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Almeida-da-Silva CLC, Moreira-Souza ACDA, Ojcius DM. Traditional approaches and recent tools for studying inflammasome activity. J Immunol Methods 2024; 533:113744. [PMID: 39147232 DOI: 10.1016/j.jim.2024.113744] [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: 02/28/2024] [Revised: 08/12/2024] [Accepted: 08/12/2024] [Indexed: 08/17/2024]
Abstract
Inflammasomes play a major role in the immune response to infection, development of autoimmune disease, and control of cancer. Western blots were originally used in the early 2000s to characterize inflammasome activation. Since then, a panoply of techniques has been developed to characterize and visualize inflammasome activation in cells, tissues, and animals. This review article describes the most common techniques used by researchers in the inflammasome field and proposes that cell-specific characterization of inflammasome activation in tissues or animals may soon be commonly reported.
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Affiliation(s)
| | | | - David M Ojcius
- Department of Biomedical Sciences, University of the Pacific, Arthur A. Dugoni, School of Dentistry, San Francisco, CA 94103, USA.
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2
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Țicolea M, Pop RM, Pârvu M, Usatiuc LO, Uifălean A, Ranga F, Pârvu AE. Phytochemical Composition Antioxidant and Anti-Inflammatory Activity of Artemisia dracunculus and Artemisia abrotanum. Antioxidants (Basel) 2024; 13:1016. [PMID: 39199260 PMCID: PMC11352149 DOI: 10.3390/antiox13081016] [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: 07/22/2024] [Revised: 08/10/2024] [Accepted: 08/17/2024] [Indexed: 09/01/2024] Open
Abstract
This study aimed to investigate the antioxidant and anti-inflammatory activities mechanism of Artemisia dracunculus (A. dracunculus) and Artemisia abrotanum (A. abrotanum) ethanol extracts in acute rat inflammation induced in Wistar male rats with turpentine oil. The characterization of the polyphenolic compounds in the extracts was conducted using UV-Vis and Fourier-transform infrared spectroscopy and high-performance liquid chromatography coupled with mass spectrometry techniques. The antioxidant activity of the extracts was evaluated in vitro by DPPH, FRAP, H2O2, and NO scavenging tests and in vivo by measuring the total oxidative status (TOS), total antioxidant capacity (TAC), oxidative stress index (OSI), 8-hydroxy-deoxyguanosine (8-Oxo-dG), advanced oxidation protein products (AOPP), malondialdehyde (MDA), nitric oxide (NO), 3-nitrotyrosine (3NT), and total thiols (SH). Inflammation was evaluated by measuring nuclear factor-kB-p65 (NfkB-p65) and NLRP3 inflammasome activation with IL-1β, IL-18, and gasdermin D. Liver and renal toxicity was determined following transaminases (ALT and AST), creatinine, and urea. The experimental results indicated that A. dracunculus and A. abrotanum ethanol extracts have moderate in vitro antioxidant activity and had in vivo antioxidant activity and an anti-inflammatory effect by NfkB-p65, IL-1b, IL-18, and gasdermin D serum level reduction. The antioxidant activity correlated with the chemical composition of the extracts. These results bring evidence-based use of A. dracunculus and A. abrotanum's in traditional and contemporary medicine.
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Affiliation(s)
- Mădălina Țicolea
- Department of Morpho-Functional Sciences, Discipline of Pathophysiology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (M.Ț.); (L.-O.U.); (A.U.); (A.E.P.)
| | - Raluca Maria Pop
- Department of Morpho-Functional Sciences, Discipline of Pharmacology, Toxicology and Clinical Pharmacology, Iuliu Haţieganu University of Medicine and Pharmacy, 400337 Cluj-Napoca, Romania
| | - Marcel Pârvu
- Department of Biology, Babes-Bolyai University, 400015 Cluj-Napoca, Romania
| | - Lia-Oxana Usatiuc
- Department of Morpho-Functional Sciences, Discipline of Pathophysiology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (M.Ț.); (L.-O.U.); (A.U.); (A.E.P.)
| | - Ana Uifălean
- Department of Morpho-Functional Sciences, Discipline of Pathophysiology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (M.Ț.); (L.-O.U.); (A.U.); (A.E.P.)
| | - Floricuța Ranga
- Food Science and Technology, Department of Food Science, University of Agricultural Science and Veterinary Medicine Cluj-Napoca, Calea Mănăștur, No 3-5, 400372 Cluj-Napoca, Romania;
| | - Alina Elena Pârvu
- Department of Morpho-Functional Sciences, Discipline of Pathophysiology, Iuliu Haţieganu University of Medicine and Pharmacy, 400012 Cluj-Napoca, Romania; (M.Ț.); (L.-O.U.); (A.U.); (A.E.P.)
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Cyr B, Curiel Cid R, Loewenstein D, Vontell RT, Dietrich WD, Keane RW, de Rivero Vaccari JP. The Inflammasome Adaptor Protein ASC in Plasma as a Biomarker of Early Cognitive Changes. Int J Mol Sci 2024; 25:7758. [PMID: 39063000 PMCID: PMC11276719 DOI: 10.3390/ijms25147758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 07/13/2024] [Accepted: 07/14/2024] [Indexed: 07/28/2024] Open
Abstract
Dementia is a group of symptoms including memory loss, language difficulties, and other types of cognitive and functional impairments that affects 57 million people worldwide, with the incidence expected to double by 2040. Therefore, there is an unmet need to develop reliable biomarkers to diagnose early brain impairments so that emerging interventions can be applied before brain degeneration. Here, we performed biomarker analyses for apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC), neurofilament light chain (NfL), glial fibrillary acidic protein (GFAP), and amyloid-β 42/40 (Aβ42/40) ratio in the plasma of older adults. Participants had blood drawn at baseline and underwent two annual clinical and cognitive evaluations. The groups tested either cognitively normal on both evaluations (NN), cognitively normal year 1 but cognitively impaired year 2 (NI), or cognitively impaired on both evaluations (II). ASC was elevated in the plasma of the NI group compared to the NN and II groups. Additionally, Aβ42 was increased in the plasma in the NI and II groups compared to the NN group. Importantly, the area under the curve (AUC) for ASC in participants older than 70 years old in NN vs. NI groups was 0.81, indicating that ASC is a promising plasma biomarker for early detection of cognitive decline.
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Affiliation(s)
- Brianna Cyr
- The Miami Project to Cure Paralysis, Department of Neurological Surgery, University of Miami, Miami, FL 33136, USA; (B.C.); (W.D.D.); (R.W.K.)
| | - Rosie Curiel Cid
- Center for Cognitive Neuroscience and Aging, University of Miami, Miami, FL 33136, USA; (R.C.C.); (D.L.)
| | - David Loewenstein
- Center for Cognitive Neuroscience and Aging, University of Miami, Miami, FL 33136, USA; (R.C.C.); (D.L.)
| | | | - W. Dalton Dietrich
- The Miami Project to Cure Paralysis, Department of Neurological Surgery, University of Miami, Miami, FL 33136, USA; (B.C.); (W.D.D.); (R.W.K.)
| | - Robert W. Keane
- The Miami Project to Cure Paralysis, Department of Neurological Surgery, University of Miami, Miami, FL 33136, USA; (B.C.); (W.D.D.); (R.W.K.)
- Department of Physiology and Biophysics, University of Miami, Miami, FL 33136, USA
| | - Juan Pablo de Rivero Vaccari
- The Miami Project to Cure Paralysis, Department of Neurological Surgery, University of Miami, Miami, FL 33136, USA; (B.C.); (W.D.D.); (R.W.K.)
- Center for Cognitive Neuroscience and Aging, University of Miami, Miami, FL 33136, USA; (R.C.C.); (D.L.)
- Department of Physiology and Biophysics, University of Miami, Miami, FL 33136, USA
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Kukulage DSK, Matarage Don NNJ, Ahn YH. Emerging chemistry and biology in protein glutathionylation. Curr Opin Chem Biol 2022; 71:102221. [PMID: 36223700 PMCID: PMC9844265 DOI: 10.1016/j.cbpa.2022.102221] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 01/27/2023]
Abstract
Protein S-glutathionylation serves a regulatory role in proteins and modulates distinct biological processes implicated in health and diseases. Despite challenges in analyzing the dynamic and reversible nature of S-glutathionylation, recent chemical and biological methods have significantly advanced the field of S-glutathionylation, culminating in selective identification and detection, structural motif analysis, and functional studies of S-glutathionylation. This review will highlight emerging studies of protein glutathionylation, beginning by introducing biochemical tools that enable mass spectrometric identification and live-cell imaging of S-glutathionylation. Next, it will spotlight recent examples of S-glutathionylation regulating physiology and inflammation. Lastly, we will feature two emerging lines of glutathionylation research in cryptic cysteine glutathionylation and protein C-glutathionylation.
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Affiliation(s)
| | | | - Young-Hoon Ahn
- Department of Chemistry, Drexel University, Philadelphia, PA 19104, USA.
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Niu Y, Yang S, Hu X. Silica exposure activates non-canonical inflammasome complex in intratracheal instilled rat model. Toxicol Res (Camb) 2022; 11:784-790. [PMID: 36337236 PMCID: PMC9618110 DOI: 10.1093/toxres/tfac061] [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: 03/27/2022] [Revised: 08/01/2022] [Accepted: 08/09/2022] [Indexed: 11/13/2022] Open
Abstract
Background Inhalation of silica crystals in occupational settings is a main cause of silicosis, a chronic irreversible pulmonary disorder. Our prior studies demonstrated the activation of inflammasome sensors AIM2 and NLRP3, effector protein caspase-1, and significant increase in IL-1β in silica exposed rats, suggesting that the canonical inflammasome activation may be associated with silica-induced tissue damage and inflammation. Aims and Methods In our current study using the same animal model system, we further evaluated the components of non-canonical inflammasome, including NEK7, caspase-11, and GSDMD following silica exposure. Results We demonstrated sustained NEK7 elevation in the rat lung epithelial cells and macrophages following 1- and 3-day exposure. Enhanced NEK7 expression was also detected in lung homogenate by western blot. Similarly, caspase-11 expression was induced by silica exposure in lung sections and homogenate. Elevated GSDMD was observed both in lung sections by immunohistochemical staining and in lung tissue homogenate by western blot. Conclusion In summary, our current study demonstrated increase in NEK7, caspase-11, and GSDMD in silica exposed rats, indicating activation of non-canonical inflammasome complex, thereby providing a broad inflammasome activation pathway caused by silica exposure.
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Affiliation(s)
- Yingmei Niu
- Occupational Disease and Toxicology Department, Beijing Chao-Yang Hospital, Capital Medical University, Beijing 100020, China
| | - 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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Pizzuto M, Pelegrin P, Ruysschaert JM. Lipid-protein interactions regulating the canonical and the non-canonical NLRP3 inflammasome. Prog Lipid Res 2022; 87:101182. [PMID: 35901922 DOI: 10.1016/j.plipres.2022.101182] [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: 02/04/2022] [Revised: 06/25/2022] [Accepted: 07/24/2022] [Indexed: 01/05/2023]
Abstract
The inflammatory response is a complex regulated effector mechanism of the innate immune system that is initiated after tissue injury or infection. The NLRP3 inflammasome is an important initiator of inflammation by regulating the activation of caspase-1, the maturation of pro-inflammatory cytokines and the induction of pyroptotic cell death. Numerous studies demonstrate that the NLRP3 inflammasome could be modulated by lipids, existing a relation between lipids and the activation of different inflammatory processes. In this review we will summarize how the mechanism of NLRP3 inflammasome activation is regulated by different lipids and how these lipids control specific cellular localization of NLRP3 during activation. Although being a cytosolic protein, NLRP3 interacts with lipids accessible in neighbor membranes. Also, the modulation of NLRP3 by endogenous lipids has been found causative of different metabolic diseases and bacterial-pathogenic lipids lead to NLRP3 activation during infection. The understanding of the modulation of the NLRP3 inflammasome by lipids has resulted not only in a better knowledge about the mechanism of NLRP3 activation and its implication in disease, but also opens a new avenue for the development of novel therapeutics and vaccines, as NLRP3 could be modulated by synthetic lipids used as adjuvants.
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Affiliation(s)
- Malvina Pizzuto
- Molecular Inflammation Group, Biomedical Research Institute of Murcia (IMIB), Murcia, Spain; Laboratoire de Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles, Brussels, Belgium.
| | - Pablo Pelegrin
- Molecular Inflammation Group, Biomedical Research Institute of Murcia (IMIB), Murcia, Spain; Department of Biochemistry and Molecular Biology B and Immunology, Faculty of Biology, University of Murcia, Spain.
| | - Jean-Marie Ruysschaert
- Laboratoire de Structure et Fonction des Membranes Biologiques, Université Libre de Bruxelles, Brussels, Belgium.
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Mata-Martínez E, Díaz-Muñoz M, Vázquez-Cuevas FG. Glial Cells and Brain Diseases: Inflammasomes as Relevant Pathological Entities. Front Cell Neurosci 2022; 16:929529. [PMID: 35783102 PMCID: PMC9243488 DOI: 10.3389/fncel.2022.929529] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 05/27/2022] [Indexed: 12/13/2022] Open
Abstract
Inflammation mediated by the innate immune system is a physiopathological response to diverse detrimental circumstances such as microbe infections or tissular damage. The molecular events that underlie this response involve the assembly of multiprotein complexes known as inflammasomes. These assemblages are essentially formed by a stressor-sensing protein, an adapter protein and a non-apoptotic caspase (1 or 11). The coordinated aggregation of these components mediates the processing and release of pro-inflammatory interleukins (IL-β and IL-18) and cellular death by pyroptosis induction. The inflammatory response is essential for the defense of the organism; for example, it triggers tissue repair and the destruction of pathogen microbe infections. However, when inflammation is activated chronically, it promotes diverse pathologies in the lung, liver, brain and other organs. The nervous system is one of the main tissues where the inflammatory process has been characterized, and its implications in health and disease are starting to be understood. Thus, the regulation of inflammasomes in specific cellular types of the central nervous system needs to be thoroughly understood to innovate treatments for diverse pathologies. In this review, the presence and participation of inflammasomes in pathological conditions in different types of glial cells will be discussed.
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Xu Q, Yang Y, Zhang X, Cai JJ. Association of pyroptosis and severeness of COVID-19 as revealed by integrated single-cell transcriptome data analysis. IMMUNOINFORMATICS (AMSTERDAM, NETHERLANDS) 2022; 6:100013. [PMID: 35434695 PMCID: PMC8994680 DOI: 10.1016/j.immuno.2022.100013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 03/02/2022] [Accepted: 04/07/2022] [Indexed: 02/07/2023]
Abstract
Cytokine storm and inflammatory cytokine release syndrome are often found to be associated with severe instances of the 2019 coronavirus disease (COVID-19). However, factors that contribute to the development of the COVID-19-associated cytokine storm and intensify the hyperinflammatory response are not well known. Here, we integratively analyzed scRNAseq data of 37,607 immune cells of eight different cell types from four studies involving COVID-19 patients in either moderate or severe conditions. Our analysis showed that pyroptosis-a lytic, inflammatory type of programmed cell death-may play a critical role in the SARS-CoV-2-induced cytokine storm. The expression of the key markers of pyroptosis, such as pro-inflammatory cytokine genes IL1B and IL18, is significantly higher in moderate and severe COVID-19 patients than in healthy controls. The pattern is more pronounced in macrophages and neutrophils than in adaptive immune cells such as T cells and B cells. Furthermore, the lack of interferon-gamma (IFN-γ) and overexpression of ninjurin 1 (NINJ1) in macrophages may exacerbate the systemic inflammation, as shown in severe COVID-19 patients. Finally, we developed a scoring metric to quantitatively assess single cell's pyroptotic state and demonstrated the use of this pyroptosis signature score to scRNAseq data. Taken together, our study underscores the importance of the pyroptosis pathway and highlights its clinical relevance, suggesting that pyroptosis is a cellular process that can be a potential target for the treatment of COVID-19 associated diseases.
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Affiliation(s)
- Qian Xu
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77845, USA
| | - Yongjian Yang
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77845, USA
| | - Xiuren Zhang
- Department of Biology, Texas A&M University, College Station, Texas 77845, USA
| | - James J Cai
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77845, USA
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77845, USA
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Zou C, Beard JA, Yang G, Evans WE, Bonten EJ. CASPorter: A Novel Inducible Human CASP1/NALP3/ASC Inflammasome Biosensor. J Inflamm Res 2022; 15:1183-1194. [PMID: 35221708 PMCID: PMC8865862 DOI: 10.2147/jir.s333725] [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: 08/25/2021] [Accepted: 12/28/2021] [Indexed: 11/23/2022] Open
Abstract
Background Following our 2015 elucidation of the CASP1/NALP3 inflammasome mechanism of glucocorticoid (GC)-resistance in pediatric acute lymphoblastic leukemia (ALL) patients, we engineered a cell-based CASP1/NALP3 reporter system suitable for high-throughput screening (HTS) of small molecule libraries, with the purpose of identifying compounds capable of inhibiting the CASP1/NALP3 inflammasome and synergizing with GC drugs for the treatment of GC-resistant ALL patients and various autoinflammatory diseases. Methods A Dox-controlled system was utilized to induce the expression of the ASC transgene in HEK293 cells while simultaneously overexpressing NLRP3 and CASP1. ASC/CASP1/NALP3 inflammasome complex formation was confirmed by co-immunoprecipitation (co-IP) experiments. Next, a LV fluorescence-based biosensor (CASPorter) was transduced in the HEK293-iASC-NLRP3/CASP1 cell line to monitor the real-time activation of CASP1/NALP3 inflammasome in live cells. The applicability and effectiveness of the CASPorter cell line were tested by co-treatment with Dox and four known CASP1/NLRP3 inhibitors (MCC950, Glyburide, VX-765 and VRT-043198). Inflammasome activation and inhibitions were assessed by Western blotting, fluorescence microscopy and flow cytometry (FC) methods. Results Dox treatment significantly induced ASC expression and increased levels of cleaved and catalytically active CASP1, co-IPs further demonstrated that CASP1 was pulled-down with NLRP3 in HEK293-iASC-NLRP3/CASP1 cells after induction of ASC by Dox treatment. In HEK293-iASC-NLRP3/CASP1-CASPorter cell system, cleavage of the CASP1 consensus site (YVAD) in the CASPorter protein after Dox treatment causing excitation/emission of green fluorescence and the 71% GFP+ cell population increase quantified by FC (78.1% vs 6.90%). Dox-induced activation of the NLRP3 inflammasome was dose-dependently inhibited by Dox co-treatment with four known CASP1/NLRP3 inhibitors. Conclusion We have established a cell-based CASP1/NLRP3 inflammasome model, utilizing a fluorescence biosensor as readout for qualitatively observing and quantitatively determining the activation of caspase 1 and NLRP3 inflammasomes in living cells and easily define the inhibitory effect of inhibitors with high efficacy.
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Affiliation(s)
- Chan Zou
- Department of Pharmaceutical Sciences, St. Jude Children’s Research Hospital, Memphis, TN, USA
- Center for Clinical Pharmacology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China
| | - Jordan A Beard
- Department of Pharmaceutical Sciences, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Guoping Yang
- Center for Clinical Pharmacology, The Third Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China
- Department of Pharmacy, The Third Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China
- Research Center for Drug Clinical Evaluation of Central South University, Changsha, Hunan, People’s Republic of China
- Guoping Yang, Center for Clinical Pharmacology, the Third Xiangya Hospital, Central South University, Changsha, Hunan, People’s Republic of China, Tel/Fax +86 731 88618933, Email
| | - William E Evans
- Department of Pharmaceutical Sciences, St. Jude Children’s Research Hospital, Memphis, TN, USA
| | - Erik J Bonten
- Department of Pharmaceutical Sciences, St. Jude Children’s Research Hospital, Memphis, TN, USA
- Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN, USA
- Correspondence: Erik J Bonten, Department of Chemical Biology and Therapeutics, St. Jude Children’s Research Hospital, Memphis, TN, USA, Tel +1 901 595-3980, Fax +1 901 5955715, Email
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Oliveira-Mendonça LS, Mendes ÉA, Castro JO, Silva MM, Santos AG, Kaneto CM, Dias SO, Allaman IB, Vannier-Santos MA, Silva JF, Augusto DG, Anjos DOD, Santos NAS, Lima KP, Horta MF, Albuquerque GR, Costa MGC, Silva-Jardim I, Santos JLD. Trichoderma stromaticum spores induce autophagy and downregulate inflammatory mediators in human peripheral blood-derived macrophages. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 3:100145. [PMID: 35909603 PMCID: PMC9325901 DOI: 10.1016/j.crmicr.2022.100145] [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] [Indexed: 11/13/2022] Open
Abstract
T. stromaticum biocontrol agent induces autophagy, up-regulating autophagy-related genes T. stromaticum modulates expression of micro RNAs that control imune response T. stromaticum dow-nregulates expression of TLR2, TLR4, CLEC7A, NLRP3, IL-10, IL1β and IL18 T. stromaticum modulates ROS production
Trichoderma spp. are usually considered safe and normally used as biocontrol and biofertilization. Safety for human health is evaluated by several tests that detect various effects such as allergenicity, toxicity, infectivity, and pathogenicity. However, they do not evaluate the effects of the agent upon the immune system. The aim of this study was to investigate the interaction between T. stromaticum spores and mammalian cells to assess the immunomodulatory potential of the spores of this fungus. First, mouse macrophage cell line J774 and human macrophages were exposed to fungal spores and analyzed for structural features, through scanning and transmission electron microscopy. Then, various analysis were performed in human macrophages as to their effect in some functional and molecular aspects of the immune system through immunocytochemistry, flow cytometry and gene expression assays. We demonstrated that T. stromaticum spores induces autophagy and autophagy-related genes (ATGs) and downmodulate inflammatory mediators, including ROS, NLRP3, the cytokines IL-1β, IL-18, IL-12 and IL-10, as well as TLR2, TLR4, miR-146b and miR-155, which may lead to an augmented susceptibility to pathogens. Our study shows the extension of damages the biofungicide Tricovab® can cause in the innate immune response. Further studies are necessary to elucidate other innate and adaptive immune responses and, consequently, the safety of this fungus when in contact with humans.
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Jastrząb R, Graczyk D, Siedlecki P. Molecular and Cellular Mechanisms Influenced by Postbiotics. Int J Mol Sci 2021; 22:ijms222413475. [PMID: 34948270 PMCID: PMC8707144 DOI: 10.3390/ijms222413475] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/29/2021] [Accepted: 12/07/2021] [Indexed: 12/12/2022] Open
Abstract
In recent years, commensal bacteria colonizing the human body have been recognized as important determinants of health and multiple pathologic conditions. Among the most extensively studied commensal bacteria are the gut microbiota, which perform a plethora of functions, including the synthesis of bioactive products, metabolism of dietary compounds, and immunomodulation, both through attenuation and immunostimulation. An imbalance in the microbiota population, i.e., dysbiosis, has been linked to many human pathologies, including various cancer types and neurodegenerative diseases. Targeting gut microbiota and microbiome-host interactions resulting from probiotics, prebiotics, and postbiotics is a growing opportunity for the effective treatment of various diseases. As more research is being conducted, the microbiome field is shifting from simple descriptive analysis of commensal compositions to more molecular, cellular, and functional studies. Insight into these mechanisms is of paramount importance for understanding and modulating the effects that microbiota, probiotics, and their derivatives exert on host health.
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12
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Inflammasome Inhibitors. Molecules 2021; 26:molecules26226912. [PMID: 34834004 PMCID: PMC8625935 DOI: 10.3390/molecules26226912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 11/15/2021] [Indexed: 11/17/2022] Open
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Gastaldi S, Boscaro V, Gianquinto E, Sandall CF, Giorgis M, Marini E, Blua F, Gallicchio M, Spyrakis F, MacDonald JA, Bertinaria M. Chemical Modulation of the 1-(Piperidin-4-yl)-1,3-dihydro-2 H-benzo[d]imidazole-2-one Scaffold as a Novel NLRP3 Inhibitor. Molecules 2021; 26:molecules26133975. [PMID: 34209843 PMCID: PMC8271538 DOI: 10.3390/molecules26133975] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 06/23/2021] [Accepted: 06/23/2021] [Indexed: 02/06/2023] Open
Abstract
In the search for new chemical scaffolds able to afford NLRP3 inflammasome inhibitors, we used a pharmacophore-hybridization strategy by combining the structure of the acrylic acid derivative INF39 with the 1-(piperidin-4-yl)1,3-dihydro-2H-benzo[d]imidazole-2-one substructure present in HS203873, a recently identified NLRP3 binder. A series of differently modulated benzo[d]imidazole-2-one derivatives were designed and synthesised. The obtained compounds were screened in vitro to test their ability to inhibit NLRP3-dependent pyroptosis and IL-1β release in PMA-differentiated THP-1 cells stimulated with LPS/ATP. The selected compounds were evaluated for their ability to reduce the ATPase activity of human recombinant NLRP3 using a newly developed assay. From this screening, compounds 9, 13 and 18, able to concentration-dependently inhibit IL-1β release in LPS/ATP-stimulated human macrophages, emerged as the most promising NLRP3 inhibitors of the series. Computational simulations were applied for building the first complete model of the NLRP3 inactive state and for identifying possible binding sites available to the tested compounds. The analyses led us to suggest a mechanism of protein–ligand binding that might explain the activity of the compounds.
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Affiliation(s)
- Simone Gastaldi
- Department of Drug Science and Technology, University of Turin, Via Giuria 9, 10125 Torino, Italy; (S.G.); (V.B.); (E.G.); (M.G.); (E.M.); (F.B.); (M.G.); (F.S.)
| | - Valentina Boscaro
- Department of Drug Science and Technology, University of Turin, Via Giuria 9, 10125 Torino, Italy; (S.G.); (V.B.); (E.G.); (M.G.); (E.M.); (F.B.); (M.G.); (F.S.)
| | - Eleonora Gianquinto
- Department of Drug Science and Technology, University of Turin, Via Giuria 9, 10125 Torino, Italy; (S.G.); (V.B.); (E.G.); (M.G.); (E.M.); (F.B.); (M.G.); (F.S.)
| | - Christina F. Sandall
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine, University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 4Z6, Canada; (C.F.S.); (J.A.M.)
| | - Marta Giorgis
- Department of Drug Science and Technology, University of Turin, Via Giuria 9, 10125 Torino, Italy; (S.G.); (V.B.); (E.G.); (M.G.); (E.M.); (F.B.); (M.G.); (F.S.)
| | - Elisabetta Marini
- Department of Drug Science and Technology, University of Turin, Via Giuria 9, 10125 Torino, Italy; (S.G.); (V.B.); (E.G.); (M.G.); (E.M.); (F.B.); (M.G.); (F.S.)
| | - Federica Blua
- Department of Drug Science and Technology, University of Turin, Via Giuria 9, 10125 Torino, Italy; (S.G.); (V.B.); (E.G.); (M.G.); (E.M.); (F.B.); (M.G.); (F.S.)
| | - Margherita Gallicchio
- Department of Drug Science and Technology, University of Turin, Via Giuria 9, 10125 Torino, Italy; (S.G.); (V.B.); (E.G.); (M.G.); (E.M.); (F.B.); (M.G.); (F.S.)
| | - Francesca Spyrakis
- Department of Drug Science and Technology, University of Turin, Via Giuria 9, 10125 Torino, Italy; (S.G.); (V.B.); (E.G.); (M.G.); (E.M.); (F.B.); (M.G.); (F.S.)
| | - Justin A. MacDonald
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine, University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 4Z6, Canada; (C.F.S.); (J.A.M.)
| | - Massimo Bertinaria
- Department of Drug Science and Technology, University of Turin, Via Giuria 9, 10125 Torino, Italy; (S.G.); (V.B.); (E.G.); (M.G.); (E.M.); (F.B.); (M.G.); (F.S.)
- Correspondence: ; Tel.: +39-011-6707146
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