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Boucher J, Gilbert C, Bose S, Tessier PA. S100A9: The Unusual Suspect Connecting Viral Infection and Inflammation. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:1523-1529. [PMID: 38709994 PMCID: PMC11076006 DOI: 10.4049/jimmunol.2300640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 01/20/2024] [Indexed: 05/08/2024]
Abstract
The study of S100A9 in viral infections has seen increased interest since the COVID-19 pandemic. S100A8/A9 levels were found to be correlated with the severity of COVID-19 disease, cytokine storm, and changes in myeloid cell subsets. These data led to the hypothesis that S100A8/A9 proteins might play an active role in COVID-19 pathogenesis. This review explores the structures and functions of S100A8/9 and the current knowledge on the involvement of S100A8/A9 and its constituents in viral infections. The potential roles of S100A9 in SARS-CoV-2 infections are also discussed.
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Affiliation(s)
- Julien Boucher
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, and Département de microbiologie-infectiologie et d’immunologie, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
| | - Caroline Gilbert
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, and Département de microbiologie-infectiologie et d’immunologie, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
| | - Santanu Bose
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA 99164, USA
| | - Philippe A. Tessier
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, and Département de microbiologie-infectiologie et d’immunologie, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
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Weng Q, Jiang T, Zhang W, Doherty M, Yang Z, Wei J. Associations between hyperuricemia and ultrasound-detected knee synovial abnormalities in middle-aged and older population: a cross-sectional study. J Orthop Surg Res 2024; 19:226. [PMID: 38575963 PMCID: PMC10996165 DOI: 10.1186/s13018-024-04708-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Accepted: 04/01/2024] [Indexed: 04/06/2024] Open
Abstract
OBJECTIVES Knee synovial abnormalities, potentially treatment targets for knee pain and osteoarthritis, are common in middle-aged and older population, but its etiology remains unclear. We examined the associations between hyperuricemia and knee synovial abnormalities detected by ultrasound in a general population sample. METHODS Participants aged ≥ 50 years were from a community-based observational study. Hyperuricemia was defined as serum urate (SU) level > 416 µmol/L in men and > 357 µmol/L in women. Ultrasound of both knees was performed to determine the presence of synovial abnormalities, i.e., synovial hypertrophy, effusion, or Power Doppler signal (PDS). We examined the relation of hyperuricemia to prevalence of knee synovial abnormalities and its laterality, and the dose-response relationships between SU levels and the prevalence of knee synovial abnormalities. RESULTS In total, 3,405 participants were included in the analysis. Hyperuricemia was associated with higher prevalence of knee synovial abnormality (adjusted odds ratio [aOR] = 1.21, 95% confidence interval [CI]: 1.02 to 1.43), synovial hypertrophy (aOR = 1.33, 95% CI: 1.05 to 1.68), and effusion (aOR = 1.21, 95% CI: 1.02 to 1.44), respectively. There were dose-response relationships between SU levels and synovial abnormalities. Additionally, the hyperuricemia was more associated with prevalence of bilateral than with that of unilateral knee synovial abnormality, synovial hypertrophy, or effusion; however, no significant association was observed between hyperuricemia and PDS. CONCLUSION In this population-based study we found that hyperuricemia was associated with higher prevalence of knee synovial abnormality, synovial hypertrophy and effusion, suggesting that hyperuricemia may play a role in pathogenesis of knee synovial abnormalities.
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Affiliation(s)
- Qianlin Weng
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Ting Jiang
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
- Department of Ultrasonography, Xiangya Hospital, Central South University, Changsha, China
- Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham, UK
- Pain Centre Versus Arthritis UK, University of Nottingham, Nottingham, UK
| | - Weiya Zhang
- Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham, UK
- Pain Centre Versus Arthritis UK, University of Nottingham, Nottingham, UK
| | - Michael Doherty
- Academic Rheumatology, School of Medicine, University of Nottingham, Nottingham, UK
- Pain Centre Versus Arthritis UK, University of Nottingham, Nottingham, UK
| | - Zidan Yang
- Key Laboratory of Aging-related Bone and Joint Diseases Prevention and Treatment, Ministry of Education, Xiangya Hospital, Central South University, Changsha, China.
- Hunan Key Laboratory of Joint Degeneration and Injury, Xiangya Hospital, Central South University, Changsha, China.
| | - Jie Wei
- Department of Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Aging-related Bone and Joint Diseases Prevention and Treatment, Ministry of Education, Xiangya Hospital, Central South University, Changsha, China
- Hunan Key Laboratory of Joint Degeneration and Injury, Xiangya Hospital, Central South University, Changsha, China
- Department of Epidemiology and Health Statistics, Xiangya School of Public Health, Central South University, Changsha, China
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Jiang T, Weng Q, Zhang Y, Zhang W, Doherty M, Sarmanova A, Yang Z, Yang T, Li J, Liu K, Wang Y, Obotiba AD, Zeng C, Lei G, Wei J. Association Between Hyperuricemia and Ultrasound-Detected Hand Synovitis. Arthritis Care Res (Hoboken) 2024. [PMID: 38570913 DOI: 10.1002/acr.25342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 02/15/2024] [Accepted: 04/02/2024] [Indexed: 04/05/2024]
Abstract
OBJECTIVE Although hand synovitis is prevalent in the older population, the etiology remains unclear. Hyperuricemia, a modifiable metabolic disorder, may serve as an underlying mechanism of hand synovitis, but little is known about their relationship. We assessed the association between hyperuricemia and hand synovitis in a large population-based sample. METHODS We performed a cross-sectional study in Longshan County, Hunan Province, China. Hyperuricemia was defined as a serum urate level >420 μmol/L in men and >360 μmol/L in women. Ultrasound examinations were performed on both hands of 4,080 participants, and both gray-scale synovitis and the Power Doppler signal (PDS) were assessed using semiquantitative scores (grades 0-3). We evaluated the association of hyperuricemia with hand gray-scale synovitis (grade ≥2) and PDS (grade ≥1), respectively, adjusting for age, sex, and body mass index. RESULTS All required assessments for analysis were available for 3,286 participants. The prevalence of hand gray-scale synovitis was higher among participants with hyperuricemia (30.0%) than those with normouricemia (23.3%), with an adjusted odds ratio (aOR) of 1.28 (95% confidence interval [CI] 1.00-1.62). Participants with hyperuricemia also had a higher prevalence of PDS (aOR 2.36; 95% CI 1.15-4.81). Furthermore, hyperuricemia positively associated, both at the hand and joint levels, with the presence of gray-scale synovitis (aOR 1.27; 95% CI 1.00-1.60 and adjusted prevalence ratio [aPR] 1.26; 95% CI 1.10-1.44, respectively) and PDS (aOR 2.35; 95% CI 1.15-4.79 and aPR 2.34; 95% CI 1.28-4.30, respectively). CONCLUSION This population-based study provides more evidence for a positive association between hyperuricemia and prevalent hand synovitis.
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Affiliation(s)
- Ting Jiang
- Xiangya Hospital, Central South University, Changsha, China, the University of Nottingham, and Pain Centre Versus Arthritis UK, Nottingtham, United Kingdom
| | - Qianlin Weng
- Xiangya Hospital, Central South University, Changsha, China
| | - Yuqing Zhang
- Massachusetts General Hospital, Harvard Medical School, Boston
| | - Weiya Zhang
- University of Nottingham and Pain Centre Versus Arthritis UK, Nottingham, United Kingdom
| | - Michael Doherty
- University of Nottingham and Pain Centre Versus Arthritis UK, Nottingham, United Kingdom
| | | | - Zidan Yang
- Xiangya Hospital, Central South University, Changsha, China
| | - Tuo Yang
- Xiangya Hospital, Central South University, Changsha, China, the University of Nottingham, and Pain Centre Versus Arthritis UK, Nottingtham, United Kingdom
| | - Jiatian Li
- Xiangya Hospital, Central South University, Changsha, China
| | - Ke Liu
- Xiangya Hospital, Central South University, Changsha, China
| | - Yuqing Wang
- Xiangya Hospital, Central South University, Changsha, China
| | | | - Chao Zeng
- Xiangya Hospital, Central South University, Changsha, China
| | - Guanghua Lei
- Xiangya Hospital, Central South University, Changsha, China
| | - Jie Wei
- Xiangya Hospital, Central South University, and Xiangya School of Public Health, Central South University, Changsha, China
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Wang Q, Long G, Luo H, Zhu X, Han Y, Shang Y, Zhang D, Gong R. S100A8/A9: An emerging player in sepsis and sepsis-induced organ injury. Biomed Pharmacother 2023; 168:115674. [PMID: 37812889 DOI: 10.1016/j.biopha.2023.115674] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/04/2023] [Accepted: 10/06/2023] [Indexed: 10/11/2023] Open
Abstract
Sepsis, the foremost contributor to mortality in intensive care unit patients, arises from an uncontrolled systemic response to invading infections, resulting in extensive harm across multiple organs and systems. Recently, S100A8/A9 has emerged as a promising biomarker for sepsis and sepsis-induced organ injury, and targeting S100A8/A9 appeared to ameliorate inflammation-induced tissue damage and improve adverse outcomes. S100A8/A9, a calcium-binding heterodimer mainly found in neutrophils and monocytes, serves as a causative molecule with pro-inflammatory and immunosuppressive properties, which are vital in the pathogenesis of sepsis. Therefore, improving our comprehension of how S100A8/A9 acts as a pathological player in the development of sepsis is imperative for advancing research on sepsis. Our review is the first-to the best of our knowledge-to discuss the biology of S100A8/A9 and its release mechanisms, summarize recent advances concerning the vital roles of S100A8/A9 in sepsis and the consequential organ damage, and underscore its potential as a promising diagnostic biomarker and therapeutic target for sepsis.
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Affiliation(s)
- Qian Wang
- Wuhan Jinyintan Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan 430023, China
| | - Gangyu Long
- Wuhan Jinyintan Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan 430023, China
| | - Hong Luo
- Wuhan Jinyintan Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan 430023, China
| | - Xiqun Zhu
- Hubei Cancer Hospital, Tongji Medical College, HUST, Wuhan 430079, China
| | - Yang Han
- Center for Translational Medicine, Wuhan Jinyintan Hospital, Wuhan 430023, China
| | - You Shang
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, HUST, Wuhan 430030, China.
| | - Dingyu Zhang
- Wuhan Jinyintan Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan 430023, China; Hubei Clinical Research Center for Infectious Diseases, Wuhan 430023, China; Wuhan Research Center for Communicable Disease Diagnosis and Treatment, Chinese Academy of Medical Sciences, Wuhan 430023, China; Joint Laboratory of Infectious Diseases and Health, Wuhan Institute of Virology and Wuhan Jinyintan Hospital, Chinese Academy of Sciences, Wuhan 430023, China.
| | - Rui Gong
- The First Affiliated Hospital of University of Science and Technology of China (USTC), Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China.
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Boucher J, Rousseau A, Boucher C, Subra C, Bazié WW, Hubert A, Bourgeault E, Benmoussa A, Goyer B, Tessier PA, Gilbert C. Immune Cells Release MicroRNA-155 Enriched Extracellular Vesicles That Promote HIV-1 Infection. Cells 2023; 12:cells12030466. [PMID: 36766808 PMCID: PMC9914104 DOI: 10.3390/cells12030466] [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: 11/26/2022] [Revised: 01/21/2023] [Accepted: 01/25/2023] [Indexed: 02/04/2023] Open
Abstract
The hallmark of HIV-1 infection is the rapid dysregulation of immune functions. Recent investigations for biomarkers of such dysregulation in people living with HIV (PLWH) reveal a strong correlation between viral rebound and immune activation with an increased abundance of extracellular vesicles (EVs) enriched with microRNA-155. We propose that the activation of peripheral blood mononuclear cells (PBMCs) leads to an increased miR-155 expression and production of miR-155-rich extracellular vesicles (miR-155-rich EVs), which can exacerbate HIV-1 infection by promoting viral replication. PBMCs were incubated with either HIV-1 (NL4.3Balenv), a TLR-7/8 agonist, or TNF. EVs were harvested from the cell culture supernatant by differential centrifugation, and RT-qPCR quantified miR-155 in cells and derived EVs. The effect of miR-155-rich EVs on replication of HIV-1 in incubated PBMCs was then measured by viral RNA and DNA quantification. HIV-1, TLR7/8 agonist, and TNF each induced the release of miR-155-rich EVs by PBMCs. These miR-155-rich EVs increased viral replication in PBMCs infected in vitro. Infection with HIV-1 and inflammation promote the production of miR-155-rich EVs, enhancing viral replication. Such autocrine loops, therefore, could influence the course of HIV-1 infection by promoting viral replication.
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Affiliation(s)
- Julien Boucher
- Axe de Recherche Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Alyssa Rousseau
- Axe de Recherche Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Catherine Boucher
- Axe de Recherche Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Caroline Subra
- U.S. Military HIV Research Program, Silver Spring, MD 20910, USA
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA
- Walter Reed Army Institute of Research, 503 Robert Grant Avenue, Silver Spring, MD 20910, USA
| | - Wilfried W. Bazié
- Axe de Recherche Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
- Programme de Recherche sur les Maladies Infectieuses, Centre Muraz, Institut National de Santé Publique, Bobo-Dioulasso 01 BP 390, Burkina Faso
| | - Audrey Hubert
- Axe de Recherche Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Emma Bourgeault
- Axe de Recherche Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Abderrahim Benmoussa
- Axe de Recherche Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Benjamin Goyer
- Axe de Recherche Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Philippe A. Tessier
- Axe de Recherche Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
- Département de Microbiologie-Infectiologie et d’Immunologie, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
| | - Caroline Gilbert
- Axe de Recherche Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
- Département de Microbiologie-Infectiologie et d’Immunologie, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
- Correspondence: ; Tel.: +1-418-525-4444 (ext. 46107); Fax: +1-418-654-2765
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Tanshinone IIA Improves Acute Gouty Arthritis in Rats through Regulating Neutrophil Activation and the NLRP3 Inflammasome. DISEASE MARKERS 2022; 2022:5851412. [PMID: 36578443 PMCID: PMC9792249 DOI: 10.1155/2022/5851412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/13/2022] [Accepted: 12/07/2022] [Indexed: 12/24/2022]
Abstract
Objectives To investigate the prevention and treatment effect of tanshinone IIA (TIIA) on acute gouty arthritis (AGA) and its mechanism. Methods The anti-AGA effect of TIIA was observed in vivo and in vitro. Neutrophils were isolated from the abdominal cavity of mice, and the anti-AGA effect of TIIA was investigated in a rat model of MSU-induced AGA. The pathological changes of the ankle joint tissues were assessed by H&E. Cytokine and chemokine expression were determined by ELISA and RT-qPCR. The NLRP3 inflammasome pathway protein levels in the ankle joint tissues were evaluated via western blotting. Neutrophil migration was evaluated in air pouch and transwell assays. Immunohistochemistry and immunofluorescence analysis evaluate the release of myeloperoxidase (MPO), neutrophil elastase (NE), and citrullination of histone H3 (CitH3). Beclin-1 and LC3B expressions were determined using western blotting and immunofluorescence. Key Findings. Treatment with TIIA alleviated synovial hyperplasia and neutrophil infiltration, regulated cytokine and chemokine expressions, and inhibited NLRP3 activation in AGA rats, neutrophil migration, MPO, NE, and CitH3 expression, and LC3B and Beclin-1 protein expression. Conclusions These results demonstrate that TIIA can effectively enhance AGA by focusing on the neutrophils and NLRP3 inflammasome, demonstrating that TIIA may act as a potential helpful agent for AGA.
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Hammer HB, Rollefstad S, Semb AG, Jensen G, Karoliussen LF, Terslev L, Haavardsholm EA, Kvien TK, Uhlig T. Urate crystal deposition is associated with inflammatory markers and carotid artery pathology in patients with intercritical gout: results from the NOR-Gout study. RMD Open 2022; 8:rmdopen-2022-002348. [PMID: 35863863 PMCID: PMC9310249 DOI: 10.1136/rmdopen-2022-002348] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 06/29/2022] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND Gout is of unknown reason associated with cardiovascular disease. Ultrasound is sensitive for detecting crystal deposition and plasma calprotectin is a sensitive inflammatory marker. This study explores the associations between crystal deposition, inflammation and carotid artery pathology. METHOD A cross-sectional analysis of baseline assessments from the NOR-Gout study was undertaken. Crystal deposition was assessed by ultrasound (double contour, tophi, aggregates) and dual-energy CT (DECT) and laboratory assessments included plasma calprotectin. The carotid arteries were bilaterally examined for carotid intima-media thickness (cIMT) and presence of plaques. Spearman correlations, Mann-Whitney tests and linear regression analyses were used to explore associations between crystal deposition, inflammatory markers,and carotid pathology. RESULTS 202 patients with intercritical gout (95.5% men, mean (SD) age 56.5 (13.8) years, disease duration 7.9 (7.7) years) were included. Calprotectin was correlated with all scores of crystal deposition by ultrasound (r=0.26-0.32, p<0.001) and DECT (r=0.15, p<0.05). cIMT was correlated with sum score aggregates (r=0.18-0.22, p<0.05). Patients with large tophi had higher levels of calprotectin as well as more frequent carotid plaque (p<0.05). CONCLUSIONS Study findings point towards crystal deposition contributing to subclinical inflammation with subsequent vascular implications. However, future longitudinal studies are needed to confirm such causal relationships.
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Affiliation(s)
- Hilde Berner Hammer
- Dept of Rheumatology, Diakonhjemmet Hospital, Oslo, Norway .,Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Silvia Rollefstad
- Peventive Cardio-Rheuma clinic, Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Anne Grete Semb
- Peventive Cardio-Rheuma clinic, Division of Rheumatology and Research, Diakonhjemmet Hospital, Oslo, Norway
| | - Gro Jensen
- Clinical chemical laboratory, Diakonhjemmet Hospital, Oslo, Norway
| | | | - L Terslev
- Center for Rheumatology and Spine Diseases, Rigshospitalet, Kobenhavn, Denmark
| | - Espen A Haavardsholm
- Dept of Rheumatology, Diakonhjemmet Hospital, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Tore K Kvien
- Dept of Rheumatology, Diakonhjemmet Hospital, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Till Uhlig
- Dept of Rheumatology, Diakonhjemmet Hospital, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
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Lin L, Zhao Y, Li Z, Li Y, Wang W, Kang J, Wang Q. Expression of S100A9 and KL-6 in common interstitial lung diseases. Medicine (Baltimore) 2022; 101:e29198. [PMID: 35512076 PMCID: PMC9276110 DOI: 10.1097/md.0000000000029198] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 03/10/2022] [Indexed: 01/04/2023] Open
Abstract
By evaluating S100 calcium binding protein A9 (S100A9) and Klebs von den Lungen-6 (KL-6) expression in patients with 4 common interstitial lung diseases (ILDs), we aimed to investigate whether S100A9 or KL-6 can be of any value in the differential diagnosis of these ILDs and simultaneously signal the disease progression.We collected the data of patients diagnosed with the 4 ILDs and underwent fiber-optic bronchoscopy and BAL in the First Affiliated Hospital, China Medical University from January 2012 to December 2020. The data related to BGA, C-reactive protein, pulmonary function test, total number and fraction of cells, T lymphocyte subsets in bronchoalveolar lavage fluid (BALF), and the expression of S100A9 and KL-6 in BALF and serum were collected. We analyzed, whether S100A9 or KL-6 could serve as a biomarker for differential diagnosis between the 4 common ILDs; whether the levels of S100A9 and KL-6 correlated with each other; whether they were correlated with other clinical parameters and disease severity.This study included 98 patients, 37 patients with idiopathic pulmonary fibrosis (IPF), 12 with hypersensitivity pneumonitis, 13 with connective tissue disease-associated ILD, and 36 with sarcoidosis (SAR): stage I (18), stage II (9), stage III (5), and stage IV (4). The expression of KL-6 in BALF was significantly higher in IPF patients than other 3 groups (all P-value < .05). However, there was no significant difference in the levels of S100A9 in BALF and serum between the 4 groups (P-value > .05). The levels of S100A9 in BALF of IPF patients was positively and significantly correlated with KL-6 expression and the percentage of neutrophils in BALF (P-value < .05). Along with the stage increase of SAR patients, the level of S100A9 in BALF gradually increased, which was negatively and significantly correlated with the forced vital capacity/predicted, carbon monoxide diffusing capacity/predicted%, and PaO2 (all P-value < .05).The expression of KL-6 in BALF can be used as a biomarker to differentiate IPF from the other 3 common ILDs. While, this was not the case with expression of S100A9 in BALF and serum. However, the expression S100A9 in BALF is useful to indicate the progression of SAR. Thus, simultaneous measurement of KL-6 and S100A9 levels in BALF makes more sense in differential diagnosing of the 4 common ILDS.
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Affiliation(s)
- Li Lin
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Disease, The First Hospital of China Medical University, Shenyang, China
| | - Yabin Zhao
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Disease, The First Hospital of China Medical University, Shenyang, China
| | - Zhenhua Li
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Disease, The First Hospital of China Medical University, Shenyang, China
| | - Yun Li
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Disease, The First Hospital of China Medical University, Shenyang, China
- Department of Geriatric Respiratory, The First Hospital of Kunming Medical University, Kunming, China
| | - Wei Wang
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Disease, The First Hospital of China Medical University, Shenyang, China
| | - Jian Kang
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Disease, The First Hospital of China Medical University, Shenyang, China
| | - Qiuyue Wang
- Department of Pulmonary and Critical Care Medicine, Institute of Respiratory Disease, The First Hospital of China Medical University, Shenyang, China
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Sanapalli BKR, Yele V, Baldaniya L, Karri VVSR. Identification of novel protein kinase C-βII inhibitors: virtual screening, molecular docking and molecular dynamics simulation studies. J Mol Model 2022; 28:117. [PMID: 35410409 DOI: 10.1007/s00894-022-05104-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 03/31/2022] [Indexed: 01/06/2023]
Abstract
Diabetic wounds (DWs) are the major end-stage manifestation encountered in diabetic patients. The two major pathways involved in the pathogenesis of DW are impaired angiogenesis and unnecessary NETosis, which are regulated by a common enzyme called protein kinase C (PKC)-βII. PKC-βII is a conventional isoform of PKC family that can be activated by calcium and diacylglycerol. PKC-βII possesses a specific expression profile and plays a distinct role in various cellular and molecular functions. The pathogenic role of PKC-βII and its involvement in the impairment of wound healing suggested that PKC-βII plays a potential role in DW progression. Hence, there is a renewed interest in developing specific inhibitors of PKC-βII. In the present study, receptor-based virtual screening was performed for the identification of potential PKC-βII inhibitors using TimTec, Enamine, Zinc and Specs databases. A total of 595 candidate compounds were evaluated based on absorption, distribution, metabolism, excretion and toxicity, standard precision docking. Further, extra-precision docking and binding free energy calculations were carried out for top-ranked compounds. Based on Glide score and protein-ligand interactions, we have identified compound 1 as a potential inhibitor. Finally, molecular dynamics (MD) simulation was performed for top compound 1 using the Desmond module (Schrödinger suite) to identify the structural stability of the protein-ligand complex. Gratifyingly, MD trajectory analysis demonstrated the stable binding conformation of compound 1 with PKC-βII enzyme. In silico approaches incorporated in this study provide a set of new putative PKC-βII inhibitors which could be potential leads to develop DW therapeutics.
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Affiliation(s)
| | - Vidyasrilekha Yele
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Marwadi University, Rajkot, Gujarat, 360003, India.
| | - Lalji Baldaniya
- Department of Pharmaceutics, Faculty of Pharmacy, Marwadi University, Rajkot, Gujarat, 360003, India
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Serum Calprotectin Level as an Inflammatory Marker in Newly Diagnosed Hypertensive Patients. Int J Hypertens 2022; 2022:6912502. [PMID: 35096423 PMCID: PMC8799354 DOI: 10.1155/2022/6912502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 12/31/2021] [Accepted: 01/06/2022] [Indexed: 12/20/2022] Open
Abstract
Background Hypertension is one of the leading causes of cardiovascular mortality. Although the pathogenetic process involved is not yet fully understood, the disease involves endothelial damage and inflammation. Calprotectin is an inflammatory marker that rises in parallel with disease activity in conditions such as systemic inflammatory diseases, infection, and atherosclerosis. The purpose of this study was to evaluate inflammation through serum calprotectin levels in newly diagnosed primary hypertension patients. Methods Forty-nine newly diagnosed hypertensive patients and 38 healthy adults were included in the study. Patients' office blood pressure values, biochemical findings, and demographic characteristics were recorded. Serum calprotectin levels were measured using ELISA. Parameters affecting serum calprotectin levels and determinants of hypertension were evaluated. Results Serum calprotectin levels were 242.8 (72.4–524) ng/mL in the control group and 112.6 (67.4–389.8) ng/mL in the hypertensive patient group, the difference being statistically significant (p=0.001). There was no correlation between serum calprotectin levels and other parameters (blood pressure values, age, gender, serum creatinine, uric acid, and calcium levels) in the hypertensive group. A lower serum calprotectin level was found to be independently related to hypertension (β = −0.009, p=0.005). Serum calprotectin at a cutoff level of 128.6 ng/mL differentiated hypertensives from healthy controls with a sensitivity of 69.4% and specificity of 68.4% (AUC = 0.767). Conclusions The results of this study were the opposite of our hypothesis that a higher calprotectin level may reflect subclinical endothelial damage in newly diagnosed hypertensive patients. Further comparative studies involving patients at different stages of hypertension may contribute to clarifying the relationship between calprotectin and hypertension. We conclude that molecular studies seem essential for understanding the place of calprotectin in hypertension-associated inflammation, a complex process.
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Galvão I, Sousa LP, Teixeira MM, Pinho V. PI3K Isoforms in Cell Signalling and Innate Immune Cell Responses. Curr Top Microbiol Immunol 2022; 436:147-164. [PMID: 36243843 DOI: 10.1007/978-3-031-06566-8_6] [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] [Indexed: 06/16/2023]
Abstract
Phosphoinositide-3-kinases (PI3Ks) are enzymes involved in signalling and modification of the function of all mammalian cells. These enzymes phosphorylate the 3-hydroxyl group of the inositol ring of phosphatidylinositol, resulting in lipid products that act as second messengers responsible for coordinating many cellular functions, including activation, chemotaxis, proliferation and survival. The identification of the functions that are mediated by a specific PI3K isoform is complex and depends on the specific cell type and inflammatory context. In this chapter we will focus on the role of PI3K isoforms in the context of innate immunity, focusing on the mechanisms by which PI3K signalling regulates phagocytosis, the activation of immunoglobulin, chemokine and cytokines receptors, production of ROS and cell migration, and how PI3K signalling plays a central role in host defence against infections and tissue injury.
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Affiliation(s)
- Izabela Galvão
- Immunopharmacology Laboratory, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Resolution of Inflammation Laboratory, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lirlândia P Sousa
- Signalling in Inflammation Laboratory, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Mauro M Teixeira
- Immunopharmacology Laboratory, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Vanessa Pinho
- Resolution of Inflammation Laboratory, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.
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Vaillancourt M, Hubert A, Subra C, Boucher J, Bazié WW, Vitry J, Berrazouane S, Routy JP, Trottier S, Tremblay C, Jenabian MA, Benmoussa A, Provost P, Tessier PA, Gilbert C. Velocity Gradient Separation Reveals a New Extracellular Vesicle Population Enriched in miR-155 and Mitochondrial DNA. Pathogens 2021; 10:pathogens10050526. [PMID: 33925397 PMCID: PMC8146806 DOI: 10.3390/pathogens10050526] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/10/2021] [Accepted: 04/20/2021] [Indexed: 12/18/2022] Open
Abstract
Extracellular vesicles (EVs) and their contents (proteins, lipids, messenger RNA, microRNA, and DNA) are viewed as intercellular signals, cell-transforming agents, and shelters for viruses that allow both diagnostic and therapeutic interventions. EVs circulating in the blood of individuals infected with human immunodeficiency virus (HIV-1) may provide insights into pathogenesis, inflammation, and disease progression. However, distinguishing plasma membrane EVs from exosomes, exomeres, apoptotic bodies, virions, and contaminating proteins remains challenging. We aimed at comparing sucrose and iodixanol density and velocity gradients along with commercial kits as a means of separating EVs from HIV particles and contaminating protein like calprotectin; and thereby evaluating the suitability of current plasma EVs analysis techniques for identifying new biomarkers of HIV-1 immune activation. Multiple analysis have been performed on HIV-1 infected cell lines, plasma from HIV-1 patients, or plasma from HIV-negative individuals spiked with HIV-1. Commercial kits, the differential centrifugation and density or velocity gradients to precipitate and separate HIV, EVs, and proteins such as calprotectin, have been used. EVs, virions, and contaminating proteins were characterized using Western blot, ELISA, RT-PCR, hydrodynamic size measurement, and enzymatic assay. Conversely to iodixanol density or velocity gradient, protein and virions co-sedimented in the same fractions of the sucrose density gradient than AChE-positive EVs. Iodixanol velocity gradient provided the optimal separation of EVs from viruses and free proteins in culture supernatants and plasma samples from a person living with HIV (PLWH) or a control and revealed a new population of large EVs enriched in microRNA miR-155 and mitochondrial DNA. Although EVs and their contents provide helpful information about several key events in HIV-1 pathogenesis, their purification and extensive characterization by velocity gradient must be investigated thoroughly before further use as biomarkers. By revealing a new population of EVs enriched in miR-155 and mitochondrial DNA, this study paves a way to increase our understanding of HIV-1 pathogenesis.
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Affiliation(s)
- Myriam Vaillancourt
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
| | - Audrey Hubert
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
| | - Caroline Subra
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
- The Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA
- U.S. Military HIV Research Program, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
| | - Julien Boucher
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
| | - Wilfried Wenceslas Bazié
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
- Programme de Recherche sur les Maladies Infectieuses, Centre Muraz, Institut National de Santé Publique, Bobo-Dioulasso 01 BP 390, Burkina Faso
| | - Julien Vitry
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
| | - Sofiane Berrazouane
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
| | - Jean-Pierre Routy
- Chronic Viral Illness Service and Division of Hematology, McGill University Health Centre, Montréal, QC H4A 3J1, Canada;
- Infectious Diseases and Immunity in Global Health Program, Research Institute, McGill University Health Centre, Montréal, QC H4A 3J1, Canada
| | - Sylvie Trottier
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
- Centre de Recherche du CHU de Québec, Department of Microbiology, Infectiology and Immunology, Faculty of Medicine, Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada
| | - Cécile Tremblay
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal, Montréal, QC H3C 3J7, Canada;
- Département de Microbiologie, Infectiologie et Immunologie, Faculté de Médecine, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Mohammad-Ali Jenabian
- Département des Sciences Biologiques et Centre de Recherche CERMO-FC, Université du Québec à Montréal (UQAM), Montréal, QC H2L 2C4, Canada;
| | - Abderrahim Benmoussa
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
- Department of Nutrition, CHU Sainte-Justine—Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Patrick Provost
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
- Centre de Recherche du CHU de Québec, Department of Microbiology, Infectiology and Immunology, Faculty of Medicine, Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada
| | - Philippe A. Tessier
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
- Centre de Recherche du CHU de Québec, Department of Microbiology, Infectiology and Immunology, Faculty of Medicine, Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada
| | - Caroline Gilbert
- Centre de Recherche du CHU de Québec-Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada; (M.V.); (A.H.); (C.S.); (J.B.); (W.W.B.); (J.V.); (S.B.); (S.T.); (A.B.); (P.P.); (P.A.T.)
- Centre de Recherche du CHU de Québec, Department of Microbiology, Infectiology and Immunology, Faculty of Medicine, Université Laval, T1-49, 2705 boulevard Laurier, Québec, QC G1V 4G2, Canada
- Correspondence: ; Tel.: +1-(418)-525-4444 (ext. 46107)
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Scanu A, Oliviero F, Luisetto R, Ramonda R, Doria A, Punzi L, Dayer JM. Effect of pathogenic crystals on the production of pro- and anti-inflammatory cytokines by different leukocyte populations. Immunobiology 2020; 226:152042. [PMID: 33285354 DOI: 10.1016/j.imbio.2020.152042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 03/04/2020] [Accepted: 11/23/2020] [Indexed: 02/07/2023]
Abstract
PURPOSE To evaluate cytokine production in vitro by different types of leukocytes stimulated with monosodium urate (MSU), calcium pyrophosphate (CPP) and basic calcium phosphate (BCP) crystals. MATERIAL AND METHODS Polymorphonuclear cells (PMN), monocytes and lymphocytes, isolated from healthy volunteer blood, were stimulated for different time periods with increasing MSU, CPP or BCP crystal concentrations. IL-1β, IL-8, IL-6, CCL2, IL-1Ra and TGFβ1 were determined by ELISA. RESULTS Exposure of PMN to different crystals resulted in a moderate IL-8 and IL-1Ra release. Stimulation of monocytes induced a significant production of all the cytokines evaluated. The highest levels of IL-1β, IL-6, CCL2 and IL-8 were observed with MSU at 0.5 mg/ml, CPP at 0.01-0.05 mg/ml and BCP at 1 mg/ml after 18-48 h and then decreased. At the same crystal concentrations, IL-1Ra and TGFβ1 increased until the end of the experiment. Treatment of lymphocytes with different crystals did not induce cytokine release. CONCLUSION This study demonstrates that PMN, monocytes and lymphocytes from the same donor respond differently after stimulation with MSU, CPP or BCP crystals, depending on the dose and the time of exposure. Crystals induce a rapid increase of pro-inflammatory cytokines, whereas longer time is required to release high levels of anti-inflammatory cytokines.
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Affiliation(s)
- Anna Scanu
- Rheumatology Unit, Department of Medicine-DIMED, University of Padova, Italy.
| | - Francesca Oliviero
- Rheumatology Unit, Department of Medicine-DIMED, University of Padova, Italy
| | - Roberto Luisetto
- Department of Surgery, Oncology and Gastroenterology-DISCOG, University of Padova, Italy
| | - Roberta Ramonda
- Rheumatology Unit, Department of Medicine-DIMED, University of Padova, Italy
| | - Andrea Doria
- Rheumatology Unit, Department of Medicine-DIMED, University of Padova, Italy
| | - Leonardo Punzi
- Centre for Gout and Metabolic Bone and Joint Diseases, Rheumatology, SS Giovanni and Paolo Hospital, Venice, Italy
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14
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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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15
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Sreejit G, Flynn MC, Patil M, Krishnamurthy P, Murphy AJ, Nagareddy PR. S100 family proteins in inflammation and beyond. Adv Clin Chem 2020; 98:173-231. [PMID: 32564786 DOI: 10.1016/bs.acc.2020.02.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The S100 family proteins possess a variety of intracellular and extracellular functions. They interact with multiple receptors and signal transducers to regulate pathways that govern inflammation, cell differentiation, proliferation, energy metabolism, apoptosis, calcium homeostasis, cell cytoskeleton and microbial resistance. S100 proteins are also emerging as novel diagnostic markers for identifying and monitoring various diseases. Strategies aimed at targeting S100-mediated signaling pathways hold a great potential in developing novel therapeutics for multiple diseases. In this chapter, we aim to summarize the current knowledge about the role of S100 family proteins in health and disease with a major focus on their role in inflammatory conditions.
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Affiliation(s)
| | - Michelle C Flynn
- Division of Immunometabolism, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| | - Mallikarjun Patil
- Department of Biomedical Engineering, Schools of Medicine and Engineering, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Prasanna Krishnamurthy
- Department of Biomedical Engineering, Schools of Medicine and Engineering, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Andrew J Murphy
- Division of Immunometabolism, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia; Department of Immunology, Monash University, Melbourne, VIC, Australia
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Abstract
The pathogenic potential of Listeria monocytogenes relies on the production of an arsenal of virulence determinants that have been extensively characterized, including surface and secreted proteins of the internalin family. We have previously shown that the Listeria secreted internalin InlC interacts with IκB kinase α to interfere with the host immune response (E. Gouin, M. Adib-Conquy, D. Balestrino, M.-A. Nahori, et al., Proc Natl Acad Sci USA, 107:17333–17338, 2010, https://doi.org/10.1073/pnas.1007765107). In the present work, we report that InlC is monoubiquitinated on K224 upon infection of cells and provide evidence that ubiquitinated InlC interacts with and stabilizes the alarmin S100A9, which is a critical regulator of the immune response and inflammatory processes. Additionally, we show that ubiquitination of InlC causes an increase in reactive oxygen species production by neutrophils in mice and restricts Listeria infection. These findings are the first to identify a posttranscriptional modification of an internalin contributing to host defense. Listeria monocytogenes is a pathogenic bacterium causing potentially fatal foodborne infections in humans and animals. While the mechanisms used by Listeria to manipulate its host have been thoroughly characterized, how the host controls bacterial virulence factors remains to be extensively deciphered. Here, we found that the secreted Listeria virulence protein InlC is monoubiquitinated by the host cell machinery on K224, restricting infection. We show that the ubiquitinated form of InlC interacts with the intracellular alarmin S100A9, resulting in its stabilization and in increased reactive oxygen species production by neutrophils in infected mice. Collectively, our results suggest that posttranslational modification of InlC exacerbates the host response upon Listeria infection.
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Cesaro A, Defrêne J, Lachhab A, Pagé N, Tardif MR, Al-Shami A, Oravecz T, Fortin PR, Daudelin JF, Labrecque N, Aoudjit F, Pelletier M, Tessier PA. Enhanced myelopoiesis and aggravated arthritis in S100a8-deficient mice. PLoS One 2019; 14:e0221528. [PMID: 31437241 PMCID: PMC6705798 DOI: 10.1371/journal.pone.0221528] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 08/08/2019] [Indexed: 12/29/2022] Open
Abstract
Expressed strongly by myeloid cells, damage-associated molecular pattern (DAMP) proteins S100A8 and S100A9 are found in the serum of patients with infectious and autoimmune diseases. Compared to S100A9, the role of S100A8 is controversial. We investigated its biological activity in collagen-induced arthritis using the first known viable and fertile S100a8-deficient (S100a8-/-) mouse. Although comparable to the wild type (WT) in terms of lymphocyte distribution in blood and in the primary and secondary lymphoid organs, S100a8-/- mice had increased numbers of neutrophils, monocytes and dendritic cells in the blood and bone marrow, and these all expressed myeloid markers such as CD11b, Ly6G and CD86 more strongly. Granulocyte-macrophage common precursors were increased in S100a8-/- bone marrow and yielded greater numbers of macrophages and dendritic cells in culture. The animals also developed more severe arthritic disease leading to aggravated osteoclast activity and bone destruction. These findings were correlated with increased inflammatory cell infiltration and cytokine secretion in the paws. This study suggests that S100A8 is an anti-inflammatory DAMP that regulates myeloid cell differentiation, thereby mitigating the development of experimental arthritis.
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Affiliation(s)
- Annabelle Cesaro
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
| | - Joan Defrêne
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
| | - Asmaa Lachhab
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
| | - Nathalie Pagé
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
| | - Mélanie R. Tardif
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
| | - Amin Al-Shami
- Lexicon Pharmaceuticals, Inc., The Woodlands, Texas, United States of America
| | - Tamas Oravecz
- Lexicon Pharmaceuticals, Inc., The Woodlands, Texas, United States of America
| | - Paul R. Fortin
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
- Département de médecine, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
| | | | - Nathalie Labrecque
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada
- Department of Medicine and Department of Microbiology, Infectiology and Immunology, Université de Montréal, Montréal, Canada
| | - Fawzi Aoudjit
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
- Département de microbiologie-infectiologie et d’immunologie, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
| | - Martin Pelletier
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
- Département de microbiologie-infectiologie et d’immunologie, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
| | - Philippe A. Tessier
- Axe de recherche sur les maladies infectieuses et immunitaires, Centre de recherche du CHU de Québec-Université Laval, Quebec city, Quebec, Canada
- Département de microbiologie-infectiologie et d’immunologie, Faculté de Médecine, Université Laval, Quebec City, Quebec, Canada
- * E-mail:
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NLRP3 inflammasome activation in inflammaging. Semin Immunol 2018; 40:61-73. [PMID: 30268598 DOI: 10.1016/j.smim.2018.09.001] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/17/2018] [Accepted: 09/18/2018] [Indexed: 02/06/2023]
Abstract
The process of aging is associated with the appearance of low-grade subclinical inflammation, termed inflammaging, that can accelerate age-related diseases. In Western societies the age-related inflammatory response can additionally be aggravated by an inflammatory response related to modern lifestyles and excess calorie consumption, a pathophysiologic inflammatory response that was coined metaflammation. Here, we summarize the current knowledge of mechanisms that drive both of these processes and focus our discussion the emerging concept that a key innate immune pathway, the NLRP3 inflammasome, is centrally involved in the recognition of triggers that appear during physiological aging and during metabolic stress. We further discuss how these processes are involved in the pathogenesis of common age-related pathologies and highlight potential strategies by which the detrimental inflammatory responses could be pharmacologically addressed.
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Specific PKC βII inhibitor: one stone two birds in the treatment of diabetic foot ulcers. Biosci Rep 2018; 38:BSR20171459. [PMID: 29440456 PMCID: PMC6127666 DOI: 10.1042/bsr20171459] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 01/21/2018] [Accepted: 02/08/2018] [Indexed: 01/05/2023] Open
Abstract
To explore whether or not inhibition of protein kinase C βII (PKC βII) stimulates angiogenesis as well as prevents excessive NETosis in diabetics thus accelerating wound healing. Streptozotocin (STZ, 60 mg/kg/day for 5 days, i.p.) was injected to induce type I diabetes in male ICR mice. Mice were treated with ruboxistaurin (30 mg/kg/day, orally) for 14 consecutive days. Wound closure was evaluated by wound area and number of CD31-stained capillaries. Peripheral blood flow cytometry was done to evaluate number of circulating endothelial progenitor cells (EPCs). NETosis assay and wound tissue immunofluorescence imaging were done to evaluate the percentage of neutrophils undergoing NETosis. Furthermore, the expression of PKC βII, protein kinase B (Akt), endothelial nitric oxide synthase (eNOS), vascular endothelial growth factor (VEGF), and histone citrullation (H3Cit) were determined in the wound by Western blot analysis. Ruboxistaurin accelerated wound closure and stimulated angiogenesis in diabetic mice. The number of circulating EPCs was increased significantly in ruboxistaurin-treated diabetic mice. Moreover, ruboxistaurin treatment significantly decreases the percentages of H3Cit+ cells in both peripheral blood and wound areas. This prevented excess activated neutrophils forming an extracellular trap (NETs) formation. The expressions of phospho-Akt (p-Akt), phospho-eNOS (p-eNOS), and VEGF increased significantly in diabetic mice on ruboxistaurin treatment. The expressions of PKC βII and H3Cit+, on the other hand, decreased with ruboxistaurin treatment. The results of the present study suggest that ruboxistaurin by inhibiting PKC βII activation, reverses EPCs dysfunction as well as prevents exaggerated NETs formation in a diabetic mouse model; thereby accelerating the wound healing process.
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20
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Wang C, Iashchishyn IA, Pansieri J, Nyström S, Klementieva O, Kara J, Horvath I, Moskalenko R, Rofougaran R, Gouras G, Kovacs GG, Shankar SK, Morozova-Roche LA. S100A9-Driven Amyloid-Neuroinflammatory Cascade in Traumatic Brain Injury as a Precursor State for Alzheimer's Disease. Sci Rep 2018; 8:12836. [PMID: 30150640 PMCID: PMC6110751 DOI: 10.1038/s41598-018-31141-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 08/13/2018] [Indexed: 12/22/2022] Open
Abstract
Pro-inflammatory and amyloidogenic S100A9 protein is an important contributor to Alzheimer's disease (AD) pathology. Traumatic brain injury (TBI) is viewed as a precursor state for AD. Here we have shown that S100A9-driven amyloid-neuroinflammatory cascade was initiated in TBI and may serve as a mechanistic link between TBI and AD. By analyzing the TBI and AD human brain tissues, we demonstrated that in post-TBI tissues S100A9, produced by neurons and microglia, becomes drastically abundant compared to Aβ and contributes to both precursor-plaque formation and intracellular amyloid oligomerization. Conditions implicated in TBI, such as elevated S100A9 concentration, acidification and fever, provide strong positive feedback for S100A9 nucleation-dependent amyloid formation and delay in its proteinase clearance. Consequently, both intracellular and extracellular S100A9 oligomerization correlated with TBI secondary neuronal loss. Common morphology of TBI and AD plaques indicated their similar initiation around multiple aggregation centers. Importantly, in AD and TBI we found S100A9 plaques without Aβ. S100A9 and Aβ plaque pathology was significantly advanced in AD cases with TBI history at earlier age, signifying TBI as a risk factor. These new findings highlight the detrimental consequences of prolonged post-TBI neuroinflammation, which can sustain S100A9-driven amyloid-neurodegenerative cascade as a specific mechanism leading to AD development.
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Affiliation(s)
- Chao Wang
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden.
| | - Igor A Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden.,Department of General Chemistry, Sumy State University, Sumy, 40000, Ukraine
| | - Jonathan Pansieri
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Sofie Nyström
- IFM-Department of Chemistry, Linköping University, 58183, Linköping, Sweden
| | - Oxana Klementieva
- Department of Experimental Medical Sciences, Lund University, 22184, Lund, Sweden
| | - John Kara
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Istvan Horvath
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Roman Moskalenko
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden.,Department of Pathology, Sumy State University, Sumy, 40000, Ukraine
| | - Reza Rofougaran
- Department of Medical Biochemistry and Biophysics, Umeå University, 90187, Umeå, Sweden
| | - Gunnar Gouras
- Department of Experimental Medical Sciences, Lund University, 22184, Lund, Sweden
| | - Gabor G Kovacs
- Institute of Neurology, Medical University of Vienna, 1097, Vienna, Austria
| | - S K Shankar
- Human Brain Tissue Repository, Department of Neuropathology, National Institute of Mental Health and Neurosciences, 560029, Bangalore, India
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21
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Proust A, Lévesque JC, Barat C, Sato S, Tremblay MJ. A new tool for detection of extracellular traps. Methods Appl Fluoresc 2018; 6:037002. [PMID: 29765013 DOI: 10.1088/2050-6120/aac51b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Extracellular traps ejected by various immune cells (neutrophils, macrophages, eosinophils and mast cells) have several immune functions, either protective against pathogens or deleterious in some autoimmune or inflammatory disorders. Since their first description in 2004, the mechanisms of extracellular traps formation have been extensively investigated though still not fully understood. We describe here a new tool for the detection of extracellular traps by fluorescence microscopy in a single-step staining protocol, which does not require any wash. The approach uses the GreenGlo™ DNA dye, which can differentiate between nuclear DNA and extracellular DNA (extracellular traps) released from cells using different fluorescence excitation wavelengths. GreenGlo™ staining is suitable for adherent and non-adherent cells and is expected to be extendable to extracellular traps from other cells types (i.e. eosinophils, mast cells and monocytes).
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Affiliation(s)
- Alizé Proust
- Axe des Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Pavillon CHUL, Québec (QC), G1V 4G2, Canada
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22
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Xu X, Chen Z, Zhu X, Wang D, Liang J, Zhao C, Feng X, Wang J, Zou H, Sun L. S100A9 aggravates bleomycin-induced dermal fibrosis in mice via activation of ERK1/2 MAPK and NF-κB pathways. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2018; 21:194-201. [PMID: 29456817 PMCID: PMC5811759 DOI: 10.22038/ijbms.2018.19987.5255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVES This study aims to investigate the pathogenicity and possible mechanisms of S100A9 function in mice models of scleroderma. MATERIALS AND METHODS The content of S100A9 in the skin tissues of mice with scleroderma was determined. Different concentrations of bleomycin (BLM) and S100A9 were subcutaneously injected into the backs of mice simultaneously, and then pathological changes in the skin of these mice were monitored. Specifically, the levels of inflammatory cytokines and alpha smooth muscle actin (α-SMA), the activation of extracellular regulated kinase 1/2 (ERK1/2), mitogen-activated protein kinase (MAPK) and nuclear factor-kappa B (NF-κB) pathways, and the expression of the receptor for advanced glycation end-product (RAGE) in the skin were determined. RESULTS The content of S100A9 in the skin tissues of mice with scleroderma was determined. Different concentrations of BLM and S100A9 were subcutaneously injected into the backs of mice simultaneously, and then pathological changes in the skin of these mice were monitored. Specifically, the levels of inflammatory cytokines and alpha smooth muscle actin (α-SMA), the activation of extracellular regulated kinase 1/2 (ERK1/2) mitogen-activated protein kinase (MAPK) and nuclear factor-kappa B (NF-κB) pathways, and the expression of the receptor for advanced glycation end-product (RAGE) in the skin were determined. CONCLUSION S100A9 aggravates dermal fibrosis in BLM-induced scleroderma (BIS) mice, and its mechanisms might be mediated by RAGE, ERK1/2, and NF-κB pathway.
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Affiliation(s)
- Xue Xu
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, Jiangsu, China
| | - Zhiyong Chen
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, Jiangsu, China
| | - Xiaoxia Zhu
- Division of Rheumatology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Dandan Wang
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, Jiangsu, China
| | - Jun Liang
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, Jiangsu, China
| | - Cheng Zhao
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, Jiangsu, China
| | - Xuebing Feng
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, Jiangsu, China
| | - Jiucun Wang
- State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Hejian Zou
- Division of Rheumatology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Lingyun Sun
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, the Affiliated Hospital of Nanjing University Medical School, Nanjing 210008, Jiangsu, China
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23
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Proust A, Barat C, Leboeuf M, Drouin J, Tremblay MJ. Contrasting effect of the latency-reversing agents bryostatin-1 and JQ1 on astrocyte-mediated neuroinflammation and brain neutrophil invasion. J Neuroinflammation 2017; 14:242. [PMID: 29228979 PMCID: PMC5725742 DOI: 10.1186/s12974-017-1019-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 12/01/2017] [Indexed: 12/14/2022] Open
Abstract
Background Despite effectiveness of the combined antiretroviral therapy, HIV-1 persists in long-lived latently infected cells. Consequently, new therapeutic approaches aimed at eliminating this latent reservoir are currently being developed. A “shock and kill” strategy using latency-reversing agents (LRA) to reactivate HIV-1 has been proposed. However, the impact of LRA on the central nervous system (CNS) remains elusive. Methods We used human fetal astrocytes and investigated the effects of several LRA on their functional and secretory activities. Astrocytes were infected with VSV-G-pseudotyped HIV-1 before treatment with various blood-brain barrier (BBB)-permeable LRA at subcytotoxic doses, which allow HIV-1 reactivation based on previous in vitro and clinical studies. Cells and supernatants were then used to evaluate effects of infection and LRA on (i) viability and metabolic activity of astrocytes using a colorimetric MTS assay; (ii) chemokines and proinflammatory cytokines secretion and gene expression by astrocytes using ELISA and RT-qPCR, respectively; (iii) expression of complement component 3 (C3), a proxy for astrogliosis, by RT-qPCR; (iv) glutamate uptake capacity by a fluorometric assay; and (v) modulation of neutrophil transmigration across an in vitro BBB model. Results We demonstrate that bryostatin-1 induces secretion of chemokines CCL2 and IL-8 and proinflammatory cytokines IL-6 and GM-CSF, whereas their production is repressed by JQ1. Bryostatin-1 also increases expression of complement component 3 and perturbs astrocyte glutamate homeostasis. Lastly, bryostatin-1 enhances transmigration of neutrophils across an in vitro blood-brain barrier model and induces formation of neutrophil extracellular traps. Conclusions These observations highlight the need to carefully assess the potential harmful effect to the CNS when selecting LRA for HIV-1 reactivation strategies. Electronic supplementary material The online version of this article (10.1186/s12974-017-1019-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Alizé Proust
- Axe des Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Pavillon CHUL, Québec, G1V 4G2, Canada
| | - Corinne Barat
- Axe des Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Pavillon CHUL, Québec, G1V 4G2, Canada
| | - Mathieu Leboeuf
- Département d'obstétrique, gynécologie et reproduction, Faculté de Médecine,, Université Laval, Québec, G1V 0A6, Canada
| | - Jean Drouin
- Département de médecine familiale et d'urgence, Faculté de Médecine, Université Laval, Québec, G1V 0A6, Canada
| | - Michel J Tremblay
- Axe des Maladies Infectieuses et Immunitaires, Centre de Recherche du CHU de Québec-Université Laval, Pavillon CHUL, Québec, G1V 4G2, Canada. .,Département de Microbiologie-Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, G1V 0A6, Canada.
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24
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Goldberg EL, Asher JL, Molony RD, Shaw AC, Zeiss CJ, Wang C, Morozova-Roche LA, Herzog RI, Iwasaki A, Dixit VD. β-Hydroxybutyrate Deactivates Neutrophil NLRP3 Inflammasome to Relieve Gout Flares. Cell Rep 2017; 18:2077-2087. [PMID: 28249154 DOI: 10.1016/j.celrep.2017.02.004] [Citation(s) in RCA: 240] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 11/16/2016] [Accepted: 01/30/2017] [Indexed: 01/01/2023] Open
Abstract
Aging and lipotoxicity are two major risk factors for gout that are linked by the activation of the NLRP3 inflammasome. Neutrophil-mediated production of interleukin-1β (IL-1β) drives gouty flares that cause joint destruction, intense pain, and fever. However, metabolites that impact neutrophil inflammasome remain unknown. Here, we identified that ketogenic diet (KD) increases β-hydroxybutyrate (BHB) and alleviates urate crystal-induced gout without impairing immune defense against bacterial infection. BHB inhibited NLRP3 inflammasome in S100A9 fibril-primed and urate crystal-activated macrophages, which serve to recruit inflammatory neutrophils in joints. Consistent with reduced gouty flares in rats fed a ketogenic diet, BHB blocked IL-1β in neutrophils in a NLRP3-dependent manner in mice and humans irrespective of age. Mechanistically, BHB inhibited the NLRP3 inflammasome in neutrophils by reducing priming and assembly steps. Collectively, our studies show that BHB, a known alternate metabolic fuel, is also an anti-inflammatory molecule that may serve as a treatment for gout.
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Affiliation(s)
- Emily L Goldberg
- Section of Comparative Medicine, Yale School of Medicine, New Haven, CT 06520, USA; Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Jennifer L Asher
- Section of Comparative Medicine, Yale School of Medicine, New Haven, CT 06520, USA
| | - Ryan D Molony
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA
| | - Albert C Shaw
- Section of Infectious Diseases, Yale School of Medicine, New Haven, CT 06520, USA
| | - Caroline J Zeiss
- Section of Comparative Medicine, Yale School of Medicine, New Haven, CT 06520, USA
| | - Chao Wang
- Department of Medical Biochemistry and Biophysics, Umeå University, 901 87 Umeå, Sweden
| | | | - Raimund I Herzog
- Section of Endocrinology and Metabolism, Yale School of Medicine, New Haven, CT 06520, USA
| | - Akiko Iwasaki
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815-6789, USA
| | - Vishwa Deep Dixit
- Section of Comparative Medicine, Yale School of Medicine, New Haven, CT 06520, USA; Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA; Yale Center for Research on Aging, Yale School of Medicine, New Haven, CT 06520, USA.
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25
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Rousseau LS, Paré G, Lachhab A, Naccache PH, Marceau F, Tessier P, Pelletier M, Fernandes M. S100A9 potentiates the activation of neutrophils by the etiological agent of gout, monosodium urate crystals. J Leukoc Biol 2017; 102:805-813. [PMID: 28550118 DOI: 10.1189/jlb.3ma0117-020r] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Revised: 04/20/2017] [Accepted: 05/02/2017] [Indexed: 01/15/2023] Open
Abstract
Gout is one of the most painful types of arthritis that arises when the body mounts an acute inflammatory reaction against a crystallized form of uric acid known as monosodium urate crystals (MSUs). Although MSUs are known to activate neutrophils, the most abundant leukocyte in the synovial fluid of patients with gout, few studies have investigated the effect on neutrophils of the simultaneous stimulation with MSU and proinflammatory mediators in the inflamed joint. Herein, we focused on a protein that is highly expressed in the synovium in gout, S100A9. The predominant expression of S100A9 in and around blood vessels suggests it may prime neutrophils during their migration toward the inflamed joint. Using a combination of functional and signaling assays, we found that S100A9 enhances the production of radical oxygen species as well as IL-1 and IL-8 release by human neutrophils activated with MSU. Moreover, upstream and downstream signaling events activated by MSUs in human neutrophils were also potentiated by S100A9, including the mobilization of intracellular calcium stores, tyrosine phosphorylation, the serine phosphorylation of PKC substrates, Akt, and p38. We also show that S100A9 alone increases glycolysis in human neutrophils, which is suggestive of an additional mechanism through which neutrophils can be primed. Together, our observations indicate a novel way in which S100A9 may contribute to the pathogenesis of gout, by priming neutrophils to respond to MSUs.
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Affiliation(s)
- Louis-Simon Rousseau
- Department of Microbiology-Infectious Diseases and Immunology, Faculty of Medicine, Laval University, Ville de Québec, Québec, Canada
| | - Guillaume Paré
- Department of Microbiology-Infectious Diseases and Immunology, Faculty of Medicine, Laval University, Ville de Québec, Québec, Canada
| | - Asmaa Lachhab
- Department of Microbiology-Infectious Diseases and Immunology, Faculty of Medicine, Laval University, Ville de Québec, Québec, Canada
| | - Paul H Naccache
- Department of Microbiology-Infectious Diseases and Immunology, Faculty of Medicine, Laval University, Ville de Québec, Québec, Canada
| | - François Marceau
- Department of Microbiology-Infectious Diseases and Immunology, Faculty of Medicine, Laval University, Ville de Québec, Québec, Canada
| | - Philippe Tessier
- Department of Microbiology-Infectious Diseases and Immunology, Faculty of Medicine, Laval University, Ville de Québec, Québec, Canada
| | - Martin Pelletier
- Department of Microbiology-Infectious Diseases and Immunology, Faculty of Medicine, Laval University, Ville de Québec, Québec, Canada
| | - Maria Fernandes
- Department of Microbiology-Infectious Diseases and Immunology, Faculty of Medicine, Laval University, Ville de Québec, Québec, Canada
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26
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S100A9 induces differentiation of acute myeloid leukemia cells through TLR4. Blood 2017; 129:1980-1990. [PMID: 28137827 DOI: 10.1182/blood-2016-09-738005] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 01/20/2017] [Indexed: 12/22/2022] Open
Abstract
S100A8 and S100A9 are calcium-binding proteins predominantly expressed by neutrophils and monocytes and play key roles in both normal and pathological inflammation. Recently, both proteins were found to promote tumor progression through the establishment of premetastatic niches and inhibit antitumor immune responses. Although S100A8 and S100A9 have been studied in solid cancers, their functions in hematological malignancies remain poorly understood. However, S100A8 and S100A9 are highly expressed in acute myeloid leukemia (AML), and S100A8 expression has been linked to poor prognosis in AML. We identified a small subpopulation of cells expressing S100A8 and S100A9 in AML mouse models and primary human AML samples. In vitro and in vivo analyses revealed that S100A9 induces AML cell differentiation, whereas S100A8 prevents differentiation induced by S100A9 activity and maintains AML immature phenotype. Treatment with recombinant S100A9 proteins increased AML cell maturation, induced growth arrest, and prolonged survival in an AML mouse model. Interestingly, anti-S100A8 antibody treatment had effects similar to those of S100A9 therapy in vivo, suggesting that high ratios of S100A9 over S100A8 are required to induce differentiation. Our in vitro studies on the mechanisms/pathways involved in leukemic cell differentiation revealed that binding of S100A9 to Toll-like receptor 4 (TLR4) promotes activation of p38 mitogen-activated protein kinase, extracellular signal-regulated kinases 1 and 2, and Jun N-terminal kinase signaling pathways, leading to myelomonocytic and monocytic AML cell differentiation. These findings indicate that S100A8 and S100A9 are regulators of myeloid differentiation in leukemia and have therapeutic potential in myelomonocytic and monocytic AMLs.
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27
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Asakura M, Karaki F, Fujii H, Atsuda K, Itoh T, Fujiwara R. Vildagliptin and its metabolite M20.7 induce the expression of S100A8 and S100A9 in human hepatoma HepG2 and leukemia HL-60 cells. Sci Rep 2016; 6:35633. [PMID: 27759084 PMCID: PMC5069476 DOI: 10.1038/srep35633] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 10/03/2016] [Indexed: 01/27/2023] Open
Abstract
Vildagliptin is a potent, orally active inhibitor of dipeptidyl peptidase-4 (DPP-4) for the treatment of type 2 diabetes mellitus. It has been reported that vildagliptin can cause hepatic dysfunction in patients. However, the molecular-mechanism of vildagliptin-induced liver dysfunction has not been elucidated. In this study, we employed an expression microarray to determine hepatic genes that were highly regulated by vildagliptin in mice. We found that pro-inflammatory S100 calcium-binding protein (S100) a8 and S100a9 were induced more than 5-fold by vildagliptin in the mouse liver. We further examined the effects of vildagliptin and its major metabolite M20.7 on the mRNA expression levels of S100A8 and S100A9 in human hepatoma HepG2 and leukemia HL-60 cells. In HepG2 cells, vildagliptin, M20.7, and sitagliptin - another DPP-4 inhibitor - induced S100A9 mRNA. In HL-60 cells, in contrast, S100A8 and S100A9 mRNAs were significantly induced by vildagliptin and M20.7, but not by sitagliptin. The release of S100A8/A9 complex in the cell culturing medium was observed in the HL-60 cells treated with vildagliptin and M20.7. Therefore, the parental vildagliptin- and M20.7-induced release of S100A8/A9 complex from immune cells, such as neutrophils, might be a contributing factor of vildagliptin-associated liver dysfunction in humans.
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Affiliation(s)
- Mitsutoshi Asakura
- Graduate School of Pharmaceutical Sciences (M.A.) and School of Pharmacy, Kitasato University, Tokyo, Japan
| | - Fumika Karaki
- Graduate School of Pharmaceutical Sciences (M.A.) and School of Pharmacy, Kitasato University, Tokyo, Japan
| | - Hideaki Fujii
- Graduate School of Pharmaceutical Sciences (M.A.) and School of Pharmacy, Kitasato University, Tokyo, Japan
| | - Koichiro Atsuda
- Graduate School of Pharmaceutical Sciences (M.A.) and School of Pharmacy, Kitasato University, Tokyo, Japan
| | - Tomoo Itoh
- Graduate School of Pharmaceutical Sciences (M.A.) and School of Pharmacy, Kitasato University, Tokyo, Japan
| | - Ryoichi Fujiwara
- Graduate School of Pharmaceutical Sciences (M.A.) and School of Pharmacy, Kitasato University, Tokyo, Japan
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28
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Fadini GP, Menegazzo L, Scattolini V, Gintoli M, Albiero M, Avogaro A. A perspective on NETosis in diabetes and cardiometabolic disorders. Nutr Metab Cardiovasc Dis 2016; 26:1-8. [PMID: 26719220 DOI: 10.1016/j.numecd.2015.11.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 11/12/2015] [Accepted: 11/16/2015] [Indexed: 01/18/2023]
Abstract
AIMS To review the significance of a new type of neutrophil cell death (NETosis) in diabetes and cardiometabolic diseases. DATA SYNTHESIS Diabetes and the metabolic syndrome are characterized by activation of the innate immune system. In this framework, neutrophils are front line defences against infections, but can also turn deleterious if abnormally stimulated. NETosis refers to a type of cell death whereby neutrophils release nuclear material and granule enzymes that together form the NETs (neutrophil extracellular traps). As NETs entrap bacteria, NETosis is instrumental to the clearance of microorganisms, but an exaggerated NETosis response can also lead to tissue damage in several pathological conditions. In diabetes, the finely tuned balance of NETosis required to protect the human body from microorganisms yet avoiding self-damage seems to be lost. In fact, in vitro induction of NETosis and circulating concentrations of NET-associated proteins appear to be enhanced in diabetic patients. Furthermore, NETs contribute to endothelial damage, thrombosis, and ischemia/reperfusion injury, making it a novel player in the pathobiology of cardiovascular disease. Though the cellular events taking place during NETosis have been described and directly visualized, its molecular machinery is still incompletely understood. Protein kinase C (PKC) and NADPH oxidase (NOX) are two important targets to counter NETosis in the setting of diabetes. CONCLUSIONS NETosis appears to be part of an abnormal response to damage in diabetes that, in turn, can promote or aggravate end-organ complications. We suggest that this will be a hot topic of investigation in diabetology in the near future.
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Affiliation(s)
- G P Fadini
- Department of Medicine, University of Padova, 35128 Padova, Italy; Venetian Institute of Molecular Medicine, 35129 Padova, Italy.
| | - L Menegazzo
- Department of Medicine, University of Padova, 35128 Padova, Italy; Venetian Institute of Molecular Medicine, 35129 Padova, Italy
| | - V Scattolini
- Department of Medicine, University of Padova, 35128 Padova, Italy; Venetian Institute of Molecular Medicine, 35129 Padova, Italy
| | - M Gintoli
- Department of Physics and Astronomy "G. Galilei", University of Padova, 35131 Padova, Italy
| | - M Albiero
- Department of Medicine, University of Padova, 35128 Padova, Italy; Venetian Institute of Molecular Medicine, 35129 Padova, Italy
| | - A Avogaro
- Department of Medicine, University of Padova, 35128 Padova, Italy; Venetian Institute of Molecular Medicine, 35129 Padova, Italy
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29
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Tardif MR, Chapeton-Montes JA, Posvandzic A, Pagé N, Gilbert C, Tessier PA. Secretion of S100A8, S100A9, and S100A12 by Neutrophils Involves Reactive Oxygen Species and Potassium Efflux. J Immunol Res 2015; 2015:296149. [PMID: 27057553 PMCID: PMC4736198 DOI: 10.1155/2015/296149] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 11/06/2015] [Accepted: 12/01/2015] [Indexed: 12/15/2022] Open
Abstract
S100A8/A9 (calprotectin) and S100A12 proinflammatory mediators are found at inflammatory sites and in the serum of patients with inflammatory or autoimmune diseases. These cytoplasmic proteins are secreted by neutrophils at sites of inflammation via alternative secretion pathways of which little is known. This study examined the nature of the stimuli leading to S100A8/A9 and S100A12 secretion as well as the mechanism involved in this alternative secretion pathway. Chemotactic agents, cytokines, and particulate molecules were used to stimulate human neutrophils. MSU crystals, PMA, and H2O2 induced the release of S100A8, S100A9, and S100A12 homodimers, as well as S100A8/A9 heterodimer. High concentrations of S100A8/A9 and S100A12 were secreted in response to nanoparticles like MSU, silica, TiO2, fullerene, and single-wall carbon nanotubes as well as in response to microbe-derived molecules, such as zymosan or HKCA. However, neutrophils exposed to the chemotactic factors fMLP failed to secrete S100A8/A9 or S100A12. Secretion of S100A8/A9 was dependent on the production of reactive oxygen species and required K(+) exchanges through the ATP-sensitive K(+) channel. Altogether, these findings suggest that S100A12 and S100A8/A9 are secreted independently either via distinct mechanisms of secretion or following the activation of different signal transduction pathways.
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Affiliation(s)
- Mélanie R. Tardif
- Axe de Recherche sur les Maladies Infectieuses et L'immunologie, Centre de Recherche du CHU de Québec-Université Laval, and Département de Microbiologie-Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, QC, Canada G1V 0A6
| | - Julie Andrea Chapeton-Montes
- Axe de Recherche sur les Maladies Infectieuses et L'immunologie, Centre de Recherche du CHU de Québec-Université Laval, and Département de Microbiologie-Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, QC, Canada G1V 0A6
| | - Alma Posvandzic
- Axe de Recherche sur les Maladies Infectieuses et L'immunologie, Centre de Recherche du CHU de Québec-Université Laval, and Département de Microbiologie-Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, QC, Canada G1V 0A6
| | - Nathalie Pagé
- Axe de Recherche sur les Maladies Infectieuses et L'immunologie, Centre de Recherche du CHU de Québec-Université Laval, and Département de Microbiologie-Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, QC, Canada G1V 0A6
| | - Caroline Gilbert
- Axe de Recherche sur les Maladies Infectieuses et L'immunologie, Centre de Recherche du CHU de Québec-Université Laval, and Département de Microbiologie-Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, QC, Canada G1V 0A6
| | - Philippe A. Tessier
- Axe de Recherche sur les Maladies Infectieuses et L'immunologie, Centre de Recherche du CHU de Québec-Université Laval, and Département de Microbiologie-Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, QC, Canada G1V 0A6
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Serum calprotectin--a promising diagnostic marker for adult-onset Still's disease. Clin Rheumatol 2015; 35:73-9. [PMID: 26547221 PMCID: PMC4710651 DOI: 10.1007/s10067-015-3108-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 09/22/2015] [Accepted: 10/27/2015] [Indexed: 11/04/2022]
Abstract
Calprotectin is a calcium-binding cytosolic protein, mainly expressed in immune cells, such as neutrophils, monocytes, and macrophages. Our study aimed to evaluate the diagnostic value of calprotectin for adult-onset Still’s disease (AOSD), by comparing serum calprotectin concentrations in patients with AOSD (n = 46), rheumatoid arthritis (RA, n = 34), primary Sjögren syndrome (pSS, n = 40), systemic lupus erythematosus (SLE, n = 39), osteoarthritis (OA, n = 20), and healthy controls (HCs, n = 49). Calprotectin concentrations were significantly higher in patients with AOSD (55.26 ± 18.00 ng/ml), compared to patients with RA (39.17 ± 18.90 ng/ml), pSS (35.31 ± 19.47 ng/ml), SLE (32.21 ± 25.01 ng/ml), OA (19.24 ± 10.67 ng/ml), and HCs (8.46 ± 5.17 ng/ml). All the differences were highly significant (p < 0.001). Using receiver-operating characteristic curve, the cut-off value of calprotectin was defined as 45.488 ng/ml, and its sensitivity and specificity for AOSD diagnosis were 63.0 and 80.1 %, respectively. The positive rate of calprotectin was significantly higher in AOSD cases compared to patients with other diseases and healthy controls (p < 0.001). Serum calprotectin was positively correlated with ferritin (r = 0.294, p < 0.05), and concentration of hemoglobin was significantly lower in calprotectin-positive patients compared to negative patients in AOSD (103.49 ± 20.21 g/l vs 115.71 ± 15.59 g/l, t = −2.142, p = 0.038). These findings suggest that serum calprotectin may serve as a promising marker for the diagnosis of AOSD and monitor disease activity to a certain extent.
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Zhu A, Zou T, Xiong G, Zhang J. Association of uric acid with traditional inflammatory factors in stroke. Int J Neurosci 2015; 126:335-41. [PMID: 26001205 DOI: 10.3109/00207454.2015.1015723] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Uric acid (UA) plays an important role in the oxidant stress that causes inflammation. We assessed the association between UA and neutrophil ratio, white blood cell (WBC) count and blood lipid in 524 patients admitted with stroke. Stroke patients with a neutrophil ratio >70% displayed significantly lower UA levels than those with a neutrophil ratio ≤70% (p < 0.05). According to UA quartiles, neutrophil ratio, WBC count, and high-density lipoprotein cholesterol in the UA grade 1 group (≤214.10 μmol/L) were significantly increased over those in other UA grade groups. The results of stepwise regression analysis found that UA levels were inversely associated with neutrophil ratios (B ± SE = -1.11 ± 0.35), high-density lipoprotein cholesterol (B ± SE = -46.18 ± 14.17), total cholesterol (B ± SE = 9.82 ± 3.66), blood urea nitrogen (B ± SE = 6.30 ± 1.73), and creatinine (B ± SE = 0.63 ± 0.10). There is a correlationship between lower serum uric acid with neutrophil ratios in inflammation associated with stroke and the reasons need to be investigated further.
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Affiliation(s)
- Aiqun Zhu
- a Nursing School of Central South University; The Second Xiangya Hospital of Central South University ; Changsha , Hunan 410013 , China
| | - Ting Zou
- b Department of Neurology, The Second Xiangya Hospital , Central South University , Changsha , Hunan 410011 , China
| | - Guangzhong Xiong
- c Department of Emergency, The Second Xiangya Hospital , Central South University , Changsha , Hunan 410011 , China
| | - Jingping Zhang
- d Nursing School of Central South University , Changsha , Hunan 410013 , China
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Schauer C, Janko C, Munoz LE, Zhao Y, Kienhöfer D, Frey B, Lell M, Manger B, Rech J, Naschberger E, Holmdahl R, Krenn V, Harrer T, Jeremic I, Bilyy R, Schett G, Hoffmann M, Herrmann M. Aggregated neutrophil extracellular traps limit inflammation by degrading cytokines and chemokines. Nat Med 2014; 20:511-7. [PMID: 24784231 DOI: 10.1038/nm.3547] [Citation(s) in RCA: 632] [Impact Index Per Article: 63.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 03/26/2014] [Indexed: 02/05/2023]
Abstract
Gout is characterized by an acute inflammatory reaction and the accumulation of neutrophils in response to monosodium urate (MSU) crystals. Inflammation resolves spontaneously within a few days, although MSU crystals can still be detected in the synovial fluid and affected tissues. Here we report that neutrophils recruited to sites of inflammation undergo oxidative burst and form neutrophil extracellular traps (NETs). Under high neutrophil densities, these NETs aggregate and degrade cytokines and chemokines via serine proteases. Tophi, the pathognomonic structures of chronic gout, share characteristics with aggregated NETs, and MSU crystals can induce NETosis and aggregation of NETs. In individuals with impaired NETosis, MSU crystals induce uncontrolled production of inflammatory mediators from neutrophils and persistent inflammation. Furthermore, in models of neutrophilic inflammation, NETosis-deficient mice develop exacerbated and chronic disease that can be reduced by adoptive transfer of aggregated NETs. These findings suggest that aggregated NETs promote the resolution of neutrophilic inflammation by degrading cytokines and chemokines and disrupting neutrophil recruitment and activation.
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Affiliation(s)
- Christine Schauer
- Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Christina Janko
- 1] Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany. [2] Department of Otorhinolaryngology, Head and Neck Surgery, Section for Experimental Oncology and Nanomedicine (SEON), University Hospital Erlangen, Erlangen, Germany
| | - Luis E Munoz
- Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Yi Zhao
- 1] Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany. [2] Department of Rheumatology and Immunology, West China Hospital, Sichuan University, Chengdu, China
| | - Deborah Kienhöfer
- Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Benjamin Frey
- Department of Radiation Oncology, University Hospital Erlangen, Erlangen, Germany
| | - Michael Lell
- Department of Radiology, Friedrich-Alexander University of Erlangen-Nuremberg, Erlangen, Germany
| | - Bernhard Manger
- Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Jürgen Rech
- Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Elisabeth Naschberger
- Division of Molecular and Experimental Surgery, Department of Surgery, University of Erlangen Medical Center, Erlangen, Germany
| | - Rikard Holmdahl
- Division of Medical Inflammation Research, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm, Sweden
| | - Veit Krenn
- Department of Pathology, MVZ of Pathology, Trier, Germany
| | - Thomas Harrer
- Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Ivica Jeremic
- 1] Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany. [2] Institute of Rheumatology, School of Medicine, University of Belgrade, Belgrade, Serbia
| | - Rostyslav Bilyy
- Institute of Cell Biology, National Academy of Sciences of Ukraine, Lviv, Ukraine
| | - Georg Schett
- Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Markus Hoffmann
- Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany
| | - Martin Herrmann
- Department of Internal Medicine 3, University of Erlangen-Nuremberg, Erlangen, Germany
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Simard JC, Cesaro A, Chapeton-Montes J, Tardif M, Antoine F, Girard D, Tessier PA. S100A8 and S100A9 induce cytokine expression and regulate the NLRP3 inflammasome via ROS-dependent activation of NF-κB(1.). PLoS One 2013; 8:e72138. [PMID: 23977231 PMCID: PMC3747084 DOI: 10.1371/journal.pone.0072138] [Citation(s) in RCA: 190] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 07/06/2013] [Indexed: 01/17/2023] Open
Abstract
S100A8 and S100A9 are cytoplasmic proteins expressed by phagocytes. High concentrations of these proteins have been correlated with various inflammatory conditions, including autoimmune diseases such as rheumatoid arthritis and Crohn's disease, as well as autoinflammatory diseases. In the present study, we examined the effects of S100A8 and S100A9 on the secretion of cytokines and chemokines from PBMCs. S100A8 and S100A9 induced the secretion of cytokines such as IL-6, IL-8, and IL-1β. This secretion was associated with the activation and translocation of the transcription factor NF-κB. Inhibition studies using antisense RNA and the pharmacological agent BAY-117082 confirmed the involvement of NF-κB in IL-6, IL-8, and IL-1β secretion. S100A8- and S100A9-mediated activation of NF-κB, the NLR family, pyrin domain-containing 3 (NLRP3) protein, and pro-IL-1β expression was dependent on the generation of reactive oxygen species. This effect was synergistically enhanced by ATP, a known inflammasome activator. These results suggest that S100A8 and S100A9 enhance the inflammatory response by inducing cytokine secretion of PBMCs.
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Affiliation(s)
- Jean-Christophe Simard
- Laboratoire de Recherche en Inflammation des Granulocytes, Université du Québec Institut National de la Recherche Scientifique, Institut Armand-Frappier, Laval, Québec, Canada
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Calprotectin in rheumatoid arthritis : association with disease activity in a cross-sectional and a longitudinal cohort. Mol Diagn Ther 2013; 17:49-56. [PMID: 23329363 DOI: 10.1007/s40291-013-0016-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Calprotectin is potentially a more sensitive biomarker of disease activity in rheumatoid arthritis (RA) than conventional acute-phase proteins such as the erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) because it directly reflects inflammation in the synovium and synovial fluid rather than systemic inflammatory activity. OBJECTIVE The aim of this study was to evaluate relationships between serum calprotectin levels, disease activity, and response to treatment. Calprotectin was also investigated as a predictive marker of clinical response. METHODS This observational study included selected cohorts of patients with RA treated at La Paz University Hospital, Madrid, Spain. Associations between serum calprotectin levels and clinical and laboratory parameters were analyzed in a cross-sectional cohort of 60 patients with varying disease activity, and changes in calprotectin levels in response to treatment with infliximab were analyzed at baseline and after 3 and 6 months of treatment in a longitudinal cohort of 20 patients with very active disease. RESULTS In the cross-sectional cohort, calprotectin levels correlated with rheumatoid factor levels (r = 0.25; p < 0.05) but not with titers of antibodies to cyclic citrullinated peptide. Significant correlations were also observed between calprotectin levels and the 28 swollen joint count (28-SJC), Disease Activity Score based on a 28-joint count (DAS28), Simplified Disease Activity Index (SDAI), ESR, and CRP levels. In the longitudinal cohort, calprotectin levels at baseline were not predictive of response to treatment but significantly decreased during treatment in responders (p < 0.0001). CONCLUSION Calprotectin levels strongly correlate with clinical and laboratory assessments of joint inflammation and also decrease in response to treatment, indicating that calprotectin is a promising marker for assessment and monitoring of disease activity in patients with RA. Investigations are required to further evaluate its diagnostic, prognostic, and therapeutic potential.
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Geering B, Stoeckle C, Conus S, Simon HU. Living and dying for inflammation: neutrophils, eosinophils, basophils. Trends Immunol 2013; 34:398-409. [PMID: 23665135 DOI: 10.1016/j.it.2013.04.002] [Citation(s) in RCA: 178] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 03/22/2013] [Accepted: 04/05/2013] [Indexed: 12/15/2022]
Abstract
Neutrophils, eosinophils, and basophils play essential roles during microbe-induced and sterile inflammation. The severity of such inflammatory processes is controlled, at least in part, by factors that regulate cell death and survival of granulocytes. In recent years, major progress has been made in understanding the molecular mechanisms of granulocyte cell death and in identifying novel damage- and pathogen-associated molecular patterns as well as regulatory cytokines impacting granulocyte viability. Furthermore, an increased interest in innate immunity has boosted our overall understanding of granulocyte biology. In this review, we describe and compare factors and mechanisms regulating neutrophil, eosinophil, and basophil lifespan. Because dysregulation of death pathways in granulocytes can contribute to inflammation-associated immunopathology, targeting granulocyte lifespan could be therapeutically promising.
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Affiliation(s)
- Barbara Geering
- Institute of Pharmacology, University of Bern, Friedbuehlstrasse 49, CH-3010 Bern, Switzerland
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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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Gout as autoinflammatory disease: New mechanisms for more appropriated treatment targets. Autoimmun Rev 2012; 12:66-71. [DOI: 10.1016/j.autrev.2012.07.024] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Cesaro A, Anceriz N, Plante A, Pagé N, Tardif MR, Tessier PA. An inflammation loop orchestrated by S100A9 and calprotectin is critical for development of arthritis. PLoS One 2012; 7:e45478. [PMID: 23029038 PMCID: PMC3445527 DOI: 10.1371/journal.pone.0045478] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Accepted: 08/21/2012] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE The S100A9 and S100A8 proteins are highly expressed by neutrophils and monocytes and are part of a group of damage-associated molecular pattern molecules that trigger inflammatory responses. Sera and synovial fluids of patients with rheumatoid arthritis (RA) contain high concentrations of S100A8/A9 that correlate with disease activity. METHODS In this study, we investigated the importance of S100A9 in RA by using neutralizing antibodies in a murine lipopolysaccharide-synchronized collagen-induced arthritis model. We also used an in vitro model of stimulation of human immune cells to decipher the role played by S100A9 in leukocyte migration and pro-inflammatory cytokine secretion. RESULTS Treatment with anti-S100A9 antibodies improved the clinical score by 50%, diminished immune cell infiltration, reduced inflammatory cytokines, both in serum and in the joints, and preserved bone/collagen integrity. Stimulation of neutrophils with S100A9 protein led to the enhancement of neutrophil transendothelial migration. S100A9 protein also induced the secretion by monocytes of proinflammatory cytokines like TNFα, IL-1β and IL-6, and of chemokines like MIP-1α and MCP-1. CONCLUSION The effects of anti-S100A9 treatment are likely direct consequences of inhibiting the S100A9-mediated promotion of neutrophil transmigration and secretion of pro-inflammatory cytokines from monocytes. Collectively, our results show that treatment with anti-S100A9 may inhibit amplification of the immune response and help preserve tissue integrity. Therefore, S100A9 is a promising potential therapeutic target for inflammatory diseases like rheumatoid arthritis for which alternative therapeutic strategies are needed.
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Affiliation(s)
- Annabelle Cesaro
- Centre de recherche en Infectiologie, Centre de recherche du Centre Hospitalier Universitaire de Quebec, and Faculty of Medecine, Université Laval, Quebec, Canada
| | - Nadia Anceriz
- Centre de recherche en Infectiologie, Centre de recherche du Centre Hospitalier Universitaire de Quebec, and Faculty of Medecine, Université Laval, Quebec, Canada
| | - Audrey Plante
- Centre de recherche en Infectiologie, Centre de recherche du Centre Hospitalier Universitaire de Quebec, and Faculty of Medecine, Université Laval, Quebec, Canada
| | - Nathalie Pagé
- Centre de recherche en Infectiologie, Centre de recherche du Centre Hospitalier Universitaire de Quebec, and Faculty of Medecine, Université Laval, Quebec, Canada
| | - Mélanie R. Tardif
- Centre de recherche en Infectiologie, Centre de recherche du Centre Hospitalier Universitaire de Quebec, and Faculty of Medecine, Université Laval, Quebec, Canada
| | - Philippe A. Tessier
- Centre de recherche en Infectiologie, Centre de recherche du Centre Hospitalier Universitaire de Quebec, and Faculty of Medecine, Université Laval, Quebec, Canada
- * E-mail:
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Atallah M, Krispin A, Trahtemberg U, Ben-Hamron S, Grau A, Verbovetski I, Mevorach D. Constitutive neutrophil apoptosis: regulation by cell concentration via S100 A8/9 and the MEK-ERK pathway. PLoS One 2012; 7:e29333. [PMID: 22363402 PMCID: PMC3281816 DOI: 10.1371/journal.pone.0029333] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Accepted: 11/25/2011] [Indexed: 01/16/2023] Open
Abstract
Programmed cell death (PCD) is a fundamental mechanism in tissue and cell homeostasis. It was long suggested that apoptosis regulates the cell number in diverse cell populations; however no clear mechanism was shown. Neutrophils are the short-lived, first-line defense of innate immunity, with an estimated t = 1/2 of 8 hours and a high turnover rate. Here we first show that spontaneous neutrophil constitutive PCD is regulated by cell concentrations. Using a proteomic approach, we identified the S100 A8/9 complex, which constitutes roughly 40% of cytosolic protein in neutrophils, as mediating this effect. We further demonstrate that it regulates cell survival via a signaling mechanism involving MEK-ERK via TLR4 and CD11B/CD18. This mechanism is suggested to have a fine-tuning role in regulating the neutrophil number in bone marrow, peripheral blood, and inflammatory sites.
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Affiliation(s)
- Mizhir Atallah
- The Laboratory for Cellular and Molecular Immunology, Department of Medicine, Hadassah-Hebrew University Medical Center Jerusalem, Jerusalem, Israel
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Spijkers-Hagelstein JAP, Schneider P, Hulleman E, de Boer J, Williams O, Pieters R, Stam RW. Elevated S100A8/S100A9 expression causes glucocorticoid resistance in MLL-rearranged infant acute lymphoblastic leukemia. Leukemia 2012; 26:1255-65. [PMID: 22282267 DOI: 10.1038/leu.2011.388] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
MLL-rearranged acute lymphoblastic leukemia (ALL) in infants is characterized by a poor clinical outcome and resistance to glucocorticoids (for example, prednisone and dexamethasone). As both the response to prednisolone in vitro and prednisone in vivo are predictive for clinical outcome, understanding and overcoming glucocorticoid resistance remains an essential step towards improving prognosis. Prednisolone-induced apoptosis depends on glucocorticoid-evoked Ca(2+) fluxes from the endoplasmic reticulum towards the mitochondria. Here, we demonstrate that in MLL-rearranged infant ALL, over-expression of S100A8 and S100A9 is associated with failure to induce free-cytosolic Ca(2+) and prednisolone resistance. Furthermore, we demonstrate that enforced expression of S100A8/S100A9 in prednisolone-sensitive MLL-rearranged ALL cells, rapidly leads to prednisolone resistance as a result of S100A8/S100A9 mediated suppression of prednisolone-induced free-cytosolic Ca(2+) levels. In addition, the Src kinase inhibitor PP2 markedly sensitized MLL-rearranged ALL cells otherwise resistant to prednisolone, via downregulation of S100A8 and S100A9, which allowed prednisolone-induced Ca(2+) fluxes to reach the mitochondria and trigger apoptosis. On the basis of this novel mechanism of prednisolone resistance, we propose that developing more specific S100A8/S100A9 inhibitors may well be beneficial for prednisolone-resistant MLL-rearranged infant ALL patients.
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Affiliation(s)
- J A P Spijkers-Hagelstein
- Department of Pediatric Oncology/Hematology, Erasmus Medical Center / Sophia Children's Hospital, Zuid-Holland, The Netherlands
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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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Fortin CF, Cloutier A, Ear T, Sylvain-Prévost S, Mayer TZ, Bouchelaghem R, McDonald PP. A class IA PI3K controls inflammatory cytokine production in human neutrophils. Eur J Immunol 2011; 41:1709-19. [DOI: 10.1002/eji.201040945] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Revised: 02/15/2011] [Accepted: 03/11/2011] [Indexed: 12/30/2022]
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Santegoets KCM, van Bon L, van den Berg WB, Wenink MH, Radstake TRDJ. Toll-like receptors in rheumatic diseases: are we paying a high price for our defense against bugs? FEBS Lett 2011; 585:3660-6. [PMID: 21513712 DOI: 10.1016/j.febslet.2011.04.028] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Revised: 04/11/2011] [Accepted: 04/12/2011] [Indexed: 12/31/2022]
Abstract
In the last decade Toll-like receptor (TLR) research has led to new insights in the pathogenesis of many rheumatic diseases. In autoimmune diseases like systemic lupus erythematosus, rheumatoid arthritis and systemic sclerosis TLR signaling is likely to be involved in tolerance breakthrough and chronic inflammation via combined Fc gamma receptors and TLR recognition of immune complexes. Furthermore, inflammatory diseases like psoriatic arthritis and gout also show more and more evidence for TLR involvement. In this review we will discuss the involvement of TLR signaling in several rheumatic diseases and stress their similarities and differences based on recent findings.
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Affiliation(s)
- K C M Santegoets
- Department of Rheumatology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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Koike A, Arai S, Yamada S, Nagae A, Saita N, Itoh H, Uemoto S, Totani M, Ikemoto M. Dynamic Mobility of Immunological Cells Expressing S100A8 and S100A9 in vivo: A Variety of Functional Roles of the two Proteins as Regulators in Acute Inflammatory Reaction. Inflammation 2011; 35:409-19. [DOI: 10.1007/s10753-011-9330-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Dangerous attraction: phagocyte recruitment and danger signals of apoptotic and necrotic cells. Apoptosis 2010; 15:1007-28. [PMID: 20157780 DOI: 10.1007/s10495-010-0472-1] [Citation(s) in RCA: 95] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Tissue homeostasis in metazoa requires the rapid and efficient clearance of dying cells by professional or semi-professional phagocytes. Impairment of this finely regulated, fundamental process has been implicated in the development of autoimmune diseases, such as systemic lupus erythematosus. Various studies have provided us a detailed understanding of the interaction between dying cells and phagocytes as well as the current concept that apoptotic cell removal leads to a non- or anti-inflammatory response, whereas necrotic cell removal stimulates a pro-inflammatory reaction. In contrast, our knowledge about the soluble factors released from dying cells is rather limited, although meanwhile it is generally accepted that not only the dying cell itself but also the substances liberated during cell death contribute to the process of corpse clearance and the subsequent immune response. This review article is intended as an up-to-date survey over attraction and danger signals of apoptotic, primary and secondary necrotic cells, their function as chemoattractants in phagocyte recruitment, additional effects on the immune system, and the receptors, which are engaged in this scenario.
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Dubchak N, Falasca GF. New and improved strategies for the treatment of gout. Int J Nephrol Renovasc Dis 2010; 3:145-66. [PMID: 21694941 PMCID: PMC3108771 DOI: 10.2147/ijnrd.s6048] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Indexed: 12/16/2022] Open
Abstract
The Western world appears to be in the midst of the third great gout epidemic of all time. In this century, gout is increasing in prevalence despite an increased understanding of its risk factors and pathophysiology, and the availability of reasonably effective treatment. The main cultural factors responsible for this appear to be diet, obesity, ethanol use and medications. Excess fructose consumption is a newly recognized modifiable risk factor. The debate has been renewed concerning hyperuricemia as an independent risk factor for renal insufficiency and cardiovascular disease. Prevention is still rooted in lifestyle choices. Existing treatments have proven to be unsatisfactory in many patients with comorbidities. New treatments are available today and on the horizon for tomorrow, which offer a better quality of life for gout sufferers. These include febuxostat, a nonpurine inhibitor of xanthine oxidase with a potentially better combination of efficacy and safety than allopurinol, and investigational inhibitors of URAT-1, an anion exchanger in the proximal tubule that is critical for uric acid homeostasis. New abortive treatments include interleukin-1 antagonists that can cut short the acute attack in 1 to 2 days in persons who cannot take nonsteroidal anti-inflammatory drugs, colchicine or corticosteroids. Lastly, newer formulations of uricase have the ability to dissolve destructive tophi over weeks or months in patients who cannot use currently available hypouricemic agents. Diagnostically, ultrasound and magnetic resonance imaging offer advanced ways to diagnose gout noninvasively, and just as importantly, a way to follow the progress of tophus dissolution. The close association of hyperuricemia with metabolic syndrome, hypertension and renal insufficiency ensures that nephrologists will see increasing numbers of gout-afflicted patients.
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Affiliation(s)
- Natalie Dubchak
- Division of Rheumatology, Cooper University Hospital, UMDNJ – Robert Wood Johnson Medical School at Camden, Camden, NJ, USA
| | - Gerald F Falasca
- Division of Rheumatology, Cooper University Hospital, UMDNJ – Robert Wood Johnson Medical School at Camden, Camden, NJ, USA
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Hoffman HM, Scott P, Mueller JL, Misaghi A, Stevens S, Yancopoulos GD, Murphy A, Valenzuela DM, Liu-Bryan R. Role of the leucine-rich repeat domain of cryopyrin/NALP3 in monosodium urate crystal-induced inflammation in mice. ACTA ACUST UNITED AC 2010; 62:2170-9. [PMID: 20506351 DOI: 10.1002/art.27456] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
OBJECTIVE The mechanism by which monosodium urate monohydrate (MSU) crystals intracellularly activate the cryopyrin inflammasome is unknown. The aim of this study was to use a mouse molecular genetics-based approach to test whether the leucine-rich repeat (LRR) domain of cryopyrin is required for MSU crystal-induced inflammation. METHODS Cryopyrin-knockout lacZ (Cryo(-Z/-Z)) mice and mice with the cryopyrin LRR domain deleted and fused to the lacZ reporter (Cryo(DeltaLRR Z/DeltaLRR Z)) were generated using bacterial artificial chromosome-based targeting vectors, which allow for large genomic deletions. Bone marrow-derived macrophages from Cryo(DeltaLRR Z/DeltaLRR Z) mice, Cryo(-Z/-Z) mice, and congenic wild-type (WT) mice were challenged with endotoxin-free MSU crystals under serum-free conditions. Phagocytosis and cytokine expression were assessed by flow cytometry and enzyme-linked immunosorbent assay. MSU crystals also were injected into mouse synovial-like subcutaneous air pouches. The in vivo inflammatory responses were examined. RESULTS Release of interleukin-1beta (IL-1beta), but not CXCL1 and tumor necrosis factor alpha, was impaired in Cryo(DeltaLRR Z/DeltaLRR Z) and Cryo(-Z/-Z) mouse bone marrow-derived macrophages compared with WT mouse bone marrow-derived macrophages in response to not only MSU crystals but also other known stimuli that activate the cryopyrin inflammasome. In addition, a comparable percentage of MSU crystals taken up by each type of bone marrow-derived macrophage was observed. Moreover, total leukocyte infiltration in the air pouch and IL-1beta production were attenuated in Cryo(-Z/-Z) and Cryo(DeltaLRR Z/DeltaLRR Z) mice at 6 hours postinjection of MSU crystals compared with WT mice. CONCLUSION MSU crystal-induced inflammatory responses were comparably attenuated both in vitro and in vivo in Cryo(DeltaLRR Z/DeltaLRR Z) and Cryo(-Z/-Z) mice. Hence, the LRR domain of cryopyrin plays a role in mediating MSU crystal-induced inflammation in this model.
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Sroussi HY, Lu Y, Zhang QL, Villines D, Marucha PT. S100A8 and S100A9 inhibit neutrophil oxidative metabolism in-vitro: involvement of adenosine metabolites. Free Radic Res 2010; 44:389-96. [PMID: 20166886 DOI: 10.3109/10715760903431434] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Neutrophils are short-lived granulocytic cells of the innate immune system specialized in the production of reactive oxygen species. S100A8 and S100A9 and their heterocomplex calprotectin play a role in neutrophil recruitment and represent 40% of neutrophil cytosolic protein weight. The present study was designed to test the effect of S100A8 and S100A9 on the rate of neutrophil oxidative metabolism. It is hypothesized that the two S100 proteins inhibit neutrophil associated oxidation. Granulocytes freshly isolated from healthy volunteers were tested for their ability to oxidize dichlorofluorescindiacetate (DCFH-DA) in-vitro. The data showed that S100A8 and S100A9 inhibited spontaneous and stimulated oxidation of the DCFH-DA probe by neutrophils. The inhibition of neutrophil oxidative metabolism by S100A8 and S100A9 was markedly reduced by the enzymatic activity of adenosine deaminase. Inhibitors of the P1 adenosine receptors also reduced the anti-oxidative effect of S100A8/A9 providing further support for the involvement of adenosine metabolites in S100A8/ A9 anti-oxidative effect.
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Affiliation(s)
- Herve Y Sroussi
- Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, University of Illinois at Chicago, Chicago, IL 60612-7213, USA.
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