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Le Coz C, Trofa M, Butler DL, Yoon S, Tian T, Reid W, Cruz Cabrera E, Knox AVC, Khanna C, Sullivan KE, Heimall J, Takach P, Fadugba OO, Lawrence M, Jyonouchi S, Hakonarson H, Wells AD, Handler S, Zur KB, Pillai V, Gildersleeve JC, Romberg N. The common variable immunodeficiency IgM repertoire narrowly recognizes erythrocyte and platelet glycans. J Allergy Clin Immunol 2024:S0091-6749(24)00418-4. [PMID: 38692308 DOI: 10.1016/j.jaci.2024.04.018] [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: 08/04/2023] [Revised: 04/10/2024] [Accepted: 04/16/2024] [Indexed: 05/03/2024]
Abstract
BACKGROUND Autoimmune cytopenias (AICs) regularly occur in profoundly IgG-deficient patients with common variable immunodeficiency (CVID). The isotypes, antigenic targets, and origin(s) of their disease-causing autoantibodies are unclear. OBJECTIVE We sought to determine reactivity, clonality, and provenance of AIC-associated IgM autoantibodies in patients with CVID. METHODS We used glycan arrays, patient erythrocytes, and platelets to determine targets of CVID IgM autoantibodies. Glycan-binding profiles were used to identify autoreactive clones across B-cell subsets, specifically circulating marginal zone (MZ) B cells, for sorting and IGH sequencing. The locations, transcriptomes, and responses of tonsillar MZ B cells to different TH- cell subsets were determined by confocal microscopy, RNA-sequencing, and cocultures, respectively. RESULTS Autoreactive IgM coated erythrocytes and platelets from many CVID patients with AICs (CVID+AIC). On glycan arrays, CVID+AIC plasma IgM narrowly recognized erythrocytic i antigens and platelet i-related antigens and failed to bind hundreds of pathogen- and tumor-associated carbohydrates. Polyclonal i antigen-recognizing B-cell receptors were highly enriched among CVID+AIC circulating MZ B cells. Within tonsillar tissues, MZ B cells secreted copious IgM when activated by the combination of IL-10 and IL-21 or when cultured with IL-10/IL-21-secreting FOXP3-CD25hi T follicular helper (Tfh) cells. In lymph nodes from immunocompetent controls, MZ B cells, plentiful FOXP3+ regulatory T cells, and rare FOXP3-CD25+ cells that represented likely CD25hi Tfh cells all localized outside of germinal centers. In CVID+AIC lymph nodes, cellular positions were similar but CD25hi Tfh cells greatly outnumbered regulatory cells. CONCLUSIONS Our findings indicate that glycan-reactive IgM autoantibodies produced outside of germinal centers may contribute to the autoimmune pathogenesis of CVID.
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Affiliation(s)
- Carole Le Coz
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa; Infinity, Toulouse Institute for Infectious and Inflammatory Diseases, University of Toulouse, CNRS, Inserm, Toulouse, France
| | - Melissa Trofa
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa
| | - Dorothy L Butler
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Md
| | - Samuel Yoon
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa
| | - Tian Tian
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, Pa
| | - Whitney Reid
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa
| | - Emylette Cruz Cabrera
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa
| | - Ainsley V C Knox
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa
| | - Caroline Khanna
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa
| | - Kathleen E Sullivan
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa; Department of Pediatrics, Perelman School of Medicine, Philadelphia, Pa; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pa
| | - Jennifer Heimall
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa; Department of Pediatrics, Perelman School of Medicine, Philadelphia, Pa
| | - Patricia Takach
- Division of Pulmonary, Allergy and Critical Care, Department of Medicine, Perelman School of Medicine, Philadelphia, Pa
| | - Olajumoke O Fadugba
- Division of Pulmonary, Allergy and Critical Care, Department of Medicine, Perelman School of Medicine, Philadelphia, Pa
| | - Monica Lawrence
- Division of Asthma, Allergy and Immunology, Department of Medicine, University of Virginia, Charlottesville, Va
| | - Soma Jyonouchi
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa; Department of Pediatrics, Perelman School of Medicine, Philadelphia, Pa
| | - Hakon Hakonarson
- Center for Applied Genomics, Children's Hospital of Philadelphia, Philadelphia, Pa; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pa
| | - Andrew D Wells
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pa; Center for Spatial and Functional Genomics, Children's Hospital of Philadelphia, Philadelphia, Pa; Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, Pa
| | - Steven Handler
- Pediatric Otolaryngology, Children's Hospital of Philadelphia, Philadelphia, Pa; Department of Otolaryngology-Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pa
| | - Karen B Zur
- Pediatric Otolaryngology, Children's Hospital of Philadelphia, Philadelphia, Pa; Department of Otolaryngology-Head and Neck Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pa
| | - Vinodh Pillai
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pa; Division of Hematopathology, Children's Hospital of Philadelphia, Philadelphia, Pa
| | - Jeffrey C Gildersleeve
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Md
| | - Neil Romberg
- Division of Immunology and Allergy, Children's Hospital of Philadelphia, Philadelphia, Pa; Department of Pediatrics, Perelman School of Medicine, Philadelphia, Pa; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pa.
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Manfra A, Tun KM, Chang MJ, Wahi-Gururaj S. Oculomotor Nerve Palsy as a Manifestation of Immune Thrombocytopenic Purpura: A Case Report. Cureus 2022; 14:e29723. [PMID: 36320952 PMCID: PMC9617074 DOI: 10.7759/cureus.29723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/28/2022] [Indexed: 11/25/2022] Open
Abstract
Immune thrombocytopenic purpura (ITP) is caused by alterations in the immune system resulting in platelet destruction. It often manifests clinically with bleeding or on routine lab work revealing thrombocytopenia in asymptomatic individuals. Neurologic manifestations of this condition are sparsely documented in the literature. Among the symptoms reported were case reports of ischemic strokes, transient ischemic attacks, mononeuropathy multiplex, and polyneuropathy as neurological complications from immune thrombocytopenic purpura. Isolated cranial nerve palsies are uncommon. The following case describes a patient with immune thrombocytopenic purpura who presented with an isolated cranial nerve III palsy. A 55-year-old presented with pain in the right eye that was found in a downward and lateral gaze paralysis. There was no evidence of central or peripheral neurovascular etiology on imaging. However, workup revealed isolated thrombocytopenia with platelets <2000/ml3. Other possible etiologies, such as human immunodeficiency virus (HIV) and infectious etiologies, were evaluated and excluded. Thrombotic thrombocytopenia purpura was excluded with the results from ADAMTS13 (a disintegrin and metalloproteinase with a thrombospondin type 1 motif, member 13) activity. The patient was appropriately transfused with platelets and was treated with methylprednisolone, which improved his platelets. At the time of discharge, the patient continued to have cranial nerve III palsy and was referred to follow up with hematology on an outpatient basis. In prior case reports where ITP presented as neurological deficits, there was evidence of intraneural microhemorrhage. Our case is unique in that the primary neurologic presentation without central nervous system pathology eventually led to the diagnosis of ITP. The symptoms were attributed to microhemorrhages that were not detected in imaging studies. Further studies are warranted to explore any correlation or causative association between ITP and neurological symptoms. This case report highlights the need to consider uncommon but possible manifestations of conditions that may initially appear seemingly irrelevant to the patient’s chief complaint.
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Hamidpour M, Bashash D, Nehzati P, Abbasalizadeh M, Nikoogoftar M, Hamidpour R. The expression of hSR-B1 on platelets of patients with coronary artery disease (CAD). Clin Hemorheol Microcirc 2018; 71:9-15. [PMID: 29865042 DOI: 10.3233/ch-170311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION The human scavenger receptor class B type 1 (hSR-B1), which serves as a high affinity receptor for HDL, is expressed on platelet surface and mediates various anti-atherogenic functions. Based on the anti-thrombotic effect of HDL and the importance of HDL-SR-B1 in the formation of atherosclerotic plaque, the present study was aimed to investigate and compare the expression level of hSR-B1on platelets of CAD patients with that of normal controls. METHODS The expression of the hSR-B1 on platelets of 31 CAD patients with atherosclerotic plaque and 20 healthy controls were detected using flowcytometry and western blotting. Moreover, platelet function in response to the agonists was examined by aggregometry, and the lipid panel tests were assayed using chemistry autoanalyzer. RESULTS Our findings showed that the expression of hSR-B1 was significantly reduced on the surface of platelets from CAD patients with atherosclerotic disease, as compared with healthy controls (6/8% vs. 13/6%) (P < 0,001). Of particular of interest, we also found that the formation of aggregates after stimulation of the platelets with ADP was higher in patients with atherosclerotic disease than the controls; indicating an inverse relationship between hSR-B1 expression and the function of human platelets. CONCLUSION Taken together, the results of the present study raise the possibility that the measurement of hSR-B1 expression on human platelets may provide a valuable insight that reflects the status of RCT in patients with atherosclerosis.
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Affiliation(s)
- Mohsen Hamidpour
- Hemopoeitic Stem cell Research Centre (HSCRC), Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Davood Bashash
- Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Parisa Nehzati
- Student Research Committee, Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahnaz Abbasalizadeh
- Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahin Nikoogoftar
- Iranian Blood Transfusion Research Center, High Institute for Research and Education inTransfusion Medicine, Iranian Blood Transfusion Organization (IBTO), Tehran, Iran
| | - Rafie Hamidpour
- Departmentof Herbal Medicine, Pars Biosciences Research Center, Leawood, KS, USA
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Fraichard S, Bougé AL, Kendall T, Chauvel I, Bouhin H, Bunch TA. Tenectin is a novel alphaPS2betaPS integrin ligand required for wing morphogenesis and male genital looping in Drosophila. Dev Biol 2010; 340:504-17. [PMID: 20152825 DOI: 10.1016/j.ydbio.2010.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2009] [Revised: 01/29/2010] [Accepted: 02/02/2010] [Indexed: 10/19/2022]
Abstract
Morphogenesis of the adult structures of holometabolous insects is regulated by ecdysteroids and juvenile hormones and involves cell-cell interactions mediated in part by the cell surface integrin receptors and their extracellular matrix (ECM) ligands. These adhesion molecules and their regulation by hormones are not well characterized. We describe the gene structure of a newly described ECM molecule, tenectin, and demonstrate that it is a hormonally regulated ECM protein required for proper morphogenesis of the adult wing and male genitalia. Tenectin's function as a new ligand of the PS2 integrins is demonstrated by both genetic interactions in the fly and by cell spreading and cell adhesion assays in cultured cells. Its interaction with the PS2 integrins is dependent on RGD and RGD-like motifs. Tenectin's function in looping morphogenesis in the development of the male genitalia led to experiments that demonstrate a role for PS integrins in the execution of left-right asymmetry.
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Affiliation(s)
- Stéphane Fraichard
- Centre des Sciences du Goût et de l'Alimentation, UMR-6265 CNRS, INRA, Université de Bourgogne, Agrosup Dijon, F-21000 Dijon, France
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Equine herpesvirus 1 entry via endocytosis is facilitated by alphaV integrins and an RSD motif in glycoprotein D. J Virol 2008; 82:11859-68. [PMID: 18815313 DOI: 10.1128/jvi.00868-08] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Equine herpesvirus 1 (EHV-1) is a member of the Alphaherpesvirinae, and its broad tissue tropism suggests that EHV-1 may use multiple receptors to initiate virus entry. EHV-1 entry was thought to occur exclusively through fusion at the plasma membrane, but recently entry via the endocytic/phagocytic pathway was reported for Chinese hamster ovary cells (CHO-K1 cells). Here we show that cellular integrins, and more specifically those recognizing RGD motifs such as alphaVbeta5, are important during the early steps of EHV-1 entry via endocytosis in CHO-K1 cells. Moreover, mutational analysis revealed that an RSD motif in the EHV-1 envelope glycoprotein D (gD) is critical for entry via endocytosis. In addition, we show that EHV-1 enters peripheral blood mononuclear cells predominantly via the endocytic pathway, whereas in equine endothelial cells entry occurs mainly via fusion at the plasma membrane. Taken together, the data in this study provide evidence that EHV-1 entry via endocytosis is triggered by the interaction between cellular integrins and the RSD motif present in gD and, moreover, that EHV-1 uses different cellular entry pathways to infect important target cell populations of its natural host.
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