1
|
Tomofuji Y, Matsuo K, Terao K. Kinetics of denaturation and renaturation processes of double-stranded helical polysaccharide, xanthan in aqueous sodium chloride. Carbohydr Polym 2022; 275:118681. [PMID: 34742411 DOI: 10.1016/j.carbpol.2021.118681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/12/2021] [Accepted: 09/15/2021] [Indexed: 11/02/2022]
Abstract
Circular dichroism (CD) and small-angle X-ray scattering (SAXS) measurements were made for three xanthan samples, a double helical polysaccharide, in 5 or 10 mM aqueous NaCl after rapid temperature change to investigate the kinetics of the conformational change between the ordered and disordered states. After the rapid heating, the CD signal mainly reflecting the carbonyl groups on the side chains quickly changed (<150 s) while the scattering intensity from SAXS around q (magnitude of the scattering vector) = 1 nm-1 changed more gradually, reflecting the main-chain conformation. The difference between CD and SAXS implies us the intermediate conformation which can be regarded as a loose double helix. The SAXS profile in the rapid cooling process showed that the loose double helical structure was constructed within 150 s, but the CD signal slowly changed with around 2 days to recover the native tight double helix.
Collapse
Affiliation(s)
- Yu Tomofuji
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1, Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
| | - Koichi Matsuo
- Hiroshiema Synchrotron Radiation Center, Hiroshima University, Kagamiyama, Higashi-hiroshima, Hiroshima 739-0046, Japan.
| | - Ken Terao
- Department of Macromolecular Science, Graduate School of Science, Osaka University, 1-1, Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan.
| |
Collapse
|
2
|
Rani G, Kuroda K, Vemparala S. Aggregation of methacrylate-based ternary biomimetic antimicrobial polymers in solution. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 33:064003. [PMID: 33105118 DOI: 10.1088/1361-648x/abc4c9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Using detailed atomistic simulations, we explore the morphological characteristics of aggregates formed in solution phase by ternary biomimetic antimicrobial (AM) methacrylate polymers, composed of hydrophobic, charged cationic and polar functional groups and compare it with aggregate morphologies of binary methacrylate polymers, composed only of hydrophobic and charged cationic functional groups. The effect of sequence of the constituent functional groups on aggregate conformation is also studied by considering random and block sequences along the polymer backbone. Our results show that while binary polymers tend to form robust aggregates, replacing some of the hydrophobic groups with overall charge neutral polar groups weakens the aggregate considerably, leading to increased conformational fluctuations and formation of loose-packed, open aggregates, particularly in the case of random ternary polymers. Interaction energy calculations clearly suggest that the role of inclusion of polar groups in ternary polymers is two-fold: (1) to reduce possible strong local concentration of hydrophobic groups and 'smear' the overall hydrophobicity along the polymer backbone to increase the solubility of the polymers (2) to compensate the loss of attractive hydrophobic interactions by forming attractive electrostatic interactions with the charged groups and contribute to aggregation formation, albeit weak. Given that most of the naturally occurring AM peptides have contributions from all the three functional groups, this study elucidates the functionally tuneable role of inclusion of polar groups in the way AM agents interact with each other in solution phase, which can eventually dictate their partitioning behaviour into bacterial and mammalian membranes.
Collapse
Affiliation(s)
- Garima Rani
- The Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai 600113, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - Kenichi Kuroda
- Department of Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, Michigan 48109, United States of America
| | - Satyavani Vemparala
- The Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai 600113, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| |
Collapse
|
3
|
Yang Y, Hashidzume A. A New Associative Diblock Copolymer of Poly(ethylene glycol) and Dense 1,2,3‐Triazole Blocks: Self‐Association Behavior and Thermoresponsiveness in Water. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900317] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yanqiong Yang
- Department of Macromolecular ScienceGraduate School of Science Osaka University Toyonaka Osaka 560‐0043 Japan
| | - Akihito Hashidzume
- Department of Macromolecular ScienceGraduate School of Science Osaka University Toyonaka Osaka 560‐0043 Japan
| |
Collapse
|
4
|
Korde JM, Kandasubramanian B. Fundamentals and Effects of Biomimicking Stimuli-Responsive Polymers for Engineering Functions. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b00683] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jay M. Korde
- Biocomposite Laboratory, Department of Metallurgical & Materials Engineering, DIAT (DU), Ministry of Defence, Girinagar, Pune-411025, India
| | - Balasubramanian Kandasubramanian
- Biocomposite Laboratory, Department of Metallurgical & Materials Engineering, DIAT (DU), Ministry of Defence, Girinagar, Pune-411025, India
| |
Collapse
|
5
|
Miwa S, Takahashi R, Rössel C, Matsumoto S, Fujii S, Lee JH, Schacher FH, Sakurai K. Core-Shell-Corona Micelles from a Polyether-Based Triblock Terpolymer: Investigation of the pH-Dependent Micellar Structure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:7813-7820. [PMID: 29884021 DOI: 10.1021/acs.langmuir.8b01168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Core-shell-corona micelles featuring a pH-responsive shell have been characterized in dilute aqueous solution at different pH values (4-8) by using dynamic light scattering (DLS), field-flow fractionation coupled with multiangle light scattering detector (FFF-MALS), steady-state fluorescence, small-angle X-ray scattering (SAXS), and cryogenic transmission electron microscopy (cryo-TEM). The micelles are formed by self-assembly of a polyether-based triblock terpolymer consisting of a hydrophobic poly( tert-butyl glycidyl ether) block (P tBGE), a pH-responsive modified poly(allyl glycidyl ether) segment (PAGECOOH), and a neutral hydrophilic poly(ethylene oxide) block (PEO). Because of the side-chain carboxylic acids in the middle block, the micellar structure and size depends on the solution pH. Hereby, we show that an increase in pH induces a decrease in the aggregation number ( Nagg). In addition, the combination of the above measurements revealed an unexpected morphological change from spherical to ellipsoidal micelles by increasing pH.
Collapse
Affiliation(s)
- Shotaro Miwa
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1, Hibikino, Wakamatsu-ku , Kitakyushu , Fukuoka 808-0135 , Japan
| | - Rintaro Takahashi
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1, Hibikino, Wakamatsu-ku , Kitakyushu , Fukuoka 808-0135 , Japan
| | - Carsten Rössel
- Institute of Organic Chemistry and Macromolecular Chemistry , Friedrich Schiller University Jena , Lessingstraße 8 , D-07743 Jena , Germany
- Jena Center for Soft Matter (JCSM) , Friedrich Schiller University Jena , Philosophenweg 7 , 07743 Jena , Germany
| | - Sakiko Matsumoto
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1, Hibikino, Wakamatsu-ku , Kitakyushu , Fukuoka 808-0135 , Japan
| | - Shota Fujii
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1, Hibikino, Wakamatsu-ku , Kitakyushu , Fukuoka 808-0135 , Japan
| | - Ji Ha Lee
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1, Hibikino, Wakamatsu-ku , Kitakyushu , Fukuoka 808-0135 , Japan
| | - Felix H Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry , Friedrich Schiller University Jena , Lessingstraße 8 , D-07743 Jena , Germany
- Jena Center for Soft Matter (JCSM) , Friedrich Schiller University Jena , Philosophenweg 7 , 07743 Jena , Germany
| | - Kazuo Sakurai
- Department of Chemistry and Biochemistry , University of Kitakyushu , 1-1, Hibikino, Wakamatsu-ku , Kitakyushu , Fukuoka 808-0135 , Japan
| |
Collapse
|
6
|
Aggregation of Cationic Amphiphilic Block and Random Copoly(vinyl ether)s with Antimicrobial Activity. Polymers (Basel) 2018; 10:polym10010093. [PMID: 30966128 PMCID: PMC6414987 DOI: 10.3390/polym10010093] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 01/14/2018] [Accepted: 01/16/2018] [Indexed: 01/01/2023] Open
Abstract
In this study, we investigated the aggregation behaviors of amphiphilic poly(vinyl ether)s with antimicrobial activity. We synthesized a di-block poly(vinyl ether), B3826, composed of cationic primary amine and hydrophobic isobutyl (iBu) side chains, which previously showed antimicrobial activity against Escherichia coli. B3826 showed similar uptake behaviors as those for a hydrophobic fluorescent dye, 1,6-diphenyl-1,3,5-hexatriene, to counterpart polymers including homopolymer H44 and random copolymer R4025, indicating that the iBu block does not form strong hydrophobic domains. The cryo-TEM observations also indicated that the polymer aggregate of B3826 appears to have low-density polymer chains without any defined microscopic structures. We speculate that B3826 formed large aggregates by liquid-liquid separation due to the weak association of polymer chains. The fluorescence microscopy images showed that B3826 bonds to E. coli cell surfaces, and these bacterial cells were stained by propidium iodide, indicating that the cell membranes were significantly damaged. The results suggest that block copolymers may provide a new platform to design and develop antimicrobial materials that can utilize assembled structures and properties.
Collapse
|
7
|
Gao Y, Wei M, Li X, Xu W, Ahiabu A, Perdiz J, Liu Z, Serpe MJ. Stimuli-responsive polymers: Fundamental considerations and applications. Macromol Res 2017. [DOI: 10.1007/s13233-017-5088-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
8
|
Takahashi R, Sato T, Terao K, Yusa SI. Reversible Vesicle–Spherical Micelle Transition in a Polyion Complex Micellar System Induced by Changing the Mixing Ratio of Copolymer Components. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00308] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Rintaro Takahashi
- Department
of Macromolecular Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Takahiro Sato
- Department
of Macromolecular Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Ken Terao
- Department
of Macromolecular Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043, Japan
| | - Shin-ichi Yusa
- Department
of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
| |
Collapse
|
9
|
Okuhara T, Hashidzume A, Terao K, Sato T. Aggregation and phase separation of hydrophilically modified poly(dimethylsiloxane) in methanol–water mixtures. Polym J 2014. [DOI: 10.1038/pj.2014.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
|
10
|
Aggregation behavior of polystyrene-based amphiphilic diblock copolymers in organic media. Polym J 2013. [DOI: 10.1038/pj.2013.80] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
11
|
Sato T, Tanaka K, Toyokura A, Mori R, Takahashi R, Terao K, Yusa SI. Self-Association of a Thermosensitive Amphiphilic Block Copolymer Poly(N-isopropylacrylamide)-b-poly(N-vinyl-2-pyrrolidone) in Aqueous Solution upon Heating. Macromolecules 2012. [DOI: 10.1021/ma3020992] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takahiro Sato
- Department of Macromolecular Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka,
Osaka 560-0043, Japan
| | - Kohei Tanaka
- Department of Macromolecular Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka,
Osaka 560-0043, Japan
| | - Akiko Toyokura
- Department of Macromolecular Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka,
Osaka 560-0043, Japan
| | - Rika Mori
- Department of Macromolecular Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka,
Osaka 560-0043, Japan
| | - Rintaro Takahashi
- Department of Macromolecular Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka,
Osaka 560-0043, Japan
| | - Ken Terao
- Department of Macromolecular Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka,
Osaka 560-0043, Japan
| | - Shin-ichi Yusa
- Department
of Materials Science and Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280,
Japan
| |
Collapse
|
12
|
Lee HJ, Bae Y. Pharmaceutical Differences Between Block Copolymer Self-Assembled and Cross-Linked Nanoassemblies as Carriers for Tunable Drug Release. Pharm Res 2012; 30:478-88. [DOI: 10.1007/s11095-012-0893-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Accepted: 09/24/2012] [Indexed: 12/12/2022]
|
13
|
Lee JY, Lee SH, Oh MH, Kim JS, Park TG, Nam YS. Prolonged gene silencing by siRNA/chitosan-g-deoxycholic acid polyplexes loaded within biodegradable polymer nanoparticles. J Control Release 2012; 162:407-13. [PMID: 22800573 DOI: 10.1016/j.jconrel.2012.07.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 06/14/2012] [Accepted: 07/04/2012] [Indexed: 12/11/2022]
Abstract
Recently, small interfering RNA (siRNA) has received much attention for therapeutic applications; however, low transfection efficiency and intrinsic instability limit effective gene silencing. Here we show a new approach based on the incorporation of siRNA/polyelectrolyte complexes into biodegradable poly(d,l-lactic-co-glycolic acid) (PLGA) nanoparticles to stabilize siRNA within a hydrophobic solid matrix for prolonged gene silencing. To solubilize siRNA in organic media, chitosan oligosaccharides grafted with deoxycholic acids are synthesized and complexed with siRNA, generating a self-assembled polyelectrolyte complex of 123.9 ± 56.8 nm in diameter. The complex is mixed with PLGA solution and emulsified in water to prepare siRNA-loaded PLGA nanoparticles having a diameter of about 230 nm. The excellent structural stability of the prepared nanoparticles leads to efficient cellular uptake followed by effective gene silencing even in the presence of serum proteins. These results suggest that the encapsulation of siRNA into biodegradable polymer matrix can be an effective means of improving the structural stability of siRNA for prolonged therapeutic efficacy.
Collapse
Affiliation(s)
- Jeong Yu Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
| | | | | | | | | | | |
Collapse
|
14
|
Oda Y, Kanaoka S, Sato T, Aoshima S, Kuroda K. Block versus Random Amphiphilic Copolymers as Antibacterial Agents. Biomacromolecules 2011; 12:3581-91. [DOI: 10.1021/bm200780r] [Citation(s) in RCA: 158] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Yukari Oda
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Shokyoku Kanaoka
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Takahiro Sato
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Sadahito Aoshima
- Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Kenichi Kuroda
- Department of Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| |
Collapse
|
15
|
Illy N, Boileau S, Buchmann W, Penelle J, Barbier V. Control of End Groups in Anionic Polymerizations Using Phosphazene Bases and Protic Precursors As Initiating System (XH-ButP4 Approach): Application to the Ring-Opening Polymerization of Cyclopropane-1,1-Dicarboxylates. Macromolecules 2010. [DOI: 10.1021/ma1016506] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicolas Illy
- Institut de Chimie et des Matériaux Paris-Est (ICMPE), Université Paris Est and CNRS, 2-8 rue Henri Dunant, 94320 Thiais, France
| | - Sylvie Boileau
- Institut de Chimie et des Matériaux Paris-Est (ICMPE), Université Paris Est and CNRS, 2-8 rue Henri Dunant, 94320 Thiais, France
| | - William Buchmann
- Laboratoire Analyse et Modélisation pour la Biologie et l’Environnement (LAMBE), Université d'Evry-Val-d'Essonne and CNRS, Boulevard François Mitterrand, 91025 Evry Cedex, France
| | - Jacques Penelle
- Institut de Chimie et des Matériaux Paris-Est (ICMPE), Université Paris Est and CNRS, 2-8 rue Henri Dunant, 94320 Thiais, France
| | - Valessa Barbier
- Institut de Chimie et des Matériaux Paris-Est (ICMPE), Université Paris Est and CNRS, 2-8 rue Henri Dunant, 94320 Thiais, France
| |
Collapse
|
16
|
Matsuda Y, Biyajima Y, Sato T. Thermal Denaturation, Renaturation, and Aggregation of a Double-Helical Polysaccharide Xanthan in Aqueous Solution. Polym J 2009. [DOI: 10.1295/polymj.pj2008300] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|