1
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Clayton SW, Sebastian A, Wilson SP, Hum NR, Walk RE, Easson GWD, Vaidya R, Broz KS, Loots GG, Tang SY. Single cell RNA sequencing reveals a shift in cell function and maturation of endogenous and infiltrating cell types in response to acute intervertebral disc injury. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.08.10.607363. [PMID: 39149307 PMCID: PMC11326235 DOI: 10.1101/2024.08.10.607363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Intervertebral disc (IVD) degeneration contributes to disabling back pain. Degeneration can be initiated by injury and progressively leads to irreversible cell loss and loss of IVD function. Attempts to restore IVD function through cell replacement therapies have had limited success due to knowledge gaps in critical cell populations and molecular crosstalk after injury. Here, we used single cell RNA sequencing to identify the transcriptional changes of endogenous and infiltrating IVD cell populations, as well as the potential of resident mesenchymal stem cells (MSCs) for tissue repair. Control and Injured (needle puncture) tail IVDs were extracted from 12 week old female C57BL/6 mice 7 days post injury and clustering analyses, gene ontology, and pseudotime trajectory analyses were used to determine transcriptomic divergences in the cells of the injured IVD, while immunofluorescence was utilized to determine mesenchymal stem cell (MSC) localization. Clustering analysis revealed 11 distinct cell populations that were IVD tissue specific, immune, or vascular cells. Differential gene expression analysis determined that Outer Annulus Fibrosus, Neutrophils, Saa2-High MSCs, Macrophages, and Krt18+ Nucleus Pulposus (NP) cells were the major drivers of transcriptomic differences between Control and Injured cells. Gene ontology of DEGs suggested that the most upregulated biological pathways were angiogenesis and T cell related while wound healing and ECM regulation categories were downregulated. Pseudotime trajectory analyses revealed that cells were driven towards increased cell differentiation due to IVD injury in all IVD tissue clusters except for Krt18+ NP which remained in a less mature cell state. Saa2-High and Grem1-High MSCs populations drifted towards more IVD differentiated cells profiles with injury and localized distinctly within the IVD. This study strengthens the understanding of heterogeneous IVD cell populations response to injury and identifies targetable MSC populations for future IVD repair studies.
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Affiliation(s)
| | - Aimy Sebastian
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore CA
| | - Stephen P Wilson
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore CA
| | - Nicholas R Hum
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore CA
| | - Remy E Walk
- Washington University in St. Louis, St. Louis MO
| | | | | | | | - Gabriela G Loots
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore CA
- Department of Orthopaedic Surgery, University of California Davis Health, Sacramento, CA, United States
| | - Simon Y Tang
- Washington University in St. Louis, St. Louis MO
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2
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Kapanadze T, Gamrekelashvili J, Sablotny S, Schroth FN, Xu Y, Chen R, Rong S, Shushakova N, Gueler F, Haller H, Limbourg FP. Validation of CSF-1 receptor (CD115) staining for analysis of murine monocytes by flow cytometry. J Leukoc Biol 2024; 115:573-582. [PMID: 38038378 DOI: 10.1093/jleuko/qiad147] [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: 11/04/2022] [Revised: 10/18/2023] [Accepted: 11/09/2023] [Indexed: 12/02/2023] Open
Abstract
CD115, the receptor for colony stimulating factor 1, is essential for survival and differentiation of monocytes and macrophages and is therefore frequently used to define monocyte subsets and their progenitors in immunological assays. However, CD115 surface expression and detection by flow cytometry is greatly influenced by cell isolation and processing methods, organ source, and disease context. In a systematic analysis of murine monocytes, we define experimental conditions that preserve or limit CD115 surface expression and staining by flow cytometry. We also find that, independent of conditions, CD115 surface levels are consistently lower in Ly6Clo monocytes than in Ly6Chi monocytes, with the exception of Ly6Clo monocytes in the bone marrow. Furthermore, in contrast to IL-34, the presence of colony stimulating factor 1 impairs CD115 antibody staining in a dose-dependent manner, which, in a model of ischemic kidney injury with elevated levels of colony stimulating factor 1, influenced quantification of kidney monocytes. Thus, staining and experimental conditions affect quantitative and qualitative analysis of monocytes and may influence experimental conclusions.
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Affiliation(s)
- Tamar Kapanadze
- Vascular Medicine Research, Department of Nephrology and Hypertension, Hannover Medical School, Hannover, D 30625, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
| | - Jaba Gamrekelashvili
- Vascular Medicine Research, Department of Nephrology and Hypertension, Hannover Medical School, Hannover, D 30625, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
| | - Stefan Sablotny
- Vascular Medicine Research, Department of Nephrology and Hypertension, Hannover Medical School, Hannover, D 30625, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
| | - Frauline Nicole Schroth
- Vascular Medicine Research, Department of Nephrology and Hypertension, Hannover Medical School, Hannover, D 30625, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
| | - Yuangao Xu
- Vascular Medicine Research, Department of Nephrology and Hypertension, Hannover Medical School, Hannover, D 30625, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
| | - Rongjun Chen
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
| | - Song Rong
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
| | - Nelli Shushakova
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
- Phenos GmbH, Hannover, Germany
| | - Faikah Gueler
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
| | - Hermann Haller
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
| | - Florian P Limbourg
- Vascular Medicine Research, Department of Nephrology and Hypertension, Hannover Medical School, Hannover, D 30625, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover D 30625, Germany
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3
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Martin MD, Skon-Hegg C, Kim CY, Xu J, Kucaba TA, Swanson W, Pierson MJ, Williams JW, Badovinac VP, Shen SS, Ingersoll MA, Griffith TS. CD115 + monocytes protect microbially experienced mice against E. coli-induced sepsis. Cell Rep 2023; 42:113345. [PMID: 38111515 PMCID: PMC10727454 DOI: 10.1016/j.celrep.2023.113345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023] Open
Abstract
Uropathogenic E. coli (UPEC) is a primary organism responsible for urinary tract infections and a common cause of sepsis. Microbially experienced laboratory mice, generated by cohousing with pet store mice, exhibit increased morbidity and mortality to polymicrobial sepsis or lipopolysaccharide challenge. By contrast, cohoused mice display significant resistance, compared with specific pathogen-free mice, to a monomicrobial sepsis model using UPEC. CD115+ monocytes mediate protection in the cohoused mice, as depletion of these cells leads to increased mortality and UPEC pathogen burden. Further study of the cohoused mice reveals increased TNF-α production by monocytes, a skewing toward Ly6ChiCD115+ "classical" monocytes, and enhanced egress of Ly6ChiCD115+ monocytes from the bone marrow. Analysis of cohoused bone marrow also finds increased frequency and number of myeloid multipotent progenitor cells. These results show that a history of microbial exposure impacts innate immunity in mice, which can have important implications for the preclinical study of sepsis.
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Affiliation(s)
- Matthew D. Martin
- Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
- These authors contributed equally
| | - Cara Skon-Hegg
- Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
- These authors contributed equally
| | - Caleb Y. Kim
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
- Microbiology, Immunology, and Cancer Biology Graduate Program, University of Minnesota, Minneapolis, MN 55455, USA
| | - Julie Xu
- Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Tamara A. Kucaba
- Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Whitney Swanson
- Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Mark J. Pierson
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Jesse W. Williams
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Vladimir P. Badovinac
- Department of Pathology, University of Iowa, Iowa City, IA 52242, USA
- Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, IA 52242, USA
| | - Steven S. Shen
- Institute for Health Informatics, University of Minnesota, Minneapolis, MN 55455, USA
| | - Molly A. Ingersoll
- Université Paris Cité, Institut Cochin, INSERM U1016, CNRS UMR 8104, 75014 Paris, France
- Mucosal Inflammation and Immunity, Department of Immunology, Institut Pasteur, Inserm U1223, 75015 Paris, France
| | - Thomas S. Griffith
- Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA
- Microbiology, Immunology, and Cancer Biology Graduate Program, University of Minnesota, Minneapolis, MN 55455, USA
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Minneapolis VA Health Care System, Minneapolis, MN 55417, USA
- Lead contact
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4
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Zou Y, Kamada N, Seong SY, Seo SU. CD115 - monocytic myeloid-derived suppressor cells are precursors of OLFM4 high polymorphonuclear myeloid-derived suppressor cells. Commun Biol 2023; 6:272. [PMID: 36922564 PMCID: PMC10017706 DOI: 10.1038/s42003-023-04650-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 03/02/2023] [Indexed: 03/18/2023] Open
Abstract
Myeloid-derived suppressor cells (MDSCs) consist of monocytic (M-) MDSCs and polymorphonuclear (PMN-) MDSCs that contribute to an immunosuppressive environment in tumor-bearing hosts. However, research on the phenotypic and functional heterogeneity of MDSCs in tumor-bearing hosts and across different disease stage is limited. Here we subdivide M-MDSCs based on CD115 expression and report that CD115- M-MDSCs are functionally distinct from CD115+ M-MDSCs. CD115- M-MDSCs increased in bone marrow and blood as tumors progressed. Transcriptome analysis revealed that CD115- M-MDSCs expressed higher levels of neutrophil-related genes. Moreover, isolated CD115- M-MDSCs had higher potential to be differentiated into PMN-MDSCs compared with CD115+ M-MDSCs. Of note, CD115- M-MDSCs were able to differentiate into both olfactomedin 4 (OLFM4)hi and OLFM4lo PMN-MDSCs, whereas CD115+ M-MDSCs differentiated into a smaller proportion of OLFM4lo PMN-MDSCs. In vivo, M-MDSC to PMN-MDSC differentiation occurred most frequently in bone marrow while M-MDSCs preferentially differentiated into tumor-associated macrophages in the tumor mass. Our study reveals the presence of previously unrecognized subtypes of CD115- M-MDSCs in tumor-bearing hosts and demonstrates their cellular plasticity during tumorigenesis.
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Affiliation(s)
- Yunyun Zou
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
- Wide River Institute of Immunology, Seoul National University College of Medicine, Hongcheon, Republic of Korea
| | - Nobuhiko Kamada
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA
| | - Seung-Yong Seong
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea.
- Wide River Institute of Immunology, Seoul National University College of Medicine, Hongcheon, Republic of Korea.
| | - Sang-Uk Seo
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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5
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Nomura A, Mizuno M, Noto D, Aoyama A, Kuga T, Murayama G, Chiba A, Miyake S. Different Spatial and Temporal Roles of Monocytes and Monocyte-Derived Cells in the Pathogenesis of an Imiquimod Induced Lupus Model. Front Immunol 2022; 13:764557. [PMID: 35371102 PMCID: PMC8964788 DOI: 10.3389/fimmu.2022.764557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 02/21/2022] [Indexed: 12/03/2022] Open
Abstract
Mounting evidence indicates the importance of aberrant Toll-like receptor 7 (TLR7) signaling in the pathogenesis of systemic lupus erythematosus (SLE). However, the mechanism of disease progression remains unclear. An imiquimod (IMQ)-induced lupus model was used to analyze the lupus mechanism related to the aberrant TLR7 signals. C57BL/6 mice and NZB/NZW mice were treated with topical IMQ, and peripheral blood, draining lymph nodes, and kidneys were analyzed focusing on monocytes and monocyte-related cells. Monocytes expressed intermediate to high levels of TLR7, and the long-term application of IMQ increased Ly6Clo monocytes in the peripheral blood and Ly6Clo monocyte-like cells in the lymph nodes and kidneys, whereas Ly6Chi monocyte-like cell numbers were increased in lymph nodes. Ly6Clo monocyte-like cells in the kidneys of IMQ-induced lupus mice were supplied by bone marrow-derived cells as demonstrated using a bone marrow chimera. Ly6Clo monocytes obtained from IMQ-induced lupus mice had upregulated adhesion molecule-related genes, and after adoptive transfer, they showed greater infiltration into the kidneys compared with controls. RNA-seq and post hoc PCR analyses revealed Ly6Clo monocyte-like cells in the kidneys of IMQ-induced lupus mice had upregulated macrophage-related genes compared with peripheral blood Ly6Clo monocytes and downregulated genes compared with kidney macrophages (MF). Ly6Clo monocyte-like cells in the kidneys upregulated Il6 and chemoattracting genes including Ccl5 and Cxcl13. The higher expression of Il6 in Ly6Clo monocyte-like cells compared with MF suggested these cells were more inflammatory than MF. However, MF in IMQ-induced lupus mice were characterized by their high expression of Cxcl13. Genes of proinflammatory cytokines in Ly6Chi and Ly6Clo monocytes were upregulated by stimulation with IMQ but only Ly6Chi monocytes upregulated IFN-α genes upon stimulation with 2′3′-cyclic-GMP-AMP, an agonist of stimulator of interferon genes. Ly6Chi and Ly6Clo monocytes in IMQ-induced lupus mice had different features. Ly6Chi monocytes responded in the lymph nodes of locally stimulated sites and had a higher expression of IFN-α upon stimulation, whereas Ly6Clo monocytes were induced slowly and tended to infiltrate into the kidneys. Infiltrated monocytes in the kidneys likely followed a trajectory through inflammatory monocyte-like cells to MF, which were then involved in the development of nephritis.
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Affiliation(s)
- Atsushi Nomura
- Department of Immunology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Miho Mizuno
- Department of Immunology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Daisuke Noto
- Department of Immunology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Aki Aoyama
- Department of Immunology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Taiga Kuga
- Department of Immunology, Juntendo University Graduate School of Medicine, Tokyo, Japan.,Department of Internal Medicine and Rheumatology, Juntendo University School of Medicine, Tokyo, Japan
| | - Goh Murayama
- Department of Immunology, Juntendo University Graduate School of Medicine, Tokyo, Japan.,Department of Internal Medicine and Rheumatology, Juntendo University School of Medicine, Tokyo, Japan
| | - Asako Chiba
- Department of Immunology, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Sachiko Miyake
- Department of Immunology, Juntendo University Graduate School of Medicine, Tokyo, Japan
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6
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Bottermann K, Kalfhues L, Nederlof R, Hemmers A, Leitner LM, Oenarto V, Nemmer J, Pfeffer M, Raje V, Deenen R, Petzsch P, Zabri H, Köhrer K, Reichert AS, Grandoch M, Fischer JW, Herebian D, Stegbauer J, Harris TE, Gödecke A. Cardiomyocyte p38 MAPKα suppresses a heart-adipose tissue-neutrophil crosstalk in heart failure development. Basic Res Cardiol 2022; 117:48. [PMID: 36205817 PMCID: PMC9542472 DOI: 10.1007/s00395-022-00955-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 09/05/2022] [Accepted: 09/18/2022] [Indexed: 01/31/2023]
Abstract
Although p38 MAP Kinase α (p38 MAPKα) is generally accepted to play a central role in the cardiac stress response, to date its function in maladaptive cardiac hypertrophy is still not unambiguously defined. To induce a pathological type of cardiac hypertrophy we infused angiotensin II (AngII) for 2 days via osmotic mini pumps in control and tamoxifen-inducible, cardiomyocyte (CM)-specific p38 MAPKα KO mice (iCMp38αKO) and assessed cardiac function by echocardiography, complemented by transcriptomic, histological, and immune cell analysis. AngII treatment after inactivation of p38 MAPKα in CM results in left ventricular (LV) dilatation within 48 h (EDV: BL: 83.8 ± 22.5 µl, 48 h AngII: 109.7 ± 14.6 µl) and an ectopic lipid deposition in cardiomyocytes, reflecting a metabolic dysfunction in pressure overload (PO). This was accompanied by a concerted downregulation of transcripts for oxidative phosphorylation, TCA cycle, and fatty acid metabolism. Cardiac inflammation involving neutrophils, macrophages, B- and T-cells was significantly enhanced. Inhibition of adipose tissue lipolysis by the small molecule inhibitor of adipocytetriglyceride lipase (ATGL) Atglistatin reduced cardiac lipid accumulation by 70% and neutrophil infiltration by 30% and went along with an improved cardiac function. Direct targeting of neutrophils by means of anti Ly6G-antibody administration in vivo led to a reduced LV dilation in iCMp38αKO mice and an improved systolic function (EF: 39.27 ± 14%). Thus, adipose tissue lipolysis and CM lipid accumulation augmented cardiac inflammation in iCMp38αKO mice. Neutrophils, in particular, triggered the rapid left ventricular dilatation. We provide the first evidence that p38 MAPKα acts as an essential switch in cardiac adaptation to PO by mitigating metabolic dysfunction and inflammation. Moreover, we identified a heart-adipose tissue-immune cell crosstalk, which might serve as new therapeutic target in cardiac pathologies.
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Affiliation(s)
- Katharina Bottermann
- Institute of Cardiovascular Physiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
- Institute of Pharmacology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Lisa Kalfhues
- Institute of Cardiovascular Physiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Rianne Nederlof
- Institute of Cardiovascular Physiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Anne Hemmers
- Institute of Cardiovascular Physiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Lucia M Leitner
- Institute of Cardiovascular Physiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Vici Oenarto
- Institute of Cardiovascular Physiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Jana Nemmer
- Institute of Cardiovascular Physiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Mirjam Pfeffer
- Institute of Cardiovascular Physiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Vidisha Raje
- Department of Pharmacology, University of Virginia Health System, Charlottesville, VA, 22908, USA
| | - Rene Deenen
- Biological and Medical Research Center (BMFZ), Medical Faculty, Heinrich-Heine-University, Universitätsstraße 1, 40225, Duesseldorf, Germany
| | - Patrick Petzsch
- Biological and Medical Research Center (BMFZ), Medical Faculty, Heinrich-Heine-University, Universitätsstraße 1, 40225, Duesseldorf, Germany
| | - Heba Zabri
- Institute of Pharmacology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Karl Köhrer
- Biological and Medical Research Center (BMFZ), Medical Faculty, Heinrich-Heine-University, Universitätsstraße 1, 40225, Duesseldorf, Germany
| | - Andreas S Reichert
- Institute of Biochemistry and Molecular Biology I, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Maria Grandoch
- Institute of Translational Pharmacology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Jens W Fischer
- Institute of Pharmacology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
- CARID-Cardiovascular Research Institute Düsseldorf, Medical Faculty, Heinrich-Heine-University, Universitätsstraße 1, 40225, Duesseldorf, Germany
| | - Diran Herebian
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Johannes Stegbauer
- Department of Nephrology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany
| | - Thurl E Harris
- Department of Pharmacology, University of Virginia Health System, Charlottesville, VA, 22908, USA
| | - Axel Gödecke
- Institute of Cardiovascular Physiology, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Postfach 101007, 40001, Düsseldorf, Germany.
- CARID-Cardiovascular Research Institute Düsseldorf, Medical Faculty, Heinrich-Heine-University, Universitätsstraße 1, 40225, Duesseldorf, Germany.
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7
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Kim AR, Bak EJ, Yoo YJ. Distribution of neutrophil and monocyte/macrophage populations induced by the CXCR4 inhibitor AMD3100 in blood and periodontal tissue early after periodontitis induction. J Periodontal Res 2021; 57:332-340. [PMID: 34927238 DOI: 10.1111/jre.12963] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/16/2021] [Accepted: 10/12/2021] [Indexed: 12/12/2022]
Abstract
CXCR4, a CXCL12 receptor, is expressed on epithelial cells, fibroblasts, and inflammatory cells. The CXCR4-CXCL12 interaction is related to the migration of neutrophils and monocytes/macrophages. Periodontitis, an inflammatory disease mainly caused by gram-negative bacteria, is characterized by infiltration of circulating inflammatory cells and alveolar bone (AB) loss. To investigate whether CXCR4 is involved in the distribution of neutrophils and monocytes/macrophages early after periodontitis induction, we examined the effects of AMD3100 (AMD), a CXCR4 antagonist, in ligature-induced periodontitis mice and LPS-injected air pouch mice. The periodontitis study was accomplished in control (C), periodontitis (P), and P + AMD groups. Periodontitis was induced by ligation of the mandibular first molar. AMD was intraperitoneally administered daily beginning the day before ligation until sacrifice on the third day after ligation. The air pouch study was accomplished in C, lipopolysaccharide (LPS), and LPS + AMD groups. Air pouches on mice backs were formed by subcutaneous injection of sterilized air. AMD was administered and then LPS was injected into the air pouch. For the detection of neutrophils and monocytes/macrophages in blood and air pouch exudates, flow cytometry was performed with anti-Ly6G/anti-CD11b antibodies (Abs) and anti-CD115 Ab, respectively. In periodontal tissue, Ly6G+ cells and CD115+ cells were counted by immunohistological analysis. AB loss was estimated by the periodontal ligament area in the furcation. In the periodontitis study, the P group showed higher numbers of Ly6G+ cells and CD115+ cells in blood and periodontal tissue than the C group. The P + AMD group showed a greater number of Ly6G+ cells and CD115+ cells in blood, but not in periodontal tissue compared to the P group. There was no difference in AB loss between the P and P + AMD groups. In the air pouch study, the LPS group had higher levels of Ly6G+ CD11b+ cells and CD115+ cells in both blood and exudates than the C group. The number of these cells in the LPS + AMD group was higher in blood than in the LPS group, but not in the exudates. The CXCR4 antagonist further increased neutrophil and monocyte/macrophage populations in the blood, but did not alter the levels in the periodontal tissue and exudates in mice with periodontitis and LPS-injected air pouches. These results suggest that during inflammatory conditions such as periodontitis, CXCR4 is involved in the distribution of neutrophils and monocytes/macrophages in the blood, but not in inflamed peripheral tissues.
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Affiliation(s)
- Ae Ri Kim
- Department of Oral Biology, Yonsei University College of Dentistry, Seoul, South Korea.,Department of Applied Life Science, The Graduate School, Yonsei University, Seoul, South Korea.,BK21 PLUS Project, Yonsei University College of Dentistry, Seoul, South Korea
| | - Eun-Jung Bak
- Department of Oral Biology, Yonsei University College of Dentistry, Seoul, South Korea
| | - Yun-Jung Yoo
- Department of Oral Biology, Yonsei University College of Dentistry, Seoul, South Korea
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8
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Combes TW, Orsenigo F, Stewart A, Mendis ASJR, Dunn-Walters D, Gordon S, Martinez FO. CSF1R defines the mononuclear phagocyte system lineage in human blood in health and COVID-19. IMMUNOTHERAPY ADVANCES 2021; 1:ltab003. [PMID: 35915730 PMCID: PMC7928847 DOI: 10.1093/immadv/ltab003] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 02/09/2021] [Accepted: 02/15/2021] [Indexed: 12/31/2022] Open
Abstract
Summary
Mononuclear phagocytes defend tissues, present antigens, and mediate recovery and healing. To date, we lack a marker to unify mononuclear phagocytes in humans or that informs us about their origin. Here, we reassess mononuclear phagocyte ontogeny in human blood through the lineage receptor CSF1R, in the steady state and in COVID-19. We define CSF1R as the first sensitive and reproducible pan-phagocyte lineage marker, to identify and enumerate all conventional monocytes, and the myeloid dendritic cells. In the steady state, CSF1R is sufficient for sorting and immuno-magnetic isolation. In pathology, changes in CSF1R are more sensitive than CD14 and CD16. In COVID-19, a significant drop in membrane CSF1R is useful for stratifying patients, beyond the power of cell categories published thus far, which fail to capture COVID-19 specific events. Importantly, CSF1R defines cells which are neither conventional monocytes nor DCs, which are missed in published analysis. CSF1R decrease can be linked ex vivo to high CSF1 levels. Blood assessment of CSF1R+ cells opens a developmental window to the Mononuclear Phagocyte System in transit from bone marrow to tissues, supports isolation and phenotypic characterisation, identifies novel cell types, and singles out CSF1R inhibition as therapeutic target in COVID-19 and other diseases.
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Affiliation(s)
- Theo W Combes
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | - Federica Orsenigo
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy
| | - Alexander Stewart
- Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
| | | | | | - Siamon Gordon
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan City, Taiwan
- Sir William Dunn School of Pathology, University of Oxford, Oxford, UK
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9
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Mo S, Gu L, Xu W, Liu J, Ding D, Wang Z, Yang J, Kong L, Zhao Y. Bifunctional macromolecule activating both OX40 and interferon-α signaling displays potent therapeutic effects in mouse HBV and tumor models. Int Immunopharmacol 2020; 89:107099. [PMID: 33091819 DOI: 10.1016/j.intimp.2020.107099] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/10/2020] [Accepted: 10/10/2020] [Indexed: 11/16/2022]
Abstract
Combinatory enhancement of innate and adaptive immune responses is a promising strategy in immunotherapeutic drug development. Bifunctional macromolecules that simultaneously target two mechanisms may provide additional advantages over the combination of targeting two single pathways. Interferon alpha (IFNα) has been used clinically against viral infection such as the chronic infection of hepatitis B virus (CHB) as well as some types of cancers. OX40 is a costimulatory immune checkpoint molecule involved in the activation of T lymphocytes. To test whether simultaneously activating IFNα and OX40 signaling pathway could produce a synergistic therapeutic effect on CHB and tumors, we designed a bifunctional fusion protein composed of a mouse OX40 agonistic monoclonal antibody (OX86) and a mouse IFNα4, joined by a flexible (GGGGS)3 linker. This fusion protein, termed OX86-IFN, can activate both IFNα and OX40. We demonstrated that OX86-IFN could effectively activate T lymphocytes in the peripheral blood of mice. Furthermore, we showed that OX86-IFN had superior therapeutic effect to monotherapies in HBV hydrodynamic transfection and syngeneic tumor models. Collectively, our data suggests that simultaneously targeting interferon and OX40 signaling pathways by bifunctional molecule OX86-IFN elicits potent antiviral and antitumor activities, which could provide a new strategy in developing therapeutic agents against viral infection and tumors.
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Affiliation(s)
- Shifu Mo
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, PR China; Nanjing U-Mab Biopharma Co., Ltd, 699-8 Xuanwu Avenue, Nanjing, Jiangsu 210042, PR China
| | - Liyun Gu
- Nanjing U-Mab Biopharma Co., Ltd, 699-8 Xuanwu Avenue, Nanjing, Jiangsu 210042, PR China
| | - Wei Xu
- Nanjing U-Mab Biopharma Co., Ltd, 699-8 Xuanwu Avenue, Nanjing, Jiangsu 210042, PR China
| | - Jia Liu
- Department of Infectious Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, PR China
| | - Dong Ding
- Nanjing U-Mab Biopharma Co., Ltd, 699-8 Xuanwu Avenue, Nanjing, Jiangsu 210042, PR China
| | - Zhichao Wang
- Nanjing U-Mab Biopharma Co., Ltd, 699-8 Xuanwu Avenue, Nanjing, Jiangsu 210042, PR China
| | - Jie Yang
- Nanjing U-Mab Biopharma Co., Ltd, 699-8 Xuanwu Avenue, Nanjing, Jiangsu 210042, PR China
| | - Lingdong Kong
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 163 Xianlin Avenue, Nanjing, Jiangsu 210023, PR China.
| | - Yong Zhao
- Nanjing U-Mab Biopharma Co., Ltd, 699-8 Xuanwu Avenue, Nanjing, Jiangsu 210042, PR China.
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10
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Heterogeneous origins and functions of mouse skeletal muscle-resident macrophages. Proc Natl Acad Sci U S A 2020; 117:20729-20740. [PMID: 32796104 DOI: 10.1073/pnas.1915950117] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Tissue-resident macrophages can originate from embryonic or adult hematopoiesis. They play important roles in a wide range of biological processes including tissue remodeling during organogenesis, organ homeostasis, repair following injury, and immune response to pathogens. Although the origins and tissue-specific functions of resident macrophages have been extensively studied in many other tissues, they are not well characterized in skeletal muscle. In the present study, we have characterized the ontogeny of skeletal muscle-resident macrophages by lineage tracing and bone marrow transplant experiments. We demonstrate that skeletal muscle-resident macrophages originate from both embryonic hematopoietic progenitors located within the yolk sac and fetal liver as well as definitive hematopoietic stem cells located within the bone marrow of adult mice. Single-cell-based transcriptome analyses revealed that skeletal muscle-resident macrophages are distinctive from resident macrophages in other tissues as they express a distinct complement of transcription factors and are composed of functionally diverse subsets correlating to their origins. Functionally, skeletal muscle-resident macrophages appear to maintain tissue homeostasis and promote muscle growth and regeneration.
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11
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Stackowicz J, Jönsson F, Reber LL. Mouse Models and Tools for the in vivo Study of Neutrophils. Front Immunol 2020; 10:3130. [PMID: 32038641 PMCID: PMC6985372 DOI: 10.3389/fimmu.2019.03130] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 12/23/2019] [Indexed: 12/21/2022] Open
Abstract
Neutrophils are the most abundant leukocytes in human blood and critical actors of the immune system. Many neutrophil functions and facets of their activity in vivo were revealed by studying genetically modified mice or by tracking fluorescent neutrophils in animals using imaging approaches. Assessing the roles of neutrophils can be challenging, especially when exact molecular pathways are questioned or disease states are interrogated that alter normal neutrophil homeostasis. This review discusses the main in vivo models for the study of neutrophils, their advantages and limitations. The side-by-side comparison underlines the necessity to carefully choose the right model(s) to answer a given scientific question, and exhibit caveats that need to be taken into account when designing experimental procedures. Collectively, this review suggests that at least two models should be employed to legitimately conclude on neutrophil functions.
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Affiliation(s)
- Julien Stackowicz
- Institut Pasteur, Department of Immunology, Unit of Antibodies in Therapy and Pathology, UMR INSERM 1222, Paris, France.,Sorbonne Université, Collège Doctoral, Paris, France
| | - Friederike Jönsson
- Institut Pasteur, Department of Immunology, Unit of Antibodies in Therapy and Pathology, UMR INSERM 1222, Paris, France
| | - Laurent L Reber
- Institut Pasteur, Department of Immunology, Unit of Antibodies in Therapy and Pathology, UMR INSERM 1222, Paris, France.,Center for Pathophysiology Toulouse-Purpan (CPTP), UMR 1043, University of Toulouse, INSERM, CNRS, Toulouse, France
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12
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Nanda SK, Petrova T, Marchesi F, Gierlinski M, Razsolkov M, Lee KL, Wright SW, Rao VR, Cohen P, Arthur JSC. Distinct signals and immune cells drive liver pathology and glomerulonephritis in ABIN1[D485N] mice. Life Sci Alliance 2019; 2:2/6/e201900533. [PMID: 31694920 PMCID: PMC6836709 DOI: 10.26508/lsa.201900533] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 10/24/2019] [Accepted: 10/24/2019] [Indexed: 01/01/2023] Open
Abstract
This article shows that liver and kidney damage in a lupus-prone mouse line occurs by different mechanisms and that only drugs targeting core components of signaling pathway, such as IRAK4, are able to suppress all facets of the disease. We report that TLR7, IL-6, and the adaptive immune system are essential for autoimmunity and glomerulonephritis but not for liver pathology in mice expressing the ubiquitin-binding–defective ABIN1[D485N] mutant. The blood and organs of ABIN1[D485N] mice have exceptionally high numbers of patrolling monocytes (pMo), which develop independently of IL-6 and the adaptive immune system. They are detectable in the blood months before autoimmunity and organ pathology are seen and may have diagnostic potential. The splenic pMo, inflammatory monocytes (iMo), and neutrophils of ABIN1[D485N] mice expressed high levels of mRNAs encoding proteins released during NETosis, which together with the high numbers of monocyte-derived dendritic cells (MoDCs) may drive the liver pathology in ABIN1[D485N] mice, and contribute to the pathology of other organs. The splenic iMo of ABIN1[D485N] mice displayed high expression of mRNAs encoding proteins controlling cell division and were actively dividing; this may underlie the increased pMo and MoDC numbers, which are derived from iMo. An orally active IRAK4 inhibitor suppressed all facets of the disease phenotype and prevented the increase in pMo numbers.
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Affiliation(s)
- Sambit Kumar Nanda
- Medical Research Council Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee, UK
| | - Tsvetana Petrova
- Medical Research Council Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee, UK.,Division of Cell Signaling and Immunology, School of Life Sciences, University of Dundee, Dundee, UK
| | - Francesco Marchesi
- School of Veterinary Medicine, College of Medical Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Marek Gierlinski
- Division of Computational Biology, School of Life Sciences, University of Dundee, Dundee, Scotland, UK
| | - Momchil Razsolkov
- Division of Cell Signaling and Immunology, School of Life Sciences, University of Dundee, Dundee, UK
| | - Katherine L Lee
- Worldwide Medicinal Chemistry, Pfizer Inc, New York, NY, USA
| | | | - Vikram R Rao
- Inflammation and Immunology Research Unit, Pfizer Research, Cambridge, MA, USA
| | - Philip Cohen
- Medical Research Council Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee, UK
| | - J Simon C Arthur
- Division of Cell Signaling and Immunology, School of Life Sciences, University of Dundee, Dundee, UK
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13
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Lafuse WP, Rajaram MVS, Wu Q, Moliva JI, Torrelles JB, Turner J, Schlesinger LS. Identification of an Increased Alveolar Macrophage Subpopulation in Old Mice That Displays Unique Inflammatory Characteristics and Is Permissive to Mycobacterium tuberculosis Infection. THE JOURNAL OF IMMUNOLOGY 2019; 203:2252-2264. [PMID: 31511357 DOI: 10.4049/jimmunol.1900495] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 08/08/2019] [Indexed: 12/11/2022]
Abstract
The elderly population is more susceptible to pulmonary infections, including tuberculosis. In this article, we characterize the impact of aging on the phenotype of mouse alveolar macrophages (AMs) and their response to Mycobacterium tuberculosis. Uninfected AMs were isolated from bronchoalveolar lavage of young (3 mo) and old (18 mo) C57BL/6 mice. AMs from old mice expressed higher mRNA levels of CCL2, IFN-β, IL-10, IL-12p40, TNF-α, and MIF than young mice, and old mice contained higher levels of CCL2, IL-1β, IFN-β, and MIF in their alveolar lining fluid. We identified two distinct AM subpopulations, a major CD11c+ CD11b- population and a minor CD11c+ CD11b+ population; the latter was significantly increased in old mice (4-fold). Expression of CD206, TLR2, CD16/CD32, MHC class II, and CD86 was higher in CD11c+ CD11b+ AMs, and these cells expressed monocytic markers Ly6C, CX3CR1, and CD115, suggesting monocytic origin. Sorted CD11c+ CD11b+ AMs from old mice expressed higher mRNA levels of CCL2, IL-1β, and IL-6, whereas CD11c+ CD11b- AMs expressed higher mRNA levels of immune-regulatory cytokines IFN-β and IL-10. CD11c+ CD11b+ AMs phagocytosed significantly more M. tuberculosis, which expressed higher RNA levels of genes required for M. tuberculosis survival. Our studies identify two distinct AM populations in old mice: a resident population and an increased CD11c+ CD11b+ AM subpopulation expressing monocytic markers, a unique inflammatory signature, and enhanced M. tuberculosis phagocytosis and survival when compared with resident CD11c+ CD11b- AMs, which are more immune regulatory in nature.
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Affiliation(s)
- William P Lafuse
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210; and
| | - Murugesan V S Rajaram
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210; and
| | - Qian Wu
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210; and
| | - Juan I Moliva
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210; and.,Texas Biomedical Research Institute, San Antonio, TX 78227
| | - Jordi B Torrelles
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210; and.,Texas Biomedical Research Institute, San Antonio, TX 78227
| | - Joanne Turner
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210; and.,Texas Biomedical Research Institute, San Antonio, TX 78227
| | - Larry S Schlesinger
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH 43210; and.,Texas Biomedical Research Institute, San Antonio, TX 78227
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14
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Decreased M1 macrophage polarization in dabigatran-treated Ldlr-deficient mice: Implications for atherosclerosis and adipose tissue inflammation. Atherosclerosis 2019; 287:81-88. [DOI: 10.1016/j.atherosclerosis.2019.06.897] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 05/14/2019] [Accepted: 06/07/2019] [Indexed: 12/22/2022]
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15
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Leist SR, Jensen KL, Baric RS, Sheahan TP. Increasing the translation of mouse models of MERS coronavirus pathogenesis through kinetic hematological analysis. PLoS One 2019; 14:e0220126. [PMID: 31339932 PMCID: PMC6655769 DOI: 10.1371/journal.pone.0220126] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 07/09/2019] [Indexed: 11/18/2022] Open
Abstract
Newly emerging viral pathogens pose a constant and unpredictable threat to human and animal health. Coronaviruses (CoVs) have a penchant for sudden emergence, as evidenced by severe acute respiratory syndrome coronavirus (SARS-CoV), Middle East respiratory syndrome CoV (MERS-CoV) and most recently, swine acute diarrhea syndrome coronavirus (SADS-CoV). Small animal models of emerging viral pathogenesis are crucial to better understand the virus and host factors driving disease progression. However, rodent models are often criticized for their limited translatability to humans. The complete blood count is the most ordered clinical test in the United States serving as the cornerstone of clinical medicine and differential diagnosis. We recently generated a mouse model for MERS-CoV pathogenesis through the humanization of the orthologous entry receptor dipeptidyl peptidase 4 (DPP4). To increase the translatability of this model, we validated and established the use of an automated veterinary hematology analyzer (VetScan HM5) at biosafety level 3 for analysis of peripheral blood. MERS-CoV lung titer peaked 2 days post infection concurrent with lymphopenia and neutrophilia in peripheral blood, two phenomena also observed in MERS-CoV infection of humans. The fluctuations in leukocyte populations measured by Vetscan HM5 were corroborated by standard flow cytometry, thus confirming the utility of this approach. Comparing a sublethal and lethal dose of MERS-CoV in mice, analysis of daily blood draws demonstrates a dose dependent modulation of leukocytes. Major leukocyte populations were modulated before weight loss was observed. Importantly, neutrophil counts on 1dpi were predictive of disease severity with a lethal dose of MERS-CoV highlighting the predictive value of hematology in this model. Taken together, the inclusion of hematological measures in mouse models of emerging viral pathogenesis increases their translatability and should elevate the preclinical evaluation of MERS-CoV therapeutics and vaccines to better mirror the complexity of the human condition.
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Affiliation(s)
- Sarah R. Leist
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Kara L. Jensen
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Ralph S. Baric
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Timothy P. Sheahan
- Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
- * E-mail:
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16
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Bourgoin P, Hayman J, Rimmelé T, Venet F, Malergue F, Monneret G. A novel one-step extracellular staining for flow cytometry: Proof-of-concept on sepsis-related biomarkers. J Immunol Methods 2019; 470:59-63. [DOI: 10.1016/j.jim.2019.05.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/25/2019] [Accepted: 05/08/2019] [Indexed: 12/30/2022]
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17
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Petriz J, Bradford JA, Ward MD. No lyse no wash flow cytometry for maximizing minimal sample preparation. Methods 2018; 134-135:149-163. [DOI: 10.1016/j.ymeth.2017.12.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 12/11/2017] [Accepted: 12/14/2017] [Indexed: 11/17/2022] Open
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18
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Wohner N, Muczynski V, Mohamadi A, Legendre P, Proulle V, Aymé G, Christophe OD, Lenting PJ, Denis CV, Casari C. Macrophage scavenger receptor SR-AI contributes to the clearance of von Willebrand factor. Haematologica 2018; 103:728-737. [PMID: 29326120 PMCID: PMC5865439 DOI: 10.3324/haematol.2017.175216] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Accepted: 12/27/2017] [Indexed: 12/25/2022] Open
Abstract
Previously, we found that LDL-receptor related protein-1 on macrophages mediated shear stress-dependent clearance of von Willebrand factor. In control experiments, however, we observed that von Willebrand factor also binds to macrophages independently of this receptor under static conditions, suggesting the existence of additional clearance-receptors. In search for such receptors, we focused on the macrophage-specific scavenger-receptor SR-AI. von Willebrand factor displays efficient binding to SR-AI (half-maximum binding 14±5 nM). Binding is calcium-dependent and is inhibited by 72±4% in the combined presence of antibodies against the A1- and D4-domains. Association with SR-AI was confirmed in cell-binding experiments. In addition, binding to bone marrow-derived murine SR-AI-deficient macrophages was strongly reduced compared to binding to wild-type murine macrophages. Following expression via hydrodynamic gene transfer, we determined ratios for von Willebrand factor-propeptide over von Willebrand factor-antigen, a marker of von Willebrand factor clearance. Propeptide/antigen ratios were significantly reduced in SR-AI-deficient mice compared to wild-type mice (0.6±0.2 versus 1.3±0.3; P<0.0001), compatible with a slower clearance of von Willebrand factor in SR-AI-deficient mice. Interestingly, mutants associated with increased clearance (von Willebrand factor/p.R1205H and von Willebrand factor/p.S2179F) had significantly increased binding to purified SR-AI and SR-AI expressed on macrophages. Accordingly, propeptide/antigen ratios for these mutants were reduced in SR-AI-deficient mice. In conclusion, we have identified SR-AI as a novel macrophage-specific receptor for von Willebrand factor. Enhanced binding of von Willebrand factor mutants to SR-AI may contribute to the increased clearance of these mutants.
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Affiliation(s)
- Nikolett Wohner
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Univ. Paris-Sud, Université Paris-Saclay, 94276 Le Kremlin-Bicêtre, France
| | - Vincent Muczynski
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Univ. Paris-Sud, Université Paris-Saclay, 94276 Le Kremlin-Bicêtre, France
| | - Amel Mohamadi
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Univ. Paris-Sud, Université Paris-Saclay, 94276 Le Kremlin-Bicêtre, France
| | - Paulette Legendre
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Univ. Paris-Sud, Université Paris-Saclay, 94276 Le Kremlin-Bicêtre, France
| | - Valérie Proulle
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Univ. Paris-Sud, Université Paris-Saclay, 94276 Le Kremlin-Bicêtre, France.,Service d'Hématologie Biologique, Centre Hospitalier Universitaire Bicêtre, Assistance Publique-Hôpitaux de Paris, 94276 Le Kremlin-Bicêtre, France
| | - Gabriel Aymé
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Univ. Paris-Sud, Université Paris-Saclay, 94276 Le Kremlin-Bicêtre, France
| | - Olivier D Christophe
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Univ. Paris-Sud, Université Paris-Saclay, 94276 Le Kremlin-Bicêtre, France
| | - Peter J Lenting
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Univ. Paris-Sud, Université Paris-Saclay, 94276 Le Kremlin-Bicêtre, France
| | - Cécile V Denis
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Univ. Paris-Sud, Université Paris-Saclay, 94276 Le Kremlin-Bicêtre, France
| | - Caterina Casari
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Univ. Paris-Sud, Université Paris-Saclay, 94276 Le Kremlin-Bicêtre, France
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19
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M. Živković J, Đ. Vukelić - Nikolić M, G. Najdanović J, Stojanović S, S. Vitorović J, B. Radenković M, J. Najman S. BON E TISSUE ENGINEER ING BA SED ON BONE MARROW I N BLOOD CLOT LOADED ON MINER AL MATRIX CARRIER: E XPERIMENTAL STUDY IN SUBCUTANEOUS MICE MODEL. ACTA MEDICA MEDIANAE 2017. [DOI: 10.5633/amm.2017.0301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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20
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Gasco S, Zaragoza P, García-Redondo A, Calvo AC, Osta R. Inflammatory and non-inflammatory monocytes as novel prognostic biomarkers of survival in SOD1G93A mouse model of Amyotrophic Lateral Sclerosis. PLoS One 2017; 12:e0184626. [PMID: 28886177 PMCID: PMC5591000 DOI: 10.1371/journal.pone.0184626] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 08/28/2017] [Indexed: 12/13/2022] Open
Abstract
Amyotrophic Lateral Sclerosis (ALS) has lately become a suitable scenario to study the interplay between the hematopoietic system and disease progression. Recent studies in C9orf72 null mice have demonstrated that C9orf72 is necessary for the normal function of myeloid cells. In this study, we aimed to analyze in depth the connection between the hematopoietic system and secondary lymphoid (spleen) and non-lymphoid (liver and skeletal muscle) organs and tissues along the disease progression in the transgenic SOD1G93A mice. Our findings suggested that the inflammatory response due to the neurodegeneration in this animal model affected all three organs and tissues, especially the liver and the skeletal muscle. However, the liver was able to compensate this inflammatory response by means of the action of non-inflammatory monocytes, while in the skeletal muscle inflammatory monocytes prompted a further inflammation process until the terminal state of the animals. Interestingly, in blood, a positive correlation was found between non-inflammatory monocytes and survival of the transgenic SOD1G93A mice, while the contrary (a negative correlation) was found in the case of inflammatory monocytes, supporting their potential role as biomarkers of disease progression and survival in this animal model. These findings could prompt future translational studies in ALS patients, promoting the identification of new reliable biomarkers of disease progression.
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Affiliation(s)
- Samanta Gasco
- LAGENBIO, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón (I2A), CITA, Health Research Institute of Aragon (IIS). University of Zaragoza, Zaragoza, Spain
- * E-mail:
| | - Pilar Zaragoza
- LAGENBIO, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón (I2A), CITA, Health Research Institute of Aragon (IIS). University of Zaragoza, Zaragoza, Spain
| | - Alberto García-Redondo
- Biochemistry Department, CIBERER U-723. Health Research Institute, October 12th Hospital, Madrid, Spain
| | - Ana C. Calvo
- LAGENBIO, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón (I2A), CITA, Health Research Institute of Aragon (IIS). University of Zaragoza, Zaragoza, Spain
| | - Rosario Osta
- LAGENBIO, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón (I2A), CITA, Health Research Institute of Aragon (IIS). University of Zaragoza, Zaragoza, Spain
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21
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Gasco S, Rando A, Zaragoza P, García-Redondo A, Calvo AC, Osta R. Comparative study of hematopoietic stem and progenitor cells between sexes in mice under physiological conditions along time. Cell Biol Int 2017; 41:1399-1405. [PMID: 28851070 DOI: 10.1002/cbin.10865] [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: 06/06/2017] [Accepted: 08/26/2017] [Indexed: 11/11/2022]
Abstract
Hematopoietic stem and progenitor cells (HSPCs) are attractive targets in regenerative medicine, although the differences in their homeostatic maintenance between sexes along time are still under debate. We accurately monitored hematopoietic stem cells (HSCs), common lymphoid progenitors (CLPs), and common myeloid progenitors (CMPs) frequencies by flow cytometry, by performing serial peripheral blood extractions from male and female B6SJL wild-type mice and found no significant differences. Only modest differences were found in the gene expression profile of Slamf1 and Gata2. Our findings suggest that both sexes could be used indistinctly to perform descriptive studies in the murine hematopoietic system, especially for flow cytometry studies in peripheral blood. This would allow diminishing the number of animals needed for the experimental procedures. In addition, the use of serial extractions in the same animals drastically decreases the number of animals needed.
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Affiliation(s)
- Samanta Gasco
- LAGENBIO, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón (IA2), IIS Aragón, University of Zaragoza, Miguel Servet, 177, 50013 Zaragoza, Spain
| | - Amaya Rando
- LAGENBIO, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón (IA2), IIS Aragón, University of Zaragoza, Miguel Servet, 177, 50013 Zaragoza, Spain
| | - Pilar Zaragoza
- LAGENBIO, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón (IA2), IIS Aragón, University of Zaragoza, Miguel Servet, 177, 50013 Zaragoza, Spain
| | - Alberto García-Redondo
- Department of Biochemistry, CIBERER U-723, Health Research Institute, October 12th Hospital, Avda. Córdoba s/n, 28041 Madrid, Spain
| | - Ana Cristina Calvo
- LAGENBIO, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón (IA2), IIS Aragón, University of Zaragoza, Miguel Servet, 177, 50013 Zaragoza, Spain
| | - Rosario Osta
- LAGENBIO, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón (IA2), IIS Aragón, University of Zaragoza, Miguel Servet, 177, 50013 Zaragoza, Spain
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22
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C/EBPβ is required for survival of Ly6C - monocytes. Blood 2017; 130:1809-1818. [PMID: 28807982 DOI: 10.1182/blood-2017-03-772962] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 08/07/2017] [Indexed: 02/06/2023] Open
Abstract
The transcription factor CCAAT/enhancer-binding protein β (C/EBPβ) is highly expressed in monocytes/macrophages. However, its roles in monopoiesis are largely unknown. Here, we investigated the roles of C/EBPβ in monopoiesis. Further subdivision of monocytes revealed that Cebpb messenger RNA was highly upregulated in Ly6C- monocytes in bone marrow. Accordingly, the number of Ly6C- monocytes was significantly reduced in Cebpb-/- mice. Bone marrow chimera experiments and Mx1-Cre-mediated deletion of Cebpb revealed a cell-intrinsic and monocyte-specific requirement for C/EBPβ in monopoiesis. In Cebpb-/- mice, turnover of Ly6C- monocytes was highly accelerated and apoptosis of Ly6C- monocytes was increased. Expression of Csf1r, which encodes a receptor for macrophage colony-stimulating factor, was significantly reduced in Ly6C- monocytes of Cebpb-/- mice. C/EBPβ bound to positive regulatory elements of Csf1r and promoted its transcription. Collectively, these results indicate that C/EBPβ is a critical factor for Ly6C- monocyte survival, at least in part through upregulation of Csf1r.
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Llewellyn RA, Thomas KS, Gutknecht MF, Bouton AH. The nonreceptor protein tyrosine kinase Pyk2 promotes the turnover of monocytes at steady state. J Leukoc Biol 2017; 102:1069-1080. [PMID: 28754799 DOI: 10.1189/jlb.1a0217-063r] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 06/20/2017] [Accepted: 07/10/2017] [Indexed: 12/30/2022] Open
Abstract
Monocytes are short-lived myeloid cells that perform functions essential for tissue homeostasis and disease resolution. However, the cellular mechanisms controlling the maintenance and turnover of monocyte populations are largely undefined. Proline-rich tyrosine kinase 2 (Pyk2) is a nonreceptor tyrosine kinase that regulates numerous immune cell functions, but its role in monocytes is currently unknown. In this study, we sought to characterize the expression and function of Pyk2 in lineage-committed monocyte populations. Here, we report that Pyk2 protein expression is increased in the Ly6C- monocyte population. Using a Pyk2 knockout mouse model (Pyk2-/-), we show that Pyk2 regulates the relative proportion of monocyte subsets normally represented in the bone marrow (BM) at steady state. In support of this conclusion, a similar phenotype was observed in the peripheral blood and spleen. Data from reciprocal BM chimera experiments indicate that the alterations in monocyte populations exhibited by Pyk2-/- mice are due to factors intrinsic to the monocytes. Lineage-tracing of monocyte populations suggests that Pyk2 promotes apoptosis in BM monocytes, thereby acting as an important homeostatic regulator of turnover in these short-lived, innate immune cells.
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Affiliation(s)
- Ryan A Llewellyn
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Keena S Thomas
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Michael F Gutknecht
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
| | - Amy H Bouton
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, Virginia, USA
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Aranda-Uribe IS, Ortega E, Martínez-Cordero E. Immunization of BALB/c mice with pigeon IgY induces the production of anti-IgG autoantibodies. Autoimmunity 2017; 50:336-345. [PMID: 28699799 DOI: 10.1080/08916934.2017.1344974] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The breakdown of immunological tolerance due to the activation of autoreactive B and T cells triggers physiopathological processes. An example of such conditions is the production of IgG autoantibodies specific for the Fc portion of IgG (anti-Fcγ IgG). Previous reports have shown that patients with pigeon-related hypersensitivity pneumonitis exhibit an increase in the serum levels of anti-Fcγ IgG. There is no in vivo model for the study of this condition and the immunological mechanisms of tolerance breakdown associated with sensitization by pigeon antigens are still unknown. In this work, we show that the repeated immunization of BALB/c mice with pigeon IgY during 16-weeks induces the production of anti-Fcγ IgG and keeps their high levels for seven weeks. The late appearance of anti-Fcγ IgG autoantibodies in the plasma is similar to what has been reported in other experimental autoimmune models. With the occurrence of anti-Fcγ IgG, there is a reduction in the proportion of Foxp3 + cells (regulatory T cells, Tregs) within the population of splenic CD4 + CD25 + T cells. Thus, our data showed that the immunization of BALB/c mice with IgY promotes the production of anti-Fcγ IgG along with a decrease in Tregs in the spleen. We propose that immunization of mice with pigeon antigens, like IgY can provide a model to study the immunological mechanisms involved in the development of pigeon-related hypersensitivity pneumonitis.
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Affiliation(s)
- Ivan Sammir Aranda-Uribe
- a Facultad de Medicina , Universidad Nacional Autónoma de México, Posgrado Ciencias Biológicas , México City , México.,b Laboratorio de Autoinmunidad , Unidad de Investigación INER , México City , México
| | - Enrique Ortega
- c Instituto de Investigaciones Biomédicas , Universidad Nacional Autónoma de México , México City , México
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Fazavana JG, Muczynski V, Proulle V, Wohner N, Christophe OD, Lenting PJ, Denis CV. LDL receptor-related protein 1 contributes to the clearance of the activated factor VII-antithrombin complex. J Thromb Haemost 2016; 14:2458-2470. [PMID: 27614059 DOI: 10.1111/jth.13502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 08/30/2016] [Indexed: 11/30/2022]
Abstract
Essentials Factor VIIa is cleared principally as a complex with antithrombin. Enzyme/serpin complexes are preferred ligands for the scavenger-receptor LRP1. Factor VIIa/antithrombin but not factor VIIa alone is a ligand for LRP1. Macrophage-expressed LRP1 contributes to the clearance of factor VIIa/antithrombin. SUMMARY Background Recent findings point to activated factor VII (FVIIa) being cleared predominantly (± 65% of the injected protein) as part of a complex with the serpin antithrombin. FVIIa-antithrombin complexes are targeted to hepatocytes and liver macrophages. Both cells lines abundantly express LDL receptor-related protein 1 (LRP1), a scavenger receptor mediating the clearance of protease-serpin complexes. Objectives To investigate whether FVIIa-antithrombin is a ligand for LRP1. Methods Binding of FVIIa and pre-formed FVIIa-antithrombin to purified LRP1 Fc-tagged cluster IV (rLRP1-cIV/Fc) and to human and murine macrophages was analyzed. FVIIa clearance was determined in macrophage LRP1 (macLRP1)-deficient mice. Results Solid-phase binding assays showed that FVIIa-antithrombin bound in a specific, dose-dependent and saturable manner to rLRP1-cIV/Fc. Competition experiments with human THP1 macrophages indicated that binding of FVIIa but not of FVIIa-antithrombin was reduced in the presence of annexin-V or anti-tissue factor antibodies, whereas binding of FVIIa-antithrombin but not FVIIa was inhibited by the LRP1-antagonist GST-RAP. Additional experiments revealed binding of both FVIIa and FVIIa-antithrombin to murine control macrophages. In contrast, no binding of FVIIa-antithrombin to macrophages derived from macLRP1-deficient mice could be detected. Clearance of FVIIa-antithrombin but not of active site-blocked FVIIa was delayed 1.5-fold (mean residence time of 3.3 ± 0.1 h versus 2.4 ± 0.2 h) in macLRP1-deficient mice. The circulatory presence of FVIIa was prolonged to a similar extent in macLRP1-deficient mice and in control mice. Conclusions Our data show that FVIIa-antithrombin but not FVIIa is a ligand for LRP1, and that LRP1 contributes to the clearance of FVIIa-antithrombin in vivo.
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Affiliation(s)
- J G Fazavana
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - V Muczynski
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - V Proulle
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
- Department of Biological Hematology, CHU Bicetre, Hôpitaux Universitaires Paris Sud, AP-HP, Paris, France
| | - N Wohner
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - O D Christophe
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - P J Lenting
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
| | - C V Denis
- Institut National de la Santé et de la Recherche Médicale, UMR_S 1176, Universitaires Paris-Sud, Université Paris-Saclay, Le Kremlin-Bicêtre, France
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Gasco S, Rando A, Zaragoza P, García-Redondo A, Calvo AC, Osta R. Hematopoietic stem and progenitor cells as novel prognostic biomarkers of longevity in a murine model for amyotrophic lateral sclerosis. Am J Physiol Cell Physiol 2016; 311:C910-C919. [PMID: 27681176 DOI: 10.1152/ajpcell.00081.2016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 09/21/2016] [Indexed: 11/22/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease with a difficult diagnosis and prognosis. In this regard, new and more reliable biomarkers for the disease are needed. We propose peripheral blood, and, more specifically, the hematopoietic stem and progenitor cells (HSPCs) as potential prognostic biomarkers in the SOD1G93A murine model of ALS. We accurately and serially studied three HSPCs-hematopoietic stem cells (HSCs), common lymphoid progenitors (CLPs), and common myeloid progenitors (CMPs)-in both control and SOD1G93A mice along the disease's progression by RT-PCR and flow cytometry analysis. We found interesting differences for every HSPC type in the transgenic mice compared with the control mice at every time point selected, as well as differences along the disease course. The results showed a maintained compensatory increase of HSCs along disease progression. However, the downregulated levels of CLPs and CMPs suggested an exit of these cell populations to the peripheral tissues, probably due to their supporting role to the damaged tissues. In addition, a positive correlation of the percentage of CLPs and CMPs with the longevity was found, as well as a positive correlation of HSCs and CMPs with motor function and weight, thus reinforcing the idea that HSPCs play a relevant role in the longevity of the SOD1G93A mice. On the basis of these results, both CLPs and CMPs could be considered prognostic biomarkers of longevity in this animal model, opening the door to future studies in human patients for their potential clinical use.
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Affiliation(s)
- Samanta Gasco
- Laboratorio de Genética Bioquímica, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón, Health Research Institute of Aragon, University of Zaragoza, Zaragoza, Spain; and
| | - Amaya Rando
- Laboratorio de Genética Bioquímica, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón, Health Research Institute of Aragon, University of Zaragoza, Zaragoza, Spain; and
| | - Pilar Zaragoza
- Laboratorio de Genética Bioquímica, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón, Health Research Institute of Aragon, University of Zaragoza, Zaragoza, Spain; and
| | - Alberto García-Redondo
- Biochemistry Department, Centre for Biomedical Network Research on Rare Diseases, Health Research Institute, October 12th Hospital, Madrid, Spain
| | - Ana Cristina Calvo
- Laboratorio de Genética Bioquímica, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón, Health Research Institute of Aragon, University of Zaragoza, Zaragoza, Spain; and
| | - Rosario Osta
- Laboratorio de Genética Bioquímica, Veterinary Faculty of Zaragoza, Instituto Agroalimentario de Aragón, Health Research Institute of Aragon, University of Zaragoza, Zaragoza, Spain; and
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Liyanage SE, Gardner PJ, Ribeiro J, Cristante E, Sampson RD, Luhmann UFO, Ali RR, Bainbridge JW. Flow cytometric analysis of inflammatory and resident myeloid populations in mouse ocular inflammatory models. Exp Eye Res 2016; 151:160-70. [PMID: 27544307 PMCID: PMC5053376 DOI: 10.1016/j.exer.2016.08.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 08/07/2016] [Accepted: 08/16/2016] [Indexed: 12/21/2022]
Abstract
Myeloid cells make a pivotal contribution to tissue homeostasis during inflammation. Both tissue-specific resident populations and infiltrating myeloid cells can cause tissue injury through aberrant activation and/or dysregulated activity. Reliable identification and quantification of myeloid cells within diseased tissues is important to understand pathological inflammatory processes. Flow cytometry is a valuable technique for leukocyte analysis, but a standardized flow cytometric method for myeloid cell populations in the eye is lacking. Here, we validate a reproducible flow cytometry gating approach to characterize myeloid cells in several commonly used models of ocular inflammation. We profile and quantify myeloid subsets across these models, and highlight the value of this strategy in identifying phenotypic differences using Ccr2-deficient mice. This method will aid standardization in the field and facilitate future investigations into the roles of myeloid cells during ocular inflammation.
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Affiliation(s)
- Sidath E Liyanage
- UCL Institute of Ophthalmology, 11-43 Bath Street, London, EC1V 9EL, UK
| | - Peter J Gardner
- UCL Institute of Ophthalmology, 11-43 Bath Street, London, EC1V 9EL, UK
| | - Joana Ribeiro
- UCL Institute of Ophthalmology, 11-43 Bath Street, London, EC1V 9EL, UK
| | - Enrico Cristante
- UCL Institute of Ophthalmology, 11-43 Bath Street, London, EC1V 9EL, UK
| | - Robert D Sampson
- UCL Institute of Ophthalmology, 11-43 Bath Street, London, EC1V 9EL, UK
| | | | - Robin R Ali
- UCL Institute of Ophthalmology, 11-43 Bath Street, London, EC1V 9EL, UK; NIHR Biomedical Research Centre for Ophthalmology, Moorfields Eye Hospital and UCL Institute of Ophthalmology, City Road, London, EC1V 2PD, UK
| | - James W Bainbridge
- UCL Institute of Ophthalmology, 11-43 Bath Street, London, EC1V 9EL, UK; NIHR Biomedical Research Centre for Ophthalmology, Moorfields Eye Hospital and UCL Institute of Ophthalmology, City Road, London, EC1V 2PD, UK
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Xu L, Li B, Huang M, Xie K, Li D, Li Y, Gu H, Fang J. Critical Role of Kupffer Cell CD89 Expression in Experimental IgA Nephropathy. PLoS One 2016; 11:e0159426. [PMID: 27437939 PMCID: PMC4954728 DOI: 10.1371/journal.pone.0159426] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 07/01/2016] [Indexed: 02/05/2023] Open
Abstract
Although IgA nephropathy (IgAN) is the most common primary glomerulonephritis worldwide, its etiology remains only partly understood. It is clear that the pathogenesis of IgAN involves the formation of macromolecular IgA1 complexes and increased levels of serum IgA1 and IgA1-immune complexes(IC), due to defective IgA1 clearance. Previous studies suggest that the blood and tissue myeloid cell-expressed IgA Fc receptor (FcαR/CD89) mediates IgA-IC clearance and its dysfunction, via decreased activity or excessive levels of soluble FcαR/sCD89 induces IgAN. Such a mechanism requires robust stimulation of IgAN levels via forced expression of CD89. In the absence of unequivocal evidence supporting such a mechanism to date, we attempted to test the extent of CD89-evoked IgAN by generating a transgenic mouse strain expressing human CD89 under the control of murine CD14 promotor. No deposition of IgA-CD89 complexes or glomerulonephritis was detected, however. Further studies showed that elimination of murine IgA was mediated by Kupffer cells. In patients, however, CD89/IgA complexes were detected, and injection of patient IgA induced IgAN-like features in CD89 Tg mice. In transgenic mice, IgAN pathogenesis involves impaired clearance of abnormal IgA via CD89, primarily by the Kupffer cells. Conditional IgAN progression in CD89 transgenic mice thus reveals important aspects of IgAN pathogenesis.
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Affiliation(s)
- Lijun Xu
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Bingyu Li
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Mengwen Huang
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Kun Xie
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Dong Li
- Shanghai Tongji Hospital, Tongji University, Shanghai, China
| | - You Li
- School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Hua Gu
- School of Life Sciences and Technology, Tongji University, Shanghai, China
- * E-mail: (JF); (HG)
| | - Jianmin Fang
- School of Life Sciences and Technology, Tongji University, Shanghai, China
- Shanghai Tongji Hospital, Tongji University, Shanghai, China
- Tongji University Suzhou Institute, Suzhou, Jiangsu, China
- Collaborative Innovation Center for Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- * E-mail: (JF); (HG)
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29
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Dietary Omega-3 Fatty Acids Increase Survival and Decrease Bacterial Load in Mice Subjected to Staphylococcus aureus-Induced Sepsis. Infect Immun 2016; 84:1205-1213. [PMID: 26857576 DOI: 10.1128/iai.01391-15] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Accepted: 02/02/2016] [Indexed: 11/20/2022] Open
Abstract
Sepsis caused by Staphylococcus aureus is increasing in incidence. With the alarming use of antibiotics,S. aureus is prone to become methicillin resistant. Antibiotics are the only widely used pharmacological treatment for sepsis. Interestingly, mice fed high-fat diet (HFD) rich in polyunsaturated fatty acids have better survival of S. aureus-induced sepsis than mice fed HFD rich in saturated fatty acids (HFD-S). To investigate what component of polyunsaturated fatty acids, i.e., omega-3 or omega-6 fatty acids, exerts beneficial effects on the survival of S. aureus-induced sepsis, mice were fed HFD rich in omega-3 or omega-6 fatty acids for 8 weeks prior to inoculation with S. aureus Further, mice fed HFD-S were treated with omega-3 fatty acid metabolites known as resolvins. Mice fed HFD rich in omega-3 fatty acids had increased survival and decreased bacterial loads compared to those for mice fed HFD-S after S. aureus-induced sepsis. Furthermore, the bacterial load was decreased in resolvin-treated mice fed HFD-S after S. aureus-induced sepsis compared with that in mice treated with vehicle. Dietary omega-3 fatty acids increase the survival of S. aureus-induced sepsis by reversing the deleterious effect of HFD-S on mouse survival.
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30
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Zhu Z, Ding J, Ma Z, Iwashina T, Tredget EE. The natural behavior of mononuclear phagocytes in HTS formation. Wound Repair Regen 2016; 24:14-25. [PMID: 26519112 DOI: 10.1111/wrr.12378] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 10/17/2015] [Indexed: 02/05/2023]
Abstract
Hypertrophic scars (HTS) are caused by trauma or burn injuries to the deep dermis and are considered fibrosis in the skin. Monocytes, M1 and M2 macrophages are mononuclear phagocytes. Studies suggest that M2 macrophages are profibrotic and might contribute to HTS formation. Our lab has established a human HTS-like nude mouse model, in which the grafted human skin develops red, raised, and firm scarring, resembling HTS seen in humans. In this study, we observed the natural behavior of mononuclear phagocyte system in this nude mouse model of dermal fibrosis at multiple time points. Thirty athymic nude mice received human skin grafts and an equal number of mice received mouse skin grafts as controls. The grafted skin and blood were harvested at 1, 2, 3, 4, and 8 weeks. Wound area, thickness, collagen morphology and level, the cell number of myofibroblasts, M1- and M2-like macrophages in the grafted skin, as well as monocyte fraction in the blood were investigated at each time points. Xenografted mice developed contracted and thickened scars grossly. The xenografted skin resembled human HTS tissue based on enhanced thickness, fibrotic orientation of collagen bundles, increased collagen level, and infiltration of myofibroblasts. In the blood, monocytes dramatically decreased at 1 week postgrafting and gradually returned to normal in the following 8 weeks. In the xenografted skin, M1-like macrophages were found predominantly at 1-2 weeks postgrafting; whereas, M2-like macrophages were abundant at later time points, 3-4 weeks postgrafting coincident with the development of fibrosis in the human skin tissues. This understanding of the natural behavior of mononuclear phagocytes in vivo in our mouse model provides evidence for the role of M2-like macrophages in fibrosis of human skin and suggests that macrophage depletion in the subacute phases of wound healing might reduce or prevent HTS formation.
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Affiliation(s)
- Zhensen Zhu
- Division of Plastic and Reconstructive Surgery, Wound Healing Research Group, University of Alberta, Edmonton, Alberta, Canada
- Department of Burn and Reconstructive Surgery, 2nd Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong, China
| | - Jie Ding
- Division of Plastic and Reconstructive Surgery, Wound Healing Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Zengshuan Ma
- Division of Plastic and Reconstructive Surgery, Wound Healing Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Takashi Iwashina
- Division of Plastic and Reconstructive Surgery, Wound Healing Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Edward E Tredget
- Division of Plastic and Reconstructive Surgery, Wound Healing Research Group, University of Alberta, Edmonton, Alberta, Canada
- Division of Plastic Surgery, Department of Surgery, University of Alberta, Edmonton, Alberta, Canada
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Macrophage receptor SR-AI is crucial to maintain normal plasma levels of coagulation factor X. Blood 2015; 127:778-86. [PMID: 26608330 DOI: 10.1182/blood-2015-05-647032] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 11/17/2015] [Indexed: 12/23/2022] Open
Abstract
Beside its classical role in the coagulation cascade, coagulation factor X (FX) is involved in several major biological processes including inflammation and enhancement of virus-induced immune responses. We recently reported that the long circulatory half-life of FX is linked to its interaction with liver-resident macrophages. Importantly, we now observed that macrophages, but not undifferentiated monocytes, support this interaction. Using cell biology approaches with primary and THP1-derived macrophages as well as transfected cells, we further identified the scavenger receptor type A member I (SR-AI) to be a macrophage-specific receptor for FX. This result was confirmed using SR-AI-deficient mice, which exhibit reduced circulating levels of FX in vivo and loss of FX-macrophage interactions in vitro. Binding studies using purified proteins revealed that FX binds specifically (half-maximal binding, 3 μg/mL) to the extracellular domain of SR-AI. Altogether, we demonstrate that macrophages regulate FX plasma levels in an SR-AI-dependent manner.
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Relationship among Short and Long Term of Hypoinsulinemia-Hyperglycemia, Dermatophytosis, and Immunobiology of Mononuclear Phagocytes. Mediators Inflamm 2015; 2015:342345. [PMID: 26538824 PMCID: PMC4619976 DOI: 10.1155/2015/342345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 06/27/2015] [Accepted: 07/26/2015] [Indexed: 12/22/2022] Open
Abstract
Dermatophytes are fungi responsible for causing superficial infections. In patients with diabetes mellitus (DM), dermatophytosis is usually more severe and recurrent. In the present study, we aimed to investigate the influence of short and long term hypoinsulinemia-hyperglycemia (HH) during experimental infection by Trichophyton mentagrophytes as well as alterations in the mononuclear phagocytes. Our results showed two distinct profiles of fungal outcome and immune response. Short term HH induced a discrete impaired proinflammatory response by peritoneal adherent cells (PAC) and a delayed fungal clearance. Moreover, long term HH mice showed low and persistent fungal load and a marked reduction in the production of TNF-α by PAC. Furthermore, while the inoculation of TM in non-HH mice triggered high influx of Gr1+ monocytes into the peripheral blood, long term HH mice showed low percentage of these cells. Thus, our results demonstrate that the time of exposure of HH interferes with the TM infection outcome as well as the immunobiology of mononuclear phagocytes, including fresh monocyte recruitment from bone marrow and PAC activity.
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Dietary polyunsaturated fatty acids increase survival and decrease bacterial load during septic Staphylococcus aureus infection and improve neutrophil function in mice. Infect Immun 2014; 83:514-21. [PMID: 25404025 DOI: 10.1128/iai.02349-14] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Severe infection, including sepsis, is an increasing clinical problem that causes prolonged morbidity and substantial mortality. At present, antibiotics are essentially the only pharmacological treatment for sepsis. The incidence of resistance to antibiotics is increasing; therefore, it is critical to find new therapies for sepsis. Staphylococcus aureus is a major cause of septic mortality. Neutrophils play an important role in the defense against bacterial infections. We have shown that a diet with high levels of dietary saturated fatty acids decreases survival in septic mice, but the mechanisms behind this remain elusive. The aim of the present study was to investigate how the differences in dietary fat composition affect survival and bacterial load after experimental septic infection and neutrophil function in uninfected mice. We found that, after S. aureus infection, mice fed a polyunsaturated high-fat diet (HFD-P) for 8 weeks had increased survival and decreased bacterial load during sepsis compared with mice fed a saturated high-fat diet (HFD-S), similar to mice fed a low-fat diet (LFD). Uninfected mice fed HFD-P had a higher frequency of neutrophils in bone marrow than mice fed HFD-S. In addition, mice fed HFD-P had a higher frequency of neutrophils recruited to the site of inflammation in response to peritoneal injection of thioglycolate than mice fed HFD-S. Differences between the proportion of dietary protein and carbohydrate did not affect septic survival at all. In conclusion, polyunsaturated dietary fat increased both survival and efficiency of bacterial clearance during septic S. aureus infection. Moreover, this diet increased the frequency and chemotaxis of neutrophils, key components of the immune response to S. aureus infections.
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Makita N, Hizukuri Y, Yamashiro K, Murakawa M, Hayashi Y. IL-10 enhances the phenotype of M2 macrophages induced by IL-4 and confers the ability to increase eosinophil migration. Int Immunol 2014; 27:131-41. [DOI: 10.1093/intimm/dxu090] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Hoffmann J, Ospelt M, Troidl C, Voss S, Liebetrau C, Kim WK, Rolf A, Wietelmann A, Braun T, Troidl K, Sadayappan S, Barefield D, Hamm C, Nef H, Möllmann H. Sham surgery and inter-individual heterogeneity are major determinants of monocyte subset kinetics in a mouse model of myocardial infarction. PLoS One 2014; 9:e98456. [PMID: 24893162 PMCID: PMC4043649 DOI: 10.1371/journal.pone.0098456] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 05/04/2014] [Indexed: 11/18/2022] Open
Abstract
Aims Mouse models of myocardial infarction (MI) are commonly used to explore the pathophysiological role of the monocytic response in myocardial injury and to develop translational strategies. However, no study thus far has examined the potential impact of inter-individual variability and sham surgical procedures on monocyte subset kinetics after experimental MI in mice. Our goal was to investigate determinants of systemic myeloid cell subset shifts in C57BL/6 mice following MI by developing a protocol for sequential extensive flow cytometry (FCM). Methods and Results Following cross-sectional multiplex FCM analysis we provide for the first time a detailed description of absolute quantities, relative subset composition, and biological variability of circulating classical, intermediate, and non-classical monocyte subsets in C57BL/6 mice. By using intra-individual longitudinal measurements after MI induction, a time course of classical and non-classical monocytosis was recorded. This approach disclosed a significant reduction of monocyte subset dispersion across all investigated time points following MI. We found that in the current invasive model of chronic MI the global pattern of systemic monocyte kinetics is mainly determined by a nonspecific inflammatory response to sham surgery and not by the extent of myocardial injury. Conclusions Application of sequential multiplexed FCM may help to reduce the impact of biological variability in C57BL/6 mice. Furthermore, the confounding influence of sham surgical procedures should always be considered when measuring monocyte subset kinetics in a murine model of MI.
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Affiliation(s)
- Jedrzej Hoffmann
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
- * E-mail:
| | - Manuel Ospelt
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
| | - Christian Troidl
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
| | - Sandra Voss
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
| | - Christoph Liebetrau
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
- Department of Cardiology, University of Giessen, Medical Clinic I, Giessen, Germany
| | - Won-Keun Kim
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
| | - Andreas Rolf
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
- Department of Cardiology, University of Giessen, Medical Clinic I, Giessen, Germany
| | - Astrid Wietelmann
- Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Thomas Braun
- Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Kerstin Troidl
- Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Sakthivel Sadayappan
- Department of Cell and Molecular Physiology, Health Sciences Division, Loyola University Chicago, Maywood, Illinois, United States of America
| | - David Barefield
- Department of Cell and Molecular Physiology, Health Sciences Division, Loyola University Chicago, Maywood, Illinois, United States of America
| | - Christian Hamm
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
- Department of Cardiology, University of Giessen, Medical Clinic I, Giessen, Germany
| | - Holger Nef
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
- Department of Cardiology, University of Giessen, Medical Clinic I, Giessen, Germany
| | - Helge Möllmann
- Department of Cardiology, Kerckhoff Heart and Thorax Center, Bad Nauheim, Germany
- Department of Cardiology, University of Giessen, Medical Clinic I, Giessen, Germany
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Hope C, Ollar SJ, Heninger E, Hebron E, Jensen JL, Kim J, Maroulakou I, Miyamoto S, Leith C, Yang DT, Callander N, Hematti P, Chesi M, Bergsagel PL, Asimakopoulos F. TPL2 kinase regulates the inflammatory milieu of the myeloma niche. Blood 2014; 123:3305-15. [PMID: 24723682 PMCID: PMC4046426 DOI: 10.1182/blood-2014-02-554071] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 04/07/2014] [Indexed: 02/06/2023] Open
Abstract
Targeted modulation of microenvironmental regulatory pathways may be essential to control myeloma and other genetically/clonally heterogeneous cancers. Here we report that human myeloma-associated monocytes/macrophages (MAM), but not myeloma plasma cells, constitute the predominant source of interleukin-1β (IL-1β), IL-10, and tumor necrosis factor-α at diagnosis, whereas IL-6 originates from stromal cells and macrophages. To dissect MAM activation/cytokine pathways, we analyzed Toll-like receptor (TLR) expression in human myeloma CD14(+) cells. We observed coregulation of TLR2 and TLR6 expression correlating with local processing of versican, a proteoglycan TLR2/6 agonist linked to carcinoma progression. Versican has not been mechanistically implicated in myeloma pathogenesis. We hypothesized that the most readily accessible target in the versican-TLR2/6 pathway would be the mitogen-activated protein 3 (MAP3) kinase, TPL2 (Cot/MAP3K8). Ablation of Tpl2 in the genetically engineered in vivo myeloma model, Vκ*MYC, led to prolonged disease latency associated with plasma cell growth defect. Tpl2 loss abrogated the "inflammatory switch" in MAM within nascent myeloma lesions and licensed macrophage repolarization in established tumors. MYC activation/expression in plasma cells was independent of Tpl2 activity. Pharmacologic TPL2 inhibition in human monocytes led to dose-dependent attenuation of IL-1β induction/secretion in response to TLR2 stimulation. Our results highlight a TLR2/6-dependent TPL2 pathway as novel therapeutic target acting nonautonomously through macrophages to control myeloma progression.
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Affiliation(s)
- Chelsea Hope
- Department of Medicine, Division of Hematology/Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI; University of Wisconsin Carbone Cancer Center, Madison, WI
| | - Samuel J Ollar
- Department of Medicine, Division of Hematology/Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI; University of Wisconsin Carbone Cancer Center, Madison, WI
| | - Erika Heninger
- University of Wisconsin Carbone Cancer Center, Madison, WI
| | - Ellen Hebron
- Department of Medicine, Division of Hematology/Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI; University of Wisconsin Carbone Cancer Center, Madison, WI
| | - Jeffrey L Jensen
- Department of Medicine, Division of Hematology/Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI; University of Wisconsin Carbone Cancer Center, Madison, WI
| | - Jaehyup Kim
- Department of Medicine, Division of Hematology/Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI; University of Wisconsin Carbone Cancer Center, Madison, WI
| | - Ioanna Maroulakou
- Department of Molecular Biology and Genetics, Democritus University of Thrace, Alexandroupolis, Greece
| | - Shigeki Miyamoto
- University of Wisconsin Carbone Cancer Center, Madison, WI; Department of Oncology, University of Wisconsin-Madison, Madison, WI
| | - Catherine Leith
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI; and
| | - David T Yang
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI; and
| | - Natalie Callander
- Department of Medicine, Division of Hematology/Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI; University of Wisconsin Carbone Cancer Center, Madison, WI
| | - Peiman Hematti
- Department of Medicine, Division of Hematology/Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI; University of Wisconsin Carbone Cancer Center, Madison, WI
| | | | | | - Fotis Asimakopoulos
- Department of Medicine, Division of Hematology/Oncology, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI; University of Wisconsin Carbone Cancer Center, Madison, WI
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Basu A, Poddar D, Robinet P, Smith JD, Febbraio M, Baldwin WM, Mazumder B. Ribosomal protein L13a deficiency in macrophages promotes atherosclerosis by limiting translation control-dependent retardation of inflammation. Arterioscler Thromb Vasc Biol 2014; 34:533-42. [PMID: 24436370 DOI: 10.1161/atvbaha.113.302573] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Unresolved inflammatory response of macrophages plays a pivotal role in the pathogenesis of atherosclerosis. Previously we showed that ribosomal protein L13a-dependent translational silencing suppresses the synthesis of a cohort of inflammatory proteins in monocytes and macrophages. We also found that genetic abrogation of L13a expression in macrophages significantly compromised the resolution of inflammation in a mouse model of lipopolysaccharide-induced endotoxemia. However, its function in the pathogenesis of atherosclerosis is not known. Here, we examine whether L13a in macrophage has a protective role against high-fat diet-induced atherosclerosis. APPROACH AND RESULTS We bred the macrophage-specific L13a knockout mice L13a Flox(+/+) Cre(+/+) onto apolipoprotein E-deficient background and generated the experimental double knockout mice L13a Flox(+/+) Cre(+/+) apolipoprotein E deficient (apoE(-/-)). L13a Flox(+/+) Cre(-/-) mice on apolipoprotein E-deficient background were used as controls. Control and knockout mice were subjected to high-fat diet for 10 weeks. Evaluation of aortic sinus sections and entire aorta by en face showed significantly higher atherosclerosis in the knockout mice. Severity of atherosclerosis in knockout mice was accompanied by thinning of the smooth muscle cell layer in the media, larger macrophage area in the intimal plaque region and higher plasma levels of inflammatory cytokines. In addition, macrophages isolated from knockout mice had higher polyribosomal abundance of several target mRNAs, thus showing defect in translation control. CONCLUSIONS Our data demonstrate that loss of L13a in macrophages increases susceptibility to atherosclerosis in apolipoprotein E-deficient mice, revealing an important role of L13a-dependent translational control as an endogenous protection mechanism against atherosclerosis.
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Affiliation(s)
- Abhijit Basu
- From the Department of Biology, Geology, and Environmental Sciences, Center for Gene Regulation in Health and Disease, Cleveland State University, Cleveland, OH (A.B., D.P., B.M.); Department of Cellular and Molecular Medicine (P.R., J.D.S.), Department of Immunology (W.M.B.), and Department of Molecular Cardiology (M.F), Cleveland Clinic Lerner College of Medicine, Cleveland, OH
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Aged mice have increased inflammatory monocyte concentration and altered expression of cell-surface functional receptors. J Biosci 2012; 37:55-62. [PMID: 22357203 DOI: 10.1007/s12038-011-9169-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The expression of monocyte cell-surface receptors represents one index of immune dysfunction, which is common with aging. Although mouse models of aging are prevalent, monocyte subset assessment is rare. Our purpose was to compare cell receptor expression on classic (CD115+/Gr-1 high) and non-classic (CD115+/Gr-1 low) monocytes from 80- or 20-week-old CD-1 mice. Three-colour flow cytometry was used to determine the concentration of monocyte subsets and their respective cell-surface expression of TLR2, TLR4, CD80, CD86, MHC II and CD54. These receptors were selected because they have been previously associated with altered monocyte function. Data were analysed with independent t-tests; significance was set at P less than 0.05. Old mice had a greater concentration of both classic (258%, P=0.003) and non-classic (70%, P=0.026) monocytes. The classic : non-classic monocyte ratio doubled in old as compared with that in young mice (P=0.006), indicating a pro-inflammatory shift. TLR4 ( 27%, P=0.001) and CD80 ( 37%, P=0.004) were decreased on classic monocytes from old as compared with those from young mice. TLR2 ( 24%, P=0.002) and MHCII ( 21%, P=0.026) were altered on non-classic monocytes from old as compared with those from young mice. The increased classic : non-classic monocyte ratio combined with changes in the cell-surface receptor expression on both monocyte subsets is indicative of immune dysfunction, which may increase age-associated disease risk.
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