiple chemicals, including thiram, propylparaben, and p,p' DDE, have disproportionate exposures in Black women and have breast cancer associated biological activity at human exposure relevant doses.
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Affiliation(s)
- Katelyn M Polemi
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Vy K Nguyen
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA; Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, USA
| | - Julien Heidt
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Adam Kahana
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Olivier Jolliet
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA; Center for Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, USA
| | - Justin A Colacino
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA; Center for Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, USA; Department of Nutritional Sciences, University of Michigan, Ann Arbor, MI, USA.
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Pu X, Chen D. Targeting Adipokines in Obesity-Related Tumors. Front Oncol 2021; 11:685923. [PMID: 34485124 PMCID: PMC8415167 DOI: 10.3389/fonc.2021.685923] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 07/22/2021] [Indexed: 12/18/2022] Open
Abstract
Obesity, a global epidemic, is an independent risk factor for the occurrence and development of a variety of tumors, such as breast cancer, pancreatic cancer, ovarian cancer and colorectal cancer. Adipocytes are important endocrine cells in the tumor microenvironment of obesity-related tumors, which can secrete a variety of adipokines (such as leptin, adiponectin, estrogen, resistin, MIF and MCP-1, etc.), among which leptin, adiponectin and estrogen are the most in-depth and valuable ones. These adipokines are closely related to tumorigenesis and the progression of tumors. In recent years, more and more studies have shown that under chronic inflammatory conditions such as obesity, adipocytes secrete more adipokines to promote the tumorigenesis and development of tumors. However, it is worth noting that although adiponectin is also secreted by adipocytes, it has an anti-tumor effect, and can cross-talk with other adipokines (such as leptin and estrogen) and insulin to play an anti-tumor effect together. In addition, obesity is the main cause of insulin resistance, which can lead to the increase of the expression levels of insulin and insulin-like growth factor (IGF). As important regulators of blood glucose and lipid metabolism, insulin and IGF also play an important role in the progress of obesity related tumors. In view of the important role of adipokines secreted by adipocytes and insulin/IGF in tumors, this article not only elaborates leptin, adiponectin and estrogen secreted by adipocytes and their mechanism of action in the development of obesity- related tumors, but also introduces the relationship between insulin/IGF, a regulator of lipid metabolism, and obesity related tumors. At the same time, it briefly describes the cancer-promoting mechanism of resistin, MIF and MCP-1 in obesity-related tumors, and finally summarizes the specific treatment opinions and measures for various adipokines and insulin/insulin-like growth factors in recent years.
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Affiliation(s)
- Xi Pu
- Institute of Oncology, Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Deyu Chen
- Institute of Oncology, Affiliated Hospital of Jiangsu University, Zhenjiang, China
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Rooney J, Ryan N, Liu J, Houtman R, van Beuningen R, Hsieh JH, Chang G, Chen S, Christopher Corton J. A Gene Expression Biomarker Identifies Chemical Modulators of Estrogen Receptor α in an MCF-7 Microarray Compendium. Chem Res Toxicol 2021; 34:313-329. [PMID: 33405908 PMCID: PMC10683854 DOI: 10.1021/acs.chemrestox.0c00243] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Identification of chemicals that affect hormone-regulated systems will help to predict endocrine disruption. In our previous study, a 46 gene biomarker was found to be an accurate predictor of estrogen receptor (ER) α modulation in chemically treated MCF-7 cells. Here, potential ERα modulators were identified using the biomarker by screening a microarray compendium consisting of ∼1600 gene expression comparisons representing exposure to ∼1200 chemicals. A total of ∼170 chemicals were identified as potential ERα modulators. In the Connectivity Map 2.0 collection, 75 and 39 chemicals were predicted to activate or suppress ERα, and they included 12 and six known ERα agonists and antagonists/selective ERα modulators, respectively. Nineteen and eight of the total number were also identified as active in an ERα transactivation assay carried out in an MCF-7-derived cell line used to screen the Tox21 10K chemical library in agonist or antagonist modes, respectively. Chemicals predicted to modulate ERα in MCF-7 cells were examined further using global and targeted gene expression in wild-type and ERα-null cells, transactivation assays, and cell-free ERα coregulator interaction assays. Environmental chemicals classified as weak and very weak agonists were confirmed to activate ERα including apigenin, kaempferol, and oxybenzone. Novel activators included digoxin, nabumetone, ivermectin, and six progestins. Novel suppressors included emetine, mifepristone, niclosamide, and proscillaridin. Our strategy will be useful to identify environmentally relevant ERα modulators in future high-throughput transcriptomic screens.
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Affiliation(s)
- John Rooney
- Center for Computational Toxicology and Exposure, US-EPA, Research Triangle Park, NC 27711
- Present address: Integrated Lab Services, Research Triangle Park, NC
| | - Natalia Ryan
- Center for Computational Toxicology and Exposure, US-EPA, Research Triangle Park, NC 27711
- Present address: Bayer Crop Science, Research Triangle Park, NC
| | - Jie Liu
- Center for Computational Toxicology and Exposure, US-EPA, Research Triangle Park, NC 27711
| | - René Houtman
- PamGene International B.V., Den Bosch, The Netherlands
- Present address: Precision Medicine Lab, Oss, The Netherlands
| | | | - Jui-Hua Hsieh
- Kelly Government Solutions, Research Triangle Park, North Carolina
| | - Gregory Chang
- Department of Cancer Biology, Beckman Research Institute of the City of Hope, Duarte,California 91010
| | - Shiuan Chen
- Department of Cancer Biology, Beckman Research Institute of the City of Hope, Duarte,California 91010
| | - J. Christopher Corton
- Center for Computational Toxicology and Exposure, US-EPA, Research Triangle Park, NC 27711
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Almeida M, Soares M, Fonseca-Moutinho J, Ramalhinho AC, Breitenfeld L. Influence of Estrogenic Metabolic Pathway Genes Polymorphisms on Postmenopausal Breast Cancer Risk. Pharmaceuticals (Basel) 2021; 14:ph14020094. [PMID: 33513690 PMCID: PMC7910923 DOI: 10.3390/ph14020094] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 01/23/2021] [Indexed: 12/21/2022] Open
Abstract
Estrogen metabolism plays an important role in tumor initiation and development. Lifetime exposure to high estrogens levels and deregulation of enzymes involved in estrogen biosynthetic and metabolic pathway are considered risk factors for breast cancer. The present study aimed to evaluate the impact of mutations acquisition during the lifetime in low penetrance genes that codify enzymes responsible for estrogen detoxification. Genotype analysis of GSTM1 and GSTT1 null polymorphisms, CYP1B1 Val432Leu and MTHFR C677T polymorphisms was performed in 157 samples of women with hormone-dependent breast cancer and correlated with the age at diagnosis. The majority of patients with GSTT1 null genotype and with both GSTM1 and GSTT1 null genotypes were 50 years old or more at the diagnosis (p-value = 0.021 and 0.018, respectively). Older women with GSTM1 null genotype were also carriers of the CYP1B1Val allele (p-value = 0.012). As well, GSTT1 null and CYP1B1Val genotypes were correlated with diagnosis at later ages (p-value = 0.022). Similar results were found associating MTHFR C677T and GSTT1 null polymorphism (p-value = 0.034). Our results suggest that estrogen metabolic pathway polymorphisms constitute a factor to be considered simultaneously with models for breast cancer risk assessment.
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Affiliation(s)
- Micaela Almeida
- Health Sciences Research Centre (CICS), Faculty of Health Sciences, University of Beira Interior (UBI), Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal; (M.A.); (M.S.); (J.F.-M.); (A.C.R.)
| | - Mafalda Soares
- Health Sciences Research Centre (CICS), Faculty of Health Sciences, University of Beira Interior (UBI), Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal; (M.A.); (M.S.); (J.F.-M.); (A.C.R.)
| | - José Fonseca-Moutinho
- Health Sciences Research Centre (CICS), Faculty of Health Sciences, University of Beira Interior (UBI), Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal; (M.A.); (M.S.); (J.F.-M.); (A.C.R.)
- Academic Hospital of Cova da Beira (CHUCB), Quinta do Alvito, 6200-251 Covilhã, Portugal
| | - Ana Cristina Ramalhinho
- Health Sciences Research Centre (CICS), Faculty of Health Sciences, University of Beira Interior (UBI), Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal; (M.A.); (M.S.); (J.F.-M.); (A.C.R.)
- Academic Hospital of Cova da Beira (CHUCB), Quinta do Alvito, 6200-251 Covilhã, Portugal
| | - Luiza Breitenfeld
- Health Sciences Research Centre (CICS), Faculty of Health Sciences, University of Beira Interior (UBI), Avenida Infante D. Henrique, 6200-506 Covilhã, Portugal; (M.A.); (M.S.); (J.F.-M.); (A.C.R.)
- Correspondence: ; Tel.: +351-2753-290-51
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12
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Delvaux A, Rathahao-Paris E, Alves S. An emerging powerful technique for distinguishing isomers: Trapped ion mobility spectrometry time-of-flight mass spectrometry for rapid characterization of estrogen isomers. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2020; 34:e8928. [PMID: 32833266 DOI: 10.1002/rcm.8928] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/28/2020] [Accepted: 08/18/2020] [Indexed: 06/11/2023]
Abstract
RATIONALE Isomer metabolites are involved in metabolic pathways, and their characterization is essential but remains challenging even using high-performance analytical platforms. The addition of ion mobility prior to mass analysis can help to separate isomers. Here, the ability of a recently developed trapped ion mobility spectrometry system to separate metabolite isomers was examined. METHODS Three pairs of estrogen isomers were studied as a model of isomeric metabolites under both negative and positive electrospray ionization (ESI) modes using a commercial trapped ion mobility spectrometry-TOF mass spectrometer. The standard metabolites were also spiked into human urine to evaluate the efficiency of trapped ion mobility spectrometry to separate isomers in complex mixtures. RESULTS The estradiol glucuronide isomers (E2 β-3G and E2 β-17G) could be distinguished as deprotonated species, while the estradiol epimers (E2 β and E2 α) and the methoxyestradiol isomers (2-MeO-E2 β and 4-MeO-E2 β) were separated as lithiated adducts in positive ionization mode. When performing analyses in the urine matrix, no alteration in the ion mobility resolving power was observed and the measured collision cross section (CCS) values varied by less than 1.0%. CONCLUSIONS The trapped ion mobility spectrometry-TOF mass spectrometer enabled the separation of the metabolite isomers with very small differences in CCS values (ΔCCS% = 2%). It is shown to be an effective tool for the rapid characterization of isomers in complex matrices.
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Affiliation(s)
- Aurélie Delvaux
- Institut Parisien de Chimie Moléculaire, CNRS, Faculté des Sciences et de l'Ingénierie, Sorbonne Université, Paris, F-75005, France
| | - Estelle Rathahao-Paris
- Institut Parisien de Chimie Moléculaire, CNRS, Faculté des Sciences et de l'Ingénierie, Sorbonne Université, Paris, F-75005, France
- CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), SPI, Université Paris-Saclay, Gif-sur-Yvette, F-91191, France
| | - Sandra Alves
- Institut Parisien de Chimie Moléculaire, CNRS, Faculté des Sciences et de l'Ingénierie, Sorbonne Université, Paris, F-75005, France
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13
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Orlandella FM, De Stefano AE, Iervolino PLC, Buono P, Soricelli A, Salvatore G. Dissecting the molecular pathways involved in the effects of physical activity on breast cancers cells: A narrative review. Life Sci 2020; 265:118790. [PMID: 33220294 DOI: 10.1016/j.lfs.2020.118790] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 11/12/2020] [Accepted: 11/15/2020] [Indexed: 02/06/2023]
Abstract
Epidemiologic evidence suggests that obesity and sedentary are modifiable factors strongly associated with breast cancer risk worldwide. Since breast cancer represents the most frequent malignant neoplasm and the second cause of cancer-related deaths in women worldwide, an insight into the molecular mechanisms clarifying the effects of physical activity in breast cancer cells could have important implication for changing this cancer burden. In this narrative Review article, we summarize the current knowledge, regarding the effects of adapted physical activity program, focusing on the cellular signaling pathways activated and on the molecular markers involved in breast cancer. Regular exercise training in breast cancer patients has been shown to positively affect tumor-growth and survival rate. Indeed, emerging work demonstrates that regular exercise is able to affect multiple cancer hallmarks influencing the development and progression of cancer. In conclusion, changes in the circulating insulin, adipokines and estrogen levels, inflammation and oxidative stress could represent some of the possible biological mechanisms through which exercise may influence breast cancer development and recurrence.
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Affiliation(s)
| | - Anna Elisa De Stefano
- Dipartimento di Scienze Motorie e del Benessere, Università "Parthenope", Via Medina 40, 80133 Naples, Italy; CEINGE - Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Naples, Italy
| | - Paola Lucia Chiara Iervolino
- CEINGE - Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Naples, Italy; Dipartimento di Scienze Biomediche Avanzate, Università "Federico II", Via Pansini 5, 80131 Naples, Italy
| | - Pasqualina Buono
- Dipartimento di Scienze Motorie e del Benessere, Università "Parthenope", Via Medina 40, 80133 Naples, Italy; CEINGE - Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Naples, Italy
| | - Andrea Soricelli
- IRCCS SDN, Via Emanuele Gianturco 113, 80143 Naples, Italy; Dipartimento di Scienze Motorie e del Benessere, Università "Parthenope", Via Medina 40, 80133 Naples, Italy
| | - Giuliana Salvatore
- IRCCS SDN, Via Emanuele Gianturco 113, 80143 Naples, Italy; Dipartimento di Scienze Motorie e del Benessere, Università "Parthenope", Via Medina 40, 80133 Naples, Italy; CEINGE - Biotecnologie Avanzate S.c.a.r.l., Via Gaetano Salvatore 486, 80145 Naples, Italy
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14
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Li N, Zhao T, Du L, Zhang Z, Nian Q, Wang M. Fast and simple determination of estrogens in milk powders by magnetic solid-phase extraction using carbon nitride composites prior to HPLC. Anal Bioanal Chem 2020; 413:215-223. [PMID: 33068132 DOI: 10.1007/s00216-020-02993-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/25/2020] [Accepted: 10/06/2020] [Indexed: 10/23/2022]
Abstract
A graphitic carbon nitride (g-C3N4/Fe3O4)-based magnetic solid-phase extraction (MSPE) approach was established for fast and simple analysis of estrogens in milk powders. The composites were characterized by X-ray diffractometer, scanning electron microscope, and Brunauer-Emmett-Teller surface area and pore size distribution analyzer. Compared with the bulk g-C3N4, g-C3N4/Fe3O4 gave a narrower distribution of mesopores and provided an enhanced surface area from 77.1 to 113.7 m2/g. Polar analytes of estrogens were selected as model compounds and the extraction of four estrogens was achieved in n-hexane using 15 mg of adsorbent within only 2 min. Possible extraction mechanism of g-C3N4/Fe3O4 for these estrogens was explored in terms of the polarity of the analytes and the adsorption performance of the adsorbent. The hydrophobicity and the hydrogen-bond interaction between the estrogens and g-C3N4 were responsible for the efficient adsorption. Combined with HPLC, MSPE with the prepared adsorbent gave the enhancement factors of 20 to 24 and the linear ranges of 2-200 μg/kg for 17β-estradiol and 17α-ethinylestradiol, 1.5-150 μg/kg for estrone, and 3-300 μg/kg for hexestrol. The detection limits and quantification limits for the estrogens in milk powders were 0.5-0.9 μg/kg and 1.5-3.0 μg/kg, respectively. The recoveries varied from 75.1 to 97.2%, with the intra-day and inter-day precisions ≤ 14.2%. Furthermore, the enrichment of the analytes and the clean-up of fat and protein interferences were achieved simultaneously with one-step g-C3N4-based MSPE. The present method was convenient, fast, and sensitive, and therefore could be successfully applied for the determination of estrogens in milk powders. Graphical abstract.
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Affiliation(s)
- Na Li
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China
| | - Tengwen Zhao
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China
| | - Li Du
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China
| | - Ziyang Zhang
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China
| | - Qixun Nian
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China
| | - Manman Wang
- School of Public Health, North China University of Science and Technology, No.21 Bohai Road, Caofeidian, Tangshan, 063210, Hebei, China.
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15
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Mikhraliieva A, Zaitsev V, Tkachenko O, Nazarkovsky M, Xing Y, Benvenutti EV. Graphene oxide quantum dots immobilized on mesoporous silica: preparation, characterization and electroanalytical application. RSC Adv 2020; 10:31305-31315. [PMID: 35520679 PMCID: PMC9056381 DOI: 10.1039/d0ra04605a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 07/15/2020] [Indexed: 11/29/2022] Open
Abstract
Because of its high surface area and combination of various functional groups, graphene oxide (GO) is currently one of the most actively studied materials for electroanalytical applications. It is not practical to utilize self-supported GO on its own and thus it is commonly integrated with different supporting carriers. Having a large lateral size, GO can only wrap the particles of the support and thus can significantly reduce the surface area of porous materials. To achieve synergy from the high surface area and polyfunctional nature of GO, and the rigid structure of a porous support, the lateral size of GO must essentially be decreased. Recently reported graphene oxide quantum dots (GOQDs) can fulfil this task. Here we report the successful preparation of an SiO2-GOQDs hybrid, where GOQDs have been incorporated into the mesoporous network of silica. The SiO2-GOQDs emit a strong luminescence with a band maximum at 404 nm. The Raman spectrum of SiO2-GOQDs shows two distinct peaks at 1585 cm−1 (G-peak) and 1372 cm−1 (D-peak), indicating the presence of a graphene ordered basal plane with aromatic sp2-domains and a disordered oxygen-containing structure. Covalent immobilization of GOQDs onto aminosilica via such randomly structured oxygen fragments was proven with the help of Fourier transform infrared spectroscopy, solid-state cross-polarization magic angle spinning 13C nuclear magnetic resonance, and X-ray photoelectron spectroscopy. SiO2-GOQDs were used as a modifier of a carbon paste electrode for differential pulse voltammetry determination of two antibiotics (sulfamethoxazole and trimethoprim) and two endocrine disruptors (diethylstilbestrol (DES) and estriol (EST)). The modified electrodes demonstrated a significant signal enhancement for EST (370%) and DES (760%), which was explained by a π–π stacking interaction between GOQDs and the aromatic system of the analytes. Graphene oxide quantum dots incorporated into a mesoporous silica network have been used as a modifier of a carbon paste electrode for the determination of antibiotics and hormones.![]()
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Affiliation(s)
- Albina Mikhraliieva
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro Marquês de São Vicente, 225 22451-900 Rio de Janeiro Brazil
| | - Vladimir Zaitsev
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro Marquês de São Vicente, 225 22451-900 Rio de Janeiro Brazil .,National University of Kyiv-Mohyla Academy 2 Skovorody vul. Kyiv 04070 Ukraine
| | - Oleg Tkachenko
- Materials Chemistry Department, V. N. Karazin Kharkiv National University 4 Svoboda Square Kharkiv 61022 Ukraine.,Institute of Chemistry, UFRGS PO Box 15003, CEP Porto Alegre RS 91501-970 Brazil
| | - Michael Nazarkovsky
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro Marquês de São Vicente, 225 22451-900 Rio de Janeiro Brazil
| | - Yutao Xing
- Laboratório de Microscopia Eletrônica de Alta Resolução, Centro de Caracterização Avançada para Indústria de Petróleo (LaMAR/CAIPE), Universidade Federal Fluminense 24210-346 Niterói RJ Brazil
| | - Edilson V Benvenutti
- Materials Chemistry Department, V. N. Karazin Kharkiv National University 4 Svoboda Square Kharkiv 61022 Ukraine
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16
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Hu Q, Guan XQ, Song LL, Wang HN, Xiong Y, Liu JL, Yin H, Cao YF, Hou J, Yang L, Ge GB. Inhibition of pancreatic lipase by environmental xenoestrogens. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 192:110305. [PMID: 32070782 DOI: 10.1016/j.ecoenv.2020.110305] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 02/01/2020] [Accepted: 02/05/2020] [Indexed: 06/10/2023]
Abstract
Environmental xenoestrogens are the most accessible endocrine disrupting chemicals that have been reported with harmful effects on human health. Although the influences of xenoestrogens on the endocrine system have been extensively studied, it remains unclear whether these xenoestrogens can affect the digestive system in mammals. This study aimed to investigate the inhibitory effects and the underlying mechanism of six non-steroidal synthetic estrogens (including hexestrol, diethylstilbestrol, dienestrol, bisphenol A, bisphenol AF and bisphenol Z) on pancreatic lipase (PL), a key digestive enzyme responsible for lipid digestion and absorption in mammals. The results clearly demonstrated that hexestrol, diethylstilbestrol and dienestrol exhibited strong inhibition on PL, with the IC50 values of less than 1.0 μM. Further investigations elucidated that these three synthetic estrogens functioned as mixed inhibitors of PL, with the Ki values of less than 1 μM. Moreover, molecular dynamics simulations showed that diethylstilbestrol and its analogues might block the binding of substrate on PL via occupying the portal to the active site of PL and thereby inhibit the hydrolytic activity of this key enzyme. Collectively, these results suggested that diethylstilbestrol and its analogues were potent PL inhibitors, which might play a profound role in lipid absorption and weight gain in mammals.
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Affiliation(s)
- Qing Hu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Xiao-Qing Guan
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Li-Lin Song
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Hao-Nan Wang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Yuan Xiong
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Jun-Ling Liu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Heng Yin
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Yun-Feng Cao
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; Dalian Runsheng Kangtai Medical Laboratory Co.Ltd, Dalian, China
| | - Jie Hou
- College of Basic Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Ling Yang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Guang-Bo Ge
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
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17
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Temkin AM, Hocevar BA, Andrews DQ, Naidenko OV, Kamendulis LM. Application of the Key Characteristics of Carcinogens to Per and Polyfluoroalkyl Substances. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E1668. [PMID: 32143379 PMCID: PMC7084585 DOI: 10.3390/ijerph17051668] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 01/09/2023]
Abstract
Per- and polyfluoroalkyl substances (PFAS) constitute a large class of environmentally persistent chemicals used in industrial and consumer products. Human exposure to PFAS is extensive, and PFAS contamination has been reported in drinking water and food supplies as well as in the serum of nearly all people. The most well-studied member of the PFAS class, perfluorooctanoic acid (PFOA), induces tumors in animal bioassays and has been associated with elevated risk of cancer in human populations. GenX, one of the PFOA replacement chemicals, induces tumors in animal bioassays as well. Using the Key Characteristics of Carcinogens framework for cancer hazard identification, we considered the existing epidemiological, toxicological and mechanistic data for 26 different PFAS. We found strong evidence that multiple PFAS induce oxidative stress, are immunosuppressive, and modulate receptor-mediated effects. We also found suggestive evidence indicating that some PFAS can induce epigenetic alterations and influence cell proliferation. Experimental data indicate that PFAS are not genotoxic and generally do not undergo metabolic activation. Data are currently insufficient to assess whether any PFAS promote chronic inflammation, cellular immortalization or alter DNA repair. While more research is needed to address data gaps, evidence exists that several PFAS exhibit one or more of the key characteristics of carcinogens.
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Affiliation(s)
- Alexis M. Temkin
- Environmental Working Group, Washington, DC 20009, USA; (D.Q.A.); (O.V.N.)
| | - Barbara A. Hocevar
- Department of Environmental and Occupational Health, School of Public Health, Indiana University, Bloomington, IN 47405, USA; (B.A.H.); (L.M.K.)
| | - David Q. Andrews
- Environmental Working Group, Washington, DC 20009, USA; (D.Q.A.); (O.V.N.)
| | - Olga V. Naidenko
- Environmental Working Group, Washington, DC 20009, USA; (D.Q.A.); (O.V.N.)
| | - Lisa M. Kamendulis
- Department of Environmental and Occupational Health, School of Public Health, Indiana University, Bloomington, IN 47405, USA; (B.A.H.); (L.M.K.)
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