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Katagiri T, Espinoza JL, Uemori M, Ikeda H, Hosokawa K, Ishiyama K, Yoroidaka T, Imi T, Takamatsu H, Ozawa T, Kishi H, Yamamoto Y, Elbadry MI, Yoshida Y, Chonabayashi K, Takenaka K, Akashi K, Nannya Y, Ogawa S, Nakao S. Hematopoietic stem progenitor cells with malignancy‐related gene mutations in patients with acquired aplastic anemia are characterized by the increased expression of CXCR4. EJHAEM 2022; 3:669-680. [PMID: 36051022 PMCID: PMC9422028 DOI: 10.1002/jha2.515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/06/2022] [Accepted: 06/08/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Takamasa Katagiri
- Department of Clinical Laboratory Science Graduate School of Medical Science Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
| | - Jorge Luis Espinoza
- Department of Occupational Therapy Graduate School of Medical Science Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
| | - Mizuho Uemori
- Department of Clinical Laboratory Science Graduate School of Medical Science Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
| | - Honoka Ikeda
- Department of Clinical Laboratory Science Graduate School of Medical Science Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
| | - Kohei Hosokawa
- Department of Hematology Faculty of Medicine Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
| | - Ken Ishiyama
- Department of Hematology Faculty of Medicine Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
| | - Takeshi Yoroidaka
- Department of Hematology Faculty of Medicine Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
| | - Tatsuya Imi
- Department of Hematology Faculty of Medicine Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
| | - Hiroyuki Takamatsu
- Department of Hematology Faculty of Medicine Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
| | - Tatsuhiko Ozawa
- Department of Immunology Faculty of Medicine Academic Assembly University of Toyama Toyama City Toyama Japan
| | - Hiroyuki Kishi
- Department of Immunology Faculty of Medicine Academic Assembly University of Toyama Toyama City Toyama Japan
| | - Yasuhiko Yamamoto
- Department of Biochemistry and Molecular Vascular Biology Kanazawa University Graduate School of Medical Sciences Kanazawa Ishikawa Japan
| | - Mahmoud Ibrahim Elbadry
- Division of Hematology Department of Internal Medicine Faculty of Medicine Sohag University Sohag Egypt
| | - Yoshinori Yoshida
- Center for iPS Cell Research and Application Kyoto University Sakyo‐ku Kyoto Japan
| | - Kazuhisa Chonabayashi
- Center for iPS Cell Research and Application Kyoto University Sakyo‐ku Kyoto Japan
- Department of Hematology and Oncology Graduate School of Medicine Kyoto University Sakyo‐ku Kyoto Japan
| | - Katsuto Takenaka
- Department of Hematology Clinical Immunology and Infectious Diseases Ehime University Graduate School of Medicine Toon Ehime Japan
| | - Koichi Akashi
- Department of Medicine and Biosystemic Science Kyushu University Graduate School of Medical Sciences Fukuoka City Fukuoka Japan
| | - Yasuhito Nannya
- Division of Hematopoietic Disease Control Institute of Medical Science University of Tokyo Minato‐ku Tokyo Japan
- Department of Pathology and Tumor Biology Kyoto University Yoshida‐Konoe‐cho Sakyo‐ku Kyoto Japan
| | - Seishi Ogawa
- Department of Pathology and Tumor Biology Kyoto University Yoshida‐Konoe‐cho Sakyo‐ku Kyoto Japan
- Institute for the Advanced Study of Human Biology (WPI‐ASHBi) Kyoto University Sakyo‐ku Kyoto Japan
- Department of Medicine Centre for Hematology and Regenerative Medicine Karolinska Institute Stockholm Sweden
| | - Shinji Nakao
- Department of Hematology Faculty of Medicine Institute of Medical Pharmaceutical and Health Sciences Kanazawa University Kanazawa Ishikawa Japan
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Innate immunity orchestrates the mobilization and homing of hematopoietic stem/progenitor cells by engaging purinergic signaling-an update. Purinergic Signal 2020; 16:153-166. [PMID: 32415576 DOI: 10.1007/s11302-020-09698-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 03/30/2020] [Indexed: 02/07/2023] Open
Abstract
Bone marrow (BM) as an active hematopoietic organ is highly sensitive to changes in body microenvironments and responds to external physical stimuli from the surrounding environment. In particular, BM tissue responds to several cues related to infections, strenuous exercise, tissue/organ damage, circadian rhythms, and physical challenges such as irradiation. These multiple stimuli affect BM cells to a large degree through a coordinated response of the innate immunity network as an important guardian for maintaining homeostasis of the body. In this review, we will foc++us on the role of purinergic signaling and innate immunity in the trafficking of hematopoietic stem/progenitor cells (HSPCs) during their egression from the BM into peripheral blood (PB), as seen along pharmacological mobilization, and in the process of homing and subsequent engraftment into BM after hematopoietic transplantation. Innate immunity mediates these processes by engaging, in addition to certain peptide-based factors, other important non-peptide mediators, including bioactive phosphosphingolipids and extracellular nucleotides, as the main topic of this review. Elucidation of these mechanisms will allow development of more efficient stem cell mobilization protocols to harvest the required number of HSPCs for transplantation and to accelerate hematopoietic reconstitution in transplanted patients.
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The Involvment of Hematopoietic-Specific PLC -β2 in Homing and Engraftment of Hematopoietic Stem/Progenitor Cells. Stem Cell Rev Rep 2017; 12:613-620. [PMID: 27704316 PMCID: PMC5106505 DOI: 10.1007/s12015-016-9689-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Migration and bone marrow (BM) homing of hematopoietic stem progenitor cells (HSPCs) is regulated by several signaling pathways, and here we provide evidence for the involvement in this process of hematopoietic-specific phospholipase C-β2 (PLC-β2). This enzyme is involved in release of intracellular calcium and activation of protein kinase C (PKC). Recently we reported that PLC-β2 promotes mobilization of HSPCs from BM into peripheral blood (PB), and this effect is mediated by the involvement of PLC-β2 in the release of proteolytic enzymes from granulocytes and its role in disintegration of membrane lipid rafts. Here we report that, besides the role of PLC-β2 in the release of HSPCs from BM niches, PLC-β2 regulates the migration of HSPCs in response to chemotactic gradients of BM homing factors, including SDF-1, S1P, C1P, and ATP. Specifically, HSPCs from PLC-β2-KO mice show impaired homing and engraftment in vivo after transplantation into lethally irradiated mice. This decrease in migration of HSPCs can be explained by impaired calcium release in PLC-β2-KO mice and a high baseline level of heme oxygenase 1 (HO-1), an enzyme that negatively regulates cell migration.
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Serum-derived extracellular vesicles (EVs) impact on vascular remodeling and prevent muscle damage in acute hind limb ischemia. Sci Rep 2017; 7:8180. [PMID: 28811546 PMCID: PMC5557987 DOI: 10.1038/s41598-017-08250-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 07/10/2017] [Indexed: 12/21/2022] Open
Abstract
Serum is an abundant and accessible source of circulating extracellular vesicles (EVs). Serum-EV (sEV) pro-angiogenic capability and mechanisms are herein analyzed using an in vitro assay which predicts sEV angiogenic potential in vivo. Effective sEVs (e-sEVs) also improved vascular remodeling and prevented muscle damage in a mouse model of acute hind limb ischemia. e-sEV angiogenic proteomic and transcriptomic analyses show a positive correlation with matrix-metalloproteinase activation and extracellular matrix organization, cytokine and chemokine signaling pathways, Insulin-like Growth Factor and platelet pathways, and Vascular Endothelial Growth Factor signaling. A discrete gene signature, which highlights differences in e-sEV and ineffective-EV biological activity, was identified using gene ontology (GO) functional analysis. An enrichment of genes associated with the Transforming Growth Factor beta 1 (TGFβ1) signaling cascade is associated with e-sEV administration but not with ineffective-EVs. Chromatin immunoprecipitation analysis on the inhibitor of DNA binding I (ID1) promoter region, and the knock-down of small mother against decapentaplegic (SMAD)1–5 proteins confirmed GO functional analyses. This study demonstrates sEV pro-angiogenic activity, validates a simple, sEV pro-angiogenic assay which predicts their biological activity in vivo, and identifies the TGFβ1 cascade as a relevant mediator. We propose serum as a readily available source of EVs for therapeutic purposes.
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Bernardini G, Antonangeli F, Bonanni V, Santoni A. Dysregulation of Chemokine/Chemokine Receptor Axes and NK Cell Tissue Localization during Diseases. Front Immunol 2016; 7:402. [PMID: 27766097 PMCID: PMC5052267 DOI: 10.3389/fimmu.2016.00402] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Accepted: 09/21/2016] [Indexed: 01/06/2023] Open
Abstract
Chemokines are small chemotactic molecules that play key roles in physiological and pathological conditions. Upon signaling via their specific receptors, chemokines regulate tissue mobilization and trafficking of a wide array of immune cells, including natural killer (NK) cells. Current research is focused on analyzing changes in chemokine/chemokine receptor expression during various diseases to interfere with pathological trafficking of cells or to recruit selected cell types to specific tissues. NK cells are a heterogeneous lymphocyte population comprising several subsets endowed with distinct functional properties and mainly representing distinct stages of a linear development process. Because of their different functional potential, the type of subset that accumulates in a tissue drives the final outcome of NK cell-regulated immune response, leading to either protection or pathology. Correspondingly, chemokine receptors, including CXCR4, CXCR3, and CX3CR1, are differentially expressed by NK cell subsets, and their expression levels can be modulated during NK cell activation. At first, this review will summarize the current knowledge on the contribution of chemokines to the localization and generation of NK cell subsets in homeostasis. How an inappropriate chemotactic response can lead to pathology and how chemokine targeting can therapeutically affect tissue recruitment/localization of distinct NK cell subsets will also be discussed.
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Affiliation(s)
- Giovanni Bernardini
- Department of Molecular Medicine, Sapienza University, Rome, Italy; IRCCS NEUROMED - Mediterranean Neurological Institute, Isernia, Italy
| | | | - Valentina Bonanni
- Department of Molecular Medicine, Sapienza University , Rome , Italy
| | - Angela Santoni
- IRCCS NEUROMED - Mediterranean Neurological Institute, Isernia, Italy; Department of Molecular Medicine, Istituto Pasteur-Fondazione Cenci Bolognetti, Rome, Italy
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Evidence that a lipolytic enzyme--hematopoietic-specific phospholipase C-β2--promotes mobilization of hematopoietic stem cells by decreasing their lipid raft-mediated bone marrow retention and increasing the promobilizing effects of granulocytes. Leukemia 2015; 30:919-28. [PMID: 26582648 PMCID: PMC4823158 DOI: 10.1038/leu.2015.315] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2015] [Revised: 10/14/2015] [Accepted: 10/26/2015] [Indexed: 12/26/2022]
Abstract
Hematopoietic stem/progenitor cells (HSPCs) reside in the bone marrow (BM) microenvironment and are retained there by the interaction of membrane lipid raft-associated receptors, such as the α-chemokine receptor CXCR4 and the α4β1-integrin (VLA-4, very late antigen 4 receptor) receptor, with their respective specific ligands, stromal-derived factor 1 and vascular cell adhesion molecule 1, expressed in BM stem cell niches. The integrity of the lipid rafts containing these receptors is maintained by the glycolipid glycosylphosphatidylinositol anchor (GPI-A). It has been reported that a cleavage fragment of the fifth component of the activated complement cascade, C5a, has an important role in mobilizing HSPCs into the peripheral blood (PB) by (i) inducing degranulation of BM-residing granulocytes and (ii) promoting their egress from the BM into the PB so that they permeabilize the endothelial barrier for subsequent egress of HSPCs. We report here that hematopoietic cell-specific phospholipase C-β2 (PLC-β2) has a crucial role in pharmacological mobilization of HSPCs. On the one hand, when released during degranulation of granulocytes, it digests GPI-A, thereby disrupting membrane lipid rafts and impairing retention of HSPCs in BM niches. On the other hand, it is an intracellular enzyme required for degranulation of granulocytes and their egress from BM. In support of this dual role, we demonstrate that PLC-β2-knockout mice are poor mobilizers and provide, for the first time, evidence for the involvement of this lipolytic enzyme in the mobilization of HSPCs.
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Ratajczak MZ, Borkowska S, Mierzejewska K, Kucia M, Mendek-Czajkowska E, Suszynska M, Sharma VA, Deptala A, Song W, Platzbecker U, Larratt L, Janowska-Wieczorek A, Maciejewski J, Ratajczak J. Further evidence that paroxysmal nocturnal haemoglobinuria is a disorder of defective cell membrane lipid rafts. J Cell Mol Med 2015; 19:2193-201. [PMID: 26033571 PMCID: PMC4568924 DOI: 10.1111/jcmm.12605] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 03/30/2015] [Indexed: 12/30/2022] Open
Abstract
The glycolipid glycosylphosphatidylinositol anchor (GPI-A) plays an important role in lipid raft formation, which is required for proper expression on the cell surface of two inhibitors of the complement cascade, CD55 and CD59. The absence of these markers from the surface of blood cells, including erythrocytes, makes the cells susceptible to complement lysis, as seen in patients suffering from paroxysmal nocturnal haemoglobinuria (PNH). However, the explanation for why PNH-affected hematopoietic stem/progenitor cells (HSPCs) expand over time in BM is still unclear. Here, we propose an explanation for this phenomenon and provide evidence that a defect in lipid raft formation in HSPCs leads to defective CXCR4- and VLA-4-mediated retention of these cells in BM. In support of this possibility, BM-isolated CD34+ cells from PNH patients show a defect in the incorporation of CXCR4 and VLA-4 into membrane lipid rafts, respond weakly to SDF-1 stimulation, and show defective adhesion to fibronectin. Similar data were obtained with the GPI-A− Jurkat cell line. Moreover, we also report that chimeric mice transplanted with CD55−/− CD59−/− BM cells but with proper GPI-A expression do not expand over time in transplanted hosts. On the basis of these findings, we propose that a defect in lipid raft formation in PNH-mutated HSPCs makes these cells more mobile, so that they expand and out-compete normal HSPCs from their BM niches over time.
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Affiliation(s)
- Mariusz Z Ratajczak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA.,Department of Regenerative Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Sylwia Borkowska
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA
| | - Kasia Mierzejewska
- Department of Physiology, Pomeranian Medical University, Szczecin, Poland
| | - Magda Kucia
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA.,Department of Regenerative Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Ewa Mendek-Czajkowska
- Central Clinical Hospital MSW, Poland and Medical University of Warsaw, Warsaw, Poland
| | - Malwina Suszynska
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA
| | - Vivek A Sharma
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA
| | - Andrzej Deptala
- Central Clinical Hospital MSW, Poland and Medical University of Warsaw, Warsaw, Poland
| | - Wechao Song
- Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Loree Larratt
- Department of Medicine, University of Alberta, Edmonton, AB, Canada
| | | | | | - Janina Ratajczak
- Stem Cell Institute at James Graham Brown Cancer Center, University of Louisville, Louisville, KY, USA
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Altered natural killer cell subset homeostasis and defective chemotactic responses in paroxysmal nocturnal hemoglobinuria. Blood 2013; 122:1887-90. [PMID: 23881915 DOI: 10.1182/blood-2013-06-507574] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In paroxysmal nocturnal hemoglobinuria (PNH), hematopoietic cells lacking glycosylphosphatidylinositol (GPI)-linked proteins on their surface (GPI(neg)) exist alongside normal (GPI+) cells. Analysis of natural killer (NK) cell subsets in 47 PNH patients revealed that the ratio of CD56(bright):CD56(dim) NK cells differed in the GPI+ and GPI(neg) populations, with GPI(neg)CD56(bright) NK cells significantly more abundant in peripheral blood than their normal GPI+ counterparts. Indeed, GPI+CD56(bright) NK cells were not detected in the peripheral blood of some patients, suggesting their trafficking to a niche unavailable to the GPI(neg)CD56(bright) NK cell population. Defective cellular trafficking in this disease was supported by findings showing differential chemokine receptor expression between GPI+ and GPI(neg) NK cells and impaired stromal cell-derived factor 1 (SDF-1)-induced chemotaxis of GPI(neg) NK cells. Our results indicate a role for GPI-linked proteins in NK cell subset homeostasis and suggest that differential chemokine responses might contribute to the balance of GPI+ and GPI(neg) populations in this disease.
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Abstract
Biomarkers are of tremendous importance for the prediction, diagnosis, and observation of the therapeutic success of common complex multifactorial metabolic diseases, such as type II diabetes and obesity. However, the predictive power of the traditional biomarkers used (eg, plasma metabolites and cytokines, body parameters) is apparently not sufficient for reliable monitoring of stage-dependent pathogenesis starting with the healthy state via its initiation and development to the established disease and further progression to late clinical outcomes. Moreover, the elucidation of putative considerable differences in the underlying pathogenetic pathways (eg, related to cellular/tissue origin, epigenetic and environmental effects) within the patient population and, consequently, the differentiation between individual options for disease prevention and therapy - hallmarks of personalized medicine - plays only a minor role in the traditional biomarker concept of metabolic diseases. In contrast, multidimensional and interdependent patterns of genetic, epigenetic, and phenotypic markers presumably will add a novel quality to predictive values, provided they can be followed routinely along the complete individual disease pathway with sufficient precision. These requirements may be fulfilled by small membrane vesicles, which are so-called exosomes and microvesicles (EMVs) that are released via two distinct molecular mechanisms from a wide variety of tissue and blood cells into the circulation in response to normal and stress/pathogenic conditions and are equipped with a multitude of transmembrane, soluble and glycosylphosphatidylinositol-anchored proteins, mRNAs, and microRNAs. Based on the currently available data, EMVs seem to reflect the diverse functional and dysfunctional states of the releasing cells and tissues along the complete individual pathogenetic pathways underlying metabolic diseases. A critical step in further validation of EMVs as biomarkers will rely on the identification of unequivocal correlations between critical disease states and specific EMV signatures, which in future may be determined in rapid and convenient fashion using nanoparticle-driven biosensors.
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Affiliation(s)
- Günter Müller
- Department of Biology I, Genetics, Ludwig-Maximilians University Munich, Biocenter, Munich, Germany
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Ratajczak J, Kucia M, Mierzejewska K, Liu R, Kim CH, Natarajan N, Sharma V, Miller DM, Maciejewski J, Ratajczak MZ. A novel view of paroxysmal nocturnal hemoglobinuria pathogenesis: more motile PNH hematopoietic stem/progenitor cells displace normal HSPCs from their niches in bone marrow due to defective adhesion, enhanced migration and mobilization in response to erythrocyte-released sphingosine-1 phosphate gradient. Leukemia 2012; 26:1722-5. [PMID: 22343521 DOI: 10.1038/leu.2012.46] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Jankowska AM, Szpurka H, Calabro M, Mohan S, Schade AE, Clemente M, Silverstein RL, Maciejewski JP. Loss of expression of neutrophil proteinase-3: a factor contributing to thrombotic risk in paroxysmal nocturnal hemoglobinuria. Haematologica 2011; 96:954-62. [PMID: 21546506 PMCID: PMC3128213 DOI: 10.3324/haematol.2010.029298] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2010] [Revised: 04/14/2011] [Accepted: 04/15/2011] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND A deficiency of specific glycosylphosphatidyl inositol-anchored proteins in paroxysmal nocturnal hemoglobinuria may be responsible for most of the clinical features of this disease, but some functional consequences may be indirect. For example, the absence of certain glycosylphosphatidyl inositol-anchored proteins in paroxysmal nocturnal hemoglobinuria cells may influence expression of other membrane proteins. Membrane-bound proteinase 3 co-localizes with glycosylphosphatidyl inositol-linked neutrophil antigen 2a, which is absent in patients with paroxysmal nocturnal hemoglobinuria. DESIGN AND METHODS We compared expression of proteinase 3 and neutrophil antigen 2a by flow cytometry and western blotting in normal and paroxysmal nocturnal hemoglobinuria cells and measured cytoplasmic and soluble levels of proteinase 3 by enzyme-linked immunosorbent assays in controls and patients with paroxysmal nocturnal hemoglobinuria. Finally, we studied the effects of proteinase 3 on platelet activation using an in vitro aggregometry assay and flow cytometry. RESULTS We showed that membrane-bound proteinase 3 is deficient in patients' cells, but invariantly present in the cytoplasm regardless of disease phenotype. When we isolated lipid rafts from patients, both molecules were detected only in the rafts from normal cells, but not diseased ones. Membrane-bound proteinase 3 was associated with a decrease in plasma proteinase 3 levels, clone size and history of thrombosis. In addition, we found that treating platelets ex vivo with proteinase 3, but not other agonists, decreased the exposure of an epitope on protease activated receptor-1 needed for thrombin activation. Conversely, treatment of whole blood with serine protease inhibitor enhanced expression of this epitope on protease activated receptor-1 located C-terminal to the thrombin cleavage site on platelets. CONCLUSIONS We demonstrated that deficiency of glycosylphosphatidyl inositol-anchored proteins in paroxysmal nocturnal hemoglobinuria results in decreased membrane-bound and soluble proteinase 3 levels. This phenomenon may constitute another mechanism contributing to a prothrombotic propensity in patients with paroxysmal nocturnal hemoglobinuria.
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Affiliation(s)
- Anna M. Jankowska
- Department of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic, Cleveland OH, USA
| | - Hadrian Szpurka
- Department of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic, Cleveland OH, USA
| | - Mark Calabro
- Department of Cell Biology, Lerner Research Institute, Cleveland Clinic, Cleveland OH, USA
| | - Sanjay Mohan
- Department of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic, Cleveland OH, USA
- Department of Hematologic Oncology and Blood Disorders, Taussig Cancer Institute, Cleveland Clinic, Cleveland OH, USA
| | - Andrew E. Schade
- Department of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic, Cleveland OH, USA
- Laboratory Medicine Institute, Cleveland Clinic, Cleveland OH, USA
| | - Michael Clemente
- Department of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic, Cleveland OH, USA
| | - Roy L. Silverstein
- Department of Cell Biology, Lerner Research Institute, Cleveland Clinic, Cleveland OH, USA
- Department of Hematologic Oncology and Blood Disorders, Taussig Cancer Institute, Cleveland Clinic, Cleveland OH, USA
| | - Jaroslaw P. Maciejewski
- Department of Translational Hematology and Oncology Research, Taussig Cancer Institute, Cleveland Clinic, Cleveland OH, USA
- Department of Hematologic Oncology and Blood Disorders, Taussig Cancer Institute, Cleveland Clinic, Cleveland OH, USA
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Rachidi S, Musallam KM, Taher AT. A closer look at paroxysmal nocturnal hemoglobinuria. Eur J Intern Med 2010; 21:260-7. [PMID: 20603032 DOI: 10.1016/j.ejim.2010.04.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2010] [Accepted: 04/05/2010] [Indexed: 12/28/2022]
Abstract
Knowledge of the molecular mechanisms leading to the paroxysmal nocturnal hemoglobinuria (PNH) phenotypes has substantially increased in the past two decades. The associated intravascular hemolysis, hypercoagulablilty, and bone marrow failure result in a wide range of clinical sequlae. Although treatment has usually been symptomatic through several modalities and rarely curative through hematopoietic cell transplantation, recent development of the novel targeted therapeutic agent eculizumab has offered new promises for this highly morbid and fatal disease. This review summarizes current knowledge of the pathophysiology, diagnostic modalities, clinical implications, and treatment approaches of patients with PNH.
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MESH Headings
- Anemia, Hemolytic/etiology
- Anemia, Hemolytic/physiopathology
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized
- Blood Coagulation/physiology
- Blood Coagulation Disorders/etiology
- Blood Coagulation Disorders/physiopathology
- Hemoglobinuria, Paroxysmal/complications
- Hemoglobinuria, Paroxysmal/diagnosis
- Hemoglobinuria, Paroxysmal/genetics
- Hemoglobinuria, Paroxysmal/physiopathology
- Hemoglobinuria, Paroxysmal/therapy
- Hemolysis/physiology
- Humans
- Kidney Diseases/etiology
- Kidney Diseases/physiopathology
- Prognosis
- Thrombosis/etiology
- Thrombosis/physiopathology
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Affiliation(s)
- Saleh Rachidi
- Department of Internal Medicine, Division of Hematology & Oncology, American University of Beirut Medical Center, Beirut, Lebanon
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Visconte V, Raghavachari N, Liu D, Keyvanfar K, Desierto MJ, Chen J, Young NS. Phenotypic and functional characterization of a mouse model of targeted Pig-a deletion in hematopoietic cells. Haematologica 2009; 95:214-23. [PMID: 19679885 DOI: 10.3324/haematol.2009.011650] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Somatic mutation in the X-linked phosphatidylinositol glycan class A gene (PIG-A) causes glycosyl phosphatidylinositol anchor deficiency in human patients with paroxysmal nocturnal hemoglobinuria. DESIGN AND METHODS We produced an animal model of paroxysmal nocturnal hemoglobinuria by conditional Pig-a gene inactivation (Pig-a(-/-)) in hematopoietic cells; mice carrying two lox sites flanking exon 6 of the Pig-a gene were bred with mice carrying the transgene Cre-recombinase under the human c-fes promoter. We characterized the phenotypic and functional properties of glycosyl phosphatidylinositol-deficient and glycosyl phosphatidylinositol-normal hematopoietic cells from these Pig-a(-/-) mice using gene expression microarray, flow cytometry, bone marrow transplantation, spectratyping, and immunoblotting. RESULTS In comparison to glycosyl phosphatidylinositol-normal bone marrow cells, glycosyl phosphatidylinositol-deficient bone marrow cells from the same Pig-a(-/-) animals showed up-regulation of the expression of immune function genes and contained a significantly higher proportion of CD8 T cells. Both characteristics were maintained when glycosyl phosphatidylinositol-deficient cells were transplanted into lethally-irradiated recipients. Glycosyl phosphatidylinositol-deficient T cells were inactive, showed pronounced Vbeta5.1/5.2 skewing, had fewer gamma-interferon-producing cells after lectin stimulation, and contained fewer CD4(+)CD25(+)FoxP3(+) regulatory T cells. However, the levels of T-cell receptor signaling proteins from glycosyl phosphatidylinositol-deficient cells were normal relative to glycosyl phosphatidylinositol-normal cells from wild type animals, and cells were capable of inducing target cell apoptosis in vitro. CONCLUSIONS Deletion of the Pig-a gene in hematopoietic cells does not cause frank marrow failure but leads to the appearance of clonally-restricted, inactive yet functionally competent CD8 T cells.
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Affiliation(s)
- Valeria Visconte
- Hematology Branch, NHLBI, National Institutes of Health, Bethesda, MD 20892-1202 USA.
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14
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EMS mutant spectra generated by multi-parameter flow cytometry. Mutat Res 2009; 671:6-12. [PMID: 19463836 DOI: 10.1016/j.mrfmmm.2009.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Revised: 03/31/2009] [Accepted: 05/11/2009] [Indexed: 11/23/2022]
Abstract
The CHO A(L) cell line contains a single copy of human chromosome 11 that encodes several cell surface proteins including glycosyl phosphatidylinositol (GPI) linked CD59 and CD90, as well as CD98, CD44 and CD151 which are not GPI-linked. The flow cytometry mutation assay (FCMA) measures mutations of the CD59 gene by the absence of fluorescence when stained with antibodies against the CD59 cell surface protein. We have measured simultaneous mutations in CD59, CD44, CD90, CD98 and CD151 to generate a mutant spectrum for ionizing radiation. After treatment with ethyl methanesulfonate (EMS) many cells have an intermediate level of CD59 staining. Single cells were sorted from CD59(-) regions with varying levels of fluorescence and the resulting clonal populations had a stable phenotype for CD59 expression. Mutant spectra were generated by flow cytometry using the isolated clones and nearly all clones were mutated in CD59 only. Interestingly, about 60% of the CD59 negative clones were actually GPI mutants determined by staining with the GPI specific fluorescently labeled bacterial toxin aerolysin (FLAER). The GPI negative cells are most likely caused by mutations in the X-linked pigA gene important in GPI biosynthesis. Small mutations of pigA and CD59 were expected for the alkylating agent EMS and the resulting spectra are significantly different than the large deletions found when analyzing radiation mutants. After analyzing the CD59(-) clonal populations we have adjusted the FCMA mutant regions from 1% to 10% of the mean of the CD59 positive peak to include the majority of CD59 mutants.
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