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Sahaka M, Bornet O, Marchand A, Lafont D, Gontero B, Carrière F, Launay H. Monitoring galactolipid digestion and simultaneous changes in lipid-bile salt micellar organization by real-time NMR spectroscopy. Chem Phys Lipids 2024; 258:105361. [PMID: 37981224 DOI: 10.1016/j.chemphyslip.2023.105361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/08/2023] [Accepted: 11/10/2023] [Indexed: 11/21/2023]
Abstract
The use of Nuclear Magnetic Resonance spectroscopy for studying lipid digestion in vitro most often consists of quantifying lipolysis products after they have been extracted from the reaction medium using organic solvents. However, the current sensitivity level of NMR spectrometers makes possible to avoid the extraction step and continuously quantify the lipids directly in the reaction medium. We used real-time 1H NMR spectroscopy and guinea pig pancreatic lipase-related protein 2 (GPLRP2) as biocatalyst to monitor in situ the lipolysis of monogalactosyl diacylglycerol (MGDG) in the form of mixed micelles with the bile salt sodium taurodeoxycholate (NaTDC). Residual substrate and lipolysis products (monogalactosyl monoacylglycerol (MGMG); monogalactosylglycerol (MGG) and octanoic acid (OA) were simultaneously quantified throughout the reaction thanks to specific proton resonances. Lipolysis was complete with the release of all MGDG fatty acids. These results were confirmed by thin layer chromatography (TLC) and densitometry after lipid extraction at different reaction times. Using diffusion-ordered NMR spectroscopy (DOSY), we could also estimate the diffusion coefficients of all the reaction compounds and deduce the hydrodynamic radius of the lipid aggregates in which they were present. It was shown that MGDG-NaTDC mixed micelles with an initial hydrodynamic radius rH of 7.3 ± 0.5 nm were changed into smaller micelles of NaTDC-MGDG-MGMG of 2.3 ± 0.5 nm in the course of the lipolysis reaction, and finally into NaTDC-OA mixed micelles (rH of 2.9 ± 0.5 nm) and water soluble MGG. These results provide a better understanding of the digestion of galactolipids by PLRP2, a process that leads to the complete micellar solubilisation of their fatty acids and renders their intestinal absorption possible.
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Affiliation(s)
- Moulay Sahaka
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France
| | - Olivier Bornet
- NMR Platform, Institut de Microbiologie de la Méditerranée, Aix Marseille Univ, 13009 Marseille, France
| | - Achille Marchand
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France
| | - Dominique Lafont
- Laboratoire de Chimie Organique 2-GLYCO, ICBMS UMR 5246, CNRS-Université Claude Bernard Lyon 1, Université de Lyon, bâtiment Lederer, 1 rue Victor Grignard, 69622 Villeurbanne Cedex, France
| | - Brigitte Gontero
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France
| | - Frédéric Carrière
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France.
| | - Hélène Launay
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France.
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Sahaka M, Mateos-Diaz E, Amara S, Wattanakul J, Gray D, Lafont D, Gontero B, Launay H, Carrière F. In situ monitoring of galactolipid digestion by infrared spectroscopy in both model micelles and spinach chloroplasts. Chem Phys Lipids 2023; 252:105291. [PMID: 36918051 DOI: 10.1016/j.chemphyslip.2023.105291] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 03/01/2023] [Accepted: 03/09/2023] [Indexed: 03/14/2023]
Abstract
Galactolipids are the main lipids from plant photosynthetic membranes and they can be digested by pancreatic lipase related protein 2 (PLRP2), an enzyme found in the pancreatic secretion in many animal species. Here, we used transmission Fourier-transform infrared spectroscopy (FTIR) to monitor continuously the hydrolysis of galactolipids by PLRP2, in situ and in real time. The method was first developed with a model substrate, a synthetic monogalactosyl diacylglycerol with 8-carbon acyl chains (C8-MGDG), in the form of mixed micelles with a bile salt, sodium taurodeoxycholate (NaTDC). The concentrations of the residual substrate and reaction products (monogalactosylmonoglyceride, MGMG; monogalactosylglycerol, MGG; octanoic acid) were estimated from the carbonyl and carboxylate vibration bands after calibration with reference standards. The results were confirmed by thin layer chromatography analysis (TLC) and specific staining of galactosylated compounds with thymol and sulfuric acid. The method was then applied to the lipolysis of more complex substrates, a natural extract of MGDG with long acyl chains, micellized with NaTDC, and intact chloroplasts isolated from spinach leaves. After a calibration performed with α-linolenic acid, the main fatty acid (FA) found in plant galactolipids, FTIR allowed quantitative measurement of chloroplast lipolysis by PLRP2. A full release of FA from membrane galactolipids was observed, that was not dependent on the presence of bile salts. Nevertheless, the evolution of amide vibration band in FTIR spectra suggested the interaction of membrane proteins with NaTDC and lipolysis products.
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Affiliation(s)
- Moulay Sahaka
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France
| | - Eduardo Mateos-Diaz
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France
| | - Sawsan Amara
- Lipolytech, Zone Luminy Biotech, 163 avenue de Luminy, 13288 Marseille Cedex 09, France
| | - Jutarat Wattanakul
- Division of Food, Nutrition and Dietetics, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom; Department of Food Science and Technology, Faculty of Home Economics Technology, Rajamangala University of Technology Krungthep, Bangkok 10120, Thailand
| | - David Gray
- Division of Food, Nutrition and Dietetics, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, United Kingdom
| | - Dominique Lafont
- Laboratoire de Chimie Organique 2-GLYCO, ICBMS UMR 5246, CNRS-Université Claude Bernard Lyon 1, Université de Lyon, bâtiment Lederer, 1 rue Victor Grignard, 69622 Villeurbanne Cedex, France
| | - Brigitte Gontero
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France
| | - Hélène Launay
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France
| | - Frédéric Carrière
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France.
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Sahaka M, Amara S, Lecomte J, Rodier JD, Lafont D, Villeneuve P, Gontero B, Carrière F. Quantitative monitoring of galactolipid hydrolysis by pancreatic lipase-related protein 2 using thin layer chromatography and thymol-sulfuric acid derivatization. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1173:122674. [PMID: 33827017 DOI: 10.1016/j.jchromb.2021.122674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/11/2021] [Accepted: 03/15/2021] [Indexed: 11/17/2022]
Abstract
Galactolipids are the most abundant lipids on earth where they are mainly found in photosynthetic membranes of plant, algae, and cyanobacteria. Pancreatic lipase-related protein 2 (PLRP2) is an enzyme with galactolipase activity allowing mammals, especially herbivores, to digest this important source of fatty acids. We present a method for the quantitative analysis of galactolipids and galactosylated products resulting from their digestion by guinea pig PLRP2 (GPLRP2), using thin-layer-chromatography (TLC), thymol-sulfuric acid as derivatization reagent and scanning densitometry for detection. Thymol-sulfuric acid reagent has been used for the colorimetric detection of carbohydrates. It is shown here that the derivatization of galactosyl group from galactolipids by this reagent is not affected by the bound acyl glycerol, acyl chains length and number of galactose residues in the polar head. This allowed quantifying simultaneously the initial substrate and all galactosylated products generated upon the hydrolysis of monogalactosyl di-octanoylglycerol (C8-MGDG) by GPLRP2 using a single calibration with C8-MGDG as reference standard. The reaction products, monogalactosyl monooctanoyl glycerol (C8-MGMG) and monogalactosyl glycerol (MGG), were identified and quantified, MGG being recovered from the aqueous phase and analyzed by a separate TLC analysis. This method is therefore suitable to quantify the products resulting from the release of both fatty acids present in MGDG and thereby shows that PLRP2 can contribute to the complete digestion of galactolipids and further intestinal absorption of their fatty acids.
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Affiliation(s)
- Moulay Sahaka
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France
| | - Sawsan Amara
- Lipolytech, Zone Luminy Biotech, 163 avenue de Luminy, 13288 Marseille Cedex 09, France
| | | | | | - Dominique Lafont
- Laboratoire de Chimie Organique 2-GLYCO, ICBMS UMR 5246, CNRS-Université Claude Bernard Lyon 1, Université de Lyon, bâtiment Lederer, 1 rue Victor Grignard, 69622 Villeurbanne Cedex, France
| | | | - Brigitte Gontero
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France
| | - Frédéric Carrière
- Aix Marseille Univ, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, 31 Chemin Joseph Aiguier, 13009 Marseille, France.
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Belhaj I, Amara S, Parsiegla G, Sutto-Ortiz P, Sahaka M, Belghith H, Rousset A, Lafont D, Carrière F. Galactolipase activity of Talaromyces thermophilus lipase on galactolipid micelles, monomolecular films and UV-absorbing surface-coated substrate. Biochim Biophys Acta Mol Cell Biol Lipids 2018; 1863:1006-1015. [PMID: 29859246 DOI: 10.1016/j.bbalip.2018.05.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 05/08/2018] [Accepted: 05/29/2018] [Indexed: 10/16/2022]
Abstract
Talaromyces thermophilus lipase (TTL) was found to hydrolyze monogalactosyl diacylglycerol (MGDG) and digalactosyl diacylglycerol (DGDG) substrates presented in various forms to the enzyme. Different assay techniques were used for each substrate: pHstat with dioctanoyl galactolipid-bile salt mixed micelles, barostat with dilauroyl galactolipid monomolecular films spread at the air-water interface, and UV absorption using a novel MGDG substrate containing α-eleostearic acid as chromophore and coated on microtiter plates. The kinetic properties of TTL were compared to those of the homologous lipase from Thermomyces lanuginosus (TLL), guinea pig pancreatic lipase-related protein 2 and Fusarium solani cutinase. TTL was found to be the most active galactolipase, with a higher activity on micelles than on monomolecular films or surface-coated MGDG. Nevertheless, the UV absorption assay with coated MGDG was highly sensitive and allowed measuring significant activities with about 10 ng of enzymes, against 100 ng to 10 μg with the pHstat. TTL showed longer lag times than TLL for reaching steady state kinetics of hydrolysis with monomolecular films or surface-coated MGDG. These findings and 3D-modelling of TTL based on the known structure of TLL pointed out to two phenylalanine to leucine substitutions in TTL, that could be responsible for its slower adsorption at lipid-water interface. TTL was found to be more active on MGDG than on DGDG using both galactolipid-bile salt mixed micelles and galactolipid monomolecular films. These later experiments suggest that the second galactose on galactolipid polar head impairs the enzyme adsorption on its aggregated substrate.
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Affiliation(s)
- Inès Belhaj
- Laboratoire de Biotechnologie Moléculaire des Eucaryotes, Centre de Biotechnologies de Sfax, Université de Sfax, BP "1177", 3018 Sfax, Tunisia.
| | - Sawsan Amara
- Aix-Marseille Université, CNRS, Bioénergétique et Ingénierie des Protéines UMR 7281, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France; Lipolytech, Zone Luminy Biotech Entreprises Case 922, 163 avenue de Luminy, 13288 Marseille Cedex 09, France
| | - Goetz Parsiegla
- Aix-Marseille Université, CNRS, Bioénergétique et Ingénierie des Protéines UMR 7281, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Priscila Sutto-Ortiz
- Aix-Marseille Université, CNRS, Bioénergétique et Ingénierie des Protéines UMR 7281, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Moulay Sahaka
- Aix-Marseille Université, CNRS, Bioénergétique et Ingénierie des Protéines UMR 7281, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Hafedh Belghith
- Laboratoire de Biotechnologie Moléculaire des Eucaryotes, Centre de Biotechnologies de Sfax, Université de Sfax, BP "1177", 3018 Sfax, Tunisia
| | - Audric Rousset
- Laboratoire de Chimie Organique II-Glycochimie, ICBMS UMR 5246, CNRS-Université Claude Bernard Lyon 1, Université de Lyon, Bâtiment Curien, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
| | - Dominique Lafont
- Laboratoire de Chimie Organique II-Glycochimie, ICBMS UMR 5246, CNRS-Université Claude Bernard Lyon 1, Université de Lyon, Bâtiment Curien, 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France
| | - Frédéric Carrière
- Aix-Marseille Université, CNRS, Bioénergétique et Ingénierie des Protéines UMR 7281, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France.
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Topkaya D, Ng S, Bretonnière Y, Lafont D, Chung L, Lee H, Dumoulin F. Design, synthesis and phototoxicity studies of novel iodinated amphiphilic porphyrins. Photodiagnosis Photodyn Ther 2017. [DOI: 10.1016/j.pdpdt.2017.01.137] [Citation(s) in RCA: 3] [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: 11/25/2022]
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Topkaya D, Ng SY, Bretonnière Y, Lafont D, Chung LY, Lee HB, Dumoulin F. Iodination improves the phototoxicity of an amphiphilic porphyrin. Photodiagnosis Photodyn Ther 2016; 16:12-14. [PMID: 27475243 DOI: 10.1016/j.pdpdt.2016.07.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 07/14/2016] [Accepted: 07/21/2016] [Indexed: 11/18/2022]
Affiliation(s)
- Derya Topkaya
- University of Dokuz Eylül, Department of Chemistry, Faculty of Science, 35160, Tınaztepe, Izmir, Turkey.
| | - Shie Yin Ng
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Yann Bretonnière
- ENS Lyon, Université de Lyon, Laboratoire de Chimie de l'ENS Lyon, UMR 5182 CNRS-ENS Lyon, 46 allée d'Italie, 69364 Lyon, France
| | - Dominique Lafont
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CO2-Glyco, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, 43 Boulevard du 11 Novembre 1918, F-6922 Villeurbanne, France
| | - Lip Yong Chung
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Hong Boon Lee
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Fabienne Dumoulin
- Gebze Technical University, Department of Chemistry, P.O. Box 141, 41400 Gebze, Kocaeli, Turkey.
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Topkaya D, Lafont D, Poyer F, Garcia G, Albrieux F, Maillard P, Bretonnière Y, Dumoulin F. Design of an amphiphilic porphyrin exhibiting high in vitro photocytotoxicity. NEW J CHEM 2016. [DOI: 10.1039/c5nj02716k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A promising photosensitiser, which exhibits extremely suitable properties for photodynamic applications is described.
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Affiliation(s)
- Derya Topkaya
- Gebze Technical University
- Department of Chemistry
- 41400 Gebze Kocaeli
- Turkey
- University of Dokuz Eylül
| | - Dominique Lafont
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires
- CO2-Glyco
- UMR 5246
- CNRS
- Université Claude Bernard Lyon 1
| | - Florent Poyer
- Institut Curie
- Research Center
- Chemistry
- Modelisation and Imaging for Biology (CMIB) Bât 110-112
- Centre Universitaire
| | - Guillaume Garcia
- Institut Curie
- Research Center
- Chemistry
- Modelisation and Imaging for Biology (CMIB) Bât 110-112
- Centre Universitaire
| | - Florian Albrieux
- Centre Commun de Spectrométrie de Masse UMR 5246
- CNRS-Claude Bernard Lyon 1
- Université de Lyon
- 69622 Villeurbanne Cedex
- France
| | - Philippe Maillard
- Institut Curie
- Research Center
- Chemistry
- Modelisation and Imaging for Biology (CMIB) Bât 110-112
- Centre Universitaire
| | - Yann Bretonnière
- ENS Lyon
- Université de Lyon
- Laboratoire de Chimie de l’ENS Lyon
- UMR 5182 CNRS-ENS Lyon
- 69364 Lyon
| | - Fabienne Dumoulin
- Gebze Technical University
- Department of Chemistry
- 41400 Gebze Kocaeli
- Turkey
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Banoub JH, Demian WLL, Piazzetta P, Sarkis G, Kanawati B, Lafont D, Laurent N, Vaillant C, Randell E, Giorgi G, Fridgen TD. The in situ gas-phase formation of a C-glycoside ion obtained during electrospray ionization tandem mass spectrometry. A unique intramolecular mechanism involving an ion-molecule reaction. Rapid Commun Mass Spectrom 2015; 29:1717-1732. [PMID: 26331922 DOI: 10.1002/rcm.7269] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 06/08/2015] [Accepted: 06/25/2015] [Indexed: 06/05/2023]
Abstract
RATIONALE This study examines the electrospray ionization mass spectrometry (ESI-MS), in-source collision-induced dissociation (CID) fragmentation and low-energy collision-induced dissociation tandem mass spectrometry (CID-MS/MS) of a synthetic pair of β- and α-anomers of the amphiphilic cholesteryl polyethoxy neoglycolipids containing the 2-azido-2-deoxy-D-galactosyl-D-GalN3 moiety. We describe the novel and unique in situ gas-phase formation of a C-glycoside ion formed during all these gas-phase processes and propose a reasonable mechanism for its formation. METHODS The synthetic amphiphilic glycolipids were composed of the 2-deoxy-2-azido-D-galactosyl moiety (GalN3, the hydrophilic part) covalently attached to a polyethoxy spacer which is covalently linked to the cholesteryl moiety (hydrophobic part). The 2-azido-2-deoxy-α- and β-D-galactosyl-containing glycolipids were studied by in-time and in-space ESI-MS and CID-MS/MS in positive ion mode, with quadrupole ion trap (QIT), quadrupole-quadrupole-time-of-flight (QqTOF), and Fourier transform ion cyclotron resonance (FTICR) instruments. RESULTS Conventional single-stage ESI-MS analysis showed the formation of the protonated molecule. During the single-stage ESI-MS analysis and the CID-MS/MS of the [M+H](+) and [M+NH4](+) adducts obtained from both glycolipid anomers, the presence of a series of specific product ions with different intensities was observed, consistent with the [C-glycoside+H-N2](+), [cholestadiene+H](+), 2-deoxy-2-D-azido-galactosyl [GalN3](+), [GalNH](+) and [sugar-Spacer+H](+) ions. CONCLUSIONS The gas-phase formation of the [C-glycoside+H-N2](+) ion isolated from the glycolipid anomers was observed during both the ESI-MS of the glycolipids and the CID-MS/MS analyses of the [M+H](+) ions and it was found to occur by an intramolecular rearrangement involving an ion-molecule complex. CID-QqTOF-MS/MS and CID-FTICR-MS(2) analysis allowed the differentiation of the two glycolipid anomers and showed noticeable variation in the intensities of the product ions.
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Affiliation(s)
- Joseph H Banoub
- Department of Biochemistry, Memorial University of Newfoundland, St. John's Newfoundland, 232 Elizabeth Avenue, A1B 3X9, Canada
- Fisheries and Oceans Canada, Science Branch, St. John's Newfoundland, 80 East White Hills Road, A1C 5X1, Canada
- Department of Chemistry, Memorial University of Newfoundland, St. John's Newfoundland, 232 Elizabeth Avenue, A1B 3X7, Canada
| | - Wael L L Demian
- Department of Biochemistry, Memorial University of Newfoundland, St. John's Newfoundland, 232 Elizabeth Avenue, A1B 3X9, Canada
| | - Paolo Piazzetta
- Department of Chemistry and Chemical Technology, University of Calabria, via P Bucci, Arcavacata di Rende, (CS), Italy
| | - George Sarkis
- Department of Chemistry, Memorial University of Newfoundland, St. John's Newfoundland, 232 Elizabeth Avenue, A1B 3X7, Canada
| | - Basem Kanawati
- Helmholtz Zentrum Muenchen, Research Unit Analytical Biogeochemistry, IngolstaedterLandstr. 1, D-85764, Neuherberg, Germany
| | - Dominique Lafont
- ICBMS-UMR 5246, Laboratoire LCO2-GLYCO, Université de Lyon, Université Claude Bernard Lyon 1, 43 bd du 11 Novembre 1918, 69622, Villeurbanne Cedex, France
| | - Nicolas Laurent
- ICBMS-UMR 5246, Laboratoire LCO2-GLYCO, Université de Lyon, Université Claude Bernard Lyon 1, 43 bd du 11 Novembre 1918, 69622, Villeurbanne Cedex, France
| | - Celine Vaillant
- Department of Chemistry, Memorial University of Newfoundland, St. John's Newfoundland, 232 Elizabeth Avenue, A1B 3X7, Canada
| | - Edward Randell
- Division of Laboratory Medicine, Faculty of Medicine, Memorial University of Newfoundland, Health Sciences Centre, 300 Prince Philip Drive, St. John's Newfoundland, A1B 3V6, Canada
| | - Gianluca Giorgi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via Aldo Moro, I-53100, Siena, Italy
| | - Travis D Fridgen
- Department of Chemistry, Memorial University of Newfoundland, St. John's Newfoundland, 232 Elizabeth Avenue, A1B 3X7, Canada
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Wang S, Cuesta-Seijo JA, Striebeck A, Lafont D, Palcic MM, Vidal S. Design of Glycosyltransferase Inhibitors: Serine Analogues as Pyrophosphate Surrogates? Chempluschem 2015; 80:1525-1532. [DOI: 10.1002/cplu.201500282] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Indexed: 01/07/2023]
Affiliation(s)
- Shuai Wang
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires; Laboratoire de Chimie Organique 2-Glycochimie, UMR 5246; CNRS and Université Claude Bernard Lyon 1; 43 Boulevard du 11 Novembre 1918 69622 Villeurbanne France
| | | | | | - Dominique Lafont
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires; Laboratoire de Chimie Organique 2-Glycochimie, UMR 5246; CNRS and Université Claude Bernard Lyon 1; 43 Boulevard du 11 Novembre 1918 69622 Villeurbanne France
| | - Monica M. Palcic
- Carlsberg Laboratory; Gamle Carlsberg Vej 10 1799 Copenhagen V Denmark
- Department of Biochemistry and Microbiology; University of Victoria; Victoria BC V8W 3P6 Canada
| | - Sébastien Vidal
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires; Laboratoire de Chimie Organique 2-Glycochimie, UMR 5246; CNRS and Université Claude Bernard Lyon 1; 43 Boulevard du 11 Novembre 1918 69622 Villeurbanne France
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Le Chevalier Isaad A, Carrara P, Stano P, Krishnakumar KS, Lafont D, Zamboulis A, Buchet R, Bouchu D, Albrieux F, Strazewski P. A hydrophobic disordered peptide spontaneously anchors a covalently bound RNA hairpin to giant lipidic vesicles. Org Biomol Chem 2015; 12:6363-73. [PMID: 24915577 DOI: 10.1039/c4ob00721b] [Citation(s) in RCA: 9] [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: 01/13/2023]
Abstract
The attraction of nucleic acids to lipidic compartments is the first step for carriers of potentially inheritable information to self-organise in functionalised synthetic cells. Confocal fluorescence imaging shows that a synthetic amphiphilic peptidyl RNA molecule spontaneously accumulates at the outer bilayer membranes of phospho- and glycolipidic giant vesicles. Cooperatively attractive interactions of -3.4 to -4.0 kcal mol(-1) between a random coil hydrophobic peptide and lipid membranes can thus pilot lipophobic RNA to its compartmentation. The separation of mixed lipid phases in the membranes further enhances the local concentration of anchored RNA.
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Affiliation(s)
- Alexandra Le Chevalier Isaad
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (Unité Mixte de Recherche 5246), Université de Lyon, Claude Bernard Lyon 1, 69622 Villeurbanne Cedex, Lyon, France.
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Wang S, Galanos N, Rousset A, Buffet K, Cecioni S, Lafont D, Vincent SP, Vidal S. Fucosylation of triethyleneglycol-based acceptors into 'clickable' α-fucosides. Carbohydr Res 2014; 395:15-8. [PMID: 24995912 DOI: 10.1016/j.carres.2014.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 05/20/2014] [Accepted: 06/04/2014] [Indexed: 11/30/2022]
Abstract
Design of multivalent glycoconjugates can find applications such as in anti-adhesive therapy against bacterial infections. Nevertheless, the access to such macromolecules requires functionalized building blocks prepared in a minimum number of steps and on a multi-gram scale at least for the laboratory. Fucose is a representative epitope used by several bacteria for adhesion to their host cells. The stereoselective, rapid, and efficient access to two 'clickable' α-fucosides was re-investigated using PPh3/CBr4-promoted glycosylation of chloro- (as precursors of azido-) and alkyne-functionalized triethyleneglycols with fully unprotected l-fucose. The convenient access to such building blocks paves the way to the design of new multivalent glycoconjugates functionalized with fucose epitopes and their applications.
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Affiliation(s)
- Shuai Wang
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CO2-Glyco, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France
| | - Nicolas Galanos
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CO2-Glyco, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France
| | - Audric Rousset
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CO2-Glyco, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France
| | - Kevin Buffet
- Department of Chemistry, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Samy Cecioni
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CO2-Glyco, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France
| | - Dominique Lafont
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CO2-Glyco, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France
| | - Stéphane P Vincent
- Department of Chemistry, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Sébastien Vidal
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, CO2-Glyco, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France.
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Wang S, Shen DL, Lafont D, Vercoutter-Edouart AS, Mortuaire M, Shi Y, Maniti O, Girard-Egrot A, Lefebvre T, Pinto BM, Vocadlo D, Vidal S. Design of glycosyltransferase inhibitors targeting human O-GlcNAc transferase (OGT). Med Chem Commun 2014. [DOI: 10.1039/c4md00063c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Inhibition of glycosyltransferases requires the design of neutral inhibitors to allow cell permeation as mimicks of their natural dianionic substrates.
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Wang S, Cuesta-Seijo JA, Lafont D, Palcic MM, Vidal S. Design of glycosyltransferase inhibitors: pyridine as a pyrophosphate surrogate. Chemistry 2013; 19:15346-57. [PMID: 24108680 DOI: 10.1002/chem.201301871] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 07/25/2013] [Indexed: 12/12/2022]
Abstract
A series of ten glycosyltransferase inhibitors has been designed and synthesized by using pyridine as a pyrophosphate surrogate. The series was prepared by conjugation of carbohydrate, pyridine, and nucleoside building blocks by using a combination of glycosylation, the Staudinger-Vilarrasa amide-bond formation, and azide-alkyne click chemistry. The compounds were evaluated as inhibitors of five metal-dependent galactosyltransferases. Crystallographic analyses of three inhibitors complexed in the active site of one of the enzymes confirmed that the pyridine moiety chelates the Mn(2+) ion causing a slight displacement (2 Å) from its original position. The carbohydrate head group occupies a different position than in the natural uridine diphosphate (UDP)-Gal substrate with little interaction with the enzyme.
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Affiliation(s)
- Shuai Wang
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Laboratoire de Chimie Organique 2, Glycochimie, UMR 5246, CNRS and Université Claude Bernard Lyon 1, 43 Boulevard du 11 Novembre 1918, 6922 Villeurbanne (France), Fax: (+33) 472-448-109
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Lafont D, Zorlu Y, Savoie H, Albrieux F, Ahsen V, Boyle RW, Dumoulin F. Monoglycoconjugated phthalocyanines: Effect of sugar and linkage on photodynamic activity. Photodiagnosis Photodyn Ther 2013; 10:252-9. [DOI: 10.1016/j.pdpdt.2012.11.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Revised: 11/20/2012] [Accepted: 11/23/2012] [Indexed: 12/21/2022]
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Wang S, Lafont D, Rahkila J, Picod B, Leino R, Vidal S. Glycosylation of ‘basic’ alcohols: methyl 6-(hydroxymethyl)picolinate as a case study. Carbohydr Res 2013; 372:35-46. [DOI: 10.1016/j.carres.2013.02.009] [Citation(s) in RCA: 7] [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] [Received: 01/10/2013] [Revised: 02/14/2013] [Accepted: 02/15/2013] [Indexed: 11/28/2022]
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Amara S, Lafont D, Parsiegla G, Point V, Chabannes A, Rousset A, Carrière F. The galactolipase activity of some microbial lipases and pancreatic enzymes. EUR J LIPID SCI TECH 2013. [DOI: 10.1002/ejlt.201300004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zorlu Y, Dumoulin F, Bouchu D, Ahsen V, Lafont D. Monoglycoconjugated water-soluble phthalocyanines. Design and synthesis of potential selectively targeting PDT photosensitisers. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.10.044] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Belem-Gonçalves S, Matar G, Tsan P, Lafont D, Boullanger P, Salim VM, Alves TL, Lancelin JM, Besson F. Hyaluronidase binds differently DPPC, DPPS or GlcNAc-bearing glycolipid biomimetic monolayers. Colloids Surf B Biointerfaces 2010; 75:466-71. [DOI: 10.1016/j.colsurfb.2009.09.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 09/14/2009] [Accepted: 09/16/2009] [Indexed: 11/26/2022]
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Ermeydan MA, Dumoulin F, Basova TV, Bouchu D, Gürek AG, Ahsen V, Lafont D. Amphiphilic carbohydrate–phthalocyanine conjugates obtained by glycosylation or by azide–alkyne click reaction. NEW J CHEM 2010. [DOI: 10.1039/b9nj00634f] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Amara S, Lafont D, Fiorentino B, Boullanger P, Carrière F, De Caro A. Continuous measurement of galactolipid hydrolysis by pancreatic lipolytic enzymes using the pH-stat technique and a medium chain monogalactosyl diglyceride as substrate. Biochim Biophys Acta Mol Cell Biol Lipids 2009; 1791:983-90. [DOI: 10.1016/j.bbalip.2009.05.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Revised: 05/04/2009] [Accepted: 05/11/2009] [Indexed: 11/25/2022]
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Cavalier JF, Lafont D, Boullanger P, Houisse D, Giallo J, Ballester JM, Carrière F. Validation of lipolysis product extraction from aqueous/biological samples, separation and quantification by thin-layer chromatography with flame ionization detection analysis using O-cholesteryl ethylene glycol as a new internal standard. J Chromatogr A 2009; 1216:6543-8. [PMID: 19671473 DOI: 10.1016/j.chroma.2009.07.061] [Citation(s) in RCA: 19] [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] [Received: 04/06/2009] [Revised: 07/15/2009] [Accepted: 07/29/2009] [Indexed: 11/26/2022]
Abstract
A general and easily accessible method for the extraction followed by the simultaneous separation and quantitative determination of triacylglycerols, diacylglycerols, monoacylglycerols and free fatty acids has been improved and optimized based on existing protocols using liquid-phase extraction and thin-layer chromatography coupled to flame ionization detection (TLC/FID Iatroscan). After lipid extraction in the presence of a suitable new synthetic internal standard, namely CholE1, a single elution step using n-heptane/diethyl ether/formic acid (55:45:1, v/v/v) was applied. This method was validated in line with international bioanalytical method validation guidelines using two different matrix systems: purified water and human gastro-intestinal fluid. Overall, the assay was found to have high levels of precision with coefficients of variation ranging from 1.48% to 11.0% and accuracy ranging from -13.3% to +5.79% RE. The confidence limits of the lipid mean recovery rates varied between 89.9% and 104%. This method is therefore highly suitable for quantifying the lipolysis products generated in vitro during the hydrolysis of various fats and oils by digestive lipases, as well as those collected from the gastro-intestinal tract in the course of human clinical studies on lipid digestion.
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Affiliation(s)
- Jean-François Cavalier
- CNRS-Aix-Marseille Université, Enzymologie Interfaciale et Physiologie de la Lipolyse, UPR 9025, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France.
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Otman O, Boullanger P, Lafont D, Hamaide T. New Amphiphilic Glycopolymers Based on a Polycaprolactone-maleic anhydride Copolymer Backbone: Characterization by15N NMR and Application to Colloidal Stabilization of Nanoparticles. MACROMOL CHEM PHYS 2008. [DOI: 10.1002/macp.200800300] [Citation(s) in RCA: 10] [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: 11/11/2022]
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Goodby JW, Görtz V, Cowling SJ, Mackenzie G, Martin P, Plusquellec D, Benvegnu T, Boullanger P, Lafont D, Queneau Y, Chambert S, Fitremann J. Thermotropic liquid crystalline glycolipids. Chem Soc Rev 2007; 36:1971-2032. [PMID: 17982519 DOI: 10.1039/b708458g] [Citation(s) in RCA: 131] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Are the liquid crystalline properties of the materials of living systems important in biological structures, functions, diseases and treatments? There is a growing consciousness that the observed lyotropic, and often thermotropic liquid crystallinity, of many biological materials that possess key biological functionality might be more than curious coincidence. Rather, as the survival of living systems depends on the flexibility and reformability of structures, it seems more likely that it is the combination of softness and structure of the liquid-crystalline state that determines the functionality of biological materials. The richest sources of liquid crystals derived from living systems are found in cell membranes, of these glycolipids are a particularly important class of components. In this critical review, we will examine the relationship between chemical structure and the self-assembling and self-organising properties of glycolipids that ultimately lead to mesophase formation.
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Affiliation(s)
- J W Goodby
- Department of Chemistry, The University of York, York, UK YO10 5DD
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Eydoux C, De Caro J, Ferrato F, Boullanger P, Lafont D, Laugier R, Carrière F, De Caro A. Further biochemical characterization of human pancreatic lipase-related protein 2 expressed in yeast cells. J Lipid Res 2007; 48:1539-49. [PMID: 17401110 DOI: 10.1194/jlr.m600486-jlr200] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [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: 11/20/2022] Open
Abstract
Recombinant human pancreatic lipase-related protein 2 (rHPLRP2) was produced in the protease A-deficient yeast Pichia pastoris. A major protein with a molecular mass of 50 kDa was purified from the culture medium using SP-Sepharose and Mono Q chromatography. The protein was found to be highly sensitive to the proteolytic cleavage of a peptide bond in the lid domain. The proteolytic cleavage process occurring in the lid affected both the lipase and phospholipase activities of rHPLRP2. The substrate specificity of the nonproteolyzed rHPLRP2 was investigated using pH-stat and monomolecular film techniques and various substrates (glycerides, phospholipids, and galactolipids). All of the enzyme activities were maximum at alkaline pH values and decreased in the pH 5-7 range corresponding to the physiological conditions occurring in the duodenum. rHPLRP2 was found to act preferentially on substrates forming small aggregates in solution (monoglycerides, egg phosphatidylcholine, and galactolipids) rather than on emulsified substrates such as triolein and diolein. The activity of rHPLRP2 on monogalactosyldiglyceride and digalactosyldiglyceride monomolecular films was determined and compared with that of guinea pig pancreatic lipase-related protein 2, which shows a large deletion in the lid domain. The presence of a full-length lid domain in rHPLRP2 makes it possible for enzyme activity to occur at higher surface pressures. The finding that the inhibition of nonproteolyzed rHPLRP2 by tetrahydrolipstatin and diethyl-p-nitrophenyl phosphate does not involve any bile salt requirements suggests that the rHPLRP2 lid adopts an open conformation in aqueous media.
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Affiliation(s)
- Cécilia Eydoux
- Laboratoire d'Enzymologie Interfaciale et de Physiologie de la Lipolyse, Centre National de la Recherche Scientifique-Institut de Biologie Structurale et Microbiologie, 13402 Marseille Cedex 20, France
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Dumoulin F, Lafont D, Huynh TL, Boullanger P, Mackenzie G, West JJ, Goodby JW. Synthesis and Liquid Crystalline Properties of Mono-, Di- and Tri-O-alkyl Pentaerythritol Derivatives Bearing Tri-, Di- or Monogalactosyl Heads: The Effects of Curvature of Molecular Packing on Mesophase Formation. Chemistry 2007; 13:5585-600. [PMID: 17310498 DOI: 10.1002/chem.200601702] [Citation(s) in RCA: 8] [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: 11/11/2022]
Abstract
Self-organisation and self-assembly are critical to the stability of synthetic and biological membranes. Of particular importance is consideration of the packing arrangements of the various molecular species. Both phospho- and glycolipids can pack in ways in which curvature can be introduced into self-organised or self-assembled systems. For instance, it is known that the degree of curvature can affect the structures of any condensed phases that are formed. In this article we report on a systematic study in which we have varied the shapes of glycolipids and examined the condensed phases that they form. In doing so, we have also unified the shape dependency of lyotropic liquid crystals with those of thermotropic liquid crystals. In order to undertake this systematic study a range of different pentaerythritol derivatives was synthesized, which covers combinations of one to three alkyl chains of different lengths (6,7,9,10,11,12,14,16 carbon atoms) and three to one galactosyl heads. Mono- and di-O-galactosyl derivatives were prepared directly by glycosylation of the corresponding alcohols using 2,3,4,6-tetra-O-benzoyl or acetyl-alpha-D-galactopyranosyl trichloroacetimidate or bromide as the donors; the tri-O-galactosyl derivatives were synthesized from O-alkyl-O-benzyl di-O-galactosyl pentaerythritol intermediates, followed by de-O-benzylation and glycosylation steps. All of the fully deprotected products were obtained by standard methods, and their self-organising and self-assembling properties examined.
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Affiliation(s)
- Fabienne Dumoulin
- Université de Lyon, Laboratoire de Chimie Organique II, Unité Mixte de Recherche CNRS 5181, Université Lyon 1, Chimie Physique Electronique de Lyon, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne, France
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El-Aneed A, Banoub J, Koen-Alonso M, Boullanger P, Lafont D. Establishment of mass spectrometric fingerprints of novel synthetic cholesteryl neoglycolipids: the presence of a unique C-glycoside species during electrospray ionization and during collision-induced dissociation tandem mass spectrometry. J Am Soc Mass Spectrom 2007; 18:294-310. [PMID: 17088074 DOI: 10.1016/j.jasms.2006.09.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2006] [Revised: 09/25/2006] [Accepted: 09/28/2006] [Indexed: 05/12/2023]
Abstract
In this study we evaluated the fragmentation pattern of 16 novel amphiphilic neoglycolipid cholesteryl derivatives that can be efficiently used to increase cationic liposomal stability and to enhance gene transfer ability. These neoglycolipids bear different sugar moieties, such as D-glucosamine, N-acetyl-D-glucosamine, N-trideuterioacetyl-D-glucosamine, N-acetyllactosamine, L-fucose, N-allyloxycarbonyl-D-glucosamine, and some of their per-O-acetylated derivatives. Regardless of the structure of the tested neoglycolipid, QqToF-MS analysis using electrospray ionization (ESI) source showed abundant protonated [M+H]+ species. We also identified by both QqToF-MS and low-energy collision tandem mass spectrometry (CID-MS/MS) of the [M+H]+ ion, the presence of specific common fingerprint fragment ions: [Cholestene]+, sugar [oxonium]+, [(Sugar-spacer-OH)+H]+, [oxonium-H2O]+, and [(Cholesterol-spacer-OH)+H]+. In addition, we observed a unique ion that could not be rationally explained by the expected fragmentation of these amphiphilic molecules. The structure of this ion was tentatively proposed with that of a C-glycoside species formed by a chemical reaction between the sugar portion and the cholesterol. MS/MS analysis of this unique [C-glycoside]+ confirmed the validity of the proposed structure of this ion. The presence of an amino group at position C-2 and free hydroxyl groups of the sugar motif is crucial for the formation of a "reactive" sugar oxonium ion that can form the [C-glycoside]+ species. In summary, we precisely established the fragmentation patterns of the tested series of neoglycolipid cholesteryl derivatives and authenticated their structure as well; moreover, we speculated on the formation of a C-glycoside with the ESI source under atmospheric pressure and in the collision cell during MS/MS analysis.
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Affiliation(s)
- Anas El-Aneed
- Biochemistry Department, Memorial University of Newfoundland, St. John's, Newfoundland, Canada
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Affiliation(s)
- Dominique Lafont
- a Fakultät Chemie, Universität Konstanz , Postfach 556O, D-7750 , Konstanz , Germany
- b Laboratoire de Chimie Organique 2 , Université Claude-Bernard Lyon 1 , E. S. C. I. L., 43, Boulevard du 11-Novembre-1918, 69622 , Villeurbanne Cedex , France
| | - Monika Hoch
- a Fakultät Chemie, Universität Konstanz , Postfach 556O, D-7750 , Konstanz , Germany
| | - Richard R. Schmidt
- a Fakultät Chemie, Universität Konstanz , Postfach 556O, D-7750 , Konstanz , Germany
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Lafont D, Boullanger P, Fenet B. Reacttvite Comparee de Divers Accepteurs de la d-Glucosamine lors de la Synthese de Precurseurs du Chitobiose. J Carbohydr Chem 2006. [DOI: 10.1080/07328309408011665] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Dominique Lafont
- a Laboratoire de Chimie Organique II , URA CNRS 463 Université Lyon I , CPE Lyon, 43 Bd du 11 Novembre 1918 F-69622, Villeurbanne Cedex, France
| | - Paul Boullanger
- a Laboratoire de Chimie Organique II , URA CNRS 463 Université Lyon I , CPE Lyon, 43 Bd du 11 Novembre 1918 F-69622, Villeurbanne Cedex, France
| | - Bernard Fenet
- b Centre Commun de Résonance Magnétique Nucléaire Université Lyon I , B[acaron]t 721, 43 Bd du 11 Novembre 1918 F-69622, Villeurbanne Cedex, France
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Lafont D, Carrière F, Ferrato F, Boullanger P. Syntheses of an α-d-Gal-(1→6)-β-d-Gal diglyceride, as lipase substrate. Carbohydr Res 2006; 341:695-704. [PMID: 16458274 DOI: 10.1016/j.carres.2006.01.021] [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] [Received: 12/21/2005] [Revised: 01/16/2006] [Accepted: 01/17/2006] [Indexed: 11/23/2022]
Abstract
Two different routes were explored to afford 3-O-(6-O-alpha-D-galactopyranosyl-beta-D-galactopyranosyl)-1,2-di-O-dodecanoyl-sn-glycerol. In the first one, the key step was the glycosylation of the 3-O-(2,3,4-tri-O-benzyl-beta-D-galactopyranosyl)-1,2-O-isopropylidene-sn-glycerol acceptor with 2-pyridyl 2,3,4,6-tetra-O-benzyl-1-thio-beta-D-galactopyranoside as the donor. In the second one, the key step was the coupling of 2,3,4-tri-O-acetyl-6-O-(2,3,4,6-tetra-O-benzyl-alpha-D-galactopyranosyl)-D-galactopyranosyl trichloroacetimidate donor with 1,2-O-isopropylidene-sn-glycerol. Even though the number of steps was the same in both pathways, the first one afforded a better overall yield (12.4%) than the second one (6.5%). This eight-step synthesis allowed the preparation of the expected glycolipid, which was used as substrate for recombinant GPLRP2 galactolipase using the monomolecular film technique.
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Affiliation(s)
- Dominique Lafont
- Laboratoire de Chimie Organique II, UMR CNRS 5181, Université Lyon 1, Bâtiment 308, 43 Bd du 11 Novembre 1918, F 69622 Villeurbanne, France
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Laurent N, Lafont D, Boullanger P. Syntheses of α-d-galactosamine neoglycolipids. Carbohydr Res 2006; 341:823-35. [PMID: 16516175 DOI: 10.1016/j.carres.2006.02.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [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: 12/28/2005] [Revised: 02/16/2006] [Accepted: 02/17/2006] [Indexed: 11/22/2022]
Abstract
Several N-acetyl-alpha-d-galactosamine neoglycolipids, as well as hydrophobized T and T(N) antigen analogues, were prepared for embedment onto liposomes. Three different lipidic structures were used for the anchoring, that is cholesterol, 1,3-bis(undecyloxy)propan-2-ol and 1,3-bis(3,7,11,15-tetramethylhexadecyloxy)propan-2-ol. Oligoethyleneglycol spacers were used to link the carbohydrate and the hydrophobic moieties; their lengths were varied in order to obtain model compounds for the selective recognition by sialyl transferases involved in cancer processes. Glycosylation reactions were optimized to sluggish amphiphilic acceptor alcohols, in order to reach good 1,2-cis-stereoselectivities and acceptable yields. This aim was achieved by using 3,4,6-tri-O-acetyl-2-azido-2-deoxy-d-galactopyranosyl trichloroacetimidate as the donor, trimethylsilyl trifluoromethanesulfonate as the promoter and diethyl ether or mixtures of diethyl ether and dichloromethane as solvents.
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Affiliation(s)
- Nicolas Laurent
- Laboratoire de Chimie Organique II-Glycochimie, Unité Mixte de Recherche UCBL-CNRS 5181, Université Lyon 1, Ecole Supérieure de Chimie Physique Electronique de Lyon, 43 Bd du 11 Novembre 1918, F-69622 Villeurbanne, France
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Laurent N, Lafont D, Boullanger P, Mallet JM. An alternative high yielding and highly stereoselective method for preparing an α-Neu5NAc-(2,6)-d-GalN3 building block suitable for further glycosylation. Carbohydr Res 2005; 340:1885-92. [PMID: 15963962 DOI: 10.1016/j.carres.2005.05.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [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: 04/28/2005] [Revised: 05/25/2005] [Accepted: 05/26/2005] [Indexed: 11/22/2022]
Abstract
This paper deals with new approaches to alpha-Neu5NAc-(2,6)-D-GalN3 building blocks, suitable as glycosylation donors. The major improvement, by comparison with the results of the literature, lies in the glycosylation step of a new d-galactosamine acceptor (tert-butyldimethylsilyl 3-O-acetyl-2-azido-2-deoxy-beta-D-galactopyranoside) with O-methyl-S-[methyl(5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-alpha-D-galacto-non-2-ulopyranosyl)onate] dithiocarbonate as the N-acetylneuraminic acid donor. The reaction affords the expected disaccharide in high yield (85%) and a complete alpha-Neu5NAc stereoselectivity. A subsequent oxidation step, eliminating the glycal by-product allows an easier purification. Afterwards, the tert-butyldimethylsilyl disaccharide can be transformed into a donor, after cleavage of the anomeric group in smooth conditions.
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Affiliation(s)
- Nicolas Laurent
- Laboratoire de Chimie Organique II-Glycochimie, Unité Mixte de Recherche CNRS 5181, Université Lyon 1, Chimie Physique Electronique de Lyon, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France
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Banoub J, Boullanger P, Lafont D, Cohen A, El Aneed A, Rowlands E. In situ formation of C-glycosides during electrospray ionization tandem mass spectrometry of a series of synthetic amphiphilic cholesteryl polyethoxy neoglycolipids containing N-acetyl-D-glucosamine. J Am Soc Mass Spectrom 2005; 16:565-570. [PMID: 15792726 DOI: 10.1016/j.jasms.2005.01.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2004] [Revised: 01/05/2005] [Accepted: 01/06/2005] [Indexed: 05/24/2023]
Abstract
In this communication, the structural analysis of six synthetic O-Linked amphiphilic cholesteryl polyethoxy neoglycolipids containing N-acetyl-D-glucosamine was performed by electrospray ionization mass spectrometry in the positive ion mode, with a QqTOF-MS/MS hybrid instrument. The MS/MS analyses provided evidence for the "in situ" formation, in the collision cell of the tandem mass spectrometer, of an unexpected and unique [C-glycoside]+ product ion, resulting from an ion-molecule reaction between the N-acetyl-D-glucosamine oxonium ion and the neutral cholesta-3,5-diene molecule. Quasi MS3 analysis of this ion resulted in the dissociation of the precursor [C-glycoside]+ ion, which produced the expected third generation N-acetyl-D-glucosamine oxonium and the protonated cholesta-3,5-diene product ions.
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Affiliation(s)
- Joseph Banoub
- Department of Fisheries and Oceans, St. John's, Newfoundland, Canada.
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Sias B, Ferrato F, Grandval P, Lafont D, Boullanger P, De Caro A, Leboeuf B, Verger R, Carrière F. Human pancreatic lipase-related protein 2 is a galactolipase. Biochemistry 2004; 43:10138-48. [PMID: 15287741 DOI: 10.1021/bi049818d] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [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: 11/30/2022]
Abstract
Human pancreatic lipase-related protein 2 (HPLRP2) was found to be expressed in the pancreas, but its biochemical properties were not investigated in detail. A recombinant HPLRP2 was produced in insect cells and the yeast Pichia pastoris and purified by cation exchange chromatography. Its substrate specificity was investigated using pH-stat and monomolecular film techniques and various lipid substrates (triglycerides, diglycerides, phospholipids, and galactolipids). Lipase activity of HPLRP2 on trioctanoin was inhibited by bile salts and poorly restored by adding colipase. In vivo, HPLRP2 therefore seems unlikely to show any lipase activity on dietary fat. In human pancreatic lipase (HPL), residues R256, D257, Y267, and K268 are involved in the stabilization of the open conformation of the lid domain, which interacts with colipase. These residues are not conserved in HPLRP2. When the corresponding mutations (R256G, D257G, Y267F, and K268E) are introduced into HPL, the effects of colipase are drastically reduced in the presence of bile salts. This may explain why colipase has such weak effects on HPLRP2. HPLRP2 displayed a very low level of activity on phospholipid micelles and monomolecular films. Its activity on monogalactosyldiglyceride monomolecular film, which was much higher, was similar to the activity of guinea pig pancreatic lipase related-protein 2, which shows the highest galactolipase activity ever measured. The physiological role of HPLRP2 suggested by the present results is the digestion of galactolipids, the most abundant lipids occurring in plant cells, and therefore, in the vegetables that are part of the human diet.
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Affiliation(s)
- Barbara Sias
- Laboratoire d'Enzymologie Interfaciale et de Physiologie de la Lipolyse, CNRS UPR 9025, IBSM, Marseille, France
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Martin P, Lequart V, Cecchelli R, Boullanger P, Lafont D, Banoub J. Novel Synthesis of Disaccharides Containing the 2-Amino-2-deoxy-β-D-glucopyranosyl Unit and L-Glycero-D-Manno- and 7-Deoxy-L-Glycero-D-Galacto-heptopyranoses. CHEM LETT 2004. [DOI: 10.1246/cl.2004.696] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Laurent N, Lafont D, Dumoulin F, Boullanger P, Mackenzie G, Kouwer PHJ, Goodby JW. Synthesis of Amphiphilic Phenylazophenyl Glycosides and a Study of Their Liquid Crystal Properties. J Am Chem Soc 2003; 125:15499-506. [PMID: 14664596 DOI: 10.1021/ja037347x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [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: 11/28/2022]
Abstract
Several 4-(4'-N,N-didodecylaminophenylazo)phenyl 1,2-trans glycosides 5a-e with various carbohydrate heads (beta-D-gluco, beta-D-galacto, beta-lacto, beta-D-xylo, and alpha-D-manno) have been synthesized. The key step was the formation of phenyldiazonium tetrafluoroborates 2a-e from the per-O-acetylated 4-aminophenyl glycosides 1a-e. These salts were condensed with N,N-didodecylaniline under phase transfer conditions and the per-O-acetylated 4-(4'-N,N-didodecylaminophenylazo)phenyl 1,2-trans glycosides 4a-e were fully de-O-acetylated by the Zemplén method. The self-organizing liquid crystal properties of the compounds were investigated by a variety of techniques, including polarized light microscopy, differential scanning calorimetry, and X-ray diffraction. All but one of the materials exhibited smectic A, lamellar phases. Remarkably, the glucose derivative exhibited a rectangular disordered columnar phase. This result has implications with respect to the induced curvature created by the recognition processes of the glucose headgroup relative to the other sugar moieties and to the prevalence of various glycolipids in cell membranes
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Affiliation(s)
- Nicolas Laurent
- Laboratoire de Chimie Organique II, Unité Mixte de Recherche CNRS 5181, Université Lyon 1, Chimie Physique Electronique de Lyon, 43 Bd du 11 Novembre 1918, F 69622 Villeurbanne, France
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Dumoulin F, Lafont D, Boullanger P, Mackenzie G, Mehl GH, Goodby JW. Self-organizing properties of natural and related synthetic glycolipids. J Am Chem Soc 2002; 124:13737-48. [PMID: 12431104 DOI: 10.1021/ja020396+] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [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: 11/28/2022]
Abstract
In this article we report on the syntheses, self-organizing properties, and structures of a variety of cerebrosides and related synthetic glycolipids. The thermotropic and lyotropic liquid crystalline properties of the materials were evaluated in detail. All of the families of materials studied exhibited columnar mesophases. In the dry state the aliphatic chains were found to be located on the exterior of the columns, whereas in the wet state the reverse was the case with the polar headgroups on the exterior. Thus, the aliphatic chains act almost like hydrocarbon solvents in the dry state.
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Affiliation(s)
- Fabienne Dumoulin
- Universite Lyon 1, Chimie Physique Electronique de Lyon, 43 Bd du11 Novembre 1918, F-69622 Villeurbanne, France
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Abstract
Four glycosyl ceramides analogues having D-galactose or 2-acetamido-2-deoxy-D-glucose moieties linked to enantiomeric lipids have been synthesised to study their interfacial behaviour at the air/water interface. The lipid chains were prepared in two steps by opening 1,2-epoxyhexadecane using Jacobsen kinetic hydrolytic resolution (KHR) followed by an azidosilylation reaction of the diol so obtained. Glycosylation reactions were realised either with 2,3,4,6-tetra-O-benzoyl-alpha-D-galactopyranosyl trichloroacetimidate or 1,3,4,6-tetra-O-acetyl-2-allyloxycarbonylamino-2-deoxy-beta-D-glucopyranose as donors and (2R)- or (2S)-2-azidohexadecanol derivatives as acceptors. Transformation of the azido glycosides into N-acylated products was done by a modified Staudinger reaction in the presence of fatty acyl chlorides. The four neoglycolipids are able to form a condensed monolayer at the air/water interface; their pi-A isotherm diagrams are similar to that described for the natural glycosyl ceramides. The detailed analysis of the isotherms, taking into account the chirality of the lipid chains, allowed to determine the contribution of the different parts of the molecule under the monolayer packing.
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Affiliation(s)
- D Lafont
- Laboratoire de Chimie Organique II, Unité Mixte de Recherche CNRS 5622, Université Lyon 1, Chimie Physique Electronique de Lyon, 43 Boulevard du 11 Novembre 1918, F-69622 Villeurbanne, France
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Lafont D, Gross B, Kleinegesse R, Dumoulin F, Boullanger P. Syntheses of neoglycolipids with hexitol spacers between the saccharidic and the lipidic parts. Carbohydr Res 2001; 331:107-17. [PMID: 11322725 DOI: 10.1016/s0008-6215(01)00019-2] [Citation(s) in RCA: 15] [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
Four neoglycolipids having 2-amino-2-deoxy-D-glucose or D-galactose moieties linked to the lipidic part by a glucitol or a mannitol spacer-arm have been synthesized. The key step of the synthetic strategy was the regiospecific or regioselective beta-glycosylation of partially protected glucitol or mannitol acceptors by either 3,4,6-tri-O-acetyl-2-deoxy-2-iodo-alpha-D-mannopyranosyl azide or 2,3,4,6-tetra-O-benzoyl-alpha-D-galactopyranosyl trichloroacetimidate donors.
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Affiliation(s)
- D Lafont
- Laboratoire de Chimie Organique II, Unité Mixte de Recherche CNRS 5622, Université Lyon 1, Chimie Phyisique Electronique de Lyon, Villeurbanne, France.
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Abstract
Protected glycosyl azides react with acyl chlorides in the presence of triphenylphosphine to afford glycosylamides in high yields, at room temperature. Starting from the beta-glycosyl azides, the reaction is highly stereoselective and occurs with retention of configuration, whereas the alpha-azido anomers display a lower stereoselectivity giving rise to alpha/beta mixtures of glycosylamides. The reaction was applied to several monosaccharidic azides and to lactosyl azide with various acyl chlorides; it was shown to be of general use for preparing 1,2-trans beta-glycosylamides.
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Affiliation(s)
- P Boullanger
- Laboratoire de Chimie Organique II, Unité Mixte de Recherche CNRS 5622, Université de Lyon 1, Chimie Physique Electronique de Lyon, Villeurbanne, France.
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Lafont D, Boullanger P, Rosenzweig M. Iodoacetoxylation Reaction: A Convenient Route to α-Glycosides in the 2-Iodo and 2-Deoxy Series. J Carbohydr Chem 1998. [DOI: 10.1080/07328309808002360] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Gelhausen M, Besson F, Chierici S, Lafont D, Boullanger P, Roux B. Lectin recognition of liposomes containing neoglycolipids. Influence of their lipidic anchor and spacer length. Colloids Surf B Biointerfaces 1998. [DOI: 10.1016/s0927-7765(98)00009-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Maunier V, Boullanger P, Lafont D, Chevalier Y. Synthesis and surface-active properties of amphiphilic 6-aminocarbonyl derivatives of d-glucose. Carbohydr Res 1997. [DOI: 10.1016/s0008-6215(96)00336-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Maunier V, Boullanger P, Lafont D. A One-Pot Synthesis of Glycosyl Amides from Glycosyl Azides Using a Modified Staudinger Reaction. J Carbohydr Chem 1997. [DOI: 10.1080/07328309708006523] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Boullanger P, Chevalier Y, Croizier MC, Lafont D, Sancho MR. Synthesis and surface-active properties of some alkyl 2-amino-2-deoxy-β-d-glucopyranosides. Carbohydr Res 1995. [DOI: 10.1016/0008-6215(95)00229-1] [Citation(s) in RCA: 16] [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: 10/27/2022]
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