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Marques Da Silva V, Benjdir M, Montagne P, Pairon JC, Lanone S, Andujar P. Pulmonary Toxicity of Silica Linked to Its Micro- or Nanometric Particle Size and Crystal Structure: A Review. Nanomaterials (Basel) 2022; 12. [PMID: 35889616 DOI: 10.3390/nano12142392] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/10/2022] [Accepted: 07/11/2022] [Indexed: 02/06/2023]
Abstract
Silicon dioxide (SiO2) is a mineral compound present in the Earth’s crust in two mineral forms: crystalline and amorphous. Based on epidemiological and/or biological evidence, the pulmonary effects of crystalline silica are considered well understood, with the development of silicosis, emphysema, chronic bronchitis, or chronic obstructive pulmonary disease. The structure and capacity to trigger oxidative stress are recognized as relevant determinants in crystalline silica’s toxicity. In contrast, natural amorphous silica was long considered nontoxic, and was often used as a negative control in experimental studies. However, as manufactured amorphous silica nanoparticles (or nanosilica or SiNP) are becoming widely used in industrial applications, these paradigms must now be reconsidered at the nanoscale (<100 nm). Indeed, recent experimental studies appear to point towards significant toxicity of manufactured amorphous silica nanoparticles similar to that of micrometric crystalline silica. In this article, we present an extensive review of the nontumoral pulmonary effects of silica based on in vitro and in vivo experimental studies. The findings of this review are presented both for micro- and nanoscale particles, but also based on the crystalline structure of the silica particles.
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Tan S, Chen S. The Mechanism and Effect of Autophagy, Apoptosis, and Pyroptosis on the Progression of Silicosis. Int J Mol Sci 2021; 22:8110. [PMID: 34360876 DOI: 10.3390/ijms22158110] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 07/27/2021] [Accepted: 07/27/2021] [Indexed: 12/13/2022] Open
Abstract
Silicosis remains one of the most severe pulmonary fibrotic diseases worldwide, caused by chronic exposure to silica dust. In this review, we have proposed that programmed cell death (PCD), including autophagy, apoptosis, and pyroptosis, is closely associated with silicosis progression. Furthermore, some autophagy, apoptosis, or pyroptosis-related signaling pathways or regulatory proteins have also been summarized to contribute greatly to the formation and development of silicosis. In addition, silicosis pathogenesis depends on the crosstalk among these three ways of PCD to a certain extent. In summary, more profound research on these mechanisms and effects may be expected to become promising targets for intervention or therapeutic methods of silicosis in the future.
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Li N, Shi F, Wang X, Yang P, Sun K, Zhang L, Hao X, Li X, Li J, Jin Y. Silica dust exposure induces pulmonary fibrosis through autophagy signaling. Environ Toxicol 2021; 36:1269-1277. [PMID: 33720480 DOI: 10.1002/tox.23124] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
Silicosis is a well-acknowledged occupational lung disease caused by inhalation of a large amount of free silica dust during the production period and eventually a considerable negative impact on the patients' quality of life. Autophagy exerts a critical influence on immune and inflammatory responses during the pathogenesis of pulmonary fibrosis. In this study, we sought to determine whether autophagy is involved in silicosis's pathogenesis and how it may affect pulmonary cellular physiology. In the animal experiments, we found persistent activation of autophagy in the development of pulmonary fibrosis, which was also accompanied by tumor necrosis factor and transforming growth factor expression increased. Therefore, the autophagy signaling pathway may regulate the inflammatory response and affect the progression of fibrosis. Further, in vitro experiments, we used LY294002, RAPA, and N-acetylcysteine (NAC) intervened autophagy. Our results showed that PI3K/Akt/mTOR signaling pathway is involved in the autophagy changed mediated by SiO2 exposed, and autophagy might play a protective role in the progression of pulmonary fibrosis. Additionally, NAC's effect is not apparent on SiO2 -mediated autophagy through the PI3K/Akt/mTOR signaling pathway, but it can reduce the inflammatory response on NR8383 cells mediated by SiO2-exposed. Nevertheless, it's interesting that NAC can reduce the inflammatory response on NR8383 cells mediated by SiO2 -exposed. Taken together, our data demonstrated that SiO2 -exposed can induce pulmonary fibrosis along with autophagy both in vivo and in vitro, NAC could alleviate the inflammatory response NR8383 cells by SiO2 -exposed through non PI3K/Akt/mTOR signaling pathway, and the specific mechanism of its action needs further studying.
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Affiliation(s)
- Ning Li
- School of Public Health, North China University of Science of Technology, Tangshan, China
| | - Fan Shi
- School of Public Health, North China University of Science of Technology, Tangshan, China
| | - Xiaoyan Wang
- Health and Family Planning Enforcement Bureau, Baotou, China
| | - Pan Yang
- School of Public Health, North China University of Science of Technology, Tangshan, China
| | - Kun Sun
- School of Public Health, North China University of Science of Technology, Tangshan, China
| | - Lin Zhang
- Key Laboratory of Birth Regulation and Control Technology of National Health and Family Planning Commission of China, Maternal and Child Health Care Hospital of Shandong Province, Shandong University, Jinan, China
| | - Xiaohui Hao
- School of Public Health, North China University of Science of Technology, Tangshan, China
| | - Xiaoming Li
- School of Public Health, North China University of Science of Technology, Tangshan, China
| | - Jinlong Li
- School of Public Health, North China University of Science of Technology, Tangshan, China
| | - Yulan Jin
- School of Public Health, North China University of Science of Technology, Tangshan, China
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Li W, Xie L, Ma J, Cheng M, Fan L, Xu Y, Wang B, Chen W. Gas6 or Mer deficiency ameliorates silica-induced autophagosomes accumulation in mice lung. Toxicol Lett 2020; 337:28-37. [PMID: 33232774 DOI: 10.1016/j.toxlet.2020.11.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 11/14/2020] [Accepted: 11/16/2020] [Indexed: 12/14/2022]
Abstract
Published evidences have shown that autophagy plays an important role in silica-induced lung inflammation and collagen deposition. Our previous study found that the level of growth arrest-specific protein 6 (Gas6) in bronchoalveolar lavage fluid was increased after silica exposure. However, it is unclear whether Gas6 is involved in the regulation of silica-induced autophagy dysfunction. In this study, we observed an autophagosomes accumulation in wild-type C57BL/6 (WT) mice lung after silica intratracheal instillation and then investigated whether genetic loss of Gas6 (Gas6-/-) could ameliorate it. Our data showed that Gas6-/- mice exhibited a limited autophagosomes accumulation from days 7-84 after silica exposure, revealed by reduced induction and increased degradation of autophagosomes in mice lung tissue. Interestingly, silica particles could elevate the expression of Mer receptor, which was significantly decreased in Gas6-/- mice (P < 0.05). Furthermore, we found that Mer deficiency (Mer-/-) could also reduce the formation of autophagosomes and restore the function of impaired lysosomes in silica-treated mice. Taken together, our results indicate that genetic loss of Gas6 attenuates silica-induced autophagosomes accumulation partly through down-regulating the expression of Mer receptor. Targeting Gas6/Mer-mediated autophagy pathway may provide a novel insight into the prevention and therapy of silica-induced pulmonary fibrosis.
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Affiliation(s)
- Wei Li
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Li Xie
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Jixuan Ma
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Man Cheng
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Lieyang Fan
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Yiju Xu
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Bin Wang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Weihong Chen
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China; Key Laboratory of Environment and Health, Ministry of Education and Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
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Morita H, Shimizu Y, Nakamura Y, Okutomi H, Watanabe T, Yokoyama T, Soda S, Ikeda N, Shiobara T, Miyoshi M, Chibana K, Takemasa A, Kurasawa K. Auto-antibody evaluation in idiopathic interstitial pneumonia and worse survival of patients with Ro52/TRIM21auto-antibody. J Clin Biochem Nutr 2020; 67:199-205. [PMID: 33041518 PMCID: PMC7533866 DOI: 10.3164/jcbn.20-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Accepted: 02/26/2020] [Indexed: 11/22/2022] Open
Abstract
Some patients with interstitial pneumonia (IP) have auto-antibodies, but do not fit the criteria for specific connective tissue diseases. Examination of auto-antibodies is recommended for diagnosis idiopathic pulmonary fibrosis. A prospective cohort study was performed in 285 patients with IP. Eleven auto-antibodies were assessed and patients were followed for 2 years. All 285 patients underwent the myositis panel test (MPT) for 11 auto-antibodies. Among them, 23.5% (67/285) of the patients had a positive MPT and 14.7% (42/285) had connective tissue diseases. Among the 49 MPT positive patients without connective tissue diseases, 29 patients (59.2%) were positive for Ro52, including 17 patients with Ro52 mono-positivity. Among interstitial pneumonia patients without connective tissue diseases, the Ro52 mono-positive patients showed worse at 2-years survival than those who were Ro52 negative (p = 0.022, HR = 5.88, 95% CI 1.29–26.75). Most of the Ro52 positive patients also showed a low titer of anti-nucleolar antibody. About 20% of IP patients had auto-antibodies detectable by the MPT, and Ro52 positive patients accounted for more than half of the MPT positive patients without connective tissue diseases. Detection of Ro52 auto-antibodies may be useful for assessing the risk of progression in idiopathic interstitial pneumonia patients without connective tissue diseases and a low anti-nucleolar antibody titer.
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Affiliation(s)
- Hiroko Morita
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Yasuo Shimizu
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Yusuke Nakamura
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Hiroaki Okutomi
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Taiji Watanabe
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Tatsuya Yokoyama
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Sayo Soda
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Naoya Ikeda
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Taichi Shiobara
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Masaaki Miyoshi
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Kazuyuki Chibana
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Akihiro Takemasa
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
| | - Kazuhiro Kurasawa
- Department of Rheumatology, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
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Yang P, Song R, Li N, Sun K, Shi F, Liu H, Shen F, Jiang S, Zhang L, Jin Y. Silica dust exposure induces autophagy in alveolar macrophages through switching Beclin1 affinity from Bcl-2 to PIK3C3. Environ Toxicol 2020; 35:758-767. [PMID: 32061152 DOI: 10.1002/tox.22910] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2019] [Revised: 01/31/2020] [Accepted: 02/04/2020] [Indexed: 06/10/2023]
Abstract
Increased deposition of silica dust in pulmonary interstitial tissues leads to silicosis, in which autophagy plays a defensive role in silica dust-associated stress response and cell death. Our previous studies revealed that silica dust exposure contributed to autophagy in pulmonary macrophages in vivo, while the specific regulatory mechanism is still unclear. This study aimed to figure out the regulatory mechanism as well as the role of autophagy in the pathogenesis of experimental silicosis. We used 3-methyladenine (3-MA) and ABT-737 to suppress the expression of phosphatidylinositol 3-kinase catalytic subunit type 3 (PIK3C3) and B cell leukemia/lymphoma 2 (Bcl-2), two critical initiators of autophagy, and detected and evaluated the autophagy in NR8383 cells with or without silica dust exposure. We found that exposure of silica dust increased autophagy in NR8383 cells and elevated the expression of Beclin1 and PIK3C3, but it reduced the expression of Bcl-2. The relationship among Beclin1, PIK3C3, and Bcl-2 were then investigated using immunoprecipitation analysis, and we found that suppression of PIK3C3 and/or Bcl-2 using 3-MA and/or ABT-737 could alter the autophagy induced by silica dust in NR8383 cells, and the complexes of Beclin1/PIK3C3 and Beclin1/Bcl-2 were both downregulated, which may be that inhibition of PIK3C3 and Bcl-2 altered the affinity of Beclin1 with PIK3C3 and Bcl-2 and lead to the silence of PIK3C3 signaling. These findings indicate that silica dust exposure induces autophagy via changing the connectivity of Beclin1 from Bcl-2 to PIK3C3.
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Affiliation(s)
- Pan Yang
- School of Public Health, North China University of Science and Technology, Hebei, China
| | - Ruirui Song
- Health Education Department, Center for Disease Control and Prevention, Tianjin, China
| | - Ning Li
- School of Public Health, North China University of Science and Technology, Hebei, China
| | - Kun Sun
- School of Public Health, North China University of Science and Technology, Hebei, China
| | - Fan Shi
- School of Public Health, North China University of Science and Technology, Hebei, China
| | - Heliang Liu
- School of Public Health, North China University of Science and Technology, Hebei, China
| | - Fuhai Shen
- School of Public Health, North China University of Science and Technology, Hebei, China
| | - Shoufang Jiang
- School of Public Health, North China University of Science and Technology, Hebei, China
| | - Lin Zhang
- Key Laboratory of Birth Regulation and Control Technology of National Health Commission of China, Shandong Provincial Maternal and Child Health Care Hospital Affiliated to Shandong University, Jinan, China
| | - Yulan Jin
- School of Public Health, North China University of Science and Technology, Hebei, China
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Chu H, Wang W, Luo W, Zhang W, Cheng Y, Huang J, Wang J, Dai X, Fang S, Chao J. CircHECTD1 mediates pulmonary fibroblast activation via HECTD1. Ther Adv Chronic Dis 2019; 10:2040622319891558. [PMID: 31832126 PMCID: PMC6887829 DOI: 10.1177/2040622319891558] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Accepted: 11/04/2019] [Indexed: 11/16/2022] Open
Abstract
Background: Circular RNA (circRNA), a new class of noncoding RNA, has been shown to be important in silicosis due to its unique role as a transcription regulator or as a sponge of small RNA regulators. Here, the mechanisms underlying circHECTD1/HECTD1 in fibroblast activation and subsequent fibrosis induced by SiO2 were investigated. Methods: Primary human pulmonary fibroblasts (HPF-a) were utilized, combined with quantitative real-time PCR (qRT-PCR) and fluorescence in situ hybridization (FISH) assays. LC3B-LV-RFP lentivirus was used to evaluate the role of autophagy. The CRISPR/Cas9 system was applied to specifically knock down HECTD1, combined with MTT, BrdU, and migration assays, to explore the functional changes induced by SiO2. Results: After exposure to SiO2, the circHECTD1 level was decreased, which was associated with an increase in HECTD1 in HPF-a cells. SiO2-induced autophagy was reversed by either circHECTD1 overexpression or HECTD1 knockdown in HPF-a cells, with restored SiO2-induced fibroblast activation, proliferation, and migration via downstream autophagy. The lungs of mice exposed to SiO2 confirmed the upregulation of HECTD1 in pulmonary fibroblasts. Conclusions: Our data suggested a link between circHECTD1/HECTD1 and fibroblast activation with subsequent fibrosis induced by SiO2, providing novel insight into the potential of circHECTD1/HECTD1 to be a therapeutic target for silicosis.
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Affiliation(s)
- Han Chu
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, China
| | - Wei Wang
- Department of Respiratory Medicine, Nanjing Chest Hospital, Nanjing, Jiangsu, China
| | - Wei Luo
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, China
| | - Wei Zhang
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, China
| | - Yusi Cheng
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, China
| | - Jie Huang
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, China
| | - Jing Wang
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, China
| | - Xiaoniu Dai
- Department of Physiology, School of Medicine, Southeast University, Nanjing, Jiangsu, China
| | - Shencun Fang
- Department of Respiratory Medicine, Nanjing Chest Hospital, Nanjing, Jiangsu, China
| | - Jie Chao
- Department of Physiology, School of Medicine, Southeast University, 87 Dingjiaqiao Road, Nanjing, Jiangsu, 210009, China
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Gualtieri AF, Andreozzi GB, Tomatis M, Turci F. Iron from a geochemical viewpoint. Understanding toxicity/pathogenicity mechanisms in iron-bearing minerals with a special attention to mineral fibers. Free Radic Biol Med 2019; 133:21-37. [PMID: 30071299 DOI: 10.1016/j.freeradbiomed.2018.07.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/17/2018] [Accepted: 07/29/2018] [Indexed: 01/08/2023]
Abstract
Iron and its role as soul of life on Earth is addressed in this review as iron is one of the most abundant elements of our universe, forms the core of our planet and that of telluric (i.e., Earth-like) planets, is a major element of the Earth's crust and is hosted in an endless number of mineral phases, both crystalline and amorphous. To study iron at an atomic level inside the bulk of mineral phases or at its surface, where it is more reactive, both spectroscopy and diffraction experimental methods can be used, taking advantage of nearly the whole spectrum of electromagnetic waves. These methods can be successfully combined to microscopy to simultaneously provide chemical (e.g. iron mapping) and morphological information on mineral particles, and shed light on the interaction of mineral surfaces with organic matter. This review describes the crystal chemistry of iron-bearing minerals of importance for the environment and human health, with special attention to iron in toxic minerals, and the experimental methods used for their study. Special attention is devoted to the Fenton-like chain reaction involving Fe2+ in the formation of highly reactive hydroxyl radicals. The final part of this review deals with release and adsorption of iron in biological fluids, coordinative and oxidative state of iron and in vitro reactivity. To disclose the very mechanisms of carcinogenesis induced by iron-bearing toxic mineral particles, crystal chemistry and surface chemistry are fundamental for a multidisciplinary approach which should involve geo-bio-scientists, toxicologists and medical doctors.
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Affiliation(s)
- Alessandro F Gualtieri
- Department of Chemical and Geological Sciences, The University of Modena and Reggio Emilia, Via Campi 103, I-41125 Modena, Italy.
| | - Giovanni B Andreozzi
- Department of Earth Sciences, Sapienza University of Rome, Piazzale Aldo Moro 5, I-00185 Roma, Italy; CNR-IGAG, U.O. Roma, at Department of Earth Sciences, Sapienza University of Rome, Piazzale A. Moro 5, I-00185 Roma, Italy
| | - Maura Tomatis
- Department of Chemistry, University of Torino, via Pietro Giuria 7, I-10125 Torino, Italy; "G. Sca nsetti" Interdepartmen tal Centre for Studies on Asbestos and Other Toxic Particulates, University of Torino, via Pietro Giuria 9, I-10125 Torino, Italy
| | - Francesco Turci
- Department of Chemistry, University of Torino, via Pietro Giuria 7, I-10125 Torino, Italy; "G. Sca nsetti" Interdepartmen tal Centre for Studies on Asbestos and Other Toxic Particulates, University of Torino, via Pietro Giuria 9, I-10125 Torino, Italy
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Mandrioli D, Schlünssen V, Ádám B, Cohen RA, Colosio C, Chen W, Fischer A, Godderis L, Göen T, Ivanov ID, Leppink N, Mandic-Rajcevic S, Masci F, Nemery B, Pega F, Prüss-Üstün A, Sgargi D, Ujita Y, van der Mierden S, Zungu M, Scheepers PTJ. WHO/ILO work-related burden of disease and injury: Protocol for systematic reviews of occupational exposure to dusts and/or fibres and of the effect of occupational exposure to dusts and/or fibres on pneumoconiosis. Environ Int 2018; 119:174-185. [PMID: 29958118 DOI: 10.1016/j.envint.2018.06.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 05/20/2018] [Accepted: 06/06/2018] [Indexed: 05/18/2023]
Abstract
BACKGROUND The World Health Organization (WHO) and the International Labour Organization (ILO) are developing a joint methodology for estimating the national and global work-related burden of disease and injury (WHO/ILO joint methodology), with contributions from a large network of experts. In this paper, we present the protocol for two systematic reviews of parameters for estimating the number of deaths and disability-adjusted life years attributable to pneumoconiosis from occupational exposure to dusts and/or fibres, to inform the development of the WHO/ILO joint methodology. OBJECTIVES We aim to systematically review studies on occupational exposure to dusts and/or fibres (Systematic Review 1) and systematically review and meta-analyse estimates of the effect of occupational exposure to dusts and/or fibres on pneumoconiosis (Systematic Review 2), applying the Navigation Guide systematic review methodology as an organizing framework. DATA SOURCES Separately for Systematic Reviews 1 and 2, we will search electronic academic databases for potentially relevant records from published and unpublished studies, including Medline, EMBASE, Web of Science and CISDOC. We will also search electronic grey literature databases, Internet search engines and organizational websites; hand-search reference list of previous systematic reviews and included study records; and consult additional experts. STUDY ELIGIBILITY AND CRITERIA We will include working-age (≥15 years) study participants in the formal and informal economy in any WHO and/or ILO Member State but exclude children (<15 years) and unpaid domestic workers. Eligible risk factors will be dusts and/or fibres from: (i) asbestos; (ii) silica; and/or (iii) coal (defined as pure coal dust and/or dust from coal mining). Included outcomes will be (i) asbestosis; (ii) silicosis; (iii) coal worker pneumoconiosis; and (iv) unspecified pneumoconiosis. For Systematic Review 1, we will include quantitative prevalence studies of occupational exposure to dusts and/or fibres (i.e. no versus any exposure) stratified by country, sex, age and industrial sector or occupation. For Systematic Review 2, we will include randomized controlled trials, cohort studies, case-control studies and other non-randomized intervention studies with an estimate of any occupational exposure to dusts and/or fibres on the prevalence of, incidence of or mortality due to pneumoconiosis, compared with the theoretical minimum risk exposure level of no exposure. STUDY APPRAISAL AND SYNTHESIS METHODS At least two review authors will independently screen titles and abstracts against the eligibility criteria at a first stage and full texts of potentially eligible records at a second stage, followed by extraction of data from qualifying studies. At least two review authors will assess risk of bias and the quality of evidence, using the most suited tools currently available. For Systematic Review 2, if feasible, we will combine relative risks using meta-analysis. We will report results using the guidelines for accurate and transparent health estimates reporting (GATHER) for Systematic Review 1 and the preferred reporting items for systematic reviews and meta-analyses guidelines (PRISMA) for Systematic Review 2. PROSPERO REGISTRATION NUMBER CRD42018084131.
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Affiliation(s)
- Daniele Mandrioli
- Cesare Maltoni Cancer Research Center, Ramazzini Institute, Bologna, Italy.
| | - Vivi Schlünssen
- Aarhus University, Aarhus, Denmark; National Research Center for the Working Environment, Copenhagen, Denmark.
| | | | - Robert A Cohen
- Feinberg School of Medicine, Northwestern University, Chicago, IL, United States.
| | - Claudio Colosio
- Department of Health Sciences, University of Milano, Milano, Italy; International Centre for Rural Health, San Paolo Hospital, Milano, Italy.
| | - Weihong Chen
- Department of Occupational & Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | | | | | - Thomas Göen
- University of Erlangen-Nuremberg, Erlangen, Germany.
| | - Ivan D Ivanov
- Department of Public Health, Environmental and Social Determinants of Health, World Health Organization, Geneva, Switzerland.
| | - Nancy Leppink
- Labour Administration, Labour Inspection and Occupational Safety and Health Branch, International Labour Organization, Geneva, Switzerland.
| | | | - Federica Masci
- Department of Health Sciences, University of Milano, Milano, Italy.
| | | | - Frank Pega
- Department of Public Health, Environmental and Social Determinants of Health, World Health Organization, Geneva, Switzerland.
| | - Annette Prüss-Üstün
- Department of Public Health, Environmental and Social Determinants of Health, World Health Organization, Geneva, Switzerland.
| | | | - Yuka Ujita
- Labour Administration, Labour Inspection and Occupational Safety and Health Branch, International Labour Organization, Geneva, Switzerland.
| | | | - Muzimkhulu Zungu
- National Institute for Occupational Health, South Africa, Johannesburg, Gauteng Province, South Africa.
| | - Paul T J Scheepers
- Radboud Institute for Health Sciences, Radboudumc, Nijmegen, the Netherlands.
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11
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Liu H, Cheng Y, Yang J, Wang W, Fang S, Zhang W, Han B, Zhou Z, Yao H, Chao J, Liao H. BBC3 in macrophages promoted pulmonary fibrosis development through inducing autophagy during silicosis. Cell Death Dis 2017; 8:e2657. [PMID: 28277537 PMCID: PMC5386570 DOI: 10.1038/cddis.2017.78] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 02/01/2017] [Accepted: 02/07/2017] [Indexed: 12/15/2022]
Abstract
Following inhalation into the lungs, silica particles are engulfed by alveolar macrophages, which triggers endogenous or exogenous apoptosis signaling pathways. As an inducer of apoptosis, the role of BBC3/PUMA (BCL2-binding component 3) in macrophages during silicosis remains unknown. Here, we exposed U937 cell-derived macrophages (UDMs) to SiO2in vitro to explore the function of BBC3 in SiO2-induced disease. We found that SiO2 induced increased BBC3 expression, as well as macrophage activation and apoptosis. Knockdown of Bbc3 with specific siRNA significantly mitigated the SiO2-induced effects. In addition, our results clearly showed increased levels of autophagy in macrophages exposed to SiO2. However, inhibition of BBC3 decreased the occurrence of autophagy. Furthermore, we observed that the blockade of autophagy with 3-MA, an autophagy inhibitor, inhibited SiO2-induced macrophage activation and apoptosis. In contrast, rapamycin, an autophagy inducer, further enhanced the effects induced by SiO2. The conditioned medium from macrophages exposed to SiO2 promoted the proliferation and migration of fibroblasts, and the inhibition of BBC3/autophagy reduced the effects of the conditioned medium on fibroblasts. In the mouse model of silicosis, Bbc3 knockout mice clearly exhibited decreased levels of autophagy and fibrosis progression. These results suggest that downregulation of BBC3 expression may become a novel therapeutic strategy for the treatment of silicosis.
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Affiliation(s)
- Haijun Liu
- Neurobiology Laboratory, New Drug Screening Centre, China Pharmaceutical University, Nanjing, China.,Department of Physiology, School of Medicine, Southeast University, Nanjing, China
| | - Yusi Cheng
- Department of Physiology, School of Medicine, Southeast University, Nanjing, China
| | - Jian Yang
- Department of Physiology, School of Medicine, Southeast University, Nanjing, China
| | - Wei Wang
- Nine Department of Respiratory Medicine, Nanjing Chest Hospital, Nanjing, China
| | - Shencun Fang
- Nine Department of Respiratory Medicine, Nanjing Chest Hospital, Nanjing, China
| | - Wei Zhang
- Department of Physiology, School of Medicine, Southeast University, Nanjing, China
| | - Bing Han
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, China
| | - Zewei Zhou
- Department of Physiology, School of Medicine, Southeast University, Nanjing, China.,Department of Pharmacology, School of Medicine, Southeast University, Nanjing, China
| | - Honghong Yao
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, China.,Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, China
| | - Jie Chao
- Department of Physiology, School of Medicine, Southeast University, Nanjing, China.,Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, China.,Department of Respiration, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Hong Liao
- Neurobiology Laboratory, New Drug Screening Centre, China Pharmaceutical University, Nanjing, China
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12
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Liu H, Fang S, Wang W, Cheng Y, Zhang Y, Liao H, Yao H, Chao J. Macrophage-derived MCPIP1 mediates silica-induced pulmonary fibrosis via autophagy. Part Fibre Toxicol 2016; 13:55. [PMID: 27782836 PMCID: PMC5078901 DOI: 10.1186/s12989-016-0167-z] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 10/13/2016] [Indexed: 12/13/2022] Open
Abstract
Background Silicosis is characterized by accumulation of fibroblasts and excessive deposition of extracellular matrix. Monocyte chemotactic protein-1-induced protein 1 (MCPIP1) plays a critical role in fibrosis induced by SiO2. However, the details of the downstream events of MCPIP1 activity in pulmonary fibrosis remain unclear. To elucidate the role of MCPIP1-induced autophagy in SiO2-induced fibrosis, both the upstream molecular mechanisms and the functional effects of SiO2 on cell apoptosis, proliferation and migration were investigated. Results Experiments using primary cultures of alveolar macrophages from healthy donors and silicosis patients as well as differentiated U937 macrophages demonstrated the following results: 1) SiO2 induced macrophage autophagy in association with enhanced expression of MCPIP1; 2) autophagy promoted apoptosis and activation of macrophages exposed to SiO2, and these events induced the development of silicosis; 3) MCPIP1 facilitated macrophage apoptosis and activation via p53 signaling-mediated autophagy; and 4) SiO2-activated macrophages promoted the proliferation and migration of fibroblasts via the MCPIP1/p53-mediated autophagy pathway. Conclusions Our results elucidated a link between SiO2-induced fibrosis and MCPIP1/p53 signaling-mediated autophagy. These findings provide novel insight into the potential targeting of MCPIP1 or autophagy in the development of potential therapeutic strategies for silicosis. Electronic supplementary material The online version of this article (doi:10.1186/s12989-016-0167-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Haijun Liu
- Department of Physiology, School of Medicine, Southeast University, 87 Dingjiaqiao Rd, Nanjing, Jiangsu, 210009, China.,Neurobiology Laboratory, New Drug Screening Centre, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China
| | - Shencun Fang
- Nine Department of Respiratory Medicine, Nanjing Chest Hospital, Nanjing, Jiangsu, 210029, China
| | - Wei Wang
- Nine Department of Respiratory Medicine, Nanjing Chest Hospital, Nanjing, Jiangsu, 210029, China
| | - Yusi Cheng
- Department of Physiology, School of Medicine, Southeast University, 87 Dingjiaqiao Rd, Nanjing, Jiangsu, 210009, China
| | - Yingming Zhang
- Nine Department of Respiratory Medicine, Nanjing Chest Hospital, Nanjing, Jiangsu, 210029, China
| | - Hong Liao
- Neurobiology Laboratory, New Drug Screening Centre, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China
| | - Honghong Yao
- Department of Pharmacology, School of Medicine, Southeast University, 87 Dingjiaqiao Rd, Nanjing, Jiangsu, 210009, China. .,Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210096, China.
| | - Jie Chao
- Department of Physiology, School of Medicine, Southeast University, 87 Dingjiaqiao Rd, Nanjing, Jiangsu, 210009, China. .,Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210096, China. .,Department of Respiration, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China.
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13
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Jessop F, Hamilton RF, Rhoderick JF, Shaw PK, Holian A. Autophagy deficiency in macrophages enhances NLRP3 inflammasome activity and chronic lung disease following silica exposure. Toxicol Appl Pharmacol 2016; 309:101-10. [PMID: 27594529 DOI: 10.1016/j.taap.2016.08.029] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 08/20/2016] [Accepted: 08/30/2016] [Indexed: 01/12/2023]
Abstract
Autophagy is an important metabolic mechanism that can promote cellular survival following injury. The specific contribution of autophagy to silica-induced inflammation and disease is not known. The objective of these studies was to determine the effects of silica exposure on the autophagic pathway in macrophages, as well as the general contribution of autophagy in macrophages to inflammation and disease. Silica exposure enhanced autophagic activity in vitro in Bone Marrow derived Macrophages and in vivo in Alveolar Macrophages isolated from silica-exposed mice. Impairment of autophagy in myeloid cells in vivo using Atg5(fl/fl)LysM-Cre(+) mice resulted in enhanced cytotoxicity and inflammation after silica exposure compared to littermate controls, including elevated IL-18 and the alarmin HMGB1 in the whole lavage fluid. Autophagy deficiency caused some spontaneous inflammation and disease. Greater silica-induced acute inflammation in Atg5(fl/fl)LysM-Cre(+) mice correlated with increased fibrosis and chronic lung disease. These studies demonstrate a critical role for autophagy in suppressing silica-induced cytotoxicity and inflammation in disease development. Furthermore, this data highlights the importance of basal autophagy in macrophages and other myeloid cells in maintaining lung homeostasis.
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Affiliation(s)
- Forrest Jessop
- Center for Environmental Health Sciences, University of Montana, Missoula, Montana, United States
| | - Raymond F Hamilton
- Center for Environmental Health Sciences, University of Montana, Missoula, Montana, United States
| | - Joseph F Rhoderick
- Center for Environmental Health Sciences, University of Montana, Missoula, Montana, United States
| | - Pamela K Shaw
- Center for Environmental Health Sciences, University of Montana, Missoula, Montana, United States
| | - Andrij Holian
- Center for Environmental Health Sciences, University of Montana, Missoula, Montana, United States.
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