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Kaga H, Orita M, Endo K, Akamatsu M, Sakai K, Sakai H. Interaction between Sophorolipids and β-glucan in Aqueous Solutions. J Oleo Sci 2024; 73:169-176. [PMID: 38311407 DOI: 10.5650/jos.ess23189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024] Open
Abstract
Skin disorders, including acne vulgaris, atopic dermatitis, and rosacea, are characterized by the presence of biofilms, which are communities of microorganisms. The mechanical stability of biofilms is attributed to one of their constituents-polysaccharides-which are secreted by microorganisms. Sophorolipids are biosurfactants with biofilm disruption and removal abilities and are expected to become alternatives for classical petrochemical-based surfactants in cosmetics. In this study, we investigated the influence of sophorolipids on β-glucan such as dispersion status, interaction mechanism, and configuration change as a model polysaccharide of biofilm in aqueous solution. Dynamic light scattering measurements showed that sophorolipids interfere with the aggregation of β- glucan in aqueous solutions. In contrast, sodium dodecyl sulfate (SDS), which is used as a typical surfactant reference, promotes the aggregation of β-glucan. The interaction between sophorolipids and β-glucan were investigated using surface tension measurements and isothermal titration calorimetry (ITC). Surface tension increased only near critical micelle concentration (CMC) region of sophorolipids in the presence of β-glucan. This suggests that the interaction occurred in the solution rather than at the air-liquid interface. Moreover, the results of ITC indicate that hydrophobic interactions were involved in this interaction. In addition, the results of optical rotation measurements indicate that sophorolipids did not unfold the triple helical structure of β-glucan. β-glucan dispersion was expected to be caused steric hindrance and electrostatic repulsion when sophorolipids interacted with β-glucan via hydrophobic interactions owing to the unique molecular structure of sophorolipids attributed by a bulky sugar moiety and a carboxyl functional group. These results demonstrated unique performances of sophorolipids on β-glucan and provided more insights on the efficacy of sophorolipids as good anti-biofilms.
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Affiliation(s)
- Hiroaki Kaga
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
- Research & Innovation Center, Nihon L'Oréal K.K
| | | | - Koji Endo
- Research & Innovation Center, Nihon L'Oréal K.K
| | - Masaaki Akamatsu
- Department of Chemistry and Biotechnology, Faculty of Engineering, Tottori University
| | - Kenichi Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
- Research Institute for Science and Technology, Tokyo University of Science
| | - Hideki Sakai
- Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science
- Research Institute for Science and Technology, Tokyo University of Science
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2
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Zhang X, Hong L, Zhu BJ, Yuan Y, Li SP, Zhao J. Atomic force microscopy based conformation and immunological activity of Lentinan injections. Int J Biol Macromol 2023; 253:126901. [PMID: 37716659 DOI: 10.1016/j.ijbiomac.2023.126901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 08/03/2023] [Accepted: 09/12/2023] [Indexed: 09/18/2023]
Abstract
The purpose of this study was to investigate the morphological characteristics of different brands of lentinan injections produced in China using atomic force microscopy (AFM) and their relationship to immunological activity. Based on AFM imaging, chain height could be used as characterizing the conformation of lentinan, and the heights of 95 % confidence interval for triple, double and single helix were 1.746 ± 0.039 nm, 1.564 ± 0.037 nm and 1.243 ± 0.031 nm, respectively, which were calculated using self-developed MATLAB protocol. AFM characters and their immunological activity of different lentinan injection were compared. In detail, two parameters, triple helix ratio 51.3 % and adhesion force 800 pN, of Jinling (JL) lentinan injection are much higher than samples of other four manufacturers. In addition, immunological activity of JL lentinan injection is also significantly higher than Yineng's. High performance size exclusion chromatography (HPSEC) profiles of different lentinans were also compared, and the data were in accordance with those from AFM. Molecular weight accumulation curves could be used for evaluation of quality consistence of different batches of lentinan from same manufacturer and/or different manufacturers. The results showed that quality consistence of lentinan from different manufactures is poor, which should be greatly improved.
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Affiliation(s)
- Xuan Zhang
- Joint Laboratory of Chinese Herbal Glycoengineering and Testing Technology, University of Macau & National Glycoengineering Research Center, China; Macao Centre for Testing of Chinese Medicine, University of Macau, China; State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, China
| | - Liang Hong
- Joint Laboratory of Chinese Herbal Glycoengineering and Testing Technology, University of Macau & National Glycoengineering Research Center, China; Macao Centre for Testing of Chinese Medicine, University of Macau, China; State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, China
| | - Bao-Jie Zhu
- Joint Laboratory of Chinese Herbal Glycoengineering and Testing Technology, University of Macau & National Glycoengineering Research Center, China; Macao Centre for Testing of Chinese Medicine, University of Macau, China; State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, China
| | - Yaozu Yuan
- Jiangsu Institute for Food and Drug Control, Nanjing, China.
| | - Shao-Ping Li
- Joint Laboratory of Chinese Herbal Glycoengineering and Testing Technology, University of Macau & National Glycoengineering Research Center, China; Macao Centre for Testing of Chinese Medicine, University of Macau, China; State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, China.
| | - Jing Zhao
- Joint Laboratory of Chinese Herbal Glycoengineering and Testing Technology, University of Macau & National Glycoengineering Research Center, China; Macao Centre for Testing of Chinese Medicine, University of Macau, China; State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, China.
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3
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Yang F, Cheung PCK. Fungal β-Glucan-Based Nanotherapeutics: From Fabrication to Application. J Fungi (Basel) 2023; 9:jof9040475. [PMID: 37108930 PMCID: PMC10143420 DOI: 10.3390/jof9040475] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
Fungal β-glucans are naturally occurring active macromolecules used in food and medicine due to their wide range of biological activities and positive health benefits. Significant research efforts have been devoted over the past decade to producing fungal β-glucan-based nanomaterials and promoting their uses in numerous fields, including biomedicine. Herein, this review offers an up-to-date report on the synthetic strategies of common fungal β-glucan-based nanomaterials and preparation methods such as nanoprecipitation and emulsification. In addition, we highlight current examples of fungal β-glucan-based theranostic nanosystems and their prospective use for drug delivery and treatment in anti-cancer, vaccination, as well as anti-inflammatory treatments. It is anticipated that future advances in polysaccharide chemistry and nanotechnology will aid in the clinical translation of fungal β-glucan-based nanomaterials for the delivery of drugs and the treatment of illnesses.
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Affiliation(s)
- Fan Yang
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong 999077, China
| | - Peter Chi Keung Cheung
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong 999077, China
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4
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Effects of different sources of β-glucan on pasting, gelation, and digestive properties of pea starch. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2022.108172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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5
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Zhang C, Fu Q, Hua Y, Zhang H, Duan Y. Correlation of conformational changes and immunomodulatory activity of lentinan under different subcritical water temperature. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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6
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Xu Y, Huang J, Fan Y, Long H, Liang M, Chen Q, Wang Z, Wu C, Wang Y. Macrophage-Targeted Berberine-Loaded β-Glucan Nanoparticles Enhance the Treatment of Ulcerative Colitis. Int J Nanomedicine 2022; 17:5303-5314. [DOI: 10.2147/ijn.s379792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 11/04/2022] [Indexed: 11/15/2022] Open
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7
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A highly branched α-D-glucan facilitates antitumor immunity by reducing cancer cell CXCL5 expression. Int J Biol Macromol 2022; 209:166-179. [PMID: 35390399 DOI: 10.1016/j.ijbiomac.2022.03.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 03/22/2022] [Accepted: 03/31/2022] [Indexed: 11/22/2022]
Abstract
Tumor immunotherapy has emerged as a major pillar of anticancer therapeutic strategies. Natural polysaccharides, known for their strong immunomodulatory activities with relatively low cost and toxicity, are becoming promising prospects for cancer immunotherapy. In this study, we investigated the antitumor mechanism of JNY2PW, a highly branched α-D-glucan previously purified from the traditional marine Chinese medicine Arca inflata. JNY2PW was shown to enhance the sensitivity of tumor cells to co-culture macrophage supernatants by decreasing cancer cell CXCL5 expression. Furthermore, JNY2PW exerted antitumor effects without obvious toxic side effects in tumor-bearing mice by triggering the Akt/mTOR and ERK/GSK3β/β-catenin pathways and attenuating expression of CXCL5 in cancer cells. Remarkably, JNY2PW reduced tumor proliferation and dampened CXCL5 expression in tumor cells overexpressing CXCL5 both in vitro and in vivo. Additionally, JNY2PW blocked epithelial-mesenchymal transition (EMT) in both CXCL5-overexpressing and wild type tumor cells. Our data therefore uncovered a previously unrecognized antitumor mechanism for JNY2PW, suggesting that JNY2PW is a promising adjuvant as an immunomodulator for cancer immunotherapy.
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Advances in oral absorption of polysaccharides: Mechanism, affecting factors, and improvement strategies. Carbohydr Polym 2022; 282:119110. [DOI: 10.1016/j.carbpol.2022.119110] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 01/04/2022] [Accepted: 01/05/2022] [Indexed: 02/08/2023]
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9
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10
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Li M, Wen J, Huang X, Nie Q, Wu X, Ma W, Nie S, Xie M. Interaction between polysaccharides and toll-like receptor 4: Primary structural role, immune balance perspective, and 3D interaction model hypothesis. Food Chem 2021; 374:131586. [PMID: 34839969 DOI: 10.1016/j.foodchem.2021.131586] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/08/2021] [Accepted: 11/08/2021] [Indexed: 12/12/2022]
Abstract
Various structural types of polysaccharides are recognized by toll-like receptor 4 (TLR4). However, the mechanism of interaction between the polysaccharides with different structures and TLR4 is unclarified. This review summarized the primary structure of polysaccharides related to TLR4, mainly including molecular weight, monosaccharide composition, glycosidic bonds, functional groups, and branched-chain structure. The optimal primary structure for interacting with TLR4 was obtained by the statistical analysis. Besides, the dual-directional regulation of TLR4 signaling cascade by polysaccharides was also elucidated from an immune balance perspective. Finally, the 3D interaction model of polysaccharides to TLR4-myeloid differentiation factor 2 (MD2) complex was hypothesized according to the LPS-TLR4-MD2 dimerization model and the polysaccharides solution conformation. The essence of polysaccharides binding to TLR4-MD2 complex is a multivalent non-covalent bond interaction. All the arguments summarized in this review are intended to provide some new insights into the interaction between polysaccharides and TLR4.
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Affiliation(s)
- Mingzhi Li
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology (Nanchang), Nanchang University, 235 Nanjing East Road, Nanchang 330047, China
| | - Jiajia Wen
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology (Nanchang), Nanchang University, 235 Nanjing East Road, Nanchang 330047, China
| | - Xiaojun Huang
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology (Nanchang), Nanchang University, 235 Nanjing East Road, Nanchang 330047, China
| | - Qixing Nie
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, and the Key Laboratory of Molecular Cardiovascular Science (Peking University), Ministry of Education, Beijing, China
| | - Xincheng Wu
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology (Nanchang), Nanchang University, 235 Nanjing East Road, Nanchang 330047, China
| | - Wanning Ma
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology (Nanchang), Nanchang University, 235 Nanjing East Road, Nanchang 330047, China
| | - Shaoping Nie
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology (Nanchang), Nanchang University, 235 Nanjing East Road, Nanchang 330047, China.
| | - Mingyong Xie
- State Key Laboratory of Food Science and Technology, China-Canada Joint Lab of Food Science and Technology (Nanchang), Nanchang University, 235 Nanjing East Road, Nanchang 330047, China.
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11
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Xu X, Wang Q, Xue S, Pan Y, Chen S. Effect of alkali-neutralization treatment on triple-helical aggregates and independent triple helices of curdlan. Carbohydr Polym 2021; 259:117775. [PMID: 33674017 DOI: 10.1016/j.carbpol.2021.117775] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 01/18/2021] [Accepted: 02/03/2021] [Indexed: 02/06/2023]
Abstract
Triple-helical aggregates (THAs) have been proven to affect the biological activities and functional properties of triple-helix polysaccharides. Thus, it's urgent to seek a method to reduce the size of THAs while preserving independent triple helices (ITHs). In this study, the effects of alkali-neutralization (AN) treatment on THAs and ITHs of curdlan were studied. The positive values of the Congo red test data (R2>0.99) fitted using a Logistic model indicated that AN treatment (CNaOH/HCl>0.28 mol/L) facilitated the disaggregation of THAs. Congo red test, sedimentation test, and turbidity test showed that AN treatment (CNaOH/HCl = 1.0 mol/L) significantly reduced the size of THAs to approximately 1 μm while effectively increasing the relative amount of ITHs to approximately 199 %. Fourier transform infrared spectroscopy and X-ray diffraction analysis showed that AN treatment basically unchanged the primary structure of curdlan chains, but affected the crystalline structure and the intermolecular and intramolecular hydrogen bonding of curdlan.
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Affiliation(s)
- Xindong Xu
- College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China; Collaborative Innovation Center for Guangxi Sugar Industry, Guangxi University, Nanning, 530004, People's Republic of China
| | - Qing Wang
- College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China; Collaborative Innovation Center for Guangxi Sugar Industry, Guangxi University, Nanning, 530004, People's Republic of China
| | - Siya Xue
- College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China; Collaborative Innovation Center for Guangxi Sugar Industry, Guangxi University, Nanning, 530004, People's Republic of China
| | - Yuxue Pan
- College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China; Collaborative Innovation Center for Guangxi Sugar Industry, Guangxi University, Nanning, 530004, People's Republic of China
| | - Shan Chen
- College of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, People's Republic of China; Collaborative Innovation Center for Guangxi Sugar Industry, Guangxi University, Nanning, 530004, People's Republic of China.
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12
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Zhang H, Li T, Liu B, Ma TN, Huang L, Bai ZM, Lu D. Effect and Mechanism of Solvent Properties on Solution Behavior and Films Condensed State Structure for the Semi-rigid Conjugated Polymers. CHINESE JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1007/s10118-021-2555-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Duan B, Zou S, Sun Y, Xu X. Fabrication of tumor-targeting composites based on the triple helical β-glucan through conjugation of aptamer. Carbohydr Polym 2020; 254:117476. [PMID: 33357929 DOI: 10.1016/j.carbpol.2020.117476] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/31/2020] [Accepted: 11/30/2020] [Indexed: 12/13/2022]
Abstract
Herein the nucleic acid aptamers were attached to the polydeoxyadenylic acid (poly(dA)) tail for improving the tumor-targetability and cellular internalization of s-LNT/poly(dA) composite composed of two single chains of triple helical β-glucan lentinan (s-LNT) and one poly(dA) chain. The in vitro results demonstrate that the cellular uptake of s-LNT/poly(dA) composites in MCF-7 cancer cells was enhanced effectively after attaching the aptamer. The as-prepared fluorescin isothiocyanate (FITC)-labelled LNT (LNT-FITC) through grafting was used for tracing the enhanced tumor-targetability of the composites. As a result, the cellular internalization of the LNT-FITC into MCF-7 and 4T1 cancer cells was further increased by the aptamer conjugated to poly(dA). Meanwhile, the in vivo experiments further demonstrate more s-LNT/poly(dA)-aptamer composites were effectively accumulated at the tumor site compared with s-LNT alone. This work provides a novel strategy for fabricating triplex β-glucan as delivery vectors with active tumor-targetability.
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Affiliation(s)
- Bingchao Duan
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Siwei Zou
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Ying Sun
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China
| | - Xiaojuan Xu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China; Hubei Engineering Center of Natural Polymers-based Medical Materials, Wuhan University, Wuhan, 430072, China.
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14
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Meng Y, Lyu F, Xu X, Zhang L. Recent Advances in Chain Conformation and Bioactivities of Triple-Helix Polysaccharides. Biomacromolecules 2020; 21:1653-1677. [PMID: 31986015 DOI: 10.1021/acs.biomac.9b01644] [Citation(s) in RCA: 125] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Natural polysaccharides derived from renewable biomass sources are regarded as environmentally friendly and sustainable polymers. As the third most abundant biomacromolecule in nature, after proteins and nucleic acids, polysaccharides are also closely related with many different life activities. In particular, β-glucans are one of the most widely reported bioactive polysaccharides and are usually considered as biological response modifiers. Among them, β-glucans with triple-helix conformation have been the hottest and most well-researched polysaccharides at present, especially lentinan and schizophyllan, which are clinically used as cancer therapies in some Asian countries. Thus, creation of these active triple-helix polysaccharides is beneficial to the research and development of sustainable "green" biopolymers in the fields of food and life sciences. Therefore, full fundamental research of triple-helix polysaccharides is essential to discover more applications for polysaccharides. In this Review, the recent research progress of chain conformations, bioactivities, and structure-function relationships of triple-helix β-glucans is summarized. The main contents include the characterization methods of the macromolecular conformation, proof of triple helices, bioactivities, and structure-function relationships. We believe that the governments, enterprises, universities, and institutes dealing with the survival and health of human beings can expect the development of natural bioproducts in the future. Hence, a deep understanding of β-glucans with triple-helix chain conformation is necessary for application of natural medicines and biologics for a sustainable world.
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Affiliation(s)
- Yan Meng
- College of Chemistry & Molecule Sciences, Wuhan University, Wuhan 430072, China.,College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China
| | - Fengzhi Lyu
- College of Chemistry & Molecule Sciences, Wuhan University, Wuhan 430072, China
| | - Xiaojuan Xu
- College of Chemistry & Molecule Sciences, Wuhan University, Wuhan 430072, China
| | - Lina Zhang
- College of Chemistry & Molecule Sciences, Wuhan University, Wuhan 430072, China
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15
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Zhang J, Yang M, Cai D, Hao Y, Zhao X, Zhu Y, Zhu H, Yang Z. Composition, coagulation characteristics, and cheese making capacity of yak milk. J Dairy Sci 2019; 103:1276-1288. [PMID: 31864739 DOI: 10.3168/jds.2019-17231] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 10/29/2019] [Indexed: 01/25/2023]
Abstract
Yak is one of the few species of which the rennet-coagulated cheese making characteristics of its milk are still not well understood. This study investigated composition and rennet-induced coagulation properties of milk from 17 individual yak cows in comparison with milk from 32 individual Holstein cows. Yak cows produced milk with generally higher concentrations of milk components. The concentrations of fat, protein, solids-not-fat (SNF), and calcium in yak milk were 1.89-, 1.68-, 1.46-, and 2-fold those in Holstein milk, respectively. The hydrodynamic radii of casein micelles (187.25 nm) and chymosin-induced paracasein (1,620 nm) were about twice the sizes of those found in Holstein milk. Higher concentrations of calcium in yak milk, together with larger sizes of casein micelles, explains the reason for its fast rate of curd formation and firmer curd texture. Optical microrheology analysis also showed that Ca2+ concentration had greater influence on the coagulation of yak milk than on Holstein milk. Cheese making trials with yak and Holstein milk proved the higher cheese yield of yak milk: 1.67-fold that of Holstein milk. Therefore, yak milk could be a suitable source of milk for enzyme-coagulated cheese making.
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Affiliation(s)
- Jian Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, China 100048
| | - Ming Yang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, China 100048
| | - Dongyan Cai
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, China 100048
| | - Yijiang Hao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, China 100048
| | - Xiao Zhao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, China 100048
| | - Yuanhua Zhu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, China 100048
| | - Hong Zhu
- Shijiazhuang Junlebao Dairy Industry Co. Ltd., China 050221
| | - Zhennai Yang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, China 100048.
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16
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Wu C, Huang J, Chu B, Deng J, Zhang Z, Tang S, Wang X, Wang Z, Wang Y. Dynamic and Hierarchically Structured Networks with Tissue-like Mechanical Behavior. ACS NANO 2019; 13:10727-10736. [PMID: 31496233 DOI: 10.1021/acsnano.9b05436] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Collagen is the most abundant structural protein in soft tissues, and the duplication of its structure and mechanics represents a key challenge to nanotechnology. Here we report a fibrous supramolecular network that can mimic nearly all of the aspects of collagen from dynamic hierarchical architecture to nonlinear mechanical behavior. This complex self-assembly system is solely based on a glucose polymer: curdlan, which is synthesized by bacteria and can form a similar triple helix as collagen. Triggered by solvent and temperature cues, free curdlan chains wind into superhelical trimers, and the trimers then bundle hexagonally into nanofibers of 20-40 nm in diameter. The fibers are interconnected in a water-rich 3D network structure. The network is highly dynamic and stress-responsive, which can shift from isotropic to anisotropic organization by the winding/unwinding of stress-induced interfiber triple helical net-points. Mechanical tests show that these nanofiber networks exhibit similar nonlinear elasticity as collagenous tissues including skin and tendon. The supramolecular networks also display a very wide range of tensile strength from ∼60 KPa to ∼50 MPa depending on the specific network organization. These biomimetic and dynamic supernetworks may have applications in tissue engineering, drug delivery systems, artificial skin, and soft robotics.
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Affiliation(s)
- Chaoxi Wu
- Guangzhou Jinan Biomedicine Research and Development Center, Institute of Biomedicine, College of Life Science and Technology , Jinan University , Guangzhou , 510632 , China
- Integrated Chinese and Western Medicine Postdoctoral Research Station , Jinan University , Guangzhou , 510632 , China
| | - Jintao Huang
- Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System , Guangdong Pharmaceutical University , Guangzhou , 510006 , China
| | - Bin Chu
- Key Laboratory of Biomedical Materials and Implants , Research Institute of Tsinghua University in Shenzhen , Shenzhen , 518057 , China
| | - Jianping Deng
- Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System , Guangdong Pharmaceutical University , Guangzhou , 510006 , China
| | - Zhen Zhang
- Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System , Guangdong Pharmaceutical University , Guangzhou , 510006 , China
| | - Shunqing Tang
- Biomedical Engineering Institute , Jinan University , Guangzhou , 510632 , China
| | - Xiaoying Wang
- Biomedical Engineering Institute , Jinan University , Guangzhou , 510632 , China
| | - Zhiping Wang
- Guangdong Provincial Engineering Center of Topical Precise Drug Delivery System , Guangdong Pharmaceutical University , Guangzhou , 510006 , China
| | - Yifei Wang
- Guangzhou Jinan Biomedicine Research and Development Center, Institute of Biomedicine, College of Life Science and Technology , Jinan University , Guangzhou , 510632 , China
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Inhibition of tumor growth by β-glucans through promoting CD4+ T cell immunomodulation and neutrophil-killing in mice. Carbohydr Polym 2019; 213:370-381. [DOI: 10.1016/j.carbpol.2019.03.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 02/26/2019] [Accepted: 03/03/2019] [Indexed: 12/16/2022]
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18
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Zhou FF, Zhang YD, Zhang Q, Lu J, Liu Y, Wang JH. Structure characterization and immunological activity of a β-glucan from White H. marmoreus and its silver nanoparticle derivatives. Carbohydr Polym 2019; 210:1-8. [DOI: 10.1016/j.carbpol.2019.01.057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 01/02/2019] [Accepted: 01/16/2019] [Indexed: 10/27/2022]
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19
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Yi HL, Hua CC. Peculiar Aggregation Features in Poly(3-hexylthiophene)/Chlorobenzene Solutions. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02619] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Han-Liou Yi
- Department of Chemical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan
| | - Chi-Chung Hua
- Department of Chemical Engineering, National Chung Cheng University, Chiayi 62102, Taiwan
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20
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Effect of steeping temperature on antioxidant and inhibitory activities of green tea extracts against α-amylase, α-glucosidase and intestinal glucose uptake. Food Chem 2017; 234:168-173. [DOI: 10.1016/j.foodchem.2017.04.151] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 04/21/2017] [Accepted: 04/25/2017] [Indexed: 02/06/2023]
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21
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Li Q, Li W, Gao Q, Zou Y. Hypoglycemic Effect of Chinese Yam (Dioscorea opposita rhizoma
) Polysaccharide in Different Structure and Molecular Weight. J Food Sci 2017; 82:2487-2494. [DOI: 10.1111/1750-3841.13919] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 08/11/2017] [Accepted: 08/14/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Qian Li
- Carbohydrate Lab, School of Food Science and Engineering; South China Univ. of Technology; Guangzhou 510640 P.R. China
- Sericultural & Agri-Food Research Inst. Guangdong Acad. of Agricultural Sciences; Guangzhou 510610 P.R. China
| | - Wenzhi Li
- Carbohydrate Lab, School of Food Science and Engineering; South China Univ. of Technology; Guangzhou 510640 P.R. China
- Infinitus (China) Company Ltd; Jiangmen Guangdong 529156 P.R. China
| | - Qunyu Gao
- Carbohydrate Lab, School of Food Science and Engineering; South China Univ. of Technology; Guangzhou 510640 P.R. China
| | - Yuxiao Zou
- Sericultural & Agri-Food Research Inst. Guangdong Acad. of Agricultural Sciences; Guangzhou 510610 P.R. China
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22
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Microwave-assisted synthesis, structure and anti-tumor activity of selenized Artemisia sphaerocephala polysaccharide. Int J Biol Macromol 2017; 95:1108-1118. [DOI: 10.1016/j.ijbiomac.2016.10.101] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 09/30/2016] [Accepted: 10/30/2016] [Indexed: 01/24/2023]
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23
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Yi HL, Lai LJ, Jiang JS, Hua CC. Ethylcellulose Colloids Incubated in Dilute Solution. J Phys Chem B 2017; 121:638-648. [PMID: 28035827 DOI: 10.1021/acs.jpcb.6b09976] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study revealed, for the first time, that dilute solutions made of a representative series of commercial ethylcellulose (EC; molecular weights 77-305 kDa, provided by the manufacturer) and four distinct organic solvents (α-terpineol, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate (TPIB), tetrahydrofuran (THF), and benzene) can be used to foster stabilized, nearly monodisperse, nanoscale (pure) polymer colloid, with no isolated chains present. Using combined light-scattering (dynamic light scattering, static form factor, and Zimm/Berry plots) and intrinsic viscosity (Tanglertpaibul-Rao, Huggins, and Kraemer plots) analyses, the structural features of colloidal EC aggregates, ρ = ⟨Rg⟩/⟨Rh⟩ = 0.67-0.83, were first shown to be described rather well by the theory on colloidal spheres (⟨Rg⟩ and ⟨Rh⟩ being the mean radius of gyration and the hydrodynamic radius, respectively). An empirical scaling law relating the intrinsic viscosity to the mean colloid size can thus be established: [η]H = (1.7 ± 0.2) ×10-3 ⟨Rh⟩(2.1±0.3) ([η]H and ⟨Rh⟩ in units of mL/g and nm, respectively), which may be contrasted with the Zimm model for isolated Gaussian coils, [η]H ∼ ⟨Rh⟩1, and the Einstein equation for isolated solid spheres, [η]H ∼ ⟨Rh⟩0. Optical microscopy images of thin films cast from different EC solutions clearly revealed the abundance of micron EC agglomerates, contrary to the uniform thin-film morphology produced from a dilute polystyrene solution, which serves as a reference solution composed of isolated chains. These observations point to new features and applications of EC dispersions.
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Affiliation(s)
- Han-Liou Yi
- Department of Chemical Engineering, National Chung Cheng University , Chiayi 62102, Taiwan, ROC
| | - Liang-Je Lai
- Department of Chemical Engineering, National Chung Cheng University , Chiayi 62102, Taiwan, ROC
| | - Jung-Shiun Jiang
- Department of Chemical Engineering, National Chung Cheng University , Chiayi 62102, Taiwan, ROC
| | - Chi-Chung Hua
- Department of Chemical Engineering, National Chung Cheng University , Chiayi 62102, Taiwan, ROC
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24
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Liu Q, Duan B, Xu X, Zhang L. Progress in rigid polysaccharide-based nanocomposites with therapeutic functions. J Mater Chem B 2017; 5:5690-5713. [DOI: 10.1039/c7tb01065f] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Nanocomposites engineered by incorporating versatile nanoparticles into different bioactive β-glucan matrices display effective therapeutic functions.
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Affiliation(s)
- Qingye Liu
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
- College of Chemical and Environmental Engineering
| | - Bingchao Duan
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Xiaojuan Xu
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
| | - Lina Zhang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
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25
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Synthesis of selenium-containing Artemisia sphaerocephala polysaccharides: Solution conformation and anti-tumor activities in vitro. Carbohydr Polym 2016; 152:70-78. [DOI: 10.1016/j.carbpol.2016.06.090] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 06/21/2016] [Accepted: 06/22/2016] [Indexed: 01/04/2023]
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26
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Xu S, Ping Z, Xu X, Zhang L. Changes in shape and size of the stiff branched β-glucan in dimethlysulfoxide/water solutions. Carbohydr Polym 2016; 138:86-93. [DOI: 10.1016/j.carbpol.2015.11.049] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Revised: 10/25/2015] [Accepted: 11/18/2015] [Indexed: 01/14/2023]
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27
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Single chain morphology and nanofiber-like aggregates of branched β-(1→3)- d -glucan in water/dimethylsulfoxide solution. Carbohydr Polym 2016; 137:287-294. [DOI: 10.1016/j.carbpol.2015.10.090] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 09/21/2015] [Accepted: 10/28/2015] [Indexed: 01/30/2023]
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28
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Regioselective sulfation of Artemisia sphaerocephala polysaccharide: Solution conformation and antioxidant activities in vitro. Carbohydr Polym 2016; 136:527-36. [DOI: 10.1016/j.carbpol.2015.09.073] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/20/2015] [Accepted: 09/23/2015] [Indexed: 11/23/2022]
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29
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Wang JH, Xu JL, Zhang JC, Liu Y, Sun HJ, Zha X. Physicochemical properties and antioxidant activities of polysaccharide from floral mushroom cultivated in Huangshan Mountain. Carbohydr Polym 2015; 131:240-7. [DOI: 10.1016/j.carbpol.2015.05.052] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/15/2015] [Accepted: 05/25/2015] [Indexed: 11/26/2022]
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30
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Structural features of a novel polysaccharide isolated from a New Zealand Maori mushroom Iliodiction cibarium. Carbohydr Res 2015; 406:19-26. [PMID: 25658062 DOI: 10.1016/j.carres.2014.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 12/03/2014] [Accepted: 12/22/2014] [Indexed: 11/20/2022]
Abstract
A purified water-soluble fraction (ICP5) of a polysaccharide, isolated from a local Maori mushroom Iliodiction cibarium in New Zealand, was investigated for its structural properties. Size exclusion chromatography and dynamic light scattering showed that ICP5 had a large MW of 1.6 × 10(5) Da with a hydrodynamic diameter of 83 ± 8 nm. Particle size measurements also displayed the tendency of ICP5 to aggregate when suspended in water. The results of GC-MS, FTIR and NMR analyses allowed some characteristics of the chemical structure of ICP5 to be determined. GC-MS results showed that ICP5 contained only glucose (81.61%), galactose (12.90%) and mannose (5.49%) monomers. The characterized fragment structures of ICP5 were found to be dominantly consisting of uronic acids, which formed a backbone containing 1,4-β-D-GlcpA. A small amount of unsaturated uronic acid also appeared to be present.
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31
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Fan C, Zhang C, Liao L, Li S, Gan W, Zhou J, Wang DA, Liu L. Preparation and characterization of double macromolecular network (DMMN) hydrogels based on hyaluronan and high molecular weight poly(ethylene glycol). J Mater Chem B 2015; 3:6618-6625. [DOI: 10.1039/c5tb00867k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ultra-strong and resilient double macromolecular network (DMMN) hydrogels with a more evenly distributed polymer network and a double-network structure have been developed.
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Affiliation(s)
- Changjiang Fan
- Key Laboratory of Biomedical Polymers of Ministry of Education & College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- P. R. China
- School of Chemical and Biomedical Engineering
| | - Chao Zhang
- School of Engineering
- Sun Yat-Sen University
- Guangzhou
- P. R. China
| | - Liqiong Liao
- Key Laboratory of Biomedical Polymers of Ministry of Education & College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- P. R. China
| | - Sheng Li
- Key Laboratory of Biomedical Polymers of Ministry of Education & College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- P. R. China
| | - Weiping Gan
- Key Laboratory of Biomedical Polymers of Ministry of Education & College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- P. R. China
| | - Jinping Zhou
- Key Laboratory of Biomedical Polymers of Ministry of Education & College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- P. R. China
| | - Dong-An Wang
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637457
- Singapore
| | - Lijian Liu
- Key Laboratory of Biomedical Polymers of Ministry of Education & College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- P. R. China
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32
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Li S, Huang Y, Wang S, Xu X, Zhang L. Determination of the Triple Helical Chain Conformation of β-Glucan by Facile and Reliable Triple-Detector Size Exclusion Chromatography. J Phys Chem B 2014; 118:668-75. [DOI: 10.1021/jp4087199] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sheng Li
- Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Yao Huang
- Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Sen Wang
- Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Xiaojuan Xu
- Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Lina Zhang
- Department of Chemistry, Wuhan University, Wuhan 430072, China
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33
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Xu X, Yan H, Tang J, Chen J, Zhang X. Polysaccharides inLentinus edodes: Isolation, Structure, Immunomodulating Activity and Future Prospective. Crit Rev Food Sci Nutr 2013; 54:474-87. [DOI: 10.1080/10408398.2011.587616] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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34
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Xu S, Xu X, Zhang L. Effect of Heating on Chain Conformation of Branched β-Glucan in Water. J Phys Chem B 2013; 117:8370-7. [DOI: 10.1021/jp403202u] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Shuqin Xu
- Department
of Chemistry, Wuhan University, Wuhan 430072,
China
| | - Xiaojuan Xu
- Department
of Chemistry, Wuhan University, Wuhan 430072,
China
| | - Lina Zhang
- Department
of Chemistry, Wuhan University, Wuhan 430072,
China
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35
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Shibakami M, Tsubouchi G, Nakamura M, Hayashi M. Preparation of carboxylic acid-bearing polysaccharide nanofiber made from euglenoid β-1,3-glucans. Carbohydr Polym 2013; 98:95-101. [PMID: 23987321 DOI: 10.1016/j.carbpol.2013.05.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 05/11/2013] [Accepted: 05/14/2013] [Indexed: 11/19/2022]
Abstract
This paper introduces a new strategy for creating surface modified polysaccharide nanofibers. To demonstrate proof of principle, the synthesis, structure, and self-assembly behavior of a carboxylic acid-bearing polysaccharide made from paramylon (β-1,3-glucan) and succinic anhydride were investigated. Examination by a combination of NMR, FT-IR, and SEC-MALLS confirmed that successful preparation of the desired succinylated paramylon without significant depolymerization. NMR, SEC-MALLS, visible absorption and CD spectroscopic analyses indicated that the paramylon derivative forms the triplex structure in solutions. SEM observation revealed that succinylated paramylon forms a nanofiber that has carboxylic acid on the surface.
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Affiliation(s)
- Motonari Shibakami
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6th, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
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36
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Shibakami M, Tsubouchi G, Nakamura M, Hayashi M. Polysaccharide nanofiber made from euglenoid alga. Carbohydr Polym 2012; 93:499-505. [PMID: 23499089 DOI: 10.1016/j.carbpol.2012.12.040] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 12/07/2012] [Accepted: 12/12/2012] [Indexed: 12/18/2022]
Abstract
We have fabricated a polysaccharide nanofiber made from paramylon (β-1,3-glucan), a storage polysaccharide stored as a micrometer-sized particle in the cell of euglenoid alga. Preparation of this nanofiber primarily hinges on the bottom-up approach. First, paramylon, which is originally present in the form of a bundle of nanofibers in a particle, was fibrillated to a randomly coiled polymer by dissolving the particle in a 1.0-mol/L NaOH aqueous solution. Second, the randomly coiled polymer was allowed to self-assemble into a triplex as the NaOH concentration was reduced to 0.25-0.20mol/L. Third, a 20-nm-width nanofiber made from the triplex emerged in the solution when the NaOH concentration was reduced to approximately 0.20mol/L.
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Affiliation(s)
- Motonari Shibakami
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, Central 6th, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
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37
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Molecular characterization and hypoglycemic activity of a novel water-soluble polysaccharide from tea (Camellia sinensis) flower. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.05.039] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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38
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Li S, Zhang Y, Xu X, Zhang L. Triple helical polysaccharide-induced good dispersion of silver nanoparticles in water. Biomacromolecules 2011; 12:2864-71. [PMID: 21542604 DOI: 10.1021/bm2001439] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Silver nanoparticles were constructed by using triple helical polysaccharide (lentinan) dissolved in water as matrix for the first time. The structure, morphology, and size of the nanocomposites in the polysaccharide aqueous solutions were investigated with UV-visible spectroscopy (UV-vis), transmission electron microscopy (TEM), and dynamic laser light scattering (DLS). The results revealed that the silver nanoparticles were attached to the polysaccharide chains through the strong noncovalent interactions, leading to the good dispersion of silver nanoparticles with mean radius of 6 nm in water. The silver nanoparticles were stable in the lentinan aqueous solution for 9 months. However, with an addition of NaOH, the polysaccharide with the imperfect helical structure broken partially by NaOH could aggregate in the alkali aqueous solution. The aggregation of the lentinan-bonded silver nanoparticles increased with an increase in the NaOH concentration, whereas the size of the silver nanoparticles barely changed, further confirming that the Ag nanoparticles were stable in this system. The aggregation was related to the conformation transition of the polysaccharide from the triple helix to random coil in the solution. A new method to detect the aggregates and aggregation rate was established according to the intensity of the maximum absorption peaks of the polysaccharide labeled by Ag nanoparticles in the UV spectrum.
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Affiliation(s)
- Sheng Li
- Department of Chemistry, Wuhan University, Wuhan 430072, China
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