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Potential Health Risks of Chemicals in Car Colorant Products. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16060913. [PMID: 30875733 PMCID: PMC6466371 DOI: 10.3390/ijerph16060913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/18/2019] [Accepted: 03/05/2019] [Indexed: 11/16/2022]
Abstract
Public concern regarding the use of products with chemicals has increased in Korea, following reports indicating that hazardous chemicals in products, such as disinfectants, can cause fatal lung disease. Despite the widespread use of car colorant products, little is known regarding their potential health risks. The purpose of this study was to determine the potential health risks of substances that exist in car colorant products. Thirteen car colorant products were purchased from the Korean market and 15 commonly used chemicals were analyzed. Exposure and risk assessments were conducted in two assessment stages (screening and refined). The analysis showed that all of the examined products contained toluene, ethylbenzene, and xylene. The maximum concentration of toluene was 52.5%, with a median concentration of 10.8%. Tier 1 (screening) assessment showed that four chemicals (toluene, ethylbenzene, xylene, and 2-butoxyethanol) may pose health risks, but tier 2 (refined) assessment showed that these chemicals do not pose any risk. However, these chemicals were present in all of the examined products, and government regulations did not control their concentrations in these products. Therefore, we suggest that levels of toluene, ethylbenzene, and xylene in car colorant products should be regulated to protect public health.
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Wang Z, Xu X, He B, Guo J, Zhao B, Zhang Y, Zhou Z, Zhou X, Zhang R, Abliz Z. The impact of chronic environmental metal and benzene exposure on human urinary metabolome among Chinese children and the elderly population. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 169:232-239. [PMID: 30448706 DOI: 10.1016/j.ecoenv.2018.11.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 11/01/2018] [Accepted: 11/05/2018] [Indexed: 06/09/2023]
Abstract
The health effects of metals and benzene exposure have been extensively investigated; however, information on the impact of chronic environmental metal and benzene exposure on human urinary metabolome is limited. In this study, a total of 566 participants, including 352 elderly and 214 children, were split into the "exposed" and "control" groups. The urine samples of all the participants were collected and stored at - 80 °C until analysis. The urinary levels of 17 metals and S-phenylmercapturic acid (S-PMA) were determined by the ICP-MS and LC-MS/MS methods to comprehensively assess the personal metal and benzene exposure levels, respectively. Then, the individual levels of metal and benzene exposure were correlated to the metabolic consequences of ambient pollutant exposure, which were previously observed in our metabolomics study. As a result, multiple metals, including Cd, Co, Cr, Cu, Fe, Hg, Li, Mo, Ni, Pb, Se, and Zn, exhibited a significant linear dose-dependent association with one or more urinary metabolites, including two amino acids (pyroglutamic acid and 3-methylhistidine), three organic acids (azelaic acid, decenedioic acid, and hydroxytetradecanedioic acid), ten medium-chainacylcarnitines (heptenedioylcarnitine, octenedioylcarnitine, nonenedioylcarnitine, decenedioylglucuronide, 3-hydroxydecanoylcarnitine, dodecanedioylcarnitine, nonanoylcarnitine, decadienylcarnitine, hydroxydodecenoylcarnitine, dodecadienylcarnitine, and dodecenoylcarnitine), and one glucuronide conjugate (decenedioylglucuronide). These observations indicate that the increased environmental metal exposure has caused various oxidative stress-related effects, including the depletion of antioxidants, accelerated muscle proteolysis, elevated activity of UGTs, increased lipid peroxidation, and the disorder of mitochondrial lipid metabolism among exposed children and the elderly. The current study provides new insights into the biological effects induced by metal exposure in the environment.
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Affiliation(s)
- Zhonghua Wang
- Center for Imaging and Systems Biology, College of Life and Environmental Sciences, Minzu University of China, 27 Zhongguancun South Avenue, Beijing 100081, China
| | - Xiaoyu Xu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of MateriaMedica, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Xiannongtan Street, Beijing 100050, China
| | - Bingshu He
- Center for Imaging and Systems Biology, College of Life and Environmental Sciences, Minzu University of China, 27 Zhongguancun South Avenue, Beijing 100081, China
| | - Jinghua Guo
- Analytical and Testing Center, Beijing Normal University, Beijing 100875, China
| | - Baoxin Zhao
- Taiyuan Centre for Disease Control and Prevention, Taiyuan 030012, China
| | - Yanping Zhang
- Taiyuan Centre for Disease Control and Prevention, Taiyuan 030012, China
| | - Zhi Zhou
- Center for Imaging and Systems Biology, College of Life and Environmental Sciences, Minzu University of China, 27 Zhongguancun South Avenue, Beijing 100081, China
| | - Xia Zhou
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of MateriaMedica, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Xiannongtan Street, Beijing 100050, China
| | - Ruiping Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of MateriaMedica, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Xiannongtan Street, Beijing 100050, China.
| | - Zeper Abliz
- Center for Imaging and Systems Biology, College of Life and Environmental Sciences, Minzu University of China, 27 Zhongguancun South Avenue, Beijing 100081, China; State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of MateriaMedica, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Xiannongtan Street, Beijing 100050, China.
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53
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Teras LR, Diver WR, Deubler EL, Krewski D, Flowers CR, Switchenko JM, Gapstur SM. Residential ambient benzene exposure in the United States and subsequent risk of hematologic malignancies. Int J Cancer 2019; 145:2647-2660. [DOI: 10.1002/ijc.32202] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 12/21/2018] [Accepted: 01/11/2019] [Indexed: 12/25/2022]
Affiliation(s)
- Lauren R. Teras
- Epidemiology Research GroupAmerican Cancer Society Atlanta GA
| | - W. Ryan Diver
- Epidemiology Research GroupAmerican Cancer Society Atlanta GA
| | | | - Daniel Krewski
- McLaughlin Centre for Population Health Risk AssessmentUniversity of Ottawa Ottawa ON Canada
- School of Epidemiology, Public Health and Disease PreventionUniversity of Ottawa Ottawa ON Canada
| | - Christopher R. Flowers
- Department of Hematology and Medical OncologyWinship Cancer Institute, Emory University School of Medicine Atlanta GA
| | - Jeffrey M. Switchenko
- Department of Biostatistics and BioinformaticsRollins School of Public Health, Emory University Atlanta GA
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Masekameni MD, Moolla R, Gulumian M, Brouwer D. Risk Assessment of Benzene, Toluene, Ethyl Benzene, and Xylene Concentrations from the Combustion of Coal in a Controlled Laboratory Environment. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 16:E95. [PMID: 30602669 PMCID: PMC6339150 DOI: 10.3390/ijerph16010095] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 12/21/2018] [Accepted: 12/21/2018] [Indexed: 01/15/2023]
Abstract
A D-grade type coal was burned under simulated domestic practices in a controlled laboratory set-up, in order to characterize the emissions of volatile organic compounds (VOCs); namely, benzene, toluene, ethylbenzene, and xylenes (BTEX). Near-field concentrations were collected in a shack-like structure constructed using corrugated iron, simulating a traditional house found in informal settlements in South Africa (SA). Measurements were carried out using the Synspec Spectras GC955 real-time monitor over a three-hour burn cycle. The 3-h average concentrations (in µg/m³) of benzene, toluene, ethylbenzene, p-xylene, and o-xylene were 919 ± 44, 2051 ± 91, 3838 ±19, 4245 ± 41 and 3576 ± 49, respectively. The cancer risk for adult males and females in a typical SA household exposure scenario was found to be 1.1 and 1.2 respectively, which are 110- and 120-fold higher than the U.S. Environmental Protection Agency (EPA) designated risk severity indicator (1 × 10-6). All four TEX (toluene, ethylbenzene, p-xylene and o-xylene) compounds recorded a Hazard Quotient (HQ) of less than 1, indicating a low risk of developing related non-carcinogenic health effects. The HQ for TEX ranged from 0.001 to 0.05, with toluene concentrations being the lowest, and ethylbenzene the highest. This study has demonstrated that domestic coal burning may be a significant source of BTEX emission exposure.
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Affiliation(s)
- Masilu Daniel Masekameni
- Occupational Health Division, School of Public Health, University of the Witwatersrand, Parktown 2193, Johannesburg, South Africa.
- Department of Geography, Environmental Management and Energy Studies, University of Johannesburg, Aukland Park 2006, Johannesburg, South Africa.
| | - Raeesa Moolla
- School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Private Bag X3, WITS 2050, South Africa.
| | - Mary Gulumian
- National Institute for Occupational Health, National Health Laboratory Services, Braamfontein 2001, Johannesburg, South Africa.
- Haematology and Molecular Medicine, School of Pathology, University of the Witwatersrand, Parktown 2193, Johannesburg, South Africa.
| | - Derk Brouwer
- Occupational Health Division, School of Public Health, University of the Witwatersrand, Parktown 2193, Johannesburg, South Africa.
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55
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Chen L, Guo P, Zhang H, Li W, Gao C, Huang Z, Fan J, Zhang Y, Li X, Liu X, Wang F, Wang S, Li Q, He Z, Li H, Chen S, Wu X, Ye L, Li Q, Tang H, Wang Q, Dong G, Xiao Y, Chen W, Li D. Benzene-induced mouse hematotoxicity is regulated by a protein phosphatase 2A complex that stimulates transcription of cytochrome P4502E1. J Biol Chem 2018; 294:2486-2499. [PMID: 30567741 DOI: 10.1074/jbc.ra118.006319] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/14/2018] [Indexed: 12/21/2022] Open
Abstract
Chronic benzene exposure is associated with hematotoxicity and the development of aplastic anemia and leukemia. However, the signaling pathways underlying benzene-induced hematotoxicity remain to be defined. Here, we investigated the role of protein phosphatase 2A (PP2A) in the regulation of benzene-induced hematotoxicity in a murine model. Male mice with a hepatocyte-specific homozygous deletion of the Ppp2r1a gene (encoding PP2A Aα subunit) (HO) and matched wildtype (WT) mice were exposed to benzene via inhalation at doses of 1, 10, and 100 ppm for 28 days. Peripheral white blood cell counts and activation of bone marrow progenitors were attenuated in the HO mice, indicating that Ppp2r1a deletion protects against benzene-induced hematotoxicity. Moreover, elevation of urinary S-phenyl mercapturic acid, a benzene metabolite, was much greater in WT mice than in HO mice. Real-time exhalation analysis revealed more exhaled benzene but fewer benzene metabolites in HO mice than in WT mice, possibly because of the down-regulation of Cyp2e1, encoding cytochrome P4502E1, in hepatocytes of the HO mice. Loss-of-function screening disclosed that PP2A complexes containing the B56α subunit participate in regulating Cyp2e1 expression. Notably, PP2A-B56α suppression in HepG2 cells resulted in persistent β-catenin phosphorylation at Ser33-Ser37-Thr41 in response to CYP2E1 agonists. In parallel, nuclear translocation of β-catenin was inhibited, concomitant with a remarkable decrease of Cyp2e1 expression. These findings support the notion that a regulatory cascade comprising PP2A-B56α, β-catenin, and Cyp2e1 is involved in benzene-induced hematotoxicity, providing critical insight into the role of PP2A in responses to the environmental chemicals.
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Affiliation(s)
- Liping Chen
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Ping Guo
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Haiyan Zhang
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Wenxue Li
- the Department of Toxicology, Guangzhou Center for Disease Control and Prevention, Guangzhou 510440
| | - Chen Gao
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Zhenlie Huang
- the Food Safety and Health Research Center, School of Public Health, Southern Medical University, Guangzhou 510515
| | - Junling Fan
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Yuling Zhang
- the Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou 510632, and
| | - Xue Li
- the Institute of Mass Spectrometer and Atmospheric Environment, Jinan University, Guangzhou 510632, and
| | - Xiaoling Liu
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Fangping Wang
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Shan Wang
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Qingye Li
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Zhini He
- the Food Safety and Health Research Center, School of Public Health, Southern Medical University, Guangzhou 510515
| | - Huiyao Li
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Shen Chen
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Xiaonen Wu
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Lizhu Ye
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Qiong Li
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Huanwen Tang
- the Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China
| | - Qing Wang
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Guanghui Dong
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Yongmei Xiao
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Wen Chen
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080
| | - Daochuan Li
- From the Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou 510080,
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Slack J, Nguyen L, Naugler C, Rashid-Kolvear F. Incidence of Myelodysplastic Syndromes in a Major Canadian Metropolitan Area. J Appl Lab Med 2018; 3:378-383. [PMID: 33636921 DOI: 10.1373/jalm.2018.026500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 05/14/2018] [Indexed: 11/06/2022]
Abstract
BACKGROUND Myelodysplastic syndromes (MDS) are a heterogeneous group of clonal stem cell disorders that can progress to acute myeloid leukemia. In many regions of the world, the epidemiology of MDS is poorly described. This study determines the crude incidence of MDS in Calgary, Alberta, Canada, with new cases diagnosed using the revised 2008 WHO criteria. METHODS For the study period of January 1, 2011 to December 31, 2015, incident cases of MDS were identified from a centralized database maintained by Calgary Laboratory Services' Cancer Cytogenetics Laboratory, which receives and analyzes patient bone marrow samples from southern Alberta. RESULTS The Calgary metropolitan area had a total incidence rate of 2.60 MDS cases per 100000 person years, corresponding to an age-standardized incidence of 3.69 for Canada. The male-to-female sex ratio was 1.35, and the median age at diagnosis was 75 years. With these results, 1295 new annual cases of MDS were predicted in Canada. CONCLUSIONS The reported incidence rate, sex, and age distribution were consistent with data around the world including several developing nations. This is the first study to provide information regarding the epidemiology of MDS within Canada.
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Affiliation(s)
- Jonathan Slack
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.,Calgary Laboratory Services, Calgary, AB, Canada
| | - Leonard Nguyen
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Christopher Naugler
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.,Calgary Laboratory Services, Calgary, AB, Canada.,Departments of Family Medicine and Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Fariborz Rashid-Kolvear
- Department of Pathology and Laboratory Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.,Calgary Laboratory Services, Calgary, AB, Canada
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The effects of Nrf2 knockout on regulation of benzene-induced mouse hematotoxicity. Toxicol Appl Pharmacol 2018; 358:56-67. [DOI: 10.1016/j.taap.2018.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 09/02/2018] [Accepted: 09/04/2018] [Indexed: 01/29/2023]
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Sun R, Xu K, Zhang Q, Jiang X, Man Z, Yin L, Zhang J, Pu Y. Plasma metabonomics investigation reveals involvement of fatty acid oxidation in hematotoxicity in Chinese benzene-exposed workers with low white blood cell count. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:32506-32514. [PMID: 30238259 DOI: 10.1007/s11356-018-3160-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Accepted: 09/06/2018] [Indexed: 06/08/2023]
Abstract
Benzene is an environmental and occupational contaminant. Health hazards associated with occupational benzene exposure is a major public health problem in China. In this study, we analyzed metabolite profiles among plasma samples collected from benzene-exposed workers with low white blood cell count (BLWs) and healthy controls using high-performance liquid chromatography-time-of-flight mass spectrometry. To screen potential benzene hematotoxicity biomarkers and metabolic pathways, principal component analysis was used to examine metabolite profile changes in plasma samples. The alterations in fatty acid oxidation (FAO) pathway were consistent with our previous findings in a mouse model; hence, two key genes were selected and verified in WBC samples. A total of nine identified metabolites were significantly changed in BLWs, which were involved in glutathione metabolism, porphyrin metabolism, lipid metabolism pathway, and FAO metabolism. Furthermore, compared with healthy controls, the mRNA expressions of carnitine acyltransferase (CRAT) and ACADVL were significantly increased in BLWs. Particularly, WBC counts was negatively correlated with the expression of AVADVL in BLWs. These aberrant metabolites could act as potential biomarkers for benzene hematotoxicity. In addition, fatty acid oxidation pathway may play a critical role in the development of hematotoxicity caused by benzene.
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Affiliation(s)
- Rongli Sun
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Kai Xu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Qiaoyun Zhang
- Jiangsu Province Center for Disease Prevention and Control, Nanjing, 210009, Jiangsu, China
| | - Xiaoyun Jiang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Zhaodi Man
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Lihong Yin
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Juan Zhang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, Jiangsu, China.
| | - Yuepu Pu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, Jiangsu, China.
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Talibov M, Sormunen J, Hansen J, Kjaerheim K, Martinsen JI, Sparen P, Tryggvadottir L, Weiderpass E, Pukkala E. Benzene exposure at workplace and risk of colorectal cancer in four Nordic countries. Cancer Epidemiol 2018; 55:156-161. [PMID: 29980027 DOI: 10.1016/j.canep.2018.06.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 06/22/2018] [Accepted: 06/26/2018] [Indexed: 11/29/2022]
Abstract
OBJECTIVE The aim of this case-control study was to assess the effect of occupational benzene exposure on the risk of colorectal cancer, including its subtypes. METHODS The study included 181,709 colon cancer and 109,227 rectal cancer cases diagnosed between 1961 and 2005 in Finland, Iceland, Norway and Sweden. Cases were identified from the Nordic Occupational Cancer Study (NOCCA) cohort. Five controls per case were selected from the same cohort, matched for country, birth year, and sex. Occupational benzene exposure for each study participant was estimated by linking their job titles to country specific job-exposure matrices. Odds ratios (OR) and 95% confidence intervals (CI) were calculated by using conditional logistic regression models. The results were adjusted for physical strain at work, formaldehyde, ionizing radiation and wood dust. RESULTS Increased risk was observed for all colorectal cancer (OR = 1.12, 95% CI 1.05-1.18) for the high decile of cumulative benzene exposure, indicating a statistically significant dose-response relationship. This excess risk was mainly seen in ascending colon (OR = 1.27, 95% CI 1.13-1.43), and transversal colon (OR = 1.21, 95% CI 1.01-1.41). The ORs in the highest exposure category were markedly higher in women than in men in all subsites of colon and rectum. CONCLUSION This study showed an association between workplace benzene exposure and colorectal cancer. The risk was restricted to ascending and transversal colon, and was the strongest among women.
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Affiliation(s)
- Madar Talibov
- Faculty of Social/Health Sciences, University of Tampere, Tampere, Finland; International Agency for Research on Cancer, Environment and Radiation Section, Lyon, France.
| | - Jorma Sormunen
- Faculty of Social/Health Sciences, University of Tampere, Tampere, Finland; Tampere University Hospital, Department of Oncology, Tampere, Finland.
| | - Johnni Hansen
- The Danish Cancer Society Research Center, Copenhagen, Denmark.
| | | | | | - Per Sparen
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
| | - Laufey Tryggvadottir
- Icelandic Cancer Registry, Reykjavik, Iceland; Faculty of Medicine, University of Iceland, Reykjavik, Iceland.
| | - Elisabete Weiderpass
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden; Department of Community Medicine, Faculty of Health Sciences, University of Tromsø, The Arctic University of Norway, Tromsø, Norway; Department of Research, Cancer Registry of Norway, Institute of Population-Based Cancer Research, Oslo, Norway; Genetic Epidemiology Group, Folkhälsan Research Center, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
| | - Eero Pukkala
- Faculty of Social/Health Sciences, University of Tampere, Tampere, Finland; Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer Research, Helsinki, Finland.
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Yoon JH, Kwak WS, Ahn YS. A brief review of relationship between occupational benzene exposure and hematopoietic cancer. Ann Occup Environ Med 2018; 30:33. [PMID: 29760933 PMCID: PMC5946455 DOI: 10.1186/s40557-018-0245-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 04/30/2018] [Indexed: 11/25/2022] Open
Abstract
We reviewed articles to clarify the current evidence status for 1) types of cancer which related to benzene exposure, and 2) certain benzene exposure level which might cause the hematopoietic cancers. Hematopoietic function of the bone marrow is involved in the production of all blood cells types. The benzene metabolites including benzoquinone and mucoaldehyde affect hematopoietic stem cells as well as differentiation steps of progenitor cells for each blood cell. Hence, we concluded that benzene was associated with all lymphohematic carcinogenesis. First, it is supported by biological plausibility. Second, it is supported by meta-analysis although sing study did not show relationship due to lack of sample size or statistical power. More recent studies show lesser exposed level related to risk of cancer, compare to past studies did. Actually, early studies show the risk of malignancies in workers who exposed more than 200 ppm-years. However, only 0.5 to 1 ppm-year benzene exposed show significant linking to risk of malignancies in recent study. As reviewed research articles, we concluded that the relatively lower exposure level, such as 0.5–1 ppm-year, will be considering at risk of hematopoietic cancer. However, more research needs to be done on dose-response analysis.
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Affiliation(s)
- Jin-Ha Yoon
- 1Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea.,2The Institute for Occupational Health, Yonsei University College of Medicine, Seoul, Korea
| | - Woo Seok Kwak
- 2The Institute for Occupational Health, Yonsei University College of Medicine, Seoul, Korea
| | - Yeon-Soon Ahn
- 3Department of Preventive Medicine, Institute of Occupational and Environmental Medicine, Yonsei University Wonju College of Medicine, 162, Ilsan-dong, Wonju, South Korea, Wonju, 26426 Korea
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Li W, Schnatter AR. Benzene risk assessment: does new evidence on myelodysplastic syndrome justify a new approach? Crit Rev Toxicol 2018; 48:417-432. [DOI: 10.1080/10408444.2018.1437389] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Wenchao Li
- Occupational and Public Health Division, ExxonMobil Biomedical Sciences Inc., Annandale, NJ, USA
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI, USA
| | - A. Robert Schnatter
- Occupational and Public Health Division, ExxonMobil Biomedical Sciences Inc., Annandale, NJ, USA
- EpiSolutions, LLC, Easton, PA, USA
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Abstract
OBJECTIVE Due to the sparse data on benzene exposure and myelodysplastic syndrome (MDS) subtypes, we studied this relationship in patients from 29 hospitals in Shanghai, China. METHODS We recruited 604 cases of MDS and 1193 controls matched on age, sex, and admission date. We interviewed subjects for information on workplace and lifestyle exposures, and developed semi-quantitative exposure estimates. RESULTS Benzene exposure showed a direct exposure-response pattern with refractory cytopenia with multilineage dysplasia, a less certain association with refractory cytopenia with unilineage dysplasia, and no association with other MDS subtypes. A different pattern was observed with farm residence and smoking, which was primarily related to refractory anemias. CONCLUSIONS This research demonstrates the importance of MDS subtype specification for more robust etiologic insights. Our data suggests that subtypes with non-erythroid dysplasia are associated with benzene exposure.
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Gross SA, Paustenbach DJ. Shanghai Health Study (2001-2009): What was learned about benzene health effects? Crit Rev Toxicol 2017; 48:217-251. [PMID: 29243948 DOI: 10.1080/10408444.2017.1401581] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The Shanghai Health Study (SHS) was a large epidemiology study conducted as a joint effort between the University of Colorado and Fudan University in Shanghai, China. The study was funded by members of the American Petroleum Institute between 2001 and 2009 and was designed to evaluate the human health effects associated with benzene exposure. Two arms of the SHS included: an occupational-based molecular epidemiology study and several hospital-based case control studies. Consistent with historical literature, following sufficient exposure to relatively high airborne concentrations and years of exposure, the SHS concluded that exposure to benzene resulted in an increased risk of various blood and bone marrow abnormalities such as benzene poisoning, aplastic anemia (AA), myelodysplastic syndrome (MDS), and acute myeloid leukemia (AML). Non-Hodgkin lymphoma (NHL) was not significantly increased for the exposures examined in this study. Perhaps the most important contribution of the SHS was furthering our understanding of the mechanism of benzene-induced bone marrow toxicity and the importance of identifying the proper subset of MDS relevant to benzene. Investigators found that benzene-exposed workers exhibited bone marrow morphology consistent with an immune-mediated inflammatory response. Contrary to historic reports, no consistent pattern of cytogenetic abnormalities was identified in these workers. Taken together, findings from SHS provided evidence that the mechanism for benzene-induced bone marrow damage was not initiated by chromosome abnormalities. Instead, chronic inflammation, followed by an immune-mediated response, is likely to play a more significant role in benzene-induced disease initiation and progression than previously thought.
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64
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Loomis D, Guyton KZ, Grosse Y, El Ghissassi F, Bouvard V, Benbrahim-Tallaa L, Guha N, Vilahur N, Mattock H, Straif K. Carcinogenicity of benzene. Lancet Oncol 2017; 18:1574-1575. [PMID: 29107678 DOI: 10.1016/s1470-2045(17)30832-x] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Dana Loomis
- International Agency for Research on Cancer, Lyon, France
| | | | - Yann Grosse
- International Agency for Research on Cancer, Lyon, France
| | | | | | | | - Neela Guha
- International Agency for Research on Cancer, Lyon, France
| | - Nadia Vilahur
- International Agency for Research on Cancer, Lyon, France
| | - Heidi Mattock
- International Agency for Research on Cancer, Lyon, France
| | - Kurt Straif
- International Agency for Research on Cancer, Lyon, France
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Ramirez MI, Arevalo AP, Sotomayor S, Bailon-Moscoso N. Contamination by oil crude extraction - Refinement and their effects on human health. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 231:415-425. [PMID: 28826075 DOI: 10.1016/j.envpol.2017.08.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 08/01/2017] [Accepted: 08/02/2017] [Indexed: 06/07/2023]
Abstract
The harmful effects of oil on various species of flora and fauna have been studied extensively; however, few studies have studied the effects of oil exposure on human health. The objective of this research was to collect information on the acute health effects and serious psychological symptoms of the possible consequences of such exposure to crude oil. Some studies focused on the composition of different chemicals used in the extraction process, and wastes generated proved to be highly harmful to human health. Thus, studies have shown that individuals who live near oil fields or wells - or who take part in activities of cleaning oil spills - have presented health conditions, such as irritation to the skin, eyes, mucous membranes, kidney damage, liver, reproductive, among others. In Ecuador, this reality is not different from other countries, and some studies have shown increased diseases related with oil crude and oil spills, like skin irritation, throat, liver, lung, infertility, and abortions, and it has been linked to childhood leukemia. Other studies suggest a direct relationship between DNA damage because of oil resulting in a genetic instability of the main enzymes of cellular metabolism as well as a relationship with some cancers, such as leukemia.
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Affiliation(s)
- Maria Isabel Ramirez
- Departamento de Ciencias de La Salud, Universidad Técnica Particular de Loja, San Cayetano Alto, Loja, 11-01-608, Ecuador.
| | - Ana Paulina Arevalo
- Departamento de Ciencias de La Salud, Universidad Técnica Particular de Loja, San Cayetano Alto, Loja, 11-01-608, Ecuador.
| | - Santiago Sotomayor
- Departamento de Ciencias de La Salud, Universidad Técnica Particular de Loja, San Cayetano Alto, Loja, 11-01-608, Ecuador.
| | - Natalia Bailon-Moscoso
- Departamento de Ciencias de La Salud, Universidad Técnica Particular de Loja, San Cayetano Alto, Loja, 11-01-608, Ecuador.
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66
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Mundt KA, Gentry PR, Dell LD, Rodricks JV, Boffetta P. Six years after the NRC review of EPA's Draft IRIS Toxicological Review of Formaldehyde: Regulatory implications of new science in evaluating formaldehyde leukemogenicity. Regul Toxicol Pharmacol 2017; 92:472-490. [PMID: 29158043 DOI: 10.1016/j.yrtph.2017.11.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 10/27/2017] [Accepted: 11/15/2017] [Indexed: 11/28/2022]
Abstract
Shortly after the International Agency for Research on Cancer (IARC) determined that formaldehyde causes leukemia, the United States Environmental Protection Agency (EPA) released its Draft IRIS Toxicological Review of Formaldehyde ("Draft IRIS Assessment"), also concluding that formaldehyde causes leukemia. Peer review of the Draft IRIS Assessment by a National Academy of Science committee noted that "causal determinations are not supported by the narrative provided in the draft" (NRC 2011). They offered recommendations for improving the Draft IRIS assessment and identified several important research gaps. Over the six years since the NRC peer review, significant new science has been published. We identify and summarize key recommendations made by NRC and map them to this new science, including extended analysis of epidemiological studies, updates of earlier occupational cohort studies, toxicological experiments using a sensitive mouse strain, mechanistic studies examining the role of exogenous versus endogenous formaldehyde in bone marrow, and several critical reviews. With few exceptions, new findings are consistently negative, and integration of all available evidence challenges the earlier conclusions that formaldehyde causes leukemia. Given formaldehyde's commercial importance, environmental ubiquity and endogenous production, accurate hazard classification and risk evaluation of whether exposure to formaldehyde from occupational, residential and consumer products causes leukemia are critical.
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Affiliation(s)
- Kenneth A Mundt
- Environment and Health, Ramboll Environ, Amherst MA, United States.
| | - P Robinan Gentry
- Environment and Health, Ramboll Environ, Amherst MA, United States
| | - Linda D Dell
- Environment and Health, Ramboll Environ, Amherst MA, United States
| | | | - Paolo Boffetta
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Jiménez-Garza O, Guo L, Byun HM, Carrieri M, Bartolucci GB, Zhong J, Baccarelli AA. Promoter methylation status in genes related with inflammation, nitrosative stress and xenobiotic metabolism in low-level benzene exposure: Searching for biomarkers of oncogenesis. Food Chem Toxicol 2017; 109:669-676. [DOI: 10.1016/j.fct.2017.08.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 08/15/2017] [Indexed: 12/13/2022]
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Kerzic PJ, Irons RD. Distribution of chromosome breakpoints in benzene-exposed and unexposed AML patients. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 55:212-216. [PMID: 28926803 DOI: 10.1016/j.etap.2017.08.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 08/30/2017] [Indexed: 06/07/2023]
Abstract
Results of laboratory studies and investigations of occupationally exposed healthy individuals have been used to develop a mode of action for benzene-induced leukemia that mirrors disease following treatment with chemotherapeutic agents. Recently we have described series of AML and MDS cases with benzene exposure history, and have provided cytogenetic, molecular, and pathologic evidence that these cases differ significantly in many features from therapy-related disease. Here we have extended this work, and describe chromosome breakpoints across 441 identifiable regions, in terms of gains or losses, in 710 AML cases collected during the Shanghai Health Study, which include 75 with a history of benzene exposure. Using FISH and cytogenetic analysis, we developed prevalence information and risk ratios for benzene exposure across all regions with a lesion in at least one exposed and unexposed case. These results indicate that AML following benzene exposure mirrors de novo disease, and supports a mechanism for development of hematopoietic disease that bears no resemblance to therapy-related disease.
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Affiliation(s)
- Patrick J Kerzic
- California Environmental Protection Agency, 9211 Oakdale Ave, Chatsworth, CA, 91311, USA.
| | - Richard D Irons
- Department of Hematology, Huashan Hospital, Fudan University, Shanghai, China; Anschutz Medical Center, University of Colorado, Aurora, CO, USA
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69
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Almerud P, Akerstrom M, Andersson EM, Strandberg B, Sallsten G. Low personal exposure to benzene and 1,3-butadiene in the Swedish petroleum refinery industry. Int Arch Occup Environ Health 2017; 90:713-724. [PMID: 28578463 PMCID: PMC5583277 DOI: 10.1007/s00420-017-1234-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 05/24/2017] [Indexed: 11/29/2022]
Abstract
PURPOSE Petroleum refinery workers are exposed to the carcinogens benzene and 1,3-butadiene. Declining exposures have been reported internationally but information on current exposure in the Swedish refinery industry is limited. The aim was to examine refinery workers' personal exposure to benzene and 1,3-butadiene and increase awareness of exposure conditions by collaboration with involved refineries. METHODS Altogether 505 repeated personal exposure measurements were performed among workers at two refineries. Full-shift measurements were conducted in different exposure groups using Perkin Elmer diffusive samplers filled with Carbopack X. Mean levels were calculated using mixed-effects models. A large fraction of measurements below the limit of detection (LOD) required imputation of computer-generated data. RESULTS Mean benzene exposure among process technicians was 15.3 µg/m3 (95% CI 10.4-22.5 µg/m3) and 13.7 µg/m3 (95% CI 8.3-22.7 µg/m3) for Refinery 1 and 2, respectively. Process technicians working outdoors had higher exposure than maintenance workers (20.7 versus 5.9 µg/m3, p < 0.01). Working in the harbour and tank park (Refinery 1), compared with the process area, was associated with higher exposure. The 1,3-butadiene exposure was low, 5.4 and 1.8 µg/m3, respectively. The total variation was generally attributed to within-worker variability. CONCLUSIONS Low benzene and 1,3-butadiene levels were found among refinery workers. Mean benzene exposure was about 1% of the Swedish occupational limit (1500 µg/m3) and for 1,3-butadiene, exposure was even lower. A large fraction of values below the LOD can be managed by carefully modelled, computer-generated data.
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Affiliation(s)
- Pernilla Almerud
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, PO Box 414, 405 30, Gothenburg, Sweden.
| | - M Akerstrom
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, PO Box 414, 405 30, Gothenburg, Sweden
| | - E M Andersson
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, PO Box 414, 405 30, Gothenburg, Sweden
| | - B Strandberg
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, PO Box 414, 405 30, Gothenburg, Sweden
| | - G Sallsten
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, PO Box 414, 405 30, Gothenburg, Sweden
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Abplanalp W, DeJarnett N, Riggs DW, Conklin DJ, McCracken JP, Srivastava S, Xie Z, Rai S, Bhatnagar A, O’Toole TE. Benzene exposure is associated with cardiovascular disease risk. PLoS One 2017; 12:e0183602. [PMID: 28886060 PMCID: PMC5590846 DOI: 10.1371/journal.pone.0183602] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 08/02/2017] [Indexed: 12/22/2022] Open
Abstract
Benzene is a ubiquitous, volatile pollutant present at high concentrations in toxins (e.g. tobacco smoke) known to increase cardiovascular disease (CVD) risk. Despite its prevalence, the cardiovascular effects of benzene have rarely been studied. Hence, we examined whether exposure to benzene is associated with increased CVD risk. The effects of benzene exposure in mice were assessed by direct inhalation, while the effects of benzene exposure in humans was assessed in 210 individuals with mild to high CVD risk by measuring urinary levels of the benzene metabolite trans,trans-muconic acid (t,t-MA). Generalized linear models were used to assess the association between benzene exposure and CVD risk. Mice inhaling volatile benzene had significantly reduced levels of circulating angiogenic cells (Flk-1+/Sca-1+) as well as an increased levels of plasma low-density lipoprotein (LDL) compared with control mice breathing filtered air. In the human cohort, urinary levels of t,t-MA were inversely associated several populations of circulating angiogenic cells (CD31+/34+/45+, CD31+/34+/45+/AC133–, CD34+/45+/AC133+). Although t,t-MA was not associated with plasma markers of inflammation or thrombosis, t,t-MA levels were higher in smokers and in individuals with dyslipidemia. In smokers, t,t-MA levels were positively associated with urinary metabolites of nicotine (cotinine) and acrolein (3-hydroxymercapturic acid). Levels of t,t-MA were also associated with CVD risk as assessed using the Framingham Risk Score and this association was independent of smoking. Thus, benzene exposure is associated with increased CVD risk and deficits in circulating angiogenic cells in both smokers and non-smokers.
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Affiliation(s)
- Wesley Abplanalp
- Diabetes and Obesity Center, University of Louisville, Louisville, Kentucky, United States of America
- Institute of Molecular Cardiology, University of Louisville, Louisville, Kentucky, United States of America
| | - Natasha DeJarnett
- Diabetes and Obesity Center, University of Louisville, Louisville, Kentucky, United States of America
- Department of Environmental and Occupational Health Sciences, University of Louisville, Louisville, Kentucky, United States of America
| | - Daniel W. Riggs
- Diabetes and Obesity Center, University of Louisville, Louisville, Kentucky, United States of America
- Institute of Molecular Cardiology, University of Louisville, Louisville, Kentucky, United States of America
| | - Daniel J. Conklin
- Diabetes and Obesity Center, University of Louisville, Louisville, Kentucky, United States of America
- Institute of Molecular Cardiology, University of Louisville, Louisville, Kentucky, United States of America
| | - James P. McCracken
- Diabetes and Obesity Center, University of Louisville, Louisville, Kentucky, United States of America
- Institute of Molecular Cardiology, University of Louisville, Louisville, Kentucky, United States of America
| | - Sanjay Srivastava
- Diabetes and Obesity Center, University of Louisville, Louisville, Kentucky, United States of America
- Institute of Molecular Cardiology, University of Louisville, Louisville, Kentucky, United States of America
| | - Zhengzhi Xie
- Diabetes and Obesity Center, University of Louisville, Louisville, Kentucky, United States of America
- Institute of Molecular Cardiology, University of Louisville, Louisville, Kentucky, United States of America
| | - Shesh Rai
- Department of Bioinformatics and Biostatics, University of Louisville, Louisville, Kentucky, United States of America
- Biostatistics Shared Facility, JG Brown Cancer Center, University of Louisville, Louisville, Kentucky, United States of America
| | - Aruni Bhatnagar
- Diabetes and Obesity Center, University of Louisville, Louisville, Kentucky, United States of America
- Institute of Molecular Cardiology, University of Louisville, Louisville, Kentucky, United States of America
| | - Timothy E. O’Toole
- Diabetes and Obesity Center, University of Louisville, Louisville, Kentucky, United States of America
- Institute of Molecular Cardiology, University of Louisville, Louisville, Kentucky, United States of America
- * E-mail:
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71
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Ugai T, Matsuo K, Sawada N, Iwasaki M, Yamaji T, Shimazu T, Sasazuki S, Inoue M, Kanda Y, Tsugane S. Smoking and alcohol and subsequent risk of myelodysplastic syndromes in Japan: the Japan Public Health Centre-based Prospective Study. Br J Haematol 2017; 178:747-755. [DOI: 10.1111/bjh.14749] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 10/25/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Tomotaka Ugai
- Division of Molecular and Clinical Epidemiology; Aichi Cancer Centre Research Institute; Nagoya Japan
- Division of Haematology; Saitama Medical Centre; Jichi Medical University; Saitama Japan
| | - Keitaro Matsuo
- Division of Molecular and Clinical Epidemiology; Aichi Cancer Centre Research Institute; Nagoya Japan
- Department of Epidemiology; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - Norie Sawada
- Epidemiology and Prevention Group; Centre for Public Health Sciences; National Cancer Centre; Tokyo Japan
| | - Motoki Iwasaki
- Epidemiology and Prevention Group; Centre for Public Health Sciences; National Cancer Centre; Tokyo Japan
| | - Taiki Yamaji
- Epidemiology and Prevention Group; Centre for Public Health Sciences; National Cancer Centre; Tokyo Japan
| | - Taichi Shimazu
- Epidemiology and Prevention Group; Centre for Public Health Sciences; National Cancer Centre; Tokyo Japan
| | - Shizuka Sasazuki
- Epidemiology and Prevention Group; Centre for Public Health Sciences; National Cancer Centre; Tokyo Japan
| | - Manami Inoue
- Epidemiology and Prevention Group; Centre for Public Health Sciences; National Cancer Centre; Tokyo Japan
- Graduate School of Medicine; The University of Tokyo; Tokyo Japan
| | - Yoshinobu Kanda
- Division of Haematology; Saitama Medical Centre; Jichi Medical University; Saitama Japan
| | - Shoichiro Tsugane
- Epidemiology and Prevention Group; Centre for Public Health Sciences; National Cancer Centre; Tokyo Japan
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Ren N, Atyah M, Chen WY, Zhou CH. The various aspects of genetic and epigenetic toxicology: testing methods and clinical applications. J Transl Med 2017; 15:110. [PMID: 28532423 PMCID: PMC5440915 DOI: 10.1186/s12967-017-1218-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 05/18/2017] [Indexed: 12/15/2022] Open
Abstract
Genotoxicity refers to the ability of harmful substances to damage genetic information in cells. Being exposed to chemical and biological agents can result in genomic instabilities and/or epigenetic alterations, which translate into a variety of diseases, cancer included. This concise review discusses, from both a genetic and epigenetic point of view, the current detection methods of different agents’ genotoxicity, along with their basic and clinical relation to human cancer, chemotherapy, germ cells and stem cells.
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Affiliation(s)
- Ning Ren
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, 200032, People's Republic of China. .,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, 200032, People's Republic of China.
| | - Manar Atyah
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, 200032, People's Republic of China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, 200032, People's Republic of China
| | - Wan-Yong Chen
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, 200032, People's Republic of China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, 200032, People's Republic of China
| | - Chen-Hao Zhou
- Liver Cancer Institute and Zhongshan Hospital, Fudan University, Shanghai, 200032, People's Republic of China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Shanghai, 200032, People's Republic of China
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73
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Bree K, Barnhill S, Rundell W. The Dangers of Electrosurgical Smoke to Operating Room Personnel: A Review. Workplace Health Saf 2017; 65:517-526. [PMID: 28414627 DOI: 10.1177/2165079917691063] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A 2007 study in the United Kingdom showed that three of 98 surgeons surveyed admitted using dedicated smoke extractors; 72% of respondents believed inadequate precautions were in place to protect staff from the potential dangers of electrosurgical smoke. Surgical smoke contains harmful chemicals (e.g., hydrogen cyanide, acetylene, and butadiene) that can circumvent standard masks used in the operating room (OR). In addition, bacteria and viruses can be transmitted through this smoke. The topic of electrosurgical smoke is important to occupational health nurses not only because of their responsibility to protect workers, but also because they, like other health care providers, may be exposed to smoke routinely. The authors of this review recommend the regular use of smoke evacuation in ORs and avoidance of electrosurgery whenever possible to protect OR personnel from the potential long-term harmful effects of electrosurgical smoke.
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74
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Ramasahayam S, Jaligama S, Atwa SM, Salley JT, Thongdy M, Blaylock BL, Meyer SA. Megakaryocyte expansion and macrophage infiltration in bone marrow of rats subchronically treated with MNX, N-nitroso environmental degradation product of munitions compound RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine). J Appl Toxicol 2017; 37:913-921. [PMID: 28138994 DOI: 10.1002/jat.3439] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 12/18/2016] [Accepted: 12/19/2016] [Indexed: 01/24/2023]
Abstract
Hexahydro-1-nitroso-3,5-dinitro-1,3,5-triazine (MNX), environmental degradation product of munitions hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), causes seizures in rats with acute oral exposure like parent RDX. Our previous studies have additionally reported hematotoxicity with acute MNX exposure manifested as myelosuppression, anemia and splenic hemosiderosis. This study explored whether MNX administered subchronically continued to target bone marrow to elicit peripheral blood cytopenia. Female Sprague-Dawley rats were gavaged daily for 4 or 6 weeks with 47 mg kg-1 day-1 MNX (¼ LD50 ) or vehicle (5% dimethyl sulfoxide in corn oil) and hematological and clinical chemistry parameters, spleen weights, spleen and bone marrow histopathology and immunohistochemistry with ED1 anti-CD68 macrophage marker were evaluated 24 h after the last dose. Unexpectedly, no decrease in blood erythroid parameters was seen with subchronic MNX and convulsions and tremors ceased after 2 weeks of treatment. Toxicological effects observed were MNX-induced increases in blood granulocyte and platelet counts and in bone marrow megakaryocyte and ED1+ -macrophage density. MNX was without effect on bone marrow cellularity and picrosirius red stained/collagen fiber deposition. Spleen weight increased modestly with extramedullary hematopoiesis evident, but hemosiderin and relative red and white pulp areas were unaffected. Collectively, this study demonstrated that erythroid effects characteristic of acute MNX exposure were not evident with subchronic exposure. However, megakaryocyte proliferation in bone marrow coincident with thrombocytosis after subchronic MNX exposure suggested continued hematotoxicity, but with a qualitatively different outcome. Granulocytosis and increased bone marrow macrophages implicated an inflammatory component in MNX hematotoxicity. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- Sindhura Ramasahayam
- Department of Toxicology, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Sridhar Jaligama
- Department of Toxicology, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Sahar M Atwa
- Department of Toxicology, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Joshua T Salley
- Department of Toxicology, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Marissa Thongdy
- Department of Toxicology, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Benny L Blaylock
- Department of Toxicology, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
| | - Sharon A Meyer
- Department of Toxicology, School of Pharmacy, University of Louisiana at Monroe, Monroe, LA, USA
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75
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Chen Y, Sun P, Guo X, Gao A. MiR-34a, a promising novel biomarker for benzene toxicity, is involved in cell apoptosis triggered by 1,4-benzoquinone through targeting Bcl-2. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 221:256-265. [PMID: 27939626 DOI: 10.1016/j.envpol.2016.11.072] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 11/23/2016] [Accepted: 11/25/2016] [Indexed: 06/06/2023]
Abstract
Exposure to benzene is inevitable, and concerns regarding the adverse health effects of benzene have been raised. Most investigators found that benzene exposure induced hematotoxicity. In this regard, Our study aimed to explore a novel potential biomarker of adverse health effects following benzene exposure and the toxic mechanisms of benzene metabolites in vitro. This study consisted of 314 benzene-exposed workers and 288 control workers, an air benzene concentration of who were 2.64 ± 1.60 mg/m3 and 0.05 ± 0.01 mg/m3, respectively. In this population-based study, miR-34a expression was elevated in benzene-exposed workers. The correlation of miR-34a with the airborne benzene concentration, S-phenylmercapturic acid (S-PMA) and trans, trans-muconic acid (t, t-MA), all of which reflect benzene exposure, was found. Correlation analysis indicated that miR-34a was associated with peripheral blood count, alanine transaminase (ALT) and oxidative stress. Furthermore, multivariate analysis demonstrated that miR-34a expression was strongly associated with white blood cell count (structure loadings = 0.952). In population-based study, miR-34a had the largest contribution to altered peripheral blood counts, which reflect benzene-induced hematotoxicity. The role of miR-34a in benzene toxicity was assessed using lentiviral vector transfection. Results revealed that 1,4-benzoquinone induced abnormal cell apoptosis and simultaneously upregulated miR-34a accompanied with decreased Bcl-2. Finally, inhibition of miR-34a elevated Bcl-2 and decreased 1,4-benzoquinone-induced apoptosis. In conclusion, miR-34a was observed to be involved in benzene-induced hematotoxicity by targeting Bcl-2 and could be regarded as a potential novel biomarker for benzene toxicity.
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Affiliation(s)
- Yujiao Chen
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Pengling Sun
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Xiaoli Guo
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Ai Gao
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China.
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76
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Li J, Zhang X, He Z, Sun Q, Qin F, Huang Z, Zhang X, Sun X, Liu L, Chen L, Gao C, Wang S, Wang F, Li D, Zeng X, Deng Q, Wang Q, Zhang B, Tang H, Chen W, Xiao Y. MGMT hypomethylation is associated with DNA damage in workers exposed to low-dose benzene. Biomarkers 2017; 22:470-475. [DOI: 10.1080/1354750x.2016.1274335] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jie Li
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Xinjie Zhang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Zhini He
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Qing Sun
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Fei Qin
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Zhenlie Huang
- Guangdong Provincial Key Laboratory of Occupational Disease Prevention and Treatment, Guangdong Province Hospital for Occupational Disease Prevention and Treatment, Guangzhou, China
| | - Xiao Zhang
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xin Sun
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Linhua Liu
- Department of Toxicology, School of Public Health, Guangdong Medical University, Guangzhou, China
| | - Liping Chen
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Chen Gao
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Shan Wang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Fangping Wang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Daochuan Li
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Xiaowen Zeng
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Qifei Deng
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Qing Wang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Bo Zhang
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Huanwen Tang
- Department of Toxicology, School of Public Health, Guangdong Medical University, Guangzhou, China
| | - Wen Chen
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Yongmei Xiao
- Guangzhou Key Laboratory of Environmental Pollution and Health Risk Assessment, Department of Toxicology, School of Public Health, Sun Yat-sen University, Guangzhou, China
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Mendes M, Machado JMH, Durand A, Costa-Amaral IC, Valente D, Gonçalves ES, Arcuri ASA, Trevisan EA, Sarcinelli PDN, Larentis AL, Moura-Correa MJ, André LC. Normas ocupacionais do benzeno: uma abordagem sobre o risco e exposição nos postos de revenda de combustíveis. REVISTA BRASILEIRA DE SAÚDE OCUPACIONAL 2017. [DOI: 10.1590/2317-6369000127515] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Resumo Introdução: trabalhadores estão sujeitos a riscos decorrentes da exposição ambiental e ocupacional ao benzeno, situação ainda mais crítica quando associada a fatores como desigualdade social, múltipla exposição, suscetibilidade individual, degradação ambiental e às possíveis interações entre os contaminantes ambientais. Além disso, nem sempre as regulamentações são estabelecidas e/ou atualizadas apenas a partir de achados científicos, pois são processos permeados por conflitos de interesses. Objetivo: realizar análise crítica sobre a identificação de risco e avaliação da exposição ao benzeno. Métodos: revisão bibliográfica e documental do marco normativo brasileiro e internacional sobre exposição ao benzeno, com relação aos aspectos toxicológicos, de exposição ocupacional e ambiental e de avaliação de risco. Discussão: o controle da exposição ao benzeno permeia o campo da disputa técnico-política de saúde e segurança, constituindo-se em marco regulatório resultante de consenso de entendimentos. Esses entendimentos são marcados pela disputa entre a proteção à saúde e a gestão empresarial das condições de trabalho, em detrimento das evidencias científicas. Em tal contexto, os Limites de Exposição Ocupacional podem variar significativamente entre os países e agências, apesar do reconhecimento universal de que não há limites seguros para exposição ao benzeno, por ser um composto carcinogênico.
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Fonseca ASA, Costa DF, Dapper V, Machado JMH, Valente D, Carvalho LVBD, Costa-Amaral IC, Alves SR, Sarcinelli PDN, Menezes MAC, Larentis AL, Moura-Correa MJ, Mattos RDCODC. Classificação clínico-laboratorial para manejo clínico de trabalhadores expostos ao benzeno em postos de revenda de combustíveis. REVISTA BRASILEIRA DE SAÚDE OCUPACIONAL 2017. [DOI: 10.1590/2317-6369000127115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Resumo Introdução: trabalhadores de postos de revenda de combustíveis estão expostos a compostos orgânicos voláteis, dos quais se destaca o benzeno. O manejo clínico do amplo espectro de sinais e sintomas desses trabalhadores ainda é um desafio para assistência em saúde. Objetivo: apresentar proposta de classificação clínico-laboratorial baseada na análise de hemograma e na avaliação clínica dos trabalhadores, para orientar a conduta dos profissionais de saúde. Métodos: a classificação clínico-laboratorial foi definida a partir de critérios de hierarquização dos resultados das avaliações clínicas e de vigilância à saúde de modo a possibilitar a organização dos procedimentos e fluxos de atenção à saúde. Resultados: a proposta define o manejo clínico com base na classificação dos expostos ao benzeno em quatro níveis de alterações clínico-laboratoriais que determinam os procedimentos compatíveis com o grau da exposição e de seus efeitos à saúde: 1) sem alterações significativas; 2) alterações inespecíficas ou incompletas, 3) alterações clínicas e/ou laboratoriais; 4) alterações sugestivas de benzenismo. Conclusão: a proposta de classificação dos achados clínico-laboratoriais é potencialmente capaz de orientar a conduta médica na avaliação das condições de saúde e dos riscos da exposição ao benzeno e de subsidiar o monitoramento sistemático e contínuo necessário para a definição de rotinas assistenciais para os coletivos de trabalhadores.
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Poynter JN, Richardson M, Roesler M, Blair CK, Hirsch B, Nguyen P, Cioc A, Cerhan JR, Warlick E. Chemical exposures and risk of acute myeloid leukemia and myelodysplastic syndromes in a population-based study. Int J Cancer 2017; 140:23-33. [PMID: 27603749 PMCID: PMC5245124 DOI: 10.1002/ijc.30420] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 08/19/2016] [Indexed: 01/04/2023]
Abstract
Benzene exposure is one of the few well-established risk factors for myeloid malignancy. Exposure to other chemicals has been inconsistently associated with hematologic malignancies. We evaluated occupational and residential chemical exposures as risk factors for acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS) using population-based data. AML and MDS cases were identified by the Minnesota Cancer Surveillance System. Controls were identified through the Minnesota driver's license/identification card list. Chemical exposures were measured by self-report. Unconditional logistic regression was used to calculate odds ratios (ORs) and 95% confidence intervals (CI). We included 265 MDS cases, 420 AML cases and 1388 controls. We observed significant associations between both MDS and AML and benzene (OR = 1.77, 95% CI 1.19, 2.63 and OR = 2.10, 95% CI 1.35, 3.28, respectively) and vinyl chlorides (OR = 2.05, 95% CI 1.15, 3.63 and OR = 2.81, 95% CI 1.14, 6.92). Exposure to soot, creosote, inks, dyes and tanning solutions and coal dust were associated with AML (range ORs = 2.68-4.03), while no association was seen between these exposures and MDS (range ORs = 0.57-1.68). Pesticides and agricultural chemicals were not significantly associated with AML or MDS. Similar results were observed in analyses stratified by sex. In addition to providing risk estimates for benzene from a population-based sample, we also identified a number of other occupational and residential chemicals that were significantly associated with AML; however, all exposures were reported by only a small percentage of cases (≤10%). While chemical exposures play a clear role in the etiology of myeloid malignancy, these exposures do not account for the majority of cases.
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Affiliation(s)
- Jenny N. Poynter
- Division of Epidemiology and Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN
| | - Michaela Richardson
- Division of Epidemiology and Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN
| | - Michelle Roesler
- Division of Epidemiology and Clinical Research, Department of Pediatrics, University of Minnesota, Minneapolis, MN
| | - Cindy K. Blair
- Department of Internal Medicine, University of New Mexico, Albuquerque, NM
- University of New Mexico Comprehensive Cancer Center, Albuquerque, NM
| | - Betsy Hirsch
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN
| | - Phuong Nguyen
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN
| | | | - James R. Cerhan
- Division of Epidemiology, Department of Health Sciences Research, Mayo Clinic, Rochester, MN
| | - Erica Warlick
- Blood and Marrow Transplant Program, Division of Hematology, Oncology, and Transplantation, University of Minnesota, Minneapolis, MN
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Sun R, Cao M, Zhang J, Yang W, Wei H, Meng X, Yin L, Pu Y. Benzene Exposure Alters Expression of Enzymes Involved in Fatty Acid β-Oxidation in Male C3H/He Mice. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13111068. [PMID: 27809262 PMCID: PMC5129278 DOI: 10.3390/ijerph13111068] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 10/21/2016] [Accepted: 10/24/2016] [Indexed: 12/29/2022]
Abstract
Benzene is a well-known hematotoxic carcinogen that can cause leukemia and a variety of blood disorders. Our previous study indicated that benzene disturbs levels of metabolites in the fatty acid β-oxidation (FAO) pathway, which is crucial for the maintenance and function of hematopoietic and leukemic cells. The present research aims to investigate the effects of benzene on changes in the expression of key enzymes in the FAO pathway in male C3H/He mice. Results showed that benzene exposure caused reduced peripheral white blood cell (WBC), red blood cell (RBC), platelet (Pit) counts, and hemoglobin (Hgb) concentration. Investigation of the effects of benzene on the expression of FA transport- and β-oxidation-related enzymes showed that expression of proteins Cpt1a, Crat, Acaa2, Aldh1l2, Acadvl, Crot, Echs1, and Hadha was significantly increased. The ATP levels and mitochondrial membrane potential decreased in mice exposed to benzene. Meanwhile, reactive oxygen species (ROS), hydrogen peroxide (H2O2), and malondialdehyde (MDA) levels were significantly increased in the benzene group. Our results indicate that benzene induces increased expression of FA transport and β-oxidation enzymes, mitochondrial dysfunction, and oxidative stress, which may play a role in benzene-induced hematotoxicity.
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Affiliation(s)
- Rongli Sun
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China.
| | - Meng Cao
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China.
| | - Juan Zhang
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China.
| | - Wenwen Yang
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China.
| | - Haiyan Wei
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China.
| | - Xing Meng
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China.
| | - Lihong Yin
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China.
| | - Yuepu Pu
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, Jiangsu, China.
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Akerstrom M, Almerud P, Andersson EM, Strandberg B, Sallsten G. Personal exposure to benzene and 1,3-butadiene during petroleum refinery turnarounds and work in the oil harbour. Int Arch Occup Environ Health 2016; 89:1289-1297. [PMID: 27568022 PMCID: PMC5052356 DOI: 10.1007/s00420-016-1163-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 08/22/2016] [Indexed: 11/28/2022]
Abstract
Purpose Petroleum refinery workers’ exposure to the carcinogens benzene and 1,3-butadiene has decreased during normal operations. However, certain occupational groups or events at the refineries still involve a risk of higher exposures. The aim of this study was to examine the personal exposure to benzene and 1,3-butadiene at refinery turnarounds and during work in the oil harbour. Methods Personal exposure measurements of benzene and 1,3-butadiene were taken during work shifts, with a priori assumed higher benzene exposure, using PerkinElmer diffusive samplers filled with Carbopack X. Mean exposure levels were calculated, and repeated exposure measurements, when available, were assessed using mixed effect models. Group and individual compliance with the Swedish occupational exposure limit (OEL) was tested for the different exposure groups. Results Mean benzene exposure levels for refinery workers during the three measured turnarounds were 150, 610 and 960 µg/m3, and mean exposures for oil harbour workers and sewage tanker drivers were 310 and 360 µg/m3, respectively. Higher exposures were associated with handling benzene-rich products. Most occupational groups did not comply with the Swedish OEL for benzene nor did the individuals within the groups. The exposure to 1,3-butadiene was very low, between <1 and 3 % of the Swedish OEL. Conclusions Work within the petroleum refinery industry, with potential exposure to open product streams containing higher fractions of benzene, pose a risk of personal benzene exposures exceeding the OEL. Refinery workers performing these work tasks frequently, such as contractors, sewage tanker drivers and oil harbour workers, need to be identified and protected.
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Affiliation(s)
- M Akerstrom
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, PO Box 414, 405 30, Göteborg, Sweden.
| | - P Almerud
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, PO Box 414, 405 30, Göteborg, Sweden
| | - E M Andersson
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, PO Box 414, 405 30, Göteborg, Sweden
| | - B Strandberg
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, PO Box 414, 405 30, Göteborg, Sweden
| | - G Sallsten
- Department of Occupational and Environmental Medicine, Sahlgrenska University Hospital and Academy, University of Gothenburg, PO Box 414, 405 30, Göteborg, Sweden
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Persistence of Breakage in Specific Chromosome Bands 6 Years after Acute Exposure to Oil. PLoS One 2016; 11:e0159404. [PMID: 27479010 PMCID: PMC4969035 DOI: 10.1371/journal.pone.0159404] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Accepted: 07/02/2016] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND The identification of breakpoints involved in chromosomal damage could help to detect genes involved in genetic disorders, most notably cancer. Until now, only one published study, carried out by our group, has identified chromosome bands affected by exposure to oil from an oil spill. In that study, which was performed two years after the initial oil exposure in individuals who had participated in clean-up tasks following the wreck of the Prestige, three chromosomal bands (2q21, 3q27, 5q31) were found to be especially prone to breakage. A recent follow-up study, performed on the same individuals, revealed that the genotoxic damage had persisted six years after oil exposure. OBJECTIVES To determine whether there exist chromosome bands which are especially prone to breakages and to know if there is some correlation with those detected in the previous study. In addition, to investigate if the DNA repair problems detected previously persist in the present study. DESIGN Follow-up study performed six years after the Prestige oil spill. SETTING Fishermen cooperatives in coastal villages. PARTICIPANTS Fishermen highly exposed to oil spill who participated in previous genotoxic study six years after the oil. MEASUREMENTS Chromosome damage in peripheral lymphocytes. For accurate identification of the breakpoints involved in chromosome damage of circulating lymphocytes, a sequential stain/G-banding technique was employed. To determine the most break-prone chromosome bands, two statistical methods, the Fragile Site Multinomial and the chi-square tests (where the bands were corrected by their length) were used. To compare the chromosome lesions, structural chromosome alterations and gaps/breaks between two groups of individuals we used the GEE test which takes into account a possible within-individual correlation. Dysfunctions in DNA repair mechanisms, expressed as chromosome damage, were assessed in cultures with aphidicolin by the GEE test. RESULTS Cytogenetic analyses were performed in 47 exposed individuals. A total of 251 breakpoints in exposed individuals) were identified, showing a non-uniform distribution in the human ideogram. Ten chromosome bands were found to be especially prone to breakage through both statistical methods. By comparing these bands with those observed in certain exposed individuals who had already participated the previous study, it was found in both studies that four bands (2q21, 3q27, 5q31 and 17p11.2) are particularly sensitive to breakage. Additionally, the dysfunction in DNA repair mechanisms was not significantly higher in oil-exposed individuals than in non-exposed individuals. LIMITATIONS The sample size and the possibility of some kind of selection bias should be considered. Genotoxic results cannot be extrapolated to the high number of individuals who participated occasionally in clean-up tasks. CONCLUSION Our findings show the existence of at least four target bands (2q21, 3q27, 5q31 and 17p11.2) with a greater propensity to break over time after an acute exposure to oil. The breaks in these bands, which are commonly involved in hematological cancer, may explain the increase of cancer risk reported in chronically benzene-exposed individuals. In addition, a more efficiency of the DNA repair mechanisms has been detected six years after in fishermen who were highly exposed to the oil spill. To date, only this study, performed by our group on the previous and present genotoxic effects, has analyzed the chromosomal regions affected by breakage after an acute oil exposure.
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83
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Son MY, Deng CX, Hoeijmarkers JH, Rebel VI, Hasty P. A mechanism for 1,4-Benzoquinone-induced genotoxicity. Oncotarget 2016; 7:46433-46447. [PMID: 27340773 PMCID: PMC5216808 DOI: 10.18632/oncotarget.10184] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 05/22/2016] [Indexed: 12/30/2022] Open
Abstract
Benzene is a common environmental toxin and its metabolite, 1-4-Benzoquinone (BQ) causes hematopoietic cancers like myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML). BQ has not been comprehensively assessed for its impact on genome maintenance, limiting our understanding of the true health risks associated with benzene exposure and our ability to identify people with increased sensitivity to this genotoxin. Here we analyze the impact BQ exposure has on wild type and DNA repair-defective mouse embryonic stem (ES) cells and wild type human cells. We find that double strand break (DSB) repair and replication fork maintenance pathways including homologous recombination (HR) and Fanconi anemia (FA) suppress BQ toxicity. BQ-induced damage efficiently stalls replication forks, yet poorly induces ATR/DNA-PKCS responses. Furthermore, the pattern of BQ-induced γH2AX and 53BP1foci is consistent with the formation of poly(ADP-ribose) polymerase 1 (PARP1)-stabilized regressed replication forks. At a biochemical level, BQ inhibited topoisomerase 1 (topo1)-mediated DNA ligation and nicking in vitro; thus providing mechanism for the cellular phenotype. These data are consistent with a model that proposes BQ interferes with type I topoisomerase's ability to maintain replication fork restart and progression leading to chromosomal instability that has the potential to cause hematopoietic cancers like MDS and AML.
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Affiliation(s)
- Mi Young Son
- Department of Molecular Medicine and Institute of Biotechnology, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Chu-Xia Deng
- Faculty of Health Sciences, University of Macau, Macau SAR China
| | - Jan H. Hoeijmarkers
- Department of Genetics, Cancer Genomics Netherlands, Erasmus MC, The Netherlands
| | - Vivienne I. Rebel
- Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
- The Cancer Therapy Research Center, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
- The Barshop Center of Aging, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
- Greehey Children's Cancer Research Center, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
- Current address: BioAffinity, San Antonio, Texas, USA
| | - Paul Hasty
- Department of Molecular Medicine and Institute of Biotechnology, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
- The Cancer Therapy Research Center, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
- The Barshop Center of Aging, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
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84
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Kristbjornsdottir A, Aspelund T, Rafnsson V. Association of Cancer Incidence and Duration of Residence in Geothermal Heating Area in Iceland: An Extended Follow-Up. PLoS One 2016; 11:e0155922. [PMID: 27205903 PMCID: PMC4874673 DOI: 10.1371/journal.pone.0155922] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 05/01/2016] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Residents of geothermal areas have higher incidence of non-Hodgkin's lymphoma, breast cancer, prostate cancer, and kidney cancers than others. These populations are exposed to chronic low-level ground gas emissions and various pollutants from geothermal water. The aim was to assess whether habitation in geothermal areas and utilisation of geothermal water is associated with risk of cancer according to duration of residence. METHODS The cohort obtained from the census 1981 was followed to the end of 2013. Personal identifier was used in record linkage with nation-wide emigration, death, and cancer registries. The exposed population, defined by community codes, was located on young bedrock and had utilised geothermal water supply systems since 1972. Two reference populations were located by community codes on older bedrock or had not utilised geothermal water supply systems for as long a period as had the exposed population. Adjusted hazard ratio (HR), 95% confidence intervals (CI) non-stratified and stratified on cumulative years of residence were estimated in Cox-model. RESULTS The HR for all cancer was 1.21 (95% CI 1.12-1.30) as compared with the first reference area. The HR for pancreatic cancer was 1.93 (1.22-3.06), breast cancer, 1.48 (1.23-1.80), prostate cancer 1.47 (1.22-1.77), kidney cancer 1.46 (1.03-2.05), lymphoid and haematopoietic tissue 1.54 (1.21-1.97), non-Hodgkin´s lymphoma 2.08 (1.38-3.15) and basal cell carcinoma of the skin 1.62 (1.35-1.94). Positive dose-response relationship was observed between incidence of cancers and duration of residence, and between incidence of cancer and degree of geothermal/volcanic activity in the comparison areas. CONCLUSIONS The higher cancer incidence in geothermal areas than in reference areas is consistent with previous findings. As the dose-response relationships were positive between incidence of cancers and duration of residence, it is now more urgent than before to investigate the chemical and physical content of the geothermal water and of the ambient air of the areas to detect recognized or new carcinogens.
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Affiliation(s)
| | - Thor Aspelund
- Centre of Public Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Vilhjalmur Rafnsson
- Department of Preventive Medicine, Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- * E-mail:
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Incidence of Myelodysplastic Syndrome in UK Petroleum Distribution and Oil Refinery Workers, 1995-2011. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13050474. [PMID: 27164123 PMCID: PMC4881099 DOI: 10.3390/ijerph13050474] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/11/2016] [Accepted: 04/28/2016] [Indexed: 11/17/2022]
Abstract
The incidence of myelodysplastic syndrome (MDS) experienced by cohorts of 16,467 petroleum distribution workers and 28,554 oil refinery workers has been investigated. Study subjects were all those male employees first employed at one of 476 UK petroleum distribution centres or eight UK oil refineries in the period 1946–1974; all subjects had a minimum of twelve months employment with some employment after 1st January, 1951. Observed numbers (Obs) of MDS cases were compared with expectations based on national incidence rates for the period 1995–2011. The overall standardised registration ratio (SRR) was 73 (Obs = 17) in petroleum distribution workers for the age-range 15–84 years, and 77 (Obs = 21) for the age-range 15–99 years. The overall SRR was 81 (Obs = 29) in oil refinery workers for the age-range 15–84 years, and 83 (Obs = 36) for the age-range 15–99 years. More detailed analyses were carried out in terms of year of registration, period from hire, decade of hire, and duration of employment. The overall SRR findings did not provide clear evidence for the presence of an occupational cancer hazard, and provide no support for the hypothesis that low-level benzene exposure has an important effect on the risks of MDS.
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Bassig BA, Zhang L, Vermeulen R, Tang X, Li G, Hu W, Guo W, Purdue MP, Yin S, Rappaport SM, Shen M, Ji Z, Qiu C, Ge Y, Hosgood HD, Reiss B, Wu B, Xie Y, Li L, Yue F, Freeman LEB, Blair A, Hayes RB, Huang H, Smith MT, Rothman N, Lan Q. Comparison of hematological alterations and markers of B-cell activation in workers exposed to benzene, formaldehyde and trichloroethylene. Carcinogenesis 2016; 37:692-700. [PMID: 27207665 DOI: 10.1093/carcin/bgw053] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 04/27/2016] [Indexed: 01/19/2023] Open
Abstract
Benzene, formaldehyde (FA) and trichloroethylene (TCE) are ubiquitous chemicals in workplaces and the general environment. Benzene is an established myeloid leukemogen and probable lymphomagen. FA is classified as a myeloid leukemogen but has not been associated with non-Hodgkin lymphoma (NHL), whereas TCE has been associated with NHL but not myeloid leukemia. Epidemiologic associations between FA and myeloid leukemia, and between benzene, TCE and NHL are, however, still debated. Previously, we showed that these chemicals are associated with hematotoxicity in cross-sectional studies of factory workers in China, which included extensive personal monitoring and biological sample collection. Here, we compare and contrast patterns of hematotoxicity, monosomy 7 in myeloid progenitor cells (MPCs), and B-cell activation biomarkers across these studies to further evaluate possible mechanisms of action and consistency of effects with observed hematologic cancer risks. Workers exposed to benzene or FA, but not TCE, showed declines in cell types derived from MPCs, including granulocytes and platelets. Alterations in lymphoid cell types, including B cells and CD4+ T cells, and B-cell activation markers were apparent in workers exposed to benzene or TCE. Given that alterations in myeloid and lymphoid cell types are associated with hematological malignancies, our data provide biologic insight into the epidemiological evidence linking benzene and FA exposure with myeloid leukemia risk, and TCE and benzene exposure with NHL risk.
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Affiliation(s)
| | - Luoping Zhang
- Division of Environmental Health Sciences, School of Public Health, University of California at Berkeley, Berkeley, CA, USA
| | - Roel Vermeulen
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands
| | | | - Guilan Li
- Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | | | - Weihong Guo
- Division of Environmental Health Sciences, School of Public Health, University of California at Berkeley, Berkeley, CA, USA
| | | | - Songnian Yin
- Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Stephen M Rappaport
- Division of Environmental Health Sciences, School of Public Health, University of California at Berkeley, Berkeley, CA, USA
| | | | - Zhiying Ji
- Division of Environmental Health Sciences, School of Public Health, University of California at Berkeley, Berkeley, CA, USA
| | - Chuangyi Qiu
- Guangdong Poison Control Center, Guangzhou, China
| | - Yichen Ge
- Guangdong Poison Control Center, Guangzhou, China
| | - H Dean Hosgood
- Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Boris Reiss
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, USA and
| | - Banghua Wu
- Guangdong Poison Control Center, Guangzhou, China
| | - Yuxuan Xie
- Guangdong Poison Control Center, Guangzhou, China
| | - Laiyu Li
- Guangdong Poison Control Center, Guangzhou, China
| | - Fei Yue
- Guangdong Poison Control Center, Guangzhou, China
| | | | | | - Richard B Hayes
- Division of Epidemiology, Department of Environmental Medicine, New York University School of Medicine, New York, NY, USA
| | - Hanlin Huang
- Guangdong Poison Control Center, Guangzhou, China
| | - Martyn T Smith
- Division of Environmental Health Sciences, School of Public Health, University of California at Berkeley, Berkeley, CA, USA
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87
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Evaluation of Acute Nonlymphocytic Leukemia and Its Subtypes With Updated Benzene Exposure and Mortality Estimates. J Occup Environ Med 2016; 58:414-20. [DOI: 10.1097/jom.0000000000000689] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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88
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Carbonari D, Chiarella P, Mansi A, Pigini D, Iavicoli S, Tranfo G. Biomarkers of susceptibility following benzene exposure: influence of genetic polymorphisms on benzene metabolism and health effects. Biomark Med 2016; 10:145-63. [PMID: 26764284 DOI: 10.2217/bmm.15.106] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Benzene is a ubiquitous occupational and environmental pollutant. Improved industrial hygiene allowed airborne concentrations close to the environmental context (1-1000 µg/m(3)). Conversely, new limits for benzene levels in urban air were set (5 µg/m(3)). The biomonitoring of exposure to such low benzene concentrations are performed measuring specific and sensitive biomarkers such as S-phenylmercapturic acid, trans, trans-muconic acid and urinary benzene: many studies referred high variability in the levels of these biomarkers, suggesting the involvement of polymorphic metabolic genes in the individual susceptibility to benzene toxicity. We reviewed the influence of metabolic polymorphisms on the biomarkers levels of benzene exposure and effect, in order to understand the real impact of benzene exposure on subjects with increased susceptibility.
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Affiliation(s)
- Damiano Carbonari
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
| | - Pieranna Chiarella
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
| | - Antonella Mansi
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
| | - Daniela Pigini
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
| | - Sergio Iavicoli
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
| | - Giovanna Tranfo
- INAIL Reaserch, Department of Occupational & Environmental Medicine, Epidemiology & Hygiene, Via Fontana Candida 1 - 00040 Monte Porzio Catone (RM), Italy
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89
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Benzene-Induced Aberrant miRNA Expression Profile in Hematopoietic Progenitor Cells in C57BL/6 Mice. Int J Mol Sci 2015; 16:27058-71. [PMID: 26569237 PMCID: PMC4661859 DOI: 10.3390/ijms161126001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 10/29/2015] [Accepted: 11/02/2015] [Indexed: 12/24/2022] Open
Abstract
Benzene is a common environmental pollutant that causes hematological alterations. MicroRNAs (miRNAs) may play a role in benzene-induced hematotoxicity. In this study, C57BL/6 mice showed significant hematotoxicity after exposure to 150 mg/kg benzene for 4 weeks. Benzene exposure decreased not only the number of cells in peripheral blood but also hematopoietic progenitor cells in the bone marrow. Meanwhile, RNA from Lin− cells sorted from the bone marrow was applied to aberrant miRNA expression profile using Illumina sequencing. We found that 5 miRNAs were overexpressed and 45 miRNAs were downregulated in the benzene exposure group. Sequencing results were confirmed through qRT-PCR. Furthermore, we also identified five miRNAs which significantly altered in Lin−c-Kit+ cells obtained from benzene-exposed mice, including mmu-miR-34a-5p; mmu-miR-342-3p; mmu-miR-100-5p; mmu-miR-181a-5p; and mmu-miR-196b-5p. In summary, we successfully established a classical animal model to induce significant hematotoxicity by benzene injection. Benzene exposure may cause severe hematotoxicity not only to blood cells in peripheral circulation but also to hematopoietic cells in bone marrow. Benzene exposure also alters miRNA expression in hematopoietic progenitor cells. This study suggests that benzene induces alteration in hematopoiesis and hematopoiesis-associated miRNAs.
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90
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Williams PRD, Mani A. Benzene Exposures and Risk Potential for Vehicle Mechanics from Gasoline and Petroleum-Derived Products. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2015; 18:371-399. [PMID: 26514691 DOI: 10.1080/10937404.2015.1088810] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Benzene exposures among vehicle mechanics in the United States and abroad were characterized using available data from published and unpublished studies. In the United States, the time-weighted-average (TWA) airborne concentration of benzene for vehicle mechanics averaged 0.01-0.05 ppm since at least the late 1970s, with maximal TWA concentrations ranging from 0.03 to 0.38 ppm. Benzene exposures were notably lower in the summer than winter and in the Southwest compared to other geographic regions, but significantly higher during known gasoline-related tasks such as draining a gas tank or changing a fuel pump or fuel filter. Measured airborne concentrations of benzene were also generally greater for vehicle mechanics in other countries, likely due to the higher benzene content of gasoline and other factors. Short-term airborne concentrations of benzene frequently exceeded 1 ppm during gasoline-related tasks, but remained below 0.2 ppm for tasks involving other petroleum-derived products such as carburetor and brake cleaner or parts washer solvent. Application of a two-zone mathematical model using reasonable input values from the literature yielded predicted task-based benzene concentrations during gasoline and aerosol spray cleaner scenarios similar to those measured for vehicle mechanics during these types of tasks. When evaluated using appropriate biomarkers, dermal exposures were found to contribute little to total benzene exposures for this occupational group. Available data suggest that vehicle mechanics have not experienced significant exposures to benzene in the workplace, except perhaps during short-duration gasoline-related tasks, and full-shift benzene exposures have remained well below current and contemporaneous occupational exposure limits. These findings are consistent with epidemiology studies of vehicle mechanics, which have not demonstrated an increased risk of benzene-induced health effects in this cohort of workers. Data and information presented here may be used to assess past, current, or future exposures and risks to benzene for vehicle mechanics who may be exposed to gasoline or other petroleum-derived products.
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Affiliation(s)
| | - Ashutosh Mani
- b Department of Environmental Health , University of Cincinnati , Cincinnati , Ohio , USA
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91
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Persano L, Zagoura D, Louisse J, Pistollato F. Role of Environmental Chemicals, Processed Food Derivatives, and Nutrients in the Induction of Carcinogenesis. Stem Cells Dev 2015; 24:2337-52. [DOI: 10.1089/scd.2015.0081] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Luca Persano
- Istituto di Riceca Pediatrica Città della Speranza—IRP, Padova, Italy
- Department of Woman and Child Health, University of Padova, Padova, Italy
| | - Dimitra Zagoura
- Laboratory of Biology, University of Athens School of Medicine, Athens, Greece
| | - Jochem Louisse
- Division of Toxicology, Wageningen University, Wageningen, the Netherlands
| | - Francesca Pistollato
- Center for Nutrition & Health, Universidad Europea del Atlantico (UEA), Santander, Spain
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92
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Gudzenko N, Hatch M, Bazyka D, Dyagil I, Reiss RF, Brenner A, Chumak V, Babkina N, Zablotska LB, Mabuchi K. Non-radiation risk factors for leukemia: A case-control study among chornobyl cleanup workers in Ukraine. ENVIRONMENTAL RESEARCH 2015; 142:72-6. [PMID: 26117815 PMCID: PMC4609257 DOI: 10.1016/j.envres.2015.06.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 06/12/2015] [Accepted: 06/13/2015] [Indexed: 05/27/2023]
Abstract
BACKGROUND Occupational and environmental exposure to chemicals such as benzene has been linked to increased risk of leukemia. Cigarette smoking and alcohol consumption have also been found to affect leukemia risk. Previous analyses in a large cohort of Chornobyl clean-up workers in Ukraine found significant radiation-related increased risk for all leukemia types. We investigated the potential for additional effects of occupational and lifestyle factors on leukemia risk in this radiation-exposed cohort. METHODS In a case-control study of chronic lymphocytic and other leukemias among Chornobyl cleanup workers, we collected data on a range of non-radiation exposures. We evaluated these and other potential risk factors in analyses adjusting for estimated bone marrow radiation dose. We calculated Odds Ratios and 95% Confidence Intervals in relation to lifestyle factors and occupational hazards. RESULTS After adjusting for radiation, we found no clear association of leukemia risk with smoking or alcohol but identified a two-fold elevated risk for non-CLL leukemia with occupational exposure to petroleum (OR=2.28; 95% Confidence Interval 1.13, 6.79). Risks were particularly high for myeloid leukemias. No associations with risk factors other than radiation were found for chronic lymphocytic leukemia. CONCLUSIONS These data - the first from a working population in Ukraine - add to evidence from several previous reports of excess leukemia morbidity in groups exposed environmentally or occupationally to petroleum or its products.
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Affiliation(s)
- N Gudzenko
- National Research Center for Radiation Medicine, Kyiv, Ukraine.
| | - M Hatch
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA.
| | - D Bazyka
- National Research Center for Radiation Medicine, Kyiv, Ukraine.
| | - I Dyagil
- National Research Center for Radiation Medicine, Kyiv, Ukraine.
| | - R F Reiss
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY, USA.
| | - A Brenner
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA.
| | - V Chumak
- National Research Center for Radiation Medicine, Kyiv, Ukraine.
| | - N Babkina
- National Research Center for Radiation Medicine, Kyiv, Ukraine.
| | - L B Zablotska
- Department of Epidemiology and Biostatistics, School of Medicine, University of California, San Francisco, San Francisco, CA, USA.
| | - K Mabuchi
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA.
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93
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Bassig BA, Friesen MC, Vermeulen R, Shu XO, Purdue MP, Stewart PA, Xiang YB, Chow WH, Zheng T, Ji BT, Yang G, Linet MS, Hu W, Zhang H, Zheng W, Gao YT, Rothman N, Lan Q. Occupational Exposure to Benzene and Non-Hodgkin Lymphoma in a Population-Based Cohort: The Shanghai Women's Health Study. ENVIRONMENTAL HEALTH PERSPECTIVES 2015; 123:971-7. [PMID: 25748391 PMCID: PMC4590744 DOI: 10.1289/ehp.1408307] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 03/04/2015] [Indexed: 05/15/2023]
Abstract
BACKGROUND The association between benzene exposure and non-Hodgkin lymphoma (NHL) has been the subject of debate as a result of inconsistent epidemiologic evidence. An International Agency for Research on Cancer (IARC) working group evaluated benzene in 2009 and noted evidence for a positive association between benzene exposure and NHL risk. OBJECTIVE We evaluated the association between occupational benzene exposure and NHL among 73,087 women enrolled in the prospective population-based Shanghai Women's Health Study. METHODS Benzene exposure estimates were derived using a previously developed exposure assessment framework that combined ordinal job-exposure matrix intensity ratings with quantitative benzene exposure measurements from an inspection database of Shanghai factories collected between 1954 and 2000. Associations between benzene exposure metrics and NHL (n = 102 cases) were assessed using Cox proportional hazard models, with study follow-up occurring from December 1996 through December 2009. RESULTS Women ever exposed to benzene had a significantly higher risk of NHL [hazard ratio (HR) = 1.87, 95% CI: 1.19, 2.96]. Compared with unexposed women, significant trends in NHL risk were observed for increasing years of benzene exposure (p(trend) = 0.006) and increasing cumulative exposure levels (p(trend) = 0.005), with the highest duration and cumulative exposure tertiles having a significantly higher association with NHL (HR = 2.07, 95% CI: 1.07, 4.01 and HR = 2.16, 95% CI: 1.17, 3.98, respectively). CONCLUSIONS Our findings, using a population-based prospective cohort of women with diverse occupational histories, provide additional evidence that occupational exposure to benzene is associated with NHL risk.
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Affiliation(s)
- Bryan A Bassig
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute (NCI), National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Bethesda, Maryland, USA
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94
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Gross SA, Fedak KM. Applying a Weight-of-Evidence Approach to Evaluate Relevance of Molecular Landscapes in the Exposure-Disease Paradigm. BIOMED RESEARCH INTERNATIONAL 2015; 2015:515798. [PMID: 26339619 PMCID: PMC4538402 DOI: 10.1155/2015/515798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2014] [Accepted: 03/16/2015] [Indexed: 12/04/2022]
Abstract
Information on polymorphisms, mutations, and epigenetic events has become increasingly important in our understanding of molecular mechanisms associated with exposures-disease outcomes. Molecular landscapes can be developed to illustrate the molecular characteristics for environmental carcinogens as well as associated disease outcomes, although comparison of these molecular landscapes can often be difficult to navigate. We developed a method to organize these molecular data that uses a weight-of-evidence approach to rank overlapping molecular events by relative importance for susceptibility to an exposure-disease paradigm. To illustrate the usefulness of this approach, we discuss the example of benzene as an environmental carcinogen and myelodysplastic syndrome (MDS) as a causative disease endpoint. Using this weight-of-evidence method, we found overlapping polymorphisms in the genes for the metabolic enzymes GST and NQO1, both of which may infer risk of benzene-induced MDS. Polymorphisms in the tumor suppressor gene, TP53, and the inflammatory cytokine gene, TNF-α, were also noted, albeit inferring opposing outcomes. The alleles identified in the DNA repair gene RAD51 indicated an increased risk for MDS in MDS patients and low blood cell counts in benzene-exposed workers. We propose the weight-of-evidence approach as a tool to assist in organizing the sea of emerging molecular data in exposure-disease paradigms.
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Affiliation(s)
- Sherilyn A. Gross
- Cardno ChemRisk, 4840 Pearl East Circle 300 W., Boulder, CO 80304, USA
| | - Kristen M. Fedak
- Department of Environmental & Radiological Health Sciences, Colorado State University, Fort Collins, CO 80523, USA
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95
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Liu B, Kerath SM, Sekeres MA, Fryzek JP, Sreekantaiah C, Mason CR, Kolitz J, Taioli E. Myelodysplastic syndromes spatial clusters in disease etiology and outcome. Leuk Lymphoma 2015; 57:392-399. [PMID: 26159047 DOI: 10.3109/10428194.2015.1071487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The myelodysplastic syndromes (MDS) are a heterogeneous group of hematopoietic disorders. This study aims to advance the use of spatial modeling in disease etiology and monitoring based on reports on a large population (n = 984) of MDS patients diagnosed in the Eastern United States. The spatial MDS clustering was analyzed using SaTScan, and patient clinical characteristics were analyzed using logistic regression and Cox hazards models adjusting for covariates. One main and five secondary spatial clusters (p-value < 10-17-10-7) were identified. Patients living in high vs. low MDS incidence clusters tended to be older (ORadj = 1.04 [1.004, 1.07]) and smokers (ORadj = 2.9 [1.1, 7.4]). Mortality was associated with hemoglobin (HRadj = 0.7 [0.5, 0.9]), neutrophils (HRadj = 0.7 [0.6, 0.96]), platelets (HRadj = 0.5 [0.4, 0.7]), and blast (HRadj = 1.4 [1.1, 1.8]), but not clusters. The results suggest large geographic variations in MDS incidence rates. The biological aggressiveness of the disease is unlikely to be associated with its spatial distribution.
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Affiliation(s)
- Bian Liu
- a Department of Population Health Science and Policy , Icahn School of Medicine at Mount Sinai , NY , USA
| | - Samantha M Kerath
- b Department of Population Health , The Feinstein Institute for Medical Research, Hofstra North Shore-LIJ School of Medicine , NY , USA
| | | | | | | | - Christopher R Mason
- f Department of Hematologic Oncology , North Shore-LIJ Health System , NY , USA
| | - Jonathan Kolitz
- f Department of Hematologic Oncology , North Shore-LIJ Health System , NY , USA
| | - Emanuela Taioli
- a Department of Population Health Science and Policy , Icahn School of Medicine at Mount Sinai , NY , USA
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96
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Glass DC, Wood E, Del Monaco A, Sim MR. Cohort Profile: Health Watch-a 30-year prospective cohort study of Australian petroleum industry workers. Int J Epidemiol 2015; 45:700-6. [PMID: 26157111 DOI: 10.1093/ije/dyv121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Deborah C Glass
- Monash University, Centre for Occupational and Environmental Health, Melbourne, VIC, Australia
| | - Elisa Wood
- Monash University, Centre for Occupational and Environmental Health, Melbourne, VIC, Australia
| | - Anthony Del Monaco
- Monash University, Centre for Occupational and Environmental Health, Melbourne, VIC, Australia
| | - Malcolm R Sim
- Monash University, Centre for Occupational and Environmental Health, Melbourne, VIC, Australia
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97
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Linet MS, Yin SN, Gilbert ES, Dores GM, Hayes RB, Vermeulen R, Tian HY, Lan Q, Portengen L, Ji BT, Li GL, Rothman N. A retrospective cohort study of cause-specific mortality and incidence of hematopoietic malignancies in Chinese benzene-exposed workers. Int J Cancer 2015; 137:2184-97. [PMID: 25944549 DOI: 10.1002/ijc.29591] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 02/19/2015] [Accepted: 02/23/2015] [Indexed: 12/31/2022]
Abstract
Benzene exposure has been causally linked with acute myeloid leukemia (AML), but inconsistently associated with other hematopoietic, lymphoproliferative and related disorders (HLD) or solid tumors in humans. Many neoplasms have been described in experimental animals exposed to benzene. We used Poisson regression to estimate adjusted relative risks (RR) and the likelihood ratio statistic to derive confidence intervals for cause-specific mortality and HLD incidence in 73,789 benzene-exposed compared with 34,504 unexposed workers in a retrospective cohort study in 12 cities in China. Follow-up and outcome assessment was based on factory, medical and other records. Benzene-exposed workers experienced increased risks for all-cause mortality (RR = 1.1, 95% CI = 1.1, 1.2) due to excesses of all neoplasms (RR = 1.3, 95% CI = 1.2, 1.4), respiratory diseases (RR = 1.7, 95% CI = 1.2, 2.3) and diseases of blood forming organs (RR = ∞, 95% CI = 3.4, ∞). Lung cancer mortality was significantly elevated (RR = 1.5, 95% CI = 1.2, 1.9) with similar RRs for males and females, based on three-fold more cases than in our previous follow-up. Significantly elevated incidence of all myeloid disorders reflected excesses of myelodysplastic syndrome/acute myeloid leukemia (RR = 2.7, 95% CI = 1.2, 6.6) and chronic myeloid leukemia (RR = 2.5, 95% CI = 0.8, 11), and increases of all lymphoid disorders included excesses of non-Hodgkin lymphoma (RR = 3.9, 95%CI = 1.5, 13) and all lymphoid leukemia (RR = 5.4, 95%CI = 1.0, 99). The 28-year follow-up of Chinese benzene-exposed workers demonstrated increased risks of a broad range of myeloid and lymphoid neoplasms, lung cancer, and respiratory diseases and suggested possible associations with other malignant and non-malignant disorders.
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Affiliation(s)
- Martha S Linet
- Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD
| | - Song-Nian Yin
- National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Ethel S Gilbert
- Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD
| | - Graça M Dores
- Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD
| | - Richard B Hayes
- Division of Epidemiology, Department of Population Health, New York University School of Medicine, New York, NY
| | - Roel Vermeulen
- Division of Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
| | - Hao-Yuan Tian
- National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Qing Lan
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD
| | - Lutzen Portengen
- Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
| | - Bu-Tian Ji
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD
| | - Gui-Lan Li
- National Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Nathaniel Rothman
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, DHHS, Rockville, MD
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98
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Effects of low concentrations of benzene exposure on levels of platelet-associated antibodies and platelet parameters. J Occup Environ Med 2015; 56:e92-7. [PMID: 25285841 DOI: 10.1097/jom.0000000000000288] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To evaluate the impact of exposure to low concentrations of benzene on the platelet-associated antibodies and platelet parameters. METHODS We carried out an analysis on 121 benzene-exposed workers and 110 healthy workers whose blood samples were collected and the levels of platelet-associated antibodies and platelet parameters were assessed. Benzene emissions were monitored over 5 years. RESULTS Large-platelet cell ratios (P-LCR), platelet distribution width (PDW), and mean platelet volume (MPV) were significantly higher in benzene-exposed participants than in control participants. In participants who smoke cigarettes or drank alcohol, P-LCR, PDW, and MPV were more significantly elevated in the benzene-exposed group than in nonsmokers and nondrinkers. Platelet-associated immunoglobulin (PAIg) levels in benzene-exposed participants were higher than those in the control group, and PAIgA and PAIgM levels correlated with cumulative benzene exposure. CONCLUSIONS Exposure to low concentrations of benzene can induce changes in PAIg levels and platelet parameters.
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99
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Stenehjem JS, Kjærheim K, Bråtveit M, Samuelsen SO, Barone-Adesi F, Rothman N, Lan Q, Grimsrud TK. Benzene exposure and risk of lymphohaematopoietic cancers in 25 000 offshore oil industry workers. Br J Cancer 2015; 112:1603-12. [PMID: 25867262 PMCID: PMC4453669 DOI: 10.1038/bjc.2015.108] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 02/20/2015] [Accepted: 02/24/2015] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND The aim of this work was to examine the risk of lymphohaematopoietic (LH) cancer according to benzene exposure among offshore workers. METHODS Cancer registry data were used to identify 112 cancer cases diagnosed during 1999-2011 in a cohort of 24 917 Norwegian men reporting offshore work between 1965 and 1999. Analyses were conducted according to a stratified case-cohort design with a reference subcohort of 1661 workers. Cox regression was used to estimate hazard ratios with 95% confidence intervals, adjusted for other benzene exposure and smoking. RESULTS Most workers were exposed to benzene for <15 years. The upper range values of average intensity and cumulative exposure were estimated to 0.040 p.p.m. and 0.948 p.p.m.-years, respectively. Risks were consistently elevated among exposed workers for all LH cancers combined and for most subgroups, although case numbers were small and yielded imprecise risk estimates. There was evidence of dose-related risk patterns according to cumulative exposure for acute myeloid leukaemia (AML), multiple myeloma (MM) (P trends 0.052 and 0.024, respectively), and suggestively so for chronic lymphocytic leukaemia (CLL) according to average intensity (P trend 0.094). CONCLUSIONS Our results support an association between cumulative and intensity metrics of low-level benzene exposure and risk for AML, MM, and suggestively for CLL.
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Affiliation(s)
- J S Stenehjem
- Department of Research, Cancer Registry of Norway, P.O. Box 5313 Majorstuen, Oslo N-0304, Norway
| | - K Kjærheim
- Department of Research, Cancer Registry of Norway, P.O. Box 5313 Majorstuen, Oslo N-0304, Norway
| | - M Bråtveit
- Department of Global Public Health and Primary Care, University of Bergen, Bergen N-5020, Norway
| | - S O Samuelsen
- Department of Mathematics, University of Oslo, Oslo N-0316, Norway
| | - F Barone-Adesi
- Population Health Research Institute, St George's University of London, London SW17 0RE, UK
- Department of Pharmaceutical Sciences, University of Eastern Piedmont, Novara 28100, Italy
| | - N Rothman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD 20892, USA
| | - Q Lan
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD 20892, USA
| | - T K Grimsrud
- Department of Research, Cancer Registry of Norway, P.O. Box 5313 Majorstuen, Oslo N-0304, Norway
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French JE, Gatti DM, Morgan DL, Kissling GE, Shockley KR, Knudsen GA, Shepard KG, Price HC, King D, Witt KL, Pedersen LC, Munger SC, Svenson KL, Churchill GA. Diversity Outbred Mice Identify Population-Based Exposure Thresholds and Genetic Factors that Influence Benzene-Induced Genotoxicity. ENVIRONMENTAL HEALTH PERSPECTIVES 2015; 123:237-45. [PMID: 25376053 PMCID: PMC4348743 DOI: 10.1289/ehp.1408202] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 10/31/2014] [Indexed: 05/20/2023]
Abstract
BACKGROUND Inhalation of benzene at levels below the current exposure limit values leads to hematotoxicity in occupationally exposed workers. OBJECTIVE We sought to evaluate Diversity Outbred (DO) mice as a tool for exposure threshold assessment and to identify genetic factors that influence benzene-induced genotoxicity. METHODS We exposed male DO mice to benzene (0, 1, 10, or 100 ppm; 75 mice/exposure group) via inhalation for 28 days (6 hr/day for 5 days/week). The study was repeated using two independent cohorts of 300 animals each. We measured micronuclei frequency in reticulocytes from peripheral blood and bone marrow and applied benchmark concentration modeling to estimate exposure thresholds. We genotyped the mice and performed linkage analysis. RESULTS We observed a dose-dependent increase in benzene-induced chromosomal damage and estimated a benchmark concentration limit of 0.205 ppm benzene using DO mice. This estimate is an order of magnitude below the value estimated using B6C3F1 mice. We identified a locus on Chr 10 (31.87 Mb) that contained a pair of overexpressed sulfotransferases that were inversely correlated with genotoxicity. CONCLUSIONS The genetically diverse DO mice provided a reproducible response to benzene exposure. The DO mice display interindividual variation in toxicity response and, as such, may more accurately reflect the range of response that is observed in human populations. Studies using DO mice can localize genetic associations with high precision. The identification of sulfotransferases as candidate genes suggests that DO mice may provide additional insight into benzene-induced genotoxicity.
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Affiliation(s)
- John E French
- Division of the National Toxicology Program, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health (NIH), Department of Health and Human Resources (DHHS), Research Triangle Park, North Carolina, USA
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