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Schwerdtfeger F, Hoogvliet I, van Deventer S, van Spriel AB. The conformation of tetraspanins CD53 and CD81 differentially affects their nanoscale organization and interaction with their partners. J Biol Chem 2024; 300:107685. [PMID: 39159818 DOI: 10.1016/j.jbc.2024.107685] [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: 02/23/2024] [Revised: 07/08/2024] [Accepted: 08/07/2024] [Indexed: 08/21/2024] Open
Abstract
Tetraspanins, including CD53 and CD81, are four-transmembrane proteins that affect the membrane organization to regulate cellular processes including migration, proliferation, and signaling. However, it is unclear how the organizing function of tetraspanins is regulated at the molecular level. Here, we investigated whether recently proposed "open" and "closed" conformations of tetraspanins regulate the nanoscale organization of the plasma membrane of B cells. We generated conformational mutants of CD53 (F44E) and CD81 (4A, E219Q) that represent the "closed" and "open" conformation, respectively. Surface expression of these CD53 and CD81 mutants was comparable to that of WT protein. Localization of mutant tetraspanins into nanodomains was visualized by super-resolution direct stochastic optical reconstruction microscopy. Whereas the size of these nanodomains was unaffected by conformation, the clustered fraction of "closed" CD53 was higher and of "open" CD81 lower than respective WT protein. In addition, KO cells lacking CD53 showed an increased likelihood of clustering of its partner CD45. Interestingly, "closed" CD53 interacted more with CD45 than WT CD53. Absence of CD81 lowered the cluster size of its partner CD19 and "closed" CD81 interacted less with CD19 than WT CD81, but "open" CD81 did not affect CD19 interaction. However, none of the tetraspanin conformations made significant impact on the nanoscale organization of their partners CD19 or CD45. Taken together, conformational mutations of CD53 and CD81 differentially affect their nanoscale organization, but not the organization of their partner proteins. This study improves the molecular insight into cell surface nanoscale organization by tetraspanins.
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Affiliation(s)
- Fabian Schwerdtfeger
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ilse Hoogvliet
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Sjoerd van Deventer
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Annemiek B van Spriel
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands.
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2
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Mrozowska M, Górnicki T, Olbromski M, Partyńska AI, Dzięgiel P, Rusak A. New insights into the role of tetraspanin 6, 7, and 8 in physiology and pathology. Cancer Med 2024; 13:e7390. [PMID: 39031113 PMCID: PMC11258570 DOI: 10.1002/cam4.7390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 05/24/2024] [Accepted: 06/02/2024] [Indexed: 07/22/2024] Open
Abstract
BACKGROUND The tetraspanin (TSPAN) family comprises 33 membrane receptors involved in various physiological processes in humans. Tetrasapanins are surface proteins expressed in cells of various organisms. They are localised to the cell membrane by four transmembrane domains (TM4SF). These domains bind several cell surface receptors and signalling proteins to tetraspanin-enriched lipid microdomains (TERM or TEM). Tetraspanins play a critical role in anchoring many proteins. They also act as a scaffold for cell signalling proteins. AIM To summarise how tetraspanins 6, 7 and 8 contribute to the carcinogenesis process in different types of cancer. METHODS To provide a comprehensive review of the role of tetraspanins 6, 7 and 8 in cancer biology, we conducted a thorough search in PubMed, Embase and performed manual search of reference list to collect and extract data. DISCUSSION The assembly of tetraspanins covers an area of approximately 100-400 nm. Tetraspanins are involved in various biological processes such as membrane fusion, aggregation, proliferation, adhesion, cell migration and differentiation. They can also regulate integrins, cell surface receptors and signalling molecules. Tetraspanins form direct bonds with proteins and other members of the tetraspanin family, forming a hierarchical network of interactions and are thought to be involved in cell and membrane compartmentalisation. Tetraspanins have been implicated in cancer progression and have been shown to have multiple binding partners and to promote cancer progression and metastasis. Clinical studies have documented a correlation between the level of tetraspanin expression and the prediction of cancer progression, including breast and lung cancer. CONCLUSIONS Tetraspanins are understudied in almost all cell types and their functions are not clearly defined. Fortunately, it has been possible to identify the basic mechanisms underlying the biological role of these proteins. Therefore, the purpose of this review is to describe the roles of tetraspanins 6, 7 and 8.
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Affiliation(s)
- Monika Mrozowska
- Division of Histology and Embryology, Department of Human Morphology and EmbryologyWroclaw Medical UniversityWroclawPoland
| | - Tomasz Górnicki
- Division of Histology and Embryology, Department of Human Morphology and EmbryologyWroclaw Medical UniversityWroclawPoland
| | - Mateusz Olbromski
- Division of Histology and Embryology, Department of Human Morphology and EmbryologyWroclaw Medical UniversityWroclawPoland
| | - Aleksandra Izabela Partyńska
- Division of Histology and Embryology, Department of Human Morphology and EmbryologyWroclaw Medical UniversityWroclawPoland
| | - Piotr Dzięgiel
- Division of Histology and Embryology, Department of Human Morphology and EmbryologyWroclaw Medical UniversityWroclawPoland
- Department of Human Biology, Faculty of PhysiotherapyWroclaw University of Health and Sport SciencesWroclawPoland
| | - Agnieszka Rusak
- Division of Histology and Embryology, Department of Human Morphology and EmbryologyWroclaw Medical UniversityWroclawPoland
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3
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Susa KJ, Kruse AC, Blacklow SC. Tetraspanins: structure, dynamics, and principles of partner-protein recognition. Trends Cell Biol 2024; 34:509-522. [PMID: 37783654 PMCID: PMC10980598 DOI: 10.1016/j.tcb.2023.09.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/18/2023] [Accepted: 09/07/2023] [Indexed: 10/04/2023]
Abstract
Tetraspanins are a large, highly conserved family of four-pass transmembrane (TM) proteins that play critical roles in a variety of essential cellular functions, including cell migration, protein trafficking, maintenance of membrane integrity, and regulation of signal transduction. Tetraspanins carry out these biological functions primarily by interacting with partner proteins. Here, we summarize significant advances that have revealed fundamental principles underpinning structure-function relationships in tetraspanins. We first review the structural features of tetraspanin ectodomains and full-length apoproteins, and then discuss how recent structural studies of tetraspanin complexes have revealed plasticity in partner-protein recognition that enables tetraspanins to bind to remarkably different protein families, viral proteins, and antibody fragments. Finally, we discuss major questions and challenges that remain in studying tetraspanin complexes.
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Affiliation(s)
- Katherine J Susa
- Department of Pharmaceutical Chemistry, University of California, San Francisco, CA 94158, USA.
| | - Andrew C Kruse
- Department of Biological Chemistry and Molecular Pharmacology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA.
| | - Stephen C Blacklow
- Department of Biological Chemistry and Molecular Pharmacology, Blavatnik Institute, Harvard Medical School, Boston, MA 02115, USA; Department of Cancer Biology, Dana Farber Cancer Institute, Boston, MA 02215, USA.
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4
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Schmidt SC, Massenberg A, Homsi Y, Sons D, Lang T. Microscopic clusters feature the composition of biochemical tetraspanin-assemblies and constitute building-blocks of tetraspanin enriched domains. Sci Rep 2024; 14:2093. [PMID: 38267610 PMCID: PMC10808221 DOI: 10.1038/s41598-024-52615-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 01/21/2024] [Indexed: 01/26/2024] Open
Abstract
Biochemical approaches revealed that tetraspanins are multi-regulatory proteins forming a web, where they act in tetraspanin-enriched-microdomains (TEMs). A microscopic criterion differentiating between web and TEMs is lacking. Using super-resolution microcopy, we identify co-assemblies between the tetraspanins CD9 and CD81 and CD151 and CD81. CD9 assemblies contain as well the CD9/CD81-interaction partner EWI-2. Moreover, CD9 clusters are proximal to clusters of the CD81-interaction partner CD44 and CD81-/EWI-2-interacting ezrin-radixin-moesin proteins. Assemblies scatter unorganized across the cell membrane; yet, upon EWI-2 elevation, they agglomerate into densely packed arranged-crowds in a process independent from actin dynamics. In conclusion, microscopic clusters are equivalent to biochemical tetraspanin-assemblies, defining in their entirety the tetraspanin web. Cluster-agglomeration enriches tetraspanins, which makes agglomerations to a microscopic complement of TEMs. The microscopic classification of tetraspanin assemblies advances our understanding of this enigmatic protein family, whose members play roles in a plethora of cellular functions, diseases, and pathogen infections.
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Affiliation(s)
- Sara C Schmidt
- Faculty of Mathematics and Natural Sciences, Life & Medical Sciences (LIMES) Institute, University of Bonn, Carl-Troll-Straße 31, 53115, Bonn, Germany
| | - Annika Massenberg
- Faculty of Mathematics and Natural Sciences, Life & Medical Sciences (LIMES) Institute, University of Bonn, Carl-Troll-Straße 31, 53115, Bonn, Germany
| | - Yahya Homsi
- Faculty of Mathematics and Natural Sciences, Life & Medical Sciences (LIMES) Institute, University of Bonn, Carl-Troll-Straße 31, 53115, Bonn, Germany
| | - Dominik Sons
- Faculty of Mathematics and Natural Sciences, Life & Medical Sciences (LIMES) Institute, University of Bonn, Carl-Troll-Straße 31, 53115, Bonn, Germany
| | - Thorsten Lang
- Faculty of Mathematics and Natural Sciences, Life & Medical Sciences (LIMES) Institute, University of Bonn, Carl-Troll-Straße 31, 53115, Bonn, Germany.
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5
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Arone C, Martial S, Burlaud-Gaillard J, Thoulouze MI, Roingeard P, Dutartre H, Muriaux D. HTLV-1 biofilm polarization maintained by tetraspanin CD82 is required for efficient viral transmission. mBio 2023; 14:e0132623. [PMID: 37889017 PMCID: PMC10746275 DOI: 10.1128/mbio.01326-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 09/11/2023] [Indexed: 10/28/2023] Open
Abstract
IMPORTANCE In the early stages of infection, human T-lymphotropic virus type 1 (HTLV-1) dissemination within its host is believed to rely mostly on cell-to-cell contacts. Past studies unveiled a novel mechanism of HTLV-1 intercellular transmission based on the remodeling of the host-cell extracellular matrix and the generation of cell-surface viral assemblies whose structure, composition, and function resemble bacterial biofilms. These polarized aggregates of infectious virions, identified as viral biofilms, allow the bulk delivery of viruses to target cells and may help to protect virions from immune attacks. However, viral biofilms' molecular and functional description is still in its infancy, although it is crucial to fully decipher retrovirus pathogenesis. Here, we explore the function of cellular tetraspanins (CD9, CD81, CD82) that we detect inside HTLV-1 particles within biofilms. Our results demonstrate specific roles for CD82 in the cell-surface distribution and intercellular transmission of HTLV-1 biofilms, which we document as two essential parameters for efficient viral transmission. At last, our findings indicate that N-glycosylation of cell-surface molecules, including CD82, is required for the polarization of HTLV-1 biofilms and for the efficient transmission of HTLV-1 between T-lymphocytes.
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Affiliation(s)
- Coline Arone
- Infectious Disease Research Institute of Montpellier (IRIM), UMR CNRS, Montpellier, France
| | - Samuel Martial
- Center for International Research on Infectiology (CIRI), UMR Inserm, Lyon, France
| | | | | | - Philippe Roingeard
- IBiSA Electron Microscopy Platform of Tours University, UMR Inserm, Tours, France
| | - Hélène Dutartre
- Center for International Research on Infectiology (CIRI), UMR Inserm, Lyon, France
| | - Delphine Muriaux
- Infectious Disease Research Institute of Montpellier (IRIM), UMR CNRS, Montpellier, France
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6
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Fazel M, Wester MJ, Schodt DJ, Cruz SR, Strauss S, Schueder F, Schlichthaerle T, Gillette JM, Lidke DS, Rieger B, Jungmann R, Lidke KA. High-precision estimation of emitter positions using Bayesian grouping of localizations. Nat Commun 2022; 13:7152. [PMID: 36418347 PMCID: PMC9684143 DOI: 10.1038/s41467-022-34894-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 11/10/2022] [Indexed: 11/25/2022] Open
Abstract
Single-molecule localization microscopy super-resolution methods rely on stochastic blinking/binding events, which often occur multiple times from each emitter over the course of data acquisition. Typically, the blinking/binding events from each emitter are treated as independent events, without an attempt to assign them to a particular emitter. Here, we describe a Bayesian method of inferring the positions of the tagged molecules by exploring the possible grouping and combination of localizations from multiple blinking/binding events. The results are position estimates of the tagged molecules that have improved localization precision and facilitate nanoscale structural insights. The Bayesian framework uses the localization precisions to learn the statistical distribution of the number of blinking/binding events per emitter and infer the number and position of emitters. We demonstrate the method on a range of synthetic data with various emitter densities, DNA origami constructs and biological structures using DNA-PAINT and dSTORM data. We show that under some experimental conditions it is possible to achieve sub-nanometer precision.
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Affiliation(s)
- Mohamadreza Fazel
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA
| | - Michael J Wester
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA
- Department of Mathematics and Statistics, University of New Mexico, Albuquerque, NM, USA
| | - David J Schodt
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA
| | - Sebastian Restrepo Cruz
- Department of Pathology, University of New Mexico Health Science Center, Albuquerque, NM, USA
| | - Sebastian Strauss
- Department of Physics and Center for Nanoscience, Ludwig Maximilian University, Munich, Germany
- Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Florian Schueder
- Department of Physics and Center for Nanoscience, Ludwig Maximilian University, Munich, Germany
- Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Thomas Schlichthaerle
- Department of Physics and Center for Nanoscience, Ludwig Maximilian University, Munich, Germany
- Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Jennifer M Gillette
- Department of Pathology, University of New Mexico Health Science Center, Albuquerque, NM, USA
- Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM, USA
| | - Diane S Lidke
- Department of Pathology, University of New Mexico Health Science Center, Albuquerque, NM, USA
- Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM, USA
| | - Bernd Rieger
- Department of Imaging Physics, Delft University of Technology, Delft, the Netherlands
| | - Ralf Jungmann
- Department of Physics and Center for Nanoscience, Ludwig Maximilian University, Munich, Germany
- Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Keith A Lidke
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA.
- Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM, USA.
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7
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Tetraspanin-5-mediated MHC class I clustering is required for optimal CD8 T cell activation. Proc Natl Acad Sci U S A 2022; 119:e2122188119. [PMID: 36215490 PMCID: PMC9586303 DOI: 10.1073/pnas.2122188119] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
MHC molecules are not randomly distributed on the plasma membrane but instead are present in discrete nanoclusters. The mechanisms that control formation of MHC I nanoclusters and the importance of such structures are incompletely understood. Here, we report a molecular association between tetraspanin-5 (Tspan5) and MHC I molecules that started in the endoplasmic reticulum and was maintained on the plasma membrane. This association was observed both in mouse dendritic cells and in human cancer cell lines. Loss of Tspan5 reduced the size of MHC I clusters without affecting MHC I peptide loading, delivery of complexes to the plasma membrane, or overall surface MHC I levels. Functionally, CD8 T cell responses to antigen presented by Tspan5-deficient dendritic cells were impaired but were restored by antibody-induced reclustering of MHC I molecules. In contrast, Tspan5 did not associate with two other plasma membrane proteins, Flotillin1 and CD55, with or the endoplasmic reticulum proteins Tapasin and TAP. Thus, our findings identify a mechanism underlying the clustering of MHC I molecules that is important for optimal T cell responses.
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8
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McGowan ENS, Wong O, Jones E, Nguyen J, Wee J, Demaria MC, Deliyanti D, Johnson CJ, Hickey MJ, McConville MJ, Wilkinson-Berka JL, Wright MD, Binger KJ. Tetraspanin CD82 restrains phagocyte migration but supports macrophage activation. iScience 2022; 25:104520. [PMID: 35754722 PMCID: PMC9213772 DOI: 10.1016/j.isci.2022.104520] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 03/31/2022] [Accepted: 05/27/2022] [Indexed: 12/03/2022] Open
Abstract
Phagocytes migrate into tissues to combat infection and maintain tissue homeostasis. As dysregulated phagocyte migration and function can lead to inflammation or susceptibility to infection, identifying molecules that control these processes is critical. Here, we show that the tetraspanin CD82 restrains the migration of neutrophils and macrophages into tissues. Cd82−/− phagocytes exhibited excessive migration during in vivo models of peritoneal inflammation, superfusion of CXCL1, retinopathy of prematurity, and infection with the protozoan parasite L. mexicana. However, with the latter, while Cd82−/− macrophages infiltrated infection sites at higher proportions, cutaneous L. mexicana lesions were larger and persisted, indicating a failure to control infection. Analyses of in vitro bone-marrow-derived macrophages showed CD82 deficiency altered cellular morphology, and impaired gene expression and metabolism in response to anti-inflammatory activation. Altogether, this work reveals an important role for CD82 in restraining phagocyte infiltration and mediating their differentiation in response to stimulatory cues. Tetraspanin CD82 restrains phagocyte migration in murine models of inflammation Excessive migration of Cd82−/− myeloid cells exacerbates retinal inflammation Cd82−/− macrophages have a reduced ability to clear Leishmania mexicana parasites CD82 is required for the normal morphology and activation of M2 macrophages
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Affiliation(s)
- Erin N S McGowan
- Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3052, Australia
| | - Osanna Wong
- Department of Immunology and Pathology, Alfred Research Alliance, Central Clinical School, Monash University, Melbourne, VIC 3004, Australia
| | - Eleanor Jones
- Department of Immunology and Pathology, Alfred Research Alliance, Central Clinical School, Monash University, Melbourne, VIC 3004, Australia.,Flow Cytometry and Imaging Facility, Murdoch Children's Research Institute, Parkville, VIC 3052, Australia
| | - Julie Nguyen
- Department of Immunology and Pathology, Alfred Research Alliance, Central Clinical School, Monash University, Melbourne, VIC 3004, Australia.,Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, VIC 3168, Australia
| | - Janet Wee
- Department of Immunology and Pathology, Alfred Research Alliance, Central Clinical School, Monash University, Melbourne, VIC 3004, Australia.,Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, VIC 3168, Australia
| | - Maria C Demaria
- Department of Immunology and Pathology, Alfred Research Alliance, Central Clinical School, Monash University, Melbourne, VIC 3004, Australia
| | - Devy Deliyanti
- Department of Anatomy and Physiology, School of Biomedical Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Chad J Johnson
- Bioimaging Platform, La Trobe University, Bundoora, VIC 3086, Australia
| | - Michael J Hickey
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, VIC 3168, Australia
| | - Malcolm J McConville
- Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3052, Australia
| | - Jennifer L Wilkinson-Berka
- Department of Anatomy and Physiology, School of Biomedical Sciences, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Mark D Wright
- Department of Immunology and Pathology, Alfred Research Alliance, Central Clinical School, Monash University, Melbourne, VIC 3004, Australia
| | - Katrina J Binger
- Department of Biochemistry and Pharmacology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3052, Australia.,Department of Immunology and Pathology, Alfred Research Alliance, Central Clinical School, Monash University, Melbourne, VIC 3004, Australia.,Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Sciences, La Trobe University, Bundoora, VIC 3086, Australia
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9
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Quantitative characterization of tetraspanin 8 homointeractions in the plasma membrane. Biochem J 2021; 478:3643-3654. [PMID: 34524408 DOI: 10.1042/bcj20210459] [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] [Received: 06/18/2021] [Revised: 09/13/2021] [Accepted: 09/15/2021] [Indexed: 11/17/2022]
Abstract
The spatial distribution of proteins in cell membranes is crucial for signal transduction, cell communication and membrane trafficking. Members of the Tetraspanin family organize functional protein clusters within the plasma membrane into so-called Tetraspanin-enriched microdomains (TEMs). Direct interactions between Tetraspanins are believed to be important for this organization. However, studies thus far have utilized mainly co-immunoprecipitation methods that cannot distinguish between direct and indirect, through common partners, interactions. Here we study Tetraspanin 8 homointeractions in living cells via quantitative fluorescence microscopy. We demonstrate that Tetraspanin 8 exists in a monomer-dimer equilibrium in the plasma membrane. Tetraspanin 8 dimerization is described by a high dissociation constant (Kd = 14 700 ± 1100 Tspan8/µm2), one of the highest dissociation constants measured for membrane proteins in live cells. We propose that this high dissociation constant, and thus the short lifetime of the Tetraspanin 8 dimer, is critical for Tetraspanin 8 functioning as a master regulator of cell signaling.
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10
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Saito-Reis CA, Balise VD, Pascetti EM, Jiminez M, Gillette JM. Tetraspanin CD82 regulates S1PR 1-mediated hematopoietic stem and progenitor cell mobilization. Stem Cell Reports 2021; 16:2422-2431. [PMID: 34534447 PMCID: PMC8514849 DOI: 10.1016/j.stemcr.2021.08.009] [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: 04/01/2020] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 11/16/2022] Open
Abstract
Hematopoietic stem and progenitor cell (HSPC) mobilization into the blood occurs under normal physiological conditions and is stimulated in the clinic to enable the isolation of HSPCs for transplantation therapies. In the present study, we identify the tetraspanin CD82 as a novel regulator of HSPC mobilization. Using a global CD82 knockout (CD82KO) mouse, we measure enhanced HSPC mobilization after granulocyte-colony stimulating factor (G-CSF) or AMD3100 treatment, which we find is promoted by increased surface expression of the sphingosine 1-phosphate receptor 1 (S1PR1) on CD82KO HSPCs. Additionally, we identify a disruption in S1PR1 internalization in CD82-deficient HSPCs, suggesting that CD82 plays a critical role in S1PR1 surface regulation. Finally, combining AMD3100 and anti-CD82 treatments, we detect enhanced mobilization of mouse HSPCs and human CD34+ cells in animal models. Together, these data provide evidence that CD82 is an important regulator of HSPC mobilization and suggests exploiting the CD82 scaffold as a therapeutic target to enhance stem cell isolation.
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Affiliation(s)
- Chelsea A Saito-Reis
- Department of Pathology, University of New Mexico Health Science Center, Albuquerque, NM, USA
| | - Victoria D Balise
- Department of Pathology, University of New Mexico Health Science Center, Albuquerque, NM, USA
| | - Erica M Pascetti
- Department of Pathology, University of New Mexico Health Science Center, Albuquerque, NM, USA
| | - Magdalena Jiminez
- Department of Pathology, University of New Mexico Health Science Center, Albuquerque, NM, USA
| | - Jennifer M Gillette
- Department of Pathology, University of New Mexico Health Science Center, Albuquerque, NM, USA; University of New Mexico Comprehensive Cancer Center, Albuquerque, NM, USA.
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11
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Roupakia E, Chavdoula E, Karpathiou G, Vatsellas G, Chatzopoulos D, Mela A, Gillette JM, Kriegsmann K, Kriegsmann M, Batistatou A, Goussia A, Marcu KB, Karteris E, Klinakis A, Kolettas E. Canonical NF-κB Promotes Lung Epithelial Cell Tumour Growth by Downregulating the Metastasis Suppressor CD82 and Enhancing Epithelial-to-Mesenchymal Cell Transition. Cancers (Basel) 2021; 13:cancers13174302. [PMID: 34503110 PMCID: PMC8428346 DOI: 10.3390/cancers13174302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/17/2021] [Accepted: 08/24/2021] [Indexed: 12/11/2022] Open
Abstract
Simple Summary Canonical NF-κB signalling pathway acts as a tumour promoter in several types of cancer including non-small cell lung cancer (NSCLC), but the mechanism(s) by which it contributes to NSCLC is still under investigation. We show here that NF-κB RelA/p65 is required for the tumour growth of human NSCLC cells grown in vivo as xenografts in immune-compromised mice. RNA-seq transcriptome profile analysis identified the metastasis suppressor CD82/KAI1/TSPAN27 as a canonical NF-κB target. Loss of CD82 correlated with malignancy. RelA/p65 stimulates cell migration and epithelial-to-mesenchymal cell transition (EMT), mediated, in part, by CD82/KAI1, through integrin-mediated signalling, thus, identifying a mechanism mediating NF-κB RelA/p65 lung tumour promoting function. Abstract Background: The development of non-small cell lung cancer (NSCLC) involves the progressive accumulation of genetic and epigenetic changes. These include somatic oncogenic KRAS and EGFR mutations and inactivating TP53 tumour suppressor mutations, leading to activation of canonical NF-κB. However, the mechanism(s) by which canonical NF-κB contributes to NSCLC is still under investigation. Methods: Human NSCLC cells were used to knock-down RelA/p65 (RelA/p65KD) and investigate its impact on cell growth, and its mechanism of action by employing RNA-seq analysis, qPCR, immunoblotting, immunohistochemistry, immunofluorescence and functional assays. Results: RelA/p65KD reduced the proliferation and tumour growth of human NSCLC cells grown in vivo as xenografts in immune-compromised mice. RNA-seq analysis identified canonical NF-κB targets mediating its tumour promoting function. RelA/p65KD resulted in the upregulation of the metastasis suppressor CD82/KAI1/TSPAN27 and downregulation of the proto-oncogene ROS1, and LGR6 involved in Wnt/β-catenin signalling. Immunohistochemical and bioinformatics analysis of human NSCLC samples showed that CD82 loss correlated with malignancy. RelA/p65KD suppressed cell migration and epithelial-to-mesenchymal cell transition (EMT), mediated, in part, by CD82/KAI1, through integrin-mediated signalling involving the mitogenic ERK, Akt1 and Rac1 proteins. Conclusions: Canonical NF-κB signalling promotes NSCLC, in part, by downregulating the metastasis suppressor CD82/KAI1 which inhibits cell migration, EMT and tumour growth.
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Affiliation(s)
- Eugenia Roupakia
- Laboratory of Biology, School of Medicine, Faculty of Health Sciences, Institute of Biosciences, University Research Centre, University of Ioannina, University Campus, 45110 Ioannina, Greece;
- Biomedical Research Division, Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, University of Ioannina Campus, 45115 Ioannina, Greece;
| | - Evangelia Chavdoula
- Biomedical Research Division, Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, University of Ioannina Campus, 45115 Ioannina, Greece;
- Biomedical Research Foundation, Academy of Athens (BRFAA), 4 Soranou Ephessiou Street, 11527 Athens, Greece; (G.V.); (D.C.); (K.B.M.); (A.K.)
| | - Georgia Karpathiou
- Laboratory of Pathology, School of Medicine, Faculty of Health Sciences, University of Ioannina, 45500 Ioannina, Greece; (G.K.); (A.B.); (A.G.)
| | - Giannis Vatsellas
- Biomedical Research Foundation, Academy of Athens (BRFAA), 4 Soranou Ephessiou Street, 11527 Athens, Greece; (G.V.); (D.C.); (K.B.M.); (A.K.)
| | - Dimitrios Chatzopoulos
- Biomedical Research Foundation, Academy of Athens (BRFAA), 4 Soranou Ephessiou Street, 11527 Athens, Greece; (G.V.); (D.C.); (K.B.M.); (A.K.)
| | - Angeliki Mela
- Department of Pathology and Cell Biology Columbia University Medical Center, Irving Comprehensive Cancer Research Center, Columbia University, New York, NY 10032, USA;
| | - Jennifer M. Gillette
- Department of Pathology, School of Medicine, University of New Mexico, Albuquerque, NM 87131, USA;
| | - Katharina Kriegsmann
- Department of Internal Medicine V, University Hospital Heidelberg, 69120 Heidelberg, Germany;
| | - Mark Kriegsmann
- Institute of Pathology, University Hospital Heidelberg, 69120 Heidelberg, Germany;
| | - Anna Batistatou
- Laboratory of Pathology, School of Medicine, Faculty of Health Sciences, University of Ioannina, 45500 Ioannina, Greece; (G.K.); (A.B.); (A.G.)
| | - Anna Goussia
- Laboratory of Pathology, School of Medicine, Faculty of Health Sciences, University of Ioannina, 45500 Ioannina, Greece; (G.K.); (A.B.); (A.G.)
| | - Kenneth B. Marcu
- Biomedical Research Foundation, Academy of Athens (BRFAA), 4 Soranou Ephessiou Street, 11527 Athens, Greece; (G.V.); (D.C.); (K.B.M.); (A.K.)
- Department of Biochemistry and Cell Biology, Microbiology and Pathology, Stony Brook University, New York, NY 11794, USA
| | - Emmanouil Karteris
- Division of Biosciences, Department of Life Sciences, College of Health, Medicine and Life Sciences, Brunel University London, Uxbridge, Middlesex, London UB8 PH, UK;
| | - Apostolos Klinakis
- Biomedical Research Foundation, Academy of Athens (BRFAA), 4 Soranou Ephessiou Street, 11527 Athens, Greece; (G.V.); (D.C.); (K.B.M.); (A.K.)
| | - Evangelos Kolettas
- Laboratory of Biology, School of Medicine, Faculty of Health Sciences, Institute of Biosciences, University Research Centre, University of Ioannina, University Campus, 45110 Ioannina, Greece;
- Biomedical Research Division, Institute of Molecular Biology and Biotechnology, Foundation for Research and Technology, University of Ioannina Campus, 45115 Ioannina, Greece;
- Correspondence: ; Tel.: +30-26510-07578; Fax: +30-26510-07863
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12
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Ordas L, Costa L, Lozano A, Chevillard C, Calovoulos A, Kantar D, Fernandez L, Chauvin L, Dosset P, Doucet C, Heron-Milhavet L, Odintsova E, Berditchevski F, Milhiet PE, Bénistant C. Mechanical Control of Cell Migration by the Metastasis Suppressor Tetraspanin CD82/KAI1. Cells 2021; 10:cells10061545. [PMID: 34207462 PMCID: PMC8234748 DOI: 10.3390/cells10061545] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 06/10/2021] [Accepted: 06/15/2021] [Indexed: 01/16/2023] Open
Abstract
The plasma membrane is a key actor of cell migration. For instance, its tension controls persistent cell migration and cell surface caveolae integrity. Then, caveolae constituents such as caveolin-1 can initiate a mechanotransduction loop that involves actin- and focal adhesion-dependent control of the mechanosensor YAP to finely tune cell migration. Tetraspanin CD82 (also named KAI-1) is an integral membrane protein and a metastasis suppressor. Its expression is lost in many cancers including breast cancer. It is a strong inhibitor of cell migration by a little-known mechanism. We demonstrated here that CD82 controls persistent 2D migration of EGF-induced single cells, stress fibers and focal adhesion sizes and dynamics. Mechanistically, we found that CD82 regulates membrane tension, cell surface caveolae abundance and YAP nuclear translocation in a caveolin-1-dependent manner. Altogether, our data show that CD82 controls 2D cell migration using membrane-driven mechanics involving caveolin and the YAP pathway.
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Affiliation(s)
- Laura Ordas
- Centre de Biologie Structurale (CBS), CNRS, INSERM, University Montpellier, 34090 Montpellier, France; (L.O.); (L.C.); (A.L.); (C.C.); (A.C.); (L.F.); (P.D.); (C.D.)
| | - Luca Costa
- Centre de Biologie Structurale (CBS), CNRS, INSERM, University Montpellier, 34090 Montpellier, France; (L.O.); (L.C.); (A.L.); (C.C.); (A.C.); (L.F.); (P.D.); (C.D.)
| | - Anthony Lozano
- Centre de Biologie Structurale (CBS), CNRS, INSERM, University Montpellier, 34090 Montpellier, France; (L.O.); (L.C.); (A.L.); (C.C.); (A.C.); (L.F.); (P.D.); (C.D.)
- Institut de Génétique Moléculaire de Montpellier, University Montpellier, CNRS, 34293 Montpellier, France
| | - Christopher Chevillard
- Centre de Biologie Structurale (CBS), CNRS, INSERM, University Montpellier, 34090 Montpellier, France; (L.O.); (L.C.); (A.L.); (C.C.); (A.C.); (L.F.); (P.D.); (C.D.)
| | - Alexia Calovoulos
- Centre de Biologie Structurale (CBS), CNRS, INSERM, University Montpellier, 34090 Montpellier, France; (L.O.); (L.C.); (A.L.); (C.C.); (A.C.); (L.F.); (P.D.); (C.D.)
| | - Diala Kantar
- Institut de Recherche en Cancérologie de Montpellier (IRCM), Inserm U1194—University Montpellier—Institut Régional du Cancer de Montpellier (ICM), 34298 Montpellier, France; (D.K.); (L.H.-M.)
| | - Laurent Fernandez
- Centre de Biologie Structurale (CBS), CNRS, INSERM, University Montpellier, 34090 Montpellier, France; (L.O.); (L.C.); (A.L.); (C.C.); (A.C.); (L.F.); (P.D.); (C.D.)
- European Institute of Chemistry and Biology (IECB), University of Bordeaux, 33607 Pessac, France
| | - Lucie Chauvin
- Centre de Recherche de Biologie Cellulaire de Montpellier (CRBM), CNRS UMR 5237, University Montpellier, 34293 Montpellier, France;
| | - Patrice Dosset
- Centre de Biologie Structurale (CBS), CNRS, INSERM, University Montpellier, 34090 Montpellier, France; (L.O.); (L.C.); (A.L.); (C.C.); (A.C.); (L.F.); (P.D.); (C.D.)
| | - Christine Doucet
- Centre de Biologie Structurale (CBS), CNRS, INSERM, University Montpellier, 34090 Montpellier, France; (L.O.); (L.C.); (A.L.); (C.C.); (A.C.); (L.F.); (P.D.); (C.D.)
| | - Lisa Heron-Milhavet
- Institut de Recherche en Cancérologie de Montpellier (IRCM), Inserm U1194—University Montpellier—Institut Régional du Cancer de Montpellier (ICM), 34298 Montpellier, France; (D.K.); (L.H.-M.)
| | - Elena Odintsova
- Institute of Cancer and Genomic Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; (E.O.); (F.B.)
| | - Fedor Berditchevski
- Institute of Cancer and Genomic Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; (E.O.); (F.B.)
| | - Pierre-Emmanuel Milhiet
- Centre de Biologie Structurale (CBS), CNRS, INSERM, University Montpellier, 34090 Montpellier, France; (L.O.); (L.C.); (A.L.); (C.C.); (A.C.); (L.F.); (P.D.); (C.D.)
- Correspondence: (P.-E.M.); (C.B.)
| | - Christine Bénistant
- Centre de Biologie Structurale (CBS), CNRS, INSERM, University Montpellier, 34090 Montpellier, France; (L.O.); (L.C.); (A.L.); (C.C.); (A.C.); (L.F.); (P.D.); (C.D.)
- Correspondence: (P.-E.M.); (C.B.)
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13
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CD81 knockout promotes chemosensitivity and disrupts in vivo homing and engraftment in acute lymphoblastic leukemia. Blood Adv 2021; 4:4393-4405. [PMID: 32926125 DOI: 10.1182/bloodadvances.2020001592] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 08/02/2020] [Indexed: 12/30/2022] Open
Abstract
Relapse remains a major obstacle to achieving 100% overall survival rate in pediatric hematologic malignancies like acute lymphoblastic leukemia (ALL). Relapse often results from the development of chemoresistance. One of the mechanisms of chemoresistance involves ALL cell interactions with the bone marrow (BM) microenvironment, providing a sanctuary. This phenomenon is known as BM microenvironment-induced chemoprotection. Members of the transmembrane 4 superfamily (tetraspanins; TSPANs) are known to mediate microenvironmental interactions and have been extensively studied in solid tumors. Although the TSPAN family member CD81 is a minimal residual disease marker, its biological role in ALL is not well characterized. We show for the first time that CD81 knockout induces chemosensitivity, reduces cellular adhesion, and disrupts in vivo BM homing and engraftment in B-ALL. This chemosensitization is mediated through control of Bruton tyrosine kinase signaling and induction of p53-mediated cell death. We then show how CD81-related signaling can be disrupted by treatment with the epigenetic drug combination of DNA hypomethylating agent azacitidine (aza) and histone deacetylase inhibitor panobinostat (pano), which we previously used to sensitize ALL cells to chemotherapy under conditions that promote BM microenvironment-induced chemoprotection. Aza/pano-mediated modulation of CD81 surface expression is involved in decreasing BM load by promoting ALL cell mobilization from BM to peripheral blood and increasing response to chemotherapy in disseminated patient-derived xenograft models. This study identifies the novel role of CD81 in BM microenvironment-induced chemoprotection and delineates the mechanism by which aza/pano successfully sensitizes ALL cells via modulation of CD81.
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14
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van Deventer S, Arp AB, van Spriel AB. Dynamic Plasma Membrane Organization: A Complex Symphony. Trends Cell Biol 2020; 31:119-129. [PMID: 33248874 DOI: 10.1016/j.tcb.2020.11.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/02/2020] [Accepted: 11/06/2020] [Indexed: 01/20/2023]
Abstract
Membrane protein organization is essential for proper cellular functioning and the result of a dynamic exchange between protein monomers, nanoscale protein clusters, and microscale higher-order structures. This exchange is affected by both lipid bilayer intrinsic factors, such as lipid rafts and tetraspanins, and extrinsic factors, such as cortical actin and galectins. Because membrane organizers act jointly like instruments in a symphony, it is challenging to define the 'key' organizers. Here, we posit, for the first time, definitions of key intrinsic and extrinsic membrane organizers. Tetraspanin nanodomains are key organizers that are often overlooked. We discuss how different key organizers can collaborate, which is important to get a full grasp of plasma membrane biology.
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Affiliation(s)
- Sjoerd van Deventer
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Abbey B Arp
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Annemiek B van Spriel
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands.
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15
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Yang X, Chatterjee V, Ma Y, Zheng E, Yuan SY. Protein Palmitoylation in Leukocyte Signaling and Function. Front Cell Dev Biol 2020; 8:600368. [PMID: 33195285 PMCID: PMC7655920 DOI: 10.3389/fcell.2020.600368] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 09/30/2020] [Indexed: 12/12/2022] Open
Abstract
Palmitoylation is a post-translational modification (PTM) based on thioester-linkage between palmitic acid and the cysteine residue of a protein. This covalent attachment of palmitate is reversibly and dynamically regulated by two opposing sets of enzymes: palmitoyl acyltransferases containing a zinc finger aspartate-histidine-histidine-cysteine motif (PAT-DHHCs) and thioesterases. The reversible nature of palmitoylation enables fine-tuned regulation of protein conformation, stability, and ability to interact with other proteins. More importantly, the proper function of many surface receptors and signaling proteins requires palmitoylation-meditated partitioning into lipid rafts. A growing number of leukocyte proteins have been reported to undergo palmitoylation, including cytokine/chemokine receptors, adhesion molecules, pattern recognition receptors, scavenger receptors, T cell co-receptors, transmembrane adaptor proteins, and signaling effectors including the Src family of protein kinases. This review provides the latest findings of palmitoylated proteins in leukocytes and focuses on the functional impact of palmitoylation in leukocyte function related to adhesion, transmigration, chemotaxis, phagocytosis, pathogen recognition, signaling activation, cytotoxicity, and cytokine production.
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Affiliation(s)
- Xiaoyuan Yang
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Victor Chatterjee
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Yonggang Ma
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Ethan Zheng
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
| | - Sarah Y Yuan
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL, United States.,Department of Surgery, Morsani College of Medicine, University of South Florida, Tampa, FL, United States
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16
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TSPAN5 Enriched Microdomains Provide a Platform for Dendritic Spine Maturation through Neuroligin-1 Clustering. Cell Rep 2020; 29:1130-1146.e8. [PMID: 31665629 PMCID: PMC6899445 DOI: 10.1016/j.celrep.2019.09.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 07/09/2019] [Accepted: 09/18/2019] [Indexed: 12/21/2022] Open
Abstract
Tetraspanins are a class of evolutionarily conserved transmembrane proteins with 33 members identified in mammals that have the ability to organize specific membrane domains, named tetraspanin-enriched microdomains (TEMs). Despite the relative abundance of different tetraspanins in the CNS, few studies have explored their role at synapses. Here, we investigate the function of TSPAN5, a member of the tetraspanin superfamily for which mRNA transcripts are found at high levels in the mouse brain. We demonstrate that TSPAN5 is localized in dendritic spines of pyramidal excitatory neurons and that TSPAN5 knockdown induces a dramatic decrease in spine number because of defects in the spine maturation process. Moreover, we show that TSPAN5 interacts with the postsynaptic adhesion molecule neuroligin-1, promoting its correct surface clustering. We propose that membrane compartmentalization by tetraspanins represents an additional mechanism for regulating excitatory synapses. TSPAN5 is expressed in pyramidal neurons and localizes mainly to dendritic spines TSPAN5 interacts with neuroligin-1 and promotes its clustering TSPAN5-neuroligin-1 complex is fundamental for dendritic spine maturation
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17
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Kummer D, Steinbacher T, Schwietzer MF, Thölmann S, Ebnet K. Tetraspanins: integrating cell surface receptors to functional microdomains in homeostasis and disease. Med Microbiol Immunol 2020; 209:397-405. [PMID: 32274581 PMCID: PMC7395057 DOI: 10.1007/s00430-020-00673-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 03/28/2020] [Indexed: 12/27/2022]
Abstract
Tetraspanins comprise a family of proteins embedded in the membrane through four transmembrane domains. One of the most distinctive features of tetraspanins is their ability to interact with other proteins in the membrane using their extracellular, transmembrane and cytoplasmic domains, allowing them to incorporate several proteins into clusters called tetraspanin-enriched microdomains. The spatial proximity of signaling proteins and their regulators enables a rapid functional cross-talk between these proteins, which is required for a rapid translation of extracellular signals into intracellular signaling cascades. In this article, we highlight a few examples that illustrate how tetraspanin-mediated interactions between cell surface proteins allow their functional cross-talk to regulate intracellular signaling.
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Affiliation(s)
- Daniel Kummer
- Institute-Associated Research Group: Cell Adhesion and Cell Polarity, Institute of Medical Biochemistry, ZMBE, University of Münster, Münster, Germany
- Interdisciplinary Clinical Research Center (IZKF), University of Münster, Münster, Germany
| | - Tim Steinbacher
- Institute-Associated Research Group: Cell Adhesion and Cell Polarity, Institute of Medical Biochemistry, ZMBE, University of Münster, Münster, Germany
- Cells-In-Motion Cluster of Excellence (EXC1003-CiM), University of Münster, Münster, Germany
| | - Mariel Flavia Schwietzer
- Institute-Associated Research Group: Cell Adhesion and Cell Polarity, Institute of Medical Biochemistry, ZMBE, University of Münster, Münster, Germany
| | - Sonja Thölmann
- Institute-Associated Research Group: Cell Adhesion and Cell Polarity, Institute of Medical Biochemistry, ZMBE, University of Münster, Münster, Germany
| | - Klaus Ebnet
- Institute-Associated Research Group: Cell Adhesion and Cell Polarity, Institute of Medical Biochemistry, ZMBE, University of Münster, Münster, Germany.
- Interdisciplinary Clinical Research Center (IZKF), University of Münster, Münster, Germany.
- Cells-In-Motion Cluster of Excellence (EXC1003-CiM), University of Münster, Münster, Germany.
- Institute of Medical Biochemistry, ZMBE, Von-Esmarch-Str. 56, 48149, Münster, Germany.
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18
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Yang C, Chen F, Ren P, Lofchy L, Wan C, Shen J, Wang G, Gaikwad H, Ponder J, Jordan CT, Scheinman R, Simberg D. Delivery of a model lipophilic membrane cargo to bone marrow via cell-derived microparticles. J Control Release 2020; 326:324-334. [PMID: 32682903 DOI: 10.1016/j.jconrel.2020.07.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/26/2020] [Accepted: 07/13/2020] [Indexed: 12/11/2022]
Abstract
Bone marrow (BM) is the central immunological organ and the origin of hematological diseases. Efficient and specific drug delivery to the BM is an unmet need. We tested delivery of fluorescent indocarbocyanine lipids (ICLs, DiR, DiD, DiI) as a model lipophilic cargo, via different carriers. Systemically injected T-lymphocyte cell line Jurkat delivered ICLs to the BM more efficiently than erythrocytes, and more selectively than PEGylated liposomes. Near infrared imaging showed that the delivery was restricted to the BM, lungs, liver and spleen, with no accumulation in the kidneys, brain, heart, intestines, fat tissue and pancreas. Following systemic injection of ICL-labeled cells in immunodeficient or immunocompetent mice, few cells arrived in the BM intact. However, between 5 and 10% of BM cells were ICL-positive. Confocal microscopy of intact BM confirmed that ICLs are delivered independently of the injected cells. Flow cytometry analysis showed that the lipid accumulated in both CD11b + and CD11b- cells, and in hematopoietic progenitors. In a xenograft model of acute myeloid leukemia, a single injection of 10 million Jurkat cells delivered DiD to ~15% of the tumor cells. ICL-labeled cells disappeared from blood almost immediately post-intravenous injection, but numerous cell-derived microparticles continued to circulate in blood. The microparticle particle formation was not due to the ICL labeling or complement attack and was observed after injection of both syngeneic and xenogeneic cells. Injection of microparticles produced in vitro from Jurkat cells resulted in a similar ICL delivery as the injection of intact Jurkat cells. Our results demonstrate a novel delivery paradigm wherein systemically injected cells release microparticles that accumulate in the BM. In addition, the results have important implications for studies involving systemically administered cell therapies.
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Affiliation(s)
- Chunyan Yang
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China; The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Fangfang Chen
- China-Japan Union Hospital of Jilin University, Changchun, Jilin, China; The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
| | - Ping Ren
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Laren Lofchy
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Chun Wan
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, CO 80309, USA
| | - Jingshi Shen
- Department of Molecular, Cellular and Developmental Biology, University of Colorado Boulder, CO 80309, USA
| | - Guankui Wang
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Hanmant Gaikwad
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Jessica Ponder
- Division of Hematology, Department of Medicine, University of Colorado School of Medicine, Aurora, CO, USA
| | - Craig T Jordan
- Division of Hematology, Department of Medicine, University of Colorado School of Medicine, Aurora, CO, USA
| | - Robert Scheinman
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Dmitri Simberg
- The Skaggs School of Pharmacy and Pharmaceutical Sciences, Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus, Aurora, CO, USA.
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19
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Balise VD, Saito-Reis CA, Gillette JM. Tetraspanin Scaffold Proteins Function as Key Regulators of Hematopoietic Stem Cells. Front Cell Dev Biol 2020; 8:598. [PMID: 32754593 PMCID: PMC7381308 DOI: 10.3389/fcell.2020.00598] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 06/19/2020] [Indexed: 02/06/2023] Open
Abstract
Hematopoietic stem and progenitor cells (HSPCs) are responsible for the development, maintenance, and regeneration of all the blood forming cells in the body, and as such, are critical for a number of patient therapies. For successful HSPC transplantation, stem cells must traffic through the blood and home to the bone marrow (BM) microenvironment or “niche,” which is composed of soluble factors, matrix proteins, and supportive cells. HSPC adhesion to, and signaling with, cellular and extracellular components of the niche provide instructional cues to balance stem cell self-renewal and differentiation. In this review, we will explore the regulation of these stem cell properties with a focus on the tetraspanin family of membrane proteins. Tetraspanins are molecular scaffolds that uniquely function to distribute proteins into highly organized microdomains comprising adhesion, signaling, and adaptor proteins. As such, tetraspanins contribute to many aspects of cell physiology as mediators of cell adhesion, trafficking, and signaling. We will summarize the many reports that identify tetraspanins as markers of specific HSPC populations. Moreover, we will discuss the various studies establishing the functional importance of tetraspanins in the regulation of essential HSPC processes including quiescence, migration, and niche adhesion. When taken together, studies outlined in this review suggest that several tetraspanins may serve as potential targets to modulate HSPC interactions with the BM niche, ultimately impacting future HSPC therapies.
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Affiliation(s)
- Victoria D Balise
- Department of Pathology, University of New Mexico Health Sciences Center, Albuquerque, NM, United States
| | - Chelsea A Saito-Reis
- Department of Pathology, University of New Mexico Health Sciences Center, Albuquerque, NM, United States
| | - Jennifer M Gillette
- Department of Pathology, University of New Mexico Health Sciences Center, Albuquerque, NM, United States.,Comprehensive Cancer Center, The University of New Mexico, Albuquerque, NM, United States
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20
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Cellular census of human fibrosis defines functionally distinct stromal cell types and states. Nat Commun 2020; 11:2768. [PMID: 32488016 PMCID: PMC7265502 DOI: 10.1038/s41467-020-16264-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 04/20/2020] [Indexed: 12/14/2022] Open
Abstract
Fibrotic disorders are some of the most devastating and poorly treated conditions in developed nations, yet effective therapeutics are not identified for many of them. A major barrier for the identification of targets and successful clinical translation is a limited understanding of the human fibrotic microenvironment. Here, we construct a stromal cell atlas of human fibrosis at single cell resolution from patients with Dupuytren’s disease, a localized fibrotic condition of the hand. A molecular taxonomy of the fibrotic milieu characterises functionally distinct stromal cell types and states, including a subset of immune regulatory ICAM1+ fibroblasts. In developing fibrosis, myofibroblasts exist along an activation continuum of phenotypically distinct populations. We also show that the tetraspanin CD82 regulates cell cycle progression and can be used as a cell surface marker of myofibroblasts. These findings have important implications for targeting core pathogenic drivers of human fibrosis. New anti-fibrotics aided by a better understanding of fibrotic cell subsets and their functions are needed. Here the authors perform single-cell RNA-seq and CyTOF on nodules from patients with Dupuytren’s disease to map subsets and the state of mesenchymal cells during pathogenic fibrogenesis.
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21
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Neviani V, van Deventer S, Wörner TP, Xenaki KT, van de Waterbeemd M, Rodenburg RNP, Wortel IMN, Kuiper JK, Huisman S, Granneman J, van Bergen En Henegouwen PMP, Heck AJR, van Spriel AB, Gros P. Site-specific functionality and tryptophan mimicry of lipidation in tetraspanin CD9. FEBS J 2020; 287:5323-5344. [PMID: 32181977 PMCID: PMC7818406 DOI: 10.1111/febs.15295] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 01/19/2020] [Accepted: 03/13/2020] [Indexed: 12/18/2022]
Abstract
Lipidation of transmembrane proteins regulates many cellular activities, including signal transduction, cell–cell communication, and membrane trafficking. However, how lipidation at different sites in a membrane protein affects structure and function remains elusive. Here, using native mass spectrometry we determined that wild‐type human tetraspanins CD9 and CD81 exhibit nonstochastic distributions of bound acyl chains. We revealed CD9 lipidation at its three most frequent lipidated sites suffices for EWI‐F binding, while cysteine‐to‐alanine CD9 mutations markedly reduced binding of EWI‐F. EWI‐F binding by CD9 was rescued by mutating all or, albeit to a lesser extent, only the three most frequently lipidated sites into tryptophans. These mutations did not affect the nanoscale distribution of CD9 in cell membranes, as shown by super‐resolution microscopy using a CD9‐specific nanobody. Thus, these data demonstrate site‐specific, possibly conformation‐dependent, functionality of lipidation in tetraspanin CD9 and identify tryptophan mimicry as a possible biochemical approach to study site‐specific transmembrane‐protein lipidation.
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Affiliation(s)
- Viviana Neviani
- Crystal and Structural Chemistry, Department of Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, The Netherlands
| | - Sjoerd van Deventer
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud UMC, Nijmegen, The Netherlands
| | - Tobias P Wörner
- Biomolecular Mass Spectrometry and Proteomics, Department of Chemistry, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, The Netherlands
| | - Katerina T Xenaki
- Cell Biology, Department of Biology, Utrecht University, The Netherlands
| | - Michiel van de Waterbeemd
- Biomolecular Mass Spectrometry and Proteomics, Department of Chemistry, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, The Netherlands
| | - Remco N P Rodenburg
- Crystal and Structural Chemistry, Department of Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, The Netherlands
| | - Inge M N Wortel
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud UMC, Nijmegen, The Netherlands
| | - Jeroen K Kuiper
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud UMC, Nijmegen, The Netherlands
| | - Sofie Huisman
- Crystal and Structural Chemistry, Department of Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, The Netherlands
| | - Joke Granneman
- Crystal and Structural Chemistry, Department of Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, The Netherlands
| | | | - Albert J R Heck
- Biomolecular Mass Spectrometry and Proteomics, Department of Chemistry, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, The Netherlands
| | - Annemiek B van Spriel
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud UMC, Nijmegen, The Netherlands
| | - Piet Gros
- Crystal and Structural Chemistry, Department of Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, The Netherlands
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22
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Dahmane S, Doucet C, Le Gall A, Chamontin C, Dosset P, Murcy F, Fernandez L, Salas D, Rubinstein E, Mougel M, Nollmann M, Milhiet PE. Nanoscale organization of tetraspanins during HIV-1 budding by correlative dSTORM/AFM. NANOSCALE 2019; 11:6036-6044. [PMID: 30869094 DOI: 10.1039/c8nr07269h] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Membrane partition and remodeling play a key role in numerous cell mechanisms, especially in viral replication cycles where viruses subvert the plasma membrane to enter and escape from the host cell. Specifically assembly and release of HIV-1 particles require specific cellular components, which are recruited to the egress site by the viral protein Gag. We previously demonstrated that HIV-1 assembly alters both partitioning and dynamics of the tetraspanins CD9 and CD81, which are key players in many infectious processes, forming enriched areas where the virus buds. In this study we correlated super resolution microscopy mapping of tetraspanins with membrane topography delineated by atomic force microscopy (AFM) in Gag-expressing cells. We revealed that CD9 is specifically trapped within the nascent viral particles, especially at buds tips, suggesting that Gag mediates CD9 and CD81 depletion from the plasma membrane. In addition, we showed that CD9 is organized as small membrane assemblies of few tens of nanometers that can coalesce upon Gag expression.
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Affiliation(s)
- Selma Dahmane
- Centre de Biochimie Structurale (CBS), INSERM, CNRS, Univ Montpellier, France.
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23
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Murru L, Moretto E, Martano G, Passafaro M. Tetraspanins shape the synapse. Mol Cell Neurosci 2018; 91:76-81. [DOI: 10.1016/j.mcn.2018.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/29/2018] [Accepted: 04/01/2018] [Indexed: 01/01/2023] Open
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24
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Saito-Reis CA, Marjon KD, Pascetti EM, Floren M, Gillette JM. The tetraspanin CD82 regulates bone marrow homing and engraftment of hematopoietic stem and progenitor cells. Mol Biol Cell 2018; 29:2946-2958. [PMID: 30133344 PMCID: PMC6329911 DOI: 10.1091/mbc.e18-05-0305] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Hematopoietic stem and progenitor cell (HSPC) transplantation represents a treatment option for patients with malignant and nonmalignant hematological diseases. Initial steps in transplantation involve the bone marrow homing and engraftment of peripheral blood–injected HSPCs. In recent work, we identified the tetraspanin CD82 as a potential regulator of HSPC homing to the bone marrow, although its mechanism remains unclear. In the present study, using a CD82 knockout (CD82KO) mouse model, we determined that CD82 modulates HSPC bone marrow maintenance, homing, and engraftment. Bone marrow characterization identified a significant decrease in the number of long-term hematopoietic stem cells in the CD82KO mice, which we linked to cell cycle activation and reduced stem cell quiescence. Additionally, we demonstrate that CD82 deficiency disrupts bone marrow homing and engraftment, with in vitro analysis identifying further defects in migration and cell spreading. Moreover, we find that the CD82KO HSPC homing defect is due at least in part to the hyperactivation of Rac1, as Rac1 inhibition rescues homing capacity. Together, these data provide evidence that CD82 is an important regulator of HSPC bone marrow maintenance, homing, and engraftment and suggest exploiting the CD82 scaffold as a therapeutic target for improved efficacy of stem cell transplants.
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Affiliation(s)
- Chelsea A Saito-Reis
- Department of Pathology, University of New Mexico Health Science Center, University of New Mexico, Albuquerque, NM 87131
| | - Kristopher D Marjon
- Department of Pathology, University of New Mexico Health Science Center, University of New Mexico, Albuquerque, NM 87131
| | - Erica M Pascetti
- Department of Pathology, University of New Mexico Health Science Center, University of New Mexico, Albuquerque, NM 87131
| | - Muskan Floren
- Department of Pathology, University of New Mexico Health Science Center, University of New Mexico, Albuquerque, NM 87131
| | - Jennifer M Gillette
- Department of Pathology, University of New Mexico Health Science Center, University of New Mexico, Albuquerque, NM 87131
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25
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Brandsma AM, Schwartz SL, Wester MJ, Valley CC, Blezer GLA, Vidarsson G, Lidke KA, Ten Broeke T, Lidke DS, Leusen JHW. Mechanisms of inside-out signaling of the high-affinity IgG receptor FcγRI. Sci Signal 2018; 11:11/540/eaaq0891. [PMID: 30042128 DOI: 10.1126/scisignal.aaq0891] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Fc receptors (FcRs) are an important bridge between the innate and adaptive immune system. Fc gamma receptor I (FcγRI; CD64), the high-affinity receptor for immunoglobulin G (IgG), plays roles in inflammation, autoimmune responses, and immunotherapy. Stimulation of myeloid cells with cytokines, such as tumor necrosis factor-α ( TNFα) and interferon-γ ( IFNγ), increases the binding of FcγRI to immune complexes (ICs), such as antibody-opsonized pathogens or tumor cells, through a process known as "inside-out" signaling. Using super-resolution imaging, we found that stimulation of cells with IL-3 also enhanced the clustering of FcγRI both before and after exposure to ICs. This increased clustering was dependent on an intact actin cytoskeleton. We found that chemical inhibition of the activity of the phosphatase PP1 reduced FcγRI inside-out signaling, although the phosphorylation of FcγRI itself was unaffected. Furthermore, the antibody-dependent cytotoxic activity of human neutrophils toward CD20-expressing tumor cells was increased after stimulation with TNFα and IFNγ. These results suggest that nanoscale reorganization of FcγRI, stimulated by cytokine-induced, inside-out signaling, enhances FcγRI cellular effector functions.
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Affiliation(s)
- Arianne M Brandsma
- Immunotherapy Laboratory, Laboratory for Translational Immunology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Samantha L Schwartz
- Department of Pathology and Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM 87102, USA
| | - Michael J Wester
- Department of Pathology and Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM 87102, USA
| | - Christopher C Valley
- Department of Pathology and Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM 87102, USA
| | - Gittan L A Blezer
- Immunotherapy Laboratory, Laboratory for Translational Immunology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Gestur Vidarsson
- Sanquin Research and Landsteiner Laboratory, Department of Experimental Hematology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Keith A Lidke
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM 87131, USA
| | - Toine Ten Broeke
- Immunotherapy Laboratory, Laboratory for Translational Immunology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Diane S Lidke
- Department of Pathology and Comprehensive Cancer Center, University of New Mexico, Albuquerque, NM 87102, USA
| | - Jeanette H W Leusen
- Immunotherapy Laboratory, Laboratory for Translational Immunology, University Medical Center Utrecht, Utrecht, Netherlands.
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26
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Yeung L, Hickey MJ, Wright MD. The Many and Varied Roles of Tetraspanins in Immune Cell Recruitment and Migration. Front Immunol 2018; 9:1644. [PMID: 30072994 PMCID: PMC6060431 DOI: 10.3389/fimmu.2018.01644] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Accepted: 07/04/2018] [Indexed: 01/13/2023] Open
Abstract
Immune cell recruitment and migration is central to the normal functioning of the immune system in health and disease. Numerous adhesion molecules on immune cells and the parenchymal cells they interact with are well recognized for their roles in facilitating the movements of immune cells throughout the body. A growing body of evidence now indicates that tetraspanins, proteins known for their capacity to organize partner molecules within the cell membrane, also have significant impacts on the ability of immune cells to migrate around the body. In this review, we examine the tetraspanins expressed by immune cells and endothelial cells that influence leukocyte recruitment and motility and describe their impacts on the function of adhesion molecules and other partner molecules that modulate the movements of leukocytes. In particular, we examine the functional roles of CD9, CD37, CD63, CD81, CD82, and CD151. This reveals the diversity of the functions of the tetraspanin family in this setting, both in the nature of adhesive and migratory interactions that they regulate, and the positive or inhibitory effects mediated by the individual tetraspanin proteins.
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Affiliation(s)
- Louisa Yeung
- Centre for Inflammatory Diseases, Department of Medicine, Monash Medical Centre, Monash University, Clayton, VIC, Australia.,Department of Immunology, Monash University, Prahran, VIC, Australia
| | - Michael J Hickey
- Centre for Inflammatory Diseases, Department of Medicine, Monash Medical Centre, Monash University, Clayton, VIC, Australia
| | - Mark D Wright
- Department of Immunology, Monash University, Prahran, VIC, Australia
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27
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Liprin-α1 modulates cancer cell signaling by transmembrane protein CD82 in adhesive membrane domains linked to cytoskeleton. Cell Commun Signal 2018; 16:41. [PMID: 30005669 PMCID: PMC6045882 DOI: 10.1186/s12964-018-0253-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 07/10/2018] [Indexed: 12/26/2022] Open
Abstract
Background PPFIA1 is located at the 11q13 region commonly amplified in cancer. The protein liprin-α1 encoded by PPF1A1 contributes to the adhesive and invasive structures of cytoskeletal elements and is located at the invadosomes in cancer cells. However, the precise mechanism of liprin-α1 function in cancer progression has remained elusive. Methods Invasion regulating activity of liprin-α1 was examined by analyzing the functions of squamous cell carcinoma of head and neck (HNSCC) cell lines in three-dimensional collagen I after RNAi mediated gene knockdown. Transcriptome profiling and Gene Set Enrichment Analysis from HNSCC and breast cancer cells were used to identify expression changes relevant to specific cellular localizations, biological processes and signaling pathways after PPFIA1 knockdown. The significance of the results was assessed by relevant statistical methods (Wald and Benjamini-Hochberg). Localization of proteins associated to liprin-α1 was studied by immunofluorescence in 2D and 3D conditions. The association of PPFIA1 amplification to HNSCC patient survival was explored using The Cancer Genome Atlas data. Results In this study, we show that liprin-α1 regulates biological processes related to membrane microdomains in breast carcinoma, as well as protein trafficking, cell-cell and cell-substrate contacts in HNSCC cell lines cultured in three-dimensional matrix. Importantly, we show that in all these cancer cells liprin-α1 knockdown leads to the upregulation of transmembrane protein CD82, which is a suppressor of metastasis in several solid tumors. Conclusions Our results provide novel information regarding the function of liprin-α1 in biological processes essential in cancer progression. The results reveal liprin-α1 as a novel regulator of CD82, linking liprin-α1 to the cancer cell invasion and metastasis pathways. Electronic supplementary material The online version of this article (10.1186/s12964-018-0253-y) contains supplementary material, which is available to authorized users.
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28
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Heterocellular molecular contacts in the mammalian stem cell niche. Eur J Cell Biol 2018; 97:442-461. [PMID: 30025618 DOI: 10.1016/j.ejcb.2018.07.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 07/03/2018] [Indexed: 12/16/2022] Open
Abstract
Adult tissue homeostasis and repair relies on prompt and appropriate intervention by tissue-specific adult stem cells (SCs). SCs have the ability to self-renew; upon appropriate stimulation, they proliferate and give rise to specialized cells. An array of environmental signals is important for maintenance of the SC pool and SC survival, behavior, and fate. Within this special microenvironment, commonly known as the stem cell niche (SCN), SC behavior and fate are regulated by soluble molecules and direct molecular contacts via adhesion molecules providing connections to local supporting cells and the extracellular matrix. Besides the extensively discussed array of soluble molecules, the expression of adhesion molecules and molecular contacts is another fundamental mechanism regulating niche occupancy and SC mobilization upon activation. Some adhesion molecules are differentially expressed and have tissue-specific consequences, likely reflecting the structural differences in niche composition and design, especially the presence or absence of a stromal counterpart. However, the distribution and identity of intercellular molecular contacts for adhesion and adhesion-mediated signaling within stromal and non-stromal SCN have not been thoroughly studied. This review highlights common details or significant differences in cell-to-cell contacts within representative stromal and non-stromal niches that could unveil new standpoints for stem cell biology and therapy.
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29
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Thomson-Luque R, Wang C, Ntumngia FB, Xu S, Szekeres K, Conway A, Adapa SR, Barnes SJ, Adams JH, Jiang RHY. In-depth phenotypic characterization of reticulocyte maturation using mass cytometry. Blood Cells Mol Dis 2018; 72:22-33. [PMID: 30007855 PMCID: PMC6097872 DOI: 10.1016/j.bcmd.2018.06.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/24/2018] [Accepted: 06/24/2018] [Indexed: 12/17/2022]
Abstract
Progress towards an in-depth understanding of the final steps of the erythroid lineage development is paramount for many hematological diseases. We have characterized the final stages of reticulocyte maturation from bone marrow to peripheral blood using for the first time single-cell Mass Cytometry (CyTOF). We were able to measure the expression of 31 surface markers within a single red blood cell (RBC). We demonstrate the validity of CyTOF for RBC phenotyping by confirming the progressive reduction of transferrin receptor 1 (CD71) during reticulocyte maturation to mature RBC. We highlight the high-dimensional nature of mass cytometry data by correlating the expression of multiple proteins on individual RBCs. We further describe a more drastic reduction pattern for a component of the alpha4/beta1 integrin CD49d at the very early steps of reticulocyte maturation in bone marrow and directly linked with the mitochondria remnants clearance pattern. The enhanced and accurate RBC phenotyping potential of CyTOF described herein could be beneficial to decipher RBC preferences, as well as still not well understood receptor-ligand interaction of some hemotropic parasites such as the malaria causing agent Plasmodium vivax.
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Affiliation(s)
- Richard Thomson-Luque
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, USA
| | - Chengqi Wang
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, USA
| | - Francis B Ntumngia
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, USA
| | - Shulin Xu
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, USA
| | - Karoly Szekeres
- Department of Molecular Medicine, Morsani College of Medicine, University of South Florida, Tampa, USA
| | - Amy Conway
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, USA
| | - Swamy Rakesh Adapa
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, USA
| | - Samantha J Barnes
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, USA
| | - John H Adams
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, USA.
| | - Rays H Y Jiang
- Center for Global Health and Infectious Diseases Research, College of Public Health, University of South Florida, Tampa, USA.
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30
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Brzozowski JS, Bond DR, Jankowski H, Goldie BJ, Burchell R, Naudin C, Smith ND, Scarlett CJ, Larsen MR, Dun MD, Skelding KA, Weidenhofer J. Extracellular vesicles with altered tetraspanin CD9 and CD151 levels confer increased prostate cell motility and invasion. Sci Rep 2018; 8:8822. [PMID: 29891991 PMCID: PMC5995928 DOI: 10.1038/s41598-018-27180-z] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 05/25/2018] [Indexed: 02/06/2023] Open
Abstract
To facilitate intercellular communication, cells release nano-sized, extracellular vesicles (EVs) to transfer biological cargo to both local and distant sites. EVs are enriched in tetraspanins, two of which (CD9 and CD151) have altered expression patterns in many solid tumours, including prostate cancer, as they advance toward metastasis. We aimed to determine whether EVs from prostate cells with altered CD9 and CD151 expression could influence cellular behaviour and increase the metastatic capabilities of non-tumourigenic prostate cells. EVs were isolated by ultrafiltration and characterised for their tetraspanin expression and size distribution. iTRAQ was used to identify differences between RWPE1 and tetraspanin-modified RWPE1 EV proteomes, showing an enrichment in protein degradation pathways. Addition of EVs from RWPE1 cells with reduced CD9 or increased CD151 abundance resulted in increased invasion of RWPE1 cells, and increased migration in the case of high CD151 abundance. We have been able to show that alteration of CD9 and CD151 on prostate cells alters the proteome of their resultant EVs, and that these EVs can enhance the migratory and invasive capabilities of a non-tumourigenic prostate cellular population. This work suggests that cellular tetraspanin levels can alter EVs, potentially acting as a driver of metastasis in prostate cancer.
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Affiliation(s)
- Joshua S Brzozowski
- Cancer Research Program, Hunter Medical Research Institute, New Lambton, NSW, Australia.,School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia
| | - Danielle R Bond
- Cancer Research Program, Hunter Medical Research Institute, New Lambton, NSW, Australia.,School of Environmental and Life Sciences, The University of Newcastle, Ourimbah, NSW, Australia
| | - Helen Jankowski
- Cancer Research Program, Hunter Medical Research Institute, New Lambton, NSW, Australia.,School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia
| | - Belinda J Goldie
- Cancer Research Program, Hunter Medical Research Institute, New Lambton, NSW, Australia.,Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
| | - Rachel Burchell
- Cancer Research Program, Hunter Medical Research Institute, New Lambton, NSW, Australia.,School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia
| | - Crystal Naudin
- School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia.,Emory University, Atlanta, Georgia, USA
| | - Nathan D Smith
- ABRF, Research Services, University of Newcastle, Callaghan, NSW, Australia
| | - Christopher J Scarlett
- Cancer Research Program, Hunter Medical Research Institute, New Lambton, NSW, Australia.,School of Environmental and Life Sciences, The University of Newcastle, Ourimbah, NSW, Australia
| | - Martin R Larsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
| | - Matthew D Dun
- Cancer Research Program, Hunter Medical Research Institute, New Lambton, NSW, Australia.,School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia
| | - Kathryn A Skelding
- Cancer Research Program, Hunter Medical Research Institute, New Lambton, NSW, Australia.,School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia
| | - Judith Weidenhofer
- Cancer Research Program, Hunter Medical Research Institute, New Lambton, NSW, Australia. .,School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia.
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31
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Florin L, Lang T. Tetraspanin Assemblies in Virus Infection. Front Immunol 2018; 9:1140. [PMID: 29887866 PMCID: PMC5981178 DOI: 10.3389/fimmu.2018.01140] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 05/07/2018] [Indexed: 12/23/2022] Open
Abstract
Tetraspanins (Tspans) are a family of four-span transmembrane proteins, known as plasma membrane “master organizers.” They form Tspan-enriched microdomains (TEMs or TERMs) through lateral association with one another and other membrane proteins. If multiple microdomains associate with each other, larger platforms can form. For infection, viruses interact with multiple cell surface components, including receptors, activating proteases, and signaling molecules. It appears that Tspans, such as CD151, CD82, CD81, CD63, CD9, Tspan9, and Tspan7, coordinate these associations by concentrating the interacting partners into Tspan platforms. In addition to mediating viral attachment and entry, these platforms may also be involved in intracellular trafficking of internalized viruses and assist in defining virus assembly and exit sites. In conclusion, Tspans play a role in viral infection at different stages of the virus replication cycle. The present review highlights recently published data on this topic, with a focus on events at the plasma membrane. In light of these findings, we propose a model for how Tspan interactions may organize cofactors for viral infection into distinct molecular platforms.
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Affiliation(s)
- Luise Florin
- Department of Medical Microbiology and Hygiene, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
| | - Thorsten Lang
- Department of Membrane Biochemistry, Life & Medical Sciences Institute, University of Bonn, Bonn, Germany
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32
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Gao C, Peng S, Feng P, Shuai C. Bone biomaterials and interactions with stem cells. Bone Res 2017; 5:17059. [PMID: 29285402 PMCID: PMC5738879 DOI: 10.1038/boneres.2017.59] [Citation(s) in RCA: 334] [Impact Index Per Article: 47.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 10/15/2017] [Accepted: 10/23/2017] [Indexed: 12/31/2022] Open
Abstract
Bone biomaterials play a vital role in bone repair by providing the necessary substrate for cell adhesion, proliferation, and differentiation and by modulating cell activity and function. In past decades, extensive efforts have been devoted to developing bone biomaterials with a focus on the following issues: (1) developing ideal biomaterials with a combination of suitable biological and mechanical properties; (2) constructing a cell microenvironment with pores ranging in size from nanoscale to submicro- and microscale; and (3) inducing the oriented differentiation of stem cells for artificial-to-biological transformation. Here we present a comprehensive review of the state of the art of bone biomaterials and their interactions with stem cells. Typical bone biomaterials that have been developed, including bioactive ceramics, biodegradable polymers, and biodegradable metals, are reviewed, with an emphasis on their characteristics and applications. The necessary porous structure of bone biomaterials for the cell microenvironment is discussed, along with the corresponding fabrication methods. Additionally, the promising seed stem cells for bone repair are summarized, and their interaction mechanisms with bone biomaterials are discussed in detail. Special attention has been paid to the signaling pathways involved in the focal adhesion and osteogenic differentiation of stem cells on bone biomaterials. Finally, achievements regarding bone biomaterials are summarized, and future research directions are proposed.
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Affiliation(s)
- Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
| | - Shuping Peng
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, Xiangya Hospital, Central South University, Changsha, China
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, China
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
| | - Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
- Jiangxi University of Science and Technology, Ganzhou, China
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan Province, Xiangya Hospital, Central South University, Changsha, China
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33
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Termini CM, Gillette JM. Tetraspanins Function as Regulators of Cellular Signaling. Front Cell Dev Biol 2017; 5:34. [PMID: 28428953 PMCID: PMC5382171 DOI: 10.3389/fcell.2017.00034] [Citation(s) in RCA: 183] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 03/22/2017] [Indexed: 01/10/2023] Open
Abstract
Tetraspanins are molecular scaffolds that distribute proteins into highly organized microdomains consisting of adhesion, signaling, and adaptor proteins. Many reports have identified interactions between tetraspanins and signaling molecules, finding unique downstream cellular consequences. In this review, we will explore these interactions as well as the specific cellular responses to signal activation, focusing on tetraspanin regulation of adhesion-mediated (integrins/FAK), receptor-mediated (EGFR, TNF-α, c-Met, c-Kit), and intracellular signaling (PKC, PI4K, β-catenin). Additionally, we will summarize our current understanding for how tetraspanin post-translational modifications (palmitoylation, N-linked glycosylation, and ubiquitination) can regulate signal propagation. Many of the studies outlined in this review suggest that tetraspanins offer a potential therapeutic target to modulate aberrant signal transduction pathways that directly impact a host of cellular behaviors and disease states.
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Affiliation(s)
- Christina M Termini
- Department of Pathology, University of New Mexico Health Sciences CenterAlbuquerque, NM, USA
| | - Jennifer M Gillette
- Department of Pathology, University of New Mexico Health Sciences CenterAlbuquerque, NM, USA
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34
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Di Giacomo V, Tian TV, Mas A, Pecoraro M, Batlle-Morera L, Noya L, Martín-Caballero J, Ruberte J, Keyes WM. ΔNp63α promotes adhesion of metastatic prostate cancer cells to the bone through regulation of CD82. Oncogene 2017; 36:4381-4392. [PMID: 28368419 PMCID: PMC5543260 DOI: 10.1038/onc.2017.42] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 01/01/2017] [Accepted: 01/19/2017] [Indexed: 12/12/2022]
Abstract
ΔNp63α is a critical mediator of epithelial development and stem cell function in a variety of tissues including the skin and breast, while overexpression of ΔNp63α acts as an oncogene to drive tumor formation and cancer stem cell properties in squamous cell carcinoma. However, with regards to the prostate, while ΔNp63α is expressed in the basal stem cells of the mature gland, during adenocarcinoma development, its expression is lost and its absence is used to clinically diagnose the malignant state. Surprisingly, here we identify a sub-population of bone metastatic prostate cancer cells in the PC3 cell line that express ΔNp63α. Interestingly, we discovered that ΔNp63α favors adhesion and stem-like growth of these cells in the bone microenvironment. In addition, we show that these properties require expression of the target gene CD82. Together, this work uncovers a population of bone metastatic prostate cancer cells that express ΔNp63α, and provides important information about the mechanisms of bone metastatic colonization. Finally, we identify metastasis-promoting properties for the tetraspanin family member CD82.
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Affiliation(s)
- V Di Giacomo
- Gene Regulation, Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - T V Tian
- Gene Regulation, Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - A Mas
- Gene Regulation, Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - M Pecoraro
- Gene Regulation, Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - L Batlle-Morera
- Gene Regulation, Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - L Noya
- Department of Animal Health and Anatomy and Center for Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Barcelona, Spain
| | | | - J Ruberte
- Department of Animal Health and Anatomy and Center for Animal Biotechnology and Gene Therapy, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - W M Keyes
- Gene Regulation, Stem Cells and Cancer Program, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain.,Development and Stem Cells program, Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS UMR7104, Inserm U964, Université de Strasbourg, Illkirch, France
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35
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Nham P, Choi JI, Hur J, Baek SH, Kim HS. Shedding light on the DARC knight as a guardian of hematopoietic stem cell quiescence. Stem Cell Investig 2017; 4:8. [PMID: 28217710 DOI: 10.21037/sci.2017.01.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 12/29/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Pniel Nham
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Korea
| | - Jae-Il Choi
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Korea
| | - Jin Hur
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Korea
| | - Sung Hee Baek
- Creative Research Initiative Center for Chromatin Dynamics, School of Biological Sciences, Seoul National University, Seoul, Korea
| | - Hyo-Soo Kim
- National Research Laboratory for Stem Cell Niche, Center for Medical Innovation, Seoul National University Hospital, Seoul, Korea;; Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Korea
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36
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Rojas-Hernandez CM, Nemunaitis J, Marjon KD, Bustamante D, Zhang QY, Gillette JM. Chronic lymphocytic leukemia with clinical debut as neurological involvement: a rare phenomenon and the need for better predictive markers. BMC HEMATOLOGY 2017; 17:3. [PMID: 28174663 PMCID: PMC5290634 DOI: 10.1186/s12878-017-0073-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 01/24/2017] [Indexed: 12/02/2022]
Abstract
Background Chronic lymphocytic leukemia (CLL) is the most common leukemia in Western countries. The frequency of symptomatic central nervous system (CNS) involvement is unknown but thought to be a rare phenomenon. Currently there are no known risk factors for CNS involvement. Case presentation We describe a clinically staged low-risk CLL case that presented with symptomatic CNS involvement and progressed rapidly to death. Evaluation of the surface adhesion molecules identified a markedly altered expression pattern of the integrin, CD49d, and the tetraspanin, CD82, in the index case when compared to similar low-risk CLL cases. We found that the early Rai clinical stage CLL patients showed linear correlation for the co-expression of CD82 and CD49d. In contrast, this unique index case with CNS involvement, which has the same Rai clinical stage, had a significantly lower expression of CD82 and higher expression of CD49d. Conclusions These data suggest that the expression profile of CD49d and CD82 may represent potential biomarkers for patients with increased propensity of CNS involvement. Moreover, this study illustrates the critical need for a better mechanistic understanding of how specific adhesion proteins regulate the interactions between CLL cells and various tissue sites.
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Affiliation(s)
| | - Jacklyn Nemunaitis
- Department of Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM USA
| | - Kristopher D Marjon
- Department of Pathology, University of New Mexico Health Sciences Center, Albuquerque, NM USA
| | - Daniel Bustamante
- Department of Pathology, University of New Mexico Health Sciences Center, Albuquerque, NM USA
| | - Qian-Yun Zhang
- Department of Pathology, University of New Mexico Health Sciences Center, Albuquerque, NM USA
| | - Jennifer M Gillette
- Department of Pathology, University of New Mexico Health Sciences Center, Albuquerque, NM USA
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Influence of Plasma Cell Niche Factors on the Recruitment and Maintenance of IRF4hi Plasma Cells and Plasmablasts in Vaccinated, Simian Immunodeficiency Virus-Infected Rhesus Macaques with Low and High Viremia. J Virol 2017; 91:JVI.01727-16. [PMID: 27928009 DOI: 10.1128/jvi.01727-16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 11/29/2016] [Indexed: 12/30/2022] Open
Abstract
In a recent study, we found that protection following simian immunodeficiency virus (SIV) exposure correlated with rectal plasma cell frequency in vaccinated female rhesus macaques. We sought to determine if the same macaques maintained high mucosal plasma cell frequencies postinfection and if this translated to reduced viremia. Although delayed SIV acquisition did not predict subsequent viral control, alterations existed in the distribution of plasma cells and plasmablasts between macaques that exhibited high or low viremia. Flow cytometric analysis of cells from rectal biopsy specimens, bone marrow, and mesenteric lymph nodes of vaccinated infected, unvaccinated infected, and uninfected macaques identified two main IRF4hi subsets of interest: CD138+ plasma cells, and CD138- plasmablasts. In rectal tissue, plasma cell frequency positively correlated with plasma viremia and unvaccinated macaques had increased plasma cells and plasmablasts compared to vaccinated animals. Likewise, plasmablast frequency in the mesenteric lymph node correlated with viremia. However, in bone marrow, plasmablast frequency negatively correlated with viremia. Accordingly, low-viremic macaques had a higher frequency of both bone marrow IRF4hi subsets than did animals with high viremia. Significant reciprocal relationships between rectal and bone marrow plasmablasts suggested that efficient trafficking to the bone marrow as opposed to the rectal mucosa was linked to viral control. mRNA expression analysis of proteins involved in establishment of plasma cell niches in sorted bone marrow and rectal cell populations further supported this model and revealed differential mRNA expression patterns in these tissues. IMPORTANCE As key antibody producers, plasma cells and plasmablasts are critical components of vaccine-induced immunity to human immunodeficiency virus type 1 (HIV-1) in humans and SIV in the macaque model; however, few have attempted to examine the role of these cells in viral suppression postinfection. Our results suggest that plasmablast trafficking to and retention in the bone marrow play a previously unappreciated role in viral control and contrast the potential contribution of mucosal plasma cells to mediate protection at sites of infection with that of bone marrow plasmablasts and plasma cells to control viremia during chronic infection. Manipulation of niche factors influencing the distribution and maintenance of these critical antibody-secreting cells may serve as potential therapeutic targets to enhance antiviral responses postvaccination and postinfection.
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38
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Homsi Y, Lang T. The specificity of homomeric clustering of CD81 is mediated by its δ-loop. FEBS Open Bio 2017; 7:274-283. [PMID: 28174692 PMCID: PMC5292664 DOI: 10.1002/2211-5463.12187] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 12/07/2016] [Accepted: 12/14/2016] [Indexed: 01/26/2023] Open
Abstract
Tetraspanins are cell membrane‐scaffolding proteins interacting with one another and a repertoire of interaction partners. Through these interactions, they form extended molecular networks as tetraspanin webs or tetraspanin‐enriched microdomains. Microscopic data suggest that these networks contain tetraspanin clusters, with poor overlap between clusters formed by different tetraspanins. Here, we investigate the possibility of targeting tetraspanins CD9 or CD151 to clusters formed by the tetraspanin CD81. We find that the δ‐loop from the large extracellular domain of CD81 is sufficient for targeting of CD9/CD151 to CD81 clusters. Moreover, in a pull‐down assay, CD9 coprecipitates more CD81 when it carries the CD81 δ‐loop. In conclusion, the information for forming homomeric CD81 clusters is encoded in the δ‐loop.
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Affiliation(s)
- Yahya Homsi
- Membrane Biochemistry Life & Medical Sciences (LIMES) Institute University of Bonn Germany
| | - Thorsten Lang
- Membrane Biochemistry Life & Medical Sciences (LIMES) Institute University of Bonn Germany
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39
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Li Y, Qi B. Progress toward Understanding Protein S-acylation: Prospective in Plants. FRONTIERS IN PLANT SCIENCE 2017; 8:346. [PMID: 28392791 PMCID: PMC5364179 DOI: 10.3389/fpls.2017.00346] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Accepted: 02/28/2017] [Indexed: 05/02/2023]
Abstract
S-acylation, also known as S-palmitoylation or palmitoylation, is a reversible post-translational lipid modification in which long chain fatty acid, usually the 16-carbon palmitate, covalently attaches to a cysteine residue(s) throughout the protein via a thioester bond. It is involved in an array of important biological processes during growth and development, reproduction and stress responses in plant. S-acylation is a ubiquitous mechanism in eukaryotes catalyzed by a family of enzymes called Protein S-Acyl Transferases (PATs). Since the discovery of the first PAT in yeast in 2002 research in S-acylation has accelerated in the mammalian system and followed by in plant. However, it is still a difficult field to study due to the large number of PATs and even larger number of putative S-acylated substrate proteins they modify in each genome. This is coupled with drawbacks in the techniques used to study S-acylation, leading to the slower progress in this field compared to protein phosphorylation, for example. In this review we will summarize the discoveries made so far based on knowledge learnt from the characterization of protein S-acyltransferases and the S-acylated proteins, the interaction mechanisms between PAT and its specific substrate protein(s) in yeast and mammals. Research in protein S-acylation and PATs in plants will also be covered although this area is currently less well studied in yeast and mammalian systems.
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40
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Pérez-Fernández A, Hernández-Hernández Á. The DARC-CD82 axis discloses bone marrow macrophages as guardians of long-term hematopoietic stem cells quiescence. Stem Cell Investig 2016; 3:44. [PMID: 27668251 DOI: 10.21037/sci.2016.08.07] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 08/24/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Alejandro Pérez-Fernández
- Department of Biochemistry and Molecular Biology, University of Salamanca (USAL), Institute for Biomedical Research of Salamanca (IBSAL), Salamanca, Spain
| | - Ángel Hernández-Hernández
- Department of Biochemistry and Molecular Biology, University of Salamanca (USAL), Institute for Biomedical Research of Salamanca (IBSAL), Salamanca, Spain
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41
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MacNamara KC. Shedding light on HSC dormancy-a role for the DARC. Stem Cell Investig 2016; 3:40. [PMID: 27668247 DOI: 10.21037/sci.2016.08.06] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Accepted: 08/10/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Katherine C MacNamara
- Department of Immunology and Microbial Disease, Albany Medical College, 47 New Scotland Avenue, Albany, NY 12208, USA
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42
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Feng J, Huang C, Wren JD, Wang DW, Yan J, Zhang J, Sun Y, Han X, Zhang XA. Tetraspanin CD82: a suppressor of solid tumors and a modulator of membrane heterogeneity. Cancer Metastasis Rev 2016; 34:619-33. [PMID: 26335499 DOI: 10.1007/s10555-015-9585-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Tetraspanin CD82 suppresses the progression and metastasis of a wide range of solid malignant tumors. However, its roles in tumorigenesis and hematopoietic malignancy remain unclear. Ubiquitously expressed CD82 restrains cell migration and cell invasion by modulating both cell-matrix and cell-cell adhesiveness and confining outside-in pro-motility signaling. This restraint at least contributes to, if not determines, the metastasis-suppressive activity and, also likely, the physiological functions of CD82. As a modulator of cell membrane heterogeneity, CD82 alters microdomains, trafficking, and topography of the membrane by changing the membrane molecular landscape. The functional activities of membrane molecules and the cytoskeletal interaction of the cell membrane are subsequently altered, followed by changes in cellular functions. Given its pathological and physiological importance, CD82 is a promising candidate for clinically predicting and blocking tumor progression and metastasis and also an emerging model protein for mechanistically understanding cell membrane organization and heterogeneity.
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Affiliation(s)
- Jin Feng
- Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Chao Huang
- Stephenson Cancer Center and Department of Physiology, University of Oklahoma Health Sciences Center, BRC 1474, 975 NE 10th Street, Oklahoma City, OK, 73104, USA
| | - Jonathan D Wren
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Dao-Wen Wang
- Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Jizhou Yan
- Institute for Marine Biosystem and Neurosciences, Shanghai Ocean University, Shanghai, China
| | - Jiexin Zhang
- Department of Biochemistry, Nanjing Medical University, Nanjing, China
| | - Yujie Sun
- Department of Biochemistry, Nanjing Medical University, Nanjing, China
| | - Xiao Han
- Department of Biochemistry, Nanjing Medical University, Nanjing, China
| | - Xin A Zhang
- Stephenson Cancer Center and Department of Physiology, University of Oklahoma Health Sciences Center, BRC 1474, 975 NE 10th Street, Oklahoma City, OK, 73104, USA.
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43
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Termini CM, Lidke KA, Gillette JM. Tetraspanin CD82 Regulates the Spatiotemporal Dynamics of PKCα in Acute Myeloid Leukemia. Sci Rep 2016; 6:29859. [PMID: 27417454 PMCID: PMC4945921 DOI: 10.1038/srep29859] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 06/22/2016] [Indexed: 02/08/2023] Open
Abstract
Patients with acute myeloid leukemia (AML) have increased myeloid cells within their bone marrow that exhibit aberrant signaling. Therefore, therapeutic targets that modulate disrupted signaling cascades are of significant interest. In this study, we demonstrate that the tetraspanin membrane scaffold, CD82, regulates protein kinase c alpha (PKCα)-mediated signaling critical for AML progression. Utilizing a palmitoylation mutant form of CD82 with disrupted membrane organization, we find that the CD82 scaffold controls PKCα expression and activation. Combining single molecule and ensemble imaging measurements, we determine that CD82 stabilizes PKCα activation at the membrane and regulates the size of PKCα membrane clusters. Further evaluation of downstream effector signaling identified robust and sustained activation of ERK1/2 upon CD82 overexpression that results in enhanced AML colony formation. Together, these data propose a mechanism where CD82 membrane organization regulates sustained PKCα signaling that results in an aggressive leukemia phenotype. These observations suggest that the CD82 scaffold may be a potential therapeutic target for attenuating aberrant signal transduction in AML.
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Affiliation(s)
- Christina M Termini
- Department of Pathology, University of New Mexico Health Sciences Center, University of New Mexico, MSC 08-4640, Albuquerque, NM 87131, USA
| | - Keith A Lidke
- Department of Physics and Astronomy, University of New Mexico, MSC 07-4220, Albuquerque, NM 87131, USA
| | - Jennifer M Gillette
- Department of Pathology, University of New Mexico Health Sciences Center, University of New Mexico, MSC 08-4640, Albuquerque, NM 87131, USA
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44
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Zhang X, Song X, Su P, Gou M, Wang H, Liu X, Li Q. Molecular cloning, expression pattern, and phylogenetic analysis of a tetraspanin CD82-like molecule in lamprey Lampetra japonica. Dev Genes Evol 2016; 226:87-98. [PMID: 26935717 DOI: 10.1007/s00427-016-0530-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 02/09/2016] [Indexed: 11/25/2022]
Abstract
CD82, a member of the tetraspanins, is originally identified as an accessory molecule in T cell activation, and it participates in the formation of immune synapse both in T cells and antigen-presenting cells of jawed vertebrates. In the present study, a CD82 homologous complementary DNA (cDNA) sequence is identified in the lamprey Lampetra japonica. The open reading frame of this sequence is 801 bp long and encodes a 266-amino acid protein. The multialignment of this sequence with several typical CD82s and CD37s of jawed vertebrates shows that it also possesses their conserved four transmembrane domains and a six-cysteine motif Cys-Cys-Gly…Cys-Ser-Cys…Cys…Cys, which is a characteristic motif of CD82 and CD37 vertebrate tetraspanin sequences. Since it is close to CD82s in sequence similarity, we name it as Lja-CD82-like. From the distribution profile of the conserved motifs of CD82-like, CD82, and CD37 molecules from molluscas to mammals, it seems that the CD82s and CD37s evolved from a common ancestral gene through a gene duplication event to their modern forms by a short insertion or substitution approaches. The phylogenetic analysis indicated that CD82 and CD37 molecules of jawed vertebrates originated from a common ancestral gene which is close to agnathan CD82-like and evolved into two distinct paralogous groups maybe after the divergence of jawed and jawless vertebrates. An expression vector with trigger factor (TF) was constructed to ensure that Lja-CD82-like express in prokaryotic expression host. The expressions of Lja-CD82-like messenger RNA (mRNA) and protein in immune-related tissues of lamprey were detected by real-time quantitative polymerase chain reaction and western blotting. Results showed that the mRNA and the protein levels of Lja-CD82-like were significantly upregulated in lymphocyte-like cells, gills, and supraneural myeloid bodies after stimulation with mixed antigens, respectively. Our data provided a foundation for the further study of Lja-CD82-like and its role in immune response process of jawless vertebrates.
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Affiliation(s)
- Xiaoping Zhang
- College of Life Science, Liaoning Normal University, Dalian, 116029, China.,Lamprey Research Center, Liaoning Normal University, Dalian, 116029, China
| | - Xueying Song
- College of Life Science, Liaoning Normal University, Dalian, 116029, China.,Lamprey Research Center, Liaoning Normal University, Dalian, 116029, China
| | - Peng Su
- College of Life Science, Liaoning Normal University, Dalian, 116029, China.,Lamprey Research Center, Liaoning Normal University, Dalian, 116029, China
| | - Meng Gou
- College of Life Science, Liaoning Normal University, Dalian, 116029, China.,Lamprey Research Center, Liaoning Normal University, Dalian, 116029, China
| | - Hao Wang
- College of Life Science, Liaoning Normal University, Dalian, 116029, China.,Lamprey Research Center, Liaoning Normal University, Dalian, 116029, China
| | - Xin Liu
- College of Life Science, Liaoning Normal University, Dalian, 116029, China. .,Lamprey Research Center, Liaoning Normal University, Dalian, 116029, China.
| | - Qingwei Li
- College of Life Science, Liaoning Normal University, Dalian, 116029, China. .,Lamprey Research Center, Liaoning Normal University, Dalian, 116029, China.
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45
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Analyzing Protein Clusters on the Plasma Membrane: Application of Spatial Statistical Analysis Methods on Super-Resolution Microscopy Images. FOCUS ON BIO-IMAGE INFORMATICS 2016; 219:95-122. [DOI: 10.1007/978-3-319-28549-8_4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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46
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Marjon KD, Termini CM, Karlen KL, Saito-Reis C, Soria CE, Lidke KA, Gillette JM. Tetraspanin CD82 regulates bone marrow homing of acute myeloid leukemia by modulating the molecular organization of N-cadherin. Oncogene 2015; 35:4132-40. [PMID: 26592446 PMCID: PMC4877306 DOI: 10.1038/onc.2015.449] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 09/18/2015] [Accepted: 10/22/2015] [Indexed: 11/16/2022]
Abstract
Communication between acute myeloid leukemia (AML) and the bone marrow microenvironment is known to control disease progression. Therefore, regulation of AML cell trafficking and adhesion to the bone marrow is of significant interest. In this study, we demonstrate that differential expression of the membrane scaffold CD82 modulates the bone marrow homing of AML cells. By combining mutational analysis and super-resolution imaging, we identify membrane protein clustering by CD82 as a regulator of AML cell adhesion and bone marrow homing. Cluster analysis of super-resolution data indicates that N-linked glycosylation and palmitoylation of CD82 are both critical modifications that control the microdomain organization of CD82 as well as the nanoscale clustering of associated adhesion protein, N-cadherin. We demonstrate that inhibition of CD82 glycosylation increases the molecular packing of N-cadherin and promotes the bone marrow homing of AML cells. In contrast, we find that inhibition of CD82 palmitoylation disrupts the formation and organization of N-cadherin clusters and significantly diminishes bone marrow trafficking of AML. Taken together, these data establish a mechanism where the membrane organization of CD82, through specific post-translational modifications, regulates N-cadherin clustering and membrane density, which impacts the in vivo trafficking of AML cells. As such, these observations provide an alternative model for targeting AML where modulation of protein organization within the membrane may be an effective treatment therapy to disrupt the bone marrow homing potential of AML cells.
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Affiliation(s)
- K D Marjon
- Department of Pathology, University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque, NM, USA
| | - C M Termini
- Department of Pathology, University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque, NM, USA
| | - K L Karlen
- Department of Pathology, University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque, NM, USA
| | - C Saito-Reis
- Department of Pathology, University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque, NM, USA
| | - C E Soria
- Department of Pathology, University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque, NM, USA
| | - K A Lidke
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA
| | - J M Gillette
- Department of Pathology, University of New Mexico Health Sciences Center, University of New Mexico, Albuquerque, NM, USA
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47
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Wee JL, Schulze KE, Jones EL, Yeung L, Cheng Q, Pereira CF, Costin A, Ramm G, van Spriel AB, Hickey MJ, Wright MD. Tetraspanin CD37 Regulates β2 Integrin-Mediated Adhesion and Migration in Neutrophils. THE JOURNAL OF IMMUNOLOGY 2015; 195:5770-9. [PMID: 26566675 DOI: 10.4049/jimmunol.1402414] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 10/14/2015] [Indexed: 01/13/2023]
Abstract
Deciphering the molecular basis of leukocyte recruitment is critical to the understanding of inflammation. In this study, we investigated the contribution of the tetraspanin CD37 to this key process. CD37-deficient mice showed impaired neutrophil recruitment in a peritonitis model. Intravital microscopic analysis indicated that the absence of CD37 impaired the capacity of leukocytes to follow a CXCL1 chemotactic gradient accurately in the interstitium. Moreover, analysis of CXCL1-induced leukocyte-endothelial cell interactions in postcapillary venules revealed that CXCL1-induced neutrophil adhesion and transmigration were reduced in the absence of CD37, consistent with a reduced capacity to undergo β2 integrin-dependent adhesion. This result was supported by in vitro flow chamber experiments that demonstrated an impairment in adhesion of CD37-deficient neutrophils to the β2 integrin ligand, ICAM-1, despite the normal display of high-affinity β2 integrins. Superresolution microscopic assessment of localization of CD37 and CD18 in ICAM-1-adherent neutrophils demonstrated that these molecules do not significantly cocluster in the cell membrane, arguing against the possibility that CD37 regulates β2 integrin function via a direct molecular interaction. Moreover, CD37 ablation did not affect β2 integrin clustering. In contrast, the absence of CD37 in neutrophils impaired actin polymerization, cell spreading and polarization, dysregulated Rac-1 activation, and accelerated β2 integrin internalization. Together, these data indicate that CD37 promotes neutrophil adhesion and recruitment via the promotion of cytoskeletal function downstream of integrin-mediated adhesion.
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Affiliation(s)
- Janet L Wee
- Department of Immunology, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria 3004, Australia; Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
| | - Keith E Schulze
- Monash Micro Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Eleanor L Jones
- Department of Immunology, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria 3004, Australia
| | - Louisa Yeung
- Department of Immunology, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria 3004, Australia; Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
| | - Qiang Cheng
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
| | - Candida F Pereira
- Burnet Institute, Alfred Medical Research and Education Precinct, Melbourne, Victoria 3004, Australia; and
| | - Adam Costin
- Monash Micro Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Georg Ramm
- Monash Micro Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Annemiek B van Spriel
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, 6525 GA Nijmegen, the Netherlands
| | - Michael J Hickey
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Clayton, Victoria 3168, Australia
| | - Mark D Wright
- Department of Immunology, Monash University, Alfred Medical Research and Education Precinct, Melbourne, Victoria 3004, Australia;
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48
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Uchtmann K, Park ER, Bergsma A, Segula J, Edick MJ, Miranti CK. Homozygous loss of mouse tetraspanin CD82 enhances integrin αIIbβ3 expression and clot retraction in platelets. Exp Cell Res 2015; 339:261-9. [PMID: 26562164 DOI: 10.1016/j.yexcr.2015.11.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 11/03/2015] [Accepted: 11/07/2015] [Indexed: 11/15/2022]
Abstract
Integrin αIIbβ3 is critical for platelet-mediated blood clotting. Tetraspanins are well-established regulators of integrins and genetic loss of tetraspanin CD151 or TSSC6 in mice leads to increased bleeding due to inadequate integrin αIIbβ3 outside-in signaling. Conversely, mild but enhanced integrin αIIbβ3 activation and hyperaggregation is observed in CD9 and CD63 null mice respectively. CD82 is reportedly expressed in platelets; however its function is unknown. Using genetically engineered CD82 null mice, we investigated the role of the tetraspanin CD82 in platelet activation. Loss of CD82 resulted in reduced bleed times in vivo. CD82 was present on the surface of both human and mouse platelets, and its levels did not change upon platelet activation or degranulation. No differences in platelet activation, degranulation, or aggregation in response to ADP or collagen were detected in CD82 null mice. However, the kinetics of clot retraction was enhanced, which was intrinsic to the CD82-null platelets. Integrin αIIbβ3 surface expression was elevated on the platelets from CD82 null mice and they displayed enhanced adhesion and tyrosine kinase signaling on fibrinogen. This is the first report on CD82 function in platelets; which we found intrinsically modulates clot retraction, integrin αIIbβ3 expression, cell adhesion, and tyrosine signaling.
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Affiliation(s)
- Kristen Uchtmann
- Lab of Integrin Signaling, Van Andel Research Institute, Grand Rapids, MI 49503 United States
| | - Electa R Park
- Lab of Integrin Signaling, Van Andel Research Institute, Grand Rapids, MI 49503 United States
| | - Alexis Bergsma
- Lab of Integrin Signaling, Van Andel Research Institute, Grand Rapids, MI 49503 United States
| | - Justin Segula
- Lab of Integrin Signaling, Van Andel Research Institute, Grand Rapids, MI 49503 United States
| | - Mathew J Edick
- Lab of Integrin Signaling, Van Andel Research Institute, Grand Rapids, MI 49503 United States
| | - Cindy K Miranti
- Lab of Integrin Signaling, Van Andel Research Institute, Grand Rapids, MI 49503 United States.
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Zuidscherwoude M, Göttfert F, Dunlock VME, Figdor CG, van den Bogaart G, van Spriel AB. The tetraspanin web revisited by super-resolution microscopy. Sci Rep 2015; 5:12201. [PMID: 26183063 PMCID: PMC4505338 DOI: 10.1038/srep12201] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 06/17/2015] [Indexed: 12/19/2022] Open
Abstract
The spatial organization of membrane proteins in the plasma membrane is critical for signal transduction, cell communication and membrane trafficking. Tetraspanins organize functional higher-order protein complexes called ‘tetraspanin-enriched microdomains (TEMs)’ via interactions with partner molecules and other tetraspanins. Still, the nanoscale organization of TEMs in native plasma membranes has not been resolved. Here, we elucidated the size, density and distribution of TEMs in the plasma membrane of human B cells and dendritic cells using dual color stimulated emission depletion (STED) microscopy. We demonstrate that tetraspanins form individual nanoclusters smaller than 120 nm and quantified that a single tetraspanin CD53 cluster contains less than ten CD53 molecules. CD53 and CD37 domains were adjacent to and displayed only minor overlap with clusters containing tetraspanins CD81 or CD82. Moreover, CD53 and CD81 were found in closer proximity to their partners MHC class II and CD19 than to other tetraspanins. Although these results indicate that tetraspanin domains are adjacently positioned in the plasma membrane, they challenge the current view of the tetraspanin web of multiple tetraspanin species organized into a single domain. This study increases the molecular understanding of TEMs at the nanoscale level which is essential for comprehending tetraspanin function in cell biology.
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Affiliation(s)
- Malou Zuidscherwoude
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Fabian Göttfert
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Vera Marie E Dunlock
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Carl G Figdor
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Geert van den Bogaart
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Annemiek B van Spriel
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
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Nishioka C, Ikezoe T, Yokoyama A. Blockade of CD82 by a monoclonal antibody potentiates anti-leukemia effects of AraC in vivo. Cancer Med 2015; 4:1426-31. [PMID: 26139471 PMCID: PMC4567027 DOI: 10.1002/cam4.482] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 05/06/2015] [Accepted: 05/07/2015] [Indexed: 11/23/2022] Open
Abstract
We recently found that CD82 inhibits matrix metalloproteinase 9 and augments adhesion of CD34+/CD38− acute myelogenous leukemia (AML) cells to the bone marrow (BM) microenvironment. The present study found that the use of an anti-CD82 monoclonal antibody (CD82 mAb) mobilized CD34+ leukemia cells from BM into the peripheral blood in a humanized AML murine model. The use of CD82 mAb in combination with cytarabine (AraC) significantly prolonged survival of immunodeficient mice-bearing human AML cells than did treatment with either AraC or CD82 mAb alone. Taken together, the combination of an anti-leukemic agent and the mobilizing agent CD82 mAb may be a promising treatment strategy to treat patients with AML.
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Affiliation(s)
- Chie Nishioka
- Department of Hematology and Respiratory Medicine, Kochi Medical School, Kochi University, Nankoku, Kochi, 783-8505, Japan
| | - Takayuki Ikezoe
- Department of Hematology and Respiratory Medicine, Kochi Medical School, Kochi University, Nankoku, Kochi, 783-8505, Japan
| | - Akihito Yokoyama
- Department of Hematology and Respiratory Medicine, Kochi Medical School, Kochi University, Nankoku, Kochi, 783-8505, Japan
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