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Huang S, Li Q, Song Y. Codonopsis pilosula polysaccharide suppresses the progression of non-small cell lung cancer by triggering NLRP3/GSDMD-dependent pyroptosis. Discov Oncol 2024; 15:510. [PMID: 39348037 PMCID: PMC11442958 DOI: 10.1007/s12672-024-01361-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2024] [Accepted: 09/17/2024] [Indexed: 10/01/2024] Open
Abstract
BACKGROUND Non-small cell lung cancer (NSCLC) represents a prevalent and challenging malignancy, often posing difficulties in treatment due to late-stage diagnosis and limited therapeutic options. OBJECTIVE This study aims to elucidate the impact of Codonopsis pilosula polysaccharide (CPP) on NSCLC, exploring its potential anticancer molecular mechanisms. MATERIALS AND METHODS Purchase A549 cells and treat them with varying concentrations of CPP, dividing them into groups. Use CCK-8 assays for cell proliferation and TUNEL assays for apoptosis detection. Perform Western blot (WB) to detect NF-κB p65, pNF-κB p65, and pyroptosis-related proteins. Measure ROS, inflammatory factors, and LDH levels using kits. Observe pyroptosis morphology under a microscope. Inoculate A549 cells subcutaneously into nude mice to create a xenograft model and treat them with daily CPP injections. Collect tumor tissues, measure tumor volume and mass. Perform TUNEL immunohistochemistry for apoptosis and H&E staining for tumor histology. Detect pyroptosis-related proteins with Western blot and immunohistochemistry, and assess inflammatory factors using ELISA and immunohistochemistry. RESULTS The research reveals a concentration-dependent inhibitory effect of CPP on A549 cell viability, with optimal efficacy observed at 40 μmol/L CPP. CPP demonstrates the capacity to induce apoptosis, mediate NF-κB activation, and accumulate reactive oxygen species (ROS). Notably, CPP promotes pyroptosis in A549 cells and in vivo, upregulating pyroptosis-related proteins. In vivo administration of CPP significantly inhibits tumor growth, accompanied by notable morphological and histological alterations. Additionally, both in vitro and in vivo studies confirm elevated levels of IL-1β and IL-18 in tumor tissues following CPP treatment. DISCUSSION AND CONCLUSION In conclusion, CPP, as a multifaceted agent, suppresses the progression of NSCLC by inducing NLRP3/GSDMD-dependent pyroptosis. This research provides valuable insights into the therapeutic potential of CPP and stimulates further exploration for its integration into future NSCLC treatments.
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Affiliation(s)
- Shaoyan Huang
- Department of Medical Oncology, Yantaishan Hospital Affiliated to Binzhou Medical University, 10087, Science and Technology Avenue, Laishan District, Yantai, 264003, Shandong, China
| | - Quanxing Li
- Department of Cardiothoracic Surgery, Dongying People's Hospital, Dongying, 257000, Shandong, China
| | - Yaobo Song
- Department of Medical Oncology, Yantaishan Hospital Affiliated to Binzhou Medical University, 10087, Science and Technology Avenue, Laishan District, Yantai, 264003, Shandong, China.
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2
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Song D, Tang X, Du J, Tao K, Li Y. Diazepam inhibits LPS-induced pyroptosis and inflammation and alleviates pulmonary fibrosis in mice by regulating the let-7a-5p/MYD88 axis. PLoS One 2024; 19:e0305409. [PMID: 38875245 PMCID: PMC11178199 DOI: 10.1371/journal.pone.0305409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 05/29/2024] [Indexed: 06/16/2024] Open
Abstract
BACKGROUND AND OBJECTIVE Pulmonary fibrosis caused by lung injury is accompanied by varying degrees of inflammation, and diazepam can reduce the levels of inflammatory factors. Therefore, the purpose of this study was to determine whether diazepam can inhibit inflammation and ameliorate pulmonary fibrosis by regulating the let-7a-5p/myeloid differentiation factor 88 (MYD88) axis. METHODS Lipopolysaccharide (LPS) was used to induce cell pyroptosis in an animal model of pulmonary fibrosis. After treatment with diazepam, changes in cell proliferation and apoptosis were observed, and the occurrence of inflammation and pulmonary fibrosis in the mice was detected. RESULTS The results showed that LPS can successfully induce cell pyroptosis and inflammatory responses and cause lung fibrosis in mice. Diazepam inhibits the expression of pyroptosis-related factors and inflammatory factors; moreover, it attenuates the occurrence of pulmonary fibrosis in mice. Mechanistically, diazepam can upregulate the expression of let-7a-5p, inhibit the expression of MYD88, and reduce inflammation and inhibit pulmonary fibrosis by regulating the let-7a-5p/MYD88 axis. CONCLUSION Our findings indicated that diazepam can inhibit LPS-induced pyroptosis and inflammatory responses and alleviate pulmonary fibrosis in mice by regulating the let-7a-5p/MYD88 axis.
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Affiliation(s)
- Duanyi Song
- Department of Anesthesiology, The Second People’s Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Xuefang Tang
- Department of Anesthesiology, The Second People’s Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Juan Du
- Department of Anesthesiology, The Second People’s Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Kang Tao
- Department of Anesthesiology, The Second People’s Hospital of Yunnan Province, Kunming, Yunnan, China
| | - Yun Li
- Department of Anesthesiology, The Second People’s Hospital of Yunnan Province, Kunming, Yunnan, China
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3
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Yang B, Lin Y, Huang Y, Shen YQ, Chen Q. Thioredoxin (Trx): A redox target and modulator of cellular senescence and aging-related diseases. Redox Biol 2024; 70:103032. [PMID: 38232457 PMCID: PMC10827563 DOI: 10.1016/j.redox.2024.103032] [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: 10/14/2023] [Revised: 12/03/2023] [Accepted: 01/04/2024] [Indexed: 01/19/2024] Open
Abstract
Thioredoxin (Trx) is a compact redox-regulatory protein that modulates cellular redox state by reducing oxidized proteins. Trx exhibits dual functionality as an antioxidant and a cofactor for diverse enzymes and transcription factors, thereby exerting influence over their activity and function. Trx has emerged as a pivotal biomarker for various diseases, particularly those associated with oxidative stress, inflammation, and aging. Recent clinical investigations have underscored the significance of Trx in disease diagnosis, treatment, and mechanistic elucidation. Despite its paramount importance, the intricate interplay between Trx and cellular senescence-a condition characterized by irreversible growth arrest induced by multiple aging stimuli-remains inadequately understood. In this review, our objective is to present a comprehensive and up-to-date overview of the structure and function of Trx, its involvement in redox signaling pathways and cellular senescence, its association with aging and age-related diseases, as well as its potential as a therapeutic target. Our review aims to elucidate the novel and extensive role of Trx in senescence while highlighting its implications for aging and age-related diseases.
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Affiliation(s)
- Bowen Yang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
| | - Yumeng Lin
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
| | - Yibo Huang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
| | - Ying-Qiang Shen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
| | - Qianming Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
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Liu TT, Sun HF, Han YX, Zhan Y, Jiang JD. The role of inflammation in silicosis. Front Pharmacol 2024; 15:1362509. [PMID: 38515835 PMCID: PMC10955140 DOI: 10.3389/fphar.2024.1362509] [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: 12/28/2023] [Accepted: 02/21/2024] [Indexed: 03/23/2024] Open
Abstract
Silicosis is a chronic illness marked by diffuse fibrosis in lung tissue resulting from continuous exposure to SiO2-rich dust in the workplace. The onset and progression of silicosis is a complicated and poorly understood pathological process involving numerous cells and molecules. However, silicosis poses a severe threat to public health in developing countries, where it is the most prevalent occupational disease. There is convincing evidence supporting that innate and adaptive immune cells, as well as their cytokines, play a significant role in the development of silicosis. In this review, we describe the roles of immune cells and cytokines in silicosis, and summarize current knowledge on several important inflammatory signaling pathways associated with the disease, aiming to provide novel targets and strategies for the treatment of silicosis-related inflammation.
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Affiliation(s)
| | | | | | - Yun Zhan
- Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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5
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Lamas B, Martins Breyner N, Malaisé Y, Wulczynski M, Galipeau HJ, Gaultier E, Cartier C, Verdu EF, Houdeau E. Evaluating the Effects of Chronic Oral Exposure to the Food Additive Silicon Dioxide on Oral Tolerance Induction and Food Sensitivities in Mice. ENVIRONMENTAL HEALTH PERSPECTIVES 2024; 132:27007. [PMID: 38380914 PMCID: PMC10880545 DOI: 10.1289/ehp12758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 01/08/2024] [Accepted: 01/17/2024] [Indexed: 02/22/2024]
Abstract
BACKGROUND The increasing prevalence of food sensitivities has been attributed to changes in gut microenvironment; however, ubiquitous environmental triggers such as inorganic nanoparticles (NPs) used as food additives have not been thoroughly investigated. OBJECTIVES We explored the impact of the NP-structured food-grade silicon dioxide (f g - SiO 2 ) on intestinal immune response involved in oral tolerance (OT) induction and evaluated the consequences of oral chronic exposure to this food-additive using a mouse model of OT to ovalbumin (OVA) and on gluten immunopathology in mice expressing the celiac disease risk gene, HLA-DQ8. METHODS Viability, proliferation, and cytokine production of mesenteric lymph node (MLN) cells were evaluated after exposure to f g - SiO 2 . C57BL/6J mice and a mouse model of OT to OVA were orally exposed to f g - SiO 2 or vehicle for 60 d. Fecal lipocalin-2 (Lcn-2), anti-OVA IgG, cytokine production, and immune cell populations were analyzed. Nonobese diabetic (NOD) mice expressing HLA-DQ8 (NOD/DQ8), exposed to f g - SiO 2 or vehicle, were immunized with gluten and immunopathology was investigated. RESULTS MLN cells exposed to f g - SiO 2 presented less proliferative T cells and lower secretion of interleukin 10 (IL-10) and transforming growth factor beta (TGF- β ) by T regulatory and CD 45 + CD 11 b + CD 103 + cells compared to control, two factors mediating OT. Mice given f g - SiO 2 exhibited intestinal Lcn-2 level and interferon gamma (IFN- γ ) secretion, showing inflammation and less production of IL-10 and TGF- β . These effects were also observed in OVA-tolerized mice exposed to f g - SiO 2 , in addition to a breakdown of OT and a lower intestinal frequency of T cells. In NOD/DQ8 mice immunized with gluten, the villus-to-crypt ratio was decreased while the CD 3 + intraepithelial lymphocyte counts and the Th1 inflammatory response were aggravated after f g - SiO 2 treatment. DISCUSSION Our results suggest that chronic oral exposure to f g - SiO 2 blocked oral tolerance induction to OVA, and worsened gluten-induced immunopathology in NOD/DQ8 mice. The results should prompt investigation on the link between SiO 2 exposure and food sensitivities in humans. https://doi.org/10.1289/EHP12758.
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Affiliation(s)
- Bruno Lamas
- Toxalim (Research Centre in Food Toxicology), Team Endocrinology and Toxicology of Intestinal Barrier, INRAE/ENVT/Paul Sabatier University, Toulouse, France
| | - Natalia Martins Breyner
- Toxalim (Research Centre in Food Toxicology), Team Endocrinology and Toxicology of Intestinal Barrier, INRAE/ENVT/Paul Sabatier University, Toulouse, France
| | - Yann Malaisé
- Toxalim (Research Centre in Food Toxicology), Team Endocrinology and Toxicology of Intestinal Barrier, INRAE/ENVT/Paul Sabatier University, Toulouse, France
| | - Mark Wulczynski
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Heather J. Galipeau
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Eric Gaultier
- Toxalim (Research Centre in Food Toxicology), Team Endocrinology and Toxicology of Intestinal Barrier, INRAE/ENVT/Paul Sabatier University, Toulouse, France
| | - Christel Cartier
- Toxalim (Research Centre in Food Toxicology), Team Endocrinology and Toxicology of Intestinal Barrier, INRAE/ENVT/Paul Sabatier University, Toulouse, France
| | - Elena F. Verdu
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Eric Houdeau
- Toxalim (Research Centre in Food Toxicology), Team Endocrinology and Toxicology of Intestinal Barrier, INRAE/ENVT/Paul Sabatier University, Toulouse, France
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Su W, Nong Q, Wu J, Fan R, Liang Y, Hu A, Gao Z, Liang W, Deng Q, Wang H, Xia L, Huang Y, Qin Y, Zhao N. Anti-inflammatory protein TSG-6 secreted by BMSCs attenuates silica-induced acute pulmonary inflammation by inhibiting NLRP3 inflammasome signaling in macrophages. Int J Biol Macromol 2023; 253:126651. [PMID: 37709227 DOI: 10.1016/j.ijbiomac.2023.126651] [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: 03/13/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/16/2023]
Abstract
Silicosis is a severe occupational lung disease caused by inhalation of silica particles. Unfortunately, there are currently limited treatment options available for silicosis. Recent advances have indicated that bone marrow mesenchymal stem cells (BMSCs) have a therapeutic effect on silicosis, but their efficacy and underlying mechanisms remain largely unknown. In this study, we focused on the early phase of silica-induced lung injury to investigate the therapeutic effect of BMSCs. Our findings demonstrated that BMSCs attenuated silica-induced acute pulmonary inflammation by inhibiting NLRP3 inflammasome pathways in lung macrophages. To further understand the mechanisms involved, we utilized RNA sequencing to analyze the transcriptomes of BMSCs co-cultured with silica-stimulated bone marrow-derived macrophages (BMDMs). The results clued tumor necrosis factor-stimulated gene 6 (TSG-6) might be a potentially key paracrine secretion factor released from BMSCs, which exerts a protective effect. Furthermore, the anti-inflammatory and inflammasome pathway inhibition effects of BMSCs were attenuated when TSG-6 expression was silenced, both in vivo and in vitro. Additionally, treatment with exogenous recombinant mouse TSG-6 (rmTSG-6) demonstrated similar effects to BMSCs in attenuating silica-induced inflammation. Overall, our findings suggested that BMSCs can regulate the activation of inflammasome in macrophages by secreting TSG-6, thereby protecting against silica-induced acute pulmonary inflammation both in vivo and in vitro.
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Affiliation(s)
- Wenyao Su
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China; Shunde Women and Children's Hospital (Maternity and Child Healthcare Hospital of Shunde Foshan), Guangdong Medical University, Foshan, Guangdong 528300, China; School of Public Health, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Qiying Nong
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China
| | - Jie Wu
- Emeishan Centerfor Disease Control and Prevention, Emeishan, Sichuan 614299, China
| | - Ruihong Fan
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China
| | - Yuanting Liang
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China; School of Public Health, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Anyi Hu
- Health Science Center of Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Zhongxiang Gao
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China
| | - Weihui Liang
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China
| | - Qifei Deng
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China
| | - Hailan Wang
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China
| | - Lihua Xia
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China
| | - Yongshun Huang
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China
| | - Yiru Qin
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China.
| | - Na Zhao
- Guangdong Province Hospital for Occupational Diseases Prevention and Treatment, Guangzhou 510300, China; School of Public Health, Guangzhou Medical University, Guangzhou, Guangdong 511436, China; School of Public Health, Southern Medical University, Guangzhou, Guangdong 510515, China.
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7
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Kodar K, Dangerfield EM, Foster AJ, Forsythe D, Ishizuka S, McConnell MJ, Yamasaki S, Timmer MSM, Stocker BL. Aryl-functionalised α,α'-Trehalose 6,6'-Glycolipid Induces Mincle-independent Pyroptotic Cell Death. Inflammation 2023:10.1007/s10753-023-01814-5. [PMID: 37140682 PMCID: PMC10359228 DOI: 10.1007/s10753-023-01814-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 03/16/2023] [Accepted: 03/31/2023] [Indexed: 05/05/2023]
Abstract
α,α'-Trehalose 6,6'-glycolipids have long been known for their immunostimulatory properties. The adjuvanticity of α,α'-trehalose 6,6'-glycolipids is mediated by signalling through the macrophage inducible C-type lectin (Mincle) and the induction of an inflammatory response. Herein, we present an aryl-functionalised trehalose glycolipid, AF-2, that leads to the release of cytokines and chemokines, including IL-6, MIP-2 and TNF-α, in a Mincle-dependent manner. Furthermore, plate-coated AF-2 also leads to the Mincle-independent production of IL-1β, which is unprecedented for this class of glycolipid. Upon investigation into the mode of action of plate-coated AF-2, it was observed that the treatment of WT and Mincle-/- bone marrow derived macrophages (BMDM), murine RAW264.7 cells, and human monocytes with AF-2 led to lytic cell death, as evidenced using Sytox Green and lactate dehydrogenase assays, and confocal and scanning electron microscopy. The requirement for functional Gasdermin D and Caspase-1 for IL-1β production and cell death by AF-2 confirmed pyroptosis as the mode of action of AF-2. The inhibition of NLRP3 and K+ efflux reduced AF-2 mediated IL-1β production and cell death, and allowed us to conclude that AF-2 leads to Capase-1 dependent NLRP3 inflammasome-mediated cell death. The unique mode of action of plate-coated AF-2 was surprising and highlights how the physical presentation of Mincle ligands can lead to dramatically different immunological outcomes.
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Affiliation(s)
- Kristel Kodar
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
- Centre for Biodiscovery, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
| | - Emma M Dangerfield
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
- Centre for Biodiscovery, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
| | - Amy J Foster
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
- Centre for Biodiscovery, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
| | - Devlin Forsythe
- Centre for Biodiscovery, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
- School of Biological Sciences, PO Box 600, Wellington, New Zealand
| | - Shigenari Ishizuka
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
- Laboratory of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
| | - Melanie J McConnell
- Centre for Biodiscovery, Victoria University of Wellington, PO Box 600, Wellington, New Zealand
- School of Biological Sciences, PO Box 600, Wellington, New Zealand
| | - Sho Yamasaki
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
- Laboratory of Molecular Immunology, Immunology Frontier Research Center, Osaka University, Suita, Osaka, Japan
- Division of Molecular Immunology, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Fukuoka, Japan
- Division of Molecular Immunology, Medical Mycology Research Center, Chiba University, Chiba, Japan
| | - Mattie S M Timmer
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand.
- Centre for Biodiscovery, Victoria University of Wellington, PO Box 600, Wellington, New Zealand.
| | - Bridget L Stocker
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, New Zealand.
- Centre for Biodiscovery, Victoria University of Wellington, PO Box 600, Wellington, New Zealand.
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Hou L, Zhu Z, Jiang F, Zhao J, Jia Q, Jiang Q, Wang H, Xue W, Wang Y, Tian L. Human umbilical cord mesenchymal stem cell-derived extracellular vesicles alleviated silica induced lung inflammation and fibrosis in mice via circPWWP2A/miR-223-3p/NLRP3 axis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 251:114537. [PMID: 36646008 DOI: 10.1016/j.ecoenv.2023.114537] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 12/28/2022] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
Silicosis is a progressive inflammatory disease with poorly defined mechanisms and limited therapeutic options. Recent studies found that microRNAs (miRNAs) and circular RNAs (circRNAs) were involved in the development of respiratory diseases; however, the function of non-coding RNAs in silicosis was still needed to be further explored. We found that miR-223-3p was significantly decreased in macrophages and lung tissues of mice after silica treatment, which were consistent with the results of GEO database microarray analysis. Notably, NLRP3 is a target gene downstream of miR-223-3p. And circular RNA PWWP2A (circPWWP2A) was significantly elevated after silica stimulation. To elucidate the role of these RNAs in silica-induced inflammation in macrophages and lung tissues, we investigated the upstream molecular mechanisms of circPWWP2A on the inflammatory response. The inhibitory effect of miR-223-3p on its target NLRP3 was suppressed by circPWWP2A, which led to lung fibrosis. Our study found that circPWWP2A could adsorb miR-223-3p to regulate NLRP3 after silica stimulation in pulmonary fibrosis. And our results revealed that the circPWWP2A-miR-223-3p-NLRP3 axis was potentially instrumental in managing silica-induced inflammation and fibrosis. Previous studies have demonstrated that human umbilical cord mesenchymal stem cell-derived extracellular vesicles (hucMSC-EVs) exhibit anti-inflammatory and anti-fibrotic effects in multiple organs. However, the potential effectiveness of hucMSC-EVs against silicosis or the underlying mechanisms of their biological outcomes remains unclear. Therefore, we used 3D culture technology to extract hucMSC-EVs and observed their effects in macrophages and lung tissues, respectively. According to the EVmiRNA database, miR-223-3p was abundant in MSC-EVs. In addition, hucMSC-EVs may modulate lung function, reduce the secretion of inflammatory factors (NLRP3, IL-1β, IL-18 and cleaved Caspase-1) and attenuate the deposition of fibrosis-related factors (Collagen Ⅰ, Collagen Ⅲ, fibronectin and α-SMA). In vitro results evinced that hucMSC-EVs reduced the inflammatory response of macrophages and restricted the activation and proliferation of fibroblasts. Moreover, our study showed that hucMSCs-EVs acted as a mediator to transfer miR-223-3p to suppress circPWWP2A, thereby alleviating pulmonary fibrosis through the NLRP3 signaling pathway. These data may provide potentially novel strategies for investigating the pathogenesis of silicosis and developing novel treatments for this disease.
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Affiliation(s)
- Lin Hou
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Zhonghui Zhu
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Fuyang Jiang
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Jing Zhao
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Qiyue Jia
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Qiyue Jiang
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Hongwei Wang
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Wenming Xue
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China
| | - Yan Wang
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China.
| | - Lin Tian
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing 100069, China.
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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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Pavan C, Escolano-Casado G, Bellomo C, Cananà S, Tomatis M, Leinardi R, Mino L, Turci F. Nearly free silanols drive the interaction of crystalline silica polymorphs with membranes: Implications for mineral toxicity. Front Chem 2023; 10:1092221. [PMID: 36726450 PMCID: PMC9884702 DOI: 10.3389/fchem.2022.1092221] [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: 11/07/2022] [Accepted: 12/30/2022] [Indexed: 01/18/2023] Open
Abstract
Crystalline silica (CS) is a well-known hazardous material that causes severe diseases including silicosis, lung cancer, and autoimmune diseases. However, the hazard associated to crystalline silica is extremely variable and depends on some specific characteristics, including crystal structure and surface chemistry. The crystalline silica polymorphs share the SiO2 stoichiometry and differentiate for crystal structure. The different crystal lattices in turn expose differently ordered hydroxyl groups at the crystal surface, i.e., the silanols. The nearly free silanols (NFS), a specific population of weakly interacting silanols, have been recently advanced as the key surface feature that governs recognition mechanisms between quartz and cell membrane, initiating toxicity. We showed here that the nearly free silanols occur on the other crystalline silica polymorphs and take part in the molecular interactions with biomembranes. A set of crystalline silica polymorphs, including quartz, cristobalite, tridymite, coesite, and stishovite, was physico-chemically characterized and the membranolytic activity was assessed using red blood cells as model membranes. Infrared spectroscopy in highly controlled conditions was used to profile the surface silanol topochemistry and the occurrence of surface nearly free silanols on crystalline silica polymorphs. All crystalline silica polymorphs, but stishovite were membranolytic. Notably, pristine stishovite did not exhibited surface nearly free silanols. The topochemistry of surface silanols was modulated by thermal treatments, and we showed that the occurrence of nearly free silanols paralleled the membranolytic activity for the crystalline silica polymorphs. These results provide a comprehensive understanding of the structure-activity relationship between nearly free silanols and membranolytic activity of crystalline silica polymorphs, offering a possible clue for interpreting the molecular mechanisms associated with silica hazard and bio-minero-chemical interfacial phenomena, including prebiotic chemistry.
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Affiliation(s)
- Cristina Pavan
- Department of Chemistry, University of Turin, Turin, Italy,“G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Turin, Turin, Italy,Louvain Centre for Toxicology and Applied Pharmacology, Institute of Experimental and Clinical Research, Université catholique de Louvain, Brussels, Belgium
| | - Guillermo Escolano-Casado
- Department of Chemistry, University of Turin, Turin, Italy,Nanostructured Interfaces and Surfaces Interdepartmental Centre, University of Turin, Turin, Italy
| | - Chiara Bellomo
- Department of Chemistry, University of Turin, Turin, Italy,“G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Turin, Turin, Italy
| | - Stefania Cananà
- Department of Chemistry, University of Turin, Turin, Italy,“G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Turin, Turin, Italy
| | - Maura Tomatis
- Department of Chemistry, University of Turin, Turin, Italy,“G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Turin, Turin, Italy
| | - Riccardo Leinardi
- Louvain Centre for Toxicology and Applied Pharmacology, Institute of Experimental and Clinical Research, Université catholique de Louvain, Brussels, Belgium
| | - Lorenzo Mino
- Department of Chemistry, University of Turin, Turin, Italy,Nanostructured Interfaces and Surfaces Interdepartmental Centre, University of Turin, Turin, Italy
| | - Francesco Turci
- Department of Chemistry, University of Turin, Turin, Italy,“G. Scansetti” Interdepartmental Centre for Studies on Asbestos and Other Toxic Particulates, University of Turin, Turin, Italy,*Correspondence: Francesco Turci,
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11
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Tyrkalska SD, Pedoto A, Martínez-López A, Ros-Lucas JA, Mesa-Del-Castillo P, Candel S, Mulero V. Silica crystals activate toll-like receptors and inflammasomes to promote local and systemic immune responses in zebrafish. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2023; 138:104523. [PMID: 36055417 DOI: 10.1016/j.dci.2022.104523] [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: 07/21/2022] [Revised: 08/24/2022] [Accepted: 08/24/2022] [Indexed: 06/15/2023]
Abstract
Silica crystals are potent activators of the inflammasome that cause a fibrotic lung disease, called silicosis, with no effective treatment available. We report here that injection of silica crystals into the hindbrain ventricle of zebrafish embryos led to the initiation of local and systemic immune responses driven through both Toll-like receptors (TLR)- and inflammasome-dependent signaling pathways, followed by induction of pro-fibrotic markers. Genetic and pharmacological analysis revealed that the Nlrp3 inflammasome regulated silica crystal-induced inflammation and pyroptotic cell death, but not emergency myelopoiesis. In addition, Cxcl8a/Cxcr2-dependent recruitment of myeloid cells to silica crystals was required to promote emergency myelopoiesis and systemic inflammation. The zebrafish model of silicosis developed here shed light onto the molecular mechanisms involved in the activation of the immune system by silica crystals.
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Affiliation(s)
- Sylwia D Tyrkalska
- Departmento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB)-Arrixaca, 30120, Murcia, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain.
| | - Annamaria Pedoto
- Departmento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB)-Arrixaca, 30120, Murcia, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - Alicia Martínez-López
- Departmento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB)-Arrixaca, 30120, Murcia, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - José A Ros-Lucas
- Instituto Murciano de Investigación Biosanitaria (IMIB)-Arrixaca, 30120, Murcia, Spain; Servicio de Neumología, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain
| | - Pablo Mesa-Del-Castillo
- Instituto Murciano de Investigación Biosanitaria (IMIB)-Arrixaca, 30120, Murcia, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain; Servicio de Reumatología, Hospital Clínico Universitario Virgen de la Arrixaca, 30120, Murcia, Spain
| | - Sergio Candel
- Departmento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB)-Arrixaca, 30120, Murcia, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain.
| | - Victoriano Mulero
- Departmento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100, Murcia, Spain; Instituto Murciano de Investigación Biosanitaria (IMIB)-Arrixaca, 30120, Murcia, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, 28029, Madrid, Spain.
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12
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Effects of early dexamethasone treatment on several markers of inflammation and fibrosis in an animal model of lung silicosis in rats – A pilot study. ACTA MEDICA MARTINIANA 2022. [DOI: 10.2478/acm-2022-0012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Abstract
Lung silicosis is primarily caused by inhalation of particles of silicon oxide (silica). Despite a huge progress in understanding the interactions among the pathomechanisms of lung silicosis in the last years, there is a lack of effective therapy. With respect to a wide therapeutic action of corticosteroids, the purpose of this pilot study was to evaluate early effects of dexamethasone on several markers of inflammation and lung fibrosis in a rat model of silicosis. The silicosis model was induced by a single transoral intratracheal instillation of silica (50 mg/ml/animal), while the controls received an equivalent volume of sterile saline. The treatment with intraperitoneal dexamethasone initiated the next day after the silica instillation and was given 2-times a week at a dose of 1 mg/kg, while the controls received an equivalent volume of saline. The animals were euthanized 14 or 28 days after the treatment onset. Total and differential counts of leukocytes in the blood and bronchoalveolar lavage (BAL) fluid were determined. The presence of collagen in the bronchioles and lung vessels was detected by Sirius red staining and a smooth muscle mass was detected by smooth muscle actin. In comparison to saline, the instillation of silica increased the total count of circulating leukocytes after 14 and 28 days of the experiment (both p<0.05), which was associated with higher counts of lymphocytes (p<0.05 after 14 days, p>0.05 after 28 days) and slight but non-significant increases in neutrophils and eosinophils (both p>0.05). Although the total cell count in the BAL fluid did not change significantly, the percentages and absolute counts of neutrophils, eosinophils, and lymphocytes (p<0.05, p<0.01 or p<0.001) elevated after 14 and 28 days of the experiment. Silica induced an accumulation of collagen in the bronchioles (p<0.001 after both 14 and 28 days) and pulmonary vessels (p<0.01 after both 14 and 28 days) and elevated a formation of smooth muscle mass (p<0.05 after 14 days, p<0.01 or p<0.001 after 28 days). Treatment with dexamethasone decreased circulating leukocytes (p<0.01) and lymphocytes (p<0.001) and increased neutrophils (p<0.05), which was associated with a slightly decreased total cell count in BAL (p>0.05), decline in lymphocytes (p<0.01), and slight decreases in neutrophils and eosinophils after 28 days of the treatment. Moreover, dexamethasone reduced the accumulation of collagen (p<0.01 after 14 days and p<0.001 after 28 days) and the formation of smooth muscle mass (p<0.01 for bronchioles and p>0.05 for vessels after 24 days, p<0.001 for both bronchioles and vessels after 28 days). In conclusion, early dexamethasone treatment mitigated silica-induced granulocytic-lymphocytic inflammation and decreased a formation of collagen and smooth muscle mass in the bronchiolar and vascular walls, demonstrating a therapeutic potential of dexamethasone in the lung silicosis.
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Weissman DN. Progressive massive fibrosis: An overview of the recent literature. Pharmacol Ther 2022; 240:108232. [PMID: 35732247 PMCID: PMC10053429 DOI: 10.1016/j.pharmthera.2022.108232] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 06/16/2022] [Indexed: 12/14/2022]
Abstract
This review provides an overview of literature addressing progressive massive fibrosis (PMF) from September 2009 to the present. Advances are described in understanding its pathophysiology, epidemiology of the occurrence of PMF and related conditions, the impact of PMF on pulmonary function, advances in imaging of PMF, and factors affecting progression of pneumoconiosis in dust-exposed workers to PMF. Basic advances in understanding the etiology of PMF are impeded by the lack of a well-accepted animal model for human PMF. Recent studies evaluating lung tissue samples and epidemiologic investigations support an important role for the silica component of coal mine dust in causing coal workers' pneumoconiosis and PMF in contemporary coal miners in the United States and for silica in causing silicosis and PMF in artificial stone workers throughout the world. Development of PMF is associated with substantial decline in pulmonary function relative to no disease or small opacity pneumoconiosis. In recent reports, computed tomography has had greater sensitivity for detecting PMF than chest x-ray. Magnetic resonance imaging shows promise in differentiating between PMF and lung cancer. Although PMF develops in dust-exposed workers without previously identified small opacity pneumoconiosis, the presence of small opacity pneumoconiosis increases the risk for progression to PMF, as does heavier dust exposure. Recent literature does not document any effective new treatments for PMF and new therapies to prevent and treat PMF are an important need.
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Affiliation(s)
- David N Weissman
- National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, United States of America.
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14
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Arezki Y, Rapp M, Lebeau L, Ronzani C, Pons F. Cationic Carbon Nanoparticles Induce Inflammasome-Dependent Pyroptosis in Macrophages via Lysosomal Dysfunction. FRONTIERS IN TOXICOLOGY 2022; 4:925399. [PMID: 35928766 PMCID: PMC9345407 DOI: 10.3389/ftox.2022.925399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/20/2022] [Indexed: 12/03/2022] Open
Abstract
Carbon nanomaterials, including carbon dots (CDs), form a growing family of engineered nanoparticles (NPs) with widespread applications. As the rapid expansion of nanotechnologies raises safety concerns, interaction of NPs with the immune system is receiving a lot of attention. Recent studies have reported that engineered NPs may induce macrophage death by pyroptosis. Therefore, this study investigated whether cationic CDs induce pyroptosis in human macrophages and assessed the role of inflammasome and lysosome in this process. Cationic CDs were synthetized by microwave-assisted pyrolysis of citric acid and high molecular weight branched polyethyleneimine. The NPs evoked a dose-dependent viability loss in THP-1-derived macrophages. A cell leakage, an increase in IL-1β secretion and an activation of caspase-1 were also observed in response to the NPs. Inhibition of caspase-1 decreased CD-induced cell leakage and IL-1β secretion, while restoring cell viability. Besides, CDs triggered swelling and loss of integrity of lysosome, and inhibition of the lysosomal enzyme cathepsin B decreased CD-induced IL-1β secretion. Thus, our data provide evidence that cationic CDs induce inflammasome-dependent pyroptosis in macrophages via lysosomal dysfunction.
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15
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Gene Expression Profiling of Mono- and Co-Culture Models of the Respiratory Tract Exposed to Crystalline Quartz under Submerged and Air-Liquid Interface Conditions. Int J Mol Sci 2022; 23:ijms23147773. [PMID: 35887123 PMCID: PMC9324045 DOI: 10.3390/ijms23147773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 07/09/2022] [Accepted: 07/12/2022] [Indexed: 11/16/2022] Open
Abstract
In vitro lung cell models like air-liquid interface (ALI) and 3D cell cultures have advanced greatly in recent years, being especially valuable for testing advanced materials (e.g., nanomaterials, fibrous substances) when considering inhalative exposure. Within this study, we established submerged and ALI cell culture models utilizing A549 cells as mono-cultures and co-cultures with differentiated THP-1 (dTHP-1), as well as mono-cultures of dTHP-1. After ALI and submerged exposures towards α-quartz particles (Min-U-Sil5), with depositions ranging from 15 to 60 µg/cm2, comparison was made with respect to their transcriptional cellular responses employing high-throughput RT-qPCR. A significant dose- and time-dependent induction of genes coding for inflammatory proteins, e.g., IL-1A, IL-1B, IL-6, IL-8, and CCL22, as well as genes associated with oxidative stress response such as SOD2, was observed, even more pronounced in co-cultures. Changes in the expression of similar genes were more pronounced under submerged conditions when compared to ALI exposure in the case of A549 mono-cultures. Hereby, the activation of the NF-κB signaling pathway and the NLRP3 inflammasome seem to play an important role. Regarding genotoxicity, neither DNA strand breaks in ALI cultivated cells nor a transcriptional response to DNA damage were observed. Altogether, the toxicological responses depended considerably on the cell culture model and exposure scenario, relevant to be considered to improve toxicological risk assessment.
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16
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Pulmonary Toxicity of Silica Linked to Its Micro- or Nanometric Particle Size and Crystal Structure: A Review. NANOMATERIALS 2022; 12:nano12142392. [PMID: 35889616 PMCID: PMC9318389 DOI: 10.3390/nano12142392] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [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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17
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Busch M, Ramachandran H, Wahle T, Rossi A, Schins RPF. Investigating the Role of the NLRP3 Inflammasome Pathway in Acute Intestinal Inflammation: Use of THP-1 Knockout Cell Lines in an Advanced Triple Culture Model. Front Immunol 2022; 13:898039. [PMID: 35911682 PMCID: PMC9326178 DOI: 10.3389/fimmu.2022.898039] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Accepted: 06/16/2022] [Indexed: 01/09/2023] Open
Abstract
The NLRP3 inflammasome plays an important role in intestinal homeostasis as well as inflammation. However, in vivo studies investigating the role of the NLRP3 inflammasome in inflammatory bowel disease (IBD) report contrasting results, leaving it unclear if the NLRP3 inflammasome augments or attenuates intestinal inflammation. To investigate the role of the NLRP3/caspase-1 pathway in a model of acute intestinal inflammation, we modified a previously established in vitro triple culture model of the healthy and inflamed intestine (Caco-2/HT29-MTX-E12/THP-1). Using THP-1 knockout cell lines, we analyzed how the NLRP3 inflammasome and its downstream enzyme caspase-1 (CASP1) affect inflammatory parameters including barrier integrity and cytotoxicity, as well as gene expression and secretion of pro-inflammatory cytokines and mucus. Furthermore, we investigated differences in inflammation-mediated cytotoxicity towards enterocyte-like (Caco-2) or goblet-like (HT29-MTX-E12) epithelial cells. As a complementary approach, inflammation-related cytotoxicity and gene expression of cytokines was analyzed in intestinal tissue explants from wildtype (WT) and Nlrp3-/- mice. Induction of intestinal inflammation impaired the barrier, caused cytotoxicity, and altered gene expression of pro-inflammatory cytokines and mucins in vitro, while the knockout of NLRP3 and CASP1 in THP 1 cells led to attenuation of these inflammatory parameters. The knockout of CASP1 tended to show a slightly stronger attenuating effect compared to the NLRP3 knockout model. We also found that the inflammation-mediated death of goblet-like cells is NLRP3/caspase-1 dependent. Furthermore, inflammation-related cytotoxicity and upregulation of pro-inflammatory cytokines was present in ileal tissue explants from WT, but not Nlrp3-/- mice. The here presented observations indicate a pro-inflammatory and adverse role of the NLRP3 inflammasome in macrophages during acute intestinal inflammation.
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18
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Microplastics Affect the Inflammation Pathway in Human Gingival Fibroblasts: A Study in the Adriatic Sea. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19137782. [PMID: 35805437 PMCID: PMC9266176 DOI: 10.3390/ijerph19137782] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/20/2022] [Accepted: 06/21/2022] [Indexed: 02/01/2023]
Abstract
The level of environmental microplastics in the sea is constantly increasing. They can enter the human body with food, be absorbed through the gut and have negative effects on the organism’s health after its digestion. To date, microplastics (MPs) are considered new environmental pollutants in the air sea and they are attracting wide attention. The possible toxic effects of MPs isolated at different sea depths of 1, 24 and 78 m were explored in an in vitro model of human gingival fibroblasts (hGFs). MPs isolated from the sea showed different size and were then divided into different sample groups: 1, 24 and 78 m. The results obtained revealed that MPs are able to activate the inflammatory pathway NFkB/MyD88/NLRP3. In detail, the exposure to MPs from 1 and 78 m led to increased levels of inflammatory markers NFkB, MyD88 and NLRP3 in terms of proteins and gene expression. Moreover, cells exposed to MPs showed a lower metabolic activity rate compared to unexposed cells. In conclusion, these findings demonstrate that the inflammation process is stimulated by MPs exposure, providing a new perspective to better understand the intracellular mechanism.
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19
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Pavlin M, Lojk J, Strojan K, Hafner-Bratkovič I, Jerala R, Leonardi A, Križaj I, Drnovšek N, Novak S, Veranič P, Bregar VB. The Relevance of Physico-Chemical Properties and Protein Corona for Evaluation of Nanoparticles Immunotoxicity-In Vitro Correlation Analysis on THP-1 Macrophages. Int J Mol Sci 2022; 23:6197. [PMID: 35682872 PMCID: PMC9181693 DOI: 10.3390/ijms23116197] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/26/2022] [Accepted: 05/30/2022] [Indexed: 02/01/2023] Open
Abstract
Alongside physiochemical properties (PCP), it has been suggested that the protein corona of nanoparticles (NPs) plays a crucial role in the response of immune cells to NPs. However, due to the great variety of NPs, target cells, and exposure protocols, there is still no clear relationship between PCP, protein corona composition, and the immunotoxicity of NPs. In this study, we correlated PCP and the protein corona composition of NPs to the THP-1 macrophage response, focusing on selected toxicological endpoints: cell viability, reactive oxygen species (ROS), and cytokine secretion. We analyzed seven commonly used engineered NPs (SiO2, silver, and TiO2) and magnetic NPs. We show that with the exception of silver NPs, all of the tested TiO2 types and SiO2 exhibited moderate toxicities and a transient inflammatory response that was observed as an increase in ROS, IL-8, and/or IL-1β cytokine secretion. We observed a strong correlation between the size of the NPs in media and IL-1β secretion. The induction of IL-1β secretion was completely blunted in NLR family pyrin domain containing 3 (NLRP3) knockout THP-1 cells, indicating activation of the inflammasome. The correlations analysis also implicated the association of specific NP corona proteins with the induction of cytokine secretion. This study provides new insights toward a better understanding of the relationships between PCP, protein corona, and the inflammatory response of macrophages for different engineered NPs, to which we are exposed on a daily basis.
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Grants
- J7-7424, J2-6758, J3-1746, J3-6794, J3-7494, Z4-8229, P1-0055, P3-0108, P1-0207, P4-0220, P2-0087, P4-0176, young researchers program and MRIC UL IP-0510 Infrastructure program Slovenian Research Agency
- ISO-FOOD (FP7-REGPOT) European Commission
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Affiliation(s)
- Mojca Pavlin
- Institute of Biophysics, Faculty of Medicine, University of Ljubljana, Vrazov trg 2, SI-1000 Ljubljana, Slovenia
- Group for Nano and Biotechnological Application, Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, SI-1000 Ljubljana, Slovenia; (J.L.); (K.S.); (V.B.B.)
| | - Jasna Lojk
- Group for Nano and Biotechnological Application, Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, SI-1000 Ljubljana, Slovenia; (J.L.); (K.S.); (V.B.B.)
| | - Klemen Strojan
- Group for Nano and Biotechnological Application, Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, SI-1000 Ljubljana, Slovenia; (J.L.); (K.S.); (V.B.B.)
| | - Iva Hafner-Bratkovič
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia; (I.H.-B.); (R.J.)
- EN-FIST Centre of Excellence, Trg Osvobodilne fronte 13, SI-1000 Ljubljana, Slovenia
| | - Roman Jerala
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Hajdrihova 19, SI-1000 Ljubljana, Slovenia; (I.H.-B.); (R.J.)
- EN-FIST Centre of Excellence, Trg Osvobodilne fronte 13, SI-1000 Ljubljana, Slovenia
| | - Adrijana Leonardi
- Department of Molecular and Biomedical Sciences, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; (A.L.); (I.K.)
| | - Igor Križaj
- Department of Molecular and Biomedical Sciences, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; (A.L.); (I.K.)
| | - Nataša Drnovšek
- Department for Nanostructured Materials, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; (N.D.); (S.N.)
| | - Saša Novak
- Department for Nanostructured Materials, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia; (N.D.); (S.N.)
| | - Peter Veranič
- Institute of Cell Biology, Faculty of Medicine, University of Ljubljana, Vrazov trg 2, SI-1000 Ljubljana, Slovenia;
| | - Vladimir Boštjan Bregar
- Group for Nano and Biotechnological Application, Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, SI-1000 Ljubljana, Slovenia; (J.L.); (K.S.); (V.B.B.)
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20
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Li Y, Jin F, Li T, Yang X, Cai W, Li S, Gao X, Mao N, Liu H, Xu H, Yang F. Minute Cellular Nodules as Early Lesions in Rats with Silica Exposure via Inhalation. Vet Sci 2022; 9:vetsci9060251. [PMID: 35737303 PMCID: PMC9227695 DOI: 10.3390/vetsci9060251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/21/2022] [Accepted: 05/23/2022] [Indexed: 12/01/2022] Open
Abstract
Mechanisms of silicosis have yet to be clarified, and pathological conditions are inaccurately described in some experimental studies on silicosis. This study was aimed at describing initial lesions in silicosis, as observed in rats with silica exposure via inhalation, and major histopathologic alterations. Male Wistar rats were exposed to silica for 24 weeks. Hematoxylin and eosin staining indicated the presence of “cellular nodule+ macrophage alveolitis” in rats exposed to silica from the 2–16 weeks time points and “fibrotic cellular + cellular nodule” in rats exposed to silica via inhalation for 24 weeks. By immunohistochemistry, the following were noted: a continual increase in the positive expression of CD68 in macrophages in the lungs of rats exposed to silica; hyperplasia in alveolar type II cells (AT2); loss of original phenotypes in fibrotic cellular nodules, macrophages, and AT2 cells; loss of endothelial cells in silicotic nodules; and positive expression of α-smooth muscle actin in macrophages. Typical pathological changes in silicosis were also summarized. Among these changes were macrophage alveolitis, cellular nodules, and fibrotic cellular nodules, including an increase in minute cellular nodules in the early stages and the formation of fibrotic cellular nodules in the late stages.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Hong Xu
- Correspondence: (H.X.); (F.Y.); Tel.: +86-151-33967479 (H.X.); +86-188-32571018 (F.Y.)
| | - Fang Yang
- Correspondence: (H.X.); (F.Y.); Tel.: +86-151-33967479 (H.X.); +86-188-32571018 (F.Y.)
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21
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Song MY, Wang JX, Sun YL, Han ZF, Zhou YT, Liu Y, Fan TH, Li ZG, Qi XM, Luo Y, Yang PR, Li BC, Zhang XR, Wang J, Wang C. Tetrandrine alleviates silicosis by inhibiting canonical and non-canonical NLRP3 inflammasome activation in lung macrophages. Acta Pharmacol Sin 2022; 43:1274-1284. [PMID: 34417574 PMCID: PMC9061833 DOI: 10.1038/s41401-021-00693-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 05/07/2021] [Indexed: 12/02/2022] Open
Abstract
Silicosis caused by inhalation of silica particles leads to more than ten thousand new occupational exposure-related deaths yearly. Exacerbating this issue, there are currently few drugs reported to effectively treat silicosis. Tetrandrine is the only drug approved for silicosis treatment in China, and despite more than decades of use, its efficacy and mechanisms of action remain largely unknown. Here, in this study, we established silicosis mouse models to investigate the effectiveness of tetrandrine of early and late therapeutic administration. To this end, we used multiple cardiopulmonary function test, as well as markers for inflammation and fibrosis. Moreover, using single cell RNA sequencing and transcriptomics of lung tissue and quantitative microarray analysis of serum from silicosis and control mice, our results provide a novel description of the target pathways for tetrandrine. Specifically, we found that tetrandrine attenuated silicosis by inhibiting both the canonical and non-canonical NLRP3 inflammasome pathways in lung macrophages. Taken together, our work showed that tetrandrine yielded promising results against silicosis-associated inflammation and fibrosis and further lied the groundwork for understanding its molecular targets. Our results also facilitated the wider adoption and development of tetrandirne, potentially accelerating a globally accepted therapeutic strategy for silicosis.
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Affiliation(s)
- Mei-yue Song
- grid.24695.3c0000 0001 1431 9176Beijing University of Chinese Medicine, Beijing, 100029 China ,grid.415954.80000 0004 1771 3349Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, 100029 China ,grid.415954.80000 0004 1771 3349National Clinical Research Center for Respiratory Diseases, Beijing, 100029 China
| | - Jia-xin Wang
- grid.12527.330000 0001 0662 3178Tsinghua-Peking Center for Life Sciences, Department of Biology, College of Medicine, Tsinghua University, Beijing, 100084 China
| | - You-liang Sun
- grid.12527.330000 0001 0662 3178School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084 China
| | - Zhi-fa Han
- grid.12527.330000 0001 0662 3178Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, 100084 China
| | - Yi-tian Zhou
- grid.506261.60000 0001 0706 7839Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100730 China ,grid.506261.60000 0001 0706 7839Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100730 China ,grid.506261.60000 0001 0706 7839Peking Union Medical College, MD Program, Beijing, 100730 China
| | - Ying Liu
- grid.506261.60000 0001 0706 7839Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100730 China
| | - Tian-hui Fan
- grid.506261.60000 0001 0706 7839Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100730 China
| | - Zhao-guo Li
- grid.412463.60000 0004 1762 6325Department of Respiratory, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086 China
| | - Xian-mei Qi
- grid.506261.60000 0001 0706 7839Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100730 China
| | - Ya Luo
- grid.506261.60000 0001 0706 7839Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100730 China
| | - Pei-ran Yang
- grid.506261.60000 0001 0706 7839Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100730 China
| | - Bai-cun Li
- grid.506261.60000 0001 0706 7839Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100730 China
| | - Xin-ri Zhang
- grid.452461.00000 0004 1762 8478Department of Pulmonary and Critical Care Medicine, The First Hospital of Shanxi Medical University, Taiyuan, 030001 China
| | - Jing Wang
- Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100730, China.
| | - Chen Wang
- Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Beijing, 100730, China.
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22
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Early Identification, Accurate Diagnosis, and Treatment of Silicosis. Can Respir J 2022; 2022:3769134. [PMID: 35509892 PMCID: PMC9061058 DOI: 10.1155/2022/3769134] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 04/05/2022] [Accepted: 04/15/2022] [Indexed: 12/04/2022] Open
Abstract
Silicosis is a global problem, and it has brought about great burdens to society and patients' families. The etiology of silicosis is clear, preventable, and controllable, but the onset is hidden and the duration is long. Thus, it is difficult to diagnose it early and treat it effectively, leaving workers unaware of the consequences of dust exposure. As such, a lack of details in the work history and a slow progression of lung disease contribute to the deterioration of patients until silicosis has advanced to fibrosis. These issues are the key factors impeding the diagnosis and the treatment of silicosis. This article reviews the literature on the early identification, diagnosis, and treatment of silicosis as well as analyzes the difficulties in the diagnosis and the treatment of silicosis and discusses its direction of future development.
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23
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Song Z, Wang L, Cao Y, Liu Z, Zhang M, Zhang Z, Jiang S, Fan R, Hao T, Yang R, Wang B, Guan Z, Zhu L, Liu Z, Zhang S, Zhao L, Xu Z, Xu H, Dai G. Isoandrographolide inhibits NLRP3 inflammasome activation and attenuates silicosis in mice. Int Immunopharmacol 2022; 105:108539. [DOI: 10.1016/j.intimp.2022.108539] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/30/2021] [Accepted: 01/10/2022] [Indexed: 11/05/2022]
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24
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Lam M, Mansell A, Tate MD. Another One Fights the Dust - Targeting the NLRP3 Inflammasome for the Treatment of Silicosis. Am J Respir Cell Mol Biol 2022; 66:601-611. [PMID: 35290170 DOI: 10.1165/rcmb.2021-0545tr] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Silicosis is a multifaceted lung disease, characterised by persistent inflammation and structural remodelling. Despite its poor prognosis, there are no treatments currently available for patients with silicosis. Recent pre-clinical findings in models of lung fibrosis have suggested a major role for the nucleotide binding domain and leucine-rich repeat pyrin domain containing 3 (NLRP3) inflammasome in silica-driven inflammation and fibrosis. This review outlines the beneficial effects of targeting the NLRP3 inflammasome in in vitro cell experiments and in in vivo animal models, whereby inflammation and fibrosis are abrogated following NLRP3 inflammasome inhibition. While preclinical evidence is promising, studies which explore NLRP3 inflammasomes in the clinical setting are warranted. In particular, there is still a need to identify biomarkers which may be helpful for the early detection of silicosis and to fully elucidate mechanisms underlying these beneficial effects to further develop or repurpose existing anti-NLRP3 drugs as novel treatments that limit disease progression.
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Affiliation(s)
- Maggie Lam
- Hudson Institute of Medical Research Centre for Innate Immunity and Infectious Diseases, 366840, Clayton, Victoria, Australia.,Monash University , Department of Molecular and Translational Sciences, Clayton, Victoria, Australia
| | - Ashley Mansell
- Hudson Institute of Medical Research Centre for Innate Immunity and Infectious Diseases, 366840, Clayton, Victoria, Australia.,Monash Univerisity, Department of Molecular and Translational Sciences, Clayton, Victoria, Australia.,Adiso Therapeutics Inc, Concord, Massachusetts, United States
| | - Michelle D Tate
- Hudson Institute of Medical Research Centre for Innate Immunity and Infectious Diseases, 366840, Clayton, Victoria, Australia.,Monash University, Department of Molecular and Translational Sciences, Clayton, Victoria, Australia;
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25
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Mu Y, Sun J, Li Z, Zhang W, Liu Z, Li C, Peng C, Cui G, Shao H, Du Z. Activation of pyroptosis and ferroptosis is involved in the hepatotoxicity induced by polystyrene microplastics in mice. CHEMOSPHERE 2022; 291:132944. [PMID: 34793849 DOI: 10.1016/j.chemosphere.2021.132944] [Citation(s) in RCA: 94] [Impact Index Per Article: 47.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/31/2021] [Accepted: 11/14/2021] [Indexed: 05/27/2023]
Abstract
Microplastics (MPs) are new environmental pollutants and have received widespread attention in recent years, but the toxicity of the MPs remains to be fully elucidated. To explore the effect of MPs on hepatotoxicity in mice and unravel the mechanism of pyroptosis and ferroptosis in the process of liver injury, we treated mice with 5.0 μm polypropylene microplastics (MPs) at 0.1, 0.5 and 1 mg/mL for 4 weeks. Results revealed that MPs could damage liver structure and function with broken and reduced mitochondrial cristae, as well as increased levels of aspartate minotransferase (AST), alanine aminotransferase (ALT), AST/ALT, alkaline phosphatase (ALP) and lactate dehydrogenase (LDH). Treatment with MPs resulted in pyroptosis as evidenced by increasing expressions of interleukin IL-1β, IL-18. Additionally, MPs were shown to induce the NOD-like receptor protein 3 (NLRP3) inflammasomes and apoptosis associated speck-like protein (ASC) containing a caspase recruitment domain activation in liver tissue, enabling activation of Caspase-1-dependent signaling pathway induced by inflammatory stimuli resulting from oxidative stress. In addition, the increase of malondialdehyde (MDA) and decrease of glutathione (GSH) and superoxide dismutase (SOD) in the liver indicated that MPs could induce oxidative damage. Moreover, MPs induced lipid peroxidation in the liver of mice could activate the expression of ferroptosis related proteins, including iron metabolism, such as transferrin receptor (TFRC) was active but ferritin heavy chain 1 (FTH1) was inhibited; amino acid metabolism, such as XCT system and glutathione peroxidase 4 (GPX4) were inhibited; lipid metabolism, such as acyl-CoA synthetase long-chain family member 4 (ACSL4) was inhibited. Collectively, these findings evidenced that pyroptosis and ferroptosis occurred in MPs-induced liver injury accompanied by intense oxidative stress and inflammation.
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Affiliation(s)
- Yingwen Mu
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji'nan, 250062, Shandong, People's Republic of China
| | - Jiayin Sun
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji'nan, 250062, Shandong, People's Republic of China
| | - Ziyuan Li
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji'nan, 250062, Shandong, People's Republic of China
| | - Wanxin Zhang
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji'nan, 250062, Shandong, People's Republic of China
| | - Zuodong Liu
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji'nan, 250062, Shandong, People's Republic of China
| | - Chao Li
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji'nan, 250062, Shandong, People's Republic of China
| | - Cheng Peng
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji'nan, 250062, Shandong, People's Republic of China; Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, 4108, Brisbane, Queensland, Australia
| | - Guanqun Cui
- Department of Respiratory Medicine, Qilu Children's Hospital of Shandong University, 250022, Ji'nan, Shandong Province, People's Republic of China.
| | - Hua Shao
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji'nan, 250062, Shandong, People's Republic of China.
| | - Zhongjun Du
- Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Ji'nan, 250062, Shandong, People's Republic of China.
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26
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Song M, Wang J, Sun Y, Pang J, Li X, Liu Y, Zhou Y, Yang P, Fan T, Liu Y, Li Z, Qi X, Li B, Zhang X, Wang J, Wang C. Inhibition of gasdermin D-dependent pyroptosis attenuates the progression of silica-induced pulmonary inflammation and fibrosis. Acta Pharm Sin B 2022; 12:1213-1224. [PMID: 35530143 PMCID: PMC9069405 DOI: 10.1016/j.apsb.2021.10.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/12/2021] [Accepted: 09/30/2021] [Indexed: 12/13/2022] Open
Abstract
Silicosis is a leading cause of occupational disease-related morbidity and mortality worldwide, but the molecular basis underlying its development remains unclear. An accumulating body of evidence supports gasdermin D (GSDMD)-mediated pyroptosis as a key component in the development of various pulmonary diseases. However, there is little experimental evidence connecting silicosis and GSDMD-driven pyroptosis. In this work, we investigated the role of GSDMD-mediated pyroptosis in silicosis. Single-cell RNA sequencing of healthy and silicosis human and murine lung tissues indicated that GSDMD-induced pyroptosis in macrophages was relevant to silicosis progression. Through microscopy we then observed morphological alterations of pyroptosis in macrophages treated with silica. Measurement of interleukin-1β release, lactic dehydrogenase activity, and real-time propidium iodide staining further revealed that silica induced pyroptosis of macrophages. Additionally, we verified that both canonical (caspase-1-mediated) and non-canonical (caspase-4/5/11-mediated) signaling pathways mediated silica-induced pyroptosis activation, in vivo and in vitro. Notably, Gsdmd knockout mice exhibited dramatically alleviated silicosis phenotypes, which highlighted the pivotal role of pyroptosis in this disease. Taken together, our results demonstrated that macrophages underwent GSDMD-dependent pyroptosis in silicosis and inhibition of this process could serve as a viable clinical strategy for mitigating silicosis.
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27
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Chen S, Han B, Geng X, Li P, Lavin MF, Yeo AJ, Li C, Sun J, Peng C, Shao H, Du Z. Microcrystalline silica particles induce inflammatory response via pyroptosis in primary human respiratory epithelial cells. ENVIRONMENTAL TOXICOLOGY 2022; 37:385-400. [PMID: 34766707 DOI: 10.1002/tox.23405] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 10/28/2021] [Accepted: 10/30/2021] [Indexed: 06/13/2023]
Abstract
The mechanism of the sterile inflammatory response in the respiratory tract induced by exposure to sterile particles has not been fully elucidated. The aim of our study is to explore the earlier events in initiating inflammatory response at molecular and cellular level in primary cultured human airway epithelial cells (AEC) exposed to silica particles in order to provide information for earlier diagnosis and prevention of silica particle-induced toxicity as well as possible information on the genesis of silicosis. We isolated primary AEC from three healthy adults and treated them with silica particles at different concentrations for 48 h. We found evidence for silica-induced inflammasome activation by the co-localization of Caspase-1 and NLRP3, as well as increased levels of IL-1β and IL-18. Lactate dehydrogenase and NucGreen analysis proved the occurrence of pyroptosis. High throughput mRNA sequencing showed that the inflammatory response and NF-κB signaling pathways were significantly enriched in gene ontology and Kyoto encyclopedia of genes and genomes analysis, and pyroptosis-related genes were up-regulated. The miR-455-3p and five lncRNAs (LOC105375913, NEAT1, LOC105375181, LOC100506098, and LOC105369370) were verified as key factors related to the mechanism by ceRNA network analysis. LOC105375913 was first discovered to be associated with inflammation in AEC. These data suggest that microcrystalline silica can induce significant inflammation and pyroptosis in human primary AEC through NLRP3 inflammasome pathway and NF-κB signaling pathway at both the gene and protein levels, and the possible mechanism could be miR-455-3p mediated ceRNA hypothesis. Our data provide a method for the studies of the respiratory toxicity of fine particulate matter and the pathogenesis of early silicosis. The miR-455-3p and five lncRNAs related ceRNA network might be the toxicity mechanism of microcrystalline silica particles to AEC.
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Affiliation(s)
- Shangya Chen
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
- Department of Basic Research & International Cooperation, Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangzhou, Guangdong, China
| | - Bing Han
- Department of Head and Neck Surgery, Affiliated Hospital of Shandong Academy of Medical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Xiao Geng
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Peng Li
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Martin F Lavin
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
- The University of Queensland Centre for Clinical Research (UQCCR), The University of Queensland, Brisbane, Australia
| | - Abrey J Yeo
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
- The University of Queensland Centre for Clinical Research (UQCCR), The University of Queensland, Brisbane, Australia
| | - Chao Li
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Jiayin Sun
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Cheng Peng
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
- Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, Brisbane, Australia
| | - Hua Shao
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Zhongjun Du
- Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China
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28
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Peukert K, Steinhagen F, Fox M, Feuerborn C, Schulz S, Seeliger B, Schuss P, Schneider M, Frede S, Sauer A, Putensen C, Latz E, Wilhelm C, Bode C. Tetracycline ameliorates silica-induced pulmonary inflammation and fibrosis via inhibition of caspase-1. Respir Res 2022; 23:21. [PMID: 35130879 PMCID: PMC8822850 DOI: 10.1186/s12931-022-01937-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 01/20/2022] [Indexed: 01/24/2023] Open
Abstract
Background Inhalation of dust containing silica particles is associated with severe pulmonary inflammation and lung injury leading to chronic silicosis including fibrotic remodeling of the lung. Silicosis represents a major global health problem causing more than 45.000 deaths per year. The inflammasome-caspase-1 pathway contributes to the development of silica-induced inflammation and fibrosis via IL-1β and IL-18 production. Recent studies indicate that tetracycline can be used to treat inflammatory diseases mediated by IL-1β and IL-18. Therefore, we hypothesized that tetracycline reduces silica-induced lung injury and lung fibrosis resulting from chronic silicosis via limiting IL-1β and IL-18 driven inflammation. Methods To investigate whether tetracycline is a therapeutic option to block inflammasome-caspase-1 driven inflammation in silicosis, we incubated macrophages with silica alone or combined with tetracycline. The in vivo effect of tetracycline was determined after intratracheal administration of silica into the mouse lung. Results Tetracycline selectively blocks IL-1β production and pyroptotic cell death via inhibition of caspase-1 in macrophages exposed to silica particles. Consistent, treatment of silica-instilled mice with tetracycline significantly reduced pulmonary caspase-1 activation as well as IL-1β and IL-18 production, thereby ameliorating pulmonary inflammation and lung injury. Furthermore, prolonged tetracycline administration in a model of chronic silicosis reduced lung damage and fibrotic remodeling. Conclusions These findings suggest that tetracycline inhibits caspase-1-dependent production of IL-1β in response to silica in vitro and in vivo. The results were consistent with tetracycline reducing silica-induced pulmonary inflammation and chronic silicosis in terms of lung injury and fibrosis. Thus, tetracycline could be effective in the treatment of patients with silicosis as well as other diseases involving silicotic inflammation.
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29
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Zhai X, Wang J, Sun J, Xin L. PM 2.5 induces inflammatory responses via oxidative stress-mediated mitophagy in human bronchial epithelial cells. Toxicol Res (Camb) 2022; 11:195-205. [PMID: 35237424 PMCID: PMC8882786 DOI: 10.1093/toxres/tfac001] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/29/2021] [Accepted: 12/30/2021] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Fine particulate matter (PM2.5) is a ubiquitous air pollutant, and it has been reported to be closely associated with lung inflammatory injury. In this study, the potential molecular mechanisms underlying PM2.5-induced cellular inflammation in human bronchial epithelial (BEAS-2B) cells were investigated. MATERIALS AND METHODS Ambient PM2.5 particulates from Suzhou, China, were collected and re-suspended in ultrapure water. Cellular damages, characterized by oxidative stress, mitochondrial injury, and inflammatory cytokine production, were determined in 24 h PM2.5-treated BEAS-2B cells with or without 3-methyladenine (3-MA; autophagy inhibitor) pretreatment. Biomarkers related to oxidative damage, inflammatory injury and autophagy signaling pathways were also measured. RESULTS Uptake of PM2.5 in BEAS-2B cells induced cellular oxidative damage, mitochondrial injury, and inflammatory responses as indicated by a significant decrease in GSH/GSSG ratio, increased MDA content, dilated mitochondria with loss and rupture of crista, and production of inflammatory cytokines. Activation of Nrf-2/TXNIP-mediated NF-κB and Bnip3L/NIX-dependent mitophagy signaling pathways, as well as accumulation of autophagosomes and autolysosomes, were also observed. A 6 h pretreatment of 3-MA increased PM2.5-induced oxidative damage and cellular inflammation as indicated by increasing protein levels of HO-1, TXNIP, Bnip3L/NIX and IL-8 gene expression. CONCLUSIONS PM2.5 induced cellular inflammatory injury by oxidative stress, mitochondrial dysfunction, and mitophagy initiation. Although induction of Bnip3L/NIX-mediated mitophagy in BEAS-2B cells appeared to confer protection in response to PM2.5, dysfunction of autophagic flux may be a critical contributor to defective mitophagy and cellular inflammatory response.
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Affiliation(s)
| | | | - Jiaojiao Sun
- School of Public Health, Medical College of Soochow University, 199 Renai Road, Suzhou 215123, Jiangsu, China
| | - Lili Xin
- Corresponding author: School of Public Health, Medical College of Soochow University, 199 Renai Road, Suzhou 215123, Jiangsu, China.
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30
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Niu Y, Yang S, Hu X. Activation of canonical inflammasome complex by acute silica exposure in experimental rat model. Toxicol Res (Camb) 2022; 11:162-168. [PMID: 35237420 PMCID: PMC8882782 DOI: 10.1093/toxres/tfab127] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/18/2021] [Accepted: 12/11/2021] [Indexed: 01/11/2023] Open
Abstract
Silicosis is a chronic irreversible pulmonary disease caused by the inhalation of silica crystals in occupational settings in most cases. Persistent inflammation in the alveolar space is considered to be the major reason for tissue damage and lung fibrogenesis. The mechanisms by which silica exposure activates immune cells are not well understood. Here, we employed an in vivo silicosis disease model by intratracheal instillation of a large dose of silica suspension in rats and explored the involvement of inflammasome activation. Marked leukocyte infiltration and edema were observed 3 days following silica exposure in treated animals compared to controls. Using this model, we compared the expression of inflammasome sensors (AIM2 and NLRP3) and effector protein (caspase-1) by western blot and immunohistochemical staining using the lung homogenates and lung tissue sections. Our results demonstrated that following acute silica exposure, AIM2, NLRP3 and caspase-1 expressions were increased in macrophages or/and lung epithelial cells compared to control animals. We also analyzed interleukin 1β expression using lung homogenates, and significant increase in interleukin 1β was observed in 3-day silica-exposed rats. The activation of inflammasome sensors AIM2 and NLRP3 suggested to us that blocking these activators may attenuate silica-associated tissue damage and inflammation.
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Affiliation(s)
- Yingmei Niu
- Correspondence address. Occupational Disease and Toxicology Department, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China. E-mail:
| | - Shuangli Yang
- Occupational Disease and Toxicology Department, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - Xiumei Hu
- Department of Pathology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
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31
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Thompson JA, Krajnak K, Johnston RA, Kashon ML, McKinney W, Fedan JS. High-fat western diet-consumption alters crystalline silica-induced serum adipokines, inflammatory cytokines and arterial blood flow in the F344 rat. Toxicol Rep 2022; 9:12-21. [PMID: 34976743 PMCID: PMC8683385 DOI: 10.1016/j.toxrep.2021.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 12/01/2021] [Accepted: 12/04/2021] [Indexed: 02/06/2023] Open
Abstract
Silica reduced serum leptin and adiponectin, no effects on body or fat pad weight. HFWD-consumption altered pro-inflammatory cytokines in silica-exposed animals. Silica altered pulse frequency; HFWD increased mean blood flow; effects additive. HFWD affected silica-induced metabolic effects.
Adipose tissue (AT) plays a central role in the maintenance of whole-body energy homeostasis through release of adipokines. High-fat Western diet (HFWD)-consumption contributes to obesity, disruption of adipocyte metabolism, chronic systemic inflammation, and metabolic dysfunction (MetDys). MetDys is associated with impaired lung function, pulmonary hypertension, and asthma. Thirty-five percent of adults in the U.S. have MetDys, yet the impact of MetDys on susceptibility to occupational hazards is unknown. The aim of this study was to determine the potential of HFWD-consumption to alter inhaled crystalline silica dust-induced metabolic responses. Six-wk old male F344 rats were fed a HFWD (45 kcal % fat, sucrose 22.2 % by weight) or standard rat chow (STD, controls), and exposed to silica-inhalation (6 h/d, 5 d/wk, 39 d; Min-U-Sil 5®, 15 mg/m3) or filtered air. Indices of MetDys and systemic inflammation were measured at 0, 4, and 8 wk following cessation of silica exposure. At 8 wk post-exposure, silica reduced serum leptin and adiponectin levels, and increased arterial pulse frequency. HFWD-consumption induced weight gain, altered adipokines, liver, kidney, and pancreatic function, and increased tail artery blood flow. At 8 wk in HFWD + SIL-treated animals, the levels of serum pro-inflammatory cytokines (IFN-γ, CXCL-1, TNF-α, IL-1β, IL-4, IL-5, IL-6, IL-10 and IL-13) were increased compared to STD + SIL but were less than HFWD + AIR-induced levels. In conclusion, consumption of a HFWD altered silica-induced metabolic responses and silica exposure disrupted AT endocrine function. These findings demonstrate previously unknown interactions between HFWD-consumption and occupational silica exposure.
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Affiliation(s)
- Janet A Thompson
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States
| | - Kristine Krajnak
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States
| | - Richard A Johnston
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States
| | - Michael L Kashon
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States
| | - Walter McKinney
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States
| | - Jeffrey S Fedan
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, United States
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Thompson JA, Johnston RA, Price RE, Hubbs AF, Kashon ML, McKinney W, Fedan JS. High-fat Western diet consumption exacerbates silica-induced pulmonary inflammation and fibrosis. Toxicol Rep 2022; 9:1045-1053. [PMID: 35936059 PMCID: PMC9350629 DOI: 10.1016/j.toxrep.2022.04.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 12/02/2022] Open
Abstract
Consumption of a high-fat Western diet (HFWD) contributes to obesity, disrupted adipose endocrine function, and development of metabolic dysfunction (MetDys). Impaired lung function, pulmonary hypertension, and asthma are all associated with MetDys. Over 35% of adults in the U.S. have MetDys, yet interactions between MetDys and hazardous occupational inhalation exposures are largely unknown. Occupational silica-inhalation leads to chronic lung inflammation, progressive fibrosis, and significant respiratory morbidity and mortality. In this study, we aim to determine the potential of HFWD-consumption to alter silica-induced inflammatory responses in the lung. Six-wk old male F344 rats fed a high fat Western diet (HFWD; 45 kcal % fat, sucrose 22.2% by weight) to induce MetDys, or standard rat chow (STD, controls) for 16 wk were subsequently exposed to silica (6 h/d, 5 d/wk, 39 d; Min-U-Sil 5®, 15 mg/m3) or filtered air; animals remained on their assigned diet for the study duration. Indices of lung inflammation and histopathologic assessment of lung tissue were quantified at 0, 4, and 8 wk after cessation of exposure. Combined HFWD+silica exposure increased bronchoalveolar lavage (BAL) total cells, leukocytes, and BAL lactate dehydrogenase compared to STD+silica exposure controls at all timepoints. HFWD+silica exposure increased BAL proinflammatory cytokines at 4 and 8 wk compared to STD+silica exposure. At 8 wk, histopathological analysis confirmed that alveolitis, epithelial cell hypertrophy and hyperplasia, lipoproteinosis, fibrosis, bronchoalveolar lymphoid hyperplasia and granulomas were exacerbated in the HFWD+silica-exposed group compared to STD+silica-exposed controls. Our results suggest an increased susceptibility to silica-induced lung disease caused by HFWD consumption. HFWD exacerbates silica (SIL)-induced lung injury at 8 wk post-exposure. HFWD+SIL increases BAL cells and LDH compared to STD+SIL. HFWD+SIL increases BAL proinflammatory cytokines compared to STD+SIL. Histopathology confirms exacerbated lung injury HFWD+silica treatment.
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Extracellular cathepsin Z signals through the α 5 integrin and augments NLRP3 inflammasome activation. J Biol Chem 2021; 298:101459. [PMID: 34864055 PMCID: PMC8753182 DOI: 10.1016/j.jbc.2021.101459] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 11/21/2021] [Accepted: 11/22/2021] [Indexed: 12/31/2022] Open
Abstract
Respiratory silicosis is a preventable occupational disease that develops secondary to the aspiration of crystalline silicon dioxide (silica) into the lungs, activation of the NLRP3 inflammasome, and IL-1β production. Cathepsin Z has been associated with the development of inflammation and IL-1β production; however, the mechanism of how cathepsin Z leads to IL-1β production is unknown. Here, the requirement for cathepsin Z in silicosis was determined using WT mice and mice deficient in cathepsin Z. The activation of the NLRP3 inflammasome in macrophages was studied using WT and cathepsin Z-deficient bone marrow-derived murine dendritic cells and the human monocytic cell line THP-1. The cells were activated with silica, and IL-1β release was determined using enzyme-linked immunosorbent assay or IL-1β bioassays. The relative contribution of the active domain or integrin-binding domain of cathepsin Z was studied using recombinant cathepsin Z constructs and the α5 integrin neutralizing antibody. We report that the lysosomal cysteine protease cathepsin Z potentiates the development of inflammation associated with respiratory silicosis by augmenting NLRP3 inflammasome-derived IL-1β expression in response to silica. The secreted cathepsin Z functions nonproteolytically via the internal integrin-binding domain to impact caspase-1 activation and the production of active IL-1β through integrin α5 without affecting the transcription levels of NLRP3 inflammasome components. This work reveals a regulatory pathway for the NLRP3 inflammasome that occurs in an outside-in fashion and provides a link between extracellular cathepsin Z and inflammation. Furthermore, it reveals a level of NLRP3 inflammasome regulation that has previously only been found downstream of extracellular pathogens.
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Zhang J, Xu Q, Sun W, Zhou X, Fu D, Mao L. New Insights into the Role of NLRP3 Inflammasome in Pathogenesis and Treatment of Chronic Obstructive Pulmonary Disease. J Inflamm Res 2021; 14:4155-4168. [PMID: 34471373 PMCID: PMC8405160 DOI: 10.2147/jir.s324323] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 08/06/2021] [Indexed: 11/23/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is an inflammatory lung disease characterized by chronic airway obstruction and emphysema. Accumulating studies have shown that the onset and development of COPD are related to an aberrant immune response induced by the dysregulation of a number of genetic and environmental factors, while the exact pathogenesis of this disease is not well defined. Emerging studies based on tests on samples from COPD patients, animal models, pharmacological and genetic data suggest that the NLR family pyrin domain containing 3 (NLRP3) inflammasome activation is required in the lung inflammatory responses in the development of COPD. Although the available clinical studies targeting the inflammasome effector cytokine, IL-1β, or IL-1 signaling do not show positive outcomes for COPD treatment, many alternative strategies have been proposed by recent emerging studies. Here, we highlight the recent progress in our understanding of the role of the NLRP3 inflammasome in COPD and propose possible future studies that may further elucidate the roles of the inflammasome in the pathogenesis or the intervention of this inflammatory lung disease.
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Affiliation(s)
- Jie Zhang
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China.,Affiliated Hospital of Nantong University, Nantong, Jiangsu, 226019, People's Republic of China
| | - Qiuyun Xu
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China
| | - Weichen Sun
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China
| | - Xiaorong Zhou
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China
| | - Da Fu
- Central Laboratory for Medical Research, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, People's Republic of China
| | - Liming Mao
- Department of Immunology, School of Medicine, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China.,Basic Medical Research Center, School of Medicine, Nantong University, Nantong, Jiangsu, 226019, People's Republic of China
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Ahmad R, Akhter QS, Haque M. Occupational Cement Dust Exposure and Inflammatory Nemesis: Bangladesh Relevance. J Inflamm Res 2021; 14:2425-2444. [PMID: 34135615 PMCID: PMC8200167 DOI: 10.2147/jir.s312960] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 05/22/2021] [Indexed: 12/15/2022] Open
Abstract
Background Prolonged, repeated exposure to cement dust, depending on duration and sensitivity of cement dust-exposed workers, may cause deteriorating effects on the skin, eye, respiratory and hematological system. Toxic cement dust causes inflammatory damage to different body organs. White blood cells (WBCs) are considered cellular markers of ongoing tissue inflammation. Aim of the Study Determining the influence of occupational cement dust exposure on WBCs with its differentials (inflammatory markers) in workers from the cement manufacturing plant. Methodology Ninety-two seemingly healthy male subjects (46 workers of cement plant and 46 control subjects, who do not contact cement dust, residing in Dhaka) aged between 20 and 50 years participated in this cross-sectional study. This study took place in Dhaka Medical College, Bangladesh, between the years of 2017 and 2018. An automated hematoanalyser was used to assess both the total and differential count of WBC. Data were analyzed with multivariate regression analysis, independent samples t-test, and correlation test. Results The total WBC count, differential count of lymphocyte, and eosinophil were significantly (p< 0.05) higher in cement dust-exposed recruits than in the control group. Additionally, multivariate regression analysis revealed that duration of cement dust exposure showed a significant association with total WBC count [odds ratio (OR)=4.42,95%, confidence level (CI) 1.56,12.47, p 0.005]. Furthermore, univariate analysis revealed that the control group (not exposed to cement dust) was less likely to have the total WBC count alteration (OR = 0.122, 95% CI =0.047 to 0.311) than the cement dust-exposed group. The total WBC count showed a significant positive correlation with exposure duration to this toxic dust. Conclusion Cement dust exposure causes harmful inflammatory responses, as evidenced by increased total and differential WBC count. The period of contact with this toxic dust has an impact on WBC count.
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Affiliation(s)
- Rahnuma Ahmad
- Department of Physiology, Medical College for Women and Hospital, Dhaka, Bangladesh
| | | | - Mainul Haque
- The Unit of Pharmacology, Faculty of Medicine and Defence Health, Universiti Pertahanan Nasional Malaysia (National Defence University of Malaysia), Kem Perdana Sungai Besi, 57000, Kuala Lumpur, Malaysia
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Grytting VS, Refsnes M, Øvrevik J, Halle MS, Schönenberger J, van der Lelij R, Snilsberg B, Skuland T, Blom R, Låg M. Respirable stone particles differ in their ability to induce cytotoxicity and pro-inflammatory responses in cell models of the human airways. Part Fibre Toxicol 2021; 18:18. [PMID: 33957952 PMCID: PMC8101231 DOI: 10.1186/s12989-021-00409-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 04/08/2021] [Indexed: 11/30/2022] Open
Abstract
Background Respirable stone- and mineral particles may be a major constituent in occupational and ambient air pollution and represent a possible health hazard. However, with exception of quartz and asbestos, little is known about the toxic properties of mineral particles. In the present study, the pro-inflammatory and cytotoxic responses to six stone particle samples of different composition and with diameter below 10 μm were assessed in human bronchial epithelial cells (HBEC3-KT), THP-1 macrophages and a HBEC3-KT/THP-1 co-culture. Moreover, particle-induced lysis of human erythrocytes was assessed to determine the ability of the particles to lyse biological membranes. Finally, the role of the NLRP3 inflammasome was assessed using a NLRP3-specific inhibitor and detection of ASC oligomers and cleaved caspase-1 and IL-1β. A reference sample of pure α-quartz was included for comparison. Results Several stone particle samples induced a concentration-dependent increase in cytotoxicity and secretion of the pro-inflammatory cytokines CXCL8, IL-1α, IL-1β and TNFα. In HBEC3-KT, quartzite and anorthosite were the most cytotoxic stone particle samples and induced the highest levels of cytokines. Quartzite and anorthosite were also the most cytotoxic samples in THP-1 macrophages, while anorthosite and hornfels induced the highest cytokine responses. In comparison, few significant differences between particle samples were detected in the co-culture. Adjusting responses for differences in surface area concentrations did not fully account for the differences between particle samples. Moreover, the stone particles had low hemolytic potential, indicating that the effects were not driven by membrane lysis. Pre-incubation with a NLRP3-specific inhibitor reduced stone particle-induced cytokine responses in THP-1 macrophages, but not in HBEC3-KT cells, suggesting that the effects are mediated through different mechanisms in epithelial cells and macrophages. Particle exposure also induced an increase in ASC oligomers and cleaved caspase-1 and IL-1β in THP-1 macrophages, confirming the involvement of the NLRP3 inflammasome. Conclusions The present study indicates that stone particles induce cytotoxicity and pro-inflammatory responses in human bronchial epithelial cells and macrophages, acting through NLRP3-independent and -dependent mechanisms, respectively. Moreover, some particle samples induced cytotoxicity and cytokine release to a similar or greater extent than α-quartz. Thus, these minerals warrant further attention in future research. Supplementary Information The online version contains supplementary material available at 10.1186/s12989-021-00409-y.
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Affiliation(s)
- Vegard Sæter Grytting
- Section of Air Pollution and Noise, Department of Environmental Health, Domain of Infectious Disease Control and Environmental Health, Norwegian Institute of Public Health, PO Box 4404, Nydalen, N-0403, Oslo, Norway.
| | - Magne Refsnes
- Section of Air Pollution and Noise, Department of Environmental Health, Domain of Infectious Disease Control and Environmental Health, Norwegian Institute of Public Health, PO Box 4404, Nydalen, N-0403, Oslo, Norway
| | - Johan Øvrevik
- Section of Air Pollution and Noise, Department of Environmental Health, Domain of Infectious Disease Control and Environmental Health, Norwegian Institute of Public Health, PO Box 4404, Nydalen, N-0403, Oslo, Norway
| | | | | | | | | | - Tonje Skuland
- Section of Air Pollution and Noise, Department of Environmental Health, Domain of Infectious Disease Control and Environmental Health, Norwegian Institute of Public Health, PO Box 4404, Nydalen, N-0403, Oslo, Norway
| | | | - Marit Låg
- Section of Air Pollution and Noise, Department of Environmental Health, Domain of Infectious Disease Control and Environmental Health, Norwegian Institute of Public Health, PO Box 4404, Nydalen, N-0403, Oslo, Norway.
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Wei J, Wang X, Liu Q, Zhou N, Zhu S, Li Z, Li X, Yao J, Zhang L. The impact of polystyrene microplastics on cardiomyocytes pyroptosis through NLRP3/Caspase-1 signaling pathway and oxidative stress in Wistar rats. ENVIRONMENTAL TOXICOLOGY 2021; 36:935-944. [PMID: 33404188 DOI: 10.1002/tox.23095] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 12/27/2020] [Indexed: 05/23/2023]
Abstract
The extensive existing of microplastics (MPs) in the ecosystem have increased considerable attention concerning their potential adverse effects, the toxicities and the underlying mechanism of MPs are still scarce. To explore the effect of MPs on cardiac tissue in Wistar rats and unravel the mechanism of pyroptosis and oxidative stress in the process of cardiomyocytes injury, 32 male Wister rats were divided into control group and three model groups, which were exposed to 0.5 mm PS MPs at 0.5, 5 and 50 mg/L for 90 days. Results revealed that MPs could damage cardiac structure and function with impaired mitochondria integrity, as well as increased levels of creatine kinase-MB and cardiac troponinI (cTnI). Moreover, MPs administration triggered oxidative stress as indicated by increased levels of malondialdehyde and decreased activity of superoxide dismutase, glutathione peroxidase and catalase. Treatment with MPs resulted in apoptosis and pyroptosis as evidenced by increasing expressions of interleukin (IL)-1β, IL-18. Additionally, MPs were shown to induce the NOD-like receptor protein 3 inflammasomes activation in cardiac tissue, enabling activation of Caspase-1-dependent signaling pathway induced by inflammatory stimuli resulting from oxidative stress. In summary, these results illustrated that pyroptosis played a vital role in polystyrene MPs-induced cardiotoxicity, which might be helpful to understand the mechanism of cardiac dysfunction and induced by MPs.
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Affiliation(s)
- Jialiu Wei
- Key Laboratory of Cardiovascular Epidemiology & Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xifeng Wang
- Department of Critical Care Medicine, Yuhuangding Hospital, Qingdao University, Yantai, China
| | - Qian Liu
- College of Clinical Medicine, Binzhou Medical University, Yantai, China
| | - Na Zhou
- College of Clinical Medicine, Binzhou Medical University, Yantai, China
| | - Shuxiang Zhu
- College of Clinical Medicine, Binzhou Medical University, Yantai, China
| | - Zekang Li
- College of Clinical Medicine, Binzhou Medical University, Yantai, China
| | - Xiaoli Li
- Department of Critical Care Medicine, Yuhuangding Hospital, Qingdao University, Yantai, China
| | - Jinpeng Yao
- Department of Cardiology, Yantai Yeda Hospital, Yantai, China
| | - Lianshuang Zhang
- Department of Histology and Embryology, Binzhou Medical University, Yantai, China
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Adamcakova J, Mokra D. New Insights into Pathomechanisms and Treatment Possibilities for Lung Silicosis. Int J Mol Sci 2021; 22:ijms22084162. [PMID: 33920534 PMCID: PMC8072896 DOI: 10.3390/ijms22084162] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/14/2021] [Accepted: 04/14/2021] [Indexed: 02/06/2023] Open
Abstract
Inhalation of silica particles is an environmental and occupational cause of silicosis, a type of pneumoconiosis. Development of the lung silicosis is a unique process in which the vicious cycle of ingestion of inhaled silica particles by alveolar macrophages and their release triggers inflammation, generation of nodular lesions, and irreversible fibrosis. The pathophysiology of silicosis is complex, and interactions between the pathomechanisms have not been completely understood. However, elucidation of silica-induced inflammation cascades and inflammation-fibrosis relations has uncovered several novel possibilities of therapeutic targeting. This article reviews new information on the pathophysiology of silicosis and points out several promising treatment approaches targeting silicosis-related pathways.
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Zhao Q, Hao C, Wei J, Huang R, Li C, Yao W. Bone marrow-derived mesenchymal stem cells attenuate silica-induced pulmonary fibrosis by inhibiting apoptosis and pyroptosis but not autophagy in rats. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 216:112181. [PMID: 33848736 DOI: 10.1016/j.ecoenv.2021.112181] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 03/17/2021] [Accepted: 03/21/2021] [Indexed: 06/12/2023]
Abstract
This study aimed to investigate the effect of bone marrow-derived mesenchymal stem cells (BMSCs) on silica-induced lung fibrosis in a rat model. Thirty SD rats were randomly divided into three groups: control group, silica group, and BMSC group (n = 10 rats per group). BMSCs were injected successively into rats on the 14th, 28th, and 42nd days after silica exposure. All rats were sacrificed 56 days after silica exposure. We detected the pathological and fibrotic changes, apoptosis, autophagy, and pyroptosis in their lung tissue by histopathological examination, hydroxyproline content assays, real-time quantitative polymerase chain reactions, western blot assays, immunohistochemistry staining, immunofluorescence staining, and enzyme-linked immunosorbent assays. We found that BMSCs significantly relieved lung inflammatory infiltrates, collagen deposition, hydroxyproline content, and the mRNA and protein levels of collagen 1 and fibronectin. Compared to the silica group, in the BMSC group, apoptosis-associated proteins, including cleaved caspase 3 and Bax, were significantly downregulated, and Bcl-2/Bax was significantly upregulated; pyroptosis-related proteins, including Nlrp3, cleaved caspase 1, IL-1β, and IL-18, were significantly reduced. However, the BMSCs had no significant impact on autophagy-related proteins, including Beclin 1, P62, and LC3. In summary, BMSCs protected lung tissue against severe fibrosis by inhibiting apoptosis and pyroptosis but not autophagy.
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Affiliation(s)
- Qiuyan Zhao
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Changfu Hao
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Jingjing Wei
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Ruoxuan Huang
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Chao Li
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan, China
| | - Wu Yao
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, Henan, China.
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Tian ZK, Zhang YJ, Feng ZJ, Jiang H, Cheng C, Sun JM, Liu CM. Nephroprotective effect of gastrodin against lead-induced oxidative stress and inflammation in mice by the GSH, Trx, Nrf2 antioxidant system, and the HMGB1 pathway. Toxicol Res (Camb) 2021; 10:249-263. [PMID: 33884175 DOI: 10.1093/toxres/tfab003] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 01/02/2021] [Accepted: 01/11/2021] [Indexed: 01/07/2023] Open
Abstract
Gastrodin (GAS), the main phenolic glycoside derivative from Gastrodiaelata Blume, has several bio-activities. However, the molecular mechanisms of these protective actions currently remain unclear. This study aimed to investigate the mechanisms of GAS on lead (Pb)-induced oxidative stress and inflammation in the kidneys and primary kidney mesangial cells. Results indicated that GAS improved Pb-induced renal dysfunction and morphological changes in mice. GAS ameliorated Pb-induced inflammation in kidneys by reducing the TNF-α and IL-6 levels. GAS inhibited Pb-induced oxidative stress by regulating the glutathione, thioredoxin (Trx), and Nrf2 antioxidant systems. Furthermore, GAS supplementation increased the activation of SOD, GPx, HO-1, and NQO1 in the kidneys. GAS decreased the expression levels of HMGB1, TLR4, RAGE, MyD88, and NF-κB. These results were further confirmed in primary kidney mesangial cells. Collectively, this study demonstrated that GAS alleviated Pb-induced kidney oxidative stress and inflammation by regulating the antioxidant systems and the Nrf2 signaling pathway. Highlights Gastrodin ameliorated Pb-induced kidney injury in mice.Gastrodin inhibited oxidative stress and inflammation in kidneys.Gastrodin activated the GSH, Trx and Nrf2 antioxidant system in kidneys.Gastrodin inhibited the activities of HMGB1. RAGE, TLR4, and MyD88.
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Affiliation(s)
- Zhi-Kai Tian
- School of Life Science, Jiangsu Normal University, No. 101, Shanghai Road, Tongshan New Area, Xuzhou, Jiangsu 221116, P. R. China
| | - Yu-Jia Zhang
- School of Life Science, Jiangsu Normal University, No. 101, Shanghai Road, Tongshan New Area, Xuzhou, Jiangsu 221116, P. R. China
| | - Zhao-Jun Feng
- School of Life Science, Jiangsu Normal University, No. 101, Shanghai Road, Tongshan New Area, Xuzhou, Jiangsu 221116, P. R. China
| | - Hong Jiang
- School of Life Science, Jiangsu Normal University, No. 101, Shanghai Road, Tongshan New Area, Xuzhou, Jiangsu 221116, P. R. China
| | - Chao Cheng
- School of Life Science, Jiangsu Normal University, No. 101, Shanghai Road, Tongshan New Area, Xuzhou, Jiangsu 221116, P. R. China
| | - Jian-Mei Sun
- School of Life Science, Jiangsu Normal University, No. 101, Shanghai Road, Tongshan New Area, Xuzhou, Jiangsu 221116, P. R. China
| | - Chan-Min Liu
- School of Life Science, Jiangsu Normal University, No. 101, Shanghai Road, Tongshan New Area, Xuzhou, Jiangsu 221116, P. R. China
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Zhang ZQ, Tian HT, Liu H, Xie R. The role of macrophage-derived TGF-β1 on SiO 2-induced pulmonary fibrosis: A review. Toxicol Ind Health 2021; 37:240-250. [PMID: 33588701 DOI: 10.1177/0748233721989896] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Silicosis is an occupational fibrotic lung disease caused by inhaling large amounts of crystalline silica dust. Transforming growth factor-β1 (TGF-β1), which is secreted from macrophages, has an important role in the development of this disease. Macrophages can recognize and capture silicon dust, undergo M2 polarization, synthesize TGF-β1 precursors, and secrete them out of the cell where they are activated. Activated TGF-β1 induces cells from different sources, transforming them into myofibroblasts through autocrine and paracrine mechanisms, ultimately causing silicosis. These processes involve complex molecular events, which are not yet fully understood. This systematic summary may further elucidate the location and development of pulmonary fibrosis in the formation of silicosis. In this review, we discussed the proposed cellular and molecular mechanisms of production, secretion, activation of TGF-β1, as well as the mechanisms through which TGF-β1 induces cells from three different sources into myofibroblasts during the pathogenesis of silicosis. This study furthers the medical understanding of the pathogenesis and theoretical basis for diagnosing silicosis, thereby promoting silicosis prevention and treatment.
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Affiliation(s)
- Zhao-Qiang Zhang
- Department of Public Health, 74496Jining Medical University, Jining, China
| | - Hai-Tao Tian
- Department of Public Health, 74496Jining Medical University, Jining, China.,Jining No. 1 People's Hospital, Jining, China
| | - Hu Liu
- Department of Public Health, 74496Jining Medical University, Jining, China
| | - Ruining Xie
- Department of Public Health, 74496Jining Medical University, Jining, China
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Liu X, Lu B, Fu J, Zhu X, Song E, Song Y. Amorphous silica nanoparticles induce inflammation via activation of NLRP3 inflammasome and HMGB1/TLR4/MYD88/NF-kb signaling pathway in HUVEC cells. JOURNAL OF HAZARDOUS MATERIALS 2021; 404:124050. [PMID: 33053467 DOI: 10.1016/j.jhazmat.2020.124050] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/17/2020] [Accepted: 09/17/2020] [Indexed: 05/15/2023]
Abstract
Silica nanoparticles (SiO2 NPs) are extensively applied in various field, which increased their health risks to humans. SiO2 NPs were reported to enter into blood through inhalation and meanwhile, the potential use of SiO2 NPs as drug carriers in vivo allows them to present in blood circulation to induce inflammation of vascular endothelial cells which can be closely related with cardiovascular diseases, whilst the intrinsic mechanism has not been well understood. In this study, we found a regulation of signal axis induced by amorphous SiO2 NPs that triggers pro-inflammatory responses in human umbilical vein endothelial cells (HUVECs). HUVECs exposed with SiO2 NPs generate excess amount of reactive oxygen species (ROS) and lactate dehydrogenase (LDH), together with the up-regulation of cell inflammatory factors [interleukin-1 beta (IL-1β), interleukin-6 (IL-6), tumor necrotic factor-α (TNF-α)] and cell adhesion molecules [intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1)]. In addition, SiO2 NPs were found to promote the translocation and release of high-mobility group box 1 (HMGB1) from nucleus to cytoplasm, which was demonstrated to be regulated by ROS and NOD-like receptor pyrin domain containing 3 (NLRP3) inflammasome. Subsequently, toll-like receptor 4 (TLR4) could bind with HMGB1, up-regulate the expression of myeloid differentiation factor 88 (MyD88) and then activate nuclear factor kappa-B (NF-κB) signaling pathway, ultimately induced the inflammatory response of HUVECs. Overall, out results revealed the related signaling pathways of cell inflammation induced by amorphous SiO2 NPs, which provided new insights in understanding SiO2 NPs-induced cytotoxicity and offered safety guidance for further nanomaterial application.
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Affiliation(s)
- Xuting Liu
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China
| | - Bin Lu
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China
| | - Juanli Fu
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China
| | - Xiaokang Zhu
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China
| | - Erqun Song
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China
| | - Yang Song
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, People's Republic of China.
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Macrophage Autophagy and Silicosis: Current Perspective and Latest Insights. Int J Mol Sci 2021; 22:ijms22010453. [PMID: 33466366 PMCID: PMC7795780 DOI: 10.3390/ijms22010453] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 12/31/2020] [Accepted: 12/31/2020] [Indexed: 12/16/2022] Open
Abstract
Silicosis is an urgent public health problem in many countries. Alveolar macrophage (AM) plays an important role in silicosis progression. Autophagy is a balanced mechanism for regulating the cycle of synthesis and degradation of cellular components. Our previous study has shown that silica engulfment results in lysosomal rupture, which may lead to the accumulation of autophagosomes in AMs of human silicosis. The excessive accumulation of autophagosomes may lead to apoptosis in AMs. Herein, we addressed some assumptions concerning the complex function of autophagy-related proteins on the silicosis pathogenesis. We also recapped the molecular mechanism of several critical proteins targeting macrophage autophagy in the process of silicosis fibrosis. Furthermore, we summarized several exogenous chemicals that may cause an aggravation or alleviation for silica-induced pulmonary fibrosis by regulating AM autophagy. For example, lipopolysaccharides or nicotine may have a detrimental effect combined together with silica dust via exacerbating the blockade of AM autophagic degradation. Simultaneously, some natural product ingredients such as atractylenolide III, dioscin, or trehalose may be the potential AM autophagy regulators, protecting against silicosis fibrosis. In conclusion, the deeper molecular mechanism of these autophagy targets should be explored in order to provide feasible clues for silicosis therapy in the clinical setting.
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Haque M, Ahmed R, Akhter Q. Cement dust revelation and inflammatory response: Global health comportment with special consideration towards Bangladesh. ADVANCES IN HUMAN BIOLOGY 2021. [DOI: 10.4103/aihb.aihb_59_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Pang J, Qi X, Luo Y, Li X, Shu T, Li B, Song M, Liu Y, Wei D, Chen J, Wang J, Wang C. Multi-omics study of silicosis reveals the potential therapeutic targets PGD 2 and TXA 2. Am J Cancer Res 2021; 11:2381-2394. [PMID: 33500731 PMCID: PMC7797695 DOI: 10.7150/thno.47627] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 11/15/2020] [Indexed: 02/06/2023] Open
Abstract
Rationale: Silicosis is a severe occupational lung disease. Current treatments for silicosis have highly limited availability (i.e., lung transplantation) or, do not effectively prolong patient survival time (i.e., lung lavage). There is thus an urgent clinical need for effective drugs to retard the progression of silicosis. Methods: To systematically characterize the molecular changes associated with silicosis and to discover potential therapeutic targets, we conducted a transcriptomics analysis of human lung tissues acquired during transplantation, which was integrated with transcriptomics and metabolomics analyses of silicosis mouse lungs. The results from the multi-omics analyses were then verified by qPCR, western blot, and immunohistochemistry. The effect of Ramatroban on the progression of silicosis was evaluated in a silica-induced mouse model. Results: Wide metabolic alterations were found in lungs from both human patients and mice with silicosis. Targeted metabolite quantification and validation of expression of their synthases revealed that arachidonic acid (AA) pathway metabolites, prostaglandin D2 (PGD2) and thromboxane A2 (TXA2), were significantly up-regulated in silicosis lungs. We further examined the effect of Ramatroban, a clinical antagonist of both PGD2 and TXA2 receptors, on treating silicosis using a mouse model. The results showed that Ramatroban significantly alleviated silica-induced pulmonary inflammation, fibrosis, and cardiopulmonary dysfunction compared with the control group. Conclusion: Our results revealed the importance of AA metabolic reprogramming, especially PGD2 and TXA2 in the progression of silicosis. By blocking the receptors of these two prostanoids, Ramatroban may be a novel potential therapeutic drug to inhibit the progression of silicosis.
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Williams LJ, Tristram SG, Zosky GR. Iron Oxide Particles Alter Bacterial Uptake and the LPS-Induced Inflammatory Response in Macrophages. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 18:ijerph18010146. [PMID: 33379200 PMCID: PMC7794962 DOI: 10.3390/ijerph18010146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/17/2020] [Accepted: 12/24/2020] [Indexed: 12/13/2022]
Abstract
Exposure to geogenic (earth-derived) particulate matter (PM) is linked to severe bacterial infections in Australian Aboriginal communities. Experimental studies have shown that the concentration of iron in geogenic PM is associated with the magnitude of respiratory health effects, however, the mechanism is unclear. We investigated the effect of silica and iron oxide on the inflammatory response and bacterial phagocytosis in macrophages. THP-1 and peripheral blood mononuclear cell-derived macrophages were exposed to iron oxide (haematite or magnetite) or silica PM with or without exposure to lipopolysaccharide. Cytotoxicity and inflammation were assessed by LDH assay and ELISA respectively. The uptake of non-typeable Haemophilus influenzae by macrophages was quantified by flow cytometry. Iron oxide increased IL-8 production while silica also induced significant production of IL-1β. Both iron oxide and silica enhanced LPS-induced production of TNF-α, IL-1β, IL-6 and IL-8 in THP-1 cells with most of these responses replicated in PBMCs. While silica had no effect on NTHi phagocytosis, iron oxide significantly impaired this response. These data suggest that geogenic particles, particularly iron oxide PM, cause inflammatory cytokine production in macrophages and impair bacterial phagocytosis. These responses do not appear to be linked. This provides a possible mechanism for the link between exposure to these particles and severe bacterial infection.
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Affiliation(s)
- Lewis J. Williams
- Tasmanian School of Medicine, University of Tasmania, 7000 Hobart, Australia;
| | - Stephen G. Tristram
- School of Health Sciences, University of Tasmania, 7250 Launceston, Australia;
| | - Graeme R. Zosky
- Tasmanian School of Medicine, University of Tasmania, 7000 Hobart, Australia;
- Menzies Institute for Medical Research, University of Tasmania, 7000 Hobart, Australia
- Correspondence: ; Tel.: +61-3-6226-6921
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Skočaj M, Bizjak M, Strojan K, Lojk J, Erdani Kreft M, Miš K, Pirkmajer S, Bregar VB, Veranič P, Pavlin M. Proposing Urothelial and Muscle In Vitro Cell Models as a Novel Approach for Assessment of Long-Term Toxicity of Nanoparticles. Int J Mol Sci 2020; 21:ijms21207545. [PMID: 33066271 PMCID: PMC7589566 DOI: 10.3390/ijms21207545] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/07/2020] [Accepted: 10/09/2020] [Indexed: 12/11/2022] Open
Abstract
Many studies evaluated the short-term in vitro toxicity of nanoparticles (NPs); however, long-term effects are still not adequately understood. Here, we investigated the potential toxic effects of biomedical (polyacrylic acid and polyethylenimine coated magnetic NPs) and two industrial (SiO2 and TiO2) NPs following different short-term and long-term exposure protocols on two physiologically different in vitro models that are able to differentiate: L6 rat skeletal muscle cell line and biomimetic normal porcine urothelial (NPU) cells. We show that L6 cells are more sensitive to NP exposure then NPU cells. Transmission electron microscopy revealed an uptake of NPs into L6 cells but not NPU cells. In L6 cells, we obtained a dose-dependent reduction in cell viability and increased reactive oxygen species (ROS) formation after 24 h. Following continuous exposure, more stable TiO2 and polyacrylic acid (PAA) NPs increased levels of nuclear factor Nrf2 mRNA, suggesting an oxidative damage-associated response. Furthermore, internalized magnetic PAA and TiO2 NPs hindered the differentiation of L6 cells. We propose the use of L6 skeletal muscle cells and NPU cells as a novel approach for assessment of the potential long-term toxicity of relevant NPs that are found in the blood and/or can be secreted into the urine.
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Affiliation(s)
- Matej Skočaj
- Group for nano and biotechnological applications, Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (M.S.); (M.B.); (K.S.); (J.L.); (V.B.B.)
- Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (K.M.); (S.P.)
- Institute of Cell Biology, Faculty of Medicine, University of Ljubljana, SI-1000 Ljubljana, Slovenia;
| | - Maruša Bizjak
- Group for nano and biotechnological applications, Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (M.S.); (M.B.); (K.S.); (J.L.); (V.B.B.)
- Institute of Biophysics, Faculty of Medicine, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - Klemen Strojan
- Group for nano and biotechnological applications, Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (M.S.); (M.B.); (K.S.); (J.L.); (V.B.B.)
| | - Jasna Lojk
- Group for nano and biotechnological applications, Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (M.S.); (M.B.); (K.S.); (J.L.); (V.B.B.)
- Institute of Biophysics, Faculty of Medicine, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - Mateja Erdani Kreft
- Institute of Cell Biology, Faculty of Medicine, University of Ljubljana, SI-1000 Ljubljana, Slovenia;
| | - Katarina Miš
- Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (K.M.); (S.P.)
| | - Sergej Pirkmajer
- Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (K.M.); (S.P.)
| | - Vladimir Boštjan Bregar
- Group for nano and biotechnological applications, Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (M.S.); (M.B.); (K.S.); (J.L.); (V.B.B.)
| | - Peter Veranič
- Institute of Cell Biology, Faculty of Medicine, University of Ljubljana, SI-1000 Ljubljana, Slovenia;
- Correspondence: (P.V.); (M.P.)
| | - Mojca Pavlin
- Group for nano and biotechnological applications, Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia; (M.S.); (M.B.); (K.S.); (J.L.); (V.B.B.)
- Institute of Biophysics, Faculty of Medicine, University of Ljubljana, SI-1000 Ljubljana, Slovenia
- Correspondence: (P.V.); (M.P.)
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Evaluation of the NLRP3 Inflammasome Activating Effects of a Large Panel of TiO 2 Nanomaterials in Macrophages. NANOMATERIALS 2020; 10:nano10091876. [PMID: 32961672 PMCID: PMC7558067 DOI: 10.3390/nano10091876] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/10/2020] [Accepted: 09/15/2020] [Indexed: 12/12/2022]
Abstract
TiO2 nanomaterials are among the most commonly produced and used engineered nanomaterials (NMs) in the world. There is controversy regarding their ability to induce inflammation-mediated lung injuries following inhalation exposure. Activation of the NACHT, LRR and PYD domains-containing protein 3 (NALP3) inflammasome and subsequent release of the cytokine interleukin (IL)-1β in pulmonary macrophages has been postulated as an essential pathway for the inflammatory and associated tissue-remodeling effects of toxic particles. Our study aim was to determine and rank the IL-1β activating properties of TiO2 NMs by comparing a large panel of different samples against each other as well as against fine TiO2, synthetic amorphous silica and crystalline silica (DQ12 quartz). Effects were evaluated in primary bone marrow derived macrophages (BMDMs) from NALP3-deficient and proficient mice as well as in the rat alveolar macrophage cell line NR8383. Our results show that specific TiO2 NMs can activate the inflammasome in macrophages albeit with a markedly lower potency than amorphous SiO2 and quartz. The heterogeneity in IL-1β release observed in our study among 19 different TiO2 NMs underscores the relevance of case-by-case evaluation of nanomaterials of similar chemical composition. Our findings also further promote the NR8383 cell line as a promising in vitro tool for the assessment of the inflammatory and inflammasome activating properties of NMs.
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Leinardi R, Pavan C, Yedavally H, Tomatis M, Salvati A, Turci F. Cytotoxicity of fractured quartz on THP-1 human macrophages: role of the membranolytic activity of quartz and phagolysosome destabilization. Arch Toxicol 2020; 94:2981-2995. [PMID: 32592078 PMCID: PMC7415752 DOI: 10.1007/s00204-020-02819-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 06/18/2020] [Indexed: 12/13/2022]
Abstract
The pathogenicity of quartz involves lysosomal alteration in alveolar macrophages. This event triggers the inflammatory cascade that may lead to quartz-induced silicosis and eventually lung cancer. Experiments with synthetic quartz crystals recently showed that quartz dust is cytotoxic only when the atomic order of the crystal surfaces is upset by fracturing. Cytotoxicity was not observed when quartz had as-grown, unfractured surfaces. These findings raised questions on the potential impact of quartz surfaces on the phagolysosomal membrane upon internalization of the particles by macrophages. To gain insights on the surface-induced cytotoxicity of quartz, as-grown and fractured quartz particles in respirable size differing only in surface properties related to fracturing were prepared and physico-chemically characterized. Synthetic quartz particles were compared to a well-known toxic commercial quartz dust. Membranolysis was assessed on red blood cells, and quartz uptake, cell viability and effects on lysosomes were assessed on human PMA-differentiated THP-1 macrophages, upon exposing cells to increasing concentrations of quartz particles (10–250 µg/ml). All quartz samples were internalized, but only fractured quartz elicited cytotoxicity and phagolysosomal alterations. These effects were blunted when uptake was suppressed by incubating macrophages with particles at 4 °C. Membranolysis, but not cytotoxicity, was quenched when fractured quartz was incubated with cells in protein-supplemented medium. We propose that, upon internalization, the phagolysosome environment rapidly removes serum proteins from the quartz surface, restoring quartz membranolytic activity in the phagolysosomes. Our findings indicate that the cytotoxic activity of fractured quartz is elicited by promoting phagolysosomal membrane alteration.
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Affiliation(s)
- Riccardo Leinardi
- "G. Scansetti" Interdepartmental Center for Studies On Asbestos and Other Toxic Particulates, Department of Chemistry, University of Torino, Via P. Giuria 7, 10125, Turin, Italy
| | - Cristina Pavan
- Louvain Centre for Toxicology and Applied Pharmacology (LTAP), Université Catholique de Louvain, Avenue Hippocrate 57, 1200, Brussels, Belgium
| | - Harita Yedavally
- Department of Nanomedicine & Drug Targeting, Groningen Research Institute of Pharmacy (GRIP), University of Groningen, Antonius Deusinglaan 1, Groningen, 9713 AV, The Netherlands
| | - Maura Tomatis
- "G. Scansetti" Interdepartmental Center for Studies On Asbestos and Other Toxic Particulates, Department of Chemistry, University of Torino, Via P. Giuria 7, 10125, Turin, Italy
| | - Anna Salvati
- Department of Nanomedicine & Drug Targeting, Groningen Research Institute of Pharmacy (GRIP), University of Groningen, Antonius Deusinglaan 1, Groningen, 9713 AV, The Netherlands.
| | - Francesco Turci
- "G. Scansetti" Interdepartmental Center for Studies On Asbestos and Other Toxic Particulates, Department of Chemistry, University of Torino, Via P. Giuria 7, 10125, Turin, Italy.
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50
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Skuland T, Låg M, Gutleb AC, Brinchmann BC, Serchi T, Øvrevik J, Holme JA, Refsnes M. Pro-inflammatory effects of crystalline- and nano-sized non-crystalline silica particles in a 3D alveolar model. Part Fibre Toxicol 2020; 17:13. [PMID: 32316988 PMCID: PMC7175518 DOI: 10.1186/s12989-020-00345-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 04/07/2020] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Silica nanoparticles (SiNPs) are among the most widely manufactured and used nanoparticles. Concerns about potential health effects of SiNPs have therefore risen. Using a 3D tri-culture model of the alveolar lung barrier we examined effects of exposure to SiNPs (Si10) and crystalline silica (quartz; Min-U-Sil) in the apical compartment consisting of human alveolar epithelial A549 cells and THP-1-derived macrophages, as well as in the basolateral compartment with Ea.hy926 endothelial cells. Inflammation-related responses were measured by ELISA and gene expression. RESULTS Exposure to both Si10 and Min-U-Sil induced gene expression and release of CXCL8, interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), interleukin-1α (IL-1α) and interleukin-1β (IL-1β) in a concentration-dependent manner. Cytokine/chemokine expression and protein levels were highest in the apical compartment. Si10 and Min-U-Sil also induced expression of adhesion molecules ICAM-1 and E-selectin in the apical compartment. In the basolateral endothelial compartment we observed marked, but postponed effects on expression of all these genes, but only at the highest particle concentrations. Geneexpressions of heme oxygenase-1 (HO-1) and the metalloproteases (MMP-1 and MMP-9) were less affected. The IL-1 receptor antagonist (IL-1RA), markedly reduced effects of Si10 and Min-U-Sil exposures on gene expression of cytokines and adhesion molecules, as well as cytokine-release in both compartments. CONCLUSIONS Si10 and Min-U-Sil induced gene expression and release of pro-inflammatory cytokines/adhesion molecules at both the epithelial/macrophage and endothelial side of a 3D tri-culture. Responses in the basolateral endothelial cells were only induced at high concentrations, and seemed to be mediated by IL-1α/β released from the apical epithelial cells and macrophages.
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Affiliation(s)
- Tonje Skuland
- Section of Air Pollution and Noise, Department of Environment and Health, Norwegian Institute of Public Health, PO Box 4404 Nydalen, N-0403, Oslo, Norway.
| | - Marit Låg
- Section of Air Pollution and Noise, Department of Environment and Health, Norwegian Institute of Public Health, PO Box 4404 Nydalen, N-0403, Oslo, Norway
| | - Arno C Gutleb
- Environmental Research and Innovation (ERIN), Luxembourg Institute of Science and Technology (LIST), Belvaux, Grand Duchy of Luxembourg, Luxembourg
| | - Bendik C Brinchmann
- Section of Air Pollution and Noise, Department of Environment and Health, Norwegian Institute of Public Health, PO Box 4404 Nydalen, N-0403, Oslo, Norway
- Department of Occupational Medicine and Epidemiology, National Institute of Occupational Health, Oslo, Norway
| | - Tommaso Serchi
- Environmental Research and Innovation (ERIN), Luxembourg Institute of Science and Technology (LIST), Belvaux, Grand Duchy of Luxembourg, Luxembourg
| | - Johan Øvrevik
- Section of Air Pollution and Noise, Department of Environment and Health, Norwegian Institute of Public Health, PO Box 4404 Nydalen, N-0403, Oslo, Norway
- Department of Biosciences, Faculty of Mathematics and Natural Sciences, University of Oslo, Oslo, Norway
| | - Jørn A Holme
- Section of Air Pollution and Noise, Department of Environment and Health, Norwegian Institute of Public Health, PO Box 4404 Nydalen, N-0403, Oslo, Norway
| | - Magne Refsnes
- Section of Air Pollution and Noise, Department of Environment and Health, Norwegian Institute of Public Health, PO Box 4404 Nydalen, N-0403, Oslo, Norway
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