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      Coal dust nanoparticles induced pulmonary fibrosis by promoting inflammation and epithelial-mesenchymal transition via the NF-κB/NLRP3 pathway driven by IGF1/ROS-mediated AKT/GSK3β signals

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          Abstract

          Pneumoconiosis is the most common and serious disease among coal miners. In earlier work on this subject, we documented that coal dust (CD) nanoparticles (CD-NPs) induced pulmonary fibrosis (PF) more profoundly than did CD micron particles (CD-MPs), but the mechanism has not been thoroughly studied. Based on the GEO database, jveen, STRING, and Cytoscape tools were used to screen hub genes regulating PF. Particle size distribution of CD were analyzed with Malvern nanoparticle size potentiometer. Combining 8 computational methods, we found that IGF1, POSTN, MMP7, ASPN, and CXCL14 may act as hub genes regulating PF. Based on the high score of IGF1 and its important regulatory role in various tissue fibrosis, we selected it as the target gene in this study. Activation of the IGF1/IGF1R axis promoted CD-NPs-induced PF, and inhibition of the axis activation had the opposite effect in vitro and in vivo. Furthermore, activation of the IGF1/IGF1R axis induced generation of reactive oxygen species (ROS) to promote epithelial-mesenchymal transition (EMT) in alveolar epithelial cells (AECs) to accelerate PF. High-throughput gene sequencing based on lung tissue suggested that cytokine-cytokine receptor interaction and the NF-kB signaling pathway play a key role in PF. Also, ROS induced inflammation and EMT by the activation of the NF-kB/NLRP3 axis to accelerate PF. ROS can induce the activation of AKT/GSK3β signaling, and inhibition of it can inhibit ROS-induced inflammation and EMT by the NF-kB/NLRP3 axis, thereby inhibiting PF. CD-NPs induced PF by promoting inflammation and EMT via the NF-κB/NLRP3 pathway driven by IGF1/ROS-mediated AKT/GSK3β signals. This study provides a valuable experimental basis for the prevention and treatment of coal workers’ pneumoconiosis.

          Illustration of the overall research idea of this study: IGF1 stimulates coal dust nanoparticles induced pulmonary fibrosis by promoting inflammation and EMT via the NF-κB/NLRP3 pathway driven by ROS-mediated AKT/GSK3β signals.

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          The NLRP3 Inflammasome: An Overview of Mechanisms of Activation and Regulation

          Nathan Kelley, Devon Jeltema, Yanhui Duan … (2019)
          The NLRP3 inflammasome is a critical component of the innate immune system that mediates caspase-1 activation and the secretion of proinflammatory cytokines IL-1β/IL-18 in response to microbial infection and cellular damage. However, the aberrant activation of the NLRP3 inflammasome has been linked with several inflammatory disorders, which include cryopyrin-associated periodic syndromes, Alzheimer’s disease, diabetes, and atherosclerosis. The NLRP3 inflammasome is activated by diverse stimuli, and multiple molecular and cellular events, including ionic flux, mitochondrial dysfunction, and the production of reactive oxygen species, and lysosomal damage have been shown to trigger its activation. How NLRP3 responds to those signaling events and initiates the assembly of the NLRP3 inflammasome is not fully understood. In this review, we summarize our current understanding of the mechanisms of NLRP3 inflammasome activation by multiple signaling events, and its regulation by post-translational modifications and interacting partners of NLRP3.
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            Nanotoxicology: An Emerging Discipline Evolving from Studies of Ultrafine Particles

            Günter Oberdörster, Eva Oberdörster, Jan Oberdörster (2005)
            Although humans have been exposed to airborne nanosized particles (NSPs; < 100 nm) throughout their evolutionary stages, such exposure has increased dramatically over the last century due to anthropogenic sources. The rapidly developing field of nanotechnology is likely to become yet another source through inhalation, ingestion, skin uptake, and injection of engineered nanomaterials. Information about safety and potential hazards is urgently needed. Results of older bio-kinetic studies with NSPs and newer epidemiologic and toxicologic studies with airborne ultrafine particles can be viewed as the basis for the expanding field of nanotoxicology, which can be defined as safety evaluation of engineered nanostructures and nanodevices. Collectively, some emerging concepts of nanotoxicology can be identified from the results of these studies. When inhaled, specific sizes of NSPs are efficiently deposited by diffusional mechanisms in all regions of the respiratory tract. The small size facilitates uptake into cells and transcytosis across epithelial and endothelial cells into the blood and lymph circulation to reach potentially sensitive target sites such as bone marrow, lymph nodes, spleen, and heart. Access to the central nervous system and ganglia via translocation along axons and dendrites of neurons has also been observed. NSPs penetrating the skin distribute via uptake into lymphatic channels. Endocytosis and biokinetics are largely dependent on NSP surface chemistry (coating) and in vivo surface modifications. The greater surface area per mass compared with larger-sized particles of the same chemistry renders NSPs more active biologically. This activity includes a potential for inflammatory and pro-oxidant, but also antioxidant, activity, which can explain early findings showing mixed results in terms of toxicity of NSPs to environmentally relevant species. Evidence of mitochondrial distribution and oxidative stress response after NSP endocytosis points to a need for basic research on their interactions with subcellular structures. Additional considerations for assessing safety of engineered NSPs include careful selections of appropriate and relevant doses/concentrations, the likelihood of increased effects in a compromised organism, and also the benefits of possible desirable effects. An interdisciplinary team approach (e.g., toxicology, materials science, medicine, molecular biology, and bioinformatics, to name a few) is mandatory for nanotoxicology research to arrive at an appropriate risk assessment.
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              Pharmacological Inhibitors of the NLRP3 Inflammasome

              Ayesha Zahid, Bofeng Li, Arnaud John Kombe Kombe … (2019)
              Inflammasomes play a crucial role in innate immunity by serving as signaling platforms which deal with a plethora of pathogenic products and cellular products associated with stress and damage. By far, the best studied and most characterized inflammasome is NLRP3 inflammasome, which consists of NLRP3 (nucleotide-binding domain leucine-rich repeat (NLR) and pyrin domain containing receptor 3), ASC (apoptosis-associated speck-like protein containing a caspase recruitment domain), and procaspase-1. Activation of NLRP3 inflammasome is mediated by highly diverse stimuli. Upon activation, NLRP3 protein recruits the adapter ASC protein, which recruits the procaspase-1 resulting in its cleavage and activation, inducing the maturation, and secretion of inflammatory cytokines and pyroptosis. However, aberrant activation of the NLRP3 inflammasome is implicated in various diseases including diabetes, atherosclerosis, metabolic syndrome, cardiovascular, and neurodegenerative diseases; raising a tremendous clinical interest in exploring the potential inhibitors of NLRP3 inflammasome. Recent investigations have disclosed various inhibitors of the NLRP3 inflammasome pathway which were validated through in vitro studies and in vivo experiments in animal models of NLRP3-associated disorders. Some of these inhibitors directly target the NLRP3 protein whereas some are aimed at other components and products of the inflammasome. Direct targeting of NLRP3 protein can be a better choice because it can prevent off target immunosuppressive effects, thus restrain tissue destruction. This paper will review the various pharmacological inhibitors of the NLRP3 inflammasome and will also discuss their mechanism of action.
              Article 0 comments Cited 253 times – based on 0 reviews     Review now
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                Author and article information

                Contributors
                Xiaolong Tang:
                ORCID: http://orcid.org/0000-0001-9421-9430
                xltang2006@aust.edu.cn
                Journal
                Journal ID (nlm-ta): Cell Death Discov
                Journal ID (iso-abbrev): Cell Death Discov
                Title: Cell Death Discovery
                Publisher: Nature Publishing Group UK (London )
                ISSN (Electronic): 2058-7716
                Publication date (Electronic): 29 December 2022
                Publication date PMC-release: 29 December 2022
                Publication date Collection: 2022
                Volume: 8
                Electronic Location Identifier: 500
                Affiliations
                [1 ]GRID grid.440648.a, ISNI 0000 0001 0477 188X, Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining (Anhui University of Science and Technology), ; Huainan, 232001 China
                [2 ]Institute of Environment-friendly Materials and Occupational Health of Anhui University of Science and Technology, Wuhu, 241003 China
                [3 ]GRID grid.440648.a, ISNI 0000 0001 0477 188X, Medcial School, , Anhui University of Science & Technology, ; Huainan, 232001 China
                Author information
                http://orcid.org/0000-0003-1925-8557
                http://orcid.org/0000-0001-9421-9430
                Article
                Publisher ID: 1291
                DOI: 10.1038/s41420-022-01291-z
                PMC ID: 9800584
                PubMed ID: 36581638
                SO-VID: cd14fdb5-dc01-433c-93d9-acc5a7a5d5eb
                Copyright © © The Author(s) 2022
                License:

                Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

                History
                Date received : 11 July 2022
                Date revision received : 20 December 2022
                Date accepted : 21 December 2022
                Funding
                Funded by: The University Natural Science Research Project of Anhui Province (NO. YJS20210374, YJS20210407, 2021sx032, 2021xjjy59), National Natural Science Foundation of China (NO. 82071862, 81872017), Research Foundation of the Institute of Environment-friendly Materials and Occupational Health (Wuhu), Anhui University of Science and Technology (ALW2020YF11) and Graduate Innovation Fund Project of Anhui University of Science and Technology (NO. 2021CX1012) funded this research.
                Categories
                Subject: Article
                Custom metadata
                issue-copyright-statement © The Author(s) 2022

                Keywords: cell signalling,predictive markers
                Data availability:
                Keywords: cell signalling, predictive markers

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