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Mao X, Shi M, Zhang B, Fu R, Cai M, Yu S, Lin K, Zhang C, Li D, Chen G, Luo W. Integration of single-cell and bulk RNA sequencing revealed immune heterogeneity and its association with disease activity in rheumatoid arthritis patients. Immunol Res 2024:10.1007/s12026-024-09513-5. [PMID: 39009881 DOI: 10.1007/s12026-024-09513-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Accepted: 06/27/2024] [Indexed: 07/17/2024]
Abstract
Rheumatoid arthritis (RA) is a chronic, inflammatory, systemic autoimmune disease characterized by cartilage, bone damage, synovial inflammation, hyperplasia, autoantibody production, and systemic features. To obtain an overall profile of the immune environment in RA patients and its association with clinical features, we performed single-cell transcriptome and T-cell receptor sequencing of mononuclear cells from peripheral blood (PBMC) and synovial fluid (SF) from RA patients, integrated with two large cohorts with bulk RNA sequencing for further validation and investigation. Dendritic cells (DCs) exhibited relatively high functional heterogeneity and tissue specificity in relation to both antigen presentation and proinflammatory functions. Peripheral helper T cells (TPHs) are likely to originate from synovial tissue, undergo activation and exhaustion, and are subsequently released into the peripheral blood. Notably, among all immune cell types, TPHs were found to have the most intense associations with disease activity. In addition, CD8 effector T cells could be clustered into two groups with different cytokine expressions and play distinct roles in RA development. By integrating single-cell data with bulk sequencing from two large cohorts, we identified interactions among TPHs, CD8 cells, CD16 monocytes, and DCs that strongly contribute to the proinflammatory local environment in RA joints. Of note, the swollen 28-joint counts exhibited a more pronounced association with this immune environment compared to other disease activity indexes. The immune environment alternated significantly from PBMCs to SF, which indicated that a series of immune cells was involved in proinflammatory responses in the local joints of RA patients. By integrating single-cell data with two large cohorts, we have uncovered associations between specific immune cell populations and clinical features. This integration provides a rapid and precise methodology for assessing local immune activation, offering valuable insights into the pathophysiological mechanisms at play in RA.
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Affiliation(s)
- Xiaofan Mao
- Institute of Translational Medicine, The First People's Hospital of Foshan, Foshan, China
| | - Maohua Shi
- Department of Rheumatology, The First People's Hospital of Foshan, Foshan, China
| | - Beiying Zhang
- Institute of Translational Medicine, The First People's Hospital of Foshan, Foshan, China
| | - Rongdang Fu
- Department of Hepatology, The First People's Hospital of Foshan, Foshan, China
| | - Mengyun Cai
- Institute of Translational Medicine, The First People's Hospital of Foshan, Foshan, China
| | - Sifei Yu
- Institute of Translational Medicine, The First People's Hospital of Foshan, Foshan, China
| | - Kairong Lin
- Institute of Translational Medicine, The First People's Hospital of Foshan, Foshan, China
| | - Chuling Zhang
- Institute of Translational Medicine, The First People's Hospital of Foshan, Foshan, China
| | - Dingru Li
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Guoqiang Chen
- Department of Rheumatology, The First People's Hospital of Foshan, Foshan, China.
| | - Wei Luo
- Institute of Translational Medicine, The First People's Hospital of Foshan, Foshan, China.
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2
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Shu Q, Zhang N, Liu Y, Wang X, Chen J, Xie H, Pan F, Zhao L, Ding X, Wen Y, Wang L, Xie W, Lu J, Su G, Peng H, Yang P. IL-8 Triggers Neutrophil Extracellular Trap Formation Through an Nicotinamide Adenine Dinucleotide Phosphate Oxidase- and Mitogen-Activated Protein Kinase Pathway-Dependent Mechanism in Uveitis. Invest Ophthalmol Vis Sci 2023; 64:19. [PMID: 37824136 PMCID: PMC10587853 DOI: 10.1167/iovs.64.13.19] [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: 12/04/2022] [Accepted: 09/12/2023] [Indexed: 10/13/2023] Open
Abstract
Purpose To explore the mechanism underlying IL-8-induced neutrophil extracellular trap (NET) formation in patients with ocular-active Behçet's disease (BD) and the effect of inhibiting NET formation on the severity of inflammation in experimental autoimmune uveitis (EAU) mice. Methods The serum extracellular DNA and neutrophil elastase (NE) and IL-8 levels in patients with ocular-active BD, the expression of myeloperoxidase, NE, and histone H3Cit in IL-8-induced neutrophils isolated from healthy controls, and the effects of NETs on HMC3 cells were detected. Female C57BL/6J mice were immunized with IRBP651-670 to induce EAU and EAU mice received intravitreal injection of the CXCR2 (IL-8 receptor) antagonist SB225002 or PBS. The serum levels of extracellular DNA, NE, and keratinocyte-derived chemokine (the mouse ortholog of human IL-8) and expression of myeloperoxidase, NE, and histone H3Cit in mouse retinas were detected. Disease severity was evaluated by clinical and histopathological scores. Results Serum keratinocyte-derived chemokine expression levels in EAU mice and IL-8 expression levels in patients with ocular-active BD increased. IL-8 notably increased NET formation in a dose-dependent manner through an nicotinamide adenine dinucleotide phosphate oxidase and mitogen-activated protein kinase pathway dependent mechanism. IL-8-induced NET formation damaged HMC3 cells in vitro. Pretreatment with SB225002 notably ameliorated the production of NETs in EAU mice. Conclusions Our data confirm that NET formation is induced by IL-8. IL-8-induced NET formation was found to be related to mitogen-activated protein kinase and nicotinamide adenine dinucleotide phosphate pathways. Pretreatment with the CXCR2 antagonist SB225002 alleviated neutrophil infiltration and suppressed NET formation in EAU mice.
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Affiliation(s)
- Qinxin Shu
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Ni Zhang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Yanyao Liu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Xing Wang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Jinquan Chen
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Hao Xie
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Fuying Pan
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Long Zhao
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Xuanheng Ding
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Yan Wen
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Lingda Wang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Wenxi Xie
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Jing Lu
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Guannan Su
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Hui Peng
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
| | - Peizeng Yang
- The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Ophthalmology, Chongqing Eye Institute, Chongqing Branch (Municipality Division) of National Clinical Research Center for Ocular Diseases, Chongqing, China
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Singh J, Minz RW, Saikia B, Nada R, Sharma A, Jha S, Anand S, Rathi M, D'Cruz S. Diminished PD-L1 regulation along with dysregulated T lymphocyte subsets and chemokine in ANCA-associated vasculitis. Clin Exp Med 2023; 23:1801-1813. [PMID: 36219364 DOI: 10.1007/s10238-022-00908-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 09/29/2022] [Indexed: 11/03/2022]
Abstract
ANCA-associated vasculitis (AAV) is a life-threatening disease characterized by small vessel inflammation and pathogenic self-directed antibodies. Programmed death-ligand 1 receptor (PD-1) and programmed cell death ligand-1 (PD-L1) are immune checkpoint molecules crucial for maintaining tolerance and immune homeostasis. After checkpoint inhibition therapy, development of various autoimmune diseases and immune-related adverse events (irAEs) have been observed. Here, we investigated the immunomodulatory roles of neutrophils through the expression of immune checkpoint molecule (PD-L1), migratory molecules (CXCR2), chemotactic chemokines (CXCL5) and other important molecules (BAFF and HMGB1) in development of AAV. We also scrutinized the immune mechanism responsible for development of pauci-immune crescentic GN (PICGN). We demonstrate for the first time that the frequency of PD-L1 expressing neutrophils was significantly reduced in AAV patients compared to healthy controls and correlated negatively with disease severity (BVASv3). Further, in renal biopsy, reduced PD-L1 immune checkpoint expression provides a microenvironment that unleashes uncontrolled activated CD4 + T cells, B cells, neutrophils and macrophages and ultimately causes engulfment of immune complexes leading to PICGN. Furthermore, during remission, reduced neutrophils PD-L1 and CXCR2 expression, increased neutrophils CXCL5 expression and increased peripheral effector memory T cells and increased HMGB1 and BAFF levels in serum, demonstrate the propensity for the persistence of sub-clinical inflammation, which could explain relapse, in this group of diseases.
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Affiliation(s)
- Jagdeep Singh
- Department of Immunopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Ranjana Walker Minz
- Department of Immunopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India.
| | - Biman Saikia
- Department of Immunopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Ritambhra Nada
- Department of Histopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Aman Sharma
- Department of Internal Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Saket Jha
- Department of Internal Medicine, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Shashi Anand
- Department of Immunopathology, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Manish Rathi
- Department of Nephrology, Postgraduate Institute of Medical Education and Research, Chandigarh, 160012, India
| | - Sanjay D'Cruz
- Department of General Medicine, Government Medical College and Hospital, Chandigarh, 160030, India
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4
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Zhang D, Zhao MM, Wu JM, Wang R, Xue G, Xue YB, Shao JQ, Zhang YY, Dong ED, Li ZY, Xiao H. Dual-omics reveals temporal differences in acute sympathetic stress-induced cardiac inflammation following α 1 and β-adrenergic receptors activation. Acta Pharmacol Sin 2023; 44:1350-1365. [PMID: 36737635 PMCID: PMC10310713 DOI: 10.1038/s41401-022-01048-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 12/28/2022] [Indexed: 02/05/2023] Open
Abstract
Sympathetic stress is prevalent in cardiovascular diseases. Sympathetic overactivation under strong acute stresses triggers acute cardiovascular events including myocardial infarction (MI), sudden cardiac death, and stress cardiomyopathy. α1-ARs and β-ARs, two dominant subtypes of adrenergic receptors in the heart, play a significant role in the physiological and pathologic regulation of these processes. However, little is known about the functional similarities and differences between α1- and β-ARs activated temporal responses in stress-induced cardiac pathology. In this work, we systematically compared the cardiac temporal genome-wide profiles of acute α1-AR and β-AR activation in the mice model by integrating transcriptome and proteome. We found that α1- and β-AR activations induced sustained and transient inflammatory gene expression, respectively. Particularly, the overactivation of α1-AR but not β-AR led to neutrophil infiltration at one day, which was closely associated with the up-regulation of chemokines, activation of NF-κB pathway, and sustained inflammatory response. Furthermore, there are more metabolic disorders under α1-AR overactivation compared with β-AR overactivation. These findings provide a new therapeutic strategy that, besides using β-blocker as soon as possible, blocking α1-AR within one day should also be considered in the treatment of acute stress-associated cardiovascular diseases.
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Affiliation(s)
- Di Zhang
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Ming-Ming Zhao
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research; Haihe Laboratory of Cell Ecosystem, Beijing, 100191, China
| | - Ji-Min Wu
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research; Haihe Laboratory of Cell Ecosystem, Beijing, 100191, China
| | - Rui Wang
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research; Haihe Laboratory of Cell Ecosystem, Beijing, 100191, China
| | - Gang Xue
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Yan-Bo Xue
- Department of Cardiovascular Medicine, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China
| | - Ji-Qi Shao
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - You-Yi Zhang
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research; Haihe Laboratory of Cell Ecosystem, Beijing, 100191, China
| | - Er-Dan Dong
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research; Haihe Laboratory of Cell Ecosystem, Beijing, 100191, China.
| | - Zhi-Yuan Li
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China.
- Peking-Tsinghua Center for Life Sciences, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China.
| | - Han Xiao
- Department of Cardiology and Institute of Vascular Medicine, Peking University Third Hospital; NHC Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides; Key Laboratory of Molecular Cardiovascular Science, Ministry of Education; Beijing Key Laboratory of Cardiovascular Receptors Research; Haihe Laboratory of Cell Ecosystem, Beijing, 100191, China.
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5
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Modulation of Beta-Amyloid-Activated Primary Human Neutrophils by Dietary Phenols from Virgin Olive Oil. Nutrients 2023; 15:nu15040941. [PMID: 36839300 PMCID: PMC9959767 DOI: 10.3390/nu15040941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
The defense mechanism against harmful stimuli is inflammation. Indeed, neurodegenerative disorders can arise as a result of a persistent neuroinflammation. Beta-amyloid (Aβ1-42) is an early trigger in the origination of Alzheimer's disease, leading to synaptic and cognitive impairments. Virgin olive oil (VOO) is correlated with a decreased risk of developing immune-inflammatory disorders, but the potential effects of the phenolic fraction (PF) from VOO in the modulation of neuroinflammatory processes in neutrophils remain unknown. In this study, we investigated the ability of the PF to modulate the activation of Aβ1-42-stimulated primary human neutrophils, focusing on the expression of gene and surface markers and the release of pro-inflammatory and chemoattractant mediators. Down-regulation of pro-inflammatory cytokine gene expression in Aβ1-42-treated neutrophils, among other changes, was reported. Furthermore, pretreatment with PF prevented neutrophil activation. The beneficial effects in the modulation of inflammatory responses show the relevance of VOO to achieve a healthier diet that can help prevent inflammatory diseases.
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Chlastáková A, Kaščáková B, Kotál J, Langhansová H, Kotsyfakis M, Kutá Smatanová I, Tirloni L, Chmelař J. Iripin-1, a new anti-inflammatory tick serpin, inhibits leukocyte recruitment in vivo while altering the levels of chemokines and adhesion molecules. Front Immunol 2023; 14:1116324. [PMID: 36756125 PMCID: PMC9901544 DOI: 10.3389/fimmu.2023.1116324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 01/09/2023] [Indexed: 01/25/2023] Open
Abstract
Serpins are widely distributed and functionally diverse inhibitors of serine proteases. Ticks secrete serpins with anti-coagulation, anti-inflammatory, and immunomodulatory activities via their saliva into the feeding cavity to modulate host's hemostatic and immune reaction initiated by the insertion of tick's mouthparts into skin. The suppression of the host's immune response not only allows ticks to feed on a host for several days but also creates favorable conditions for the transmission of tick-borne pathogens. Herein we present the functional and structural characterization of Iripin-1 (Ixodes ricinus serpin-1), whose expression was detected in the salivary glands of the tick Ixodes ricinus, a European vector of tick-borne encephalitis and Lyme disease. Of 16 selected serine proteases, Iripin-1 inhibited primarily trypsin and further exhibited weaker inhibitory activity against kallikrein, matriptase, and plasmin. In the mouse model of acute peritonitis, Iripin-1 enhanced the production of the anti-inflammatory cytokine IL-10 and chemokines involved in neutrophil and monocyte recruitment, including MCP-1/CCL2, a potent histamine-releasing factor. Despite increased chemokine levels, the migration of neutrophils and monocytes to inflamed peritoneal cavities was significantly attenuated following Iripin-1 administration. Based on the results of in vitro experiments, immune cell recruitment might be inhibited due to Iripin-1-mediated reduction of the expression of chemokine receptors in neutrophils and adhesion molecules in endothelial cells. Decreased activity of serine proteases in the presence of Iripin-1 could further impede cell migration to the site of inflammation. Finally, we determined the tertiary structure of native Iripin-1 at 2.10 Å resolution by employing the X-ray crystallography technique. In conclusion, our data indicate that Iripin-1 facilitates I. ricinus feeding by attenuating the host's inflammatory response at the tick attachment site.
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Affiliation(s)
- Adéla Chlastáková
- Department of Medical Biology, Faculty of Science, University of South Bohemia in České Budějovice, České Budějovice, Czechia,Laboratory of Molecular Biology of Ticks, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czechia
| | - Barbora Kaščáková
- Laboratory of Structural Chemistry, Institute of Chemistry, Faculty of Science, University of South Bohemia in České Budějovice, České Budějovice, Czechia
| | - Jan Kotál
- Tick-Pathogen Transmission Unit, Laboratory of Bacteriology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, Hamilton, MT, United States
| | - Helena Langhansová
- Department of Medical Biology, Faculty of Science, University of South Bohemia in České Budějovice, České Budějovice, Czechia
| | - Michail Kotsyfakis
- Laboratory of Genomics and Proteomics of Disease Vectors, Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czechia
| | - Ivana Kutá Smatanová
- Laboratory of Structural Chemistry, Institute of Chemistry, Faculty of Science, University of South Bohemia in České Budějovice, České Budějovice, Czechia
| | - Lucas Tirloni
- Tick-Pathogen Transmission Unit, Laboratory of Bacteriology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, Hamilton, MT, United States
| | - Jindřich Chmelař
- Department of Medical Biology, Faculty of Science, University of South Bohemia in České Budějovice, České Budějovice, Czechia,*Correspondence: Jindřich Chmelař,
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7
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Liu P, Wang X, Yang Q, Yan X, Fan Y, Zhang S, Wei Y, Huang M, Jiang L, Feng L. Collaborative Action of Microglia and Astrocytes Mediates Neutrophil Recruitment to the CNS to Defend against Escherichia coli K1 Infection. Int J Mol Sci 2022; 23:ijms23126540. [PMID: 35742984 PMCID: PMC9223767 DOI: 10.3390/ijms23126540] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/10/2022] [Accepted: 06/10/2022] [Indexed: 02/04/2023] Open
Abstract
Escherichia coli K1 is a leading cause of neonatal bacterial meningitis. Recruitment of neutrophils to the central nervous system (CNS) via local immune response plays a critical role in defense against E. coli K1 infection; however, the mechanism underlying this recruitment remains unclear. In this study, we report that microglia and astrocytes are activated in response to stimulation by E. coli K1 and/or E. coli K1-derived outer membrane vesicles (OMVs) and work collaboratively to drive neutrophil recruitment to the CNS. Microglial activation results in the release of the pro-inflammatory cytokine TNF-α, which activates astrocytes, resulting in the production of CXCL1, a chemokine critical for recruiting neutrophils. Mice lacking either microglia or TNF-α exhibit impaired production of CXCL1, impaired neutrophil recruitment, and an increased CNS bacterial burden. C-X-C chemokine receptor 2 (CXCR2)-expressing neutrophils primarily respond to CXCL1 released by astrocytes. This study provides further insights into how immune responses drive neutrophil recruitment to the brain to combat E. coli K1 infection. In addition, we show that direct recognition of E. coli K1 by microglia is prevented by the K1 capsule. This study also reveals that OMVs are sufficient to induce microglial activation.
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Affiliation(s)
- Peng Liu
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Nankai University, Tianjin 300457, China; (P.L.); (X.W.); (Q.Y.); (X.Y.); (Y.F.); (S.Z.); (Y.W.); (M.H.)
- Tianjin Key Laboratory of Microbial Functional Genomics, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin 300457, China
| | - Xinyue Wang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Nankai University, Tianjin 300457, China; (P.L.); (X.W.); (Q.Y.); (X.Y.); (Y.F.); (S.Z.); (Y.W.); (M.H.)
- Tianjin Key Laboratory of Microbial Functional Genomics, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin 300457, China
| | - Qian Yang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Nankai University, Tianjin 300457, China; (P.L.); (X.W.); (Q.Y.); (X.Y.); (Y.F.); (S.Z.); (Y.W.); (M.H.)
- Tianjin Key Laboratory of Microbial Functional Genomics, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin 300457, China
| | - Xiaolin Yan
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Nankai University, Tianjin 300457, China; (P.L.); (X.W.); (Q.Y.); (X.Y.); (Y.F.); (S.Z.); (Y.W.); (M.H.)
- Tianjin Key Laboratory of Microbial Functional Genomics, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin 300457, China
| | - Yu Fan
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Nankai University, Tianjin 300457, China; (P.L.); (X.W.); (Q.Y.); (X.Y.); (Y.F.); (S.Z.); (Y.W.); (M.H.)
- Tianjin Key Laboratory of Microbial Functional Genomics, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin 300457, China
| | - Si Zhang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Nankai University, Tianjin 300457, China; (P.L.); (X.W.); (Q.Y.); (X.Y.); (Y.F.); (S.Z.); (Y.W.); (M.H.)
- Tianjin Key Laboratory of Microbial Functional Genomics, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin 300457, China
| | - Yi Wei
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Nankai University, Tianjin 300457, China; (P.L.); (X.W.); (Q.Y.); (X.Y.); (Y.F.); (S.Z.); (Y.W.); (M.H.)
- Tianjin Key Laboratory of Microbial Functional Genomics, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin 300457, China
| | - Min Huang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Nankai University, Tianjin 300457, China; (P.L.); (X.W.); (Q.Y.); (X.Y.); (Y.F.); (S.Z.); (Y.W.); (M.H.)
- Tianjin Key Laboratory of Microbial Functional Genomics, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin 300457, China
| | - Lingyan Jiang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Nankai University, Tianjin 300457, China; (P.L.); (X.W.); (Q.Y.); (X.Y.); (Y.F.); (S.Z.); (Y.W.); (M.H.)
- Tianjin Key Laboratory of Microbial Functional Genomics, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin 300457, China
- Correspondence: (L.J.); (L.F.)
| | - Lu Feng
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Nankai University, Tianjin 300457, China; (P.L.); (X.W.); (Q.Y.); (X.Y.); (Y.F.); (S.Z.); (Y.W.); (M.H.)
- Tianjin Key Laboratory of Microbial Functional Genomics, TEDA Institute of Biological Sciences and Biotechnology, Nankai University, Tianjin 300457, China
- Correspondence: (L.J.); (L.F.)
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8
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Massicotte-Azarniouch D, Herrera CA, Jennette JC, Falk RJ, Free ME. Mechanisms of vascular damage in ANCA vasculitis. Semin Immunopathol 2022; 44:325-345. [PMID: 35254509 PMCID: PMC9064952 DOI: 10.1007/s00281-022-00920-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 02/02/2022] [Indexed: 12/12/2022]
Abstract
The discovery of anti-neutrophil cytoplasmic antibodies (ANCA) and their antigenic targets, myeloperoxidase (MPO) and proteinase 3 (PR3), has led to further understanding as to the pathophysiologic processes that underlie vascular and tissue damage in ANCA vasculitis. ANCA trigger neutrophil activation leading to vascular damage in ANCA vasculitis. However, decades of study have determined that neutrophil activation alone is not sufficient to cause disease. Inflammatory stimuli are drivers of ANCA autoantigen expression and ANCA production. Certain infections or bacterial peptides may be crucial players in the initial steps of ANCA immunopathogenesis. Genetic and epigenetic alterations of gene encoding for MPO and PR3 provide additional disturbances to the immune homeostasis which provide a substrate for pathogenic ANCA formation from an adaptive immune system predisposed to autoreactivity. Promoted by inflammatory cytokines, ANCA binding leads to neutrophil activation, a process characterized by conformational changes, production and release of cytotoxic substances, and alternative complement pathway activation, thus creating an intense inflammatory milieu. This cascade of events perpetuates a vicious cycle of further inflammatory cell recruitment and activation, culminating in tissue necrosis. Our understanding of the pathogenic process in ANCA vasculitis paves the way for the development of therapies targeting crucial steps in this process. The greater appreciation of the role for complement, monocytes, and the adaptive immune system has already led to novel complement blockers and is poised to lead to further innovations which will allow for tailored antigen- or cell-specific immunotherapy targeting the autoimmune process without exposure to undue risks or toxicities.
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Affiliation(s)
- David Massicotte-Azarniouch
- Division of Nephrology and Hypertension, Department of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Carolina A Herrera
- Division of Nephrology and Hypertension, Department of Medicine, University of North Carolina, Chapel Hill, NC, USA
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - J Charles Jennette
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Ronald J Falk
- Division of Nephrology and Hypertension, Department of Medicine, University of North Carolina, Chapel Hill, NC, USA
| | - Meghan E Free
- Division of Nephrology and Hypertension, Department of Medicine, University of North Carolina, Chapel Hill, NC, USA.
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9
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Juzenas S, Hübenthal M, Lindqvist CM, Kruse R, Steiert TA, Degenhardt F, Schulte D, Nikolaus S, Zeissig S, Bergemalm D, Almer S, Hjortswang H, Bresso F, Strüning N, Kupcinskas J, Keller A, Lieb W, Rosenstiel P, Schreiber S, D’Amato M, Halfvarson J, Hemmrich-Stanisak G, Franke A. Detailed Transcriptional Landscape of Peripheral Blood Points to Increased Neutrophil Activation in Treatment-Naïve Inflammatory Bowel Disease. J Crohns Colitis 2022; 16:1097-1109. [PMID: 35022690 PMCID: PMC9351981 DOI: 10.1093/ecco-jcc/jjac003] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 12/13/2021] [Accepted: 01/08/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND AIMS Inflammatory bowel disease [IBD] is a chronic relapsing disorder of the gastrointestinal tract, which generally manifests as Crohn's disease [CD] or ulcerative colitis [UC]. These subtypes are heterogeneous in terms of disease location and histological features, while sharing common clinical presentation, genetic associations and, thus, common immune regulatory pathways. METHODS Using miRNA and mRNA coupled transcriptome profiling and systems biology approaches, we report a comprehensive analysis of blood transcriptomes from treatment-naïve [n = 110] and treatment-exposed [n = 177] IBD patients as well as symptomatic [n = 65] and healthy controls [n = 95]. RESULTS Broadly, the peripheral blood transcriptomes of CD and UC patients were similar. However, there was an extensive gene deregulation in the blood of IBD patients, while only a slight deregulation in symptomatic controls, when compared with healthy controls. The deregulated mRNAs and miRNAs are mainly involved in the innate immunity and are especially enriched in neutrophil activation-related pathways. Oxidative phosphorylation and neutrophil activation-related modules were found to be differentially co-expressed among treatment-naïve IBD as compared to healthy controls. In the deregulated neutrophil activation-related co-expression module, IL1B was identified as the central gene. Levels of co-expression among IL1B and chemosensing receptor [CXCR1/2 and FPR1/2] genes were reduced in the blood of IBD patients when compared with healthy controls. CONCLUSIONS Immune dysregulation seen in peripheral blood transcriptomes of treatment-naïve IBD patients is mainly driven by neutrophil activation.
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Affiliation(s)
- Simonas Juzenas
- Corresponding author: Simonas Juzenas, PhD, Institute of Clinical Molecular Biology (IKMB), Christian-Albrechts-University of Kiel (CAU), Rosalind-Franklin-Str. 12, D-24105 Kiel, Germany.
| | - Matthias Hübenthal
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany,Department of Dermatology, Quincke Research Center, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Carl Mårten Lindqvist
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany,School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Robert Kruse
- Department of Clinical Research Laboratory, Faculty of Medicine and Health, Örebro University, Örebro, Sweden,iRiSC – Inflammatory Response and Infection Susceptibility Centre, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Tim Alexander Steiert
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Frauke Degenhardt
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Dominik Schulte
- Division of Endocrinology, Diabetes and Clinical Nutrition, Department of Medicine I, University Hospital of Schleswig-Holstein, Kiel, Germany,Institute of Diabetes and Clinical Metabolic Research, Kiel University, Kiel, Germany
| | - Susanna Nikolaus
- Department of Internal Medicine I, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Sebastian Zeissig
- Medical Department 1, University Hospital Dresden, Technische Universität Dresden (TU Dresden), Dresden, Germany,Center for Regenerative Therapies Dresden (CRTD), Technische Universität (TU) Dresden, Dresden, Germany
| | - Daniel Bergemalm
- School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - Sven Almer
- Department of Medicine, Karolinska Institutet, Solna, and Division of Gastroenterology, Karolinska University Hospital, Stockholm, Sweden
| | - Henrik Hjortswang
- Department of Gastroenterology and Hepatology, Linköping University, Linköping, and Department of Health, Medicine, and Caring Sciences, Linköping University, Linköping, Sweden
| | - Francesca Bresso
- Department of Medicine, Karolinska Institutet, Solna, and Division of Gastroenterology, Karolinska University Hospital, Stockholm, Sweden
| | | | - Nina Strüning
- Department of Internal Medicine I, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Juozas Kupcinskas
- Department of Gastroenterology and Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Andreas Keller
- Chair for Clinical Bioinformatics, Saarland University, Saarbrücken, Germany,Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Wolfgang Lieb
- Institute of Epidemiology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Philip Rosenstiel
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Stefan Schreiber
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany,Department of Internal Medicine I, University Hospital Schleswig-Holstein, Kiel, Germany
| | - Mauro D’Amato
- Unit of Clinical Epidemiology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden,Gastrointestinal Genetics Lab, CIC bioGUNE – BRTA, Derio, Spain,Ikerbasque, Basque Foundation for Science, Bilbao, Spain
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10
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Vegting Y, Vogt L, Anders HJ, de Winther MPJ, Bemelman FJ, Hilhorst ML. Monocytes and macrophages in ANCA-associated vasculitis. Autoimmun Rev 2021; 20:102911. [PMID: 34298153 DOI: 10.1016/j.autrev.2021.102911] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 06/05/2021] [Indexed: 12/15/2022]
Abstract
Anti-neutrophil cytoplasmic antibodies (ANCA)-associated vasculitides (AAV) are characterized by inflammation of small-to-medium-sized blood vessels and the presence of autoantibodies against cytoplasmic proteases sited in neutrophils and monocytes. Increasing evidence indicates a substantial role of monocytes and macrophages in the pathogenesis of AAV. Activated monocytes and macrophages contribute to necroinflammation in peripheral vasculitic lesions as well as to central and peripheral mechanisms of autoimmunity. The intermediate monocyte subset (CD14++CD16+) is increased and monocytes show elevated expression of CD14, Toll-like receptor 2/4, MHCII and integrins, likely reflecting activation and increased monocyte extravasation. Monocytes differentiate locally predominantly into alternatively activated (M2) macrophages, which are known for cell-clearance and phagocytosis, but may ultimately lead to fibrosis. Phagocytotic function of macrophages can be impaired by surface expression of cytoplasmic proteases on apoptotic neutrophils and causes release of inflammatory cytokines and immunogenic contents, presumably resulting in a vicious circle of increased neutrophil, T and B cell activation and consequent ANCA production. Considering their crucial role in initiating necroinflammation as well as fibrogenesis, monocytes and macrophages may represent a logic first-line target for new treatment options in AAV.
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Affiliation(s)
- Yosta Vegting
- Department of Internal Medicine, Section of Nephrology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands.
| | - Liffert Vogt
- Department of Internal Medicine, Section of Nephrology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Hans-Joachim Anders
- Department of Internal Medicine IV, Division of Nephrology, University Hospital of the Ludwig Maximilians University Munich, Munich, Germany
| | - Menno P J de Winther
- Department of Medical Biochemistry, Amsterdam Cardiovascular Sciences, Amsterdam Infection and Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Frederike J Bemelman
- Department of Internal Medicine, Section of Nephrology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Marc L Hilhorst
- Department of Internal Medicine, Section of Nephrology, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands
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11
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Müller A, Krause B, Kerstein-Stähle A, Comdühr S, Klapa S, Ullrich S, Holl-Ulrich K, Lamprecht P. Granulomatous Inflammation in ANCA-Associated Vasculitis. Int J Mol Sci 2021; 22:ijms22126474. [PMID: 34204207 PMCID: PMC8234846 DOI: 10.3390/ijms22126474] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/04/2021] [Accepted: 06/10/2021] [Indexed: 12/21/2022] Open
Abstract
ANCA-associated vasculitis (AAV) comprises granulomatosis with polyangiitis (GPA), microscopic polyangiitis (MPA), and eosinophilic granulomatosis with polyangiitis (EGPA). While systemic vasculitis is a hallmark of all AAV, GPA is characterized by extravascular granulomatous inflammation, preferentially affecting the respiratory tract. The mechanisms underlying the emergence of neutrophilic microabscesses; the appearance of multinucleated giant cells; and subsequent granuloma formation, finally leading to scarred or destroyed tissue in GPA, are still incompletely understood. This review summarizes findings describing the presence and function of molecules and cells contributing to granulomatous inflammation in the respiratory tract and to renal inflammation observed in GPA. In addition, factors affecting or promoting the development of granulomatous inflammation such as microbial infections, the nasal microbiome, and the release of damage-associated molecular patterns (DAMP) are discussed. Further, on the basis of numerous results, we argue that, in situ, various ways of exposure linked with a high number of infiltrating proteinase 3 (PR3)- and myeloperoxidase (MPO)-expressing leukocytes lower the threshold for the presentation of an altered PR3 and possibly also of MPO, provoking the local development of ANCA autoimmune responses, aided by the formation of ectopic lymphoid structures. Although extravascular granulomatous inflammation is unique to GPA, similar molecular and cellular patterns can be found in both the respiratory tract and kidney tissue of GPA and MPA patients; for example, the antimicrobial peptide LL37, CD163+ macrophages, or regulatory T cells. Therefore, we postulate that granulomatous inflammation in GPA or PR3-AAV is intertwined with autoimmune and destructive mechanisms also seen at other sites.
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Affiliation(s)
- Antje Müller
- Department of Rheumatology & Clinical Immunology, University of Luebeck, 23562 Luebeck, Germany; (B.K.); (A.K.-S.); (S.C.); (S.K.); (P.L.)
- Correspondence: ; Tel.: +49-451-5005-0867
| | - Bettina Krause
- Department of Rheumatology & Clinical Immunology, University of Luebeck, 23562 Luebeck, Germany; (B.K.); (A.K.-S.); (S.C.); (S.K.); (P.L.)
- Institute of Anatomy & Experimental Morphology, University Hospital Hamburg-Eppendorf, University of Hamburg, 20251 Hamburg, Germany;
| | - Anja Kerstein-Stähle
- Department of Rheumatology & Clinical Immunology, University of Luebeck, 23562 Luebeck, Germany; (B.K.); (A.K.-S.); (S.C.); (S.K.); (P.L.)
| | - Sara Comdühr
- Department of Rheumatology & Clinical Immunology, University of Luebeck, 23562 Luebeck, Germany; (B.K.); (A.K.-S.); (S.C.); (S.K.); (P.L.)
| | - Sebastian Klapa
- Department of Rheumatology & Clinical Immunology, University of Luebeck, 23562 Luebeck, Germany; (B.K.); (A.K.-S.); (S.C.); (S.K.); (P.L.)
- Institute of Experimental Medicine c/o German Naval Medical Institute, Carl-Albrechts University of Kiel, 24119 Kronshagen, Germany
| | - Sebastian Ullrich
- Institute of Anatomy & Experimental Morphology, University Hospital Hamburg-Eppendorf, University of Hamburg, 20251 Hamburg, Germany;
- Municipal Hospital Kiel, 24116 Kiel, Germany
| | | | - Peter Lamprecht
- Department of Rheumatology & Clinical Immunology, University of Luebeck, 23562 Luebeck, Germany; (B.K.); (A.K.-S.); (S.C.); (S.K.); (P.L.)
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12
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Arroyo AB, Fernández-Pérez MP, Del Monte A, Águila S, Méndez R, Hernández-Antolín R, García-Barber N, de Los Reyes-García AM, González-Jiménez P, Arcas MI, Vicente V, Menéndez R, Andrés V, González-Conejero R, Martínez C. miR-146a is a pivotal regulator of neutrophil extracellular trap formation promoting thrombosis. Haematologica 2021; 106:1636-1646. [PMID: 32586906 PMCID: PMC8168495 DOI: 10.3324/haematol.2019.240226] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Indexed: 12/24/2022] Open
Abstract
Neutrophil extracellular traps (NETs) induce a procoagulant response linking inflammation and thrombosis. Low levels of miR-146a, a brake of inflammatory response, are involved in higher risk for cardiovascular events, but the mechanisms explaining how miR-146a exerts its function remain largely undefined. The aim of this study was to explore the impact of miR-146a deficiency in NETosis both, in sterile and non-sterile models in vivo, and to inquire into the underlying mechanism. Two models of inflammation were performed: 1) Ldlr-/- mice transplanted with bone marrow from miR-146a-/- or wild type (WT) were fed high-fat diet, generating an atherosclerosis model; and 2) an acute inflammation model was generated by injecting lipopolysaccharide (LPS) (1 mg/Kg) into miR-146a-/- and WT mice. miR-146a deficiency increased NETosis in both models. Accordingly, miR-146a-/- mice showed significant reduced carotid occlusion time and elevated levels of NETs in thrombi following FeCl3-induced thrombosis. Infusion of DNAse I abolished arterial thrombosis in WT and miR-146a-/- mice. Interestingly, miR-146a deficient mice have aged, hyperreactive and pro-inflammatory neutrophils in circulation that are more prone to form NETs independently of the stimulus. Furthermore, we demonstrated that community acquired pneumonia (CAP) patients with reduced miR-146a levels associated with the T variant of the functional rs2431697, presented an increased risk for cardiovascular events due in part to an increased generation of NETs.
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13
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Matsumoto K, Kurasawa T, Yoshimoto K, Suzuki K, Takeuchi T. Identification of neutrophil β2-integrin LFA-1 as a potential mechanistic biomarker in ANCA-associated vasculitis via microarray and validation analyses. Arthritis Res Ther 2021; 23:136. [PMID: 33957974 PMCID: PMC8101175 DOI: 10.1186/s13075-021-02510-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 04/12/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Leukocyte activation by anti-neutrophil cytoplasmic antibody (ANCA) and the subsequent leukocyte-endothelium interaction play a key role in the development of endothelial damage in ANCA-associated vasculitis (AAV). In contrast to that of leukocyte activation, the exact role of the leukocyte-endothelium interaction via integrin remains unclear. Here, we performed microarray and validation analyses to explore association between the expression levels of lymphocyte function-associated antigen-1 (LFA-1) and the clinical characteristics of patients with AAV. METHODS We performed gene set enrichment analysis (GSEA) to identify the functional gene sets differentially expressed between patients with AAV and other types of vasculitis and the healthy controls (HCs). Flow cytometry was performed to validate the GSEA results. Treatment-naïve patients were monitored until 24 weeks of treatment. To examine the role of LFA-1 in the neutrophil-endothelium interaction, we performed a leukocyte adhesion and transmigration assay using peripheral blood and human umbilical vein endothelial cells (HUVECs). RESULTS GSEA revealed that the molecular pathways involving integrin-related genes were significantly upregulated in patients with AAV compared to that in patients with other types of vasculitis and the HCs. Flow cytometry revealed that the percentage of neutrophils expressing LFA-1 was significantly higher in patients with AAV than in those with large-vessel vasculitis or polyarteritis nodosa and the HCs. LFA-1 levels in the neutrophils were higher in patients with MPO-ANCA-positive expression than in those with a positive PR3-ANCA expression and correlated with the peripheral eosinophil count, serum rheumatoid factor titre, serum C-reactive protein levels, and the vasculitis activity score of systemic and chest components. After 24 weeks of treatment, including prednisolone, cyclophosphamide, rituximab, azathioprine, methotrexate, and/or tacrolimus, neutrophil LFA-1 expression remained high in the non-responder patients, but decreased in the responder patients. The in vitro assay showed that leukocyte migration toward HUVECs was dependent on the interaction between LFA-1 and intercellular adhesion molecule-1 (ICAM1); the migration of leukocytes was inhibited by blocking the adhesion of LFA-1 to ICAM1. CONCLUSIONS The expression of LFA-1 in neutrophils is increased in patients with AAV. Neutrophil LFA-1 levels correlate with the clinical features of AAV. Inhibiting the adhesion of LFA-1 and ICAM1 impedes the neutrophil-endothelium interaction and may have a therapeutic role in AAV.
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Affiliation(s)
- Kotaro Matsumoto
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan
| | - Takahiko Kurasawa
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan.,Department of Rheumatology and Clinical Immunology, Saitama Medical Center, Saitama Medical University, 1981 Kamoda, Kawagoe, Saitama, Japan
| | - Keiko Yoshimoto
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan
| | - Katsuya Suzuki
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan
| | - Tsutomu Takeuchi
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan.
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14
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Richardson IM, Calo CJ, Hind LE. Microphysiological Systems for Studying Cellular Crosstalk During the Neutrophil Response to Infection. Front Immunol 2021; 12:661537. [PMID: 33986752 PMCID: PMC8111168 DOI: 10.3389/fimmu.2021.661537] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 04/09/2021] [Indexed: 12/13/2022] Open
Abstract
Neutrophils are the primary responders to infection, rapidly migrating to sites of inflammation and clearing pathogens through a variety of antimicrobial functions. This response is controlled by a complex network of signals produced by vascular cells, tissue resident cells, other immune cells, and the pathogen itself. Despite significant efforts to understand how these signals are integrated into the neutrophil response, we still do not have a complete picture of the mechanisms regulating this process. This is in part due to the inherent disadvantages of the most-used experimental systems: in vitro systems lack the complexity of the tissue microenvironment and animal models do not accurately capture the human immune response. Advanced microfluidic devices incorporating relevant tissue architectures, cell-cell interactions, and live pathogen sources have been developed to overcome these challenges. In this review, we will discuss the in vitro models currently being used to study the neutrophil response to infection, specifically in the context of cell-cell interactions, and provide an overview of their findings. We will also provide recommendations for the future direction of the field and what important aspects of the infectious microenvironment are missing from the current models.
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Affiliation(s)
| | | | - Laurel E. Hind
- Department of Chemical and Biological Engineering, University of Colorado – Boulder, Boulder, CO, United States
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15
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Zhu LM, Zeng D, Lei XC, Huang J, Deng YF, Ji YB, Liu J, Dai FF, Li YZ, Shi DD, Zhu YQ, Dai AG, Wang Z. KLF2 regulates neutrophil migration by modulating CXCR1 and CXCR2 in asthma. Biochim Biophys Acta Mol Basis Dis 2020; 1866:165920. [PMID: 32800946 DOI: 10.1016/j.bbadis.2020.165920] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 07/01/2020] [Accepted: 08/05/2020] [Indexed: 12/19/2022]
Abstract
Neutrophils are key inflammatory cells in the immunopathogenesis of asthma. Neutrophil migration can be initiated through activation of the CXCR1 and CXCR2 receptors by CXC chemokines, such as IL-8. Although transcription factor KLF2 has been found to maintain T cell migration patterns through repression of several chemokine receptors, whether KLF2 can regulate neutrophil migration via modulation of CXCR1 and CXCR2 is unknown. Here, we aimed to explore the functions of KLF2, CXCR1 and CXCR2 in neutrophil migration in asthma and to establish a regulatory role of KLF2 for CXCR1/2. We demonstrate that with asthma aggravation, the percentages and migration rates of peripheral blood neutrophils gradually increased in asthmatic patients and the guinea pig asthma model. Correspondingly, both the KLF2 mRNA and protein levels in neutrophils were gradually reduced. While CXCR1 and CXCR2 expression was negatively correlated with KLF2. In vitro knockdown of KLF2 dramatically increased the migration of HL-60-drived neutrophil-like cells, which was accompanied by an increase in the CXCR1 and CXCR2 mRNA and protein expression levels. Taken together, our results indicate that decreased KLF2 aggravates asthma progression by promoting neutrophil migration, which is associated with the transcriptional upregulation of CXCR1 and CXCR2. The KLF2 and/or CXCR1/2 expression levels may represent an indicator of asthma severity.
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Affiliation(s)
- Li-Ming Zhu
- Department of Geriatric Respiratory Medicine, Hunan Provincial People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha 410016, China; Institute of Respiratory Disease, Hunan Provincial People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha 410016, China.
| | - Dan Zeng
- Institute of Respiratory Disease, Hunan Provincial People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha 410016, China
| | - Xue-Chun Lei
- Department of Geriatric Respiratory Medicine, Hunan Provincial People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha 410016, China
| | - Jin Huang
- Department of Geriatric Respiratory Medicine, Hunan Provincial People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha 410016, China
| | - Yan-Feng Deng
- Department of Geriatric Respiratory Medicine, Hunan Provincial People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha 410016, China
| | - Yu-Bin Ji
- Department of Geriatric Respiratory Medicine, Hunan Provincial People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha 410016, China
| | - Jing Liu
- Molecular Biology Research Center, School of life Sciences, Central South University, Changsha 410008, China
| | - Fang-Fang Dai
- Department of Geriatric Respiratory Medicine, Hunan Provincial People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha 410016, China
| | - Yu-Zhu Li
- Department of Geriatric Respiratory Medicine, Hunan Provincial People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha 410016, China
| | - Dan-Dan Shi
- Department of Geriatric Respiratory Medicine, Hunan Provincial People's Hospital, The First-Affiliated Hospital of Hunan Normal University, Changsha 410016, China
| | - Ying-Qun Zhu
- Department of Respiratory Medicine, The Third Hospital of Changsha, Changsha 410015, China
| | - Ai-Guo Dai
- Institute of Respiratory Disease, Changsha medical University, Changsha 410219, China
| | - Zi Wang
- Molecular Biology Research Center, School of life Sciences, Central South University, Changsha 410008, China; Key Laboratory of Nanobiological Technology of Chinese Minisitry of Health, Xiangya Hospital, Central South Universeity, Changsha 410008, China.
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16
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Sengupta S, Caldwell CC, Nomellini V. Distinct Neutrophil Populations in the Spleen During PICS. Front Immunol 2020; 11:804. [PMID: 32499777 PMCID: PMC7243340 DOI: 10.3389/fimmu.2020.00804] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 04/08/2020] [Indexed: 12/19/2022] Open
Abstract
While mortality after acute sepsis has decreased, the long-term recovery for survivors is still poor, particularly those developing persistent inflammation, immunosuppression, and catabolism syndrome (PICS). While previously thought that activated neutrophils responding to the acute phase of sepsis migrate to the spleen to undergo cell death and contribute to immunosuppression, our data show a significant accumulation of distinct, yet functional, neutrophil populations in the spleen in a murine model of PICS. The exact role and function of neutrophils in this response is still unclear. The objective of our study was to better define the immune function of splenic neutrophils to determine if this could give insight into the pathogenesis of PICS. Using a murine model of cecal ligation and puncture (CLP), which demonstrates all characteristics of PICS by 8 days, spleens were harvested, and neutrophils were identified by Ly6G and CD11b expression via flow cytometry. Nearly all splenic neutrophils expressed CD54, but there were distinct CD54hi and CD54lo cells, with the majority being CD54lo cells during PICS. The CD54hi population showed traditional, proinflammatory properties, but a relatively decreased chemotactic response, while CD54lo cells had significantly higher chemotaxis, yet significantly decreased proinflammatory functions. Using 5-ethynyl-2′-deoxyuridine (EdU) incorporation, we found that the CD54hi population on day 2 after CLP may be participating in emergency myelopoiesis. However, the vast majority of the CD54lo population were paused in the G1 phase at this time point and not proliferating. By day 8 after CLP, most of the CD54hi cells in the spleen were no longer proliferating, while the CD54lo cells were, indicating that CD54lo dominate in extramedullary myelopoiesis at later time points. Almost none of the neutrophils produced arginase or inducible nitric oxide synthase (iNOS), indicating that these are not suppressor cells. Overall, our data demonstrate that neutrophil accumulation in the spleen during PICS is related to extramedullary myelopoiesis, leading to the production of immature neutrophils. While not suppressor cells, the majority have greater chemotactic function but less inflammatory responsiveness, which may contribute to the immunosuppression seen in PICS. Attention to these distinct neutrophil populations after septic or other systemic inflammatory responses is therefore critical to understanding the mechanisms of PICS.
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Affiliation(s)
- Satarupa Sengupta
- Division of Research, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Charles C Caldwell
- Division of Research, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, United States.,Division of Research, Shriners Hospital for Children, Cincinnati, OH, United States
| | - Vanessa Nomellini
- Division of Research, Shriners Hospital for Children, Cincinnati, OH, United States.,Section of General Surgery, Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, OH, United States
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Hu P, Su H, Xiao H, Gou SJ, Herrera CA, Alba MA, Kakoki M, Falk RJ, Jennette JC. Kinin B1 Receptor Is Important in the Pathogenesis of Myeloperoxidase-Specific ANCA GN. J Am Soc Nephrol 2020; 31:297-307. [PMID: 31772138 PMCID: PMC7003314 DOI: 10.1681/asn.2019010032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 10/17/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Myeloperoxidase-specific ANCA (MPO-ANCA) are implicated in the pathogenesis of vasculitis and GN. Kinins play a major role during acute inflammation by regulating vasodilatation and vascular permeability and by modulating adhesion and migration of leukocytes. Kinin system activation occurs in patients with ANCA vasculitis. Previous studies in animal models of GN and sclerosing kidney diseases have demonstrated protective effects of bradykinin receptor 1 (B1R) blockade via interference with myeloid cell trafficking. METHODS To investigate the role of B1R in a murine model of MPO-ANCA GN, we evaluated effects of B1R genetic ablation and pharmacologic blockade. We used bone marrow chimeric mice to determine the role of B1R in bone marrow-derived cells (leukocytes) versus nonbone marrow-derived cells. We elucidated mechanisms of B1R effects using in vitro assays for MPO-ANCA-induced neutrophil activation, endothelial adherence, endothelial transmigration, and neutrophil adhesion molecule surface display. RESULTS B1R deficiency or blockade prevented or markedly reduced ANCA-induced glomerular crescents, necrosis, and leukocyte influx in mice. B1R was not required for in vitro MPO-ANCA-induced neutrophil activation. Leukocyte B1R deficiency, but not endothelial B1R deficiency, decreased glomerular neutrophil infiltration induced by MPO-ANCA in vivo. B1R enhanced ANCA-induced neutrophil endothelial adhesion and transmigration in vitro. ANCA-activated neutrophils exhibited changes in Mac-1 and LFA-1, important regulators of neutrophil endothelial adhesion and transmigration: ANCA-activated neutrophils increased surface expression of Mac-1 and increased shedding of LFA-1, whereas B1R blockade reduced these effects. CONCLUSIONS The leukocyte B1R plays a critical role in the pathogenesis of MPO-ANCA-induced GN in a mouse model by modulating neutrophil-endothelial interaction. B1R blockade may have potential as a therapy for ANCA GN and vasculitis.
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Affiliation(s)
- Peiqi Hu
- Nephropathology Division, Department of Pathology and Laboratory Medicine and
| | - Hua Su
- Department of Nephrology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hong Xiao
- Nephropathology Division, Department of Pathology and Laboratory Medicine and
| | - Shen-Ju Gou
- Nephropathology Division, Department of Pathology and Laboratory Medicine and
| | - Carolina A Herrera
- Nephropathology Division, Department of Pathology and Laboratory Medicine and
- Division of Nephrology and Hypertension, Department of Medicine, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and
| | - Marco A Alba
- Nephropathology Division, Department of Pathology and Laboratory Medicine and
| | - Masao Kakoki
- Nephropathology Division, Department of Pathology and Laboratory Medicine and
| | - Ronald J Falk
- Nephropathology Division, Department of Pathology and Laboratory Medicine and
- Division of Nephrology and Hypertension, Department of Medicine, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and
| | - J Charles Jennette
- Nephropathology Division, Department of Pathology and Laboratory Medicine and
- Division of Nephrology and Hypertension, Department of Medicine, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and
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18
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Pohl K, Nichols DP, Taylor-Cousar JL, Saavedra MT, Strand MJ, Nick JA, Bratcher PE. Corticosteroid use and increased CXCR2 levels on leukocytes are associated with lumacaftor/ivacaftor discontinuation in cystic fibrosis patients homozygous for the F508del CFTR mutation. PLoS One 2018; 13:e0209026. [PMID: 30540818 PMCID: PMC6291130 DOI: 10.1371/journal.pone.0209026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 11/27/2018] [Indexed: 12/12/2022] Open
Abstract
Cystic fibrosis (CF) is the most common life-shortening genetic disease and is caused by mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene. Several current therapies aim at improving availability and/or function of the mutant CFTR proteins. The combination therapeutic lumacaftor/ivacaftor (Orkambi, luma/iva) partially corrects folding and potentiates CFTR function impaired by the F508del mutation. Despite the potential for clinical benefit, a substantial number of patients discontinue treatment due to intolerable adverse effects. The aim of the present study is to identify differences between individuals who continued treatment and those who discontinued due to adverse respiratory effects to potentially inform treatment decisions. Clinical data from the year prior to treatment initiation were analyzed from 82 patients homozygous for the F508del mutation treated at the Colorado Adult CF Program. Blood samples were collected from 30 of these subjects before initiation of treatment to examine expression of circulating leukocyte surface antigens and cytokines. Clinical and demographic characteristics were analyzed along with inflammatory markers to determine biomarkers of drug discontinuation. The use of oral prednisone and/or nasal budesonide in the year prior to luma/iva initiation was more prevalent in CF subjects who did not tolerate luma/iva (82% vs. 43%). Increased age, but not gender or initial lung function, was associated with higher probability of discontinuing treatment due to side effects overall. Worse lung function (lower ppFEV1, ppFEF25-75 ≤ 60%) was associated with higher incidence of discontinuing treatment due to pulmonary adverse effects. In a nested cohort of patients, increased surface levels of CXCR2 on CD14+CD16- monocytes were associated with discontinuation. Overall, the patients who tolerated luma/iva were distinguishable from those who did not tolerate the drug based on clinical and cellular markers obtained prior to treatment initiation.
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Affiliation(s)
- Kerstin Pohl
- Department of Medicine, National Jewish Health, Denver, CO, United States of America
| | - David P. Nichols
- Department of Pediatrics, University of Washington, Seattle, WA, United States of America
| | - Jennifer L. Taylor-Cousar
- Department of Medicine, National Jewish Health, Denver, CO, United States of America
- Department of Pediatrics, National Jewish Health, Denver, CO, United States of America
- University of Colorado School of Medicine, Aurora, CO, United States of America
| | - Milene T. Saavedra
- Department of Medicine, National Jewish Health, Denver, CO, United States of America
- University of Colorado School of Medicine, Aurora, CO, United States of America
| | - Matthew J. Strand
- Biostatistics and Bioinformatics, National Jewish Health, Denver, CO, United States of America
| | - Jerry A. Nick
- Department of Medicine, National Jewish Health, Denver, CO, United States of America
- University of Colorado School of Medicine, Aurora, CO, United States of America
| | - Preston E. Bratcher
- Department of Pediatrics, National Jewish Health, Denver, CO, United States of America
- * E-mail:
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19
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Borilova Linhartova P, Kavrikova D, Tomandlova M, Poskerova H, Rehka V, Dušek L, Izakovicova Holla L. Differences in Interleukin-8 Plasma Levels between Diabetic Patients and Healthy Individuals Independently on Their Periodontal Status. Int J Mol Sci 2018; 19:E3214. [PMID: 30340321 PMCID: PMC6214016 DOI: 10.3390/ijms19103214] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 10/14/2018] [Accepted: 10/15/2018] [Indexed: 12/13/2022] Open
Abstract
Chronic periodontitis (CP) and diabetes mellitus (DM) involve several aspects of immune functions, including neutrophil activity and cytokine biology. Considering the critical function of chemokine interleukin-8 (IL-8) in the inflammatory process, the aims of this study were to determine: (i) IL-8 plasma levels; (ii) IL-8 (-251A/T, rs4073) and its receptor 2 (CXCR2, +1208C/T, rs1126579) polymorphisms, and (iii) the presence of the selected periodontal bacteria in types 1 and 2 DM patients (T1DM and T2DM) and systemically healthy controls (HC) with known periodontal status. This case⁻control study comprises of 153 unrelated individuals: 36/44 patients suffering from T1DM+CP/T2DM+CP and 32/41 from HC+CP/non-periodontitis HC. Both the clinical and biochemical parameters were monitored. The genotypes were determined using qPCR, IL-8 plasma levels were measured using an ELISA kit. Subgingival bacterial colonization was analyzed with a DNA microarray detection kit. The IL-8 plasma levels differed significantly between non-periodontitis HC and T1DM+CP/T2DM+CP patients (P < 0.01). Even in HC+CP, IL-8 concentrations were significantly lower than in T1DM+CP/T2DM+CP patients (P ≤ 0.05). No significant associations between the IL-8 plasma levels and the studied IL-8 and CXCR2 polymorphisms or the occurrence of selected periodontal bacteria (P > 0.05) were found. CP does not influence the circulating IL-8 levels. Patients with T1DM+CP/T2DM+CP had higher circulating IL-8 levels than HC+CP/non-periodontitis HC.
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Affiliation(s)
- Petra Borilova Linhartova
- Clinic of Stomatology, Institution Shared with St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Pekarska 664/53, 60200 Brno, Czech Republic.
- Department of Pathophysiology, Faculty of Medicine, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic.
| | - Denisa Kavrikova
- Clinic of Stomatology, Institution Shared with St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Pekarska 664/53, 60200 Brno, Czech Republic.
| | - Marie Tomandlova
- Department of Biochemistry, Faculty of Medicine, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic.
| | - Hana Poskerova
- Clinic of Stomatology, Institution Shared with St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Pekarska 664/53, 60200 Brno, Czech Republic.
| | - Vaclav Rehka
- Faculty of Medicine, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic.
| | - Ladislav Dušek
- Institute of Biostatistics and Analyses, Faculty of Medicine, Masaryk University, 62500 Brno, Czech Republic.
| | - Lydie Izakovicova Holla
- Clinic of Stomatology, Institution Shared with St. Anne's Faculty Hospital, Faculty of Medicine, Masaryk University, Pekarska 664/53, 60200 Brno, Czech Republic.
- Department of Pathophysiology, Faculty of Medicine, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic.
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20
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Van Pelt DW, Guth LM, Wang AY, Horowitz JF. Factors regulating subcutaneous adipose tissue storage, fibrosis, and inflammation may underlie low fatty acid mobilization in insulin-sensitive obese adults. Am J Physiol Endocrinol Metab 2017; 313:E429-E439. [PMID: 28679624 PMCID: PMC5668599 DOI: 10.1152/ajpendo.00084.2017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 06/01/2017] [Accepted: 06/30/2017] [Indexed: 11/22/2022]
Abstract
Although the rate of fatty acid release from adipose tissue into the systemic circulation is very high in most obese adults, some obese adults maintain relatively low rates of fatty acid release, which helps protect them against the development of systemic insulin resistance. The primary aim of this study was to identify factors in adipose tissue that may underlie low vs. high rates of fatty acid mobilization in a relatively homogeneous cohort of obese adults. We measured systemic fatty acid rate of appearance (FA Ra) via 13C-palmitate isotope dilution, and we obtained subcutaneous abdominal adipose tissue samples from 30 obese adults (BMI: 38 ± 1 kg/m2, age: 30 ± 2 yr) after an overnight fast. We then measured insulin sensitivity using a hyperinsulinemic-euglycemic clamp. Confirming our previous work, insulin sensitivity was inversely proportional to FA Ra (R2 = 0.50; P < 0.001). Immunoblot analysis of subcutaneous adipose tissue samples revealed that, compared with obese adults with high FA Ra, those with low FA Ra had lower markers of lipase activation and higher abundance of glycerol-3-phosphate acyltransferase, which is a primary enzyme for fatty acid esterification. Microarray and pathway analysis provided evidence of lower fibrosis and lower SAPK/JNK pathway activation in obese adults with low FA Ra compared with those with high FA Ra. Our findings suggest that alterations in factors regulating triglyceride storage in adipose tissue, along with lower fibrosis and inflammatory pathway activation, may underlie maintenance of a relatively low FA Ra in obesity, which may help protect against the development of insulin resistance.
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Affiliation(s)
- Douglas W Van Pelt
- Substrate Metabolism Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, Michigan
| | - Lisa M Guth
- Substrate Metabolism Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, Michigan
| | - Abigail Y Wang
- Substrate Metabolism Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, Michigan
| | - Jeffrey F Horowitz
- Substrate Metabolism Laboratory, School of Kinesiology, University of Michigan, Ann Arbor, Michigan
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21
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Wang C, Chang DY, Chen M, Zhao MH. HMGB1 contributes to glomerular endothelial cell injury in ANCA-associated vasculitis through enhancing endothelium-neutrophil interactions. J Cell Mol Med 2017; 21:1351-1360. [PMID: 28181422 PMCID: PMC5487910 DOI: 10.1111/jcmm.13065] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 11/17/2016] [Indexed: 12/19/2022] Open
Abstract
Our previous studies demonstrated that high mobility group box‐1 (HMGB1), a typical damage‐associated molecular pattern (DAMP) protein, is associated with the disease activity of antineutrophil cytoplasmic antibody (ANCA)‐associated vasculitis (AAV). Moreover, HMGB1 participates in ANCA‐induced neutrophil activation. The current study aimed to investigate whether HMGB1 regulated the interaction between neutrophils and glomerular endothelial cells (GEnC) in the presence of ANCA. Correlation analysis on HMGB1 levels in AAV patients and soluble intercellular cell adhesion molecule‐1 (sICAM‐1) levels or vascular endothelial growth factor (VEGF) levels, which are markers of endothelial cell activation, was performed. The effect of HMGB1 on neutrophil migration towards GEnC, respiratory burst and degranulation of neutrophils in coculture conditions with GEnC was measured. The activation of neutrophils, the activation and injury of GEnC, and the consequent pathogenic role of injured GEnC were evaluated. Plasma levels of HMGB1 correlated with sICAM‐1 and VEGF (r = 0.73, P < 0.01; r = 0.41, P = 0.04) in AAV patients. HMGB1 increased neutrophil migration towards GEnC, as well as respiratory burst and degranulation of neutrophils in the presence of ANCA in the coculture system. In the presence of robust neutrophil activation, GEnC were further activated and injured in the coculture system of GEnC and neutrophils. In addition, injured GEnC could produce TF‐positive leuco‐endothelial microparticles and endothelin‐1 (ET‐1), while NF‐κB was phosphorylated (S529) in the injured GEnC. Plasma levels of HMGB1 correlated with endothelial cell activation in AAV patients. HMGB1 amplified neutrophil activation and the activation and injury of GEnC in the presence of ANCA.
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Affiliation(s)
- Chen Wang
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
| | - Dong-Yuan Chang
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
| | - Min Chen
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
| | - Ming-Hui Zhao
- Renal Division, Department of Medicine, Peking University First Hospital, Institute of Nephrology, Peking University, Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, China
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22
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Pawlick RL, Wink J, Pepper AR, Bruni A, Abualhassen N, Rafiei Y, Gala-Lopez B, Bral M, Shapiro AJ. Reparixin, a CXCR1/2 inhibitor in islet allotransplantation. Islets 2016; 8:115-24. [PMID: 27328412 PMCID: PMC5029202 DOI: 10.1080/19382014.2016.1199303] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Quality of life in Type 1 diabetic patients may be improved with islet transplantation, but lifelong immunosuppression is required to prevent rejection. Allo-immune response is a key player in graft dysfunction and although the adaptive immune response is well characterized, the effect of the innate immune reaction after transplantation is only recently becoming appreciated. In this study, we address how the innate response affects long-term outcomes in a murine islet allotransplant model. CTLA-4 Ig treatment is known to significantly prolong kidney subcapsular islet allograft survival and enhance glucose tolerance. The combination of CTLA-4 Ig with reparixin, which blocks against inflammatory neutrophil infiltration, yielded no long-term graft survival in an intrahepatic allotransplant model but had similar long-term graft survival in the kidney subcapsular model. Seven days after transplant, serum blood IFN-γ levels were significantly lower in the CTLA-4 Ig with reparixin treatment group compared to controls. IL-12p70 cytokine levels were increased with combination treatment, a positive modulation of the inflammatory response to the allograft. Furthermore, KC GRO, also known as CXCL1, was decreased in serum 7 d after transplant. Histologically, we found that immune cell infiltrate, CD4+ and CD8+ T cell populations along with both CXCR1+ and CXCR2+ cell populations were decreased within the CTLA-4 Ig and reparixin islet transplant graft. Overall these data provide insight into the down regulation of T-cell recruitment by CTLA-4 Ig and decreased neutrophil activation and recruitment with reparixin after long-term islet graft survival.
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Affiliation(s)
- Rena L. Pawlick
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
| | - John Wink
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
| | - Andrew R. Pepper
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
| | - Antonio Bruni
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
| | | | - Yasmin Rafiei
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
| | - Boris Gala-Lopez
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
| | - Mariusz Bral
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
| | - A.M. James Shapiro
- Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada
- Clinical Islet Transplant Program, University of Alberta, Edmonton, AB, Canada
- CONTACT: Dr. A.M. James Shapiro , Canada Research Chair in Transplantation Surgery and Regenerative Medicine, 2000 College Plaza, 8215 112th St., Edmonton, AB, Canada T6G 2C8
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23
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Kanzaki G, Nagasaka S, Higo S, Kajimoto Y, Kanemitsu T, Aoki M, Nagahama K, Natori Y, Tsuboi N, Yokoo T, Shimizu A. Impact of anti-glomerular basement membrane antibodies and glomerular neutrophil activation on glomerulonephritis in experimental myeloperoxidase-antineutrophil cytoplasmic antibody vasculitis. Nephrol Dial Transplant 2015; 31:574-85. [PMID: 26582929 DOI: 10.1093/ndt/gfv384] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 10/14/2015] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Antineutrophil cytoplasmic antibody (ANCA) and neutrophil interactions play important roles in ANCA-associated vasculitis (AAV) pathogenesis. However, mechanisms underlying the pathogenesis of crescent formation in ANCA-associated vasculitis have not been completely elucidated. To ascertain the involvement of these interactions in necrotizing crescentic glomerulonephritis (NCGN), we used an AAV rat model and investigated the effects of the anti-myeloperoxidase (MPO) antibody (Ab) titer, tumor necrosis factor α (TNF-α), granulocyte colony-stimulating factor (G-CSF) and subnephritogenic anti-glomerular basement membrane (GBM) Abs, as proinflammatory stimuli. METHODS NCGN was induced in Wistar Kyoto rats by human MPO (hMPO) immunization. Renal function, pathology, and glomerular cytokine and chemokine expression were evaluated in hMPO-immunized rats with/without several co-treatments (TNF-α, G-CSF or subnephritogenic anti-GBM Abs). Rat neutrophils activation by IgG purified from rat serum in each group was examined in vitro. RESULTS The hMPO-immunized rats had significantly higher level of anti-hMPO Ab production. The induced anti-hMPO Abs cross-reacted with TNF-α- or G-CSF-primed rat neutrophils secreting TNF-α and interleukin-1β in vitro. The reactivity of anti-MPO Abs against rat MPO, crescent formation with neutrophil extracellular traps and glomerular-activated neutrophil infiltration in the rat model were significantly enhanced by subnephritogenic anti-GBM Ab but not by TNF-α or G-CSF administration. The model rats injected with the subnephritogenic anti-GBM Abs showed increased urinary albumin excretion and serum TNF-α, chemokine (C-X-C) ligand 1 (CXCL1) and CXCL2 levels. TNF-α, CXCL1, CXCL2 and CXCL8 increased in the glomeruli with significant amounts of crescent formation. In addition, in vitro activated neutrophils decreased CXC chemokine receptor 1 (CXCR1) and CXCR2 expressions. CONCLUSIONS The coexistence of subnephritogenic anti-GBM Abs leads to the inflammatory environment in glomeruli that is amplified by the interaction of ANCA and neutrophils. Development of NCGN in MPO-AAV may be necessary for not only the accumulation of neutrophils in glomeruli, but also the aberrant neutrophil activation on glomerulonephritis.
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Affiliation(s)
- Go Kanzaki
- Department of Analytic Human Pathology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan Division of Nephrology and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Shinya Nagasaka
- Department of Analytic Human Pathology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
| | - Seiichiro Higo
- Department of Analytic Human Pathology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
| | - Yusuke Kajimoto
- Department of Analytic Human Pathology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
| | - Takafumi Kanemitsu
- Department of Analytic Human Pathology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
| | - Michiko Aoki
- Department of Analytic Human Pathology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
| | - Kiyotaka Nagahama
- Department of Analytic Human Pathology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
| | - Yasuhiro Natori
- Department of Health Chemistry, School of Pharmacy, Iwate Medical University, Iwate, Japan
| | - Nobuo Tsuboi
- Division of Nephrology and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Takashi Yokoo
- Division of Nephrology and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Akira Shimizu
- Department of Analytic Human Pathology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
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Wu F, Zhao Y, Jiao T, Shi D, Zhu X, Zhang M, Shi M, Zhou H. CXCR2 is essential for cerebral endothelial activation and leukocyte recruitment during neuroinflammation. J Neuroinflammation 2015; 12:98. [PMID: 25990934 PMCID: PMC4438521 DOI: 10.1186/s12974-015-0316-6] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 04/30/2015] [Indexed: 01/05/2023] Open
Abstract
Background Chemokines and chemokine receptors cooperate to promote immune cell recruitment to the central nervous system (CNS). In this study, we investigated the roles of CXCR2 and CXCL1 in leukocyte recruitment to the CNS using a murine model of neuroinflammation. Methods Wild-type (WT), CXCL1−/−, and CXCR2−/− mice each received an intracerebroventricular (i.c.v.) injection of lipopolysaccharide (LPS). Esterase staining and intravital microscopy were performed to examine neutrophil recruitment to the brain. To assess endothelial activation in these mice, the expression of adhesion molecules was measured via quantitative real-time polymerase chain reaction (PCR) and Western blotting. To identify the cellular source of functional CXCR2, chimeric mice were generated by transferring bone marrow cells between the WT and CXCR2−/− mice. Results Expression levels of the chemokines CXCL1, CXCL2, and CXCL5 were significantly increased in the brain following the i.c.v. injection of LPS. CXCR2 or CXCL1 deficiency blocked neutrophil infiltration and leukocyte recruitment in the cerebral microvessels. In the CXCR2−/− and CXCL1−/− mice, the cerebral endothelial expression of adhesion molecules such as P-selectin and VCAM-1 was dramatically reduced. Furthermore, the bone marrow transfer experiments demonstrated that CXCR2 expression on CNS-residing cells is essential for cerebral endothelial activation and leukocyte recruitment. Compared with microglia, cultured astrocytes secreted a much higher level of CXCL1 in vitro. Astrocyte culture conditioned medium significantly increased the expression of VCAM-1 and ICAM-1 in cerebral endothelial cells in a CXCR2-dependent manner. Additionally, CXCR2 messenger RNA (mRNA) expression in cerebral endothelial cells but not in microglia or astrocytes was increased following tumor necrosis factor-α (TNF-α) stimulation. The intravenous injection of the CXCR2 antagonist SB225002 significantly inhibited endothelial activation and leukocyte recruitment to cerebral microvessels. Conclusions CXCL1 secreted by astrocytes and endothelial CXCR2 play essential roles in cerebral endothelial activation and subsequent leukocyte recruitment during neuroinflammation.
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Affiliation(s)
- Fengjiao Wu
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Yawei Zhao
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Tian Jiao
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Dongyan Shi
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Xingxing Zhu
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Mingshun Zhang
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
| | - Meiqing Shi
- Division of Immunology, Virginia-Maryland College of Veterinary Medicine, University of Maryland, College Park, Maryland, MD, 20742, USA.
| | - Hong Zhou
- Department of Immunology, Nanjing Medical University, 140 Hanzhong Road, Nanjing, JS, 210029, China.
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25
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Khairnar A, Marchand F, Vidal A, Etienne M, Miladi I, Auzeloux P, Cachin F, Eschalier A, Chezal JM, Ardid D, Miot-Noirault E. 99mTc-NTP 15-5 Imaging for Cartilage Involvement in Experimental Rheumatoid Arthritis: Comparison with Routinely Used Molecular Imaging Methods and Sensitivity to Chronic Nonsteroidal Antiinflammatory Drug Treatment. J Nucl Med 2015; 56:798-804. [PMID: 25840975 DOI: 10.2967/jnumed.114.151415] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 02/10/2015] [Indexed: 01/01/2023] Open
Abstract
UNLABELLED This study determined, using the intraarticular complete Freund adjuvant arthritis mice model, whether the radiotracer (99m)Tc-N-(triethylammonium)-3-propyl-[15]ane-N5 ((99m)Tc-NTP 15-5) targeting proteoglycans has a pathophysiologic validity for in vivo imaging of rheumatoid arthritis (RA) and its response to chronic nonsteroidal antiinflammatory drugs. METHODS We investigated the time course of cartilage remodeling by (99m)Tc-NTP 15-5 scintigraphy, bone damages by (99m)Tc-hydroxymethylene diphosphonate imaging, inflammation by (18)F-FDG PET, and joint proteoglycan content and pain behavior in animals, without and with meloxicam treatment. Paw circumference, thermal pain behavior, and histology as well as proteoglycan content of the whole joint were determined. RESULTS (99m)Tc-NTP 15-5 showed specific tracer accumulation within RA joints, with a significant increase in scintigraphic ratio observed in RA versus shams from day 3 to day 28. (18)F-FDG evidenced uptake in RA joints from day 15 to day 29. Animals treated with meloxicam (5 mg/kg) exhibited a dose-dependent decrease in both (99m)Tc-NTP 15-5 and (18)F-FDG uptake ratios versus saline-treated animals. (99m)Tc-hydroxymethylene diphosphonate bone scans were only positive at day 14 in RA versus shams, with a significant effect of meloxicam. An increase in proteoglycans of RA joint and thermal pain behavior were observed and were dose-dependently reduced by meloxicam. CONCLUSION These experimental results bring data in favor of the (99m)Tc-NTP 15-5 radiotracer for assessing, in vivo, cartilage remodeling in RA that could be used to monitor therapy.
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Affiliation(s)
- Amit Khairnar
- Clermont Université, Université d'Auvergne, Imagerie Moléculaire et Thérapie Vectorisée, BP 10448, Clermont-Ferrand, France INSERM, U 990, Clermont-Ferrand, France Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France INSERM U1107 NEURO-DOL, Clermont-Ferrand, France; and
| | - Fabien Marchand
- Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France INSERM U1107 NEURO-DOL, Clermont-Ferrand, France; and
| | - Aurélien Vidal
- Clermont Université, Université d'Auvergne, Imagerie Moléculaire et Thérapie Vectorisée, BP 10448, Clermont-Ferrand, France INSERM, U 990, Clermont-Ferrand, France
| | - Monique Etienne
- Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France INSERM U1107 NEURO-DOL, Clermont-Ferrand, France; and
| | - Imen Miladi
- Clermont Université, Université d'Auvergne, Imagerie Moléculaire et Thérapie Vectorisée, BP 10448, Clermont-Ferrand, France INSERM, U 990, Clermont-Ferrand, France
| | - Philippe Auzeloux
- Clermont Université, Université d'Auvergne, Imagerie Moléculaire et Thérapie Vectorisée, BP 10448, Clermont-Ferrand, France INSERM, U 990, Clermont-Ferrand, France
| | - Florent Cachin
- Clermont Université, Université d'Auvergne, Imagerie Moléculaire et Thérapie Vectorisée, BP 10448, Clermont-Ferrand, France INSERM, U 990, Clermont-Ferrand, France CLCC Jean Perrin, Clermont-Ferrand, France
| | - Alain Eschalier
- Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France INSERM U1107 NEURO-DOL, Clermont-Ferrand, France; and
| | - Jean-Michel Chezal
- Clermont Université, Université d'Auvergne, Imagerie Moléculaire et Thérapie Vectorisée, BP 10448, Clermont-Ferrand, France INSERM, U 990, Clermont-Ferrand, France
| | - Denis Ardid
- Clermont Université, Université d'Auvergne, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France INSERM U1107 NEURO-DOL, Clermont-Ferrand, France; and
| | - Elisabeth Miot-Noirault
- Clermont Université, Université d'Auvergne, Imagerie Moléculaire et Thérapie Vectorisée, BP 10448, Clermont-Ferrand, France INSERM, U 990, Clermont-Ferrand, France
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Corhay JL, Moermans C, Henket M, Nguyen Dang D, Duysinx B, Louis R. Increased of exhaled breath condensate neutrophil chemotaxis in acute exacerbation of COPD. Respir Res 2014; 15:115. [PMID: 25260953 PMCID: PMC4181728 DOI: 10.1186/s12931-014-0115-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 09/09/2014] [Indexed: 12/02/2022] Open
Abstract
Background Neutrophils have been involved in the pathogenesis of chronic obstructive pulmonary disease (COPD). Underlying mechanisms of neutrophil accumulation in the airways of stable and exacerbated COPD patients are poorly understood. The aim of this study was to assess exhaled breath condensate (EBC) neutrophil chemotactic activity, the level of two chemoattractants for neutrophils (GRO-α and LTB4) during the course of an acute exacerbation of COPD (AECOPD). Methods 50 ex smoking COPD patients (33 with acute exacerbation and 17 in stable disease) and 20 matched ex smoking healthy controls were compared. EBC was collected by using a commercially available condenser (EcoScreen®). EBC neutrophil chemotactic activity (NCA) was assessed by using Boyden microchambers. Chemotactic index (CI) was used to evaluate cell migration. LTB4 and GROα levels were measured by a specific enzyme immunoassay in EBC. Results Stable COPD and outpatients with AECOPD, but not hospitalized with AECOPD, had raised EBC NCA compared to healthy subjects (p < 0.05 and p < 0.01 respectively). In outpatients with AECOPD EBC NCA significantly decreased 6 weeks after the exacerbation. Overall EBC NCA was weakly correlated with sputum neutrophil counts (r = 0.26, p < 0.05). EBC LTB4 levels were increased in all groups of COPD compared to healthy subjects while GRO-α was only raised in patients with AECOPD. Furthermore, EBC LTB4 and GRO-α significantly decreased after recovery of the acute exacerbation. Increasing concentrations (0.1 to 10 μg/mL) of anti- human GRO-α monoclonal antibody had no effect on EBC neutrophil chemotactic activity of 10 exacerbated COPD patients. Conclusions EBC NCA rose during acute exacerbation of COPD in ambulatory patients and decreased at recovery. While LTB4 seems to play a role both in stable and in exacerbated phase of the disease, the role of GRO-α as a chemotactic factor during AECOPD is not clearly established and needs further investigation.
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Huang YL, Liu XL, Xu N, Xiao YJ, Gao GL. Expression and function of CXCR2, CXCR7 of acute leukemic cells in rat. ASIAN PAC J TROP MED 2014; 7:417-20. [PMID: 25063073 DOI: 10.1016/s1995-7645(14)60068-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 01/15/2014] [Accepted: 03/15/2014] [Indexed: 10/25/2022] Open
Abstract
OBJECTIVE To investigate the expression and function of chemokine receptor CXCR2 and CXCR7 in the rat with acute leukemia. METHODS Flow cytometry and RT-PCR were used to detect the CXCR2, CXCR7 expression on the bone marrow cell surface of the acute leukemia group and the control group. RESULTS The bone marrow cell surface CXCR2, CXCR7 relative fluorescence intensity of the observation group was significantly higher than the control group (P<0.05). The CXCR7 expression of the extramedullary infiltration group was significantly higher than non-extramedullary infiltration group (P<0.05). The CXCR2, CXCR7mRNA median expression level of the observation group was higher than the control group. The CXCR2 expression and CXCR7 expression of the observation group was positively correlated, and the correlation coefficient was 0.782 (P<0.01). CONCLUSIONS The chemokine receptor CXCR2 and CXCR7 are highly expressed in acute leukemia, which may be associated with the occurrence of leukemia.
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Affiliation(s)
- Yuan-Lu Huang
- Hematological Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Xiao-Li Liu
- Hematological Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
| | - Na Xu
- Hematological Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Ya-Juan Xiao
- Hematological Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Guan-Lun Gao
- Hematological Department, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
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Hao J, Huang YM, Zhao MH, Chen M. The interaction between C5a and sphingosine-1-phosphate in neutrophils for antineutrophil cytoplasmic antibody mediated activation. Arthritis Res Ther 2014; 16:R142. [PMID: 25000985 PMCID: PMC4227110 DOI: 10.1186/ar4604] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 07/01/2014] [Indexed: 12/17/2022] Open
Abstract
Introduction C5a plays an crucial role in antineutrophil cytoplasmic antibody (ANCA)-mediated neutrophil recruitment and activation. The current study further investigated the interaction between C5a and sphingosine-1-phosphate (S1P) in neutrophils for ANCA-mediated activation. Methods The plasma levels of S1P from 29 patients with ANCA-associated vasculitis (AAV) in active stage and in remission were tested by enzyme-linked immunosorbent assay (ELISA). The generation of S1P was tested in C5a-triggered neutrophils. The effect S1P receptor antagonist was tested on respiratory burst and degranulation of C5a-primed neutrophils activated with ANCA. Results The plasma level of circulating S1P was significantly higher in patients with AAV with active disease compared with patients in remission (2034.2 ± 438.5 versus 1489.3 ± 547.4 nmol/L, P < 0.001). S1P can prime neutrophils for ANCA-induced respiratory burst and degranulation. Compared with non-triggered neutrophils, the mean fluorescence intensity (MFI) value for CD88 expression was up-regulated significantly in S1P-triggered neutrophils. S1P receptor antagonist decreased oxygen radical production in C5a primed neutrophils induced by ANCA-positive IgG from patients. Blocking S1P inhibited C5a-primed neutrophil migration. Conclusions S1P triggered by C5a-primed neutrophils could further activate neutrophils. Blocking S1P could attenuate C5a-induced activation of neutrophils by ANCA. The interaction between S1P and C5a plays an important role in neutrophils for ANCA-mediated activation.
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Figueroa CD, Matus CE, Pavicic F, Sarmiento J, Hidalgo MA, Burgos RA, Gonzalez CB, Bhoola KD, Ehrenfeld P. Kinin B1 receptor regulates interactions between neutrophils and endothelial cells by modulating the levels of Mac-1, LFA-1 and intercellular adhesion molecule-1. Innate Immun 2014; 21:289-304. [PMID: 24728914 DOI: 10.1177/1753425914529169] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Kinins are pro-inflammatory peptides that mimic the cardinal features of inflammation. We examined the concept that expression levels of endothelial intercellular adhesion molecule-1 (ICAM-1) and neutrophil integrins Mac-1 and LFA-1 are modulated by the kinin B1 receptor (B1R) agonist, Lys-des[Arg(9)]bradykinin (LDBK). Stimulation of endothelial cells with LDBK increased the levels of ICAM-1 mRNA transcripts/protein, and also of E-selectin and platelet endothelial adhesion molecule-1. ICAM-1 levels increased in a magnitude comparable with that produced by TNF-α. This stimulatory effect was reduced when endothelial cells, which had been previously transfected with a B1R small interfering RNA, were stimulated with LDBK, under comparable conditions. Similarly, LDBK produced a significant increase in protein levels of LFA-1 and Mac-1 integrins in human neutrophils, an effect that was reversed by pretreatment of cells with 10 µg/ml cycloheximide or a B1R antagonist. Functional experiments performed with post-confluent monolayers of endothelial cells stimulated with LDBK and neutrophils primed with TNF-α, and vice versa, resulted in enhanced adhesiveness between both cells. Neutralizing Abs to ICAM-1 and Mac-1 reduced the adhesion between them. Our results indicate that kinin B1R is a novel modulator that promotes adhesion of leukocytes to endothelial cells, critically enhancing the movement of neutrophils from the circulation to sites of inflammation.
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Affiliation(s)
- Carlos D Figueroa
- Laboratorio de Patologia Celular, Instituto de Anatomia, Histologia y Patologia, Universidad Austral de Chile, Valdivia, Chile
| | - Carola E Matus
- Laboratorio de Patologia Celular, Instituto de Anatomia, Histologia y Patologia, Universidad Austral de Chile, Valdivia, Chile
| | - Francisca Pavicic
- Laboratorio de Patologia Celular, Instituto de Anatomia, Histologia y Patologia, Universidad Austral de Chile, Valdivia, Chile
| | - Jose Sarmiento
- Instituto de Fisiologia, Universidad Austral de Chile, Valdivia, Chile
| | - Maria A Hidalgo
- Instituto de Farmacologia y Morfofisiologia, Universidad Austral de Chile, Valdivia, Chile
| | - Rafael A Burgos
- Instituto de Farmacologia y Morfofisiologia, Universidad Austral de Chile, Valdivia, Chile
| | - Carlos B Gonzalez
- Instituto de Fisiologia, Universidad Austral de Chile, Valdivia, Chile
| | - Kanti D Bhoola
- Laboratorio de Patologia Celular, Instituto de Anatomia, Histologia y Patologia, Universidad Austral de Chile, Valdivia, Chile
| | - Pamela Ehrenfeld
- Laboratorio de Patologia Celular, Instituto de Anatomia, Histologia y Patologia, Universidad Austral de Chile, Valdivia, Chile
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de Oliveira S, Reyes-Aldasoro CC, Candel S, Renshaw SA, Mulero V, Calado Â. Cxcl8 (IL-8) mediates neutrophil recruitment and behavior in the zebrafish inflammatory response. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2013; 190:4349-59. [PMID: 23509368 PMCID: PMC3736093 DOI: 10.4049/jimmunol.1203266] [Citation(s) in RCA: 244] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Neutrophils play a pivotal role in the innate immune response. The small cytokine CXCL8 (also known as IL-8) is known to be one of the most potent chemoattractant molecules that, among several other functions, is responsible for guiding neutrophils through the tissue matrix until they reach sites of injury. Unlike mice and rats that lack a CXCL8 homolog, zebrafish has two distinct CXCL8 homologs: Cxcl8-l1 and Cxcl8-l2. Cxcl8-l1 is known to be upregulated under inflammatory conditions caused by bacterial or chemical insult but until now the role of Cxcl8s in neutrophil recruitment has not been studied. In this study we show that both Cxcl8 genes are upregulated in response to an acute inflammatory stimulus, and that both are crucial for normal neutrophil recruitment to the wound and normal resolution of inflammation. Additionally, we have analyzed neutrophil migratory behavior through tissues to the site of injury in vivo, using open-access phagocyte tracking software PhagoSight. Surprisingly, we observed that in the absence of these chemokines, the speed of the neutrophils migrating to the wound was significantly increased in comparison with control neutrophils, although the directionality was not affected. Our analysis suggests that zebrafish may possess a subpopulation of neutrophils whose recruitment to inflamed areas occurs independently of Cxcl8 chemokines. Moreover, we report that Cxcl8-l2 signaled through Cxcr2 for inducing neutrophil recruitment. Our study, therefore, confirms the zebrafish as an excellent in vivo model to shed light on the roles of CXCL8 in neutrophil biology.
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Affiliation(s)
- Sofia de Oliveira
- Unidade de Biologia Microvascular e Inflamação, Instituto de Medicina Molecular, Instituto de Bioquímica, Faculdade de Medicina, Universidade de Lisboa, Lisboa-Portugal
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia, Murcia-Spain
| | - Constantino C. Reyes-Aldasoro
- Biomedical Engineering Research Group, School of Engineering and Design, University of Sussex, Brighton BN1 9QT – United Kingdom
| | - Sergio Candel
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia, Murcia-Spain
| | - Stephen A. Renshaw
- MRC Centre for Developmental and Biomedical Genetics, University of Sheffield, Firth Court, Western Bank, Sheffield – United Kingdom
| | - Victoriano Mulero
- Department of Cell Biology and Histology, Faculty of Biology, University of Murcia, Murcia-Spain
| | - Ângelo Calado
- Unidade de Biologia Microvascular e Inflamação, Instituto de Medicina Molecular, Instituto de Bioquímica, Faculdade de Medicina, Universidade de Lisboa, Lisboa-Portugal
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Put S, Schoonooghe S, Devoogdt N, Schurgers E, Avau A, Mitera T, D'Huyvetter M, De Baetselier P, Raes G, Lahoutte T, Matthys P. SPECT imaging of joint inflammation with Nanobodies targeting the macrophage mannose receptor in a mouse model for rheumatoid arthritis. J Nucl Med 2013; 54:807-14. [PMID: 23447654 DOI: 10.2967/jnumed.112.111781] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
UNLABELLED Rheumatoid arthritis (RA) is a chronic autoimmune disease occurring in approximately 1% of the worldwide population. The disease primarily affects the joints, where inflammatory cells, such as macrophages, invade the synovium and cause cartilage and bone destruction. Currently, it is difficult to efficiently diagnose and monitor early-stage RA. In this study, we investigated whether SPECT/micro-CT imaging with (99m)Tc-labeled Nanobodies directed against the macrophage mannose receptor (MMR) is a useful tool for monitoring and quantifying joint inflammation in collagen-induced arthritis (CIA), a mouse model for RA. The expression of MMR was analyzed on macrophages and osteoclasts generated in vitro and in cells obtained from various organs from mice with CIA. METHODS CIA was induced in DBA/1 mice by injection of collagen type II in complete Freund adjuvant, and cell suspensions from the inflamed joints and other organs were obtained. Macrophages and osteoclasts were generated in vitro from bone marrow cells. Expression of MMR was quantified by quantitative polymerase chain reaction and flow cytometry with specific Nanobodies and conventional antibodies. SPECT/micro-CT imaging was performed with (99m)Tc-labeled MMR and control Nanobodies. RESULTS MMR was highly expressed on macrophages and to a lesser extent on osteoclasts generated in vitro. In mice with CIA, MMR expression was detected on cells from the bone marrow, lymph nodes, and spleen. In synovial fluid of arthritic joints, MMR was expressed on CD11b(+)F4/80(+) macrophages. On in vivo SPECT/micro-CT imaging with consecutive injections of MMR and control Nanobodies, a strong MMR signal was seen in the knees, ankles, and toes of arthritic mice. Quantification of the SPECT imaging confirmed the specificity of the MMR signal in inflamed joints as compared with the control Nanobody. Dissection of the paws revealed an additional significant MMR signal in nonarthritic paws of affected mice (i.e., mice displaying symptoms of arthritis in other paws). CONCLUSION Our data show that MMR is expressed on macrophages in vitro and in vivo in synovial fluid of inflamed paws, whereas expression is relatively low in other tissues. The use of Nanobodies against MMR in SPECT/micro-CT imaging generates the possibility to track inflammatory cells in vivo in arthritic joints.
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Affiliation(s)
- Stéphanie Put
- Laboratory of Immunobiology, Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium
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Fuchs K, Kohlhofer U, Quintanilla-Martinez L, Lamparter D, Kötter I, Reischl G, Röcken M, Pichler BJ, Kneilling M. In vivo imaging of cell proliferation enables the detection of the extent of experimental rheumatoid arthritis by 3'-deoxy-3'-18f-fluorothymidine and small-animal PET. J Nucl Med 2012; 54:151-8. [PMID: 23213198 DOI: 10.2967/jnumed.112.106740] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
UNLABELLED The aim of this work was to study the feasibility of measuring cell proliferation noninvasively in vivo during different stages of experimental arthritis using the PET proliferation tracer 3'-deoxy-3'-(18)F-fluorothymidine ((18)F-FLT). METHODS We injected mice with serum containing glucose-6-phosphate-isomerase-specific antibodies to induce experimental arthritis, and we injected control mice with control serum. Animals injected with (18)F-FLT 1, 3, 6, and 8 d after the onset of disease were analyzed in vivo by PET, PET/CT, or PET/MR imaging followed by autoradiography analysis. The (18)F-FLT uptake in the ankles and forepaws was quantified on the basis of the PET images by drawing standardized regions of interest. To correlate the in vivo PET data with cell proliferation, we performed Ki-67 immunohistochemistry of diseased and healthy joints at the corresponding time points. RESULTS Analysis of the different stages of arthritic joint disease revealed enhanced (18)F-FLT uptake in arthritic ankles (2.2 ± 0.2 percentage injected dose per gram [%ID/g]) and forepaws (2.1 ± 0.3 %ID/g), compared with healthy ankles (1.4 ± 0.3 %ID/g) and forepaws (1.5 ± 0.5 %ID/g), as early as 1 d after the glucose-6-phosphate-isomerase serum injection, a time point characterized by clear histologic signs of arthritis but only slight ankle swelling. The (18)F-FLT uptake in the ankles (3.5 ± 0.3 %ID/g) reached the maximum observed level at day 8. Ki-67 immunohistochemical staining of the arthritic ankles and forepaws revealed a strong correlation with the in vivo (18)F-FLT PET data. PET/CT and PET/MR imaging measurements enabled us to identify whether the (18)F-FLT uptake was located in the bone or the soft tissue. CONCLUSION Noninvasive in vivo measurement of cell proliferation in experimental arthritis using (18)F-FLT PET is a promising tool to investigate the extent of arthritic joint inflammation.
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Affiliation(s)
- Kerstin Fuchs
- Laboratory for Preclinical Imaging and Imaging Technology of the Werner Siemens-Foundation, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University, Tübingen, Germany
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Halbwachs L, Lesavre P. Endothelium-neutrophil interactions in ANCA-associated diseases. J Am Soc Nephrol 2012; 23:1449-61. [PMID: 22942199 DOI: 10.1681/asn.2012020119] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The two salient features of ANCA-associated vasculitis (AAV) are the restricted microvessel localization and the mechanism of inflammatory damage, independent of vascular immune deposits. The microvessel localization of the disease is due to the ANCA antigen accessibility, which is restricted to the membrane of neutrophils engaged in β2-integrin-mediated adhesion, while these antigens are cytoplasmic and inaccessible in resting neutrophils. The inflammatory vascular damage is the consequence of maximal proinflammatory responses of neutrophils, which face cumulative stimulations by TNF-α, β2-integrin engagement, C5a, and ANCA by the FcγRII receptor. This results in the premature intravascular explosive release by adherent neutrophils of all of their available weapons, normally designed to kill IgG-opsonized bacteria after migration in infected tissues.
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Affiliation(s)
- Lise Halbwachs
- Institut National de la Santé et de la Recherche Medicale INSERM U845, Université Paris Descartes, Sorbonne Paris Cité, France
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Orlik B, Handzlik G, Olszanecka-Glinianowicz M. [The role of adipokines and insulin resistance in the pathogenesis of nonalcoholic fatty liver disease]. Thromb Haemost 2010; 109:399-406. [PMID: 20498498 DOI: 10.1160/th12-09-0703] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 12/15/2012] [Indexed: 12/15/2022]
Abstract
Nonalcoholic fatty liver disease (NAFLD) develops in 17-33% of the population of developed countries. The incidence of NAFLD is constantly growing due to the increasing prevalence of obesity. It is estimated that one third of subjects with NAFLD suffer from nonalcoholic steatohepatitis (NASH) and 15% of them develop liver cirrhosis within a five-year period. In recent years this important complication of obesity became the subject of numerous studies. It, the pathogenesis of NAFLD is still unclear. A key role in the development of this disease was attributed to insulin resistance. Hormones and cytokines produced by adipose tissue called adipokines may be a link between obesity, insulin resistance, and NAFLD. However, it is well known that increased levels of adipokines such as TNF-alpha, IL-6, and resistin and a decreased level of adiponectin augment inflammation in the liver. Further studies are necessary to explain the roles of leptin, visfatin, retinol binding protein-4, omentin, and vaspin in the pathogenesis of NAFLD. The aim this paper is to introduce new areas of study on the pathogenesis of NAFLD.
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Affiliation(s)
- Bartłomiej Orlik
- Studenckie Koło Naukowe przy Katedrze Patofizjologii Slaskiego Uniwersytetu Medycznego w Katowicach
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