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Zung N, Aravindan N, Boshnakovska A, Valenti R, Preminger N, Jonas F, Yaakov G, Willoughby MM, Homberg B, Keller J, Kupervaser M, Dezorella N, Dadosh T, Wolf SG, Itkin M, Malitsky S, Brandis A, Barkai N, Fernández-Busnadiego R, Reddi AR, Rehling P, Rapaport D, Schuldiner M. The molecular mechanism of on-demand sterol biosynthesis at organelle contact sites. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.09.593285. [PMID: 38766039 PMCID: PMC11100823 DOI: 10.1101/2024.05.09.593285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Contact-sites are specialized zones of proximity between two organelles, essential for organelle communication and coordination. The formation of contacts between the Endoplasmic Reticulum (ER), and other organelles, relies on a unique membrane environment enriched in sterols. However, how these sterol-rich domains are formed and maintained had not been understood. We found that the yeast membrane protein Yet3, the homolog of human BAP31, is localized to multiple ER contact sites. We show that Yet3 interacts with all the enzymes of the post-squalene ergosterol biosynthesis pathway and recruits them to create sterol-rich domains. Increasing sterol levels at ER contacts causes its depletion from the plasma membrane leading to a compensatory reaction and altered cell metabolism. Our data shows that Yet3 provides on-demand sterols at contacts thus shaping organellar structure and function. A molecular understanding of this protein's functions gives new insights into the role of BAP31 in development and pathology.
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Affiliation(s)
- Naama Zung
- Department of Molecular Genetics, Weizmann Institute of Science, Israel
| | - Nitya Aravindan
- Interfaculty Institute of Biochemistry, University of Tuebingen, Germany
| | - Angela Boshnakovska
- Department of Cellular Biochemistry, University Medical Center Göttingen, Germany
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Translational Neuroinflammation and Automated Microscopy, Germany
- Max Planck Institute for Multidisciplinary Sciences, D-37077, Germany
| | - Rosario Valenti
- Department of Molecular Genetics, Weizmann Institute of Science, Israel
| | - Noga Preminger
- Department of Molecular Genetics, Weizmann Institute of Science, Israel
| | - Felix Jonas
- Department of Molecular Genetics, Weizmann Institute of Science, Israel
| | - Gilad Yaakov
- Department of Molecular Genetics, Weizmann Institute of Science, Israel
| | - Mathilda M Willoughby
- School of Chemistry and Biochemistry, Georgia Institute of Technology, USA
- Biochemistry and Molecular Biology Department, University of Nebraska Medical Center, USA
| | - Bettina Homberg
- Department of Cellular Biochemistry, University Medical Center Göttingen, Germany
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Translational Neuroinflammation and Automated Microscopy, Germany
- Max Planck Institute for Multidisciplinary Sciences, D-37077, Germany
| | - Jenny Keller
- University Medical Center Göttingen, Institute for Neuropathology, 37077, Germany
- Collaborative Research Center 1190 "Compartmental Gates and Contact Sites in Cells", University of Göttingen, Germany
| | - Meital Kupervaser
- The De Botton Protein Profiling institute of the Nancy and Stephen Grand Israel National Center for Personalized Medicine, Weizmann Institute of Science, Israel
| | - Nili Dezorella
- Electron Microscopy Unit, Chemical Research Support, Weizmann Institute of Science, Israel
| | - Tali Dadosh
- Electron Microscopy Unit, Chemical Research Support, Weizmann Institute of Science, Israel
| | - Sharon G Wolf
- Electron Microscopy Unit, Chemical Research Support, Weizmann Institute of Science, Israel
| | - Maxim Itkin
- Life Sciences Core Facilities, Weizmann Institute of Science, Israel
| | - Sergey Malitsky
- Life Sciences Core Facilities, Weizmann Institute of Science, Israel
| | - Alexander Brandis
- Life Sciences Core Facilities, Weizmann Institute of Science, Israel
| | - Naama Barkai
- Department of Molecular Genetics, Weizmann Institute of Science, Israel
| | - Rubén Fernández-Busnadiego
- University Medical Center Göttingen, Institute for Neuropathology, 37077, Germany
- Collaborative Research Center 1190 "Compartmental Gates and Contact Sites in Cells", University of Göttingen, Germany
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, 37077, Germany
- Faculty of Physics, University of Göttingen, 37077, Germany
| | - Amit R Reddi
- School of Chemistry and Biochemistry, Georgia Institute of Technology, USA
| | - Peter Rehling
- Department of Cellular Biochemistry, University Medical Center Göttingen, Germany
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Translational Neuroinflammation and Automated Microscopy, Germany
- Max Planck Institute for Multidisciplinary Sciences, D-37077, Germany
| | - Doron Rapaport
- Interfaculty Institute of Biochemistry, University of Tuebingen, Germany
| | - Maya Schuldiner
- Department of Molecular Genetics, Weizmann Institute of Science, Israel
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Zhou Y, Ding S. Key Determinants of Immune-Mediated Adverse Reactions to Oncology Drugs. Cancers (Basel) 2023; 15:5622. [PMID: 38067327 PMCID: PMC10705334 DOI: 10.3390/cancers15235622] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 11/23/2023] [Accepted: 11/23/2023] [Indexed: 06/16/2024] Open
Abstract
To overcome the epidemiological severity of cancer, developing effective treatments is urgently required. In response, immune checkpoint inhibitors (ICIs) have been revealed as a promising resolution for treatment-resistant cancers across the world. Yet, they have both advantages and disadvantages, bringing therapeutic benefits while simultaneously inducing toxicity, and in particular, immune-mediated adverse drug reactions (imADRs), to the human body. These imADRs can be pathogenic and sometimes lethal, hampering health prediction and monitoring following the provision of ICI treatment. Therefore, it is necessary to collectively identify the determinant factors that contribute to these imADRs induced by ICIs. This article evaluated treatment-, tumor-, and patient-related determinants, and indicated a research gap for future investigations on the pathogenic mechanism of imADRs and translational conversion of determinants into clinical biomarkers to aid pharmacovigilance and cancer therapies.
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Affiliation(s)
- Yihan Zhou
- Medical Sciences Division, Department of Oncology, University of Oxford, Old Road Campus Building, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Shan Ding
- Department of Life Science, Imperial College London, South Kensington Campus, Exhibition Road, London SW7 2AZ, UK;
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3
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Herranz-Jusdado JG, Morel E, Simón R, Díaz-Rosales P, Tafalla C. Teleost IgD +IgM - B cells in gills and skin have a plasmablast profile, but functionally and phenotypically differ from IgM +IgD - B cells in these sites. iScience 2023; 26:107434. [PMID: 37593459 PMCID: PMC10428129 DOI: 10.1016/j.isci.2023.107434] [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: 02/01/2023] [Revised: 06/15/2023] [Accepted: 07/17/2023] [Indexed: 08/19/2023] Open
Abstract
Although most B cells in teleost systemic compartments co-express IgM and IgD on the surface, cells exclusively expressing either of the two Igs are common in fish mucosal tissues, providing us with a unique opportunity to further characterize IgD+IgM- B cells, an intriguing B cell subset. Hence, we compared the phenotype of IgD+IgM- cells to that of IgM+IgD- B cells in rainbow trout gills and skin, also establishing the response of these subsets to immune stimulation. The transcriptional profile and secreting capacity of IgD+IgM- B cells corresponded to that of cells that have started a differentiation program toward plasmablasts, similarly to IgM+IgD- B cells. Yet, IgM+IgD- B cells retained high levels of surface MHC II and antigen-processing abilities, while these were much lower in IgD+IgM- cells, suggesting important differences in their antigen-presenting capacities. Our findings contribute to a deeper understanding of the enigmatic role of IgD in mucosal surfaces.
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Affiliation(s)
- J. Germán Herranz-Jusdado
- Animal Health Research Center (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Consejo Superior de Investigaciones Científicas (CSIC), Valdeolmos 28130 Madrid, Spain
| | - Esther Morel
- Animal Health Research Center (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Consejo Superior de Investigaciones Científicas (CSIC), Valdeolmos 28130 Madrid, Spain
| | - Rocío Simón
- Animal Health Research Center (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Consejo Superior de Investigaciones Científicas (CSIC), Valdeolmos 28130 Madrid, Spain
| | - Patricia Díaz-Rosales
- Animal Health Research Center (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Consejo Superior de Investigaciones Científicas (CSIC), Valdeolmos 28130 Madrid, Spain
| | - Carolina Tafalla
- Animal Health Research Center (CISA), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Consejo Superior de Investigaciones Científicas (CSIC), Valdeolmos 28130 Madrid, Spain
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袁 文, 程 巾, 刘 春, 刘 君, 石 梦, 陆 书, 关 凤. [Distribution of memory B cell subsets in peripheral blood of children with frequently relapsing nephrotic syndrome]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2023; 25:172-178. [PMID: 36854694 PMCID: PMC9979389 DOI: 10.7499/j.issn.1008-8830.2209128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 12/05/2022] [Indexed: 03/02/2023]
Abstract
OBJECTIVES To investigate the change in the distribution of memory B cell subsets in children with frequently relapsing nephrotic syndrome (FRNS) during the course of the disease. METHODS A total of 35 children with primary nephrotic syndrome (PNS) who attended the Department of Pediatrics of the Affiliated Hospital of Xuzhou Medical University from October 2020 to October 2021 were enrolled as subjects in this prospective study. According to the response to glucocorticoid (GC) therapy and frequency of recurrence, the children were divided into two groups: FRNS (n=20) and non-FRNS (NFRNS; n=15). Fifteen children who underwent physical examination were enrolled as the control group. The change in memory B cells after GC therapy was compared between groups, and its correlation with clinical indicators was analyzed. RESULTS Before treatment, the FRNS and NFRNS groups had significantly increased percentages of total B cells, total memory B cells, IgD+ memory B cells, and IgE+ memory B cells compared with the control group, and the FRNS group had significantly greater increases than the NFRNS group (P<0.05); the FRNS group had a significantly lower percentage of class-switched memory B cells than the NFRNS and control groups (P<0.05). After treatment, the FRNS and NFRNS groups had significant reductions in the percentages of total B cells, total memory B cells, IgM+IgD+ memory B cells, IgM+ memory B cells, IgE+ memory B cells, IgD+ memory B cells, and IgG+ memory B cells (P<0.05) and a significant increase in the percentage of class-switched memory B cells (P<0.05). The FRNS group had a significantly higher urinary protein quantification than the NFRNS and control groups (P<0.05) and a significantly lower level of albumin than the control group (P<0.05). In the FRNS group, urinary protein quantification was negatively correlated with the percentage of class-switched memory B cells and was positively correlated with the percentage of IgE+ memory B cells (P<0.05). CONCLUSIONS Abnormal distribution of memory B cell subsets may be observed in children with FRNS, and the percentages of IgE+ memory B cells and class-switched memory B cells can be used as positive and negative correlation factors for predicting recurrence after GC therapy in these children.
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Plum LA, Blaser W, Peter L, Prahl J, Seeman J, DeLuca HF. Antibody production in mice requires neither vitamin D, nor the vitamin D receptor. Front Immunol 2022; 13:960405. [PMID: 36341456 PMCID: PMC9631817 DOI: 10.3389/fimmu.2022.960405] [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] [Received: 06/02/2022] [Accepted: 08/30/2022] [Indexed: 11/16/2022] Open
Abstract
The vitamin D receptor as well as its ligand have been localized to various immune tissues and cells. These observations have led researchers to hypothesize a role for vitamin D in the immune system. However, a specific role for vitamin D in immunity has yet to be clearly delineated. The work in this report was undertaken to determine if mounting an antibody response is altered in the face of vitamin D-deficiency or when the signaling pathway is eliminated by removal of the nuclear receptor. This investigation provides direct evidence vitamin D is not necessary for producing antibodies, a process paramount for optimal attack against many foreign organisms. The idea that vitamin D plays a significant role in immunity has been proposed repeatedly for many years. To address this important idea we have carried out studies in mice to determine if vitamin D plays a significant role in antibody production. Two animal models were utilized: mice depleted of vitamin D and mice devoid of the vitamin D receptor. Further, a possible role of hypocalcemia resulting from vitamin D deficiency in antibody production was determined. Neither the absence of vitamin D or the vitamin D receptor nor hypocalcemia affected the ability of mice to mount an antibody response to an antigen challenge. Thus, we found no evidence that vitamin D or normal serum calcium is required for this major form of immunity.
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Affiliation(s)
- Lori A. Plum
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, United States
| | - William Blaser
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, United States
| | - Logan Peter
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, United States
| | - Jean Prahl
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, United States
| | - Jeremy Seeman
- Organic Lab, DiaSorin Inc., Stillwater, MN, United States
| | - Hector F. DeLuca
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, United States
- *Correspondence: Hector F. DeLuca,
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6
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Zegallai HM, Abu-El-Rub E, Olayinka-Adefemi F, Cole LK, Sparagna GC, Marshall AJ, Hatch GM. Tafazzin deficiency in mouse mesenchymal stem cells promote reprogramming of activated B lymphocytes toward immunosuppressive phenotypes. FASEB J 2022; 36:e22443. [PMID: 35816277 DOI: 10.1096/fj.202200145r] [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: 01/25/2022] [Revised: 05/20/2022] [Accepted: 06/27/2022] [Indexed: 11/11/2022]
Abstract
Barth Syndrome (BTHS) is a rare X-linked genetic disorder caused by mutation in the TAFAZZIN gene. Tafazzin (Taz) deficiency in BTHS patients results in an increased risk of infections. Mesenchymal stem cells (MSCs) are well known for their immune-inhibitory function. We examined how Taz-deficiency in murine MSCs impact their ability to modulate the function of lipopolysaccharide (LPS)-activated wild type (WT) B lymphocytes. MSCs from tafazzin knockdown (TazKD) mice exhibited a reduction in mitochondrial cardiolipin compared to wild type (WT) MSCs. However, mitochondrial bioenergetics and membrane potential were unaltered. In contrast, TazKD MSCs exhibited increased reactive oxygen species generation and increased glycolysis. The increased glycolysis was associated with an elevated proliferation, phosphatidylinositol-3-kinase expression and expression of the immunosuppressive markers indoleamine-2,3-dioxygenase, cytotoxic T-lymphocyte-associated protein 4, interleukin-10, and cluster of differentiation 59 compared to controls. Inhibition of glycolysis with 2-deoxyglucose attenuated the TazKD-mediated increased expression of cytotoxic T-lymphocyte-associated protein 4 and interleukin-10. When co-cultured with LPS-activated WT B cells, TazKD MSCs inhibited B cell proliferation and growth rate and reduced B cell secretion of immunoglobulin M compared to controls. In addition, co-culture of LPS-activated WT B cells with TazKD MSCs promoted B cell differentiation toward interleukin-10 secreting plasma cells and B regulatory cells compared to controls. The results indicate that Taz deficiency in MSCs promote reprogramming of activated B lymphocytes toward immunosuppressive phenotypes.
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Affiliation(s)
- Hana M Zegallai
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM) Theme, Children's Hospital Research Institute of Manitoba, Department of Pharmacology & Therapeutics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Ejlal Abu-El-Rub
- Physiology and Pathophysiology, Department of Basic Medical Sciences, Faculty of Medicine, Yarmouk University, Irbid, Jordan.,Physiology and Pathophysiology, Regenerative Medicine, Faculty of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Folayemi Olayinka-Adefemi
- Department of Immunology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Laura K Cole
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM) Theme, Children's Hospital Research Institute of Manitoba, Department of Pharmacology & Therapeutics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Genevieve C Sparagna
- Department of Medicine, Division of Cardiology, University of Colorado Anschutz Medical Center, Aurora, Colorado, USA
| | - Aaron J Marshall
- Department of Immunology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Grant M Hatch
- Diabetes Research Envisioned and Accomplished in Manitoba (DREAM) Theme, Children's Hospital Research Institute of Manitoba, Department of Pharmacology & Therapeutics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
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OGIHARA K, NAYA Y, KAMIE J, HISAMATSU S, KODAMA M, ISHIKAWA Y, KADOTA K. A porcine lymphoma-derived cell line co-expressing IgM, IgG and IgA. J Vet Med Sci 2022; 84:760-765. [PMID: 35400671 PMCID: PMC9246694 DOI: 10.1292/jvms.21-0508] [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] [Indexed: 11/22/2022] Open
Abstract
A cell line (PL38PB) was established from blood samples of a 6-month-old pig that was
diagnosed with lymphoma with CD5 expression. Histopathological examination revealed
neoplastic lesions in the spleen, liver and lymph nodes. Tumor cells were
immunohistochemically positive for CD20 and immunoglobulin heavy chains (μ, γ and α).
Membranous CD5 and cytoplasmic Immunoglobulin M (IgM), Immunoglobulin G (IgG) and
Immunoglobulin A (IgA) were detected in PL38PB cells by flow cytometry. In addition, the
cytoplasm of PL38PB cells were positive for IgM, IgG and IgA by immunofluorescent.
However, no Ig secretion was detected in culture supernatant by Ouchterlony gel diffusion
method. Results suggest that PL38PB cells express three Ig isotypes that are produced but
not secreted.
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Affiliation(s)
- Kikumi OGIHARA
- Laboratory of Pathology, School of Life and Environmental Science, Azabu University
| | - Yuko NAYA
- Laboratory of Pathology, School of Life and Environmental Science, Azabu University
| | - Junichi KAMIE
- Laboratory of Veteinary Pathology, School of Veterinary Medicine, Azabu University
| | - Shin HISAMATSU
- Laboratory of Environmental Analysis, School of Life and Environmental Science, Azabu University
| | - Michi KODAMA
- Hokkaido Research Station, National Institute of Animal Health
| | | | - Koichi KADOTA
- Hokkaido Research Station, National Institute of Animal Health
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8
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Zegallai HM, Abu-El-Rub E, Olayinka-Adefemi F, Cole LK, Sparagna GC, Marshall AJ, Hatch GM. Tafazzin deficiency in mouse mesenchymal stem cells potentiates their immunosuppression and impairs activated B lymphocyte immune function. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2021. [PMID: 34729562 DOI: 10.1101/2021.09.07.459330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Barth Syndrome (BTHS) is a rare X-linked genetic disorder caused by mutation in the TAFAZZIN gene which encodes the cardiolipin (CL) transacylase tafazzin (Taz). Taz deficiency in BTHS patients results in reduced CL in their tissues and a neutropenia which contributes to the risk of infections. However, the impact of Taz deficiency in other cells of the immune system is poorly understood. Mesenchymal stem cells (MSCs) are well known for their immune inhibitory function. We examined whether Taz-deficiency in murine MSCs impacted their ability to modulate lipopolysaccharide (LPS)-activated wild type (WT) murine B lymphocytes. MSCs from tafazzin knockdown (TazKD) mice exhibited a 50% reduction in CL compared to wild type (WT) MSCs. However, mitochondrial oxygen consumption rate and membrane potential were unaltered. In contrast, TazKD MSCs exhibited increased glycolysis compared to WT MSCs and this was associated with elevated proliferation, phosphatidylinositol-3-kinase expression and expression of the immunosuppressive markers indoleamine-2,3-dioxygenase, cytotoxic T-lymphocyte-associated protein 4, interleukin-10, and cluster of differentiation 59. When co-cultured with LPS-activated WT B cells, TazKD MSCs inhibited B cell proliferation and growth rate and reduced B cell secretion of IgM to a greater extent than B cells co-cultured with WT MSCs. In addition, co-culture of LPS-activated WT B cells with TazKD MSCs induced B cell differentiation toward potent immunosuppressive phenotypes including interleukin-10 secreting plasma cells and B regulatory cells compared to activated B cells co-cultured with WT MSCs. These results indicate that Taz deficiency in MSCs enhances MSCs-mediated immunosuppression of activated B lymphocytes.
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Barlier C, Barriales D, Samosyuk A, Jung S, Ravichandran S, Medvedeva YA, Anguita J, Del Sol A. A Catalogus Immune Muris of the mouse immune responses to diverse pathogens. Cell Death Dis 2021; 12:798. [PMID: 34404761 PMCID: PMC8370971 DOI: 10.1038/s41419-021-04075-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 05/18/2021] [Accepted: 05/19/2021] [Indexed: 11/09/2022]
Abstract
Immunomodulation strategies are crucial for several biomedical applications. However, the immune system is highly heterogeneous and its functional responses to infections remains elusive. Indeed, the characterization of immune response particularities to different pathogens is needed to identify immunomodulatory candidates. To address this issue, we compiled a comprehensive map of functional immune cell states of mouse in response to 12 pathogens. To create this atlas, we developed a single-cell-based computational method that partitions heterogeneous cell types into functionally distinct states and simultaneously identifies modules of functionally relevant genes characterizing them. We identified 295 functional states using 114 datasets of six immune cell types, creating a Catalogus Immune Muris. As a result, we found common as well as pathogen-specific functional states and experimentally characterized the function of an unknown macrophage cell state that modulates the response to Salmonella Typhimurium infection. Thus, we expect our Catalogus Immune Muris to be an important resource for studies aiming at discovering new immunomodulatory candidates.
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Affiliation(s)
- Céline Barlier
- Computational Biology Group, Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Esch-sur-Alzette, Luxembourg
| | - Diego Barriales
- Inflammation and Macrophage Plasticity laboratory, CIC bioGUNE-BRTA (Basque Research and Technology Alliance), Derio, 48160, Spain
| | - Alexey Samosyuk
- Department of Biological and Medical Physics, Moscow Institute of Physics and Technology, Dolgoprudny, Russian Federation
| | - Sascha Jung
- Computational Biology Group, CIC bioGUNE-BRTA (Basque Research and Technology Alliance), Derio, 48160, Spain
| | - Srikanth Ravichandran
- Computational Biology Group, Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Esch-sur-Alzette, Luxembourg
| | - Yulia A Medvedeva
- Department of Biological and Medical Physics, Moscow Institute of Physics and Technology, Dolgoprudny, Russian Federation
- Institute of Bioengineering, Research Center of Biotechnology, Russian Academy of Science, Moscow, Russian Federation
- Department of Computational Biology, Vavilov Institute of General Genetics, Russian Academy of Science, Moscow, Russian Federation
| | - Juan Anguita
- Inflammation and Macrophage Plasticity laboratory, CIC bioGUNE-BRTA (Basque Research and Technology Alliance), Derio, 48160, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao, Bizkaia, 48012, Spain
| | - Antonio Del Sol
- Computational Biology Group, Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Esch-sur-Alzette, Luxembourg.
- Computational Biology Group, CIC bioGUNE-BRTA (Basque Research and Technology Alliance), Derio, 48160, Spain.
- Ikerbasque, Basque Foundation for Science, Bilbao, Bizkaia, 48012, Spain.
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10
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Amendt T, Ayoubi OE, Linder AT, Allies G, Young M, Setz CS, Jumaa H. Primary Immune Responses and Affinity Maturation Are Controlled by IgD. Front Immunol 2021; 12:709240. [PMID: 34434193 PMCID: PMC8381280 DOI: 10.3389/fimmu.2021.709240] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/15/2021] [Indexed: 01/17/2023] Open
Abstract
Mature B cells co-express IgM and IgD B cell antigen receptors (BCR) on their surface. While IgM BCR expression is already essential at early stages of development, the role of the IgD-class BCR remains unclear as most B cell functions appeared unchanged in IgD-deficient mice. Here, we show that IgD-deficient mice have an accelerated rate of B cell responsiveness as they activate antibody production within 24h after immunization, whereas wildtype (WT) animals required 3 days to activate primary antibody responses. Strikingly, soluble monovalent antigen suppresses IgG antibody production induced by multivalent antigen in WT mice. In contrast, IgD-deficient mice were not able to modulate IgG responses suggesting that IgD controls the activation rate of B cells and subsequent antibody production by sensing and distinguishing antigen-valences. Using an insulin-derived peptide we tested the role of IgD in autoimmunity. We show that primary autoreactive antibody responses are generated in WT and in IgD-deficient mice. However, insulin-specific autoantibodies were detected earlier and caused more severe symptoms of autoimmune diabetes in IgD-deficient mice as compared to WT mice. The rapid control of autoimmune diabetes in WT animals was associated with the generation of high-affinity IgM that protects insulin from autoimmune degradation. In IgD-deficient mice, however, the generation of high-affinity protective IgM is delayed resulting in prolonged autoimmune diabetes. Our data suggest that IgD is required for the transition from primary, highly autoreactive, to secondary antigen-specific antibody responses generated by affinity maturation.
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Affiliation(s)
| | | | | | | | | | | | - Hassan Jumaa
- Institute of Immunology, Ulm University Medical Center, Ulm, Germany
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11
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Li Y, Li Z, Hu F. Double-negative (DN) B cells: an under-recognized effector memory B cell subset in autoimmunity. Clin Exp Immunol 2021; 205:119-127. [PMID: 33969476 DOI: 10.1111/cei.13615] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 12/12/2022] Open
Abstract
Human B cells could be divided into four classical subsets based on CD27 and immunoglobulin (Ig)D expression. Distinct from the other three well-studied subsets, CD27- IgD- B cells, also termed as double-negative (DN) B cells, have long been neglected. However, in recent years emerging evidence shows that DN B cells are unique memory B cells with important functions. They are expanded in a variety of diseases, especially in autoimmune diseases, contributing to the disease pathogenesis. Here, we briefly review the studies on DN B cells, including their origins, characteristics, subsets and roles in diseases, to try to bring new insights into this under-recognized B cell subset.
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Affiliation(s)
- Yuzi Li
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Beijing, China
| | - Zhanguo Li
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Beijing, China.,State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China.,Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Fanlei Hu
- Department of Rheumatology and Immunology, Peking University People's Hospital & Beijing Key Laboratory for Rheumatism Mechanism and Immune Diagnosis, Beijing, China.,State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, China
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12
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Perdiguero P, Morel E, Díaz-Rosales P, Tafalla C. Individual B cells transcribe multiple rearranged immunoglobulin light chains in teleost fish. iScience 2021; 24:102615. [PMID: 34142062 PMCID: PMC8188548 DOI: 10.1016/j.isci.2021.102615] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 04/14/2021] [Accepted: 05/19/2021] [Indexed: 11/01/2022] Open
Abstract
B cells express a unique antibody protein which comprises two pairs of immunoglobulin (Ig) heavy (H) and light (L) chains. In addition to an invariable constant (C) region, IgH and IgL chains encompass a variable (V) region mediating antigen binding. This unique region stems from Ig V(D)J gene recombination, which generates diversity by assembling these gene segments into VHDJH and VLJL genes. To ensure that one B cell only expresses one antibody, VHDJH rearrangement occurs only in one IgH locus (allelic exclusion), whereas VLJL rearrangement only in either the κ or λ locus (isotype exclusion). However, teleosts express multiple IgLs encoded by distinct CL genes. Using single-cell transcriptomics, we have demonstrated the transcription of distinct rearranged VLJLCL genes in single rainbow trout B cells. Our results highlight the laxity of isotype exclusion in teleosts and strongly suggest that fish B cells can produce antibodies of different specificities.
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Affiliation(s)
- Pedro Perdiguero
- Animal Health Research Center (CISA-INIA), Valdeolmos, Madrid 28130, Spain
| | - Esther Morel
- Animal Health Research Center (CISA-INIA), Valdeolmos, Madrid 28130, Spain
| | | | - Carolina Tafalla
- Animal Health Research Center (CISA-INIA), Valdeolmos, Madrid 28130, Spain
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13
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Akbari Fard L, Zehsaz F, Farhangi N. Concurrent exercise training effect on salivary immunoglobulin A and alpha-amylase in children with cerebral palsy. GERMAN JOURNAL OF EXERCISE AND SPORT RESEARCH 2021. [DOI: 10.1007/s12662-020-00696-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Nguyen TG. The therapeutic implications of activated immune responses via the enigmatic immunoglobulin D. Int Rev Immunol 2021; 41:107-122. [PMID: 33410368 DOI: 10.1080/08830185.2020.1861265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Immunoglobulin D (IgD) is an enigmatic antibody and the least appreciated member of the immunoglobulin (Ig) family. Since its discovery over half a century ago, the essence of its function in the immune system has been somewhat enigmatic and less well-defined than other antibody classes. Membrane-bound IgD (mIgD) is mostly recognized as B-cell receptor (BCR) while secreted IgD (sIgD) has been recently implicated in 'arming' basophils and mast cells in mucosal innate immunity. Activations of immune responses via mIgD-BCR or sIgD by specific antigens or anti-IgD antibody thereby produce a broad and complex mix of cellular, antibody and cytokine responses from both the innate and adaptive immune systems. Such broadly activated immune responses via IgD were initially deemed to potentiate and exacerbate the onset of autoimmune and allergic conditions. Paradoxically, treatments with anti-IgD antibody suppressed and ameliorated autoimmune conditions and allergic inflammations in mouse models without compromising the host's general immune defence, demonstrating a unique and novel therapeutic application for anti-IgD antibody treatment. Herein, this review endeavored to collate and summarize the evidence of the unique characteristics and features of activated immune responses via mIgD-BCR and sIgD that revealed an unappreciated immune-regulatory function of IgD in the immune system via an amplifying loop of anti-inflammatory Th2 and tolerogenic responses, and highlighted a novel therapeutic paradigm in harnessing these immune responses to treat human autoimmune and allergic conditions.
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15
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Espinosa-Gómez FC, Ruíz-May E, Serio-Silva JC, Chapman CA. Salivary proteome of a Neotropical primate: potential roles in host defense and oral food perception. PeerJ 2020; 8:e9489. [PMID: 32765966 PMCID: PMC7382365 DOI: 10.7717/peerj.9489] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 06/15/2020] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Saliva contains a very complex mixture of proteins for defense against microbiological pathogens and for oral food perception. Howler monkeys are Neotropical primates that can consume a mostly leaf diet. They are well known to thrive in highly disturbed habitats where they may cope with a diversity of dietary challenges and infection risks. We aimed to describe the salivary proteome of howlers to contribute to better understanding of their physiology. METHODS We analyzed the salivary proteins of wild black howler monkeys (Alouatta pigra), by SDS-PAGE-1-D and Nano LC-MS/MS and categorized them by their function involved in host defense and oral food perception. RESULTS Our proteomic analysis identified 156 proteins in howler saliva including a number of host defense peptides that are the first line of defense in mammals, such as defensin, cathelicidin, dermcidin, and lactotransferrin, and proteins with anti-bacterial, anti-fungal, and anti-viral capacity, such as IgA, IgG, IgM, BPI, salivary heat shock 70 kDa protein, beta-2-microbulin, and protein S-100. We also identified key proteins necessary for taste perception, including salivary carbonic anhydrase VI, cystatin D, IgA, and fatty acid-binding protein. Proteins to detect astringent foods were identifying, including four members of cystatins (A, B, C and D), lactoperoxidase, and histidine-rich proteins. No chitinase and amylase were identified as would be expected because howlers do not eat insects and little starch. These findings provide basic information to future studies in oral biology, ingestive physiology, and physiological ecology of mammals and non-human primates.
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Affiliation(s)
- Fabiola Carolina Espinosa-Gómez
- Department of Anthropology and McGill School of Environment, McGill University, Montreal, Quebec, Canada
- Red de Biología y Conservación de Vertebrados, Instituto de Ecología AC, Xalapa, Veracruz, México
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Popular Autónoma del Estado de Puebla, Puebla, Puebla, México
| | - Eliel Ruíz-May
- Red de Estudios Moleculares Avanzados, Instituto de Ecología AC, Xalapa, Veracruz, México
| | - Juan Carlos Serio-Silva
- Red de Biología y Conservación de Vertebrados, Instituto de Ecología AC, Xalapa, Veracruz, México
| | - Colin A. Chapman
- Department of Anthropology and McGill School of Environment, McGill University, Montreal, Quebec, Canada
- Department of Anthropology, Center for the Advanced Study of Human Paleobiology, George Washington University, Washington DC, Washington DC, United States of America
- School of Life Sciences, University of KwaZulu-Natal, Scottsville, Pietermaritzburg, South Africa
- Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi’an, Xi’an, China
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16
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Waters LR, Ahsan FM, Ten Hoeve J, Hong JS, Kim DNH, Minasyan A, Braas D, Graeber TG, Zangle TA, Teitell MA. Ampk regulates IgD expression but not energy stress with B cell activation. Sci Rep 2019; 9:8176. [PMID: 31160601 PMCID: PMC6546716 DOI: 10.1038/s41598-019-43985-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 04/28/2019] [Indexed: 12/25/2022] Open
Abstract
Ampk is an energy gatekeeper that responds to decreases in ATP by inhibiting energy-consuming anabolic processes and promoting energy-generating catabolic processes. Recently, we showed that Lkb1, an understudied kinase in B lymphocytes and a major upstream kinase for Ampk, had critical and unexpected roles in activating naïve B cells and in germinal center formation. Therefore, we examined whether Lkb1 activities during B cell activation depend on Ampk and report surprising Ampk activation with in vitro B cell stimulation in the absence of energy stress, coupled to rapid biomass accumulation. Despite Ampk activation and a controlling role for Lkb1 in B cell activation, Ampk knockout did not significantly affect B cell activation, differentiation, nutrient dynamics, gene expression, or humoral immune responses. Instead, Ampk loss specifically repressed the transcriptional expression of IgD and its regulator, Zfp318. Results also reveal that early activation of Ampk by phenformin treatment impairs germinal center formation but does not significantly alter antibody responses. Combined, the data show an unexpectedly specific role for Ampk in the regulation of IgD expression during B cell activation.
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Affiliation(s)
- Lynnea R Waters
- Molecular Biology Interdepartmental Program, UCLA, Los Angeles, CA, 90095, USA
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, 90095, USA
| | - Fasih M Ahsan
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, 90095, USA
| | - Johanna Ten Hoeve
- Department of Molecular and Medical Pharmacology, UCLA, Los Angeles, CA, 90095, USA
- UCLA Metabolomics Center, UCLA, Los Angeles, CA, 90095, USA
- Crump Institute for Molecular Imaging, UCLA, Los Angeles, CA, 90095, USA
| | - Jason S Hong
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, 90095, USA
| | - Diane N H Kim
- Department of Bioengineering, UCLA, Los Angeles, CA, 90095, USA
| | - Aspram Minasyan
- Department of Molecular and Medical Pharmacology, UCLA, Los Angeles, CA, 90095, USA
- Crump Institute for Molecular Imaging, UCLA, Los Angeles, CA, 90095, USA
| | - Daniel Braas
- Department of Molecular and Medical Pharmacology, UCLA, Los Angeles, CA, 90095, USA
- UCLA Metabolomics Center, UCLA, Los Angeles, CA, 90095, USA
- Crump Institute for Molecular Imaging, UCLA, Los Angeles, CA, 90095, USA
| | - Thomas G Graeber
- Department of Molecular and Medical Pharmacology, UCLA, Los Angeles, CA, 90095, USA
- UCLA Metabolomics Center, UCLA, Los Angeles, CA, 90095, USA
- Crump Institute for Molecular Imaging, UCLA, Los Angeles, CA, 90095, USA
- Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA, 90095, USA
- California NanoSystems Institute, UCLA, Los Angeles, CA, 90095, USA
- Broad Stem Cell Research Center, UCLA, Los Angeles, CA, 90095, USA
| | - Thomas A Zangle
- Department of Chemical Engineering, University of Utah, Salt Lake City, UT, 84112, USA
- Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, 84112, USA
| | - Michael A Teitell
- Molecular Biology Interdepartmental Program, UCLA, Los Angeles, CA, 90095, USA.
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, 90095, USA.
- Department of Bioengineering, UCLA, Los Angeles, CA, 90095, USA.
- Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA, 90095, USA.
- California NanoSystems Institute, UCLA, Los Angeles, CA, 90095, USA.
- Broad Stem Cell Research Center, UCLA, Los Angeles, CA, 90095, USA.
- Department of Pediatrics, UCLA, Los Angeles, CA, 90095, USA.
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17
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Peñaranda MMD, Jensen I, Tollersrud LG, Bruun JA, Jørgensen JB. Profiling the Atlantic Salmon IgM + B Cell Surface Proteome: Novel Information on Teleost Fish B Cell Protein Repertoire and Identification of Potential B Cell Markers. Front Immunol 2019; 10:37. [PMID: 30761128 PMCID: PMC6362898 DOI: 10.3389/fimmu.2019.00037] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 01/08/2019] [Indexed: 01/04/2023] Open
Abstract
Fish immunology research is at a pivotal point with the increasing availability of functional immunoassays and major advances in omics approaches. However, studies on fish B cells and their distinct subsets remain a challenge due to the limited availability of differentially expressed surface markers. To address this constraint, cell surface proteome of Atlantic salmon IgM+ B cells were analyzed by mass spectrometry and compared to surface proteins detected from two adherent salmon head kidney cell lines, ASK and SSP-9. Out of 21 cluster of differentiation (CD) molecules identified on salmon IgM+ B cells, CD22 and CD79A were shortlisted as potential markers based on the reported B cell-specific surface expression of their mammalian homologs. Subsequent RT-qPCR analyses of flow cytometry-sorted subpopulations from head kidney leukocytes confirmed that both cd22 and cd79a genes were highly expressed in IgM+ lymphoid cells but were observed in barely detectable levels in IgM- non-lymphoid suspension and adherent cells. Similarly, significantly high cd22 and cd79a mRNA levels were observed in IgM+ or IgT+ lymphoid cells from the spleen and peritoneal cavity, but not in their corresponding IgM- IgT- non-lymphoid fractions. This suggests that the B cell restrictive expression of CD22 and CD79A extend down to the transcription level, which was consistent across different lymphoid compartments and immunoglobulin isotypes, thus strongly supporting the potential of CD22 and CD79A as pan-B cell markers for salmon. In addition, this study provides novel information on the salmon B cell surface protein repertoire, as well as insights on B cell evolution. Further investigation of the identified salmon CD molecules, including development of immunological tools for detection, will help advance our understanding of the dynamics of salmon B cell responses such as during infection, vaccination, or immunostimulation.
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Affiliation(s)
- Ma Michelle D Peñaranda
- The Norwegian College of Fishery Science, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
| | - Ingvill Jensen
- The Norwegian College of Fishery Science, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
| | - Linn G Tollersrud
- The Norwegian College of Fishery Science, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
| | - Jack-Ansgar Bruun
- Tromsø University Proteomics Platform, Institute of Medical Biology, UiT The Arctic University of Norway, Tromsø, Norway
| | - Jorunn B Jørgensen
- The Norwegian College of Fishery Science, Faculty of Biosciences, Fisheries and Economics, UiT The Arctic University of Norway, Tromsø, Norway
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18
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Mature IgD low/- B cells maintain tolerance by promoting regulatory T cell homeostasis. Nat Commun 2019; 10:190. [PMID: 30643147 PMCID: PMC6331566 DOI: 10.1038/s41467-018-08122-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 12/19/2018] [Indexed: 12/31/2022] Open
Abstract
A number of different B cell subsets have been shown to exhibit regulatory activity using a variety of mechanisms to attenuate inflammatory diseases. Here we show, using anti-CD20-mediated partial B cell depletion in mice, that a population of mature B cells distinguishable by IgDlow/- expression maintains tolerance by, at least in part, promoting CD4+Foxp3+ regulatory T cell homeostatic expansion via glucocorticoid-induced tumor necrosis factor receptor ligand, or GITRL. Cell surface phenotyping, transcriptome analysis and developmental study data show that B cells expressing IgD at a low level (BDL) are a novel population of mature B cells that emerge in the spleen from the transitional-2 stage paralleling the differentiation of follicular B cells. The cell surface phenotype and regulatory function of BDL are highly suggestive that they are a new B cell subset. Human splenic and peripheral blood IgDlow/- B cells also exhibit BDL regulatory activity, rendering them of therapeutic interest.
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19
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Maity PC, Datta M, Nicolò A, Jumaa H. Isotype Specific Assembly of B Cell Antigen Receptors and Synergism With Chemokine Receptor CXCR4. Front Immunol 2019. [PMID: 30619343 DOI: 10.3389/fimmu.2018.02988.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Expression of the membrane-bound form of the immunoglobulin (Ig) as part of the antigen receptor is indispensable for both the development and the effector function of B cells. Among five known isotypes, IgM and IgD are the common B cell antigen receptors (BCRs) that are co-expressed in naïve B cells. Despite having identical antigen specificity and being associated with the same signaling heterodimer Igα/Igβ (CD79a/CD79b), IgM and IgD-BCR isotypes functionally differ from each other in the manner of antigen binding, the formation of isolated nanoclusters and in their interaction with co-receptors such as CD19 and CXCR4 on the plasma membrane. With recent developments in experimental techniques, it is now possible to investigate the nanoscale organization of the BCR and better understand early events of BCR engagement. Interestingly, the cytoskeleton network beneath the membrane controls the BCR isotype-specific organization and its interaction with co-receptors. BCR triggering results in reorganization of the cytoskeleton network, which is further modulated by isotype-specific signals from co-receptors. For instance, IgD-BCR is closely associated with CXCR4 on mature B cells and this close proximity allows CXCR4 to employ the BCR machinery as signaling hub. In this review, we discuss the functional specificity and nanocluster assembly of BCR isotypes and the consequences of cross-talk between CXCR4 and IgD-BCR. Furthermore, given the role of BCR and CXCR4 signaling in the development and survival of leukemic B cells, we discuss the consequences of the cross-talk between CXCR4 and the BCR for controlling the growth of transformed B cells.
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Affiliation(s)
| | - Moumita Datta
- Institute of Immunology, Ulm University, Ulm, Germany
| | | | - Hassan Jumaa
- Institute of Immunology, Ulm University, Ulm, Germany
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20
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Maity PC, Datta M, Nicolò A, Jumaa H. Isotype Specific Assembly of B Cell Antigen Receptors and Synergism With Chemokine Receptor CXCR4. Front Immunol 2019; 9:2988. [PMID: 30619343 PMCID: PMC6305424 DOI: 10.3389/fimmu.2018.02988] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 12/04/2018] [Indexed: 12/20/2022] Open
Abstract
Expression of the membrane-bound form of the immunoglobulin (Ig) as part of the antigen receptor is indispensable for both the development and the effector function of B cells. Among five known isotypes, IgM and IgD are the common B cell antigen receptors (BCRs) that are co-expressed in naïve B cells. Despite having identical antigen specificity and being associated with the same signaling heterodimer Igα/Igβ (CD79a/CD79b), IgM and IgD-BCR isotypes functionally differ from each other in the manner of antigen binding, the formation of isolated nanoclusters and in their interaction with co-receptors such as CD19 and CXCR4 on the plasma membrane. With recent developments in experimental techniques, it is now possible to investigate the nanoscale organization of the BCR and better understand early events of BCR engagement. Interestingly, the cytoskeleton network beneath the membrane controls the BCR isotype-specific organization and its interaction with co-receptors. BCR triggering results in reorganization of the cytoskeleton network, which is further modulated by isotype-specific signals from co-receptors. For instance, IgD-BCR is closely associated with CXCR4 on mature B cells and this close proximity allows CXCR4 to employ the BCR machinery as signaling hub. In this review, we discuss the functional specificity and nanocluster assembly of BCR isotypes and the consequences of cross-talk between CXCR4 and IgD-BCR. Furthermore, given the role of BCR and CXCR4 signaling in the development and survival of leukemic B cells, we discuss the consequences of the cross-talk between CXCR4 and the BCR for controlling the growth of transformed B cells.
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Affiliation(s)
| | - Moumita Datta
- Institute of Immunology, Ulm University, Ulm, Germany
| | | | - Hassan Jumaa
- Institute of Immunology, Ulm University, Ulm, Germany
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21
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Batool S, Argyropoulos KV, Azad R, Okeoma P, Zumrut H, Bhandari S, Dekhang R, Mallikaratchy PR. Dimerization of an aptamer generated from Ligand-guided selection (LIGS) yields a high affinity scaffold against B-cells. Biochim Biophys Acta Gen Subj 2018; 1863:232-240. [PMID: 30342154 DOI: 10.1016/j.bbagen.2018.10.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/13/2018] [Accepted: 10/04/2018] [Indexed: 12/18/2022]
Abstract
Nucleic Acid Aptamers (NAAs) are a class of synthetic DNA or RNA molecules that bind specifically to their target. We recently introduced an aptamer termed R1.2 against membrane Immunoglobulin M (mIgM) expressing B-cell neoplasms using Ligand Guided Selection (LIGS). While LIGS-generated aptamers are highly specific, their lower affinity prevents aptamers from being used for translational applications. Highly specific aptamers with higher affinity can increase targetability, boosting the application of aptamers as diagnostic and therapeutic molecules. Herein, we report that dimerization of R1.2, an aptamer generated from LIGS, leads to high affinity variants without compromising the specificity. Three dimeric aptamer analogues with variable linker lengths were designed to evaluate the effect of linker length in affinity. The optimized dimeric R1.2 against cultured B-cell neoplasms, four donor B-cell samples and mIgM-positive Waldenström's Macroglobulinemia (WM) showed specificity. Furthermore, confocal imaging of dimeric aptamer and anti-IgM antibody in purified B-cells suggests co-localization. Binding assays against IgM knockout Burkitt's Lymphoma cells utilizing CRISPR/Cas9 further validated specificity of dimeric R1.2. Collectively, our findings show that LIGS-generated aptamers can be re-engineered into dimeric aptamers with high specificity and affinity, demonstrating wide-range of applicability of LIGS in developing clinically practical diagnostic and therapeutic aptamers.
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Affiliation(s)
- Sana Batool
- Department of Chemistry, Lehman College, The City University of New York, 250 Bedford Park Blvd, NY 10468, USA
| | - Kimon V Argyropoulos
- Immunology Program, Memorial Sloan Kettering Cancer Center, 408 E69th street, New York, NY, 10021, USA
| | - Roksana Azad
- Ph.D. Program in Chemistry and Biochemistry, CUNY Graduate Center, 365 Fifth Avenue, New York, NY 10016, USA
| | - Precious Okeoma
- Department of Chemistry, Lehman College, The City University of New York, 250 Bedford Park Blvd, NY 10468, USA
| | - Hasan Zumrut
- Ph.D. Program in Chemistry and Biochemistry, CUNY Graduate Center, 365 Fifth Avenue, New York, NY 10016, USA
| | - Sanam Bhandari
- Department of Chemistry, Lehman College, The City University of New York, 250 Bedford Park Blvd, NY 10468, USA
| | - Rigzin Dekhang
- Department of Chemistry, Lehman College, The City University of New York, 250 Bedford Park Blvd, NY 10468, USA
| | - Prabodhika R Mallikaratchy
- Department of Chemistry, Lehman College, The City University of New York, 250 Bedford Park Blvd, NY 10468, USA; Ph.D. Program in Chemistry and Biochemistry, CUNY Graduate Center, 365 Fifth Avenue, New York, NY 10016, USA; Ph.D. Program in Molecular, Cellular and Developmental Biology, CUNY Graduate Center, 365 Fifth Avenue, New York, NY 10016, USA.
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22
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Nechvatalova J, Bartol SJW, Chovancova Z, Boon L, Vlkova M, van Zelm MC. Absence of Surface IgD Does Not Impair Naive B Cell Homeostasis or Memory B Cell Formation in IGHD Haploinsufficient Humans. THE JOURNAL OF IMMUNOLOGY 2018; 201:1928-1935. [DOI: 10.4049/jimmunol.1800767] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 07/25/2018] [Indexed: 12/31/2022]
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23
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Bashford-Rogers RJM, Smith KGC, Thomas DC. Antibody repertoire analysis in polygenic autoimmune diseases. Immunology 2018; 155:3-17. [PMID: 29574826 PMCID: PMC6099162 DOI: 10.1111/imm.12927] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/01/2018] [Accepted: 03/06/2018] [Indexed: 12/18/2022] Open
Abstract
High-throughput sequencing of the DNA/RNA encoding antibody heavy- and light-chains is rapidly transforming the field of adaptive immunity. It can address key questions, including: (i) how the B-cell repertoire differs in health and disease; and (ii) if it does differ, the point(s) in B-cell development at which this occurs. The advent of technologies, such as whole-genome sequencing, offers the chance to link abnormalities in the B-cell antibody repertoire to specific genomic variants and polymorphisms. Here, we discuss the current research using B-cell antibody repertoire sequencing in three polygenic autoimmune diseases where there is good evidence for a pathological role for B-cells, namely systemic lupus erythematosus, multiple sclerosis and rheumatoid arthritis. These autoimmune diseases exhibit significantly skewed B-cell receptor repertoires compared with healthy controls. Interestingly, some common repertoire defects are shared between diseases, such as elevated IGHV4-34 gene usage. B-cell clones have effectively been characterized and tracked between different tissues and blood in autoimmune disease. It has been hypothesized that these differences may signify differences in B-cell tolerance; however, the mechanisms and implications of these defects are not clear.
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Affiliation(s)
| | | | - David C Thomas
- Department of Medicine, University of Cambridge, Cambridge, UK
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24
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Reddy KE, Song J, Lee HJ, Kim M, Kim DW, Jung HJ, Kim B, Lee Y, Yu D, Kim DW, Oh YK, Lee SD. Effects of High Levels of Deoxynivalenol and Zearalenone on Growth Performance, and Hematological and Immunological Parameters in Pigs. Toxins (Basel) 2018. [PMID: 29518941 PMCID: PMC5869402 DOI: 10.3390/toxins10030114] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background: Deoxynivalenol (DON) and zearalenone (ZEN) are common food contaminants produced by Fusarium sp. Mycotoxins are a potential health hazard because of their toxicological effects on both humans and farmed animals. Methods: We analyzed three groups of pigs: a control group (fed a standard diet), and the DON and ZEN groups, fed a diet containing 8 mg/kg DON and 0.8 mg/kg ZEN respectively, for four weeks. Results: DON and ZEN exposure decreased body weight (BW), average daily feed intake (ADFI), food conversion rate (FCR), and the serum levels of immunoglobulin (Ig)G and IgM. The total antioxidant levels significantly decreased in serum and increased in urine samples of both treatment groups. Additionally, DON and ZEN exposure increased serotonin levels in urine. Hematological parameters were not affected by the investigated toxins. Microscopic lesions were evident in sections of kidneys from either treatment group: we found sporadic interstitial nephritis in the DON group and renal glomerulus atrophy in the ZEN group. The expression levels of inflammatory cytokines and chemokine marker genes were reduced in tissues from DON- and ZEN-exposed pigs. Conclusions: chronic ingestion of high doses of DON and ZEN alters the immune response and causes organs damage, and might be associated with various diseases in pigs.
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Affiliation(s)
- Kondreddy Eswar Reddy
- Animal Nutritional & Physiology Team, National Institute of Animal Science, Rural Development Administration, (55365)#1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju 55365, Korea; (K.E.R.), (J.S.); (H.-J.L.); (M.K.); (D.-Wook.K.); (H.J.J.); (Y.L.); (D.-Woon.K.); (Y.K.O.)
| | - Jaeyong Song
- Animal Nutritional & Physiology Team, National Institute of Animal Science, Rural Development Administration, (55365)#1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju 55365, Korea; (K.E.R.), (J.S.); (H.-J.L.); (M.K.); (D.-Wook.K.); (H.J.J.); (Y.L.); (D.-Woon.K.); (Y.K.O.)
| | - Hyun-Jeong Lee
- Animal Nutritional & Physiology Team, National Institute of Animal Science, Rural Development Administration, (55365)#1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju 55365, Korea; (K.E.R.), (J.S.); (H.-J.L.); (M.K.); (D.-Wook.K.); (H.J.J.); (Y.L.); (D.-Woon.K.); (Y.K.O.)
| | - Minseok Kim
- Animal Nutritional & Physiology Team, National Institute of Animal Science, Rural Development Administration, (55365)#1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju 55365, Korea; (K.E.R.), (J.S.); (H.-J.L.); (M.K.); (D.-Wook.K.); (H.J.J.); (Y.L.); (D.-Woon.K.); (Y.K.O.)
| | - Dong-Wook Kim
- Animal Nutritional & Physiology Team, National Institute of Animal Science, Rural Development Administration, (55365)#1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju 55365, Korea; (K.E.R.), (J.S.); (H.-J.L.); (M.K.); (D.-Wook.K.); (H.J.J.); (Y.L.); (D.-Woon.K.); (Y.K.O.)
| | - Hyun Jung Jung
- Animal Nutritional & Physiology Team, National Institute of Animal Science, Rural Development Administration, (55365)#1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju 55365, Korea; (K.E.R.), (J.S.); (H.-J.L.); (M.K.); (D.-Wook.K.); (H.J.J.); (Y.L.); (D.-Woon.K.); (Y.K.O.)
| | - Bumseok Kim
- College of Veterinary Medicine, Chonbuk National University, Ilsan 54596, Korea;
| | - Yookyung Lee
- Animal Nutritional & Physiology Team, National Institute of Animal Science, Rural Development Administration, (55365)#1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju 55365, Korea; (K.E.R.), (J.S.); (H.-J.L.); (M.K.); (D.-Wook.K.); (H.J.J.); (Y.L.); (D.-Woon.K.); (Y.K.O.)
| | - Dongjo Yu
- Swine Science Division, National Institute of Animal Science, RDA, Chungnam 31000, Korea;
| | - Dong-Woon Kim
- Animal Nutritional & Physiology Team, National Institute of Animal Science, Rural Development Administration, (55365)#1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju 55365, Korea; (K.E.R.), (J.S.); (H.-J.L.); (M.K.); (D.-Wook.K.); (H.J.J.); (Y.L.); (D.-Woon.K.); (Y.K.O.)
| | - Young Kyoon Oh
- Animal Nutritional & Physiology Team, National Institute of Animal Science, Rural Development Administration, (55365)#1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju 55365, Korea; (K.E.R.), (J.S.); (H.-J.L.); (M.K.); (D.-Wook.K.); (H.J.J.); (Y.L.); (D.-Woon.K.); (Y.K.O.)
| | - Sung Dae Lee
- Animal Nutritional & Physiology Team, National Institute of Animal Science, Rural Development Administration, (55365)#1500 Kongjwipatjwi-ro, Iseo-myeon, Wanju 55365, Korea; (K.E.R.), (J.S.); (H.-J.L.); (M.K.); (D.-Wook.K.); (H.J.J.); (Y.L.); (D.-Woon.K.); (Y.K.O.)
- Correspondence: ; Tel.: +82-63-238-7454; Fax: +82-63-238-7497
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Centuori SM, Gomes CJ, Kim SS, Putnam CW, Larsen BT, Garland LL, Mount DW, Martinez JD. Double-negative (CD27 -IgD -) B cells are expanded in NSCLC and inversely correlate with affinity-matured B cell populations. J Transl Med 2018; 16:30. [PMID: 29448960 PMCID: PMC5815250 DOI: 10.1186/s12967-018-1404-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 02/07/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The presence of B cells in early stage non-small cell lung cancer (NSCLC) is associated with longer survival, however, the role these cells play in the generation and maintenance of anti-tumor immunity is unclear. B cells differentiate into a variety of subsets with differing characteristics and functions. To date, there is limited information on the specific B cell subsets found within NSCLC. To better understand the composition of the B cell populations found in NSCLC we have begun characterizing B cells in lung tumors and have detected a population of B cells that are CD79A+CD27-IgD-. These CD27-IgD- (double-negative) B cells have previously been characterized as unconventional memory B cells and have been detected in some autoimmune diseases and in the elderly population but have not been detected previously in tumor tissue. METHODS A total of 15 fresh untreated NSCLC tumors and 15 matched adjacent lung control tissues were dissociated and analyzed by intracellular flow cytometry to detect the B cell-related markers CD79A, CD27 and IgD. All CD79A+ B cells subsets were classified as either naïve (CD27-IgD+), affinity-matured (CD27+IgD-), early memory/germinal center cells (CD27+IgD+) or double-negative B cells (CD27-IgD-). Association of double-negative B cells with clinical data including gender, age, smoking status, tumor diagnosis and pathologic differentiation status were also examined using the logistic regression analysis for age and student's t-test for all other variables. Associations with other B cell subpopulations were examined using Spearman's rank correlation. RESULTS We observed that double-negative B cells were frequently abundant in lung tumors compared to normal adjacent controls (13 out of 15 cases), and in some cases made up a substantial proportion of the total B cell compartment. The presence of double-negative cells was also found to be inversely related to the presence of affinity-matured B cells within the tumor, Spearman's coefficient of - 0.76. CONCLUSIONS This study is the first to observe the presence of CD27-IgD- double-negative B cells in human NSCLC and that this population is inversely correlated with traditional affinity-matured B cell populations.
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Affiliation(s)
- Sara M. Centuori
- University of Arizona Cancer Center, University of Arizona, 1515 N. Campbell Ave., Tucson, AZ 85724 USA
| | - Cecil J. Gomes
- Cancer Biology Graduate Interdisciplinary Program, University of Arizona, Tucson, AZ 85724 USA
| | - Samuel S. Kim
- Department of Surgery, University of Arizona, Tucson, AZ 85724 USA
| | - Charles W. Putnam
- University of Arizona Cancer Center, University of Arizona, 1515 N. Campbell Ave., Tucson, AZ 85724 USA
- Department of Surgery, University of Arizona, Tucson, AZ 85724 USA
| | - Brandon T. Larsen
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Scottsdale, AZ 85259 USA
| | - Linda L. Garland
- University of Arizona Cancer Center, University of Arizona, 1515 N. Campbell Ave., Tucson, AZ 85724 USA
- Department of Medicine, Division of Hematology/Oncology, University of Arizona, Tucson, AZ 85724 USA
| | - David W. Mount
- Department of Molecular and Cellular Biology, University of Arizona, Tucson, AZ 85724 USA
| | - Jesse D. Martinez
- University of Arizona Cancer Center, University of Arizona, 1515 N. Campbell Ave., Tucson, AZ 85724 USA
- Cell & Molecular Medicine, University of Arizona, Tucson, AZ 85724 USA
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26
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Chirumbolo S, Bjørklund G, Sboarina A, Vella A. The role of basophils as innate immune regulatory cells in allergy and immunotherapy. Hum Vaccin Immunother 2018; 14:815-831. [PMID: 29257936 DOI: 10.1080/21645515.2017.1417711] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Basophils are circulating cells that are associated quite exclusively with allergy response and hypersensitivity reactions but their role in the immune network might be much more intriguing and complex than previously expected. The feasibility of testing their biology in vitro for allergy research and diagnosis, due fundamentally to their quite easy availability in the peripheral blood, made them the major source for assessing allergy in the laboratory assay, when yet many further cells such as mast cells and eosinophils are much more involved as effector cells in allergy than circulating basophils. Interestingly, basophil numbers change rarely in peripheral blood during an atopic response, while we might yet observe an increase in eosinophils and modification in the biology of mast cells in the tissue during an hypersensitivity response. Furthermore, the fact that basophils are very scanty in numbers suggests that they should mainly serve as regulatory cells in immunity, rather than effector leukocytes, as still believed by the majority of physicians. In this review we will try to describe and elucidate the possible role of these cells, known as "innate IL4-producing cells" in the immune regulation of allergy and their function in allergen immunotherapy.
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Affiliation(s)
- Salvatore Chirumbolo
- a Department of Neurological and Movement Sciences , University of Verona , Verona , Italy
| | - Geir Bjørklund
- b Council for Nutritional and Environmental Medicine (CONEM) , Mo i Rana , Norway
| | - Andrea Sboarina
- c Department of Surgery , Dentistry, Paediatrics and Gynaecology-University of Verona , Verona , Italy
| | - Antonio Vella
- d Unit of Immunology-Azienda Ospedaliera Universitaria Integrata (AOUI) , Verona , Italy
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IgH isotype-specific B cell receptor expression influences B cell fate. Proc Natl Acad Sci U S A 2017; 114:E8411-E8420. [PMID: 28923960 DOI: 10.1073/pnas.1704962114] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Ig heavy chain (IgH) isotypes (e.g., IgM, IgG, and IgE) are generated as secreted/soluble antibodies (sIg) or as membrane-bound (mIg) B cell receptors (BCRs) through alternative RNA splicing. IgH isotype dictates soluble antibody function, but how mIg isotype influences B cell behavior is not well defined. We examined IgH isotype-specific BCR function by analyzing naturally switched B cells from wild-type mice, as well as by engineering polyclonal Ighγ1/γ1 and Ighε/ε mice, which initially produce IgG1 or IgE from their respective native genomic configurations. We found that B cells from wild-type mice, as well as Ighγ1/γ1 and Ighε/ε mice, produce transcripts that generate IgM, IgG1, and IgE in an alternative splice form bias hierarchy, regardless of cell stage. In this regard, we found that mIgμ > mIgγ1 > mIgε, and that these BCR expression differences influence respective developmental fitness. Restrained B cell development from Ighγ1/γ1 and Ighε/ε mice was proportional to sIg/mIg ratios and was rescued by enforced expression of the respective mIgs. In addition, artificially enhancing BCR signal strength permitted IgE+ memory B cells-which essentially do not exist under normal conditions-to provide long-lived memory function, suggesting that quantitative BCR signal weakness contributes to restraint of IgE B cell responses. Our results indicate that IgH isotype-specific mIg/BCR dosage may play a larger role in B cell fate than previously anticipated.
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28
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CXCR4 signaling and function require the expression of the IgD-class B-cell antigen receptor. Proc Natl Acad Sci U S A 2017; 114:5231-5236. [PMID: 28461496 DOI: 10.1073/pnas.1621512114] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Mature B cells coexpress both IgM and IgD B-cell antigen receptor (BCR) classes, which are organized on the cell surface in distinct protein islands. The specific role of the IgD-BCR is still enigmatic, but it is colocalized with several other receptors on the B-cell surface, including the coreceptor CD19. Here, we report that the chemokine receptor CXCR4 is also found in proximity to the IgD-BCR. Furthermore, B cells from IgD-deficient mice show defects in CXCL12-mediated CXCR4 signaling and B-cell migration, whereas B cells from IgM-deficient mice are normal in this respect. CXCR4 activation results in actin cytoskeleton remodeling and PI3K/Akt and Erk signaling in an IgD-BCR-dependent manner. The defects in CXCR4 signaling in IgD-deficient B cells can be overcome by anti-CD19 antibody stimulation that also increases CXCL12-mediated B-cell migration of normal B cells. These results show that the IgD-BCR, CD19, and CXCR4 are not only colocalized at nanometer distances but are also functionally connected, thus providing a unique paradigm of receptor signaling cross talk and function.
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29
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Soares RR, Antinarelli LMR, Abramo C, Macedo GC, Coimbra ES, Scopel KKG. What do we know about the role of regulatory B cells (Breg) during the course of infection of two major parasitic diseases, malaria and leishmaniasis? Pathog Glob Health 2017; 111:107-115. [PMID: 28353409 PMCID: PMC5445636 DOI: 10.1080/20477724.2017.1308902] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Parasitic diseases, such as malaria and leishmaniasis, are relevant public health problems worldwide. For both diseases, the alarming number of clinical cases and deaths reported annually has justified the incentives directed to better understanding of host's factors associated with susceptibility to infection or protection. In this context, over recent years, some studies have given special attention to B lymphocytes with a regulator phenotype, known as Breg cells. Essentially important in the maintenance of immunological tolerance, especially in autoimmune disease models such as rheumatoid arthritis and experimentally induced autoimmune encephalomyelitis, the function of these lymphocytes has so far been poorly explored during the course of diseases caused by parasites. As the activation of Breg cells has been proposed as a possible therapeutic or vaccine strategy against several diseases, here we reviewed studies focused on understanding the relation of parasite and Breg cells in malaria and leishmaniasis, and the possible implications of these strategies in the course of both infections.
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Zümrüt HE, Batool S, Van N, George S, Bhandari S, Mallikaratchy P. Structural optimization of an aptamer generated from Ligand-Guided Selection (LIGS) resulted in high affinity variant toward mIgM expressed on Burkitt's lymphoma cell lines. Biochim Biophys Acta Gen Subj 2017; 1861:1825-1832. [PMID: 28363693 DOI: 10.1016/j.bbagen.2017.03.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 03/21/2017] [Accepted: 03/27/2017] [Indexed: 11/27/2022]
Abstract
Aptamers are synthetic, short nucleic acid molecules capable of specific target recognition. Aptamers are selected using a screening method termed Systematic Evolution of Ligands by Exponential enrichment (SELEX). We recently have introduced a variant of SELEX called "Ligand-Guided-Selection" (LIGS) that allows the identification of specific aptamers against known cell-surface proteins. Utilizing LIGS, we introduced three specific aptamers against membrane-bound IgM (mIgM), which is the hallmark of B cells. Out of the three aptamers selected against mIgM, an aptamer termed R1, in particular, was found to be interesting due to its ability to recognize mIgM on target cells and then block anti-IgM antibodies binding their antigen. We systematically truncated parent aptamer R1 to design shorter variants with enhanced affinity. Importantly, herein we show that the specificity of the most optimized variant of R1 aptamer is similar to that of anti-IgM antibody, indicating that the specificity of the ligand utilized in selective elution of the aptamer determines the specificity of the LIGS-generated aptamer. Furthermore, we report that truncated variants of R1 are able to recognize mIgM-positive human B lymphoma BJAB cells at physiological temperature, demonstrating that LIGS-generated aptamers could be re-optimized into higher affinity variants. Collectively, these findings show the significance of LIGS in generating highly specific aptamers with potential applications in biomedicine.
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Affiliation(s)
- Hasan E Zümrüt
- Ph.D. Program in Chemistry and Biochemistry, CUNY Graduate Center, 365 Fifth Avenue, New York, NY 10016, USA
| | - Sana Batool
- Department of Chemistry, Lehman College, The City University of New York, 250 Bedford Park Blvd. West, Bronx, NY 10468, USA
| | - Nabeela Van
- Department of Chemistry, Lehman College, The City University of New York, 250 Bedford Park Blvd. West, Bronx, NY 10468, USA
| | - Shanell George
- Department of Chemistry, Lehman College, The City University of New York, 250 Bedford Park Blvd. West, Bronx, NY 10468, USA
| | - Sanam Bhandari
- Department of Chemistry, Lehman College, The City University of New York, 250 Bedford Park Blvd. West, Bronx, NY 10468, USA
| | - Prabodhika Mallikaratchy
- Department of Chemistry, Lehman College, The City University of New York, 250 Bedford Park Blvd. West, Bronx, NY 10468, USA; Ph.D. Program in Chemistry and Biochemistry, CUNY Graduate Center, 365 Fifth Avenue, New York, NY 10016, USA; Ph.D. Program in Molecular, Cellular and Developmental Biology, CUNY Graduate Center, 365 Fifth Avenue, New York, NY 10016, USA.
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31
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Phylogenetic analysis of the human antibody repertoire reveals quantitative signatures of immune senescence and aging. Proc Natl Acad Sci U S A 2017; 114:1105-1110. [PMID: 28096374 DOI: 10.1073/pnas.1617959114] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The elderly have reduced humoral immunity, as manifested by increased susceptibility to infections and impaired vaccine responses. To investigate the effects of aging on B-cell receptor (BCR) repertoire evolution during an immunological challenge, we used a phylogenetic distance metric to analyze Ig heavy-chain transcript sequences in both young and elderly individuals before and after influenza vaccination. We determined that BCR repertoires become increasingly specialized over a span of decades, but less plastic. In 50% of the elderly individuals, a large space in the repertoire was occupied by a small number of recall lineages that did not decline during vaccine response and contained hypermutated IgD+ B cells. Relative to their younger counterparts, older subjects demonstrated a contracted naive repertoire and diminished intralineage diversification, signifying a reduced substrate for mounting novel responses and decreased fine-tuning of BCR specificities by somatic hypermutation. Furthermore, a larger proportion of the repertoire exhibited premature stop codons in some elderly subjects, indicating that aging may negatively affect the ability of B cells to discriminate between functional and nonfunctional receptors. Finally, we observed a decreased incidence of radical mutations compared with conservative mutations in elderly subjects' vaccine responses, which suggests that accumulating original antigenic sin may be limiting the accessible space for paratope evolution. Our findings shed light on the complex interplay of environmental and gerontological factors affecting immune senescence, and provide direct molecular characterization of the effects of senescence on the immune repertoire.
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32
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Sabouri Z, Perotti S, Spierings E, Humburg P, Yabas M, Bergmann H, Horikawa K, Roots C, Lambe S, Young C, Andrews TD, Field M, Enders A, Reed JH, Goodnow CC. IgD attenuates the IgM-induced anergy response in transitional and mature B cells. Nat Commun 2016; 7:13381. [PMID: 27830696 PMCID: PMC5109548 DOI: 10.1038/ncomms13381] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 09/28/2016] [Indexed: 01/10/2023] Open
Abstract
Self-tolerance by clonal anergy of B cells is marked by an increase in IgD and decrease in IgM antigen receptor surface expression, yet the function of IgD on anergic cells is obscure. Here we define the RNA landscape of the in vivo anergy response, comprising 220 induced sequences including a core set of 97. Failure to co-express IgD with IgM decreases overall expression of receptors for self-antigen, but paradoxically increases the core anergy response, exemplified by increased Sdc1 encoding the cell surface marker syndecan-1. IgD expressed on its own is nevertheless competent to induce calcium signalling and the core anergy mRNA response. Syndecan-1 induction correlates with reduction of surface IgM and is exaggerated without surface IgD in many transitional and mature B cells. These results show that IgD attenuates the response to self-antigen in anergic cells and promotes their accumulation. In this way, IgD minimizes tolerance-induced holes in the pre-immune antibody repertoire. Self-reactive B cells that are anergic express mainly IgD, yet the function of IgD is not clear. Here the authors analyse primary B cells from mice to show that IgD signalling attenuates self-antigen induced gene expression and promotes survival of anergic B cells that might go on to reactivate to foreign antigens and mutate away from self-reactivity.
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Affiliation(s)
- Zahra Sabouri
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - Samuel Perotti
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - Emily Spierings
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - Peter Humburg
- Immunology Division, The Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, New South Wales 2010, Australia
| | - Mehmet Yabas
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia.,Department of Genetics and Bioengineering, Trakya University, 22030 Edirne, Turkey
| | - Hannes Bergmann
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - Keisuke Horikawa
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - Carla Roots
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - Samantha Lambe
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - Clara Young
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - T Dan Andrews
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - Matthew Field
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - Anselm Enders
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia
| | - Joanne H Reed
- Immunology Division, The Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, New South Wales 2010, Australia
| | - Christopher C Goodnow
- Department of Immunology, John Curtin School of Medical Research, The Australian National University, 131 Garran Rd, Acton, Australian Capital Territory 2601, Australia.,Immunology Division, The Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, New South Wales 2010, Australia.,St Vincent's Clinical School, School of Medicine, University of New South Wales, Darlinghurst, New South Wales 2010, Australia
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33
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Londono-Renteria B, Cardenas JC, Troupin A, Colpitts TM. Natural Mosquito-Pathogen Hybrid IgG4 Antibodies in Vector-Borne Diseases: A Hypothesis. Front Immunol 2016; 7:380. [PMID: 27746778 PMCID: PMC5040711 DOI: 10.3389/fimmu.2016.00380] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 09/08/2016] [Indexed: 12/24/2022] Open
Abstract
Chronic exposure to antigens may favor the production of IgG4 antibodies over other antibody types. Recent studies have shown that up to a 30% of normal human IgG4 is bi-specific and is able to recognize two antigens of different nature. A requirement for this specificity is the presence of both eliciting antigens in the same time and at the same place where the immune response is induced. During transmission of most vector-borne diseases, the pathogen is delivered to the vertebrate host along with the arthropod saliva during blood feeding and previous studies have shown the existence of IgG4 antibodies against mosquito salivary allergens. However, there is very little ongoing research or information available regarding IgG4 bi-specificity with regard to infectious disease, particularly during immune responses to vector-borne diseases, such as malaria, filariasis, or dengue virus infection. Here, we provide background information and present our hypothesis that IgG4 may not only be a useful tool to measure exposure to infected mosquito bites, but that these bi-specific antibodies may also play an important role in modulation of the immune response against malaria and other vector-borne diseases in endemic settings.
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Affiliation(s)
- Berlin Londono-Renteria
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine , Columbia, SC , USA
| | - Jenny C Cardenas
- Clinical Laboratory, Hospital Los Patios , Los Patios , Colombia
| | - Andrea Troupin
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine , Columbia, SC , USA
| | - Tonya M Colpitts
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine , Columbia, SC , USA
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Schaut RG, Lamb IM, Toepp AJ, Scott B, Mendes-Aguiar CO, Coutinho JFV, Jeronimo SMB, Wilson ME, Harty JT, Waldschmidt TJ, Petersen CA. Regulatory IgDhi B Cells Suppress T Cell Function via IL-10 and PD-L1 during Progressive Visceral Leishmaniasis. THE JOURNAL OF IMMUNOLOGY 2016; 196:4100-9. [PMID: 27076677 DOI: 10.4049/jimmunol.1502678] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 03/08/2016] [Indexed: 01/13/2023]
Abstract
During visceral leishmaniasis (VL), Th1-based inflammation is induced to control intracellular parasites. Inflammation-based pathology was shown to be dampened by IL-10 and eventual programmed death 1-mediated T cell exhaustion. Cell type(s) responsible for the initiation of T cell-produced IL-10 during VL are unknown. CD19(+), CD5(-), CD1d(-), IgD(hi) regulatory B cells from healthy controls produced IL-10 in the absence of infection or stimulation, in contrast to IgD(lo/neg) B cells. IgD(hi) B cells may have a de novo versus induced regulatory program. The population of IgD(hi) B cells increased 3-fold as VL progressed. B cells from VL dogs were necessary and sufficient to suppress Th1 cell effector function. IgD(hi) B cells induced IL-10 production by T cells and IgD(lo) B cells. Blockage of B cell-specific PD-L1 restored Th1 responses. IgD(hi) regulatory B cells represent a novel regulatory B cell that may precipitate T cell exhaustion during VL.
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Affiliation(s)
- Robert G Schaut
- Department of Epidemiology, University of Iowa College of Public Health, Iowa City, IA 52242
| | - Ian M Lamb
- Department of Epidemiology, University of Iowa College of Public Health, Iowa City, IA 52242
| | - Angela J Toepp
- Department of Epidemiology, University of Iowa College of Public Health, Iowa City, IA 52242
| | - Benjamin Scott
- Department of Epidemiology, University of Iowa College of Public Health, Iowa City, IA 52242
| | - Carolina O Mendes-Aguiar
- Department of Biochemistry, Health Graduate Program, Institute of Tropical Medicine, Federal University of Rio Grande do Norte, Natal 1655, 59072-970, Brazil; Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro 4365, 21045-900, Brazil
| | - Jose F V Coutinho
- Department of Biochemistry, Health Graduate Program, Institute of Tropical Medicine, Federal University of Rio Grande do Norte, Natal 1655, 59072-970, Brazil; Center for Zoonosis, Health Secretariat, Natal 1655, 59072-970, Brazil; and
| | - Selma M B Jeronimo
- Department of Biochemistry, Health Graduate Program, Institute of Tropical Medicine, Federal University of Rio Grande do Norte, Natal 1655, 59072-970, Brazil
| | - Mary E Wilson
- Immunology Program, University of Iowa Carver College of Medicine, Iowa City, IA 52242
| | - John T Harty
- Immunology Program, University of Iowa Carver College of Medicine, Iowa City, IA 52242
| | - Thomas J Waldschmidt
- Immunology Program, University of Iowa Carver College of Medicine, Iowa City, IA 52242
| | - Christine A Petersen
- Department of Epidemiology, University of Iowa College of Public Health, Iowa City, IA 52242; Immunology Program, University of Iowa Carver College of Medicine, Iowa City, IA 52242
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35
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Maity PC, Blount A, Jumaa H, Ronneberger O, Lillemeier BF, Reth M. B cell antigen receptors of the IgM and IgD classes are clustered in different protein islands that are altered during B cell activation. Sci Signal 2015; 8:ra93. [PMID: 26373673 DOI: 10.1126/scisignal.2005887] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The B cell antigen receptors (BCRs) play an important role in the clonal selection of B cells and their differentiation into antibody-secreting plasma cells. Mature B cells have both immunoglobulin M (IgM) and IgD types of BCRs, which have identical antigen-binding sites and are both associated with the signaling subunits Igα and Igβ, but differ in their membrane-bound heavy chain isoforms. By two-color direct stochastic optical reconstruction microscopy (dSTORM), we showed that IgM-BCRs and IgD-BCRs reside in the plasma membrane in different protein islands with average sizes of 150 and 240 nm, respectively. Upon B cell activation, the BCR protein islands became smaller and more dispersed such that the IgM-BCRs and IgD-BCRs were found in close proximity to each other. Moreover, specific stimulation of one class of BCR had minimal effects on the organization of the other. These conclusions were supported by the findings from two-marker transmission electron microscopy and proximity ligation assays. Together, these data provide evidence for a preformed multimeric organization of BCRs on the plasma membrane that is remodeled after B cell activation.
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Affiliation(s)
- Palash Chandra Maity
- BIOSS Centre for Biological Signalling Studies, University of Freiburg, D-79104 Freiburg, Germany. Department of Molecular Immunology, Institute of Biology III at the Faculty of Biology of the University of Freiburg, D-79104, and at the Max Planck Institute of Immunobiology and Epigenetics, D-79108 Freiburg, Germany.
| | - Amy Blount
- Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Hassan Jumaa
- Department of Molecular Immunology, Institute of Biology III at the Faculty of Biology of the University of Freiburg, D-79104, and at the Max Planck Institute of Immunobiology and Epigenetics, D-79108 Freiburg, Germany. Institute of Immunology, Ulm University, D-89081 Ulm, Germany
| | - Olaf Ronneberger
- BIOSS Centre for Biological Signalling Studies, University of Freiburg, D-79104 Freiburg, Germany. Institute of Computer Science, University of Freiburg, D-79110 Freiburg Germany
| | | | - Michael Reth
- BIOSS Centre for Biological Signalling Studies, University of Freiburg, D-79104 Freiburg, Germany. Department of Molecular Immunology, Institute of Biology III at the Faculty of Biology of the University of Freiburg, D-79104, and at the Max Planck Institute of Immunobiology and Epigenetics, D-79108 Freiburg, Germany.
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Wilmore JR, Asito AS, Wei C, Piriou E, Sumba PO, Sanz I, Rochford R. AID expression in peripheral blood of children living in a malaria holoendemic region is associated with changes in B cell subsets and Epstein-Barr virus. Int J Cancer 2014; 136:1371-80. [PMID: 25099163 DOI: 10.1002/ijc.29127] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 07/23/2014] [Indexed: 01/05/2023]
Abstract
The development of endemic Burkitt's lymphoma (eBL) is closely associated with Epstein-Barr virus (EBV) infection and holoendemic malaria infections. The role of EBV in the development of malignancy has been studied in depth, but there is still little known about the mechanisms by which malaria affects Burkitt's lymphomagenesis. Activation induced cytidine deaminase (AID) expression is necessary for the introduction of c-myc translocations that are characteristic of BL, but a link between AID and EBV or malaria is unclear. To determine whether frequency of malaria exposure leads to increased AID expression in peripheral blood mononuclear cells (PBMC) we examined two cohorts of children in western Kenya with endemic and sporadic malaria transmission dynamics. High frequency of malaria exposure led to increased expression of AID, which coincided with decreases in the IgM(+) memory B cells. In the children from the malaria endemic region, the presence of a detectible EBV viral load was associated with higher AID expression compared to children with undetectable EBV, but this effect was not seen in children with sporadic exposure to malaria. This study demonstrates that intensity of malaria transmission correlates with AID expression levels in the presence of EBV suggesting that malaria and EBV infection have a synergistic effect on the development of c-myc translocations and BL.
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Affiliation(s)
- Joel R Wilmore
- Center for Global Health and Translational Science, Department of Microbiology and Immunology, State University of New York Upstate Medical University, Syracuse, NY
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Kläsener K, Maity PC, Hobeika E, Yang J, Reth M. B cell activation involves nanoscale receptor reorganizations and inside-out signaling by Syk. eLife 2014; 3:e02069. [PMID: 24963139 PMCID: PMC4067077 DOI: 10.7554/elife.02069] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Binding of antigen to the B cell antigen receptor (BCR) initiates a multitude of events resulting in B cell activation. How the BCR becomes signaling-competent upon antigen binding is still a matter of controversy. Using a high-resolution proximity ligation assay (PLA) to monitor the conformation of the BCR and its interactions with co-receptors at a 10-20 nm resolution, we provide direct evidence for the opening of BCR dimers during B cell activation. We also show that upon binding Syk opens the receptor by an inside-out signaling mechanism that amplifies BCR signaling. Furthermore, we found that on resting B cells, the coreceptor CD19 is in close proximity with the IgD-BCR and on activated B cells with the IgM-BCR, indicating nanoscale reorganization of receptor clusters during B cell activation.DOI: http://dx.doi.org/10.7554/eLife.02069.001.
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Affiliation(s)
- Kathrin Kläsener
- BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany Department of Molecular Immunology, Biology III, Faculty of Biology, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany Max Planck Institute for Immunobiology and Epigenetics, Freiburg, Germany
| | - Palash C Maity
- BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany Department of Molecular Immunology, Biology III, Faculty of Biology, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany Max Planck Institute for Immunobiology and Epigenetics, Freiburg, Germany
| | - Elias Hobeika
- BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany Department of Molecular Immunology, Biology III, Faculty of Biology, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany Max Planck Institute for Immunobiology and Epigenetics, Freiburg, Germany
| | - Jianying Yang
- BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany Department of Molecular Immunology, Biology III, Faculty of Biology, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany Max Planck Institute for Immunobiology and Epigenetics, Freiburg, Germany
| | - Michael Reth
- BIOSS Centre for Biological Signalling Studies, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany Department of Molecular Immunology, Biology III, Faculty of Biology, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany Max Planck Institute for Immunobiology and Epigenetics, Freiburg, Germany
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Comparative proteomic analysis of peritoneal dialysate from chronic glomerulonephritis patients. BIOMED RESEARCH INTERNATIONAL 2013; 2013:863860. [PMID: 23762862 PMCID: PMC3666394 DOI: 10.1155/2013/863860] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 04/14/2013] [Indexed: 11/17/2022]
Abstract
Peritoneal dialysis (PD) frequently contributes to peritoneal damage which cannot be easily identified without invasive techniques, implying the urgent need for biomarkers and revealing mechanisms. Chronic glomerulonephritis (CGN) is one of the leading causes of receiving dialysis treatment. Here, we attempted to analyze the peritoneal dialysate collected from CGN patients when they receive continuous ambulatory peritoneal dialysis (CAPD) treatment for the first time and after a year to reveal the protein changes that resulted from PD. Proteins were displayed by two-dimensional gel electrophoresis (2DE). Altered gel spots were digested followed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis for protein identification. Eight proteins were found to have differential expression levels between two groups. Their differential expressions were validated by Western blots in other sets of peritoneal dialysates. Proteins identified with higher levels in the first-time dialysate suggested their dominant appearance in CGN patients, while those that showed higher levels in peritoneal dialysate collected after one year may result from initial peritoneal inflammation or changes in the permeability of the peritoneum to middle-sized proteins. All the identified proteins may provide a perceptiveness of peritoneal changes caused by PD and may function as potential biomarkers or drug targets.
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Abstract
Immunoglobulin D (IgD) has remained a mysterious antibody class for almost half a century. IgD was initially thought to be a recently evolved Ig isotype expressed only by some mammalian species, but recent discoveries in fishes and amphibians demonstrate that IgD was present in the ancestor of all jawed vertebrates and has important immunological functions. The structure of IgD has been very dynamic throughout evolution. Mammals can express IgD through alternative splicing and class switch recombination. Active cell-dependent and T-cell-independent IgM-to-IgD class switching takes place in a unique subset of human B cells from the upper aerodigestive mucosa, which provides a layer of mucosal protection by interacting with many pathogens and their virulence factors. Circulating IgD can bind to myeloid cells such as basophils and induce antimicrobial, inflammatory, and B-cell-stimulating factors upon cross-linking, which contributes to not only immune surveillance but also inflammation and tissue damage when this pathway is overactivated under pathological conditions. Recent research shows that IgD is an important immunomodulator that orchestrates an ancestral surveillance system at the interface between immunity and inflammation.
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Affiliation(s)
- Kang Chen
- Immunology Institute, Department of Medicine, Mount Sinai School of Medicine, New York, NY, USA
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Edholm ES, Bengtén E, Stafford JL, Sahoo M, Taylor EB, Miller NW, Wilson M. Identification of two IgD+ B cell populations in channel catfish, Ictalurus punctatus. THE JOURNAL OF IMMUNOLOGY 2010; 185:4082-94. [PMID: 20817869 DOI: 10.4049/jimmunol.1000631] [Citation(s) in RCA: 135] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Channel catfish Ictalurus punctatus express two Ig isotypes: IgM and IgD. Although catfish IgM has been extensively studied at the functional and structural levels, much less is known about IgD. In this study, IgM(+)/IgD(+) and IgM(-)/IgD(+) catfish B cell populations were identified through the use of anti-IgM and anti-IgD mAbs. Catfish IgM(+)/IgD(+) B cells are small and agranular. In contrast, IgM(-)/IgD(+) B cells are larger and exhibit a plasmablast morphology. The use of cell sorting, flow cytometry, and RT-PCR demonstrated that IgD(+) B cell expression varies among individuals. For example, some catfish have <5% IgM(-)/IgD(+) B cells in their PBLs, whereas in others the IgM(-)/IgD(+) B cell population can represent as much as 72%. Furthermore, IgD expressed by IgM(-)/IgD(+) B cells preferentially associates with IgL σ. Comparatively, IgM(+)/IgD(+) B cells can express any of the four catfish IgL isotypes. Also, transfection studies show that IgD functions as a typical BCR, because Igδ-chains associate with CD79a and CD79b molecules, and all membrane IgD transcripts from sorted IgM(-)/IgD(+) B cells contain viable VDJ rearrangements, with no bias in family member usage. Interestingly, all secreted IgD transcripts from IgM(+)/IgD(+) and IgM(-)/IgD(+) B cells were V-less and began with a leader spliced to Cδ1. Importantly, transfection of catfish clonal B cells demonstrated that this leader mediated IgD secretion. Together, these findings imply that catfish IgM(-)/IgD(+) B cells likely expand in response to certain pathogens and that the catfish IgD Fc-region, as has been suggested for human IgD, may function as a pattern recognition molecule.
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Affiliation(s)
- Eva-Stina Edholm
- Department of Microbiology, University of Mississippi Medical Center, Jackson, MS 39216, USA
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41
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Radaev S, Zou Z, Tolar P, Nguyen K, Nguyen A, Krueger PD, Stutzman N, Pierce S, Sun PD. Structural and functional studies of Igalphabeta and its assembly with the B cell antigen receptor. Structure 2010; 18:934-43. [PMID: 20696394 PMCID: PMC2921123 DOI: 10.1016/j.str.2010.04.019] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Revised: 04/16/2010] [Accepted: 04/21/2010] [Indexed: 11/23/2022]
Abstract
The B cell antigen receptor (BCR) plays an essential role in all phases of B cell development. Here we show that the extracellular domains of murine and human Igbeta form an I-set immunoglobulin-like structure with an interchain disulfide between cysteines on their G strands. Structural and sequence analysis suggests that Igalpha displays a similar fold as Igbeta. An Igalphabeta heterodimer model was generated based on the unique disulfide-bonded Igbeta dimer. Solution binding studies showed that the extracellular domains of Igalphabeta preferentially recognize the constant region of BCR with mu chain specificity, suggesting a role for Igalphabeta to enhance BCRmu chain signaling. Cluster mutations on Igalpha, Igbeta, and a membrane-bound form of immunoglobulin (mIgM) based on the structural model identified distinct areas of potential contacts involving charged residues on both subunits of the coreceptor and the Cmu4 domain of mIgM. These studies provide the first structural model for understanding BCR function.
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Affiliation(s)
- Sergei Radaev
- Structural Immunology Section, 12441 Parklawn Drive, Rockville, Maryland 20852, USA
| | - Zhongcheng Zou
- Structural Immunology Section, 12441 Parklawn Drive, Rockville, Maryland 20852, USA
| | - Pavel Tolar
- Lymphocyte Activation Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 12441 Parklawn Drive, Rockville, Maryland 20852, USA
| | - Khanh Nguyen
- Structural Immunology Section, 12441 Parklawn Drive, Rockville, Maryland 20852, USA
| | - AnhThao Nguyen
- Structural Immunology Section, 12441 Parklawn Drive, Rockville, Maryland 20852, USA
| | - Peter D. Krueger
- Lymphocyte Activation Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 12441 Parklawn Drive, Rockville, Maryland 20852, USA
| | - Nicole Stutzman
- Structural Immunology Section, 12441 Parklawn Drive, Rockville, Maryland 20852, USA
| | - Susan Pierce
- Lymphocyte Activation Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 12441 Parklawn Drive, Rockville, Maryland 20852, USA
| | - Peter D. Sun
- Structural Immunology Section, 12441 Parklawn Drive, Rockville, Maryland 20852, USA
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Schroeder HW, Cavacini L. Structure and function of immunoglobulins. J Allergy Clin Immunol 2010; 125:S41-52. [PMID: 20176268 DOI: 10.1016/j.jaci.2009.09.046] [Citation(s) in RCA: 1010] [Impact Index Per Article: 72.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2009] [Revised: 09/16/2009] [Accepted: 09/17/2009] [Indexed: 01/13/2023]
Abstract
Immunoglobulins are heterodimeric proteins composed of 2 heavy and 2 light chains. They can be separated functionally into variable domains that bind antigens and constant domains that specify effector functions, such as activation of complement or binding to Fc receptors. The variable domains are created by means of a complex series of gene rearrangement events and can then be subjected to somatic hypermutation after exposure to antigen to allow affinity maturation. Each variable domain can be split into 3 regions of sequence variability termed the complementarity-determining regions (CDRs) and 4 regions of relatively constant sequence termed the framework regions. The 3 CDRs of the heavy chain are paired with the 3 CDRs of the light chain to form the antigen-binding site, as classically defined. The constant domains of the heavy chain can be switched to allow altered effector function while maintaining antigen specificity. There are 5 main classes of heavy chain constant domains. Each class defines the IgM, IgG, IgA, IgD, and IgE isotypes. IgG can be split into 4 subclasses, IgG1, IgG2, IgG3, and IgG4, each with its own biologic properties, and IgA can similarly be split into IgA1 and IgA2.
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Affiliation(s)
- Harry W Schroeder
- Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294-2182, USA.
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43
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Duong BH, Ota T, Aït-Azzouzene D, Aoki-Ota M, Vela JL, Huber C, Walsh K, Gavin AL, Nemazee D. Peripheral B cell tolerance and function in transgenic mice expressing an IgD superantigen. THE JOURNAL OF IMMUNOLOGY 2010; 184:4143-58. [PMID: 20231687 DOI: 10.4049/jimmunol.0903564] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Transitional B cells turn over rapidly in vivo and are sensitive to apoptosis upon BCR ligation in vitro. However, little direct evidence addresses their tolerance sensitivity in vivo. A key marker used to distinguish these cells is IgD, which, through alternative RNA splicing of H chain transcripts, begins to be coexpressed with IgM at this stage. IgD is also expressed at high levels on naive follicular (B-2) and at lower levels on marginal zone and B-1 B cells. In this study, mice were generated to ubiquitously express a membrane-bound IgD-superantigen. These mice supported virtually no B-2 development, a greatly reduced marginal zone B cell population, but a relatively normal B-1 compartment. B cell development in the spleen abruptly halted at the transitional B cell population 1 to 2 stage, a block that could not be rescued by either Bcl-2 or BAFF overexpression. The developmentally arrested B cells appeared less mature and turned over more rapidly than nontransgenic T2 cells, exhibiting neither conventional features of anergy nor appreciable receptor editing. Paradoxically, type-2 T-independent responses were more robust in the transgenic mice, although T-dependent responses were reduced and had skewed IgL and IgH isotype usages. Nevertheless, an augmented memory response to secondary challenge was evident. The transgenic mice also had increased serum IgM, but diminished IgG, levels mirrored by the increased numbers of IgM(+) plasma cells. This model should facilitate studies of peripheral B cell tolerance, with the advantages of allowing analysis of polyclonal populations, and of B cells naturally lacking IgD.
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Affiliation(s)
- Bao Hoa Duong
- Department of Immunology and Microbial Science, Kellogg School of Science and Technology, The Scripps Research Institute, La Jolla, CA 92037, USA
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Koelsch K, Zheng NY, Zhang Q, Duty A, Helms C, Mathias MD, Jared M, Smith K, Capra JD, Wilson PC. Mature B cells class switched to IgD are autoreactive in healthy individuals. J Clin Invest 2007; 117:1558-65. [PMID: 17510706 PMCID: PMC1866247 DOI: 10.1172/jci27628] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2005] [Accepted: 03/27/2007] [Indexed: 11/17/2022] Open
Abstract
Determination of the origin and fate of autoreactive B cells is critical to understanding and treating autoimmune diseases. We report that, despite being derived from healthy people, antibodies from B cells that have class switched to IgD via genetic recombination (and thus become class switched to C delta [C delta-CS] cells) are highly reactive to self antigens. Over half of the antibodies from C delta-CS B cells bind autoantigens on human epithelioma cell line 2 (HEp-2) cells or antinuclear antigens, and a quarter bind double-stranded DNA; both groups of antibodies are frequently polyreactive. Intriguingly, some C delta-CS B cells have accumulated basic residues in the antibody variable regions that mediate anti-DNA reactivity via somatic hypermutation and selection, while other C delta-CS B cells are naturally autoreactive. Though the total percentage was appreciably less than for C delta-CS cells, a surprising 31% of IgG memory cell antibodies were somewhat autoreactive, and as expected, about 24% of naive cell antibodies were autoreactive. We interpret these findings to indicate either that autoreactive B cells can be induced to class switch to IgD or that autoreactive B cells that use IgD as the B cell receptor are not effectively deleted. Determination of the mechanism by which the majority of C delta-CS B cells are autoreactive may be important in understanding peripheral tolerance mechanisms and may provide insight into the enigmatic function of the IgD antibody.
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Affiliation(s)
- Kristi Koelsch
- Molecular Immunogenetics Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.
Department of Pathology and
Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Nai-Ying Zheng
- Molecular Immunogenetics Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.
Department of Pathology and
Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Qingzhao Zhang
- Molecular Immunogenetics Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.
Department of Pathology and
Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Andrew Duty
- Molecular Immunogenetics Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.
Department of Pathology and
Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Christina Helms
- Molecular Immunogenetics Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.
Department of Pathology and
Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Melissa D. Mathias
- Molecular Immunogenetics Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.
Department of Pathology and
Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Mathew Jared
- Molecular Immunogenetics Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.
Department of Pathology and
Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Kenneth Smith
- Molecular Immunogenetics Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.
Department of Pathology and
Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - J. Donald Capra
- Molecular Immunogenetics Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.
Department of Pathology and
Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Patrick C. Wilson
- Molecular Immunogenetics Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA.
Department of Pathology and
Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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