1
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Chen Y, Song X, Wang Y, Huang Y, Wang Y, Zhu C. The effect of Pluronic P123 on shape memory of cross-linked polyurethane/poly(l-lactide) biocomposite. Int J Biol Macromol 2024; 259:128788. [PMID: 38154706 DOI: 10.1016/j.ijbiomac.2023.128788] [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: 09/01/2023] [Revised: 12/02/2023] [Accepted: 12/12/2023] [Indexed: 12/30/2023]
Abstract
Polyurethane (PU) and poly(l-lactide) (PLLA) have attracted increasing attention in the development of shape memory polymers (SMPs) due to their good biocompatibility and degradability. Although Pluronic P123 can be used to tune polymeric surface hydrophilicity, its effect on SM performance is a mystery. In this study, a soluble cross-linked PU is synthesized as the switching phase and combined with PLLA and P123 to construct a hydrothermally responsive SM composite. The water contact angle of PU/PLLA/P123 decreases from 22.7° to 5.1° within 2 min. PU and P123 form the switching group, which enhances the SM behavior of the composite. The shape fixity (Rf) and shape recovery (Rr) of PU/PLLA/P123 are 94.4 % and 98 % in 55 °C water, respectively, and the shape recovery time is only 10 s. P123 plays the role of "turbine" in the SM process. PU/PLLA/P123 exhibits a balance between stiffness and elasticity, and good degradability. Furthermore, PU/PLLA/P123 is also biocompatible and beneficial to cell proliferation and growth. Therefore, it offers an alternative approach to developing hydrothermally responsive SM biocomposites based on P123, PU and PLLA for biomedical applications.
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Affiliation(s)
- Youhua Chen
- School of Chemical Engineering, Changchun University of Technology, China
| | - Xiaofeng Song
- School of Chemical Engineering, Changchun University of Technology, China; Jiangxi Center of Modern Apparel Engineering and Technology, Jiangxi Institute of Fashion Technology, China.
| | - Ying Wang
- School of Chemical Engineering, Changchun University of Technology, China
| | - Yuan Huang
- School of Chemical Engineering, Changchun University of Technology, China
| | - Yanhe Wang
- Jiangxi Center of Modern Apparel Engineering and Technology, Jiangxi Institute of Fashion Technology, China
| | - Chuanming Zhu
- School of Chemical Engineering, Changchun University of Technology, China
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2
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Kurmaz SV, Perepelitsina EO, Vasiliev SG, Avilova IA, Khodos II, Kurmaz VA, Chernyaev DA, Soldatova YV, Filatova NV, Faingold II. Macromolecular Design and Engineering of New Amphiphilic N-Vinylpyrrolidone Terpolymers for Biomedical Applications. Int J Mol Sci 2023; 24:15170. [PMID: 37894851 PMCID: PMC10607074 DOI: 10.3390/ijms242015170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/06/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
New amphiphilic VP-(di)methacrylate terpolymers of different monomer compositions and topologies have been synthesized by radical polymerization in toluene without any growth regulator of polymer chains. Their structures and properties in solid state and water solution were studied by double-detector size-exclusion chromatography; IR-, 1H, and 13C NMR-spectroscopy; DLS, TEM, TG, and DSC methods. The composition of the VP-AlkMA-TEGDM monomer mixture has been established to regulate the topology of the resulting macromolecules. The studied terpolymers presented on TEM images as individual low-contrast particles and their conglomerates of various sizes with highly ordered regions; in general, they are amorphous structures. None of the terpolymers demonstrated cytotoxic effects for noncancerous Vero and tumor HeLa cells. Hydrophobic D-α-tocopherol (TP) was encapsulated in terpolymer nanoparticles (NPs), and its antioxidant activity was evaluated by ABTS (radical monocation 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid)) or DPPH (2,2'-diphenyl-1-picrylhydrazyl) methods. The reaction efficiency depends on the TP-NP type. The IC50 values for the decolorization reaction of ABTS•+ and DPPH inhibition in the presence of initial and encapsulated TP were obtained.
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Affiliation(s)
- Svetlana V. Kurmaz
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Russia; (E.O.P.); (S.G.V.); (I.A.A.); (V.A.K.); (D.A.C.); (Y.V.S.); (N.V.F.); (I.I.F.)
| | - Evgenia O. Perepelitsina
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Russia; (E.O.P.); (S.G.V.); (I.A.A.); (V.A.K.); (D.A.C.); (Y.V.S.); (N.V.F.); (I.I.F.)
| | - Sergey G. Vasiliev
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Russia; (E.O.P.); (S.G.V.); (I.A.A.); (V.A.K.); (D.A.C.); (Y.V.S.); (N.V.F.); (I.I.F.)
| | - Irina A. Avilova
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Russia; (E.O.P.); (S.G.V.); (I.A.A.); (V.A.K.); (D.A.C.); (Y.V.S.); (N.V.F.); (I.I.F.)
| | - Igor I. Khodos
- Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Sciences, 142432 Chernogolovka, Russia;
| | - Vladimir A. Kurmaz
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Russia; (E.O.P.); (S.G.V.); (I.A.A.); (V.A.K.); (D.A.C.); (Y.V.S.); (N.V.F.); (I.I.F.)
| | - Dmitry A. Chernyaev
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Russia; (E.O.P.); (S.G.V.); (I.A.A.); (V.A.K.); (D.A.C.); (Y.V.S.); (N.V.F.); (I.I.F.)
| | - Yuliya V. Soldatova
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Russia; (E.O.P.); (S.G.V.); (I.A.A.); (V.A.K.); (D.A.C.); (Y.V.S.); (N.V.F.); (I.I.F.)
| | - Natalia V. Filatova
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Russia; (E.O.P.); (S.G.V.); (I.A.A.); (V.A.K.); (D.A.C.); (Y.V.S.); (N.V.F.); (I.I.F.)
| | - Irina I. Faingold
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences, 142432 Chernogolovka, Russia; (E.O.P.); (S.G.V.); (I.A.A.); (V.A.K.); (D.A.C.); (Y.V.S.); (N.V.F.); (I.I.F.)
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3
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Mousavifard SM, Ghermezcheshme H, Mirzaalipour A, Mohseni M, de With G, Makki H. PolySMart: a general coarse-grained molecular dynamics polymerization scheme. MATERIALS HORIZONS 2023; 10:2281-2296. [PMID: 37022310 DOI: 10.1039/d3mh00088e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The development of simulation methods to study the structure and dynamics of a macroscopically sized piece of polymer material is important as such methods can elucidate structure-property relationships. Several methods have been reported to construct initial structures for homo- and co-polymers; however, most of them are only useful for short linear polymers since one needs to pack and equilibrate the far-from-equilibrium initial structures, which is a tedious task for long or hyperbranched polymers and unfeasible for polymer networks. In this method article, we present PolySMart, i.e., an open-source python package, which can effectively produce fully equilibrated homo- and hetero-polymer melts and solutions with no limitation on the polymer topology and size, at a coarse-grained resolution and through a bottom-up approach. This python package is also capable of exploring the polymerization kinetics through its reactive scheme in realistic conditions so that it can model the multiple co-occurring polymerization reactions (with different reaction rates) as well as consecutive polymerizations under stoichiometric and non-stoichiometric conditions. Thus, the equilibrated polymer models are generated through correct polymerization kinetics. A benchmark and verification of the performance of the program for several realistic cases, i.e., for homo-polymers, co-polymers, and crosslinked networks, is given. We further discuss the capability of the program to contribute to the discovery and design of new polymer materials.
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Affiliation(s)
- Seyyed Mohammad Mousavifard
- Department of Polymer and Color Engineering, Amirkabir University of Technology, 424 Hafez Ave., Tehran, Iran
| | - Hassan Ghermezcheshme
- Department of Polymer and Color Engineering, Amirkabir University of Technology, 424 Hafez Ave., Tehran, Iran
| | - Alireza Mirzaalipour
- Department of Polymer and Color Engineering, Amirkabir University of Technology, 424 Hafez Ave., Tehran, Iran
| | - Mohsen Mohseni
- Department of Polymer and Color Engineering, Amirkabir University of Technology, 424 Hafez Ave., Tehran, Iran
| | - Gijsbertus de With
- Laboratory of Physical Chemistry, Department of Chemical Engineering & Chemistry, Eindhoven University of Technology, POB 513, NL-5600 MB Eindhoven, The Netherlands
| | - Hesam Makki
- Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool L69 7ZD, UK.
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4
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Balafouti A, Pispas S. Hyperbranched Copolymers of Methacrylic Acid and Lauryl Methacrylate H-P(MAA-co-LMA): Synthetic Aspects and Interactions with Biorelevant Compounds. Pharmaceutics 2023; 15:pharmaceutics15041198. [PMID: 37111683 PMCID: PMC10140914 DOI: 10.3390/pharmaceutics15041198] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 04/05/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
The synthesis of novel copolymers using one-step reversible addition-fragmentation chain transfer (RAFT) copolymerization of biocompatible methacrylic acid (MAA), lauryl methacrylate (LMA), and difunctional ethylene glycol dimethacrylate (EGDMA) as a branching agent is reported. The obtained amphiphilic hyperbranched H-P(MAA-co-LMA) copolymers are molecularly characterized by size exclusion chromatography (SEC), FTIR, and 1H-NMR spectroscopy, and subsequently investigated in terms of their self-assembly behavior in aqueous media. The formation of nanoaggregates of varying size, mass, and homogeneity, depending on the copolymer composition and solution conditions such as concentration or pH variation, is demonstrated by light scattering and spectroscopic techniques. Furthermore, drug encapsulation properties are studied by incorporating the low bioavailability drug, curcumin, in the nano-aggregate hydrophobic domains, which can also act as a bioimaging agent. The interaction of polyelectrolyte MAA units with model proteins is described to examine protein complexation capacity relevant to enzyme immobilization strategies, as well as explore copolymer self-assembly in simulated physiological media. The results confirm that these copolymer nanosystems could provide competent biocarriers for imaging and drug or protein delivery/enzyme immobilization applications.
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Affiliation(s)
- Anastasia Balafouti
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., 11635 Athens, Greece
| | - Stergios Pispas
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave., 11635 Athens, Greece
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5
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Polo Fonseca L. From nano to the macro: tuning hierarchical aggregation of thermoresponsive PEG/PCL-based polyurethanes via molar mass/composition control. Macromol Res 2023. [DOI: 10.1007/s13233-023-00137-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
AbstractAmphiphilic hyperbranched polyurethanes (HPUs) based on PEG and PCL are promising for several biomedical applications. However, the lack of control over the molar mass and composition hinders a deep understanding of the aqueous self-assembly of HPUs. In this paper, the control over the HPU molar mass and composition was provided by dynamic urea bond-mediated polymerization (DUBMP), enabling a careful evaluation of their aqueous self-assembly by 1H NMR, DLS, and Cryo-TEM. HPUs containing a single PCL block per chain self-assemble into nanoaggregates (Rh ≈ 10 nm) in water up to its cloud-point temperature (Tcp) of 34 °C. On the other hand, HPUs with more than one PCL block per chain self-assemble into nanoaggregates and their clusters below Tcp. In this case, the solution behavior can be tuned by the HPU molar mass. Increasing $$\overline{{\mathrm{M} }_{\mathrm{w}}}$$
M
w
¯
from 4 to 19 kDa, HPUs of similar composition can form colloidally stable cluster suspensions ($$\overline{{\mathrm{M} }_{\mathrm{w}}}$$
M
w
¯
= 4 kDa) and phase separate into a denser liquid aggregate–cluster phase ($$\overline{{\mathrm{M} }_{\mathrm{w}}}$$
M
w
¯
= 7 kDa) or into a highly viscous aggregate-network phase ($$\overline{{\mathrm{M} }_{\mathrm{w}}}$$
M
w
¯
= 19 kDa). This type of control over the hierarchical aggregation of HPUs was reported for the first time and is interesting for biomedical applications.
Graphical abstract
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6
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Injectable PTHF-based thermogelling polyurethane implants for long-term intraocular application. Biomater Res 2022; 26:70. [PMID: 36461130 PMCID: PMC9716749 DOI: 10.1186/s40824-022-00316-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 11/06/2022] [Indexed: 12/04/2022] Open
Abstract
BACKGROUND Hydrogels show great potential to be used for intraocular applications due to their high-water content and similarity to the native vitreous. Injectable thermosensitive hydrogels through a small-bore needle can be used as a delivery system for drugs or a tamponading substitute to treat posterior eye diseases with clear clinical potential. However, none of the currently available thermosensitive hydrogels can provide intraocular support for up to 3 months or more. METHOD In this study, an injectable polytetrahydrofuran (PTHF)-based thermosensitive hydrogel was synthesized by polyurethane reaction. We examined the injectability, rheological properties, microstructure, cytotoxicity, and in vivo compatibility and stability of the hydrogels in rabbit eyes. RESULTS We found that the PTHF block type and PTHF component ratio could modulate thermogelation properties of the polyurethane polymers. The PTHF-based hydrogel implants retained normal retinal structure and function. Incorporating bioinert PTHF generated highly biocompatible and more stable thermogels in the vitreous cavity, with gel networks and the presence of polymer still observed after 3 months when other thermogels would have been completely cleared. Moreover, despite lacking hydrolytically cleavable linkages, the polymers could be most naturally removed from the native vitreous by bio-erosion without additional surgical interventions. CONCLUSION Our findings suggest the potential of incorporating hydrophobic bioinert blocks to enhance the in vivo stability of supramolecularly associated hydrogels for long-term intraocular applications.
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7
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Smart Hydrogel Formed by Alginate-g-Poly(N-isopropylacrylamide) and Chitosan through Polyelectrolyte Complexation and Its Controlled Release Properties. Gels 2022; 8:gels8070441. [PMID: 35877526 PMCID: PMC9315676 DOI: 10.3390/gels8070441] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/11/2022] [Accepted: 07/13/2022] [Indexed: 11/16/2022] Open
Abstract
Smart hydrogels that can respond to external stimuli such as temperature and pH have attracted tremendous interest for biological and biomedical applications. In this work, we synthesized two alginate-graft-poly(N-isopropylacrylamide) (Alg-g-PNIPAAm) copolymers and aimed to prepare smart hydrogels through formation of polyelectrolyte complex (PEC) between the negatively charged Alg-g-PNIPAAm copolymers and the positively charged chitosan (Cts) in aqueous solutions. The hydrogels were expected to be able to respond to both temperature and pH changes due to the nature of Alg-g-PNIPAAm and chitosan. The hydrogel formation was determined by a test tube inverting method and confirmed by the rheological measurements. The rheological measurements showed that the PEC hydrogels formed at room temperature could be further enhanced by increasing temperature over the lower critical solution temperature (LCST) of PNIPAAm, because PNIPAAm would change from hydrophilic to hydrophobic upon increasing temperature over its LCST, and the hydrophobic interaction between the PNIPAAm segments may act as additional physical crosslinking. The controlled release properties of the hydrogels were studied by using the organic dye rhodamine B (RB) as a model drug at different pH. The PEC hydrogels could sustain the RB release more efficiently at neutral pH. Both low pH and high pH weakened the PEC hydrogels, and resulted in less sustained release profiles. The release kinetics data were found to fit well to the Krosmyer–Peppas power law model. The analysis of the release kinetic parameters obtained by the modelling indicates that the release of RB from the PEC hydrogels followed mechanisms combining diffusion and dissolution of the hydrogels, but the release was mainly governed by diffusion with less dissolution at pH 7.4 when the PEC hydrogels were stronger and stabler than those at pH 5.0 and 10.0. Therefore, the PEC hydrogels are a kind of smart hydrogels holding great potential for drug delivery applications.
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8
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Fonseca LP. Dynamic Urea Bond‐mediated Polymerization for Solvent‐free Low‐Ð Linear Polyurethanes of Controlled Molar Mass: Hypothesis of diffusion Control. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lucas Polo Fonseca
- Institute of Chemistry University of Campinas (UNICAMP) Campinas SP PO Box 6154 Brazil
- POLYMAT and Department of Polymers and Advanced Materials: Physics Chemistry, and Technology, Faculty of Chemistry University of the Basque Country UPV/EHU Paseo Manuel de Lardizabal 3 Donostia 20018 Spain
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9
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Lin Q, Ow V, Boo YJ, Teo VTA, Wong JHM, Tan RPT, Xue K, Lim JYC, Loh XJ. Branched PCL-Based Thermogelling Copolymers: Controlling Polymer Architecture to Tune Drug Release Profiles. Front Bioeng Biotechnol 2022; 10:864372. [PMID: 35433644 PMCID: PMC9006874 DOI: 10.3389/fbioe.2022.864372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 03/14/2022] [Indexed: 12/25/2022] Open
Abstract
Temperature-responsive hydrogels, or thermogels, are a unique class of biomaterials that show facile and spontaneous transition from solution to gel when warmed. Their high biocompatibility, and ease of formulation with both small molecule drugs and biologics have made these materials prime candidates as injectable gel depots for sustained local drug delivery. At present, controlling the kinetics and profile of drug release from thermogels is achieved mainly by varying the ratio of hydrophobic: hydrophilic composition and the polymer molecular weight. Herein, we introduce polymer branching as a hitherto-overlooked polymer design parameter that exhibits profound influences on the rate and profile of drug release. Through a family of amphiphilic thermogelling polymers with systematic variations in degree of branching, we demonstrate that more highly-branched polymers are able to pack less efficiently with each other during thermogel formation, with implications on their physical properties and stability towards gel erosion. This in turn resulted in faster rates of release for both encapsulated small molecule hydrophobic drug and protein. Our results demonstrate the possibility of exploiting polymer branching as a hitherto-overlooked design parameter for tailoring the kinetics and profile of drug release in injectable thermogel depots.
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Affiliation(s)
- Qianyu Lin
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore (NUS), Singapore, Singapore
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Valerie Ow
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Yi Jian Boo
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Vincent T. A. Teo
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
| | - Joey H. M. Wong
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Rebekah P. T. Tan
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Kun Xue
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Jason Y. C. Lim
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore, Singapore
- *Correspondence: Jason Y. C. Lim, ; Xian Jun Loh,
| | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore
- Department of Materials Science and Engineering, National University of Singapore (NUS), Singapore, Singapore
- *Correspondence: Jason Y. C. Lim, ; Xian Jun Loh,
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Han Y, Jiang L, Shi H, Xu C, Liu M, Li Q, Zheng L, Chi H, Wang M, Liu Z, You M, Loh XJ, Wu YL, Li Z, Li C. Effectiveness of an ocular adhesive polyhedral oligomeric silsesquioxane hybrid thermo-responsive FK506 hydrogel in a murine model of dry eye. Bioact Mater 2022; 9:77-91. [PMID: 34820557 PMCID: PMC8586264 DOI: 10.1016/j.bioactmat.2021.07.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 07/21/2021] [Accepted: 07/21/2021] [Indexed: 12/14/2022] Open
Abstract
Dry eye is a common ocular disease that results in discomfort and impaired vision, impacting an individual's quality of life. A great number of drugs administered in eye drops to treat dry eye are poorly soluble in water and are rapidly eliminated from the ocular surface, which limits their therapeutic effects. Therefore, it is imperative to design a novel drug delivery system that not only improves the water solubility of the drug but also prolongs its retention time on the ocular surface. Herein, we develop a copolymer from mono-functional POSS, PEG, and PPG (MPOSS-PEG-PPG, MPEP) that exhibits temperature-sensitive sol-gel transition behavior. This thermo-responsive hydrogel improves the water solubility of FK506 and simultaneously provides a mucoadhesive, long-acting ocular delivery system. In addition, the FK506-loaded POSS hydrogel possesses good biocompatibility and significantly improves adhesion to the ocular surface. In comparison with other FK506 formulations and the PEG-PPG-FK506 (F127-FK506) hydrogel, this novel MPOSS-PEG-PPG-FK506 (MPEP-FK506) hydrogel is a more effective treatment of dry eye in the murine dry eye model. Therefore, delivery of FK506 in this POSS hydrogel has the potential to prolong drug retention time on the ocular surface, which will improve its therapeutic efficacy in the management of dry eye.
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Affiliation(s)
- Yi Han
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science & Ocular Surface and Corneal Diseases, Eye Institute & Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen, 361102, China
| | - Lu Jiang
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore, 138634, Singapore
| | - Huihui Shi
- School of Chemical Sciences, University of Chinese Academy of Science, Beijing, 100049, China
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Science, Ningbo, 315201, China
| | - Chenfang Xu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
| | - Minting Liu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
| | - Qingjian Li
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science & Ocular Surface and Corneal Diseases, Eye Institute & Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen, 361102, China
| | - Lan Zheng
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science & Ocular Surface and Corneal Diseases, Eye Institute & Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen, 361102, China
| | - Hong Chi
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, China
| | - Mingyue Wang
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, China
| | - Zuguo Liu
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science & Ocular Surface and Corneal Diseases, Eye Institute & Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen, 361102, China
| | - Mingliang You
- Hangzhou Cancer Institute, Key Laboratory of Clinical Cancer Pharmacology and Toxicology Research of Zhejiang Province, Affiliated Hangzhou Cancer Hospital, Zhejiang University School of Medicine, Hangzhou, 310002, China
| | - Xian Jun Loh
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Science, Ningbo, 315201, China
| | - Yun-Long Wu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
| | - Zibiao Li
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), Singapore, 138634, Singapore
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575, Singapore
| | - Cheng Li
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science & Ocular Surface and Corneal Diseases, Eye Institute & Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen, 361102, China
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11
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Shibata M, Terashima T, Koga T. Micellar Aggregation and Thermogelation of Amphiphilic Random Copolymers in Water Hierarchically Dependent on Chain Length. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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12
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Ow V, Loh XJ. Recent developments of temperature‐responsive polymers for ophthalmic applications. JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1002/pol.20210907] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Valerie Ow
- Institute of Materials Research and Engineering A*STAR (Agency for Science, Technology and Research) Singapore Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering A*STAR (Agency for Science, Technology and Research) Singapore Singapore
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13
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Lin Q, Liu Z, Wong DSL, Lim CC, Liu CK, Guo L, Zhao X, Boo YJ, Wong JHM, Tan RPT, Xue K, Lim JYC, Su X, Loh XJ. High molecular weight hyper-branched PCL-based thermogelling vitreous endotamponades. Biomaterials 2021; 280:121262. [PMID: 34810039 DOI: 10.1016/j.biomaterials.2021.121262] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 10/18/2021] [Accepted: 11/14/2021] [Indexed: 01/29/2023]
Abstract
Vitreous endotamponades play essential roles in facilitating retina recovery following vitreoretinal surgery, yet existing clinically standards are suboptimal as they can cause elevated intra-ocular pressure, temporary loss of vision, and cataracts while also requiring prolonged face-down positioning and removal surgery. These drawbacks have spurred the development of next-generation vitreous endotamponades, of which supramolecular hydrogels capable of in-situ gelation have emerged as top contenders. Herein, we demonstrate thermogels formed from hyper-branched amphiphilic copolymers as effective transparent and biodegradable vitreous endotamponades for the first time. These hyper-branched copolymers are synthesised via polyaddition of polyethylene glycol, polypropylene glycol, poly(ε-caprolactone)-diol, and glycerol (branch inducing moiety) with hexamethylene diisocyanate. The hyper-branched thermogels are injected as sols and undergo spontaneous gelation when warmed to physiological temperatures in rabbit eyes. We found that polymers with an optimal degree of hyper-branching showed excellent biocompatibility and was able to maintain retinal function with minimal atrophy and inflammation, even at absolute molecular weights high enough to cause undesirable in-vivo effects for their linear counterparts. The hyper-branched thermogel is cleared naturally from the vitreous through surface hydrogel erosion and negates surgical removal. Our findings expand the scope of polymer architectures suitable for in-vivo intraocular therapeutic applications beyond linear constructs.
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Affiliation(s)
- Qianyu Lin
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore (NUS), 21 Lower Kent Ridge Rd, 119077, Singapore
| | - Zengping Liu
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, 138673, Singapore; Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, NUHS Tower Block, Level, 7119228, Singapore; Singapore Eye Research Institute (SERI), The Academia, 20 College Road, Level 6 Discovery Tower, 169856, Singapore
| | - Daniel S L Wong
- Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, NUHS Tower Block, Level, 7119228, Singapore
| | - Chen Chuan Lim
- Institute of Chemical and Engineering Sciences (ICES), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, 627833, Singapore
| | - Connie K Liu
- Institute of Chemical and Engineering Sciences (ICES), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, 627833, Singapore
| | - Liangfeng Guo
- Institute of Chemical and Engineering Sciences (ICES), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, 627833, Singapore
| | - Xinxin Zhao
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, 138673, Singapore
| | - Yi Jian Boo
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634, Singapore
| | - Joey H M Wong
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634, Singapore
| | - Rebekah P T Tan
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634, Singapore
| | - Kun Xue
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634, Singapore
| | - Jason Y C Lim
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634, Singapore; Department of Materials Science and Engineering, National University of Singapore (NUS), 9 Engineering Drive 1, 117576, Singapore.
| | - Xinyi Su
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, 138673, Singapore; Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, NUHS Tower Block, Level, 7119228, Singapore; Singapore Eye Research Institute (SERI), The Academia, 20 College Road, Level 6 Discovery Tower, 169856, Singapore; Department of Ophthalmology, National University of Hospital (NUH), 5 Lower Kent Ridge Road, NUH Medical Centre, Level 17, 119074, Singapore.
| | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, 138634, Singapore; Department of Materials Science and Engineering, National University of Singapore (NUS), 9 Engineering Drive 1, 117576, Singapore; School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, #01-30 General Office, Block N4.1, 639798, Singapore.
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14
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Zhang K, Xue K, Loh XJ. Thermo-Responsive Hydrogels: From Recent Progress to Biomedical Applications. Gels 2021; 7:77. [PMID: 34202514 PMCID: PMC8293033 DOI: 10.3390/gels7030077] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/21/2021] [Accepted: 06/22/2021] [Indexed: 12/29/2022] Open
Abstract
Thermogels are also known as thermo-sensitive or thermo-responsive hydrogels and can undergo a sol-gel transition as the temperature increases. This thermogelling behavior is the result of combined action from multiscale thermo-responsive mechanisms. From micro to macro, these mechanisms can be attributed to LCST behavior, micellization, and micelle aggregation of thermogelling polymers. Due to its facile phase conversion properties, thermogels are injectable yet can form an in situ gel in the human body. Thermogels act as a useful platform biomaterial that operates at physiological body temperatures. The purpose of this review is to summarize the recent progress in thermogel research, including investigations on the thermogel gelation mechanism and its applications in drug delivery, 3D cell culture, and tissue engineering. The review also discusses emerging directions in the study of thermogels.
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Affiliation(s)
- Kaiwen Zhang
- Department of Biomedical Engineering, College of Engineering, Southern University of Science and Technology (SUSTech), 1088 Xueyuan Avenue, Shenzhen 518055, China;
| | - Kun Xue
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634, Singapore
- Department of Materials Science and Engineering, National University of Singapore (NUS), 9 Engineering Drive 1, Singapore 117576, Singapore
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15
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Ben-Miled A, Nabiyan A, Wondraczek K, Schacher FH, Wondraczek L. Controlling Growth of Poly (Triethylene Glycol Acrylate- Co-Spiropyran Acrylate) Copolymer Liquid Films on a Hydrophilic Surface by Light and Temperature. Polymers (Basel) 2021; 13:polym13101633. [PMID: 34069828 PMCID: PMC8157298 DOI: 10.3390/polym13101633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/11/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022] Open
Abstract
A quartz crystal microbalance with dissipation monitoring (QCM-D) was employed for in situ investigations of the effect of temperature and light on the conformational changes of a poly (triethylene glycol acrylate-co-spiropyran acrylate) (P (TEGA-co-SPA)) copolymer containing 12-14% of spiropyran at the silica-water interface. By monitoring shifts in resonance frequency and in acoustic dissipation as a function of temperature and illumination conditions, we investigated the evolution of viscoelastic properties of the P (TEGA-co-SPA)-rich wetting layer growing on the sensor, from which we deduced the characteristic coil-to-globule transition temperature, corresponding to the lower critical solution temperature (LCST) of the PTEGA part. We show that the coil-to-globule transition of the adsorbed copolymer being exposed to visible or UV light shifts to lower LCST as compared to the bulk solution: the transition temperature determined acoustically on the surface is 4 to 8 K lower than the cloud point temperature reported by UV/VIS spectroscopy in aqueous solution. We attribute our findings to non-equilibrium effects caused by confinement of the copolymer chains on the surface. Thermal stimuli and light can be used to manipulate the film formation process and the film's conformational state, which affects its subsequent response behavior.
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Affiliation(s)
- Aziz Ben-Miled
- Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University Jena, D-07743 Jena, Germany;
| | - Afshin Nabiyan
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, D-07743 Jena, Germany; (A.N.); (F.H.S.)
| | - Katrin Wondraczek
- Leibniz Institute of Photonic Technology (Leibniz IPHT), D-07745 Jena, Germany;
| | - Felix H. Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, D-07743 Jena, Germany; (A.N.); (F.H.S.)
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, D-07743 Jena, Germany
| | - Lothar Wondraczek
- Otto Schott Institute of Materials Research (OSIM), Friedrich Schiller University Jena, D-07743 Jena, Germany;
- Correspondence: ; Tel.: +49-3641-9-48500
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16
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Nutan B, Kumar A, Jewrajka SK. Library of Derivatizable Multiblock Copolymers by Nucleophilic Substitution Polymerization and Targeting Specific Properties. Biomacromolecules 2020; 21:5029-5043. [PMID: 33211470 DOI: 10.1021/acs.biomac.0c01195] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Multiblock copolymers (MBCs) are fascinating in the field of biology-polymer chemistry interfaces. Synthesizing libraries of MBCs with tailor-made functionality is challenging as it involves multiple steps. Herein, a simple synthesis, analogous to polyurethane/Michael addition reactions, has been introduced to obtain a library of derivatizable MBCs. Nucleophilic substitution polymerization (SNP) of poly(ε-caprolactone) and poly(ethylene glycol) blocks containing activated halide termini by primary mono/di/coamines or clickable amines provides functional MBCs. The structure of amines directs the properties of the MBCs. The self-assembly of small molecular weight primary diamine-based MBCs shows controlled release of hydrophobic model guest molecules and therapeutics. The primary diamine (no dangling chain) helps to form MBC micelles having a relatively tight core with a low diffusion property. Antimicrobial property in the MBCs has been introduced by separating the cationic centers from the lipophilic groups using a coamine as a nucleophilic agent and a small molecular weight dihalide as a chain extender. Clickable MBCs were synthesized by changing the structure of the nucleophile to obtain degradable amphiphilic conetworks and hydrogels. Varieties of macromolecular entities could be obtained by switching the nucleophilic agent and introducing a small molecular weight chain extender. This synthesis approach provides an opportunity to tune the chemical functionality, topological structure, and biological properties of macromolecular entities.
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Affiliation(s)
- Bhingaradiya Nutan
- Membrane Science and Separation Technology Division, Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), G. B. Marg, Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Avinash Kumar
- Membrane Science and Separation Technology Division, Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), G. B. Marg, Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Suresh K Jewrajka
- Membrane Science and Separation Technology Division, Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), G. B. Marg, Bhavnagar, Gujarat 364002, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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17
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Yadav I, Purohit SD, Singh H, Bhushan S, Yadav MK, Velpandian T, Chawla R, Hazra S, Mishra NC. Vitreous substitutes: An overview of the properties, importance, and development. J Biomed Mater Res B Appl Biomater 2020; 109:1156-1176. [PMID: 33319466 DOI: 10.1002/jbm.b.34778] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 10/27/2020] [Accepted: 11/28/2020] [Indexed: 11/12/2022]
Abstract
Vitreous or vitreous humor is a complex transparent gel that fills the space between the lens and retina of an eye and acts as a transparent medium that allows light to pass through it to reach the photoreceptor layer (retina) of the eye. The vitreous humor is removed in ocular surgery (vitrectomy) for pathologies like retinal detachment, macular hole, diabetes-related vitreous hemorrhage detachment, and ocular trauma. Since the vitreous is not actively regenerated or replenished, there is a need for a vitreous substitute to fill the vitreous cavity to provide a temporary or permanent tamponade to the retina following some vitreoretinal surgeries. An ideal vitreous substitute could probably be left inside the eye forever. The vitreous humor is transparent, biocompatible, viscoelastic and highly hydrophilic; polymeric hydrogels with these properties can be a potential candidate to be used as vitreous substitutes. To meet the tremendous demand for the vitreous substitute, many scientists all over the world have developed various kinds of vitreous substitutes or tamponade agent. Vitreous substitutes, whatsoever developed till date, are associated with several advantages and disadvantages, and there is no ideal vitreous substitute available till date. This review highlights the polymer-based vitreous substitutes developed so far, along with their advantages and limitations. The gas-based and oil-based substitutes have also been discussed but very briefly.
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Affiliation(s)
- Indu Yadav
- Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Shiv Dutt Purohit
- Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Hemant Singh
- Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Sakchi Bhushan
- Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Roorkee, India
| | - Manoj Kumar Yadav
- School of Computing and Electrical Engineering, Indian Institute of Technology Mandi, Mandi, India
| | - Thirumurthy Velpandian
- Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Rohan Chawla
- Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Saugata Hazra
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, India
| | - Narayan Chandra Mishra
- Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Roorkee, India
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18
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Liang Y, Sun Y, Fu X, Lin Y, Meng Z, Meng Y, Niu J, Lai Y, Sun Y. The effect of π-Conjugation on the self-assembly of micelles and controlled cargo release. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2020; 48:525-532. [PMID: 32037890 DOI: 10.1080/21691401.2020.1725028] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Here we presented a novel micelle self-assembled from amphiphiles with π-conjugated moieties (OEG-DPH). The π-conjugated structural integrity of the micelles enabled stable encapsulation of Nile Red (NR, model drug). The self-assembly behaviour of the amphiphiles and the release profile of NR loaded micelles were investigated. Spherical core-shell structured NR loaded micelles with low CMC of 57 μg/mL and the efficient intracellular delivery process was monitored. This research provided a way to fabricate stable polymeric micelles and develop a practical nanocarrier for therapeutics delivery.
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Affiliation(s)
- Yan Liang
- Department of Pharmaceutics, School of Pharmacy, Qingdao University, Qingdao, China
| | - Yalin Sun
- Department of Pharmaceutics, School of Pharmacy, Qingdao University, Qingdao, China
| | - Xiaoheng Fu
- Department of Clinical laboratory, No.971 Hospital of the People's Liberation Army Navy, Qingdao, China
| | - Yang Lin
- Department of Pharmaceutics, School of Pharmacy, Qingdao University, Qingdao, China
| | - Zhu Meng
- Department of Pharmaceutics, School of Pharmacy, Qingdao University, Qingdao, China
| | - Yanan Meng
- Department of Pharmaceutics, School of Pharmacy, Qingdao University, Qingdao, China
| | - Jiping Niu
- Department of Nursing, Henan Vocational College of Nursing, Anyang, China
| | - Yusi Lai
- Department of Marketing, Sichuan Kelun Pharmaceutical Co, Ltd, Chengdu, China
| | - Yong Sun
- Department of Pharmaceutics, School of Pharmacy, Qingdao University, Qingdao, China
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19
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Bao J, Guo G, Lu W, Zhang X, Mao H, Dong X, Chen S, Lu W, Chen W. Thermally induced physical gelation and phase transition of stereocomplexable poly(lactic acid)/poly(ethylene glycol) copolymers: Effects of hydrophilic homopolymers. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Ma T, Sheng S, Dong X, Zhang Y, Li X, Zhu D, Lv F. A photo-triggered hydrogel for bidirectional regulation with imaging visualization. SOFT MATTER 2020; 16:7598-7605. [PMID: 32720671 DOI: 10.1039/d0sm01156h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The bidirectional intelligent regulation of hydrogels is a critical challenge in on-demand functional hydrogels. In this paper, a photo-triggered hydrogel for bidirectional regulation based on IR820-α-cyclodextrin/polyethylene glycol methyl acrylate was developed. This thermosensitive hydrogel can soften from gel to sol under near-infrared irradiation based on the photothermal effect of IR820, while the hydrogel can stiffen based on the photo-crosslinking of polyethylene glycol methyl acrylate under UV laser irradiation. After implanting in vivo, the softness and stiffness of the hydrogel can be regulated in a bidirectional manner by the switching of the irradiation wavelength. Moreover, the location and status of the hydrogel was tracked in vivo by fluorescence imaging due to the fluorescence labeling of IR820. The controlled and visible hydrogel could be potentially applied to different biomedical fields for precise treatment.
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Affiliation(s)
- Teng Ma
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, P. R. China.
| | - Shupei Sheng
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, P. R. China.
| | - Xia Dong
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, P. R. China.
| | - Yan Zhang
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, P. R. China.
| | - Xuemin Li
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, P. R. China.
| | - Dunwan Zhu
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, P. R. China.
| | - Feng Lv
- Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, P. R. China.
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21
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Lin Q, Lim JYC, Xue K, Chee CPT, Loh XJ. Supramolecular thermogels from branched PCL-containing polyurethanes. RSC Adv 2020; 10:39109-39120. [PMID: 35518420 PMCID: PMC9057440 DOI: 10.1039/d0ra07426h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 10/18/2020] [Indexed: 11/21/2022] Open
Abstract
Thermogels are temperature-responsive hydrogels which are most commonly formed by supramolecular self-assembly of polymer amphiphiles comprising of both hydrophobic and hydrophilic segments. Although polyurethane thermogels have shown great promise as biomaterials, their synthesis by step-growth polymerisation of diols and diisocyanates can also result in formation of allophanate branches, which arise from the reaction between free isocyanate groups and urethane linkages along the polymer backbone. In this paper, we investigate the effects of different synthetic conditions on the degree of allophanate branching on polyurethane amphiphiles, and explore the influences of these branches on the polymers' critical micelle concentration (CMC), thermodynamics of micellization and subsequent thermogel properties. Our findings offer new insights into the relationship between polymer structure, micelle and gel properties. These results highlight the importance of taking polymer branching into account for understanding the hierarchical self-assembly of polymer amphiphiles and the resulting thermogel properties and behaviour. Polymer branching exerts notable influence on the spontaneous temperature-triggered self-assembly of amphiphilic polymers into micelles and thermogels in water.![]()
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Affiliation(s)
- Qianyu Lin
- NUS Graduate School for Integrative Sciences and Engineering
- National University of Singapore
- Singapore 119077
| | - Jason Y. C. Lim
- Soft Materials Department Institute of Materials Research and Engineering
- Agency for Science, Technology and Research (A*STAR)
- Innovis
- Singapore 138634
| | - Kun Xue
- Soft Materials Department Institute of Materials Research and Engineering
- Agency for Science, Technology and Research (A*STAR)
- Innovis
- Singapore 138634
| | - Celestine P. T. Chee
- Soft Materials Department Institute of Materials Research and Engineering
- Agency for Science, Technology and Research (A*STAR)
- Innovis
- Singapore 138634
| | - Xian Jun Loh
- Soft Materials Department Institute of Materials Research and Engineering
- Agency for Science, Technology and Research (A*STAR)
- Innovis
- Singapore 138634
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22
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Polo Fonseca L, Zanata DDM, Gauche C, Felisberti MI. A one-pot, solvent-free, and controlled synthetic route for thermoresponsive hyperbranched polyurethanes. Polym Chem 2020. [DOI: 10.1039/d0py01026j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Hyperbranched polyurethanes (HPUs) are known for their multifunctionality and versatile properties.
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Affiliation(s)
| | | | - Cony Gauche
- Institute of Chemistry
- University of Campinas
- Campinas
- Brazil
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23
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Abstract
We explore the design and synthesis of hydrogel scaffolds for tissue engineering from the perspective of the underlying polymer chemistry. The key polymers, properties and architectures used, and their effect on tissue growth are discussed.
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24
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Shi H, Chi H, Luo Z, Jiang L, Loh XJ, He C, Li Z. Self-Healable, Fast Responsive Poly(ω-Pentadecalactone) Thermogelling System for Effective Liver Cancer Therapy. Front Chem 2019; 7:683. [PMID: 31681733 PMCID: PMC6813430 DOI: 10.3389/fchem.2019.00683] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Accepted: 10/01/2019] [Indexed: 12/30/2022] Open
Abstract
A polyurethane based thermogelling system comprising poly(ω-pentadecalactone) (PPDL), poly(ethylene glycol) (PEG), and poly(propylene glycol) (PPG), termed as PDEP, was synthesized. The incorporation of PPDL lowers critical micelle concentration (CMC) as well as critical gelation concentration (CGC) of the novel copolymers compared to commercial Pluronic® F127. The thermogels showed excellent thermal stability at high temperature up to 80°C, fast response to temperature change in a time frame of less than second, as well as remarkable self-healing properties after being broken at high strain. In vitro drug release studies using docetaxel (DTX) and cell uptake studies using doxorubicin (DOX) show high potential of the hydrogel as drug reservoir for sustainable release profile of payloads, while the in vivo anti-tumor evaluation using mice model of hepatocellular carcinoma further demonstrated the significant inhibition on the growth of tumor. Together with its excellent biocompatibility in different organs, the novel PDPE thermogelling copolymers reported in this work could potentially be utilized as in situ-forming hydrogels for liver cancer therapy.
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Affiliation(s)
- Huihui Shi
- Department of Materials Science and Engineering, National University of Singapore, Singapore, Singapore
| | - Hong Chi
- Shandong Provincial Key Laboratory of Molecular Engineering, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Zheng Luo
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, China
| | - Lu Jiang
- Institute of Materials Research and Engineering, ASTAR (Agency for Science, Technology and Research), Singapore, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, ASTAR (Agency for Science, Technology and Research), Singapore, Singapore
| | - Chaobin He
- Department of Materials Science and Engineering, National University of Singapore, Singapore, Singapore
| | - Zibiao Li
- Institute of Materials Research and Engineering, ASTAR (Agency for Science, Technology and Research), Singapore, Singapore
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25
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Polo Fonseca L, Felisberti MI. Dynamic urea bond mediated polymerization as a synthetic route for telechelic low molar mass dispersity polyurethanes and its block copolymers. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.05.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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26
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Liu Z, Liow SS, Lai SL, Alli-Shaik A, Holder GE, Parikh BH, Krishnakumar S, Li Z, Tan MJ, Gunaratne J, Barathi VA, Hunziker W, Lakshminarayanan R, Tan CWT, Chee CK, Zhao P, Lingam G, Loh XJ, Su X. Retinal-detachment repair and vitreous-like-body reformation via a thermogelling polymer endotamponade. Nat Biomed Eng 2019; 3:598-610. [DOI: 10.1038/s41551-019-0382-7] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 03/05/2019] [Indexed: 12/31/2022]
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27
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Luo Z, Xu Y, Ye E, Li Z, Wu YL. Recent Progress in Macromolecule-Anchored Hybrid Gold Nanomaterials for Biomedical Applications. Macromol Rapid Commun 2019; 40:e1800029. [PMID: 29869424 DOI: 10.1002/marc.201800029] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 04/12/2018] [Indexed: 12/16/2022]
Abstract
Gold nanoparticles (AuNPs), with elegant thermal, optical, or chemical properties due to quantum size effects, may serve as unique species for therapeutic or diagnostic applications. It is worth mentioning that their small size also results in high surface activity, leading to significantly impaired stability, which greatly hinders their biomedical utilizations. To overcome this problem, various types of macromolecular materials are utilized to anchor AuNPs so as to achieve advanced synergistic effect by dispersing, protecting, and stabilizing the AuNPs in polymeric-Au hybrid self-assemblies. In this review, the most recent development of polymer-AuNP hybrid systems, including AuNPs@polymeric nanoparticles, AuNPs@polymeric micelle, AuNPs@polymeric film, and AuNPs@polymeric hydrogel are discussed with respect to their different synthetic strategies. These sophisticated materials with diverse functions, oriented toward biomedical applications, are further summarized into several active domains in the areas of drug delivery, gene delivery, photothermal therapy, antibacterials, bioimaging, etc. Finally, the possible approaches for future design of multifunctional polymer-AuNP hybrids by combining hybrid chemistry with biological interface science are proposed.
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Affiliation(s)
- Zheng Luo
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
| | - Yang Xu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
| | - Enyi Ye
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore, 138634, Singapore
| | - Zibiao Li
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore, 138634, Singapore
| | - Yun-Long Wu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, 361102, China
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28
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Grimm O, Maßmann SC, Schacher FH. Synthesis and solution behaviour of dual light- and temperature-responsive poly(triethylene glycol-co-spiropyran) copolymers and block copolymers. Polym Chem 2019. [DOI: 10.1039/c9py00458k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We herein report on the synthesis and characterization of materials featuring a dual-responsive copolymer segment consisting of photo-responsive spiropyran (SPA) and temperature-responsive triethylene glycol acrylate (TEGA).
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Affiliation(s)
- Oliver Grimm
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC)
- Friedrich-Schiller-University Jena
- D-07743 Jena
- Germany
| | - Sarina C. Maßmann
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC)
- Friedrich-Schiller-University Jena
- D-07743 Jena
- Germany
| | - Felix H. Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC)
- Friedrich-Schiller-University Jena
- D-07743 Jena
- Germany
- Jena Centre for Soft Matter (JCSM)
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29
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Luo Z, Jiang L, Ding C, Hu B, Loh XJ, Li Z, Wu Y. Surfactant Free Delivery of Docetaxel by Poly[(R)-3-hydroxybutyrate-(R)-3-hydroxyhexanoate]-Based Polymeric Micelles for Effective Melanoma Treatments. Adv Healthc Mater 2018; 7:e1801221. [PMID: 30398017 DOI: 10.1002/adhm.201801221] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 10/23/2018] [Indexed: 12/13/2022]
Abstract
Docetaxel (DTX) is a new semisynthetic chemical in the taxoid family and serves a wide spectrum of chemotherapeutics. Current commercial formulation of DTX is based on the addition of the nonionic surfactants (i.e., ethanol and Tween 80), which are reported to cause severe hemolysis, hypersensitivity reactions, or neurotoxic toxicity and greatly hinders patient tolerance or compliance. In this report, a novel low-toxic, biodegradable, and amphiphilic poly[(R)-3-hydroxybutyrate-(R)-3-hydroxyhexanoate] (PHBHx)-based polyurethane (a copolymer made of hydrophobic PHBHx with biocompatible D-3-hydroxybutyric acid as degradation product, thermosensitive polypropylene glycol (PPG), and hydrophilic polyethylene glycol (PEG) segments) with nanosized micelle formation ability to encapsulate DTX, as a surfactant free formulation, is reported. Interestingly, this DTX-loaded poly(PHBHx/PEG/PPG urethane) micelle formulation with >90% drug loading efficiency shows significantly improved DTX solubility in aqueous medium, reduced hemolysis for better blood compatibility, and increased drug uptake in A375 melanoma cells, which provides the possibility of systematic delivery of DTX. As a proof-of-concept, an A375 melanoma xenograft mouse model is established to verify the therapeutic effect of this DTX-loaded poly(PHBHx/PEG/PPG urethane) micelle formulation, indicating the promising application of PHBHx-based polymeric nanosized micelle as a surfactant free formulation of chemotherapeutics which might greatly be beneficial for controllable delivery of pharmaceutics and cancer therapy.
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Affiliation(s)
- Zheng Luo
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress BiologySchool of Pharmaceutical SciencesXiamen University Xiamen 361102 P. R. China
| | - Lu Jiang
- Institute of Materials Research and EngineeringA*STAR (Agency for Science, Technology and Research) 2 Fusionopolis Way, Innovis, #08‐03 Singapore 138634 Singapore
| | - Chizhu Ding
- College of ScienceHuazhong Agricultural University Wuhan 430074 P. R. China
| | - Benhui Hu
- School of Biomedical Engineering and InformaticsNanjing Medical University Nanjing 211166 P. R. China
| | - Xian Jun Loh
- Institute of Materials Research and EngineeringA*STAR (Agency for Science, Technology and Research) 2 Fusionopolis Way, Innovis, #08‐03 Singapore 138634 Singapore
| | - Zibiao Li
- Institute of Materials Research and EngineeringA*STAR (Agency for Science, Technology and Research) 2 Fusionopolis Way, Innovis, #08‐03 Singapore 138634 Singapore
| | - Yun‐Long Wu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress BiologySchool of Pharmaceutical SciencesXiamen University Xiamen 361102 P. R. China
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30
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Chakraborty S, Pagaduan JNM, Melgar ZKA, Seitz S, Kan K, Ajiro H. Glycerol-modified poly(ε-caprolactone): an biocatalytic approach to improve the hydrophilicity of poly(ε-caprolactone). Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2443-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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31
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Zhu JL, Yu SWK, Chow PKH, Tong YW, Li J. Controlling injectability and in vivo stability of thermogelling copolymers for delivery of yttrium-90 through intra-tumoral injection for potential brachytherapy. Biomaterials 2018; 180:163-172. [PMID: 30053657 DOI: 10.1016/j.biomaterials.2018.07.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 06/14/2018] [Accepted: 07/11/2018] [Indexed: 02/07/2023]
Abstract
Intra-tumoral injection of radiopharmaceuticals such as yttrium-90 (90Y) or phosphorus-32 (32P) is an important route for brachytherapy in unresectable solid tumors such as locally advanced hepatocellular carcinoma. However, the injected radiopharmaceuticals can potentially leak out from the tumor site due to high intra-tumoral pressure. In this study, we demonstrated the use of thermogelling copolymers that can be injected into tumor and subsequently solidify as hydrogels within the tumor that can potentially overcome the above problem. To this end, a series of thermogelling polyurethane copolymers with varying compositions were designed and synthesized from Pluronic F127, poly(3-hydroxylbutyrate), and poly(propylene glycol), which were characterized in terms of their molecular structures, compositions, phase diagrams, rheological properties, and injectability and body temperature stability in vitro and in vivo. The analyses of our data elucidated the injectability of the copolymer solutions at low temperatures, and the stability of the hydrogels at the body temperature. This provided the basis on which we could identify one copolymer with balanced composition as the most suitable candidate for intra-tumoral injection and for prevention of the leakage. Finally, the injectability and in vivo stability of the copolymer solution and hydrogel loaded with 90Y were further demonstrated in a mouse tumor model, and the in vivo biodistribution of 90Y showed that the radionuclide could be retained at the tumor site, indicating that the 90Y-loaded copolymer has a great potential for tumor radio-brachytherapy.
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Affiliation(s)
- Jing-Ling Zhu
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore
| | | | - Pierce Kah-Hoe Chow
- Division of Surgical Oncology, National Cancer Centre, 11 Hospital Drive, Singapore, 169610, Singapore; Duke-NUS Medical School Singapore, 11 Hospital Drive, Singapore, 169857, Singapore.
| | - Yen Wah Tong
- Department of Chemical and Biomolecular Engineering, Faculty of Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117576, Singapore
| | - Jun Li
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore, 117574, Singapore.
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32
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Ye H, Zhang K, Kai D, Li Z, Loh XJ. Polyester elastomers for soft tissue engineering. Chem Soc Rev 2018; 47:4545-4580. [PMID: 29722412 DOI: 10.1039/c8cs00161h] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Polyester elastomers are soft, biodegradable and biocompatible and are commonly used in various biomedical applications, especially in tissue engineering. These synthetic polyesters can be easily fabricated using various techniques such as solvent casting, particle leaching, molding, electrospinning, 3-dimensional printing, photolithography, microablation etc. A large proportion of tissue engineering research efforts have focused on the use of allografts, decellularized animal scaffolds or other biological materials as scaffolds, but they face the major concern of triggering immunological responses from the host, on top of other issues. This review paper will introduce the recent developments in elastomeric polyesters, their synthesis and fabrication techniques, as well as their application in the biomedical field, focusing primarily on tissue engineering in ophthalmology, cardiac and vascular systems. Some of the commercial and near-commercial polyesters used in these tissue engineering fields will also be described.
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Affiliation(s)
- Hongye Ye
- Institute of Materials Research and Engineering (IMRE), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634, Singapore.
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33
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Fan X, Yang J, Loh XJ, Li Z. Polymeric Janus Nanoparticles: Recent Advances in Synthetic Strategies, Materials Properties, and Applications. Macromol Rapid Commun 2018; 40:e1800203. [PMID: 29900609 DOI: 10.1002/marc.201800203] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 04/17/2018] [Indexed: 12/13/2022]
Abstract
Polymeric Janus nanoparticles with two sides of incompatible chemistry have received increasing attention due to their tunable asymmetric structure and unique material characteristics. Recently, with the rapid progress in controlled polymerization combined with novel fabrication techniques, a large array of functional polymeric Janus particles are diversified with sophisticated architecture and applications. In this review, the most recently developed strategies for controlled synthesis of polymeric Janus nanoparticles with well-defined size and complex superstructures are summarized. In addition, the pros and cons of each approach in mediating the anisotropic shapes of polymeric Janus particles as well as their asymmetric spatial distribution of chemical compositions and functionalities are discussed and compared. Finally, these newly developed structural nanoparticles with specific shapes and surface functions orientated applications in different domains are also discussed, followed by the perspectives and challenges faced in the further advancement of polymeric Janus nanoparticles as high performance materials.
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Affiliation(s)
- Xiaoshan Fan
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
| | - Jing Yang
- Institute of Materials Research and Engineering, A*STAR (Agency for Science Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore, 138634, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, A*STAR (Agency for Science Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore, 138634, Singapore
| | - Zibiao Li
- Institute of Materials Research and Engineering, A*STAR (Agency for Science Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore, 138634, Singapore
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34
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Grimm O, Schacher FH. Dual Stimuli-Responsive P(NIPAAm-co-SPA) Copolymers: Synthesis and Response in Solution and in Films. Polymers (Basel) 2018; 10:E645. [PMID: 30966679 PMCID: PMC6403943 DOI: 10.3390/polym10060645] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/28/2018] [Accepted: 06/04/2018] [Indexed: 12/23/2022] Open
Abstract
We present the synthesis and solution properties of dual stimuli-responsive poly(N-isopropylacrylamide-co-spiropyran acrylate) (P(NIPAAm-co-SPA)) copolymers of varying composition prepared via nitroxide-mediated copolymerization. The resulting copolymers feature molar masses from 40,000 to 100,000 g/mol according to static light scattering and an SPA content of up to 5.3%. The latter was determined by ¹H NMR spectroscopy and UV⁻Vis spectroscopy. These materials exhibit reversible response upon irradiation in polymeric films for a minimum of three cycles; their response in solution to both light and temperature was also investigated in an aqueous TRIS buffer (pH 8). Irradiation was carried out using LED setups with wavelengths of 365 and 590 nm. In aqueous solution, a custom-made setup using a fiber-coupled 200 W Hg(Xe) lamp with 340 and 540 nm filters was used and additional heating of the copolymer solutions during irradiation allowed to study influence of the presence of either the spiropyran or merocyanine form on the cloud point temperature. Hereby, it was found that increasing the SPA content leads to a more pronounced difference between both states and decreasing cloud points in general.
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Affiliation(s)
- Oliver Grimm
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller-University Jena, Humboldtstraße 10, D-07743 Jena, Germany.
| | - Felix H Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC), Friedrich-Schiller-University Jena, Humboldtstraße 10, D-07743 Jena, Germany.
- Jena Center for Soft Matter (JCSM), Friedrich-Schiller-University Jena, Philosophenweg 7, D-07743 Jena, Germany.
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35
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Cheng H, Fan X, Wang X, Ye E, Loh XJ, Li Z, Wu YL. Hierarchically Self-Assembled Supramolecular Host-Guest Delivery System for Drug Resistant Cancer Therapy. Biomacromolecules 2018; 19:1926-1938. [PMID: 29350902 DOI: 10.1021/acs.biomac.7b01693] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
In this report, a new star-like copolymer β-CD- g-(PNIPAAm- b-POEGA) x, consisting of a β-CD core, grafted with temperature-responsive poly( N-isopropylacrylamide) (PNIPAAm) and biocompatible poly(oligo(ethylene glycol) acrylate) (POEGA) in a block copolymer of the arms, was used to deliver chemotherapeutics to drug resistant cancer cells and tumors. The first step of the self-assembly process involves the encapsulation of chemotherapeutics through host-guest inclusion complexation between the β-cyclodextrin cavity and the anticancer drug. Next, the chain interaction of the PNIPAAm segment at elevated temperature drives the drug-loaded β-CD- g-(PNIPAAm- b-POEGA) x/PTX inclusion complex to hierarchically self-assemble into nanosized supramolecular assemblies at 37 °C, whereas the presence of poly(ethylene glycol) (PEG) chains in the distal end of the star-like copolymer arms impart enhanced stability to the self-assembled structure. More interestingly, this supramolecular host-guest nanocomplex promoted the enhanced cellular uptake of chemotherapeutics in MDR-1 up-regulated drug resistant cancer cells and exhibited high therapeutic efficacy for suppressing drug resistant tumor growth in an in vivo mouse model, due to the increased stability, improvement in aqueous solubility, enhanced cellular uptake, and partial membrane pump impairment by taking the advantage of PEGylation and supramolecular complex between this star-like copolymer and chemotherapeutics. This work signifies that temperature-sensitive PEGylated supramolecular nanocarriers with good biocompatibility are effective in combating MDR-1 mediated drug resistance in both in vitro and in vivo models, which is of significant importance for the advanced drug delivery platform designed to combat drug resistant cancer.
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Affiliation(s)
- Hongwei Cheng
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences , Xiamen University , Xiamen 361102 , China
| | - Xiaoshan Fan
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering , Henan Normal University , Xinxiang , 453007 , China
| | - Xiaoyuan Wang
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences , Xiamen University , Xiamen 361102 , China
| | - Enyi Ye
- Institute of Materials Research and Engineering , A*STAR (Agency for Science, Technology and Research) ; 2 Fusionopolis Way , Innovis, #08-03, Singapore 138634 , Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering , A*STAR (Agency for Science, Technology and Research) ; 2 Fusionopolis Way , Innovis, #08-03, Singapore 138634 , Singapore
| | - Zibiao Li
- Institute of Materials Research and Engineering , A*STAR (Agency for Science, Technology and Research) ; 2 Fusionopolis Way , Innovis, #08-03, Singapore 138634 , Singapore
| | - Yun-Long Wu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences , Xiamen University , Xiamen 361102 , China
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36
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Chan BQY, Cheng H, Liow SS, Dou Q, Wu YL, Loh XJ, Li Z. Poly(carbonate urethane)-Based Thermogels with Enhanced Drug Release Efficacy for Chemotherapeutic Applications. Polymers (Basel) 2018; 10:E89. [PMID: 30966125 PMCID: PMC6415165 DOI: 10.3390/polym10010089] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/09/2018] [Accepted: 01/15/2018] [Indexed: 02/05/2023] Open
Abstract
In this study, we report the synthesis and characterisation of a thermogelling poly(carbonate urethane) system comprising poly(ethylene glycol) (PEG), poly(propylene glycol) (PPG) and poly(polytetrahydrofuran carbonate) (PTHF carbonate). The incorporation of PTHF carbonate allowed for the control of the lower critical solution temperature (LCST) and decreased critical gelation concentration (CGC) of the thermogels significantly. In addition, the as-prepared thermogels displayed low toxicity against HepG2, L02 and HEK293T cells. Drug release studies were carried out using doxorubicin (Dox). Studies conducted using nude mice models with hepatocellular carcinoma revealed that the Dox-loaded poly(PEG/PPG/PTHF carbonate urethane) thermogels showed excellent in vivo anti-tumour performance and effectively inhibited tumour growth in the tested model.
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Affiliation(s)
- Benjamin Qi Yu Chan
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634, Singapore.
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore.
| | - Hongwei Cheng
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China.
| | - Sing Shy Liow
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634, Singapore.
| | - Qingqing Dou
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634, Singapore.
| | - Yun-Long Wu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China.
| | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634, Singapore.
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117575, Singapore.
- Singapore Eye Research Institute, 11 Third Hospital Avenue, Singapore 168751, Singapore.
| | - Zibiao Li
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, #08-03 Innovis, Singapore 138634, Singapore.
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37
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Moon HJ, Lee HJ, Patel M, Park S, Chang SH, Jeong B. Hepatogenic Supported Differentiation of Mesenchymal Stem Cells in a Lactobionic Acid-Conjugated Thermogel. ACS Macro Lett 2017; 6:1305-1309. [PMID: 35650787 DOI: 10.1021/acsmacrolett.7b00802] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
To investigate the effect of receptor substrate of target cells on stem cell differentiation, lactobionic acid-conjugated poly[(propylene glycol)-b-(ethylene glycol)-b-(propylene glycol)]-poly(l-alanine) (LB-PLX-PA) was synthesized, and then thermogelling systems consisting of LB-PLX-PA and PLX-PA in a ratio of 0/100 (LB-0), 5/95 (LB-5), and 20/80 (LB-20) were constructed as an injectable three-dimensional scaffold toward hepatogenic differentiation of tonsil-derived mesenchymal stem cells (TMSCs). Modulus of LB-0, LB-5, and LB-20 increased to 500-800 Pa at 37 °C (gel) due to the heat induced sol-to-gel transition of the systems during which TMSCs were incorporated into the gel. Based on biomarker expressions and hepatic biofunctions of the differentiated cells, the receptor substrate (LB)-conjugated bioactive thermogel provides compatible microenvironments for the differentiated cells, and thus gives pronounced positive results on the differentiation of the stem cells into target cells during three-dimensional culture, compared with a passive thermogel.
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Affiliation(s)
- Hyo Jung Moon
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea
| | - Hyun Jung Lee
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea
| | - Madhumita Patel
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea
| | - Sohee Park
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea
| | - Seo Hee Chang
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea
| | - Byeongmoon Jeong
- Department of Chemistry and
Nanoscience, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Korea
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38
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Liu M, Song X, Wen Y, Zhu JL, Li J. Injectable Thermoresponsive Hydrogel Formed by Alginate-g-Poly(N-isopropylacrylamide) That Releases Doxorubicin-Encapsulated Micelles as a Smart Drug Delivery System. ACS APPLIED MATERIALS & INTERFACES 2017; 9:35673-35682. [PMID: 28937214 DOI: 10.1021/acsami.7b12849] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, we have synthesized a thermoresponsive copolymer, alginate-g-poly(N-isopropylacrylamide) (alginate-g-PNIPAAm) by conjugating PNIPAAm to alginate, where PNIPAAm with different molecular weights and narrow molecular weight distribution was synthesized by atomic transfer radical polymerization. The copolymer dissolved in water or phosphate-buffered saline buffer solution at room temperature and formed self-assembled micelles with low critical micellization concentrations when the temperature increased to above their critical micellization temperatures. At higher concentration, that is, 7.4 wt % in water, the copolymer formed solutions at 25 °C and turned into thermosensitive hydrogels when temperature increased to the body temperature (37 °C). Herein, we hypothesized that the thermoresponsive hydrogels could produce self-assembled micelles with the dissolution of the alginate-g-PNIPAAm hydrogels in a biological fluid or drug release medium. If the drug was hydrophobic, the hydrogel eventually could release and produce drug-encapsulated micelles. In our experiments, we loaded the anticancer drug doxorubicin (DOX) into the alginate-g-PNIPAAm hydrogels and demonstrated that the hydrogels released DOX-encapsulated micelles in a sustained manner. The slowly released DOX-loaded micelles enhanced the cellular uptake of DOX in multidrug resistant AT3B-1 cells, showing the effect of overcoming the drug resistance and achieving better efficiency for killing the cancer cells. Therefore, the injectable thermoresponsive hydrogels formed by alginate-g-PNIPAAm and loaded with DOX turned into a smart drug delivery system, releasing DOX-encapsulated micelles in a sustained manner, showing great potential for overcoming the drug resistance in cancer therapy.
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Affiliation(s)
- Min Liu
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore
- NUS Graduate School for Integrative Sciences & Engineering (NGS), National University of Singapore , 28 Medical Drive, Singapore 117456, Singapore
| | - Xia Song
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore
| | - Yuting Wen
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore
| | - Jing-Ling Zhu
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore
| | - Jun Li
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , 7 Engineering Drive 1, Singapore 117574, Singapore
- NUS Graduate School for Integrative Sciences & Engineering (NGS), National University of Singapore , 28 Medical Drive, Singapore 117456, Singapore
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39
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Ye C, Chi H. A review of recent progress in drug and protein encapsulation: Approaches, applications and challenges. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 83:233-246. [PMID: 29208283 DOI: 10.1016/j.msec.2017.10.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 10/02/2017] [Accepted: 10/04/2017] [Indexed: 10/18/2022]
Abstract
Many drugs and proteins formulated for treatment of various diseases are not fully utilised due to environmentally problems such as degradation by enzymes or it being hydrophobic. To counter this problem, the drug and protein of interest are encapsulated by synthetic polymers where they are protected from the environment. This allows the molecule to reach its target safely and maximise its function. In this paper, we will discuss about the different techniques of encapsulation that includes emulsion evaporation, self-emulsifying drug delivery system and supercritical fluid. This will be followed by the drugs and proteins that are commonly encapsulated to counter life-threatening diseases such as cancer and diabetes. A novel method using foam was proposed and will be briefly discussed as it can play a huge role in future developments.
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Affiliation(s)
- Chen Ye
- School of Chemistry and Chemical Engineering, University of Jinan, No. 336, West Road of Nan Xinzhuang, Jinan 250022, Shandong, China.
| | - Hong Chi
- Shandong Provincial Key Laboratory of Fine Chemicals, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, Shandong, China
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Yang DP, Oo MNNL, Deen GR, Li Z, Loh XJ. Nano-Star-Shaped Polymers for Drug Delivery Applications. Macromol Rapid Commun 2017; 38. [PMID: 28895248 DOI: 10.1002/marc.201700410] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 06/28/2017] [Indexed: 12/19/2022]
Abstract
With the advancement of polymer engineering, complex star-shaped polymer architectures can be synthesized with ease, bringing about a host of unique properties and applications. The polymer arms can be functionalized with different chemical groups to fine-tune the response behavior or be endowed with targeting ligands or stimuli responsive moieties to control its physicochemical behavior and self-organization in solution. Rheological properties of these solutions can be modulated, which also facilitates the control of the diffusion of the drug from these star-based nanocarriers. However, these star-shaped polymers designed for drug delivery are still in a very early stage of development. Due to the sheer diversity of macromolecules that can take on the star architectures and the various combinations of functional groups that can be cross-linked together, there remain many structure-property relationships which have yet to be fully established. This review aims to provide an introductory perspective on the basic synthetic methods of star-shaped polymers, the properties which can be controlled by the unique architecture, and also recent advances in drug delivery applications related to these star candidates.
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Affiliation(s)
- Da-Peng Yang
- College of Chemical Engineering & Materials Science, Quanzhou Normal University, Quanzhou, 362000, China
| | - Ma Nwe Nwe Linn Oo
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive Singapore, Singapore, 637459, Singapore
| | - Gulam Roshan Deen
- Soft Materials Laboratory, Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, 637459, Singapore
| | - Zibiao Li
- Institute of Materials Research and Engineering (IMRE), A*STAR, 2 Fusionopolis Way, Innovis, #08-03, Singapore, 138634, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE), A*STAR, 2 Fusionopolis Way, Innovis, #08-03, Singapore, 138634, Singapore.,Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
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Recent development in cell encapsulations and their therapeutic applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:1247-1260. [DOI: 10.1016/j.msec.2017.04.103] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 04/18/2017] [Indexed: 02/08/2023]
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Wang S, Zhou Y, Zhuang B, Chen H, Wang L, Huang D, Zou T. Synthesis, characterization and effects of arm number on properties of amphiphilic polyurethanes as drug delivery carriers. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2017. [DOI: 10.1080/10601325.2017.1332467] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shihai Wang
- Key Laboratory of Coal Conversion and New Carbon Material of Hubei Province, College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, China
| | - Yu Zhou
- Key Laboratory of Coal Conversion and New Carbon Material of Hubei Province, College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, China
| | - Bo Zhuang
- Key Laboratory of Coal Conversion and New Carbon Material of Hubei Province, College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, China
| | - Hongxiang Chen
- Key Laboratory of Coal Conversion and New Carbon Material of Hubei Province, College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, China
| | - Lijuan Wang
- Key Laboratory of Coal Conversion and New Carbon Material of Hubei Province, College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, China
| | - Dengcheng Huang
- Key Laboratory of Coal Conversion and New Carbon Material of Hubei Province, College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, China
| | - Tao Zou
- Key Laboratory of Coal Conversion and New Carbon Material of Hubei Province, College of Chemical Engineering and Technology, Wuhan University of Science and Technology, Wuhan, China
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Ronco LI, Basterretxea A, Mantione D, Aguirresarobe RH, Minari RJ, Gugliotta LM, Mecerreyes D, Sardon H. Temperature responsive PEG-based polyurethanes “à la carte”. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.06.043] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Ding C, Li Z. A review of drug release mechanisms from nanocarrier systems. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:1440-1453. [DOI: 10.1016/j.msec.2017.03.130] [Citation(s) in RCA: 144] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 03/15/2017] [Accepted: 03/17/2017] [Indexed: 12/16/2022]
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Nutan B, Singh Chandel AK, Jewrajka SK. Synthesis and Multi-Responsive Self-Assembly of Cationic Poly(caprolactone)-Poly(ethylene glycol) Multiblock Copolymers. Chemistry 2017; 23:8166-8170. [DOI: 10.1002/chem.201701900] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Bhingaradiya Nutan
- Reverse Osmosis Membrane Division, Academy of Scientific and Innovative Research; CSIR-Central Salt and Marine Chemicals Research Institute; G. B. Marg, Bhavnagar Gujarat 364002 India
| | - Arvind K. Singh Chandel
- Reverse Osmosis Membrane Division, Academy of Scientific and Innovative Research; CSIR-Central Salt and Marine Chemicals Research Institute; G. B. Marg, Bhavnagar Gujarat 364002 India
| | - Suresh K. Jewrajka
- Reverse Osmosis Membrane Division, Academy of Scientific and Innovative Research; CSIR-Central Salt and Marine Chemicals Research Institute; G. B. Marg, Bhavnagar Gujarat 364002 India
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Recent development of synthetic nonviral systems for sustained gene delivery. Drug Discov Today 2017; 22:1318-1335. [PMID: 28428056 DOI: 10.1016/j.drudis.2017.04.001] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/02/2017] [Accepted: 04/05/2017] [Indexed: 12/22/2022]
Abstract
Sustained gene delivery is of particular importance today because it circumvents the need for repeated therapeutic administration and provides spatial and temporal control of the release profile. Better understanding of the genetic basis of diseases and advances in gene therapy have propelled significant research on biocompatible gene carriers for therapeutic purposes. Varied biodegradable polymer-based architectures have been used to create new compositions with unique properties suitable for sustained gene delivery. This review presents the most recent advances in various polymeric systems: hydrogels, microspheres, nanospheres and scaffolds, having complex architectures to encapsulate and deliver functional genes. Through the recombination of different existing polymer systems, the multicomplex systems can be further endowed with new properties for better-targeted biomedical applications.
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Thermo-Responsive Poly(N-Isopropylacrylamide)-Cellulose Nanocrystals Hybrid Hydrogels for Wound Dressing. Polymers (Basel) 2017; 9:polym9040119. [PMID: 30970798 PMCID: PMC6432186 DOI: 10.3390/polym9040119] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 03/16/2017] [Accepted: 03/21/2017] [Indexed: 11/28/2022] Open
Abstract
Thermo-responsive hydrogels containing poly(N-isopropylacrylamide) (PNIPAAm), reinforced both with covalent and non-covalent interactions with cellulose nanocrystals (CNC), were synthesized via free-radical polymerization in the absence of any additional cross-linkers. The properties of PNIPAAm-CNC hybrid hydrogels were dependent on the amounts of incorporated CNC. The thermal stability of the hydrogels decreased with increasing CNC content. The rheological measurement indicated that the elastic and viscous moduli of hydrogels increased with the higher amounts of CNC addition, representing stronger mechanical properties of the hydrogels. Moreover, the hydrogel injection also supported the hypothesis that CNC reinforced the hydrogels; the increased CNC content exhibited higher structural integrity upon injection. The PNIPAAm-CNC hybrid hydrogels exhibited clear thermo-responsive behavior; the volume phase transition temperature (VPTT) was in the range of 36 to 39 °C, which is close to normal human body temperature. For wound dressing purposes, metronidazole, an antibiotic and antiprotozoal often used for skin infections, was used as a target drug to study drug-loading and the release properties of the hydrogels. The hydrogels showed a good drug-loading capacity at room temperature and a burst drug release, which was followed by slow and sustained release at 37 °C. These results suggested that newly developed drugs containing injectable hydrogels are promising materials for wound dressing.
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Synthesis and self-assembly behavior of POSS tethered amphiphilic polymer based on poly(caprolactone) (PCL) grafted with poly(acrylic acid) (PAA) via ROP, ATRP, and CuAAC reaction. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-016-1171-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wang D, Wu LP. Nanomaterials for delivery of nucleic acid to the central nervous system (CNS). MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 70:1039-1046. [DOI: 10.1016/j.msec.2016.04.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 03/11/2016] [Accepted: 04/04/2016] [Indexed: 11/08/2022]
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Fan X, Wang X, Cao M, Wang C, Hu Z, Wu YL, Li Z, Loh XJ. “Y”-shape armed amphiphilic star-like copolymers: design, synthesis and dual-responsive unimolecular micelle formation for controlled drug delivery. Polym Chem 2017. [DOI: 10.1039/c7py00999b] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dual stimuli-responsive unimolecular micelles from “Y”-shape armed amphiphilic star-like copolymer are designed for controlled drug delivery.
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Affiliation(s)
- Xiaoshan Fan
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Xiaoyuan Wang
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology
- School of Pharmaceutical Sciences
- Xiamen University
- Xiamen
- China
| | - Mengya Cao
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Chenguang Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Zhiguo Hu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Yun-Long Wu
- Fujian Provincial Key Laboratory of Innovative Drug Target Research and State Key Laboratory of Cellular Stress Biology
- School of Pharmaceutical Sciences
- Xiamen University
- Xiamen
- China
| | - Zibiao Li
- Institute of Materials Research and Engineering
- A*STAR (Agency for Science
- Technology and Research)
- Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering
- A*STAR (Agency for Science
- Technology and Research)
- Singapore
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