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Yuan W, Liu T, Wang YY, He S, Zhang F, Wang XB, Deng SH, Zhang T, Wu DM, Xu Y. Autophagy induced by PP121 alleviates MSU crystal-induced acute gouty arthritis via inhibition of the NLRP3 inflammasome. Int Immunopharmacol 2023; 123:110756. [PMID: 37573689 DOI: 10.1016/j.intimp.2023.110756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/28/2023] [Accepted: 07/31/2023] [Indexed: 08/15/2023]
Abstract
Acute gouty arthritis (AGA) is a frequent self-limiting inflammatory condition produced by the deposition of monosodium urate (MSU) crystals in the joints and periarticular tissues of patients with hyperuricemia. However, no effective interventional measures currently exist for AGA. Pyroptosis, a kind of pro-inflammatory programmed cell death, plays a crucial role in MSU crystal-induced inflammation and represents a potential treatment target for AGA. Therefore, we determined the therapeutic benefits and mechanism of PP121, a pyroptosis-related compound, on AGA. First, we injected an MSU crystal solution intra-articularly into the left foot pad of C57BL/6 mice to create an AGA mouse model. Subsequent treatment with PP121 substantially decreased tissue damage, pro-inflammatory cytokine release, and inflammatory cell infiltration caused by MSU crystals in the ankle joint. Consistent with these observations, the beneficial effects of PP121 on AGA were cancelled in Beclin1+/-(Becn1+/-) mice. Furthermore, after PP121 treatment, super-resolution microscopy revealed a strong relationship between lysosome-connected membrane protein/light chain 3 positive vesicles and the nucleotide-binding domain of leucine-rich family pyrin domain-containing 3 (NLPR3), demonstrating that PP121 promotes phagocytosis of the NLPR3 inflammasome. In summary, PP121-mediated autophagy can improve degradation of the NLRR3 inflammasome in AGA, which suggests the therapeutic potential of PP121 in AGA.
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Affiliation(s)
- Wei Yuan
- School of Clinical Medicine & The First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China.
| | - Teng Liu
- School of Clinical Medicine & The First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China.
| | - Yuan-Yi Wang
- School of Clinical Medicine & The First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China.
| | - Shuang He
- School of Clinical Medicine & The First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China.
| | - Feng Zhang
- Laboratory Medical College of Chengdu Medical College, Chengdu 610500, China.
| | - Xiao-Bian Wang
- Laboratory Medical College of Chengdu Medical College, Chengdu 610500, China.
| | - Shi-Hua Deng
- School of Clinical Medicine & The First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China.
| | - Ting Zhang
- School of Clinical Medicine & The First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China.
| | - Dong-Ming Wu
- School of Clinical Medicine & The First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China.
| | - Ying Xu
- School of Clinical Medicine & The First Affiliated Hospital of Chengdu Medical College, Chengdu 610500, China.
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2
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Futosi K, Németh T, Horváth ÁI, Abram CL, Tusnády S, Lowell CA, Helyes Z, Mócsai A. Myeloid Src-family kinases are critical for neutrophil-mediated autoinflammation in gout and motheaten models. J Exp Med 2023; 220:e20221010. [PMID: 37074415 PMCID: PMC10120404 DOI: 10.1084/jem.20221010] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 01/27/2023] [Accepted: 03/28/2023] [Indexed: 04/20/2023] Open
Abstract
Autoinflammatory diseases include a number of monogenic systemic inflammatory diseases, as well as acquired autoinflammatory diseases such as gout. Here, we show that the myeloid Src-family kinases Hck, Fgr, and Lyn are critical for experimental models of gout, as well as for genetically determined systemic inflammation in the Ptpn6me-v/me-v (motheaten viable) mouse model. The Hck-/-Fgr-/-Lyn-/- mutation abrogated various monosodium urate (MSU) crystal-induced pro-inflammatory responses of neutrophils, and protected mice from the development of gouty arthritis. The Src-family inhibitor dasatinib abrogated MSU crystal-induced responses of human neutrophils and reduced experimental gouty arthritis in mice. The Hck-/-Fgr-/-Lyn-/- mutation also abrogated spontaneous inflammation and prolonged the survival of the Ptpn6me-v/me-v mice. Spontaneous adhesion and superoxide release of Ptpn6me-v/me-v neutrophils were also abolished by the Hck-/-Fgr-/-Lyn-/- mutation. Excessive activation of tyrosine phosphorylation pathways in myeloid cells may characterize a subset of autoinflammatory diseases.
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Affiliation(s)
- Krisztina Futosi
- Department of Physiology, School of Medicine, Semmelweis University, Budapest, Hungary
- ELKH-SE Inflammation Physiology Research Group, Eötvös Loránd Research Network and Semmelweis University, Budapest, Hungary
| | - Tamás Németh
- Department of Physiology, School of Medicine, Semmelweis University, Budapest, Hungary
- MTA-SE “Lendület” Translational Rheumatology Research Group, Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary
- Department of Rheumatology and Clinical Immunology, Semmelweis University, Budapest, Hungary
- Department of Internal Medicine and Oncology, Semmelweis University, Budapest, Hungary
| | - Ádám I. Horváth
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre, Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Clare L. Abram
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Simon Tusnády
- Department of Physiology, School of Medicine, Semmelweis University, Budapest, Hungary
| | - Clifford A. Lowell
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, Medical School and János Szentágothai Research Centre, Centre for Neuroscience, University of Pécs, Pécs, Hungary
- PharmInVivo Ltd., Pécs, Hungary
| | - Attila Mócsai
- Department of Physiology, School of Medicine, Semmelweis University, Budapest, Hungary
- ELKH-SE Inflammation Physiology Research Group, Eötvös Loránd Research Network and Semmelweis University, Budapest, Hungary
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3
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Chouinard FC, Davis L, Gilbert C, Bourgoin SG. Functional Role of AGAP2/PIKE-A in Fcγ Receptor-Mediated Phagocytosis. Cells 2022; 12:cells12010072. [PMID: 36611866 PMCID: PMC9818964 DOI: 10.3390/cells12010072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022] Open
Abstract
In phagocytes, cytoskeletal and membrane remodeling is finely regulated at the phagocytic cup. Various smaFll G proteins, including those of the Arf family, control these dynamic processes. Human neutrophils express AGAP2, an Arf GTPase activating protein (ArfGAP) that regulates endosomal trafficking and focal adhesion remodeling. We first examined the impact of AGAP2 on phagocytosis in CHO cells stably expressing the FcγRIIA receptor (CHO-IIA). In unstimulated CHO-IIA cells, AGAP2 only partially co-localized with cytoskeletal elements and intracellular compartments. In CHO-IIA cells, AGAP2 transiently accumulated at actin-rich phagocytic cups and increased Fcγ receptor-mediated phagocytosis. Enhanced phagocytosis was not dependent on the N-terminal GTP-binding protein-like (GLD) domain of AGAP2. AGAP2 deleted of its GTPase-activating protein (GAP) domain was not recruited to phagocytic cups and did not enhance the engulfment of IgG-opsonized beads. However, the GAP-deficient [R618K]AGAP2 transiently localized at the phagocytic cups and enhanced phagocytosis. In PLB-985 cells differentiated towards a neutrophil-like phenotype, silencing of AGAP2 reduced phagocytosis of opsonized zymosan. In human neutrophils, opsonized zymosan or monosodium urate crystals induced AGAP2 phosphorylation. The data indicate that particulate agonists induce AGAP2 phosphorylation in neutrophils. This study highlights the role of AGAP2 and its GAP domain but not GAP activity in FcγR-dependent uptake of opsonized particles.
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Affiliation(s)
- François C. Chouinard
- Centre de Recherche du CHU de Québec—Université Laval, Québec City, QC G1V 4G2, Canada
| | - Lynn Davis
- Centre de Recherche du CHU de Québec—Université Laval, Québec City, QC G1V 4G2, Canada
| | - Caroline Gilbert
- Centre de Recherche du CHU de Québec—Université Laval, Québec City, QC G1V 4G2, Canada
- Département de Microbiologie-Infectiologie et D’immunologie, Université Laval, Québec City, QC G1V 0A6, Canada
| | - Sylvain G. Bourgoin
- Centre de Recherche du CHU de Québec—Université Laval, Québec City, QC G1V 4G2, Canada
- Département de Microbiologie-Infectiologie et D’immunologie, Université Laval, Québec City, QC G1V 0A6, Canada
- Centre ARThrite de L’université Laval, Québec City, QC G1V 4G2, Canada
- Correspondence:
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4
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Fattori V, Staurengo-Ferrari L, Zaninelli TH, Casagrande R, Oliveira RD, Louzada-Junior P, Cunha TM, Alves-Filho JC, Teixeira MM, Cunha FQ, Amaral FA, Verri WA. IL-33 enhances macrophage release of IL-1β and promotes pain and inflammation in gouty arthritis. Inflamm Res 2020; 69:1271-1282. [PMID: 32886146 DOI: 10.1007/s00011-020-01399-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/29/2020] [Accepted: 08/30/2020] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE To investigate the role of IL-33 in gouty arthritis. MATERIAL 174 Balb/c (wild-type) and 54 ST2-/- mice were used in this study. In vitro experiments were conducted in bone marrow-derived macrophages (BMDMs). Synovial fluid samples from gouty arthritis (n = 7) and osteoarthritis (n = 8) hospital patients were used to measure IL-33 and sST2 levels. METHODS Gout was induced by injection of monosodium urate (MSU) crystals in the knee joint of mice. Pain was determined using the electronic von Frey and static weight bearing. Neutrophil recruitment was determined by H&E staining, Rosenfeld staining slides, and MPO activity. ELISA was used for cytokine and sST2 measurement. The priming effect of IL-33 was determined in BMDM. RESULTS Synovial fluid of gout patients showed higher IL-33 levels and neutrophil counts than osteoarthritis patients. In mice, the absence of ST2 prevented mechanical pain, knee joint edema, neutrophil recruitment to the knee joint, and lowered IL-1β and superoxide anion levels. In macrophages, IL-33 enhanced the release of IL-1β and TNF-α, and BMDMs from ST2-/- showed reduced levels of these cytokines after stimulus with MSU crystals. CONCLUSION IL-33 mediates gout pain and inflammation by boosting macrophages production of cytokines upon MSU crystals stimulus.
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Affiliation(s)
- Victor Fattori
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, Brazil
| | - Larissa Staurengo-Ferrari
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, Brazil
| | - Tiago H Zaninelli
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, Brazil
| | - Rubia Casagrande
- Department of Pharmaceutical Science, Londrina State University, Londrina, Brazil
| | - Rene D Oliveira
- Division of Clinical Immunology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Paulo Louzada-Junior
- Division of Clinical Immunology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Thiago M Cunha
- Department of Pharmacology, Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Jose C Alves-Filho
- Department of Pharmacology, Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Mauro M Teixeira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas (ICB), Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, Center for Research in Inflammatory Diseases, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Flavio A Amaral
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas (ICB), Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Waldiceu A Verri
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, Brazil.
- Departamento de Ciências Patológicas, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid, PR 445, KM 380, PO Box 10.011, Londrina, Parana, 86057-970, Brazil.
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5
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Miao S, Lu M, Liu Y, Shu D, Zhu Y, Song W, Ma Y, Ma R, Zhang B, Fang C, Ming ZY. Platelets are recruited to hepatocellular carcinoma tissues in a CX3CL1-CX3CR1 dependent manner and induce tumour cell apoptosis. Mol Oncol 2020; 14:2546-2559. [PMID: 32799418 PMCID: PMC7530782 DOI: 10.1002/1878-0261.12783] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 06/18/2020] [Accepted: 08/13/2020] [Indexed: 12/22/2022] Open
Abstract
The mechanisms and biological functions of migrating platelets in cancer remain largely unknown. Here, we analyzed platelet infiltration in hepatocellular carcinoma. We detected platelet extravasation in both mouse and human HCC tissues. CX3CL1 directly induced platelet migration, and hypoxia enhanced platelet migration by upregulating CX3CL1 expression. Knocking down CX3CL1 in HCC cells reduced platelet migration in vitro, as well as infiltration of HCC tissue in an orthotopic HCC mouse model. Components of the CX3CR1/Syk/PI3K pathway were essential for CX3CL1‐induced platelet migration. Migrating platelets induced HCC cell apoptosis in vitro, as indicated by a reduced mitochondrial membrane potential and an increased percentage of apoptotic cells. In the orthotopic tumor implantation model, decreased platelet infiltration was associated with accelerated tumor growth. Taken together, our findings indicate that HCC cell‐derived CX3CL1 contributes to tumor infiltration by platelets, which in turn promotes apoptosis of HCC cells.
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Affiliation(s)
- Shuo Miao
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.,School of Basic Medicine, Qingdao University, Qingdao, China.,The Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Meng Lu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.,The Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Yue Liu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.,The Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Dan Shu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.,The Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Ying Zhu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.,The Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Wei Song
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.,Department of Pharmacy, Renmin Hospital, Wuhan University, Wuhan, China
| | - Yuanyuan Ma
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.,Pharmacy Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rong Ma
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.,The Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Bixiang Zhang
- Department of Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chao Fang
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.,The Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China
| | - Zhang-Yin Ming
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.,The Key Laboratory for Drug Target Research and Pharmacodynamic Evaluation of Hubei Province, Wuhan, China.,Tongji-Rongcheng Center for Biomedicine, Huazhong University of Science and Technology, Wuhan, China
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6
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The development of a targeted and more potent, anti-Inflammatory derivative of colchicine: Implications for gout. Biochem Pharmacol 2020; 180:114125. [PMID: 32598947 DOI: 10.1016/j.bcp.2020.114125] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 06/19/2020] [Accepted: 06/24/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Colchicine is routinely used for its anti-inflammatory properties to treat gout and Familial Mediterranean fever. More recently, it was also shown to be of therapeutic benefit for another group of diseases in which inflammation is a key component, namely, cardiovascular disease. Whilst there is considerable interest in repurposing this alkaloid, it has a narrow therapeutic index and is associated with undesirable side effects and drug interactions. We, therefore, developed a derivatives of colchicine that preferentially target leukocytes to increase their potency and diminish their side effects. The anti-inflammatory activity of the colchicine derivatives was tested in experimental models of neutrophil activation by the etiological agent of gout, monosodium urate crystals (MSU). METHODS Using a rational drug design approach, the structure of colchicine was modified to increase its affinity for βVI-tubulin, a colchicine ligand preferentially expressed by immune cells. The ability of the colchicine analogues with the predicted highest affinity for βVI-tubulin to dampen neutrophil responses to MSU was determined with in vitro assays that measure MSU-induced production of ROS, release of IL-1 and CXCL8/IL-8, and the increase in the concentration of cytoplasmic calcium. The anti-inflammatory property of the derivatives was assessed in the air pouch model of MSU-induced inflammation in mice. RESULTS The most effective compound generated, CCI, is more potent than colchicine in all the in vitro assays. It inhibits neutrophil responses to MSU in vitro at concentrations 10-100-fold lower than colchicine. Similarly, in vivo, CCI inhibits the MSU-induced recruitment of leukocytes at a 10-fold lower concentration than colchicine when administered prior to or after MSU. CONCLUSIONS We provide evidence that colchicine can be rendered more potent atinhibiting MSU-induced neutrophil activation and inflammation using a rational drug design approach. The development of compounds such as CCI will provide more efficacious drugs that will not only alleviate gout patients of their painful inflammatory episodes at significantly lower doses than colchicine, but also be of potential therapeutic benefit for patients with other diseases treated with colchicine.
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7
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Tatsiy O, Mayer TZ, de Carvalho Oliveira V, Sylvain-Prévost S, Isabel M, Dubois CM, McDonald PP. Cytokine Production and NET Formation by Monosodium Urate-Activated Human Neutrophils Involves Early and Late Events, and Requires Upstream TAK1 and Syk. Front Immunol 2020; 10:2996. [PMID: 32010124 PMCID: PMC6974451 DOI: 10.3389/fimmu.2019.02996] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 12/05/2019] [Indexed: 01/08/2023] Open
Abstract
Gout is a prevalent and incapacitating disease triggered by the deposition of monosodium urate (MSU) crystals in joints, which are also massively infiltrated by neutrophils. The interaction of the latter with MSU crystals triggers several responses, including the generation of inflammatory mediators and of neutrophil extracellular traps (NETs). Though some of the signaling events mobilized by MSU in neutrophils have been described (e.g., Src family kinases, Syk, PKC, PI3K), the picture remains fragmentary. Likewise, the impact of these signaling events on cellular responses is incompletely understood. In this study, we examined transcriptomic changes triggered by MSU in neutrophils and their impact on the corresponding proteins, as well as the role of various signaling pathways in prominent functional responses. We report for the first time that neutrophils can secrete the monocyte chemoattractant, CCL4, in response to MSU. Accordingly, we found that transcription factors NF-κB, CREB, and C/EBP are belatedly activated by MSU crystals, and at least the former is involved in chemokine generation. Moreover, we show that MAPKs and Akt are activated by MSU in neutrophils, that they are under the control of TAK1 and Syk, and that they participate in cytokine generation and NETosis. In the latter instance, we found the phenomenon to be independent of endogenous ROS, but under the control of PAD4. We finally provide evidence that endogenous factors contribute to the belated phosphorylation of kinases and transcription factors in response to MSU. Collectively, our findings unveil potentially important therapeutic targets for gouty arthritis.
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Affiliation(s)
- Olga Tatsiy
- Pulmonary Division, Faculty of Medicine, Université de Sherbrooke and Centre de recherche du CHUS (CRCHUS), Sherbrooke, QC, Canada.,Department of Immunology and Cell Biology, Faculty of Medicine, Université de Sherbrooke and CRCHUS, Sherbrooke, QC, Canada
| | - Thomas Z Mayer
- Pulmonary Division, Faculty of Medicine, Université de Sherbrooke and Centre de recherche du CHUS (CRCHUS), Sherbrooke, QC, Canada.,Department of Immunology and Cell Biology, Faculty of Medicine, Université de Sherbrooke and CRCHUS, Sherbrooke, QC, Canada
| | - Vanessa de Carvalho Oliveira
- Pulmonary Division, Faculty of Medicine, Université de Sherbrooke and Centre de recherche du CHUS (CRCHUS), Sherbrooke, QC, Canada.,Department of Immunology and Cell Biology, Faculty of Medicine, Université de Sherbrooke and CRCHUS, Sherbrooke, QC, Canada
| | - Stéphanie Sylvain-Prévost
- Pulmonary Division, Faculty of Medicine, Université de Sherbrooke and Centre de recherche du CHUS (CRCHUS), Sherbrooke, QC, Canada
| | - Marilyn Isabel
- Pulmonary Division, Faculty of Medicine, Université de Sherbrooke and Centre de recherche du CHUS (CRCHUS), Sherbrooke, QC, Canada
| | - Claire M Dubois
- Department of Immunology and Cell Biology, Faculty of Medicine, Université de Sherbrooke and CRCHUS, Sherbrooke, QC, Canada
| | - Patrick P McDonald
- Pulmonary Division, Faculty of Medicine, Université de Sherbrooke and Centre de recherche du CHUS (CRCHUS), Sherbrooke, QC, Canada
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8
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Tavares LD, Galvão I, Costa VV, Batista NV, Rossi LCR, Brito CB, Reis AC, Queiroz-Junior CM, Braga AD, Coelho FM, Dias AC, Zamboni DS, Pinho V, Teixeira MM, Amaral FA, Souza DG. Phosphoinositide-3 kinase gamma regulates caspase-1 activation and leukocyte recruitment in acute murine gout. J Leukoc Biol 2019; 106:619-629. [PMID: 31392775 DOI: 10.1002/jlb.ma1118-470rr] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 07/09/2019] [Accepted: 07/14/2019] [Indexed: 12/20/2022] Open
Abstract
This study investigates the participation of PI3Kγ in the development of joint inflammation and dysfunction in an experimental model of acute gout in mice. Acute gout was induced by injection of monosodium urate (MSU) crystals into the tibiofemoral joint of mice. The involvement of PI3Kγ was evaluated using a selective inhibitor and mice deficient for PI3Kγ (PI3Kγ-/- ) or with loss of kinase activity. Neutrophils recovered from the inflamed joint were quantified and stained for phosphorylated Akt (pAkt) and production of reactive oxygen species (ROS). The adherence of leukocytes to the joint microvasculature was assessed by intravital microscopy and cleaved caspase-1 by Western blot. Injection of MSU crystals induced massive accumulation of neutrophils expressing phosphorylated Akt. In the absence of PI3Kγ, there was reduction of pAkt expression, chemokine production, and neutrophil recruitment. Genetic or pharmacological inhibition of PI3Kγ reduced the adherence of leukocytes to the joint microvasculature, even in joints with established inflammation. Neutrophils from PI3Kγ-/- mice produced less ROS than wild-type neutrophils. There was decreased joint damage and dysfunction in the absence of PI3Kγ. In addition, in the absence of PI3Kγ activity, there was reduction of cleaved caspase-1 and IL-1β production in synovial tissue after injection of MSU crystals and leukotriene B4 . Our studies suggest that PI3Kγ is crucial for MSU crystal-induced acute joint inflammation. It is necessary for regulating caspase-1 activation and for mediating neutrophil migration and activation. Drugs that impair PI3Kγ function may be useful to control acute gout inflammation.
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Affiliation(s)
- Lívia D Tavares
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Izabela Galvão
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Vivian V Costa
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Nathalia V Batista
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Lívia C R Rossi
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Camila B Brito
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Alesandra C Reis
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Celso M Queiroz-Junior
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Amanda D Braga
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Fernanda M Coelho
- Vollum Institute, Oregon Health and Science University, Portland, Oregon, USA
| | - Ana C Dias
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Dario S Zamboni
- Department of Cell Biology, Medical School of Ribeirão Preto, University of São Paulo FMRP/USP, Ribeirão Preto, São Paulo, Brazil
| | - Vanessa Pinho
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Mauro M Teixeira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Flávio A Amaral
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Daniele G Souza
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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9
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Galvão I, Queiroz-Junior CM, de Oliveira VLS, Pinho V, Hirsch E, Teixeira MM. The Inhibition of Phosphoinositide-3 Kinases Induce Resolution of Inflammation in a Gout Model. Front Pharmacol 2019; 9:1505. [PMID: 30666201 PMCID: PMC6330337 DOI: 10.3389/fphar.2018.01505] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 12/10/2018] [Indexed: 01/11/2023] Open
Abstract
Phosphoinositide-3 kinases (PI3Ks) are central signaling enzymes that are involved in many aspects of immune cell function. PI3Kγ and PI3Kδ are the major isoforms expressed in leukocytes. The role of PI3K isoforms in the resolution of inflammation is still poorly understood. Here, we investigated the contribution of PI3Kγ and PI3Kδ to the resolution of inflammation in a model of gout in mice. Methods and Results: Experiments were performed in wild-type male C57/Bl6 mice. Selective inhibitors of PI3K-γ (AS605240) or PI3Kδ (GSK045) were injected in the joint 12 h after injection of MSU crystals, hence at the peak of inflammation. Inhibition of either PI3K isoform decreased number of neutrophils that migrated in response to the injection of MSU crystals. This was associated with reduction of myeloperoxidase activity and IL-1β levels in periarticular tissues and reduction of histological score. Joint dysfunction, as seen by reduced mechanical hypernociception, was improved by treatment with either inhibitor. The decrease in neutrophil numbers was associated with enhanced apoptosis and efferocytosis of these cells. There was shortening of resolution intervals, suggesting inhibition of either isoform induced the resolution of neutrophilic inflammation. Blockade of PI3Kγ or PI3Kδ reduced Nuclear Factor kappa B (NF-κB) activation. A pan-PI3K inhibitor (CL27c) reduced inflammation induced by MSU crystals by a magnitude that was similar to that attained by the PI3Kγ or PI3Kδ selective inhibitors alone. Conclusion: Taken together, these results suggest that neutrophils can use PI3Kγ or PI3Kδ to remain in the cavity and blockade of either isoenzyme is sufficient to induce their apoptosis and resolve inflammation in a murine model of gout.
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Affiliation(s)
- Izabela Galvão
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Celso Martins Queiroz-Junior
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Vivian Louise Soares de Oliveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Vanessa Pinho
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Emilio Hirsch
- Department of Molecular Biotechnology and Health Sciences, University of Turin, Turin, Italy
| | - Mauro Martins Teixeira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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10
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Staurengo-Ferrari L, Ruiz-Miyazawa KW, Pinho-Ribeiro FA, Fattori V, Zaninelli TH, Badaro-Garcia S, Borghi SM, Carvalho TT, Alves-Filho JC, Cunha TM, Cunha FQ, Casagrande R, Verri WA. Trans-Chalcone Attenuates Pain and Inflammation in Experimental Acute Gout Arthritis in Mice. Front Pharmacol 2018; 9:1123. [PMID: 30333752 PMCID: PMC6176465 DOI: 10.3389/fphar.2018.01123] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 09/13/2018] [Indexed: 01/23/2023] Open
Abstract
Gouty arthritis is characterized by an intense inflammatory response to monosodium urate crystals (MSU), which induces severe pain and reduction in the life quality of patients. Trans-Chalcone (1,3-diphenyl-2-propen-1-one) is a flavonoid precursor presenting biological activities such as anti-inflammatory and antioxidant proprieties. Thus, the aim of this work was to evaluate the protective effects of trans-Chalcone in experimental gout arthritis in mice. Mice were treated with trans-Chalcone (3, 10, or 30 mg/kg, per oral) or vehicle (Tween 80 20% plus saline) 30 min before intra-articular injection of MSU (100 μg/knee joint, intra-articular). We observed that trans-Chalcone inhibited MSU-induced mechanical hyperalgesia, edema, and leukocyte recruitment (total leukocytes, neutrophils, and mononuclear cells) in a dose-dependent manner. Trans-Chalcone also decreased inflammatory cell recruitment as observed in Hematoxylin and Eosin (HE) staining and the intensity of fluorescence of LysM-eGFP+ cells in the confocal microscopy. Trans-Chalcone reduced MSU-induced oxidative stress as observed by an increase in the antioxidant defense [Glutathione (GSH), Ferric Reducing (FRAP), and 2,2’-Azinobis-3-ethylbenzothiazoline 6-sulfonic acid (ABTS assays)] and reduction in reactive oxygen and nitrogen species production [superoxide anion (NBT assay) and nitrite (NO assay)]. Furthermore, it reduced in vivo MSU-induced interleukin-1β (IL-1β), Tumor necrosis factor-α (TNF-α), and IL-6 production, and increased Transforming growth factor-β (TGF-β) production. Importantly, trans-Chalcone reduced nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) activation and thereby the mRNA expression of the inflammasome components Nlrp3 (cryopyrin), Asc (apoptosis-associated speck-like protein containing a CARD), Pro-caspase-1 and Pro-IL-1β. In vitro, trans-Chalcone reduced the MSU-induced release of IL-1β in lipopolysaccharide (LPS)-primed macrophages. Therefore, the pharmacological effects of trans-Chalcone indicate its therapeutic potential as an analgesic and anti-inflammatory flavonoid for the treatment of gout.
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Affiliation(s)
| | - Kenji W Ruiz-Miyazawa
- Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Felipe A Pinho-Ribeiro
- Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Victor Fattori
- Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Tiago H Zaninelli
- Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | | | - Sergio M Borghi
- Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Thacyana T Carvalho
- Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Jose C Alves-Filho
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Thiago M Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Rubia Casagrande
- Departamento de Ciências Farmacêuticas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Waldiceu A Verri
- Departamento de Ciências Patológicas, Universidade Estadual de Londrina, Londrina, Brazil
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11
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Fattori V, Zarpelon AC, Staurengo-Ferrari L, Borghi SM, Zaninelli TH, Da Costa FB, Alves-Filho JC, Cunha TM, Cunha FQ, Casagrande R, Arakawa NS, Verri WA. Budlein A, a Sesquiterpene Lactone From Viguiera robusta, Alleviates Pain and Inflammation in a Model of Acute Gout Arthritis in Mice. Front Pharmacol 2018; 9:1076. [PMID: 30319413 PMCID: PMC6167909 DOI: 10.3389/fphar.2018.01076] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 09/05/2018] [Indexed: 01/27/2023] Open
Abstract
Background: Gout is the most common inflammatory arthritis worldwide. It is a painful inflammatory disease induced by the deposition of monosodium urate (MSU) crystals in the joints and peri-articular tissues. Sesquiterpene lactones (SLs) are secondary metabolite biosynthesized mainly by species from the family Asteraceae. It has been demonstrated that SLs present anti-inflammatory, analgesic, antitumoral, antiparasitic, and antimicrobial activities. In this study, we aimed at evaluating the efficacy of the SL budlein A in a model of acute gout arthritis in mice. Methods: Experiments were conducted in male Swiss or male LysM-eGFP mice. Animals were treated with budlein A (1 or 10 mg/kg) or vehicle 30 min before stimulus with MSU (100 μg/10 μL, intra-articular). Knee joint withdrawal threshold and edema were evaluated using electronic von Frey and caliper, respectively, 1-15 h after MSU injection. Leukocyte recruitment was determined by counting cells (Neubauer chamber), H&E staining, and using LysM-eGFP mice by confocal microscopy. Inflammasome components, Il-1β, and Tnf-α mRNA expression were determined by RT-qPCR. IL-1β and TNF-α production (in vitro) and NF-κB activation (in vitro and in vivo) were evaluated by ELISA. In vitro analysis using LPS-primed bone marrow-derived macrophages (BMDMs) was performed 5 h after stimulation with MSU crystals. For these experiments, BMDMs were either treated or pre-treated with budlein A at concentrations of 1, 3, or 10 μg/mL. Results: We demonstrated that budlein A reduced mechanical hypersensitivity and knee joint edema. Moreover, it reduced neutrophil recruitment, phagocytosis of MSU crystals by neutrophils, and Il-1β and Tnf-α mRNA expression in the knee joint. In vitro, budlein A decreased TNF-α production, which might be related to the inhibition of NF-κB activation. Furthermore, budlein A also reduced the IL-1β maturation, possibly by targeting inflammasome assembly in macrophages. Conclusion: Budlein A reduced pain and inflammation in a model of acute gout arthritis in mice. Therefore, it is likely that molecules with the ability of targeting NF-κB activation and inflammasome assembly, such as budlein A, are interesting approaches to treat gout flares.
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Affiliation(s)
- Victor Fattori
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, Brazil
| | - Ana C Zarpelon
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, Brazil
| | - Larissa Staurengo-Ferrari
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, Brazil
| | - Sergio M Borghi
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, Brazil
| | - Tiago H Zaninelli
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, Brazil
| | - Fernando B Da Costa
- AsterBioChem Research Team, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Jose C Alves-Filho
- Laboratory of Inflammation and Pain, Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Thiago M Cunha
- Laboratory of Inflammation and Pain, Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Fernando Q Cunha
- Laboratory of Inflammation and Pain, Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Rubia Casagrande
- Department of Pharmaceutical Sciences, Center of Health Sciences, Londrina State University, Londrina, Brazil
| | - Nilton S Arakawa
- Department of Pharmaceutical Sciences, Center of Health Sciences, Londrina State University, Londrina, Brazil
| | - Waldiceu A Verri
- Laboratory of Pain, Inflammation, Neuropathy, and Cancer, Department of Pathology, Londrina State University, Londrina, Brazil
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12
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Mahon OR, Dunne A. Disease-Associated Particulates and Joint Inflammation; Mechanistic Insights and Potential Therapeutic Targets. Front Immunol 2018; 9:1145. [PMID: 29892292 PMCID: PMC5985611 DOI: 10.3389/fimmu.2018.01145] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 05/07/2018] [Indexed: 12/27/2022] Open
Abstract
It is now well established that intra-articular deposition of endogenous particulates, such as osteoarthritis-associated basic calcium phosphate crystals, gout-associated monosodium urate crystals, and calcium deposition disease-associated calcium pyrophosphate crystals, contributes to joint destruction through the production of cartilage-degrading enzymes and pro-inflammatory cytokines. Furthermore, exogenous wear-debris particles, generated from prosthetic implants, drive periprosthetic osteolysis which impacts on the longevity of total joint replacements. Over the last few years, significant insight has been gained into the mechanisms through which these particulates exert their effects. Not only has this increased our understanding of the pathological processes associated with crystal deposition but it has also led to the identification of a number of therapeutic targets to treat particulate-associated disease. In this review, we discuss recent developments regarding the cellular events triggered by joint-associated particulates, as well as future directions in therapy for particulate-related arthropathies.
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Affiliation(s)
- Olwyn R Mahon
- School of Biochemistry and Immunology, School of Medicine, Trinity College Dublin, Trinity Biomedical Sciences Institute, The University of Dublin, Dublin, Ireland
| | - Aisling Dunne
- School of Biochemistry and Immunology, School of Medicine, Trinity College Dublin, Trinity Biomedical Sciences Institute, The University of Dublin, Dublin, Ireland
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13
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Shu F, Shi Y. Systematic Overview of Solid Particles and Their Host Responses. Front Immunol 2018; 9:1157. [PMID: 29892295 PMCID: PMC5985299 DOI: 10.3389/fimmu.2018.01157] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 05/08/2018] [Indexed: 12/17/2022] Open
Abstract
Crystalline/particulate substances trigger a plethora of signaling events in host cells. The most prominent consequence is the inflammatory reactions that underlie crystal arthropathies, such as gout and pseudogout. However, their impact on our health was underestimated. Recent work on the role of cholesterol crystal in the development of atherosclerosis and the harm of environmental particulates has set up new frontiers in our defense against their detrimental effects. On the other hand, in the last 100 years, crystalline/particulate substances have been used with increasing frequencies in our daily lives as a part of new industrial manufacturing and engineering. Importantly, they have become a tool in modern medicine, used as vaccine adjuvants and drug delivery vehicles. Their biological effects are also being dissected in great detail, particularly with regard to their inflammatory signaling pathways. Solid structure interaction with host cells is far from being uniform, with outcomes dependent on cell types and chemical/physical properties of the particles involved. In this review, we offer a systematic and broad outlook of this landscape and a sage analysis of the complex nature of this topic.
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Affiliation(s)
- Fei Shu
- Department of Basic Medical Sciences, Institute for Immunology, Center for Life Sciences, Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, China
- Peking University-Tsinghua University-National Institute of Biological Sciences Joint Graduate Program, School of Life Sciences, Peking University, Beijing, China
| | - Yan Shi
- Department of Basic Medical Sciences, Institute for Immunology, Center for Life Sciences, Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, China
- Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute, University of Calgary, Calgary, AB, Canada
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14
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Giambelluca MS, Pouliot M. Early tyrosine phosphorylation events following adenosine A 2A receptor in human neutrophils: identification of regulated pathways. J Leukoc Biol 2017; 102:829-836. [PMID: 28179537 DOI: 10.1189/jlb.2vma1216-517r] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 01/16/2017] [Accepted: 01/23/2017] [Indexed: 12/30/2022] Open
Abstract
Activation of the adenosine 2A receptor (A2AR) elevates intracellular levels of cAMP and acts as a physiologic inhibitor of inflammatory neutrophil functions. In this study, we looked into the impact of A2AR engagement on early phosphorylation events. Neutrophils were stimulated with well-characterized proinflammatory agonists in the absence or presence of an A2AR agonist {3-[4-[2-[ [6-amino-9-[(2R,3R,4S,5S)-5-(ethylcarbamoyl)-3,4-dihydroxy-oxolan-2-yl]purin-2-yl]amino] ethyl] phenyl] propanoic acid (CGS 21680)}, PGE2, or a mixture of the compounds RO 20-1724 and forskolin. As assessed by immunoblotting, several proteins were tyrosine phosphorylated; CGS 21680 markedly decreased tyrosine phosphorylation levels of 4 regions (37-45, 50-55, 60, and 70 kDa). Key signaling protein kinases-p38 MAPK, Erk-1/2, PI3K/Akt, Hck, and Syk-showed decreased phosphorylation, whereas Lyn, SHIP-1, or phosphatase and tensin homolog (PTEN) was spared. PGE2 or the intracellular cAMP-elevating combination of RO 20-1724 and forskolin mostly mimicked the effect of CGS 21680. Together, results unveil intracellular signaling pathways targeted by the A2AR, some of which might be key in modulating neutrophil functions.
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Affiliation(s)
- Miriam S Giambelluca
- Department of Microbiology, Infectious Diseases and Immunology, Faculty of Medicine, Centre de Recherche du CHU de Québec-Université Laval, Quebec City, Canada
| | - Marc Pouliot
- Department of Microbiology, Infectious Diseases and Immunology, Faculty of Medicine, Centre de Recherche du CHU de Québec-Université Laval, Quebec City, Canada
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15
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Netea MG, van de Veerdonk FL, van der Meer JWM, Dinarello CA, Joosten LAB. Inflammasome-independent regulation of IL-1-family cytokines. Annu Rev Immunol 2014; 33:49-77. [PMID: 25493334 DOI: 10.1146/annurev-immunol-032414-112306] [Citation(s) in RCA: 250] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Induction, production, and release of proinflammatory cytokines are essential steps to establish an effective host defense. Cytokines of the interleukin-1 (IL-1) family induce inflammation and regulate T lymphocyte responses while also displaying homeostatic and metabolic activities. With the exception of the IL-1 receptor antagonist, all IL-1 family cytokines lack a signal peptide and require proteolytic processing into an active molecule. One such unique protease is caspase-1, which is activated by protein platforms called the inflammasomes. However, increasing evidence suggests that inflammasomes and caspase-1 are not the only mechanism for processing IL-1 cytokines. IL-1 cytokines are often released as precursors and require extracellular processing for activity. Here we review the inflammasome-independent enzymatic processes that are able to activate IL-1 cytokines, paying special attention to neutrophil-derived serine proteases, which subsequently induce inflammation and modulate host defense. The inflammasome-independent processing of IL-1 cytokines has important consequences for understanding inflammatory diseases, and it impacts the design of IL-1-based modulatory therapies.
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16
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Abstract
PURPOSE OF REVIEW Neutrophil cells have been considered mainly as innate immune cells directed against microbial threats. Their serine proteases neutrophil elastase, proteinase 3 and cathepsin G are main constituents and are released at sites of inflammation. During recent years it became clear that neutrophil serine proteases act as regulators of cell signaling and immune regulation. RECENT FINDINGS Neutrophils are able to form so-called neutrophil extracellular traps. Recent studies showed that these extracellular traps might be involved in small vessel vasculitis and lupus nephritis. Neutrophil serine proteases in concert with externalized nucleosomes promote thrombus formation inside blood vessels. This event helps retain bacteria inside liver microvessels and thereby prevents the extravasation of pathogens. Moreover, neutrophil serine proteases act as alternative processing enzymes of pro-inflammatory cytokines IL-1β and IL-18 in vivo and modulate other inflammation-related control mechanisms such as progranulin inactivation, matrix metalloproteinase-9 activation and IL-6 inactivation. Recent studies point to an involvement of neutrophil elastase in lung cancer by inducing mitogenesis after entering the cells. SUMMARY The knowledge of the different functions of neutrophils is still expanding. Recent findings underline the importance of neutrophil serine proteases as key mediators of inflammatory processes and point to novel strategies against inflammatory disorders.
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Activation of PI3K/Akt pathway by CD133-p85 interaction promotes tumorigenic capacity of glioma stem cells. Proc Natl Acad Sci U S A 2013; 110:6829-34. [PMID: 23569237 DOI: 10.1073/pnas.1217002110] [Citation(s) in RCA: 212] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The biological significance of a known normal and cancer stem cell marker CD133 remains elusive. We now demonstrate that the phosphorylation of tyrosine-828 residue in CD133 C-terminal cytoplasmic domain mediates direct interaction between CD133 and phosphoinositide 3-kinase (PI3K) 85 kDa regulatory subunit (p85), resulting in preferential activation of PI3K/protein kinase B (Akt) pathway in glioma stem cell (GSC) relative to matched nonstem cell. CD133 knockdown potently inhibits the activity of PI3K/Akt pathway with an accompanying reduction in the self-renewal and tumorigenicity of GSC. The inhibitory effects of CD133 knockdown could be completely rescued by expression of WT CD133, but not its p85-binding deficient Y828F mutant. Analysis of glioma samples reveals that CD133 Y828 phosphorylation level is correlated with histopathological grade and overlaps with Akt activation. Our results identify the CD133/PI3K/Akt signaling axis, exploring the fundamental role of CD133 in glioma stem cell behavior.
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18
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Neutrophils, IL-1β, and gout: is there a link? Semin Immunopathol 2013; 35:501-12. [DOI: 10.1007/s00281-013-0361-0] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2012] [Accepted: 01/09/2013] [Indexed: 01/09/2023]
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Välimäki E, Miettinen JJ, Lietzén N, Matikainen S, Nyman TA. Monosodium urate activates Src/Pyk2/PI3 kinase and cathepsin dependent unconventional protein secretion from human primary macrophages. Mol Cell Proteomics 2013; 12:749-63. [PMID: 23292187 DOI: 10.1074/mcp.m112.024661] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Monosodium urate (MSU) is an endogenous danger signal that is crystallized from uric acid released from injured cells. MSU is known to activate inflammatory response in macrophages but the molecular mechanisms involved have remained uncharacterized. Activated macrophages start to secrete proteins to activate immune response and to recruit other immune cells to the site of infection and/or tissue damage. Secretome characterization after activation of innate immune system is essential to unravel the details of early phases of defense responses. Here, we have analyzed the secretome of human primary macrophages stimulated with MSU using quantitative two-dimensional gel electrophoresis based proteomics as well as high-throughput qualitative GeLC-MS/MS approach combining protein separation by SDS-PAGE and protein identification by liquid chromatography-MS/MS. Both methods showed that MSU stimulation induced robust protein secretion from lipopolysaccharide-primed human macrophages. Bioinformatic analysis of the secretome data showed that MSU stimulation strongly activates unconventional, vesicle mediated protein secretion. The unconventionally secreted proteins included pro-inflammatory cytokines like IL-1β and IL-18, interferon-induced proteins, and danger signal proteins. Also active forms of lysosomal proteases cathepsins were secreted on MSU stimulation, and cathepsin activity was essential for MSU-induced unconventional protein secretion. Additionally, proteins associated to phosphorylation events including Src family tyrosine kinases were increased in the secretome of MSU-stimulated cells. Our functional studies demonstrated that Src, Pyk2, and PI3 kinases act upstream of cathepsins to activate the overall protein secretion from macrophages. In conclusion, we provide the first comprehensive characterization of protein secretion pathways activated by MSU in human macrophages, and reveal a novel role for cathepsins and Src, Pyk2, PI3 kinases in the activation of unconventional protein secretion.
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Affiliation(s)
- Elina Välimäki
- Institute of Biotechnology, University of Helsinki, University of Helsinki, Finland
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20
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Abstract
Significant scientific advances have been made over the last five years in the pathogenesis of hyperuricemia and understanding how monosodium urate (MSU) crystals provoke gout. New detection methods using ultrasound (US) have been evaluated and may become part of our routine diagnostic approach in a patient presenting with gout. This review will concentrate on the latest developments in the field, and discuss how these data may impact on clinical practice. Finally, a brief review of the therapeutic implications and new therapies that have become available will be presented.
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Affiliation(s)
- Alexander So
- Service de Rhumatologie, Département de l'Appareil Locomoteur, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
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21
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Malawista SE, de Boisfleury AC, Naccache PH. Inflammatory gout: observations over a half-century. FASEB J 2012; 25:4073-8. [PMID: 22131362 DOI: 10.1096/fj.11-1201ufm] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This is a discussion of acute gouty arthritis, seen for over 50 years of engagement. It addresses the evolution of our current understanding of the interaction between urate crystals and key cellular components of the gouty inflammatory paroxysm, with new material on pathogenesis.
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Affiliation(s)
- Stephen E Malawista
- Department of Internal Medicine, Yale University School of Medicine, P.O. Box 208031, 300 Cedar St., New Haven, CT 06520-8031, USA.
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23
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Mitroulis I, Kambas K, Chrysanthopoulou A, Skendros P, Apostolidou E, Kourtzelis I, Drosos GI, Boumpas DT, Ritis K. Neutrophil extracellular trap formation is associated with IL-1β and autophagy-related signaling in gout. PLoS One 2011; 6:e29318. [PMID: 22195044 PMCID: PMC3241704 DOI: 10.1371/journal.pone.0029318] [Citation(s) in RCA: 283] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2011] [Accepted: 11/24/2011] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Gout is a prevalent inflammatory arthritis affecting 1-2% of adults characterized by activation of innate immune cells by monosodium urate (MSU) crystals resulting in the secretion of interleukin-1β (IL-1β). Since neutrophils play a major role in gout we sought to determine whether their activation may involve the formation of proinflammatory neutrophil extracellular traps (NETs) in relation to autophagy and IL-1β. METHODOLOGY/PRINCIPAL FINDINGS Synovial fluid neutrophils from six patients with gout crisis and peripheral blood neutrophils from six patients with acute gout and six control subjects were isolated. MSU crystals, as well as synovial fluid or serum obtained from patients with acute gout, were used for the treatment of control neutrophils. NET formation was assessed using immunofluorescence microscopy. MSU crystals or synovial fluid or serum from patients induced NET formation in control neutrophils. Importantly, NET production was observed in neutrophils isolated from synovial fluid or peripheral blood from patients with acute gout. NETs contained the alarmin high mobility group box 1 (HMGB1) supporting their pro-inflammatory potential. Inhibition of phosphatidylinositol 3-kinase signaling or phagolysosomal fusion prevented NET formation, implicating autophagy in this process. NET formation was driven at least in part by IL-1β as demonstrated by experiments involving IL-1β and its inhibitor anakinra. CONCLUSIONS/SIGNIFICANCE These findings document for the first time that activation of neutrophils in gout is associated with the formation of proinflammatory NETs and links this process to both autophagy and IL-1β. Modulation of the autophagic machinery may represent an additional therapeutic study in crystalline arthritides.
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Affiliation(s)
- Ioannis Mitroulis
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Konstantinos Kambas
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Akrivi Chrysanthopoulou
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Panagiotis Skendros
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Eirini Apostolidou
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Ioannis Kourtzelis
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Georgios I. Drosos
- Department of Orthopaedic Surgery, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
| | - Dimitrios T. Boumpas
- Department of Rheumatology, Clinical Immunology and Allergy, University Hospital, Medical School, University of Crete, Heraklion, Greece
| | - Konstantinos Ritis
- First Department of Internal Medicine, Democritus University of Thrace, University General Hospital of Alexandroupolis, Alexandroupolis, Greece
- * E-mail:
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DCIR-mediated enhancement of HIV-1 infection requires the ITIM-associated signal transduction pathway. Blood 2011; 117:6589-99. [DOI: 10.1182/blood-2011-01-331363] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Dendritic cell immunoreceptor (DCIR) is a C-type lectin receptor expressed at high levels on dendritic cells (DCs). This surface molecule acts as an attachment factor for HIV-1 on DCs and contributes to trans- and cis-infection pathways. Moreover, DICR is induced by HIV-1 in CD4+ T cells and promotes virus replication in this cell type. Nothing is known hitherto about the DCIR-dependent signaling, which is induced following HIV-1 ligation. First, specific pharmacologic inhibitors were tested on HIV-1 binding/entry and, second, specific antisense oligonucleotides targeted, more specifically kinases and phosphatases, were used. Our results show that SHP-1, SHP-2, Syk, and Src kinases (ie, Src, Fyn, and Hck) as well as PKC-α and MAP kinases (ie, Erk1/2 and p38) are all involved in the DCIR-mediated signal transduction pathway triggered by HIV-1. By mutagenesis and through the use of intracellular phosphorylated peptides, we show as well a pivotal role for the tyrosine and threonine residues of the DCIR immunoreceptor tyrosine-based inhibitory motif (ITIM). Our data suggest for the first time an involvement of ITIM domain in HIV-1–mediated signaling events and a relationship between phosphorylation events and DCIR function with respect to HIV-1 biology.
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Kool M, Willart MAM, van Nimwegen M, Bergen I, Pouliot P, Virchow JC, Rogers N, Osorio F, Reis e Sousa C, Hammad H, Lambrecht BN. An unexpected role for uric acid as an inducer of T helper 2 cell immunity to inhaled antigens and inflammatory mediator of allergic asthma. Immunity 2011; 34:527-40. [PMID: 21474346 DOI: 10.1016/j.immuni.2011.03.015] [Citation(s) in RCA: 266] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Revised: 12/09/2010] [Accepted: 02/13/2011] [Indexed: 12/28/2022]
Abstract
Although deposition of uric acid (UA) crystals is known as the cause of gout, it is unclear whether UA plays a role in other inflammatory diseases. We here have shown that UA is released in the airways of allergen-challenged asthmatic patients and mice, where it was necessary for mounting T helper 2 (Th2) cell immunity, airway eosinophilia, and bronchial hyperreactivity to inhaled harmless proteins and clinically relevant house dust mite allergen. Conversely, administration of UA crystals together with protein antigen was sufficient to promote Th2 cell immunity and features of asthma. The adjuvant effects of UA did not require the inflammasome (Nlrp3, Pycard) or the interleukin-1 (Myd88, IL-1r) axis. UA crystals promoted Th2 cell immunity by activating dendritic cells through spleen tyrosine kinase and PI3-kinase δ signaling. These findings provide further molecular insight into Th2 cell development and identify UA as an essential initiator and amplifier of allergic inflammation.
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Affiliation(s)
- Mirjam Kool
- Laboratory of Immunoregulation and Mucosal Immunology, Department of Respiratory Diseases, University Ghent, Ghent 9000, Belgium
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Netea MG, Simon A, van de Veerdonk F, Kullberg BJ, Van der Meer JWM, Joosten LAB. IL-1beta processing in host defense: beyond the inflammasomes. PLoS Pathog 2010; 6:e1000661. [PMID: 20195505 PMCID: PMC2829053 DOI: 10.1371/journal.ppat.1000661] [Citation(s) in RCA: 386] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Stimulation and release of proinflammatory cytokines is an essential step for the activation of an effective innate host defense, and subsequently for the modulation of adaptive immune responses. Interleukin-1β (IL-1β) and IL-18 are important proinflammatory cytokines that on the one hand activate monocytes, macropages, and neutrophils, and on the other hand induce Th1 and Th17 adaptive cellular responses. They are secreted as inactive precursors, and the processing of pro-IL-1β and pro-IL-18 depends on cleavage by proteases. One of the most important of these enzymes is caspase-1, which in turn is activated by several protein platforms called the inflammasomes. Inflammasome activation differs in various cell types, and knock-out mice defective in either caspase-1 or inflammasome components have an increased susceptibility to several types of infections. However, in other infections and in models of sterile inflammation, caspase-1 seems to be less important, and alternative mechanisms such as neutrophil-derived serine proteases or proteases released from microbial pathogens can process and activate IL-1β. In conclusion, IL-1β/IL-18 processing during infection is a complex process in which the inflammasomes are only one of several activation mechanisms.
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Affiliation(s)
- Mihai G Netea
- Department of Medicine, Radboud University Nijmegen Medical Center, and Nijmegen Center for Infections, Inflammation and Immunity (N4i), Nijmegen, The Netherlands.
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Affiliation(s)
- Oana Popa‐Nita
- Centre de Recherche en Rhumatologie et Immunologie du Centre de Recherche du CHUL‐CHUQ, Department of Microbiology and Immunology, Faculty of Medicine, Laval University Québec Canada
| | - Paul H Naccache
- Centre de Recherche en Rhumatologie et Immunologie du Centre de Recherche du CHUL‐CHUQ, Department of Microbiology and Immunology, Faculty of Medicine, Laval University Québec Canada
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Tiemi Shio M, Eisenbarth SC, Savaria M, Vinet AF, Bellemare MJ, Harder KW, Sutterwala FS, Bohle DS, Descoteaux A, Flavell RA, Olivier M. Malarial hemozoin activates the NLRP3 inflammasome through Lyn and Syk kinases. PLoS Pathog 2009; 5:e1000559. [PMID: 19696895 PMCID: PMC2722371 DOI: 10.1371/journal.ppat.1000559] [Citation(s) in RCA: 241] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2009] [Accepted: 07/27/2009] [Indexed: 12/29/2022] Open
Abstract
The intraerythrocytic parasite Plasmodium—the causative agent of malaria—produces an inorganic crystal called hemozoin (Hz) during the heme detoxification process, which is released into the circulation during erythrocyte lysis. Hz is rapidly ingested by phagocytes and induces the production of several pro-inflammatory mediators such as interleukin-1β (IL-1β). However, the mechanism regulating Hz recognition and IL-1β maturation has not been identified. Here, we show that Hz induces IL-1β production. Using knockout mice, we showed that Hz-induced IL-1β and inflammation are dependent on NOD-like receptor containing pyrin domain 3 (NLRP3), ASC and caspase-1, but not NLRC4 (NLR containing CARD domain). Furthermore, the absence of NLRP3 or IL-1β augmented survival to malaria caused by P. chabaudi adami DS. Although much has been discovered regarding the NLRP3 inflammasome induction, the mechanism whereby this intracellular multimolecular complex is activated remains unclear. We further demonstrate, using pharmacological and genetic intervention, that the tyrosine kinases Syk and Lyn play a critical role in activation of this inflammasome. These findings not only identify one way by which the immune system is alerted to malarial infection but also are one of the first to suggest a role for tyrosine kinase signaling pathways in regulation of the NLRP3 inflammasome. Malaria is widespread in the tropical and sub-tropical regions of the world, and is responsible for 2–3 million deaths annually. This disease is caused by parasites of the Plasmodium genus. The parasite feeds on the hemoglobin of red blood cells and generates a metabolic waste called hemozoin (Hz). Hz is released into the blood circulation during the rupture of red blood cells, which coincides with the production of many cytokines such as interleukin-1β (IL-1β), responsible in part for the periodic fever that is characteristic of the malaria disease. Here, we investigated how Hz activates macrophages (cells that engulf foreign material) to produce IL-1β. We found that Hz is taken up by macrophages initiating signals such as the tyrosine kinases Syk and Lyn that communicate to intracellular receptors. We also showed that Hz-induced IL-1β production is dependent on activation of the intracellular receptor NLRP3, the adaptor protein ASC and a protease called caspase-1 that cleaves IL-1β, therefore allowing it to be released from the cells. These findings not only identify one way in which the immune system is alerted to malarial infection but also dissect some of the signaling events triggered by Hz in the NLRP3 inflammasome pathway.
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Affiliation(s)
- Marina Tiemi Shio
- Department of Medicine, Microbiology and Immunology, Centre for the Study of Host Resistance, The Research Institute of the McGill University Health Centre, Montréal, Quebec, Canada
| | - Stephanie C. Eisenbarth
- Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, United States of America
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Myriam Savaria
- Department of Medicine, Microbiology and Immunology, Centre for the Study of Host Resistance, The Research Institute of the McGill University Health Centre, Montréal, Quebec, Canada
| | - Adrien F. Vinet
- Institut National de la Recherche Scientifique-Institut Armand-Frappier, Laval, Quebec, Canada
| | - Marie-Josée Bellemare
- Department of Medicine, Microbiology and Immunology, Centre for the Study of Host Resistance, The Research Institute of the McGill University Health Centre, Montréal, Quebec, Canada
- Department of Chemistry, McGill University, Montréal, Quebec, Canada
| | - Kenneth W. Harder
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, Canada
| | - Fayyaz S. Sutterwala
- Inflammation Program, Department of Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - D. Scott Bohle
- Department of Chemistry, McGill University, Montréal, Quebec, Canada
| | - Albert Descoteaux
- Institut National de la Recherche Scientifique-Institut Armand-Frappier, Laval, Quebec, Canada
| | - Richard A. Flavell
- Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, United States of America
- Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Martin Olivier
- Department of Medicine, Microbiology and Immunology, Centre for the Study of Host Resistance, The Research Institute of the McGill University Health Centre, Montréal, Quebec, Canada
- * E-mail:
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Popa-Nita O, Proulx S, Paré G, Rollet-Labelle E, Naccache PH. Crystal-induced neutrophil activation: XI. Implication and novel roles of classical protein kinase C. THE JOURNAL OF IMMUNOLOGY 2009; 183:2104-14. [PMID: 19596988 DOI: 10.4049/jimmunol.0900906] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Monosodium urate (MSU) crystals are among the most potent proinflammatory stimuli, and an innate immune inflammatory response to the crystal surface is involved in the pathology of gouty arthritis. Furthermore, MSU crystals have recently been identified as danger signals able to induce the maturation of dendritic cells. Release of the crystals into the joint cavity promotes an acute inflammation characterized by a massive infiltration of neutrophils that leads to tissue damage. Protein kinase C (PKC) represents a family of serine/threonine kinases that play central signaling roles in multiple cellular responses. This family of kinases is divided into three subfamilies based on second messenger requirements: conventional (or classical), novel, and atypical. Despite their role in signal transduction, very little is known about the involvement of the PKC family in the inflammatory reaction induced by MSU crystals. In the present study, we show that MSU crystals activate conventional PKC isoforms, and that this activation is necessary for the MSU crystal-induced degranulation and generation of a chemotactic activity in the supernatants of MSU crystal-stimulated human neutrophils. Evidence is also obtained that the tyrosine kinase Syk is a substrate of PKC and that the PKC-mediated serine phosphorylation of Syk is necessary to its interaction with the regulatory subunit of PI3K kinases (p85) and thus to the subsequent activation of these lipid kinases. These results suggest novel means of modulating neutrophil responses (through the specific regulation of PKC) during the acute phase of MSU crystal-induced inflammation.
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Affiliation(s)
- Oana Popa-Nita
- Department of Medicine, Faculty of Medicine, Centre de Recherche en Rhumatologie et Immunologie, Université Laval, Quebec City, Quebec, Canada
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Geahlen RL. Syk and pTyr'd: Signaling through the B cell antigen receptor. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2009; 1793:1115-27. [PMID: 19306898 DOI: 10.1016/j.bbamcr.2009.03.004] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Accepted: 03/06/2009] [Indexed: 11/18/2022]
Abstract
The B cell receptor (BCR) transduces antigen binding into alterations in the activity of intracellular signaling pathways through its ability to recruit and activate the cytoplasmic protein-tyrosine kinase Syk. The recruitment of Syk to the receptor, its activation and its subsequent interactions with downstream effectors are all regulated by its phosphorylation on tyrosine. This review discusses our current understanding of how this phosphorylation regulates the activity of Syk and its participation in signaling through the BCR.
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Affiliation(s)
- Robert L Geahlen
- Department of Medicinal Chemistry and Molecular Pharmacology, Purdue University, West Lafayette, IN 47907, USA.
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Mechanism of action of clinically approved adjuvants. Curr Opin Immunol 2009; 21:23-9. [DOI: 10.1016/j.coi.2009.01.004] [Citation(s) in RCA: 261] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2008] [Accepted: 01/20/2009] [Indexed: 12/27/2022]
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Popa-Nita O, Marois L, Paré G, Naccache PH. Crystal-induced neutrophil activation: X. Proinflammatory role of the tyrosine kinase Tec. ACTA ACUST UNITED AC 2008; 58:1866-76. [PMID: 18512796 DOI: 10.1002/art.23801] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Monosodium urate monohydrate (MSU) crystals are among the most potent proinflammatory stimuli, and an innate immune inflammatory response to the crystal surface is involved in the pathogenesis of gouty arthritis. Release of the crystals into the joint cavity promotes an acute inflammation characterized by massive infiltration of neutrophils, which leads to tissue damage. The aim of the present study was to assess the involvement of the tyrosine kinase Tec in MSU crystal-initiated transduction events in human neutrophils. METHODS Immunoprecipitation and immunoblotting techniques were used for the cellular signaling studies. Chemotaxis and enzyme-linked immunosorbent assay techniques were used for the functional studies. Silencing of Tec expression using specific small interfering RNA was also performed. RESULTS MSU crystals induced the phosphorylation and activation of Tec in a Src-dependent manner. This activation was necessary for the MSU crystal-induced secretion of interleukin-1beta (IL-1beta) and IL-8 and for the generation of chemotactic activity in supernatants of MSU crystal-stimulated neutrophils. In addition, colchicine, an effective drug for the treatment of gout, inhibited the MSU crystal-induced tyrosine phosphorylation of Tec, thus modulating its kinase activity. CONCLUSION Our findings show that Tec is the principal kinase of the Tec family that plays a major role in the responses of human neutrophils to MSU crystals, which are likely to be involved in the initiation and perpetuation of gout. Our results suggest that the specific inhibition of Tec during the acute phase of MSU crystal-induced inflammation may be considered for the treatment of gouty arthritis.
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Schymeinsky J, Then C, Sindrilaru A, Gerstl R, Jakus Z, Tybulewicz VLJ, Scharffetter-Kochanek K, Walzog B. Syk-mediated translocation of PI3Kdelta to the leading edge controls lamellipodium formation and migration of leukocytes. PLoS One 2007; 2:e1132. [PMID: 17987119 PMCID: PMC2063580 DOI: 10.1371/journal.pone.0001132] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2007] [Accepted: 10/10/2007] [Indexed: 12/19/2022] Open
Abstract
The non-receptor tyrosine kinase Syk is mainly expressed in the hematopoietic system and plays an essential role in beta(2) integrin-mediated leukocyte activation. To elucidate the signaling pathway downstream of Syk during beta2 integrin (CD11/CD18)-mediated migration and extravasation of polymorphonuclear neutrophils (PMN), we generated neutrophil-like differentiated HL-60 (dHL-60) cells expressing a fluorescently tagged Syk mutant lacking the tyrosine residue at the position 323 (Syk-Tyr323) that is known to be required for the binding of the regulatory subunit p85 of the phosphatidylinositol 3-kinase (PI3K) class I(A). Syk-Tyr323 was found to be critical for the enrichment of the catalytic subunit p110delta of PI3K class I(A) as well as for the generation of PI3K products at the leading edge of the majority of polarized cells. In accordance, the translocation of PI3K p110delta to the leading edge was diminished in Syk deficient murine PMN. Moreover, the expression of EGFP-Syk Y323F interfered with proper cell polarization and it impaired efficient migration of dHL-60 cells. In agreement with a major role of beta2 integrins in the recruitment of phagocytic cells to sites of lesion, mice with a Syk-deficient hematopoietic system demonstrated impaired PMN infiltration into the wounded tissue that was associated with prolonged cutaneous wound healing. These data imply a novel role of Syk via PI3K p110delta signaling for beta2 integrin-mediated migration which is a prerequisite for efficient PMN recruitment in vivo.
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Affiliation(s)
- Jürgen Schymeinsky
- Department of Physiology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Cornelia Then
- Department of Physiology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Anca Sindrilaru
- Department of Dermatology and Allergic Diseases, University of Ulm, Ulm, Germany
| | - Ronald Gerstl
- Department of Physiology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Zoltán Jakus
- Department of Physiology, Semmelweis University School of Medicine, Budapest, Hungary
| | - Victor L. J. Tybulewicz
- Division of Immune Cell Biology, National Institute for Medical Research, London, United Kingdom
| | | | - Barbara Walzog
- Department of Physiology, Ludwig-Maximilians-University Munich, Munich, Germany
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