1
|
Korchevskiy AA, Wylie AG. Dimensional determinants for the carcinogenic potency of elongate amphibole particles. Inhal Toxicol 2021; 33:244-259. [PMID: 34612763 DOI: 10.1080/08958378.2021.1971340] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
CONTEXT Carcinogenic properties of particulates depend, among other factors, on dimensional characteristics that affect their ability to reach sensitive tissue, to be removed or retained, and to interact with the cells. OBJECTIVE To model mesothelioma and lung cancer potency of amphibole particles based on their dimensional characteristics and mineral habit (asbestiform vs. nonasbestiform) utilizing epidemiological data and detailed size information. METHODS The datasets from recently created depository of dimensional information of elongate mineral particles were used to correlate mesothelioma and lung cancer potency with the fraction of particles in a specific size range and the ratio of length and width in different powers. In addition, the cancer potency factors were estimated and compared for 30 asbestiform, 15 nonasbestiform, and 10 mixed datasets. RESULTS For particles longer than 5 µm, the highest correlation with mesothelioma potency was achieved for width <0.22 µm, and with lung cancer <0.28 µm. The statistical power of the correlation was observed to lose significance at a maximum width of 0.6-0.7 µm. Mesothelioma potency correlated with length in the power of 1.9 divided by width in the power of 2.97, lung cancer potency with length in the power of 0.4 divided by width in the power of 1.17. The predicted cancer potencies of asbestiform, nonasbestiform, and mixed categories were significantly different. CONCLUSION While additional studies in this direction are warranted, this paper should serve as an additional confirmation for the role of fiber dimensions in the carcinogenicity of amphibole elongate mineral particles (EMPs).
Collapse
Affiliation(s)
| | - Ann G Wylie
- Department of Geology, Department of Geology, University of Maryland, College Park, MD, USA
| |
Collapse
|
2
|
Dell LD, Gallagher AE, Yost LJ, Mundt KA. Integration of Evidence on Community Cancer Risks from Elongate Mineral Particles in Silver Bay, Minnesota. RISK ANALYSIS : AN OFFICIAL PUBLICATION OF THE SOCIETY FOR RISK ANALYSIS 2021; 41:1674-1692. [PMID: 33533080 PMCID: PMC8596417 DOI: 10.1111/risa.13673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 11/05/2020] [Accepted: 11/15/2020] [Indexed: 05/12/2023]
Abstract
The potential for cancer-related risks to community members from ambient exposure to elongate mineral particles (EMPs) in taconite processing has not been formally evaluated. We evaluated 926 ambient air samples including 12,928 EMPs (particle structures with length-to-width ratio ≥3:1) collected over 26 years near a taconite processing facility in Silver Bay, Minnesota. Eighty-two percent of EMPs were ≤3 μm in length and 97% of EMPs had an average aspect ratio <20:1. A total of 935 (7.3%) EMPs had length >5 μm and AR ≥3:1. Average ambient concentration of NIOSH countable amphibole EMPs over all years was 0.000387 EMPs per cubic centimeter (EMP/cm3 ). Of 12,765 nonchrysotile EMPs, the number of amphiboles with length and width dimensions that correlate best with asbestos-related carcinogenicity ranged from four (0.03%) to 13 (0.1%) and the associated ambient amphibole air concentrations ranged from 0.000003 to 0.000007 EMP/cm3 . After 65 years of taconite processing in Silver Bay, evidence of an increased risk of mesothelioma and lung cancer in community members who did not work in the taconite industry is lacking. The absence of an increased risk of asbestos-related cancer in the Silver Bay community is coherent with supporting evidence from epidemiological and toxicological studies, as well as ambient exposure data and lake sediment data collected in Minnesota Iron Range communities. Collectively, the data provide consistent evidence that nonasbestiform amphibole minerals lack the carcinogenic potential exhibited by amphibole asbestos.
Collapse
|
3
|
Pfau JC, Barbour C, Black B, Serve KM, Fritzler MJ. Analysis of autoantibody profiles in two asbestiform fiber exposure cohorts. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2018; 81:1015-1027. [PMID: 30230971 PMCID: PMC6336195 DOI: 10.1080/15287394.2018.1512432] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
An increased risk for Systemic Autoimmune Diseases (SAID) was reported in the population of Libby, Montana, where extensive exposure to asbestiform amphiboles occurred through mining and use of asbestiform fiber-laden vermiculite. High frequencies of antinuclear autoantibodies (ANA) were detected in individuals and mice exposed to Libby Asbestiform Amphiboles (LAA). Among the 6603 individuals who have undergone health screening at the Center for Asbestos Related Diseases (CARD, Libby MT), the frequencies of rheumatoid arthritis, systemic lupus erythematosus, sarcoidosis, and systemic sclerosis are significantly higher than expected prevalence in the United States. While these data support the hypothesis that LAA can trigger autoimmune responses, evidence suggests that chrysotile asbestos does not. Serological testing was therefore performed in subjects exposed to LAA or predominantly chrysotile (New York steamfitters) using multiplexed array technologies. Analyses were performed in order to determine a) autoantibody profiles in each cohort, and b) whether the two populations could be distinguished through predictive modeling. Analysis using perMANOVA testing confirmed a significant difference between autoantibody profiles suggesting differential pathways leading to autoantibody formation. ANA were more frequent in the LAA cohort. Specific autoantibodies more highly expressed with LAA-exposure were to histone, ribosomal P protein, Sm/Ribonucleoproteins, and Jo-1 (histidyl tRNA synthetase). Myositis autoantibodies more highly expressed in the LAA cohort were Jo-1, PM100, NXP2, and Mi2a. Predictive modeling demonstrated that anti-histone antibodies were most predictive for LAA exposure, and anti-Sm was predictive for the steamfitters' exposure. This emphasizes the need to consider fiber types when evaluating risk of SAID with asbestos exposure.
Collapse
Affiliation(s)
- Jean C. Pfau
- Department of Microbiology & Immunology, Montana State University, Bozeman MT 59718
| | - Christopher Barbour
- Statistical Consulting and Research Services, Montana State University, Bozeman MT 59718
| | - Brad Black
- Center for Asbestos Related Diseases, Libby MT 59923
| | - Kinta M. Serve
- Idaho State University, Department of Biological Sciences, Pocatello ID 83209
| | | |
Collapse
|
4
|
Yanamala N, Kisin ER, Gutkin DW, Shurin MR, Harper M, Shvedova AA. Characterization of pulmonary responses in mice to asbestos/asbestiform fibers using gene expression profiles. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2017; 81:60-79. [PMID: 29279043 DOI: 10.1080/15287394.2017.1408201] [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
Humans exposed to asbestos and/or asbestiform fibers are at high risk of developing many lung diseases including asbestosis, lung cancer, and malignant mesothelioma. However, the disease-causing potential and specific metabolic mechanisms and pathways associated with various asbestos/asbestiform fiber exposures triggering different carcinogenic and non-carcinogenic outcomes are still largely unknown. The aim of this this study was to investigate gene expression profiles and inflammatory responses to different asbestos/asbestiform fibers at the acute/sub-acute phase that may be related to delayed pathological outcomes observed at later time points. Mice were exposed to asbestos (crocidolite, tremolite asbestos), asbestiform fibers (erionite), and a low pathogenicity mineral fiber (wollastonite) using oropharyngeal aspiration. Similarities in inflammatory and tissue damage responses, albeit with quantitative differences, were observed at day 1 and 7 post treatment. Exposure to different fibers induced significant changes in regulation and release of a number of inflammatory cytokines/chemokines. Comparative analysis of changes in gene regulation in the lung on day 7 post exposure were interpretable in the context of differential biological responses that were consistent with histopathological findings at days 7 and 56 post treatment. Our results noted differences in the magnitudes of pulmonary responses and gene regulation consistent with pathological alterations induced by exposures to four asbestos/asbestiform fibers examined. Further comparative mechanistic studies linking early responses with the long-term endpoints may be instrumental to understanding triggering mechanisms underlying pulmonary carcinogenesis, that is lung cancer versus mesothelioma.
Collapse
Affiliation(s)
| | - Elena R Kisin
- a Exposure Assessment Branch , NIOSH/CDC, Morgantown , WV , USA
| | - Dmitriy W Gutkin
- b Department of Pathology, University of Pittsburgh Medical Center , Pittsburgh , PA , USA
| | - Michael R Shurin
- b Department of Pathology, University of Pittsburgh Medical Center , Pittsburgh , PA , USA
| | - Martin Harper
- a Exposure Assessment Branch , NIOSH/CDC, Morgantown , WV , USA
- c Zefon International, Inc. , Ocala , FL , USA
| | - Anna A Shvedova
- a Exposure Assessment Branch , NIOSH/CDC, Morgantown , WV , USA
- d Department Physiology, Pharmacology & Neuroscience , School of Medicine, West Virginia University , Morgantown , WV , USA
- e Department of Pharmaceutical Sciences , School of Pharmacy, West Virginia University , Morgantown , WV , USA
| |
Collapse
|
5
|
Carbone M, Kanodia S, Chao A, Miller A, Wali A, Weissman D, Adjei A, Baumann F, Boffetta P, Buck B, de Perrot M, Dogan AU, Gavett S, Gualtieri A, Hassan R, Hesdorffer M, Hirsch FR, Larson D, Mao W, Masten S, Pass HI, Peto J, Pira E, Steele I, Tsao A, Woodard GA, Yang H, Malik S. Consensus Report of the 2015 Weinman International Conference on Mesothelioma. J Thorac Oncol 2017; 11:1246-1262. [PMID: 27453164 PMCID: PMC5551435 DOI: 10.1016/j.jtho.2016.04.028] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/31/2016] [Accepted: 04/26/2016] [Indexed: 01/31/2023]
Abstract
On November 9 and 10, 2015, the International Conference on Mesothelioma in Populations Exposed to Naturally Occurring Asbestiform Fibers was held at the University of Hawaii Cancer Center in Honolulu, Hawaii. The meeting was cosponsored by the International Association for the Study of Lung Cancer, and the agenda was designed with significant input from staff at the U.S. National Cancer Institute and National Institute of Environmental Health Sciences. A multidisciplinary group of participants presented updates reflecting a range of disciplinary perspectives, including mineralogy, geology, epidemiology, toxicology, biochemistry, molecular biology, genetics, public health, and clinical oncology. The group identified knowledge gaps that are barriers to preventing and treating malignant mesothelioma (MM) and the required next steps to address barriers. This manuscript reports the group’s efforts and focus on strategies to limit risk to the population and reduce the incidence of MM. Four main topics were explored: genetic risk, environmental exposure, biomarkers, and clinical interventions. Genetics plays a critical role in MM when the disease occurs in carriers of germline BRCA1 associated protein 1 mutations. Moreover, it appears likely that, in addition to BRCA1 associated protein 1, other yet unknown genetic variants may also influence the individual risk for development of MM, especially after exposure to asbestos and related mineral fibers. MM is an almost entirely preventable malignancy as it is most often caused by exposure to commercial asbestos or mineral fibers with asbestos-like health effects, such as erionite. In the past in North America and in Europe, the most prominent source of exposure was related to occupation. Present regulations have reduced occupational exposure in these countries; however, some people continue to be exposed to previously installed asbestos in older construction and other settings. Moreover, an increasing number of people are being exposed in rural areas that contain noncommercial asbestos, erionite, and other mineral fibers in soil or rock (termed naturally occurring asbestos [NOA]) and are being developed. Public health authorities, scientists, residents, and other affected groups must work together in the areas where exposure to asbestos, including NOA, has been documented in the environment to mitigate or reduce this exposure. Although a blood biomarker validated to be effective for use in screening and identifying MM at an early stage in asbestos/ NOA-exposed populations is not currently available, novel biomarkers presented at the meeting, such as high mobility group box 1 and fibulin-3, are promising. There was general agreement that current treatment for MM, which is based on surgery and standard chemotherapy, has a modest effect on the overall survival (OS), which remains dismal. Additionally, although much needed novel therapeutic approaches for MM are being developed and explored in clinical trials, there is a critical need to invest in prevention research, in which there is a great opportunity to reduce the incidence and mortality from MM.
Collapse
Affiliation(s)
- Michele Carbone
- Thoracic Oncology, University of Hawaii Cancer Center, Honolulu, Hawaii.
| | - Shreya Kanodia
- Thoracic Oncology, University of Hawaii Cancer Center, Honolulu, Hawaii; Samuel Oschin Comprehensive Cancer Institute and Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, California
| | - Ann Chao
- Center for Global Health, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Aubrey Miller
- National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
| | - Anil Wali
- Center to Reduce Cancer Health Disparities, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - David Weissman
- Respiratory Health Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia
| | | | | | - Paolo Boffetta
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Brenda Buck
- Department of Geoscience, University of Nevada Las Vegas, Las Vegas, Nevada
| | - Marc de Perrot
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - A Umran Dogan
- Chemical and Biochemical Engineering Department and Center for Global and Regional Environmental Research, University of Iowa, Iowa City, Iowa
| | - Steve Gavett
- Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, North Carolina
| | | | - Raffit Hassan
- Thoracic Oncology Branch, Center for Cancer Research, National Institutes of Health, Bethesda, Maryland
| | - Mary Hesdorffer
- Mesothelioma Applied Research Foundation, Alexandria, Virginia
| | - Fred R Hirsch
- University of Colorado Cancer Center, Denver, Colorado
| | - David Larson
- Thoracic Oncology, University of Hawaii Cancer Center, Honolulu, Hawaii
| | - Weimin Mao
- Cancer Research Institute, Zhejiang Cancer Hospital and Key Laboratory of Diagnosis and Treatment Technology on Thoracic Oncology of Zhejiang, Hangzhou, People's Republic of China
| | - Scott Masten
- National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
| | - Harvey I Pass
- Cardiothoracic Surgery, New York University Langone Medical Center, New York, New York
| | - Julian Peto
- Cancer Research UK, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Enrico Pira
- Department of Public Health and Pediatrics, University of Turin, Turin, Italy
| | - Ian Steele
- Notre Dame Integrated Imaging Facility, Notre Dame University, Notre Dame, Indiana
| | - Anne Tsao
- Department of Thoracic and Head and Neck Medical Oncology, Division of Cancer Medicine, The University of Texas M. D. Anderson Cancer Center, Houston, Texas
| | - Gavitt Alida Woodard
- Thoracic Surgery, University of California at San Francisco, San Francisco, California
| | - Haining Yang
- Thoracic Oncology, University of Hawaii Cancer Center, Honolulu, Hawaii
| | - Shakun Malik
- Cancer Therapy Evaluation Program, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| |
Collapse
|
6
|
Pfau JC, Buck B, Metcalf RV, Kaupish Z, Stair C, Rodriguez M, Keil DE. Comparative health effects in mice of Libby amphibole asbestos and a fibrous amphibole from Arizona. Toxicol Appl Pharmacol 2017; 334:24-34. [PMID: 28870655 DOI: 10.1016/j.taap.2017.08.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 07/26/2017] [Accepted: 08/31/2017] [Indexed: 11/27/2022]
Abstract
This project developed from studies demonstrating that Libby Amphibole Asbestos (LAA) causes a non-typical set of health outcomes not generally reported for asbestos, including systemic autoimmunity and an unusual and devastating lamellar pleural thickening that progresses to severe pulmonary dysfunction and death. Further, mineral fiber mixtures with some similarities to LAA have recently been discovered in southern Nevada and northwestern Arizona, where the material exists in extensive recreational areas and is present in yards, roads, parking lots and school yards. The objective was to compare the health outcomes in mice exposed to either LAA or the fibrous amphiboles collected in Arizona at the Lake Mead National Recreational Area at very low doses to represent environmental exposures. In this study, the fibrous amphibole asbestos sample from Arizona (AzA) is composed of winchite (69%), actinolite (22%), and non-amphibole minerals (9%) and has a mean aspect ratio of 16.7±0.9. Fibrous amphibole asbestos from Libby (LAA) is composed of winchite (70%), richterite (9%), tremolite (5%), and non-amphibole minerals (16%) with a mean aspect ratio of 8.4±0.7. C57BL/6 mice were exposed by oropharyngeal aspiration to fiber suspensions at a very low dose of 3μg/mouse. After seven months, both LAA- and AzA-exposed mice had indices of chronic immune dysfunction related to a TH17 cytokine profile, with B cell activation, autoantibody production and proteinuria, suggesting kidney involvement. In addition, both exposures led to significant lung and pleural fibrosis. These data suggest that there is risk of pulmonary disease and autoimmune outcomes with environmental exposure to amphibole asbestos, and that this is not limited to Libby, Montana.
Collapse
Affiliation(s)
- Jean C Pfau
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, USA.
| | - Brenda Buck
- Department of Geoscience, University of Nevada Las Vegas, Las Vegas, NV 89154, USA.
| | - Rodney V Metcalf
- Department of Geoscience, University of Nevada Las Vegas, Las Vegas, NV 89154, USA.
| | - Zoie Kaupish
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, USA
| | - Caleb Stair
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, USA
| | - Maria Rodriguez
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, USA
| | - Deborah E Keil
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT 59717, USA.
| |
Collapse
|
7
|
Gavett SH, Parkinson CU, Willson GA, Wood CE, Jarabek AM, Roberts KC, Kodavanti UP, Dodd DE. Persistent effects of Libby amphibole and amosite asbestos following subchronic inhalation in rats. Part Fibre Toxicol 2016; 13:17. [PMID: 27083413 PMCID: PMC4832450 DOI: 10.1186/s12989-016-0130-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 04/10/2016] [Indexed: 12/31/2022] Open
Abstract
Background Human exposure to Libby amphibole (LA) asbestos increases risk of lung cancer, mesothelioma, and non-malignant respiratory disease. This study evaluated potency and time-course effects of LA and positive control amosite (AM) asbestos fibers in male F344 rats following nose-only inhalation exposure. Methods Rats were exposed to air, LA (0.5, 3.5, or 25.0 mg/m3 targets), or AM (3.5 mg/m3 target) for 10 days and assessed for markers of lung inflammation, injury, and cell proliferation. Short-term results guided concentration levels for a stop-exposure study in which rats were exposed to air, LA (1.0, 3.3, or 10.0 mg/m3), or AM (3.3 mg/m3) 6 h/day, 5 days/week for 13 weeks, and assessed 1 day, 1, 3, and 18 months post-exposure. Fibers were relatively short; for 10 mg/m3 LA, mean length of all structures was 3.7 μm and 1 % were longer than 20 μm. Results Ten days exposure to 25.0 mg/m3 LA resulted in significantly increased lung inflammation, fibrosis, bronchiolar epithelial cell proliferation and hyperplasia, and inflammatory cytokine gene expression compared to air. Exposure to 3.5 mg/m3 LA resulted in modestly higher markers of acute lung injury and inflammation compared to AM. Following 13 weeks exposure, lung fiber burdens correlated with exposure mass concentrations, declining gradually over 18 months. LA (3.3 and 10.0 mg/m3) and AM produced significantly higher bronchoalveolar lavage markers of inflammation and lung tissue cytokines, Akt, and MAPK/ERK pathway components compared to air control from 1 day to 3 months post-exposure. Histopathology showed alveolar inflammation and interstitial fibrosis in all fiber-exposed groups up to 18 months post-exposure. Positive dose trends for incidence of alveolar epithelial hyperplasia and bronchiolar/alveolar adenoma or carcinoma were observed among LA groups. Conclusions Inhalation of relatively short LA fibers produced inflammatory, fibrogenic, and tumorigenic effects in rats which replicate essential attributes of asbestos-related disease in exposed humans. Fiber burden, inflammation, and activation of growth factor pathways may persist and contribute to lung tumorigenesis long after initial LA exposure. Fiber burden data are being used to develop a dosimetry model for LA fibers, which may provide insights on mode of action for hazard assessment. Electronic supplementary material The online version of this article (doi:10.1186/s12989-016-0130-z) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Stephen H Gavett
- National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA.
| | - Carl U Parkinson
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC, 27711, USA
| | - Gabrielle A Willson
- Experimental Pathology Laboratories, Inc. (EPL®), Research Triangle Park, NC, 27711, USA
| | - Charles E Wood
- National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Annie M Jarabek
- National Center for Environmental Assessment, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Kay C Roberts
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC, 27711, USA
| | - Urmila P Kodavanti
- National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Darol E Dodd
- The Hamner Institutes for Health Sciences, Research Triangle Park, NC, 27711, USA
| |
Collapse
|
8
|
Cyphert JM, McGee MA, Nyska A, Schladweiler MC, Kodavanti UP, Gavett SH. Long-term toxicity of naturally occurring asbestos in male Fischer 344 rats. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2016; 79:49-60. [PMID: 26818398 DOI: 10.1080/15287394.2015.1099123] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Naturally occurring asbestos (NOA) fibers are found in geologic deposits that may be disturbed by mining, earthworks, or natural processes, resulting in adverse health risks to exposed individuals. The toxicities of Libby amphibole and NOA samples including Sumas Mountain chrysotile (SM), El Dorado tremolite (ED), and Ontario ferroactinolite cleavage fragments (ON) were compared in male Fischer 344 (F344) rats 15 mo after exposure. Rat-respirable fractions of LA and SM displayed greater mean lengths and aspect ratios than ED and ON. After a single intratracheal (IT) instillation (0.5 or 1.5 mg/rat), persistent changes in ventilatory parameters and a significant increase in lung resistance at baseline and after methacholine aerosol dosing were found only in rats exposed to 1.5 mg SM. High-dose ED significantly elevated bronchoalveolar lavage lactate dehydrogenase (LDH) activity and protein levels, while high-dose SM increased γ-glutamyl transferase and LDH activities. A moderate degree of lung interstitial fibrosis after exposure to 1.5 mg SM persisted 15 mo after exposure, unchanged from previous findings at 3 mo. LA induced mild fibrosis, while ED and ON produced minimal and no apparent fibrosis, respectively. Bronchioloalveolar carcinoma was observed 15 mo after exposure to LA or ED. Data demonstrated that SM, given by bolus IT dosing on an equivalent mass basis, induced greater pulmonary function deficits, airway hyperresponsiveness, and interstitial fibrosis than other NOA, although unlike LA and ED, no apparent evidence for carcinogenicity was found. All NOA samples except ON cleavage fragments produced some degree of long-term toxicity.
Collapse
Affiliation(s)
- Jaime M Cyphert
- a Curriculum in Toxicology , University of North Carolina School of Medicine , Chapel Hill , North Carolina , USA
| | - Marie A McGee
- b Oak Ridge Institute for Science and Education , Oak Ridge , Tennessee , USA
| | - Abraham Nyska
- c National Institute of Environmental Health Sciences, National Institutes of Health , Research Triangle Park , North Carolina , USA
- d Sackler School of Medicine , Tel Aviv University , Timrat , Israel
| | - Mette C Schladweiler
- e Environmental Public Health Division , National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , North Carolina , USA
| | - Urmila P Kodavanti
- e Environmental Public Health Division , National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , North Carolina , USA
| | - Stephen H Gavett
- e Environmental Public Health Division , National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , North Carolina , USA
| |
Collapse
|
9
|
Andujar P, Lacourt A, Brochard P, Pairon JC, Jaurand MC, Jean D. Five years update on relationships between malignant pleural mesothelioma and exposure to asbestos and other elongated mineral particles. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2016; 19:151-172. [PMID: 27705546 DOI: 10.1080/10937404.2016.1193361] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Despite the reduction of global asbestos consumption and production due to the ban or restriction of asbestos uses in more than 50 countries since the 1970s, malignant mesothelioma remains a disease of concern. Asbestos is still used, imported, and exported in several countries, and the number of mesothelioma deaths may be expected to increase in the next decades in these countries. Asbestos exposure is the main risk factor for malignant pleural mesothelioma, but other types of exposures are linked to the occurrence of this type of cancer. Although recent treatments improve the quality of life of patients with mesothelioma, malignant pleural mesothelioma remains an aggressive disease. Recent treatments have not resulted in appreciable improvement in survival, and thus development of more efficient therapies is urgently needed. The development of novel therapeutic strategies is dependent on our level of knowledge of the physiopathological and molecular changes that mesothelial cells acquired during the neoplastic process. During the past 5 years, new findings have been published on the etiology, epidemiology, molecular changes, and innovative treatments of malignant pleural mesothelioma. This review aims to update the findings of recent investigations on etiology, epidemiology, and molecular changes with a focus on (1) attributable risk of asbestos exposure in men and women and (2) coexposure to other minerals and other elongated mineral particles or high aspect ratio nanoparticles. Recent data obtained on genomic and gene alterations, pathways deregulations, and predisposing factors are summarized.
Collapse
Affiliation(s)
- Pascal Andujar
- a Institut Santé Travail Paris-Est , Université Paris-Est , Créteil , France
- b CHI Créteil , Service de Pneumologie et Pathologie Professionnelle, DHU A-TVB , Créteil , France
- c INSERM U955 , Equipe 4 , Créteil , France
- d Universite Paris-Est Créteil , Faculté de Médecine , Créteil , France
| | - Aude Lacourt
- e INSERM U1219 , EPICENE , Bordeaux , France
- f ISPED , Université de Bordeaux , Bordeaux , France
| | - Patrick Brochard
- f ISPED , Université de Bordeaux , Bordeaux , France
- g CHU Bordeaux , Bordeaux , France
| | - Jean-Claude Pairon
- a Institut Santé Travail Paris-Est , Université Paris-Est , Créteil , France
- b CHI Créteil , Service de Pneumologie et Pathologie Professionnelle, DHU A-TVB , Créteil , France
- c INSERM U955 , Equipe 4 , Créteil , France
- d Universite Paris-Est Créteil , Faculté de Médecine , Créteil , France
| | - Marie-Claude Jaurand
- h INSERM , UMR-1162, Génomique fonctionnelle des tumeurs solides , Paris , France
- i Université Paris Descartes , Labex Immuno-Oncology , Sorbonne Paris Cité, Paris , France
- j Université Paris Diderot , IUH , Paris , France
- k Université Paris 13 , Sorbonne Paris Cité , Bobigny , France
| | - Didier Jean
- h INSERM , UMR-1162, Génomique fonctionnelle des tumeurs solides , Paris , France
- i Université Paris Descartes , Labex Immuno-Oncology , Sorbonne Paris Cité, Paris , France
- j Université Paris Diderot , IUH , Paris , France
- k Université Paris 13 , Sorbonne Paris Cité , Bobigny , France
| |
Collapse
|
10
|
Carlin DJ, Larson TC, Pfau JC, Gavett SH, Shukla A, Miller A, Hines R. Current Research and Opportunities to Address Environmental Asbestos Exposures. ENVIRONMENTAL HEALTH PERSPECTIVES 2015; 123:A194-7. [PMID: 26230287 PMCID: PMC4529018 DOI: 10.1289/ehp.1409662] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Asbestos-related diseases continue to result in approximately 120,000 deaths every year in the United States and worldwide. Although extensive research has been conducted on health effects of occupational exposures to asbestos, many issues related to environmental asbestos exposures remain unresolved. For example, environmental asbestos exposures associated with a former mine in Libby, Montana, have resulted in high rates of nonoccupational asbestos-related disease. Additionally, other areas with naturally occurring asbestos deposits near communities in the United States and overseas are undergoing investigations to assess exposures and potential health risks. Some of the latest public health, epidemiological, and basic research findings were presented at a workshop on asbestos at the 2014 annual meeting of the Society of Toxicology in Phoenix, Arizona. The following focus areas were discussed: a) mechanisms resulting in fibrosis and/or tumor development; b) relative toxicity of different forms of asbestos and other hazardous elongated mineral particles (EMPs); c) proper dose metrics (e.g., mass, fiber number, or surface area of fibers) when interpreting asbestos toxicity; d) asbestos exposure to susceptible populations; and e) using toxicological findings for risk assessment and remediation efforts. The workshop also featured asbestos research supported by the National Institute of Environmental Health Sciences, the Agency for Toxic Substances and Disease Registry, and the U.S. Environmental Protection Agency. Better protection of individuals from asbestos-related health effects will require stimulation of new multidisciplinary research to further our understanding of what constitutes hazardous exposures and risk factors associated with toxicity of asbestos and other hazardous EMPs (e.g., nanomaterials).
Collapse
Affiliation(s)
- Danielle J Carlin
- Division of Extramural Research and Training, National Institute of Environmental Health Sciences (NIEHS), National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Research Triangle Park, North Carolina, USA
| | | | | | | | | | | | | |
Collapse
|
11
|
Cyphert JM, Carlin DJ, Nyska A, Schladweiler MC, Ledbetter AD, Shannahan JH, Kodavanti UP, Gavett SH. Comparative long-term toxicity of Libby amphibole and amosite asbestos in rats after single or multiple intratracheal exposures. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2015; 78:151-165. [PMID: 25506632 DOI: 10.1080/15287394.2014.947455] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In former mine workers of Libby, MT, exposure to amphibole-containing vermiculite was linked to increased rates of asbestosis, lung cancer, and mesothelioma. Although many studies showed adverse effects following exposure to Libby amphibole (LA; a mixture of winchite, richterite, and tremolite), little is known regarding the relative toxicity of LA compared to regulated asbestos, or regarding the risks associated with acute high-dose exposures relative to repeated low-dose exposures. In this study, pulmonary function, inflammation, and pathology were assessed after single or multiple intratracheal (IT) exposures of LA or a well-characterized amosite (AM) control fiber with equivalent fiber characteristics. Male F344 rats were exposed to an equivalent total mass dose (0.15, 0.5, 1.5, or 5 mg/rat) of LA or AM administered either as a single IT instillation, or as multiple IT instillations given every other week over a 13-wk period, and necropsied up to 20 mo after the initial IT. When comparing the two fiber types, in both studies LA resulted in greater acute neutrophilic inflammation and cellular toxicity than equal doses of AM, but long-term histopathological changes were approximately equivalent between fibers, suggesting that LA is at least as toxic as AM. In addition, although no dose-response relationship was discerned, mesothelioma or lung carcinomas were found after exposure to low and high dose levels of LA or AM in both studies. Conversely, when comparing studies, an equal mass dose given over multiple exposures instead of a single bolus resulted in greater chronic pathological changes in lung at lower doses, despite the initially weaker acute inflammatory response. Overall, these results suggest that there is a possibility of greater long-term pathological changes with repeated lower LA dose exposures, which more accurately simulates chronic environmental exposures.
Collapse
Affiliation(s)
- Jaime M Cyphert
- a Curriculum in Toxicology , University of North Carolina School of Medicine , Chapel Hill , North Carolina , USA
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Wylie AG, Candela PA. Methodologies for determining the sources, characteristics, distribution, and abundance of asbestiform and nonasbestiform amphibole and serpentine in ambient air and water. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2015; 18:1-42. [PMID: 25825806 DOI: 10.1080/10937404.2014.997945] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Anthropogenic and nonanthropogenic (erosion) processes contribute to the continuing presence of asbestos and nonasbestos elongated mineral particles (EMP) of amphibole and serpentine in air and water of urban, rural, and remote environments. The anthropogenic processes include disturbance and deterioration of asbestos-containing materials, mining of amphibole- and serpentine-bearing rock, and disturbance of soils containing amphibole and serpentine. Atmospheric dispersal processes can transport EMP on a global scale. There are many methods of establishing the abundance of EMP in air and water. EMP include cleavage fragments, fibers, asbestos, and other asbestiform minerals, and the methods employed do not critically distinguish among them. The results of most of the protocols are expressed in the common unit of fibers per square centimeter; however, seven different definitions for the term "fiber" are employed and the results are not comparable. The phase-contrast optical method used for occupational monitoring cannot identify particles being measured, and none of the methods distinguish amphibole asbestos from other EMP of amphibole. Measured ambient concentrations of airborne EMP are low, and variance may be high, even for similar environments, yielding data of questionable value for risk assessment. Calculations based on the abundance of amphibole-bearing rock and estimates of asbestos in the conterminous United States suggest that amphibole may be found in 6-10% of the land area; nonanthropogenic erosional processes might produce on the order of 400,000 tons or more of amphibole per year, and approximately 50 g asbestos/km(2)/yr; and the order of magnitude of the likelihood of encountering rock bearing any type of asbestos is approximately 0.0001.
Collapse
Affiliation(s)
- Ann G Wylie
- a Laboratory for Mineral Deposits Research, Department of Geology , University of Maryland , College Park , Maryland , USA
| | | |
Collapse
|
13
|
Abstract
Despite a body of evidence supporting an association between asbestos exposure and autoantibodies indicative of systemic autoimmunity, such as antinuclear antibodies (ANA), a strong epidemiological link has never been made to specific autoimmune diseases. This is in contrast with another silicate dust, crystalline silica, for which there is considerable evidence linking exposure to diseases such as systemic lupus erythematosus, systemic sclerosis, and rheumatoid arthritis. Instead, the asbestos literature is heavily focused on cancer, including mesothelioma and pulmonary carcinoma. Possible contributing factors to the absence of a stronger epidemiological association between asbestos and autoimmune disease include (a) a lack of statistical power due to relatively small or diffuse exposure cohorts, (b) exposure misclassification, (c) latency of clinical disease, (d) mild or subclinical entities that remain undetected or masked by other pathologies, or (e) effects that are specific to certain fiber types, so that analyses on mixed exposures do not reach statistical significance. This review summarizes epidemiological, animal model, and in vitro data related to asbestos exposures and autoimmunity. These combined data help build toward a better understanding of the fiber-associated factors contributing to immune dysfunction that may raise the risk of autoimmunity and the possible contribution to asbestos-related pulmonary disease.
Collapse
|
14
|
Kodavanti UP, Andrews D, Schladweiler MC, Gavett SH, Dodd DE, Cyphert JM. Early and delayed effects of naturally occurring asbestos on serum biomarkers of inflammation and metabolism. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2014; 77:1024-1039. [PMID: 25072823 DOI: 10.1080/15287394.2014.899171] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Studies recently showed that intratracheal (IT) instillation of Libby amphibole (LA) increases circulating acute-phase proteins (APP; α-2 macroglobulin, A2M; and α-1 acid glycoprotein, AGP) and inflammatory biomarkers (osteopontin and lipocalin) in rats. In this study, objectives were to (1) compare changes in biomarkers of rats after instillation of different naturally occurring asbestos (NOA) minerals including LA, Sumas Mountain chrysotile (SM), El Dorado Hills tremolite (ED), and Ontario ferroactinolite cleavage fragments (ON), and (2) examine biomarkers after subchronic LA or amosite inhalation exposure. Rat-respirable fractions (aerodynamic diameter approximately 2.5 μm) prepared by water elutriation were delivered via a single IT instillation at doses of 0, 0.5, and 1.5 mg/rat in male F344 rats. Nose-only inhalation exposures were performed at 0, 1, 3.3, and 10 mg/m(3) for LA and at 3.3 mg /m(3) for amosite, 6h/d, 5 d/wk for 13 wk. Inflammation, metabolic syndrome, and cancer biomarkers were analyzed in the serum for up to 18 mo. IT instillation of some asbestos materials significantly increased serum AGP and A2M but to a varying degree (SM = LA > ON = ED). Numerical increases in interleukin (IL)-6 and osteopontin occurred in rats instilled with SM. SM and ED also elevated leptin and insulin at 15 mo, suggesting potential metabolic effects. LA inhalation tended to raise A2M at d 1 but not cytokines. Serum mesothelin appeared to elevate after 18 mo of LA inhalation. These results suggest that the lung injury induced by high levels of asbestos materials may be associated with systemic inflammatory changes and predisposition to insulin resistance.
Collapse
Affiliation(s)
- Urmila P Kodavanti
- a Cardiopulmonary and Immunotoxicology Branch, Environmental Public Health Division , National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency , Research Triangle Park , North Carolina , USA
| | | | | | | | | | | |
Collapse
|