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Chain conformation of an acidic polysaccharide from green tea and related mechanism of α-amylase inhibitory activity. Int J Biol Macromol 2020; 164:1124-1132. [PMID: 32682045 DOI: 10.1016/j.ijbiomac.2020.07.125] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/03/2020] [Accepted: 07/12/2020] [Indexed: 12/18/2022]
Abstract
An acidic tea polysaccharide (TPSA) isolated from green tea was fractionated using a precipitation-fractionation method into seven fractions with different molecular weights. TPSA was characterized as a hyperbranched polysaccharide with a globular homogeneous conformation by analysis of solution parameters of each fraction using static light scattering and viscosity analyses. Observation by transmission electron microscopy confirmed that TPSA occurred as globular homogeneous particles with size in the range of 20-40 nm. To simulate the branched chain segments of TPSA, four model molecules were designed based on chemical structure of TPSA. Molecular docking analysis indicated that the branched chain segments of TPSA similar to the TPSA-4 model molecule showed preferential binding to α-amylase to form the TPSA/α-amylase complex through hydrogen bonding interactions. Circular dichroism spectroscopy showed that the structure of α-amylase was not significantly affected by TPSA. The mechanism of α-amylase inhibitory activity of TPSA was simulated by molecular docking analysis. The branched chain segments of TPSA similar to the TPSA-4 model molecule likely act as a potential competitor to the starch substrate to inhibit the activity of α-amylase.
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2
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Rafiee Samani Z, Mehranpour A. Synthesis of novel 5-substituted isophthalates from vinamidinium salts. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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3
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Cook AB, Barbey R, Burns JA, Perrier S. Hyperbranched Polymers with High Degrees of Branching and Low Dispersity Values: Pushing the Limits of Thiol–Yne Chemistry. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00132] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Alexander B. Cook
- Department
of Chemistry, The University of Warwick, Coventry CV4 7AL, U.K
| | - Raphael Barbey
- Key Centre for Polymers & Colloids, School of Chemistry, Building F11, The University of Sydney, Sydney, NSW 2006, Australia
| | - James A. Burns
- Syngenta, Jealott’s
Hill International Research Centre, Bracknell, Berkshire RG42 6EY, U.K
| | - Sébastien Perrier
- Department
of Chemistry, The University of Warwick, Coventry CV4 7AL, U.K
- Faculty
of Pharmacy and Pharmaceutical Sciences, Monash University, 381
Royal Parade, Parkville, Victoria 3052, Australia
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4
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Zhou Z, Hao T, Yan D. Kinetic Model of the Amphiphilic Copolymers with Hyperbranched Core Formed by AB 2Monomer and B fInitiator. MACROMOL THEOR SIMUL 2015. [DOI: 10.1002/mats.201400102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Zhiping Zhou
- School of Materials Science and Engineering; Jiangsu University; 301 Xuefu Road Zhenjiang 212013 China
| | - Tongfan Hao
- School of Materials Science and Engineering; Jiangsu University; 301 Xuefu Road Zhenjiang 212013 China
| | - Deyue Yan
- School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 China
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5
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Affiliation(s)
- Zhiping Zhou
- School of Materials Science and Engineering; Jiangsu University; 301 Xuefu Road Zhenjiang 212013 China
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6
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Chen JY, Smet M, Zhang JC, Shao WK, Li X, Zhang K, Fu Y, Jiao YH, Sun T, Dehaen W, Liu FC, Han EH. Fully branched hyperbranched polymers with a focal point: analogous to dendrimers. Polym Chem 2014. [DOI: 10.1039/c3py01401k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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7
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Han Y, Ba X, Zhao Y, Cao C. Statistical Investigation of the Mean Size Distribution of AB 2/B f Type Hyperbranched Polymer. J MACROMOL SCI B 2013. [DOI: 10.1080/00222348.2012.687333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Yinghui Han
- a Department of Mathematics and Physics , North China Electric Power University , Baoding , P. R. China
| | - Xinwu Ba
- b College of Chemistry and Environment Science , Hebei University , Baoding , P. R. China
| | - Yi Zhao
- c School of Environment Science and Technology , North China Electric Power University , Baoding , P. R. China
| | - Chunmei Cao
- a Department of Mathematics and Physics , North China Electric Power University , Baoding , P. R. China
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8
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Zhou Z, Jia Z, Yan D. Kinetic analysis of AB2 polycondensation in the presence of multifunctional cores with various reactivities. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.05.032] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Yang L, Fu S, Zhu X, Zhang LM, Yang Y, Yang X, Liu H. Hyperbranched acidic polysaccharide from green tea. Biomacromolecules 2010; 11:3395-405. [PMID: 21028801 DOI: 10.1021/bm100902d] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An acidic tea polysaccharide (ALTPS), isolated from green tea ( Camellia sinensis ), was characterized as a hyperbranched glycoprotein containing the acidic heteropolysaccharide chains and the protein residues from the results of UV-vis, FTIR, one- and two-dimensional NMR, GC, GC-MS, and amino acid analyses. Solution properties of ALTPS were investigated by static and dynamic light scattering analyses and viscometry. The results indicated that the viscosity behavior of ALTPS exhibited a typical polyelectrolyte effect in distilled water, which may be avoided by adding salts. The low intrinsic viscosity of ALTPS in the solutions (8-15 mL/g) is attributed to its hyperbranched structure. By application of the polymer solution theory, it was revealed that ALTPS was present in a sphere-like conformation in the solutions as a result of the hyperbranched structure. The TEM image further confirmed that ALTPS existed in a spherical conformation in aqueous NaCl solution. Glucose was absorbed by ALTPS, which may be one of blood glucose lowering mechanisms of tea polysaccharides.
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Affiliation(s)
- Liqun Yang
- Institute of Polymer Science, School of Chemistry and Chemical Engineering, BME Center, State Key Laboratory of Optoelectronic Materials and Technologies, DSAPM Lab and PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China.
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10
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Murillo EA, Cardona A, López BL. Rheological behavior in the molten state and solution of hyperbranched polyester of fourth and fifth generation. J Appl Polym Sci 2010. [DOI: 10.1002/app.32774] [Citation(s) in RCA: 21] [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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11
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Effect of slow monomer addition on molecular parameters of hyperbranched polymers synthesized in the presence of multifunctional core molecules. Sci China Chem 2010. [DOI: 10.1007/s11426-010-0121-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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12
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Jena KK, Narayan R, Raju KVSN. Hyperbranched polyester based on the core + AB2approach: Synthesis and structural investigation. J Appl Polym Sci 2010. [DOI: 10.1002/app.32297] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Kinetic analysis of co-polycondensation of AB2 and AB type monomers in presence of multi-functional cores. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.04.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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14
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An P, Ba X, Lu S. Preparation and characterization of crosslinked poly(methylmethacrylate) heat sensitive color-developing nanocapsules. Polym Bull (Berl) 2009. [DOI: 10.1007/s00289-009-0188-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Zhao X, Liu L, Dai H, Ma C, Tan X, Yu R. Synthesis and application of water-soluble hyperbranched poly(ester)s from maleic anhydride and glycerol. J Appl Polym Sci 2009. [DOI: 10.1002/app.29965] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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16
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Zhou Z, Yan D. Effect of Multifunctional Initiator on Self-Condensing Vinyl Polymerization with Nonequal Molar Ratio of Stimulus to Monomer. Macromolecules 2009. [DOI: 10.1021/ma900443u] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhiping Zhou
- School of Materials Science and Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
| | - Deyue Yan
- The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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18
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AB<SUB>2</SUB>型<SUB>β</SUB>-环糊精功能单体及其水溶性超支化聚合物的合成与表征. ACTA POLYM SIN 2009. [DOI: 10.3724/sp.j.1105.2008.01020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Jena KK, Raju KVSN. Synthesis and Characterization of Hyperbranched Polyurethane−Urea/Silica Based Hybrid Coatings. Ind Eng Chem Res 2007. [DOI: 10.1021/ie0703181] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kishore K. Jena
- Organic Coatings and Polymers Division, Indian Institute of Chemical Technology, Hyderabad−500 007, India
| | - K. V. S. N. Raju
- Organic Coatings and Polymers Division, Indian Institute of Chemical Technology, Hyderabad−500 007, India
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20
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NMR and MALDI-TOF MS study of side reactions in hyperbranched polyesters based on 2,2-bis(hydroxymethyl)propanoic acid. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.02.019] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Characterization of aliphatic hyperbranched polyesters by MALDI-TOF mass spectrometry. HEMIJSKA INDUSTRIJA 2007. [DOI: 10.2298/hemind0706333v] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In this work, MALDI-TOF mass spectrometry was used for the characterization of aliphatic hyperbranched polyesters (AHBP), synthesized from 2,2-bis(hydroxymethyl)propionic acid (bis-MPA) and di-trimethylolpropane. From the obtained results it was concluded that it was not possible to take complete advantages of MALDI-TOF MS in this particular case, since the AHBP used in this work were polydisperse. The intensity of the signals from the high mass tail of these samples (pseudo generation higher than four) was underestimated and insufficient to distinguish it from the baseline and to use it for the analysis of the spectra. As a consequence of that, lower values of the Mn were obtained. At the same time, Mw were also underestimated, which led to very low values of the polydispersity index. On the other hand, it was possible to obtain molar masses of individual molecules from the MALDI-TOF mass spectra of AHBP and to qualitatively determine the extent of cyclization (side reactions) at each degree of polymerization. Using the adequate set of equations and results obtained from MALDI-TOF mass spectra of AHBP, every signal from the spectra was identified. The obtained results show that formation of poly(bis-MPA), intramolecular esterification and intramolecular etherification occurred as side reactions during the synthesis of these polyesters. The relative amount of the cycles increases with the number of pseudo generation (from the second up to the fifth pseudo generation). It was also observed that the relative proportion of the signals which represent cyclic structures increases with the increasing degree of polymerization. In this work the basic principles of MALDI-TOF MS are also presented, as well as, a review of adequate published articles.
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22
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Fradet A, Tessier M. Average Degrees of Polymerization and Molar Masses of Branched and Hyperbranched Condensation Polymers: Recursive Probability Approach. Macromolecules 2006. [DOI: 10.1021/ma060694h] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alain Fradet
- Université Pierre et Marie Curie-Paris6, Laboratoire de Chimie des Polymères, Courrier 184, 4 Place Jussieu, Paris, France; CNRS, UMR 7610, Paris, France
| | - Martine Tessier
- Université Pierre et Marie Curie-Paris6, Laboratoire de Chimie des Polymères, Courrier 184, 4 Place Jussieu, Paris, France; CNRS, UMR 7610, Paris, France
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23
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24
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Sun M, Li J, Li B, Fu Y, Bo Z. Toward High Molecular Weight Triphenylamine-Based Hyperbranched Polymers. Macromolecules 2005. [DOI: 10.1021/ma048648+] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Kulshrestha AS, Gao W, Gross RA. Glycerol Copolyesters: Control of Branching and Molecular Weight Using a Lipase Catalyst. Macromolecules 2005. [DOI: 10.1021/ma0480190] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ankur S. Kulshrestha
- NSF−I/UCRC Center for Biocatalysis and Bioprocessing of Macromolecules, Othmer Department of Chemical and Biological Sciences and Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
| | - Wei Gao
- NSF−I/UCRC Center for Biocatalysis and Bioprocessing of Macromolecules, Othmer Department of Chemical and Biological Sciences and Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
| | - Richard A. Gross
- NSF−I/UCRC Center for Biocatalysis and Bioprocessing of Macromolecules, Othmer Department of Chemical and Biological Sciences and Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
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26
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Mansour SH, Rozik NN, Dirnberger K, Ikladious NE. Hyperbranched polyesters based on polycondensation of 1,3,5-tris(2-hydroxyethyl) cyanuric acid and 3,5-dihydroxybenzoic acid. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/pola.20788] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Czupik M, Bankey N, Fossum E. A Study of the Aryl–Aryl Coupling Reactions of (4‐X‐C6H4)Ph2P˭O. SYNTHETIC COMMUN 2004. [DOI: 10.1081/scc-120027718] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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28
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Fei Z, Li B, Bo Z, Lu R. Synthesis and Properties of Hyperbranched Conjugated Porphyrins. Org Lett 2004; 6:4703-6. [PMID: 15575665 DOI: 10.1021/ol048078y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] Hyperbranched conjugated porphyrin arrays were prepared by one-pot Suzuki polycondensation of AB3 and AB3 + C4 approaches.
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Affiliation(s)
- Zhuping Fei
- State Key Laboratory of Polymer Physics and Chemistry, CAS Key Lab of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China
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29
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Kricheldorf HR, Hobzova R, Schwarz G, Schultz CL. Hyperbranched polyesters of 3,5-diacetoxybenzoic acid: A reinvestigation. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pola.20217] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Tuncel D, Steinke JHG. Catalytic Self-Threading: A New Route for the Synthesis of Polyrotaxanes. Macromolecules 2003. [DOI: 10.1021/ma034294v] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dönüs Tuncel
- Department of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Joachim H. G. Steinke
- Department of Chemistry, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
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31
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Kricheldorf HR, Hobzova R, Schwarz G. Cyclic hyperbranched polyesters derived from 4,4-bis(4′-hydroxyphenyl)valeric acid. POLYMER 2003. [DOI: 10.1016/j.polymer.2003.09.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Bernal DP, Bedrossian L, Collins K, Fossum E. Effect of Core Reactivity on the Molecular Weight, Polydispersity, and Degree of Branching of Hyperbranched Poly(arylene ether phosphine oxide)s. Macromolecules 2003. [DOI: 10.1021/ma021510b] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David P. Bernal
- Department of Chemistry, Wright State University, 3640 Colonel Glenn Hwy., Dayton, Ohio 45435
| | - Laura Bedrossian
- Department of Chemistry, Wright State University, 3640 Colonel Glenn Hwy., Dayton, Ohio 45435
| | - Kelly Collins
- Department of Chemistry, Wright State University, 3640 Colonel Glenn Hwy., Dayton, Ohio 45435
| | - Eric Fossum
- Department of Chemistry, Wright State University, 3640 Colonel Glenn Hwy., Dayton, Ohio 45435
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