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Amphiphilic copolymers in biomedical applications: Synthesis routes and property control. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 123:111952. [PMID: 33812580 DOI: 10.1016/j.msec.2021.111952] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/29/2021] [Accepted: 02/02/2021] [Indexed: 12/16/2022]
Abstract
The request of new materials, matching strict requirements to be applied in precision and patient-specific medicine, is pushing for the synthesis of more and more complex block copolymers. Amphiphilic block copolymers are emerging in the biomedical field due to their great potential in terms of stimuli responsiveness, drug loading capabilities and reversible thermal gelation. Amphiphilicity guarantees self-assembly and thermoreversibility, while grafting polymers offers the possibility of combining blocks with various properties in one single material. These features make amphiphilic block copolymers excellent candidates for fine tuning drug delivery, gene therapy and for designing injectable hydrogels for tissue engineering. This manuscript revises the main techniques developed in the last decade for the synthesis of amphiphilic block copolymers for biomedical application. Strategies for fine tuning the properties of these novel materials during synthesis are discussed. A deep knowledge of the synthesis techniques and their effect on the performance and the biocompatibility of these polymers is the first step to move them from the lab to the bench. Current results predict a bright future for these materials in paving the way towards a smarter, less invasive, while more effective, medicine.
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Polyester-based nanoparticles for nucleic acid delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 92:983-994. [DOI: 10.1016/j.msec.2018.07.027] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 07/05/2018] [Accepted: 07/11/2018] [Indexed: 12/14/2022]
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Atanase L, Desbrieres J, Riess G. Micellization of synthetic and polysaccharides-based graft copolymers in aqueous media. Prog Polym Sci 2017. [DOI: 10.1016/j.progpolymsci.2017.06.001] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Liu S, Li X, Guang N, Tian L, Mao H, Ning W. Novel amphiphilic temperature responsive graft copolymers PCL-g-P(MEO2MA-co-OEGMA) via a combination of ROP and ATRP: synthesis, characterization, and sol-gel transition. JOURNAL OF POLYMER RESEARCH 2016. [DOI: 10.1007/s10965-016-1036-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Regularly grafted polymer brush with degradable PCL backbone by ring-opening polymerization and “click” reaction: synthesis and self-assembly. JOURNAL OF POLYMER RESEARCH 2016. [DOI: 10.1007/s10965-016-0925-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Long X, Zhang Z, Han S, Tang M, Zhou J, Zhang J, Xue Z, Li Y, Zhang R, Deng L, Dong A. Structural mediation on polycation nanoparticles by sulfadiazine to enhance DNA transfection efficiency and reduce toxicity. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7542-7551. [PMID: 25801088 DOI: 10.1021/am508847j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Reducing the toxicity while maintaining high transfection efficiency is an important issue for cationic polymers as gene carriers in clinical application. In this paper, a new zwitterionic copolymer, polycaprolactone-g-poly(dimethylaminoethyl methyacrylate-co-sulfadiazine methacrylate) (PC-SDZ) with unique pH-sensitivity, was designed and prepared. The incorporation of sulfadiazine into poly(dimethylaminoethyl methacrylate) (PDMAEMA) chains successfully mediates the surface properties including compacter shell structure, lower density of positive charges, stronger proton buffer capability, and enhanced hydrophobicity, which lead to reduction in toxicity and enhancements in stability, cellular uptake, endosome escape, and transfection efficiency for the PC-SDZ2 nanoparticles (NPs)/DNA complexes. Excellent transfection efficiency at the optimal N/P ratio of 10 was observed for PC-SDZ2 NPs/DNA complexes, which was higher than that of the commercial reagent-branched polyethylenimine (PEI). The cytotoxicity was evaluated by CCK8 measurement, and the results showed significant reduction in cytotoxicity even at high concentration of complexes after sulfadiazine modification. Therefore, this work may demonstrate a new way of structural mediation of cationic polymer carriers for gene delivery with high efficiency and low toxicity.
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Affiliation(s)
- Xingwen Long
- †Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zhihui Zhang
- ∥Research Center of Basic Medical Science and Department of Immunology, Basic Medical College; Key Laboratory of Immune Microenvironment and Diseases, Ministry of Education of China; Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Shangcong Han
- †Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Minjie Tang
- †Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Junhui Zhou
- †Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jianhua Zhang
- †Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zhenyi Xue
- ∥Research Center of Basic Medical Science and Department of Immunology, Basic Medical College; Key Laboratory of Immune Microenvironment and Diseases, Ministry of Education of China; Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Yan Li
- ∥Research Center of Basic Medical Science and Department of Immunology, Basic Medical College; Key Laboratory of Immune Microenvironment and Diseases, Ministry of Education of China; Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Rongxin Zhang
- ∥Research Center of Basic Medical Science and Department of Immunology, Basic Medical College; Key Laboratory of Immune Microenvironment and Diseases, Ministry of Education of China; Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Diseases Hospital and Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin 300070, China
| | - Liandong Deng
- †Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Anjie Dong
- †Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
- §Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
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Effects of hydrophobic core components in amphiphilic PDMAEMA nanoparticles on siRNA delivery. Biomaterials 2015; 48:45-55. [PMID: 25701031 DOI: 10.1016/j.biomaterials.2015.01.026] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 12/29/2014] [Accepted: 01/20/2015] [Indexed: 12/13/2022]
Abstract
Due to their biodegradable character, polyesters such as polycaprolactone (PCL), poly(D,L-lactide) (PDLLA), and polylactic-co-glycolic acid (PLGA) were widely used as the hydrophobic cores of amphiphilic cationic nanoparticles (NPs) for siRNA delivery. However, fewer researches focused on facilitating siRNA delivery by adjusting the polyester composition of these nanoparticles. Herein, we investigated the contribution of polyester segments in siRNA delivery in vitro by introducing different ratio of DLLA moieties in PCL segments of mPEG-block-PCL-graft-poly(dimethylamino ethyl methacrylate)(PEG-b-PCL-g-PDMAEMA). It was noticed that compared with the other ratios of DLLA moieties, a certain molar ratio (about 70%) of the NPs, named mPEG45-P(CL21-co-DLLA48)-g-(PDMAEMA29)2 (PECLD-70), showed the highest gene knockdown efficiency but poorest cellular uptake ability in vitro. Further research revealed that NPs with various compositions of the polyester cores showed different physicochemical properties including particle size, zeta potential and stiffness, leading to different endocytosis mechanisms thus influencing the cellular uptake efficiency. Subsequently, we observed that the cells treated by PECLD-70 NPs/Cy5 siRNA complexes exhibited more diffuse Cy5 signal distribution than other NPs by confocal laser scanning microscope, which suggested that siRNA delivered by PECLD-70 NPs/Cy5 siRNA complexes possessed of stronger capabilities in escaping from endosome/lysosome, entering the RNA-induced silencing complex (RISC) and cutting the target mRNA efficiently. The different siRNA release profile was dominated by the degradation rate of polyester segments. Therefore, it could be concluded that the adjustment of hydrophobic core of cationic nanoparticles could significantly affect their transfection behavior and appropriate polyester composition should be concerned in designing of analogous siRNA vectors.
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Ren Y, Gao Q, Zhou C, Wei Z, Zhang Y, Li Y. Facile synthesis of well-defined linear-comb highly branched poly(ε-caprolactone) using hydroxylated polybutadiene and organocatalyst. RSC Adv 2015. [DOI: 10.1039/c4ra17276k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A simple method was proposed to synthesize well-defined linear-comb highly branched poly(ε-caprolactone) with high molecular weight and narrow polydispersity.
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Affiliation(s)
- Yingying Ren
- State Key Laboratory of Fine Chemicals
- Department of Polymer Materials
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
| | - Qing Gao
- State Key Laboratory of Fine Chemicals
- Department of Polymer Materials
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
| | - Cheng Zhou
- State Key Laboratory of Fine Chemicals
- Department of Polymer Materials
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
| | - Zhiyong Wei
- State Key Laboratory of Fine Chemicals
- Department of Polymer Materials
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
| | - Yu Zhang
- State Key Laboratory of Fine Chemicals
- Department of Polymer Materials
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
| | - Yang Li
- State Key Laboratory of Fine Chemicals
- Department of Polymer Materials
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
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Li M, Pan P, Shan G, Bao Y. Thermoresponsive poly(ϵ-caprolactone)-graft-poly(N-isopropylacrylamide) graft copolymers prepared by a combination of ring-opening polymerization and sequential azide-alkyne click chemistry. POLYM INT 2014. [DOI: 10.1002/pi.4800] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Mingming Li
- State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering; Zhejiang University; 38 Zheda Road Hangzhou 310027 China
| | - Pengju Pan
- State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering; Zhejiang University; 38 Zheda Road Hangzhou 310027 China
| | - Guorong Shan
- State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering; Zhejiang University; 38 Zheda Road Hangzhou 310027 China
| | - Yongzhong Bao
- State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering; Zhejiang University; 38 Zheda Road Hangzhou 310027 China
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Li M, Shan G, Bao Y, Pan P. Poly(ε-caprolactone)-graft-poly(N-isopropylacrylamide) amphiphilic copolymers prepared by a combination of ring-opening polymerization and atom transfer radical polymerization: Synthesis, self-assembly, and thermoresponsive property. J Appl Polym Sci 2014. [DOI: 10.1002/app.41115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mingming Li
- State Key Laboratory of Chemical Engineering; Department of Chemical and Biological Engineering; Zhejiang University; Hangzhou 310027 China
| | - Guorong Shan
- State Key Laboratory of Chemical Engineering; Department of Chemical and Biological Engineering; Zhejiang University; Hangzhou 310027 China
| | - Yongzhong Bao
- State Key Laboratory of Chemical Engineering; Department of Chemical and Biological Engineering; Zhejiang University; Hangzhou 310027 China
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Han S, Wan H, Lin D, Guo S, Dong H, Zhang J, Deng L, Liu R, Tang H, Dong A. Contribution of hydrophobic/hydrophilic modification on cationic chains of poly(ε-caprolactone)-graft-poly(dimethylamino ethylmethacrylate) amphiphilic co-polymer in gene delivery. Acta Biomater 2014; 10:670-9. [PMID: 24096149 DOI: 10.1016/j.actbio.2013.09.035] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Revised: 09/11/2013] [Accepted: 09/25/2013] [Indexed: 12/23/2022]
Abstract
Nanoparticles (NPs) assembled from amphiphilic polycations have been certified as potential carriers for gene delivery. Structural modification of polycation moieties may be an efficient route to further enhance gene delivery efficiency. In this study two electroneutral monomers with different hydrophobicities, 2-hydroxyethyl methacrylate (HEMA) and 2-hydroxyethyl acrylate (HEA), were incorporated into the cationic poly(dimethylamino ethyl methacrylate) (PDMAEMA) side-chains of amphiphilic poly(ε-caprolactone)-graft-poly(dimethylamino ethylmethacrylate) (PCD) by random co-polymerization, to obtain poly(ε-caprolactone)-graft-poly(dimethylamino ethyl methacrylate-co-2-hydroxyethyl methacrylate) (PCD-HEMA) and poly(ε-caprolactone)-graft-poly(dimethylamino ethyl methacrylate-co-2-hydroxyethyl acrylate) (PCD-HEA). Minimal HEA or HEMA moieties in PDMAEMA do not lead to statistically significant changes in particle size, zeta potential, DNA condensation properties and buffering capacity of the naked NPs. However, the incorporation of HEMA and HEA lead to reductions and increases, respectively, in the surface hydrophilicity of the naked NPs and NPs/DNA complexes, which was confirmed by water contact angle assay. These simple modifications of PDMAEMA with HEA and HEMA moieties significantly affect the gene transfection efficiency on HeLa cells in vitro: PCD-HEMA NP/DNA complexes show a much higher transfection efficiency than PCD NPs/DNA complexes, while PCD-HEA NPs/DNA complexes show a lower transfection efficiency than PCD NP/DNA complexes. Fluorescence activated cell sorter and confocal laser scanning microscope results indicate that the incorporation of hydrophobic HEMA moieties facilitates an enhancement in both cellular uptake and endosomal/lysosomal escape, leading to a higher transfection efficiency. Moreover, the process of endosomal/lysosomal escape confirmed in our research that PCD and its derivatives do not just rely on the proton sponge mechanism, but also on membrane damage due to the polycation chains, especially hydrophobic modified ones. Hence, it is proved that hydrophobic modification of cationic side-chains is a crucial route to improve gene transfection mediated by polycation NPs.
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Zhao J, Liu J, Han S, Deng H, Deng L, Liu J, Meng A, Dong A, Zhang J. Acid-induced disassemblable nanoparticles based on cyclic benzylidene acetal-functionalized graft copolymer via sequential RAFT and ATRP polymerization. Polym Chem 2014. [DOI: 10.1039/c3py01324c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Novel self-assembly graft copolymers as carriers for anti-inflammatory drug delivery. Int J Pharm 2014; 460:150-7. [DOI: 10.1016/j.ijpharm.2013.10.051] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 10/28/2013] [Accepted: 10/31/2013] [Indexed: 11/19/2022]
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Ercole F, Rodda AE, Meagher L, Forsythe JS, Dove AP. Surface grafted poly(ε-caprolactone) prepared using organocatalysed ring-opening polymerisation followed by SI-ATRP. Polym Chem 2014. [DOI: 10.1039/c3py01701j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The controlled ring-opening polymerisation (ROP) of an ATRP initiator-containing lactone, γ-BMPCL, and its copolymerisation with ε-caprolactone is reported. One resulting copolymer was successfully used as a substrate for surface initiated ATRP to produce surface-grafted poly(oligo(ethylene glycol) methacrylate) brushes.
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Affiliation(s)
- Francesca Ercole
- Department of Materials Engineering
- Monash University
- Clayton
- Australia
| | - Andrew E. Rodda
- Department of Materials Engineering
- Monash University
- Clayton
- Australia
- CSIRO
| | - Laurence Meagher
- CSIRO
- Materials Science and Engineering
- Clayton
- Australia
- Cooperative Research Centre for Polymers (CRCP)
| | - John S. Forsythe
- Department of Materials Engineering
- Monash University
- Clayton
- Australia
| | - Andrew P. Dove
- Department of Materials Engineering
- Monash University
- Clayton
- Australia
- Department of Chemistry
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Zhang W, Cheng Q, Guo S, Lin D, Huang P, Liu J, Wei T, Deng L, Liang Z, Liang XJ, Dong A. Gene transfection efficacy and biocompatibility of polycation/DNA complexes coated with enzyme degradable PEGylated hyaluronic acid. Biomaterials 2013; 34:6495-503. [DOI: 10.1016/j.biomaterials.2013.04.030] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 04/16/2013] [Indexed: 10/26/2022]
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Trandafilović L, Luyt A, Bibić N, Dimitrijević-Branković S, Georges M, Radhakrishnan T, Djoković V. Formation of nano-plate silver particles in the presence of polyampholyte copolymer. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.08.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Liu ML, Wang YX, Shi W, Cui JZ. Homo- and heterometallic complexes based on polytopic carboxylic acid: synthesis, characterization, and property. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.684382] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Ming-Li Liu
- a Department of Chemistry , Tianjin University , Tianjin 300072 , P.R. China
| | - Yu-Xia Wang
- b Department of Chemistry , Nankai University , Tianjin 300071 , P.R. China
| | - Wei Shi
- b Department of Chemistry , Nankai University , Tianjin 300071 , P.R. China
| | - Jian-Zhong Cui
- a Department of Chemistry , Tianjin University , Tianjin 300072 , P.R. China
- c Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) , Nankai University , Tianjin 300071 , P.R. China
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Cheng R, Wang X, Chen W, Meng F, Deng C, Liu H, Zhong Z. Biodegradable poly(ε-caprolactone)-g-poly(2-hydroxyethyl methacrylate) graft copolymer micelles as superior nano-carriers for “smart” doxorubicin release. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30700f] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ma L, Geng H, Song J, Li J, Chen G, Li Q. Hierarchical self-assembly of polyhedral oligomeric silsesquioxane end-capped stimuli-responsive polymer: from single micelle to complex micelle. J Phys Chem B 2011; 115:10586-91. [PMID: 21830755 DOI: 10.1021/jp203782g] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Responsive polymeric micelles have been widely studied because of their potential use in nanocontainers and nanocarriers. In this study, polyhedral oligomeric silsesquioxane (POSS) end-capped poly[2-(dimethylamino)ethyl methacrylate] (POSS-PDMAEMA), a stimuli-responsive organic-inorganic hybrid polymer, was synthesized via atom transfer radical polymerization (ATRP) using POSS-Br as a macroinitiator. The self-assembly behaviors of POSS-PDMAEMA in aqueous solution were studied by fluorescence probe, transmission electron microscopy (TEM), dynamic light scattering (DLS), high-resolution transmission electron microscopy (HRTEM), and X-ray diffraction (XRD). The results revealed two self-assembly processes of POSS-PDMAEMA. First they self-assembled into a single micelle with the POSS molecules forming a crystal core and the PDMAEMA chains stretching as a corona. Then the single micelles, as building blocks, were able to reversibly form a hierarchical micelle-on-micelle structure (complex micelle) under external stimuli.
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Affiliation(s)
- Li Ma
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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Guo S, Huang Y, Zhang W, Wang W, Wei T, Lin D, Xing J, Deng L, Du Q, Liang Z, Liang XJ, Dong A. Ternary complexes of amphiphilic polycaprolactone-graft-poly (N,N-dimethylaminoethyl methacrylate), DNA and polyglutamic acid-graft-poly(ethylene glycol) for gene delivery. Biomaterials 2011; 32:4283-92. [PMID: 21450341 DOI: 10.1016/j.biomaterials.2011.02.034] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Accepted: 02/15/2011] [Indexed: 01/05/2023]
Abstract
Binary complexes of cationic polymers and DNA were used commonly for DNA delivery, whereas, the excess cationic charge of the binary complexes mainly leads to high toxicity and unstability in vivo. In this paper, ternary complexes by coating polyglutamic acid-graft-poly(ethylene glycol)(PGA-g-mPEG) onto binary complexes of polycaprolactone-graft-poly(N,N-dimethylaminoethyl methacrylate) (PCL-g-PDMAEMA) nanoparticles (NPs)/DNA were firstly developed for effective and targeted gene delivery. The coating of PGA-g-mPEG was able to decrease the zeta potential of the nano-sized DNA complexes nearly to electroneutrality without interferring with DNA condensation ability. As a result, the stability, the escape ability from endosomes and the transfection efficiency of the complexes were enhanced. The ternary complexes of PCL-g-PDMAEMA NPs/DNA/PGA-g-mPEG demonstrated lower cytotoxicity in CCK-8 measurements and higher gene transfection efficiency than the binary complexes in vitro. In addition, Lactate dehydrogenase (LDH) assay was performed to quantify the membrane-damaging effects of the complexes, which is consistent with the conclusion of CCK-8 measurement for cytotoxicity assay. The in vivo imaging measurement and histochemical analysis of tumor sessions confirmed that the intravenous administration of the ternary complexes with red fluorescent protein (RFP) as payload led to protein expression in tumor, which was further enhanced by the targeted coating of PGA-g-PEG-folate.
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Affiliation(s)
- Shutao Guo
- Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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