1
|
Yuan Z, Ding J, Zhang Y, Huang B, Song Z, Meng X, Ma X, Gong X, Huang Z, Ma S, Xiang S, Xu W. Components, mechanisms and applications of stimuli-responsive polymer gels. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
2
|
Shang P, Wu J, Shi X, Wang Z, Song F, Liu S. Synthesis of Thermo-Responsive Block-Graft Copolymer Based on PCL and PEG Analogs, and Preparation of Hydrogel via Click Chemistry. Polymers (Basel) 2019; 11:E765. [PMID: 31052405 PMCID: PMC6572280 DOI: 10.3390/polym11050765] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/10/2019] [Accepted: 04/20/2019] [Indexed: 01/05/2023] Open
Abstract
Thermo-responsive cross-linkable mPEG-b-[PCL-g-(MEO2MA-co-OEGMA)]-b-mPEG was synthesized by ring-opening polymerization (ROP) and atom transfer radical polymerization (ATRP). Then, the cross-linkable block-graft copolymer was used to prepare hydrogel via a copper-catalyzed 1,3-dipolar azide-alkyne cycloaddition reaction. The chemical structure and composition of copolymer were characterized by proton nuclear magnetic resonance (1H NMR), Fourier-transform infrared (FT-IR) and gel permeation chromatography (GPC). The self-assembly behaviors of the copolymer in aqueous solution were studied by UV spectrophotometer, fluorescence probes, the surface tension method, dynamic light scattering, and transmission electron microscopy. The results proved that the copolymer has excellent solubility and better temperature response. The three-dimensional network structure of the gels, observed by scanning electron microscopy at different temperatures, indicated that the gels have temperature response.
Collapse
Affiliation(s)
- Pei Shang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Jie Wu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Xiaoyu Shi
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Zhidan Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Fei Song
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| | - Shouxin Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
| |
Collapse
|
3
|
Liu S, Tian L, Mao H, Ning W, Shang P, Wu J, Shi X. Micellization and sol-gel transition of novel thermo- and pH-responsive ABC triblock copolymer synthesized by RAFT. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1658-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
4
|
Onoda M, Ueki T, Tamate R, Akimoto AM, Hall CC, Lodge TP, Yoshida R. Precisely Tunable Sol-Gel Transition Temperature by Blending Thermoresponsive ABC Triblock Terpolymers. ACS Macro Lett 2018; 7:950-955. [PMID: 35650971 DOI: 10.1021/acsmacrolett.8b00477] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Here, we report a facile methodology to control the sol-gel transition temperature (Tgel) of a physically cross-linked hydrogel by blending two kinds of ABC triblock terpolymers. Well-defined triblock terpolymers including thermosensitive N-isopropylacrylamide (NIPAAm), ABC1, and ABC2, were prepared by sequential reversible addition-fragmentation chain transfer polymerization. The chemical structure as well as the molecular weight of the A and B blocks for both polymers are identical, whereas the C blocks are different. The C block of ABC1 (C1) is a statistical copolymer of NIPAAm with hydrophobic n-butyl acrylate (BA), while that of ABC2 (C2) is a PNIPAAm homopolymer. Independently prepared ABC triblock terpolymer solutions exhibit well-defined sol-gel transitions. The Tgel of ABC1 is lower than that of ABC2 since hydrophobic BA is copolymerized into block C1. Remarkably, the Tgel varies linearly within this temperature range by simply blending the two polymers, while the resultant gel strength (∼G') remains almost unchanged. Therefore, the Tgel can be precisely adjusted by the mixing ratio of the two polymers. This method for straightforward manipulation of Tgel has great potential for various soft material applications such as biomaterials for tissue engineering, drug delivery systems, and injectable gels.
Collapse
Affiliation(s)
- Michika Onoda
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takeshi Ueki
- International Research Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Ryota Tamate
- Department of Chemistry & Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
| | - Aya M. Akimoto
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Cecilia C. Hall
- Department of Chemistry, University of Minnesota, 207 Pleasant Street S.E., Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department of Chemistry, University of Minnesota, 207 Pleasant Street S.E., Minneapolis, Minnesota 55455, United States
- Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue S.E., Minneapolis, Minnesota 55455, United States
| | - Ryo Yoshida
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| |
Collapse
|
5
|
Liu M, Lu X, Gao L, Wang S, Huo Y, Chen ZN. Polyvinyl Alcohol-Based Thermogel with Tunable Gelation and Self-Healing Property. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800162] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mengjuan Liu
- School of Chemical Engineering and Light Industry; Department of Applied Chemistry; Guangdong University of Technology; Guangzhou 510006 China
| | - Xiaoxuan Lu
- School of Chemical Engineering and Light Industry; Department of Applied Chemistry; Guangdong University of Technology; Guangzhou 510006 China
| | - Liang Gao
- School of Chemical Engineering and Light Industry; Department of Applied Chemistry; Guangdong University of Technology; Guangzhou 510006 China
| | - Shuting Wang
- School of Chemical Engineering and Light Industry; Department of Applied Chemistry; Guangdong University of Technology; Guangzhou 510006 China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry; Department of Applied Chemistry; Guangdong University of Technology; Guangzhou 510006 China
| | - Zhe-Ning Chen
- Fujian Institute of Research on the Structure of Matter; Chinese Academy of Sciences; 155 Yangqiao Road West Fuzhou 350002 P. R. China
| |
Collapse
|
6
|
Henn DM, Holmes JA, Kent EW, Zhao B. Worm-to-Sphere Shape Transition of Thermoresponsive Linear Molecular Bottlebrushes in Moderately Concentrated Aqueous Solution. J Phys Chem B 2018; 122:7015-7025. [DOI: 10.1021/acs.jpcb.8b04767] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniel M. Henn
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jessica A. Holmes
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Ethan W. Kent
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| |
Collapse
|
7
|
Kent EW, Henn DM, Zhao B. Shape-changing linear molecular bottlebrushes with dually pH- and thermo-responsive diblock copolymer side chains. Polym Chem 2018. [DOI: 10.1039/c8py01137k] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The collapse of inner pH-responsive blocks drives cylindrical-to-globular shape transition while outer thermoresponsive blocks provide additional control of solution state.
Collapse
Affiliation(s)
- Ethan W. Kent
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
| | - Daniel M. Henn
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
| | - Bin Zhao
- Department of Chemistry
- University of Tennessee
- Knoxville
- USA
| |
Collapse
|
8
|
Zhao H, Xu J, Wan J, Geng S, Li H, Peng X, Fu Q, He M, Zhao Y, Yang X. Cisplatin-directed coordination-crosslinking nanogels with thermo/pH-sensitive triblock polymers: improvement on chemotherapic efficacy via sustained release and drug retention. NANOSCALE 2017; 9:5859-5871. [PMID: 28429810 DOI: 10.1039/c7nr01097d] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
To realize the sustained release and long-term intratumoural retention of water-soluble cisplatin, thermo/pH-sensitive cisplatin-directed coordination-crosslinking nanogels (Pt-PNA) were developed via the coordination bonds of Pt-carboxyl groups. As the coordination ratio (CR) of the Pt-carboxyl bonds increased from 5% to 35%, the sizes of the Pt-PNA nanogels decreased from 999 nm to 167 nm, and their zeta potentials increased from -35 mV to -13 mV. Only through a simple mixing of cisplatin and PNAs, the entrapment efficiencies (EEs) of the Pt-PNA nanogels reached near 100% (>90%), and the drug-loading amounts (DLs) of cisplatin could achieve up to 25.5 ± 0.1%. For water-soluble cisplatin, Pt-PNA nanogels exhibited a sustained release for as long as 5 days. The thermo/pH-sensitive sol-gel phase-transition behaviour of the Pt-PNA nanogels were investigated via inverting-vial and rheological methods. Platinum elemental analysis indicated that the Pt-PNA nanogels showed a much stronger ability of cisplatin retention in tumours than free cisplatin. The platinum content in a tumour treated by the Pt-PNA nanogels was far higher than that by free cisplatin: 200.7 ± 63.6 μg vs. 82.7 ± 26.8 μg at the 1st day, or 118.9 ± 35.2 μg vs. 18.5 ± 9.4 μg at the 14th day. The evaluation of the in vivo antitumour efficacy indicated that only after a single dose of Pt-PNA nanogels, the tumour volume continuously decreased to 0.73 ± 0.07 times that of the original tumour volume (OTV) for 14 days; however, it rapidly increased by 3.37 ± 0.82, 8.01 ± 0.53 and 9.25 ± 1.85 times that of the OTV with the same dose of free cisplatin, PNA, and NS, respectively. Some preliminary evaluations of the biocompatibility indicated that the toxic side effects of cisplatin could be greatly improved via cisplatin-directed coordination-crosslinking with PNA. As a result, Pt-PNA nanogels could likely become a promising versatile strategy for improving antitumour efficacy and reducing the toxicity and size effects of platinum-based drugs, and they could also be developed as promising nanomedicines for regional chemotherapy.
Collapse
Affiliation(s)
- Hao Zhao
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, 430074, Wuhan City, P. R. China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
|
10
|
Han Y, Liu S, Mao H, Tian L, Ning W. Synthesis of Novel Temperature- and pH-Sensitive ABA Triblock Copolymers P(DEAEMA-co-MEO₂MA-co-OEGMA)-b-PEG-b-P(DEAEMA-co-MEO₂MA-co-OEGMA): Micellization, Sol⁻Gel Transitions, and Sustained BSA Release. Polymers (Basel) 2016; 8:E367. [PMID: 30974672 PMCID: PMC6431942 DOI: 10.3390/polym8110367] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 10/01/2016] [Accepted: 10/07/2016] [Indexed: 12/01/2022] Open
Abstract
Novel temperature- and pH-responsive ABA-type triblock copolymers, P(DEAEMA-co-MEO₂MA-co-OEGMA)-b-PEG-b-P(DEAEMA-co-MEO₂MA-co-OEGMA), composed of a poly(ethylene glycol) (PEG) middle block and temperature- and pH-sensitive outer blocks, were synthesized by atom transfer radical polymerization (ATRP). The composition and structure of the copolymer were characterized by ¹H NMR and gel permeation chromatography (GPC). The temperature- and pH-sensitivity, micellization, and the sol⁻gel transitions of the triblock copolymers in aqueous solutions were studied using transmittance measurements, surface tension, viscosity, fluorescence probe technique, dynamic light scattering (DLS), zeta-potential measurements, and transmission electron microscopy (TEM). The lower critical solution temperature (LCST) of the triblock copolymer, which contains a small amount of a weak base group, (N,N-diethylamino) ethyl methacrylate (DEAEMA), can be tuned precisely and reversibly by changing the solution pH. When the copolymer concentration was sufficiently high, increasing temperature resulted in the free-flowing solution transformation into a micellar gel. The sol-to-gel transition temperature (Tsol⁻gel) in aqueous solution will continue to decrease as solution concentration increases.
Collapse
Affiliation(s)
- Yanan Han
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Shouxin Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Hongguang Mao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Lei Tian
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Wenyan Ning
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| |
Collapse
|
11
|
Synthesis and sol-gel transition of novel temperature responsive aba triblock-graft copolymers based on PCL and PEG analogues. Macromol Res 2015. [DOI: 10.1007/s13233-015-3089-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
12
|
|
13
|
Thomassin JM, Mathieu K, Kermagoret A, Fustin CA, Jérôme C, Debuigne A. Double thermo-responsive hydrogels from poly(vinylcaprolactam) containing diblock and triblock copolymers. Polym Chem 2015. [DOI: 10.1039/c4py01606h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermally-induced gelation and gel properties of concentrated aqueous solutions of double thermoresponsive poly(N-vinylamide)-based di- and triblock copolymers are studied by rheology.
Collapse
Affiliation(s)
- Jean-Michel Thomassin
- Center for Education and Research on Macromolecules (CERM)
- Chemistry Department
- University of Liege (ULg)
- B-4000 Liège
- Belgium
| | - Kevin Mathieu
- Center for Education and Research on Macromolecules (CERM)
- Chemistry Department
- University of Liege (ULg)
- B-4000 Liège
- Belgium
| | - Anthony Kermagoret
- Center for Education and Research on Macromolecules (CERM)
- Chemistry Department
- University of Liege (ULg)
- B-4000 Liège
- Belgium
| | - Charles-André Fustin
- Institute of Condensed Matter and Nanosciences (IMCN)
- Bio- and Soft Matter division (BSMA)
- Université catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
| | - Christine Jérôme
- Center for Education and Research on Macromolecules (CERM)
- Chemistry Department
- University of Liege (ULg)
- B-4000 Liège
- Belgium
| | - Antoine Debuigne
- Center for Education and Research on Macromolecules (CERM)
- Chemistry Department
- University of Liege (ULg)
- B-4000 Liège
- Belgium
| |
Collapse
|
14
|
Wright RAE, Hu B, Henn DM, Zhao B. Reversible sol–gel transitions of aqueous dispersions of silica nanoparticles grafted with diblock copolymer brushes composed of a thermosensitive inner block and a charged outer block. SOFT MATTER 2015; 11:6808-6820. [DOI: 10.1039/c5sm00617a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
|
15
|
|
16
|
Aurand ER, Wagner JL, Shandas R, Bjugstad KB. Hydrogel formulation determines cell fate of fetal and adult neural progenitor cells. Stem Cell Res 2013; 12:11-23. [PMID: 24141109 PMCID: PMC4687407 DOI: 10.1016/j.scr.2013.09.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 09/09/2013] [Accepted: 09/23/2013] [Indexed: 11/29/2022] Open
Abstract
Hydrogels provide a unique tool for neural tissue engineering. These materials can be customized for certain functions, i.e. to provide cell/drug delivery or act as a physical scaffold. Unfortunately, hydrogel complexities can negatively impact their biocompatibility, resulting in unintended consequences. These adverse effects may be combated with a better understanding of hydrogel chemical, physical, and mechanical properties, and how these properties affect encapsulated neural cells. We defined the polymerization and degradation rates and compressive moduli of 25 hydrogels formulated from different concentrations of hyaluronic acid (HA) and poly(ethylene glycol) (PEG). Changes in compressive modulus were driven primarily by the HA concentration. The in vitro biocompatibility of fetal-derived (fNPC) and adult-derived (aNPC) neural progenitor cells was dependent on hydrogel formulation. Acute survival of fNPC benefited from hydrogel encapsulation. NPC differentiation was divergent: fNPC differentiated into mostly glial cells, compared with neuronal differentiation of aNPC. Differentiation was influenced in part by the hydrogel mechanical properties. This study indicates that there can be a wide range of HA and PEG hydrogels compatible with NPC. Additionally, this is the first study comparing hydrogel encapsulation of NPC derived from different aged sources, with data suggesting that fNPC and aNPC respond dissimilarly within the same hydrogel formulation.
Collapse
Affiliation(s)
- Emily R Aurand
- Neuroscience Program, University of Colorado, Anschutz Medical Campus, Mail Stop 8313, 12800 E. 19th Avenue, Aurora, CO 80045, USA.
| | - Jennifer L Wagner
- Department of Bioengineering, University of Colorado, Anschutz Medical Campus, Mail Stop 8607, 12700 E. 19th Avenue, Aurora, CO 80045, USA.
| | - Robin Shandas
- Department of Bioengineering, University of Colorado, Anschutz Medical Campus, Mail Stop 8607, 12700 E. 19th Avenue, Aurora, CO 80045, USA.
| | - Kimberly B Bjugstad
- Neuroscience Program, University of Colorado, Anschutz Medical Campus, Mail Stop 8313, 12800 E. 19th Avenue, Aurora, CO 80045, USA; Department of Pediatrics, University of Colorado, Anschutz Medical Campus, Mail Stop 8313, 12800 E. 19th Avenue, Aurora, CO 80045, USA.
| |
Collapse
|
17
|
Stetsyshyn Y, Fornal K, Raczkowska J, Zemla J, Kostruba A, Ohar H, Ohar M, Donchak V, Harhay K, Awsiuk K, Rysz J, Bernasik A, Budkowski A. Temperature and pH dual-responsive POEGMA-based coatings for protein adsorption. J Colloid Interface Sci 2013; 411:247-56. [PMID: 24050642 DOI: 10.1016/j.jcis.2013.08.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 08/02/2013] [Accepted: 08/05/2013] [Indexed: 10/26/2022]
Abstract
Poly(oligo(ethylene glycol)ethyl ether methacrylate (POEGMA246) coatings were successfully fabricated using novel approach via polymerization from oligoperoxide grafted to premodified glass substrate. Wettability, content and composition of coatings fabricated with different polymerization times were determined using contact angle measurements, ellipsometry and Time of Flight-Secondary Ion Mass Spectrometry (TOF-SIMS). Thermo- and pH-responsive properties of POEGMA246 coatings were found to depend significantly on concentration of the grafted POEGMA246. Coatings fabricated with polymerization time 30 h exhibit not only temperature- but also pH-dependence of wettability. Thermal response of wettability, measured between 20 and 32°C, was prominent at pH 9 and 7 and diminished or was absent at pH 5 and 3, indicating a transition between hydrated loose coils and hydrophobic collapsed chains, blocked at low pH. Protein adsorption, observed by fluorescence microscopy and analyzed semi-quantitatively using integral geometry approach, decreased dramatically for model protein (lentil lectin labeled with fluorescein isothiocyanate) at transition from pH 5 to pH 9, showing only very weak thermal-dependence. Strong protein adsorption response to pH and very weak one to temperature was confirmed by TOF-SIMS and Principal Component Analysis.
Collapse
Affiliation(s)
- Yurij Stetsyshyn
- "Lvivska Polytechnika" National University, S. Bandery 12, 79013 Lviv, Ukraine.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Jin N, Morin EA, Henn DM, Cao Y, Woodcock JW, Tang S, He W, Zhao B. Agarose hydrogels embedded with pH-responsive diblock copolymer micelles for triggered release of substances. Biomacromolecules 2013; 14:2713-23. [PMID: 23815070 DOI: 10.1021/bm4005639] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Hybrid agarose hydrogels embedded with pH-responsive diblock copolymers micelles were developed to achieve functional hydrogels capable of stimulus-triggered drug release. Specifically, a well-defined poly(ethylene oxide) (PEO)-based diblock copolymer, PEO-b-poly(2-(N,N-diisopropylamino)ethyl methacrylate) (PEO(113)-b-PDPAEMA(31), where the subscripts represent the degrees of polymerization of two blocks), was synthesized by atom transfer radical polymerization. PDPAEMA is a pH-responsive polymer with a pKa value of 6.3. The PEO(113)-b-PDPAEMA(31) micelles were formed by a solvent-switching method, and their pH-dependent dissociation behavior was investigated by dynamic light scattering and fluorescence spectroscopy. Both studies indicated that the micelles were completely disassembled at pH = 6.40. The biocompatibility of PEO(113)-b-PDPAEMA(31) micelles was demonstrated by in vitro primary cortical neural culture. Hybrid agarose hydrogels were made by cooling 1.0 wt % agarose solutions that contained various amounts of PEO(113)-b-PDPAEMA(31) micelles at either 2 or 4 °C. Rheological measurements showed that the mechanical properties of gels were not significantly adversely affected by the incorporation of diblock copolymer micelles with a concentration as high as 5.0 mg/g. Using Nile Red as a model hydrophobic drug, its incorporation into the core of diblock copolymer micelles was demonstrated. Characterized by fluorescent spectroscopy, the release of Nile Red from the hybrid hydrogel was shown to be controllable by pH due to the responsiveness of the block copolymer micelles. Based on the prominent use of agarose gels as scaffolds for cell transplantation for neural repair, the hybrid hydrogels embedded with stimuli-responsive block copolymer micelles could allow the controlled delivery of hydrophobic neuroprotective agents to improve survival of transplanted cells in tune with signals from the surrounding pathological environment.
Collapse
Affiliation(s)
- Naixiong Jin
- Department of Chemistry, University of Tennessee, Knoxville, 37996, USA
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Kermagoret A, Fustin CA, Bourguignon M, Detrembleur C, Jérôme C, Debuigne A. One-pot controlled synthesis of double thermoresponsive N-vinylcaprolactam-based copolymers with tunable LCSTs. Polym Chem 2013. [DOI: 10.1039/c3py00134b] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
20
|
Jin N, Zhang H, Jin S, Dadmun MD, Zhao B. Shifting Sol–Gel Phase Diagram of a Doubly Thermosensitive Hydrophilic Diblock Copolymer Poly(methoxytri(ethylene glycol) acrylate-co-acrylic acid)-b-poly(ethoxydi(ethylene glycol) acrylate-co-acrylic acid) in Aqueous Solution. Macromolecules 2012. [DOI: 10.1021/ma300791y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Naixiong Jin
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Hao Zhang
- Department of Chemistry, College of Staten Island, CUNY, Staten Island, New
York 10314, United States
| | - Shi Jin
- Department of Chemistry, College of Staten Island, CUNY, Staten Island, New
York 10314, United States
| | - Mark D. Dadmun
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| |
Collapse
|