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Gentilini MV, Pérez ME, Fernández PM, Fainboim L, Arana E. The tumor antigen N-glycolyl-GM3 is a human CD1d ligand capable of mediating B cell and natural killer T cell interaction. Cancer Immunol Immunother 2016; 65:551-62. [PMID: 26969612 PMCID: PMC11028607 DOI: 10.1007/s00262-016-1812-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 02/17/2016] [Indexed: 02/07/2023]
Abstract
The expression of N-glycolyl-monosialodihexosyl-ganglioside (NGcGM3) in humans is restricted to cancer cells; therefore, it is a tumor antigen. There are measurable quantities of circulating anti-NGcGM3 antibodies (aNGcGM3 Abs) in human serum. Interestingly, some people have circulating Ag-specific immunoglobulins G (IgGs) that are capable of complement mediated cytotoxicity against NGcGM3 positive cells, which is relevant for tumor surveillance. In light of the chemical nature of Ag, we postulated it as a candidate ligand for CD1d. Furthermore, we hypothesize that the immune mechanism involved in the generation of these Abs entails cross talk between B lymphocytes (Bc) and invariant natural killer T cells (iNKT). Combining cellular techniques, such as flow cytometry and biochemical assays, we demonstrated that CD1d binds to NGcGM3 and that human Bc present NGcGM3 in a CD1d context according to two alternative strategies. We also showed that paraformaldehyde treatment of cells expressing CD1d affects the presentation. Finally, by co-culturing primary human Bc with iNKT and measuring Ki-67 expression, we detected a reproducible increment in the proliferation of the iNKT population when Ag was on the medium. Our findings identify a novel, endogenous, human CD1d ligand, which is sufficiently competent to stimulate iNKT. We postulate that CD1d-restricted Bc presentation of NGcGM3 drives effective iNKT activation, an immunological mechanism that has not been previously described for humans, which may contribute to understanding aNGcGM3 occurrence.
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Affiliation(s)
- M Virginia Gentilini
- Institute of Immunology, Genetics and Metabolism (INIGEM), Clinical Hospital, University of Buenos Aires, National Council for Scientific and Technological Research, Av Córdoba 2351, C1120AAF, Buenos Aires, Argentina
| | - M Eugenia Pérez
- Institute of Immunology, Genetics and Metabolism (INIGEM), Clinical Hospital, University of Buenos Aires, National Council for Scientific and Technological Research, Av Córdoba 2351, C1120AAF, Buenos Aires, Argentina
- Department of Immunogenetics, School of Exact Sciences, University of Misiones, Posadas, Misiones, Argentina
| | - Pablo Mariano Fernández
- Institute of Immunology, Genetics and Metabolism (INIGEM), Clinical Hospital, University of Buenos Aires, National Council for Scientific and Technological Research, Av Córdoba 2351, C1120AAF, Buenos Aires, Argentina
- Department of Immunology, School of Medicine, University of Buenos Aires, Buenos Aires, Argentina
| | - Leonardo Fainboim
- Institute of Immunology, Genetics and Metabolism (INIGEM), Clinical Hospital, University of Buenos Aires, National Council for Scientific and Technological Research, Av Córdoba 2351, C1120AAF, Buenos Aires, Argentina
- Department of Immunology, School of Medicine, University of Buenos Aires, Buenos Aires, Argentina
| | - Eloísa Arana
- Institute of Immunology, Genetics and Metabolism (INIGEM), Clinical Hospital, University of Buenos Aires, National Council for Scientific and Technological Research, Av Córdoba 2351, C1120AAF, Buenos Aires, Argentina.
- Department of Immunology, School of Medicine, University of Buenos Aires, Buenos Aires, Argentina.
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Zarei M, Muthing J, Peter-Katalinic J, Bindila L. Separation and identification of GM1b pathway Neu5Ac- and Neu5Gc gangliosides by on-line nanoHPLC-QToF MS and tandem MS: toward glycolipidomics screening of animal cell lines. Glycobiology 2009; 20:118-26. [DOI: 10.1093/glycob/cwp154] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Dreisewerd K, Müthing J, Rohlfing A, Meisen I, Vukelić Z, Peter-Katalinić J, Hillenkamp F, Berkenkamp S. Analysis of gangliosides directly from thin-layer chromatography plates by infrared matrix-assisted laser desorption/ionization orthogonal time-of-flight mass spectrometry with a glycerol matrix. Anal Chem 2007; 77:4098-107. [PMID: 15987115 DOI: 10.1021/ac048373w] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel method is presented for direct coupling of high-performance thin-layer chromatography (HPTLC) with matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) for the analysis of biomolecules. A first key feature is the use of a liquid matrix (glycerol), which provides a homogeneous wetting of the silica gel and a simple and fast MALDI preparation protocol. A second is the use of an Er:YAG infrared laser, which ablates layers of approximately 10-microm thickness of analyte-loaded silica gel and provides a soft desorption/ionization of even very labile analyte molecules. The orthogonal time-of-flight mass spectrometer employed in this study, finally provides a high accuracy of the mass determination, which is independent of any irregularity of the silica gel surface. The analytical potential of the method is demonstrated by the compositional mapping of a native GM3 (II(3)-alpha-Neu5Ac-LacCer) ganglioside mixture from cultured Chinese hamster ovary cells. The analysis is characterized by a high relative sensitivity, allowing the simultaneous detection of various major and minor GM3 species directly from individual HPTLC analyte bands. The lateral resolution of the direct HPTLC-MALDI-MS analysis is defined by the laser focus diameter of currently approximately 200 microm. This allows one to determine mobility profiles of individual species with a higher resolution than by reading off the chromatogram by optical absorption. The fluorescent dye primuline was, furthermore, successfully tested as a nondestructive, MALDI-compatible staining agent.
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Affiliation(s)
- Klaus Dreisewerd
- Institute of Medical Physics and Biophysics, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany.
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Kurosu M, Kitagawa I. Ganglioside GM3Derivatives with Truncated Ceramide Moiety: Facial Synthesis and Inhibitory Activity against KB Cell Growth. J Carbohydr Chem 2006. [DOI: 10.1080/07328300600803518] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Müthing J, Burg M. Characterization of cytosolic sialidase from Chinese hamster ovary cells: part II. Substrate specificity for gangliosides. Carbohydr Res 2001; 330:347-56. [PMID: 11270813 DOI: 10.1016/s0008-6215(00)00295-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Cytosolic Chinese hamster ovary (CHO) cell sialidase has been cloned as a soluble glutathione S-transferase (GST)-sialidase fusion protein with an apparent molecular weight of 69 kD in Escherichia coli. The enzyme has then been produced in mg quantities at 25-L bioreactor scale and purified by one-step affinity chromatography on glutathione sepharose (Burg, M.; Müthing, J. Carbohydr. Res. 2001, 330, 335-346). The cloned sialidase was probed for desialylation of a wide spectrum of different types of gangliosides using a thin-layer chromatography (TLC) overlay kinetic assay. Different gangliosides were separated on silica gel precoated TLC plates, incubated with increasing concentrations of sialidase (50 degreesU/mL up to 1.6 mU/mL) without detergents, and desialylated gangliosides were detected with specific anti-asialoganglioside antibodies. The enzyme exhibited almost identical hydrolysis activity in degradation of GM3(Neu5Ac) and GM3(Neu5Gc). A slightly enhanced activity, compared with reference Vibrio cholerae sialidase, was detected towards terminally alpha(2-3)-sialylated neolacto-series gangliosides IV3-alpha-Neu5Ac-nLc4Cer and VI3-alpha-Neu5Ac-nLc6Cer. The ganglio-series gangliosides G(D1a), G(D1b), and G(T1b), the preferential substrates of V. cholerae sialidase for generating cleavage-resistant G(M1), were less suitable targets for the CHO cell sialidase. The increasing evidence on colocalization of gangliosides and sialidase in the cytosol strongly suggests the involvement of the cytosolic sialidase in ganglioside metabolism on intracellular level by yet unknown mechanisms.
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Affiliation(s)
- J Müthing
- Institute of Cell Culture Technology, Faculty of Technology, University of Bielefeld, Germany.
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Mauri L, Casellato R, Kirschner G, Sonnino S. A procedure for the preparation of GM3 ganglioside from GM1-lactone. Glycoconj J 1999; 16:197-203. [PMID: 10596894 DOI: 10.1023/a:1007072203345] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A simple procedure is described for preparing GM3 ganglioside, from a few milligrams to grams, from GM1-lactone (Sonnino et al., (1985) Glycoconjugate J 2: 343-54) [1]. The synthesis was carried out under the following optimal conditions: 30 mM GM1-lactone in 0.25 M H2SO4 in DMSO, 30 min, 70 degrees C, nitrogen atmosphere, strong stirring. The yield of GM3 was 55%. The procedure applied to milligram amounts of GD1b-dilactone gave GD3 ganglioside.
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Affiliation(s)
- L Mauri
- Study Center for the Functional Biochemistry of Brain Lipids, Department of Medical Chemistry and Biochemistry - LITA-Segrate, The Medical School, University of Milan, Milano, Italy
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