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Blanco-Pérez J, Salgado-Barreira Á, Blanco-Dorado S, González Bello ME, Caldera Díaz AC, Pérez-Gonzalez A, Pallarés Sanmartín A, Fernández Villar A, Gonzalez-Barcala FJ. Clinical usefulness of serum angiotensin converting enzyme in silicosis. Pulmonology 2024; 30:370-377. [PMID: 36280590 DOI: 10.1016/j.pulmoe.2022.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 06/07/2022] [Accepted: 06/07/2022] [Indexed: 06/16/2023] Open
Abstract
INTRODUCTION Silicosis is an irreversible and incurable disease. Preventive measures to eliminate exposure are the only effective way to reduce morbidity and mortality. In such situations, having a biomarker for early diagnosis or to predict evolution would be very useful in order to improve control of the disease. The elevation of serum angiotensin-converting enzyme (sACE) in silicosis has been described in previous studies, although its relationship with severity and prognosis is not clear. AIMS To determine the levels of sACE in a cohort of patients with exposure to silica dust with and without silicosis, and to assess their impact on the prognosis of the aforementioned patients. METHOD Prospective observational study on patients treated in a silicosis clinic from 2009 to 2018. sACE levels and pulmonary function tests were performed. Radiological progression was assessed in patients who had already had 2 X-rays of the thorax and / or two CT scans with at least a 1-year interval, from the time of inclusion in the study. RESULTS A total of 413 cases of silicosis were confirmed, as well as 73 with exposure to silica dust but without silicosis. The mean sACE level for healthy subjects was 27.5±7.3U/L, for exposed patients without silicosis it was 49.6±24.2U/L, for simple silicosis it was 57.8±31,3U/L and for complicated silicosis it was 74.5±38.6U/L. Patients with a higher sACE generally progressed radiologically during follow-up (73.3±38.0 vs. 60.4±33.7; p<.001) and so the category of silicosis changed (73,9±38.1 vs. 62.5±34.6; p<.021). CONCLUSIONS sACE was elevated in patients with silicosis, and the greater its severity, the higher it was, which is associated with disease progression measured radiologically or as a category change of silicosis.
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Affiliation(s)
- J Blanco-Pérez
- Pneumology Department, University Hospital Complex of Vigo, Spain..
| | - Á Salgado-Barreira
- Department of Preventive Medicine and Public Health, University of Santiago de Compostela, Santiago de Compostela, Spain.; Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.; Consortium for Biomedical Research in Epidemiology and Public Health (CIBER en Epidemiología y Salud Pública-CIBERESP), Carlos III Health Institute, Madrid, Spain..
| | - S Blanco-Dorado
- Pharmacy Department, University Hospital Complex of Santiago de Compostela, Spain
| | | | - A C Caldera Díaz
- Radiology Department, University Hospital Complex of Vigo, Spain
| | - A Pérez-Gonzalez
- Internal Medicine Department, University Hospital Complex of Vigo, Spain
| | | | | | - F J Gonzalez-Barcala
- Pneumology Department, University Hospital Complex of Vigo, Spain.; Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.; Pneumology Department, University Hospital Complex of Santiago de Compostela; Spanish Biomedical Research Networking Centre-CIBERES, Spain
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Gandhi SA, Heinzerling A, Flattery J, Fazio JC, Alam A, Cummings KJ, Harrison RJ. Active Surveillance of Engineered Stone Workers Facilitates Early Identification of Silicosis: A Discussion of Surveillance of Occupational Lung Diseases. New Solut 2023; 33:119-129. [PMID: 37649363 PMCID: PMC11268947 DOI: 10.1177/10482911231189503] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Silicosis in workers exposed to respirable crystalline silica while fabricating engineered stone products is an emerging respiratory health issue. We describe silicosis in engineered stone workers in California and examine clinical features by the source of identification. Cases were identified passively using hospital-based patient discharge data or actively through outreach and medical testing following enforcement investigation. Outcomes were examined based on the source of case identification. We identified 18 cases diagnosed between 2006 and 2020. Cases identified passively compared to other identification methods were associated with lower percent predicted forced vital capacity (FVC) (P ≤ .01), forced expiratory volume in 1 s (FEV1) (P ≤ .01), and diffusing capacity of the lungs for carbon monoxide (DLCO) (P < .01) at the time of diagnosis and were more likely to be identified following death or lung transplant (P = .01). Our experience demonstrates delays in diagnosis and case identification when relying on passive surveillance methods. Enhanced public health surveillance systems can improve the early detection of occupational lung disease and inform future prevention policies.
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Affiliation(s)
- Sheiphali A. Gandhi
- Division of Occupational and Environmental Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Amy Heinzerling
- California Department of Public Health, Occupational Health Branch, Richmond, CA, USA
| | - Jennifer Flattery
- California Department of Public Health, Occupational Health Branch, Richmond, CA, USA
| | - Jane C. Fazio
- Division of Pulmonary, Critical Care and Sleep Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Asim Alam
- California Pacific Medical Center, Division of Pulmonary and Critical Care Medicine, San Francisco, CA, USA
| | - Kristin J. Cummings
- California Department of Public Health, Occupational Health Branch, Richmond, CA, USA
| | - Robert J. Harrison
- California Department of Public Health, Occupational Health Branch, Richmond, CA, USA
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Xuan W, Zheng L, Bunes BR, Crane N, Zhou F, Zang L. Engineering solutions to breath tests based on an e-nose system for silicosis screening and early detection in miners. J Breath Res 2022; 16. [PMID: 35303733 DOI: 10.1088/1752-7163/ac5f13] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 03/18/2022] [Indexed: 11/11/2022]
Abstract
OBJECTIVES This study aims to develop an engineering solution to breath tests using an electronic nose (e-nose), and evaluate its diagnosis accuracy for silicosis. Influencing factors of this technique were explored. METHODS 398 non-silicosis miners and 221 silicosis miners were enrolled in this cross-sectional study. Exhaled breath was analyzed by an array of 16 organic nanofiber sensors along with a customized sample processing system. Principal Component Analysis was used to visualize the breath data, and classifiers were trained by two improved cost-sensitive ensemble algorithms (RF and XGBoost) and two classical algorithms (KNN and SVM). All subjects were included to train the screening model, and an early detection model was run with silicosis cases in stage I. Both 5-fold cross-validation and external validation were adopted. Difference in classifiers caused by algorithms and subjects was quantified using a two-factor analysis of variance. The association between personal smoking habits and classification was investigated by the chi-square test. RESULTS Classifiers of ensemble learning performed well in both screening and early detection model, with an accuracy range of 0.817 to 0.987. Classical classifiers showed relatively worse performance. Besides, the ensemble algorithm type and silicosis cases inclusion had no significant effect on classification (p>0.05). There was no connection between personal smoking habits and classification accuracy. CONCLUSION Breath tests based on an e-nose consisted of 16x sensor array performed well in silicosis screening and early detection. Raw data input showed a more significant effect on classification compared with the algorithm. Personal smoking habits had little impact on models, supporting the applicability of models in large-scale silicosis screening. The e-nose technique and the breath analysis methods reported are expected to provide a quick and accurate screening for silicosis, and extensible for other diseases.
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Affiliation(s)
- Wufan Xuan
- China University of Mining and Technology, School of Safety Engineering, Xuzhou, 221116, CHINA
| | - Lina Zheng
- China University of Mining and Technology, School of Safety Engineering, Xuzhou, 221116, CHINA
| | - Benjamin R Bunes
- Vaporsens, Inc, 419 Wakara Way, Salt Lake City, Utah, 84108, UNITED STATES
| | - Nichole Crane
- Vaporsens, Inc, 419 Wakara Way, Salt Lake City, Utah, UT 84108, UNITED STATES
| | - Fubao Zhou
- China University of Mining and Technology, School of Safety Engineering, Xuzhou, 221116, CHINA
| | - Ling Zang
- Nano Institute of Utah, 36 South Wasatch Drive, Salt Lake City, Utah, 84112-8924, UNITED STATES
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Blanco-Pérez JJ, Arnalich-Montiel V, Salgado-Barreira Á, Alvarez-Moure MA, Caldera-Díaz AC, Melero-Gonzalez R, Pallarés-Sanmartín A, Fernandez-Villar A, González-Barcala FJ. Prevalence and clinical impact of systemic autoimmune rheumatic disease in patients with silicosis. Arch Bronconeumol 2021; 57:571-576. [PMID: 35702913 DOI: 10.1016/j.arbr.2021.06.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 04/16/2020] [Indexed: 06/15/2023]
Abstract
BACKGROUND Silicosis is associated with an increased risk of developing systemic autoimmune rheumatic disease (SARD). The prognostic implications of this association are poorly characterized. The aim of this study was to determine the prevalence of SARD and autoimmune markers in a cohort of patients with exposure to silica and assess their impact on prognosis. METHOD We performed a prospective observational study of all patients attending the dedicated silicosis clinic of our pulmonology unit between 2009 and December 2017. Diagnosis was confirmed by a rheumatologist according to Spanish Rheumatology Society criteria. Autoimmune markers, pulmonary function tests, radiological progression, visits to the emergency department and primary care center, and hospital admissions for respiratory causes, and mortality were analyzed. RESULTS Overall, 489 cases of silicosis and 95 cases of exposure were studied. In total, 54 (11.0%) patients with silicosis had SARD: 12 (2.4%) rheumatoid arthritis, 10 (2.0%) systemic lupus erythematosus, 10 (2.0%) systemic sclerosis, 3 (0.6%) Sjögren syndrome, 2 (0.4%) vasculitis associated with anti-neutrophil cytoplasmic antibodies (ANCA +), 6 (1.2%) psoriatic arthritis, 3 (0.6%) ankylosing spondylitis, and 8 (1.6%) other autoimmune diseases with no special features. The patients with SARD visited the emergency room more often (63.0% vs. 42.5%; p = 0.004), and progressed more rapidly (22.2 vs. 11.7%; p = 0.030). CONCLUSIONS The presence of systemic rheumatic autoimmune diseases involves radiological progression and a higher clinical impact.
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Affiliation(s)
- José Jesús Blanco-Pérez
- Servicio de Neumoloxía, Hospital Álvaro Cunqueiro, Complexo Hospitalario Universitario de Vigo, Spain; IRIDIS Group (Investigation in Rheumatology and Immuno-Mediated Diseases) del Instituto de Investigación Sanitaria Galicia Sur, Vigo, Spain.
| | - Victoria Arnalich-Montiel
- Servicio de Neumoloxía, Hospital Álvaro Cunqueiro, Complexo Hospitalario Universitario de Vigo, Spain
| | - Ángel Salgado-Barreira
- Unidad de Metodología y Estadística, Instituto de Investigación Sanitaria Galicia Sur, Vigo, Spain
| | - María Angel Alvarez-Moure
- Servicio de Radiología, Hospital Álvaro Cunqueiro, Complexo Hospitalario Universitario de Vigo, Spain
| | | | - Rafael Melero-Gonzalez
- Servicio de Reumatología, Hospital Álvaro Cunqueiro de Vigo, Complexo Hospitalario Universitario de Vigo, Spain
| | - Abel Pallarés-Sanmartín
- Servicio de Neumoloxía, Hospital Álvaro Cunqueiro, Complexo Hospitalario Universitario de Vigo, Spain
| | - Alberto Fernandez-Villar
- Servicio de Neumoloxía, Hospital Álvaro Cunqueiro, Complexo Hospitalario Universitario de Vigo, Spain
| | - Francisco Javier González-Barcala
- Servicio de Neumoloxía, Complexo Hospitalario Universitario de Santiago de Compostela, Spanish Biomedical Research Networking Centre-CIBERES, A Coruña, Spain
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Progression in the Management of Non-Idiopathic Pulmonary Fibrosis Interstitial Lung Diseases, Where Are We Now and Where We Would Like to Be. J Clin Med 2021; 10:jcm10061330. [PMID: 33807034 PMCID: PMC8004662 DOI: 10.3390/jcm10061330] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/05/2021] [Accepted: 03/15/2021] [Indexed: 12/19/2022] Open
Abstract
A significant proportion of patients with interstitial lung disease (ILD) may develop a progressive fibrosing phenotype characterized by worsening of symptoms and pulmonary function, progressive fibrosis on chest computed tomography and increased mortality. The clinical course in these patients mimics the relentless progressiveness of idiopathic pulmonary fibrosis (IPF). Common pathophysiological mechanisms such as a shared genetic susceptibility and a common downstream pathway—self-sustaining fibroproliferation—support the concept of a progressive fibrosing phenotype, which is applicable to a broad range of non-IPF ILDs. While antifibrotic drugs became the standard of care in IPF, immunosuppressive agents are still the mainstay of treatment in non-IPF fibrosing ILD (F-ILD). However, recently, randomized placebo-controlled trials have demonstrated the efficacy and safety of antifibrotic treatment in systemic sclerosis-associated F-ILD and a broad range of F-ILDs with a progressive phenotype. This review summarizes the current pharmacological management and highlights the unmet needs in patients with non-IPF ILD.
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Hoy RF, Glass DC, Dimitriadis C, Hansen J, Hore-Lacy F, Sim MR. Identification of early-stage silicosis through health screening of stone benchtop industry workers in Victoria, Australia. Occup Environ Med 2020; 78:296-302. [PMID: 33115923 DOI: 10.1136/oemed-2020-106897] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/21/2020] [Accepted: 10/02/2020] [Indexed: 01/19/2023]
Abstract
OBJECTIVES The popularity of high silica content artificial stone has been associated with emergence of severe, progressive silicosis as a major health issue affecting workers in the stone benchtop industry. This population-based health assessment programme has been implemented with the aim of identifcation of silica-associated disease at a preclinical stage. METHODS All current and former workers from the stone benchtop industry in the State of Victoria are offered free health assessments. Primary evaluations include a standardised questionnaire, physical examination, spirometry and gas transfer assessment and International Labour Organisation-categorised chest X-ray. Secondary evaluations include high-resolution CT chest, blood tests and a respiratory physician evaluation. RESULTS At the end of the first 12 months, 86/239 (36%) workers who had completed secondary evaluation were diagnosed with silicosis (65 simple silicosis and 21 complicated silicosis). 22 had worked in the industry for less than 10 years at the time of diagnosis. Of those with simple silicosis, 80% of workers reported breathlessness only with strenuous exercise (modified Medical Research Council score of 0), and lung function was well preserved (prebronchodilator forced vital capacity mean 99.8% predicted (SD 13.6), diffusion capacity of the lung for carbon monoxide mean 96.2% predicted (SD 18.0)). Antinuclear antibodies were detected in 37% with silicosis and 24% without silicosis. CONCLUSION Early results from this comprehensive health assessment programme have indicated a high proportion of referred artificial stone benchtop workers have silicosis, including many with early-stage disease. The common finding of antinuclear antibodies suggest significant potential for autoimmune disease in this occupational group.
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Affiliation(s)
- Ryan F Hoy
- School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing and Health Sciences. Monash University, Melbourne, Victoria, Australia
| | - Deborah C Glass
- School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing and Health Sciences. Monash University, Melbourne, Victoria, Australia
| | - Christina Dimitriadis
- School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing and Health Sciences. Monash University, Melbourne, Victoria, Australia
| | - Jessy Hansen
- School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing and Health Sciences. Monash University, Melbourne, Victoria, Australia
| | - Fiona Hore-Lacy
- School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing and Health Sciences. Monash University, Melbourne, Victoria, Australia
| | - Malcolm R Sim
- School of Public Health and Preventive Medicine, Faculty of Medicine, Nursing and Health Sciences. Monash University, Melbourne, Victoria, Australia
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León-Jiménez A, Hidalgo-Molina A, Conde-Sánchez MÁ, Pérez-Alonso A, Morales-Morales JM, García-Gámez EM, Córdoba-Doña JA. Artificial Stone Silicosis. Chest 2020; 158:1060-1068. [DOI: 10.1016/j.chest.2020.03.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 02/26/2020] [Accepted: 03/01/2020] [Indexed: 11/30/2022] Open
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8
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Blanco Pérez JJ, Arnalich Montiel V, Salgado-Barreira Á, Alvarez Moure MA, Caldera Díaz AC, Melero Gonzalez R, Pallarés Sanmartín A, Fernandez Villar A, González Barcala FJ. Prevalence and Clinical Impact of Systemic Autoimmune Rheumatic Disease in Patients with Silicosis. Arch Bronconeumol 2020; 57:S0300-2896(20)30129-0. [PMID: 32493645 DOI: 10.1016/j.arbres.2020.04.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 04/15/2020] [Accepted: 04/16/2020] [Indexed: 01/09/2023]
Abstract
BACKGROUND Silicosis is associated with an increased risk of developing systemic autoimmune rheumatic disease (SARD). The prognostic implications of this association are poorly characterized. The aim of this study was to determine the prevalence of SARD and autoimmune markers in a cohort of patients with exposure to silica and assess their impact on prognosis. METHOD We performed a prospective observational study of all patients attending the dedicated silicosis clinic of our pulmonology unit between 2009 and December 2017. Diagnosis was confirmed by a rheumatologist according to Spanish Rheumatology Society criteria. Autoimmune markers, pulmonary function tests, radiological progression, visits to the emergency department and primary care center, and hospital admissions for respiratory causes, and mortality were analyzed. RESULTS Overall, 489 cases of silicosis and 95 cases of exposure were studied. In total, 54 (11.0%) patients with silicosis had SARD: 12 (2.4%) rheumatoid arthritis, 10 (2.0%) systemic lupus erythematosus, 10 (2.0%) systemic sclerosis, 3 (0.6%) Sjögren syndrome, 2 (0.4%) vasculitis associated with anti-neutrophil cytoplasmic antibodies (ANCA +), 6 (1.2%) psoriatic arthritis, 3 (0.6%) ankylosing spondylitis, and 8 (1.6%) other autoimmune diseases with no special features. The patients with SARD visited the emergency room more often (63.0 vs. 42.5%; p = 0.004), and progressed more rapidly (22.2 vs. 11.7%; p = 0.030). CONCLUSIONS The presence of systemic rheumatic autoimmune diseases involves radiological progression and a higher clinical impact.
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Affiliation(s)
- José Jesús Blanco Pérez
- Servicio de Neumoloxía. Hospital Álvaro Cunqueiro. Complexo Hospitalario Universitario de Vigo, España; IRIDIS Group (Investigation in Rheumatology and Immuno-Mediated Diseases) del Instituto de Investigación Sanitaria Galicia Sur, Vigo, España.
| | - Victoria Arnalich Montiel
- Servicio de Neumoloxía. Hospital Álvaro Cunqueiro. Complexo Hospitalario Universitario de Vigo, España
| | - Ángel Salgado-Barreira
- Unidad de Metodología y Estadística. Instituto de Investigación Sanitaria Galicia Sur, Vigo, España
| | - María Angel Alvarez Moure
- Servicio de Radiología. Hospital Álvaro Cunqueiro. Complexo Hospitalario Universitario de Vigo, España
| | | | - Rafael Melero Gonzalez
- Servicio de Reumatología. Hospital Álvaro Cunqueiro de Vigo. Complexo Hospitalario Universitario de Vigo, España
| | - Abel Pallarés Sanmartín
- Servicio de Neumoloxía. Hospital Álvaro Cunqueiro. Complexo Hospitalario Universitario de Vigo, España
| | - Alberto Fernandez Villar
- Servicio de Neumoloxía. Hospital Álvaro Cunqueiro. Complexo Hospitalario Universitario de Vigo, España
| | - Francisco Javier González Barcala
- Servicio de Neumoloxía. Complexo Hospitalario Universitario de Santiago de Compostela; Spanish Biomedical Research Networking Centre-CIBERES, A Coruña, España
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Barnes H, Goh NSL, Leong TL, Hoy R. Silica-associated lung disease: An old-world exposure in modern industries. Respirology 2019; 24:1165-1175. [PMID: 31517432 DOI: 10.1111/resp.13695] [Citation(s) in RCA: 164] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 08/19/2019] [Accepted: 08/20/2019] [Indexed: 12/31/2022]
Abstract
Despite silica dust exposure being one of the earliest recognized causes of lung disease, Australia, USA, Israel, Turkey and other countries around the world have recently experienced significant outbreaks of silicosis. These outbreaks have occurred in modern industries such as denim jean production, domestic benchtop fabrication and jewellery polishing, where silica has been introduced without recognition and control of the hazard. Much of our understanding of silica-related lung disease is derived from traditional occupations such as mining, whereby workers may develop slowly progressive chronic silicosis. However, workers in modern industries are developing acute and accelerated silicosis over a short period of time, due to high-intensity silica concentrations, oxidative stress from freshly fractured silica and a rapid pro-inflammatory and pro-fibrotic response. Appropriate methods of screening and diagnosis remain unclear in these workers, and a significant proportion may go on to develop respiratory failure and death. There are no current effective treatments for silicosis. For those with near fatal respiratory failure, lung transplantation remains the only option. Strategies to reduce high-intensity silica dust exposure, enforced screening programmes and the identification of new treatments are urgently required.
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Affiliation(s)
- Hayley Barnes
- Department of Respiratory Medicine, Alfred Hospital, Melbourne, VIC, Australia.,Department of Respiratory Medicine, Austin Hospital, Melbourne, VIC, Australia.,Institute for Breathing and Sleep, Melbourne, VIC, Australia
| | - Nicole S L Goh
- Department of Respiratory Medicine, Alfred Hospital, Melbourne, VIC, Australia.,Department of Respiratory Medicine, Austin Hospital, Melbourne, VIC, Australia.,Institute for Breathing and Sleep, Melbourne, VIC, Australia
| | - Tracy L Leong
- Department of Respiratory Medicine, Austin Hospital, Melbourne, VIC, Australia.,Institute for Breathing and Sleep, Melbourne, VIC, Australia
| | - Ryan Hoy
- Department of Medicine, University of Melbourne, Melbourne, VIC, Australia.,Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia
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Karataş M, Gündüzöz M, Büyükşekerci M, Özakıncı OG, Nadir Öziş T. Radiological progression and lung function decrements among silica-exposed ceramic workers: a longitudinal study. Inhal Toxicol 2019; 31:119-124. [DOI: 10.1080/08958378.2019.1613459] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Mevlüt Karataş
- Department of Chest Diseases, Occupational and Environmental Diseases Hospital, Ankara, Turkey
| | - Meşide Gündüzöz
- Department of Family Medicine, Occupational and Environmental Diseases Hospital, Ankara, Turkey
| | - Murat Büyükşekerci
- Department of Pharmacology, Occupational and Environmental Diseases Hospital, Ankara, Turkey
| | - Osman Gökhan Özakıncı
- Department of Public Health, Occupational and Environmental Diseases Hospital, Ankara, Turkey
| | - Türkan Nadir Öziş
- Department of Chest Diseases, Occupational and Environmental Diseases Hospital, Ankara, Turkey
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Tsuchiya K, Toyoshima M, Akiyama N, Kono M, Nakamura Y, Funai K, Baba S, Sugimura H, Kanayama H, Suda T. Rapid Radiologic Progression of Silicosis. Am J Respir Crit Care Med 2017; 195:e39-e42. [PMID: 28339287 DOI: 10.1164/rccm.201606-1194im] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Kazuo Tsuchiya
- 1 Department of Respiratory Medicine, Hamamatsu Rosai Hospital, Hamamatsu, Japan
| | - Mikio Toyoshima
- 1 Department of Respiratory Medicine, Hamamatsu Rosai Hospital, Hamamatsu, Japan
| | | | | | | | | | | | - Haruhiko Sugimura
- 5 Department of Tumor Pathology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hitomi Kanayama
- 6 Division of Environmental Health, Department of International and Social Medicine, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
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12
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Re: Occupational Diesel Exposure, Duration of Employment, and Lung Cancer: An Application of the Parametric G-Formula. Epidemiology 2017. [PMID: 28639976 DOI: 10.1097/ede.0000000000000701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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CT Quantification of Large Opacities and Emphysema in Silicosis: Correlations among Clinical, Functional, and Radiological Parameters. Lung 2014; 192:543-51. [DOI: 10.1007/s00408-014-9590-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 04/21/2014] [Indexed: 10/25/2022]
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14
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A longitudinal study on lung disease in dental technicians: what has changed after seven years? Int J Occup Med Environ Health 2014; 26:693-701. [PMID: 24254651 DOI: 10.2478/s13382-013-0140-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 09/05/2013] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVES The aim of this 7-year follow-up study was to determine respiratory changes in dental technicians. MATERIAL AND METHODS In our region, in the year 2005, 36 dental technicians were evaluated with a cross-sectional study on respiratory occupational diseases, and in 2012 we evaluated them again. Inclusion of information on respiratory symptoms and demographic features questionnaires was applied. Pulmonary function tests (PFT) were performed. Chest X-rays (CXR) were evaluated according to the ILO-2000 classification. For the comparisons of the technicians' findings in 2005 and 2012, data analyses were performed with the Wilcoxon test in addition to descriptive statistical procedures. RESULTS In 2012, 19 out of the 36 technicians continued to work in the same place, so we were able to evaluate their findings. The prevalence of respiratory symptoms in dental technician was as follows: dyspnea 7 (37%), cough 6 (32%), and phlegm 5 (26%). According to ILO classifications in 2005, among the 36 technicians, 5 (13.8%) had pneumoconiosis. At the end of 7 years, there were 9 pneumoconiosis cases among the 19 remaining technicians (47%). Thus, there was a statistically significant progression on the profusion of the radiologic findings (p < 0.005). Also there was a significant worsening on spirometric findings (p < 0.05). CONCLUSION In dental technicians, a determination of both radiologic and functional progressions at the end of 7 years demonstrate that the primary and secondary preventive measures are necessary for these workplaces. Workplaces must be regularly controlled for worker health and hygiene.
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Dumavibhat N, Matsui T, Hoshino E, Rattanasiri S, Muntham D, Hirota R, Eitoku M, Imanaka M, Muzembo BA, Ngatu NR, Kondo S, Hamada N, Suganuma N. Radiographic progression of silicosis among Japanese tunnel workers in Kochi. J Occup Health 2013; 55:142-8. [PMID: 23485572 DOI: 10.1539/joh.12-0258-oa] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE The aim of our study was to investigate the natural course of silicosis in terms of radiographic progression among Japanese tunnel workers. METHODS Tunnel workers with silicosis were included in our study between January 2008 and June 2011. We retrospectively assessed workers' radiographs from their first through last visits to see whether there was progression. All films were interpreted by two physicians, who had been specially trained in using the ILO (2000) International Classification of Radiographs of Pneumoconioses (ILO/ICRP). We classified the radiographic findings according to the ILO/ICRP. Survival analysis was performed and then presented as time to progression. Subgroup analysis among the progressed group was performed to demonstrate duration of progression. RESULTS A total of 65 patients, who were no longer exposed to silica for the duration of the study, were included. The mean age at the first visit was 58.60 ± 7.10 years. The incidence rate of progression was 42 per 1,000 person-years with a median time to progression of 17 years. Progression was demonstrated among 33 cases (51%). The mean durations of progression from category 1 to category 4 and category 2 to category 4 were 14.55 and 10.65 years, respectively. Most patients (86%) had radiographic change from category 1 or 2 directly to category 4. CONCLUSION Silicosis progressed at a relatively high rate among tunnel workers without further silica exposure. The high probability of progression directly from category 1 to category 4 may lead to further investigation for the improvement of disease prevention.
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Kimura K, Ohtsuka Y, Kaji H, Nakano I, Sakai I, Itabashi K, Igarashi T, Okamoto K. Progression of pneumoconiosis in coal miners after cessation of dust exposure: a longitudinal study based on periodic chest X-ray examinations in Hokkaido, Japan. Intern Med 2010; 49:1949-56. [PMID: 20847497 DOI: 10.2169/internalmedicine.49.2990] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND The progression rate of pneumoconiosis in retired coal miners over ten years has not been studied in Japan. METHODS A retrospective longitudinal study was undertaken using chest X-rays of 1091 pneumoconiosis subjects in Hokkaido, Japan between 1985 and 2005. RESULTS The final numbers of subjects were 207 (19% of the entry) after 1 decade and 85 (8%) after 2 decades. Sixty-two percent of 207 subjects after 1 decade and 29% of 85 showed progression in 2 decades. Thirty-one percent of ILO category 1 and 55% of category 2 subjects showed progression to complicated pneumoconiosis after 1 decade, and 6% (4 of 64) of category 1 and 6% (5 of 77) of category 2 subjects progressed to complicated pneumoconiosis during 2 decades. CONCLUSION The progression of pneumoconiosis was observed after the cessation of dust exposure, especially during the first 10 years.
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Affiliation(s)
- Kiyonobu Kimura
- Clinical Research Center for Pneumoconiosis, Hokkaido Chuo Rosai Hospital (Workmen's Accident Compensation Hospital), Japan Labor Health and Welfare Organization, Iwamizawa.
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Mohebbi I, Zubeyri T. Radiological Progression and Mortality among Silica Flour Packers: A Longitudinal Study. Inhal Toxicol 2008; 19:1011-7. [DOI: 10.1080/08958370701533517] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Yang H, Yang L, Zhang J, Chen J. Natural course of silicosis in dust-exposed workers. ACTA ACUST UNITED AC 2008; 26:257-60. [PMID: 16850763 DOI: 10.1007/bf02895832] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
To provide a scientific basis for determining the health surveillance period of dust-exposed workers, data of a retrospective cohort study was re-analyzed with emphasis on natural course of silicosis. 33640 workers exposed to silica dust who were employed for at least 1 year from 1972 to 1974 in twenty Chinese mines or pottery factories were included as subjects, and were followed up till December 31, 1994. The cohort included subjects from 8 tungsten mines, 4 tin mines and 8 pottery factories. Our results showed that the mean latency of silicosis, for all the cases of the cohorts, was 22.9 +/- 9.8 y. 52.2 % of silicosis was diagnosed approximately 9.1 +/- 5.7 y after the dust exposure had ceased. The progression rates of silicosis from stage I to II and from stage II to III were 48.2 % and 18.5 %, and the duration was 4.1 +/- 0.2 and 6.8 +/- 0.2 y, respectively. The survival times of silicosis stage I , II and III, from the year of diagnosis to death, were 21.5, 15.8 and 6.8 years, respectively. There was 25 % of the silicosis patients whose survival time was beyond 33 y. The mean death age of all silicosis cases was 56.0 y. The death age increased to 65.6 y in the middle of 1990s. Among dust-exposed workers, subjects who became suspected case (0+ ) accounted for 15.0 %. 48.7 % of the suspected silicosis cases developed to silicosis, and the average year from the time of being suspected of the disease to the first stage of silicosis was 5.1 y. The natural characteristics, as mentioned above, varied with different mines and factories. We are led to conclude that silicosis is chronic in nature, but progress quickly. As a serious occupational disease it significantly reduces the life span of exposed workers. The study of its natural history is of importance for the development of health surveillance criteria for dust-exposed workers.
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Affiliation(s)
- Haibing Yang
- Department of Occupational Health and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Ferreira AS, Moreira VB, Ricardo HMV, Coutinho R, Gabetto JM, Marchiori E. Fibrose maciça progressiva em trabalhadores expostos à sílica: achados na tomografia computadorizada de alta resolução. J Bras Pneumol 2006; 32:523-8. [PMID: 17435902 DOI: 10.1590/s1806-37132006000600009] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2005] [Accepted: 03/07/2006] [Indexed: 11/22/2022] Open
Abstract
OBJETIVO: Avaliar as características radiológicas das massas conglomeradas pela tomografia computadorizada de alta resolução de tórax. MÉTODOS: Foram selecionados 75 pacientes silicóticos, a maioria jateadores de areia, portadores de fibrose maciça progressiva, atendidos no Hospital Universitário Antônio Pedro entre 1986 e 2004. Os pacientes foram submetidos a avaliação clínica, radiografia simples de tórax e tomografia computadorizada de alta resolução. RESULTADOS: Mais da metade dos pacientes com silicose complicada mostrou na radiografia de tórax grandes opacidades dos tipos B e C, denotando a gravidade da doença nesses pacientes. Dos 75 casos, apenas um apresentou massa unilateral simulando câncer de pulmão. Quarenta e quatro pacientes realizaram tomografia computadorizada de alta resolução do tórax. As massas predominaram nos terços superiores e posteriores (88,6%). Broncograma aéreo e calcificações no interior das massas foram observados em 70,4% e 63,8% dos casos, respectivamente. História de tuberculose foi relatada em 52% dos pacientes estudados. CONCLUSÃO: Na grande maioria dos casos as massas eram bilaterais, predominando nas regiões póstero-superiores dos pulmões, com broncogramas aéreos e calcificações de permeio. Associação com calcificações linfonodais foi um achado freqüente. A exposição a elevadas concentrações de poeira e a tuberculose foram consideradas fatores de risco para o desenvolvimento da fibrose maciça progressiva.
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