1
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Correia JS, Mirón-Barroso S, Hutchings C, Ottaviani S, Somuncuoğlu B, Castellano L, Porter AE, Krell J, Georgiou TK. How does the polymer architecture and position of cationic charges affect cell viability? Polym Chem 2023; 14:303-317. [PMID: 36760606 PMCID: PMC9846193 DOI: 10.1039/d2py01012g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 12/06/2022] [Indexed: 12/12/2022]
Abstract
Polymer chemistry, composition and molar mass are factors that are known to affect cytotoxicity, however the influence of polymer architecture has not been investigated systematically. In this study the influence of the position of the cationic charges along the polymer chain on cytotoxicity was investigated while keeping constant the other polymer characteristics. Specifically, copolymers of various architectures, based on a cationic pH responsive monomer, 2-(dimethylamino)ethyl methacrylate (DMAEMA) and a non-ionic hydrophilic monomer, oligo(ethylene glycol)methyl ether methacrylate (OEGMA) were engineered and their toxicity towards a panel of cell lines investigated. Of the seven different polymer architectures examined, the block-like structures were less cytotoxic than statistical or gradient/tapered architectures. These findings will assist in developing future vectors for nucleic acid delivery.
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Affiliation(s)
| | | | | | - Silvia Ottaviani
- The John van Geest Cancer Research Centre, School of Science and Technology, Nottingham Trent UniversityNottingham NG11 8NSUK,Department of Surgery and Cancer, Division of Cancer, Imperial College London, Imperial Centre for Translational and Experimental Medicine (ICTEM)London W12 0NNUK
| | | | - Leandro Castellano
- Department of Surgery and Cancer, Division of Cancer, Imperial College London, Imperial Centre for Translational and Experimental Medicine (ICTEM)London W12 0NNUK,School of Life Sciences, John Maynard Smith Building, University of SussexBrightonUK
| | | | - Jonathan Krell
- Department of Surgery & Cancer, Imperial College LondonUK
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2
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Pereira PA, Serra MES, Serra AC, Coelho JFJ. Application of vinyl polymer-based materials as nucleic acids carriers in cancer therapy. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2022; 14:e1820. [PMID: 35637638 DOI: 10.1002/wnan.1820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 04/13/2022] [Accepted: 05/08/2022] [Indexed: 06/15/2023]
Abstract
Nucleic acid-based therapies have changed the paradigm of cancer treatment, where conventional treatment modalities still have several limitations in terms of efficacy and severe side effects. However, these biomolecules have a short half-life in vivo, requiring multiple administrations, resulting in severe suffering, discomfort, and poor patient compliance. In the early days of (nano)biotechnology, these problems caused concern in the medical community, but recently it has been recognized that these challenges can be overcome by developing innovative formulations. This review focuses on the use of vinyl polymer-based materials for the protection and delivery of nucleic acids in cancer. First, an overview of the properties of nucleic acids and their versatility as drugs is provided. Then, key information on the achievements to date, the most effective delivery methods, and the evaluation of functionalization approaches (stimulatory strategies) are critically discussed to highlight the importance of vinyl polymers in the new cancer treatment approaches. This article is categorized under: Nanotechnology Approaches to Biology > Nanoscale Systems in Biology Therapeutic Approaches and Drug Discovery > Nanomedicine for Oncologic Disease Biology-Inspired Nanomaterials > Nucleic Acid-Based Structures.
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Affiliation(s)
- Patrícia Alexandra Pereira
- Department of Chemical Engineering, CEMMPRE, University of Coimbra, Rua Sílvio Lima-Pólo II, Coimbra, Portugal
- IPN, Instituto Pedro Nunes, Associação para a Inovação e Desenvolvimento em Ciência e Tecnologia, Rua Pedro Nunes, Coimbra, Portugal
| | | | - Arménio C Serra
- Department of Chemical Engineering, CEMMPRE, University of Coimbra, Rua Sílvio Lima-Pólo II, Coimbra, Portugal
| | - Jorge F J Coelho
- Department of Chemical Engineering, CEMMPRE, University of Coimbra, Rua Sílvio Lima-Pólo II, Coimbra, Portugal
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3
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Claveau S, Kindermann M, Papine A, Díaz-Riascos ZV, Délen X, Georges P, López-Alemany R, Tirado ÒM, Bertrand JR, Abasolo I, Cigler P, Treussart F. Harnessing subcellular-resolved organ distribution of cationic copolymer-functionalized fluorescent nanodiamonds for optimal delivery of active siRNA to a xenografted tumor in mice. NANOSCALE 2021; 13:9280-9292. [PMID: 33982741 DOI: 10.1039/d1nr00146a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Diamond nanoparticles (nanodiamonds) can transport active drugs in cultured cells as well as in vivo. However, in the latter case, methods allowing the determination of their bioavailability accurately are still lacking. A nanodiamond can be made fluorescent with a perfectly stable emission and a lifetime ten times longer than that of tissue autofluorescence. Taking advantage of these properties, we present an automated quantification method of fluorescent nanodiamonds (FND) in histological sections of mouse organs and tumors, after systemic injection. We use a home-made time-delayed fluorescence microscope comprising a custom pulsed laser source synchronized on the master clock of a gated intensified array detector. This setup allows ultra-high-resolution images (120 Mpixels in size) of whole mouse organ sections to be obtained, with subcellular resolution and single-particle sensitivity. As a proof-of-principle experiment, we quantified the biodistribution and aggregation state of new cationic FNDs capable of transporting small interfering RNA inhibiting the oncogene responsible for Ewing sarcoma. Image analysis showed a low yield of nanodiamonds in the tumor after intravenous injection. Thus, for the in vivo efficacy assay, we injected the nanomedicine into the tumor. We achieved a 28-fold inhibition of the oncogene. This method can readily be applied to other nanoemitters with ≈100 ns lifetime.
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Affiliation(s)
- Sandra Claveau
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, CentraleSupélec, LuMIn, 91190 Gif-sur-Yvette, France. and Université Paris-Saclay, Institut Gustave Roussy, CNRS, Metabolic and Systemic Aspects of Oncogenesis (METSY), 94805 Villejuif, France
| | - Marek Kindermann
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, 166 10 Prague, Czech Republic and Department of Chemical Engineering, University of Chemistry and Technology, 166 28 Prague, Czech Republic
| | | | - Zamira V Díaz-Riascos
- Drug Delivery & Targeting, Functional Validation & Preclinical Research (FVPR), CIBBIM-Nanomedicine, Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona (UAB), 08035 Barcelona, Spain and Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 08035 Barcelona, Spain
| | - Xavier Délen
- Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91127 Palaiseau, France
| | - Patrick Georges
- Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91127 Palaiseau, France
| | - Roser López-Alemany
- Sarcoma Research Group, Oncobell Program, CIBERONC, Bellvitge Biomedical Research Institute (IDIBELL), 08908 L'Hospitalet de Llobregat, Barcelona, Spain
| | - Òscar Martínez Tirado
- Sarcoma Research Group, Oncobell Program, CIBERONC, Bellvitge Biomedical Research Institute (IDIBELL), 08908 L'Hospitalet de Llobregat, Barcelona, Spain
| | - Jean-Rémi Bertrand
- Université Paris-Saclay, Institut Gustave Roussy, CNRS, Metabolic and Systemic Aspects of Oncogenesis (METSY), 94805 Villejuif, France
| | - Ibane Abasolo
- Drug Delivery & Targeting, Functional Validation & Preclinical Research (FVPR), CIBBIM-Nanomedicine, Vall d'Hebron Institut de Recerca (VHIR), Universitat Autònoma de Barcelona (UAB), 08035 Barcelona, Spain and Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), 08035 Barcelona, Spain
| | - Petr Cigler
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, 166 10 Prague, Czech Republic
| | - François Treussart
- Université Paris-Saclay, ENS Paris-Saclay, CNRS, CentraleSupélec, LuMIn, 91190 Gif-sur-Yvette, France.
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4
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Guler Gokce Z, Birol SZ, Mitina N, Harhay K, Finiuk N, Glasunova V, Stoika R, Ercelen S, Zaichenko A. Novel amphiphilic block-copolymer forming stable micelles and interpolyelectrolyte complexes with DNA for efficient gene delivery. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1740988] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Zeliha Guler Gokce
- Center Genetic Engineering and Biotechnology Institute, TUBITAK Marmara Research, Kocaeli, Turkey
- Department of Nano Science and Nano Engineering, Istanbul Technical University, Istanbul, Turkey
| | - Semra Zuhal Birol
- Center Genetic Engineering and Biotechnology Institute, TUBITAK Marmara Research, Kocaeli, Turkey
- Department of Nano Science and Nano Engineering, Istanbul Technical University, Istanbul, Turkey
| | - Nataliya Mitina
- Department of Organic Chemistry, Lviv Polytechnic National University, Lviv, Ukraine
| | - Khrystyna Harhay
- Department of Organic Chemistry, Lviv Polytechnic National University, Lviv, Ukraine
| | - Nataliya Finiuk
- Department of Regulation of Cell Proliferation, Institute of Cell Biology, National Academy of Sciences of Ukraine, Lviv, Ukraine
| | - Valentina Glasunova
- Department of Physical Materials, Donetsk O. O. Galkin Institute of Physics and Engineering, National Academy of Sciences of Ukraine, Donetsk, Ukraine
| | - Rostyslav Stoika
- Department of Regulation of Cell Proliferation, Institute of Cell Biology, National Academy of Sciences of Ukraine, Lviv, Ukraine
| | - Sebnem Ercelen
- Center Genetic Engineering and Biotechnology Institute, TUBITAK Marmara Research, Kocaeli, Turkey
| | - Alexander Zaichenko
- Department of Organic Chemistry, Lviv Polytechnic National University, Lviv, Ukraine
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5
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Water-soluble nanoparticles from PEGylated linear cationic block copolymers and anionic surfactants. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4236-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Ren JM, McKenzie TG, Fu Q, Wong EHH, Xu J, An Z, Shanmugam S, Davis TP, Boyer C, Qiao GG. Star Polymers. Chem Rev 2016; 116:6743-836. [PMID: 27299693 DOI: 10.1021/acs.chemrev.6b00008] [Citation(s) in RCA: 515] [Impact Index Per Article: 64.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Recent advances in controlled/living polymerization techniques and highly efficient coupling chemistries have enabled the facile synthesis of complex polymer architectures with controlled dimensions and functionality. As an example, star polymers consist of many linear polymers fused at a central point with a large number of chain end functionalities. Owing to this exclusive structure, star polymers exhibit some remarkable characteristics and properties unattainable by simple linear polymers. Hence, they constitute a unique class of technologically important nanomaterials that have been utilized or are currently under audition for many applications in life sciences and nanotechnologies. This article first provides a comprehensive summary of synthetic strategies towards star polymers, then reviews the latest developments in the synthesis and characterization methods of star macromolecules, and lastly outlines emerging applications and current commercial use of star-shaped polymers. The aim of this work is to promote star polymer research, generate new avenues of scientific investigation, and provide contemporary perspectives on chemical innovation that may expedite the commercialization of new star nanomaterials. We envision in the not-too-distant future star polymers will play an increasingly important role in materials science and nanotechnology in both academic and industrial settings.
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Affiliation(s)
- Jing M Ren
- Polymer Science Group, Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
| | - Thomas G McKenzie
- Polymer Science Group, Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
| | - Qiang Fu
- Polymer Science Group, Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
| | - Edgar H H Wong
- Polymer Science Group, Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW Australia , Sydney, New South Wales 2052, Australia
| | - Zesheng An
- Institute of Nanochemistry and Nanobiology, College of Environmental and Chemical Engineering, Shanghai University , Shanghai 2000444, People's Republic of China
| | - Sivaprakash Shanmugam
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW Australia , Sydney, New South Wales 2052, Australia
| | - Thomas P Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia.,Department of Chemistry, University of Warwick , Coventry CV4 7AL, United Kingdom
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW Australia , Sydney, New South Wales 2052, Australia
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
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7
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Synthesis of poly(dimethylaminoethyl methacrylate) with high cloud point by RAFT polymerization under γ-irradiation. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2014.11.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Zhang T, Song X, Kang D, Zhang L, Zhang C, Jin S, Wang C, Tian J, Xing J, Liang XJ. Modified bovine serum albumin as an effective charge-reversal platform for simultaneously improving the transfection efficiency and biocompatibility of polyplexes. J Mater Chem B 2015; 3:4698-4706. [DOI: 10.1039/c5tb00548e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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9
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Li S, Xiao M, Zheng A, Xiao H. Synthesis and characterization of a novel water-soluble cationic diblock copolymer with star conformation by ATRP. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 43:350-8. [DOI: 10.1016/j.msec.2014.06.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 04/14/2014] [Accepted: 06/30/2014] [Indexed: 11/29/2022]
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10
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Yap RKL, Whittaker M, Diao M, Stuetz RM, Jefferson B, Bulmus V, Peirson WL, Nguyen AV, Henderson RK. Hydrophobically-associating cationic polymers as micro-bubble surface modifiers in dissolved air flotation for cyanobacteria cell separation. WATER RESEARCH 2014; 61:253-262. [PMID: 24934266 DOI: 10.1016/j.watres.2014.05.032] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/15/2014] [Accepted: 05/18/2014] [Indexed: 06/03/2023]
Abstract
Dissolved air flotation (DAF), an effective treatment method for clarifying algae/cyanobacteria-laden water, is highly dependent on coagulation-flocculation. Treatment of algae can be problematic due to unpredictable coagulant demand during blooms. To eliminate the need for coagulation-flocculation, the use of commercial polymers or surfactants to alter bubble charge in DAF has shown potential, termed the PosiDAF process. When using surfactants, poor removal was obtained but good bubble adherence was observed. Conversely, when using polymers, effective cell removal was obtained, attributed to polymer bridging, but polymers did not adhere well to the bubble surface, resulting in a cationic clarified effluent that was indicative of high polymer concentrations. In order to combine the attributes of both polymers (bridging ability) and surfactants (hydrophobicity), in this study, a commercially-available cationic polymer, poly(dimethylaminoethyl methacrylate) (polyDMAEMA), was functionalised with hydrophobic pendant groups of various carbon chain lengths to improve adherence of polymer to a bubble surface. Its performance in PosiDAF was contrasted against commercially-available poly(diallyl dimethyl ammonium chloride) (polyDADMAC). All synthesised polymers used for bubble surface modification were found to produce positively charged bubbles. When applying these cationic micro-bubbles in PosiDAF, in the absence of coagulation-flocculation, cell removals in excess of 90% were obtained, reaching a maximum of 99% cell removal and thus demonstrating process viability. Of the synthesised polymers, the polymer containing the largest hydrophobic functionality resulted in highly anionic treated effluent, suggesting stronger adherence of polymers to bubble surfaces and reduced residual polymer concentrations.
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Affiliation(s)
- R K L Yap
- UNSW Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia; Centre for Advanced Macromolecular Design, School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - M Whittaker
- Monash Institute of Pharmaceutical Sciences (MIPS), Monash University, IVC 3052, Australia
| | - M Diao
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - R M Stuetz
- UNSW Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - B Jefferson
- Cranfield Water Science Institute, School of Applied Sciences, Cranfield University, Bedfordshire MK43 0AL, UK
| | - V Bulmus
- Department of Chemical Engineering, Izmir Institute of Technology, Urla, 35430 Izmir, Turkey
| | - W L Peirson
- Water Research Laboratory, School of Civil and Environmental Engineering, The University of New South Wales, Manly Vale, NSW 2093, Australia
| | - A V Nguyen
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - R K Henderson
- UNSW Water Research Centre, School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia.
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11
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Li RQ, Niu YL, Zhao NN, Yu BR, Mao C, Xu FJ. Series of new β-cyclodextrin-cored starlike carriers for gene delivery. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3969-3978. [PMID: 24579564 DOI: 10.1021/am5005255] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The development of safe and effective β-cyclodextrin (β-CD)-cored cationic star gene carriers has attracted considerable attention. In this work, a series of star-shaped hemocompatible CD-PGPP, CD-PGAEPP, and CD-PGAPP vectors composed of β-CD cores and piperazine (PP)-, N-(aminoethyl)piperazine (AEPP)-, or N-(3-aminopropyl)-2-pyrrolidinone (APP)-functionalized poly(glycidyl methacrylate) arms were successfully proposed and compared for highly efficient gene delivery. Such star carriers possess plentiful secondary amine, tertiary amine, and nonionic hydroxyl groups. CD-PGPP, CD-PGAEPP, and CD-PGAPP were effective in condensing plasmid DNA into nanoparticles, whose sizes were 100-200 nm and positive ζ potentials were 25-40 mV at nitrogen/phosphate (N/P) ratios of 10 and above. CD-PGPP, CD-PGAEPP, and CD-PGAPP showed significantly lower cytotoxicity than control poly(ethylenimine) (PEI; ∼25 kDa). At most N/P ratios, CD-PGAPP exhibited better gene transfection performance than CD-PGPP and CD-PGAEPP particularly in HepG2 cells. More importantly, in comparison with PEI, all of the CD-PGPP, CD-PGAEPP, and CD-PGAPP vectors did not cause undesirable hemolysis.
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Affiliation(s)
- R Q Li
- State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers (Beijing University of Chemical Technology), Ministry of Education, Beijing Laboratory of Biomedical Materials, College of Materials Science & Engineering, Beijing University of Chemical Technology , Beijing 100029 China
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12
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Affiliation(s)
- Theoni K Georgiou
- Surfactant and Colloid Group, Department of Chemistry; University of Hull; Hull HU6 7RX UK
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13
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Krasia-Christoforou T, Georgiou TK. Polymeric theranostics: using polymer-based systems for simultaneous imaging and therapy. J Mater Chem B 2013; 1:3002-3025. [PMID: 32261003 DOI: 10.1039/c3tb20191k] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Polymer-based nanomedicine is a large and fast growing field. Polymer-based systems have been extensively used as therapeutic carriers as well as bioimaging agents for example in tumour diagnosis. However, fewer polymeric systems have been able to combine both therapy and imaging in a new field that is called theranostics (theragnostics). This review aims to summarise the recent developments and trends on polymeric theranostics. Four different types of therapies/treatments are examined namely drug delivery, gene delivery, photodynamic therapy and hyperthermia treatment combined with different imaging moieties like magnetic resonance imaging agents, fluorescent agents and microbubbles for ultrasound imaging.
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Affiliation(s)
- Theodora Krasia-Christoforou
- Department of Mechanical and Manufacturing Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus.
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14
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Bardajee GR, Hooshyar Z, Zehtabi F, Pourjavadi A. A superabsorbent hydrogel network based on poly((2-dimethylaminoethyl) methacrylate) and sodium alginate obtained by γ-radiation: synthesis and characterization. IRANIAN POLYMER JOURNAL 2012. [DOI: 10.1007/s13726-012-0089-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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15
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Chen J, Dai P, Liu M. Rapid Responsive Behaviors of the Dual Stimuli-Sensitive Poly(DEA-co-DMAEMA) Hydrogel via Comb-Type Grafted Polymeriziation. INT J POLYM MATER PO 2012. [DOI: 10.1080/00914037.2011.557805] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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16
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Varkouhi AK, Mountrichas G, Schiffelers RM, Lammers T, Storm G, Pispas S, Hennink WE. Polyplexes based on cationic polymers with strong nucleic acid binding properties. Eur J Pharm Sci 2012; 45:459-66. [DOI: 10.1016/j.ejps.2011.09.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2011] [Revised: 07/19/2011] [Accepted: 09/02/2011] [Indexed: 11/17/2022]
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17
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Banerjee R, Maiti S, Dhara D. Water-soluble nanoparticles from poly(ethylene glycol)-based cationic random copolymers and double-tail surfactant. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2011.12.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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18
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Liu G, Li X, Xiong S, Li L, Chu PK, Yeung KWK, Wu S, Xu Z. Fluorine-containing pH-responsive core/shell microgel particles: preparation, characterization, and their applications in controlled drug release. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2558-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Borges AC, Eyholzer C, Duc F, Bourban PE, Tingaut P, Zimmermann T, Pioletti DP, Månson JAE. Nanofibrillated cellulose composite hydrogel for the replacement of the nucleus pulposus. Acta Biomater 2011; 7:3412-21. [PMID: 21651996 DOI: 10.1016/j.actbio.2011.05.029] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Revised: 05/09/2011] [Accepted: 05/20/2011] [Indexed: 10/18/2022]
Abstract
The swelling and compressive mechanical behavior as well as the morphology and biocompatibility of composite hydrogels based on Tween® 20 trimethacrylate (T3), N-vinyl-2-pyrrolidone (NVP) and nanofibrillated cellulose (NFC) were assessed in the present study. The chemical structure of T3 was verified by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance, and the degree of substitution was found to be around 3. Swelling ratios of neat hydrogels composed of different concentrations of T3 and NVP were found to range from 1.5 to 5.7 with decreasing concentration of T3. Various concentrations of cellulose nanofibrils (0.2-1.6wt.%) were then used to produce composite hydrogels that showed lower swelling ratios than neat ones for a given T3 concentration. Neat and composite hydrogels exhibited a typical nonlinear response under compression. All composite hydrogels showed an increase in elastic modulus compared to neat hydrogel of about 3- to 8-fold, reaching 18kPa at 0% strain and 62kPa at 20% strain for the hydrogel with the highest NFC content. All hydrogels presented a porous and homogeneous structure, with interconnected pore cells of around 100nm in diameter. The hydrogels are biocompatible. The results of this study demonstrate that composite hydrogels reinforced with NFC may be viable as nucleus pulposus implants due to their adequate swelling ratio, which may restore the annulus fibrosus loading, and their increased mechanical properties, which could possibly restore the height of the intervertebral discs.
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Luo S, Cheng R, Meng F, Park TG, Zhong Z. Water soluble poly(histamine acrylamide) with superior buffer capacity mediates efficient and nontoxic in vitro gene transfection. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24773] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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21
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Capek I. Dispersions based on noble metal nanoparticles-DNA conjugates. Adv Colloid Interface Sci 2011; 163:123-43. [PMID: 21382609 DOI: 10.1016/j.cis.2011.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 02/15/2011] [Accepted: 02/15/2011] [Indexed: 10/18/2022]
Abstract
Many biomolecules have specific binding properties in the nanostructure formation; they are attractive materials for nanotechnology. One such promising construction material for growing a well-defined nanostructure is deoxyribonucleic acid, due to its π-electron hydrophobic core and predictable recognition attributed to the specificity of Watson-Crick base-pairing. Hydrogen bonding provides the specificity behind the matching of complementary pairs of single-stranded (ss) DNA to hybridize into a double strand (ds) of helical DNA. The double-helical structure of DNA is determined by a subtle balance of noncovalent interactions among the DNA building blocks. The most prominent role is played by the interactions between the DNA bases, where two binding motifs can be recognized: planar hydrogen bonding and vertical stacking. DNA-based nanotechnology has generated interest in a number of applications due to the specificity, programmability, and reproducibility of DNA interaction with noble metal nanoparticles. 5' and 3' thiol moieties are used to prepare composite DNAs, DNA-gold nanoparticle conjugates and nanostructures with a variety of nanoparticle-based DNA assays. Particularly, color changes induced by the association of nanometer-sized gold particles provide a basis of a simple yet highly selective method for detecting specific biological reactions between anchored ligand molecules and receptor molecules in the milieu. Colloidal noble metal nanoparticles, in particular, have found application in a variety of assay formats in which analyte binding is coupled to particle adsorption. The extreme sensitivity of the bandwidth, the peak height, and the position of the absorption (or scattering) maximum of surface plasmon resonance spectra to environmental changes have prompted the development of approaches directly monitor the DNA hybridization. The same features that make DNA an effective molecule for the storage of genetic information also render it useful as an engineering material for the construction of smart objects at the nanometer scale because of its ability to self organize into desired structures via the specific hybridization of complementary sequences. Biocompatibility between gold nanomaterials and biological scaffolding is crucial to the development of smart biomaterials. These DNA/metal colloids are interesting for their fundamental properties as well as for applications in nanomaterials science and nanobiotechnology.
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Temperature- and pH-responsive behaviour of poly(2-(2-methoxyethoxy)ethyl methacrylate-co-N,N-dimethylaminoethyl methacrylate) hydrogels. Eur Polym J 2010. [DOI: 10.1016/j.eurpolymj.2010.09.004] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Chen J, Liu M, Chen W, Zhang N, Zhu S, Zhang S, Xiong Y. Synthesis, swelling and drug-release behaviour of a poly(N,N-diethylacrylamide-co-(2-dimethylamino) ethyl methacrylate) hydrogel. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2010; 22:1049-68. [PMID: 20594406 DOI: 10.1163/092050610x498196] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In this study, poly(N,N-diethylacrylamide-co-(2-dimethylamino) ethyl methacrylate) (poly(DEA-co-DMAEMA)) hydrogels were synthesized by changing the initial DEA/DMAEMA mol ratio. The hydrogels were characterized by Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). In comparison with the PDEA hydrogel, the equilibrium swelling ratio (ESR) and lower critical solution temperature (LCST) of the hydrogels increase with the increase of DMAEMA content in the feed. The deswelling and reswelling kinetics and cytotoxicity of the different composition ratios of DEA to DMAEMA in the co-polymerized hydrogels were also investigated in detail. The absorption and release behaviour of the model drug, bovine serum albumin, were found to be dependent on hydrogel composition and environment temperature, which suggests that these materials have potential application as intelligent drug carriers.
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Affiliation(s)
- Jun Chen
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry, Lanzhou University, Lanzhou 730000, P R China
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24
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Ward MA, Georgiou TK. Thermoresponsive terpolymers based on methacrylate monomers: Effect of architecture and composition. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.23825] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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25
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Polymeric effects on DNA condensation by cationic polymers observed by atomic force microscopy. Colloids Surf B Biointerfaces 2010; 75:230-8. [DOI: 10.1016/j.colsurfb.2009.08.040] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Revised: 08/21/2009] [Accepted: 08/26/2009] [Indexed: 11/21/2022]
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26
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Meyer F, Minoia A, Raquez JM, Spasova M, Lazzaroni R, Dubois P. Poly(amino-methacrylate) as versatile agent for carbon nanotube dispersion: an experimental, theoretical and application study. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00386g] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Xu FJ, Zhang ZX, Ping Y, Li J, Kang ET, Neoh KG. Star-shaped cationic polymers by atom transfer radical polymerization from beta-cyclodextrin cores for nonviral gene delivery. Biomacromolecules 2009; 10:285-93. [PMID: 19128039 DOI: 10.1021/bm8010165] [Citation(s) in RCA: 175] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Cationic polymers with low cytotoxicity and high transfection efficiency have attracted considerable attention as nonviral carriers for gene delivery. Herein, well-defined and star-shaped CDPD consisting of beta-CD cores and P(DMAEMA) arms, and CDPDPE consisting of CDPD and P(PEGEEMA) end blocks (where CD = cyclodextrin, P(DMAEMA) = poly(2-(dimethylamino)ethyl methacrylate), P(PEGEEMA) = poly(poly(ethylene glycol)ethyl ether methacrylate)) for gene delivery were prepared via atom transfer radical polymerization (ATRP) from the bromoisobutyryl-terminated beta-CD core. The CDPD and CDPDPE exhibit good ability to condense plasmid DNA (pDNA) into 100-200 nm size nanoparticles with positive zeta potentials of 25-40 mV at nitrogen/phosphate (N/P) ratios of 10 or higher. CDPD and CDPDPE exhibit much lower cytotoxicity and higher gene transfection efficiency than high molecular weight P(DMAEMA) homopolymers. A comparison of the transfection efficiencies between CDPD and P(DMAEMA) homopolymer indicates that the unique star-shaped architecture involving the CD core can enhance the gene transfection efficiency. In addition to reducing cytotoxicity, the introduction of a biocompatible P(PEGEEMA) end block to the P(DMAEMA) arms in CDPDPE can further enhance the gene transfection efficiency.
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Affiliation(s)
- F J Xu
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029 China.
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Preparation of oxidized sodium alginate-graft-poly((2-dimethylamino) ethyl methacrylate) gel beads and in vitro controlled release behavior of BSA. Int J Pharm 2009; 371:16-24. [DOI: 10.1016/j.ijpharm.2008.12.013] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2008] [Revised: 11/07/2008] [Accepted: 12/11/2008] [Indexed: 11/18/2022]
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Layman JM, Ramirez SM, Green MD, Long TE. Influence of Polycation Molecular Weight on Poly(2-dimethylaminoethyl methacrylate)-Mediated DNA Delivery In Vitro. Biomacromolecules 2009; 10:1244-52. [DOI: 10.1021/bm9000124] [Citation(s) in RCA: 112] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- John M. Layman
- Department of Chemistry, Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - Sean M. Ramirez
- Department of Chemistry, Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - Matthew D. Green
- Department of Chemistry, Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
| | - Timothy E. Long
- Department of Chemistry, Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
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Voets IK, de Keizer A, Cohen Stuart MA. Complex coacervate core micelles. Adv Colloid Interface Sci 2009; 147-148:300-18. [PMID: 19038373 DOI: 10.1016/j.cis.2008.09.012] [Citation(s) in RCA: 310] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2008] [Revised: 09/15/2008] [Accepted: 09/29/2008] [Indexed: 10/21/2022]
Abstract
In this review we present an overview of the literature on the co-assembly of neutral-ionic block, graft, and random copolymers with oppositely charged species in aqueous solution. Oppositely charged species include synthetic (co)polymers of various architectures, biopolymers - such as proteins, enzymes and DNA - multivalent ions, metallic nanoparticles, low molecular weight surfactants, polyelectrolyte block copolymer micelles, metallo-supramolecular polymers, equilibrium polymers, etcetera. The resultant structures are termed complex coacervate core/polyion complex/block ionomer complex/interpolyelectrolyte complex micelles (or vesicles); i.e., in short C3Ms (or C3Vs) and PIC, BIC or IPEC micelles (and vesicles). Formation, structure, dynamics, properties, and function will be discussed. We focus on experimental work; theory and modelling will not be discussed. Recent developments in applications and micelles with heterogeneous coronas are emphasized.
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Affiliation(s)
| | - Eric E. Simanek
- Department of Chemistry, Texas A&M University, College Station, Texas 77843
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32
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Hou S, Yang K, Liu Z, Feng XZ. A method to increase the bioactivity of plasmid DNA by heat treatment. ACTA ACUST UNITED AC 2008; 70:1066-72. [DOI: 10.1016/j.jprot.2008.01.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2007] [Revised: 10/22/2007] [Accepted: 01/30/2008] [Indexed: 10/22/2022]
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33
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Hou S, Yang K, Yao Y, Liu Z, Feng X, Wang R, Yang Y, Wang C. DNA condensation induced by a cationic polymer studied by atomic force microscopy and electrophoresis assay. Colloids Surf B Biointerfaces 2008; 62:151-6. [DOI: 10.1016/j.colsurfb.2007.09.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2007] [Revised: 09/17/2007] [Accepted: 09/17/2007] [Indexed: 11/15/2022]
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34
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Stenzel MH. RAFT polymerization: an avenue to functional polymeric micelles for drug delivery. Chem Commun (Camb) 2008:3486-503. [DOI: 10.1039/b805464a] [Citation(s) in RCA: 191] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Xu L, Zhai M, Huang L, Peng J, Li J, Wei G. Specific stimuli-responsive antipolyelectrolyte swelling of amphiphilic gel based on methacryloxyethyl dimethyloctane ammonium bromide. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pola.22398] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Budker V, Trubetskoy V, Wolff JA. Condensation of nonstochiometric DNA/polycation complexes by divalent cations. Biopolymers 2007; 83:646-57. [PMID: 16977627 DOI: 10.1002/bip.20602] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This study found that divalent cations induced the further condensation of partially condensed DNA within nonstochiometric polycation complexes. The addition of a few mmol of a divalent cation such as calcium reduced by half the inflection point at which DNA became fully condensed by poly-L-lysine (PLL) and a variety of other polycations. The effect on DNA condensation was initially observed using a new method, which is based on the concentration-dependent self-quenching of fluorescent moieties (e.g., rhodamine) covalently linked to the DNA backbone at relatively high densities. Additional analyses, which employed ultracentrifugation, dynamic light scattering, agarose gel electrophoresis, and atomic force microscopy, confirmed the effect of divalent cations. These results provide an additional accounting of the process by which divalent cations induce greater chromatin compaction that is based on the representation of chromatin fibers as a nonstoichiometric polyelectrolyte complex. They also offer a new approach to assemble nonviral vectors for gene therapy.
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Affiliation(s)
- Vladimir Budker
- Department of Pediatrics, Waisman Center, University of Wisconsin-Madison, Madison, WI 53705-2280, USA
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37
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Emileh A, Vasheghani-Farahani E, Imani M. Preparation and Characterization of pH-Sensitive Microgels of Poly((2-dimethylamino) ethyl methacrylate). ACTA ACUST UNITED AC 2007. [DOI: 10.1002/masy.200750901] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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38
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Zhang L, Nguyen TLU, Bernard J, Davis TP, Barner-Kowollik C, Stenzel MH. Shell-Cross-Linked Micelles Containing Cationic Polymers Synthesized via the RAFT Process: Toward a More Biocompatible Gene Delivery System. Biomacromolecules 2007; 8:2890-901. [PMID: 17691844 DOI: 10.1021/bm070370g] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Block copolymers poly(2-(dimethylamino) ethyl methacrylate)-b-poly(polyethylene glycol methacrylate) (PDMAEMA-b-P(PEGMA)) were prepared via reversible addition fragmentation chain transfer polymerization (RAFT). The polymerization was found to proceed with the expected living behavior resulting in block copolymers with varying block sizes of low polydispersity (PDI <1.3). The resulting block copolymer was self-assembled in an aqueous environment, leading to the formation of pH-responsive micelles. Further stabilization of the micellar system was performed in water using ethylene glycol dimethacrylate and the RAFT process to cross-link the shell. The cross-linked micelle was found to have properties significantly different from those of the uncross-linked block copolymer micelle. While a distinct critical micelle concentration (CMC) was observed using block copolymers, the CMC was absent in the cross-linked system. In addition, a better stability against disintegration was observed when altering the ionic strength such as the absence of changes of the hydrodynamic diameter with increasing NaCl concentration. Both cross-linked and uncross-linked micelles displayed good binding ability for genes. However, the cross-linked system exhibited a slightly superior tendency to bind oligonucleotides. Cytotoxicity tests confirmed a significant improvement of the biocompatibility of the synthesized cross-linked micelle compared to that of the highly toxic PDMAEMA. The cross-linked micelles were taken up by cells without causing any signs of cell damage, while the PDMAEMA homopolymer clearly led to cell death.
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Affiliation(s)
- Ling Zhang
- Centre for Advanced Macromolecular Design (CAMD), School of Chemical Sciences and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
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Agarwal A, Unfer R, Mallapragada SK. Investigation of in vitro biocompatibility of novel pentablock copolymers for gene delivery. J Biomed Mater Res A 2007; 81:24-39. [PMID: 17109414 DOI: 10.1002/jbm.a.30920] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Novel pentablock copolymers of poly(diethylaminoethylmethacrylate) (PDEAEM), poly(ethylene oxide) (PEO), and poly(propylene oxide) (PPO), (PDEAEM-b-PEO-b-PPO-b-PEO-b-PDEAEM), were synthesized as vectors for gene delivery, and were tested for their biocompatibility on SKOV3 (human ovarian carcinoma) and A431 (human epidermoid cancer) cell lines under different in vitro conditions using various assays to elucidate the mechanism of cell death. These copolymers form micelles in aqueous solutions and can be tuned for their cytotoxicity by tailoring the weight percentage of their cationic component, PDEAEM. Copolymers with higher PDEAEM content were found to be more cytotoxic, though their polyplexes were less toxic than the polycations alone. Pentablock copolymers displayed higher cell viability than commercially available ExGen 500 at similar N:P ratios. While cell death with ExGen was found to be accompanied by an early loss of cell membrane integrity, pentablock copolymers caused very little membrane leakage. Caspase-3/7 assay confirmed that none of these polymers induced apoptosis in the cells. These pentablock copolymers form thermo-reversible gels at physiological temperatures, thereby enabling controlled gene delivery. Toxicity of the polymer gels was tested using an agarose-matrix, simulating an in vivo tumor model where injected polyplex gels would dissolve to release polyplexes, diffusing through tumor mass to reach the target cells. Twenty five weight percent of copolymer gels were found to be nontoxic or mildly cytotoxic after 24 h incubation. Transfection efficiency of the copolymers was found to be critically correlated to cytotoxicity and depended on DNA dose, polymer concentration, and N:P ratios. Transgene expression obtained was comparable to that of ExGen, but ExGen exhibited greater cell death.
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Affiliation(s)
- Ankit Agarwal
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA 50011, USA
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40
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Karppi J, Akerman S, Akerman K, Sundell A, Nyyssönen K, Penttilä I. Adsorption of drugs onto a pH responsive poly(N,N-dimethyl aminoethyl methacrylate) grafted anion-exchange membrane in vitro. Int J Pharm 2007; 338:7-14. [PMID: 17289313 DOI: 10.1016/j.ijpharm.2007.01.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2006] [Revised: 01/04/2007] [Accepted: 01/13/2007] [Indexed: 11/18/2022]
Abstract
The influence of charge and lipophilicity of acidic and basic model drugs on their adsorption onto poly(N,N-dimethyl aminoethyl methacrylic acid) grafted poly(vinylidene fluoride) (DMAEMA-PVDF) membranes was evaluated. The effect of serum proteins (albumin, IgG) and hormones (cortisol, free thyroxine (T(4)F) and thyrotropin (TSH)) on drug adsorption was also studied. Acidic model drugs (antiepileptics and benzodiazepies) adsorbed to a greater extent onto the membrane from Hepes buffer at ionic strength of 25mM and pH 7.0 than basic drugs (antidepressants) did. Adsorption of acidic model drugs was based on electrostatic interactions between positively charged tertiary amino groups of DMAEMA side-chain and acidic negatively charged drug. Albumin diminished the adsorption of drugs from serum onto the membrane. Lipophilicity was related to the adsorption of acidic model drugs from serum onto the membrane. The degree of grafting had the greatest effect on adsorption of lipophilic drugs, but no influence was observed on adsorption of hydrophilic drugs. The present results showed that acidic drugs and albumin adsorbed onto the membrane, which suggests that the PVDF-DMAEMA membrane may be suitable for separating acidic drugs from protein-free substances for subsequent monitoring and evaluation.
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Affiliation(s)
- Jouni Karppi
- Laboratory Centre, Kuopio University Hospital, P.O. Box 1777, FIN-70211 Kuopio, Finland.
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41
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Zhang Y, Xu L, Yi M, Zhai M, Wang J, Ha H. Radiation synthesis of poly[(dimethylaminoethyl methacrylate)-co-(diallyl dimethyl ammonium chloride)] hydrogels and its application as a carrier for notoginsenoside delivery. Eur Polym J 2006. [DOI: 10.1016/j.eurpolymj.2006.08.008] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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42
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Sokker HH, Ghaffar AMA, Nada AMA. Synthesis and characterization of radiation grafted copolymer for removal of nonionic organic contaminants. J Appl Polym Sci 2006. [DOI: 10.1002/app.22957] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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43
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González N, Elvira C, Román JS. Novel Dual-Stimuli-Responsive Polymers Derived from Ethylpyrrolidine. Macromolecules 2005. [DOI: 10.1021/ma050939a] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nieves González
- Department of Macromolecular Chemistry, Institute of Polymer Science and Technology, CSIC, c/Juan de la Cierva 3, 28006 Madrid, Spain
| | - Carlos Elvira
- Department of Macromolecular Chemistry, Institute of Polymer Science and Technology, CSIC, c/Juan de la Cierva 3, 28006 Madrid, Spain
| | - Julio San Román
- Department of Macromolecular Chemistry, Institute of Polymer Science and Technology, CSIC, c/Juan de la Cierva 3, 28006 Madrid, Spain
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Georgiou TK, Vamvakaki M, Phylactou LA, Patrickios CS. Synthesis, Characterization, and Evaluation as Transfection Reagents of Double-Hydrophilic Star Copolymers: Effect of Star Architecture. Biomacromolecules 2005; 6:2990-7. [PMID: 16283718 DOI: 10.1021/bm050307w] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Five star polymers of the ionizable hydrophilic 2-(dimethylamino)ethyl methacrylate (DMAEMA) and the nonionic hydrophilic methoxy hexa(ethylene glycol) methacrylate (HEGMA) were prepared by group transfer polymerization (GTP) using ethylene glycol dimethacrylate (EGDMA) as coupling agent. In particular, four isomeric star copolymers, one heteroarm, two star block and one statistical star, with 90% mol DMAEMA and 10% mol HEGMA, plus one star homopolymer of DMAEMA with degrees of polymerization of the arms equal to 20 were synthesized. The polymers were characterized in terms of their molar masses (MMs) and compositions using gel permeation chromatography (GPC) and proton nuclear magnetic resonance (1H NMR) spectroscopy, respectively. The hydrodynamic diameters in water indicated some aggregation for all the star polymers except for the statistical copolymer star, while the pK values of the DMAEMA units were around 7 for all star polymers. All the star polymers were evaluated for their ability to transfect human cervical HeLa cancer cells with the modified plasmid pRLSV40 bearing the enhanced green fluorescent protein (EGFP) as the reporter gene. All four star copolymers showed decreased toxicity compared to that of the DMAEMA star homopolymer for the same amounts of star polymer tested. The star block copolymer with outer DMAEMA blocks exhibited the highest overall transfection efficiency, 11%, compared to that of all the star polymers examined in this study. This efficiency was the same as that of the commercially available transfection reagent SuperFect.
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Affiliation(s)
- Theoni K Georgiou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus, Department of Materials Science and Technology, University of Crete, P.O. Box 2208, 710 03 Heraklion, Crete, Greece
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Kizhakkedathu JN, Nisha CK, Manorama SV, Maiti S. Water-Soluble Nanoparticles from Random Copolymer and Oppositely Charged Surfactant, 3. Macromol Biosci 2005; 5:549-58. [PMID: 15948231 DOI: 10.1002/mabi.200500023] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In this report, we investigate the nanoparticle formation between random copolymers (RCPs) of methoxy-poly(ethylene glycol) monomethacrylate (MePEGMA) and (3-(methacryloylamino)propyl)trimethylammonium chloride (MAPTAC) and oppositely charged natural surfactants, sodium oleate and sodium laurate, using turbidimetric titration, steady-state fluorescence, dynamic light scattering, and electron microscopy. Though sodium oleate and sodium laurate are sparingly soluble in water, the nanoparticle complexes formed between the RCPs and these surfactants are soluble in the entire range of compositions studied here, including the stoichiometric electronetural complexes. The spherical nature of these nanoparticle complexes is revealed by electron microscopic (EM) analysis. Dynamic light scattering (DLS) showed that the average diameters of the nanoparticles are in the range 50 to 150 nm, which is supported by EM analysis. Pyrene fluorescence experiments suggested that these soluble nanoparticles have hydrophobic cores, which may solubilize hydrophobic drug molecules. The polarity index (I(1)/I(3)) obtained from the pyrene fluorescence spectra and the conductometric measurements showed that the critical concentration of fatty acid salts needed to obtain nanoparticles are in the order of 10(-4) M. Further, the complexation of such poorly water-soluble amphiphilic surfactants with polymers offers a useful method for the immobilization of hydrophobic compounds towards water-soluble drug carrier formulations. The formation of water-soluble nanoparticles by the self-assembly of fatty acid salts upon interacting with oppositely charged poly(ethylene glycol)-based polyions.
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Affiliation(s)
- Jayachandran N Kizhakkedathu
- Department of Pathology and Lab Medicine and Centre for Blood Research, 2211 Wesbrook Mall, University of British Columbia, Vancouver, British Columbia V6T 2B5, Canada.
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Funhoff AM, Monge S, Teeuwen R, Koning GA, Schuurmans-Nieuwenbroek NME, Crommelin DJA, Haddleton DM, Hennink WE, van Nostrum CF. PEG shielded polymeric double-layered micelles for gene delivery. J Control Release 2005; 102:711-24. [PMID: 15681092 DOI: 10.1016/j.jconrel.2004.11.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2004] [Accepted: 11/01/2004] [Indexed: 10/26/2022]
Abstract
A combination of A-B and B-C block copolymers was used to encapsulate DNA inside pEG coated particles, where A is a cationic block (poly(dimethylaminoethyl methacrylate), pDMAEMA) for DNA binding and condensation, B is a hydrophobic block (poly(butylmethacrylate), pBMA) and C is a polyethylene glycol (pEG) block. The AB and BC block copolymers were synthesized by transition metal mediated radical polymerization. The AB block copolymer had a fixed pBMA molecular weight of 3800 g/mol and a varying pDMAEMA molecular weight (from 22 to 65 kg/mol), the BC block copolymer had a fixed composition (pBMA 9000 g/mol; pEG 2000 g/mol). Plasmid DNA containing particles were made via a detergent dialysis method. By this method, particles of approximately 120 nm, as determined by dynamic light scattering (DLS), with a near neutral charge were formed, independent of the DMAEMA block size. DLS measurements and gel electrophoresis indicated that the particles were very stable in cell culture medium at 37 degrees C and resistant to anionic exchange by poly-l-aspartic acid. The particles were able to transfect COS-7 and OVCAR-3 cells with minor toxicity if incubated for 1 or 4 h; incubation for 24 h resulted in an increased toxicity. This paper shows that small polyplexes with near neutral charge can be obtained via a convenient detergent dialysis method using pDMAEMA-b-pBMA and pBMA-b-pEG. These particles may be interesting for in vivo experiments where particles with high positive charges have adverse interactions with blood components.
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Affiliation(s)
- Arjen M Funhoff
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, P.O. Box 80082, 3508 TB, Utrecht, The Netherlands
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Funhoff AM, van Nostrum CF, Lok MC, Fretz MM, Crommelin DJA, Hennink WE. Poly(3-guanidinopropyl methacrylate): a novel cationic polymer for gene delivery. Bioconjug Chem 2005; 15:1212-20. [PMID: 15546186 DOI: 10.1021/bc049864q] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A cationic polymethacrylate with a guanidinium side group was designed in order to create a polymer with cell membrane-penetrating properties such as Tat or other arginine-rich peptides. The polymer, poly(3-guanidinopropyl methacrylate), abbreviated as pGuaMA, was synthesized by free radical polymerization. The DNA-condensing properties of pGuaMA (Mw 180 kDa) were investigated via dynamic light scattering and zeta potential measurements, and small, positively charged particles (110 nm, +37 mV) were found. It was shown that polyplexes based on pGuaMA were able to transfect COS-7 cells efficiently in the absence of serum, while under the same conditions poly(arginine) (pArg) polyplexes did not show detectable transfection levels. Addition of a membrane-disrupting peptide, INF 7, derived from the influenza virus, to preformed pGuaMA polyplexes did result in approximately 2 times increased transfection levels. DLS, zeta potential measurements, gel electrophoresis, and ethidium bromide displacement measurements indicated that serum induced aggregation of the polyplexes at high polymer/plasmid ratios, while at low polymer/plasmid ratios the polarity of the polyplexes reversed likely due to adsorption of negatively charged proteins on their surface. Likely, the unfavorable interactions of pGuaMA polyplexes with serum proteins is the reason for the absent transfection activity of these polyplexes in the presence of serum. Confocal laser scanning microscopy indicated cellular internalization via endocytosis of both polyplexes and free polymer. Thus, pGuaMA polyplexes enter cells, as reported for other polyplexes, by endocytosis and not, as hypothesized, via direct membrane passage.
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Affiliation(s)
- Arjen M Funhoff
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, P.O. Box 80082, 3508 TB, Utrecht, The Netherlands
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Sahnoun M, Charreyre MT, Veron L, Delair T, D'Agosto F. Synthetic and characterization aspects of dimethylaminoethyl methacrylate reversible addition fragmentation chain transfer (RAFT) polymerization. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/pola.20813] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Agarwal A, Unfer R, Mallapragada SK. Novel cationic pentablock copolymers as non-viral vectors for gene therapy. J Control Release 2004; 103:245-58. [PMID: 15710515 DOI: 10.1016/j.jconrel.2004.11.022] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2004] [Revised: 11/09/2004] [Accepted: 11/17/2004] [Indexed: 11/25/2022]
Abstract
New cationic pentablock copolymers of poly(diethylaminoethylmethacrylate) (PDEAEM), poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO)--PDEAEM-b-PEO-b-PPO-b-PEO-b-PDEAEM--synthesized in our laboratory were investigated for their potential as non-viral vectors for gene therapy. Agarose gel studies showed that the copolymers effectively condensed plasmid DNA to form polyplexes, and also protected plasmids against nuclease degradation. Light scattering and transmission electron microscopy were used to analyze the apparent size, molecular weight and morphology of these polyplexes. Lactate dehydrogenase assay was employed to find the cytotoxicity limits of the polymers and polyplexes on a human ovarian cancer cell line. The polymers showed much less cytotoxicity than commercially available ExGen 500 (linear polyethyleneimine). By changing the relative lengths of the blocks in the copolymers, it was found that the cytotoxicity of these copolymers could be tailored. The micellar structures of these copolymers in aqueous solutions and their pH-sensitive protonation were added advantages. In vitro transfection efficiencies of the polymers using green fluorescent protein (pEGFP-N1) and luciferase (pRL-CMV) reporter genes were found comparable to ExGen 500. Besides, aqueous solutions of these pentablock copolymers have been shown to exhibit thermodynamic phase transitions and thermoreversible gelation, a quality that could allow subcutaneous/intramuscular injections of these polymers for controlled gene delivery over time.
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Affiliation(s)
- Ankit Agarwal
- Department of Chemical Engineering, Iowa State University, 3035 Sweeney Hall, Ames, IA-50011-2230, USA
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Nisha CK, Manorama SV, Kizhakkedathu JN, Maiti S. Water-soluble complexes from random copolymer and oppositely charged surfactant. 2. Complexes of poly(ethylene glycol)-based cationic random copolymer and bile salts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:8468-8475. [PMID: 15379462 DOI: 10.1021/la049337v] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The complexes formed between the positively charged random copolymers (RCPs) of methoxy-poly(ethylene glycol) monomethacrylate (MePEGMA) and (3-(methacryloylamino)propyl)trimethylammonium chloride (MAPTAC) with oppositely charged biosurfactants (bile salts) were studied using turbidimetric titration, steady-state fluorescence, dynamic light scattering, and electron microscopy. Studies showed that the complexes of the RCPs of MAPTAC and MePEGMA with less than 68 mol % of PEG content precipitate in water, whereas the complexes of the copolymer with 89 and 94 mol % of PEG content do not precipitate in the entire range of composition of the mixture including stoichiometric compositions when the electroneutral complexes are formed. The complexes with true hydrophobic domains, which are a prerequisite characteristic to serve as a carrier, can be obtained at much lower concentration than the critical micelle concentration of the corresponding surfactant. For a particular surfactant, hydrophobic domains are obtained at lower Z-/+ for the random copolymer with lower PEG content. The hydrodynamic radii of these complexes vary over a range of 20-35 nm. Overall results reveal that these complexes are qualitatively similar to the polyion complex micelles or block ionomer complexes obtained from the block copolymers and oppositely charged surfactants. As the surfactants used in this study are biocompatible, we hope that these soluble particles will be promising vectors in the field of drug delivery.
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Affiliation(s)
- C K Nisha
- Materials Science Group, Inorganic and Physical Chemistry Division, Indian Institute of Chemical Technology, CSIR, Hyderabad 500007
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