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Qi Y, Zhao Y, Xia J, Hu B, Li X, Li Q, Yang Z, Yao W, Hao C. Jun and JunB members of the AP-1 complex are potential therapeutic targets for silicosis. Int J Biol Macromol 2024; 277:134024. [PMID: 39032899 DOI: 10.1016/j.ijbiomac.2024.134024] [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: 05/21/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 07/23/2024]
Abstract
Silicosis is a systemic disease with predominantly diffuse fibrosis of the lungs due to prolonged inhalation of free SiO2 dust during the manufacturing process, for which there is no effective treatment. In this study, we used a combined epigenetic and transcriptomic approach to reveal the chromatin-opening features of silicosis and identify the key transcription factor activator protein 1 (AP-1) that responds to silicosis fibrosis. Therapeutic administration of an AP-1 inhibitor inhibits the PI3K/AKT signaling pathway, reduces fibrosis marker proteins, and significantly ameliorates lung fibrosis in a mouse model of silicosis. In addition, it was observed that the expression of Jun and JunB was significantly up-regulated in a TGF-β1-induced in vitro transdifferentiation model of NIH/3T3 cells, and Co-IP confirmed that a protein complex could be formed between Jun and JunB. Mechanistically, silencing of Jun and JunB expression reversed the activation of the PI3K/AKT signaling pathway and the upregulation of fibrosis marker proteins in NIH/3 T3 cells after TGF-β1 stimulation. Taken together, Jun/JunB is expected to be a potential therapeutic target for silicosis fibrosis.
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Affiliation(s)
- Yuanmeng Qi
- Department of Occupational and Environment Health, College of Public Health, Zhengzhou University, 450001, Henan, China
| | - YouLiang Zhao
- Department of Occupational and Environment Health, College of Public Health, Zhengzhou University, 450001, Henan, China
| | - JiaRui Xia
- Department of Occupational and Environment Health, College of Public Health, Zhengzhou University, 450001, Henan, China
| | - Botao Hu
- Department of Occupational and Environment Health, College of Public Health, Zhengzhou University, 450001, Henan, China
| | - Xiaoying Li
- Department of Occupational and Environment Health, College of Public Health, Zhengzhou University, 450001, Henan, China
| | - Qimeng Li
- Department of Occupational and Environment Health, College of Public Health, Zhengzhou University, 450001, Henan, China
| | - Zhenzhen Yang
- Department of Occupational and Environment Health, College of Public Health, Zhengzhou University, 450001, Henan, China
| | - Wu Yao
- Department of Occupational and Environment Health, College of Public Health, Zhengzhou University, 450001, Henan, China.
| | - Changfu Hao
- Department of Child and Adolescence Health, College of Public Health, Zhengzhou University, 450001, Henan, China.
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Ege D, Lu HH, Boccaccini AR. Bioactive Glass and Silica Particles for Skeletal and Cardiac Muscle Tissue Regeneration. TISSUE ENGINEERING. PART B, REVIEWS 2024; 30:448-461. [PMID: 38126329 DOI: 10.1089/ten.teb.2023.0277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
When skeletal and cardiac tissues are damaged, surgical approaches are not always successful and tissue regeneration approaches are investigated. Reports in the literature indicate that silica nanoparticles and bioactive glasses (BGs), including silicate bioactive glasses (e.g., 45S5 BG), phosphate glass fibers, boron-doped mesoporous BGs, borosilicate glasses, and aluminoborates, are promising for repairing skeletal muscle tissue. Silica nanoparticles and BGs have been combined with polymers to obtain aligned nanofibers and to maintain controlled delivery of nanoparticles for skeletal muscle repair. The literature indicates that cardiac muscle regeneration can be also triggered by the ionic products of BGs. This was observed to be due to the release of vascular endothelial growth factor and other growth factors from cardiomyocytes, which regulate endothelial cells to form capillary structures (angiogenesis). Specific studies, including both in vitro and in vivo approaches, are reviewed in this article. The analysis of the literature indicates that although the research field is still very limited, BGs are showing great promise for muscle tissue engineering and further research in the field should be carried out to expand our basic knowledge on the application of BGs in muscle (skeletal and cardiac) tissue regeneration. Impact statement This review highlights the potential of silica particles and bioactive glasses (BGs) for skeletal and cardiac tissue regeneration. These biomaterials create scaffolds triggering muscle cell differentiation. Ionic products from BGs stimulate growth factors, supporting angiogenesis in cardiac tissue repair. Further research is required to expand our know-how on silica particles and BGs in muscle tissue engineering.
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Affiliation(s)
- Duygu Ege
- Institute of Biomedical Engineering, Bogazici University, Istanbul, Turkey
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Hsuan-Heng Lu
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Aldo R Boccaccini
- Department of Materials Science and Engineering, Institute of Biomaterials, University of Erlangen-Nuremberg, Erlangen, Germany
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da Silva HT, Magalhães TS, Pires SA, Santos APR, Rodrigues JL, Faria MCDS. Artisanal Gem Mining in Brazil: Evaluation of Oxidative Stress and Genotoxicity Biomarkers. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2024; 21:871. [PMID: 39063448 PMCID: PMC11277206 DOI: 10.3390/ijerph21070871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 06/26/2024] [Accepted: 06/28/2024] [Indexed: 07/28/2024]
Abstract
This study was carried out in the district of Taquaral de Minas, in the municipality of Itinga, located in Jequitinhonha Valley, state of Minas Gerais, which is considered one of the largest yolk-producing regions in Brazil. Miners in gem extraction areas are prone to severe oxidative damage due to their increased exposure to toxic metals, as well as chemical, physical, and biological agents, resulting in diseases such as silicosis. Thus, this work aimed to evaluate occupational exposure in prospectors through biomonitoring techniques using a variety of biomarkers for oxidative stress, genotoxicity, and mutagenicity. Twenty-two miners and seventeen workers who were not occupationally exposed were recruited, totaling thirty-nine participants. The study was approved by the Research Ethics Committee of the Federal University of the Jequitinhonha and Mucuri Valleys. In this study, the levels of total peroxides, catalase activity, and microelements in plasma were evaluated. Additionally, environmental analysis was carried out through the Ames and Allium cepa tests. The results of the lipoperoxidation assessment were significant, with increased frequencies in exposed individuals compared to controls (p < 0.05), as determined by the Mann-Whitney test. Micronutrients in the blood showed lower concentrations in the group exposed to Fe and Se than in individuals not exposed to these elements. The results of the Ames test and Allium cepa test were statistically significant compared to the controls (p < 0.05), as determined by the Mann-Whitney test for genotoxicity and cytotoxicity. Thus, the results of the present study indicate possible environmental contamination and a potential risk to the health of miners, which suggests that further studies are important in the region.
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Affiliation(s)
- Heberson Teixeira da Silva
- Instituto de Ciência, Engenharia e Tecnologia (ICET), Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Teófilo Otoni 39803-371, MG, Brazil; (H.T.d.S.); (T.S.M.); (S.A.P.); (A.P.R.S.); (M.C.d.S.F.)
| | - Thainá Sprícido Magalhães
- Instituto de Ciência, Engenharia e Tecnologia (ICET), Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Teófilo Otoni 39803-371, MG, Brazil; (H.T.d.S.); (T.S.M.); (S.A.P.); (A.P.R.S.); (M.C.d.S.F.)
| | - Sumaia Araújo Pires
- Instituto de Ciência, Engenharia e Tecnologia (ICET), Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Teófilo Otoni 39803-371, MG, Brazil; (H.T.d.S.); (T.S.M.); (S.A.P.); (A.P.R.S.); (M.C.d.S.F.)
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, Brazil
| | - Ana Paula Rufino Santos
- Instituto de Ciência, Engenharia e Tecnologia (ICET), Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Teófilo Otoni 39803-371, MG, Brazil; (H.T.d.S.); (T.S.M.); (S.A.P.); (A.P.R.S.); (M.C.d.S.F.)
| | - Jairo Lisboa Rodrigues
- Instituto de Ciência, Engenharia e Tecnologia (ICET), Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Teófilo Otoni 39803-371, MG, Brazil; (H.T.d.S.); (T.S.M.); (S.A.P.); (A.P.R.S.); (M.C.d.S.F.)
| | - Márcia Cristina da Silva Faria
- Instituto de Ciência, Engenharia e Tecnologia (ICET), Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM), Teófilo Otoni 39803-371, MG, Brazil; (H.T.d.S.); (T.S.M.); (S.A.P.); (A.P.R.S.); (M.C.d.S.F.)
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Huang C, Liu X, Wu Q, Cao J, Zhu X, Wang X, Song Y. Cardiovascular toxic effects of nanoparticles and corresponding molecular mechanisms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 356:124360. [PMID: 38871171 DOI: 10.1016/j.envpol.2024.124360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 06/04/2024] [Accepted: 06/09/2024] [Indexed: 06/15/2024]
Abstract
Rapid advancements in nanotechnology have been integrated into various disciplines, leading to an increased prevalence of nanoparticle exposure. The widespread utilization of nanomaterials and heightened levels of particulate pollution have prompted government departments to intensify their focus on assessing the safety of nanoparticles (NPs). The cardiovascular system, crucial for maintaining human health, has emerged as vulnerable to damage from nanoparticle exposure. A mounting body of evidence indicates that interactions can occur when NPs come into contact with components of the cardiovascular system, contributing to adverse cardiovascular disease (CVD). However, the underlying molecular mechanisms driving these events remain elusive. This work provides a comprehensive review of recent advance on nanoparticle-induced adverse cardiovascular events and offers insight into the associated molecular mechanisms. Finally, the influencing factors of NPs-induced cardiovascular toxicity are discussed.
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Affiliation(s)
- Chunfeng Huang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xuting Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Qingchun Wu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jianzhong Cao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiangyu Zhu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xinyu Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yang Song
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
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Abstract
PURPOSE OF REVIEW There has been a rapid increase in silicosis cases, particularly related to artificial stone. The key to management is avoidance of silica exposure. Despite this, many develop progressive disease and there are no routinely recommended treatments. This review provides a summary of the literature pertaining to pharmacological therapies for silicosis and examines the plausibility of success of such treatments given the disease pathogenesis. RECENT FINDINGS In-vitro and in-vivo models demonstrate potential efficacy for drugs, which target inflammasomes, cytokines, effector cells, fibrosis, autophagy, and oxidation. SUMMARY There is some evidence for potential therapeutic targets in silicosis but limited translation into human studies. Treatment of silicosis likely requires a multimodal approach, and there is considerable cross-talk between pathways; agents that modulate both inflammation, fibrosis, autophagy, and ROS production are likely to be most efficacious.
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Affiliation(s)
- Hayley Barnes
- Monash Centre for Occupational and Environmental Health, Monash University
- Department of Respiratory Medicine, Alfred Health
- Central Clinical School, Monash University, Melbourne
| | - Maggie Lam
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton
- Department of Molecular and Translational Sciences, Monash University, Clayton, Victoria, Australia
| | - Michelle D Tate
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Clayton
- Department of Molecular and Translational Sciences, Monash University, Clayton, Victoria, Australia
| | - Ryan Hoy
- Monash Centre for Occupational and Environmental Health, Monash University
- Department of Respiratory Medicine, Alfred Health
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Ao LH, Wei YG, Tian HR, Zhao H, Li J, Ban JQ. Advances in the study of silica nanoparticles in lung diseases. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169352. [PMID: 38110102 DOI: 10.1016/j.scitotenv.2023.169352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 12/01/2023] [Accepted: 12/11/2023] [Indexed: 12/20/2023]
Abstract
Silicon dioxide nanoparticles (SiNPs) are one of the major forms of silicon dioxide and are composed of the most-abundant compounds on earth. Based on their excellent properties, SiNPs are widely used in food production, synthetic processes, medical diagnostics, drug delivery, and other fields. The mass production and wide application of SiNPs increases the risk of human exposure to SiNPs. In the workplace and environment, SiNPs mainly enter the human body through the respiratory tract and reach the lungs; therefore, the lungs are the most important and most toxicologically affected target organ of SiNPs. An increasing number of studies have shown that SiNP exposure can cause severe lung toxicity. However, studies on the toxicity of SiNPs in ex vivo and in vivo settings are still in the exploratory phase. The molecular mechanisms underlying the lung toxicity of SiNPs are varied and not yet fully understood. As a result, this review summarizes the possible mechanisms of SiNP-induced lung toxicity, such as oxidative stress, endoplasmic reticulum stress, mitochondrial damage, and cell death. Moreover, this study provides a summary of the progression of diseases caused by SiNPs, thereby establishing a theoretical basis for future studies on the mechanisms of SiNP-induced lung toxicity.
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Affiliation(s)
- Li-Hong Ao
- School of Public Heath, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou 550025, China
| | - Yun-Geng Wei
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Hong-Ru Tian
- School of Public Heath, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou 550025, China
| | - Hua Zhao
- School of Public Heath, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou 550025, China
| | - Jun Li
- School of Public Heath, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou 550025, China
| | - Jia-Qi Ban
- School of Public Heath, The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, Guizhou 550025, China.
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Li J, Deng B, Zhang J, Zhang X, Cheng L, Li G, Su P, Miao X, Yang W, Xie J, Wang R. The Peptide DH α-(4-pentenyl)-ANPQIR-NH 2 Exhibits Antifibrotic Activity in Multiple Pulmonary Fibrosis Models Induced by Particulate and Soluble Chemical Fibrogenic Agents. J Pharmacol Exp Ther 2024; 388:701-714. [PMID: 38129127 DOI: 10.1124/jpet.123.001849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/26/2023] [Accepted: 11/02/2023] [Indexed: 12/23/2023] Open
Abstract
Interstitial lung diseases (ILDs) are a group of restrictive lung diseases characterized by interstitial inflammation and pulmonary fibrosis. The incidence of ILDs associated with exposure to multiple hazards such as inhaled particles, fibers, and ingested soluble chemicals is increasing yearly, and there are no ideal drugs currently available. Our previous research showed that the novel and low-toxicity peptide DHα-(4-pentenyl)-ANPQIR-NH2 (DR3penA) had a strong antifibrotic effect on a bleomycin-induced murine model. Based on the druggability of DR3penA, we sought to investigate its effects on respirable particulate silicon dioxide (SiO2)- and soluble chemical paraquat (PQ)-induced pulmonary fibrosis in this study by using western blot, quantitative reverse-transcription polymerase chain reaction (RT-qPCR), immunofluorescence, H&E and Masson staining, immunohistochemistry, and serum biochemical assays. The results showed that DR3penA alleviated the extent of fibrosis by inhibiting the expression of fibronectin and collagen I and suppressed oxidative stress and epithelial-mesenchymal transition (EMT) in vitro and in vivo. Further study revealed that DR3penA may mitigate pulmonary fibrosis by negatively regulating the phosphatidylinositol 3-kinase/protein kinase B (PI3K/AKT) pathway and mitogen-activated protein kinase (MAPK) pathway. Unexpectedly, through the conversion of drug bioavailability under different routes of administration, DR3penA exerted antifibrotic effects equivalent to those of the positive control drug pirfenidone (PFD) at lower doses. In summary, DR3penA may be a promising lead compound for various fibrotic ILDs. SIGNIFICANCE STATEMENT: Our study verified that DHα-(4-pentenyl)-ANPQIR-NH2 (DR3penA) exhibited positive antifibrotic activity in pulmonary fibrosis induced by silicon dioxide (SiO2) particles and soluble chemical paraquat (PQ) and demonstrated a low-dose advantage compared to the small-molecule drug pirfenidone (PFD). The peptide DR3penA can be further developed for the treatment of multiple fibrotic lung diseases.
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Affiliation(s)
- Jieru Li
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
| | - Bochuan Deng
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
| | - Jiao Zhang
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
| | - Xiang Zhang
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
| | - Lu Cheng
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
| | - Guofeng Li
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
| | - Ping Su
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
| | - Xiaokang Miao
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
| | - Wenle Yang
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
| | - Junqiu Xie
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
| | - Rui Wang
- Institute of Materia Medica and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China (J.L., R.W.); Department of General Surgery, The Second Hospital and Clinical Medical School (J.L.) and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066 (B.D., J.Z., X.Z., P.S., X.M., W.Y., J.X., R.W.), Lanzhou University, Lanzhou, China; and School of Biomedical Engineering (L.C.) and School of Pharmaceutical Sciences (G.L.), Shenzhen University Health Science Centre, Shenzhen University, Shenzhen, China
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8
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Wu WB, Lee IT, Lin YJ, Wang SY, Hsiao LD, Yang CM. Silica Nanoparticles Shed Light on Intriguing Cellular Pathways in Human Tracheal Smooth Muscle Cells: Revealing COX-2/PGE 2 Production through the EGFR/Pyk2 Signaling Axis. Biomedicines 2024; 12:107. [PMID: 38255212 PMCID: PMC10813532 DOI: 10.3390/biomedicines12010107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/02/2024] [Accepted: 01/03/2024] [Indexed: 01/24/2024] Open
Abstract
The use of manufactured silica nanoparticles (SiNPs) has become widespread in everyday life, household products, and various industrial applications. While the harmful effects of crystalline silica on the lungs, known as silicosis or chronic pulmonary diseases, are well understood, the impact of SiNPs on the airway is not fully explored. This study aimed to investigate the potential effects of SiNPs on human tracheal smooth muscle cells (HTSMCs). Our findings revealed that SiNPs induced the expression of cyclooxygenase-2 (COX-2) mRNA/protein and the production of prostaglandin E2 (PGE2) without causing cytotoxicity. This induction was transcription-dependent, as confirmed by cell viability assays and COX-2 luciferase reporter assays. Further analysis, including Western blot with pharmacological inhibitors and siRNA interference, showed the involvement of receptor tyrosine kinase (RTK) EGF receptor (EGFR), non-RTK Pyk2, protein kinase Cα (PKCα), and p42/p44 MAPK in the induction process. Notably, EGFR activation initiated cellular signaling that led to NF-κB p65 phosphorylation and translocation into the cell nucleus, where it bound and stimulated COX-2 gene transcription. The resulting COX-2 protein triggered PGE2 production and secretion into the extracellular space. Our study demonstrated that SiNPs mediate COX-2 up-regulation and PGE2 secretion in HTSMCs through the sequential activation of the EGFR/Pyk2/PKCα/p42/p44MAPKs-dependent NF-κB signaling pathway. Since PGE2 can have both physiological bronchodilatory and anti-inflammatory effects, as well as pathological pro-inflammatory effects, the increased PGE2 production in the airway might act as a protective compensatory mechanism and/or a contributing factor during airway exposure to SiNPs.
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Affiliation(s)
- Wen-Bin Wu
- School of Medicine, Fu Jen Catholic University, New Taipei City 242062, Taiwan;
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242062, Taiwan; (S.-Y.W.); (L.-D.H.)
| | - I-Ta Lee
- School of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei 110301, Taiwan;
| | - Yan-Jyun Lin
- Institute of Translational Medicine and New Drug Development, College of Medicine, China Medical University, Taichung 406040, Taiwan;
| | - Ssu-Ying Wang
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242062, Taiwan; (S.-Y.W.); (L.-D.H.)
| | - Li-Der Hsiao
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242062, Taiwan; (S.-Y.W.); (L.-D.H.)
| | - Chuen-Mao Yang
- Graduate Institute of Biomedical and Pharmaceutical Science, Fu Jen Catholic University, New Taipei City 242062, Taiwan; (S.-Y.W.); (L.-D.H.)
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9
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Zhao JH, Li S, Du SL, Zhang ZQ. The role of mitochondrial dysfunction in macrophages on SiO 2 -induced pulmonary fibrosis: A review. J Appl Toxicol 2024; 44:86-95. [PMID: 37468209 DOI: 10.1002/jat.4517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 06/13/2023] [Accepted: 06/29/2023] [Indexed: 07/21/2023]
Abstract
Several epidemiologic and toxicological studies have widely regarded that mitochondrial dysfunction is a popular molecular event in the process of silicosis from different perspectives, but the details have not been systematically summarized yet. Thus, it is necessary to investigate how silica dust leads to pulmonary fibrosis by damaging the mitochondria of macrophages. In this review, we first introduce the molecular mechanisms that silica dust induce mitochondrial morphological and functional abnormalities and then introduce the main molecular mechanisms that silica-damaged mitochondria induce pulmonary fibrosis. Finally, we conclude that the mitochondrial abnormalities of alveolar macrophages caused by silica dust are involved deeply in the pathogenesis of silicosis through these two sequential mechanisms. Therefore, reducing the silica-damaged mitochondria will prevent the potential occurrence and fatality of the disease in the future.
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Affiliation(s)
- Jia-Hui Zhao
- Weifang Medical University, Weifang, Shandong, China
- Department of Public Health, Jining Medical University, Jining, Shandong, China
| | - Shuang Li
- Department of Public Health, Jining Medical University, Jining, Shandong, China
- Binzhou Medical University, Yantai, Shandong, China
| | - Shu-Ling Du
- Weifang Medical University, Weifang, Shandong, China
- Department of Public Health, Jining Medical University, Jining, Shandong, China
| | - Zhao-Qiang Zhang
- Department of Public Health, Jining Medical University, Jining, Shandong, China
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10
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Yuan H, You Y, He Y, Wei Y, Zhang Y, Min H, Li C, Chen J. Crystalline Silica-Induced Proinflammatory Interstitial Macrophage Recruitment through Notch3 Signaling Promotes the Pathogenesis of Silicosis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:14502-14514. [PMID: 37721423 DOI: 10.1021/acs.est.3c03980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
Crystalline silica (CS) particles are ubiquitous in the environment, especially in occupational conditions, and exposure to respirable CS causes silicosis. The initial response to CS is mediated by innate immunity, where pulmonary macrophages act as central orchestrators. However, the repercussions of CS on functionally distinct macrophage subsets remain to be inconclusive. Herein, to study the effects of inhaled CS, we divided macrophages into three subsets: circulating monocytes, interstitial macrophages (IMs), and alveolar macrophages (AMs). CS-induced massive IMs increase in the lung, the phenotype and function of which differed from those of tissue-resident AMs and circulating monocytes. The augmented IMs were driven by recruitment of circulating macrophages rather than cell proliferation in situ. Moreover, the IMs predominantly exerted a classic activated (M1) phenotype and expressed proinflammatory cytokines, contributing to CS-induced lung injury. Notably, we demonstrated that IMs augmented Notch3 expression. Mechanistically, using myeloid-specific Notch3-knockout mice, we demonstrated that Notch3 signaling not only promoted IMs recruitment by regulating CCR2 expression but also manipulated the proinflammatory phenotype. Mice with conditional Notch3-knockout exhibited alleviation of CS-induced inflammation and fibrosis in lung. Overall, our study identifies IMs as critical mediators in response to CS and highlights the role of Notch3 in IMs recruitment and activation, providing new insights into CS toxicological effects in the lung.
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Affiliation(s)
- Haoyang Yuan
- Key Laboratory of Environmental Stress and Chronic Disease Control & Prevention, (China Medical University), Ministry of Education, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - Yichuan You
- Key Laboratory of Environmental Stress and Chronic Disease Control & Prevention, (China Medical University), Ministry of Education, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - Yangyang He
- Key Laboratory of Environmental Stress and Chronic Disease Control & Prevention, (China Medical University), Ministry of Education, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - Yungeng Wei
- Key Laboratory of Environmental Stress and Chronic Disease Control & Prevention, (China Medical University), Ministry of Education, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - Yuting Zhang
- Key Laboratory of Environmental Stress and Chronic Disease Control & Prevention, (China Medical University), Ministry of Education, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - Hui Min
- Department of Immunology, College of Basic Medical Sciences, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - Chao Li
- Key Laboratory of Environmental Stress and Chronic Disease Control & Prevention, (China Medical University), Ministry of Education, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
| | - Jie Chen
- Key Laboratory of Environmental Stress and Chronic Disease Control & Prevention, (China Medical University), Ministry of Education, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning 110122, PR China
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11
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Li R, Kang H, Chen S. From Basic Research to Clinical Practice: Considerations for Treatment Drugs for Silicosis. Int J Mol Sci 2023; 24:ijms24098333. [PMID: 37176040 PMCID: PMC10179659 DOI: 10.3390/ijms24098333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 04/28/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
Silicosis, characterized by irreversible pulmonary fibrosis, remains a major global public health problem. Nowadays, cumulative studies are focusing on elucidating the pathogenesis of silicosis in order to identify preventive or therapeutic antifibrotic agents. However, the existing research on the mechanism of silica-dust-induced pulmonary fibrosis is only the tip of the iceberg and lags far behind clinical needs. Idiopathic pulmonary fibrosis (IPF), as a pulmonary fibrosis disease, also has the same problem. In this study, we examined the relationship between silicosis and IPF from the perspective of their pathogenesis and fibrotic characteristics, further discussing current drug research and limitations of clinical application in silicosis. Overall, this review provided novel insights for clinical treatment of silicosis with the hope of bridging the gap between research and practice in silicosis.
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Affiliation(s)
- Rou Li
- Key Laboratory of Molecular Epidemiology of Hunan Province, Hunan Normal University, Changsha 410013, China
| | - Huimin Kang
- Key Laboratory of Molecular Epidemiology of Hunan Province, Hunan Normal University, Changsha 410013, China
| | - Shi Chen
- Key Laboratory of Molecular Epidemiology of Hunan Province, Hunan Normal University, Changsha 410013, China
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12
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Tuncsoy B, Tuncsoy M. Particle Size Effect of Micro and Nano Aluminium Oxides on Antioxidant Defence System of Model Organism Galleria mellonella. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2023; 110:75. [PMID: 37002426 DOI: 10.1007/s00128-023-03715-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 03/20/2023] [Indexed: 06/19/2023]
Abstract
Studies on heavy metal toxicity show that toxicity of nanoparticles compared to micro form have hypothesis regarding nanoparticles are more efficient on the oxidative stress. The aim of the study was to compare the toxic effects of nano and micro particles of Al2O3 and tissue differences on oxidative stress using model organism Galleria mellonella larvae. The study presented that Al2O3 NPs increased the antioxidant enzyme activities in the fat body of larvae, whereas Al2O3 MPs increased the enzyme activities in the midgut of larvae. In conclusion, heavy metal toxicity depends on the particle size, as well as tissue differences.
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Affiliation(s)
- Benay Tuncsoy
- Faculty of Engineering, Department of Bioengineering, Adana Alparslan Turkes Science and Technology University, Adana, Turkey
| | - Mustafa Tuncsoy
- Abdi Sutcu Vocational School of Health Services, Cukurova University, Adana, Turkey.
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13
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Effects of Green Tea Polyphenol Epigallocatechin-3-Gallate on Markers of Inflammation and Fibrosis in a Rat Model of Pulmonary Silicosis. Int J Mol Sci 2023; 24:ijms24031857. [PMID: 36768179 PMCID: PMC9916388 DOI: 10.3390/ijms24031857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/08/2023] [Accepted: 01/14/2023] [Indexed: 01/19/2023] Open
Abstract
Inhalation of silica particles causes inflammatory changes leading to fibrotizing silicosis. Considering a lack of effective therapy, and a growing information on the wide actions of green tea polyphenols, particularly epigallocatechin-3-gallate (EGCG), the aim of this study was to evaluate the early effects of EGCG on markers of inflammation and lung fibrosis in silicotic rats. The silicosis model was induced by a single transoral intratracheal instillation of silica (50 mg/mL/animal), while controls received an equivalent volume of saline. The treatment with intraperitoneal EGCG (20 mg/kg, or saline in controls) was initiated the next day after silica instillation and was given twice a week. Animals were euthanized 14 or 28 days after the treatment onset, and the total and differential counts of leukocytes in the blood and bronchoalveolar lavage fluid (BALF), wet/dry lung weight ratio, and markers of inflammation, oxidative stress, and fibrosis in the lung were determined. The presence of collagen and smooth muscle mass in the walls of bronchioles and lung vessels was investigated immunohistochemically. Early treatment with EGCG showed some potential to alleviate inflammation, and a trend to decrease oxidative stress-induced changes, including apoptosis, and a prevention of fibrotic changes in the bronchioles and pulmonary vessels. However, further investigations should be undertaken to elucidate the effects of EGCG in the lung silicosis model in more detail. In addition, because of insufficient data from EGCG delivery in silicosis, the positive and eventual adverse effects of this herbal compound should be carefully studied before any preventive use or therapy with EGCG may be recommended.
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14
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Bellomo C, Pavan C, Fiore G, Escolano-Casado G, Mino L, Turci F. Top-Down Preparation of Nanoquartz for Toxicological Investigations. Int J Mol Sci 2022; 23:ijms232315425. [PMID: 36499757 PMCID: PMC9738116 DOI: 10.3390/ijms232315425] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/23/2022] [Accepted: 12/02/2022] [Indexed: 12/13/2022] Open
Abstract
Occupational exposure to quartz dust is associated with fatal diseases. Quartz dusts generated by mechanical fracturing are characterized by a broad range of micrometric to nanometric particles. The contribution of this nanometric fraction to the overall toxicity of quartz is still largely unexplored, primarily because of the strong electrostatic adhesion forces that prevent isolation of the nanofraction. Furthermore, fractured silica dust exhibits special surface features, namely nearly free silanols (NFS), which impart a membranolytic activity to quartz. Nanoquartz can be synthetized via bottom-up methods, but the surface chemistry of such crystals strongly differs from that of nanoparticles resulting from fracturing. Here, we report a top-down milling procedure to obtain a nanometric quartz that shares the key surface properties relevant to toxicity with fractured quartz. The ball milling was optimized by coupling the dry and wet milling steps, using water as a dispersing agent, and varying the milling times and rotational speeds. Nanoquartz with a strong tendency to form submicrometric agglomerates was obtained. The deagglomeration with surfactants or simulated body fluids was negligible. Partial lattice amorphization and a bimodal crystallite domain size were observed. A moderate membranolytic activity, which correlated with the number of NFS, signaled coherence with the previous toxicological data. A membranolytic nanoquartz for toxicological investigations was obtained.
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Affiliation(s)
- Chiara Bellomo
- Department of Chemistry, University of Turin, 10125 Turin, Italy
- “G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Turin, 10125 Turin, Italy
| | - Cristina Pavan
- Department of Chemistry, University of Turin, 10125 Turin, Italy
- “G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Turin, 10125 Turin, Italy
- Louvain Centre for Toxicology and Applied Pharmacology, Université catholique de Louvain, 1200 Brussels, Belgium
| | - Gianluca Fiore
- Department of Chemistry, University of Turin, 10125 Turin, Italy
- Nanostructured Interfaces and Surfaces Interdepartmental Centre, University of Turin, 10125 Turin, Italy
| | - Guillermo Escolano-Casado
- Department of Chemistry, University of Turin, 10125 Turin, Italy
- Nanostructured Interfaces and Surfaces Interdepartmental Centre, University of Turin, 10125 Turin, Italy
| | - Lorenzo Mino
- Department of Chemistry, University of Turin, 10125 Turin, Italy
- Nanostructured Interfaces and Surfaces Interdepartmental Centre, University of Turin, 10125 Turin, Italy
| | - Francesco Turci
- Department of Chemistry, University of Turin, 10125 Turin, Italy
- “G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Turin, 10125 Turin, Italy
- Nanostructured Interfaces and Surfaces Interdepartmental Centre, University of Turin, 10125 Turin, Italy
- Correspondence: ; Tel.: +39-011-6707566
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15
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Li Y, Zhu Y, Zhao B, Yao Q, Xu H, Lv S, Wang J, Sun Z, Li Y, Guo C. Amorphous silica nanoparticles caused lung injury through the induction of epithelial apoptosis via ROS/Ca 2+/DRP1-mediated mitochondrial fission signaling. Nanotoxicology 2022; 16:713-732. [PMID: 36441139 DOI: 10.1080/17435390.2022.2144774] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 11/03/2022] [Indexed: 11/30/2022]
Abstract
The adverse effects of amorphous silica nanoparticles (SiNPs) exposure on the respiratory system were increasingly recognized, however, its potential pathogenesis still remains not fully elucidated. So, this study aimed to explore its effects on pulmonary injury, and to investigate related mechanisms. Histological investigations illustrated SiNPs triggered the lung injury, mainly manifested as alveolar structure destruction, collagen deposition, and mitochondrial ultrastructural injury. In particular, SiNPs greatly enhanced pulmonary ROS and TUNEL positive rate in lungs, both of which were positively correlated with lung impairments. Further, the underlying mechanisms were investigated in cultured human bronchial epithelial cells (16HBE). Consistent with the in vivo findings, SiNPs caused the impairments on mitochondrial structure, as well as the activation of ROS generation and oxidative injury. Upon SiNPs stimuli, mitochondrial respiration was greatly inhibited, while Ca2+ overload in cytosol and mitochondria owing to ER calcium release was noticed, resulting in mitochondrial-dependent epithelial apoptosis. More importantly, mitochondrial dynamics was imbalanced toward a fission type, as evidenced by upregulated DRP1 and its phosphorylation at Ser616 (DRP1s616), while downregulated DRP1s637, and also MFN1, MFN2. Mechanistic investigations revealed that the activation of ROS/Ca2+ signaling promoted DRP1-mediated mitochondrial fission by SiNPs, forming a vicious cycle, and ultimately contributing to apoptosis in 16HBE. In summary, our results disclosed SiNPs caused pulmonary injury through the induction of epithelial apoptosis via a ROS/Ca2+/DRP1-mediated mitochondrial fission axis.
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Affiliation(s)
- Yan Li
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
| | - Yawen Zhu
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
| | - Bosen Zhao
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, China
| | - Qing Yao
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, China
| | - Hailin Xu
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, China
| | - Songqing Lv
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, China
| | - Ji Wang
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, China
| | - Zhiwei Sun
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, China
| | - Yanbo Li
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, China
| | - Caixia Guo
- Department of Occupational Health and Environmental Health, School of Public Health, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, China
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