1
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Compton BJ, Farrand KJ, Tang CW, Osmond TL, Speir M, Authier-Hall A, Wang J, Ferguson PM, Chan STS, Anderson RJ, Cooney TR, Hayman CM, Williams GM, Brimble MA, Brooks CR, Yong LK, Metelitsa LS, Zajonc DM, Godfrey DI, Gasser O, Weinkove R, Painter GF, Hermans IF. Enhancing T cell responses and tumour immunity by vaccination with peptides conjugated to a weak NKT cell agonist. Org Biomol Chem 2019; 17:1225-1237. [PMID: 30656346 DOI: 10.1039/c8ob02982b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Activated NKT cells can stimulate antigen-presenting cells leading to enhanced peptide antigen-specific immunity. However, administration of potent NKT cell agonists like α-galactosylceramide (α-GalCer) can be associated with release of high levels of cytokines, and in some situations, hepatotoxicity. Here we show that it is possible to provoke sufficient NKT cell activity to stimulate strong antigen-specific T cell responses without these unwanted effects. This was achieved by chemically conjugating antigenic peptides to α-galactosylphytosphingosine (α-GalPhs), an NKT cell agonist with very weak activity based on structural characterisation and biological assays. Conjugation improved delivery to antigen-presenting cells in vivo, while use of a cathepsin-sensitive linker to release the α-GalPhs and peptide within the same cell promoted strong T cell activation and therapeutic anti-tumour responses in mice. The conjugates activated human NKT cells and enhanced human T cell responses to a viral peptide in vitro. Accordingly, we have demonstrated a means to safely exploit the immunostimulatory properties of NKT cells to enhance T cell activation for virus- and tumour-specific immunity.
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Affiliation(s)
- Benjamin J Compton
- The Ferrier Research Institute, Victoria University of Wellington, Lower Hutt, New Zealand.
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2
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Gasser O, Sharples KJ, Barrow C, Williams GM, Bauer E, Wood CE, Mester B, Dzhelali M, Caygill G, Jones J, Hayman CM, Hinder VA, Macapagal J, McCusker M, Weinkove R, Painter GF, Brimble MA, Findlay MP, Dunbar PR, Hermans IF. A phase I vaccination study with dendritic cells loaded with NY-ESO-1 and α-galactosylceramide: induction of polyfunctional T cells in high-risk melanoma patients. Cancer Immunol Immunother 2018; 67:285-298. [PMID: 29094183 PMCID: PMC11028320 DOI: 10.1007/s00262-017-2085-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Accepted: 10/23/2017] [Indexed: 12/22/2022]
Abstract
Vaccines that elicit targeted tumor antigen-specific T-cell responses have the potential to be used as adjuvant therapy in patients with high risk of relapse. However, the responses induced by vaccines in cancer patients have generally been disappointing. To improve vaccine function, we investigated the possibility of exploiting the immunostimulatory capacity of type 1 Natural killer T (NKT) cells, a cell type enriched in lymphoid tissues that can trigger improved antigen-presenting function in dendritic cells (DCs). In this phase I dose escalation study, we treated eight patients with high-risk surgically resected stage II-IV melanoma with intravenous autologous monocyte-derived DCs loaded with the NKT cell agonist α-GalCer and peptides derived from the cancer testis antigen NY-ESO-1. Two synthetic long peptides spanning defined immunogenic regions of the NY-ESO-1 sequence were used. This therapy proved to be safe and immunologically effective, inducing increases in circulating NY-ESO-1-specific T cells that could be detected directly ex vivo in seven out of eight patients. These responses were achieved using as few as 5 × 105 peptide-loaded cells per dose. Analysis after in vitro restimulation showed increases in polyfunctional CD4+ and CD8+ T cells that were capable of manufacturing two or more cytokines simultaneously. Evidence of NKT cell proliferation and/or NKT cell-associated cytokine secretion was seen in most patients. In light of these strong responses, the concept of including NKT cell agonists in vaccine design requires further investigation.
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Affiliation(s)
- Olivier Gasser
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, 6242, New Zealand
| | - Katrina J Sharples
- Dunedin School of Medicine, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
- Cancer Trials New Zealand, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Catherine Barrow
- Capital and Coast District Health Board, Private Bag 7902, Wellington, 6242, New Zealand
| | - Geoffrey M Williams
- Maurice Wilkins Centre for Molecular Biodiscovery, Private Bag 92019, Auckland, 1142, New Zealand
| | - Evelyn Bauer
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, 6242, New Zealand
| | - Catherine E Wood
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, 6242, New Zealand
- Capital and Coast District Health Board, Private Bag 7902, Wellington, 6242, New Zealand
| | - Brigitta Mester
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, 6242, New Zealand
| | - Marina Dzhelali
- Capital and Coast District Health Board, Private Bag 7902, Wellington, 6242, New Zealand
| | | | - Jeremy Jones
- GlycoSyn, PO Box 31 310, Lower Hutt, 5040, New Zealand
| | - Colin M Hayman
- The Ferrier Research Institute, Victoria University of Wellington, PO Box 33436, Lower Hutt, 5046, New Zealand
| | - Victoria A Hinder
- Cancer Trials New Zealand, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Jerome Macapagal
- Cancer Trials New Zealand, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Monica McCusker
- Cancer Trials New Zealand, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Robert Weinkove
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, 6242, New Zealand
- Capital and Coast District Health Board, Private Bag 7902, Wellington, 6242, New Zealand
| | - Gavin F Painter
- The Ferrier Research Institute, Victoria University of Wellington, PO Box 33436, Lower Hutt, 5046, New Zealand
| | - Margaret A Brimble
- Maurice Wilkins Centre for Molecular Biodiscovery, Private Bag 92019, Auckland, 1142, New Zealand
| | - Michael P Findlay
- Cancer Trials New Zealand, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - P Rod Dunbar
- Maurice Wilkins Centre for Molecular Biodiscovery, Private Bag 92019, Auckland, 1142, New Zealand
- School of Biological Sciences, University of Auckland, PO Box 92019, Auckland, New Zealand
| | - Ian F Hermans
- Malaghan Institute of Medical Research, PO Box 7060, Wellington, 6242, New Zealand.
- Maurice Wilkins Centre for Molecular Biodiscovery, Private Bag 92019, Auckland, 1142, New Zealand.
- School of Biological Sciences, Victoria University of Wellington, PO Box 600, Wellington, 6140, New Zealand.
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3
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Anderson RJ, Li J, Kedzierski L, Compton BJ, Hayman CM, Osmond TL, Tang CW, Farrand KJ, Koay HF, Almeida CFDSSE, Holz LR, Williams GM, Brimble MA, Wang Z, Koutsakos M, Kedzierska K, Godfrey DI, Hermans IF, Turner SJ, Painter GF. Augmenting Influenza-Specific T Cell Memory Generation with a Natural Killer T Cell-Dependent Glycolipid-Peptide Vaccine. ACS Chem Biol 2017; 12:2898-2905. [PMID: 29043774 DOI: 10.1021/acschembio.7b00845] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of a universal vaccine for influenza A virus (IAV) that does not require seasonal modification is a long-standing health goal, particularly in the context of the increasing threat of new global pandemics. Vaccines that specifically induce T cell responses are of considerable interest because they can target viral proteins that are more likely to be shared between different virus strains and subtypes and hence provide effective cross-reactive IAV immunity. From a practical perspective, such vaccines should induce T cell responses with long-lasting memory, while also being simple to manufacture and cost-effective. Here we describe the synthesis and evaluation of a vaccine platform based on solid phase peptide synthesis and bio-orthogonal conjugation methodologies. The chemical approach involves covalently attaching synthetic long peptides from a virus-associated protein to a powerful adjuvant molecule, α-galactosylceramide (α-GalCer). Strain-promoted azide-alkyne cycloaddition is used as a simple and efficient method for conjugation, and pseudoproline methodology is used to increase the efficiency of the peptide synthesis. α-GalCer is a glycolipid that stimulates NKT cells, a population of lymphoid-resident immune cells that can provide potent stimulatory signals to antigen-presenting cells engaged in driving proliferation and differentiation of peptide-specific T cells. When used in mice, the vaccine induced T cell responses that provided effective prophylactic protection against IAV infection, with the speed of viral clearance greater than that seen from previous viral exposure. These findings are significant because the vaccines are highly defined, quick to synthesize, and easily characterized and are therefore appropriate for large scale affordable manufacture.
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Affiliation(s)
- Regan J. Anderson
- The
Ferrier Research Institute, Victoria University of Wellington, PO Box 33436, Lower
Hutt 5046, New Zealand
| | - Jasmine Li
- Department
of Microbiology, Biomedical Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Lukasz Kedzierski
- Department
of Microbiology, Biomedical Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Benjamin J. Compton
- The
Ferrier Research Institute, Victoria University of Wellington, PO Box 33436, Lower
Hutt 5046, New Zealand
| | - Colin M. Hayman
- The
Ferrier Research Institute, Victoria University of Wellington, PO Box 33436, Lower
Hutt 5046, New Zealand
| | - Taryn L. Osmond
- Malaghan Institute of Medical Research, PO Box
7060, Wellington 6242, New Zealand
| | - Ching-wen Tang
- Malaghan Institute of Medical Research, PO Box
7060, Wellington 6242, New Zealand
| | - Kathryn J. Farrand
- Malaghan Institute of Medical Research, PO Box
7060, Wellington 6242, New Zealand
| | - Hui-Fern Koay
- Department
of Microbiology and Immunology, at the Doherty Institute for Infection
and Immunity, The University of Melbourne, 792 Elizabeth St, Melbourne, Victoria 3010, Australia
- Australian
Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Catarina Filipa Dos Santos Sa E. Almeida
- Department
of Microbiology and Immunology, at the Doherty Institute for Infection
and Immunity, The University of Melbourne, 792 Elizabeth St, Melbourne, Victoria 3010, Australia
- Australian
Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Lauren R. Holz
- Department
of Microbiology and Immunology, at the Doherty Institute for Infection
and Immunity, The University of Melbourne, 792 Elizabeth St, Melbourne, Victoria 3010, Australia
| | - Geoffrey M. Williams
- School
of Biological Sciences, The University of Auckland, 3 Symonds St, Auckland Central 1142, New Zealand
| | - Margaret A Brimble
- School
of Biological Sciences, The University of Auckland, 3 Symonds St, Auckland Central 1142, New Zealand
- Maurice
Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3 Symonds St, Auckland Central 1142, New Zealand
| | - Zhongfang Wang
- Department
of Microbiology and Immunology, at the Doherty Institute for Infection
and Immunity, The University of Melbourne, 792 Elizabeth St, Melbourne, Victoria 3010, Australia
| | - Marios Koutsakos
- Department
of Microbiology and Immunology, at the Doherty Institute for Infection
and Immunity, The University of Melbourne, 792 Elizabeth St, Melbourne, Victoria 3010, Australia
| | - Katherine Kedzierska
- Department
of Microbiology and Immunology, at the Doherty Institute for Infection
and Immunity, The University of Melbourne, 792 Elizabeth St, Melbourne, Victoria 3010, Australia
| | - Dale I. Godfrey
- Department
of Microbiology and Immunology, at the Doherty Institute for Infection
and Immunity, The University of Melbourne, 792 Elizabeth St, Melbourne, Victoria 3010, Australia
- Australian
Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Ian F. Hermans
- Malaghan Institute of Medical Research, PO Box
7060, Wellington 6242, New Zealand
- Maurice
Wilkins Centre for Molecular Biodiscovery, The University of Auckland, 3 Symonds St, Auckland Central 1142, New Zealand
- Avalia Immunotherapies Limited, Gracefield Innovation
Quarter, 69 Gracefield Rd, Lower Hutt 5010, New Zealand
| | - Stephen J. Turner
- Department
of Microbiology, Biomedical Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Gavin F. Painter
- The
Ferrier Research Institute, Victoria University of Wellington, PO Box 33436, Lower
Hutt 5046, New Zealand
- Avalia Immunotherapies Limited, Gracefield Innovation
Quarter, 69 Gracefield Rd, Lower Hutt 5010, New Zealand
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4
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Compton BJ, Tang CW, Johnston KA, Osmond TL, Hayman CM, Larsen DS, Hermans IF, Painter GF. Synthesis and Activity of 6″-Deoxy-6″-thio-α-GalCer and Peptide Conjugates. Org Lett 2015; 17:5954-7. [PMID: 26606283 DOI: 10.1021/acs.orglett.5b02836] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A major challenge in the development of highly defined synthetic vaccines is the codelivery of vaccine components (i.e., antigen and adjuvant) to secondary lymphoid tissue to induce optimal immune responses. This problem can be addressed by synthesizing vaccines that comprise peptide antigens covalently attached to glycolipid adjuvants through biologically cleavable linkers. Toward this, a strategy utilizing previously unreported 6″-deoxy-6″-thio analogues of α-GalCer that can undergo chemoselective conjugation with peptide antigens is described. Administration of these conjugate vaccines leads to enhanced priming of antigen specific T cells. This simple vaccine design is broadly applicable to multiple disease indications such as cancer and infectious disease.
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Affiliation(s)
- Benjamin J Compton
- The Ferrier Research Institute, Victoria University of Wellington , P.O. Box 600, Wellington 6140, New Zealand
| | - Ching-wen Tang
- Malaghan Institute of Medical Research , P.O. Box 7060, Wellington 6242, New Zealand
| | - Karen A Johnston
- The Ferrier Research Institute, Victoria University of Wellington , P.O. Box 600, Wellington 6140, New Zealand
| | - Taryn L Osmond
- Malaghan Institute of Medical Research , P.O. Box 7060, Wellington 6242, New Zealand
| | - Colin M Hayman
- The Ferrier Research Institute, Victoria University of Wellington , P.O. Box 600, Wellington 6140, New Zealand
| | - David S Larsen
- Department of Chemistry, University of Otago , P.O. Box 56, Dunedin 9054, New Zealand
| | - Ian F Hermans
- Malaghan Institute of Medical Research , P.O. Box 7060, Wellington 6242, New Zealand.,School of Biological Sciences, Victoria University of Wellington , P.O. Box 600, Wellington 6140, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery , 3 Symonds Street, Auckland Central 1142, New Zealand
| | - Gavin F Painter
- The Ferrier Research Institute, Victoria University of Wellington , P.O. Box 600, Wellington 6140, New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery , 3 Symonds Street, Auckland Central 1142, New Zealand
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5
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Anderson RJ, Compton BJ, Tang CW, Authier-Hall A, Hayman CM, Swinerd GW, Kowalczyk R, Harris P, Brimble MA, Larsen DS, Gasser O, Weinkove R, Hermans IF, Painter GF. NKT cell-dependent glycolipid-peptide vaccines with potent anti-tumour activity. Chem Sci 2015; 6:5120-5127. [PMID: 28717498 PMCID: PMC5500832 DOI: 10.1039/c4sc03599b] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 06/25/2015] [Indexed: 12/22/2022] Open
Abstract
Glycolipid–peptide conjugates designed to release vaccine components within target cells ensuring potent CD1d dependent T cell responses.
It is known that T cells can eliminate tumour cells through recognition of unique or aberrantly expressed antigens presented as peptide epitopes by major histocompatibility complex (MHC) molecules on the tumour cell surface. With recent advances in defining tumour-associated antigens, it should now be possible to devise therapeutic vaccines that expand specific populations of anti-tumour T cells. However there remains a need to develop simpler efficacious synthetic vaccines that possess clinical utility. We present here the synthesis and analysis of vaccines based on conjugation of MHC-binding peptide epitopes to α-galactosylceramide, a glycolipid presented by the nonpolymorphic antigen-presenting molecule CD1d to provoke the stimulatory activity of type I natural killer T (NKT) cells. The chemical design incorporates an enzymatically cleavable linker that effects controlled release of the active components in vivo. Chemical and biological analysis of different linkages with different enzymatic targets enabled selection of a synthetic vaccine construct with potent therapeutic anti-tumour activity in mice, and marked in vitro activity in human blood.
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Affiliation(s)
- Regan J Anderson
- The Ferrier Research Institute , Victoria University of Wellington , PO Box 33436 , Lower Hutt 5046 , New Zealand .
| | - Benjamin J Compton
- The Ferrier Research Institute , Victoria University of Wellington , PO Box 33436 , Lower Hutt 5046 , New Zealand .
| | - Ching-Wen Tang
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand .
| | - Astrid Authier-Hall
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand .
| | - Colin M Hayman
- The Ferrier Research Institute , Victoria University of Wellington , PO Box 33436 , Lower Hutt 5046 , New Zealand .
| | - Gene W Swinerd
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand . .,School of Biological Sciences , Victoria University of Wellington , PO Box 600 , Wellington 6140 , New Zealand
| | - Renata Kowalczyk
- School of Biological Sciences , The University of Auckland , 3 Symonds St , Auckland Central , 1142 , New Zealand
| | - Paul Harris
- School of Biological Sciences , The University of Auckland , 3 Symonds St , Auckland Central , 1142 , New Zealand
| | - Margaret A Brimble
- School of Biological Sciences , The University of Auckland , 3 Symonds St , Auckland Central , 1142 , New Zealand.,Maurice Wilkins Centre for Molecular Biodiscovery , The University of Auckland , 3 Symonds St , Auckland Central , 1142 , New Zealand
| | - David S Larsen
- Department of Chemistry , University of Otago , PO Box 56 , Dunedin 9054 , New Zealand
| | - Olivier Gasser
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand .
| | - Robert Weinkove
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand . .,Department of Pathology & Molecular Medicine , University of Otago Wellington , New Zealand
| | - Ian F Hermans
- Malaghan Institute of Medical Research , PO Box 7060 , Wellington 6242 , New Zealand . .,Maurice Wilkins Centre for Molecular Biodiscovery , The University of Auckland , 3 Symonds St , Auckland Central , 1142 , New Zealand.,School of Biological Sciences , Victoria University of Wellington , PO Box 600 , Wellington 6140 , New Zealand
| | - Gavin F Painter
- The Ferrier Research Institute , Victoria University of Wellington , PO Box 33436 , Lower Hutt 5046 , New Zealand .
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6
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Anderson RJ, Tang CW, Daniels NJ, Compton BJ, Hayman CM, Johnston KA, Knight DA, Gasser O, Poyntz HC, Ferguson PM, Larsen DS, Ronchese F, Painter GF, Hermans IF. A self-adjuvanting vaccine induces cytotoxic T lymphocytes that suppress allergy. Nat Chem Biol 2014; 10:943-9. [DOI: 10.1038/nchembio.1640] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 08/04/2014] [Indexed: 01/12/2023]
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7
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Hubert M, Larsen DS, Hayman CM, Rades T, Hook S. Physical Characterization of Synthetic Phosphatidylinositol Dimannosides and Analogues in Binary Systems with Phosphatidylcholine. Mol Pharm 2014; 11:913-21. [DOI: 10.1021/mp400588y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Colin M. Hayman
- Carbohydrate
Chemistry Team, Callaghan Innovation, P.O. Box 31-310, Lower Hutt, New Zealand
| | - Thomas Rades
- Department
of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
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8
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Hubert M, Compton BJ, Hayman CM, Larsen DS, Painter GF, Rades T, Hook S. Physicochemical and biological characterization of synthetic phosphatidylinositol dimannosides and analogues. Mol Pharm 2013; 10:1928-39. [PMID: 23469864 DOI: 10.1021/mp300707a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Native phosphatidylinositol mannosides (PIMs), isolated from the cell wall of Mycobacterium bovis, and synthetic PIM analogues have been reported to offer a variety of immunomodulating properties, including both suppressive and stimulatory activity. While numerous studies have examined the biological activity of these molecules, the aim of this research was to assess the physicochemical properties at a molecular level and correlate these characteristics with biological activity in a mouse model of airway eosinophilia. To accomplish this, we varied the flexibility and lipophilicity of synthetic PIMs by changing the polar headgroup (inositol- vs glycerol-based core) and the length of the acyl chains of the fatty acid residues (C0, C10, C16, and C18). A series of six phosphatidylinositol dimannosides (PIM2s) and phosphatidylglycerol dimannosides (PGM2s) were synthesized and characterized in this study. Langmuir monolayer studies showed that surface pressure-area (π-A) isotherms were greatly influenced by the length of the lipid acyl chains as well as the steric hindrance and volume of the headgroups. In aqueous solution, lipidated PIM2 and PGM2 compounds were observed to self-assemble into circular aggregates, as confirmed by dynamic light scattering and transmission electron microscopic investigations. Removal of the inositol ring but retention of the three-carbon glycerol unit maintained biological activity. We found that the deacylated PGM2, which did not show self-organization, had no effect on the eosinophil numbers but did have an impact on the expansion of OVA-specific CD4(+) Vα2Vβ5 T cells.
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Affiliation(s)
- Madlen Hubert
- School of Pharmacy, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
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9
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Rankin GM, Compton BJ, Johnston KA, Hayman CM, Painter GF, Larsen DS. Synthesis and Mass Spectral Characterization of Mycobacterial Phosphatidylinositol and Its Dimannosides. J Org Chem 2012; 77:6743-59. [DOI: 10.1021/jo301189y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Benjamin J. Compton
- Carbohydrate Chemistry Team, Industrial Research Limited, P.O. Box 31310, Lower
Hutt, New Zealand
| | - Karen A. Johnston
- Carbohydrate Chemistry Team, Industrial Research Limited, P.O. Box 31310, Lower
Hutt, New Zealand
| | - Colin M. Hayman
- Carbohydrate Chemistry Team, Industrial Research Limited, P.O. Box 31310, Lower
Hutt, New Zealand
| | - Gavin F. Painter
- Carbohydrate Chemistry Team, Industrial Research Limited, P.O. Box 31310, Lower
Hutt, New Zealand
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10
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Parlane NA, Compton BJ, Hayman CM, Painter GF, Basaraba RJ, Heiser A, Buddle BM. Phosphatidylinositol di-mannoside and derivates modulate the immune response to and efficacy of a tuberculosis protein vaccine against Mycobacterium bovis infection. Vaccine 2011; 30:580-8. [PMID: 22120192 DOI: 10.1016/j.vaccine.2011.11.055] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2011] [Revised: 11/07/2011] [Accepted: 11/15/2011] [Indexed: 12/31/2022]
Abstract
Mycobacterium bovis infects a wide range of hosts, including domestic livestock, wildlife, and humans. Development of an effective vaccine protecting against bovine tuberculosis would provide a cost-effective tuberculosis control strategy. The objective of this study was to investigate the ability of phosphatidylinositol di-mannoside (PIM(2)) and its derivatives to modulate cell-mediated immunity in vivo in a bovine tuberculosis mouse model in response to a relevant antigen, namely a fusion protein of mycobacterial proteins Ag85A and ESAT-6. The addition of synthetic PIM(2) to the vaccine resulted in a significant reduction in lung bacterial counts and a cytokine profile indicating a Th 1 type immune response. The addition of the other PIM(2) derivatives to the vaccine or the fusion protein alone did not result in reduced lung bacterial counts; moreover, the addition of PIM(2)ME appeared to negate the induction of an antigen-specific interferon-γ response and protection against tuberculosis. In conclusion, this study provides further evidence that PIMs can function as potent adjuvants for protein or sub-unit vaccines, but subtle structural differences among PIMs can markedly alter the type of immune response induced.
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Affiliation(s)
- Natalie A Parlane
- AgResearch, Hopkirk Research Institute, Grasslands Research Centre, Tennent Drive, Private Bag 11008, Palmerston North 4442, New Zealand
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11
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Ainge GD, Martin WJ, Compton BJ, Hayman CM, Larsen DS, Yoon SI, Wilson IA, Harper JL, Painter GF. Synthesis and Toll-like receptor 4 (TLR4) activity of phosphatidylinositol dimannoside analogues. J Med Chem 2011; 54:7268-79. [PMID: 21936536 DOI: 10.1021/jm2008419] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A series of five PIM(2) analogues were synthesized and tested for their ability to activate primary macrophages and modulate LPS signaling. Structural changes included replacement of the fatty acid esters of the phosphatidyl moiety of PIM(2) with the corresponding ether or amide. An AcPIM(2) analogue possessing an ether linkage was also prepared. The synthetic methodology utilized an orthogonally protected chiral myo-inositol starting material that was conveniently prepared from myo-inositol in just two steps. Important steps in the synthetic protocols included the regio- and α-selective glycosylation of inositol O-6 and introduction of the phosphodiester utilizing phosphoramidite chemistry. Replacement of the inositol core with a glycerol moiety gave compounds described as phosphatidylglycerol dimannosides (PGM(2)). Biological testing of these PIM compounds indicated that the agonist activity was TLR4 dependent. An ether linkage increased agonist activity. Removal of the inositol ring enhanced antagonist activity, and the presence of an additional lipid chain enhanced LPS-induced cytokine production in primary macrophages. Furthermore, the interruption of the LPS-induced 2:2 TLR4/MD-2 signaling complex formation by PIM(2) represents a previously unidentified mechanism involved in the bioactivity of PIM molecules.
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Affiliation(s)
- Gary D Ainge
- Carbohydrate Chemistry Team, Industrial Research Limited, P.O. Box 31-310, Lower Hutt, New Zealand
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12
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Ainge GD, Compton BJ, Hayman CM, Martin WJ, Toms SM, Larsen DS, Harper JL, Painter GF. Chemical synthesis and immunosuppressive activity of dipalmitoyl phosphatidylinositol hexamannoside. J Org Chem 2011; 76:4941-51. [PMID: 21574597 DOI: 10.1021/jo200588u] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Phosphatidylinositol mannosides (PIMs) isolated from mycobacteria have been identified as an important class of phosphoglycolipids with significant immune-modulating properties. We present here the synthesis of dipalmitoyl phosphatidylinositol hexamannoside (PIM(6)) 1 and the first reported functional biology of a synthetic PIM(6). Key steps in the synthetic protocol included the selective glycosylation of an inositol 2,6-diol with a suitably protected mannosyl donor and construction of the glycan core utilizing a [3 + 4] thio-glycosylation strategy. The target 1 was purified by reverse phase chromatography and characterized by standard spectroscopic methods, HPLC, and chemical modification by deacylation to dPIM(6). The (1)H NMR spectrum of synthetic dPIM(6) obtained from 1 matched that of dPIM(6) obtained from nature. PIM(6) (1) exhibited dendritic cell-dependent suppression of CD8(+) T cell expansion in a human mixed lymphocyte reaction consistent with the well established immunosuppressive activity of whole mycobacteria.
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Affiliation(s)
- Gary D Ainge
- Carbohydrate Chemistry Team, Industrial Research Limited, PO Box 31-310, Lower Hutt, New Zealand
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13
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Girvan RC, Knight DA, O’loughlin CJ, Hayman CM, Hermans IF, Webster GA. MIS416, a non-toxic microparticle adjuvant derived from Propionibacterium acnes comprising immunostimulatory muramyl dipeptide and bacterial DNA promotes cross-priming and Th1 immunity. Vaccine 2011; 29:545-57. [DOI: 10.1016/j.vaccine.2010.10.040] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Accepted: 10/14/2010] [Indexed: 10/18/2022]
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14
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Harper JL, Hayman CM, Larsen DS, Painter GF, Singh-Gill G. A PIM₂ analogue suppresses allergic airway disease. Bioorg Med Chem 2010; 19:917-25. [PMID: 21215641 DOI: 10.1016/j.bmc.2010.11.058] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2010] [Revised: 11/23/2010] [Accepted: 11/25/2010] [Indexed: 01/20/2023]
Abstract
Two approaches for the synthesis of a phosphatidylinositol dimannoside (PIM₂) analogue 4 that mimics the suppressive activity of natural PIMs and also synthetic PIM₂ have been developed. This analogue, where the inositol core was replaced by glycerol, was tested for its ability to suppress cellular inflammation in a mouse model of allergic asthma and shown to be effective in suppressing airway eosinophilia. Suppression of all inflammatory cells monitored was observed, indicating a general blockade of cellular activity. These data indicate that the inositol core is not essential for this suppressive activity.
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Affiliation(s)
- Jacquie L Harper
- The Malaghan Institute of Medical Research, Wellington, New Zealand
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15
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Daines AM, Greatrex BW, Hayman CM, Hook SM, McBurney WT, Rades T, Rendle PM, Sims IM. Mannosylated saponins based on oleanolic and glycyrrhizic acids. Towards synthetic colloidal antigen delivery systems. Bioorg Med Chem 2009; 17:5207-18. [DOI: 10.1016/j.bmc.2009.05.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 05/13/2009] [Accepted: 05/17/2009] [Indexed: 11/17/2022]
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16
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Bulman Page PC, Buckley BR, Elsegood MR, Hayman CM, Heaney H, Rassias GA, Talib SA, Liddle J. Synthesis of enantiomerically pure tertiary 1,2-aminoalcohols by the highly diastereoselective reductive ring opening of oxazolidines. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.08.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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17
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Ainge GD, Parlane NA, Denis M, Dyer BS, Härer A, Hayman CM, Larsen DS, Painter GF. Phosphatidylinositol Mannoside Ether Analogues: Syntheses and Interleukin-12-Inducing Properties. J Org Chem 2007; 72:5291-6. [PMID: 17559276 DOI: 10.1021/jo070639m] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Phosphatidylinositol mannosides (PIMs) isolated from mycobacteria have been identified as an important class of glycolipids with significant immune modulating properties. We present here the syntheses of phosphatidylinositol dimannoside ether analogues 2 and 3 and evaluate their interleukin-12 (IL-12)-inducing properties along with dipalmitoyl PIM2 (1) in an in vitro bovine dendritic cell assay. Both synthetic PIM analogues and synthetic dipalmitoyl PIM2 (1) were effective at enhancing IL-12 production by immature bovine dendritic cells. Unexpectedly, ether analogue 2 was significantly more active than dipalmitoyl PIM2 (1) which indicates that modified PIM compounds can be strongly immunoactive and may have significant adjuvant activities.
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Affiliation(s)
- Gary D Ainge
- Carbohydrate Chemistry Team, Industrial Research Limited, P.O. Box 31-310, Lower Hutt, New Zealand
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18
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Ainge GD, Parlane NA, Denis M, Hayman CM, Larsen DS, Painter GF. Phosphatidylinositol mannosides: Synthesis and adjuvant properties of phosphatidylinositol di- and tetramannosides. Bioorg Med Chem 2006; 14:7615-24. [PMID: 16876422 DOI: 10.1016/j.bmc.2006.07.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2006] [Revised: 06/26/2006] [Accepted: 07/01/2006] [Indexed: 10/24/2022]
Abstract
Phosphatidylinositol mannosides (PIMs) isolated from mycobacteria have been identified as an important class of glycolipids with significant immune modulating properties. We present here the syntheses of phosphatidylinositol dimannoside (PIM2, 1) and phosphatidylinositol tetramannoside (PIM4, 2) and evaluate their adjuvant properties in a transgenic mouse model. The key step in the synthetic methodology for the synthesis of 2 relies on the selective glycosylation of diol 3 with mannosyl donor 11. Both synthetic PIMs were effective at enhancing IFN-gamma when given as adjuvants with a model antigen, with PIM2 being the more active. These data suggest that in this assay the PIM core structure is responsible for the observed biological activity.
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Affiliation(s)
- Gary D Ainge
- Carbohydrate Chemistry Team, Industrial Research Limited, Lower Hutt, New Zealand
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19
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Lee A, Farrand KJ, Dickgreber N, Hayman CM, Jürs S, Hermans IF, Painter GF. Novel synthesis of alpha-galactosyl-ceramides and confirmation of their powerful NKT cell agonist activity. Carbohydr Res 2006; 341:2785-98. [PMID: 17014832 DOI: 10.1016/j.carres.2006.09.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2006] [Revised: 09/05/2006] [Accepted: 09/07/2006] [Indexed: 11/21/2022]
Abstract
alpha-Galactosyl-ceramide (1) has been identified as a powerful modulator of immunological processes through its capacity to bind CD1d molecules and specifically activate invariant natural killer (NK)-like T cells (iNKT cells). This paper describes the synthesis of 1, the analogous alpha-galactosyl-ceramide 3, and its short chain analogue 'OCH' (2), by use of the 4,6-di-O-tert-butylsilylene (DTBS) protecting group to produce a powerful alpha-galactosylating agent. In vivo experiments confirmed these compounds to be potent and selective activators of iNKT cells in a CD1d-dependent manner, each inducing a unique profile of cytokine release. This synthesis strategy will permit the generation of novel derivatives for use in the study of the mechanism of iNKT cell activation.
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Affiliation(s)
- Adrianne Lee
- Carbohydrate Chemistry, Industrial Research Limited, PO Box 31-310, Lower Hutt, New Zealand
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20
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Hayman CM, Larsen DS, Simpson J, Bailey KB, Gill GS. A stereoselective synthesis of 6,6,6-trifluoro-l-daunosamine and 6,6,6-trifluoro-l-acosamine. Org Biomol Chem 2006; 4:2794-800. [PMID: 16826305 DOI: 10.1039/b606055b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A short synthesis of 6,6,6-trifluoro-L-acosamine 15 and 6,6,6-trifluoro-L-daunosamine 19 has been accomplished. The pyranose ring system of these carbohydrate analogues was formed by a hetero-Diels-Alder reaction of vinylogous imide 11 and ethyl vinyl ether which gave adduct 12a in 40% yield. Hydroboration gave 13 and subsequent hydrogenolytic removal of the (R)-2-phenylethyl chiral auxiliary gave ethyl 6,6,6-trifluoro-L-acosaminide 14. Acid hydrolysis furnished target 15. Glycoside 13 was N-trifluoroacetylated to give 16, the structure was confirmed by single crystal X-ray diffraction. The C-4 stereochemistry of 16 was inverted by Swern oxidation of the 4-OH group, and subsequent borohydride reduction to give 17. Hydrogenolytic removal of the auxiliary gave ethyl-6,6,6-trifluoro-L-daunosaminide 18. Acid hydrolysis provided 19.
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Affiliation(s)
- Colin M Hayman
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand
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21
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Shul G, McKenzie KJ, Niedziolka J, Rozniecka E, Palys B, Marken F, Hayman CM, Buckley BR, Bulman Page PC, Opallo M. Characterisation of biphasic electrodes based on the liquid N,N-didodecyl-N′N′-diethylphenylenediamine redox system immobilised on porous hydrophobic silicates and immersed in aqueous media. J Electroanal Chem (Lausanne) 2005. [DOI: 10.1016/j.jelechem.2004.12.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Opallo M, Saczek-Maj M, Shul G, Hayman CM, Page PCB, Marken F. Microphase voltammetry of diluted and undiluted redox liquids deposited on sol–gel ceramic carbon electrodes. Electrochim Acta 2005. [DOI: 10.1016/j.electacta.2004.10.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Stott SJ, McKenzie KJ, Mortimer RJ, Hayman CM, Buckley BR, Bulman Page PC, Marken F, Shul G, Opallo M. Liquid | Liquid Ion-Transfer Processes at the Dioctylphosphoric Acid (N,N-didodecyl-N‘,N‘-diethylphenylenediamine) | Water (Electrolyte) Interface at Graphite and Mesoporous TiO2 Substrates. Anal Chem 2004; 76:5364-9. [PMID: 15362893 DOI: 10.1021/ac049317y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Biphasic electrode systems are studied for the case of the oxidation of the water-insoluble liquid N,N-didodecyl-N',N'-diethylphenylenediamine (DDPD) neat and dissolved in bis(2-ethylhexyl) phosphate (HDOP) and immersed in aqueous electrolyte media. The oxidation process in the absence of HDOP is accompanied by transfer of the anion (perchlorate or phosphate) from the water into the organic phase. However, in the presence of HDOP, oxidation is accompanied by proton exchange instead. This electrochemically driven proton exchange process occurs over a wide pH range. Organic microdroplet deposits of DDPD in HDOP at basal plane pyrolytic graphite electrodes are studied by voltammetric techniques and compared in their behavior to organic microphase deposits in mesoporous TiO2 thin films. The mesoporous TiO2 thin film acts as a host for the organic liquid and provides an alternative biphasic electrode system compared to the random microdroplet/graphite system. Two types of mesoporous TiO2 thin-film electrodes, (i) a 300-400-nm film on ITO and (ii) a 300-400-nm film on ITO sputter-coated with a 20-nm porous gold layer, are investigated.
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Affiliation(s)
- Susan J Stott
- Department of Chemistry, Loughborough University, Loughborough, Leicestershire, UK
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24
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Abstract
Several trifluoromethanesulfonates of general structure ArCOCH2OTf were prepared and their suitability for use as derivatizing agents for the HPLC analysis of betaines was assessed. Four of them (Ar = 2′-naphthyl, 2′-fluorenyl, 6′-methoxynaphthacyl, and 2′-phenanthrenacyl) showed promise for use with UV and/or fluorescence detectors, with the last potentially the most promising.
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25
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Heaney H, Boxhall JY, Page PC, Chan Y, Hayman CM, McGrath MJ. The Desymmetrisation of Resorcinol:The Synthesis of Resorcinol Monoalkyl Ethers. Synlett 2003. [DOI: 10.1055/s-2003-39293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Page PC, Leach DC, Hayman CM, Hamzah AS, Allin SM, McKee V. A Short Preparation of an AdvancedIntermediate for Lactacystin Synthesis: The Complete Carbon Skeletonof Clasto-Lactacystin Dihydroxyacid. Synlett 2003. [DOI: 10.1055/s-2003-39290] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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27
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Schröder U, Wadhawan J, Evans RG, Compton RG, Wood B, Walton DJ, France RR, Marken F, Bulman Page PC, Hayman CM. Probing Thermodynamic Aspects of Electrochemically Driven Ion-Transfer Processes Across Liquid|Liquid Interfaces: Pure versus Diluted Redox Liquids. J Phys Chem B 2002. [DOI: 10.1021/jp0146059] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Uwe Schröder
- Institut für Chemie und Biochemie, Ernst-Moritz-Arndt Universität, Soldmannstrasse 16, 17489 Greifswald, Germany
| | | | | | | | | | | | - Robert R. France
- Dyson Perrins Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, U.K
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28
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Marken F, Hayman CM, Bulman Page PC. Phosphate and arsenate electro-insertion processes into a N,N,N′,N′-tetraoctylphenylenediamine redox liquid. Electrochem commun 2002. [DOI: 10.1016/s1388-2481(02)00345-4] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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29
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Page PCB, Hayman CM, McFarland HL, Willock DJ, Galea NM. An IMDA Approach to Tigliane and Daphnane Diterpenoids: Generation of Rings A, B and C Incorporating C-18. Synlett 2002. [DOI: 10.1055/s-2002-22700] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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30
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Hayman CM, Hanton LR, Larsen DS, Guthrie JM. A Stereoselective Synthesis of 2,6-Dideoxy-6,6,6-trifluoro-arabino-hexoses via an Asymmetric Diels - Alder Strategy. Aust J Chem 1999. [DOI: 10.1071/ch99067] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The enantioselective syntheses of each enantiomer of ethyl
2,6-dideoxy-6,6,6-trifluoro-β-arabino-hexopyranoside
(3) and of 2,6-dideoxy-6,6,6-trifluoro-arabino-hexose
(4) are described. The key step in the approach is the inverse electron demand
Lewis acid catalysed Diels–Alder reaction of the heterodiene
(E)-1,1,1-trifluoro-4-[(1R)-1-
phenylethoxy]but-3-en-2-one (5) and either ethyl vinyl ether (7a) or
benzyl vinyl ether (7b). The titanium(IV) chloride catalysed cycloadditions at
low temperature displayed high endo-selectivity and
modest diastereofacial selectivity. Hydroboration of the mixture of the
cis-cycloadducts (8a) afforded the separable
diastereoisomers (9a) and (10a). Hydrogenolysis of (9a) gave ethyl
2,6-dideoxy-6,6,6-trifluoro-β-L-arabino-hexopyranoside
(+)-(3), and of (10a) gave the corresponding D-glycoside (−)-(3).
Similarly, hydroboration of the cis-cycloadducts (8b)
gave the protected benzyl glycosides (9b) and (10b). Hydrogenolysis of each
gave 2,6-dideoxy-6,6,6-trifluoro-L-arabino-hexopyranose
(−)-(4) and the corresponding D-sugar (+)-(4) respectively. The
absolute configurations of fluorinated carbohydrates (+)- and
(−)-(3) were determined by comparison of their molar rotations with
those of the parent glycosides. These assignments were confirmed by an X-ray
crystallographic structure determination of the glycoside (9a).
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31
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Abstract
The syntheses of
2,6-dideoxy-6,6,6-trifluoro-DL-arabino-hexose (4) and
the corresponding glycoside, ethyl
2,6-dideoxy-6,6,6-trifluoro-DL-arabino-hexopyranoside
(11), are described. The key step in the synthesis of (4) involved the Lewis
acid catalysed hetero-Diels–Alder reactions of
(E)-4-benzyloxy-1,1,1-trifluorobut-3-en-2-one and benzyl
vinyl ether. Hydroboration of the resulting cycloadduct, and hydrogenylitic
debenzylation gave (4) in a 59% overall yield. The ethyl glycoside (11)
was prepared in a similar manner from ethyl vinyl ether. A single-crystal
X-ray diffraction study confirmed the structural assignment of (11). The
O-glycosides (17) and (18) were formed from the boron
trifluoride etherate promoted reaction of the per-acetate of (4), i.e. (16),
and 2-naphthol. However, a similar reaction between
5-hydroxy-1,4-dimethoxynaphthalene and (16) gave the disubstituted
C-glycoside (19) in 52% yield.
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32
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Lever M, Sizeland PC, Bason LM, Hayman CM, Robson RA, Chambers ST. Abnormal glycine betaine content of the blood and urine of diabetic and renal patients. Clin Chim Acta 1994; 230:69-79. [PMID: 7850995 DOI: 10.1016/0009-8981(94)90090-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
In normal human plasma the concentrations of the renal osmolyte, glycine betaine, are usually between 20 and 70 mumol/l, in adult males (median 44 mumol/l) higher than in females (34 mumol/l). Concentrations are lower in renal disease (median 28 mumol/l) and normal in diabetes. Urinary excretion of glycine betaine shows no sex difference and is frequently elevated both in renal disease and in diabetes (medians: normal, 6.2, renal 12.3 and diabetes, 39.7 mmol/mol creatinine). The elevation in diabetes does not strongly correlate with known renal disease, nor with either urinary microalbumin or plasma creatinine. There is no correlation with glycated haemoglobin. The positive correlation with the excretions of another renal osmolyte, sorbitol, was highly significant in diabetic subjects. In the diabetic group there was also a significant negative correlation between plasma glycine betaine and urine microalbumin.
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Affiliation(s)
- M Lever
- Department of Biochemistry, Christchurch Hospital, New Zealand
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Abstract
In healthy human subjects, glycine betaine concentrations in the blood plasma are normally between 20 and 60 mumol/l, adult males tending to have higher concentrations than females. Proline betaine concentrations are more variable, ranging from undetectable to about 50 mumol/l. Both betaines are present in urine. Whereas the urinary excretion of proline betaine reflects plasma concentrations, with high clearance rates, there is no correlation between plasma and urine glycine betaine concentrations. The apparent clearance rates are low (usually less than 5%). The proline betaine content of human kidney tissue is less than 0.1% of the glycine betaine content, and this is true also of rabbit tissue despite high concentrations of both betaines in rabbit circulation and urine. These data suggest that glycine betaine, but not proline betaine, is important in human and other mammalian biochemistry.
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Affiliation(s)
- M Lever
- Department of Biochemistry, Christchurch Hospital, New Zealand
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34
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Peddie BA, Lever M, Hayman CM, Randall K, Chambers ST. Relationship between osmoprotection and the structure and intracellular accumulation of betaines by Escherichia coli. FEMS Microbiol Lett 1994; 120:125-31. [PMID: 8056284 DOI: 10.1111/j.1574-6968.1994.tb07018.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Naturally occurring betaines, especially glycine betaine and proline betaine, were accumulated by Escherichia coli from urine. In synthetic hyperosmotic medium, with an homologous series of added betaines, (CH3)3N(+)-(CH2)n-COO-, osmoprotective activity and intracellular accumulation decreased monotonically as n increased from 1 to 5. In contrast, alpha-substituted glycine betaines were accumulated in a similar manner to glycine betaine, but with different osmoprotective activities. Arsenobetaine, with a quaternary arsonium group, was also accumulated but amino acids which can become negatively charged in a chemically basic environment were not.
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Affiliation(s)
- B A Peddie
- Department of Nephrology, Christchurch Hospital, New Zealand
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35
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Lever M, Bason L, Leaver C, Hayman CM, Chambers ST. Same-day batch measurement of glycine betaine, carnitine, and other betaines in biological material. Anal Biochem 1992; 205:14-21. [PMID: 1443552 DOI: 10.1016/0003-2697(92)90572-o] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Glycine betaine, carnitine, carnitine esters, butyrobetaine, and proline betaine (stachydrine) concentrations in biological materials can be reliably measured in 100-microliters samples, with a detection limit below 1 mumol/liter. The procedure is suitable for batches of more than 30 specimens and it is possible to obtain a single result within 2 h. The betaines are extracted into an acetonitrile:methanol mixture, dried with anhydrous disodium hydrogen phosphate containing argentous oxide. The 4-bromophenacyl ester derivatives are formed using 4-bromophenacyl triflate as reagent, in the presence of solid magnesium oxide as base. The derivatives are separated by high-performance chromatography on a silica column, in a mixed partition and ion-exchange mode.
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Affiliation(s)
- M Lever
- Department of Clinical Biochemistry, Christchurch Hospital, New Zealand
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