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Zhao C, Jin H, Lei Y, Li Q, Zhang Y, Lu Q. The dual effects of Benzo(a)pyrene/Benzo(a)pyrene-7,8-dihydrodiol-9,10-epoxide on DNA Methylation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 950:175042. [PMID: 39084379 DOI: 10.1016/j.scitotenv.2024.175042] [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: 03/12/2024] [Revised: 07/04/2024] [Accepted: 07/23/2024] [Indexed: 08/02/2024]
Abstract
Benzo(a)pyrene (BaP) is one of the most thoroughly studied polycyclic aromatic hydrocarbons(PAHs) and a widespread organic pollutant in various areas of human life. Its teratogenic, immunotoxic and carcinogenic effects on organisms are well documented and widely recognized by researchers. In the body, BaP is enzymatically converted to form a more active benzo(a)pyrene-7,8-dihydrodiol-9,10-epoxide (BPDE). BaP/BPDE has the potential to trigger gene mutations, influence epigenetic modifications and cause damage to cellular structures, ultimately contributing to disease onset and progression. However, there are different points of view when studying epigenetics using BaP/BPDE. On the one hand, it is claimed in cancer research that BaP/BPDE contributes to gene hypermethylation and, in particular, induces the hypermethylation of tumor's suppressor gene promoters, leading to gene silencing and subsequent cancer development. Conversely, studies in human and animal populations suggest that exposure to BaP results in genome-wide DNA hypomethylation, potentially leading to adverse outcomes in inflammatory diseases. This apparent contradiction has not been summarized in research for almost four decades. This article presents a comprehensive review of the current literature on the influence of BaP/BPDE on DNA methylation regulation. It demonstrates that BaP/BPDE exerts a dual-phase regulatory effect on methylation, which is influenced by factors such as the concentration and duration of BaP/BPDE exposure, experimental models and detection methods used in various studies. Acute/high concentration exposure to BaP/BPDE often results in global demethylation of DNA, which is associated with inhibition of DNA methyltransferase 1 (DNMT1) after exposure. At certain specific gene loci (e.g., RAR-β), BPDE can form DNA adducts, recruiting DNMT3 and leading to hypermethylation at specific sites. By integrating these different mechanisms, our goal is to unravel the patterns and regulations of BaP/BPDE-induced DNA methylation changes and provide insights into future precision therapies targeting epigenetics.
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Affiliation(s)
- Cheng Zhao
- Department of Dermatology, The Second Xiangya Hospital of Central South University, Central South University Hunan Key Laboratory of Medical Epigenomics Changsha, China; Research Unit of Key Technologies of Immune-related Skin Diseases Diagnosis and Treatment, Chinese Academy of Medical Sciences Institute of Dermatology, Nanjing, China; Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China; Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Hui Jin
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China.
| | - Yu Lei
- Department of Dermatology, The Second Xiangya Hospital of Central South University, Central South University Hunan Key Laboratory of Medical Epigenomics Changsha, China; Research Unit of Key Technologies of Immune-related Skin Diseases Diagnosis and Treatment, Chinese Academy of Medical Sciences Institute of Dermatology, Nanjing, China; Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China; Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Qilin Li
- Department of Dermatology, The Second Xiangya Hospital of Central South University, Central South University Hunan Key Laboratory of Medical Epigenomics Changsha, China; Research Unit of Key Technologies of Immune-related Skin Diseases Diagnosis and Treatment, Chinese Academy of Medical Sciences Institute of Dermatology, Nanjing, China; Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China; Hunan Key Laboratory of Medical Epigenomics, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Ying Zhang
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China; Department of Epidemiology and Biostatistics, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Qianjin Lu
- Department of Dermatology, The Second Xiangya Hospital of Central South University, Central South University Hunan Key Laboratory of Medical Epigenomics Changsha, China; Research Unit of Key Technologies of Immune-related Skin Diseases Diagnosis and Treatment, Chinese Academy of Medical Sciences Institute of Dermatology, Nanjing, China; Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China; Key Laboratory of Basic and Translational Research on Immune-Mediated Skin Diseases, Chinese Academy of Medical Sciences, Nanjing, China; Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China.
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Kumar P, Singh AB, Arora T, Singh S, Singh R. Critical review on emerging health effects associated with the indoor air quality and its sustainable management. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 872:162163. [PMID: 36781134 DOI: 10.1016/j.scitotenv.2023.162163] [Citation(s) in RCA: 32] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/05/2023] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
Indoor air quality (IAQ) is one of the fundamental elements affecting people's health and well-being. Currently, there is a lack of awareness among people about the quantification, identification, and possible health effects of IAQ. Airborne pollutants such as volatile organic compounds (VOCs), particulate matter (PM), sulfur dioxide (SO2), carbon monoxide (CO), nitrous oxide (NO), polycyclic aromatic hydrocarbons (PAHs) microbial spores, pollen, allergens, etc. primarily contribute to IAQ deterioration. This review discusses the sources of major indoor air pollutants, molecular toxicity mechanisms, and their effects on cardiovascular, ocular, neurological, women, and foetal health. Additionally, contemporary strategies and sustainable methods for regulating and reducing pollutant concentrations are emphasized, and current initiatives to address and enhance IAQ are explored, along with their unique advantages and potentials. Due to their longer exposure times and particular physical characteristics, women and children are more at risk for poor indoor air quality. By triggering many toxicity mechanisms, including oxidative stress, DNA methylation, epigenetic modifications, and gene activation, indoor air pollution can cause a range of health issues. Low birth weight, acute lower respiratory tract infections, Sick building syndromes (SBS), and early death are more prevalent in exposed residents. On the other hand, the main causes of incapacity and early mortality are lung cancer, chronic obstructive pulmonary disease, and cardiovascular disorders. It's crucial to acknowledge anticipated research needs and implemented efficient interventions and policies to lower health hazards.
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Affiliation(s)
- Pradeep Kumar
- Department of Environmental Studies, Satyawati College, University of Delhi, Delhi 52, India
| | - A B Singh
- Institute of Genomics and Integrative Biology (IGIB), Mall Road Campus, Delhi 07, India
| | - Taruna Arora
- Division of Reproductive Biology, Maternal and Child Health, Indian Council of Medical Research, Ansari Nagar, New Delhi 110029, India
| | - Sevaram Singh
- Translational Health Science and Technology Institute, NCR Biotech Science Cluster, 3rd Milestone, Faridabad 121001, India; Jawaharlal Nehru University, New Mehrauli Road, New Delhi 110067, India
| | - Rajeev Singh
- Department of Environmental Studies, Satyawati College, University of Delhi, Delhi 52, India; Department of Environmental Science, Jamia Millia Islamia (A Central University), New Delhi 110025, India.
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Munnia A, Bollati V, Russo V, Ferrari L, Ceppi M, Bruzzone M, Dugheri S, Arcangeli G, Merlo F, Peluso M. Traffic-Related Air Pollution and Ground-Level Ozone Associated Global DNA Hypomethylation and Bulky DNA Adduct Formation. Int J Mol Sci 2023; 24:ijms24032041. [PMID: 36768368 PMCID: PMC9916664 DOI: 10.3390/ijms24032041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/09/2023] [Accepted: 01/17/2023] [Indexed: 01/22/2023] Open
Abstract
Studies have indicated that air pollution, including surface-level ozone (O3), can significantly influence the risk of chronic diseases. To better understand the carcinogenic mechanisms of air pollutants and identify predictive disease biomarkers, we examined the association between traffic-related pollutants with DNA methylation alterations and bulky DNA adducts, two biomarkers of carcinogen exposure and cancer risk, in the peripheral blood of 140 volunteers-95 traffic police officers, and 45 unexposed subjects. The DNA methylation and adduct measurements were performed by bisulfite-PCR and pyrosequencing and 32P-postlabeling assay. Airborne levels of benzo(a)pyrene [B(a)P], carbon monoxide, and tropospheric O3 were determined by personal exposure biomonitoring or by fixed monitoring stations. Overall, air pollution exposure was associated with a significant reduction (1.41 units) in global DNA methylation (95% C.I. -2.65-0.04, p = 0.026). The decrement in ALU repetitive elements was greatest in the policemen working downtown (95% C.I. -3.23--0.49, p = 0.008). The DNA adducts were found to be significantly increased (0.45 units) in the municipal officers with respect to unexposed subjects (95% C.I. 0.02-0.88, p = 0.039), mainly in those who were controlling traffic in downtown areas (95% C.I. 0.39-1.29, p < 0.001). Regression models indicated an increment of ALU methylation at higher B(a)P concentrations (95% C.I. 0.03-0.60, p = 0.032). Moreover, statistical models showed a decrement in ALU methylation and an increment of DNA damage only above the cut-off value of 30 µg/m3 O3. A significant increment of 0.73 units of IL-6 gene methylation was also found in smokers with respect to non-smokers. Our results highlighted the role of air pollution on epigenetic alterations and genotoxic effects, especially above the target value of 30 µg/m3 surface-level O3, supporting the necessity for developing public health strategies aimed to reduce traffic-related air pollution molecular alterations.
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Affiliation(s)
- Armelle Munnia
- Research Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy
| | - Valentina Bollati
- EPIGET Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, 20122 Milan, Italy
- Occupational Health Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
| | - Valentina Russo
- Research Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy
| | - Luca Ferrari
- EPIGET Department of Clinical Sciences and Community Health, Università Degli Studi di Milano, 20122 Milan, Italy
- Occupational Health Unit, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
| | - Marcello Ceppi
- Clinical Epidemiology Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy
| | - Marco Bruzzone
- Clinical Epidemiology Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genoa, Italy
| | - Stefano Dugheri
- Laboratorio di Igiene e Tossicologia Industriale, Azienda Ospedaliero-Universitaria Careggi, 50134 Florence, Italy
| | - Giulio Arcangeli
- Dipartimento di Medicina Sperimentale e Clinica, Università degli Studi di Firenze, 50121 Florence, Italy
| | - Franco Merlo
- Research and Statistics Infrastructure, Azienda Unità Sanitaria Locale, IRCCS, 42121 Reggio Emilie, Italy
| | - Marco Peluso
- Research Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy
- Correspondence:
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Issah I, Arko-Mensah J, Rozek LS, Rentschler K, Agyekum TP, Dwumoh D, Batterman S, Robins TG, Fobil JN. Association between global DNA methylation (LINE-1) and occupational particulate matter exposure among informal electronic-waste recyclers in Ghana. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2022; 32:2406-2424. [PMID: 34404291 DOI: 10.1080/09603123.2021.1969007] [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: 05/28/2021] [Accepted: 08/12/2021] [Indexed: 06/13/2023]
Abstract
This study examined the associations between PM (2.5 and 10) and global DNA methylation among 100 e-waste workers and 51 non-e-waste workers serving as controls. Long interspersed nucleotide repetitive elements-1 (LINE-1) was measured by pyrosequencing. Personal PM2.5 and PM10 were measured over a 4-hour work-shift using real-time particulate monitors incorporated into a backpack . Linear regression models were used to assess the association between PM and LINE-1 DNA methylation. The concentrations of PM2.5 and PM10 were significantly higher among the e-waste workers than the controls (77.32 vs 34.88, p < 0.001 and 210.21 vs 121.92, p < 0.001, respectively). PM2.5 exposure was associated with increased LINE-1 CpG2 DNA methylation (β = 0.003; 95% CI; 0.001, 0.006; p = 0.022) but not with the average of all 4 CpG sites of LINE-1. In summary, high levels of PM2.5 exposure was associated with increased levels of global DNA methylation in a site-specific manner.
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Affiliation(s)
- Ibrahim Issah
- Department of Biological, Environmental and Occupational Health Sciences, University of Ghana, School of Public Health, Accra, Ghana
| | - John Arko-Mensah
- Department of Biological, Environmental and Occupational Health Sciences, University of Ghana, School of Public Health, Accra, Ghana
| | - Laura S Rozek
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Katie Rentschler
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Thomas P Agyekum
- Department of Biological, Environmental and Occupational Health Sciences, University of Ghana, School of Public Health, Accra, Ghana
| | - Duah Dwumoh
- Department of Biostatistics, University of Ghana School of Public Health, Legon, Ghana
| | - Stuart Batterman
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Thomas G Robins
- Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI, USA
| | - Julius N Fobil
- Department of Biological, Environmental and Occupational Health Sciences, University of Ghana, School of Public Health, Accra, Ghana
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Russo V, Lallo E, Munnia A, Spedicato M, Messerini L, D’Aurizio R, Ceroni EG, Brunelli G, Galvano A, Russo A, Landini I, Nobili S, Ceppi M, Bruzzone M, Cianchi F, Staderini F, Roselli M, Riondino S, Ferroni P, Guadagni F, Mini E, Peluso M. Artificial Intelligence Predictive Models of Response to Cytotoxic Chemotherapy Alone or Combined to Targeted Therapy for Metastatic Colorectal Cancer Patients: A Systematic Review and Meta-Analysis. Cancers (Basel) 2022; 14:4012. [PMID: 36011003 PMCID: PMC9406544 DOI: 10.3390/cancers14164012] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/26/2022] [Accepted: 08/12/2022] [Indexed: 12/24/2022] Open
Abstract
Tailored treatments for metastatic colorectal cancer (mCRC) have not yet completely evolved due to the variety in response to drugs. Therefore, artificial intelligence has been recently used to develop prognostic and predictive models of treatment response (either activity/efficacy or toxicity) to aid in clinical decision making. In this systematic review, we have examined the ability of learning methods to predict response to chemotherapy alone or combined with targeted therapy in mCRC patients by targeting specific narrative publications in Medline up to April 2022 to identify appropriate original scientific articles. After the literature search, 26 original articles met inclusion and exclusion criteria and were included in the study. Our results show that all investigations conducted on this field have provided generally promising results in predicting the response to therapy or toxic side-effects. By a meta-analytic approach we found that the overall weighted means of the area under the receiver operating characteristic (ROC) curve (AUC) were 0.90, 95% C.I. 0.80-0.95 and 0.83, 95% C.I. 0.74-0.89 in training and validation sets, respectively, indicating a good classification performance in discriminating response vs. non-response. The calculation of overall HR indicates that learning models have strong ability to predict improved survival. Lastly, the delta-radiomics and the 74 gene signatures were able to discriminate response vs. non-response by correctly identifying up to 99% of mCRC patients who were responders and up to 100% of patients who were non-responders. Specifically, when we evaluated the predictive models with tests reaching 80% sensitivity (SE) and 90% specificity (SP), the delta radiomics showed an SE of 99% and an SP of 94% in the training set and an SE of 85% and SP of 92 in the test set, whereas for the 74 gene signatures the SE was 97.6% and the SP 100% in the training set.
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Affiliation(s)
- Valentina Russo
- Research and Development Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy
| | - Eleonora Lallo
- Research and Development Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy
| | - Armelle Munnia
- Research and Development Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy
| | - Miriana Spedicato
- Research and Development Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy
| | - Luca Messerini
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | - Romina D’Aurizio
- Institute of Informatics and Telematics, National Research Council, 56124 Pisa, Italy
| | - Elia Giuseppe Ceroni
- Institute of Informatics and Telematics, National Research Council, 56124 Pisa, Italy
| | - Giulia Brunelli
- Institute of Informatics and Telematics, National Research Council, 56124 Pisa, Italy
| | - Antonio Galvano
- Department of Surgical, Oncological and Oral Sciences, University of Palermo, 90127 Palermo, Italy
| | - Antonio Russo
- Department of Surgical, Oncological and Oral Sciences, University of Palermo, 90127 Palermo, Italy
| | - Ida Landini
- Department of Health Sciences, University of Florence, 50139 Florence, Italy
| | - Stefania Nobili
- Department of Neurosciences, Imaging and Clinical Sciences, “G. D’Annunzio” Chieti-Pescara, 66100 Chieti, Italy
| | - Marcello Ceppi
- Clinical Epidemiology Unit, IRCCS-Ospedale Policlinico San Martino, 16131 Genova, Italy
| | - Marco Bruzzone
- Clinical Epidemiology Unit, IRCCS-Ospedale Policlinico San Martino, 16131 Genova, Italy
| | - Fabio Cianchi
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | - Fabio Staderini
- Department of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy
| | - Mario Roselli
- Medical Oncology Unit, Department of Systems Medicine, Tor Vergata University, 00133 Rome, Italy
| | - Silvia Riondino
- Medical Oncology Unit, Department of Systems Medicine, Tor Vergata University, 00133 Rome, Italy
| | - Patrizia Ferroni
- BioBIM (InterInstitutional Multidisciplinary Biobank), IRCCS San Raffaele Roma, 00166 Rome, Italy
- Department of Human Sciences & Quality of Life Promotion, San Raffaele Roma Open University, 00166 Rome, Italy
| | - Fiorella Guadagni
- BioBIM (InterInstitutional Multidisciplinary Biobank), IRCCS San Raffaele Roma, 00166 Rome, Italy
- Department of Human Sciences & Quality of Life Promotion, San Raffaele Roma Open University, 00166 Rome, Italy
| | - Enrico Mini
- Department of Health Sciences, University of Florence, 50139 Florence, Italy
| | - Marco Peluso
- Research and Development Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy
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Indumathi B, Oruganti SS, Sreenu B, Kutala VK. Association of Promoter Methylation and Expression of Inflammatory Genes IL-6 and TNF-α with the Risk of Coronary Artery Disease in Diabetic and Obese Subjects among Asian Indians. Indian J Clin Biochem 2022; 37:29-39. [PMID: 35125691 PMCID: PMC8799818 DOI: 10.1007/s12291-020-00932-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 10/20/2020] [Indexed: 01/03/2023]
Abstract
The inflammatory cytokines such as interleukin-6 (IL-6) and tumour necrosis factor-alpha (TNF-α) are considered as the most important contributors to the endothelial dysfunction in subjects with type 2 diabetes mellitus (T2DM) and obesity. The hypomethylation of CpG sites in the promoter region of the IL-6 and TNF-α have shown to be associated with the increased expression of IL-6 and TNF-α. However, there are no studies on the methylation and expression of IL-6 and TNF-α with the risk of coronary artery disease (CAD) in subjects with T2DM and obesity in Asian Indians. Hence, the present study was aimed to investigate whether the IL-6, TNF-α promoter methylation and expression in blood leukocyte DNA is associated with the risk of CAD in diabetic and obese subjects in Asian Indians. For this study, we recruited 574 subjects which includes, 207 angiographically confirmed CAD patients, 100 T2DM patients, 82 obese subjects and 185 healthy controls. The methylation status of IL-6 and TNF-α gene loci was determined by methylation specific PCR (MPCR) and gene expression was determined by qPCR. We found significant hypomethylation of IL-6 in CAD and T2DM subjects (OR 1.98 95% CI: 1.32-2.97, p = 0.001, OR: 2.23 95% CI:1.34-3.76, p = 0.001, respectively). Further, a significant increase in the expression of IL-6 in CAD and T2DM subjects (fold change: 26.39 & 14.7, p = 0.0001) compared to the control subjects was observed. A significant increase in the hypomethylation of TNF-α in CAD, T2DM and obese subjects was observed as compared to the control (OR: 2.04 95% CI: 1.36-3.05, p = 0.0005, OR: 1.81 95% CI 1.10-2.96, p = 0.01, and OR: 2.1 95% CI 1.24-3.57, p = 0.007, respectively).We also found an increased expression of TNF-α in CAD, T2DM and obese subjects as compared to controls. In addition, presence of low folate, and hyperhomocysteinemia was observed in the present study, may be the contributing factors for the hypomethylation of IL-6 and TNF-α and oxidative stress. In conclusion, increased expression of IL-6 and TNF-α due to hypomethylation in T2DM and obese individuals may contribute to CAD risk in these subjects. The presence of hyperhomocysteinemia and increased oxidative risk may enhance the CAD risk further.
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Affiliation(s)
- Bobbala Indumathi
- Department of Clinical Pharmacology& Therapeutics, Nizam’s Institute of Medical Sciences, Punjagutta, Hyderabad, India
| | - Sai Satish Oruganti
- Department of Cardiology, Nizam’s Institute of Medical Sciences, Hyderabad, India
| | - Boddupally Sreenu
- Department of Clinical Pharmacology& Therapeutics, Nizam’s Institute of Medical Sciences, Punjagutta, Hyderabad, India
| | - Vijay Kumar Kutala
- Department of Clinical Pharmacology& Therapeutics, Nizam’s Institute of Medical Sciences, Punjagutta, Hyderabad, India
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Yadav S, Longkumer I, Garg PR, Joshi S, Rajkumari S, Devi NK, Saraswathy KN. Association of air pollution and homocysteine with global DNA methylation: A population-based study from North India. PLoS One 2021; 16:e0260860. [PMID: 34855899 PMCID: PMC8638980 DOI: 10.1371/journal.pone.0260860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 11/17/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Anthropogenic air pollution has been implicated in aberrant changes of DNA methylation and homocysteine increase (>15μM/L). Folate (<3 ng/mL) and vitamin B12 (<220 pg/mL) deficiencies also reduce global DNA methylation via homocysteine increase. Although B-vitamin supplements can attenuate epigenetic effects of air pollution but such understanding in population-specific studies are lacking. Hence, the present study aims to understand the role of air pollution, homocysteine, and nutritional deficiencies on methylation. METHODS We examined cross-sectionally, homocysteine, folate, vitamin B12 (chemiluminescence) and global DNA methylation (colorimetric ELISA Assay) among 274 and 270 individuals from low- and high- polluted areas, respectively, from a single Mendelian population. Global DNA methylation results were obtained on 254 and 258 samples from low- and high- polluted areas, respectively. RESULTS Significant decline in median global DNA methylation was seen as a result of air pollution [high-0.84 (0.37-1.97) vs. low-0.96 (0.45-2.75), p = 0.01]. High homocysteine in combination with air pollution significantly reduced global DNA methylation [high-0.71 (0.34-1.90) vs. low-0.93 (0.45-3.00), p = 0.003]. Folate deficient individuals in high polluted areas [high-0.70 (0.37-1.29) vs. low-1.21 (0.45-3.65)] showed significantly reduced global methylation levels (p = 0.007). In low polluted areas, despite folate deficiency, if normal vitamin B12 levels were maintained, global DNA methylation levels improved significantly [2.03 (0.60-5.24), p = 0.007]. Conversely, in high polluted areas despite vitamin B12 deficiency, if normal folate status was maintained, global DNA methylation status improved significantly [0.91 (0.36-1.63)] compared to vitamin B12 normal individuals [0.54 (0.26-1.13), p = 0.04]. CONCLUSIONS High homocysteine may aggravate the effects of air pollution on DNA methylation. Vitamin B12 in low-polluted and folate in high-polluted areas may be strong determinants for changes in DNA methylation levels. The effect of air pollution on methylation levels may be reduced through inclusion of dietary or supplemented B-vitamins. This may serve as public level approach in natural settings to prevent metabolic adversities at community level.
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Affiliation(s)
- Suniti Yadav
- Laboratory of Biochemical and Molecular Anthropology, Department of Anthropology, University of Delhi, Delhi, India
| | - Imnameren Longkumer
- Laboratory of Biochemical and Molecular Anthropology, Department of Anthropology, University of Delhi, Delhi, India
| | | | - Shipra Joshi
- Manbhum Ananda Ashram Nityananda Trust-MANT, Kolkata, West Bengal, India
| | - Sunanda Rajkumari
- Laboratory of Biochemical and Molecular Anthropology, Department of Anthropology, University of Delhi, Delhi, India
| | - Naorem Kiranmala Devi
- Laboratory of Biochemical and Molecular Anthropology, Department of Anthropology, University of Delhi, Delhi, India
| | - Kallur Nava Saraswathy
- Laboratory of Biochemical and Molecular Anthropology, Department of Anthropology, University of Delhi, Delhi, India
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Ali MU, Yu Y, Yousaf B, Munir MAM, Ullah S, Zheng C, Kuang X, Wong MH. Health impacts of indoor air pollution from household solid fuel on children and women. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126127. [PMID: 34492921 DOI: 10.1016/j.jhazmat.2021.126127] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/12/2021] [Accepted: 05/12/2021] [Indexed: 05/11/2023]
Abstract
The inefficient and incomplete combustion of solid fuel (SF) is associated with high levels of indoor air pollutants leading to 3.55 million deaths annually. The risk is higher in women and children, due to their higher exposure duration and unique physical properties. The current article aims to provide a critical overview regarding the use of solid fuel, its associated pollutants, their toxicity mechanisms and, most importantly the associated health impacts, especially in women and children. Pollutants associated with SF mostly include polycyclic aromatic hydrocarbons, particulate matter, nitrous oxide, carbon monoxide and sulfur dioxide, and their concentrations are two- to threefold higher in indoor environments. These pollutants can lead to a variety of health risks by inducing different toxicity mechanisms, such as oxidative stress, DNA methylation, and gene activation. Exposed children have an increased prevalence of low birth weight, acute lower respiratory tract infections, anemia and premature mortality. On the other hand, lung cancer, chronic obstructive pulmonary disease and cardiovascular diseases are the major causes of disability and premature death in women. Indoor air pollution resulting from SF combustion is a major public health threat globally. To reduce the risks, it is important to identify future research gaps and implement effective interventions and policies.
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Affiliation(s)
- Muhammad Ubaid Ali
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, and State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China.
| | - Yangmei Yu
- Consortium on Health, Environment, Education and Research (CHEER), Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China.
| | - Balal Yousaf
- Department of Environment Engineering, Middle East Technical University, Ankara 06800, Turkey; CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China.
| | - Mehr Ahmed Mujtaba Munir
- CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China.
| | - Sami Ullah
- Department of Forestry, Shaheed Benazir Bhutto University Sheringal, Dir Upper, KPK, Pakistan.
| | - Chunmiao Zheng
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, and State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China.
| | - Xingxing Kuang
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, and State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China.
| | - Ming Hung Wong
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, and State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China; Consortium on Health, Environment, Education and Research (CHEER), Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China.
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9
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Evans L, Engelman M, Mikulas A, Malecki K. How are social determinants of health integrated into epigenetic research? A systematic review. Soc Sci Med 2021; 273:113738. [PMID: 33610974 PMCID: PMC8034414 DOI: 10.1016/j.socscimed.2021.113738] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 12/26/2020] [Accepted: 01/28/2021] [Indexed: 12/13/2022]
Abstract
OBJECTIVE We systematically review the literature on social epigenetics, examining how empirical research to date has conceptualized and operationalized social determinants of health (SDOH). METHODS Using comprehensive search procedures, we identified studies that consider the impact of SDOH on DNA methylation (DNAm), the most common measure of epigenetic change in research on human adult populations. We analyzed the studies to determine: 1) which populations and environments have been investigated in the literature; 2) how SDOH are defined and operationalized; 3) which SDOH have been linked to DNAm; and 4) what lessons from the SDOH literature can be better integrated into future studies exploring the social determinants of health and epigenetic outcomes. RESULTS We identified 67 studies, with 39 to 8397 participants. The SDOH most commonly considered were early life socioeconomic exposures and early life trauma or mental health. Our review highlights four broad challenges: a) high dependence on convenience sampling, b) limited racial/ethnic, and geographic diversity in sampling frames, c) overreliance on individual sociodemographic characteristics as proxies for broader stratification processes, and d) a focus on downstream social determinants of health and individualized experiences with social stressors. CONCLUSIONS Future social epigenetics research should prioritize larger, more diverse and representative population-based samples and employ the SDOH framework to better inform the conceptualization of research questions and interpretation of findings. In particular, the simplified depiction of race/ethnicity, gender, and socioeconomic status as individual-level characteristics should be updated with an explicit acknowledgement that these characteristics are more accurately interpreted as cues used by society to differentiate subpopulations. Social epigenetics research can then more clearly elucidate the biological consequences of these social exposures for patterns of gene expression, subsequent disease etiology, and health inequities.
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Affiliation(s)
- Linnea Evans
- Center for Health Equity Research, Northern Arizona University, USA.
| | - Michal Engelman
- Department of Sociology, University of Wisconsin-Madison, USA
| | - Alex Mikulas
- Department of Sociology, University of Wisconsin-Madison, USA
| | - Kristen Malecki
- Department of Population Health Sciences, University of Wisconsin-Madison, USA
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10
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Amadou A, Coudon T, Praud D, Salizzoni P, Leffondre K, Lévêque E, Boutron-Ruault MC, Danjou AMN, Morelli X, Le Cornet C, Perrier L, Couvidat F, Bessagnet B, Caudeville J, Faure E, Mancini FR, Gulliver J, Severi G, Fervers B. Chronic Low-Dose Exposure to Xenoestrogen Ambient Air Pollutants and Breast Cancer Risk: XENAIR Protocol for a Case-Control Study Nested Within the French E3N Cohort. JMIR Res Protoc 2020; 9:e15167. [PMID: 32930673 PMCID: PMC7525465 DOI: 10.2196/15167] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 01/14/2020] [Accepted: 01/22/2020] [Indexed: 12/24/2022] Open
Abstract
Background Breast cancer is the most frequent cancer in women in industrialized countries. Lifestyle and environmental factors, particularly endocrine-disrupting pollutants, have been suggested to play a role in breast cancer risk. Current epidemiological studies, although not fully consistent, suggest a positive association of breast cancer risk with exposure to several International Agency for Research on Cancer Group 1 air-pollutant carcinogens, such as particulate matter, polychlorinated biphenyls (PCB), dioxins, Benzo[a]pyrene (BaP), and cadmium. However, epidemiological studies remain scarce and inconsistent. It has been proposed that the menopausal status could modify the relationship between pollutants and breast cancer and that the association varies with hormone receptor status. Objective The XENAIR project will investigate the association of breast cancer risk (overall and by hormone receptor status) with chronic exposure to selected air pollutants, including particulate matter, nitrogen dioxide (NO2), ozone (O3), BaP, dioxins, PCB-153, and cadmium. Methods Our research is based on a case-control study nested within the French national E3N cohort of 5222 invasive breast cancer cases identified during follow-up from 1990 to 2011, and 5222 matched controls. A questionnaire was sent to all participants to collect their lifetime residential addresses and information on indoor pollution. We will assess these exposures using complementary models of land-use regression, atmospheric dispersion, and regional chemistry-transport (CHIMERE) models, via a Geographic Information System. Associations with breast cancer risk will be modeled using conditional logistic regression models. We will also study the impact of exposure on DNA methylation and interactions with genetic polymorphisms. Appropriate statistical methods, including Bayesian modeling, principal component analysis, and cluster analysis, will be used to assess the impact of multipollutant exposure. The fraction of breast cancer cases attributable to air pollution will be estimated. Results The XENAIR project will contribute to current knowledge on the health effects of air pollution and identify and understand environmental modifiable risk factors related to breast cancer risk. Conclusions The results will provide relevant evidence to governments and policy-makers to improve effective public health prevention strategies on air pollution. The XENAIR dataset can be used in future efforts to study the effects of exposure to air pollution associated with other chronic conditions. International Registered Report Identifier (IRRID) DERR1-10.2196/15167
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Affiliation(s)
- Amina Amadou
- Department of Prevention Cancer Environment, Centre Léon Bérard, Lyon, France.,Inserm UA 08 Radiations: Défense, Santé, Environnement, Lyon, France
| | - Thomas Coudon
- Department of Prevention Cancer Environment, Centre Léon Bérard, Lyon, France.,Ecole Centrale de Lyon, INSA, Université Claude Bernard Lyon 1, Ecully, France
| | - Delphine Praud
- Department of Prevention Cancer Environment, Centre Léon Bérard, Lyon, France.,Inserm UA 08 Radiations: Défense, Santé, Environnement, Lyon, France
| | - Pietro Salizzoni
- Ecole Centrale de Lyon, INSA, Université Claude Bernard Lyon 1, Ecully, France
| | - Karen Leffondre
- ISPED, Inserm U1219, Bordeaux Population Health Center, Université de Bordeaux, Bordeaux, France
| | - Emilie Lévêque
- ISPED, Inserm U1219, Bordeaux Population Health Center, Université de Bordeaux, Bordeaux, France
| | - Marie-Christine Boutron-Ruault
- Centre de Recherche en Epidémiologie et Santé des Populations (CESP, Inserm U1018), Faculté de Médecine, Université Paris-Saclay, Villejuif, France
| | - Aurélie M N Danjou
- Department of Prevention Cancer Environment, Centre Léon Bérard, Lyon, France
| | - Xavier Morelli
- Department of Prevention Cancer Environment, Centre Léon Bérard, Lyon, France
| | - Charlotte Le Cornet
- Department of Prevention Cancer Environment, Centre Léon Bérard, Lyon, France.,Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Lionel Perrier
- Univ Lyon, Centre Léon Bérard, GATE L-SE UMR 5824, Lyon, France
| | - Florian Couvidat
- National Institute for industrial Environment and Risks (INERIS), Verneuil-en-Halatte, France
| | - Bertrand Bessagnet
- National Institute for industrial Environment and Risks (INERIS), Verneuil-en-Halatte, France
| | - Julien Caudeville
- National Institute for industrial Environment and Risks (INERIS), Verneuil-en-Halatte, France
| | - Elodie Faure
- Department of Prevention Cancer Environment, Centre Léon Bérard, Lyon, France
| | - Francesca Romana Mancini
- Centre de Recherche en Epidémiologie et Santé des Populations (CESP, Inserm U1018), Faculté de Médecine, Université Paris-Saclay, Villejuif, France
| | - John Gulliver
- Centre for Environmental Health and Sustainability, School of Geography, Geology and the Environment, University of Leicester, Leicester, United Kingdom
| | - Gianluca Severi
- Centre de Recherche en Epidémiologie et Santé des Populations (CESP, Inserm U1018), Faculté de Médecine, Université Paris-Saclay, Villejuif, France
| | - Béatrice Fervers
- Department of Prevention Cancer Environment, Centre Léon Bérard, Lyon, France.,Inserm UA 08 Radiations: Défense, Santé, Environnement, Lyon, France
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11
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Ligation-Mediated Polymerase Chain Reaction Detection of 8-Oxo-7,8-Dihydro-2'-Deoxyguanosine and 5-Hydroxycytosine at the Codon 176 of the p53 Gene of Hepatitis C-Associated Hepatocellular Carcinoma Patients. Int J Mol Sci 2020; 21:ijms21186753. [PMID: 32942546 PMCID: PMC7555735 DOI: 10.3390/ijms21186753] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/11/2020] [Accepted: 09/11/2020] [Indexed: 12/30/2022] Open
Abstract
Molecular mechanisms underlying Hepatitis C virus (HCV)-associated hepatocellular carcinoma (HCC) pathogenesis are still unclear. Therefore, we analyzed the levels of 8-oxo-7,8-dihydro-2′-deoxyguanosine (8-oxodG) and other oxidative lesions at codon 176 of the p53 gene, as well as the generation of 3-(2-deoxy-β-d-erythro-pentafuranosyl)pyrimido[1,2-α]purin-10(3H)-one deoxyguanosine (M1dG), in a cohort of HCV-related HCC patients from Italy. Detection of 8-oxodG and 5-hydroxycytosine (5-OHC) was performed by ligation mediated-polymerase chain reaction assay, whereas the levels of M1dG were measured by chromatography and mass-spectrometry. Results indicated a significant 130% excess of 8-oxodG at –TGC– position of p53 codon 176 in HCV-HCC cases as compared to controls, after correction for age and gender, whereas a not significant increment of 5-OHC at –TGC– position was found. Then, regression models showed an 87% significant excess of M1dG in HCV-HCC cases relative to controls. Our study provides evidence that increased adduct binding does not occur randomly on the sequence of the p53 gene but at specific sequence context in HCV-HCC patients. By-products of lipid peroxidation could also yield a role in HCV-HCC development. Results emphasize the importance of active oxygen species in inducing nucleotide lesions at a p53 mutational hotspot in HCV-HCC patients living in geographical areas without dietary exposure to aflatoxin B1.
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12
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Cellai F, Bonassi S, Cristaudo A, Bonotti A, Neri M, Ceppi M, Bruzzone M, Milić M, Munnia A, Peluso M. Chromatographic Detection of 8-Hydroxy-2'-Deoxyguanosine in Leukocytes of Asbestos Exposed Workers for Assessing Past and Recent Carcinogen Exposures. Diagnostics (Basel) 2020; 10:E239. [PMID: 32326213 PMCID: PMC7235992 DOI: 10.3390/diagnostics10040239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/15/2020] [Accepted: 04/18/2020] [Indexed: 11/16/2022] Open
Abstract
Asbestos fibers include a group of silicate minerals that occur in the environment and are widely employed in occupational settings. Asbestos exposure has been associated to various chronic diseases; such as pulmonary fibrosis; mesothelioma; and lung cancer; often characterized by a long period of latency. Underlying mechanisms that are behind the carcinogenic effect of asbestos have not been fully clarified. Therefore; we have conducted an epidemiological study to evaluate the relationship between 8-hydroxy-2'-deoxyguanosine (8-oxodG), one of the most reliable biomarkers of oxidative stress and oxidative DNA damage; and asbestos exposure in the peripheral blood of residents in Tuscany and Liguria regions; Italy; stratified by occupational exposure to this carcinogen. Levels of 8-oxodG were expressed such as relative adduct labeling (RAL); the frequency of 8-oxodG per 105 deoxyguanosine was significantly higher among exposed workers with respect to the controls; i.e., 3.0 ± 0.2 Standard Error (SE) in asbestos workers versus a value of 1.3 ± 0.1 (SE) in unexposed controls (p < 0.001). When the relationship with occupational history was investigated; significant higher levels of 8-oxodG were measured in current and former asbestos workers vs. healthy controls; 3.1 ± 0.3 (SE) and 2.9 ± 0.2 (SE), respectively. After stratification for occupational history; a significant 194% excess of adducts was found in workers with 10 or more years of past asbestos exposure (p < 0.001). 8-oxodG can be used for medical surveillance programs of cohorts of workers with past and recent exposures to carcinogens for the identification of subjects requiring a more intense clinical surveillance.
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Affiliation(s)
- Filippo Cellai
- Cancer Risk Factor Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy; (F.C.); (A.M.)
| | - Stefano Bonassi
- Clinical and Molecular Epidemiology, IRCCS San Raffaele Pisana, 00166 Rome, Italy; (S.B.); (M.N.)
- Department of Human Sciences and Quality of Life Promotion, San Raffaele University, 00166 Rome, Italy
| | - Alfonso Cristaudo
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, 56010 Pisa, Italy;
- Occupational Medicine Unit, University of Pisa, 56010 Pisa, Italy;
| | | | - Monica Neri
- Clinical and Molecular Epidemiology, IRCCS San Raffaele Pisana, 00166 Rome, Italy; (S.B.); (M.N.)
| | - Marcello Ceppi
- Unit of Clinical Epidemiology, IRCCS Ospedale Policlinico San Martino, 16131 Genoa, Italy; (M.C.); (M.B.)
| | - Marco Bruzzone
- Unit of Clinical Epidemiology, IRCCS Ospedale Policlinico San Martino, 16131 Genoa, Italy; (M.C.); (M.B.)
| | - Mirta Milić
- Mutagenesis Unit, Institute for Medical Research and Occupational Health, 10000 Zagreb, Croatia;
| | - Armelle Munnia
- Cancer Risk Factor Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy; (F.C.); (A.M.)
| | - Marco Peluso
- Cancer Risk Factor Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139 Florence, Italy; (F.C.); (A.M.)
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13
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Yang CF, Karmaus WJJ, Yang CC, Chen ML, Wang IJ. Bisphenol a Exposure, DNA Methylation, and Asthma in Children. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17010298. [PMID: 31906378 PMCID: PMC6981376 DOI: 10.3390/ijerph17010298] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 12/16/2019] [Accepted: 12/19/2019] [Indexed: 12/29/2022]
Abstract
Epidemiological studies have reported the relationship between bisphenol A (BPA) exposure and increased prevalence of asthma, but the mechanisms remain unclear. Here, we investigated whether BPA exposure and DNA methylation related to asthma in children. We collected urinary and blood samples from 228 children (Childhood Environment and Allergic Diseases Study cohort) aged 3 years. Thirty-three candidate genes potentially interacting with BPA exposure were selected from a toxicogenomics database. DNA methylation was measured in 22 blood samples with top-high and bottom-low exposures of BPA. Candidate genes with differential methylation levels were validated by qPCR and promoter associated CpG islands have been investigated. Correlations between the methylation percentage and BPA exposure and asthma were analyzed. According to our findings, MAPK1 showed differential methylation and was further investigated in 228 children. Adjusting for confounders, urinary BPA glucuronide (BPAG) level inversely correlated with MAPK1 promoter methylation (β = -0.539, p = 0.010). For the logistic regression analysis, MAPK1 methylation status was dichotomized into higher methylated and lower methylated groups with cut off continuous variable of median of promoter methylation percentage (50%) while performing the analysis. MAPK1 methylation was lower in children with asthma than in children without asthma (mean ± SD; 69.82 ± 5.88% vs. 79.82 ± 5.56%) (p = 0.001). Mediation analysis suggested that MAPK1 methylation acts as a mediation variable between BPA exposure and asthma. The mechanism of BPA exposure on childhood asthma might, therefore, be through the alteration of MAPK1 methylation. The mechanism of BPA exposure on childhood asthma might, therefore, be through the alteration of MAPK1 methylation.
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Affiliation(s)
- Chia-Feng Yang
- Department of Pediatrics, Taipei Veterans General Hospital, Taipei 112, Taiwan;
- Institute of Environmental and Occupational Health Sciences, National Yang-Ming University, Taipei 112, Taiwan; (C.-C.Y.); (M.-L.C.)
| | - Wilfried J. J. Karmaus
- Division of Epidemiology, Biostatistics, and Environmental Health, School of Public Health, University of Memphis, Memphis, TN 38152, USA;
| | - Chen-Chang Yang
- Institute of Environmental and Occupational Health Sciences, National Yang-Ming University, Taipei 112, Taiwan; (C.-C.Y.); (M.-L.C.)
| | - Mei-Lien Chen
- Institute of Environmental and Occupational Health Sciences, National Yang-Ming University, Taipei 112, Taiwan; (C.-C.Y.); (M.-L.C.)
| | - I-Jen Wang
- Department of Pediatrics, Taipei Hospital, Ministry of Health and Welfare, Taipei 242, Taiwan
- School of Medicine, National Yang-Ming University, Taipei 112, Taiwan
- College of Public Health, China Medical University, Taichung 400-439, Taiwan
- National Institutes of Environmental Health Sciences, National Health Research Institutes, Miaoli 35053,Taiwan
- Correspondence: ; Tel.: +886-2-2276-5566 (ext. 2532); Fax: +886-2-2998-8028
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14
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Cellai F, Capacci F, Sgarrella C, Poli C, Arena L, Tofani L, Giese RW, Peluso M. A Cross-Sectional Study on 3-(2-Deoxy-β-D-Erythro-Pentafuranosyl)Pyrimido[1,2-α]Purin-10(3H)-One Deoxyguanosine Adducts among Woodworkers in Tuscany, Italy. Int J Mol Sci 2019; 20:ijms20112763. [PMID: 31195682 PMCID: PMC6600535 DOI: 10.3390/ijms20112763] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 05/30/2019] [Accepted: 06/05/2019] [Indexed: 12/14/2022] Open
Abstract
Occupational exposure to wood dust has been estimated to affect 3.6 million workers within the European Union (EU). The most serious health effect caused by wood dust is the nasal and sinonasal cancer (SNC), which has been observed predominantly among woodworkers. Free radicals produced by inflammatory reactions as a consequence of wood dust could play a major role in SNC development. Therefore, we investigated the association between wood dust and oxidative DNA damage in the cells of nasal epithelia, the target site of SNC. We have analyzed oxidative DNA damage by determining the levels of 3-(2-deoxy-β-D-erythro-pentafuranosyl)pyrimido[1,2-α]purin-10(3H)-one deoxyguanosine (M1dG), a major-peroxidation-derived DNA adduct and a biomarker of cancer risk in 136 woodworkers compared to 87 controls in Tuscany, Italy. We then examined the association of M1dG with co-exposure to volatile organic compounds (VOCs), exposure length, and urinary 15-F2t isoprostane (15-F2t-IsoP), a biomarker of oxidant status. Wood dust at the workplace was estimated by the Information System for Recording Occupational Exposures to Carcinogens. M1dG was measured using 32P-postlabeling and mass spectrometry. 15-F2t-IsoP was analyzed using ELISA. Results show a significant excess of M1dG in the woodworkers exposed to average levels of 1.48 mg/m3 relative to the controls. The overall mean ratio (MR) between the woodworkers and the controls was 1.28 (95% C.I. 1.03-1.58). After stratification for smoking habits and occupational status (exposure to wood dust alone and co-exposure to VOCs), the association of M1dG with wood dust (alone) was even greater in non-smokers workers, MR of 1.43 (95% C.I. 1.09-1.87). Conversely, not consistent results were found in ex-smokers and current smokers. M1dG was significantly associated with co-exposure to VOCs, MR of 1.95 (95% C.I. 1.46-2.61), and occupational history, MR of 2.47 (95% C.I. 1.67-3.62). Next, the frequency of M1dG was significantly correlated to the urinary excretion of 15-F2t-IsoP, regression coefficient (β) = 0.442 ± 0.172 (SE). Consistent with the hypothesis of a genotoxic mechanism, we observed an enhanced frequency of M1dG adducts in woodworkers, even at the external levels below the regulatory limit. Our data implement the understanding of SNC and could be useful for the management of the adverse effects caused by this carcinogen.
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Affiliation(s)
- Filippo Cellai
- Cancer Factor Risk Branch, Regional Cancer Prevention Laboratory, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), 50139 Florence, Italy.
| | - Fabio Capacci
- Functional Unit for Prevention, Health and Safety in the Workplace, ASL10, 50139 Florence, Italy.
| | - Carla Sgarrella
- Functional Unit for Prevention, Health and Safety in the Workplace, ASL10, 50139 Florence, Italy.
| | - Carla Poli
- Department of Prevention, Azienda USL Toscana Centro, 50139 Florence, Italy.
| | - Luciano Arena
- Department of Prevention, Azienda USL Toscana Centro, 50139 Florence, Italy.
| | - Lorenzo Tofani
- Department of Neurosciences, Psychology, Drug Research and Child Health, University of Florence, 50139 Florence, Italy.
| | - Roger W Giese
- Bouve College of Health Sciences, Barnett Institute, Northeastern University, Northeastern University, Boston, MA 02115, USA.
| | - Marco Peluso
- Cancer Factor Risk Branch, Regional Cancer Prevention Laboratory, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), 50139 Florence, Italy.
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15
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Bono R, Capacci F, Cellai F, Sgarrella C, Bellisario V, Trucco G, Tofani L, Peluso A, Poli C, Arena L, Piro S, Miligi L, Munnia A, Peluso M. Wood dust and urinary 15-F 2t isoprostane in Italian industry workers. ENVIRONMENTAL RESEARCH 2019; 173:300-305. [PMID: 30939330 DOI: 10.1016/j.envres.2019.03.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 03/22/2019] [Accepted: 03/23/2019] [Indexed: 06/09/2023]
Abstract
Wood dust is one of the most common occupational exposures, with about 3.6 million of workers in the wood industry in Europe. Wood particles can deposit in the nose and the respiratory tract and cause adverse health effects. Occupational exposure to wood dust has been associated with malignant tumors of the nasal cavity and paranasal sinuses. The induction of oxidative stress and the generation of reactive oxygen species through activation of inflammatory cells could have a role in the carcinogenicity of respirable wood dust. Therefore, we conducted a cross-sectional study to evaluate the prevalence of urinary 15-F2t isoprostane (15-F2t-IsoP), a biomarker of oxidative stress and peroxidation of lipids, in 123 wood workers compared to 57 unexposed controls living in Tuscany region, Italy. 15-F2t-IsoP generation was measured by ELISA. The main result of the present study showed that a statistically significant excess of this biomarker occurred in the workers exposed to 1.48 mg/m3 of airborne wood dust with respect to the unexposed controls. The overall mean ratio (MR) between the workers exposed to wood dust and the controls was 1.36, 95% Confidence Interval (C.I.) 1.18-1.57, after correction for age and smoking habits. A significant increment of 15-F2t-IsoP (43%) was observed in the smokers as compared to the non-smokers. The urinary excretion of 15-F2t-IsoP was significantly associated with co-exposure to organic solvents, i.e., MR of 1.41, 95% C.I. 1.17-1.70, after adjustment for age and smoking habits. A 41% excess was observed in long-term wood workers, 95% C.I. 1.14-1.75. Multivariate regression analysis showed that the level of 15-F2t-IsoP was linearly correlated to the length of exposure, regression coefficient (β) = 0.244 ± 0.002 (SE). The overall increment by exposure group persisted after stratification for smoking habits. For instance, in smokers, a 53% excess was detected in the wood workers as compared to the controls, 95% C.I. 1.23-1.91. Our data support the hypothesis that oxidative stress and lipid peroxidation can have a role in the toxicity of wood dust F2-IsoP measure can be a tool for the evaluation of the effectiveness of targeted interventions aimed to reduce exposures to environmental carcinogens.
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Affiliation(s)
- Roberto Bono
- Department of Public Health and Pediatrics, University of Turin, Italy
| | - Fabio Capacci
- Functional Unit for Prevention, Health and Safety in the Workplace, ASL10, Florence, Italy
| | - Filippo Cellai
- Cancer Factor Risk Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139, Florence, Italy
| | - Carla Sgarrella
- Functional Unit for Prevention, Health and Safety in the Workplace, ASL10, Florence, Italy
| | | | - Giulia Trucco
- Department of Public Health and Pediatrics, University of Turin, Italy
| | - Lorenzo Tofani
- Department of Neurosciences, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | | | - Carla Poli
- Department of Prevention, ASL11, Empoli, Florence, Italy
| | - Luciano Arena
- Department of Prevention, ASL11, Empoli, Florence, Italy
| | - Sara Piro
- Unit of Environmental and Occupational Epidemiology, ISPRO-Study, Prevention and Oncology Network Institute, 50139, Florence, Italy
| | - Lucia Miligi
- Unit of Environmental and Occupational Epidemiology, ISPRO-Study, Prevention and Oncology Network Institute, 50139, Florence, Italy
| | - Armelle Munnia
- Cancer Factor Risk Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139, Florence, Italy
| | - Marco Peluso
- Cancer Factor Risk Branch, Regional Cancer Prevention Laboratory, ISPRO-Study, Prevention and Oncology Network Institute, 50139, Florence, Italy.
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Ma B, Stepanov I, Hecht SS. Recent Studies on DNA Adducts Resulting from Human Exposure to Tobacco Smoke. TOXICS 2019; 7:E16. [PMID: 30893918 PMCID: PMC6468371 DOI: 10.3390/toxics7010016] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 03/09/2019] [Accepted: 03/13/2019] [Indexed: 12/22/2022]
Abstract
DNA adducts are believed to play a central role in the induction of cancer in cigarette smokers and are proposed as being potential biomarkers of cancer risk. We have summarized research conducted since 2012 on DNA adduct formation in smokers. A variety of DNA adducts derived from various classes of carcinogens, including aromatic amines, polycyclic aromatic hydrocarbons, tobacco-specific nitrosamines, alkylating agents, aldehydes, volatile carcinogens, as well as oxidative damage have been reported. The results are discussed with particular attention to the analytical methods used in those studies. Mass spectrometry-based methods that have higher selectivity and specificity compared to 32P-postlabeling or immunochemical approaches are preferred. Multiple DNA adducts specific to tobacco constituents have also been characterized for the first time in vitro or detected in vivo since 2012, and descriptions of those adducts are included. We also discuss common issues related to measuring DNA adducts in humans, including the development and validation of analytical methods and prevention of artifact formation.
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Affiliation(s)
- Bin Ma
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Irina Stepanov
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Stephen S Hecht
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA.
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Dual Effect of IL-6 -174 G/C Polymorphism and Promoter Methylation in the Risk of Coronary Artery Disease Among South Indians. Indian J Clin Biochem 2018; 34:180-187. [PMID: 31092991 DOI: 10.1007/s12291-018-0740-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 02/08/2018] [Indexed: 02/07/2023]
Abstract
Inflammation plays an important role in the pathogenesis of atherosclerosis and coronary syndromes; moreover, various lines of evidence suggest that genetic factors do contribute to the risk of coronary artery disease (CAD). The proinflammatory cytokine IL-6 is a central mediator of inflammation associated with CAD. The present study is aimed to investigate the association of single nucleotide polymorphism in the promoter region of the IL-6 gene (-174 G > C) and methylation with the susceptibility of CAD. Genotyping of IL-6 -174 G/C polymorphism was performed by PCR-RFLP. Methylation-specific PCR method was used to study the IL-6 gene promoter methylation. Analysis of 470 subjects (265 CAD patients and 205 controls) showed association of the -174 G/C variant with the CAD risk in dominant model (OR 1.58, 95% CI, 1.024-2.23, P = 0.04). Further, the analysis of the distribution of genotypes and alleles of -174 G > C polymorphism according to clinical features of CAD, revealed significant association of genotype and allele (OR 1.86, 95% CI 1.18-2.84 P = 0.01, and OR 1.71, 95% CI 1.09-2.23 P = 0.02 respectively) with diabetes, and we found no association with hypertension (OR 0.95, 95% CI 0.57-1.59, P = 0.8). We also analyzed the methylation status of IL-6 promoter region between cases and controls showed significant hypo methylation in CAD subjects (OR 2.36, 95% CI 1.51-4.259, P = 0.006). Additionally, GC, CC genotypes and C allele carriers show hypomethylation in CAD cases compared to controls (54.58 vs. 76.85%, 29.83 vs. 40% respectively). In conclusion, the promoter polymorphism -174 G/C is associated with CAD risk and further carriers of 'C' allele at -174 locus showed significant hypo methylation which could contribute to increased risk of CAD. The present study highlights the association of allele and genotypes with differential DNA methylation of CpG islands in the IL-6 promoter region which may affect IL-6 gene regulation.
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Callahan CL, Bonner MR, Nie J, Han D, Wang Y, Tao MH, Shields PG, Marian C, Eng KH, Trevisan M, Beyea J, Freudenheim JL. Lifetime exposure to ambient air pollution and methylation of tumor suppressor genes in breast tumors. ENVIRONMENTAL RESEARCH 2018; 161:418-424. [PMID: 29197760 PMCID: PMC5747980 DOI: 10.1016/j.envres.2017.11.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Revised: 11/21/2017] [Accepted: 11/22/2017] [Indexed: 06/01/2023]
Abstract
BACKGROUND We previously reported increased risk of breast cancer associated with early life exposure to two measures of air pollution exposure, total suspended particulates (TSP) and traffic emissions (TE), possible proxies for exposure to polycyclic aromatic hydrocarbons (PAHs). Exposure to PAHs has been shown to be associated with aberrant patterns of DNA methylation in peripheral blood of healthy individuals. Exposure to PAHs and methylation in breast tumor tissue has received little attention. We examined the association of early life exposure to TSP and TE with patterns of DNA methylation in breast tumors. METHODS We conducted a study of women enrolled in the Western New York Exposures and Breast Cancer (WEB) Study. Methylation of nine genes (SFN, SCGB3A1, RARB, GSTP1, CDKN2A CCND2, BRCA1, FHIT, and SYK) was assessed using bisulfite-based pyrosequencing. TSP exposure at each woman's home address at birth, menarche, and when she had her first child was estimated. TE exposure was modeled for each woman's residence at menarche, her first birth, and twenty and ten years prior to diagnosis. Unconditional logistic regression was employed to estimate odds ratios (OR) of having methylation greater than the median value, adjusting for age, secondhand smoke exposure before age 20, current smoking status, and estrogen receptor status. RESULTS Exposure to higher TSP at a woman's first birth was associated with lower methylation of SCGB3A1 (OR = 0.48, 95% CI: 0.23-0.99) and higher methylation of SYK (OR = 1.86, 95% CI: 1.03-3.35). TE at menarche was associated with increased methylation of SYK (OR = 2.37, 95% CI: 1.05-5.33). TE at first birth and ten years prior to diagnosis was associated with decreased methylation of CCND2 (OR ten years prior to diagnosis=0.48, 95% CI: 0.26-0.89). Although these associations were nominally significant, none were significant after adjustment for multiple comparisons (p < 0.01). CONCLUSIONS We observed suggestive evidence that exposure to ambient air pollution throughout life, measured as TSP and TE, may be associated with DNA methylation of some tumor suppressor genes in breast tumor tissue. Future studies with a larger sample size that assess methylation of more sites are warranted.
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Affiliation(s)
- Catherine L Callahan
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, United States.
| | - Matthew R Bonner
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, United States
| | - Jing Nie
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, United States
| | - Daikwon Han
- Department of Epidemiology and Biostatistics, Texas A&M Texas A&M University, College Station, TX, United States
| | - Youjin Wang
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, United States
| | - Meng-Hua Tao
- Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, Fort Worth, TX, United States
| | - Peter G Shields
- Division of Cancer Prevention and Control, College of Medicine and The Ohio State University Comprehensive Cancer Center, Columbus, OH, United States
| | - Catalin Marian
- Division of Cancer Prevention and Control, College of Medicine and The Ohio State University Comprehensive Cancer Center, Columbus, OH, United States; Department of Biochemistry and Pharmacology, University of Medicine an Pharmacy Timisoara, Timisoara, Romania
| | - Kevin H Eng
- Department of Biostatistics and Bioinformatics, Roswell Park Cancer Institute, Buffalo, NY, United States
| | | | - Jan Beyea
- Consulting in the Public Interest, Lambertville, NJ, United States
| | - Jo L Freudenheim
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY, United States
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Bind MA, VanderWeele TJ, Schwartz JD, Coull BA. Quantile causal mediation analysis allowing longitudinal data. Stat Med 2017; 36:4182-4195. [PMID: 28786129 PMCID: PMC5788575 DOI: 10.1002/sim.7423] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Revised: 05/20/2017] [Accepted: 06/29/2017] [Indexed: 12/16/2022]
Abstract
Mediation analysis has mostly been conducted with mean regression models. With this approach modeling means, formulae for direct and indirect effects are based on changes in means, which may not capture effects that occur in units at the tails of mediator and outcome distributions. Individuals with extreme values of medical endpoints are often more susceptible to disease and can be missed if one investigates mean changes only. We derive the controlled direct and indirect effects of an exposure along percentiles of the mediator and outcome using quantile regression models and a causal framework. The quantile regression models can accommodate an exposure-mediator interaction and random intercepts to allow for longitudinal mediator and outcome. Because DNA methylation acts as a complex "switch" to control gene expression and fibrinogen is a cardiovascular factor, individuals with extreme levels of these markers may be more susceptible to air pollution. We therefore apply this methodology to environmental data to estimate the effect of air pollution, as measured by particle number, on fibrinogen levels through a change in interferon-gamma (IFN-γ) methylation. We estimate the controlled direct effect of air pollution on the qth percentile of fibrinogen and its indirect effect through a change in the pth percentile of IFN-γ methylation. We found evidence of a direct effect of particle number on the upper tail of the fibrinogen distribution. We observed a suggestive indirect effect of particle number on the upper tail of the fibrinogen distribution through a change in the lower percentiles of the IFN-γ methylation distribution.
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Affiliation(s)
- M-A Bind
- Department of Statistics, Harvard University, Cambridge, MA, U.S.A
| | - T J VanderWeele
- Epidemiology, Harvard School of Public Health, Boston, MA, U.S.A
| | - J D Schwartz
- Environmental Health, Harvard School of Public Health, Boston, MA, U.S.A
| | - B A Coull
- Department of Biostatistics, Harvard School of Public Health, Boston, MA, U.S.A
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In vitro hydroquinone-induced instauration of histone bivalent mark on human retroelements (LINE-1) in HL60 cells. Toxicol In Vitro 2016; 40:1-10. [PMID: 27979589 DOI: 10.1016/j.tiv.2016.12.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 12/07/2016] [Accepted: 12/11/2016] [Indexed: 12/28/2022]
Abstract
Benzene is extensively used in industry despite its leukemogenic activity, representing a significant occupational hazard. We investigated if long-term treatment with low-doses hydroquinone (HQ), a benzene metabolite, might be sufficient to alter in vitro the epigenetic signature underlining LINE-1 sequences, a poorly explored step in health risks associated with benzene exposure. In HL-60 cell line, exploring the epigenetic events occurring in chromatin, we found the transient instauration of the distinctive signature combining the repressive H3Lys27 tri-methylation mark and the activating H3Lys4 tri-methylation mark (H3K27me3/H3K4me3), indicating a tendency toward a poised chromatin conformation. These alterations are lost in time after short-term treatments, while the long-term setting, performed using a concentration within the levels of total HQ in peripheral blood of benzene-exposed workers, showed a gradual increase in H3K4me3. We observed the absence of statistically significant variations in DNA methylation and expression levels of LINE-1, despite a decrease in protein levels of UHRF1, DNA methyl-transferases and histone methyl-transferases. In conclusion, in vitro treatment with low-dose HQ determined the instauration of a reversible poised state of chromatin in LINE-1 sequences, suggesting that prolonged exposure could cause persistent epigenetic alterations.
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21
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The integration of epigenetics and genetics in nutrition research for CVD risk factors. Proc Nutr Soc 2016; 76:333-346. [DOI: 10.1017/s0029665116000823] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
There is increasing evidence documenting gene-by-environment (G × E) interactions for CVD related traits. However, the underlying mechanisms are still unclear. DNA methylation may represent one of such potential mechanisms. The objective of this review paper is to summarise the current evidence supporting the interplay among DNA methylation, genetic variants, and environmental factors, specifically (1) the association between SNP and DNA methylation; (2) the role that DNA methylation plays in G × E interactions. The current evidence supports the notion that genotype-dependent methylation may account, in part, for the mechanisms underlying observed G × E interactions in loci such asAPOE, IL6and ATP-binding cassette A1. However, these findings should be validated using intervention studies with high level of scientific evidence. The ultimate goal is to apply the knowledge and the technology generated by this research towards genetically based strategies for the development of personalised nutrition and medicine.
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22
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Chi GC, Liu Y, MacDonald JW, Barr RG, Donohue KM, Hensley MD, Hou L, McCall CE, Reynolds LM, Siscovick DS, Kaufman JD. Long-term outdoor air pollution and DNA methylation in circulating monocytes: results from the Multi-Ethnic Study of Atherosclerosis (MESA). Environ Health 2016; 15:119. [PMID: 27903268 PMCID: PMC5131503 DOI: 10.1186/s12940-016-0202-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 11/24/2016] [Indexed: 05/24/2023]
Abstract
BACKGROUND DNA methylation may mediate effects of air pollution on cardiovascular disease. The association between long-term air pollution exposure and DNA methylation in monocytes, which are central to atherosclerosis, has not been studied. We investigated the association between long-term ambient air pollution exposure and DNA methylation (candidate sites and global) in monocytes of adults (aged ≥55). METHODS One-year average ambient fine particulate matter (PM2.5) and oxides of nitrogen (NOX) concentrations were predicted at participants' (n = 1,207) addresses using spatiotemporal models. We assessed DNA methylation in circulating monocytes at 1) 2,713 CpG sites associated with mRNA expression of nearby genes and 2) probes mapping to Alu and LINE-1 repetitive elements (surrogates for global DNA methylation) using Illumina's Infinium HumanMethylation450 BeadChip. We used linear regression models adjusted for demographics, smoking, physical activity, socioeconomic status, methyl-nutrients, and technical variables. For significant air pollution-associated methylation sites, we also assessed the association between expression of gene transcripts previously associated with these CpG sites and air pollution. RESULTS At a false discovery rate of 0.05, five candidate CpGs (cg20455854, cg07855639, cg07598385, cg17360854, and cg23599683) had methylation significantly associated with PM2.5 and none were associated with NOX. Cg20455854 had the smallest p-value for the association with PM2.5 (p = 2.77 × 10-5). mRNA expression profiles of genes near three of the PM2.5-associated CpGs (ANKHD1, LGALS2, and ANKRD11) were also significantly associated with PM2.5 exposure. Alu and LINE-1 methylation were not associated with long-term air pollution exposure. CONCLUSIONS We observed novel associations between long-term ambient air pollution exposure and site-specific DNA methylation, but not global DNA methylation, in purified monocytes of a multi-ethnic adult population. Epigenetic markers may provide insights into mechanisms underlying environmental factors in complex diseases like atherosclerosis.
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Affiliation(s)
- Gloria C. Chi
- Department of Epidemiology, School of Public Health, University of Washington, 1959 NE Pacific St, Box 357236, Seattle, WA 98195 USA
| | - Yongmei Liu
- Department of Epidemiology & Prevention, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, NC USA
| | - James W. MacDonald
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA USA
| | - R. Graham Barr
- Division of General Medicine, Mailman School of Public Health, Columbia University, New York, NY USA
- Division of Pulmonary, Allergy & Critical Care, Columbia University Medical Center, New York, NY USA
| | - Kathleen M. Donohue
- Division of General Medicine, Mailman School of Public Health, Columbia University, New York, NY USA
- Division of Pulmonary, Allergy & Critical Care, Columbia University Medical Center, New York, NY USA
| | - Mark D. Hensley
- Department of Epidemiology, School of Public Health, University of Washington, 1959 NE Pacific St, Box 357236, Seattle, WA 98195 USA
| | - Lifang Hou
- Department of Preventive Medicine, Division of Cancer Epidemiology and Prevention, Feinberg School of Medicine, Northwestern University, Chicago, IL USA
| | - Charles E. McCall
- Section on Molecular Medicine, Wake Forest School of Medicine, Winston-Salem, NC USA
| | - Lindsay M. Reynolds
- Department of Epidemiology & Prevention, Division of Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, NC USA
| | | | - Joel D. Kaufman
- Department of Epidemiology, School of Public Health, University of Washington, 1959 NE Pacific St, Box 357236, Seattle, WA 98195 USA
- Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, WA USA
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Zuo HP, Guo YY, Che L, Wu XZ. Hypomethylation of Interleukin-6 Promoter is Associated with the Risk of Coronary Heart Disease. Arq Bras Cardiol 2016; 107:131-6. [PMID: 27627640 PMCID: PMC5074066 DOI: 10.5935/abc.20160124] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 02/29/2016] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Interleukin-6 (IL-6) is implicated in the pathogenesis of coronary heart disease (CHD), and IL-6 expression has associated with reduced DNA methylation of its gene promoter. However, there are no data on IL-6 promoter methylation and the risk of CHD. OBJECTIVE To examine whether IL-6 promoter methylation measured in blood leukocyte DNA is associated with CHD risk. METHODS A total of 212 cases with CHD and 218 controls were enrolled. Methylation at two CpG sites in IL-6 promoter was measured by bisulfite pyrosequencing, and the mean IL-6 methylation was calculated by averaging the methylation measures of the two CpGs. RESULTS Mean methylation level in IL-6 promoter in CHD cases was significantly lower than that in controls (p = 0.023). Logistic regression analysis showed that IL-6 methylation was inversely associated with the risk of CHD. The odds ratios (ORs) of CHD for subjects in the second and first (lowest) tertile of IL-6 methylation were 1.87 (95% CI = 1.10‑3.20) and 2.01 (95% CI = 1.19-3.38) (ptrend = 0.013), respectively, compared to subjects in the third (highest) tertile. The IL-6 hypomethylation-related risk estimates tended to be stronger for acute myocardial infarction (ptrend = 0.006). CpG position-specific analysis showed that hypomethylation of position 1 conferred a more pronounced increase in CHD risk than that of position 2. CONCLUSION These findings suggest that DNA hypomethylation of IL-6 promoter is associated with the increased risk for CHD, especially for acute myocardial infarction. The two distinct CpGs in IL-6 may contribute differently to the development of CHD.
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Affiliation(s)
- Hong-Peng Zuo
- Department of Emergency, Tongji Hospital, Tongji University, Shanghai, China
| | - Ying-Yu Guo
- Department of Computed Tomography, Jilin Oilfield General Hospital, Songyuan, Jilin Province, China
| | - Lin Che
- Department of Cardiology, Tongji Hospital, Tongji University, Shanghai, China
| | - Xian-Zheng Wu
- Department of Emergency, Tongji Hospital, Tongji University, Shanghai, China
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Neven KY, Piola M, Angelici L, Cortini F, Fenoglio C, Galimberti D, Pesatori AC, Scarpini E, Bollati V. Repetitive element hypermethylation in multiple sclerosis patients. BMC Genet 2016; 17:84. [PMID: 27317098 PMCID: PMC4912727 DOI: 10.1186/s12863-016-0395-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 06/10/2016] [Indexed: 01/21/2023] Open
Abstract
Background Multiple sclerosis (MS) is a complex disorder of the central nervous system whose cause is currently unknown. Evidence is increasing that DNA methylation alterations could be involved in inflammatory and neurodegenerative diseases and could contribute to MS pathogenesis. Repetitive elements Alu, LINE-1 and SAT-α, are widely known as estimators of global DNA methylation. We investigated Alu, LINE-1 and SAT-α methylation levels to evaluate their difference in a case–control setup and their role as a marker of disability. Results We obtained blood samples from 51 MS patients and 137 healthy volunteers matched by gender, age and smoking. Methylation was assessed using bisulfite-PCR-pyrosequencing. For all participants, medical history, physical and neurological examinations and screening laboratory tests were collected. All repetitive elements were hypermethylated in MS patients compared to healthy controls. A lower Expanded Disability Status Scale (EDSS) score was associated with a lower levels of LINE-1 methylation for ‘EDSS = 1.0’ and ‘1.5 ≤ EDSS ≤ 2.5’ compared to an EDSS higher than 3, while Alu was associated with a higher level of methylation in these groups: ‘EDSS = 1.0’ and ‘1.5 ≤ EDSS ≤ 2.5’. Conclusions MS patients exhibit an hypermethylation in repetitive elements compared to healthy controls. Alu and LINE-1 were associated with degree of EDSS score. Forthcoming studies focusing on epigenetics and the multifactorial pathogenetic mechanism of MS could elucidate these links further. Electronic supplementary material The online version of this article (doi:10.1186/s12863-016-0395-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- K Y Neven
- Department of Clinical Sciences and Community Health, EPIGET - Epidemiology, Epigenetics and Toxicology Lab, Università degli Studi di Milano, Milan, Italy.,Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - M Piola
- Neurology Unit, Saronno ASST Valle Olona Hospital, Saronno, Italy
| | - L Angelici
- Department of Clinical Sciences and Community Health, EPIGET - Epidemiology, Epigenetics and Toxicology Lab, Università degli Studi di Milano, Milan, Italy
| | - F Cortini
- Department of Preventive Medicine, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Epidemiology Unit, Milan, Italy
| | - C Fenoglio
- Department of Pathophysiology and Transplantation, Dino Ferrari Centre, Università degli Studi di Milano and Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - D Galimberti
- Department of Pathophysiology and Transplantation, Dino Ferrari Centre, Università degli Studi di Milano and Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - A C Pesatori
- Department of Clinical Sciences and Community Health, EPIGET - Epidemiology, Epigenetics and Toxicology Lab, Università degli Studi di Milano, Milan, Italy.,Department of Preventive Medicine, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Epidemiology Unit, Milan, Italy
| | - E Scarpini
- Department of Pathophysiology and Transplantation, Dino Ferrari Centre, Università degli Studi di Milano and Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - V Bollati
- Department of Clinical Sciences and Community Health, EPIGET - Epidemiology, Epigenetics and Toxicology Lab, Università degli Studi di Milano, Milan, Italy. .,Department of Preventive Medicine, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Epidemiology Unit, Milan, Italy. .,Department of Clinical Sciences and Community Health, Valentina Bollati, Università degli Studi di Milano, Via San Barnaba 8, 20122, Milan, Italy.
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Bono R, Munnia A, Romanazzi V, Bellisario V, Cellai F, Peluso MEM. Formaldehyde-induced toxicity in the nasal epithelia of workers of a plastic laminate plant. Toxicol Res (Camb) 2016; 5:752-760. [PMID: 30090386 PMCID: PMC6062010 DOI: 10.1039/c5tx00478k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 02/25/2016] [Indexed: 12/14/2022] Open
Abstract
Formaldehyde is a ubiquitous volatile organic compound widely used for various industrial purposes. Formaldehyde was reclassified by the International Agency for Research on Cancer as a human carcinogen, based on sufficient evidence for a casual role for nasopharyngeal cancer. However, the mechanisms by which this compound causes nasopharyngeal cancer are not completely understood. Therefore, we have examined the formaldehyde-induced toxicity in the nasal epithelia of the workers of a plastic laminate plant in Bra, Cuneo, Piedmont region, North-Western Italy, hence in the target site for formaldehyde-related nasal carcinogenesis. We have conducted a cross-sectional study aimed at comparing the frequency of 3-(2-deoxy-β-d-erythro-pentafuranosyl)pyrimido[1,2-α]purin-10(3H)-one deoxyguanosine (M1dG) adducts, a biomarker of oxidative stress and lipid peroxidation, in 50 male exposed workers and 45 male controls using 32P-DNA post-labeling. The personal levels of formaldehyde exposure were analysed by gas-chromatography mass-spectrometry. The smoking status was estimated by measuring the concentrations of urinary cotinine by gas-chromatography mass-spectrometry. The air monitoring results showed that the exposure levels of formaldehyde were significantly greater for the plastic laminate plant workers, 211.4 ± 14.8 standard error (SE) μg m-3, than controls, 35.2 ± 3.4 (SE) μg m-3, P < 0.001. The levels of urinary cotinine were 1064 ± 118 ng ml-1 and 14.18 ± 2.5 ng ml-1 in smokers and non-smokers, respectively, P < 0.001. The M1dG adduct frequency per 108 normal nucleotides was significantly higher among the workers of the plastic laminate plant exposed to formaldehyde, 111.6 ± 14.3 (SE), compared to controls, 49.6 ± 3.4 (SE), P < 0.001. This significant association persisted also when personal dosimeters were used to measure the extent of indoor levels of formaldehyde exposure. No influences of smoking and age were observed across the study population. However, after categorization for occupational exposure, a significant effect was found in the controls, P = 0.018, where the levels of DNA damage were significantly correlated with the levels of urinary cotinine, regression coefficient (β) = 0.494 ± 0.000 (SE), P < 0.002. Our findings indicated that M1dG adducts constitute a potential mechanism of formaldehyde-induced toxicity. Persistent DNA damage contributes to the general decline of the physiological mechanisms designed to maintain cellular homeostasis.
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Affiliation(s)
- Roberto Bono
- Department of Public Health and Pediatrics, University of Turin , Turin , Italy
| | - Armelle Munnia
- Cancer Risk Factor Branch , Cancer Prevention Laboratory , ISPO-Cancer Prevention and Research Institute , Florence , Italy .
| | - Valeria Romanazzi
- Department of Public Health and Pediatrics, University of Turin , Turin , Italy
| | - Valeria Bellisario
- Department of Public Health and Pediatrics, University of Turin , Turin , Italy
| | - Filippo Cellai
- Cancer Risk Factor Branch , Cancer Prevention Laboratory , ISPO-Cancer Prevention and Research Institute , Florence , Italy .
| | - Marco E M Peluso
- Cancer Risk Factor Branch , Cancer Prevention Laboratory , ISPO-Cancer Prevention and Research Institute , Florence , Italy .
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Characteristics of DNA methylation changes induced by traffic-related air pollution. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2015; 796:46-53. [PMID: 26778509 DOI: 10.1016/j.mrgentox.2015.12.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/04/2015] [Accepted: 12/14/2015] [Indexed: 12/20/2022]
Abstract
Traffic-related air pollution (TRAP) is a potential risk factor for numerous respiratory disorders, including lung cancer, while alteration of DNA methylation may be one of the underlying mechanisms. However, the effects of TRAP mixtures on DNA methylation have not been investigated. We have studied the effects of brief or prolonged TRAP exposures on DNA methylation in the rat. The exposures were performed in spring and autumn, with identical study procedures. In each season, healthy Wistar rats were exposed to TRAP at for 4 h, 7 d, 14 d, or 28 d. Global DNA methylation (LINE-1 and Alu) and specific gene methylation (p16(CDKN2A), APC, and iNOS) in the DNA from blood and lung tissues were quantified by pyrosequencing. Multiple linear regression was applied to assess the influence of air pollutants on DNA methylation levels. The levels of PM2.5, PM10, and NO2 in the high and moderate groups were significantly higher than in the control group. The DNA methylation levels were not significantly different between spring and autumn. When spring and autumn data were analyzed together, PM2.5, PM10, and NO2 exposures were associated with changes in%5mC (95% CI) in LINE-1, iNOS, p16(CDKN2A), and APC ranging from -0.088 (-0.150, -0.026) to 0.102 (0.049, 0.154) per 1 μg/m(3) increase in the pollutant concentration. Prolonged exposure to a high level of TRAP was negatively associated with LINE-1 and iNOS methylation, and positively associated with APC methylations in the DNA from lung tissues but not blood. These findings show that TRAP exposure is associated with decreased methylation of LINE-1 and iNOS, and increased methylation of p16(CDKN2A) and APC.
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White AJ, Chen J, McCullough LE, Xu X, Cho YH, Teitelbaum SL, Neugut AI, Terry MB, Hibshoosh H, Santella RM, Gammon MD. Polycyclic aromatic hydrocarbon (PAH)-DNA adducts and breast cancer: modification by gene promoter methylation in a population-based study. Cancer Causes Control 2015; 26:1791-802. [PMID: 26407953 DOI: 10.1007/s10552-015-0672-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 09/16/2015] [Indexed: 12/19/2022]
Abstract
PURPOSE Polycyclic aromatic hydrocarbon (PAH)-DNA adducts have been associated with breast cancer incidence. Aberrant changes in DNA methylation may be an early event in carcinogenesis. However, possible relations between PAH-DNA adducts, methylation, and breast cancer are unknown. The objectives of this study were to (1) assess associations between PAH-DNA adducts, and breast cancer, stratified by DNA methylation markers and (2) examine interactions between adducts and DNA methylation in association with breast cancer and tumor subtype. METHODS In a population-based case-control study, promoter methylation of 13 breast cancer-related genes was measured in tumor tissue (n = 765-851 cases). Blood DNA from breast cancer cases (n = 873) and controls (n = 941) was used to assess PAH-DNA adducts and global methylation. Logistic regression was used to estimate adjusted odds ratios (ORs) and 95% confidence intervals (CI); and the ratio of the OR (ROR) was used to assess heterogeneity. RESULTS Women with detectable PAH-DNA adducts and methylated RARβ (ROR 2.69, 95% CI 1.02-7.12; p for interaction = 0.03) or APC (ROR 1.76, 95% CI 0.87-3.58; p for interaction = 0.09) genes were more likely to have hormone receptor-positive tumors than other subtypes. Interactions with other methylation markers were not apparent (p ≥ 0.10). The association between adducts and breast cancer did not vary by methylation status of the tumor nor did adducts associate with global methylation in the controls. CONCLUSIONS Gene-specific methylation of RARβ, and perhaps APC, may interact with PAH-DNA adducts to increase risk of hormone receptor-positive breast cancer. There was little evidence that adducts were associated with or interacted with other methylation markers of interest.
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Affiliation(s)
- Alexandra J White
- Department of Epidemiology, University of North Carolina, CB#7435, McGavran-Greenberg Hall, Chapel Hill, NC, 27599-7435, USA.
| | - Jia Chen
- Departments of Preventive Medicine, Ichan School of Medicine at Mt. Sinai, New York, NY, USA.,Departments of Oncological Science, Ichan School of Medicine at Mt. Sinai, New York, NY, USA.,Departments of Pediatrics, Ichan School of Medicine at Mt. Sinai, New York, NY, USA
| | - Lauren E McCullough
- Department of Epidemiology, University of North Carolina, CB#7435, McGavran-Greenberg Hall, Chapel Hill, NC, 27599-7435, USA
| | - Xinran Xu
- Research Center for Translational Medicine, Shanghai East Hospital of Tongji University School of Medicine, Shanghai, China
| | - Yoon Hee Cho
- Department of Environmental Health Sciences, Columbia University, New York, NY, USA
| | - Susan L Teitelbaum
- Departments of Preventive Medicine, Ichan School of Medicine at Mt. Sinai, New York, NY, USA
| | - Alfred I Neugut
- Department of Epidemiology, Columbia University, New York, NY, USA.,Department of Medicine, Columbia University, New York, NY, USA
| | - Mary Beth Terry
- Department of Epidemiology, Columbia University, New York, NY, USA
| | | | - Regina M Santella
- Department of Environmental Health Sciences, Columbia University, New York, NY, USA
| | - Marilie D Gammon
- Department of Epidemiology, University of North Carolina, CB#7435, McGavran-Greenberg Hall, Chapel Hill, NC, 27599-7435, USA
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Environmental Impact on DNA Methylation in the Germline: State of the Art and Gaps of Knowledge. BIOMED RESEARCH INTERNATIONAL 2015; 2015:123484. [PMID: 26339587 PMCID: PMC4538313 DOI: 10.1155/2015/123484] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 05/03/2015] [Indexed: 12/19/2022]
Abstract
The epigenome consists of chemical changes in DNA and chromatin that without modifying the DNA sequence modulate gene expression and cellular phenotype. The epigenome is highly plastic and reacts to changing external conditions with modifications that can be inherited to daughter cells and across generations. Whereas this innate plasticity allows for adaptation to a changing environment, it also implies the potential of epigenetic derailment leading to so-called epimutations. DNA methylation is the most studied epigenetic mark. DNA methylation changes have been associated with cancer, infertility, cardiovascular, respiratory, metabolic, immunologic, and neurodegenerative pathologies. Experiments in rodents demonstrate that exposure to a variety of chemical stressors, occurring during the prenatal or the adult life, may induce DNA methylation changes in germ cells, which may be transmitted across generations with phenotypic consequences. An increasing number of human biomonitoring studies show environmentally related DNA methylation changes mainly in blood leukocytes, whereas very few data have been so far collected on possible epigenetic changes induced in the germline, even by the analysis of easily accessible sperm. In this paper, we review the state of the art on factors impinging on DNA methylation in the germline, highlight gaps of knowledge, and propose priorities for future studies.
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Miousse IR, Chalbot MCG, Lumen A, Ferguson A, Kavouras IG, Koturbash I. Response of transposable elements to environmental stressors. MUTATION RESEARCH. REVIEWS IN MUTATION RESEARCH 2015; 765:19-39. [PMID: 26281766 PMCID: PMC4544780 DOI: 10.1016/j.mrrev.2015.05.003] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 05/27/2015] [Accepted: 05/28/2015] [Indexed: 12/21/2022]
Abstract
Transposable elements (TEs) comprise a group of repetitive sequences that bring positive, negative, as well as neutral effects to the host organism. Earlier considered as "junk DNA," TEs are now well-accepted driving forces of evolution and critical regulators of the expression of genetic information. Their activity is regulated by epigenetic mechanisms, including methylation of DNA and histone modifications. The loss of epigenetic control over TEs, exhibited as loss of DNA methylation and decondensation of the chromatin structure, may result in TEs reactivation, initiation of their insertional mutagenesis (retrotransposition) and has been reported in numerous human diseases, including cancer. Accumulating evidence suggests that these alterations are not the simple consequences of the disease, but often may drive the pathogenesis, as they can be detected early during disease development. Knowledge derived from the in vitro, in vivo, and epidemiological studies, clearly demonstrates that exposure to ubiquitous environmental stressors, many of which are carcinogens or suspected carcinogens, are capable of causing alterations in methylation and expression of TEs and initiate retrotransposition events. Evidence summarized in this review suggests that TEs are the sensitive endpoints for detection of effects caused by such environmental stressors, as ionizing radiation (terrestrial, space, and UV-radiation), air pollution (including particulate matter [PM]-derived and gaseous), persistent organic pollutants, and metals. Furthermore, the significance of these effects is characterized by their early appearance, persistence and presence in both, target organs and peripheral blood. Altogether, these findings suggest that TEs may potentially be introduced into safety and risk assessment and serve as biomarkers of exposure to environmental stressors. Furthermore, TEs also show significant potential to become invaluable surrogate biomarkers in clinic and possible targets for therapeutic modalities for disease treatment and prevention.
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Affiliation(s)
- Isabelle R Miousse
- Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | - Marie-Cecile G Chalbot
- Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | - Annie Lumen
- Division of Biochemical Toxicology, National Center for Toxicological Research, US Food and Drug Administration, Jefferson, AR 72079, USA.
| | - Alesia Ferguson
- Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | - Ilias G Kavouras
- Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
| | - Igor Koturbash
- Department of Environmental and Occupational Health, Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
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Rerkasem K, Rattanatanyong P, Rerkasem A, Wongthanee A, Rungruengthanakit K, Mangklabruks A, Mutirangura A. Higher Alu methylation levels in catch-up growth in twenty-year-old offsprings. PLoS One 2015; 10:e0120032. [PMID: 25807557 PMCID: PMC4373937 DOI: 10.1371/journal.pone.0120032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 01/31/2015] [Indexed: 11/23/2022] Open
Abstract
Alu elements and long interspersed element-1 (LINE-1 or L1) are two major human intersperse repetitive sequences. Lower Alu methylation, but not LINE-1, has been observed in blood cells of people in old age, and in menopausal women having lower bone mass and osteoporosis. Nevertheless, Alu methylation levels also vary among young individuals. Here, we explored phenotypes at birth that are associated with Alu methylation levels in young people. In 2010, 249 twenty-years-old volunteers whose mothers had participated in a study association between birth weight (BW) and nutrition during pregnancy in 1990, were invited to take part in our present study. In this study, the LINE-1 and Alu methylation levels and patterns were measured in peripheral mononuclear cells and correlated with various nutritional parameters during intrauterine and postnatal period of offspring. This included the amount of maternal intake during pregnancy, the mother’s weight gain during pregnancy, birth weight, birth length, and the rate of weight gain in the first year of life. Catch-up growth (CUG) was defined when weight during the first year was >0.67 of the standard score, according to WHO data. No association with LINE-1 methylation was identified. The mean level of Alu methylation in the CUG group was significantly higher than those non-CUG (39.61% and 33.66 % respectively, P < 0.0001). The positive correlation between the history of CUG in the first year and higher Alu methylation indicates the role of Alu methylation, not only in aging cells, but also in the human growth process. Moreover, here is the first study that demonstrated the association between a phenotype during the newborn period and intersperse repetitive sequences methylation during young adulthood.
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Affiliation(s)
- Kittipan Rerkasem
- Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand; The Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - Prakasit Rattanatanyong
- Center of Excellence of Molecular Genetics of Cancer and Human Diseases, Department of Anatomy, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - Amaraporn Rerkasem
- Department of Surgery, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Antika Wongthanee
- The Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, Thailand
| | | | - Ampica Mangklabruks
- The Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, Thailand; Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Apiwat Mutirangura
- Center of Excellence of Molecular Genetics of Cancer and Human Diseases, Department of Anatomy, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
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Peluso MEM, Munnia A, Giese RW, Chellini E, Ceppi M, Capacci F. Oxidatively damaged DNA in the nasal epithelium of workers occupationally exposed to silica dust in Tuscany region, Italy. Mutagenesis 2015; 30:519-25. [PMID: 25771384 DOI: 10.1093/mutage/gev014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
UNLABELLED Chronic silica exposure has been associated to cancer and silicosis. Furthermore, the induction of oxidative stress and the generation of reactive oxygen species have been indicated to play a main role in the carcinogenicity of respirable silica. Therefore, we conducted a cross-sectional study to evaluate the prevalence of 3-(2-deoxy-β-D-erythro-pentafuranosyl)pyrimido[1,2-α]purin-10(3H)-one deoxyguanosine (M1dG) adducts, a biomarker of oxidative stress and peroxidation of lipids, in the nasal epithelium of 135 silica-exposed workers, employed in pottery, ceramic and marble manufacturing plants as well as in a stone quarry, in respect to 118 controls living in Tuscany region, Italy. The M1dG generation was measured by the (32)P-postlabelling assay. Significant higher levels of M1dG adducts per 10(8) normal nucleotides were observed in the nasal epithelium of smokers, 77.9±9.8 (SE), and in those of former smokers, 80.7±9.7 (SE), as compared to non-smokers, 57.1±6.2 (SE), P = 0.001 and P = 0.004, respectively. Significant increments of M1dG adducts were found in the nasal epithelium of workers that handle artificial marble conglomerates, 184±36.4 (SE), and in those of quarry workers, 120±34.7 (SE), with respect to controls, 50.6±2.7 (SE), P = 0.014 and P < 0.001, respectively. Null increments were observed in association with the pottery and the ceramic factories. After stratification for different exposures, silica-exposed workers that were co-exposed to organic solvents, and welding and exhaust fumes have significantly higher M1dG levels, 90.4±13.4 (SE), P = 0.014 vs. CONTROL Our data suggested that silica exposure might be associated with genotoxicity in the nasal epithelial cells of silica-exposed workers that handle of artificial marble conglomerates and quarry workers. Importantly, we observed that co-exposures to other respiratory carcinogens may have contributed to enhance the burden of M1dG adducts in the nasal epithelium of silica-exposed workers.
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Affiliation(s)
- Marco E M Peluso
- Cancer Risk Factor Branch, Cancer Prevention Laboratories, Cancer Prevention and Research Institute, Via Cosimo il Vecchio 2, Florence, Italy, Department of Pharmaceutical Sciences in the Bouve College of Health Sciences, Barnett Institute, Northeastern University, 360 Huntington Avenue, Boston, MA, USA, Environmental and Occupational Epidemiology Unit, Cancer Prevention and Research Institute, Via delle Oblate 4, Florence, Italy, IRCSS San Martino Hospital - National Cancer Research Institute, Largo R. Benzi 10, Genoa 16132, Italy and Functional Unit for Prevention, Health and Safety in the Workplace, ASL10, Via della Cupola 64, Florence, Italy
| | - Armelle Munnia
- Cancer Risk Factor Branch, Cancer Prevention Laboratories, Cancer Prevention and Research Institute, Via Cosimo il Vecchio 2, Florence, Italy, Department of Pharmaceutical Sciences in the Bouve College of Health Sciences, Barnett Institute, Northeastern University, 360 Huntington Avenue, Boston, MA, USA, Environmental and Occupational Epidemiology Unit, Cancer Prevention and Research Institute, Via delle Oblate 4, Florence, Italy, IRCSS San Martino Hospital - National Cancer Research Institute, Largo R. Benzi 10, Genoa 16132, Italy and Functional Unit for Prevention, Health and Safety in the Workplace, ASL10, Via della Cupola 64, Florence, Italy
| | - Roger W Giese
- Department of Pharmaceutical Sciences in the Bouve College of Health Sciences, Barnett Institute, Northeastern University, 360 Huntington Avenue, Boston, MA, USA
| | - Elisabetta Chellini
- Environmental and Occupational Epidemiology Unit, Cancer Prevention and Research Institute, Via delle Oblate 4, Florence, Italy
| | - Marcello Ceppi
- IRCSS San Martino Hospital - National Cancer Research Institute, Largo R. Benzi 10, Genoa 16132, Italy and
| | - Fabio Capacci
- Functional Unit for Prevention, Health and Safety in the Workplace, ASL10, Via della Cupola 64, Florence, Italy
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Peluso MEM, Munnia A, Giese RW, Catelan D, Rocca S, Farigu S, Leoni A, Bruzzone M, Ceppi M, Biggeri A. Exocyclic DNA adducts in sheep with skeletal fluorosis resident in the proximity of the Portoscuso-Portovesme industrial estate on Sardinia Island, Italy. Toxicol Res (Camb) 2015. [DOI: 10.1039/c5tx00045a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The mechanisms by which fluoride produces its toxic effects are still not clear.
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Affiliation(s)
- Marco E. M. Peluso
- Cancer Risk Factor Branch
- ISPO-Cancer Prevention and Research Institute
- Florence
- Italy
| | - Armelle Munnia
- Cancer Risk Factor Branch
- ISPO-Cancer Prevention and Research Institute
- Florence
- Italy
| | - Roger W. Giese
- Department of Pharmaceutical Sciences in the Bouve College of Health Sciences
- Barnett Institute
- Northeastern University
- Boston, Massachusetts
- USA
| | - Dolores Catelan
- Department of Statistics “G. Parenti”
- University of Florence
- Florence
- Italy
- Biostatistic Unit
| | - Stefano Rocca
- Department of Veterinary Medicine
- University of Sassari
- Sassari
- Italy
| | - Serafina Farigu
- Department of Veterinary Medicine
- University of Sassari
- Sassari
- Italy
| | - Antonio Leoni
- Department of Veterinary Medicine
- University of Sassari
- Sassari
- Italy
| | - Marco Bruzzone
- IRCSS San Martino Hospital – National Cancer Research Institute
- Genoa
- Italy
| | - Marcello Ceppi
- IRCSS San Martino Hospital – National Cancer Research Institute
- Genoa
- Italy
| | - Annibale Biggeri
- Department of Statistics “G. Parenti”
- University of Florence
- Florence
- Italy
- Biostatistic Unit
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Taghizadeh S, Najmabadi H, Kamali K, Behjati F. Evaluation of chromosomal aberrations caused by air pollutants in some taxi drivers from two polluted districts of urban Tehran and its comparison with drivers from rural areas of Lahijan: a pilot study. JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE & ENGINEERING 2014; 12:144. [PMID: 25606343 PMCID: PMC4299125 DOI: 10.1186/s40201-014-0144-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 12/06/2014] [Indexed: 06/04/2023]
Abstract
BACKGROUND Chromosome instability is the most common form of genomic instability. Genomic instability can lead to tumorogenesis. High level of chromosomal aberrations in peripheral blood lymphocytes can be used as a biomarker for cancer. Air pollution is one of the most important factors that cause chromosomal instability (CIN). In this comparative study we used classic Cytogenetic technique to analyze the effects of air pollutants on chromosome stability. We collected peripheral blood from 30 taxi drivers of two polluted districts (districts 6 and 7) in Tehran and 30 taxi drivers from rural areas of Lahijan, north of Iran. RESULTS Comparison of the level of chromosome breakage in the two groups showed an increased level of chromosome breakage in the drivers from polluted districts of Tehran, although not significant, using Fisher exact test (p-value = 0.300). However, the overall chromosome aberration rate (including both chromosome and chromatid gaps), the difference was significant using Chi-square test (p-value = 0.012). CONCLUSION An increased level of chromosome aberration was present in the drivers from polluted districts of Tehran compared to drivers from non-polluted areas in Lahijan.
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Affiliation(s)
- Sara Taghizadeh
- />Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Hossein Najmabadi
- />Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Koorosh Kamali
- />Department of Public Health, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Farkhondeh Behjati
- />Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
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Tao MH, Zhou J, Rialdi AP, Martinez R, Dabek J, Scelo G, Lissowska J, Chen J, Boffetta P. Indoor air pollution from solid fuels and peripheral blood DNA methylation: findings from a population study in Warsaw, Poland. ENVIRONMENTAL RESEARCH 2014; 134:325-30. [PMID: 25199973 DOI: 10.1016/j.envres.2014.08.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 08/06/2014] [Accepted: 08/15/2014] [Indexed: 06/03/2023]
Abstract
DNA methylation is a potential mechanism linking indoor air pollution to adverse health effects. Fetal and early-life environmental exposures have been associated with altered DNA methylation and play a critical role in progress of diseases in adulthood. We investigated whether exposure to indoor air pollution from solid fuels at different lifetime periods was associated with global DNA methylation and methylation at the IFG2/H19 imprinting control region (ICR) in a population-based sample of non-smoking women from Warsaw, Poland. Global methylation and IFG2/H19 ICR methylation were assessed in peripheral blood DNA from 42 non-smoking women with Luminometric Methylation Assay (LUMA) and quantitative pyrosequencing, respectively. Linear regression models were applied to estimate associations between indoor air pollution and DNA methylation in the blood. Compared to women without exposure, the levels of LUMA methylation for women who had ever exposed to both coal and wood were reduced 6.70% (95% CI: -13.36, -0.04). Using both coal and wood before age 20 was associated with 6.95% decreased LUMA methylation (95% CI: -13.79, -0.11). Further, the negative correlations were more significant with exposure to solid fuels for cooking before age 20. There were no clear associations between indoor solid fuels exposure before age 20 and through the lifetime and IFG2/H19 ICR methylation. Our study of non-smoking women supports the hypothesis that exposure to indoor air pollution from solid fuels, even early-life exposure, has the capacity to modify DNA methylation that can be detected in peripheral blood.
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Affiliation(s)
- Meng-Hua Tao
- Institute for Translational Epidemiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States; Department of Biostatistics and Epidemiology, University of North Texas Health Science Center, Fort Worth, TX 76107, United States.
| | - Jiachen Zhou
- Institute for Translational Epidemiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States
| | - Alexander P Rialdi
- Department of Community and Preventive Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States
| | - Regina Martinez
- Department of Biochemistry, Baylor University, Waco, TX 76798, United States
| | - Joanna Dabek
- Department of Cancer Epidemiology and Prevention, Cancer Center and M. Sklodowska-Curie Memorial Institute of Oncology, Warsaw 02781, Poland
| | - Ghislaine Scelo
- Section of Genetic Epidemiology, International Agency for Research on Cancer, Lyon 69372, France
| | - Jolanta Lissowska
- Department of Cancer Epidemiology and Prevention, Cancer Center and M. Sklodowska-Curie Memorial Institute of Oncology, Warsaw 02781, Poland
| | - Jia Chen
- Department of Community and Preventive Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States; Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States; Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States; Ruttenberg Cancer Center, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States
| | - Paolo Boffetta
- Institute for Translational Epidemiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States
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Møller P, Danielsen PH, Karottki DG, Jantzen K, Roursgaard M, Klingberg H, Jensen DM, Christophersen DV, Hemmingsen JG, Cao Y, Loft S. Oxidative stress and inflammation generated DNA damage by exposure to air pollution particles. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2014; 762:133-66. [DOI: 10.1016/j.mrrev.2014.09.001] [Citation(s) in RCA: 181] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 09/04/2014] [Accepted: 09/04/2014] [Indexed: 01/09/2023]
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36
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Consales C, Leter G, Bonde JPE, Toft G, Eleuteri P, Moccia T, Budillon A, Jonsson BAG, Giwercman A, Pedersen HS, Ludwicki JK, Zviezdai V, Heederik D, Spano M. Indices of methylation in sperm DNA from fertile men differ between distinct geographical regions. Hum Reprod 2014; 29:2065-72. [DOI: 10.1093/humrep/deu176] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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37
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Faulk C, Liu K, Barks A, Goodrich JM, Dolinoy DC. Longitudinal epigenetic drift in mice perinatally exposed to lead. Epigenetics 2014; 9:934-41. [PMID: 24786859 DOI: 10.4161/epi.29024] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
An understanding of the natural change in DNA methylation over time, defined as "epigenetic drift," will inform the study of environmental effects on the epigenome. This study investigates epigenetic drift in isogenic mice exposed perinatally to lead (Pb) acetate at four concentrations, 0 ppm (control), 2.1 ppm (low), 16 ppm (medium), and 32 ppm (high) prior to conception through weaning, then followed until 10 months of age. Absolute values of DNA methylation in a transposon-associated metastable locus, Cdk5-activator binding protein (Cabp(IAP)), and three imprinted loci (Igf2, Igf2r, and H19) were obtained from tail tissue in paired samples. DNA methylation levels in the controls increased over time at the imprinted Igf2 and Igf2r loci (both P = 0.0001), but not at the imprinted H19 locus or the Cabp(IAP) metastable epiallele. Pb exposure was associated with accelerated DNA hypermethylation in Cabp(IAP) (P = 0.0209) and moderated hypermethylation in Igf2r (P = 0.0447), and with marginally accelerated hypermethylation at H19 (P = 0.0847). In summary, the presence and magnitude of epigenetic drift was locus-dependent, and enhancement of drift was mediated by perinatal Pb exposure, in some, but not all, loci.
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Affiliation(s)
- Christopher Faulk
- Department of Environmental Health Sciences; University of Michigan; Ann Arbor, MI USA
| | - Kevin Liu
- Department of Environmental Health Sciences; University of Michigan; Ann Arbor, MI USA
| | - Amanda Barks
- Department of Environmental Health Sciences; University of Michigan; Ann Arbor, MI USA
| | - Jaclyn M Goodrich
- Department of Environmental Health Sciences; University of Michigan; Ann Arbor, MI USA
| | - Dana C Dolinoy
- Department of Environmental Health Sciences; University of Michigan; Ann Arbor, MI USA
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Borgie M, Garat A, Cazier F, Delbende A, Allorge D, Ledoux F, Courcot D, Shirali P, Dagher Z. Traffic-related air pollution. A pilot exposure assessment in Beirut, Lebanon. CHEMOSPHERE 2014; 96:122-128. [PMID: 24184043 DOI: 10.1016/j.chemosphere.2013.09.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 07/28/2013] [Accepted: 09/09/2013] [Indexed: 06/02/2023]
Abstract
Traffic-related volatile organic compounds (VOCs) pollution has frequently been demonstrated to be a serious problem in the developing countries. Benzene and 1,3-butadiene (BD) have been classified as a human carcinogen based on evidence for an increased genotoxic and epigenotoxic effects in both occupational exposure assessment and in vivo/in vitro studies. We have undertaken a biomonitoring of 25 traffic policemen and 23 office policemen in Beirut, through personal air monitoring, assessed by diffusive samplers, as well as through the use of biomarkers of exposure to benzene and BD. Personal benzene, toluene, ethylbenzene, and xylene (BTEX) exposure were quantified by GC-MS/MS, urinary trans, trans-muconic acid (t,t-MA) by HPLC/UV, S-phenyl mercapturic acid (S-PMA), monohydroxy-butenyl mercapturic acid (MHBMA) and dihydroxybutyl mercapturic acid (DHBMA) by ultra-performance liquid chromatography-electrospray tandem mass spectrometry (UPLC/ESI(-)-MS/MS) in MRM (Multiple Reaction Monitoring) mode. We found that individual exposure to benzene in the traffic policemen was higher than that measured in traffic policemen in Prague, in Bologna, in Ioannina and in Bangkok. t,t-MA levels could distinguish between office and traffic policemen. However, median MHBMA levels in traffic policemen were slightly elevated, though not significantly higher than in office policemen. Alternatively, DHBMA concentrations could significantly distinguish between office and traffic policemen and showed a better correlation with personal total BTEX exposure. DHMBA, measured in the post-shift urine samples, correlated with both pre-shift MHMBA and pre-shift DHMBA. Moreover, there was not a marked effect of smoking habits on DHBMA. Taken together, these findings suggested that DHBMA is more suitable than MHBMA as biomarker of exposure to BD in humans. Traffic policemen, who are exposed to benzene and BD at the roadside in central Beirut, are potentially at a higher risk for development of diseases such as cancer than office policemen.
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Affiliation(s)
- Mireille Borgie
- Unit of Environmental Chemistry and Interactions on Living, EA 4492, University of Littoral-Côte d'Opale (ULCO), Dunkerque, France; University of Lille North of France, Lille, France; Bioactive Molecules Research Group, Doctoral School of Sciences and Technologies, Lebanese University, Lebanon
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Bind MA, Lepeule J, Zanobetti A, Gasparrini A, Baccarelli A, Coull BA, Tarantini L, Vokonas PS, Koutrakis P, Schwartz J. Air pollution and gene-specific methylation in the Normative Aging Study: association, effect modification, and mediation analysis. Epigenetics 2014; 9:448-58. [PMID: 24385016 DOI: 10.4161/epi.27584] [Citation(s) in RCA: 132] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The mechanisms by which air pollution has multiple systemic effects in humans are not fully elucidated, but appear to include inflammation and thrombosis. This study examines whether concentrations of ozone and components of fine particle mass are associated with changes in methylation on tissue factor (F3), interferon gamma (IFN-γ), interleukin 6 (IL-6), toll-like receptor 2 (TLR-2), and intercellular adhesion molecule 1 (ICAM-1). We investigated associations between air pollution exposure and gene-specific methylation in 777 elderly men participating in the Normative Aging Study (1999-2009). We repeatedly measured methylation at multiple CpG sites within each gene's promoter region and calculated the mean of the position-specific measurements. We examined intermediate-term associations between primary and secondary air pollutants and mean methylation and methylation at each position with distributed-lag models. Increase in air pollutants concentrations was significantly associated with F3, ICAM-1, and TLR-2 hypomethylation, and IFN-γ and IL-6 hypermethylation. An interquartile range increase in black carbon concentration averaged over the four weeks prior to assessment was associated with a 12% reduction in F3 methylation (95% CI: -17% to -6%). For some genes, the change in methylation was observed only at specific locations within the promoter region. DNA methylation may reflect biological impact of air pollution. We found some significant mediated effects of black carbon on fibrinogen through a decrease in F3 methylation, and of sulfate and ozone on ICAM-1 protein through a decrease in ICAM-1 methylation.
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Affiliation(s)
- Marie-Abele Bind
- Department of Environmental Health; Harvard School of Public Health; Boston, MA USA; Department of Biostatistics; Harvard School of Public Health; Boston, MA USA
| | - Johanna Lepeule
- Department of Environmental Health; Harvard School of Public Health; Boston, MA USA
| | - Antonella Zanobetti
- Department of Environmental Health; Harvard School of Public Health; Boston, MA USA
| | - Antonio Gasparrini
- Department of Medical Statistics; London School of Hygiene and Tropical Medicine; London, UK
| | - Andrea Baccarelli
- Department of Environmental Health; Harvard School of Public Health; Boston, MA USA
| | - Brent A Coull
- Department of Biostatistics; Harvard School of Public Health; Boston, MA USA
| | - Letizia Tarantini
- Center of Molecular and Genetic Epidemiology; University of Milan; Milan, Italy
| | - Pantel S Vokonas
- VA Boston Healthcare System and the Department of Medicine; Boston University School of Medicine; Boston, MA USA
| | - Petros Koutrakis
- Department of Environmental Health; Harvard School of Public Health; Boston, MA USA
| | - Joel Schwartz
- Department of Environmental Health; Harvard School of Public Health; Boston, MA USA
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Peluso MEM, Munnia A, Tarocchi M, Giese RW, Annaratone L, Bussolati G, Bono R. Oxidative DNA damage and formalin-fixation procedures. Toxicol Res (Camb) 2014. [DOI: 10.1039/c4tx00046c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
An experimental study on how formaldehyde-fixation is capable of inducing excess oxidative DNA damage in formalin-fixed paraffin-embedded tissues.
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Affiliation(s)
- Marco E. M. Peluso
- Cancer Risk Factor Branch
- Cancer Prevention and Research Institute
- Florence, Italy
| | - Armelle Munnia
- Cancer Risk Factor Branch
- Cancer Prevention and Research Institute
- Florence, Italy
| | - Mirko Tarocchi
- Department of Experimental and Clinical Biomedical Sciences
- University of Florence
- Florence, Italy
| | - Roger W. Giese
- Department of Pharmaceutical Sciences in the Bouve College of Health Sciences
- Barnett Institute
- Northeastern University
- Boston, USA
| | | | | | - Roberto Bono
- Department of Public Health and Pediatry
- University of Turin
- Turin, Italy
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Miao M, Zhou X, Li Y, Zhang O, Zhou Z, Li T, Yuan W, Li R, Li DK. LINE-1 hypomethylation in spermatozoa is associated with Bisphenol A exposure. Andrology 2013; 2:138-44. [PMID: 24293158 DOI: 10.1111/j.2047-2927.2013.00166.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 10/24/2013] [Accepted: 10/29/2013] [Indexed: 11/30/2022]
Abstract
Bisphenol A (BPA) is an endocrine disruptor with potentially harmful effects on humans. However, epigenetic mechanisms that modulate the effects of BPA remain unclear. Methylation of long interspersed nucleotide elements (LINE-1) is a marker of genome-wide methylation status. This study aims to examine whether BPA exposure was associated with LINE-1 methylation changes in men. Male factory workers in Hunan, China (N = 149) were studied, 77 with BPA exposure in workplace (BPA-exposed group) and 72 without BPA exposure in workplace (control group). Pre-shift and post-shift urine samples were collected from the BPA-exposed group and spot urine samples were collected from the control group. Urine samples were assessed for BPA. In addition, blood and semen samples were collected from both groups for LINE-1 methylation analysis. In multivariate analysis adjusted for age, education, smoking habits and alcohol consumption, sperm LINE-1 methylation level was significantly lower in BPA exposed workers (p < 0.001) compared to that in the unexposed workers. Linear regression analysis also showed that log-transformed urine BPA levels were inversely associated with sperm LINE-1 methylation (p < 0.0001), but not peripheral blood cell LINE-1 methylation. Moreover, the association between urine BPA level and semen quality was not attenuated after adjustments for LINE-1 level. In summary, the observed independent relationship between BPA exposure and LINE-1 methylation may have public health implications on reproductive health in men because of ubiquitous exposure to BPA.
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Affiliation(s)
- M Miao
- WHO Collaborating Center for Research in Human Reproduction, Shanghai, China; Key Laboratory of Contraceptive Drugs and Devices of NPFPC, Shanghai Institute of Planned Parenthood Research, Shanghai, China
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Peluso MEM, Munnia A, Bollati V, Srivatanakul P, Jedpiyawongse A, Sangrajrang S, Ceppi M, Giese RW, Boffetta P, Baccarelli AA. Aberrant methylation of hypermethylated-in-cancer-1 and exocyclic DNA adducts in tobacco smokers. Toxicol Sci 2013; 137:47-54. [PMID: 24154486 DOI: 10.1093/toxsci/kft241] [Citation(s) in RCA: 206] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Tobacco smoke has been shown to produce both DNA damage and epigenetic alterations. However, the potential role of DNA damage in generating epigenetic changes is largely underinvestigated in human studies. We examined the effects of smoking on the levels of DNA methylation in genes for tumor protein p53, cyclin-dependent kinase inhibitor2A, hypermethylated-in-cancer-1 (HIC1), interleukin-6, Long Interspersed Nuclear Element type1, and Alu retrotransposons in blood of 177 residents in Thailand using bisulfite-PCR andpyrosequencing. Then, we analyzed the relationship of this methylation with the oxidative DNA adduct, M₁dG (a malondialdehyde adduct), measured by ³²P-postlabeling. Multivariate statistical analyses showed that HIC1 methylation levels were significantly increased in smokers compared with nonsmokers (p ≤ .05). A dose response was observed, with the highest HIC1 methylation levels in smokers of ≥ 10 cigarettes/day relative to nonsmokers and intermediate values in smokers of 1-9 cigarettes/day (p for trend ≤ .001). No additional relationships were observed. We also evaluated correlations between M₁dG and the methylation changes at each HIC1 CpG site individually. The levels of this adduct in smokers showed a significant linear correlation with methylation at one of the 3 CpGs evaluated in HIC1: hypermethylation at position 1904864340 was significantly correlated with the adduct M₁dG (covariate-adjusted regression coefficient (β) = .224 ± .101 [SE], p ≤ .05). No other correlations were detected. Our study extends prior work by others associating hypermethylation of HIC1 with smoking; shows that a very specific hypermethylation event can arise from smoking; and encourages future studies that explore a possible role for M₁dG in connecting smoking to this latter hypermethylation.
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Affiliation(s)
- Marco E M Peluso
- * Cancer Risk Factor Branch, Cancer Prevention and Research Institute, Florence, Italy
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Peluso MEM, Munnia A, Tarocchi M, Arciello M, Balsano C, Giese RW, Galli A. Exocycilic DNA Adducts in a Murine Model of Non-alcoholic Steatohepatitis. ACTA ACUST UNITED AC 2013; 2013. [PMID: 31528500 PMCID: PMC6746424 DOI: 10.4172/2157-2518.s3-003] [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] [Indexed: 11/17/2022]
Abstract
Introduction: Non-alcoholic fatty liver disease is the most common hepatic disorder in Western countries. The transition from abnormal accumulation of lipids toward non-alcoholic steatohepatitis (NASH) represents a key step in the development of chronic liver pathologies. Oxidative stress and lipid peroxidation have often been proposed as mechanisms in the progression to steatohepatitis. Methods: We have examined the hepatic levels of exocyclic DNA adducts, indicated from 3-(2-deoxy-β-D-erythro-pentafuranosyl)pyrimido[1,2-α]purin-10(3H)-one deoxyguanosine (M1dG) adduct, a biomarker of oxidative stress and lipid peroxidation, in a murine model of NASH using the 32P-DNA postlabeling assay. Results: Our findings show that C57BL/6 mice fed with high-fat and cholesterol diet developed signs associated with NASH after eight weeks, whereas there was no evidence of steatosis in control mice. The score for steatohepatitis ranged from grade 2 to 3 for steatosis, inflammation, and fibrosis, showing that the experimental diet was able to induce pathologic alterations of the parenchyma in eight weeks. Higher levels of M1dG adducts were detected in the livers of C57BL/6 mice which developed experimental NASH after eight weeks of high-fat and cholesterol feed, 5.6 M 1dG ± 0.4 (SE) per 106 total nucleotides, as compared to control mice, 1.6 M1dG ± 0.4 (SE). The statistical analysis showed that the increment of oxidatively damaged DNA in mice with NASH raised on high-fat and cholesterol diet was statistically significant as compared to control mice, P=0.006. Conclusions: Our report suggests a link between NASH and M1dG in experimental animals fed with a diet rich in saturated fats and cholesterol. High-fat and cholesterol may act together in inducing a broader spectrum of oxidatively damaged DNA, including exocyclic DNA adducts, that may contribute to the decline of hepatocyte functions, from disturbance of critical pathways, such as transcription and replication, triggering transient or permanent cell-cycle arrest and cell-death, up to chromosomal instability.
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Affiliation(s)
- Marco E M Peluso
- Cancer Risk Factor Branch, Cancer Prevention and Research Institute, Florence, Italy
| | - Armelle Munnia
- Cancer Risk Factor Branch, Cancer Prevention and Research Institute, Florence, Italy
| | - Mirko Tarocchi
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
| | - Mario Arciello
- Department of Internal Medicine and Medical Specialties "Sapienza" University of Rome, Rome, Italy
| | - Clara Balsano
- CNR-IBPM Istituto di Biologia e Patologia Molecolare, Rome, Italy
| | - Roger W Giese
- Department of Pharmaceutical Sciences in the Bouve College of Health Sciences, Barnett Institute, Northeastern University, Boston, Massachusetts, USA
| | - Andrea Galli
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
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De Prins S, Koppen G, Jacobs G, Dons E, Van de Mieroop E, Nelen V, Fierens F, Int Panis L, De Boever P, Cox B, Nawrot TS, Schoeters G. Influence of ambient air pollution on global DNA methylation in healthy adults: a seasonal follow-up. ENVIRONMENT INTERNATIONAL 2013; 59:418-24. [PMID: 23917442 DOI: 10.1016/j.envint.2013.07.007] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 07/10/2013] [Accepted: 07/11/2013] [Indexed: 05/17/2023]
Abstract
BACKGROUND DNA methylation changes are potential pathways of environmentally induced health effects. We investigated whether exposure to ambient concentrations of NO2, PM10, PM2.5 and O3 and traffic parameters were associated with global DNA methylation in blood of healthy adults. METHODS 48 non-smoking adults (25 males) with a median age of 39years were sampled in winter and summer. Global DNA methylation in whole blood (% 5-methyl-2'-deoxycytidine, %5mdC) was analyzed with HPLC. Exposure to air pollutants at the home address was assessed using interpolated NO2, PM10, PM2.5 and O3 concentrations for various exposure windows (60- to 1-day moving average exposures and yearly averages) and GIS-based traffic parameters. Associations between pollutants and %5mdC were tested with multiple mixed effects regression models. RESULTS Average %5mdC (SD) was 4.30 (0.08) in winter and 4.29 (0.08) in summer. Men had higher %5mdC compared to women both in winter (4.32 vs. 4.26) and summer (4.31 vs. 4.27). When winter and summer data were analyzed together, various NO2, PM10 and PM2.5 moving average exposures were associated with changes in %5mdC (95% CI) ranging from -0.04 (-0.09 to 0.00) to -0.14 (-0.28 to 0.00) per IQR increase in pollutant. NO2, PM10, PM2.5 and O3 moving average exposures were associated with decreased %5mdC (95% CI) varying between -0.01 (-0.03 to 0.00) and -0.17 (-0.27 to -0.06) per IQR increase in pollutant in summer but not in winter. CONCLUSION Decreased global DNA methylation in whole blood was associated with exposure to NO2, PM10, PM2.5 and O3 at the home addresses of non- adults. Most effects were observed for the 5- to 30-day moving average exposures.
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Affiliation(s)
- Sofie De Prins
- Environmental Risk and Health unit, VITO (Flemish Institute for Technological Research), Boeretang 200, B-2400 Mol, Belgium.
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Byun HM, Motta V, Panni T, Bertazzi PA, Apostoli P, Hou L, Baccarelli AA. Evolutionary age of repetitive element subfamilies and sensitivity of DNA methylation to airborne pollutants. Part Fibre Toxicol 2013; 10:28. [PMID: 23855992 PMCID: PMC3717285 DOI: 10.1186/1743-8977-10-28] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Accepted: 07/05/2013] [Indexed: 02/07/2023] Open
Abstract
Background Repetitive elements take up >40% of the human genome and can change distribution through transposition, thus generating subfamilies. Repetitive element DNA methylation has associated with several diseases and environmental exposures, including exposure to airborne pollutants. No systematic analysis has yet been conducted to examine the effects of exposures across different repetitive element subfamilies. The purpose of the study is to evaluate sensitivity of DNA methylation in differentially‒evolved LINE, Alu, and HERV subfamilies to different types of airborne pollutants. Methods We sampled a total of 120 male participants from three studies (20 high-, 20 low-exposure in each study) of steel workers exposed to metal-rich particulate matter (measured as PM10) (Study 1); gas-station attendants exposed to air benzene (Study 2); and truck drivers exposed to traffic-derived elemental carbon (Study 3). We measured methylation by bisulfite-PCR-pyrosequencing in 10 differentially‒evolved repetitive element subfamilies. Results High-exposure groups exhibited subfamily-specific methylation differences compared to low-exposure groups: L1PA2 showed lower DNA methylation in steel workers (P=0.04) and gas station attendants (P=0.03); L1Ta showed lower DNA methylation in steel workers (P=0.02); AluYb8 showed higher DNA methylation in truck drivers (P=0.05). Within each study, dose–response analyses showed subfamily-specific correlations of methylation with exposure levels. Interaction models showed that the effects of the exposures on DNA methylation were dependent on the subfamily evolutionary age, with stronger effects on older LINEs from PM10 (p‒interaction=0.003) and benzene (p‒interaction=0.04), and on younger Alus from PM10 (p-interaction=0.02). Conclusions The evolutionary age of repetitive element subfamilies determines differential susceptibility of DNA methylation to airborne pollutants.
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Affiliation(s)
- Hyang-Min Byun
- Laboratory of Environmental Epigenetics, Exposure Epidemiology and Risk Program, Harvard School of Public Health, Boston, MA, USA.
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Peluso MEM, Munnia A, Srivatanakul P, Jedpiyawongse A, Sangrajrang S, Ceppi M, Godschalk RWL, van Schooten FJ, Boffetta P. DNA adducts and combinations of multiple lung cancer at-risk alleles in environmentally exposed and smoking subjects. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2013; 54:375-383. [PMID: 23797975 DOI: 10.1002/em.21788] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 04/23/2013] [Accepted: 04/24/2013] [Indexed: 06/02/2023]
Abstract
Interindividual variation in DNA adduct levels in individuals exposed to similar amounts of environmental carcinogens may be due to genetic variability. We analysed the influence of genes involved in determining/modifying DNA damage, including microsomal epoxide hydrolase1 (EPHX1) His139Arg, N-acetyl-transferase, NAD(P)H:quinone oxidoreductase1 (NQO1) Pro187Ser, manganese superoxide dismutase2 (MnSOD2) Val16Ala, and apurinic/apyrimidinic endonuclease1 (APE1) Asp148Glu polymorphisms in blood of 120 smokers. Subsequently, we examined the effects of the combinations of the variant alleles of EPHX, NQO1 and MnSOD2 together with the wild type allele of APE1 on DNA damage by calculating the "sum of at-risk alleles." We reviewed the studies examining the relationships of DNA adducts with at-risk alleles in environmentally exposed subjects. Our findings showed that smokers carrying the EPHX1-139Arg and the NQO1-187Ser variants were significantly more likely to have higher adduct levels. Null associations were found with the other variants. Nevertheless, DNA adduct levels in smokers with ≥5 at-risk alleles were significantly different from those with fewer than two alleles. A similar picture emerged from studies of DNA adducts and at-risk alleles in environmentally exposed and smoking subjects. Certain at-risk allele combinations may confer a greater likelihood of increased levels of adducts after environmental insults. The increase in DNA adduct levels in susceptible subjects exposed to environmental carcinogens may reflect changes in the mechanisms that protect cells from the accumulation of genetic damage. Alterations of the physiological processes designed to maintain homeostasis may reduce the individual "genotoxic tolerance" to environmental challenges and result in phenotypes characterized by high levels of DNA adducts.
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Affiliation(s)
- Marco E M Peluso
- Cancer Risk Factor Branch, Cancer Prevention and Research Institute, Florence, Italy.
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Cortessis VK. Commentary: rapid steps forward in environmental epigenetics: implications for epidemiologic investigation of chronic disease. Int J Epidemiol 2013; 41:1761-3. [PMID: 23283718 DOI: 10.1093/ije/dys211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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Davey Smith G. If data could talk back: Anzia Yezierska, Paul de Kruif and thousands of pages of ‘research’. Int J Epidemiol 2013; 42:1-6. [DOI: 10.1093/ije/dyt039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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