1
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Cameron G, Cheng JMH, Godfrey DI, Timmer MSM, Stocker BL, Dangerfield EM. The NKT cell TCR repertoire can accommodate structural modifications to the lipid and orientation of the terminal carbohydrate of iGb3. RSC Adv 2022; 12:18493-18500. [PMID: 35799937 PMCID: PMC9215340 DOI: 10.1039/d2ra02373c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 06/09/2022] [Indexed: 12/04/2022] Open
Abstract
Isoglobotrihexosylceramide (iGb3) is a known NKT cell agonist, however the specific interactions required to trigger NKT cell TCR activation in response to this mammalian glycolipid are not fully understood. Here we report the synthesis of 1,3-β-Gal-LacCer (βG-iGb3) that displays a β-linked terminal sugar. βG-iGb3 activated NKT cells to a similar extent as iGb3 with a terminal α-linkage, indicating that the conformation of the terminal sugar residue of iGb3 is not essential to facilitate NKT cell TCR recognition. In addition, the immunological activity of four recently described iGb3 analogues with modifications to their terminal sugar or lipid backbone were also investigated. These iGb3 analogues all induced NKT cell proliferation, with IL-13 the predominate cytokine detected. This highlights the ability of the NKT cell TCR to accommodate variations in iGb3-based glycolipids and suggests that undiscovered NKT cell ligands may exist within the lacto-series of mammalian glycosphingolipids. The synthesised βG-iGb3 glycolipid, with a terminal 1,3-β linked galactose, induced NKT cell proliferation indicating that the α conformation of the terminal sugar residue of iGb3 is not essential for NKT cell TCR recognition.![]()
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Affiliation(s)
- Garth Cameron
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Victoria 3000, Australia
| | - Janice M. H. Cheng
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
| | - Dale I. Godfrey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Victoria 3000, Australia
| | - Mattie S. M. Timmer
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
- Centre for Biodiscovery, 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
- Centre for Biodiscovery, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
| | - Emma M. Dangerfield
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
- Centre for Biodiscovery, Victoria University of Wellington, PO Box 600, 6140, Wellington, New Zealand
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2
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Robinson SA, Yau J, Terabe M, Berzofsky JA, Painter GF, Compton BJ, Larsen DS. Synthetic preparation and immunological evaluation of β-mannosylceramide and related N-acyl analogues. Org Biomol Chem 2020; 18:2739-2746. [PMID: 32219267 DOI: 10.1039/d0ob00223b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The synthesis of the invariant natural killer (iNK) T cell agonist β-mannosylceramide along with a series of fatty amide analogues is reported. Of the six β-glycosylation protocols investigated, the sulfoxide methodology developed by Crich and co-workers proved to be the most effective where the reaction of a mannosyl sulfoxide and phytosphingosine derivative gave a key glycolipid intermediate as a 95 : 5 mixture of β- to α-anomers in high yield. A series of mannosyl ceramides were evaluated for their ability to activate D32.D3 NKT cells and induce antitumour activity.
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Affiliation(s)
- Sage A Robinson
- Department of Chemistry, University of Otago, Dunedin, New Zealand.
| | - Jessica Yau
- Vaccine Branch, Centre for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
| | - Masaki Terabe
- Vaccine Branch, Centre for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
| | - Jay A Berzofsky
- Vaccine Branch, Centre for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA
| | - Gavin F Painter
- Ferrier Research Institute, Victoria University of Wellington, Wellington, New Zealand.
| | - Benjamin J Compton
- Ferrier Research Institute, Victoria University of Wellington, Wellington, New Zealand.
| | - David S Larsen
- Department of Chemistry, University of Otago, Dunedin, New Zealand.
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3
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Jain VK, Ramapanicker R. Diastereoselective synthesis of D-threo-sphinganine, L-erythro-sphinganine and (−)-spisulosine through asymmetric α-hydroxylation of a higher homologue of Garner's aldehyde. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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4
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Xiao Z, Guo Y, Liu Y, Li L, Zhang Q, Wen L, Wang X, Kondengaden SM, Wu Z, Zhou J, Cao X, Li X, Ma C, Wang PG. Chemoenzymatic Synthesis of a Library of Human Milk Oligosaccharides. J Org Chem 2016; 81:5851-65. [PMID: 27305319 PMCID: PMC5953189 DOI: 10.1021/acs.joc.6b00478] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Human milk oligosaccharides (HMOs) are a family of diverse unconjugated glycans that exist in human milk as one of the major components. Characterization, quantification, and biofunctional studies of HMOs remain a great challenge due to their diversity and complexity. The accessibility of a homogeneous HMO library is essential to solve these issues which have beset academia for several decades. In this study, an efficient chemoenzymatic strategy, namely core synthesis/enzymatic extension (CSEE), for rapid production of diverse HMOs was reported. On the basis of 3 versatile building blocks, 3 core structures were chemically synthesized via consistent use of oligosaccharyl thioether and oligosaccharyl bromide as glycosylation donors in a convergent fragment coupling strategy. Each of these core structures was then extended to up to 11 HMOs by 4 robust glycosyltransferases. A library of 31 HMOs were chemoenzymatically synthesized and characterized by MS and NMR. CSEE indeed provides a practical approach to harvest structurally defined HMOs for various applications.
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Affiliation(s)
| | | | - Yunpeng Liu
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Lei Li
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Qing Zhang
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Liuqing Wen
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Xuan Wang
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Shukkoor Muhammed Kondengaden
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Zhigang Wu
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Jun Zhou
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Xuefeng Cao
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Xu Li
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Cheng Ma
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
| | - Peng George Wang
- Department of Chemistry and Center of Diagnostics & Therapeutics, Georgia State University, Atlanta, Georgia 30303, United States
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5
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Hossain MI, Hanashima S, Nomura T, Lethu S, Tsuchikawa H, Murata M, Kusaka H, Kita S, Maenaka K. Synthesis and Th1-immunostimulatory activity of α-galactosylceramide analogues bearing a halogen-containing or selenium-containing acyl chain. Bioorg Med Chem 2016; 24:3687-95. [PMID: 27325450 DOI: 10.1016/j.bmc.2016.06.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 06/03/2016] [Accepted: 06/03/2016] [Indexed: 12/13/2022]
Abstract
A novel series of CD1d ligand α-galactosylceramides (α-GalCers) were synthesized by incorporation of the heavy atoms Br and Se in the acyl chain backbone of α-galactosyl-N-cerotoylphytosphingosine. The synthetic analogues are potent CD1d ligands and stimulate mouse invariant natural killer T (iNKT) cells to selectively enhance Th1 cytokine production. These synthetic analogues would be efficient X-ray crystallographic probes to disclose precise atomic positions of alkyl carbons and lipid-protein interactions in KRN7000/CD1d complexes.
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Affiliation(s)
- Md Imran Hossain
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan; JST, ERATO, Lipid Active Structure Project, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Shinya Hanashima
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
| | - Takuto Nomura
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Sébastien Lethu
- JST, ERATO, Lipid Active Structure Project, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Hiroshi Tsuchikawa
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Michio Murata
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan; JST, ERATO, Lipid Active Structure Project, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
| | - Hiroki Kusaka
- Laboratory of Biomolecular Science, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Shunsuke Kita
- Laboratory of Biomolecular Science, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
| | - Katsumi Maenaka
- Laboratory of Biomolecular Science, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo 060-0812, Japan
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6
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Siciliano C, Barattucci A, Bonaccorsi P, Di Gioia ML, Leggio A, Minuti L, Romio E, Temperini A. Synthesis of d-erythro-Sphinganine through Serine-Derived α-Amino Epoxides. J Org Chem 2014; 79:5320-6. [DOI: 10.1021/jo500493c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Carlo Siciliano
- Dipartimento
di Farmacia e Scienze della Salute e della Nutrizione, Università della Calabria, Edificio Polifunzionale, I-87030 Arcavacata di Rende (CS), Italy
| | - Anna Barattucci
- Dipartimento
di Scienze Chimiche, Università di Messina, Viale F. Stagno d’Alcontres
31, 98166 Messina, Italy
| | - Paola Bonaccorsi
- Dipartimento
di Scienze Chimiche, Università di Messina, Viale F. Stagno d’Alcontres
31, 98166 Messina, Italy
| | - Maria Luisa Di Gioia
- Dipartimento
di Farmacia e Scienze della Salute e della Nutrizione, Università della Calabria, Edificio Polifunzionale, I-87030 Arcavacata di Rende (CS), Italy
| | - Antonella Leggio
- Dipartimento
di Farmacia e Scienze della Salute e della Nutrizione, Università della Calabria, Edificio Polifunzionale, I-87030 Arcavacata di Rende (CS), Italy
| | - Lucio Minuti
- Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Emanuela Romio
- Dipartimento
di Farmacia e Scienze della Salute e della Nutrizione, Università della Calabria, Edificio Polifunzionale, I-87030 Arcavacata di Rende (CS), Italy
| | - Andrea Temperini
- Dipartimento di Chimica e Tecnologia del Farmaco, Università di Perugia, Via del
Liceo 1, 06123 Perugia, Italy
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7
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Cheng JMH, Dangerfield EM, Timmer MSM, Stocker BL. A divergent approach to the synthesis of iGb3 sugar and lipid analogues via a lactosyl 2-azido-sphingosine intermediate. Org Biomol Chem 2014; 12:2729-36. [DOI: 10.1039/c4ob00241e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Isoglobotrihexosylceramide (iGb3, 1) is an immunomodulatory glycolipid that binds to CD1d and is presented to the T-cell receptor (TCR) of invariant natural killer T (iNKT) cells.
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Affiliation(s)
- Janice M. H. Cheng
- School of Chemical and Physical Sciences
- Victoria University of Wellington
- Wellington, New Zealand
- Malaghan Institute of Medical Research
- Wellington, New Zealand
| | - Emma M. Dangerfield
- School of Chemical and Physical Sciences
- Victoria University of Wellington
- Wellington, New Zealand
- Malaghan Institute of Medical Research
- Wellington, New Zealand
| | - Mattie S. M. Timmer
- School of Chemical and Physical Sciences
- Victoria University of Wellington
- Wellington, New Zealand
| | - Bridget L. Stocker
- School of Chemical and Physical Sciences
- Victoria University of Wellington
- Wellington, New Zealand
- Malaghan Institute of Medical Research
- Wellington, New Zealand
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8
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9
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Sanderson JP, Brennan PJ, Mansour S, Matulis G, Patel O, Lissin N, Godfrey DI, Kawahara K, Zähringer U, Rossjohn J, Brenner MB, Gadola SD. CD1d protein structure determines species-selective antigenicity of isoglobotrihexosylceramide (iGb3) to invariant NKT cells. Eur J Immunol 2013; 43:815-25. [PMID: 23280365 DOI: 10.1002/eji.201242952] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 12/02/2012] [Accepted: 12/17/2012] [Indexed: 11/07/2022]
Abstract
Isoglobotrihexosylceramide (iGb3) has been identified as a potent CD1d-presented self-antigen for mouse invariant natural killer T (iNKT) cells. The role of iGb3 in humans remains unresolved, however, as there have been conflicting reports about iGb3-dependent human iNKT-cell activation, and humans lack iGb3 synthase, a key enzyme for iGb3 synthesis. Given the importance of human immune responses, we conducted a human-mouse cross-species analysis of iNKT-cell activation by iGb3-CD1d. Here we show that human and mouse iNKT cells were both able to recognise iGb3 presented by mouse CD1d (mCD1d), but not human CD1d (hCD1d), as iGb3-hCD1d was unable to support cognate interactions with the iNKT-cell TCRs tested in this study. The structural basis for this discrepancy was identified as a single amino acid variation between hCD1d and mCD1d, a glycine-to-tryptophan modification within the α2-helix that prevents flattening of the iGb3 headgroup upon TCR ligation. Mutation of the human residue, Trp153, to the mouse ortholog, Gly155, therefore allowed iGb3-hCD1d to stimulate human iNKT cells. In conclusion, our data indicate that iGb3 is unlikely to be a major antigen in human iNKT-cell biology.
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Affiliation(s)
- Joseph P Sanderson
- Academic Unit of Clinical and Experimental Sciences, Faculty of Medicine, Sir Henry Wellcome and Hope Laboratories, Southampton Musculoskeletal BRU, University of Southampton, Southampton, United Kingdom
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10
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East JE, Kennedy AJ, Webb TJ. Raising the roof: the preferential pharmacological stimulation of Th1 and th2 responses mediated by NKT cells. Med Res Rev 2012; 34:45-76. [PMID: 23239102 DOI: 10.1002/med.21276] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Natural killer T (NKT) cells serve as a bridge between the innate and adaptive immune systems, and manipulating their effector functions can have therapeutic significances in the treatment of autoimmunity, transplant biology, infectious disease, and cancer. NKT cells are a subset of T cells that express cell-surface markers characteristic of both natural killer cells and T cells. These unique immunologic cells have been demonstrated to serve as a link between the innate and adaptive immune systems through their potent cytokine production following the recognition of a range of lipid antigens, mediated through presentation of the major histocompatibility complex (MHC) class I like CD1d molecule, in addition to the NKT cell's cytotoxic capabilities upon activation. Although a number of glycolipid antigens have been shown to complex with CD1d molecules, most notably the marine sponge derived glycolipid alpha-galactosylceramide (α-GalCer), there has been debate as to the identity of the endogenous activating lipid presented to the T-cell receptor (TCR) via the CD1d molecule on antigen-presenting cells (APCs). This review aims to survey the use of pharmacological agents and subsequent structure-activity relationships (SAR) that have given insight into the binding interaction of glycolipids with both the CD1d molecules as well as the TCR and the subsequent immunologic response of NKT cells. These studies not only elucidate basic binding interactions but also pave the way for future pharmacological modulation of NKT cell responses.
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Affiliation(s)
- James E East
- Department of Microbiology and Immunology, The Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, Maryland 21201
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11
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Dangerfield EM, Cheng JMH, Knight DA, Weinkove R, Dunbar PR, Hermans IF, Timmer MSM, Stocker BL. Species-specific activity of glycolipid ligands for invariant NKT cells. Chembiochem 2012; 13:1349-56. [PMID: 22639457 DOI: 10.1002/cbic.201200095] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Indexed: 11/07/2022]
Abstract
The immunomodulatory glycolipid α-galactosylceramide (α-GalCer) binds to CD1d and exhibits potent activity as a ligand for invariant CD1d-restricted natural killer-like T cells (iNKT cells). Structural analogues of α-GalCer have been synthesised to determine which components are required for CD1d presentation and iNKT cell activation, however, to date the importance of the phytosphingosine 4-hydroxyl for iNKT cell activation has been disputed. To clarify this, we synthesised two 4-deoxy α-GalCer analogues (sphinganine and sphingosine) and investigated their ability to activate murine and human iNKT cells. Analysis revealed that the analogues possessed comparable activity to α-GalCer in stimulating murine iNKT cells, but were severely compromised in their ability to stimulate human iNKT cells. Here we determined that species-specific glycolipid activity was due to a lack of recognition of the analogues by the T-cell receptors on human iNKT cells rather than insufficient presentation of the analogues on human CD1d molecules. From these results we suggest that glycolipids developed for potent iNKT cell activity in humans should contain a phytosphingosine base.
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Affiliation(s)
- Emma M Dangerfield
- Malaghan Institute of Medical Research, P. O. Box 7060, Wellington 6242, New Zealand
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12
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Pellicci DG, Clarke AJ, Patel O, Mallevaey T, Beddoe T, Le Nours J, Uldrich AP, McCluskey J, Besra GS, Porcelli SA, Gapin L, Godfrey DI, Rossjohn J. Recognition of β-linked self glycolipids mediated by natural killer T cell antigen receptors. Nat Immunol 2011; 12:827-33. [PMID: 21804559 DOI: 10.1038/ni.2076] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Accepted: 06/22/2011] [Indexed: 12/13/2022]
Abstract
The most potent foreign antigens for natural killer T cells (NKT cells) are α-linked glycolipids, whereas NKT cell self-reactivity involves weaker recognition of structurally distinct β-linked glycolipid antigens. Here we provide the mechanism for the autoreactivity of T cell antigen receptors (TCRs) on NKT cells to the mono- and tri-glycosylated β-linked agonists β-galactosylceramide (β-GalCer) and isoglobotrihexosylceramide (iGb3), respectively. In binding these disparate antigens, the NKT cell TCRs docked onto CD1d similarly, achieving this by flattening the conformation of the β-linked ligands regardless of the size of the glycosyl head group. Unexpectedly, the antigenicity of iGb3 was attributable to its terminal sugar group making compensatory interactions with CD1d. Thus, the NKT cell TCR molds the β-linked self ligands to resemble the conformation of foreign α-linked ligands, which shows that induced-fit molecular mimicry can underpin the self-reactivity of NKT cell TCRs to β-linked antigens.
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Affiliation(s)
- Daniel G Pellicci
- Department of Microbiology & Immunology, University of Melbourne, Parkville, Victoria, Australia
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13
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Zhou Z, Zhang C, Xia C, Chen W, Zhu H, Shang P, Ma F, Wang PG, Zhang J, Xu W, Tian Z. Enhanced Antitumor Effects by Chemical Modified IGb3 Analogues. Mol Cancer Ther 2011; 10:1375-84. [PMID: 21653685 DOI: 10.1158/1535-7163.mct-11-0030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
MESH Headings
- Animals
- Antigens, CD1d/chemistry
- Antigens, CD1d/metabolism
- Antineoplastic Agents/chemistry
- Antineoplastic Agents/pharmacology
- Binding Sites
- Dendritic Cells/drug effects
- Dendritic Cells/immunology
- Globosides/chemistry
- Globosides/pharmacology
- Killer Cells, Natural/drug effects
- Killer Cells, Natural/immunology
- Melanoma, Experimental/immunology
- Melanoma, Experimental/metabolism
- Melanoma, Experimental/pathology
- Mice
- Mice, Inbred C57BL
- Models, Molecular
- Neoplasm Metastasis
- Protein Binding
- Receptors, Antigen, T-Cell, alpha-beta/chemistry
- Receptors, Antigen, T-Cell, alpha-beta/metabolism
- STAT1 Transcription Factor/metabolism
- T-Box Domain Proteins/metabolism
- Trihexosylceramides/chemistry
- Trihexosylceramides/pharmacology
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Affiliation(s)
- Zhixia Zhou
- Institute of Immunopharmacology & Immunotherapy, School of Pharmaceutical Sciences, Shandong University, Jinan, China
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14
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Jervis PJ, Veerapen N, Bricard G, Cox LR, Porcelli SA, Besra GS. Synthesis and biological activity of alpha-glucosyl C24:0 and C20:2 ceramides. Bioorg Med Chem Lett 2010; 20:3475-8. [PMID: 20529677 PMCID: PMC4374101 DOI: 10.1016/j.bmcl.2010.05.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 05/04/2010] [Accepted: 05/05/2010] [Indexed: 11/26/2022]
Abstract
Alpha-glucosyl ceramides 4 and 5 have been synthesised and evaluated for their ability to stimulate the activation and expansion of human iNKT cells. The key challenge in the synthesis of both target molecules was the stereoselective synthesis of the alpha-glycosidic linkage. Of the methods examined, glycosylation using per-TMS-protected glucosyl iodide 16 was completely alpha-selective and provided gram quantities of amine 11, from which alpha-glucosyl ceramides 4 and 5 were obtained by N-acylation. alpha-GlcCer 4, containing a C24 saturated acyl chain, stimulated a marked proliferation and expansion of human circulating iNKT cells in short-term cultures. alpha-GlcCer 5, which contains a C20 11,14-cis-diene acyl chain (C20:2), induced extremely similar levels of iNKT cell activation and expansion.
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Affiliation(s)
- Peter J Jervis
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, UK
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15
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Liu Z, Byun HS, Bittman R. Asymmetric synthesis of D-ribo-phytosphingosine from 1-tetradecyne and (4-methoxyphenoxy)acetaldehyde. J Org Chem 2010; 75:4356-64. [PMID: 20527744 PMCID: PMC2892910 DOI: 10.1021/jo100707d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An asymmetric synthesis of d-ribo-phytosphingosine (1) was achieved by utilizing the ProPhenol (12)-catalyzed alkynylation of unsaturated aldehyde 8 to afford allylic propargylic alcohol (S)-6 followed by asymmetric epoxidation and opening of propargylic epoxy alcohol anti-5 with NaN(3)/NH(4)Cl. Deprotection and reduction of the resulting acyclic azide 3 then gave 1. Alkyne-azide 3 was subjected to an intramolecular click reaction, generating a bicyclic triazole, which was found to have unexpected vicinal coupling constants. Application of the advanced Mosher method verified the configurations of the three contiguous stereogenic centers of 1. An alkynyl azide analogue of 1, which may be useful as a glycosyl acceptor in the synthesis of alpha-galactosylceramide derivatives, was also readily prepared by this route.
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Affiliation(s)
- Zheng Liu
- Department of Chemistry and Biochemistry, Queens College of The City University of New York, Flushing, New York 11367-1597
| | - Hoe-Sup Byun
- Department of Chemistry and Biochemistry, Queens College of The City University of New York, Flushing, New York 11367-1597
| | - Robert Bittman
- Department of Chemistry and Biochemistry, Queens College of The City University of New York, Flushing, New York 11367-1597
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16
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Efficient synthesis of galactosylceramide analogues for iNKT cell stimulation. Bioorg Med Chem Lett 2010; 20:3859-62. [PMID: 20627566 DOI: 10.1016/j.bmcl.2010.05.045] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 05/07/2010] [Accepted: 05/12/2010] [Indexed: 11/24/2022]
Abstract
Glycolipids are potential antigens for iNKT cells recognition and demonstrate important roles in both innate and adaptive immunity. However, the difficulties in the preparation of pure configuration defined glycolipids limit the exploration of their different profiles in activating iNKT cells. We report here a concise and stereospecific preparation of novel galactosylceramide analogues by oxime ligation. This strategy would provide an efficient way to generate varied glycolipid analogues with either synthetic or natural carbohydrates for biological evaluations.
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Harrak Y, Llebaria A, Delgado A. A Practical Access to 1,2-Diaminophytosphingolipids. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800565] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Shang P, Zhang C, Xia C, Chen W, Han Q, Wang PG, Zhang J, Tian Z. Chemical modification of iGb3 increases IFN-gamma production by hepatic NKT cells. Int Immunopharmacol 2008; 8:645-53. [PMID: 18387506 DOI: 10.1016/j.intimp.2008.01.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2007] [Revised: 01/04/2008] [Accepted: 01/04/2008] [Indexed: 10/22/2022]
Abstract
Isoglobotrihexosylceramide (iGb3) has been identified as an endogenous ligand recognized by NKT cells; however, it is a weak agonist compared to the exogenous alpha-galactosylceramide. Modification of the structure of iGb3 might improve its stimulatory activity. In this study, we assessed the stimulating activity of chemically-modified iGb3 analogues on murine hepatic NKT cells. We analyzed the percentage of IFN-gamma- or IL-4-producing cells in hepatic iNKT cell population and found that two chemically-modified iGb3 analogues, especially 4'''-dh-iGb3, induced significantly greater intracellular IFN-gamma+ NKT cells in liver by flow cytometry. In vivo experiments also showed that 4-HO-iGb3 and 4'''-dh-iGb3 are selectively strong inducer for rapid serum IFN-gamma production compared with unmodified iGb3. Comparing the structure of iGb3 and its two iGb3 analogues, 4-HO-iGb3 has an extra hydroxy group on C4, suggesting that the additional hydroxy group of phytosphingosine might augment the stability of the CD1d/glycoceramide complex forming and thereby possibly promote IFN-gamma producing. By further modifying the polysaccharide of glycolipid as did in 4'''-dh-iGb3, we found that 4'''-dh-iGb3 elicited more Th1-biased responses than iGb3 and 4-HO-iGb3. This modification might more strongly strengthen the affinity of the TCR/glycoceramide complex and ultimately polarize iNKT cells to release more Th1 cytokines. Our data suggests that a combination modification on both polysaccharide and sphingosine chain of iGb3 elicits preferential Th1-biased responses.
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Affiliation(s)
- Pingping Shang
- Institute of Basic Medicine, Shandong Academy of Medical Sciences, Jinan 250062, China
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Stronge VS, Salio M, Jones EY, Cerundolo V. A closer look at CD1d molecules: new horizons in studying NKT cells. Trends Immunol 2007; 28:455-62. [PMID: 17825624 DOI: 10.1016/j.it.2007.08.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2007] [Revised: 07/06/2007] [Accepted: 08/29/2007] [Indexed: 11/27/2022]
Abstract
Recent findings have highlighted the ability of invariant natural killer T (iNKT) cells to recognize microbe-derived glycolipids and have demonstrated the role of these cells in several disease states, from autoimmune disease to cancer. It has also become clear that iNKT cells can rapidly mature dendritic cells and licence them to prime antigen-specific T- and B-cell responses. The use of CD1d tetramers to monitor iNKT cell frequency and phenotype has moved the field forward at a fast pace. To harness iNKT cells for therapeutic purposes and to understand their role in vivo, it is essential to characterize the molecular events that contribute to iNKT cell activation. Here we review new reagents and novel protocols that are facilitating a closer look at lipid presentation by CD1d molecules and their recognition by iNKT cells.
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MESH Headings
- Animals
- Antigen-Presenting Cells/immunology
- Antigen-Presenting Cells/metabolism
- Antigens, CD1/chemistry
- Antigens, CD1/immunology
- Antigens, CD1/metabolism
- Glycolipids/chemistry
- Glycolipids/immunology
- Glycolipids/metabolism
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Protein Folding
- Receptors, Antigen, T-Cell/chemistry
- Receptors, Antigen, T-Cell/immunology
- Receptors, Antigen, T-Cell/metabolism
- T-Lymphocyte Subsets/immunology
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Affiliation(s)
- Victoria S Stronge
- Cancer Research UK, Tumour Immunology Group, The Weatherall Institute of Molecular Medicine, Nuffield Department of Medicine, University of Oxford, Oxford OX3 9DS, UK
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