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Das A, Ray D, Banik BK. Tellurium in carbohydrate synthesis. PHYSICAL SCIENCES REVIEWS 2022. [DOI: 10.1515/psr-2021-0109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this article, we discuss about the influence of tellurium in carbohydrate synthesis. Mainly the chapter focuses on the importance of the tellurium during the synthesis of glycosides and during the oxidation of glucose.
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Affiliation(s)
- Aparna Das
- Department of Mathematics and Natural Sciences, College of Sciences and Human Studies , Prince Mohammad Bin Fahd University , Al Khobar 31952 , Kingdom of Saudi Arabia
| | - Devalina Ray
- Amity Institute of Biotechnology, Amity University , Noida 201313 , UP , India
| | - Bimal Krishna Banik
- Department of Mathematics and Natural Sciences, College of Sciences and Human Studies , Prince Mohammad Bin Fahd University , Al Khobar 31952 , Kingdom of Saudi Arabia
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2
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Hartweg M, Jiang Y, Yilmaz G, Jarvis CM, Nguyen HVT, Primo GA, Monaco A, Beyer VP, Chen KK, Mohapatra S, Axelrod S, Gómez-Bombarelli R, Kiessling LL, Becer CR, Johnson JA. Synthetic Glycomacromolecules of Defined Valency, Absolute Configuration, and Topology Distinguish between Human Lectins. JACS AU 2021; 1:1621-1630. [PMID: 34723265 PMCID: PMC8549053 DOI: 10.1021/jacsau.1c00255] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Indexed: 06/13/2023]
Abstract
Carbohydrate-binding proteins (lectins) play vital roles in cell recognition and signaling, including pathogen binding and innate immunity. Thus, targeting lectins, especially those on the surface of immune cells, could advance immunology and drug discovery. Lectins are typically oligomeric; therefore, many of the most potent ligands are multivalent. An effective strategy for lectin targeting is to display multiple copies of a single glycan epitope on a polymer backbone; however, a drawback to such multivalent ligands is they cannot distinguish between lectins that share monosaccharide binding selectivity (e.g., mannose-binding lectins) as they often lack molecular precision. Here, we describe the development of an iterative exponential growth (IEG) synthetic strategy that enables facile access to synthetic glycomacromolecules with precisely defined and tunable sizes up to 22.5 kDa, compositions, topologies, and absolute configurations. Twelve discrete mannosylated "glyco-IEGmers" are synthesized and screened for binding to a panel of mannoside-binding immune lectins (DC-SIGN, DC-SIGNR, MBL, SP-D, langerin, dectin-2, mincle, and DEC-205). In many cases, the glyco-IEGmers had distinct length, stereochemistry, and topology-dependent lectin-binding preferences. To understand these differences, we used molecular dynamics and density functional theory simulations of octameric glyco-IEGmers, which revealed dramatic effects of glyco-IEGmer stereochemistry and topology on solution structure and reveal an interplay between conformational diversity and chiral recognition in selective lectin binding. Ligand function also could be controlled by chemical substitution: by tuning the side chains of glyco-IEGmers that bind DC-SIGN, we could alter their cellular trafficking through alteration of their aggregation state. These results highlight the power of precision synthetic oligomer/polymer synthesis for selective biological targeting, motivating the development of next-generation glycomacromolecules tailored for specific immunological or other therapeutic applications.
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Affiliation(s)
- Manuel Hartweg
- Department
of Chemistry, Massachusetts Institute of
Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Yivan Jiang
- Department
of Chemistry, Massachusetts Institute of
Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Gokhan Yilmaz
- School
of Pharmacy, University of Nottingham, Nottingham NG7 2RD, United Kingdom
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Cassie M. Jarvis
- Department
of Chemistry, Massachusetts Institute of
Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Hung V.-T. Nguyen
- Department
of Chemistry, Massachusetts Institute of
Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Gastón A. Primo
- School
of Engineering and Materials Science, Queen
Mary University of London, London E1 4NS, United Kingdom
| | - Alessandra Monaco
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Valentin P. Beyer
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Kathleen K. Chen
- Department
of Chemistry, Massachusetts Institute of
Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Somesh Mohapatra
- Department
of Materials Science and Engineering, Massachusetts
Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Simon Axelrod
- Department
of Materials Science and Engineering, Massachusetts
Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Rafael Gómez-Bombarelli
- Department
of Materials Science and Engineering, Massachusetts
Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Laura L. Kiessling
- Department
of Chemistry, Massachusetts Institute of
Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - C. Remzi Becer
- School
of Engineering and Materials Science, Queen
Mary University of London, London E1 4NS, United Kingdom
- Department
of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Jeremiah A. Johnson
- Department
of Chemistry, Massachusetts Institute of
Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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3
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Yan X, Liu B, Ru G, Feng J. Preparation and characterization of curdlan with unique single-helical conformation and its assembly with Congo Red. Carbohydr Polym 2021; 263:117985. [PMID: 33858578 DOI: 10.1016/j.carbpol.2021.117985] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 03/18/2021] [Accepted: 03/22/2021] [Indexed: 12/17/2022]
Abstract
Elucidating the structure-activity relationship of curdlan is hampered by a lack of characterization with unique specific conformations (i.e., single- or triple-helix). In this study, single-helical curdlan is generated in dilute NaOH solutions at 35-50 °C, and characterized with NMR, SAXS, and GPC. The conformational transition from coil to single-helix and the intramolecular hydrogen bond interaction are explored using NMR. It is found that the two aforementioned types of curdlan interact with Congo Red in very different ways. Single-helical curdlan can encapsulate Congo Red to form a stable, supramolecular dye assembly, which is demonstrated by the shortest distance between the H3 of curdlan and the phenyl groups of Congo Red, and also the same self-diffusion coefficients of Congo Red and curdlan. In contrast, random-coil curdlan interacts weakly with Congo Red and cannot enwrap it. This study offers insight into the specific structure-activity relationship of beta-(1,3)-glucans.
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Affiliation(s)
- Xiaoshuang Yan
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China
| | - Biaolan Liu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, PR China
| | - Geying Ru
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, PR China.
| | - Jiwen Feng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, PR China
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4
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Castro E, Hernandez Garcia A, Zavala G, Echegoyen L. Fullerenes in Biology and Medicine. J Mater Chem B 2017; 5:6523-6535. [PMID: 29225883 PMCID: PMC5716489 DOI: 10.1039/c7tb00855d] [Citation(s) in RCA: 173] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Fullerenes and related carbon based derivatives have shown a growing relevance in biology and medicine, mainly due to the unique electronic and structural properties that make them excellent candidates for multiple functionalization. This review focuses on the most recent developments of fullerene derivatives for different biological applications.
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Affiliation(s)
- Edison Castro
- Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
| | - Andrea Hernandez Garcia
- Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
| | - Gerardo Zavala
- Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
| | - Luis Echegoyen
- Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, TX, USA
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Bhattarai JK, Tan YH, Pandey B, Fujikawa K, Demchenko AV, Stine KJ. Electrochemical Impedance Spectroscopy Study of Concanavalin A Binding to Self-Assembled Monolayers of Mannosides on Gold Wire Electrodes. J Electroanal Chem (Lausanne) 2016; 780:311-320. [PMID: 28413372 DOI: 10.1016/j.jelechem.2016.09.045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The interactions of the lectin Concanavalin A (Con A) with self-assembled monolayers (SAMs) of thiolated mono-, di-, and tri-mannosides were studied on the surface of gold wires using electrochemical impedance spectroscopy (EIS). The SAMs of mannosides were prepared either pure or along with thiolated triethylene glycol (TEG) at different molar ratios (1:1, 1:2, 1:4, 1:9, and 1:19) to better understand and optimize the interaction conditions. The charge-transfer resistance of the [Fe(CN)6]3-/4- redox probe was compared before and after the interaction at different concentrations of Con A to determine the equilibrium dissociation constant (Kd) and limit of detection (LOD). Values of Kd were found in the nanomolar range showing multivalent interactions between mannosides and Con A, and LOD was found ranging from 4-13 nM depending on the type of mannoside SAM used. Analysis using the Hill equation suggests negative cooperativity in the binding behavior. Peanut agglutinin was used as a negative control, and cyclic voltammetry was used to further support the experiments. We have found that neither the pure nor the widely dispersed monolayers of mannosides provide the conditions for optimal binding of Con A. The binding of Con A to these SAMs is sensitive to the molar ratio of the mannoside used to prepare the SAM and to the structure of the mannoside. A simple cleaning method has also been shown to regenerate the used gold wire electrodes. The results from these experiments contribute to the development of simple, cheap, selective, and sensitive EIS-based bioassays, especially for lectin-carbohydrate interactions.
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Affiliation(s)
- Jay K Bhattarai
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, Saint Louis, MO 63121, USA
| | - Yih Horng Tan
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, Saint Louis, MO 63121, USA
| | - Binod Pandey
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, Saint Louis, MO 63121, USA
| | - Kohki Fujikawa
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, Saint Louis, MO 63121, USA
| | - Alexei V Demchenko
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, Saint Louis, MO 63121, USA
| | - Keith J Stine
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, Saint Louis, MO 63121, USA
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6
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Synthesis, characterization and polymerization of novel sugars based on methacrylate. IRANIAN POLYMER JOURNAL 2016. [DOI: 10.1007/s13726-016-0437-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Chen N, Yu ZH, Zhou D, Hu XL, Zang Y, He XP, Li J, Xie J. N-Oxyamide-linked glycoglycerolipid coated AuNPs for receptor-targeting imaging and drug delivery. Chem Commun (Camb) 2016; 52:2284-7. [DOI: 10.1039/c5cc09749e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We report the construction of gold glyconanoparticles coated by N-oxyamide-linked glycoglycerolipids for receptor-targeting imaging and drug delivery.
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Affiliation(s)
- Na Chen
- PPSM
- ENS Cachan
- CNRS
- Université Paris-Saclay
- Cachan
| | - Zhi-Hao Yu
- Key Laboratory for Advanced Materials & Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- PR China
| | - Dan Zhou
- Key Laboratory for Advanced Materials & Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- PR China
| | - Xi-Le Hu
- Key Laboratory for Advanced Materials & Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- PR China
| | - Yi Zang
- National Center for Drug Screening
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica (SIMM)
- Chinese Academy of Sciences (CAS)
- Shanghai 201203
| | - Xiao-Peng He
- Key Laboratory for Advanced Materials & Institute of Fine Chemicals
- East China University of Science and Technology
- Shanghai 200237
- PR China
| | - Jia Li
- National Center for Drug Screening
- State Key Laboratory of Drug Research
- Shanghai Institute of Materia Medica (SIMM)
- Chinese Academy of Sciences (CAS)
- Shanghai 201203
| | - Juan Xie
- PPSM
- ENS Cachan
- CNRS
- Université Paris-Saclay
- Cachan
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Abstract
A synthetic study on the creation of a bivalent, ROMP capable monomer has the ability to be polymerized into the corresponding neo-glycopolymer mimetic of the surface glycans on gp120 envelope spike of the HIV virus. In our approach, we have developed a new strategy for orthogonally attaching both the terminal Manα1-2Man disaccharide unit of the D1 arm of Man9GlcNAc2 of HIV gp120 and the terminal Manα1-2 unit of its D2 arm to a bivalent scaffold to produce the corresponding polymerizable monomer. The Manα1-2 saccharide moieties were assembled using a nickel catalyst, Ni(4-F-PhCN)4(OTf)2, to activate trihaloacetimidate donors under mild and operationally simple procedure.
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Paleček E, Tkáč J, Bartošík M, Bertók T, Ostatná V, Paleček J. Electrochemistry of nonconjugated proteins and glycoproteins. Toward sensors for biomedicine and glycomics. Chem Rev 2015; 115:2045-108. [PMID: 25659975 PMCID: PMC4360380 DOI: 10.1021/cr500279h] [Citation(s) in RCA: 215] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Indexed: 02/07/2023]
Affiliation(s)
- Emil Paleček
- Institute
of Biophysics Academy of Science of the Czech Republic, v.v.i., Královopolská
135, 612 65 Brno, Czech Republic
| | - Jan Tkáč
- Institute
of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Martin Bartošík
- Regional
Centre for Applied Molecular Oncology, Masaryk
Memorial Cancer Institute, Žlutý kopec 7, 656 53 Brno, Czech Republic
| | - Tomáš Bertók
- Institute
of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
| | - Veronika Ostatná
- Institute
of Biophysics Academy of Science of the Czech Republic, v.v.i., Královopolská
135, 612 65 Brno, Czech Republic
| | - Jan Paleček
- Central
European Institute of Technology, Masaryk
University, Kamenice
5, 625 00 Brno, Czech Republic
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10
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Rusu VH, Baron R, Lins RD. PITOMBA: Parameter Interface for Oligosaccharide Molecules Based on Atoms. J Chem Theory Comput 2014; 10:5068-80. [DOI: 10.1021/ct500455u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Victor H. Rusu
- Department
of Medicinal Chemistry, College of Pharmacy, and The Henry Eyring
Center for Theoretical Chemistry, The University of Utah, Salt Lake City, Utah 84112-5820, United States
- Departamento
de Química Fundamental, Universidade Federal de Pernambuco, Cidade Universitária, Recife, PE 50740-560, Brazil
| | - Riccardo Baron
- Department
of Medicinal Chemistry, College of Pharmacy, and The Henry Eyring
Center for Theoretical Chemistry, The University of Utah, Salt Lake City, Utah 84112-5820, United States
| | - Roberto D. Lins
- Departamento
de Química Fundamental, Universidade Federal de Pernambuco, Cidade Universitária, Recife, PE 50740-560, Brazil
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Yilmaz G, Becer CR. Glycopolymer code based on well-defined glycopolymers or glyconanomaterials and their biomolecular recognition. Front Bioeng Biotechnol 2014; 2:39. [PMID: 25353022 PMCID: PMC4196633 DOI: 10.3389/fbioe.2014.00039] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 09/15/2014] [Indexed: 11/13/2022] Open
Abstract
Advances in the glycopolymer technology have allowed the preparation of more complex and well-defined glycopolymers/particles with several architectures from linear to globular structures (such as micelles, dendrimers, and nanogels). In the last decade, functionalized self-assembled/decided nano-objects and scaffolds containing glycopolymers were designed to develop many biological and biomedical applications in diseases treatments such as pathogen detection, inhibitors of toxins, and lectin-based biosensors. These studies will facilitate the understanding and investigation of the sugar code on the carbohydrate-lectin interactions, which are significantly influenced by the glycopolymer architecture, valency, size, and density of binding elements. In this context, these advanced and selected glycopolymers/particles showing specific interactions with various lectins are highlighted.
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Affiliation(s)
- Gokhan Yilmaz
- Department of Chemistry, University of Warwick, Coventry, UK
- Department of Basic Sciences, Turkish Military Academy, Ankara, Turkey
| | - C. Remzi Becer
- School of Engineering and Materials Science, Queen Mary University of London, London, UK
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12
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Danial M, Klok HA. Polymeric anti-HIV therapeutics. Macromol Biosci 2014; 15:9-35. [PMID: 25185484 DOI: 10.1002/mabi.201400298] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 07/14/2014] [Indexed: 11/09/2022]
Abstract
The scope of this review is to highlight the application of polymer therapeutics in an effort to curb the transmission and infection of the human immunodeficiency virus (HIV). Following a description of the HIV life cycle, the use of approved antiretroviral drugs that inhibit critical steps in the HIV infection process is highlighted. After that, a comprehensive overview of the structure and inhibitory properties of polymeric anti-HIV therapeutic agents is presented. This overview will include inhibitors based on polysaccharides, synthetic polymers, dendritic polymers, polymer conjugates as well as polymeric DC-SIGN antagonists. The review will conclude with a section that discusses the applications of polymers and polymer conjugates as systemic and topical anti-HIV therapeutics.
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Affiliation(s)
- Maarten Danial
- École Polytechnique Fédérale de Lausanne (EPFL), Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères Bâtiment MXD, Station 12, Lausanne, CH-1015, Switzerland.
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13
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Nierengarten I, Nierengarten JF. Fullerene sugar balls: a new class of biologically active fullerene derivatives. Chem Asian J 2014; 9:1436-44. [PMID: 24678063 DOI: 10.1002/asia.201400133] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Indexed: 12/12/2022]
Abstract
Among the large variety of bioactive C60 derivatives, fullerene derivatives substituted with sugar residues, that is, glycofullerenes, are of particular interest. The sugar residues are not only solubilizing groups; their intrinsic biological properties also provide additional appealing features to the conjugates. The most recent advances in the synthesis and the biological applications of glycofullerenes are summarized in the present review article with special emphasis on globular glycofullerenes, that is, fullerene sugar balls, constructed on a hexa-substituted fullerene scaffold. The high local concentration of carbohydrates around the C60 core in fullerene sugar balls is perfectly suited to the binding of lectins through the "glycoside cluster effect", and these compounds are potential anti-adhesive agents against bacterial infection. Moreover, mannosylated fullerene sugar balls have shown antiviral activity in an Ebola pseudotyped infection model. Finally, when substituted with peripheral iminosugars, dramatic multivalent effects have been observed for glycosidase inhibition. These unexpected observations have been rationalized by the interplay of interactions involving the catalytic site of the enzyme and non-glycone binding sites with lectin-like abilities.
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Affiliation(s)
- Iwona Nierengarten
- Laboratoire de Chimie des Matériaux Moléculaires, Université de Strasbourg et CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux, 25 rue Becquerel, 67087 Strasbourg Cedex 2 (France)
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14
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Lian CM, Jiang LP, Liu DL. Synthesis and characterization of acetylated sept-d-glucopyranose carbamate as an oligosaccharide donor. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2013.10.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Thota VN, Brahmaiah M, Kulkarni SS. Synthesis of a C-Glycoside Analogue of β-Galactosyl Ceramide, a Potential HIV-1 Entry Inhibitor. J Org Chem 2013; 78:12082-9. [DOI: 10.1021/jo402115w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- V. Narasimharao Thota
- Department
of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Mula Brahmaiah
- Department
of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Suvarn S. Kulkarni
- Department
of Chemistry, Indian Institute of Technology Bombay, Mumbai 400076, India
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16
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Huang J, Zhang Q, Li GZ, Haddleton DM, Wallis R, Mitchell D, Heise A, Becer CR. Synthetic Glycopolypeptides as Potential Inhibitory Agents for Dendritic Cells and HIV-1 Trafficking. Macromol Rapid Commun 2013; 34:1542-6. [DOI: 10.1002/marc.201300439] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 07/09/2013] [Indexed: 01/10/2023]
Affiliation(s)
- Jin Huang
- School of Chemical Science; Dublin City University; Dublin; 9; Ireland
| | - Qiang Zhang
- Department of Chemistry; University of Warwick; Coventry; CV4 7AL; UK
| | - Guang-Zhao Li
- Department of Chemistry; University of Warwick; Coventry; CV4 7AL; UK
| | | | - Russell Wallis
- Department of Biochemistry; University of Leicester; Leicester; LE1 9HN; UK
| | - Daniel Mitchell
- Clinical Sciences Research Institute, Warwick Medical School; University of Warwick; Coventry; CV2 2DX; UK
| | - Andreas Heise
- School of Chemical Science; Dublin City University; Dublin; 9; Ireland
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17
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Fraser-Reid B, Lopez JC, Bernal-Albert P, Gomez AM, Uriel C, Ventura J. Glycosyl fluorides from n-pentenyl-related glycosyl donors — Application to glycosylation strategies. CAN J CHEM 2013. [DOI: 10.1139/cjc-2012-0285] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
n-Pentenyl glycosides (NPGs) and n-pentenyl orthoesters (NPOEs) have been transformed into glycosyl fluorides by a variety of methods. In the case of NPGs, Barluenga’s reagent, bis(pyridinium)iodonium(I)tetrafluoroborate (IPy2BF4), gives good yields of glycosyl fluorides when HF–pyridine complex is used as an additional fluoride source. NPOEs can be activated either by a combination of electrophilic iodonium (Barluenga’s reagent) and HBF4 or by the action of HF–pyridine complex. The ensuing glycosyl fluorides form a semiorthogonal pair of glycosyl donors when confronted with NPGs.
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Affiliation(s)
- Bert Fraser-Reid
- Natural Products and Glycotechnology Research Institute Inc. (NPG), 595F Weathersfield Road, Pittsboro, NC 27312, USA
| | - J. Cristobal Lopez
- Instituto de Química Orgánica General (IQOG-CSIC), Juan de la Cierva 3, Madrid 28006, Spain
| | - Paloma Bernal-Albert
- Instituto de Química Orgánica General (IQOG-CSIC), Juan de la Cierva 3, Madrid 28006, Spain
| | - Ana M. Gomez
- Instituto de Química Orgánica General (IQOG-CSIC), Juan de la Cierva 3, Madrid 28006, Spain
| | - Clara Uriel
- Instituto de Química Orgánica General (IQOG-CSIC), Juan de la Cierva 3, Madrid 28006, Spain
| | - Juan Ventura
- Instituto de Química Orgánica General (IQOG-CSIC), Juan de la Cierva 3, Madrid 28006, Spain
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18
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Freitas JC, Couto TR, Paulino AA, de Freitas Filho JR, Malvestiti I, Oliveira RA, Menezes PH. Stereoselective synthesis of pseudoglycosides catalyzed by TeCl4 under mild conditions. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.09.073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Freitas JC, Couto TR, Paulino AA, de Freitas Filho JR, Malvestiti I, Oliveira RA, Menezes PH. Stereoselective synthesis of pseudoglycosides catalyzed by TeCl4 under mild conditions. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.07.070] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Teas J, Irhimeh MR. Dietary algae and HIV/AIDS: proof of concept clinical data. JOURNAL OF APPLIED PHYCOLOGY 2012; 24:575-582. [PMID: 22661829 PMCID: PMC3354323 DOI: 10.1007/s10811-011-9766-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2011] [Revised: 12/09/2011] [Accepted: 12/09/2011] [Indexed: 05/10/2023]
Abstract
Dietary algae have been reported to decrease HIV viral fusion/entry and replication and increase immune response, suggesting that regular consumption of algae by people in Japan, Korea, and Chad could be an important factor in their relatively low HIV/AIDS rates. Five antiretroviral-naïve people with HIV (three females, two males; five African Americans) living in Columbia SC participated in the phase I study of acute toxicity. Subjects were randomly assigned to 5 g day(-1) brown seaweed (Undaria pinnatifida), Spirulina (Arthrospira platensis), or a combination of both. Endpoints included HIV viral load, complete blood count (CBC), metabolic and lipid panel, and quality of life questionnaire data. When no short-term toxicities were observed, six additional subjects (four females, two males; five African Americans, one Latina) were recruited to further evaluate short- and long-term toxicities (phase II). No adverse effects were observed for the 11 subjects in the phase I trial, and quality of life indicators improved at 3 weeks. No significant changes were observed in CBC, metabolic or lipid panel analyses. CD4 cells (milliliters) and HIV-1 viral load remained stable over the first 3-month phase II study period. One subject continued in the study for 13 months and had clinically significant improvement in CD4 (>100 cells mL(-1)) and decreased HIV viral load of 0.5 log(10). Our pilot data suggest that Undaria, Spirulina, and a combination of both were nontoxic and over time may improve clinical endpoints of HIV/AIDS.
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Affiliation(s)
- J. Teas
- University of South Carolina, Columbia, SC USA
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Becer CR. The Glycopolymer Code: Synthesis of Glycopolymers and Multivalent Carbohydrate-Lectin Interactions. Macromol Rapid Commun 2012; 33:742-52. [DOI: 10.1002/marc.201200055] [Citation(s) in RCA: 171] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 03/19/2012] [Indexed: 11/09/2022]
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Uriel C, Ventura J, Gómez AM, López JC, Fraser-Reid B. Unexpected stereocontrolled access to 1α,1'β-disaccharides from methyl 1,2-ortho esters. J Org Chem 2011; 77:795-800. [PMID: 22141592 DOI: 10.1021/jo202335n] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Mannopyranose-derived methyl 1,2-orthoacetates (R = Me) and 1,2-orthobenzoates (R = Ph) undergo stereoselective formation of 1α,1'β-disaccharides, upon treatment with BF(3)·Et(2)O in CH(2)Cl(2), rather than the expected acid-catalyzed reaction leading to methyl glycosides by way of a rearrangement-glycosylation process of the liberated methanol.
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Affiliation(s)
- Clara Uriel
- Instituto de Química Orgánica General (IQOG-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
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Di Gianvincenzo P, Arnaiz B, Ghezzi S, Vicenzi E, Martin L, Penadés S. Glyconanoparticles as a platform to multimerize peptides involved in HIV entry process. Retrovirology 2011. [PMCID: PMC3236904 DOI: 10.1186/1742-4690-8-s2-p18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Clayton R, Hardman J, LaBranche CC, McReynolds KD. Evaluation of the synthesis of sialic acid-PAMAM glycodendrimers without the use of sugar protecting groups, and the anti-HIV-1 properties of these compounds. Bioconjug Chem 2011; 22:2186-97. [PMID: 21859137 PMCID: PMC3241508 DOI: 10.1021/bc200331v] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A study was undertaken to evaluate the feasibility of synthesizing six sialic acid-PAMAM glycodendrimers using unprotected sialic acid in as few as 1-4 steps using two different reaction pathways, and to assess the sulfated derivatives for anti-HIV activity. The syntheses were accomplished through either the direct attachment of the sialic acid carboxyl group to amine-terminated PAMAM (a divergent-like approach) using BOP coupling, or by first reacting sialic acid with a polar bifunctional spacer molecule, attaching the sugar-linker to carboxy-terminated PAMAM (a convergent-like approach), and again using BOP-mediated coupling reactions. It was hypothesized that the latter approach would be the most successful method, as any steric congestion between the sialic acid and the PAMAM would be minimized using an intervening polar linker. However, the divergent-like synthesis proved to be the superior method, resulting in 11.4%, 14%, and 28% of the fully substituted generations 0, 1, and 2 sialic acid-PAMAM conjugates, respectively, as compared to 6.4% of only the generation -0.5 sialic acid-linker-PAMAM conjugate for the convergent-like method. Upon sulfation of the four glycodendrimers, binding capabilities to the recombinant HIV protein, gp120, were assessed using an ELISA assay. Compounds that showed promising binding characteristics were then further assessed for inhibition of HIV-1 infection using a well-characterized luciferase reporter gene neutralization assay. The generation 2 sulfated sialic acid-PAMAM glycodendrimer, sulfo-6, bearing 16 sialic acids with 11 sulfate groups incorporated at 4.03% sulfur content by weight, was found to inhibit all four HIV-1 strains tested in the low micromolar range.
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Affiliation(s)
- Russell Clayton
- Department of Chemistry California State University, Sacramento 6000 J Street Sacramento, CA 95819-6057 USA
| | - Janee’ Hardman
- Department of Chemistry California State University, Sacramento 6000 J Street Sacramento, CA 95819-6057 USA
| | | | - Katherine D. McReynolds
- Department of Chemistry California State University, Sacramento 6000 J Street Sacramento, CA 95819-6057 USA
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Bachan S, Fantini J, Joshi A, Garg H, Mootoo DR. Synthesis, gp120 binding and anti-HIV activity of fatty acid esters of 1,1-linked disaccharides. Bioorg Med Chem 2011; 19:4803-11. [PMID: 21783371 DOI: 10.1016/j.bmc.2011.06.078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Revised: 06/22/2011] [Accepted: 06/27/2011] [Indexed: 11/19/2022]
Abstract
Inspired by the anti-human immunodeficiency virus (HIV) activity of analogues of β-galactosylceramide (GalCer), a set of mono- and di-saccharide fatty acid esters were designed as GalCer mimetics and their binding to the V3 loop peptide of HIV-1 and anti-HIV activity evaluated. 1,1-linked Gal-Man and Glu-Man disaccharides with an ester on the Man subunit bound the V3 loop peptide and inhibited HIV infectivity in single round infection assays with the TZM-bl cell line. IC(50)'s were in the 50 μM range with no toxicity to the cells at concentrations up to 200 μM. These compounds appear to inhibit virus entry at early steps in viral infection since they were inactive if added post viral entry. Although these compounds were found to bind to the V3 loop peptide of gp120, it is not clear that this interaction is responsible for their anti-HIV activity because the relative binding affinity of closely related analogues did not correlate with their antiviral behavior. The low cytotoxicity of these 1,1-linked disaccharide fatty acid esters, combined with the easy accessibility to structurally diverse analogues make these molecules attractive leads for new topical anti-viral agents.
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Affiliation(s)
- Stewart Bachan
- Department of Chemistry, Hunter College, 695 Park Avenue, New York, NY 10021, USA
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Fabrication and Applications of Glyconanomaterials. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2011; 705:727-55. [DOI: 10.1007/978-1-4419-7877-6_38] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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27
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Spain SG, Cameron NR. A spoonful of sugar: the application of glycopolymers in therapeutics. Polym Chem 2011. [DOI: 10.1039/c0py00149j] [Citation(s) in RCA: 152] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Liu XX, Wan ZJ, Shi L, Lu XX. Preparation and antiherpetic activities of chemically modified polysaccharides from Polygonatum cyrtonema Hua. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2010.08.044] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Marradi M, García I, Penadés S. Carbohydrate-Based Nanoparticles for Potential Applications in Medicine. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2011; 104:141-73. [DOI: 10.1016/b978-0-12-416020-0.00004-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Chaudhuri P, Harfouche R, Sengupta S. The Bittersweet Promise of Glycobiology. Biomarkers 2010. [DOI: 10.1002/9780470918562.ch5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Morales-Serna JA, Boutureira O, Serra A, Matheu MI, Díaz Y, Castillón S. Synthesis of Hyperbranched β-Galceramide-Containing Dendritic Polymers that Bind HIV-1 rgp120. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000132] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Martínez-Avila O, Hijazi K, Marradi M, Clavel C, Campion C, Kelly C, Penadés S. Gold manno-glyconanoparticles: multivalent systems to block HIV-1 gp120 binding to the lectin DC-SIGN. Chemistry 2010; 15:9874-88. [PMID: 19681073 DOI: 10.1002/chem.200900923] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The HIV envelope glycoprotein gp120 takes advantage of the high-mannose clusters on its surface to target the C-type lectin dendritic cell-specific intracellular adhesion molecule-3-grabbing non-integrin (DC-SIGN) on dendritic cells. Mimicking the cluster presentation of oligomannosides on the virus surface is a strategy for designing carbohydrate-based antiviral agents. Bio-inspired by the cluster presentation of gp120, we have designed and prepared a small library of multivalent water-soluble gold glyconanoparticles (manno-GNPs) presenting truncated (oligo)mannosides of the high-mannose undecasaccharide Man(9)GlcNAc(2) and have tested them as inhibitors of DC-SIGN binding to gp120. These glyconanoparticles are ligands for DC-SIGN, which also interacts in the early steps of infection with a large number of pathogens through specific recognition of associated glycans. (Oligo)mannosides endowed with different spacers ending in thiol groups, which enable attachment of the glycoconjugates to the gold surface, have been prepared. manno-GNPs with different spacers and variable density of mannose (oligo)saccharides have been obtained and characterized. Surface plasmon resonance (SPR) experiments with selected manno-GNPs have been performed to study their inhibition potency towards DC-SIGN binding to gp120. The tested manno-GNPs completely inhibit the binding from the micro- to the nanomolar range, while the corresponding monovalent mannosides require millimolar concentrations. manno-GNPs containing the disaccharide Manalpha1-2Manalpha are the best inhibitors, showing more than 20 000-fold increased activity (100 % inhibition at 115 nM) compared to the corresponding monomeric disaccharide (100 % inhibition at 2.2 mM). Furthermore, increasing the density of dimannoside on the gold platform from 50 to 100 % does not improve the level of inhibition.
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Affiliation(s)
- Olga Martínez-Avila
- Laboratory of GlycoNanotechnology, Biofunctional Nanomaterial Unit, CIC biomaGUNE and CIBER-BBN, Parque Tecnológico, San Sebastián, Spain
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López JC, Ventura J, Uriel C, Gómez AM, Fraser-Reid B. Reaction of 1,2-Orthoesters with HF−Pyridine: A Method for the Preparation of Partly Unprotected Glycosyl Fluorides and Their Use in Saccharide Synthesis. Org Lett 2009; 11:4128-31. [DOI: 10.1021/ol901630d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Cristóbal López
- Instituto de Química Orgánica General (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain, and Natural Products and Glycotechnology Research Institute Inc. (NPG), 595F Weathersfield Road, Pittsboro, North Carolina 27312
| | - Juan Ventura
- Instituto de Química Orgánica General (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain, and Natural Products and Glycotechnology Research Institute Inc. (NPG), 595F Weathersfield Road, Pittsboro, North Carolina 27312
| | - Clara Uriel
- Instituto de Química Orgánica General (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain, and Natural Products and Glycotechnology Research Institute Inc. (NPG), 595F Weathersfield Road, Pittsboro, North Carolina 27312
| | - Ana M. Gómez
- Instituto de Química Orgánica General (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain, and Natural Products and Glycotechnology Research Institute Inc. (NPG), 595F Weathersfield Road, Pittsboro, North Carolina 27312
| | - Bert Fraser-Reid
- Instituto de Química Orgánica General (CSIC), Juan de la Cierva 3, 28006 Madrid, Spain, and Natural Products and Glycotechnology Research Institute Inc. (NPG), 595F Weathersfield Road, Pittsboro, North Carolina 27312
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36
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Morales-Serna JA, Díaz Y, Matheu MI, Castillón S. Efficient Synthesis of β-Glycosphingolipids by Reaction of Stannylceramides with Glycosyl Iodides Promoted by TBAI/AW 300 Molecular Sieves. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900424] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Martínez-Ávila O, Bedoya LM, Marradi M, Clavel C, Alcamí J, Penadés S. Multivalent Manno-Glyconanoparticles Inhibit DC-SIGN-Mediated HIV-1 Trans-Infection of Human T Cells. Chembiochem 2009; 10:1806-9. [DOI: 10.1002/cbic.200900294] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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38
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Ghosh T, Pujol CA, Damonte EB, Sinha S, Ray B. Sulfated Xylomannans from the Red Seaweed Sebdenia Polydactyla: Structural Features, Chemical Modification and Antiviral Activity. ACTA ACUST UNITED AC 2009; 19:235-42. [DOI: 10.1177/095632020901900603] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background: Many viruses display affinity for cell surface heparan sulfate proteoglycans with biological relevance in virus entry. This raises the possibility of the application of sulfated polysaccharides in antiviral therapy. Methods: In this study, we analysed polysaccharide fractions isolated from Sebdenia polydactyla. Results: The purified xylomannan sulfate and its further sulfated derivatives showed strong activity against herpes simplex virus type-1 (HSV-1). Their 50% inhibitory concentration values were in the range 0.35–2.8 µg/ml and they lacked cytotoxicity at concentrations up to 1,000 µg/ml. The major polysaccharide, which had 0.6 sulfate groups per monomer unit and an apparent molecular mass of 150 kDa, contained a backbone of α-(1→3)-linked D-mannopyranosyl residues substituted at position 6 with a single stub of ß-D-xylopyranosyl residues. Conclusions: The degree of sulfation seemed to play an important role because desulfation and/or further sulfation of the isolated macromolecules largely influenced their in vitro anti-HSV-1 activity.
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Affiliation(s)
- Tuhin Ghosh
- Natural Products Laboratory, Department of Chemistry, University of Burdwan, West Bengal, India
| | - Carlos Alberto Pujol
- Laboratorio de Virología, Departamento de Quimica Biológica, Facultad de Ciencias Exactas y Naturales UBA, Ciudad Universitaria-Pabellón II Piso 4, Buenos Aires, Argentina
| | - Elsa Beatriz Damonte
- Laboratorio de Virología, Departamento de Quimica Biológica, Facultad de Ciencias Exactas y Naturales UBA, Ciudad Universitaria-Pabellón II Piso 4, Buenos Aires, Argentina
| | - Sharmistha Sinha
- Natural Products Laboratory, Department of Chemistry, University of Burdwan, West Bengal, India
| | - Bimalendu Ray
- Natural Products Laboratory, Department of Chemistry, University of Burdwan, West Bengal, India
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Remmert S, Hollis H, Parish CA. Conformational analysis of trimeric maleimide substituted 1,5,9-triazacyclododecane HIV fusion scaffolds. Bioorg Med Chem 2009; 17:1251-8. [PMID: 19135378 DOI: 10.1016/j.bmc.2008.12.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2008] [Revised: 12/07/2008] [Accepted: 12/10/2008] [Indexed: 11/16/2022]
Abstract
An analysis of the conformational preferences of three trimeric maleimide substituted 1,5,9-triazacyclododecane derivatives, proposed as cross linking reagents for HIV-1 fusion inhibitors, is presented. Exhaustive sampling was performed using the mixed Low Mode Monte Carlo conformational searching technique on the corresponding OPLS2005/GBSA(water) potential energy surface. Geometric structure, molecular length, and hydrogen bonding patterns of the compounds are analyzed. Global minimum energy structures were verified as minima using B3LYP/6-31G * geometry optimization. All structures adopt a crown-like 12-membered ring conformation; however, the system with the shortest maleimide arms (1a) can also adopt alternative ring orientations. Overall, derivatives with longer maleimide arms were more flexible and resulted in ensembles with a larger number of low energy structures. Comparison with biological inhibition data indicates that there is very little relationship between molecular size and the ability of the scaffold to orient CD4M9 miniproteins for optimal inhibition; however hydrophobicity may play a role.
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Affiliation(s)
- Sarah Remmert
- Department of Chemistry, University of Richmond, Gottwald Science Center, Richmond, VA 23173, USA
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Ohara K, Jacquinet JC, Jouanneau D, Helbert W, Smietana M, Vasseur JJ. Matrix-assisted laser desorption/ionization mass spectrometric analysis of polysulfated-derived oligosaccharides using pyrenemethylguanidine. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2009; 20:131-137. [PMID: 18838278 DOI: 10.1016/j.jasms.2008.09.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2008] [Revised: 09/01/2008] [Accepted: 09/01/2008] [Indexed: 05/26/2023]
Abstract
A better understanding of the biological roles of carbohydrates requires the use of tools able to provide efficient and rapid structural information. Unfortunately, highly acidic oligomers-such as polysulfated oligosaccharides-are very challenging to characterize because of their high polarity, structural diversity, and sulfate lability. These features pose special problems for matrix-assisted laser desorption/ionization mass spectrometric (MALDI-MS) analysis because polysulfated carbohydrates exhibit poor ionization efficiency and usually do not produce any signal. The present report demonstrates how MALDI-MS can be used to derive structural and compositional information from pure and mixed fractions of polysulfated oligosaccharides. Indeed, pyrenemethylguanidine (pmg, a derivatizing agent and ionization efficiency enhancer) was used for the analysis of di- to decasaccharides, carrying from two to nine sulfate groups. The method is applied to various highly sulfated chondroitin and carrageenan oligosaccharides as well as to the analysis of mixtures of compounds. In the mass spectra, the observation of a unique pmg-complexed ladder of peaks in both ionization modes allows an easy and rapid determination of both the number of sulfate groups carried by the analyte and its molecular weight. Moreover, we have developed a software tool for the rapid and automatic structural elucidation of carrageenans based on the mass spectra obtained.
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Affiliation(s)
- Keiichiro Ohara
- Institut des Biomolécules Max Mousseron, UMR 5247 CNRS, Université Montpellier 1 and Université Montpellier 2, Montpellier, France
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Polysaccharides from Gracilaria corticata: Sulfation, chemical characterization and anti-HSV activities. Int J Biol Macromol 2008; 43:346-51. [DOI: 10.1016/j.ijbiomac.2008.07.009] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2008] [Revised: 07/09/2008] [Accepted: 07/10/2008] [Indexed: 11/21/2022]
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Ghosh T, Chattopadhyay K, Marschall M, Karmakar P, Mandal P, Ray B. Focus on antivirally active sulfated polysaccharides: from structure-activity analysis to clinical evaluation. Glycobiology 2008; 19:2-15. [PMID: 18815291 DOI: 10.1093/glycob/cwn092] [Citation(s) in RCA: 270] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
In recent years, many compounds having potent antiviral activity in cell culture have been detected and some of these compounds are currently undergoing either preclinical or clinical evaluation. Among these antiviral substances, naturally occurring sulfated polysaccharides and those from synthetic origin are noteworthy. Recently, several controversies over the molecular structures of sulfated polysaccharides, viral glycoproteins, and cell-surface receptors have been resolved, and many aspects of their antiviral activity have been elucidated. It has become clear that the antiviral properties of sulfated polysaccharides are not only a simple function of their charge density and chain length but also their detailed structural features. The in vivo efficacy of these compounds mostly corresponds to their ability to inhibit the attachment of the virion to the host cell surface although in some cases virucidal activity plays an additional role. This review summarizes experimental evidence indicating that sulfated polysaccharides might become increasingly important in drug development for the prevention of sexually transmitted diseases in the near future.
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Affiliation(s)
- Tuhin Ghosh
- Department of Chemistry, Natural Products Laboratory, University of Burdwan, WB 713 104, India
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Mandal P, Pujol CA, Carlucci MJ, Chattopadhyay K, Damonte EB, Ray B. Anti-herpetic activity of a sulfated xylomannan from Scinaia hatei. PHYTOCHEMISTRY 2008; 69:2193-9. [PMID: 18572208 DOI: 10.1016/j.phytochem.2008.05.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2007] [Revised: 05/05/2008] [Accepted: 05/07/2008] [Indexed: 05/24/2023]
Abstract
Many viruses display affinity for cell surface heparan sulfate proteoglycans with biological relevance in virus entry. This raises the possibility of the application of sulfated polysaccharides in antiviral therapy. In this study we have analyzed polysaccharide fractions isolated from Scinaia hatei. The crude water extract (ShWE) as well as one fraction (F1) obtained by size exclusion chromatography had potent anti-HSV activity. Their inhibitory concentration 50% (IC50) values ranging from 0.5 to 4.6 microg/ml were much lower than the cytotoxic concentration 50% (CC50) values (1000 microg/ml). These fractions had very low anticoagulant activity. Furthermore, they had a weak inactivating effect on virions in a virucidal assay at concentrations in the range of 60-100 microg/ml. Chemical, chromatographic and spectroscopic methods showed that the major polysaccharide, which had 0.4 sulfate group per monomer unit and an apparent molecular mass of 160 kDa, contained a backbone of alpha-(1-->3)-linked D-mannopyranosyl residues substituted at C-6, C-4 and C-2 with single stub of beta-d-xylopyranosyl residues. Sulfate groups, when present, are located at C-4 of alpha-(1-->3)-linked D-mannopyranosyl units, and appeared to be very important for the anti-herpetic activity of this polymer.
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Affiliation(s)
- Pinaki Mandal
- Natural Products Laboratory, Department of Chemistry, The University of Burdwan, Golapbag, Burdwan, West Bengal 713 104, India
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Morales-Serna JA, Díaz Y, Matheu MI, Castillón S. Stannyl ceramides as efficient acceptors for synthesising β-galactosyl ceramides. Org Biomol Chem 2008; 6:3831-6. [DOI: 10.1039/b809570a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sousa-Herves A, Fernandez-Megia E, Riguera R. Synthesis and supramolecular assembly of clicked anionic dendritic polymers into polyion complex micelles. Chem Commun (Camb) 2008:3136-8. [DOI: 10.1039/b805208e] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Teumelsan N, Huang X. Synthesis of branched Man5 oligosaccharides and an unusual stereochemical observation. J Org Chem 2007; 72:8976-9. [PMID: 17939719 PMCID: PMC2525796 DOI: 10.1021/jo7013824] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Branched mannopentaoses were synthesized through two routes. While assembly from the nonreducing end to the reducing end was more convergent with fewer intermediate steps, two diastereomers were obtained. On the other hand, synthesis from the reducing end to the nonreducing end yielded the mannopentaose with the desired stereochemistry as a single isomer. Our results suggest that it is still challenging to reliably predict stereochemical outcome of a glycosylation reaction. It is necessary to thoroughly characterize anomeric configurations of newly formed glycosidic linkages in complex oligosaccharide synthesis.
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Affiliation(s)
- Nardos Teumelsan
- Department of Chemistry, The University of Toledo, Toledo, OH 43606, USA
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