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George A, Jayaraman N. Carbohydrate-Functionalized Anthracene Carboximides as Multivalent Ligands and Bio-Imaging Agents. Chemistry 2024; 30:e202400941. [PMID: 38700909 DOI: 10.1002/chem.202400941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Indexed: 05/23/2024]
Abstract
Anthracene carboximides (ACIs) conjugated with gluco-, galacto- and mannopyranosides are synthesized, by glycosylation of N-hydroxyethylanthracene carboximide acceptor with glycosyl donors. Glycoconjugation of anthracene carboximide increases the aq. solubility by more than 3-fold. The glycoconjugates display red-shifted absorption and emission, as compared to anthracene. Large Stokes shift (λabs/λem=445/525 nm) and high fluorescence quantum yields (Φ) of 0.86 and 0.5 occur in THF and water, respectively. The ACI-glycosides undergo facile photodimerization in aqueous solutions, leading to the formation of the head-to-tail dimer, as a mixture of syn and anti-isomers. Solution phase and solid-state characterizations by dynamic light scattering (DLS), microscopic imaging by atomic force (AFM) and transmission electron (TEM) microscopies reveal self-assembled vesicle structures of ACI glycosides. These self-assembled structures act as multivalent glycoclusters for ligand-specific lectin binding, as evidenced by the binding of Man-ACI to Con A, by fluorescence and turbidity assays. The conjugates do not show cellular cytotoxicity (IC50) till concentrations of 50 μM with HeLa and HepG2 cell lines and are cell-permeable, showing strong fluorescence inside the cells. These properties enable the glycoconjugates to be used in cell imaging. The non-selective cellular uptake of the glycoconjugates suggests a passive diffusion through the membrane.
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Affiliation(s)
- Anne George
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560012, India
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2
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Saxena S, Kandasubramanian B. Glycopolymers in molecular recognition, biomimicking and glycotechnology: a review. INT J POLYM MATER PO 2021. [DOI: 10.1080/00914037.2021.1900181] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Shatakshi Saxena
- Centre for Converging Technologies, University of Rajasthan, Jaipur, India
| | - Balasubramanian Kandasubramanian
- Department of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology (DU), Ministry of Defence, Pune, India
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Restuccia A, Hudalla GA. Tuning carbohydrate density enhances protein binding and inhibition by glycosylated β-sheet peptide nanofibers. Biomater Sci 2018; 6:2327-2335. [DOI: 10.1039/c8bm00533h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The efficacy of glycosylated β-sheet peptide nanofibers for inhibiting carbohydrate-binding proteins can be increased by tuning carbohydrate density to maximize protein binding affinity.
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Affiliation(s)
- Antonietta Restuccia
- J. Crayton Pruitt Family Department of Biomedical Engineering
- University of Florida
- Gainesville
- USA 32611
| | - Gregory A. Hudalla
- J. Crayton Pruitt Family Department of Biomedical Engineering
- University of Florida
- Gainesville
- USA 32611
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Delbianco M, Bharate P, Varela-Aramburu S, Seeberger PH. Carbohydrates in Supramolecular Chemistry. Chem Rev 2015; 116:1693-752. [PMID: 26702928 DOI: 10.1021/acs.chemrev.5b00516] [Citation(s) in RCA: 191] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Carbohydrates are involved in a variety of biological processes. The ability of sugars to form a large number of hydrogen bonds has made them important components for supramolecular chemistry. We discuss recent advances in the use of carbohydrates in supramolecular chemistry and reveal that carbohydrates are useful building blocks for the stabilization of complex architectures. Systems are presented according to the scaffold that supports the glyco-conjugate: organic macrocycles, dendrimers, nanomaterials, and polymers are considered. Glyco-conjugates can form host-guest complexes, and can self-assemble by using carbohydrate-carbohydrate interactions and other weak interactions such as π-π interactions. Finally, complex supramolecular architectures based on carbohydrate-protein interactions are discussed.
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Affiliation(s)
- Martina Delbianco
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces , Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Priya Bharate
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces , Am Mühlenberg 1, 14476 Potsdam, Germany.,Institute of Chemistry and Biochemistry, Freie Universität Berlin , Arnimallee 22, 14195 Berlin, Germany
| | - Silvia Varela-Aramburu
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces , Am Mühlenberg 1, 14476 Potsdam, Germany.,Institute of Chemistry and Biochemistry, Freie Universität Berlin , Arnimallee 22, 14195 Berlin, Germany
| | - Peter H Seeberger
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces , Am Mühlenberg 1, 14476 Potsdam, Germany.,Institute of Chemistry and Biochemistry, Freie Universität Berlin , Arnimallee 22, 14195 Berlin, Germany
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Esue O, Xie AX, Kamerzell TJ, Patapoff TW. Thermodynamic and structural characterization of an antibody gel. MAbs 2013; 5:323-34. [PMID: 23425660 DOI: 10.4161/mabs.23183] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Although extensively studied, protein-protein interactions remain highly elusive and are of increasing interest in drug development. We show the assembly of a monoclonal antibody, using multivalent carboxylate ions, into highly-ordered structures. While the presence and function of similar structures in vivo are not known, the results may present a possible unexplored area of antibody structure-function relationships. Using a variety of tools (e.g., mechanical rheology, electron microscopy, isothermal calorimetry, Fourier transform infrared spectroscopy), we characterized the physical, biochemical, and thermodynamic properties of these structures and found that citrate may interact directly with the amino acid residue histidine, after which the individual protein units assemble into a filamentous network gel exhibiting high elasticity and interfilament interactions. Citrate interacts exothermically with the monoclonal antibody with an association constant that is highly dependent on solution pH and temperature. Secondary structure analysis also reveals involvement of hydrophobic and aromatic residues.
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Affiliation(s)
- Osigwe Esue
- Pharmaceutical Development, Genentech, South San Francisco, CA, USA.
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Chabre YM, Roy R. Multivalent glycoconjugate syntheses and applications using aromatic scaffolds. Chem Soc Rev 2013; 42:4657-708. [PMID: 23400414 DOI: 10.1039/c3cs35483k] [Citation(s) in RCA: 200] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Glycan-protein interactions are of utmost importance in several biological phenomena. Although the variety of carbohydrate residues in mammalian cells is limited to less than a dozen different sugars, their spatial topographical presentation in what is now associated as the "glycocodes" provides the fundamental keys for specific and high affinity "lock-in" recognition events associated with a wide range of pathologies. Toward deciphering our understanding of these glycocodes, chemists have developed new creative tools that included dendrimer chemistry in order to provide monodisperse multivalent glycoconjugates. This review provides a survey of the numerous aromatic architectures generated for the multivalent presentation of relevant carbohydrates using covalent attachment or supramolecular self-assemblies. The basic concepts toward their controlled syntheses will be described using modern synthetic procedures with a particular emphasis on powerful organometallic methodologies. The large variety of dendritic aromatic scaffolds, together with a brief survey of their unique biophysical and biological properties will be critically reviewed. The distinctiveness of the resulting multivalent glycoarchitectures, encompassing glycoclusters, glycodendrimers and molecularly defined self-assemblies, in forming well organized cross-linked lattices with multivalent carbohydrate binding proteins (lectins) together with their photophysical, medical, and imaging properties will also be briefly highlighted. The topic will be presented in increasing order of aromatic backbone complexities and will end with fullerenes together with self-assembled nanostructures, thus complementing the various scaffolds described in this special thematic issue dedicated to multivalent glycoscience.
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Affiliation(s)
- Yoann M Chabre
- Pharmaqam - Department of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Succ. Centre-ville, Montréal, Québec, Canada H3C 3P8
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Cloninger MJ, Bilgiçer B, Li L, Mangold SL, Phillips ST, Wolfenden ML. Multivalency. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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8
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Murthy BN, Zeile S, Nambiar M, Nussio MR, Gibson CT, Shapter JG, Jayaraman N, Voelcker NH. Self assembly of bivalent glycolipids on single walled carbon nanotubes and their specific molecular recognition properties. RSC Adv 2012. [DOI: 10.1039/c2ra01192a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Deniaud D, Julienne K, Gouin SG. Insights in the rational design of synthetic multivalent glycoconjugates as lectin ligands. Org Biomol Chem 2011; 9:966-79. [DOI: 10.1039/c0ob00389a] [Citation(s) in RCA: 124] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: an update for the period 2005-2006. MASS SPECTROMETRY REVIEWS 2011; 30:1-100. [PMID: 20222147 DOI: 10.1002/mas.20265] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This review is the fourth update of the original review, 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 2006. The review covers fundamental studies, fragmentation of carbohydrate ions, method developments, and applications of the technique to the analysis of different types of carbohydrate. Specific compound classes that are covered include carbohydrate polymers from plants, N- and O-linked glycans from glycoproteins, glycated proteins, glycolipids from bacteria, glycosides, and various other natural products. There is a short section on the use of MALDI-TOF mass spectrometry for the study of enzymes involved in glycan processing, a section on industrial processes, particularly the development of biopharmaceuticals and a section on the use of MALDI-MS to monitor products of chemical synthesis of carbohydrates. Large carbohydrate-protein complexes and glycodendrimers are highlighted in this final section.
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Affiliation(s)
- David J Harvey
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford OX1 3QU, UK.
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Labieniec M, Watala C. Use of poly(amido)amine dendrimers in prevention of early non-enzymatic modifications of biomacromolecules. Biochimie 2010; 92:1296-305. [DOI: 10.1016/j.biochi.2010.06.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2009] [Accepted: 06/03/2010] [Indexed: 10/19/2022]
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12
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Peptide and glycopeptide dendrimers and analogous dendrimeric structures and their biomedical applications. Amino Acids 2010; 40:301-70. [DOI: 10.1007/s00726-010-0707-z] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Accepted: 07/15/2010] [Indexed: 02/08/2023]
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Ruff Y, Buhler E, Candau SJ, Kesselman E, Talmon Y, Lehn JM. Glycodynamers: Dynamic Polymers Bearing Oligosaccharides Residues − Generation, Structure, Physicochemical, Component Exchange, and Lectin Binding Properties. J Am Chem Soc 2010; 132:2573-84. [DOI: 10.1021/ja9082733] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yves Ruff
- Laboratoire de Chimie Supramoléculaire, ISIS, Université de Strasbourg, Allée Gaspard Monge, 67000 Strasbourg, France, Laboratoire Matière et Systèmes Complexes (MSC), UMR CNRS 7057, Bâtiment Condorcet, Université Paris Diderot-Paris 7, 75205 Paris cedex 13, France, and Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Eric Buhler
- Laboratoire de Chimie Supramoléculaire, ISIS, Université de Strasbourg, Allée Gaspard Monge, 67000 Strasbourg, France, Laboratoire Matière et Systèmes Complexes (MSC), UMR CNRS 7057, Bâtiment Condorcet, Université Paris Diderot-Paris 7, 75205 Paris cedex 13, France, and Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Sauveur-Jean Candau
- Laboratoire de Chimie Supramoléculaire, ISIS, Université de Strasbourg, Allée Gaspard Monge, 67000 Strasbourg, France, Laboratoire Matière et Systèmes Complexes (MSC), UMR CNRS 7057, Bâtiment Condorcet, Université Paris Diderot-Paris 7, 75205 Paris cedex 13, France, and Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Ellina Kesselman
- Laboratoire de Chimie Supramoléculaire, ISIS, Université de Strasbourg, Allée Gaspard Monge, 67000 Strasbourg, France, Laboratoire Matière et Systèmes Complexes (MSC), UMR CNRS 7057, Bâtiment Condorcet, Université Paris Diderot-Paris 7, 75205 Paris cedex 13, France, and Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Yeshayahu Talmon
- Laboratoire de Chimie Supramoléculaire, ISIS, Université de Strasbourg, Allée Gaspard Monge, 67000 Strasbourg, France, Laboratoire Matière et Systèmes Complexes (MSC), UMR CNRS 7057, Bâtiment Condorcet, Université Paris Diderot-Paris 7, 75205 Paris cedex 13, France, and Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Jean-Marie Lehn
- Laboratoire de Chimie Supramoléculaire, ISIS, Université de Strasbourg, Allée Gaspard Monge, 67000 Strasbourg, France, Laboratoire Matière et Systèmes Complexes (MSC), UMR CNRS 7057, Bâtiment Condorcet, Université Paris Diderot-Paris 7, 75205 Paris cedex 13, France, and Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa 32000, Israel
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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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15
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Facile synthesis of cyclopeptide-centered multivalent glycoclusters with ‘click chemistry’ and molecular recognition study by surface plasmon resonance. Bioorg Med Chem Lett 2009; 19:3775-8. [DOI: 10.1016/j.bmcl.2009.04.090] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 04/19/2009] [Accepted: 04/21/2009] [Indexed: 11/16/2022]
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16
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Kolomiets E, Swiderska M, Kadam R, Johansson EM, Jaeger KE, Darbre T, Reymond JL. Glycopeptide Dendrimers with High Affinity for the Fucose-Binding Lectin LecB fromPseudomonas aeruginosa. ChemMedChem 2009; 4:562-9. [DOI: 10.1002/cmdc.200800380] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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17
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Santore MM, Zhang J, Srivastava S, Rotello VM. Beyond molecular recognition: using a repulsive field to tune interfacial valency and binding specificity between adhesive surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:84-96. [PMID: 19209443 DOI: 10.1021/la802554s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Surface-bound biomolecular fragments enable "smart" materials to recognize cells and other particles in applications ranging from tissue engineering and medical diagnostics to colloidal and nanoparticle assembly. Such smart surfaces are, however, limited in their design to biomolecular selectivity. This feature article demonstrates, using a completely nonbiological model system, how specificity can be achieved for particle (and cell) binding, employing surface designs where immobilized nanoscale adhesion elements are entirely nonselective. Fundamental principles are illustrated by a model experimental system where 11 nm cationic nanoparticles on a planar negative silica surface interact with flowing negative silica microspheres having 1.0 and 0.5 microm diameters. In these systems, the interfacial valency, defined as the number of cross-bonds needed to capture flowing particles, is tunable through ionic strength, which alters the range of the background repulsion and therefore the effective binding strength of the adhesive elements themselves. At high ionic strengths where long-range electrostatic repulsions are screened, single surface-bound nanoparticles capture microspheres, defining the univalent regime. At low ionic strengths, competing repulsions weaken the effective nanoparticle adhesion so that multiple nanoparticles are needed for microparticle capture. This article discusses important features of the univalent regime and then illustrates how multivalency produces interfacial-scale selectivity. The arguments are then generalized, providing a possible explanation for highly specific cell binding in nature, despite the degeneracy of adhesion molecules and cell types. The mechanism for the valency-related selectivity is further developed in the context of selective flocculation in the colloidal literature. Finally, results for multivalent binding are contrasted with the current thinking for interfacial design and the presentation of adhesion moieties on engineered surfaces.
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Affiliation(s)
- Maria M Santore
- Department of Polymer Science and Engineering and Department of Chemistry, UniVersity ofMassachusetts, Amherst, Massachusetts 01003, USA.
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18
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Jayaraman N. Multivalent ligand presentation as a central concept to study intricate carbohydrate–protein interactions. Chem Soc Rev 2009; 38:3463-83. [DOI: 10.1039/b815961k] [Citation(s) in RCA: 185] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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19
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Architectures of Multivalent Glycomimetics for Probing Carbohydrate–Lectin Interactions. GLYCOSCIENCE AND MICROBIAL ADHESION 2009; 288:183-65. [DOI: 10.1007/128_2008_30] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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20
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Rai P, Vance D, Poon V, Mogridge J, Kane RS. Stable and potent polyvalent anthrax toxin inhibitors: raft-inspired domain formation in liposomes that contain PEGylated lipids. Chemistry 2008; 14:7748-51. [PMID: 18666271 DOI: 10.1002/chem.200801097] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Prakash Rai
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
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21
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Klajnert B, Appelhans D, Komber H, Morgner N, Schwarz S, Richter S, Brutschy B, Ionov M, Tonkikh A, Bryszewska M, Voit B. The Influence of Densely Organized Maltose Shells on the Biological Properties of Poly(propylene imine) Dendrimers: New Effects Dependent on Hydrogen Bonding. Chemistry 2008; 14:7030-41. [DOI: 10.1002/chem.200800342] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Ruff Y, Lehn JM. Glycodynamers: Fluorescent Dynamic Analogues of Polysaccharides. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200703490] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Ruff Y, Lehn JM. Glycodynamers: Fluorescent Dynamic Analogues of Polysaccharides. Angew Chem Int Ed Engl 2008; 47:3556-9. [DOI: 10.1002/anie.200703490] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wolfenden ML, Cloninger MJ. Carbohydrate-Functionalized Dendrimers To Investigate the Predictable Tunability of Multivalent Interactions. Bioconjug Chem 2006; 17:958-66. [PMID: 16848403 DOI: 10.1021/bc060107x] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Multivalent protein-carbohydrate interactions mediate a wide variety of intercellular recognition processes with high selectivity and specificity. Many synthetic multivalent molecules have been designed to mimic and to inhibit these processes. Using carbohydrate functionalized dendrimers, our goal is to devise a system where the binding activity and the degree of protein clustering induced by the glycopolymer can be readily attenuated. In this paper, dendrimers were functionalized with mixtures of mannose, glucose, and galactose. Their association with concanavalin A was studied using precipitation and hemagglutination assays. With less idealized systems where the association was not optimized, mixtures of low- and high-affinity ligands caused smaller than the theoretically determined differences in binding activity, although linear binding trends were observed. When systems were optimized so that high-affinity binding was achieved, then mixing low- and high-affinity ligands on the dendrimer's surface showed a predictable trend for lectin binding.
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Affiliation(s)
- Mark L Wolfenden
- Department of Chemistry and Biochemistry and Center for Bioinspired Nanomaterials, Montana State University, 108 Gaines Hall, Bozeman, Montana 59717, USA
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26
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Murthy BN, Voelcker NH, Jayaraman N. Evaluation of α-d-mannopyranoside glycolipid micelles–lectin interactions by surface plasmon resonance method. Glycobiology 2006; 16:822-32. [PMID: 16782825 DOI: 10.1093/glycob/cwl014] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
It is established that achieving higher binding affinities in carbohydrate-protein interactions requires multivalent presentations of the sugar ligands at the receptor binding site. Several inhibition, calorimetric, mass balance, and other studies have reiterated the beneficial effects of molecular level clustering of the sugar ligands for tight binding to the receptors. We have undertaken an effort to study the multivalent effects involving larger assemblies, represented by micelles, and their lectin interactions. The micelles were constituted with monomer bearing one- or two-sugar moieties at the monomolecular level and with varying the distances between the sugar moieties. Micellar aggregation studies and dynamic light scattering (DLS) studies afforded details of the aggregation numbers and the hydrodynamic diameters of various glycolipid (GL) micelles. The GL micelles were used as analytes of surface plasmon resonance (SPR) experiments on a lectin concanavalin A (Con A)-immobilized surface. SPR studies of the micelle-lectin interactions demonstrate that the ligand-receptor binding can be fit into the bivalent analyte model of interaction. Furthermore, micelles formed from two-sugar containing GLs are able to elicit favorable kinetic association rate constants in comparison to the micelles constituted with one-sugar containing GLs. The kinetic rate constants across the micelles and the effect of the sugar valencies in the GLs are discussed.
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27
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Jain KK. Nanoparticles as targeting ligands. Trends Biotechnol 2006; 24:143-5. [PMID: 16488033 DOI: 10.1016/j.tibtech.2006.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Revised: 01/27/2006] [Accepted: 02/06/2006] [Indexed: 12/22/2022]
Abstract
A recently published technique enables the attachment of small molecules to nanoparticles for improved targeting of nanomaterials. This new methodology has been compared with some of the other nanoparticle-based techniques for target discovery and found to be more versatile and specific. This approach has potential for high-throughput drug discovery, improved drug delivery and linking of diagnostics to therapeutics for the development of personalized medicines.
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Affiliation(s)
- K K Jain
- Jain PharmaBiotech, Blaesiring 7, CH-4057 Basel, Switzerland.
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