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Miura A, Manabe Y, Suzuki KGN, Shomura H, Okamura S, Shirakawa A, Yano K, Miyake S, Mayusumi K, Lin CC, Morimoto K, Ishitobi J, Nakase I, Arai K, Kobayashi S, Ishikawa U, Kanoh H, Miyoshi E, Yamaji T, Kabayama K, Fukase K. De Novo Glycan Display on Cell Surfaces Using HaloTag: Visualizing the Effect of the Galectin Lattice on the Lateral Diffusion and Extracellular Vesicle Loading of Glycosylated Membrane Proteins. J Am Chem Soc 2024. [PMID: 38963258 DOI: 10.1021/jacs.4c02040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2024]
Abstract
Glycans cover the cell surface to form the glycocalyx, which governs a myriad of biological phenomena. However, understanding and regulating glycan functions is extremely challenging due to the large number of heterogeneous glycans that engage in intricate interaction networks with diverse biomolecules. Glycocalyx-editing techniques offer potent tools to probe their functions. In this study, we devised a HaloTag-based technique for glycan manipulation, which enables the introduction of chemically synthesized glycans onto a specific protein (protein of interest, POI) and concurrently incorporates fluorescent units to attach homogeneous, well-defined glycans to the fluorescence-labeled POIs. Leveraging this HaloTag-based glycan-display system, we investigated the influence of the interactions between Gal-3 and various N-glycans on protein dynamics. Our analyses revealed that glycosylation modulates the lateral diffusion of the membrane proteins in a structure-dependent manner through interaction with Gal-3, particularly in the context of the Gal-3-induced formation of the glycan network (galectin lattice). Furthermore, N-glycan attachment was also revealed to have a significant impact on the extracellular vesicle-loading of membrane proteins. Notably, our POI-specific glycan introduction does not disrupt intact glycan structures, thereby enabling a functional analysis of glycans in the presence of native glycan networks. This approach complements conventional glycan-editing methods and provides a means for uncovering the molecular underpinnings of glycan functions on the cell surface.
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Affiliation(s)
- Ayane Miura
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Yoshiyuki Manabe
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Forefront Research Center, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Kenichi G N Suzuki
- Institute for Glyco-core Research (iGCORE), Gifu University, Gifu 501-1193, Japan
- National Cancer Center Research Institute, Chuo-ku, Tokyo 104-0045, Japan
| | - Hiroki Shomura
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Soichiro Okamura
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Asuka Shirakawa
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Kumpei Yano
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Shuto Miyake
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Koki Mayusumi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Chun-Cheng Lin
- Department of Chemistry, National Tsing-Hua University, Hsinchu 30013, Taiwan
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Kenta Morimoto
- Department of Biological Chemistry, Graduate School of Science, Osaka Metropolitan University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Jojiro Ishitobi
- Department of Biological Chemistry, Graduate School of Science, Osaka Metropolitan University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Ikuhiko Nakase
- Department of Biological Chemistry, Graduate School of Science, Osaka Metropolitan University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
- Department of Biological Chemistry, School of Science, Osaka Metropolitan University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Kenta Arai
- Advanced ICT Research Institute, National Institute of Information and Communications Technology, 588-2 Iwaoka, Iwaoka-cho, Nishi-ku, Kobe, Hyogo 651-2492, Japan
| | - Shouhei Kobayashi
- Advanced ICT Research Institute, National Institute of Information and Communications Technology, 588-2 Iwaoka, Iwaoka-cho, Nishi-ku, Kobe, Hyogo 651-2492, Japan
| | - Ushio Ishikawa
- Division of Glycopathology, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, 4-4-1, Komatsushima, Aoba Ward, Sendai, Miyagi 981-8558, Japan
| | - Hirotaka Kanoh
- Division of Glycopathology, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, 4-4-1, Komatsushima, Aoba Ward, Sendai, Miyagi 981-8558, Japan
| | - Eiji Miyoshi
- Department of Molecular Biochemistry and Clinical Investigation, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Toshiyuki Yamaji
- Department of Biochemistry and Cell Biology, National Institute of Infectious Diseases, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Kazuya Kabayama
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Forefront Research Center, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Interdisciplinary Research Center for Radiation Sciences, Institute for Radiation Sciences, Osaka University, 2-4 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Koichi Fukase
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Forefront Research Center, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- Center for Advanced Modalities and DDS, Osaka University, 1-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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Querol Cano L, Dunlock VME, Schwerdtfeger F, van Spriel AB. Membrane organization by tetraspanins and galectins shapes lymphocyte function. Nat Rev Immunol 2024; 24:193-212. [PMID: 37758850 DOI: 10.1038/s41577-023-00935-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/15/2023] [Indexed: 09/29/2023]
Abstract
Immune receptors are not randomly distributed at the plasma membrane of lymphocytes but are segregated into specialized domains that function as platforms to initiate signalling, as exemplified by the B cell or T cell receptor complex and the immunological synapse. 'Membrane-organizing proteins' and, in particular, tetraspanins and galectins, are crucial for controlling the spatiotemporal organization of immune receptors and other signalling proteins. Deficiencies in specific tetraspanins and galectins result in impaired immune synapse formation, lymphocyte proliferation, antibody production and migration, which can lead to impaired immunity, tumour development and autoimmunity. In contrast to conventional ligand-receptor interactions, membrane organizers interact in cis (on the same cell) and modulate receptor clustering, receptor dynamics and intracellular signalling. New findings have uncovered their complex and dynamic nature, revealing shared binding partners and collaborative activity in determining the composition of membrane domains. Therefore, immune receptors should not be envisaged as independent entities and instead should be studied in the context of their spatial organization in the lymphocyte membrane. We advocate for a novel approach to study lymphocyte function by globally analysing the role of membrane organizers in the assembly of different membrane complexes and discuss opportunities to develop therapeutic approaches that act via the modulation of membrane organization.
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Affiliation(s)
- Laia Querol Cano
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Vera-Marie E Dunlock
- Department of Medical BioSciences, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Fabian Schwerdtfeger
- 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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Acuto O. T-cell virtuosity in ''knowing thyself". Front Immunol 2024; 15:1343575. [PMID: 38415261 PMCID: PMC10896960 DOI: 10.3389/fimmu.2024.1343575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 01/17/2024] [Indexed: 02/29/2024] Open
Abstract
Major Histocompatibility Complex (MHC) I and II and the αβ T-cell antigen receptor (TCRαβ) govern fundamental traits of adaptive immunity. They form a membrane-borne ligand-receptor system weighing host proteome integrity to detect contamination by nonself proteins. MHC-I and -II exhibit the "MHC-fold", which is able to bind a large assortment of short peptides as proxies for self and nonself proteins. The ensuing varying surfaces are mandatory ligands for Ig-like TCRαβ highly mutable binding sites. Conserved molecular signatures guide TCRαβ ligand binding sites to focus on the MHC-fold (MHC-restriction) while leaving many opportunities for its most hypervariable determinants to contact the peptide. This riveting molecular strategy affords many options for binding energy compatible with specific recognition and signalling aimed to eradicated microbial pathogens and cancer cells. While the molecular foundations of αβ T-cell adaptive immunity are largely understood, uncertainty persists on how peptide-MHC binding induces the TCRαβ signals that instruct cell-fate decisions. Solving this mystery is another milestone for understanding αβ T-cells' self/nonself discrimination. Recent developments revealing the innermost links between TCRαβ structural dynamics and signalling modality should help dissipate this long-sought-after enigma.
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Affiliation(s)
- Oreste Acuto
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
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Abdelbary M, Nolz JC. N-linked glycans: an underappreciated key determinant of T cell development, activation, and function. IMMUNOMETABOLISM (COBHAM, SURREY) 2023; 5:e00035. [PMID: 38027254 PMCID: PMC10662610 DOI: 10.1097/in9.0000000000000035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 10/31/2023] [Indexed: 12/01/2023]
Abstract
N-linked glycosylation is a post-translational modification that results in the decoration of newly synthesized proteins with diverse types of oligosaccharides that originate from the amide group of the amino acid asparagine. The sequential and collective action of multiple glycosidases and glycosyltransferases are responsible for determining the overall size, composition, and location of N-linked glycans that become covalently linked to an asparagine during and after protein translation. A growing body of evidence supports the critical role of N-linked glycan synthesis in regulating many features of T cell biology, including thymocyte development and tolerance, as well as T cell activation and differentiation. Here, we provide an overview of how specific glycosidases and glycosyltransferases contribute to the generation of different types of N-linked glycans and how these post-translational modifications ultimately regulate multiple facets of T cell biology.
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Affiliation(s)
- Mahmoud Abdelbary
- Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Portland, OR, USA
| | - Jeffrey C. Nolz
- Department of Molecular Microbiology and Immunology, Oregon Health & Science University, Portland, OR, USA
- Department of Cell, Developmental and Cancer Biology, Oregon Health & Science University, Portland, OR, USA
- Department of Dermatology, Oregon Health & Science University, Portland, OR, USA
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5
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Sy M, Newton BL, Pawling J, Hayama KL, Cordon A, Yu Z, Kuhle J, Dennis JW, Brandt AU, Demetriou M. N-acetylglucosamine inhibits inflammation and neurodegeneration markers in multiple sclerosis: a mechanistic trial. J Neuroinflammation 2023; 20:209. [PMID: 37705084 PMCID: PMC10498575 DOI: 10.1186/s12974-023-02893-9] [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: 08/01/2023] [Accepted: 09/07/2023] [Indexed: 09/15/2023] Open
Abstract
BACKGROUND In the demyelinating disease multiple sclerosis (MS), chronic-active brain inflammation, remyelination failure and neurodegeneration remain major issues despite immunotherapy. While B cell depletion and blockade/sequestration of T and B cells potently reduces episodic relapses, they act peripherally to allow persistence of chronic-active brain inflammation and progressive neurological dysfunction. N-acetyglucosamine (GlcNAc) is a triple modulator of inflammation, myelination and neurodegeneration. GlcNAc promotes biosynthesis of Asn (N)-linked-glycans, which interact with galectins to co-regulate the clustering/signaling/endocytosis of multiple glycoproteins simultaneously. In mice, GlcNAc crosses the blood brain barrier to raise N-glycan branching, suppress inflammatory demyelination by T and B cells and trigger stem/progenitor cell mediated myelin repair. MS clinical severity, demyelination lesion size and neurodegeneration inversely associate with a marker of endogenous GlcNAc, while in healthy humans, age-associated increases in endogenous GlcNAc promote T cell senescence. OBJECTIVES AND METHODS An open label dose-escalation mechanistic trial of oral GlcNAc at 6 g (n = 18) and 12 g (n = 16) for 4 weeks was performed in MS patients on glatiramer acetate and not in relapse from March 2016 to December 2019 to assess changes in serum GlcNAc, lymphocyte N-glycosylation and inflammatory markers. Post-hoc analysis examined changes in serum neurofilament light chain (sNfL) as well as neurological disability via the Expanded Disability Status Scale (EDSS). RESULTS Prior to GlcNAc therapy, high serum levels of the inflammatory cytokines IFNγ, IL-17 and IL-6 associated with reduced baseline levels of a marker of endogenous serum GlcNAc. Oral GlcNAc therapy was safe, raised serum levels and modulated N-glycan branching in lymphocytes. Glatiramer acetate reduces TH1, TH17 and B cell activity as well as sNfL, yet the addition of oral GlcNAc dose-dependently lowered serum IFNγ, IL-17, IL-6 and NfL. Oral GlcANc also dose-dependently reduced serum levels of the anti-inflammatory cytokine IL-10, which is increased in the brain of MS patients. 30% of treated patients displayed confirmed improvement in neurological disability, with an average EDSS score decrease of 0.52 points. CONCLUSIONS Oral GlcNAc inhibits inflammation and neurodegeneration markers in MS patients despite concurrent immunomodulation by glatiramer acetate. Blinded studies are required to investigate GlcNAc's potential to control residual brain inflammation, myelin repair and neurodegeneration in MS.
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Affiliation(s)
- Michael Sy
- Department of Neurology, University of California Irvine, 208 Sprague Hall, Mail Code 4032, Irvine, CA, 92697, USA
| | - Barbara L Newton
- Department of Neurology, University of California Irvine, 208 Sprague Hall, Mail Code 4032, Irvine, CA, 92697, USA
| | - Judy Pawling
- Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Ave, Toronto, ON, M5G 1X5, Canada
| | - Ken L Hayama
- Department of Neurology, University of California Irvine, 208 Sprague Hall, Mail Code 4032, Irvine, CA, 92697, USA
| | - Andres Cordon
- Department of Neurology, University of California Irvine, 208 Sprague Hall, Mail Code 4032, Irvine, CA, 92697, USA
| | - Zhaoxia Yu
- Department of Statistics, Donald Bren School of Information and Computer Sciences, University of California Irvine, Bren Hall 2019, Irvine, CA, 92697, USA
| | - Jens Kuhle
- Department of Neurology, University Hospital Basel, Mittlere Strasse 83, 4056, Basel, Switzerland
- Multiple Sclerosis Centre and Research Center for Clinical Neuroimmunology and Neuroscience (RC2NB), Departments of Biomedicine and Clinical Research, University Hospital and University of Basel, Basel, Switzerland
| | - James W Dennis
- Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Ave, Toronto, ON, M5G 1X5, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A8, Canada
| | - Alexander U Brandt
- Department of Neurology, University of California Irvine, 208 Sprague Hall, Mail Code 4032, Irvine, CA, 92697, USA
| | - Michael Demetriou
- Department of Neurology, University of California Irvine, 208 Sprague Hall, Mail Code 4032, Irvine, CA, 92697, USA.
- Department of Microbiology and Molecular Genetics, University of California Irvine, Irvine, USA.
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Tetraspanin CD53 controls T cell immunity through regulation of CD45RO stability, mobility, and function. Cell Rep 2022; 39:111006. [PMID: 35767951 DOI: 10.1016/j.celrep.2022.111006] [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: 07/01/2021] [Revised: 05/02/2022] [Accepted: 06/03/2022] [Indexed: 11/22/2022] Open
Abstract
T cells depend on the phosphatase CD45 to initiate T cell receptor signaling. Although the critical role of CD45 in T cells is established, the mechanisms controlling function and localization in the membrane are not well understood. Moreover, the regulation of specific CD45 isoforms in T cell signaling remains unresolved. By using unbiased mass spectrometry, we identify the tetraspanin CD53 as a partner of CD45 and show that CD53 controls CD45 function and T cell activation. CD53-negative T cells (Cd53-/-) exhibit substantial proliferation defects, and Cd53-/- mice show impaired tumor rejection and reduced IFNγ-producing T cells compared with wild-type mice. Investigation into the mechanism reveals that CD53 is required for CD45RO expression and mobility. In addition, CD53 is shown to stabilize CD45 on the membrane and is required for optimal phosphatase activity and subsequent Lck activation. Together, our findings reveal CD53 as a regulator of CD45 activity required for T cell immunity.
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Liu Z, Gao Z, Li B, Li J, Ou Y, Yu X, Zhang Z, Liu S, Fu X, Jin H, Wu J, Sun S, Sun S, Wu Q. Lipid-associated macrophages in the tumor-adipose microenvironment facilitate breast cancer progression. Oncoimmunology 2022; 11:2085432. [PMID: 35712121 PMCID: PMC9196645 DOI: 10.1080/2162402x.2022.2085432] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The tumor-adipose microenvironment (TAME) is a universal microecosystem, that is characterized by the dysfunction of lipid metabolism, such as excessive free fatty acids (FFAs). Macrophages are the most abundant immune cell type within TAME, although their diversity in the TAME is not clear. We first reveal that infiltration of M2-like macrophages in the TAME is associated with poor survival in breast cancer. To explore lipid-associated alterations in the TAME, we also detected the levels of FFAs transporters including fatty acid binding proteins (FABPs) and fatty acid transport protein 1 (FATP1). The results indicated that expression of fatty acid transporters in the TAME is tightly linked to the function of macrophages and predicts survival in breast cancer. To explore the impact of FFAs transporters on the function of macrophages, we performed single-cell RNA sequencing (scRNA-seq) and spatial transcriptomics. Consequently, we identified a special subpopulation of macrophages defined as lipid-associated macrophages (LAMs), highly expressed macrophage markers (CD163, SPP1 and C1QC), genes involved in lipid metabolism (FABP3, FABP4, FABP5, LPL and LIPA) and some lipid receptors (LGALS3 and TREM2). Functionally, LAMs were characterized by a canonical functional signature of M2-like macrophages, lipid accumulation and enhancing phagocytosis, and they were mostly distributed in tumor-adipose junctional regions. Finally, the allograft cancer mouse models confirmed that LAMs depletion in the TAME synergizes the antitumorigenic effects of anti-PD1 therapy. In summary, we defined a novel subtype of macrophages in the TAME, that has unique features and clinical outcomes.
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Affiliation(s)
- Zhou Liu
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Zhijie Gao
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Bei Li
- Department of Pathology, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Juanjuan Li
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Yangyang Ou
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Xin Yu
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Zun Zhang
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Siqin Liu
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Xiaoyu Fu
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Hongzhong Jin
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Juan Wu
- Department of Pathology, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Si Sun
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Shengrong Sun
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, P. R. China
| | - Qi Wu
- Tongji University Cancer Center, Shanghai Tenth People's Hospital of Tongji University, School of Medicine, Tongji University, Shanghai, P. R. China
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Mkhikian H, Hayama KL, Khachikyan K, Li C, Zhou RW, Pawling J, Klaus S, Tran PQN, Ly KM, Gong AD, Saryan H, Hai JL, Grigoryan D, Lee PL, Newton BL, Raffatellu M, Dennis JW, Demetriou M. Age-associated impairment of T cell immunity is linked to sex-dimorphic elevation of N-glycan branching. NATURE AGING 2022; 2:231-242. [PMID: 35528547 PMCID: PMC9075523 DOI: 10.1038/s43587-022-00187-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 02/02/2022] [Indexed: 11/08/2022]
Abstract
Impaired T cell immunity with aging increases mortality from infectious disease. The branching of Asparagine-linked glycans is a critical negative regulator of T cell immunity. Here we show that branching increases with age in females more than males, in naïve more than memory T cells, and in CD4+ more than CD8+ T cells. Female sex hormones and thymic output of naïve T cells (TN) decrease with age, however neither thymectomy nor ovariectomy altered branching. Interleukin-7 (IL-7) signaling was increased in old female more than male mouse TN cells, and triggered increased branching. N-acetylglucosamine, a rate-limiting metabolite for branching, increased with age in humans and synergized with IL-7 to raise branching. Reversing elevated branching rejuvenated T cell function and reduced severity of Salmonella infection in old female mice. These data suggest sex-dimorphic antagonistic pleiotropy, where IL-7 initially benefits immunity through TN maintenance but inhibits TN function by raising branching synergistically with age-dependent increases in N-acetylglucosamine.
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Affiliation(s)
- Haik Mkhikian
- Department of Pathology and Laboratory Medicine, University of California, Irvine, Irvine, CA, USA
| | - Ken L Hayama
- Department of Microbiology and Molecular Genetics, University of California, Irvine, Irvine, CA, USA
| | - Khachik Khachikyan
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - Carey Li
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - Raymond W Zhou
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - Judy Pawling
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Suzi Klaus
- Department of Microbiology and Molecular Genetics, University of California, Irvine, Irvine, CA, USA
| | - Phuong Q N Tran
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - Kim M Ly
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - Andrew D Gong
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - Hayk Saryan
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - Jasper L Hai
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - David Grigoryan
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - Philip L Lee
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - Barbara L Newton
- Department of Neurology, University of California, Irvine, Irvine, CA, USA
| | - Manuela Raffatellu
- Department of Microbiology and Molecular Genetics, University of California, Irvine, Irvine, CA, USA
- Division of Host-Microbe Systems and Therapeutics, Department of Pediatrics, University of California, San Diego, La Jolla, CA, USA
- Center for Mucosal Immunology, Allergy, and Vaccines, Chiba University-UC San Diego, La Jolla, CA, USA
| | - James W Dennis
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Michael Demetriou
- Department of Microbiology and Molecular Genetics, University of California, Irvine, Irvine, CA, USA.
- Department of Neurology, University of California, Irvine, Irvine, CA, USA.
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9
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Alsulaimany FA, Zabermawi NMO, Almukadi H, Parambath SV, Shetty PJ, Vaidyanathan V, Elango R, Babanaganapalli B, Shaik NA. Transcriptome-Based Molecular Networks Uncovered Interplay Between Druggable Genes of CD8 + T Cells and Changes in Immune Cell Landscape in Patients With Pulmonary Tuberculosis. Front Med (Lausanne) 2022; 8:812857. [PMID: 35198572 PMCID: PMC8859411 DOI: 10.3389/fmed.2021.812857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 12/20/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Tuberculosis (TB) is a major infectious disease, where incomplete information about host genetics and immune responses is hindering the development of transformative therapies. This study characterized the immune cell landscape and blood transcriptomic profile of patients with pulmonary TB (PTB) to identify the potential therapeutic biomarkers. METHODS The blood transcriptome profile of patients with PTB and controls were used for fractionating immune cell populations with the CIBERSORT algorithm and then to identify differentially expressed genes (DEGs) with R/Bioconductor packages. Later, systems biology investigations (such as semantic similarity, gene correlation, and graph theory parameters) were implemented to prioritize druggable genes contributing to the immune cell alterations in patients with TB. Finally, real time-PCR (RT-PCR) was used to confirm gene expression levels. RESULTS Patients with PTB had higher levels of four immune subpopulations like CD8+ T cells (P = 1.9 × 10-8), natural killer (NK) cells resting (P = 6.3 × 10-5), monocytes (P = 6.4 × 10-6), and neutrophils (P = 1.6 × 10-7). The functional enrichment of 624 DEGs identified in the blood transcriptome of patients with PTB revealed major dysregulation of T cell-related ontologies and pathways (q ≤ 0.05). Of the 96 DEGs shared between transcriptome and immune cell types, 39 overlapped with TB meta-profiling genetic signatures, and their semantic similarity analysis with the remaining 57 genes, yielded 45 new candidate TB markers. This study identified 9 CD8+ T cell-associated genes (ITK, CD2, CD6, CD247, ZAP70, CD3D, SH2D1A, CD3E, and IL7R) as potential therapeutic targets of PTB by combining computational druggability and co-expression (r2 ≥ |0.7|) approaches. CONCLUSION The changes in immune cell proportion and the downregulation of T cell-related genes may provide new insights in developing therapeutic compounds against chronic TB.
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Affiliation(s)
| | - Nidal M Omer Zabermawi
- Department of Biology, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Haifa Almukadi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Snijesh V Parambath
- Division of Molecular Medicine, St. John's Research Institute, Bangalore, India
| | - Preetha Jayasheela Shetty
- Department of Biomedical Sciences, College of Medicine, Gulf Medical University, Ajman, United Arab Emirates
| | - Venkatesh Vaidyanathan
- Auckland Cancer Society Research Centre (ACSRC), Faculty of Medical and Health Sciences (FM&HS), The University of Auckland, Auckland, New Zealand
| | - Ramu Elango
- Princess Al-Jawhara Al-Brahim Center of Excellence in Research of Hereditary Disorders, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Genetic Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Babajan Babanaganapalli
- Princess Al-Jawhara Al-Brahim Center of Excellence in Research of Hereditary Disorders, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Genetic Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Noor Ahmad Shaik
- Princess Al-Jawhara Al-Brahim Center of Excellence in Research of Hereditary Disorders, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Genetic Medicine, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
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Unraveling How Tumor-Derived Galectins Contribute to Anti-Cancer Immunity Failure. Cancers (Basel) 2021; 13:cancers13184529. [PMID: 34572756 PMCID: PMC8469970 DOI: 10.3390/cancers13184529] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/16/2021] [Accepted: 08/24/2021] [Indexed: 12/15/2022] Open
Abstract
Simple Summary This review compiles our current knowledge of one of the main pathways activated by tumors to escape immune attack. Indeed, it integrates the current understanding of how tumor-derived circulating galectins affect the elicitation of effective anti-tumor immunity. It focuses on several relevant topics: which are the main galectins produced by tumors, how soluble galectins circulate throughout biological liquids (taking a body-settled gradient concentration into account), the conditions required for the galectins’ functions to be accomplished at the tumor and tumor-distant sites, and how the physicochemical properties of the microenvironment in each tissue determine their functions. These are no mere semantic definitions as they define which functions can be performed in said tissues instead. Finally, we discuss the promising future of galectins as targets in cancer immunotherapy and some outstanding questions in the field. Abstract Current data indicates that anti-tumor T cell-mediated immunity correlates with a better prognosis in cancer patients. However, it has widely been demonstrated that tumor cells negatively manage immune attack by activating several immune-suppressive mechanisms. It is, therefore, essential to fully understand how lymphocytes are activated in a tumor microenvironment and, above all, how to prevent these cells from becoming dysfunctional. Tumors produce galectins-1, -3, -7, -8, and -9 as one of the major molecular mechanisms to evade immune control of tumor development. These galectins impact different steps in the establishment of the anti-tumor immune responses. Here, we carry out a critical dissection on the mechanisms through which tumor-derived galectins can influence the production and the functionality of anti-tumor T lymphocytes. This knowledge may help us design more effective immunotherapies to treat human cancers.
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Brandt AU, Sy M, Bellmann-Strobl J, Newton BL, Pawling J, Zimmermann HG, Yu Z, Chien C, Dörr J, Wuerfel JT, Dennis JW, Paul F, Demetriou M. Association of a Marker of N-Acetylglucosamine With Progressive Multiple Sclerosis and Neurodegeneration. JAMA Neurol 2021; 78:842-852. [PMID: 33970182 PMCID: PMC8111565 DOI: 10.1001/jamaneurol.2021.1116] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Question Is the serum concentration of N-acetylglucosamine (GlcNAc) altered in patients with multiple sclerosis? Findings This cross-sectional study found that patients with a progressive multiple sclerosis subtype and more severe disease have reduced serum levels of a marker of GlcNAc. In addition, GlcNAc is a rate-limiting substrate for N-glycan branching, which has been shown to regulate immunoactivity and myelination. Meaning This study suggests that GlcNAc and N-glycan branching are associated with multiple sclerosis in general and progressive multiple sclerosis in particular. Importance N-glycan branching modulates cell surface receptor availability, and its deficiency in mice promotes inflammatory demyelination, reduced myelination, and neurodegeneration. N-acetylglucosamine (GlcNAc) is a rate-limiting substrate for N-glycan branching, but, to our knowledge, endogenous serum levels in patients with multiple sclerosis (MS) are unknown. Objective To investigate a marker of endogenous serum GlcNAc levels in patients with MS. Design, Setting, and Participants A cross-sectional discovery study and cross-sectional confirmatory study were conducted at 2 academic MS centers in the US and Germany. The discovery study recruited 54 patients with MS from an outpatient clinic as well as 66 healthy controls between April 20, 2010, and June 21, 2013. The confirmatory study recruited 180 patients with MS from screening visits at an academic MS study center between April 9, 2007, and February 29, 2016. Serum samples were analyzed from December 2, 2013, to March 2, 2015. Statistical analysis was performed from February 23, 2020, to March 18, 2021. Main Outcomes and Measures Serum levels of GlcNAc plus its stereoisomers, termed N-acetylhexosamine (HexNAc), were assessed using targeted tandem mass spectroscopy. Secondary outcomes (confirmatory study) comprised imaging and clinical disease markers. Results The discovery cohort included 66 healthy controls (38 women; mean [SD] age, 42 [20] years), 33 patients with relapsing-remitting MS (RRMS; 25 women; mean [SD] age, 50 [11] years), and 21 patients with progressive MS (PMS; 14 women; mean [SD] age, 55 [7] years). The confirmatory cohort included 125 patients with RRMS (83 women; mean [SD] age, 40 [9] years) and 55 patients with PMS (22 women; mean [SD] age, 49 [80] years). In the discovery cohort, the mean (SD) serum level of GlcNAc plus its stereoisomers (HexNAc) was 710 (174) nM in healthy controls and marginally reduced in patients with RRMS (mean [SD] level, 682 [173] nM; P = .04), whereas patients with PMS displayed markedly reduced levels compared with healthy controls (mean [SD] level, 548 [101] nM; P = 9.55 × 10−9) and patients with RRMS (P = 1.83 × 10−4). The difference between patients with RRMS (mean [SD] level, 709 [193] nM) and those with PMS (mean [SD] level, 405 [161] nM; P = 7.6 × 10−18) was confirmed in the independent confirmatory cohort. Lower HexNAc serum levels correlated with worse expanded disability status scale scores (ρ = –0.485; P = 4.73 × 10−12), lower thalamic volume (t = 1.7; P = .04), and thinner retinal nerve fiber layer (B = 0.012 [SE = 7.5 × 10−11]; P = .008). Low baseline serum HexNAc levels correlated with a greater percentage of brain volume loss at 18 months (t = 1.8; P = .04). Conclusions and Relevance This study suggests that deficiency of GlcNAc plus its stereoisomers (HexNAc) may be a biomarker for PMS. Previous preclinical, human genetic, and ex vivo human mechanistic studies revealed that N-glycan branching and/or GlcNAc may reduce proinflammatory responses, promote myelin repair, and decrease neurodegeneration. Combined, the data suggest that GlcNAc deficiency may be associated with progressive disease and neurodegeneration in patients with MS.
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Affiliation(s)
- Alexander U Brandt
- Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Max Delbrück Center for Molecular Medicine, Berlin, Germany.,Department of Neurology, University of California, Irvine, Irvine.,NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Michael Sy
- Department of Neurology, University of California, Irvine, Irvine
| | - Judith Bellmann-Strobl
- Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Max Delbrück Center for Molecular Medicine, Berlin, Germany.,NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Barbara L Newton
- Department of Neurology, University of California, Irvine, Irvine
| | - Judy Pawling
- Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Toronto, Ontario, Canada
| | - Hanna G Zimmermann
- Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Max Delbrück Center for Molecular Medicine, Berlin, Germany.,NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Zhaoxia Yu
- Department of Statistics, University of California, Irvine, Irvine
| | - Claudia Chien
- Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Max Delbrück Center for Molecular Medicine, Berlin, Germany.,NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Jan Dörr
- Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Max Delbrück Center for Molecular Medicine, Berlin, Germany.,NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Jens Th Wuerfel
- Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Max Delbrück Center for Molecular Medicine, Berlin, Germany.,Medical Image Analysis Center, Department of Biomedical Engineering, University Basel, Basel, Switzerland
| | - James W Dennis
- Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Friedemann Paul
- Experimental and Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, and Max Delbrück Center for Molecular Medicine, Berlin, Germany.,NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Michael Demetriou
- Department of Neurology, University of California, Irvine, Irvine.,Department of Microbiology and Molecular Genetics, University of California, Irvine, Irvine
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12
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Sy M, Brandt AU, Lee SU, Newton BL, Pawling J, Golzar A, Rahman AMA, Yu Z, Cooper G, Scheel M, Paul F, Dennis JW, Demetriou M. N-acetylglucosamine drives myelination by triggering oligodendrocyte precursor cell differentiation. J Biol Chem 2021; 295:17413-17424. [PMID: 33453988 PMCID: PMC7762951 DOI: 10.1074/jbc.ra120.015595] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/17/2020] [Indexed: 01/11/2023] Open
Abstract
Myelination plays an important role in cognitive development and in demyelinating diseases like multiple sclerosis (MS), where failure of remyelination promotes permanent neuro-axonal damage. Modification of cell surface receptors with branched N-glycans coordinates cell growth and differentiation by controlling glycoprotein clustering, signaling, and endocytosis. GlcNAc is a rate-limiting metabolite for N-glycan branching. Here we report that GlcNAc and N-glycan branching trigger oligodendrogenesis from precursor cells by inhibiting platelet-derived growth factor receptor-α cell endocytosis. Supplying oral GlcNAc to lactating mice drives primary myelination in newborn pups via secretion in breast milk, whereas genetically blocking N-glycan branching markedly inhibits primary myelination. In adult mice with toxin (cuprizone)-induced demyelination, oral GlcNAc prevents neuro-axonal damage by driving myelin repair. In MS patients, endogenous serum GlcNAc levels inversely correlated with imaging measures of demyelination and microstructural damage. Our data identify N-glycan branching and GlcNAc as critical regulators of primary myelination and myelin repair and suggest that oral GlcNAc may be neuroprotective in demyelinating diseases like MS.
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Affiliation(s)
- Michael Sy
- Department of Neurology, University of California Irvine, Irvine, California, USA
| | - Alexander U Brandt
- Department of Neurology, University of California Irvine, Irvine, California, USA; Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany; NeuroCure Clinical Research Center, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Sung-Uk Lee
- Department of Neurology, University of California Irvine, Irvine, California, USA
| | - Barbara L Newton
- Department of Neurology, University of California Irvine, Irvine, California, USA
| | - Judy Pawling
- Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Canada
| | - Autreen Golzar
- Department of Neurology, University of California Irvine, Irvine, California, USA
| | - Anas M A Rahman
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Zhaoxia Yu
- Department of Statistics, Donald Bren School of Information and Computer Sciences, University of California Irvine, Irvine, California, USA
| | - Graham Cooper
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany; NeuroCure Clinical Research Center, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany; Einstein Center for Neurosciences, Berlin, Germany; Department of Experimental Neurology and Center for Stroke Research, Berlin, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Michael Scheel
- NeuroCure Clinical Research Center, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Friedemann Paul
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany; NeuroCure Clinical Research Center, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany; Department of Experimental Neurology and Center for Stroke Research, Berlin, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - James W Dennis
- Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Canada; Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Michael Demetriou
- Department of Neurology, University of California Irvine, Irvine, California, USA; Department of Microbiology and Molecular Genetics, University of California Irvine, Irvine, California, USA.
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13
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Horna P, Shi M, Olteanu H, Johansson U. Emerging Role of T-cell Receptor Constant β Chain-1 (TRBC1) Expression in the Flow Cytometric Diagnosis of T-cell Malignancies. Int J Mol Sci 2021; 22:ijms22041817. [PMID: 33673033 PMCID: PMC7918842 DOI: 10.3390/ijms22041817] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/09/2021] [Accepted: 02/09/2021] [Indexed: 02/07/2023] Open
Abstract
T-cell clonality testing is integral to the diagnostic work-up of T-cell malignancies; however, current methods lack specificity and sensitivity, which can make the diagnostic process difficult. The recent discovery of a monoclonal antibody (mAb) specific for human TRBC1 will greatly improve the outlook for T-cell malignancy diagnostics. The anti-TRBC1 mAb can be used in flow cytometry immunophenotyping assays to provide a low-cost, robust, and highly specific test that detects clonality of immunophenotypically distinct T-cell populations. Recent studies demonstrate the clinical utility of this approach in several contexts; use of this antibody in appropriately designed flow cytometry panels improves detection of circulating disease in patients with cutaneous T-cell lymphoma, eliminates the need for molecular clonality testing in the context of large granular lymphocyte leukemia, and provides more conclusive results in the context of many other T-cell disorders. It is worth noting that the increased ability to detect discrete clonal T-cell populations means that identification of T-cell clones of uncertain clinical significance (T-CUS) will become more common. This review discusses this new antibody and describes how it defines clonal T-cells. We present and discuss assay design and summarize findings to date about the use of flow cytometry TRBC1 analysis in the field of diagnostics, including lymph node and fluid sample investigations. We also make suggestions about how to apply the assay results in clinical work-ups, including how to interpret and report findings of T-CUS. Finally, we highlight areas that we think will benefit from further research.
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Affiliation(s)
- Pedro Horna
- Division of Hematopathology, Mayo Clinic, Rochester, MN 55905, USA; (P.H.); (M.S.); (H.O.)
| | - Min Shi
- Division of Hematopathology, Mayo Clinic, Rochester, MN 55905, USA; (P.H.); (M.S.); (H.O.)
| | - Horatiu Olteanu
- Division of Hematopathology, Mayo Clinic, Rochester, MN 55905, USA; (P.H.); (M.S.); (H.O.)
| | - Ulrika Johansson
- SI-HMDS, University Hospitals Bristol and Weston NHS Foundation Trust, Bristol BS1 3NU, UK
- Correspondence:
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14
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Maeda K, Tasaki M, Ando Y, Ohtsubo K. Galectin-lattice sustains function of cationic amino acid transporter and insulin secretion of pancreatic β cells. J Biochem 2021; 167:587-596. [PMID: 31960919 DOI: 10.1093/jb/mvaa007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 01/09/2020] [Indexed: 01/01/2023] Open
Abstract
Maintenance of cell surface residency and function of glycoproteins by lectins are essential for regulating cellular functions. Galectins are β-galactoside-binding lectins and form a galectin-lattice, which regulates stability, clustering, membrane sub-domain localization and endocytosis of plasmalemmal glycoproteins. We have previously reported that galectin-2 (Gal-2) forms a complex with cationic amino acid transporter 3 (CAT3) in pancreatic β cells, although the biological significance of the molecular interaction between Gal-2 and CAT3 has not been elucidated. In this study, we demonstrated that the structure of N-glycan of CAT3 was either tetra- or tri-antennary branch structure carrying β-galactosides, which works as galectin-ligands. Indeed, CAT3 bound to Gal-2 using β-galactoside epitope. Moreover, the disruption of the glycan-mediated bindings between galectins and CAT3 significantly reduced cell surface expression levels of CAT3. The reduced cell surface residency of CAT3 attenuated the cellular arginine uptake activities and subsequently reduced nitric oxide production, and thus impaired the arginine-stimulated insulin secretion of pancreatic β cells. These results indicate that galectin-lattice stabilizes CAT3 by preventing endocytosis to sustain the arginine-stimulated insulin secretion of pancreatic β cells. This provides a novel cell biological insight into the endocrinological mechanism of nutrition metabolism and homeostasis.
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Affiliation(s)
- Kento Maeda
- Department of Analytical Biochemistry;, Graduate School of Health Sciences, Kumamoto University, 4-24-1 Kuhonji, Chuo-Ku, Kumamoto 862-0976, Japan
| | - Masayoshi Tasaki
- Department of Morphological and Physiological Sciences, Graduate School of Health Sciences, Kumamoto University, 4-24-1 Kuhonji, Chuo-Ku, Kumamoto 862-0976, Japan.,Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
| | - Yukio Ando
- Depatment of Amyloidosis Research, Nagasaki International University, Nagasaki 859-3243, Japan
| | - Kazuaki Ohtsubo
- Department of Analytical Biochemistry;, Graduate School of Health Sciences, Kumamoto University, 4-24-1 Kuhonji, Chuo-Ku, Kumamoto 862-0976, Japan.,Department of Analytical Biochemistry, Faculty of Life Sciences, Kumamoto University, 4-24-1 Kuhonji, Chuo-Ku, Kumamoto 862-0976, Japan
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15
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Mortales CL, Lee SU, Manousadjian A, Hayama KL, Demetriou M. N-Glycan Branching Decouples B Cell Innate and Adaptive Immunity to Control Inflammatory Demyelination. iScience 2020; 23:101380. [PMID: 32745987 PMCID: PMC7398982 DOI: 10.1016/j.isci.2020.101380] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/10/2020] [Accepted: 07/14/2020] [Indexed: 11/21/2022] Open
Abstract
B cell depletion potently reduces episodes of inflammatory demyelination in multiple sclerosis (MS), predominantly through loss of innate rather than adaptive immunity. However, molecular mechanisms controlling innate versus adaptive B cell function are poorly understood. N-glycan branching, via interactions with galectins, controls endocytosis and signaling of cell surface receptors to control cell function. Here we report that N-glycan branching in B cells dose dependently reduces pro-inflammatory innate responses by titrating decreases in Toll-like receptor-4 (TLR4) and TLR2 surface expression via endocytosis. In contrast, a minimal level of N-glycan branching maximizes surface retention of the B cell receptor (BCR) and the CD19 co-receptor to promote adaptive immunity. Branched N-glycans inhibit antigen presentation by B cells to reduce T helper cell-17 (TH17)/TH1 differentiation and inflammatory demyelination in mice. Thus, N-glycan branching negatively regulates B cell innate function while promoting/maintaining adaptive immunity via BCR, providing an attractive therapeutic target for MS.
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Affiliation(s)
- Christie-Lynn Mortales
- Department of Microbiology & Molecular Genetics, University of California, Irvine, CA 92617, USA
| | - Sung-Uk Lee
- Department of Neurology, University of California, Irvine, CA 92617, USA
| | - Armen Manousadjian
- Department of Neurology, University of California, Irvine, CA 92617, USA
| | - Ken L Hayama
- Department of Microbiology & Molecular Genetics, University of California, Irvine, CA 92617, USA
| | - Michael Demetriou
- Department of Neurology, University of California, Irvine, CA 92617, USA; Department of Microbiology & Molecular Genetics, University of California, Irvine, CA 92617, USA.
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16
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Abstract
The maintenance of organismal homeostasis requires partitioning and transport of biochemical molecules between organ systems, their composite cells, and subcellular organelles. Although transcriptional programming undeniably defines the functional state of cells and tissues, underlying biochemical networks are intricately intertwined with transcriptional, translational, and post-translational regulation. Studies of the metabolic regulation of immunity have elegantly illustrated this phenomenon. The cells of the immune system interface with a diverse set of environmental conditions. Circulating immune cells perfuse peripheral organs in the blood and lymph, patrolling for pathogen invasion. Resident immune cells remain in tissues and play more newly appreciated roles in tissue homeostasis and immunity. Each of these cell populations interacts with unique and dynamic tissue environments, which vary greatly in biochemical composition. Furthermore, the effector response of immune cells to a diverse set of activating cues requires unique cellular adaptations to supply the requisite biochemical landscape. In this review, we examine the role of spatial partitioning of metabolic processes in immune function. We focus on studies of lymphocyte metabolism, with reference to the greater immunometabolism literature when appropriate to illustrate this concept.
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Affiliation(s)
- Justin A Shyer
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Richard A Flavell
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA.
- Howard Hughes Medical Institute, Chevy Chase, MD, USA.
| | - Will Bailis
- Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, PA, USA.
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17
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Navarro P, Martínez-Bosch N, Blidner AG, Rabinovich GA. Impact of Galectins in Resistance to Anticancer Therapies. Clin Cancer Res 2020; 26:6086-6101. [DOI: 10.1158/1078-0432.ccr-18-3870] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 06/27/2020] [Accepted: 07/22/2020] [Indexed: 11/16/2022]
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18
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Mortales CL, Lee SU, Demetriou M. N-Glycan Branching Is Required for Development of Mature B Cells. THE JOURNAL OF IMMUNOLOGY 2020; 205:630-636. [PMID: 32591389 DOI: 10.4049/jimmunol.2000101] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 05/29/2020] [Indexed: 12/14/2022]
Abstract
Galectins have been implicated in inhibiting BCR signaling in mature B cells but promoting pre-BCR signaling during early development. Galectins bind to branched N-glycans attached to cell surface glycoproteins to control the distribution, clustering, endocytosis, and signaling of surface glycoproteins. During T cell development, N-glycan branching is required for positive selection of thymocytes, inhibiting both death by neglect and negative selection via enhanced surface retention of the CD4/CD8 coreceptors and limiting TCR clustering/signaling, respectively. The role of N-glycan branching in B cell development is unknown. In this study, we report that N-glycan branching is absolutely required for development of mature B cells in mice. Elimination of branched N-glycans in developing B cells via targeted deletion of N-acetylglucosaminyl transferase I (Mgat1) markedly reduced cellularity in the bone marrow and/or spleen and inhibited maturation of pre-, immature, and transitional stage 2 B cells. Branching deficiency markedly reduced surface expression of the pre-BCR/BCR coreceptor CD19 and promoted spontaneous death of pre-B cells and immature B cells in vitro. Death was rescued by low-dose pre-BCR/BCR stimulation but exacerbated by high-dose pre-BCR/BCR stimulation as well as antiapoptotic BclxL overexpression in pre-B cells. Branching deficiency also enhanced Nur77 induction, a marker of negative selection. Together, these data suggest that, as in T cells, N-glycan branching promotes positive selection of B cells by augmenting pre-BCR/BCR signaling via CD19 surface retention, whereas limiting negative selection from excessive BCR engagement.
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Affiliation(s)
- Christie-Lynn Mortales
- Department of Microbiology and Molecular Genetics, University of California, Irvine, Irvine, CA 92697; and
| | - Sung-Uk Lee
- Department of Neurology, University of California, Irvine, Irvine, CA 92697
| | - Michael Demetriou
- Department of Microbiology and Molecular Genetics, University of California, Irvine, Irvine, CA 92697; and .,Department of Neurology, University of California, Irvine, Irvine, CA 92697
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19
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de Haas P, Hendriks WJAJ, Lefeber DJ, Cambi A. Biological and Technical Challenges in Unraveling the Role of N-Glycans in Immune Receptor Regulation. Front Chem 2020; 8:55. [PMID: 32117881 PMCID: PMC7013033 DOI: 10.3389/fchem.2020.00055] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 01/17/2020] [Indexed: 12/15/2022] Open
Abstract
N-glycosylation of membrane receptors is important for a wide variety of cellular processes. In the immune system, loss or alteration of receptor glycosylation can affect pathogen recognition, cell-cell interaction, and activation as well as migration. This is not only due to aberrant folding of the receptor, but also to altered lateral mobility or aggregation capacity. Despite increasing evidence of their biological relevance, glycosylation-dependent mechanisms of receptor regulation are hard to dissect at the molecular level. This is due to the intrinsic complexity of the glycosylation process and high diversity of glycan structures combined with the technical limitations of the current experimental tools. It is still challenging to precisely determine the localization and site-occupancy of glycosylation sites, glycan micro- and macro-heterogeneity at the individual receptor level as well as the biological function and specific interactome of receptor glycoforms. In addition, the tools available to manipulate N-glycans of a specific receptor are limited. Significant progress has however been made thanks to innovative approaches such as glycoproteomics, metabolic engineering, or chemoenzymatic labeling. By discussing examples of immune receptors involved in pathogen recognition, migration, antigen presentation, and cell signaling, this Mini Review will focus on the biological importance of N-glycosylation for receptor functions and highlight the technical challenges for examination and manipulation of receptor N-glycans.
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Affiliation(s)
- Paola de Haas
- Department of Cell Biology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Wiljan J A J Hendriks
- Department of Cell Biology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Dirk J Lefeber
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands.,Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Alessandra Cambi
- Department of Cell Biology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, Netherlands
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Gilson RC, Gunasinghe SD, Johannes L, Gaus K. Galectin-3 modulation of T-cell activation: mechanisms of membrane remodelling. Prog Lipid Res 2019; 76:101010. [PMID: 31682868 DOI: 10.1016/j.plipres.2019.101010] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 09/24/2019] [Accepted: 09/29/2019] [Indexed: 12/15/2022]
Abstract
Galectin-3 (Gal3) is a multifaceted protein which belongs to a family of lectins and binds β-galactosides. Gal3 expression is altered in many types of cancer, with increased expression generally associated with poor prognosis. Although the mechanisms remain unknown, Gal3 has been implicated in several biological processes involved in cancer progression, including suppression of T cell-mediated immune responses. Extracellular Gal3 binding to the plasma membrane of T cells alters membrane organization and the formation of an immunological synapse. Its multivalent capacity allows Gal3 to interact specifically with different membrane proteins and lipids, influencing endocytosis, trafficking and T cell receptor signalling. The ability of Gal3 to inhibit T cell responses may provide a mechanism by which Gal3 aids in cancer progression. In this review, we seek to give an overview of the mechanisms by which Gal3 alters the spatial organization of cell membranes and how these processes impact on T cell activation.
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Affiliation(s)
- Rebecca C Gilson
- EMBL Australia Node in Single Molecule Science, University of New South Wales, Sydney 2052, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, University of New South Wales, Sydney 2052, Australia
| | - Sachith D Gunasinghe
- EMBL Australia Node in Single Molecule Science, University of New South Wales, Sydney 2052, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, University of New South Wales, Sydney 2052, Australia
| | - Ludger Johannes
- Institut Curie, PSL Research University, Cellular and Chemical Biology unit, UMR3666, CNRS, U1143, INSERM, 26 rue d'Ulm, 75248 Paris Cedex 05, France.
| | - Katharina Gaus
- EMBL Australia Node in Single Molecule Science, University of New South Wales, Sydney 2052, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, University of New South Wales, Sydney 2052, Australia.
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21
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Conceptual Evolution of Cell Signaling. Int J Mol Sci 2019; 20:ijms20133292. [PMID: 31277491 PMCID: PMC6651758 DOI: 10.3390/ijms20133292] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 06/26/2019] [Accepted: 06/28/2019] [Indexed: 12/27/2022] Open
Abstract
During the last 100 years, cell signaling has evolved into a common mechanism for most physiological processes across systems. Although the majority of cell signaling principles were initially derived from hormonal studies, its exponential growth has been supported by interdisciplinary inputs, e.g., from physics, chemistry, mathematics, statistics, and computational fields. As a result, cell signaling has grown out of scope for any general review. Here, we review how the messages are transferred from the first messenger (the ligand) to the receptor, and then decoded with the help of cascades of second messengers (kinases, phosphatases, GTPases, ions, and small molecules such as cAMP, cGMP, diacylglycerol, etc.). The message is thus relayed from the membrane to the nucleus where gene expression ns, subsequent translations, and protein targeting to the cell membrane and other organelles are triggered. Although there are limited numbers of intracellular messengers, the specificity of the response profiles to the ligands is generated by the involvement of a combination of selected intracellular signaling intermediates. Other crucial parameters in cell signaling are its directionality and distribution of signaling strengths in different pathways that may crosstalk to adjust the amplitude and quality of the final effector output. Finally, we have reflected upon its possible developments during the coming years.
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22
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Lee SU, Li CF, Mortales CL, Pawling J, Dennis JW, Grigorian A, Demetriou M. Increasing cell permeability of N-acetylglucosamine via 6-acetylation enhances capacity to suppress T-helper 1 (TH1)/TH17 responses and autoimmunity. PLoS One 2019; 14:e0214253. [PMID: 30913278 PMCID: PMC6435169 DOI: 10.1371/journal.pone.0214253] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 03/08/2019] [Indexed: 12/27/2022] Open
Abstract
N-acetylglucosamine (GlcNAc) branching of Asn (N)-linked glycans inhibits pro-inflammatory T cell responses and models of autoimmune diseases such as Multiple Sclerosis (MS). Metabolism controls N-glycan branching in T cells by regulating de novo hexosamine pathway biosynthesis of UDP-GlcNAc, the donor substrate for the Golgi branching enzymes. Activated T cells switch metabolism from oxidative phosphorylation to aerobic glycolysis and glutaminolysis. This reduces flux of glucose and glutamine into the hexosamine pathway, thereby inhibiting de novo UDP-GlcNAc synthesis and N-glycan branching. Salvage of GlcNAc into the hexosamine pathway overcomes this metabolic suppression to restore UDP-GlcNAc synthesis and N-glycan branching, thereby promoting anti-inflammatory T regulatory (Treg) over pro-inflammatory T helper (TH) 17 and TH1 differentiation to suppress autoimmunity. However, GlcNAc activity is limited by the lack of a cell surface transporter and requires high doses to enter cells via macropinocytosis. Here we report that GlcNAc-6-acetate is a superior pro-drug form of GlcNAc. Acetylation of amino-sugars improves cell membrane permeability, with subsequent de-acetylation by cytoplasmic esterases allowing salvage into the hexosamine pathway. Per- and bi-acetylation of GlcNAc led to toxicity in T cells, whereas mono-acetylation at only the 6 > 3 position raised N-glycan branching greater than GlcNAc without inducing significant toxicity. GlcNAc-6-acetate inhibited T cell activation/proliferation, TH1/TH17 responses and disease progression in Experimental Autoimmune Encephalomyelitis (EAE), a mouse model of MS. Thus, GlcNAc-6-Acetate may provide an improved therapeutic approach to raise N-glycan branching, inhibit pro-inflammatory T cell responses and treat autoimmune diseases such as MS.
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Affiliation(s)
- Sung-Uk Lee
- Department of Neurology, University of California, Irvine, Irvine, California, United States of America
- Glixis Therapeutics, LLC, Santa Rosa, California, United States of America
| | - Carey F. Li
- Department of Neurology, University of California, Irvine, Irvine, California, United States of America
| | - Christie-Lynn Mortales
- Department of Microbiology & Molecular Genetics, University of California, Irvine, Irvine, California, United States of America
| | - Judy Pawling
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - James W. Dennis
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Ani Grigorian
- Glixis Therapeutics, LLC, Santa Rosa, California, United States of America
| | - Michael Demetriou
- Department of Neurology, University of California, Irvine, Irvine, California, United States of America
- Department of Microbiology & Molecular Genetics, University of California, Irvine, Irvine, California, United States of America
- Institute for Immunology, University of California, Irvine, Irvine, California, United States of America
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23
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Dias AM, Pereira MS, Padrão NA, Alves I, Marcos-Pinto R, Lago P, Pinho SS. Glycans as critical regulators of gut immunity in homeostasis and disease. Cell Immunol 2018; 333:9-18. [DOI: 10.1016/j.cellimm.2018.07.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 07/04/2018] [Accepted: 07/17/2018] [Indexed: 12/19/2022]
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24
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Giovannone N, Liang J, Antonopoulos A, Geddes Sweeney J, King SL, Pochebit SM, Bhattacharyya N, Lee GS, Dell A, Widlund HR, Haslam SM, Dimitroff CJ. Galectin-9 suppresses B cell receptor signaling and is regulated by I-branching of N-glycans. Nat Commun 2018; 9:3287. [PMID: 30120234 PMCID: PMC6098069 DOI: 10.1038/s41467-018-05770-9] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 07/26/2018] [Indexed: 12/29/2022] Open
Abstract
Leukocytes are coated with a layer of heterogeneous carbohydrates (glycans) that modulate immune function, in part by governing specific interactions with glycan-binding proteins (lectins). Although nearly all membrane proteins bear glycans, the identity and function of most of these sugars on leukocytes remain unexplored. Here, we characterize the N-glycan repertoire (N-glycome) of human tonsillar B cells. We observe that naive and memory B cells express an N-glycan repertoire conferring strong binding to the immunoregulatory lectin galectin-9 (Gal-9). Germinal center B cells, by contrast, show sharply diminished binding to Gal-9 due to upregulation of I-branched N-glycans, catalyzed by the β1,6-N-acetylglucosaminyltransferase GCNT2. Functionally, we find that Gal-9 is autologously produced by naive B cells, binds CD45, suppresses calcium signaling via a Lyn-CD22-SHP-1 dependent mechanism, and blunts B cell activation. Thus, our findings suggest Gal-9 intrinsically regulates B cell activation and may differentially modulate BCR signaling at steady state and within germinal centers.
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Affiliation(s)
- N Giovannone
- Department of Dermatology, Brigham and Women's Hospital, Boston, MA, 02115, USA
- Harvard Medical School, Boston, MA, 02115, USA
| | - J Liang
- Department of Dermatology, Brigham and Women's Hospital, Boston, MA, 02115, USA
| | - A Antonopoulos
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - J Geddes Sweeney
- Department of Dermatology, Brigham and Women's Hospital, Boston, MA, 02115, USA
- Harvard Medical School, Boston, MA, 02115, USA
| | - S L King
- Department of Dermatology, Brigham and Women's Hospital, Boston, MA, 02115, USA
| | - S M Pochebit
- Harvard Medical School, Boston, MA, 02115, USA
- Department of Pathology, Brigham and Women's Hospital, Boston, MA, 02115, USA
| | - N Bhattacharyya
- Department of Surgery, Division of Otolaryngology, Brigham and Women's Hospital, Boston, MA, 02115, USA
- Department of Otology and Laryngology, Harvard Medical School, Boston, MA, 02115, USA
| | - G S Lee
- Department of Otology and Laryngology, Harvard Medical School, Boston, MA, 02115, USA
| | - A Dell
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK
| | - H R Widlund
- Department of Dermatology, Brigham and Women's Hospital, Boston, MA, 02115, USA
| | - S M Haslam
- Department of Life Sciences, Imperial College London, London, SW7 2AZ, UK.
| | - C J Dimitroff
- Department of Dermatology, Brigham and Women's Hospital, Boston, MA, 02115, USA.
- Harvard Medical School, Boston, MA, 02115, USA.
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25
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Baum LG, Cobb BA. The direct and indirect effects of glycans on immune function. Glycobiology 2018; 27:619-624. [PMID: 28460052 DOI: 10.1093/glycob/cwx036] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 04/21/2017] [Indexed: 12/26/2022] Open
Abstract
The biological impact of glycans is as diverse and complex as the impact of proteins on biology. Familiar roles include those as a protein folding checkpoint in the endoplasmic reticulum and as a modulator of the serum half-life of secreted glycoproteins, but it has become clear over the last several decades that glycans are key signaling moieties, participate in cell-cell interactions and modulate the function of individual proteins, to name but a few examples. In the immune system, the majority of microbial "patterns" are glycans or glycoconjugates, while virtually all cell surface receptors are glycoproteins, and antibody glycosylation critically influences antibody function. In order to provide a simple contextual framework to understand the myriad roles, glycans play in immunity, we propose that glycan effects are considered direct or indirect, depending on their direct participation or their indirect effects on other components in a given biological process or pathway. Here, we present the published evidence that supports this framework, which ultimately leads to the conclusion that we should learn to embrace the complexity inherent to the glycome and its potential as a largely uncharted but target rich area of new therapeutic investigation.
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Affiliation(s)
- Linda G Baum
- Department of Pathology and Laboratory Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Brian A Cobb
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
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26
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Demetriou M, Nabi IR, Dennis JW. Galectins as Adaptors: Linking Glycosylation and Metabolism with Extracellular Cues. TRENDS GLYCOSCI GLYC 2018. [DOI: 10.4052/tigg.1732.1se] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
| | - Ivan R. Nabi
- Department of Cellular and Physiological Sciences, Life Sciences Institute, University of British Columbia
| | - James W. Dennis
- Lunenfeld Tanenbaum Research Institute, Mount Sinai Hospital
- Department of Molecular Genetics, & Department of Laboratory Medicine and Pathology, Department of Medicine, University of Toronto
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27
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Metabolic control of T cell immune response through glycans in inflammatory bowel disease. Proc Natl Acad Sci U S A 2018; 115:E4651-E4660. [PMID: 29720442 DOI: 10.1073/pnas.1720409115] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
) exhibited increased susceptibility to severe forms of colitis and early-onset disease. Importantly, the treatment of these mice with GlcNAc reduced disease severity and suppressed disease progression due to a controlled T cell-mediated immune response at the intestinal mucosa. In conclusion, our human ex vivo and preclinical results demonstrate the targeted-specific immunomodulatory properties of this simple glycan, proposing a therapeutic approach for patients with UC.
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28
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Abstract
Galectins are carbohydrate-binding proteins that are involved in many physiological functions, such as inflammation, immune responses, cell migration, autophagy and signalling. They are also linked to diseases such as fibrosis, cancer and heart disease. How such a small family of only 15 members can have such widespread effects remains a conundrum. In this Cell Science at a Glance article, we summarise recent literature on the many cellular activities that have been ascribed to galectins. As shown on the accompanying poster, these include carbohydrate-independent interactions with cytosolic or nuclear targets and carbohydrate-dependent interactions with extracellular glycoconjugates. We discuss how these intra- and extracellular activities might be linked and point out the importance of unravelling molecular mechanisms of galectin function to gain a true understanding of their contributions to the physiology of the cell. We close with a short outlook on the organismal functions of galectins and a perspective on the major challenges in the field.
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Affiliation(s)
- Ludger Johannes
- Institut Curie, PSL Research University, Cellular and Chemical Biology unit, U1143 INSERM, UMR3666 CNRS, 26 rue d'Ulm, 75248 Paris Cedex 05, France
| | - Ralf Jacob
- Philipps-Universität Marburg, Institut für Zytobiologie, Robert-Koch-Str. 6, 35037 Marburg, Germany
| | - Hakon Leffler
- Sect. MIG (Microbiology, Immunology, Glycobiology), Dept Laboratory Medicine, Lund University, POB 117, 22100 Lund, Sweden
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29
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Gordon-Alonso M, Hirsch T, Wildmann C, van der Bruggen P. Galectin-3 captures interferon-gamma in the tumor matrix reducing chemokine gradient production and T-cell tumor infiltration. Nat Commun 2017; 8:793. [PMID: 28986561 PMCID: PMC5630615 DOI: 10.1038/s41467-017-00925-6] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Accepted: 08/07/2017] [Indexed: 01/15/2023] Open
Abstract
The presence of T cells in tumors predicts overall survival for cancer patients. However, why most tumors are poorly infiltrated by T cells is barely understood. T-cell recruitment towards the tumor requires a chemokine gradient of the critical IFNγ-induced chemokines CXCL9/10/11. Here, we describe how tumors can abolish IFNγ-induced chemokines, thereby reducing T-cell attraction. This mechanism requires extracellular galectin-3, a lectin secreted by tumors. Galectins bind the glycans of glycoproteins and form lattices by oligomerization. We demonstrate that galectin-3 binds the glycans of the extracellular matrix and those decorating IFNγ. In mice bearing human tumors, galectin-3 reduces IFNγ diffusion through the tumor matrix. Galectin antagonists increase intratumoral IFNγ diffusion, CXCL9 gradient and tumor recruitment of adoptively transferred human CD8+ T cells specific for a tumor antigen. Transfer of T cells reduces tumor growth only if galectin antagonists are injected. Considering that most human cytokines are glycosylated, galectin secretion could be a general strategy for tumor immune evasion. Most tumours are poorly infiltrated by T cells. Here the authors show that galectin-3 secreted by tumours binds both glycosylated IFNγ and glycoproteins of the tumour extracellular matrix, thus avoiding IFNγ diffusion and the formation of an IFNγ-induced chemokine gradient required for T cell infiltration.
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Affiliation(s)
- Monica Gordon-Alonso
- Ludwig Institute for Cancer Research, de Duve Institute, Université catholique de Louvain, Avenue Hippocrate 74, 1200, Brussels, Belgium. .,WELBIO, Avenue Hippocrate 74, 1200, Brussels, Belgium.
| | - Thibault Hirsch
- Ludwig Institute for Cancer Research, de Duve Institute, Université catholique de Louvain, Avenue Hippocrate 74, 1200, Brussels, Belgium
| | - Claude Wildmann
- Ludwig Institute for Cancer Research, de Duve Institute, Université catholique de Louvain, Avenue Hippocrate 74, 1200, Brussels, Belgium.,WELBIO, Avenue Hippocrate 74, 1200, Brussels, Belgium
| | - Pierre van der Bruggen
- Ludwig Institute for Cancer Research, de Duve Institute, Université catholique de Louvain, Avenue Hippocrate 74, 1200, Brussels, Belgium. .,WELBIO, Avenue Hippocrate 74, 1200, Brussels, Belgium.
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30
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Abstract
Immune cell function and fate are intimately linked to engagement of metabolic pathways. The contribution of core metabolic pathways to immune cell bioenergetics has been vigorously investigated in recent years. However, precisely how other peripheral metabolic pathways support immune cells beyond energy generation is less well understood. Here we survey the literature and highlight recent advances in our understanding of several ancillary metabolic pathways and how they support processes beyond ATP production and ultimately contribute to protective immunity.
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Affiliation(s)
- Daniel J Puleston
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, Freiburg 79108, Germany; Nuffield Department of Orthopedics, Rheumatology, and Musculoskeletal Diseases, The Kennedy Institute of Rheumatology, University of Oxford, Roosevelt Drive, Oxford OX3 7FY, UK
| | - Matteo Villa
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, Freiburg 79108, Germany
| | - Erika L Pearce
- Department of Immunometabolism, Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, Freiburg 79108, Germany.
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31
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Tumor-derived factors affecting immune cells. Cytokine Growth Factor Rev 2017; 36:79-87. [PMID: 28606733 DOI: 10.1016/j.cytogfr.2017.06.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 06/06/2017] [Indexed: 12/30/2022]
Abstract
Tumor progression is accompanied by the production of a wide array of immunosuppressive factors by tumor and non-tumor cells forming the tumor microenvironment. These factors belonging to cytokines, growth factors, metabolites, glycan-binding proteins and glycoproteins are responsible for the establishment of immunosuppressive networks leading towards tumor promotion, invasion and metastasis. In pre-clinical tumor models, the inactivation of some of these suppressive networks reprograms the phenotypic and functional features of tumor-infiltrating immune cells, ultimately favoring effective anti-tumor immune responses. We will discuss factors and mechanisms identified in both mouse and human tumors, and the possibility to associate drugs inhibiting these mechanisms with new immunotherapy strategies already entered in the clinical practice.
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32
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Translating the ‘Sugar Code’ into Immune and Vascular Signaling Programs. Trends Biochem Sci 2017; 42:255-273. [DOI: 10.1016/j.tibs.2016.11.003] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 11/07/2016] [Accepted: 11/10/2016] [Indexed: 12/21/2022]
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33
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Galectins: emerging regulatory checkpoints linking tumor immunity and angiogenesis. Curr Opin Immunol 2017; 45:8-15. [PMID: 28088061 DOI: 10.1016/j.coi.2016.12.003] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 12/06/2016] [Accepted: 12/24/2016] [Indexed: 01/27/2023]
Abstract
Immune checkpoints, a plethora of inhibitory pathways aimed at maintaining immune cell homeostasis, may be co-opted by cancer cells to evade immune destruction. Therapies targeting immune checkpoints have reached a momentum yielding significant clinical benefits in patients with various malignancies by unleashing anti-tumor immunity. Galectins, a family of glycan-binding proteins, have emerged as novel regulatory checkpoints that promote immune evasive programs by inducing T-cell exhaustion, limiting T-cell survival, favoring expansion of regulatory T cells, de-activating natural killer cells and polarizing myeloid cells toward an immunosuppressive phenotype. Concomitantly, galectins can trigger vascular signaling programs, serving as bifunctional messengers that couple tumor immunity and angiogenesis. Thus, targeting galectin-glycan interactions may halt tumor progression by simultaneously augmenting antitumor immunity and suppressing aberrant angiogenesis.
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34
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Araujo L, Khim P, Mkhikian H, Mortales CL, Demetriou M. Glycolysis and glutaminolysis cooperatively control T cell function by limiting metabolite supply to N-glycosylation. eLife 2017; 6. [PMID: 28059703 PMCID: PMC5257256 DOI: 10.7554/elife.21330] [Citation(s) in RCA: 134] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 01/05/2017] [Indexed: 12/28/2022] Open
Abstract
Rapidly proliferating cells switch from oxidative phosphorylation to aerobic glycolysis plus glutaminolysis, markedly increasing glucose and glutamine catabolism. Although Otto Warburg first described aerobic glycolysis in cancer cells >90 years ago, the primary purpose of this metabolic switch remains controversial. The hexosamine biosynthetic pathway requires glucose and glutamine for de novo synthesis of UDP-GlcNAc, a sugar-nucleotide that inhibits receptor endocytosis and signaling by promoting N-acetylglucosamine branching of Asn (N)-linked glycans. Here, we report that aerobic glycolysis and glutaminolysis co-operatively reduce UDP-GlcNAc biosynthesis and N-glycan branching in mouse T cell blasts by starving the hexosamine pathway of glucose and glutamine. This drives growth and pro-inflammatory TH17 over anti-inflammatory-induced T regulatory (iTreg) differentiation, the latter by promoting endocytic loss of IL-2 receptor-α (CD25). Thus, a primary function of aerobic glycolysis and glutaminolysis is to co-operatively limit metabolite supply to N-glycan biosynthesis, an activity with widespread implications for autoimmunity and cancer. DOI:http://dx.doi.org/10.7554/eLife.21330.001
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Affiliation(s)
- Lindsey Araujo
- Department of Microbiology and Molecular Genetics, University of California, Irvine, United States
| | - Phillip Khim
- Department of Neurology and Institute for Immunology, University of California, Irvine, United States
| | - Haik Mkhikian
- Department of Pathology and Laboratory Medicine, University of California, Irvine, United States
| | - Christie-Lynn Mortales
- Department of Microbiology and Molecular Genetics, University of California, Irvine, United States
| | - Michael Demetriou
- Department of Neurology and Institute for Immunology, University of California, Irvine, United States
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35
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Changede R, Sheetz M. Integrin and cadherin clusters: A robust way to organize adhesions for cell mechanics. Bioessays 2016; 39:1-12. [PMID: 27930828 DOI: 10.1002/bies.201600123] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Recent studies at the nanometer scale have revealed that relatively uniform clusters of adhesion proteins (50-100 nm) constitute the modular units of cell adhesion sites in both cell-matrix and cell-cell adhesions. Super resolution microscopy and membrane protein diffusion studies both suggest that even large focal adhesions are formed of 100 nm clusters that are loosely aggregated. Clusters of 20-50 adhesion molecules (integrins or cadherins) can support large forces through avidity binding interactions but can also be disassembled or endocytosed rapidly. Assembly of the clusters of integrins is force-independent and involves gathering integrins at ligand binding sites where they are stabilized by cytoplasmic adhesion proteins that crosslink the integrin cytoplasmic tails plus connect the clusters to the cell cytoskeleton. Cooperative-signaling events can occur in a single cluster without cascading to other clusters. Thus, the clusters appear to be very important elements in many cellular processes and can be considered as a critical functional module.
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Affiliation(s)
- Rishita Changede
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
| | - Michael Sheetz
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
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36
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Blouin CM, Hamon Y, Gonnord P, Boularan C, Kagan J, Viaris de Lesegno C, Ruez R, Mailfert S, Bertaux N, Loew D, Wunder C, Johannes L, Vogt G, Contreras FX, Marguet D, Casanova JL, Galès C, He HT, Lamaze C. Glycosylation-Dependent IFN-γR Partitioning in Lipid and Actin Nanodomains Is Critical for JAK Activation. Cell 2016; 166:920-934. [PMID: 27499022 DOI: 10.1016/j.cell.2016.07.003] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 04/21/2016] [Accepted: 07/05/2016] [Indexed: 02/04/2023]
Abstract
Understanding how membrane nanoscale organization controls transmembrane receptors signaling activity remains a challenge. We studied interferon-γ receptor (IFN-γR) signaling in fibroblasts from homozygous patients with a T168N mutation in IFNGR2. By adding a neo-N-glycan on IFN-γR2 subunit, this mutation blocks IFN-γ activity by unknown mechanisms. We show that the lateral diffusion of IFN-γR2 is confined by sphingolipid/cholesterol nanodomains. In contrast, the IFN-γR2 T168N mutant diffusion is confined by distinct actin nanodomains where conformational changes required for Janus-activated tyrosine kinase/signal transducer and activator of transcription (JAK/STAT) activation by IFN-γ could not occur. Removing IFN-γR2 T168N-bound galectins restored lateral diffusion in lipid nanodomains and JAK/STAT signaling in patient cells, whereas adding galectins impaired these processes in control cells. These experiments prove the critical role of dynamic receptor interactions with actin and lipid nanodomains and reveal a new function for receptor glycosylation and galectins. Our study establishes the physiological relevance of membrane nanodomains in the control of transmembrane receptor signaling in vivo. VIDEO ABSTRACT.
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Affiliation(s)
- Cédric M Blouin
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France
| | - Yannick Hamon
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, Inserm, CNRS, Marseille, France
| | - Pauline Gonnord
- Centre de Physiologie Toulouse-Purpan (CPTP), INSERM U1043, 31300 Toulouse, France
| | - Cédric Boularan
- Institut des Maladies Métaboliques et Cardiovasculaires, Université Toulouse III Paul Sabatier, INSERM U1048, 31432 Toulouse, France
| | - Jérémy Kagan
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France
| | | | - Richard Ruez
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France
| | - Sébastien Mailfert
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, Inserm, CNRS, Marseille, France
| | - Nicolas Bertaux
- Institut Fresnel, Aix Marseille Université, Centrale Marseille, CNRS, Marseille, France
| | - Damarys Loew
- Proteomics and Mass Spectrometry Laboratory, Institut Curie, PSL Research University, 75005 Paris, France
| | - Christian Wunder
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France
| | - Ludger Johannes
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France
| | - Guillaume Vogt
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY 10065, USA; Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Necker Hospital for Sick Children, Imagine Institute, INSERM UMR1163, 75015 Paris, France; University Paris Descartes, 75006 Paris, France
| | - Francesc-Xabier Contreras
- Instituto Biofísica (UPV/EHU, CSIC), P.O. Box 644, 48080 Bilbao, Spain; Departamento de Bioquímica y Biologia Molecular, Universidad del País Vasco, P.O. Box 644, 48080 Bilbao, Spain; IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
| | - Didier Marguet
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, Inserm, CNRS, Marseille, France
| | - Jean-Laurent Casanova
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY 10065, USA; Laboratory of Human Genetics of Infectious Diseases, Necker Branch, Necker Hospital for Sick Children, Imagine Institute, INSERM UMR1163, 75015 Paris, France; University Paris Descartes, 75006 Paris, France; Howard Hughes Medical Institute, New York, NY 10065, USA; Pediatric Hematology-Immunology Unit, Necker Hospital for Sick Children, 75015 Paris, France
| | - Céline Galès
- Institut des Maladies Métaboliques et Cardiovasculaires, Université Toulouse III Paul Sabatier, INSERM U1048, 31432 Toulouse, France
| | - Hai-Tao He
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, Inserm, CNRS, Marseille, France.
| | - Christophe Lamaze
- Institut Curie, PSL Research University, CNRS UMR3666, INSERM U1143, 75005 Paris, France.
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A major secretory defect of tumour-infiltrating T lymphocytes due to galectin impairing LFA-1-mediated synapse completion. Nat Commun 2016; 7:12242. [PMID: 27447355 PMCID: PMC4961845 DOI: 10.1038/ncomms12242] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 06/15/2016] [Indexed: 12/20/2022] Open
Abstract
Surface galectin has been shown to contribute to dysfunctions of human tumour-infiltrating lymphocytes (TILs). We show here that galectin-covered CD8 TILs produce normal amounts of intracellular cytokines, but fail to secrete them because of defective actin rearrangements at the synapse. The non-secreting TILs also display reduced adhesion to their targets, together with defective LFA-1 recruitment and activation at the synapse. These defects are relieved by releasing surface galectin. As mild LFA-1 blockade on normal blood T cells emulate the defects of galectin-covered TILs, we conclude that galectin prevents the formation of a functional secretory synapse by preventing optimal LFA-1 triggering. Our results highlight a major secretory defect of TILs that is not revealed by widely used intracellular cytokine immunomonitoring assays. They also provide additional insights into the T-cell response, by showing that different thresholds of LFA-1 triggering are required to promote the intracellular production of cytokines and their secretion. Galectin-3 is a sugar-binding protein that can inhibit antitumour cytotoxic immunity. Here the authors show that Galectin-3 expressed by tumour cells inhibits LFA-1 on cytotoxic lymphocytes, impairing immunological synapse formation, IFNg secretion, and target cell killing.
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38
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Mattila PK, Batista FD, Treanor B. Dynamics of the actin cytoskeleton mediates receptor cross talk: An emerging concept in tuning receptor signaling. J Cell Biol 2016; 212:267-80. [PMID: 26833785 PMCID: PMC4748574 DOI: 10.1083/jcb.201504137] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Recent evidence implicates the actin cytoskeleton in the control of receptor signaling. This may be of particular importance in the context of immune receptors, such as the B cell receptor, where dysregulated signaling can result in autoimmunity and malignancy. Here, we discuss the role of the actin cytoskeleton in controlling receptor compartmentalization, dynamics, and clustering as a means to regulate receptor signaling through controlling the interactions with protein partners. We propose that the actin cytoskeleton is a point of integration for receptor cross talk through modulation of protein dynamics and clustering. We discuss the implication of this cross talk via the cytoskeleton for both ligand-induced and low-level constitutive (tonic) signaling necessary for immune cell survival.
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Affiliation(s)
- Pieta K Mattila
- Institute of Biomedicine, MediCity, University of Turku, 20520 Turku, Finland
| | - Facundo D Batista
- Lymphocyte Interaction Laboratory, The Francis Crick Institute, Cancer Research UK, London WC2A 3LY, England, UK
| | - Bebhinn Treanor
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario M5T 1C6, Canada
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39
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Fernández MM, Ferragut F, Cárdenas Delgado VM, Bracalente C, Bravo AI, Cagnoni AJ, Nuñez M, Morosi LG, Quinta HR, Espelt MV, Troncoso MF, Wolfenstein-Todel C, Mariño KV, Malchiodi EL, Rabinovich GA, Elola MT. Glycosylation-dependent binding of galectin-8 to activated leukocyte cell adhesion molecule (ALCAM/CD166) promotes its surface segregation on breast cancer cells. Biochim Biophys Acta Gen Subj 2016; 1860:2255-68. [PMID: 27130882 DOI: 10.1016/j.bbagen.2016.04.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 03/27/2016] [Accepted: 04/23/2016] [Indexed: 11/16/2022]
Abstract
BACKGROUND We previously demonstrated that the activated leukocyte cell adhesion molecule (ALCAM/CD166) can interact with galectin-8 (Gal-8) in endothelial cells. ALCAM is a member of the immunoglobulin superfamily that promotes homophilic and heterophilic cell-cell interactions. Gal-8 is a "tandem-repeat"-type galectin, known as a matricellular protein involved in cell adhesion. Here, we analyzed the physical interaction between both molecules in breast cancer cells and the functional relevance of this phenomenon. METHODS We performed binding assays by surface plasmon resonance to study the interaction between Gal-8 and the recombinant glycosylated ALCAM ectodomain or endogenous ALCAM from MDA-MB-231 breast cancer cells. We also analyzed the binding of ALCAM-silenced or control breast cancer cells to immobilized Gal-8 by SPR. In internalization assays, we evaluated the influence of Gal-8 on ALCAM surface localization. RESULTS We showed that recombinant glycosylated ALCAM and endogenous ALCAM from breast carcinoma cells physically interacted with Gal-8 in a glycosylation-dependent fashion displaying a differential behavior compared to non-glycosylated ALCAM. Moreover, ALCAM-silenced breast cancer cells exhibited reduced binding to Gal-8 relative to control cells. Importantly, exogenously added Gal-8 provoked ALCAM segregation, probably trapping this adhesion molecule at the surface of breast cancer cells. CONCLUSIONS Our data indicate that Gal-8 interacts with ALCAM at the surface of breast cancer cells through glycosylation-dependent mechanisms. GENERAL SIGNIFICANCE A novel heterophilic interaction between ALCAM and Gal-8 is demonstrated here, suggesting its physiologic relevance in the biology of breast cancer cells.
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Affiliation(s)
- Marisa M Fernández
- Institute of Studies in Humoral Immunology, University of Buenos Aires (UBA) and National Council Research (CONICET), Microbiology, Immunology and Biotechnology Department, School of Pharmacy and Biochemistry, University of Buenos Aires (UBA), Buenos Aires, Argentina
| | - Fátima Ferragut
- Institute of Biochemistry and Biophysics (IQUIFIB), UBA-CONICET, Biological Chemistry Department, School of Pharmacy and Biochemistry, UBA, Buenos Aires, Argentina
| | - Víctor M Cárdenas Delgado
- Institute of Biochemistry and Biophysics (IQUIFIB), UBA-CONICET, Biological Chemistry Department, School of Pharmacy and Biochemistry, UBA, Buenos Aires, Argentina
| | - Candelaria Bracalente
- Institute of Biochemistry and Biophysics (IQUIFIB), UBA-CONICET, Biological Chemistry Department, School of Pharmacy and Biochemistry, UBA, Buenos Aires, Argentina
| | - Alicia I Bravo
- Molecular Pathology Department, "Eva Perón" HIGA Hospital, Buenos Aires, Argentina
| | - Alejandro J Cagnoni
- Laboratory of Functional and Molecular Glycomics, Institute of Biology and Experimental Medicine (IBYME), CONICET, Buenos Aires, Argentina
| | - Myriam Nuñez
- Department of Mathematics and Statistics, School of Pharmacy and Biochemistry, UBA, Buenos Aires, Argentina
| | - Luciano G Morosi
- Laboratory of Functional and Molecular Glycomics, Institute of Biology and Experimental Medicine (IBYME), CONICET, Buenos Aires, Argentina; Laboratory of Immunopathology, IBYME, CONICET, Buenos Aires, Argentina
| | - Héctor R Quinta
- Institute of Biochemistry and Biophysics (IQUIFIB), UBA-CONICET, Biological Chemistry Department, School of Pharmacy and Biochemistry, UBA, Buenos Aires, Argentina
| | - María V Espelt
- Institute of Biochemistry and Biophysics (IQUIFIB), UBA-CONICET, Biological Chemistry Department, School of Pharmacy and Biochemistry, UBA, Buenos Aires, Argentina
| | - María F Troncoso
- Institute of Biochemistry and Biophysics (IQUIFIB), UBA-CONICET, Biological Chemistry Department, School of Pharmacy and Biochemistry, UBA, Buenos Aires, Argentina
| | - Carlota Wolfenstein-Todel
- Institute of Biochemistry and Biophysics (IQUIFIB), UBA-CONICET, Biological Chemistry Department, School of Pharmacy and Biochemistry, UBA, Buenos Aires, Argentina
| | - Karina V Mariño
- Laboratory of Functional and Molecular Glycomics, Institute of Biology and Experimental Medicine (IBYME), CONICET, Buenos Aires, Argentina
| | - Emilio L Malchiodi
- Institute of Studies in Humoral Immunology, University of Buenos Aires (UBA) and National Council Research (CONICET), Microbiology, Immunology and Biotechnology Department, School of Pharmacy and Biochemistry, University of Buenos Aires (UBA), Buenos Aires, Argentina
| | - Gabriel A Rabinovich
- Laboratory of Immunopathology, IBYME, CONICET, Buenos Aires, Argentina; Faculty of Exact and Natural Sciences, UBA, Buenos Aires, Argentina
| | - María T Elola
- Institute of Biochemistry and Biophysics (IQUIFIB), UBA-CONICET, Biological Chemistry Department, School of Pharmacy and Biochemistry, UBA, Buenos Aires, Argentina.
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Thiemann S, Man JH, Chang MH, Lee B, Baum LG. Galectin-1 regulates tissue exit of specific dendritic cell populations. J Biol Chem 2015. [PMID: 26216879 PMCID: PMC4566239 DOI: 10.1074/jbc.m115.644799] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
During inflammation, dendritic cells emigrate from inflamed tissue across the lymphatic endothelium into the lymphatic vasculature and travel to regional lymph nodes to initiate immune responses. However, the processes that regulate dendritic cell tissue egress and migration across the lymphatic endothelium are not well defined. The mammalian lectin galectin-1 is highly expressed by vascular endothelial cells in inflamed tissue and has been shown to regulate immune cell tissue entry into inflamed tissue. Here, we show that galectin-1 is also highly expressed by human lymphatic endothelial cells, and deposition of galectin-1 in extracellular matrix selectively regulates migration of specific human dendritic cell subsets. The presence of galectin-1 inhibits migration of immunogenic dendritic cells through the extracellular matrix and across lymphatic endothelial cells, but it has no effect on migration of tolerogenic dendritic cells. The major galectin-1 counter-receptor on both dendritic cell populations is the cell surface mucin CD43; differential core 2 O-glycosylation of CD43 between immunogenic dendritic cells and tolerogenic dendritic cells appears to contribute to the differential effect of galectin-1 on migration. Binding of galectin-1 to immunogenic dendritic cells reduces phosphorylation and activity of the protein-tyrosine kinase Pyk2, an effect that may also contribute to reduced migration of this subset. In a murine lymphedema model, galectin-1(-/-) animals had increased numbers of migratory dendritic cells in draining lymph nodes, specifically dendritic cells with an immunogenic phenotype. These findings define a novel role for galectin-1 in inhibiting tissue emigration of immunogenic, but not tolerogenic, dendritic cells, providing an additional mechanism by which galectin-1 can dampen immune responses.
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Affiliation(s)
- Sandra Thiemann
- From the Departments of Pathology and Laboratory Medicine and
| | - Jeanette H Man
- From the Departments of Pathology and Laboratory Medicine and
| | - Margaret H Chang
- Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at UCLA, Los Angeles, California 90095 and
| | - Benhur Lee
- From the Departments of Pathology and Laboratory Medicine and Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at UCLA, Los Angeles, California 90095 and the Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York 10029
| | - Linda G Baum
- From the Departments of Pathology and Laboratory Medicine and
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41
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Assembly, organization and regulation of cell-surface receptors by lectin–glycan complexes. Biochem J 2015; 469:1-16. [DOI: 10.1042/bj20150461] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Galectins are a family of β-galactoside-binding lectins carrying at least one consensus sequence in the carbohydrate-recognition domain. Properties of glycosylated ligands, such as N- and O-glycan branching, LacNAc (N-acetyl-lactosamine) content and the balance of α2,3- and α2,6-linked sialic acid dramatically influence galectin binding to a preferential set of counter-receptors. The presentation of specific glycans in galectin-binding partners is also critical, as proper orientation and clustering of oligosaccharide ligands on multiple carbohydrate side chains increase the binding avidity of galectins for particular glycosylated receptors. When galectins are released from the cells, they typically concentrate on the cell surface and the local matrix, raising their local concentration. Thus galectins can form their own multimers in the extracellular milieu, which in turn cross-link glycoconjugates on the cell surface generating galectin–glycan complexes that modulate intracellular signalling pathways, thus regulating cellular processes such as apoptosis, proliferation, migration and angiogenesis. Subtle changes in receptor expression, rates of protein synthesis, activities of Golgi enzymes, metabolite concentrations supporting glycan biosynthesis, density of glycans, strength of protein–protein interactions at the plasma membrane and stoichiometry may modify galectin–glycan complexes. Although galectins are key contributors to the formation of these extended glycan complexes leading to promotion of receptor segregation/clustering, and inhibition of receptor internalization by surface retention, when these complexes are disrupted, some galectins, particularly galectin-3 and -4, showed the ability to drive clathrin-independent mechanisms of endocytosis. In the present review, we summarize the data available on the assembly, hierarchical organization and regulation of conspicuous galectin–glycan complexes, and their implications in health and disease.
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Abstract
Galectins are a family of widely expressed β-galactoside-binding lectins in metazoans. The 15 mammalian galectins have either one or two conserved carbohydrate recognition domains (CRDs), with galectin-3 being able to pentamerize; they form complexes that crosslink glycosylated ligands to form a dynamic lattice. The galectin lattice regulates the diffusion, compartmentalization and endocytosis of plasma membrane glycoproteins and glycolipids. The galectin lattice also regulates the selection, activation and arrest of T cells, receptor kinase signaling and the functionality of membrane receptors, including the glucagon receptor, glucose and amino acid transporters, cadherins and integrins. The affinity of transmembrane glycoproteins to the galectin lattice is proportional to the number and branching of their N-glycans; with branching being mediated by Golgi N-acetylglucosaminyltransferase-branching enzymes and the supply of UDP-GlcNAc through metabolite flux through the hexosamine biosynthesis pathway. The relative affinities of glycoproteins for the galectin lattice depend on the activities of the Golgi enzymes that generate the epitopes of their ligands and, thus, provide a means to analyze biological function of lectins and of the 'glycome' more broadly.
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Affiliation(s)
- Ivan R Nabi
- Department of Cellular and Physiological Sciences, Life Sciences Institute, 2350 Health Sciences Mall, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z3
| | - Jay Shankar
- Department of Cellular and Physiological Sciences, Life Sciences Institute, 2350 Health Sciences Mall, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z3
| | - James W Dennis
- Department of Medical Genetics and Laboratory Medicine and Pathology, University of Toronto, Toronto, Ontario, Canada M5G 1L5
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Lhuillier C, Barjon C, Niki T, Gelin A, Praz F, Morales O, Souquere S, Hirashima M, Wei M, Dellis O, Busson P. Impact of Exogenous Galectin-9 on Human T Cells: CONTRIBUTION OF THE T CELL RECEPTOR COMPLEX TO ANTIGEN-INDEPENDENT ACTIVATION BUT NOT TO APOPTOSIS INDUCTION. J Biol Chem 2015; 290:16797-811. [PMID: 25947381 DOI: 10.1074/jbc.m115.661272] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Indexed: 11/06/2022] Open
Abstract
Galectin-9 (gal-9) is a multifunctional β-galactoside-binding lectin, frequently released in the extracellular medium, where it acts as a pleiotropic immune modulator. Despite its overall immunosuppressive effects, a recent study has reported bimodal action of gal-9 on human resting blood T cells with apoptosis occurring in the majority of them, followed by a wave of activation and expansion of Th1 cells in the surviving population. Our knowledge of the signaling events triggered by exogenous gal-9 in T cells remains limited. One of these events is cytosolic calcium (Ca(2+)) release reported in some murine and human T cells. The aim of this study was to investigate the contribution of Ca(2+) mobilization to apoptotic and nonapoptotic effects of exogenous gal-9 in human T cells. We found that the T cell receptor (TCR)-CD3 complex and the Lck kinase were required for Ca(2+) mobilization but not for apoptosis induction in Jurkat cells. These data were confirmed in human CD4(+) T cells from peripheral blood as follows: a specific Lck chemical inhibitor abrogated Ca(2+) mobilization but not apoptosis induction. Moreover, Lck activity was also required for the production of Th1-type cytokines, i.e. interleukin-2 and interferon-γ, which resulted from gal-9 stimulation in peripheral CD4(+) T cells. These findings indicate that gal-9 acts on T cells by two distinct pathways as follows: one mimicking antigen-specific activation of the TCR with a mandatory contribution of proximal elements of the TCR complex, especially Lck, and another resulting in apoptosis that is independent of this complex.
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Affiliation(s)
- Claire Lhuillier
- From the Université Paris-Sud, 15 Rue Georges Clémenceau, 91400, Orsay, France, the CNRS, UMR 8126, Institut Gustave Roussy, 114 Rue Edouard Vaillant, 94805 Villejuif Cedex, France, the Cellvax, Ecole Nationale Vétérinaire d'Alfort, 7 Avenue du Général de Gaulle, 94704 Maisons-Alfort Cedex, France
| | - Clément Barjon
- From the Université Paris-Sud, 15 Rue Georges Clémenceau, 91400, Orsay, France, the CNRS, UMR 8126, Institut Gustave Roussy, 114 Rue Edouard Vaillant, 94805 Villejuif Cedex, France, the Cellvax, Ecole Nationale Vétérinaire d'Alfort, 7 Avenue du Général de Gaulle, 94704 Maisons-Alfort Cedex, France
| | - Toshiro Niki
- the Department of Immunology and Immunopathology, Faculty of Medicine, Kagawa University, Kagawa 761-0793, Japan, the GalPharma Co., Ltd., Takamatsu, Kagawa 761-0301, Japan
| | - Aurore Gelin
- the CNRS, UMR 8126, Institut Gustave Roussy, 114 Rue Edouard Vaillant, 94805 Villejuif Cedex, France
| | - Françoise Praz
- INSERM, UMR-S 938, Centre de Recherche Saint-Antoine, 75012, Paris, France, the Sorbonne Universités, UPMC Université Paris 06, UMR-S 938, Centre de Recherche Saint-Antoine, 75012, Paris, France
| | - Olivier Morales
- CNRS, UMR 8161 Groupe IRCV, Institut de Biologie de Lille, 1 Rue du Pr. Calmette, 59021 Lille, France
| | - Sylvie Souquere
- From the Université Paris-Sud, 15 Rue Georges Clémenceau, 91400, Orsay, France, UMR 8122, Institut Gustave Roussy, 114 Rue Edouard Vaillant, 94805 Villejuif Cedex, France, and
| | - Mitsuomi Hirashima
- the Department of Immunology and Immunopathology, Faculty of Medicine, Kagawa University, Kagawa 761-0793, Japan, the GalPharma Co., Ltd., Takamatsu, Kagawa 761-0301, Japan
| | - Ming Wei
- the Cellvax, Ecole Nationale Vétérinaire d'Alfort, 7 Avenue du Général de Gaulle, 94704 Maisons-Alfort Cedex, France
| | - Olivier Dellis
- From the Université Paris-Sud, 15 Rue Georges Clémenceau, 91400, Orsay, France, INSERM, UMR-S 757, Bâtiment 440/443, Rue des Adèles, 91405 Orsay, France
| | - Pierre Busson
- From the Université Paris-Sud, 15 Rue Georges Clémenceau, 91400, Orsay, France, the CNRS, UMR 8126, Institut Gustave Roussy, 114 Rue Edouard Vaillant, 94805 Villejuif Cedex, France,
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Chen Y, Ding L, Xu J, Song W, Yang M, Hu J, Ju H. Micro-competition system for Raman quantification of multiple glycans on intact cell surface. Chem Sci 2015; 6:3769-3774. [PMID: 29218146 PMCID: PMC5707490 DOI: 10.1039/c5sc01031d] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Accepted: 04/30/2015] [Indexed: 12/02/2022] Open
Abstract
A micro-competition system integrated functionalized silica bubbles and Raman encoded nanoprobes to simultaneously assay multiple glycans on intact cell surfaces.
A micro-competition system is designed for simultaneous quantification of multiple glycans on intact cell surfaces, by integrating two-surface–one-molecule competition with surface enhanced Raman scattering (SERS). The micro-competition is achieved among multiple-polysaccharide-coated gold nanostars functionalized silica bubbles, target cells and gold nanoprobes at a micron scale. The gold nanoprobes are prepared by coating distinct Raman molecules and lectins on gold nanoparticles for signal resolution and glycan recognition, respectively. The silica bubble surface serves as an artificial glycan surface and a SERS substrate. Upon the competitive recognition of lectin to the corresponding glycan, the gold nanoprobes can be specifically captured by the bubbles and cells in a homogeneous system, and the amounts of different gold nanoprobes on bubbles are simultaneously detected by SERS to reflect the corresponding glycan amounts on the cell surface. This micro-competition system with multiple quantification capability provides a powerful tool for investigation of the complex glycan-related biological processes.
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Affiliation(s)
- Yunlong Chen
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P.R. China . ; ; Tel: +86 25 83593593
| | - Lin Ding
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P.R. China . ; ; Tel: +86 25 83593593
| | - Junqiang Xu
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P.R. China . ; ; Tel: +86 25 83593593
| | - Wanyao Song
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P.R. China . ; ; Tel: +86 25 83593593
| | - Min Yang
- Department of Pharmaceutical & Biological Chemistry , UCL School of Pharmacy , University College London , London WC1N 1AX , UK
| | - Junjie Hu
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P.R. China . ; ; Tel: +86 25 83593593
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P.R. China . ; ; Tel: +86 25 83593593
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Arad U, Madar-Balakirski N, Angel-Korman A, Amir S, Tzadok S, Segal O, Menachem A, Gold A, Elkayam O, Caspi D. Galectin-3 is a sensor-regulator of toll-like receptor pathways in synovial fibroblasts. Cytokine 2015; 73:30-5. [PMID: 25689620 DOI: 10.1016/j.cyto.2015.01.016] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 01/08/2015] [Accepted: 01/21/2015] [Indexed: 12/19/2022]
Abstract
Galectin-3 is a β-galactoside-binding lectin that plays an important role in the modulation of immune responses. It has been shown to aggravate joint inflammation and destruction in experimental arthritis. We investigated the role of galectin-3 in TLR-induced cell activation in human synovial fibroblasts (SF) in order to better understand the mechanism(s) of the proinflammatory function of galectin-3 in arthritis. Galectin-3 expression in SF obtained from rheumatoid arthritis and osteoarthritis patients was inhibited by siRNA mediated gene-knockdown. Galectin-3 was also inhibited with modified citrus pectin (MCP), a polysaccharide galectin-3 ligand. Galectin-3 knockdown inhibited TLR-2, -3 and -4-induced IL-6 secretion, but not TLR-2, -3 and -4-mediated matrix metalloproteinase-3 or CC chemokine ligand-5 secretion. When the SF were stimulated with phorbol 12-myristate 13-acetate, a protein kinase C activator that bypasses the membranal receptors, galectin-3 knockdown no longer influenced IL-6 secretion. MCP reduced IL-6 levels in a dose-dependent manner. Our results indicate that galectin-3 is a positive sensor-regulator of TLR-induced IL-6 secretion in human synovial fibroblasts, thus adding new insights into the mechanisms by which galectin-3 augments synovial inflammation. These findings corroborate the potential role of glycan inhibitors of galectin-3 as a therapeutic approach for the treatment of inflammatory arthritis.
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Affiliation(s)
- Uri Arad
- Department of Rheumatology, Tel Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel Aviv University, Israel.
| | - Noa Madar-Balakirski
- Department of Rheumatology, Tel Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Avital Angel-Korman
- Department of Rheumatology, Tel Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Sharon Amir
- Department of Rheumatology, Tel Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Sharon Tzadok
- Department of Rheumatology, Tel Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Ortal Segal
- Division of Orthopedics, Tel Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Aharon Menachem
- Division of Orthopedics, Tel Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Aviram Gold
- Division of Orthopedics, Tel Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Ori Elkayam
- Department of Rheumatology, Tel Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Dan Caspi
- Department of Rheumatology, Tel Aviv Sourasky Medical Center and the Sackler Faculty of Medicine, Tel Aviv University, Israel
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Cyto-sensing in electrochemical lab-on-paper cyto-device for in-situ evaluation of multi-glycan expressions on cancer cells. Biosens Bioelectron 2015; 63:232-239. [DOI: 10.1016/j.bios.2014.07.046] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/16/2014] [Accepted: 07/19/2014] [Indexed: 12/12/2022]
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47
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N-glycosylation bidirectionally extends the boundaries of thymocyte positive selection by decoupling Lck from Ca²⁺ signaling. Nat Immunol 2014; 15:1038-45. [PMID: 25263124 DOI: 10.1038/ni.3007] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Accepted: 09/09/2014] [Indexed: 12/13/2022]
Abstract
Positive selection of diverse yet self-tolerant thymocytes is vital to immunity and requires a limited degree of T cell antigen receptor (TCR) signaling in response to self peptide-major histocompatibility complexes (self peptide-MHCs). Affinity of newly generated TCR for peptide-MHC primarily sets the boundaries for positive selection. We report that N-glycan branching of TCR and the CD4 and CD8 coreceptors separately altered the upper and lower affinity boundaries from which interactions between peptide-MHC and TCR positively select T cells. During thymocyte development, N-glycan branching varied approximately 15-fold. N-glycan branching was required for positive selection and decoupled Lck signaling from TCR-driven Ca(2+) flux to simultaneously promote low-affinity peptide-MHC responses while inhibiting high-affinity ones. Therefore, N-glycan branching imposes a sliding scale on interactions between peptide-MHC and TCR that bidirectionally expands the affinity range for positive selection.
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Mendez-Huergo SP, Maller SM, Farez MF, Mariño K, Correale J, Rabinovich GA. Integration of lectin–glycan recognition systems and immune cell networks in CNS inflammation. Cytokine Growth Factor Rev 2014; 25:247-55. [DOI: 10.1016/j.cytogfr.2014.02.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 02/24/2014] [Indexed: 12/26/2022]
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Adaptive immune activation: glycosylation does matter. Nat Chem Biol 2014; 9:776-84. [PMID: 24231619 DOI: 10.1038/nchembio.1403] [Citation(s) in RCA: 221] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 10/22/2013] [Indexed: 12/13/2022]
Abstract
Major histocompatibility complex (MHC) class I and II are glycoproteins that can present antigenic peptides at the cell surface for recognition and activation of circulating T lymphocytes. Here, the importance of the modification of protein antigens by glycans on cellular uptake, proteolytic processing, presentation by MHC and subsequent T-cell priming is reviewed. Antigen glycosylation is important for a number of diseases and vaccine design. All of the key proteins involved in antigen recognition and the orchestration of downstream effector functions are glycosylated. The influence of protein glycosylation on immune function and disease is covered.
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Chen Y, Ding L, Liu T, Ju H. Arrayed Profiling of Multiple Glycans on Whole Living Cell Surfaces. Anal Chem 2013; 85:11153-8. [DOI: 10.1021/ac403150n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yunlong Chen
- State Key Laboratory of Analytical
Chemistry for Life Science, Department of Chemistry, Nanjing University, Nanjing, Jiangsu 210093, P. R. China
| | - Lin Ding
- State Key Laboratory of Analytical
Chemistry for Life Science, Department of Chemistry, Nanjing University, Nanjing, Jiangsu 210093, P. R. China
| | - Tingting Liu
- State Key Laboratory of Analytical
Chemistry for Life Science, Department of Chemistry, Nanjing University, Nanjing, Jiangsu 210093, P. R. China
| | - Huangxian Ju
- State Key Laboratory of Analytical
Chemistry for Life Science, Department of Chemistry, Nanjing University, Nanjing, Jiangsu 210093, P. R. China
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