1
|
Wei X, Wang P, Liu F, Ye X, Xiong D. Drug Discovery Based on Fluorine-Containing Glycomimetics. Molecules 2023; 28:6641. [PMID: 37764416 PMCID: PMC10536126 DOI: 10.3390/molecules28186641] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
Glycomimetics, which are synthetic molecules designed to mimic the structures and functions of natural carbohydrates, have been developed to overcome the limitations associated with natural carbohydrates. The fluorination of carbohydrates has emerged as a promising solution to dramatically enhance the metabolic stability, bioavailability, and protein-binding affinity of natural carbohydrates. In this review, the fluorination methods used to prepare the fluorinated carbohydrates, the effects of fluorination on the physical, chemical, and biological characteristics of natural sugars, and the biological activities of fluorinated sugars are presented.
Collapse
Affiliation(s)
- Xingxing Wei
- Department of Pharmacy, Changzhi Medical College, No. 161, Jiefang East Street, Changzhi 046012, China
| | - Pengyu Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. No. 38, Beijing 100191, China (F.L.); (X.Y.)
| | - Fen Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. No. 38, Beijing 100191, China (F.L.); (X.Y.)
| | - Xinshan Ye
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. No. 38, Beijing 100191, China (F.L.); (X.Y.)
| | - Decai Xiong
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Rd. No. 38, Beijing 100191, China (F.L.); (X.Y.)
| |
Collapse
|
2
|
Romanò C, Bengtsson D, Infantino AS, Oscarson S. Synthesis of fluoro- and seleno-containing D-lactose and D-galactose analogues. Org Biomol Chem 2023; 21:2545-2555. [PMID: 36877217 DOI: 10.1039/d2ob02299k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Synthetic deoxy-fluoro-carbohydrate derivatives and seleno-sugars are useful tools in protein-carbohydrate interaction studies using nuclear magnetic resonance spectroscopy because of the presence of the 19F and 77Se reporter nuclei. Seven saccharides containing both these atoms have been synthesized, three monosaccharides, methyl 6-deoxy-6-fluoro-1-seleno-β-D-galactopyranoside (1) and methyl 2-deoxy-2-fluoro-1-seleno-α/β-D-galactopyranoside (2α and 2β), and four disaccharides, methyl 4-O-(β-D-galactopyranosyl)-2-deoxy-2-fluoro-1-seleno-β-D-glucopyranoside (3), methyl 4-Se-(β-D-galactopyranosyl)-2-deoxy-2-fluoro-4-seleno-β-D-glucopyranoside (4), and methyl 4-Se-(2-deoxy-2-fluoro-α/β-D-galactopyranosyl)-4-seleno-β-D-glucopyranoside (5α and 5β), the three latter compounds with an interglycosidic selenium atom. Selenoglycosides 1 and 3 were obtained from the corresponding bromo sugar by treatment with dimethyl selenide and a reducing agent, while compounds 2α/2β, 4, and 5α/5β were synthesized by the coupling of a D-galactosyl selenolate, obtained in situ from the corresponding isoselenouronium salt, with either methyl iodide or a 4-O-trifluoromethanesulfonyl D-galactosyl moiety. While benzyl ether protecting groups were found to be incompatible with the selenide linkage during deprotection, a change to acetyl esters afforded 4 in a 17% overall yield and over 9 steps from peracetylated D-galactosyl bromide. The synthesis of 5 was performed similarly, but the 2-fluoro substituent led to reduced stereoselectivity in the formation of the isoselenouronium salt (α/β ∼ 1 : 2.3). However, the β-anomer of the uronium salt could be obtained almost pure (∼98%) by precipitation from the reaction mixture. The following displacement reaction occurred without anomerisation, affording, after deacetylation, pure 5β.
Collapse
Affiliation(s)
- Cecilia Romanò
- Centre for Synthesis and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Dennis Bengtsson
- Centre for Synthesis and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Angela Simona Infantino
- Centre for Synthesis and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Stefan Oscarson
- Centre for Synthesis and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland.
| |
Collapse
|
3
|
Teschers CS, Gilmour R. Fluorine-Directed Automated Mannoside Assembly. Angew Chem Int Ed Engl 2023; 62:e202213304. [PMID: 36331042 PMCID: PMC10108063 DOI: 10.1002/anie.202213304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 11/02/2022] [Accepted: 11/04/2022] [Indexed: 11/06/2022]
Abstract
Automated glycan assembly (AGA) on solid support has become invaluable in reconciling the biological importance of complex carbohydrates with the persistent challenges associated with reproducible synthesis. Whilst AGA platforms have transformed the construction of many natural sugars, validation in the construction of well-defined (site-selectively modified) glycomimetics is in its infancy. Motivated by the importance of fluorination in drug discovery, the biomedical prominence of 2-fluoro sugars and the remarkable selectivities observed in fluorine-directed glycosylation, fluorine-directed automated glycan assembly (FDAGA) is disclosed. This strategy leverages the fluorine atom for stereocontrolled glycosylation on solid support, thereby eliminating the reliance on O-based directing groups. The logical design of C2-fluorinated mannose building blocks, and their application in the fully (α-)stereocontrolled automated assembly of linear and branched fluorinated oligomannosides, is disclosed. This operationally simple strategy can be integrated into existing AGA and post-AGA protocols to augment the scope of programmed carbohydrate synthesis.
Collapse
Affiliation(s)
- Charlotte S Teschers
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstr. 36, 48149, Münster, Germany
| | - Ryan Gilmour
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstr. 36, 48149, Münster, Germany
| |
Collapse
|
4
|
Abstract
![]()
Fluorinated
carbohydrates have found many applications in the glycosciences.
Typically, these contain fluorination at a single position. There
are not many applications involving polyfluorinated carbohydrates,
here defined as monosaccharides in which more than one carbon has
at least one fluorine substituent directly attached to it, with the
notable exception of their use as mechanism-based inhibitors. The
increasing attention to carbohydrate physical properties, especially
around lipophilicity, has resulted in a surge of interest for this
class of compounds. This review covers the considerable body of work
toward the synthesis of polyfluorinated hexoses, pentoses, ketosugars,
and aminosugars including sialic acids and nucleosides. An overview
of the current state of the art of their glycosidation is also provided.
Collapse
Affiliation(s)
- Kler Huonnic
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - Bruno Linclau
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K.,Department of Organic and Macromolecular Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-S4, Ghent, 9000, Belgium
| |
Collapse
|
5
|
Johnson SE, Galan MC. Synthesis of 2-deoxy mucin-type O-glycan analogues as biological probes. Carbohydr Res 2022; 514:108542. [DOI: 10.1016/j.carres.2022.108542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/07/2022] [Accepted: 03/07/2022] [Indexed: 12/12/2022]
|
6
|
Kurfiřt M, Dračínský M, Červenková Šťastná L, Cuřínová P, Hamala V, Hovorková M, Bojarová P, Karban J. Selectively Deoxyfluorinated N-Acetyllactosamine Analogues as 19 F NMR Probes to Study Carbohydrate-Galectin Interactions. Chemistry 2021; 27:13040-13051. [PMID: 34216419 DOI: 10.1002/chem.202101752] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Indexed: 01/12/2023]
Abstract
Galectins are widely expressed galactose-binding lectins implied, for example, in immune regulation, metastatic spreading, and pathogen recognition. N-Acetyllactosamine (Galβ1-4GlcNAc, LacNAc) and its oligomeric or glycosylated forms are natural ligands of galectins. To probe substrate specificity and binding mode of galectins, we synthesized a complete series of six mono-deoxyfluorinated analogues of LacNAc, in which each hydroxyl has been selectively replaced by fluorine while the anomeric position has been protected as methyl β-glycoside. Initial evaluation of their binding to human galectin-1 and -3 by ELISA and 19 F NMR T2 -filter revealed that deoxyfluorination at C3, C4' and C6' completely abolished binding to galectin-1 but very weak binding to galectin-3 was still detectable. Moreover, deoxyfluorination of C2' caused an approximately 8-fold increase in the binding affinity towards galectin-1, whereas binding to galectin-3 was essentially not affected. Lipophilicity measurement revealed that deoxyfluorination at the Gal moiety affects log P very differently compared to deoxyfluorination at the GlcNAc moiety.
Collapse
Affiliation(s)
- Martin Kurfiřt
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 135, 16502, Prague 6, Czech Republic.,University of Chemistry and Technology Prague, Technická 5, 16628, Prague 6, Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 542/2, 160 00, Prague 6, Czech Republic
| | - Lucie Červenková Šťastná
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 135, 16502, Prague 6, Czech Republic
| | - Petra Cuřínová
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 135, 16502, Prague 6, Czech Republic
| | - Vojtěch Hamala
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 135, 16502, Prague 6, Czech Republic.,University of Chemistry and Technology Prague, Technická 5, 16628, Prague 6, Czech Republic
| | - Michaela Hovorková
- Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague, Czech Republic
| | - Pavla Bojarová
- Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague, Czech Republic
| | - Jindřich Karban
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, Rozvojová 135, 16502, Prague 6, Czech Republic
| |
Collapse
|
7
|
Nolen EG, Hornik ES, Jeans KB, Zhong W, LaPaglia DM. Synthesis of C-linked α-Gal and α-GalNAc-1'-hydroxyalkanes by way of C2 functionality transfer. Tetrahedron Lett 2021; 73. [PMID: 34393282 DOI: 10.1016/j.tetlet.2021.153109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Inspired by reports of water sculpted Tn antigen (α-GalNAc-O-Ser/Thr) epitopes and our interest in producing metabolically more stable C-linked analogs of Tn, we explored the utility of C2 functionality on α-Gal-C-alkenes to deliver hydroxyl to the pendant alkenyl chain. Toward this end, a cyclic carbonate approach gave rise to a single C-linked α-Gal-1'(S)-hydroxyethane in 3 steps, and use of a 2-(hydroxyimino)galactoside cyclization transferred an oxygen to a pendant cis-substituted C-linked alkene affording the R-configuration at the newly formed stereocenter (7:1 dr). Reduction and acetylation of the resultant isoxazoline demonstrated this approach as a viable route to C-linked α-GalNAc-1'-hydroxyalkanes.
Collapse
Affiliation(s)
- Ernest G Nolen
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, NY 13346, USA
| | - Ezra S Hornik
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, NY 13346, USA
| | - Kendra B Jeans
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, NY 13346, USA
| | - Weiyu Zhong
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, NY 13346, USA
| | - Danielle M LaPaglia
- Department of Chemistry, Colgate University, 13 Oak Drive, Hamilton, NY 13346, USA
| |
Collapse
|
8
|
Wheatley DE, Fontenelle CQ, Kuppala R, Szpera R, Briggs EL, Vendeville JB, Wells NJ, Light ME, Linclau B. Synthesis and Structural Characteristics of all Mono- and Difluorinated 4,6-Dideoxy-d- xylo-hexopyranoses. J Org Chem 2021; 86:7725-7756. [PMID: 34029099 DOI: 10.1021/acs.joc.1c00796] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Protein-carbohydrate interactions are implicated in many biochemical/biological processes that are fundamental to life and to human health. Fluorinated carbohydrate analogues play an important role in the study of these interactions and find application as probes in chemical biology and as drugs/diagnostics in medicine. The availability and/or efficient synthesis of a wide variety of fluorinated carbohydrates is thus of great interest. Here, we report a detailed study on the synthesis of monosaccharides in which the hydroxy groups at their 4- and 6-positions are replaced by all possible mono- and difluorinated motifs. Minimization of protecting group use was a key aim. It was found that introducing electronegative substituents, either as protecting groups or as deoxygenation intermediates, was generally beneficial for increasing deoxyfluorination yields. A detailed structural study of this set of analogues demonstrated that dideoxygenation/fluorination at the 4,6-positions caused very little distortion both in the solid state and in aqueous solution. Unexpected trends in α/β anomeric ratios were identified. Increasing fluorine content always increased the α/β ratio, with very little difference between regio- or stereoisomers, except when 4,6-difluorinated.
Collapse
Affiliation(s)
- David E Wheatley
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Clement Q Fontenelle
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Ramakrishna Kuppala
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Robert Szpera
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Edward L Briggs
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | | | - Neil J Wells
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Mark E Light
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Bruno Linclau
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| |
Collapse
|
9
|
Hamala V, Červenková Šťastná L, Kurfiřt M, Cuřínová P, Dračínský M, Karban J. Synthesis of multiply fluorinated N-acetyl-D-glucosamine and D-galactosamine analogs via the corresponding deoxyfluorinated glucosazide and galactosazide phenyl thioglycosides. Beilstein J Org Chem 2021; 17:1086-1095. [PMID: 34093878 PMCID: PMC8144920 DOI: 10.3762/bjoc.17.85] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 04/27/2021] [Indexed: 11/23/2022] Open
Abstract
Multiple fluorination of glycostructures has emerged as an attractive way of modulating their protein affinity, metabolic stability, and lipophilicity. Here we described the synthesis of a series of mono-, di- and trifluorinated N-acetyl-ᴅ-glucosamine and ᴅ-galactosamine analogs. The key intermediates are the corresponding multiply fluorinated glucosazide and galactosazide thioglycosides prepared from deoxyfluorinated 1,6-anhydro-2-azido-β-ᴅ-hexopyranose precursors by ring-opening reaction with phenyl trimethylsilyl sulfide. Nucleophilic deoxyfluorination at C4 and C6 by reaction with DAST, thioglycoside hydrolysis and azide/acetamide transformation completed the synthesis.
Collapse
Affiliation(s)
- Vojtěch Hamala
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
- University of Chemistry and Technology Prague, Technická 5, 16628 Praha 6, Czech Republic
| | - Lucie Červenková Šťastná
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
| | - Martin Kurfiřt
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
- University of Chemistry and Technology Prague, Technická 5, 16628 Praha 6, Czech Republic
| | - Petra Cuřínová
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
| | - Martin Dračínský
- NMR Spectroscopy group, Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo náměstí 542/2, 16000 Praha, Czech Republic
| | - Jindřich Karban
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
| |
Collapse
|
10
|
Wu X, McFall-Boegeman H, Rashidijahanabad Z, Liu K, Pett C, Yu J, Schorlemer M, Ramadan S, Behren S, Westerlind U, Huang X. Synthesis and immunological evaluation of the unnatural β-linked mucin-1 Thomsen-Friedenreich conjugate. Org Biomol Chem 2021; 19:2448-2455. [PMID: 33645601 PMCID: PMC8011953 DOI: 10.1039/d1ob00007a] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
MUC1 glycopeptides are attractive antigens for anti-cancer vaccine development. One potential drawback in using the native MUC1 glycopeptide for vaccine design is the instability of the O-glycosyl linkage between the glycan and the peptide backbone to glycosidase. To overcome this challenge, a MUC1 glycopeptide mimic has been synthesized with the galactose-galactosamine disaccharide linked with threonine (Thomsen-Friedenreich or Tf antigen) through an unnatural β-glycosyl bond. The resulting MUC1-β-Tf had a much-enhanced stability toward a glycosidase capable of cleaving the glycan from the corresponding MUC1 glycopeptide with the natural α-Tf linkage. The MUC1-β-Tf was subsequently conjugated with a powerful carrier bacteriophage Qβ. The conjugate induced high levels of IgG antibodies in clinically relevant human MUC1 transgenic mice, which cross-recognized not only the natural MUC1-α-Tf glycopeptide but also MUC1 expressing tumor cells, supporting the notion that a simple switch of the stereochemistry of the glycan/peptide linkage can be a strategy for anti-cancer vaccine epitope design for glycopeptides.
Collapse
Affiliation(s)
- Xuanjun Wu
- National Glycoengineering Research Center, Shandong University, Qingdao, Shandong 266237, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Kurfiřt M, Lucie ČŠ, Cuřínová P, Hamala V, Karban J. Development of α-Selective Glycosylation for the Synthesis of Deoxyfluorinated TN Antigen Analogues. J Org Chem 2021; 86:5073-5090. [DOI: 10.1021/acs.joc.0c03015] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Martin Kurfiřt
- Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
- University of Chemistry and Technology Prague, Technická 5, 16628 Praha 6, Czech Republic
| | - Červenková Št’astná Lucie
- Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
| | - Petra Cuřínová
- Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
| | - Vojtěch Hamala
- Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
- University of Chemistry and Technology Prague, Technická 5, 16628 Praha 6, Czech Republic
| | - Jindřich Karban
- Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
| |
Collapse
|
12
|
Linclau B, Ardá A, Reichardt NC, Sollogoub M, Unione L, Vincent SP, Jiménez-Barbero J. Fluorinated carbohydrates as chemical probes for molecular recognition studies. Current status and perspectives. Chem Soc Rev 2021; 49:3863-3888. [PMID: 32520059 DOI: 10.1039/c9cs00099b] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review provides an extensive summary of the effects of carbohydrate fluorination with regard to changes in physical, chemical and biological properties with respect to regular saccharides. The specific structural, conformational, stability, reactivity and interaction features of fluorinated sugars are described, as well as their applications as probes and in chemical biology.
Collapse
Affiliation(s)
- Bruno Linclau
- School of Chemistry, University of Southampton, Highfield, Southampton SO171BJ, UK
| | - Ana Ardá
- CIC bioGUNE, Basque Research and Technology Alliance (BRTA), 48160 Derio, Spain.
| | | | - Matthieu Sollogoub
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, UMR 8232, 4 place Jussieu, 75005 Paris, France
| | - Luca Unione
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Stéphane P Vincent
- Department of Chemistry, Laboratory of Bio-organic Chemistry, University of Namur (UNamur), B-5000 Namur, Belgium
| | - Jesús Jiménez-Barbero
- CIC bioGUNE, Basque Research and Technology Alliance (BRTA), 48160 Derio, Spain. and Ikerbasque, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain and Department of Organic Chemistry II, Faculty of Science and Technology, UPV/EHU, 48940 Leioa, Spain
| |
Collapse
|
13
|
Hevey R. The Role of Fluorine in Glycomimetic Drug Design. Chemistry 2020; 27:2240-2253. [DOI: 10.1002/chem.202003135] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Rachel Hevey
- Department of Pharmaceutical Sciences University of Basel, Pharmazentrum Klingelbergstrasse 50 4056 Basel Switzerland
| |
Collapse
|
14
|
Li T, Zhang H, Guo Y, Zhu T, Yu P, Meng X. Efficient chemoenzymatic synthesis of fluorinated sialyl Thomsen-Friedenreich antigens and investigation of their characteristics. Eur J Med Chem 2020; 208:112776. [PMID: 32896759 DOI: 10.1016/j.ejmech.2020.112776] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 08/17/2020] [Accepted: 08/19/2020] [Indexed: 02/06/2023]
Abstract
A set of fluorinated sialyl-T derivatives were efficiently synthesized using one-pot multi-enzyme (OPME) chemoenzymatic approach. The P. multocida α2-3-sialyltransferase (PmST1) involved in the synthesis showed extremely flexible donor and acceptor substrate specificities. These sialosides have been successfully investigated with stability towards Clostridium perfringens sialidase substrate specificity assay using 1H NMR spectroscopy. Hydrolysis studies monitored by 1H NMR clearly demonstrated that the fluorine substitution obviously reduced hydrolysis rate of Clostridium perfringens sialidase. To further investigate the fluorine influence, structure-dependent variation of sialoside-lectin binding was observed for MAL and different sialoside-immobilized surfaces. Subtle changes on the ligand of carbohydrate-binding protein were distinguished by SPR. These fluorinated sialyl-T derivatives obtained are valuable probes for further biological studies or antitumor drug design.
Collapse
Affiliation(s)
- Tingshen Li
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry, Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Huiming Zhang
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry, Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Ying Guo
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry, Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Tao Zhu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry, Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China; CanSino Biologics Inc., Tianjin Enterprise Key Laboratory of Respiratory Bacterial Recombination and Conjugated Vaccine, Tianjin, 300457, China
| | - Peng Yu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry, Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Xin Meng
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Sino-French Joint Lab of Food Nutrition/Safety and Medicinal Chemistry, Key Laboratory of Industrial Fermentation Microbiology of Ministry of Education, Tianjin Key Laboratory of Industry Microbiology, College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, China.
| |
Collapse
|
15
|
Franconetti A, López Ó, Fernandez-Bolanos JG. Carbohydrates: Potential Sweet Tools Against Cancer. Curr Med Chem 2020; 27:1206-1242. [DOI: 10.2174/0929867325666180719114150] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 04/25/2018] [Accepted: 06/28/2018] [Indexed: 12/13/2022]
Abstract
:Cancer, one of the most devastating degenerative diseases nowadays, is one of the main targets in Medicinal Chemistry and Pharmaceutical industry. Due to the significant increase in the incidence of cancer within world population, together with the complexity of such disease, featured with a multifactorial nature, access to new drugs targeting different biological targets connected to cancer is highly necessary.:Among the vast arsenal of compounds exhibiting antitumor activities, this review will cover the use of carbohydrate derivatives as privileged scaffolds. Their hydrophilic nature, together with their capacity of establishing selective interactions with biological receptors located on cell surface, involved in cell-to-cell communication processes, has allowed the development of an ample number of new templates useful in cancer treatment.:Their intrinsic water solubility has allowed their use as of pro-drug carriers for accessing more efficiently the pharmaceutical targets. The preparation of glycoconjugates in which the carbohydrate is tethered to a pharmacophore has also allowed a better permeation of the drug through cellular membranes, in which selective interactions with the carbohydrate motifs are involved. In this context, the design of multivalent structures (e.g. gold nanoparticles) has been demonstrated to enhance crucial interactions with biological receptors like lectins, glycoproteins that can be involved in cancer progression.:Moreover, the modification of the carbohydrate structural motif, by incorporation of metal complexes, or by replacing their endocyclic oxygen, or carbon atoms with heteroatoms has led to new antitumor agents.:Such diversity of sugar-based templates with relevant antitumor activity will be covered in this review.
Collapse
Affiliation(s)
- Antonio Franconetti
- Departamento de Quimica Organica, Facultad de Quimica, Universidad de Sevilla, Sevilla, Spain
| | - Óscar López
- Departamento de Quimica Organica, Facultad de Quimica, Universidad de Sevilla, Sevilla, Spain
| | | |
Collapse
|
16
|
Hevey R. Bioisosteres of Carbohydrate Functional Groups in Glycomimetic Design. Biomimetics (Basel) 2019; 4:E53. [PMID: 31357673 PMCID: PMC6784292 DOI: 10.3390/biomimetics4030053] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 07/25/2019] [Accepted: 07/26/2019] [Indexed: 02/07/2023] Open
Abstract
The aberrant presentation of carbohydrates has been linked to a number of diseases, such as cancer metastasis and immune dysregulation. These altered glycan structures represent a target for novel therapies by modulating their associated interactions with neighboring cells and molecules. Although these interactions are highly specific, native carbohydrates are characterized by very low affinities and inherently poor pharmacokinetic properties. Glycomimetic compounds, which mimic the structure and function of native glycans, have been successful in producing molecules with improved pharmacokinetic (PK) and pharmacodynamic (PD) features. Several strategies have been developed for glycomimetic design such as ligand pre-organization or reducing polar surface area. A related approach to developing glycomimetics relies on the bioisosteric replacement of carbohydrate functional groups. These changes can offer improvements to both binding affinity (e.g., reduced desolvation costs, enhanced metal chelation) and pharmacokinetic parameters (e.g., improved oral bioavailability). Several examples of bioisosteric modifications to carbohydrates have been reported; this review aims to consolidate them and presents different possibilities for enhancing core interactions in glycomimetics.
Collapse
Affiliation(s)
- Rachel Hevey
- Molecular Pharmacy, Department Pharmaceutical Sciences, University of Basel, Klingelbergstr. 50, 4056 Basel, Switzerland.
| |
Collapse
|
17
|
Denavit V, St‐Gelais J, Tremblay T, Giguère D. Exploring the Chemistry of Non‐sticky Sugars: Synthesis of Polyfluorinated Carbohydrate Analogues of
d
‐Allopyranose. Chemistry 2019; 25:9272-9279. [DOI: 10.1002/chem.201901346] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/16/2019] [Indexed: 01/07/2023]
Affiliation(s)
- Vincent Denavit
- Département de Chimie, PROTEO, RQRMUniversité Laval 1045 Avenue de la Médecine Quebec City QC G1V 0A6 Canada
| | - Jacob St‐Gelais
- Département de Chimie, PROTEO, RQRMUniversité Laval 1045 Avenue de la Médecine Quebec City QC G1V 0A6 Canada
| | - Thomas Tremblay
- Département de Chimie, PROTEO, RQRMUniversité Laval 1045 Avenue de la Médecine Quebec City QC G1V 0A6 Canada
| | - Denis Giguère
- Département de Chimie, PROTEO, RQRMUniversité Laval 1045 Avenue de la Médecine Quebec City QC G1V 0A6 Canada
| |
Collapse
|
18
|
Malassis J, Vendeville JB, Nguyen QH, Boujon M, Gaignard-Gaillard Q, Light M, Linclau B. Synthesis of vicinal dideoxy-difluorinated galactoses. Org Biomol Chem 2019; 17:5331-5340. [DOI: 10.1039/c9ob00707e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three novel dideoxydifluorinated galactose derivatives are described.
Collapse
Affiliation(s)
- Julien Malassis
- School of Chemistry
- University of Southampton
- Southampton SO171BJ
- UK
| | | | - Qui-Hien Nguyen
- School of Chemistry
- University of Southampton
- Southampton SO171BJ
- UK
| | - Marie Boujon
- School of Chemistry
- University of Southampton
- Southampton SO171BJ
- UK
| | | | - Mark Light
- School of Chemistry
- University of Southampton
- Southampton SO171BJ
- UK
| | - Bruno Linclau
- School of Chemistry
- University of Southampton
- Southampton SO171BJ
- UK
| |
Collapse
|
19
|
Nativi C, Papi F, Roelens S. Tn antigen analogues: the synthetic way to “upgrade” an attracting tumour associated carbohydrate antigen (TACA). Chem Commun (Camb) 2019; 55:7729-7736. [DOI: 10.1039/c9cc02920f] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Herein, we report various synthetic strategies used to boost the Tn antigen immune response and elicit an effective and long-lasting response.
Collapse
Affiliation(s)
- Cristina Nativi
- Department of Chemistry
- University of Florence
- I-50119 Sesto F. no (FI)
- Italy
| | - Francesco Papi
- Department of Chemistry
- University of Florence
- I-50119 Sesto F. no (FI)
- Italy
| | - Stefano Roelens
- Department of Chemistry and INSTM
- University of Florence
- Polo Scientifico e Tecnologico
- I-50019 Sesto Fiorentino
- Firenze
| |
Collapse
|
20
|
Roudias M, Vallée F, Martel J, Paquin JF. Use of XtalFluor-E as an Alternative to POCl 3 in the Vilsmeier-Haack Formylation of C-2-Glycals. J Org Chem 2018; 83:8731-8738. [PMID: 29989816 DOI: 10.1021/acs.joc.8b01006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We report the use of XtalFluor-E ([Et2NSF2]BF4) as an alternative to POCl3 in the Vilsmeier-Haack formylation reaction of C-2-glycals. Employing a XtalFluor-E/DMF combination allowed the desired C-2-formyl glycals to be isolated in 11-90% yield. This method was extended to the synthesis of a C-2 -formylated disaccharide glycal.
Collapse
Affiliation(s)
- Majdouline Roudias
- CCVC, PROTEO, Département de chimie , Université Laval , 1045 avenue de la Médecine , Québec , QC , Canada G1V 0A6
| | - Frédéric Vallée
- OmegaChem Inc. , 480 rue Perreault , Lévis , QC , Canada G6W 7V6
| | - Julien Martel
- OmegaChem Inc. , 480 rue Perreault , Lévis , QC , Canada G6W 7V6
| | - Jean-François Paquin
- CCVC, PROTEO, Département de chimie , Université Laval , 1045 avenue de la Médecine , Québec , QC , Canada G1V 0A6
| |
Collapse
|
21
|
Baumann A, Marchner S, Daum M, Hoffmann-Röder A. Synthesis of Fluorinated Leishmania
Cap Trisaccharides for Diagnostic Tool and Vaccine Development. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800384] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Andreas Baumann
- Center For Integrated Protein Science Munich (CIPSM) at the Department of Chemistry; Ludwig-Maximilians-Universität; Butenandtstr. 5-13 81377 Munich Germany
| | - Stefan Marchner
- Center For Integrated Protein Science Munich (CIPSM) at the Department of Chemistry; Ludwig-Maximilians-Universität; Butenandtstr. 5-13 81377 Munich Germany
| | - Markus Daum
- Center For Integrated Protein Science Munich (CIPSM) at the Department of Chemistry; Ludwig-Maximilians-Universität; Butenandtstr. 5-13 81377 Munich Germany
| | - Anja Hoffmann-Röder
- Center For Integrated Protein Science Munich (CIPSM) at the Department of Chemistry; Ludwig-Maximilians-Universität; Butenandtstr. 5-13 81377 Munich Germany
| |
Collapse
|
22
|
Siddiqui M, Ambre S, Keay SK, Rhyne JM, Zhang CO, Barchi JJ. Glycoamino Acid Analogues of the Thomsen-Friedenreich Tumor-Associated Carbohydrate Antigen: Synthesis and Evaluation of Novel Antiproliferative Factor Glycopeptides. ACS OMEGA 2017; 2:5618-5632. [PMID: 28983523 PMCID: PMC5623948 DOI: 10.1021/acsomega.7b01018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 08/24/2017] [Indexed: 05/21/2023]
Abstract
Glycoamino acid analogues of the Thomsen-Friedenreich antigen disaccharide, where the 4' and 4″ hydroxyl groups were substituted with fluorine or hydrogen, were synthesized and incorporated into the asialylated antiproliferative factor (as-APF), a biologically active form of APF, a glycopeptide found in the urine of patients with interstitial cystitis. Various strategies were employed to incorporate the fluorine atom at the 4-positions of either the galactose or N-acetylgalactosamine unit of the disaccharide antigen, based on stereochemistry and reactivity. These glycopeptides were evaluated in antiproliferative assays on both primary normal bladder epithelial cells and T24 bladder carcinoma cells. Unlike many previously published substitutions to APF, mono-4'-fluorination of the GalNAc residue did not affect the activity, whereas fluoro-derivatives of the galactose 4″-position or both 4' and 4″ hydroxyls showed a reduced potency relative to the monosubstituted GalNAc derivative. A fourth compound where the 4″ position of galactose was deoxygenated showed a lower potency than the parent and monosubstituted compounds. These results suggest that specific substitutions in the sugar moieties in the APF can be tolerated, and the glycomimetic design of APF analogues can include fluorine in the GalNAc sugar of the disaccharide.
Collapse
Affiliation(s)
- Maqbool
A. Siddiqui
- Chemical
Biology Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland 21702, United States
| | - Shailesh Ambre
- Chemical
Biology Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland 21702, United States
| | - Susan K. Keay
- Medical
Service, Veterans Administration Maryland Health Care System, Baltimore, Maryland 21201, United States
- Baltimore
Research and Education Foundation, Baltimore, Maryland 21201, United States
- Department of Medicine and Department of
Pathology, University of Maryland School
of Medicine, Baltimore, Maryland 21201, United States
| | - Jeffrey M. Rhyne
- Department of Medicine and Department of
Pathology, University of Maryland School
of Medicine, Baltimore, Maryland 21201, United States
| | - Chen-Ou Zhang
- Department of Medicine and Department of
Pathology, University of Maryland School
of Medicine, Baltimore, Maryland 21201, United States
| | - Joseph J. Barchi
- Chemical
Biology Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, Maryland 21702, United States
- E-mail: . Phone: 301-846-5905. Fax: 301-846-6033 (J.J.B.)
| |
Collapse
|
23
|
Leiria Campo V, Riul TB, Oliveira Bortot L, Martins-Teixeira MB, Fiori Marchiori M, Iaccarino E, Ruvo M, Dias-Baruffi M, Carvalho I. A Synthetic MUC1 Glycopeptide Bearing βGalNAc-Thr as a Tn Antigen Isomer Induces the Production of Antibodies against Tumor Cells. Chembiochem 2017; 18:527-538. [PMID: 28068458 DOI: 10.1002/cbic.201600473] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 01/05/2017] [Indexed: 01/01/2023]
Abstract
This study presents the synthesis of the novel protected O-glycosylated amino acid derivatives 1 and 2, containing βGalNAc-SerOBn and βGalNAc-ThrOBn units, respectively, as mimetics of the natural Tn antigen (αGalNAc-Ser/Thr), along with the solid-phase assembly of the glycopeptides NHAcSer-Ala-Pro-Asp-Thr[αGalNAc]-Arg-Pro-Ala-Pro-Gly-BSA (3-BSA) and NHAcSer-Ala-Pro-Asp-Thr[βGalNAc]-Arg-Pro-Ala-Pro-Gly-BSA (4-BSA), bearing αGalNAc-Thr or βGalNAc-Thr units, respectively, as mimetics of MUC1 tumor mucin glycoproteins. According to ELISA tests, immunizations of mice with βGalNAc-glycopeptide 4-BSA induced higher sera titers (1:320 000) than immunizations with αGalNAc-glycopeptide 3-BSA (1:40 000). Likewise, flow cytometry assays showed higher capacity of the obtained anti-glycopeptide 4-BSA antibodies to recognize MCF-7 tumor cells. Cross-recognition between immunopurified anti-βGalNAc antibodies and αGalNAc-glycopeptide and vice versa was also verified. Lastly, molecular dynamics simulations and surface plasmon resonance (SPR) showed that βGalNAc-glycopeptide 4 can interact with a model antitumor monoclonal antibody (SM3). Taken together, these data highlight the improved immunogenicity of the unnatural glycopeptide 4-BSA, bearing βGalNAc-Thr as Tn antigen isomer.
Collapse
Affiliation(s)
- Vanessa Leiria Campo
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Café S/N, CEP, 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Thalita B Riul
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Café S/N, CEP, 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Leandro Oliveira Bortot
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Café S/N, CEP, 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Maristela B Martins-Teixeira
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Café S/N, CEP, 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Marcelo Fiori Marchiori
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Café S/N, CEP, 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Emanuela Iaccarino
- Istituto di Biostrutture e Bioimmagini, CNR, via Mezzocannone 16, 80134, Napoli, Italy.,Second University of Naples, via Vivaldi 43, 81100, Caserta, Italy
| | - Menotti Ruvo
- Istituto di Biostrutture e Bioimmagini, CNR, via Mezzocannone 16, 80134, Napoli, Italy
| | - Marcelo Dias-Baruffi
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Café S/N, CEP, 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Ivone Carvalho
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. Café S/N, CEP, 14040-903, Ribeirão Preto, São Paulo, Brazil
| |
Collapse
|
24
|
Daum M, Broszeit F, Hoffmann-Röder A. Synthesis of a Fluorinated Sialophorin Hexasaccharide-Threonine Conjugate for Fmoc Solid-Phase Glycopeptide Synthesis. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600523] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Markus Daum
- Center for Integrated Protein Science Munich (CIPS ) at the Department of Chemistry; Ludwig-Maximilians-Universität; Butenandtstr. 5-13 81377 Munich Germany
| | - Frederik Broszeit
- Center for Integrated Protein Science Munich (CIPS ) at the Department of Chemistry; Ludwig-Maximilians-Universität; Butenandtstr. 5-13 81377 Munich Germany
| | - Anja Hoffmann-Röder
- Center for Integrated Protein Science Munich (CIPS ) at the Department of Chemistry; Ludwig-Maximilians-Universität; Butenandtstr. 5-13 81377 Munich Germany
| |
Collapse
|
25
|
Feng D, Shaikh AS, Wang F. Recent Advance in Tumor-associated Carbohydrate Antigens (TACAs)-based Antitumor Vaccines. ACS Chem Biol 2016; 11:850-63. [PMID: 26895482 DOI: 10.1021/acschembio.6b00084] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cancer cells can be distinguished from normal cells by displaying aberrant levels and types of carbohydrate structures on their surfaces. These carbohydrate structures are known as tumor-associated carbohydrate antigens (TACAs). TACAs were considered as promising targets for the design of anticancer vaccines. Unfortunately, carbohydrates alone can only evoke poor immunogenicity because they are unable to induce T-cell-dependent immune responses, which is critical for cancer therapy. Moreover, immunotolerance and immunosuppression are easily induced by using natural occurring TACAs as antigens due to their endogenous property. This review summarizes the recent strategies to overcome these obstacles: (1) covalently coupling TACAs to proper carriers to improve immunogenicity, including clustered or multivalent conjugate vaccines, (2) coupling TACAs to T-cell peptide epitopes or the built-in adjuvant to form multicomponent glycoconjugate vaccines, and (3) developing vaccines based on chemically modified TACAs, which is combined with metabolic engineering of cancer cells.
Collapse
Affiliation(s)
- Danyang Feng
- Key
Laboratory of Chemical Biology of Natural Products (Ministry of education),
Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical
Sciences, Shandong University, Jinan 250012, Shandong, Peoples’ Republic of China
- National
Glycoengineering Research Center, Shandong University, Jinan 50012, Shandong, Peoples’ Republic of ChinaChina
| | - Abdul Sami Shaikh
- Institute
of Clinical Pharmacology, Qilu Hospital of Shandong University, Jinan 250012, Shandong, Peoples’ Republic of China
| | - Fengshan Wang
- Key
Laboratory of Chemical Biology of Natural Products (Ministry of education),
Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical
Sciences, Shandong University, Jinan 250012, Shandong, Peoples’ Republic of China
- National
Glycoengineering Research Center, Shandong University, Jinan 50012, Shandong, Peoples’ Republic of ChinaChina
| |
Collapse
|
26
|
Xiao A, Zheng XJ, Song C, Gui Y, Huo CX, Ye XS. Synthesis and immunological evaluation of MUC1 glycopeptide conjugates bearing N-acetyl modified STn derivatives as anticancer vaccines. Org Biomol Chem 2016; 14:7226-37. [DOI: 10.1039/c6ob01092j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Unnatural STn disaccharides with N-acetyl modifications were incorporated into a 20-amino acid MUC1 tandem repeat sequence. The modified STn-MUC1 glycopeptide–protein conjugates showed high immunogenicity.
Collapse
Affiliation(s)
- An Xiao
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Xiu-Jing Zheng
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Chengcheng Song
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Yue Gui
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Chang-Xin Huo
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| | - Xin-Shan Ye
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- Peking University
- Beijing 100191
- China
| |
Collapse
|
27
|
Santschi N, Aiguabella N, Lewe V, Gilmour R. Delineating the physical organic profile of the 6-fluoro glycosyl donor. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.06.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
28
|
Santschi N, Gilmour R. Comparative Analysis of Fluorine-Directed Glycosylation Selectivity: Interrogating C2 [OH → F] Substitution ind-Glucose andd-Galactose. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501081] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
29
|
|
30
|
Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: an update for 2009-2010. MASS SPECTROMETRY REVIEWS 2015; 34:268-422. [PMID: 24863367 PMCID: PMC7168572 DOI: 10.1002/mas.21411] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 07/16/2013] [Accepted: 07/16/2013] [Indexed: 05/07/2023]
Abstract
This review is the sixth update of the original article published in 1999 on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2010. General aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, arrays and fragmentation are covered in the first part of the review and applications to various structural typed constitutes the remainder. The main groups of compound that are discussed in this section are oligo and polysaccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals. Many of these applications are presented in tabular form. Also discussed are medical and industrial applications of the technique, studies of enzyme reactions and applications to chemical synthesis.
Collapse
Affiliation(s)
- David J. Harvey
- Department of BiochemistryOxford Glycobiology InstituteUniversity of OxfordOxfordOX1 3QUUK
| |
Collapse
|
31
|
Johannes M, Reindl M, Gerlitzki B, Schmitt E, Hoffmann-Röder A. Synthesis and biological evaluation of a novel MUC1 glycopeptide conjugate vaccine candidate comprising a 4'-deoxy-4'-fluoro-Thomsen-Friedenreich epitope. Beilstein J Org Chem 2015; 11:155-161. [PMID: 25670999 PMCID: PMC4311645 DOI: 10.3762/bjoc.11.15] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 01/02/2015] [Indexed: 02/03/2023] Open
Abstract
The development of selective anticancer vaccines that provide enhanced protection against tumor recurrence and metastasis has been the subject of intense research in the scientific community. The tumor-associated glycoprotein MUC1 represents a well-established target for cancer immunotherapy and has been used for the construction of various synthetic vaccine candidates. However, many of these vaccine prototypes suffer from an inherent low immunogenicity and are susceptible to rapid in vivo degradation. To overcome these drawbacks, novel fluorinated MUC1 glycopeptide-BSA/TTox conjugate vaccines have been prepared. Immunization of mice with the 4’F-TF-MUC1-TTox conjugate resulted in strong immune responses overriding the natural tolerance against MUC1 and producing selective IgG antibodies that are cross-reactive with native MUC1 epitopes on MCF-7 human cancer cells.
Collapse
Affiliation(s)
- Manuel Johannes
- Department of Chemistry and Center of Integrated Protein Science Munich (CIPSM), Ludwig-Maximilians University, Butenandtstraße 5-13, D-81377 Munich, Germany
| | - Maximilian Reindl
- Department of Chemistry and Center of Integrated Protein Science Munich (CIPSM), Ludwig-Maximilians University, Butenandtstraße 5-13, D-81377 Munich, Germany
| | - Bastian Gerlitzki
- Institute for Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstraße 1, Geb. 708, D-55101 Mainz, Germany
| | - Edgar Schmitt
- Institute for Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstraße 1, Geb. 708, D-55101 Mainz, Germany
| | - Anja Hoffmann-Röder
- Department of Chemistry and Center of Integrated Protein Science Munich (CIPSM), Ludwig-Maximilians University, Butenandtstraße 5-13, D-81377 Munich, Germany
| |
Collapse
|
32
|
Wang W, Yang Z, Xu Y, Liu T, Song T, Zhao Y, Xu X, Zhao W, Wang PG. “Armed and disarmed” theory in the addition of an azide radical to glucals. RSC Adv 2015. [DOI: 10.1039/c5ra00296f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
“Armed” glucals were prone to undergo kinetic process. The torsional strains govern the selectivity. Meanwhile, “disarmed” glucals preferred thermodynamic radical addition. A sialic acid containing trisaccharide was also synthesized by the method.
Collapse
Affiliation(s)
- Wenjun Wang
- College of Pharmacy
- State Key Laboratory of Elemento-organic Chemistry
- Tianjin Key Laboratory of Molecular Drug Research and Synergetic Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| | - Zhongyue Yang
- College of Chemistry
- Nankai University
- Tianjin
- PR China
| | - Yun Xu
- College of Pharmacy
- State Key Laboratory of Elemento-organic Chemistry
- Tianjin Key Laboratory of Molecular Drug Research and Synergetic Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| | - Taibao Liu
- College of Pharmacy
- State Key Laboratory of Elemento-organic Chemistry
- Tianjin Key Laboratory of Molecular Drug Research and Synergetic Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| | - Tianbang Song
- College of Pharmacy
- State Key Laboratory of Elemento-organic Chemistry
- Tianjin Key Laboratory of Molecular Drug Research and Synergetic Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| | - Yunyan Zhao
- College of Pharmacy
- State Key Laboratory of Elemento-organic Chemistry
- Tianjin Key Laboratory of Molecular Drug Research and Synergetic Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| | - Xiufang Xu
- College of Chemistry
- Nankai University
- Tianjin
- PR China
| | - Wei Zhao
- College of Pharmacy
- State Key Laboratory of Elemento-organic Chemistry
- Tianjin Key Laboratory of Molecular Drug Research and Synergetic Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| | - Peng George Wang
- College of Pharmacy
- State Key Laboratory of Elemento-organic Chemistry
- Tianjin Key Laboratory of Molecular Drug Research and Synergetic Innovation Center of Chemical Science and Engineering
- Nankai University
- Tianjin 300071
| |
Collapse
|
33
|
Huo CX, Zheng XJ, Xiao A, Liu CC, Sun S, Lv Z, Ye XS. Synthetic and immunological studies of N-acyl modified S-linked STn derivatives as anticancer vaccine candidates. Org Biomol Chem 2015; 13:3677-90. [DOI: 10.1039/c4ob02424a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N-Modified S-linked STn glycoconjugates significantly stimulated the production of IgG antibodies capable of recognizing the naturally occurring STn antigen.
Collapse
Affiliation(s)
- Chang-Xin Huo
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- and Center for Molecular and Translational Medicine
- Peking University
- Beijing 100191
| | - Xiu-Jing Zheng
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- and Center for Molecular and Translational Medicine
- Peking University
- Beijing 100191
| | - An Xiao
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- and Center for Molecular and Translational Medicine
- Peking University
- Beijing 100191
| | - Chang-Cheng Liu
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- and Center for Molecular and Translational Medicine
- Peking University
- Beijing 100191
| | - Shuang Sun
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- and Center for Molecular and Translational Medicine
- Peking University
- Beijing 100191
| | - Zhuo Lv
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- and Center for Molecular and Translational Medicine
- Peking University
- Beijing 100191
| | - Xin-Shan Ye
- State Key Laboratory of Natural and Biomimetic Drugs
- School of Pharmaceutical Sciences
- and Center for Molecular and Translational Medicine
- Peking University
- Beijing 100191
| |
Collapse
|
34
|
Cai X, Tsuchikama K, Janda KD. Modulating cocaine vaccine potency through hapten fluorination. J Am Chem Soc 2013; 135:2971-4. [PMID: 23398531 DOI: 10.1021/ja400356g] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Cocaine addiction is a long-lasting relapsing illness characterized by cycles of abuse, abstinence, and reinstatement, and antibody-based therapies could be a powerful therapeutic approach. Herein, we explored the possibility of using halogenated cocaine haptens to enhance the immunological properties of anti-cocaine vaccines. Three fluorine-containing cocaine haptens (GNF, GNCF and GN5F) and one chlorine-containing cocaine hapten (GNCl) were designed and synthesized, based upon the chemical scaffold of the only hapten that has reached clinical trials, succinyl norcocaine (SNC). Hapten GNF was found to retain potent cocaine affinity, and also elicit antibodies in a higher concentration than the parent structure SNC. Our data suggests that not only could strategic hapten fluorination be useful for improving upon the current cocaine vaccine undergoing clinical trials, but it may also be a valuable new approach, with application to any of the vaccines being developed for the treatment of drugs of abuse.
Collapse
Affiliation(s)
- Xiaoqing Cai
- Department of Chemistry, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
| | | | | |
Collapse
|
35
|
Yan J, Chen X, Wang F, Cao H. Chemoenzymatic synthesis of mono- and di-fluorinated Thomsen-Friedenreich (T) antigens and their sialylated derivatives. Org Biomol Chem 2013; 11:842-8. [PMID: 23241945 PMCID: PMC3616747 DOI: 10.1039/c2ob26989a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorinated Thomsen-Friedenreich (T) antigens were synthesized efficiently from chemically produced fluorinated monosaccharides using a highly efficient one-pot two-enzyme chemoenzymatic approach containing a galactokinase and a D-galactosyl-β1-3-N-acetyl-D-hexosamine phosphorylase. These fluorinated T-antigens were further sialylated to form fluorinated ST-antigens using a one-pot two-enzyme system containing a CMP-sialic acid synthetase and an α-2-3-sialyltransferase.
Collapse
Affiliation(s)
- Jun Yan
- National Glycoengineering Research Center, School of Pharmaceutical Science, Shandong University, Jinan 250012, China. Fax: +86 531 88363002; Tel: + 86 531 88382235; Fax: +86 531 88382548; Tel: + 86 53188382589
| | - Xi Chen
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA. Fax: +1 530 7528995; Tel: + 1 530 7546037
| | - Fengshan Wang
- National Glycoengineering Research Center, School of Pharmaceutical Science, Shandong University, Jinan 250012, China. Fax: +86 531 88363002; Tel: + 86 531 88382235; Fax: +86 531 88382548; Tel: + 86 53188382589
- Key Laboratory of Chemical Biology (Ministry of Education), Shandong University, Jinan 250012,China
| | - Hongzhi Cao
- National Glycoengineering Research Center, School of Pharmaceutical Science, Shandong University, Jinan 250012, China. Fax: +86 531 88363002; Tel: + 86 531 88382235; Fax: +86 531 88382548; Tel: + 86 53188382589
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| |
Collapse
|
36
|
|
37
|
Oberbillig T, Löwe H, Hoffmann-Röder A. Synthesis of Fluorinated Glycosyl Amino Acid Building Blocks for MUC1 Cancer Vaccine Candidates by Microreactor-Assisted Glycosylation. J Flow Chem 2012. [DOI: 10.1556/jfc-d-12-00011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
38
|
Carbohydrate-based cancer vaccines: target cancer with sugar bullets. Glycoconj J 2012; 29:259-71. [DOI: 10.1007/s10719-012-9399-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 05/12/2012] [Accepted: 05/21/2012] [Indexed: 12/31/2022]
|
39
|
Liu J, Chan J, Bryant CM, Duspara PA, Lee EE, Powell D, Yang H, Liu Z, Walpole C, Roberts E, Batey RA. Effect of acid catalysis on the direct electrophilic fluorination of ketones, ketals, and enamides using Selectfluor™. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.03.074] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
40
|
Durantie E, Bucher C, Gilmour R. Fluorine-directed β-galactosylation: chemical glycosylation development by molecular editing. Chemistry 2012; 18:8208-15. [PMID: 22592962 DOI: 10.1002/chem.201200468] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Indexed: 11/10/2022]
Abstract
Validation of the 2-fluoro substituent as an inert steering group to control chemical glycosylation is presented. A molecular editing study has revealed that the exceptional levels of diastereocontrol in glycosylation processes by using 2-fluoro-3,4,6-tri-O-benzyl glucopyranosyl trichloroacetimidate (TCA) scaffolds are a consequence of the 2R,3S,4S stereotriad. This study has also revealed that epimerization at C4, results in a substantial enhancement in β-selectivity (up to β/α 300:1).
Collapse
Affiliation(s)
- Estelle Durantie
- Laboratory for Organic Chemistry, Swiss Federal Institute of Technology (ETH) Zürich, 8093 Zürich, Switzerland
| | | | | |
Collapse
|
41
|
Recent advances in developing synthetic carbohydrate-based vaccines for cancer immunotherapies. Future Med Chem 2012; 4:545-84. [DOI: 10.4155/fmc.11.193] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Cancer cells can often be distinguished from healthy cells by the expression of unique carbohydrate sequences decorating the cell surface as a result of aberrant glycosyltransferase activity occurring within the cell; these unusual carbohydrates can be used as valuable immunological targets in modern vaccine designs to raise carbohydrate-specific antibodies. Many tumor antigens (e.g., GM2, Ley, globo H, sialyl Tn and TF) have been identified to date in a variety of cancers. Unfortunately, carbohydrates alone evoke poor immunogenicity, owing to their lack of ability in inducing T-cell-dependent immune responses. In order to enhance their immunogenicity and promote long-lasting immune responses, carbohydrates are often chemically modified to link to an immunogenic protein or peptide fragment for eliciting T-cell-dependent responses. This review will present a summary of efforts and advancements made to date on creating carbohydrate-based anticancer vaccines, and will include novel approaches to overcoming the poor immunogenicity of carbohydrate-based vaccines.
Collapse
|
42
|
Oberbillig T, Mersch C, Wagner S, Hoffmann-Röder A. Antibody recognition of fluorinated MUC1 glycopeptide antigens. Chem Commun (Camb) 2012; 48:1487-9. [DOI: 10.1039/c1cc15139h] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
43
|
Linclau B, Golten S, Light M, Sebban M, Oulyadi H. The conformation of tetrafluorinated methyl galactoside anomers: crystallographic and NMR studies. Carbohydr Res 2011; 346:1129-39. [PMID: 21531398 DOI: 10.1016/j.carres.2011.04.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 03/27/2011] [Accepted: 04/03/2011] [Indexed: 10/18/2022]
Abstract
The first single-crystal X-ray diffraction study of tetrafluorinated monosaccharide derivatives is presented. Both α- and β-methyl 2,3-dideoxy-2,2,3,3-tetrafluoro-d-galactopyranoside anomers adopt the (4)C(1) conformation. The values for the C1-O1 and C1-O5 bond lengths and the O5-C1-O1-CH(3) dihedral angles are in line with what can be expected from the anomeric and exo-anomeric effects. The chair conformations are slightly distorted, presumably due to repulsion between 1,3-diaxial C-O and C-F bonds. The asymmetric unit of both compounds contains up to three independent molecules, which differ in the conformation of the hydroxymethyl group (including in one case a 'forbidden'gg rotamer). The molecular packing of the β-anomer shows a clear segregation between fluorinated and hydrophilic domains, while for the α-anomer the regions of fluorine segregation are broken by interleafing of OMe groups. There is one close OH⋯F contact, which is likely to arise from the crystal packing. NMR studies show that the two anomers also adopt a (4)C(1) conformation in solution (D(2)O, CDCl(3)).
Collapse
Affiliation(s)
- Bruno Linclau
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom.
| | | | | | | | | |
Collapse
|
44
|
Brand C, Granitzka M, Stalke D, Werz DB. Reducing the conformational flexibility of carbohydrates: locking the 6-hydroxyl group by cyclopropanes. Chem Commun (Camb) 2011; 47:10782-4. [DOI: 10.1039/c1cc14025f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
45
|
Johannes M, Oberbillig T, Hoffmann-Röder A. Synthesis of fluorinated Thomsen–Friedenreich antigens: direct deoxyfluorination of αGalNAc-threonine tert-butyl esters. Org Biomol Chem 2011; 9:5541-6. [DOI: 10.1039/c1ob05373f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
46
|
Hoffmann-Röder A, Johannes M. Synthesis of a MUC1-glycopeptide–BSA conjugate vaccine bearing the 3′-deoxy-3′-fluoro-Thomsen–Friedenreich antigen. Chem Commun (Camb) 2011; 47:9903-5. [DOI: 10.1039/c1cc13184b] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
47
|
Corzana F, Busto JH, Marcelo F, García de Luis M, Asensio JL, Martín-Santamaría S, Sáenz Y, Torres C, Jiménez-Barbero J, Avenoza A, Peregrina JM. Rational design of a Tn antigen mimic. Chem Commun (Camb) 2011; 47:5319-21. [DOI: 10.1039/c1cc10192g] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|