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Koutros S, Graubard B, Bassig BA, Vermeulen R, Appel N, Hyer M, Stewart PA, Silverman DT. Diesel Exhaust Exposure and Cause-Specific Mortality in the Diesel Exhaust in Miners Study II (DEMS II) Cohort. ENVIRONMENTAL HEALTH PERSPECTIVES 2023; 131:87003. [PMID: 37549097 PMCID: PMC10406173 DOI: 10.1289/ehp12840] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 06/26/2023] [Accepted: 06/26/2023] [Indexed: 08/09/2023]
Abstract
BACKGROUND With the exception of lung cancer, the health effects associated with diesel exhaust for other cancers and nonmalignant health outcomes are not well understood. OBJECTIVES We extended the mortality follow-up of the Diesel Exhaust in Miners Study, a cohort study of 12,315 workers, by 18 y (ending 31 December 2015), more than doubling the number of observed deaths to n = 4,887 , to evaluate associations between mortality and diesel exhaust exposure. METHODS Quantitative estimates of historical exposure to respirable elemental carbon (REC), a surrogate for diesel exhaust, were created for all jobs, by year and facility, using measurements collected from each mine, as well as historical measurements. Standardized mortality ratios (SMRs) and hazard ratios (HRs) were estimated for the entire cohort and by worker location (surface, underground). RESULTS We observed an excess of death for cancers of the lung, trachea, and bronchus (n = 409 ; SMR = 1.24 ; 95% CI: 1.13, 1.37). Among workers who ever worked underground, where the majority of diesel exposure occurred, excess deaths were evident for lung, trachea, and bronchus cancers (n = 266 ; SMR = 1.26 ; 95% CI: 1.11, 1.42). Several nonmalignant diseases were associated with excess mortality among workers ever-employed underground, including ischemic heart disease (SMR = 1.08 ; 95% CI: 1.00, 1.16), cerebrovascular disease (SMR = 1.22 ; 95% CI: 1.04, 1.43), and nonmalignant diseases of the respiratory system (SMR = 1.13 ; 95% CI: 1.01, 1.26). Continuous 15-y lagged cumulative REC exposure < 1,280 μ g / m 3 -y was associated with increased lung cancer risk (HR = 1.93 ; 95% CI: 1.24, 3.03), but the risk declined at the highest exposures (HR = 1.29 ; 95% CI: 0.74, 2.26). We also observed a significant trend in non-Hodgkin lymphoma (NHL) risk with increasing 20-y lagged cumulative REC (HR Tertile 3 vs. Tertile 1 = 3.12 ; 95% CI: 1.00, 9.79; p -trend = 0.031 ). DISCUSSION Increased risks of lung cancer mortality observed in the original study were sustained. Observed associations between diesel exposure and risk of death from NHL and the excesses in deaths for diseases of the respiratory and cardiovascular system, including ischemic heart disease and cerebrovascular disease, warrant further study and provide evidence of the potential widespread public health impact of diesel exposure. https://doi.org/10.1289/EHP12840.
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Affiliation(s)
- Stella Koutros
- 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
| | - Barry Graubard
- Biostatistics Branch, Division of Cancer Epidemiology and Genetics, NCI, NIH, DHHS, Bethesda, Maryland, USA
| | - Bryan A. Bassig
- Formerly Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, NCI, NIH, DHHS, Bethesda, Maryland, USA
| | - Roel Vermeulen
- Institute for Risk Assessment Sciences, Division of Environmental Epidemiology, Utrecht University, Utrecht, the Netherlands
| | - Nathan Appel
- Information Management Services, Inc. Rockville, Maryland, USA
| | - Marianne Hyer
- Information Management Services, Inc. Rockville, Maryland, USA
| | | | - Debra T. Silverman
- 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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Hansa J, Merzenich H, Cascant Ortolano L, Klug SJ, Blettner M, Gianicolo E. Health risks of titanium dioxide (TiO 2) dust exposure in occupational settings - A scoping review. Int J Hyg Environ Health 2023; 252:114212. [PMID: 37392523 DOI: 10.1016/j.ijheh.2023.114212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 05/30/2023] [Accepted: 06/16/2023] [Indexed: 07/03/2023]
Abstract
Titanium dioxide (TiO2) is an inorganic compound with many applications, for example in paint, sunscreen or as food coloring. There have been concerns regarding its safety and according to IARC, the existing evidence is not substantial enough to rule them out, leading to the substance being classified as possibly carcinogenic to humans (2B). This work aims to provide a comprehensible overview about epidemiological studies on occupational health risks and methodological aspects. A literature search was conducted in two databases (MEDLINE and Web of Science). The search focused on occupational exposure since this setting provides the highest amounts of TiO2 exposure. Of 443 unique search results, ten were included in this study, with publication dates ranging from 1988 to 2022. Seven of them are retrospective cohort studies and three have a case-control study design. Main outcomes of most studies were all-cause mortality and lung cancer mortality. For all-cause mortality, most cohort studies reported no association with TiO2 exposure. For lung cancer mortality, a significantly increased risk was found in a study population from Europe. The analysis results of working cohorts from the US comparing exposed workers' mortality rates with those of the general population were unobtrusive. However, one US cohort found an elevated mortality risk for all causes and lung cancer based on a reference population of company workers unexposed to TiO2. Case-control studies did not indicate an increased risk for cancer related to TiO2. Recent publications partly questioned the validity of those earlier findings, claiming insufficient confounder analysis, most notably for smoking, as well as the presence of the healthy worker effect, masking a potential health risk. In conclusion, the associations between occupational TiO2 exposure and mortality are unclear, but concerns regarding possible health risks recently re-emerged based on new analytical approaches, highlighting methodological difficulties that could have limited the inferential value of previously conducted studies.
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Affiliation(s)
- Jannis Hansa
- Institute for Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center of the Johannes Gutenberg University, Rhabanusstr. 3, Turm A, 55118, Mainz, Germany.
| | - Hiltrud Merzenich
- Institute for Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center of the Johannes Gutenberg University, Rhabanusstr. 3, Turm A, 55118, Mainz, Germany.
| | - Lorena Cascant Ortolano
- Departmental Library for the University Medical Center, Johannes Gutenberg University, Langenbeckstr. 1, 55131, Mainz, Germany.
| | - Stefanie J Klug
- Chair of Epidemiology, Department of Sport and Health Sciences, Technische Universität München, Georg-Brauchle-Ring 56, 80992, Munich, Germany.
| | - Maria Blettner
- Institute for Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center of the Johannes Gutenberg University, Rhabanusstr. 3, Turm A, 55118, Mainz, Germany.
| | - Emilio Gianicolo
- Institute for Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center of the Johannes Gutenberg University, Rhabanusstr. 3, Turm A, 55118, Mainz, Germany; Institute of Clinical Physiology, National Research Council, Lecce, Italy.
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Mehrnoush V, Keramati S, Ismail A, Shabana W, Zakaria A, Elmansy H, Shahrour W, Prowse O, Kotb A. Adverse pathological outcomes of patients with de novo muscle invasive bladder cancer in Northern Ontario. Arch Ital Urol Androl 2022; 94:41-45. [PMID: 35352519 DOI: 10.4081/aiua.2022.1.41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 12/08/2021] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE This study aimed to investigate the clinical and pathological characteristics of patients with de novo muscle-invasive bladder cancer (MIBC) who underwent radical cystectomy in Northern Ontario. METHODS This is a retrospective cross-sectional study of patients with de novo T2 MIBC who underwent radical cystectomy over a 2-year-period in Thunder Bay Regional Health Sciences Centre. Clinical and pathological characteristics of Trans Urethral Resection of Bladder Tumors and cystectomy specimens were analyzed. RESULTS Of the 59 patients aged 67 ± 8.8 years, predominated by males (80%), 27.1% were younger than age 60. After surgery, upstaging was noted in 59.3% (T3 in 27.1% and T4 in 32.2%) while node positive was noted in 36% of patients. Prostate adenocarcinoma was incidentally discovered in 20 (34%) of patients with 50% considered significant (Gleason score ≥ 7). Downstaging was found in those who had neoadjuvant chemotherapy (p = 0.001). CONCLUSIONS The high prevalence of younger ages (less than 60), a high rate of upstaging, the presence of high-grade incidental prostate cancer, and lymph node positives in T2 de novo MIBC in Northern Ontario, warrants further investigation of potential causes and risk factors at individual, public, and population health levels in the region.
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Affiliation(s)
- Vahid Mehrnoush
- Urology Department, Northern Ontario School of Medicine, Thunder Bay Regional Health Centre, Ontario.
| | - Shahrzad Keramati
- Urology Department, Northern Ontario School of Medicine, Thunder Bay Regional Health Centre, Ontario.
| | - Asmaa Ismail
- Urology Department, Northern Ontario School of Medicine, Thunder Bay Regional Health Centre, Ontario.
| | - Waleed Shabana
- Urology Department, Northern Ontario School of Medicine, Thunder Bay Regional Health Centre, Ontario.
| | - Ahmed Zakaria
- Urology Department, Northern Ontario School of Medicine, Thunder Bay Regional Health Centre, Ontario.
| | - Hazem Elmansy
- Urology Department, Northern Ontario School of Medicine, Thunder Bay Regional Health Centre, Ontario.
| | - Walid Shahrour
- Urology Department, Northern Ontario School of Medicine, Thunder Bay Regional Health Centre, Ontario.
| | - Owen Prowse
- Urology Department, Northern Ontario School of Medicine, Thunder Bay Regional Health Centre, Ontario.
| | - Ahmed Kotb
- Urology Department, Northern Ontario School of Medicine, Thunder Bay Regional Health Centre, Ontario.
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Qi Y, Toyooka T, Nie J, Ohta H, Koda S, Wang RS. Comparative γ-H2AX analysis for assessment of the genotoxicity of six aromatic amines implicated in bladder cancer in human urothelial cell line. Toxicol In Vitro 2020; 66:104880. [PMID: 32387221 DOI: 10.1016/j.tiv.2020.104880] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 03/04/2020] [Accepted: 04/27/2020] [Indexed: 11/25/2022]
Abstract
Recently, it was reported that ten cases of bladder cancer occurred among employees, who handled several kinds of aromatic amines, at a Japanese chemical plant. The common aromatic amines were identified as ortho-toluidine, para-toluidine, aniline, ortho-chloroaniline, ortho-anisidine, and 2,4-dimethylaniline. All of these aromatic amines, except ortho-chloroaniline, have been found to be carcinogenic in animals and/or humans. Genotoxic events are known to be crucial steps in the initiation of cancer; information on the genotoxicity of these aromatic amines is insufficient and consistent results have not been obtained. In this study, we examined the genotoxicity of the six different aromatic amines associated with bladder cancer by assessing phosphorylated histone H2AX (γ-H2AX) in a cultured human urothelial cell line, 1T1. We showed that all six aromatic amines generated γ-H2AX. In addition, the γ-H2AX-inducing potential of these six aromatic amines was distinctly different; ortho-chloroaniline and 2,4-dimethylaniline showed particularly high potential, followed by ortho-toluidine, ortho-anisidine, para-toluidine ≒ aniline. The findings of this study may provide important information for the risk assessment of chemicals and for interpreting epidemiological studies on occupational bladder cancer.
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Affiliation(s)
- Yonggang Qi
- Department of Occupational Health, School of Public Health, Shanxi Medical University, Taiyuan, China; Industrial Toxicology and Health Effects Research Group, National Institute of Occupational Safety and Health, Kawasaki, Japan; Department of Environmental, Occupational Health and Toxicology, Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Tatsushi Toyooka
- Industrial Toxicology and Health Effects Research Group, National Institute of Occupational Safety and Health, Kawasaki, Japan.
| | - Jisheng Nie
- Department of Occupational Health, School of Public Health, Shanxi Medical University, Taiyuan, China
| | - Hisayoshi Ohta
- Department of Environmental, Occupational Health and Toxicology, Graduate School of Medical Sciences, Kitasato University, Sagamihara, Japan
| | - Shigeki Koda
- Industrial Toxicology and Health Effects Research Group, National Institute of Occupational Safety and Health, Kawasaki, Japan
| | - Rui-Sheng Wang
- Industrial Toxicology and Health Effects Research Group, National Institute of Occupational Safety and Health, Kawasaki, Japan
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Koutros S, Kogevinas M, Friesen MC, Stewart PA, Baris D, Karagas MR, Schwenn M, Johnson A, Monawar Hosain GM, Serra C, Tardon A, Carrato A, Garcia-Closas R, Moore LE, Nickerson ML, Hewitt SM, Lenz P, Schned AR, Lloreta J, Allory Y, Zhang H, Chatterjee N, Garcia-Closas M, Rothman N, Malats N, Silverman DT. Diesel exhaust and bladder cancer risk by pathologic stage and grade subtypes. ENVIRONMENT INTERNATIONAL 2020; 135:105346. [PMID: 31864026 PMCID: PMC8237313 DOI: 10.1016/j.envint.2019.105346] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 11/15/2019] [Accepted: 11/18/2019] [Indexed: 05/29/2023]
Abstract
BACKGROUND The International Agency for Research on Cancer (IARC) classifies diesel engine exhaust as carcinogenic to humans based on sufficient evidence for lung cancer. IARC noted, however, an increased risk of bladder cancer (based on limited evidence). OBJECTIVE To evaluate the association between quantitative, lifetime occupational diesel exhaust exposure and risk of urothelial cell carcinoma of the bladder (UBC) overall and according to pathological subtypes. METHODS Data from personal interviews with 1944 UBC cases, as well as formalin-fixed paraffin-embedded tumor tissue blocks, and 2135 controls were pooled from two case-control studies conducted in the U.S. and Spain. Lifetime occupational histories combined with exposure-oriented questions were used to estimate cumulative exposure to respirable elemental carbon (REC), a primary surrogate for diesel exhaust. Unconditional logistic regression and two-stage polytomous logistic regression were used to calculate odds ratios (ORs) and 95% confidence intervals (CIs), adjusting for smoking and other risk factors. RESULTS Exposure to cumulative REC was associated with an increased risk of UBC; workers with cumulative REC >396 μg/m3-years had an OR of 1.61 (95% CI, 1.08-2.40). At this level of cumulative exposure, similar results were observed in the U.S. and Spain, OR = 1.75 (95% CI, 0.97-3.15) and OR = 1.54 (95% CI, 0.89-2.68), respectively. In lagged analysis, we also observed a consistent increased risk among workers with cumulative REC >396 μg/m3-years (range of ORs = 1.52-1.93) for all lag intervals evaluated (5-40 years). When we accounted for tumor subtypes defined by stage and grade, a significant association between diesel exhaust exposure and UBC was apparent (global test for association p = 0.0019). CONCLUSIONS Combining data from two large epidemiologic studies, our results provide further evidence that diesel exhaust exposure increases the risk of UBC.
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Affiliation(s)
- Stella Koutros
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA.
| | - Manolis Kogevinas
- ISGlobal, Barcelona, Spain; CIBER Epidemiologia y Salud Pública (CIBERESP), Madrid, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain
| | - Melissa C Friesen
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | | | - Dalsu Baris
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Margaret R Karagas
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
| | | | | | - G M Monawar Hosain
- Bureau of Public Health Statistics and Informatics, Department of Health and Human Services, Concord, NH, USA
| | - Consol Serra
- Center for Research in Occupational Health (CiSAL), Universitat Pompeu Fabra, IMIM-Hospital del Mar Medical Research Institut, Barcelona, CIBERESP, Spain
| | - Adonina Tardon
- Department of Preventive Medicine, Universidad de Oviedo, CIBERESP, Spain
| | - Alfredo Carrato
- Medical Oncology Department, Ramón y Cajal University Hospital, Alcalá University, IRYCIS, CIBERONC, Madrid, Spain
| | | | - Lee E Moore
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Michael L Nickerson
- Laboratory of Translational Genomics, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Stephen M Hewitt
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Petra Lenz
- Clinical Research Directorate/Clinical Monitoring Research Program, Leidos Biomedical Research Inc., Frederick National Laboratory of Cancer Research, Frederick, MD, USA
| | - Alan R Schned
- Department of Pathology, Dartmouth Medical School, Hanover, NH, USA
| | - Josep Lloreta
- Department of Pathology, Hospital del Mar, Barcelona, Spain; Department of Health and Experimental Sciences, Universitat Pompeu Fabra, Barcelona, Spain
| | - Yves Allory
- Pathology Department, Institut Curie, Saint Cloud, France; Pathology Department, Hospital Foch, Suresnes, France
| | - Haoyu Zhang
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Nilanjan Chatterjee
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Montserrat Garcia-Closas
- Office of the Director, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Nathaniel Rothman
- Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, MD, USA
| | - Núria Malats
- Genetic and Molecular Epidemiology Group, Spanish National Cancer Research Centre (CNIO), Madrid, CIBERONC, Spain
| | - Debra T Silverman
- Occupational and Environmental Epidemiology Branch, 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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Nguyen SM, Deppen S, Nguyen GH, Pham DX, Bui TD, Tran TV. Projecting Cancer Incidence for 2025 in the 2 Largest Populated Cities in Vietnam. Cancer Control 2020; 26:1073274819865274. [PMID: 31331188 PMCID: PMC6651684 DOI: 10.1177/1073274819865274] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The population size and projected demographics of Vietnam's 2 largest cities, Ho Chi Minh City (HCMC) and Hanoi, will change dramatically over the next decade. Demographic changes in an aging population coupled with income growth and changes in lifestyle will result in a very different distribution of common cancers in the future. The study aimed to project the number of cancer incidence in the 2 largest populated cities in Vietnam for the year 2025. Cancer incidence data from 2004 to 2013 collected from population-based cancer registries in these 2 cities were provided by Vietnam National Cancer Institute. Incidence cases in 2013 and the previous decades average annual percent changes of age-standardized cancer incidence rates combined with expected population growth were modeled to project cancer incidence for each cancer site by gender to 2025. A substantial double in cancer incidence from 2013 to 2025 resulted from a growing and aging population in HCMC and Hanoi. Lung, colorectum, breast, thyroid, and liver cancers, which represent 67% of the overall cancer burden, are projected to become the leading cancer diagnoses by 2025 regardless of genders. For men, the leading cancer sites in 2025 are predicted to be lung, colorectum, esophagus, liver, and pharynx cancer, and among women, they are expected to be breast, thyroid, colorectum, lung, and cervical cancer. We projected an epidemiological transition from infectious-associated cancers to a high burden of cancers that have mainly been attributed to lifestyle in both cities. We predicted that with 16.9% growth in the overall population and dramatic aging with these 2 urban centers, the burdens of cancer incidence will increase sharply in both cities over the next decades. Data on projections of cancer incidence in both cities provide useful insights for directing appropriate policies and cancer control programs in Vietnam.
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Affiliation(s)
- Sang Minh Nguyen
- 1 Division of Epidemiology, Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Stephen Deppen
- 2 Geriatric Research Education and Clinical Center, Tennessee Valley Healthcare System, Nashville, TN, USA.,3 Department of Thoracic Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | | | - Dung Xuan Pham
- 5 Ho Chi Minh City Oncological Hospital, Ho Chi Minh City, Vietnam
| | - Tung Duc Bui
- 6 Ho Chi Minh Cancer Registry, Ho Chi Minh City Oncological Hospital, Ho Chi Minh City, Vietnam
| | - Thuan Van Tran
- 5 Ho Chi Minh City Oncological Hospital, Ho Chi Minh City, Vietnam.,7 Vietnam National Cancer Institute, Hanoi, Vietnam
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Wojtczyk-Miaskowska A, Schlichtholz B. Tobacco carcinogens and the methionine metabolism in human bladder cancer. MUTATION RESEARCH. REVIEWS IN MUTATION RESEARCH 2019; 782:108281. [PMID: 31843138 DOI: 10.1016/j.mrrev.2019.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 04/29/2019] [Accepted: 06/03/2019] [Indexed: 01/08/2023]
Abstract
Cigarette smoking is a strong risk factor for bladder cancer. It has been shown that the duration of smoking is associated with a poor prognosis and a higher risk of recurrence. This is due to tobacco carcinogens forming adducts with DNA and proteins that participate in the DNA repair mechanisms. Additionally, polymorphisms of genes responsible for methyl group transfer in the methionine cycle and dosages of vitamins (from diet and supplements) can cause an increased risk of bladder cancer. Upregulated DNA methyltransferase 1 expression and activity results in a high level of methylated products of metabolism, as well as hypermethylation of tumor suppressor genes. The development of a market that provides new inhibitors of DNA methyltransferase or alternatives for current smokers is essential not only for patients but also for people who are under the danger of secondhand smoking and can experience its long-term exposure consequences.
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Affiliation(s)
- A Wojtczyk-Miaskowska
- Department of Biochemistry, Medical University of Gdansk, Debinki 1, 80-211 Gdansk, Poland.
| | - B Schlichtholz
- Department of Biochemistry, Medical University of Gdansk, Debinki 1, 80-211 Gdansk, Poland
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Availability of a New Job-Exposure Matrix (CANJEM) for Epidemiologic and Occupational Medicine Purposes. J Occup Environ Med 2018; 60:e324-e328. [DOI: 10.1097/jom.0000000000001335] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Isermann J, Prager HM, Ebbinghaus R, Janasik B, Wasowicz W, Dufaux B, Meyer HF, Widera A, Selinski S, Hengstler JG, Golka K. Urinary cadmium levels in active and retired coal miners. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 80:405-410. [PMID: 28696835 DOI: 10.1080/10937404.2017.1304710] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A meta-analysis, based upon 24 publications, showed a significantly elevated risk for urinary bladder cancer amongst miners. In European underground hard coal mining areas, an increased risk for urinary bladder cancer development was noted among hard coal miners, in particular in three investigations in the greater Dortmund area. However, the cause remains unclear. As cadmium (Cd), which was reported to be a bladder carcinogen in humans and is a constituent of coal, the aim of this study was to determine urinary Cd levels in active and retired hard coal miners and assess whether hard coal miners demonstrated elevated metal levels. In total, 103 retired and 25 active hard coal miners as well as 18 controls without any history of hard coal mining were investigated for urinary Cd levels. Urinary Cd concentrations, in addition to other elements, were analyzed in spot urines by ICP-MS-based multi-element analysis in a Department for Forensic and Clinical Toxicology. Limit of detection (LOD) for Cd was 0.5 μg/L. Reference value for occupationally non-exposed working age population was 0.8 μg/L. In total, 49% of all underground coal miners were exposed to coal dust, 12% to grinded rock, and 39% to both. Urinary Cd levels in retired as well as active coal miners and controls were clearly below the Biological Exposure Index. Urinary Cd concentration is a suitable biomarker to evaluate the metallic load of the body, as the half-life is > than 10 years. The detected urinary Cd levels in retired and active coal miners indicated underground hard coal miners were not apparently exposed to Cd to a occupationally-relevant concentration.
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Affiliation(s)
- Julia Isermann
- a Institute for Occupational, Social and Environmental Medicine , Castrop-Rauxel , Germany
| | - Hans-Martin Prager
- a Institute for Occupational, Social and Environmental Medicine , Castrop-Rauxel , Germany
| | - Rainer Ebbinghaus
- a Institute for Occupational, Social and Environmental Medicine , Castrop-Rauxel , Germany
| | - Beata Janasik
- b Department of Environmental and Biological Monitoring, Nofer Institute of Occupational Medicine , Lodz , Poland
| | - Wojciech Wasowicz
- b Department of Environmental and Biological Monitoring, Nofer Institute of Occupational Medicine , Lodz , Poland
| | - Bertinus Dufaux
- c Department of Forensic and Clinical Toxicology , Bad Salzuflen , Germany
| | | | - Agata Widera
- e Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo) , Dortmund , Germany
| | - Silvia Selinski
- e Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo) , Dortmund , Germany
| | - Jan G Hengstler
- e Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo) , Dortmund , Germany
| | - Klaus Golka
- e Leibniz Research Centre for Working Environment and Human Factors at TU Dortmund (IfADo) , Dortmund , Germany
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Möhner M, Wendt A. A critical review of the relationship between occupational exposure to diesel emissions and lung cancer risk. Crit Rev Toxicol 2017; 47:185-224. [PMID: 28322628 DOI: 10.1080/10408444.2016.1266598] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In 2012, a working group of the International Agency for Research on Cancer classified diesel exhaust (DE) as a human carcinogen (Group 1). This decision was primarily based on the findings of the Diesel Exhaust in Miners Study (DEMS). The disparity between the results of various methodological approaches applied to the DEMS led to several critical commentaries. An expert panel was subsequently set up by the Health Effects Institute to evaluate the DEMS results, together with a large study in the trucking industry. The panel concluded that both studies provided a useful basis for quantitative risk assessments (QRAs) of DE exposure. However, the results of both studies were non-definitive as the studies suffer from several methodological shortcomings. We conducted a critical review of the studies used by the International Agency for Research on Cancer (IARC) working group to evaluate the relationship between DE and lung cancer. The aim was to assess whether the available studies support the statement of a causal relationship and, secondarily if they could be used for QRA. Our review highlights several methodological flaws in the studies, amongst them overadjustment bias, selection bias, and confounding bias. The conclusion from our review is that the currently published studies provide little evidence for a definite causal link between DE exposure and lung cancer risk. Based on two studies in miners, the DEMS and the German Potash Miners study, QRA may be conducted. However, the DEMS data should be reanalyzed in advance to avoid bias that affects the presently published risk estimates.
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Affiliation(s)
- Matthias Möhner
- a Division Work and Health , Federal Institute for Occupational Safety and Health , Berlin , Germany
| | - Andrea Wendt
- a Division Work and Health , Federal Institute for Occupational Safety and Health , Berlin , Germany
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Hadkhale K, Martinsen JI, Weiderpass E, Kjaerheim K, Sparen P, Tryggvadottir L, Lynge E, Pukkala E. Occupational exposure to solvents and bladder cancer: A population‐based case control study in Nordic countries. Int J Cancer 2017; 140:1736-1746. [DOI: 10.1002/ijc.30593] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 12/14/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Kishor Hadkhale
- Department of EpidemiologyUniversity of TampereTampere Finland
| | - Jan Ivar Martinsen
- Cancer Registry of Norway, Department of Research, Institute of Population‐Based Cancer ResearchOslo Norway
| | - Elisabete Weiderpass
- Cancer Registry of Norway, Department of Research, Institute of Population‐Based Cancer ResearchOslo Norway
- Department of Community Medicine, Faculty of Health SciencesUniversity of Tromsø, The Arctic University of NorwayTromsø Norway
- Genetic Epidemiology Group, Folkhälsan Research CenterHelsinki Finland
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholm Sweden
| | - Kristina Kjaerheim
- Cancer Registry of Norway, Department of Research, Institute of Population‐Based Cancer ResearchOslo Norway
| | - Pär Sparen
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholm Sweden
| | - Laufey Tryggvadottir
- Icelandic Cancer RegistryReykjavik Iceland
- Faculty of MedicineUniversity of IcelandReykjavik Iceland
| | - Elsebeth Lynge
- Center for Epidemiology and Screening, Institute of Public Health, University of CopenhagenCopenhagen Denmark
| | - Eero Pukkala
- Department of EpidemiologyUniversity of TampereTampere Finland
- Finnish Cancer Registry, Institute for Statistical and Epidemiological Cancer ResearchHelsinki Finland
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López-Herranz A, Cutanda F, Esteban M, Pollán M, Calvo E, Pérez-Gómez B, Victoria Cortes M, Castaño A. Cadmium levels in a representative sample of the Spanish adult population: The BIOAMBIENT.ES project. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2016; 26:471-480. [PMID: 25899448 DOI: 10.1038/jes.2015.25] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 01/23/2015] [Accepted: 02/03/2015] [Indexed: 06/04/2023]
Abstract
Urinary cadmium levels (U-Cd) were measured in 1770 adults (aged 18-65 years) as a representative sample of the Spanish workforce. The geometric mean (GM) was 0.28 μg/l with 95% CI: 0.27-0.32 μg/l (GM: 0.20 μg/g 95% CI: 0.18-022 μg/g creatinine). The 95% percentile was 1.03 μg/l. U-Cd increased with age, with women showing higher U-Cd than men (p<0.001; 0.24 μg/g vs 0.17 μg/g). A multivariate analysis confirmed that sex, age and smoking habit significantly influence U-Cd. Smoking habit increases U-Cd by ∼90% per 10 years of age, almost twice the increase observed for non-smoking. Female smokers had 85% higher U-Cd than non-smokers, whereas the corresponding value for male smokers and non-smokers was 45%. No regional differences were observed with respect to the national reference level. The Spanish population studied here exhibits similar urinary cadmium levels to its European counterparts in Germany and slightly lower levels than in France, the Czech Republic, Italy and the United Kingdom. This paper provides the first baseline information concerning cadmium exposure in the Spanish adult population on a national scale. As such, these findings will help us to establish reference levels, follow temporal trends and identify high-exposure groups, thereby enabling comparisons with other countries and contributing to the improvement of public health and environmental quality.
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Affiliation(s)
- Ana López-Herranz
- Environmental Toxicology, National Centre for Environmental Health (CNSA), Instituto de Salud Carlos III, Madrid, Spain
| | - Francisco Cutanda
- Environmental Toxicology, National Centre for Environmental Health (CNSA), Instituto de Salud Carlos III, Madrid, Spain
| | - Marta Esteban
- Environmental Toxicology, National Centre for Environmental Health (CNSA), Instituto de Salud Carlos III, Madrid, Spain
| | - Marina Pollán
- National Centre for Epidemiology, Instituto de Salud Carlos III, Madrid, Spain
| | - Eva Calvo
- Ibermutuamur, Ramirez de Arellano 4, Madrid, Spain
| | - Beatriz Pérez-Gómez
- National Centre for Epidemiology, Instituto de Salud Carlos III, Madrid, Spain
| | | | - Argelia Castaño
- Environmental Toxicology, National Centre for Environmental Health (CNSA), Instituto de Salud Carlos III, Madrid, Spain
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13
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Sandquist EJ, Somji S, Dunlevy JR, Garrett SH, Zhou XD, Slusser-Nore A, Sens DA. Loss of N-Cadherin Expression in Tumor Transplants Produced From As+3- and Cd+2-Transformed Human Urothelial (UROtsa) Cell Lines. PLoS One 2016; 11:e0156310. [PMID: 27224422 PMCID: PMC4880289 DOI: 10.1371/journal.pone.0156310] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 05/12/2016] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Epithelial to mesenchymal transition is a process in which a cell experiences a loss of epithelial cell characteristics and acquires a more mesenchymal cell phenotype. In cancer, epithelial to mesenchymal transition has been proposed to play an important role during specific stages of tumor progression. The role epithelial to mesenchymal transition and mesenchymal to epithelial transition might play in toxicant-induced urothelial cancer is unknown. METHODS Real-time PCR, Western blotting, immuno-histochemistry and immuno-fluorescence were used to determine the expression of E- and N-cadherin in the UROtsa parent, the As+3- and Cd+2-transformed cell lines, the spheroids isolated from these cell lines as well as the tumor heterotransplants that were produced by the injection of the transformed cells into immune compromised mice. RESULTS This study showed that N-cadherin expression was increased in 6 As+3- and 7 Cd+2- transformed cell lines generated from human urothelial cells (UROtsa). The expression varied within each cell line, with 10% to 95% of the cells expressing N-cadherin. Tumors produced from these cell lines showed no expression of the N-cadherin protein. Spheroids which are made up of putative cancer initiating cells produced from these cell lines showed only background expression of N-cadherin mRNA, increased expression of aldehyde dehydrogenase 1 mRNA and produced tumors which did not express N-cadherin. There was no change in the expression of E-cadherin in the tumors, and the tumors formed by all the As+3 and Cd+2-transformed cell lines and cancer initiating cells stained intensely and uniformly for E-cadherin. CONCLUSIONS The finding that the cells expressing N-cadherin gave rise to tumors with no expression of N-cadherin is in agreement with the classical view of epithelial to mesenchymal transition. Epithelial to mesenchymal transition and N-cadherin are associated with dissemination and not with the ability to establish new tumor growth. Mesenchymal to epithelial transition and E-cadherin are viewed as necessary for a cell to establish a new metastatic site. The lack of N-cadherin expression in tumor transplants is consistent with E-cadherin expressing cells "seeding" a site for tumor growth. The study shows that a minority population of cultured cells can be the initiators of tumor growth.
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Affiliation(s)
- Elizabeth J. Sandquist
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota, United States of America
| | - Seema Somji
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota, United States of America
| | - Jane R. Dunlevy
- Department of Basic Sciences, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota, United States of America
| | - Scott H. Garrett
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota, United States of America
| | - Xu Dong Zhou
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota, United States of America
| | - Andrea Slusser-Nore
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota, United States of America
| | - Donald A. Sens
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota, United States of America
- * E-mail:
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14
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Clin B, Pairon JC. Medical follow-up for workers exposed to bladder carcinogens: the French evidence-based and pragmatic statement. BMC Public Health 2014; 14:1155. [PMID: 25377503 PMCID: PMC4230399 DOI: 10.1186/1471-2458-14-1155] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Accepted: 10/17/2014] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND The aim of this work was to establish recommendations for the medical follow-up of workers currently or previously exposed to carcinogenic substances for the bladder. METHODS A critical synthesis of the literature was conducted. Sectors of activity where workers are or were exposed to carcinogenic substances for the bladder were listed and classified according to the level of bladder cancer risk. Performances of techniques available for the targeted screening of bladder cancer were analysed, including a simulation of results among high-risk populations in France. RESULTS The risk level for the professional group and the latency period between the start of exposure and the natural history of the disease were selected to define a targeted screening protocol. The NMP22BC test, exclusive haematuria testing, and combinations of urine cytology with, respectively, the NMP22BC test and haematuria test, generated an extremely high proportion of false positive results. CONCLUSION Urine cytology is the test that offers the best specificity. Although poor for all bladder cancer stages and grades combined, its sensitivity is better for high grades, which require early diagnosis since late-stage cancers are of very poor prognosis. These results suggest that urine cytology is currently the only technique suitable for proposal within the context of a first line targeted screening strategy for occupational bladder cancer. An algorithm summarising the recommended medical follow-up for workers currently or previously exposed to carcinogenic substances for the bladder is proposed, based on the level of risk of bladder cancer.
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Affiliation(s)
- Bénédicte Clin
- />Cancers and prevention, U1086 INSERM, Faculty of Medicine, Caen University Hospital, Caen, France
- />Service de Santé au Travail et Pathologie Professionnelle (Occupational Health Department), C.H.U. (University Hospital) Côte de Nacre, 14033 CAEN Cedex, France
| | - “RecoCancerProf” Working Group
- />Cancers and prevention, U1086 INSERM, Faculty of Medicine, Caen University Hospital, Caen, France
- />Service de Santé au Travail et Pathologie Professionnelle (Occupational Health Department), C.H.U. (University Hospital) Côte de Nacre, 14033 CAEN Cedex, France
- />INSERM, Unité 955, Université Paris-Est Créteil, 94000 Créteil, France
- />Centre Hospitalier Intercommunal de Créteil, Service de Pneumologie et de Pathologie Professionnelle, 94000 Créteil, France
| | - Jean-Claude Pairon
- />INSERM, Unité 955, Université Paris-Est Créteil, 94000 Créteil, France
- />Centre Hospitalier Intercommunal de Créteil, Service de Pneumologie et de Pathologie Professionnelle, 94000 Créteil, France
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15
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Feki-Tounsi M, Hamza-Chaffai A. Cadmium as a possible cause of bladder cancer: a review of accumulated evidence. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:10561-73. [PMID: 24894749 DOI: 10.1007/s11356-014-2970-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 04/23/2014] [Indexed: 05/16/2023]
Abstract
Bladder cancer is a significant disease, the rates of which have increased over the few last years. However, its etiology remains as yet undefined. Cadmium, a widespread environmental carcinogen that has received considerable interest, presents evidence as a possible cause of bladder cancer. A literature review was conducted from the years 1984-2013 to study the accumulated evidence for cadmium as a possible cause of bladder cancer, including routes of cadmium exposure, accumulation, toxicity, carcinogenicity, and evidence from epidemiological and experimental studies. Special reference is devoted to cadmium nephrotoxicity, which illustrates how cadmium exerts its effects on the transitional epithelium of the urinary tract. Mechanisms of carcinogenesis are discussed. The effects of cadmium on gene expression in urothelial cells exposed to cadmium are also addressed. Despite different methodologies, several epidemiologic and nephrotoxicity studies of cadmium indicate that occupational exposure to cadmium is associated with increased risk of bladder cancer and provide additional evidence that cadmium is a potential toxic element in urothelial cells. In vitro studies provide further evidence that cadmium is involved in urothelial carcinogenesis. Animal studies encounter several problems such as morphology differences between species. Among the complex mechanisms of cadmium carcinogenesis, gene expression deregulation is the subject of recent studies on bladder cadmium-induced carcinogenesis. Further research, however, will be required to promise a better understanding of the mechanisms underlying cadmium carcinogenesis and to establish the precise role of cadmium in this important malignancy.
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Affiliation(s)
- Molka Feki-Tounsi
- Unit of Marine and Environmental Toxicology, IPEIS, Sfax University, PB 805, 3018, Sfax, Tunisia,
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16
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Ajjimaporn A, Botsford T, Garrett SH, Sens MA, Zhou XD, Dunlevy JR, Sens DA, Somji S. ZIP8 expression in human proximal tubule cells, human urothelial cells transformed by Cd+2 and As+3 and in specimens of normal human urothelium and urothelial cancer. Cancer Cell Int 2012; 12:16. [PMID: 22550998 PMCID: PMC3390278 DOI: 10.1186/1475-2867-12-16] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Accepted: 05/02/2012] [Indexed: 01/31/2023] Open
Abstract
Background ZIP8 functions endogenously as a Zn+2/HCO3- symporter that can also bring cadmium (Cd+2) into the cell. It has also been proposed that ZIP8 participates in Cd-induced testicular necrosis and renal disease. In this study real-time PCR, western analysis, immunostaining and fluorescent localization were used to define the expression of ZIP8 in human kidney, cultured human proximal tubule (HPT) cells, normal and malignant human urothelium and Cd+2 and arsenite (As+3) transformed urothelial cells. Results It was shown that in the renal system both the non-glycosylated and glycosylated form of ZIP8 was expressed in the proximal tubule cells with localization of ZIP8 to the cytoplasm and cell membrane; findings in line with previous studies on ZIP8. The studies in the bladder were the first to show that ZIP8 was expressed in normal urothelium and that ZIP8 could be localized to the paranuclear region. Studies in the UROtsa cell line confirmed a paranuclear localization of ZIP8, however addition of growth medium to the cells increased the expression of the protein in the UROtsa cells. In archival human samples of the normal urothelium, the expression of ZIP8 was variable in intensity whereas in urothelial cancers ZIP8 was expressed in 13 of 14 samples, with one high grade invasive urothelial cancer showing no expression. The expression of ZIP8 was similar in the Cd+2 and As+3 transformed UROtsa cell lines and their tumor transplants. Conclusion This is the first study which shows that ZIP8 is expressed in the normal urothelium and in bladder cancer. In addition the normal UROtsa cell line and its transformed counterparts show similar expression of ZIP8 compared to the normal urothelium and the urothelial cancers suggesting that the UROtsa cell line could serve as a model system to study the expression of ZIP8 in bladder disease.
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Affiliation(s)
- Amornpan Ajjimaporn
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND, USA.
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17
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Brown T, Slack R, Rushton L. Occupational cancer in Britain. Urinary tract cancers: bladder and kidney. Br J Cancer 2012; 107 Suppl 1:S76-84. [PMID: 22710682 PMCID: PMC3384013 DOI: 10.1038/bjc.2012.121] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Terry Brown
- Institute of Environment and Health, Cranfield Health, Cranfield University, Cranfield MK43 0AL, UK
| | - Rebecca Slack
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - Lesley Rushton
- Department of Epidemiology and Biostatistics, School of Public Health and MRC-HPA Centre for Environment and Health, Imperial College London, St Mary's Campus, Norfolk Place, London W2 3PG, UK
| | - with the British Occupational Cancer Burden Study Group
- Institute of Environment and Health, Cranfield Health, Cranfield University, Cranfield MK43 0AL, UK
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
- Department of Epidemiology and Biostatistics, School of Public Health and MRC-HPA Centre for Environment and Health, Imperial College London, St Mary's Campus, Norfolk Place, London W2 3PG, UK
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18
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Soh M, Dunlevy JR, Garrett SH, Allen C, Sens DA, Zhou XD, Sens MA, Somji S. Increased neuron specific enolase expression by urothelial cells exposed to or malignantly transformed by exposure to Cd²⁺ or As³⁺. Toxicol Lett 2012; 212:66-74. [PMID: 22613180 DOI: 10.1016/j.toxlet.2012.05.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2012] [Revised: 05/01/2012] [Accepted: 05/03/2012] [Indexed: 12/13/2022]
Abstract
Neuron specific enolase (ENO2, γ-enolase) is a biomarker used to help identify neuroendocrine differentiation in tumors. This laboratory has shown that ENO2 might be a biomarker for exposure to cadmium and arsenite. In this study these observations are extended to the urothelial cell, where environmental exposures are strongly linked to urothelial cancer. The UROtsa urothelial cell line and its Cd²⁺- and As³⁺-transformed counterparts were used as the model. Acute exposure of the UROtsa cells to both As³⁺- and Cd²⁺-caused significant increases in ENO2 expression. Treatment with the histone deacetlyase inhibitor was also shown to significantly increase the expression of ENO2 mRNA. The expression of ENO2 was significantly elevated in the Cd²⁺- and As³⁺-transformed UROtsa cells and tumor transplants. In contrast, ENO1, was unaffected by exposure to As³⁺ or Cd²⁺. Immunofluorescence showed ENO2 associated with both the nucleus and cytoplasm and cytoplasmic ENO2 co-localized with ENO1. The findings extend the evidence suggesting a link between As³⁺ and Cd²⁺ exposure and neuroendocrine differentiation in tumors. The results suggest that ENO2 might be a biomarker of human exposure to Cd²⁺ and As³⁺ that operates through histone modification.
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Affiliation(s)
- Maureen Soh
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USA.
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19
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Somji S, Cao L, Mehus A, Zhou XD, Sens MA, Dunlevy JR, Garrett SH, Zheng Y, Larson JL, Sens DA. Comparison of expression patterns of keratin 6, 7, 16, 17, and 19 within multiple independent isolates of As(+3)- and Cd (+2)-induced bladder cancer : keratin 6, 7, 16, 17, and 19 in bladder cancer. Cell Biol Toxicol 2011; 27:381-96. [PMID: 21927821 DOI: 10.1007/s10565-010-9169-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2010] [Accepted: 05/25/2010] [Indexed: 12/13/2022]
Abstract
This laboratory has generated a series of seven cadmium (Cd(+2))- and six arsenite (As(+3))-transformed urothelial cancer cell lines by exposure of parental UROtsa cells to each agent under similar conditions of exposure. In this study, the seven Cd(+2)-transformed cell lines were characterized for the expression of keratin 6, 16, and 17 while the six As(+3) cell lines were assessed for the expression of keratin 7 and 19. The results showed that the series of Cd(+2)-transformed cell lines and their respective transplants all had expression of keratin 6, 16, and 17 mRNA and protein. The expression of keratin 6, 16, and 17 was also correlated with areas of the urothelial tumor cells that had undergone squamous differentiation. The results also showed that four of the six As(+3)-transformed cell lines had expression of keratin 7 and 19 mRNA and protein and produced subcutaneous tumors with intense focal staining for keratin 7 and 19. The other two As(+3)-transformed cell lines had very low expression of keratin 7 mRNA and protein and produced subcutaneous tumors having no immunoreactivity for keratin 7; although keratin 19 expression was still present. The peritoneal tumors produced by one of these two cell lines regained expression of keratin 7 protein. The present results, coupled with previous studies, indicate that malignant transformation of UROtsa cells by Cd(+2) or As(+3) produce similar patterns of keratin 6, 7, 16, 17, and 19 in the resulting series of cell lines and their respective tumors.
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Affiliation(s)
- Seema Somji
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USA
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20
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Kindlin-2 expression in arsenite- and cadmium-transformed bladder cancer cell lines and in archival specimens of human bladder cancer. Urology 2011; 77:1507.e1-7. [PMID: 21624607 DOI: 10.1016/j.urology.2011.02.040] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 01/20/2011] [Accepted: 02/19/2011] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To confirm a microarray study that suggested that Kindlin-2 might play a role in the development and progression of bladder cancer. There has been no previous examination of Kindlin-2 expression in human bladder cancer. METHODS A combination of real-time polymerase chain reaction, Western analysis, and immunohistochemistry was used to characterize Kindlin-2 expression in arsenite (As(+3))- and cadmium (Cd(+2))-transformed human cell lines, their tumor transplants in immunocompromised mice, and in archival specimens of human bladder and bladder cancer. RESULTS The results show that the Kindlin-2 expression patterns in the cell lines were not duplicated in the tumor tissues. However, it was shown that Kindlin-2 was expressed in the stromal element of all the transplanted tumors and archival specimens of human bladder cancer. It was also shown that a small number of high-grade invasive urothelial cancers have focal expression of Kindlin-2 in the tumor cells. CONCLUSION Kindlin-2 is expressed in the stromal component of most, if not all, human bladder cancers. Kindlin-2 is not expressed in normal urothelium. Kindlin-2 is expressed in a small subset of high-grade invasive bladder cancers and may have potential as a prognostic marker for tumor progression.
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Abrahim KS, Abdel-Gawad NB, Mahmoud AM, El-Gowaily MM, Emara AM, Hwaihy MM. Genotoxic effect of occupational exposure to cadmium. Toxicol Ind Health 2010; 27:173-9. [PMID: 20870694 DOI: 10.1177/0748233710383743] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Many studies proved the genotoxic effect of cadmium (Cd) exposure and highlighted the importance of the cytogenetic studies as a sensitive and effective means for early detection of Cd-induced mutagenicity. The relationship between occupational exposure to Cd and increased risk of cancer, particularly lung cancer, has been explored in number of epidemiological studies. The aim of this study is to assess the role of chromosomal abnormalities and sister chromatid exchange as sensitive indicators for the genotoxicity of occupational exposure to Cd. Cytogenetic studies was done for 40 workers (27 smokers and 13 non-smokers) exposed to Cd dust and fumes with 40 control subjects (28 smokers and 12 non-smokers) not exposed to Cd before. Both exposed and control groups were similar in age and other sociodemographic factors. Clinical examination, laboratory investigation including urinary and blood Cd, cytogenic analysis for detection of chromosomal aberrations and sister chromatid exchange and environmental study of the work places were done. Statistical analysis of cytogenetic studies revealed the presence of significant elevation of chromosomal aberrations and sister chromatid exchanges of the exposed group. Urinary and blood Cd of the exposed group were significantly higher than that of the control group. These abnormalities were not significantly affected with age, duration of exposure, smoking habits, blood and urinary Cd. In conclusion, the study adds more proof that Cd exposure has a genotoxic effect and highlighted the importance of using cytogenetic studies as a sensitive and effective means for early detection of Cd-induced mutagenicity.
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Affiliation(s)
- Khadiga S Abrahim
- Environmental and Occupational Medicine Department, National Research Centre, Cairo, Egypt.
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Larson J, Yasmin T, Sens DA, Zhou XD, Sens MA, Garrett SH, Dunlevy JR, Cao L, Somji S. SPARC gene expression is repressed in human urothelial cells (UROtsa) exposed to or malignantly transformed by cadmium or arsenite. Toxicol Lett 2010; 199:166-72. [PMID: 20837119 DOI: 10.1016/j.toxlet.2010.08.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Revised: 08/30/2010] [Accepted: 08/31/2010] [Indexed: 01/10/2023]
Abstract
SPARC belongs to a class of extracellular matrix-associated proteins that have counteradhesive properties. The ability of SPARC to modulate cell-cell and cell-matrix interactions provides a strong rationale for studies designed to determine its expression in cancer. The objective of this study was to determine if SPARC expression was altered in cadmium (Cd(2+)) and arsenite (As(3+)) induced bladder cancer and if these alterations were present in archival specimens of human bladder cancer. The expression of SPARC was determined in human parental UROtsa cells, their Cd(2+) and As(3+) transformed counterparts and derived tumors, and in archival specimens of human bladder cancer using a combination of real time reverse transcriptase polymerase chain reaction, Western blotting, immunofluorescence localization and immunohistochemical staining. It was demonstrated that SPARC expression was down-regulated in Cd(2+) and As(3+) transformed UROtsa cells. In addition, the malignant epithelial component of tumors derived from these cell lines were also down-regulated for SPARC expression, but the stromal cells recruited to these tumors was highly reactive for SPARC. This finding was shown to translate to specimens of human bladder cancer where tumor cells were SPARC negative, but stromal cells were positive. Acute exposure of UROtsa cells to both cadmium and arsenite reduced the expression of SPARC through a mechanism that did not involve changes in DNA methylation or histone acetylation. These studies suggest that environmental exposure to As(3+) or Cd(2+) can alter cell-cell and cell-matrix interactions in normal urothelial cells through a reduction in the expression of SPARC. The SPARC associated loss of cell-cell and cell-matrix contacts may participate in the multi-step process of bladder carcinogenesis.
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Affiliation(s)
- Jennifer Larson
- Department of Anatomy and Cell Biology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USA.
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Harling M, Schablon A, Schedlbauer G, Dulon M, Nienhaus A. Bladder cancer among hairdressers: a meta-analysis. Occup Environ Med 2010; 67:351-8. [PMID: 20447989 PMCID: PMC2981018 DOI: 10.1136/oem.2009.050195] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Background Occupational risks for bladder cancer in hairdressers by using hair products have been examined in many epidemiological studies. But owing to small sample sizes of the studies and the resulting lack of statistical power, the results of these studies have been inconsistent and significant associations have rarely been found. Methods We conducted a meta-analysis to determine summary risk ratios (SRRs) for the risk of bladder cancer among hairdressers. Studies were identified by a MEDLINE, EMBASE, CENTRAL search and by the reference lists of articles/relevant reviews. Statistical tests for publication bias and for heterogeneity as well as sensitivity analysis were applied. In addition, the study quality and the risk of bias were assessed using six criteria. Results 42 studies were included and statistically significantly increased risks around 1.3–1.7 were found for all but one analysis. The SRR increased with duration of employment from 1.30 (95% CI 1.15 to 1.48) for ‘ever registered as hairdresser’ to 1.70 (95% CI 1.01 to 2.88) for ‘job held ≥10 years’. No difference was found between the risk for smoking-adjusted data (SRR 1.35, 95% CI 1.13 to 1.61) and no adjustment (SRR 1.33, 95% CI 1.18 to 1.50). Studies assessed as being of high quality (n=11) and of moderate quality (n=31) showed similar SRRs. There was no evidence of publication bias or heterogeneity in all analyses. Conclusion In summary, our results showed an increased and statistically significant risk for bladder cancer among hairdressers, in particular for hairdressers in jobs held ≥10 years. Residual confounding by smoking cannot be totally ruled out. Because of the long latency times of bladder cancer it remains an open question whether hairdressers working prior to 1980 and after 1980, when some aromatic amines were banned as hair dye ingredients, have the same risk for bladder cancer.
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Affiliation(s)
- Melanie Harling
- Institution for Statutory Accident Insurance and Prevention in the Health and Welfare Services, Department of Occupational Health Research, Pappelallee 35/37, Hamburg 22089, Germany.
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Somji S, Zhou XD, Mehus A, Sens MA, Garrett SH, Lutz KL, Dunlevy JR, Zheng Y, Sens DA. Variation of keratin 7 expression and other phenotypic characteristics of independent isolates of cadmium transformed human urothelial cells (UROtsa). Chem Res Toxicol 2010; 23:348-56. [PMID: 19921857 DOI: 10.1021/tx900346q] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This laboratory has shown that a human urothelial cell line (UROtsa) transformed by cadmium (Cd(2+)) produced subcutaneous tumor heterotransplants that resemble human transitional cell carcinoma (TCC). In the present study, additional Cd(2+) transformed cell lines were isolated to determine if independent exposures of the cell line to Cd(2+) would result in malignantly transformed cell lines possessing similar phenotypic properties. Seven independent isolates were isolated and assessed for their doubling times, morphology, ability to heterotransplant subcutaneously and in the peritoneal cavity of nude mice, and for the expression of keratin 7. The 7 cell lines all displayed an epithelial morphology with no evidence of squamous differentiation. Doubling times were variable among the isolates, being significantly reduced or similar to those of the parental cells. All 7 isolates were able to form subcutaneous tumor heterotransplants with a TCC morphology, and all heterotransplants displayed areas of squamous differentiation of the transitional cells. The degree of squamous differentiation varied among the isolates. In contrast to subcutaneous tumor formation, only 1 isolate of the Cd(2+) transformed cells (UTCd#1) was able to effectively colonize multiple sites within the peritoneal cavity. An analysis of keratin 7 expression showed no correlation with squamous differentiation for the subcutaneous heterotransplants generated from the 7 cell lines. Keratin 7 was expressed in 6 of the 7 cell lines and their subcutaneous tumor heterotransplants. Keratin 7 was not expressed in the cell line that was able to form tumors within the peritoneal cavity. These results show that individual isolates of Cd(2+) transformed cells have both similarities and differences in their phenotype.
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Affiliation(s)
- Seema Somji
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota 58202, USA
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Reulen RC, Kellen E, Buntinx F, Brinkman M, Zeegers MP. A meta-analysis on the association between bladder cancer and occupation. ACTA ACUST UNITED AC 2010:64-78. [PMID: 18815919 DOI: 10.1080/03008880802325192] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Raoul C. Reulen
- Centre for Childhood Cancer Survivor Studies, Department of Public Health and Epidemiology, University of Birmingham, Birmingham, UK
| | - Eliane Kellen
- Department of General Practice, Catholic University of Leuven, Leuven, Belgium
| | - Frank Buntinx
- Department of General Practice, Catholic University of Leuven, Leuven, Belgium
- Department of General Practice, Maastricht University, Maastricht, The Netherlands
| | - Maree Brinkman
- Department of General Practice, Catholic University of Leuven, Leuven, Belgium
- Cancer Epidemiology Centre, The Cancer Council, Victoria, Australia
| | - Maurice P. Zeegers
- Unit of Genetic Epidemiology, Department of Public Health and Epidemiology, University of Birmingham, Birmingham, UK
- Department of Complex Genetics, Nutrition and Toxicology Research Institute, University of Maastricht, The Netherlands
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Bachand A, Mundt KA, Mundt DJ, Carlton LE. Meta-analyses of occupational exposure as a painter and lung and bladder cancer morbidity and mortality 1950-2008. Crit Rev Toxicol 2010; 40:101-25. [PMID: 20085479 DOI: 10.3109/10408440903352826] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The International Agency for Research on Cancer (IARC) classified occupational painting as a human carcinogen based on lung and bladder cancers; however, no specific exposures were implicated. The authors conducted comprehensive meta-analyses of the epidemiological literature on occupational painting and these cancers. The authors abstracted study results and confounder information, and used quantile plots and regression models to evaluate heterogeneity and publication bias. Summary risk estimates were derived and sensitivity analyses performed to evaluate smoking, socioeconomic status (SES), and exposure variables. Where applicable, a Bayesian approach was used to externally adjust for smoking, a major risk factor for both cancers. For lung cancer cohort mortality studies, publication bias and heterogeneity were seen, and earlier studies reported higher risk estimates than later studies. Overall lung cancer summary risk estimates were 1.29 for case-control and 1.22 and 1.36 for cohort morbidity and mortality studies, respectively, and risk estimates for bladder cancer were 1.28 for case-control and 1.14 and 1.27 for cohort morbidity and mortality studies, respectively (all statistically significant). Risks did not differ between painters and mixed occupations. Nonsignificant summary estimates resulted for lung and bladder cancers when controlling for SES, or externally adjusting for smoking in lung cancer studies. Summary risks varied by control source for case-control studies. Residual confounding by smoking and SES, lack of exposure group effect, and publication bias limit the ability of the meta-analyses to explain associations observed between occupational painting and lung and bladder cancers. Given the long latencies for lung and bladder cancers, these weak associations, if real, may not be elucidated through studies of occupational painting today.
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Affiliation(s)
- Annette Bachand
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, Colorado, USA
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Kurowska E, Bal W. Recent Advances in Molecular Toxicology of Cadmium and Nickel. ADVANCES IN MOLECULAR TOXICOLOGY 2010. [DOI: 10.1016/s1872-0854(10)04003-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Golabek T, Darewicz B, Borawska M, Markiewicz R, Socha K, Kudelski J. Lead concentration in the bladder tissue and blood of patients with bladder cancer. ACTA ACUST UNITED AC 2009; 43:467-70. [DOI: 10.3109/00365590903198991] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
| | | | - Maria Borawska
- Department of Bromatology, Medical University in Bialystok, Bialystok, Poland
| | - Renata Markiewicz
- Department of Bromatology, Medical University in Bialystok, Bialystok, Poland
| | - Katarzyna Socha
- Department of Bromatology, Medical University in Bialystok, Bialystok, Poland
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Takkouche B, Regueira-Mendez C, Montes-Martinez A. Risk of cancer among hairdressers and related workers: a meta-analysis. Int J Epidemiol 2009; 38:1512-31. [DOI: 10.1093/ije/dyp283] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Galectin-3 in urine of cancer patients: stage and tissue specificity. J Cancer Res Clin Oncol 2008; 135:355-63. [PMID: 18836743 DOI: 10.1007/s00432-008-0481-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2008] [Accepted: 09/10/2008] [Indexed: 10/21/2022]
Abstract
PURPOSE Galectin-3 has been implicated in advanced stage of cancer disease. In the current study we examined the possibility of urinary galectin-3 levels to stage cancer disease and to follow up therapy. EXPERIMENTAL DESIGN Urine was collected from all types of cancer patients at different stages including patients undergoing radio/chemotherapy. Galectin-3 level was determined by anti-galectin-3 based ELISA and agglutination assays. Immunoblotting and purification on lactosyl affinity column further confirmed the presence of galectin-3. RESULTS Cancer samples exhibited stage dependent expression of galectin-3 approx. ranging from 1.0 to 3.3, 4.4 to 5.4, 5.4 to 24.7, 13.1 to 31.9, 13.9 to 32.9 ng/mg C (creatinine) for stage I-V, respectively, at P approximately <0.05 level. Galectin-3 levels were decreased by approx. threefolds after 5th day of therapy. CONCLUSIONS Sample collection being simple and non-invasive, urinary galectin-3 may be used as a potential diagnostic tool for monitoring or follow up of the stage of cancer disease.
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Lalor GC. Review of cadmium transfers from soil to humans and its health effects and Jamaican environment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2008; 400:162-172. [PMID: 18752835 DOI: 10.1016/j.scitotenv.2008.07.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2008] [Revised: 07/08/2008] [Accepted: 07/08/2008] [Indexed: 05/26/2023]
Abstract
Concerns about the effects of cadmium on human health have led to numerous guidelines and regulations limiting its concentrations in soils and food and allowable human intakes. These have socio-economic consequences in terms of land use and the marketing of food. The bauxite soils in Jamaica, which are both aluminium ores and agricultural soils contain orders of magnitude higher than world normal concentrations of cadmium resulting in elevated Cd concentrations in several foodstuffs and significant transfers to humans, which would seem to represent a risk factor for increased mortality and/or morbidity in the local populations. But, as in Shipham and other examples, there is no evidence of cadmium-related human distress. Macro-indicators like life expectancy and median ages of death do not show cadmium related geographical distributions. The present review focuses on the soils and foods and illnesses of high incidence especially cancers and renal disease that have been traditionally associated with cadmium. In view of the remarkable concentrations of cadmium involved in Jamaica, and often contradictory reports in the literature, it appears that much remains to be learned about certain details of cadmium toxicity.
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Affiliation(s)
- Gerald C Lalor
- International Centre for Environmental and Nuclear Sciences, University of the West Indies Mona, Kingston, Jamaica.
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Abstract
Oxidative (permanent) hair dyes contain one or several "primary intermediates" (e.g., p-phenylenediamines, p-aminophenols) and "couplers" (e.g., m-aminophenols, m-hydroxyphenols). In the presence of peroxide, the primary intermediate(s) and the coupler(s) undergo a chemical reaction to form colored oligomers. In the 1970s a number of aromatic amines used in oxidative hair dyes were identified as mutagenic and/or carcinogenic in rodents after lifetime oral administration. In response, regulatory action was taken, and some hair dye ingredients were banned in the European Union. Although recent results suggest that the main "primary intermediate" of oxidative hair dyes, p-phenylenediamine, has a weak genotoxic potential in vitro, it was not mutagenic in a mixture with nonmutagenic couplers, if tested under conditions comparable to those of practical use. Under conditions of use of permanent hair dyes, between 0.1 and 0.5% of the applied p-phenylenediamine may be absorbed through the skin. Acetylation in the skin is a key metabolic step for the primary intermediates p-phenylenediamine and p-aminophenol. Because of the involvement of aromatic amines, the discussion on the carcinogenicity of hair dyes in humans has been focused on urothelial cancer. Numerous epidemiological studies have investigated the risk of bladder cancer associated with the profession as a hairdresser, as well as the risk to consumers of hair dyes. Although some earlier studies suggested an overrepresentation of bladder cancer in male hairdressers, the majority of modern studies do not show an increase in relevant bladder cancer risk for professional or personal use of oxidative hair dyes. Today, there seems to be no relevant bladder cancer risk from the use of oxidative hair dyes. Such a conclusion can be derived from new toxicokinetic and metabolism investigations and is in general accordance with current epidemiological data. Human urothelial cancers, chemically induced by aromatic amines, have typical latency times often longer than 20 years. Since earlier exposures could have an impact decades later, the possibility of bladder cancer in hairdressers having intensively worked with permanent hair dyes during earlier decades (prior to the 1980s) should be taken into account.
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Affiliation(s)
- Hermann M Bolt
- Leibniz Research Centre for Working Environment and Human Factors, Institut für Arbeitsphysiologie an der Universität Dortmund, Dortmund, Germany.
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Huff J, Lunn RM, Waalkes MP, Tomatis L, Infante PF. Cadmium-induced cancers in animals and in humans. INTERNATIONAL JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HEALTH 2007; 13:202-12. [PMID: 17718178 PMCID: PMC3399253 DOI: 10.1179/oeh.2007.13.2.202] [Citation(s) in RCA: 229] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Discovered in the early 1800s, the use of cadmium and various cadmium salts started to become industrially important near the close of the 19th century, rapidly thereafter began to flourish, yet has diminished more recently. Most cadmium used in the United States is a byproduct from the smelting of zinc, lead, or copper ores, and is used to manufacture batteries. Carcinogenic activity of cadmium was discovered first in animals and only subsequently in humans. Cadmium and cadmium compounds have been classified as known human carcinogens by the International Agency for Research on Cancer and the National Toxicology Program based on epidemiologic studies showing a causal association with lung cancer, and possibly prostate cancer, and studies in experimental animals, demonstrating that cadmium causes tumors at multiple tissue sites, by various routes of exposure, and in several species and strains. Epidemiologic studies published since these evaluations suggest that cadmium is also associated with cancers of the breast, kidney, pancreas, and urinary bladder. The basic metal cationic portion of cadmium is responsible for both toxic and carcinogenic activity, and the mechanism of carcinogenicity appears to be multifactorial. Available information about the carcinogenicity of cadmium and cadmium compounds is reviewed, evaluated, and discussed.
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Affiliation(s)
- James Huff
- National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27514, USA.
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Burstyn I, Kromhout H, Johansen C, Langard S, Kauppinen T, Shaham J, Ferro G, Boffetta P. Bladder cancer incidence and exposure to polycyclic aromatic hydrocarbons among asphalt pavers. Occup Environ Med 2007; 64:520-6. [PMID: 17332134 PMCID: PMC2078500 DOI: 10.1136/oem.2006.029801] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES To investigate the association between exposures to polycyclic aromatic hydrocarbons (PAH) that arises during asphalt paving, and risk of bladder cancer. METHODS 7298 men included in the historical cohort were first employed between 1913 and 1999 in companies applying asphalt in Denmark, Norway, Finland and Israel. The minimal duration of employment for inclusion in the cohort was two seasons of work. Occupational histories were extracted from personnel files. A follow-up for cancer incidence was conducted through national cancer registries. The authors estimated exposures to benzo(a)pyrene as a marker for 4-6 ring PAH. Exposures were reconstructed by using information about changes in asphalt paving technology in each company over time, the modelled relation between production characteristics and exposure levels, and job histories. Relative risks and associated 95% confidence intervals were estimated using Poisson regression. RESULTS 48 bladder cancers among asphalt paving workers were detected; of these, 39 cases were exposed at least 15 years before the diagnosis. Cumulative exposure to PAH was not associated with the incidence of bladder cancer. The association with average exposure became stronger when 15-year lag was considered, revealing a twofold increase in relative bladder cancer risk in the two higher exposure categories. There was an indication of exposure-response association with lagged averaged exposure. Risk estimates were adjusted for age, country, duration of employment and calendar period, did not show heterogeneity among countries and did not materially change when re-estimated after excluding non-primary cancers from follow-up. Previously conducted sensitivity analysis indicates that confounding by cigarette smoking is an unlikely explanation for the observed exposure-response trends. CONCLUSIONS The authors were unable to control for all possible sources of confounding and bias. The results do not allow conclusion on the presence or absence of a causal link between exposures to PAH and risk of bladder cancer among asphalt workers.
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Affiliation(s)
- Igor Burstyn
- International Agency for Research on Cancer, Lyon, France.
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Kellen E, Zeegers MP, Hond ED, Buntinx F. Blood cadmium may be associated with bladder carcinogenesis: the Belgian case-control study on bladder cancer. ACTA ACUST UNITED AC 2007; 31:77-82. [PMID: 17296271 DOI: 10.1016/j.cdp.2006.12.001] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/04/2006] [Indexed: 11/28/2022]
Abstract
BACKGROUND The aim of this study was to assess the relationship between exposure to cadmium and bladder cancer risk. METHODS We conducted a case-control study in Belgium and measured the blood levels of cadmium in 172 bladder cases and 359 population controls. The data were analyzed as tertiles after logarithmic transformation. Cut-off points were based on the levels among the controls. Logistic regression was performed to calculate odds ratios (ORs) for bladder cancer occurrence with corresponding 95% confidence intervals (95% CI). RESULTS After adjustment for sex, age, and occupational exposure to PAHs or aromatic amines, the OR for cadmium was 8.3 (95% CI 5.0-13.8) comparing the highest to the lowest tertile (p for trend <0.001). Additional adjustment for smoking (current cigarette smoking status, years of cigarette smoking and number of cigarettes smoked per day) decreased the OR, however it remained strongly significant (OR: 5.7; 95% CI 3.3-9.9). CONCLUSION Our study suggests that individuals with increased exposure to cadmium have an increased risk of bladder cancer. Future studies should expand on this investigation by studying a larger number of bladder cancer patients and by collecting extensive information on the lifetime occupational, residential, and environmental exposures to clarify the role of cadmium in bladder cancer.
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Affiliation(s)
- Eliane Kellen
- Department of General Practice, Katholieke Universiteit Leuven, Comprehensive Cancer Institute Limburg, Belgium.
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Baena AV, Allam MF, Díaz-Molina C, Del Castillo AS, Abdel-Rahman AG, Navajas RFC. Urinary bladder cancer and the petroleum industry: a quantitative review. Eur J Cancer Prev 2007; 15:493-7. [PMID: 17106328 DOI: 10.1097/01.cej.0000198895.94560.38] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
PURPOSE To estimate the pooled risk of petroleum industry for urinary bladder cancer. MATERIAL AND METHODS All observational studies that evaluated the association between urinary bladder risk and the petroleum industry were reviewed. We have only identified eight case-control studies. These studies were carried out between 1989 and 1995. RESULTS Of the eight localized studies six were exclusively for males. The other two studies included both males and females, but none reported separately the risk among men and women. There was an obvious risk of petroleum industry in the pooled risk (odds ratio 1.4, 95% confidence interval (CI) 1.27-1.54). Also, Q test was not significant (P>0.1), denoting homogeneity across the pooled studies. Pooled analysis applying the random effect model was 1.50 (95% CI 1.29-1.75). CONCLUSION Although our pooled estimate shows that the petroleum industry is associated with the risk of urinary bladder cancer, the eight studies were based on retrospective data from case-control studies. Further prospective studies evaluating the association between petroleum industry and urinary bladder cancer risk are strongly needed.
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Affiliation(s)
- Antonio Varo Baena
- Section of Epidemiology, Province Delegation of Health, Andalucian Health Service, Cordoba, Spain
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Kellen E, Zeegers M, Paulussen A, Vlietinck R, Vlem EV, Veulemans H, Buntinx F. Does occupational exposure to PAHs, diesel and aromatic amines interact with smoking and metabolic genetic polymorphisms to increase the risk on bladder cancer?; The Belgian case control study on bladder cancer risk. Cancer Lett 2007; 245:51-60. [PMID: 16504378 DOI: 10.1016/j.canlet.2005.12.025] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2005] [Revised: 12/15/2005] [Accepted: 12/19/2005] [Indexed: 10/25/2022]
Abstract
To investigate the association between occupational exposure to polycyclic aromatic hydrocarbons, aromatic amines and diesel and bladder cancer risk and the modification by smoking and metabolic polymorphisms, have we recruited 200 cases and 385 population controls. The adjusted OR of bladder cancer was 5.75 (95%CI 2.09-15.83) comparing the highest tertile of the cumulative probability of occupational exposure to aromatic amines with no occupational exposure. A possible interaction between occupational exposures to aromatic amines and smoking was found. The increased ORs of GSTM1, GSTT1, NAT2 and SULT1A1 among those ever occupational exposed was explored by estimating the false-positive report probability. We confirm that occupational exposure to aromatic amines is associated with an increase in bladder cancer risk.
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Affiliation(s)
- Eliane Kellen
- Department of General Practice, Katholieke Universiteit Leuven, Comprehensive Cancer Institute Limburg, Belgium.
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Olfert SM, Felknor SA, Delclos GL. An Updated Review of the Literature: Risk Factors for Bladder Cancer with Focus on Occupational Exposures. South Med J 2006; 99:1256-63. [PMID: 17195421 DOI: 10.1097/01.smj.0000247266.10393.72] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Workplace exposures account for 5 to 25% of all bladder cancer cases. A critical review of the literature between 1938 and 2004 was performed, with a focus on occupational exposures. Occupational exposure to bladder carcinogens, particularly to beta-naphthylamine occur in a number of industries, including aromatic amine manufacture, rubber and cable manufacture, and dyestuff manufacture and use. Risks to workers in a number of new occupations and industries are reviewed. Nonoccupational risk factors that are known or at one time have been thought to increase the risk of bladder cancer are also discussed.
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Affiliation(s)
- Sandra M Olfert
- University of Texas School of Public Health at Houston, Southwest Center for Occupational and Environmental Health, Houston, TX 77030, USA
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Wernli KJ, Astrakianakis G, Camp JE, Ray RM, Chang CK, Li GD, Thomas DB, Checkoway H, Seixas NS. Development of a job exposure matrix (JEM) for the textile industry in Shanghai, China. JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE 2006; 3:521-9. [PMID: 16908453 DOI: 10.1080/15459620600902166] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
We developed a job exposure matrix (JEM) for the Shanghai textile industry constructed along three axes: industry sector, textile process, and hazardous agent. We assessed 35 different categories of dust, chemical, and physical agents for 149 textile processes within nine industry sectors: cotton, cotton/synthetic, cotton/other (nonsynthetic), wool, silk, synthetic, mineral, other mixed (e.g., wool and synthetic), and nonproduction. The JEM was constructed from two components: a priori assessment of the textile process by a team of U.S. industrial hygienists, and the prevalence of exposures reported by Chinese industrial hygienists in specific textile processes within the factory. The JEM was applied to an ongoing case-cohort study of cancer in women textile workers. The JEM assessed only dichotomous exposure (ever/never), and could be coupled with cumulative exposure by years of employment. The most common exposures in cotton mills were cotton dust and solvent exposures. Dyeing processes had the highest frequency of exposures, including solvents, acids, bases and caustics, bleaching agents, dyes, dye chemicals and intermediates, and formaldehyde. Only two processes were identified with formaldehyde exposure, beck dyeing and resin finishing. The most prevalent exposures among the subcohort, occurring in more than 60% of the women, were electromagnetic fields, lubricants, and cotton dust. More than one-third of subcohort subjects were also exposed to synthetic fiber dust, and slightly less than one-third of women were exposed to endotoxin. This JEM could be applicable for epidemiologic research in other textile industries.
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Affiliation(s)
- Karen J Wernli
- Fred Hutchinson Cancer Research Center, Seattle, Washington 98109-1024, USA.
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Dönbak L, Rencüzoğullari E, Topaktas M, Sahin G. A biomonitoring study on the workers from textile dyeing plants. RUSS J GENET+ 2006. [DOI: 10.1134/s1022795406060044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zhou XD, Sens DA, Sens MA, Namburi VBRK, Singh RK, Garrett SH, Somji S. Metallothionein-1 and -2 expression in cadmium- or arsenic-derived human malignant urothelial cells and tumor heterotransplants and as a prognostic indicator in human bladder cancer. Toxicol Sci 2006; 91:467-75. [PMID: 16565513 DOI: 10.1093/toxsci/kfj174] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The goal of this study was to determine if the expression of the metallothionein (MT)-1/2 proteins might serve as a biomarker for the development of bladder cancer. A retrospective analysis of MT-1/2 staining was performed on 343 tissue sections from patients referred for the diagnosis of bladder cancer. The specimens were subdivided into six categories: benign, dysplastic, low-grade cancer, high-grade cancer with no evidence of invasion, high-grade cancer with evidence of invasion, and carcinoma in situ. There was no expression of MT-1/2 in benign lesions and low-grade cancers, a low incidence of expression in dysplastic lesions and high-grade cancers with no evidence of muscle invasion, and a significantly increased incidence of MT-1/2 in high-grade cancers that had invaded the underlying matrix. The expression of MT-1/2 varied in intensity from sample to sample and was focal in its expression. It was concluded from these findings that MT-1/2 may be a prognostic marker for cancers that are progressing to invade the underlying stroma of the bladder wall. The expression of MT-1/2 was also determined in a cell culture model of human urothelium that had been malignantly transformed by Cd2+ and As3+ and shown to be capable of tumor formation in nude mice. It was demonstrated that the expression of MT-1/2 in the tumor heterotransplants was similar to the pattern found in archival specimens of high-grade bladder cancers. The MT-1/2 staining in the heterotransplants was focal in pattern, varied in intensity, and highest in the less differentiated cells of the tumor. These findings indicate that the cell culture model may serve to help define the role of MT-1/2 expression in bladder cancer invasion.
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Affiliation(s)
- Xu Dong Zhou
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota 58202, USA
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Bosetti C, Pira E, La Vecchia C. Bladder Cancer Risk in Painters: a Review of the Epidemiological Evidence, 1989–2004*. Cancer Causes Control 2005; 16:997-1008. [PMID: 16184465 DOI: 10.1007/s10552-005-3636-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2004] [Accepted: 03/11/2005] [Indexed: 10/25/2022]
Abstract
Epidemiological studies on the potential association between painting and the risk of bladder cancer published after the Monograph of the International Agency for Research on Cancer N. 47 of 1989 have been systematically reviewed. These included four cohort studies on the incidence of bladder cancer among painters, with a pooled relative risk (RR) of 1.10 (95% confidence interval, CI, 1.03-1.18), based on 893 cases observed. The corresponding summary RR from four cohort studies on mortality was 1.23 (95% CI 1.11-1.37), based on 370 deaths. The pooled RR from 14 case-control studies and a pooled-analysis of other 11 case-control studies was 1.35 (95% CI 1.19-1.53), based on 465 cases exposed. Overall, the RR from all epidemiological studies was 1.17 (95% 1.11-1.27). Thus, recent epidemiological evidence indicates a moderate excess risk for bladder cancer in painters. Some studies, however, suggested that any such risk would have been greater for exposures in the distant past. Open issues for interpretation include residual confounding by social class and tobacco smoking, and understanding the time-risk relation. In particular, the potential residual risk related to exposure over the last two to three decades remains to be defined.
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Affiliation(s)
- Cristina Bosetti
- Istituto di Ricerche Farmacologiche Mario Negri, via Eritrea, 62-20157, Milan, Italy.
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Garrett SH, Park S, Sens MA, Somji S, Singh RK, Namburi VBRK, Sens DA. Expression of metallothoinein isoform 3 is restricted at the post-transcriptional level in human bladder epithelial cells. Toxicol Sci 2005; 87:66-74. [PMID: 15958653 DOI: 10.1093/toxsci/kfi231] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
This study was designed to define the effect that overexpression of MT-3 would have on a cell culture model of bladder urothelium. Stable and inducible transfection was used to achieve overexpression of the MT-3 gene in the UROtsa cell line. When the UROtsa cells were stably transfected with the MT-3 coding sequence, there was highly elevated expression of MT-3 mRNA, but no MT-3 protein. An inducible vector showed that low basal levels of MT-3 mRNA and protein could be produced, but that induction only increased MT-3 mRNA and not protein. The clones expressing low basal levels of MT-3 protein also had reduced growth rates compared to control cells. Site directed mutagenesis was used to produce an MT-3 coding sequence where the prolines in positions 7 and 9 were converted to threonines. When this altered MT-3 was stably transfected into the UROtsa cells, the cells were able to accumulate the mutated form of the MT-3 protein. These studies show that MT-3 protein expression is inhibited by post-transcriptional control in the urothelial cell. Modifying the MT-3 protein to resemble the MT-1 isoform removes this component of post-transcriptional control and allows accumulation of the mutated MT-3 protein. The altered sequence involved in post-transcriptional control of MT-3 protein expression is the same sequence implicated in the neuronal growth inhibitory activity associated specifically with the MT-3 isoform of the MT gene family.
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Affiliation(s)
- Scott H Garrett
- Department of Pathology, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, North Dakota 58202, USA
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Baena AV, Allam MF, Díaz-Molina C, del Castillo AS, Requena Tapia MJ, Navajas RFC. ¿Cuáles son los factores de riesgo para desarrollar un cáncer de vejiga? Clin Transl Oncol 2004. [DOI: 10.1007/bf02710061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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46
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Fryzek JP, Chadda B, Marano D, White K, Schweitzer S, McLaughlin JK, Blot WJ. A cohort mortality study among titanium dioxide manufacturing workers in the United States. J Occup Environ Med 2003; 45:400-9. [PMID: 12708144 DOI: 10.1097/01.jom.0000058338.05741.45] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Although titanium dioxide (TiO2) is generally regarded as a nontoxic mild pulmonary irritant, some laboratory studies have reported lung adenomas in rats exposed to high levels of TiO2. Limited data on health effects among humans exist. A retrospective cohort mortality study was conducted among 4241 TiO2 workers who were employed for at least 6 months, on or after January 1, 1960, at four TiO2 plants in the United States. Exposure categories, defined by plant, job title, and calendar years in the job, were created to examine mortality patterns in those jobs where the potential for TiO2 exposure is greatest. Standardized mortality ratios (SMRs) and their 95% confidence intervals (CI) were calculated to compare the mortality pattern of the workers with the general background population. Relative risks were estimated and trend tests were conducted to examine risk of disease among different exposure level groups in internal analyses. Workers experienced a significantly low overall mortality (SMR = 0.8; 95% CI = 0.8-0.9). No significantly increased SMRs were found for any specific cause of death. Deaths from lung cancer were as expected, and SMRs for this cancer did not increase with increasing TiO2 levels. Workers in jobs with greatest TiO2 exposure had significantly fewer than expected total deaths (SMR = 0.7; 95% CI = 0.6-0.9). Internal analyses revealed no significant trends or exposure-risk associations for total cancers, lung cancer, or other causes of death. Results from our study indicate that the exposures at these United States plants are not associated with increases in the risk of death from cancer or other diseases. Moreover, workers with likely higher levels of TiO2 exposure had similar mortality patterns to those with less exposure, as internal analyses among workers revealed no increase in mortality by level of TiO2 exposure.
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Affiliation(s)
- Jon P Fryzek
- International Epidemiology Institute, 1455 Research Blvd, Suite 550, Rockville, MD 20850, USA
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47
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Marsh GM, Gula MJ, Youk AO, Cassidy LD. Bladder cancer among chemical workers exposed to nitrogen products and other substances. Am J Ind Med 2002; 42:286-95. [PMID: 12271476 DOI: 10.1002/ajim.10116] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To investigate further bladder cancer mortality excess based on four deaths observed among the internal comparison population of a previous historical cohort study of workers from a chemical plant in Lima, Ohio. The internal population mainly comprised workers from the Nitrogen Products (NP) Division. METHODS The original Lima cohort was expanded to include all workers (n = 1,841) employed between 1955 and 1996. A subcohort of workers employed mainly in the NP Division (NP Subcohort) was identified and used as the primary study population and as the source of cases and controls for a matched case-control study of bladder cancer. All death records were reviewed for any mention of bladder cancer; all available personnel, medical, and insurance files were reviewed to identify any current or former employees with an existing diagnosis of bladder cancer. A qualitative exposure assessment of all cases and controls was performed to evaluate an exploratory hypothesis that the bladder cancer excess may be associated with work histories involving both NP and urea, specifically, nitric acid and urea. RESULTS We identified 96 new deaths among the expanded Lima cohort and obtained cause of death for 90. One additional bladder cancer death and one living case were identified and these were members of the original Lima cohort. The bladder cancer standardized mortality ratio (SMR) for the NP Subcohort (SMR = 3.31, 95%CI = 0.90-8.47) fell between the SMRs observed for all workers in the original and expanded Lima cohort (SMR = 3.93, 95%CI = 1.07-10.06 and 3.10, 95%CI = 1.01-7.24, respectively), but was markedly less than the SMR observed for corresponding subcohort of AN-unexposed workers in the original Lima cohort (SMR = 7.01, 95%CI = 1.91-17.96). Sparse data and a high prevalence of exposure among controls precluded an informative statistical analysis of the possible association between work histories involving both nitric acid and urea and bladder cancer risk. CONCLUSIONS This study confirms that bladder cancer mortality is elevated among persons who worked mainly in the NP Division of the Lima plant, but at a lower, less statistically significant level than indicated by the original cohort study. No occupational risk factors considered to be causally related to the bladder cancer excess could be identified by this intensive investigation; other possible reasons for the excess are suggested by the descriptive data.
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Affiliation(s)
- Gary M Marsh
- Department of Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA. gmarsh+@pitt.edu
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Abstract
To clarify the inconsistent reports of bladder cancer risk in foundry workers, a meta-analytic review of epidemiological studies was undertaken. Summary risk estimates (SRE) were calculated from 40 systematically extracted results. Weakly increased risks were observed overall, with an SRE of 1.11. Twenty three selected study results with better exposure information yielded an SRE of 1.16. This weak increase in risk is consistent with estimates obtained from dose-response trends of PAH exposures in aluminium smelter workers. Summary estimates did not vary substantially with exposure quality, study design, control for smoking, or when limiting the meta-analysis to large study results. Exposure-response findings showed significantly increased risks of about 1.6 to 1.7 after 20 or more years of employment, but this was based on few studies. Occupation specific SREs showed a 40-50% increased risk among moulders, casters, and unskilled foundry labourers. There was limited evidence that bladder cancer risk correlated with lung cancer risk, which is a more established risk among foundry workers. The small increased risk observed is prone to bias and confounding. Further studies of dose-response trends would greatly aid in determining whether this observed association is causal.
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Affiliation(s)
- R R W Gaertner
- Medical and Occupational Disease Policy Branch, Workplace Safety and Insurance Board, Ontario, Canada.
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Mastrangelo G, Fedeli U, Fadda E, Milan G, Lange JH. Epidemiologic evidence of cancer risk in textile industry workers: a review and update. Toxicol Ind Health 2002; 18:171-81. [PMID: 12974540 DOI: 10.1191/0748233702th139rr] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A meta-analysis of epidemiologic studies for textile industry workers was undertaken in an attempt to evaluate whether the cancer risk varies within the textile industry in relation to the job held or the textile fiber used. We combined studies published up until 1990, when an ad hoc IARC Monograph was issued, and those published after 1990 with the aim of appreciating evidence of reversing trends in cancer risk. Observed and expected cases reported in the original studies were summed up and the totals were divided to obtain a pooled relative risk (PRR) with a 95% confidence interval (CI) estimated with a fixed-effect model. We calculated a chi-square test (chi2) of heterogeneity among studies. When PRR and chi2 were both significant, PRR and CI were calculated with a random-effect model and the source of heterogeneity was investigated. Lung cancer risk was around 0.4 in the first study on cotton workers published in 1936, around 0.7 in subsequent studies, mostly published in the 1970s and 1980s, and around 1.0 in the last studies published in the 1990s. Papers published in the 1970s and 1980s produced consistent risk estimates for lung cancer risk, which was significantly lower than 1.0 in workers exposed to cotton (PRR = 0.77; CI = 0.69-0.86) and wool dust (0.71; 0.50-0.92), as well as in carders and fiber preparers (0.73; 0.54-0.91), weavers (0.71; 0.56-0.85), and spinners and weavers (0.78; 0.66-0.91). Lung cancer PRRs did not significantly deviate from 1.0 in textile workers using synthetic fibers or silk, and in dyers. Increased PRRs were found for sinonasal cancer in workers exposed to cotton dust, and in workers involved in spinning or weaving (4.14; 1.80-6.49). PRR was 1.46 (1.10-1.82) for cancer of the digestive system in textile workers using synthetic fibers or silk, and 1.34 (1.10-1.59) for colorectal cancer in spinners and weavers. The increased bladder cancer PRR in dyers (1.39; 1.07-1.71) is generally attributed to textile dye exposure. In studies published after 1990, there is a general tendency to move toward unity for all the cancer risk estimates, leading to an increasing heterogeneity among studies. Since adjustment for smoking made little difference to the findings, the latter could be attributed to the exposure to textile dusts. The recent findings could be due to a lowering of dust concentration in the workplaces. The reduction of cases of upper respiratory tract cancer parallels with a corresponding increase of lung cancer cases. So, preventive measures have paradoxically increased the lung cancer burden to the textile workers.
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Affiliation(s)
- Giuseppe Mastrangelo
- Department of Environmental Medicine and Public Health, Section of Occupational Medicine, University of Padua, Italy.
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Zeegers MP, Swaen GM, Kant I, Goldbohm RA, van den Brandt PA. Occupational risk factors for male bladder cancer: results from a population based case cohort study in the Netherlands. Occup Environ Med 2001; 58:590-6. [PMID: 11511746 PMCID: PMC1740187 DOI: 10.1136/oem.58.9.590] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES This study was conducted to estimate risk of bladder cancer associated with occupational exposures to paint components, polycyclic aromatic hydrocarbons (PAHs), diesel exhausts, and aromatic amines among the general population in The Netherlands. METHODS A prospective cohort study was conducted among 58,279 men. In September 1986, the cohort members (55-69 years) completed a self administered questionnaire on risk factors for cancer including job history. Follow up for incident bladder cancer was established by linkage to cancer registries until December 1992. A case-cohort approach was used based on 532 cases and 1630 subcohort members. A case by case expert assessment was carried out to assign to the cases and subcohort members a cumulative probability of occupational exposure for each carcinogenic exposure. RESULTS Men in the highest tertiles of occupational exposure to paint components, PAHs, aromatic amines, and diesel exhaust had non-significantly higher age and smoking adjusted incident rate ratios (RRs) of bladder cancer than men with no exposure: 1.29 (95% confidence interval (95% CI) 0.71 to 2.33), 1.24 (95% CI 0.68 to 2.27), 1.32 (95% CI 0.41 to 4.23) and 1.21 (95% CI 0.78 to 1.88), respectively. The associations between paint components and PAHs and risk of bladder cancer were most pronounced for current smokers. Among former smokers it seemed that for cumulative probability of exposure to paint components and PAHs, men who had smoked more than 15 cigarettes a day had RRs below unity compared with men who had smoked less than 15 cigarettes a day, whereas among current smokers the opposite was found. Exposure to diesel exhaust was positively associated with risk of bladder cancer among current and former smokers who had smoked more than 15 cigarettes a day. CONCLUSIONS This study provided only marginal evidence for an association between occupational exposure to paint components, PAHs, aromatic amines, and bladder cancer. Despite the small proportion of exposed subjects, an interaction with cigarette smoking was found, specifically for paint components, suggesting that the carcinogenic effect on the bladder might decrease after stopping smoking.
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Affiliation(s)
- M P Zeegers
- Department of Epidemiology, Maastricht University, PO Box 616, 6200 MD Maastricht, The Netherlands.
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