1
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Pončáková T, Fábian M, Martinková M, Novotná M, Fabišíková M, Tvrdoňová M, Pilátová MB, Nosálová N, Kuchár J, Jáger D, Litecká M. Stereoselective synthesis and anticancer profile of C-alkyl pyrrolidine-diols with a sphingoid base-like backbone. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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2
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Romanò C, Clausen MH. Chemical Biology of αGalCer: a Chemist’s Toolbox for the Stimulation of Invariant Natural Killer T (iNKT) Cells. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Cecilia Romanò
- Technical University of Denmark: Danmarks Tekniske Universitet Department of Chemisty Kemitorvet 207 2800 Kgs. Lyngby DENMARK
| | - Mads Hartvig Clausen
- Technical University of Denmark Department of Chemistry Kemitorvet, Building 201 2800 Kgs. Lyngby DENMARK
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3
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Cheng JMH, Chee SH, Dölen Y, Verdoes M, Timmer MSM, Stocker BL. An efficient synthesis of a 6″-BODIPY-α-Galactosylceramide probe for monitoring α-Galactosylceramide uptake by cells. Carbohydr Res 2019; 486:107840. [PMID: 31689579 DOI: 10.1016/j.carres.2019.107840] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 10/14/2019] [Accepted: 10/15/2019] [Indexed: 01/07/2023]
Abstract
Herein, an efficient synthesis of BODIPY-α-Galactosylceramide 3, which can be used to study the cellular uptake of the potent immunostimulatory parent compound α-Galactosylceramide, is reported. Key in our synthetic strategy is the six-step synthesis of the core BODIPY scaffold (64% yield overall) and its quantitative conversion to an N-hydroxysuccinimidyl ester to facilitate conjugation and purification of the target glycolipid. For the preparation of the core of the glycolipid, the solubility of the lipid acceptor proved to be critical. The ability of BODIPY-αGalCer 3 to activate invariant natural killer cells was then demonstrated in vitro.
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Affiliation(s)
- Janice M H Cheng
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
| | - Stephanie H Chee
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
| | - Yusuf Dölen
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 26, 6525, GA, Nijmegen, the Netherlands
| | - Martijn Verdoes
- Department of Tumor Immunology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Geert Grooteplein 26, 6525, GA, Nijmegen, the Netherlands
| | - Mattie S M Timmer
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand.
| | - Bridget L Stocker
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
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4
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DeLyria ES, Zhou D, Lee JS, Singh S, Song W, Li F, Sun Q, Lu H, Wu J, Qiao Q, Hu Y, Zhang G, Li C, Sastry KJ, Shen H. Sublingual injection of microparticles containing glycolipid ligands for NKT cells and subunit vaccines induces antibody responses in oral cavity. Carbohydr Res 2015; 405:87-92. [PMID: 25555750 DOI: 10.1016/j.carres.2014.11.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 10/10/2014] [Accepted: 11/14/2014] [Indexed: 12/13/2022]
Abstract
Natural Killer T (NKT) cells are a unique type of innate immune cells which exert paradoxical roles in animal models through producing either Th1 or Th2 cytokines and activating dendritic cells. Alpha-galactosylceramide (αGalCer), a synthetic antigen for NKT cells, was found to be safe and immune stimulatory in cancer and hepatitis patients. We recently developed microparticle-formulated αGalCer, which is selectively presented by dendritic cells and macrophages, but not B cells, and thus can avoid the anergy of NKT cells. In this study, we have examined the immunogenicity of microparticles containing αGalCer and protein vaccine components through sublingual injection in mice. The results showed that sublingual injection of microparticles containing αGalCer and ovalbumin triggered IgG responses in serum (titer >1:100,000), which persisted for more than 3months. Microparticles containing ovalbumin alone also induced comparable level of IgG responses. However, immunoglobulin subclass analysis showed that sublingually injected microparticles containing αGalCer and ovalbumin induced 20 fold higher Th1 biased antibody (IgG2c) than microparticles containing OVA alone (1:20,000 as compared to 1:1000 titer). Sublingual injection of microparticles containing αGalCer and ovalbumin induced secretion of both IgG (titer >1:1000) and IgA (titer=1:80) in saliva secretion, while microparticles containing ovalbumin alone only induced secretion of IgG in saliva. Our results suggest that sublingual injection of microparticles and their subsequent trafficking to draining lymph nodes may induce adaptive immune responses in mucosal compartments. Ongoing studies are focused on the mechanism of antigen presentation and lymphocyte biology in the oral cavity, as well as the toxicity and efficacy of these candidate microparticles for future applications.
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Affiliation(s)
- Elizabeth S DeLyria
- Department of Melanoma Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Dapeng Zhou
- Shanghai Pulmonary Hospital, Tongji University, School of Medicine, Shanghai, China.
| | - Jun Soo Lee
- Department of Melanoma Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Shailbala Singh
- Department of Immunology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Wei Song
- Department of Melanoma Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States; Shanghai Public Health Clinical Center, Shanghai, China
| | - Fenge Li
- Department of Melanoma Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Qing Sun
- Department of Melanoma Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Hongzhou Lu
- Shanghai Public Health Clinical Center, Shanghai, China
| | - Jinhui Wu
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Qian Qiao
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Yiqiao Hu
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, China
| | - Guodong Zhang
- Department of Nanomedicine, The Methodist Hospital Research Institute, Houston, TX, United States
| | - Chun Li
- Department of Experimental Diagnostic Imaging, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - K Jagannadha Sastry
- Department of Immunology, The University of Texas M.D. Anderson Cancer Center, Houston, TX, United States
| | - Haifa Shen
- Department of Nanomedicine, The Methodist Hospital Research Institute, Houston, TX, United States
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5
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Nilsson I, Michalik D, Silipo A, Molinaro A, Vogel C. Efficient synthesis of O-antigen fragments expressed by Burkholderia anthina by modular synthesis approach. Carbohydr Res 2015; 404:98-107. [DOI: 10.1016/j.carres.2014.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 10/30/2014] [Accepted: 11/17/2014] [Indexed: 12/22/2022]
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6
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Stocker BL, Timmer MS. Trehalose diesters, lipoteichoic acids and α-GalCer: using chemistry to understand immunology. Carbohydr Res 2014; 389:3-11. [DOI: 10.1016/j.carres.2013.08.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 08/29/2013] [Accepted: 08/31/2013] [Indexed: 10/26/2022]
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7
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Pérez-Labrada K, Brouard I, Méndez I, Pérez CS, Gavín JA, Rivera DG. Combined Ugi-4CR/CuAAC Approach to Triazole-Based Neoglycolipids. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402117] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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8
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Ishida J, Hinou H, Naruchi K, Nishimura SI. Synthesis of neoglycosphingolipid from methoxyamino-functionalized ceramide. Bioorg Med Chem Lett 2014; 24:1197-200. [DOI: 10.1016/j.bmcl.2013.12.091] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 12/19/2013] [Accepted: 12/20/2013] [Indexed: 01/03/2023]
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9
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Anderson BL, Teyton L, Bendelac A, Savage PB. Stimulation of natural killer T cells by glycolipids. Molecules 2013; 18:15662-88. [PMID: 24352021 PMCID: PMC4018217 DOI: 10.3390/molecules181215662] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 12/11/2013] [Accepted: 12/11/2013] [Indexed: 01/31/2023] Open
Abstract
Natural killer T (NKT) cells are a subset of T cells that recognize glycolipid antigens presented by the CD1d protein. The initial discovery of immunostimulatory glycolipids from a marine sponge and the T cells that respond to the compounds has led to extensive research by chemists and immunologists to understand how glycolipids are recognized, possible responses by NKT cells, and the structural features of glycolipids necessary for stimulatory activity. The presence of this cell type in humans and most mammals suggests that it plays critical roles in antigen recognition and the interface between innate and adaptive immunity. Both endogenous and exogenous natural antigens for NKT cells have been identified, and it is likely that glycolipid antigens remain to be discovered. Multiple series of structurally varied glycolipids have been synthesized and tested for stimulatory activity. The structural features of glycolipids necessary for NKT cell stimulation are moderately well understood, and designed compounds have proven to be much more potent antigens than their natural counterparts. Nevertheless, control over NKT cell responses by designed glycolipids has not been optimized, and further research will be required to fully reveal the therapeutic potential of this cell type.
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Affiliation(s)
| | | | | | - Paul B Savage
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA.
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10
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Stocker BL, Timmer MSM. Chemical Tools for Studying the Biological Function of Glycolipids. Chembiochem 2013; 14:1164-84. [DOI: 10.1002/cbic.201300064] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Indexed: 01/04/2023]
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11
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Jervis P, Polzella P, Wojno J, Jukes JP, Ghadbane H, Garcia
Diaz YR, Besra GS, Cerundolo V, Cox LR. Design, synthesis, and functional activity of labeled CD1d glycolipid agonists. Bioconjug Chem 2013; 24:586-94. [PMID: 23458425 PMCID: PMC3630740 DOI: 10.1021/bc300556e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 02/21/2013] [Indexed: 02/01/2023]
Abstract
Invariant natural killer T cells (iNKT cells) are restricted by CD1d molecules and activated upon CD1d-mediated presentation of glycolipids to T cell receptors (TCRs) located on the surface of the cell. Because the cytokine response profile is governed by the structure of the glycolipid, we sought a method for labeling various glycolipids to study their in vivo behavior. The prototypical CD1d agonist, α-galactosyl ceramide (α-GalCer) 1, instigates a powerful immune response and the generation of a wide range of cytokines when it is presented to iNKT cell TCRs by CD1d molecules. Analysis of crystal structures of the TCR-α-GalCer-CD1d ternary complex identified the α-methylene unit in the fatty acid side chain, and more specifically the pro-S hydrogen at this position, as a site for incorporating a label. We postulated that modifying the glycolipid in this way would exert a minimal impact on the TCR-glycolipid-CD1d ternary complex, allowing the labeled molecule to function as a good mimic for the CD1d agonist under investigation. To test this hypothesis, the synthesis of a biotinylated version of the CD1d agonist threitol ceramide (ThrCer) was targeted. Both diastereoisomers, epimeric at the label tethering site, were prepared, and functional experiments confirmed the importance of substituting the pro-S, and not the pro-R, hydrogen with the label for optimal activity. Significantly, functional experiments revealed that biotinylated ThrCer (S)-10 displayed behavior comparable to that of ThrCer 5 itself and also confirmed that the biotin residue is available for streptavidin and antibiotin antibody recognition. A second CD1d agonist, namely α-GalCer C20:2 4, was modified in a similar way, this time with a fluorescent label. The labeled α-GalCer C20:2 analogue (11) again displayed functional behavior comparable to that of its unlabeled substrate, supporting the notion that the α-methylene unit in the fatty acid amide chain should be a suitable site for attaching a label to a range of CD1d agonists. The flexibility of the synthetic strategy, and late-stage incorporation of the label, opens up the possibility of using this labeling approach to study the in vivo behavior of a wide range of CD1d agonists.
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MESH Headings
- Animals
- Antigens, CD1d/chemistry
- Antigens, CD1d/drug effects
- Antigens, CD1d/immunology
- Cells, Cultured
- Cytokines/analysis
- Cytokines/biosynthesis
- Cytokines/immunology
- Drug Design
- Galactosylceramides/chemistry
- Galactosylceramides/immunology
- Galactosylceramides/pharmacology
- Humans
- Mice
- Mice, Inbred C57BL
- Models, Molecular
- Molecular Conformation
- Natural Killer T-Cells/chemistry
- Natural Killer T-Cells/drug effects
- Natural Killer T-Cells/immunology
- Receptors, Antigen, T-Cell/chemistry
- Receptors, Antigen, T-Cell/immunology
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Affiliation(s)
- Peter
J. Jervis
- School of Chemistry, University
of Birmingham, Edgbaston, Birmingham B15
2TT, U.K
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15
2TT, U.K
| | - Paolo Polzella
- Medical Research
Council Human
Immunology Unit, Nuffield Department of Medicine, Weatherall Institute
of Molecular Medicine, University of Oxford, Oxford OX3 9DS, U.K
| | - Justyna Wojno
- School of Chemistry, University
of Birmingham, Edgbaston, Birmingham B15
2TT, U.K
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15
2TT, U.K
| | - John-Paul Jukes
- Medical Research
Council Human
Immunology Unit, Nuffield Department of Medicine, Weatherall Institute
of Molecular Medicine, University of Oxford, Oxford OX3 9DS, U.K
| | - Hemza Ghadbane
- Medical Research
Council Human
Immunology Unit, Nuffield Department of Medicine, Weatherall Institute
of Molecular Medicine, University of Oxford, Oxford OX3 9DS, U.K
| | - Yoel R. Garcia
Diaz
- School of Chemistry, University
of Birmingham, Edgbaston, Birmingham B15
2TT, U.K
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15
2TT, U.K
| | - Gurdyal S. Besra
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15
2TT, U.K
| | - Vincenzo Cerundolo
- Medical Research
Council Human
Immunology Unit, Nuffield Department of Medicine, Weatherall Institute
of Molecular Medicine, University of Oxford, Oxford OX3 9DS, U.K
| | - Liam R. Cox
- School of Chemistry, University
of Birmingham, Edgbaston, Birmingham B15
2TT, U.K
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12
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Pérez-Labrada K, Brouard I, Méndez I, Rivera DG. Multicomponent Synthesis of Ugi-Type Ceramide Analogues and Neoglycolipids from Lipidic Isocyanides. J Org Chem 2012; 77:4660-70. [DOI: 10.1021/jo300462m] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Karell Pérez-Labrada
- Institute
of Pharmacy and Food, University of Havana, San Lázaro y L, 10400,
La Habana, Cuba
- Instituto de Productos Naturales y Agrobiología-C.S.I.C., Avda. Astrofísico
Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
- Center for Natural Products Study,
Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana, Cuba
| | - Ignacio Brouard
- Instituto de Productos Naturales y Agrobiología-C.S.I.C., Avda. Astrofísico
Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Inmaculada Méndez
- Instituto de Productos Naturales y Agrobiología-C.S.I.C., Avda. Astrofísico
Francisco Sánchez 3, 38206 La Laguna, Tenerife, Spain
| | - Daniel G. Rivera
- Center for Natural Products Study,
Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana, Cuba
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13
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Synthesis of amino core compounds of galactosyl phytosyl ceramide analogs for developing iNKT-cell inducers. Molecules 2012; 17:3058-81. [PMID: 22410417 PMCID: PMC6268237 DOI: 10.3390/molecules17033058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 03/01/2012] [Accepted: 03/06/2012] [Indexed: 11/17/2022] Open
Abstract
1-Aminophytosphingosine and 6-aminogalactosyl phytosphingosine were prepared in 61% and 40% yield libraries with 44 carboxylic acids showed that a 4-butylbenzoic acid-derived product exe, respectively. Glycosylation using benzoyl-protected lipid resulted in better a-selectivity for ceramide analogs, but the yield was less than that obtained with benzyl moieties. Screening the amide rted less cytotoxicity. These analogs were purified for validation of immunological potencies and the a-GalCer analog but not the sphingosine analog stimulated human iNKT cell population.
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14
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Towards multivalent CD1d ligands: synthesis and biological activity of homodimeric α-galactosyl ceramide analogues. Carbohydr Res 2012; 356:152-62. [PMID: 22445102 PMCID: PMC3413882 DOI: 10.1016/j.carres.2012.02.034] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Accepted: 02/28/2012] [Indexed: 11/21/2022]
Abstract
A library of dimeric CD1d ligands, containing two α-galactosyl ceramide (α-GalCer) units linked by spacers of varying lengths has been synthesised. The key dimerisation reactions were carried out via copper-catalysed click reactions between a 6"-azido-6"-deoxy-α-galactosyl ceramide derivative and various diynes. Each α-GalCer dimer was tested for its ability to stimulate iNKT cells.
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15
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An improved synthesis of dansylated α-galactosylceramide and its use as a fluorescent probe for the monitoring of glycolipid uptake by cells. Carbohydr Res 2011; 346:914-26. [DOI: 10.1016/j.carres.2011.02.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 02/14/2011] [Accepted: 02/15/2011] [Indexed: 11/19/2022]
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16
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Jervis PJ, Cox LR, Besra GS. Synthesis of a versatile building block for the preparation of 6-N-derivatized α-galactosyl ceramides: rapid access to biologically active glycolipids. J Org Chem 2010; 76:320-3. [PMID: 21155575 PMCID: PMC3018865 DOI: 10.1021/jo102064p] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
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A concise route to the 6-azido-6-deoxy-α-galactosyl-phytosphingosine derivative 9 is reported. Orthogonal protection of the two amino groups allows elaboration of 9 into a range of 6-N-derivatized α-galactosyl ceramides by late-stage introduction of the acyl chain of the ceramide and the 6-N-group in the sugar headgroup. Biologically active glycolipids 6 and 8 have been synthesized to illustrate the applicability of the approach.
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Affiliation(s)
- Peter J Jervis
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
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17
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Khaja SD, Kumar V, Ahmad M, Xue J, Matta KL. Novel galactosyl donor with 2-naphthylmethyl (NAP) as the non participating group at C-2 position: Efficient synthesis of alpha-galactosyl ceramide. Tetrahedron Lett 2010; 51:4411-4414. [PMID: 20730042 DOI: 10.1016/j.tetlet.2010.06.071] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Predominant alpha-linked products can be generated in glycosylation involving galactosyl trichloroacetimidate donors with 2-naphthylmethyl (NAP) as the non participating group at C-2 position. The above donor was successfully utilized for the synthesis of alpha-galactosyl ceramide.
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Affiliation(s)
- Sirajud D Khaja
- Cancer Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
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18
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Veerapen N, Reddington F, Bricard G, Porcelli SA, Besra GS. Synthesis and biological activity of alpha-L-fucosyl ceramides, analogues of the potent agonist, alpha-D-galactosyl ceramide KRN7000. Bioorg Med Chem Lett 2010; 20:3223-6. [PMID: 20462758 PMCID: PMC2957807 DOI: 10.1016/j.bmcl.2010.04.079] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Revised: 04/15/2010] [Accepted: 04/16/2010] [Indexed: 12/02/2022]
Abstract
Several L-fucoglycolipids are associated with diseases such as cancer, cystic fibrosis and rheumatoid arthritis. Activation of iNKT cells is known to lead to the production of cytokines that can help alleviate or exacerbate these conditions. alpha-Galactosyl ceramide (alpha-GalCer) is a known agonist of iNKT cells and it is believed that its fucosyl counterpart might have similar immunogenic properties. We herein report the synthesis of alpha-L-fucosyl ceramide derivatives and describe their biological evaluation. The key challenge in the synthesis of the target molecules involved the stereoselective synthesis of the alpha-glycosidic linkage. Of the methods examined, the per-TMS-protected glycosyl iodide donor was completely alpha-selective, and could be scaled up to provide gram quantities of the azide precursor 11, from which a range of N-acylated alpha-L-fucosyl ceramides were readily obtained and evaluated for ex vivo expansion of human iNKT cells.
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Affiliation(s)
- Natacha Veerapen
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Faye Reddington
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Gabriel Bricard
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Steven A. Porcelli
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Gurdyal S. Besra
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
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