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Zhu X, Yi Y, Fan Z, Liu R, Chu X, Wang M, Zhang J, Tretyakova E, Zhang Y, Zhang L, Zhou D, Xiao S. Novel mono- and multivalent N-acetylneuraminic acid glycoclusters as potential broad-spectrum entry inhibitors for influenza and coronavirus infection. Eur J Med Chem 2023; 260:115723. [PMID: 37595545 DOI: 10.1016/j.ejmech.2023.115723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Revised: 06/19/2023] [Accepted: 08/12/2023] [Indexed: 08/20/2023]
Abstract
N-acetylneuraminic acid (Neu5Ac) is a glycan receptor of viruses spread in many eukaryotic cells. The present work aimed to design, synthesis and biological evaluation of a panel of Neu5Ac derivatives based on a cyclodextrin (CD) scaffold for targeting influenza and coronavirus membrane proteins. The multivalent Neu5Ac glycoclusters efficiently inhibited chicken erythrocyte agglutination induced by intact influenza virus in a Neu5Ac density-dependent fashion. Compared with inhibition by Neu5Ac, the multivalent inhibitor with 21 Neu5Ac residues on the primary face of the β-CD scaffold afforded 1788-fold higher binding affinity inhibition for influenza virus hemagglutinin with a dissociation constant (KD) of 3.87 × 10-7 M. It showed moderate binding affinity to influenza virus neuraminidase, but with only about one-thirtieth the potency of that with the HA protein. It also exhibited strong binding affinity to the spike protein of three human coronaviruses (severe acute respiratory syndrome coronavirus, Middle East respiratory syndrome coronavirus, and severe acute respiratory syndrome coronavirus 2), with KD values in the low micromolar range, which is about 10-time weaker than that of HA. Therefore, these multivalent sialylated CD derivatives have possible therapeutic application as broad-spectrum antiviral entry inhibitors for many viruses by targeting the Neu5Ac of host cells.
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Affiliation(s)
- Xingxing Zhu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Yanliang Yi
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Zibo Fan
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Ruiwen Liu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Xindang Chu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Mengyang Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Jiayi Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Elena Tretyakova
- Ufa Institute of Chemistry UFRC RAS, Pr. Oktyabrya 71, 450054, Ufa, Russian Federation
| | - Yongmin Zhang
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, UMR 8232, 4 Place Jussieu, 75005, Paris, France
| | - Lihe Zhang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China
| | - Demin Zhou
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China; Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen, 518132, China; Ningbo Institute of Marine Medicine, Peking University, Ningbo, 315010, China
| | - Sulong Xiao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing, 100191, China; Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen, 518132, China; Ningbo Institute of Marine Medicine, Peking University, Ningbo, 315010, China.
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Shit P, Sahaji S, Misra AK. Synthesis of selenoglycosides and selenium linked disaccharides using reductive cleavage of diselenides. Carbohydr Res 2022; 516:108554. [DOI: 10.1016/j.carres.2022.108554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 03/28/2022] [Accepted: 03/30/2022] [Indexed: 11/02/2022]
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Manna T, Rana A, Misra AK. Synthesis of unsymmetrical glycosyl diselenides by the treatment of symmetrical diselenides with glycosyl selenocyanates. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132358] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Mousavifar L, Abdullayev S, Roy R. Recent Development in the Design of Neoglycoliposomes Bearing Arborescent Architectures. Molecules 2021; 26:molecules26144281. [PMID: 34299556 PMCID: PMC8303545 DOI: 10.3390/molecules26144281] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/08/2021] [Accepted: 07/12/2021] [Indexed: 12/12/2022] Open
Abstract
This brief review highlights systematic progress in the design of synthetic glycolipid (neoglycolipids) analogs evolving from the conventional architectures of natural glycosphingolipids and gangliosides. Given that naturally occurring glycolipids are composed of only one hydrophilic sugar head-group and two hydrophobic lipid tails embedded in the lipid bilayers of the cell membranes, they usually require extraneous lipids (phosphatidylcholine, cholesterol) to confer their stability. In order to obviate the necessity for these additional stabilizing ingredients, recent investigations have merged dendrimer chemistry with that of neoglycolipid syntheses. This singular approach has provided novel glycoarchitectures allowing reconsidering the necessity for the traditional one to two hydrophilic/hydrophobic ratio. An emphasis has been provided in the recent design of modular arborescent neoglycolipid syntheses coined glycodendrimersomes.
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Affiliation(s)
| | | | - René Roy
- Correspondence: ; Tel.: +1-514-987-3000 (ext. 2546)
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Manna T, Misra AK. Glycosyl selenoacetates: versatile building blocks for the preparation of stereoselective selenoglycosides and selenium linked disaccharides. Org Biomol Chem 2019; 17:8902-8912. [PMID: 31553009 DOI: 10.1039/c9ob01623f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Glycosyl selenoacetate derivatives were prepared by the treatment of glycosyl halide with potassium selenocyanate followed by acetylation of in situ generated glycosyl selenols in one pot. A variety of selenoglycosides and selenium linked disaccharide derivatives were prepared in very good to excellent yields using glycosyl selenoacetates as stable building blocks under mild reaction conditions.
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Affiliation(s)
- Tapasi Manna
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII M, Kolkata 700054, India.
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Roy R, Shiao TC. Glyconanosynthons as powerful scaffolds and building blocks for the rapid construction of multifaceted, dense and chiral dendrimers. Chem Soc Rev 2015; 44:3924-41. [DOI: 10.1039/c4cs00359d] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The arsenal of available carbohydrates can be manipulated to provide versatile building blocks toward the syntheses of complex and chiral dendrimers.
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Affiliation(s)
- René Roy
- Pharmaqam and Nanoqam
- Department of Chemistry
- Université du Québec à Montréal
- Montréal
- Canada
| | - Tze Chieh Shiao
- Pharmaqam and Nanoqam
- Department of Chemistry
- Université du Québec à Montréal
- Montréal
- Canada
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Titov DV, Gening ML, Tsvetkov YE, Nifantiev NE. Conjugates of cyclooligosaccharide scaffolds and carbohydrate ligands: Methods for synthesis and the interaction with lectins. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2013; 39:509-46. [DOI: 10.1134/s1068162013050142] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Brachet E, Brion JD, Alami M, Messaoudi S. Stereoselective Palladium-Catalyzed Alkenylation and Alkynylation of Thioglycosides. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300419] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Martínez Á, Ortiz Mellet C, García Fernández JM. Cyclodextrin-based multivalent glycodisplays: covalent and supramolecular conjugates to assess carbohydrate-protein interactions. Chem Soc Rev 2013; 42:4746-73. [PMID: 23340678 DOI: 10.1039/c2cs35424a] [Citation(s) in RCA: 187] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Covalent attachment of biorecognizable sugar ligands in several copies at precise positions of cyclomaltooligosaccharide (cyclodextrin, CD) macrocycles has proven to be an extremely flexible strategy to build multivalent conjugates. The commercial availability of the native CDs in three different sizes, their axial symmetry and the possibility of position- and face-selective functionalization allow a strict control of the valency and spatial orientation of the recognition motifs (glycotopes) in low, medium, high and hyperbranched glycoclusters, including glycodendrimer-CD hybrids. "Click-type" ligation chemistries, including copper(i)-catalyzed azide-alkyne cycloaddition (CuAAC), thiol-ene coupling or thiourea-forming reactions, have been implemented to warrant full homogeneity of the adducts. The incorporation of different glycotopes to investigate multivalent interactions in heterogeneous environments has also been accomplished. Not surprisingly, multivalent CD conjugates have been, and continue to be, major actors in studies directed at deciphering the structural features ruling carbohydrate recognition events. Nanometric glycoassemblies endowed with the capability of adapting the inter-saccharide distances and orientations in the presence of a receptor partner or capable of mimicking the fluidity of biological membranes have been conceived by multitopic inclusion complex formation, rotaxanation or self-assembling. Applications in the fields of sensors, site-specific drug and gene delivery or protein stabilization attest for the maturity of the field.
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Affiliation(s)
- Álvaro Martínez
- Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, c/ Profesor García González 1, E-41012 Sevilla, Spain
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Gingras M, Chabre YM, Roy M, Roy R. How do multivalent glycodendrimers benefit from sulfur chemistry? Chem Soc Rev 2013; 42:4823-41. [DOI: 10.1039/c3cs60090d] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Abstract
From the authors' opinion, this chapter constitutes a modest extension of the seminal and inspiring contribution of Stowell and Lee on neoglycoconjugates published in this series [C. P. Stowell and Y. C. Lee, Adv. Carbohydr. Chem. Biochem., 37 (1980) 225-281]. The outstanding progresses achieved since then in the field of the "glycoside cluster effect" has witnessed considerable creativity in the design and synthetic strategies toward a vast array of novel carbohydrate structures and reflects the dynamic activity in the field even since the recent chapter by the Nicotra group in this series [F. Nicotra, L. Cipolla, F. Peri, B. La Ferla, and C. Radaelli, Adv. Carbohydr. Chem. Biochem., 61 (2007) 353-398]. Beyond the more classical neoglycoproteins and glycopolymers (not covered in this work) a wide range of unprecedented and often artistically beautiful multivalent and monodisperse nanostructures, termed glycodendrimers for the first time in 1993, has been created. This chapter briefly surveys the concept of multivalency involved in carbohydrate-protein interactions. The topic is also discussed in regard to recent steps undertaken in glycobiology toward identification of lead candidates using microarrays and modern analytical tools. A systematic description of glycocluster and glycodendrimer synthesis follows, starting from the simplest architectures and ending in the most complex ones. Presentation of multivalent glycostructures of intermediate size and comprising, calix[n]arene, porphyrin, cyclodextrin, peptide, and carbohydrate scaffolds, has also been intercalated to better appreciate the growing synthetic complexity involved. A subsection describing novel all-carbon-based glycoconjugates such as fullerenes and carbon nanotubes is inserted, followed by a promising strategy involving dendrons self-assembling around metal chelates. The chapter then ends with those glycodendrimers that have been prepared using commercially available dendrimers possessing varied functionalities, or systematically synthesized using either divergent or convergent strategies.
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Oda Y, Miura M, Hattori K, Yamanoi T. Syntheses and Doxorubicin-Inclusion Abilities of .BETA.-Cyclodextrin Derivatives with a Hydroquinone .ALPHA.-Glycoside Residue Attached at the Primary Side. Chem Pharm Bull (Tokyo) 2009; 57:74-8. [DOI: 10.1248/cpb.57.74] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Masumi Miura
- The Noguchi Institute
- Department of Nanochemistry, Faculty of Engineering, Tokyo Polytechnic University
| | - Kenjiro Hattori
- Department of Nanochemistry, Faculty of Engineering, Tokyo Polytechnic University
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Oda Y, Yanagisawa H, Maruyama M, Hattori K, Yamanoi T. Design, synthesis and evaluation of d-galactose-β-cyclodextrin conjugates as drug-carrying molecules. Bioorg Med Chem 2008; 16:8830-40. [DOI: 10.1016/j.bmc.2008.08.076] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2008] [Revised: 08/27/2008] [Accepted: 08/29/2008] [Indexed: 11/26/2022]
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16
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Katoh M, Kohmoto S, Kishikawa K. A hexagonal columnar packing structure of C7 symmetric supramolecules: a superstructure of a 2:3 complex of heptakis-(6-O-tert-butyldimethylsilyl)-β-cyclodextrin and ethyl acetate. CRYSTAL RESEARCH AND TECHNOLOGY 2006. [DOI: 10.1002/crat.200610757] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Stubbs KA, Macauley MS, Vocadlo DJ. A highly concise preparation of O-deacetylated arylthioglycosides of N-acetyl-D-glucosamine from 2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-alpha-D-glucopyranosyl chloride and aryl thiols or disulfides. Carbohydr Res 2006; 341:1764-9. [PMID: 16472788 DOI: 10.1016/j.carres.2005.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2005] [Revised: 12/19/2005] [Accepted: 12/24/2005] [Indexed: 11/27/2022]
Abstract
An expedient and mild route to a range of aryl 2-acetamido-2-deoxy-1-thio-beta-D-glucopyranosides has been devised from 2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-alpha-D-glucopyranosyl chloride and arylthiols or aryl disulfides using phase transfer catalysis conditions. This simple procedure compresses up to three synthetic steps into a one-pot reaction, obviating the need for tedious workups and chromatography and directly furnishes crystalline materials in good yields. The procedure is compatible with a range of thiols and disulfides and may be amenable for preparing a wide range of thioglycosides with various glycons and aglycons.
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Affiliation(s)
- Keith A Stubbs
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC, Canada V5A 1S6
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Carpenter C, Nepogodiev SA. Synthesis of a αMan(1→3)αMan(1→2)αMan Glycocluster Presented on aβ-Cyclodextrin Scaffold. European J Org Chem 2005. [DOI: 10.1002/ejoc.200500146] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Yamanoi T, Yoshida N, Oda Y, Akaike E, Tsutsumida M, Kobayashi N, Osumi K, Yamamoto K, Fujita K, Takahashi K, Hattori K. Synthesis of mono-glucose-branched cyclodextrins with a high inclusion ability for doxorubicin and their efficient glycosylation using Mucor hiemalis endo-beta-N-acetylglucosaminidase. Bioorg Med Chem Lett 2005; 15:1009-13. [PMID: 15686902 DOI: 10.1016/j.bmcl.2004.12.040] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2004] [Revised: 12/13/2004] [Accepted: 12/14/2004] [Indexed: 12/01/2022]
Abstract
The mono-glucose-branched cyclodextrins having an appropriate spacer between the beta-cyclodextrin and a glucose moiety were synthesized from beta-cyclodextrin and arbutin. They had the significantly high association constants for doxorubicin, the anticancer agent, in the range of 10(5)-10(6)M(-1), and worked as highly reactive glycosyl acceptors for the transglycosylation reaction by endo-beta-N-acetylglucosaminidase of Mucor hiemalis to produce sialo-complex type oligosaccharide-branched cyclodextrins in the high yields of 65-67%.
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Affiliation(s)
- Takashi Yamanoi
- The Noguchi Institute, 1-8-1 Kaga, Itabashi-ku, Tokyo 173-0003, Japan.
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Sridhar P, Prabhu K, Chandrasekaran S. Synthesis of Thioglycosides by Tetrathiomolybdate-Mediated Michael Additions of Masked Thiolates. European J Org Chem 2004. [DOI: 10.1002/ejoc.200400360] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Mazzaglia A, Forde D, Garozzo D, Malvagna P, Ravoo BJ, Darcy R. Multivalent binding of galactosylated cyclodextrin vesicles to lectin. Org Biomol Chem 2004; 2:957-60. [PMID: 15034615 DOI: 10.1039/b400988f] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amphiphilic beta-cyclodextrins with alkylthio chains at the primary-hydroxyl side and galactosylthio-oligo-(ethylene glycol) units at the secondary-hydroxyl side, which form nanoparticles and vesicles, show multivalent effects in their binding to lectin.
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Affiliation(s)
- Antonino Mazzaglia
- Istituto per lo Studio dei Materiali Nanostrutturati (ISMN-CNR), Unita di Messina, Dipartimento di Chimica Inorganica, Chimica Fisica e Chimica Analitica, and INFM, Salita Sperone 31, 98166 Messina, Italy.
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Sansone F, Chierici E, Casnati A, Ungaro R. Thiourea-linked upper rim calix[4]arene neoglycoconjugates: synthesis, conformations and binding properties. Org Biomol Chem 2003; 1:1802-9. [PMID: 12926373 DOI: 10.1039/b301595e] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thiourea group has been exploited to link two or four carbohydrate units at the upper rim of tetrapropoxycalix[4]arene derivatives in the cone conformation. Two synthetic methodologies were used, the first one consisting of the condensation of di- and tetraminocalix[4]arenes with the isothiocyanate of monosaccharides in dry CH2Cl2 at room temperature and the second one exploiting the condensation of an aminolactoside with a calixarene isothiocyanate. The first method allows the glycoconjugates to be obtained in 75-80% overall yields. The disfunctionalized derivatives exist in a closed flattened cone conformation in CDCl3 and CD3OD due to the formation of intramolecular hydrogen bonds involving the thiourea groups which are broken in DMSO-d6 to give an open flattened cone conformation. The thiourea groups act not only as linkers but also as binding units for anionic substrates as evidenced by solution 1H NMR and ESI-MS experiments. Turbidimetric analysis indicates that the tetraglucoside and tetragalactoside clusters give specific interactions with Concanavalin A (Con A) and peanut lectin (PNA), respectively. Both features show that the neoglycoconjugates could also be used as site specific molecular delivery systems.
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Affiliation(s)
- Francesco Sansone
- Dipartimento di Chimica Organica e Industriale, Università degli Studi, Parco Area delle Scienze 17/A, I-43100 Parma, Italy
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Katajisto J, Karskela T, Heinonen P, Lönnberg H. An Orthogonally Protected alpha,alpha-bis(aminomethyl)-beta-alanine building block for the construction of glycoconjugates on a solid support. J Org Chem 2002; 67:7995-8001. [PMID: 12423126 DOI: 10.1021/jo026053b] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Synthetic glycoclusters are extensively used as mimetics of naturally occurring, multivalent carbohydrate ligands in various glycobiological applications. Their preparation, however, is far from trivial, and it still is a limiting factor in the study of carbohydrate binding. We herein report the synthesis of an orthogonally protected building block, N-Alloc-N'-Boc-N' '-Fmoc-alpha,alpha-bis(aminomethyl)-beta-alanine (1), and its use in the preparation of triantennary peptide glycoclusters (21-24) on a solid support. The assembly of the clusters involves removal of the amino protections of the solid-supported branching unit 1 in the order Fmoc, Boc, and Alloc, and subsequent coupling of peracetylated O-(glycopyranosyl)-N-Fmoc-L-serine pentafluorophenyl esters (galactose, glucose, mannose, and ribose) to each amino group exposed.
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Affiliation(s)
- Johanna Katajisto
- Department of Chemistry, University of Turku, FIN-20014 Turku, Finland.
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Dondoni A, Kleban M, Hu X, Marra A, Banks HD. Glycoside-clustering round calixarenes toward the development of multivalent ligands. Synthesis and conformational analysis of Calix[4]arene O- and C-glycoconjugates. J Org Chem 2002; 67:4722-33. [PMID: 12098281 DOI: 10.1021/jo020178z] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Bis- and tetra-O- and C-glycosyl calixarenes (calixsugars) have been prepared by tethering carbohydrate moieties to a tetrapropoxycalix[4]arene scaffold through alkyl chains. Two methodologies have been employed. One consisted of the stereoselective multiple glycosylation of upper rim calix[4]arene polyols leading to calix-O-glycosides; the other involved a multiple Wittig olefination of upper rim calix[4]arene-derived polyaldehydes by the use of sugar phosphoranes and reduction of the alkene double bonds affording calix-C-glycosides. The NMR spectra and NOE experiments of bis-glycosylated products indicate that compounds bearing sugar-protected residues exist preferentially in solution in a flattened cone arrangement (far conformation) whereas deprotected derivatives adopt a close conformation. Calculations by molecular mechanics of the latter compounds point to a close conformation as well in gas phase.
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Affiliation(s)
- Alessandro Dondoni
- Dipartimento di Chimica, Laboratorio di Chimica Organica, Università di Ferrara, 44100 Ferrara, Italy.
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Roy R, Baek MG. Glycodendrimers: novel glycotope isosteres unmasking sugar coding. case study with T-antigen markers from breast cancer MUC1 glycoprotein. J Biotechnol 2002; 90:291-309. [PMID: 12071230 DOI: 10.1016/s1389-0352(01)00065-4] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Glycodendrimers are relatively novel synthetic biomacromolecules that are made of biologically relevant carbohydrate ligands constructed at the periphery of a wide range of highly functionalized and repetitive scaffolds having varied molecular weights and structures. They were aimed to fill the gap between glycopolymers, having generally dispersed higher molecular weight, and small glycoclusters, in the study of multivalent carbohydrate protein interactions. In a way, glycodendrimers, with their spheroidal or dendritic (wedge) type structures, were initially designed as bioisosteres of cell surface multiantennary glycans. Taken as a curiosity and elegant molecules at their beginning, they are now considered as potent inhibitors of microbial adhesins. They have also been shown to play some roles in signal transduction and in receptor cross-linking. This brief report will describe advances that have been made toward the syntheses of a range of glycodendrimers bearing the immunodominant T-antigen disaccharide [beta-D-Gal-(1-3)-alpha-D-GalNAc] found on malignant cells of carcinomas, particularly related to breast cancer. This antigen, usually cryptic on healthy tissues, is greatly increased on cancer cells as a result of aberrant glycosylation. It is considered to be an important cancer marker. The high incidence of these carcinomas to invade other tissues such as lymph nodes, lung, and liver by metastasis was one of the arguments raised to generate T-antigen dendrimers that might have the potential to block the receptor sites following surgery. The synthesis of the T-antigen disaccharide will be briefly described, followed by the elaboration of neoglycoproteins and glycopolymers used to raise monoclonal antibodies against the T-antigen and for screening purpose, respectively. Scaffolds made of poly(amidoamine) (PAMAM), poly(propylene imine), N,N'-bis(acrylamido)acetic acid, and finally hyperbranched L-lysine were used to construct relatively small glycodendrimers bearing T-antigen moieties. Few glycodendrimers were also linked to fluorescein and biotin probes to generate ligands that can be used to detect T-Ag receptor sites.
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Affiliation(s)
- René Roy
- Centre for Research in Biopharmaceuticals, Department of Chemistry, University of Ottawa, ON, Canada.
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Vargas-Berenguel A, Ortega-Caballero F, Santoyo-González F, García-López JJ, Giménez-Martínez JJ, García-Fuentes L, Ortiz-Salmerón E. Dendritic galactosides based on a beta-cyclodextrin core for the construction of site-specific molecular delivery systems: synthesis and molecular recognition studies. Chemistry 2002; 8:812-27. [PMID: 11857696 DOI: 10.1002/1521-3765(20020215)8:4<812::aid-chem812>3.0.co;2-p] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In order to evaluate the ability of multivalent glycosides based on a beta-cyclodextrin core as site-specific molecular carriers, a study on both the inclusion complexation behaviour and lectin binding affinity of branched and hyperbranched beta-cyclodextrins is presented. A series of cluster galactosides constructed on beta-cyclodextrin scaffolds containing seven 1-thio-beta-lactose or beta-lactosylamine bound to the macrocyclic core through different spacer arms were synthesised. In addition, the first synthesis of three first-order dendrimers based on a beta-cyclodextrin core containing fourteen 1-thio-beta-D-galactose, 1-thio-beta-lactose and 1-thio-beta-melibiose residues was performed. Calorimetric titrations performed at 25 degrees C in buffered aqueous solution (pH 7.4) gave the affinity constants and the thermodynamic parameters for the complex formation of these beta-cyclodextrin derivatives with guests sodium 8-anilino-1-naphthalenesulfonate (ANS) and 2-naphthalenesulfonate, and lectin from peanut (Arachis hypogaea) (PNA). The persubstitution of the primary face of the beta-cyclodextrin with saccharides led to a slight increase of the binding constant values for the inclusion complexation with ANS relative to the native beta-cyclodextrin. However, the increase of the steric congestion due to the presence of the saccharide residues on the narrow rim of the beta-cyclodextrin may cause a decrease of the binding ability as shown for sodium 2-naphthalenesulfonate. The spacer arms are not passive elements and influence the host binding ability according to their chemical nature. PNA forms soluble cross-linked complexes with cluster galactosides and lactosides scaffolded on beta-cyclodextrin but not with cluster galactopyranosylamines or melibiose. Both, perbranched and hyperbranched beta-cyclodextrins, form stronger complexes with PNA than the monomeric analogues. However, the use of hyperbranched CDs does not contribute to the improvement of the complex stability relative to heptakis-glycocyclodextrin derivatives. Finally, a titration experiment with PNA and a complex formed by a heptakis lactose beta-cyclodextrin derivative with sodium 2-naphthalenesulfonate showed the formation of a soluble cross-linked complex with stronger affinity constant and higher stoichiometry than those observed for the complex formation of PNA with the same heptakis-lactose beta-cyclodextrin derivative, suggesting the formation of a three component complex.
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Ni J, Singh S, Wang LX. Improved preparation of perallylated cyclodextrins: facile synthesis of cyclodextrin-based polycationic and polyanionic compounds. Carbohydr Res 2002; 337:217-20. [PMID: 11844491 DOI: 10.1016/s0008-6215(01)00303-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
An improved procedure for the perallylation of cyclodextrins allowed the preparation of O-perallylated alpha-, beta-, and gamma-cyclodextrins in 89, 91, and 88% yields, respectively. These were converted into two cyclodextrin-based functionalized compounds, the polycationic heptakis[2,3,6-tri-O-(6-amino-3-thiahexyl)]-beta-cyclodextrin hydrochloride (3), and the polyanionic heptakis[2,3,6-tri-O-(sodium 5-carboxyl-3-thiapentyl)]-beta-cyclodextrin (4), a potential inhibitor of HIV-1 replication.
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Affiliation(s)
- Jiahong Ni
- Institute of Human Virology, University of Maryland Biotechnology Institute, University of Maryland, 725 W. Lombard Street, Baltimore, MD 21201, USA
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Fulton DA, Stoddart JF. Synthesis of cyclodextrin-based carbohydrate clusters by photoaddition reactions. J Org Chem 2001; 66:8309-19. [PMID: 11735508 DOI: 10.1021/jo010705z] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The syntheses of homogeneous cyclodextrin-based carbohydrate clusters, persubstituted with beta-D-thioglucosyl or D-thiolactosyl residues on either (a) the primary face, (b) the secondary face, or (c) both the primary and the secondary faces of their cyclodextrin tori, are described. The key step in the synthetic methodology, namely the attachment of the carbohydrate residues to the cyclodextrin torus, proceeds in moderate-good yields (42-70%) by the photoaddition of thiol groups, positioned at the anomeric centers of the carbohydrate residues, to allyl ether functions on the cyclodextrins. Facile removal of protecting groups then affords the free cluster compounds. Extensive 1-D and 2-D NMR spectroscopic investigations were performed on these compounds to determine their structures and establish their homogeneities, and a brief computer molecular modeling study allowed estimates of the dimensions of the clusters to be determined.
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Affiliation(s)
- D A Fulton
- Department of Chemistry and Biochemistry, University of California, Los Angeles 90095-1569, USA
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