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Alenazi AS, El-Bagory IM, Yassin AB, Alanazi FK, Alsarra IA, Haq N, Bayomi MA, Shakeel F. Design of polymeric nanoparticles for oral delivery of capreomycin peptide using double emulsion technique: Impact of stress conditions. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103326] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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2
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Cheon SH, Kim ZH, Choi HY, Kang SH, Nam HJ, Kim JY, Kim DI. Effective delivery of siRNA to transgenic rice cells for enhanced transfection using PEI-based polyplexes. BIOTECHNOL BIOPROC E 2017. [DOI: 10.1007/s12257-017-0155-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Andrews GP, Laverty TP, Jones DS. Rheological Analysis of Polymer Interactions and Ageing of Poly(Methylvinylether-Co-Maleic Anhydride)/Poly(Vinyl Alcohol) Binary Networks and Their Effects on Mucoadhesion. J Pharm Sci 2015; 104:4329-4338. [DOI: 10.1002/jps.24679] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Revised: 08/22/2015] [Accepted: 08/26/2015] [Indexed: 11/11/2022]
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4
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Grinberg VY, Senin AA, Grinberg NV, Burova TV, Dubovik AS, Potekhin SA, Erukhimovich IY. High pressure effects under phase separation of aqueous solutions of poly(N-isopropylacryamide): A HS-DSC study. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.03.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Shi C, Ahmad Khan S, Wang K, Schneider M. Improved delivery of the natural anticancer drug tetrandrine. Int J Pharm 2015; 479:41-51. [DOI: 10.1016/j.ijpharm.2014.12.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 12/10/2014] [Accepted: 12/11/2014] [Indexed: 12/18/2022]
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6
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Negishi J, Nam K, Kimura T, Hashimoto Y, Funamoto S, Higami T, Fujisato T, Kishida A. Fabrication of a heparin-PVA complex hydrogel for application as a vascular access. J Biomed Mater Res B Appl Biomater 2014; 102:1426-33. [DOI: 10.1002/jbm.b.33121] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 01/23/2014] [Accepted: 01/30/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Jun Negishi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University; Chiyoda-ku Tokyo 101-0062 Japan
| | - Kwangwoo Nam
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University; Chiyoda-ku Tokyo 101-0062 Japan
- Japan Science and Technology Agency; CREST, Chiyoda-ku Tokyo 102-0075 Japan
| | - Tsuyoshi Kimura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University; Chiyoda-ku Tokyo 101-0062 Japan
- Japan Science and Technology Agency; CREST, Chiyoda-ku Tokyo 102-0075 Japan
| | - Yoshihide Hashimoto
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University; Chiyoda-ku Tokyo 101-0062 Japan
| | - Seiichi Funamoto
- Department of Thoracic and Cardiovascular Surgery; Sapporo Medical University; S1W16, Sapporo City Hokkaido 060-8543 Japan
| | - Tetsuya Higami
- Department of Thoracic and Cardiovascular Surgery; Sapporo Medical University; S1W16, Sapporo City Hokkaido 060-8543 Japan
| | - Toshiya Fujisato
- Department of Biomedical Engineering; Osaka Institute of Technology; Asahi-ku Osaka 535-8585 Japan
| | - Akio Kishida
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University; Chiyoda-ku Tokyo 101-0062 Japan
- Japan Science and Technology Agency; CREST, Chiyoda-ku Tokyo 102-0075 Japan
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Ivanova NV, Kuzmina ML. Protocols for dry DNA storage and shipment at room temperature. Mol Ecol Resour 2013; 13:890-8. [PMID: 23789643 PMCID: PMC3910151 DOI: 10.1111/1755-0998.12134] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 06/04/2013] [Accepted: 06/04/2013] [Indexed: 01/23/2023]
Abstract
The globalization of DNA barcoding will require core analytical facilities to develop cost-effective, efficient protocols for the shipment and archival storage of DNA extracts and PCR products. We evaluated three dry-state DNA stabilization systems: commercial Biomatrica(®) DNAstable(®) plates, home-made trehalose and polyvinyl alcohol (PVA) plates on 96-well panels of insect DNA stored at 56 °C and at room temperature. Controls included unprotected samples that were stored dry at room temperature and at 56 °C, and diluted samples held at 4 °C and at -20 °C. PCR and selective sequencing were performed over a 4-year interval to test the condition of DNA extracts. Biomatrica(®) provided better protection of DNA at 56 °C and at room temperature than trehalose and PVA, especially for diluted samples. PVA was the second best protectant after Biomatrica(®) at room temperature, whereas trehalose was the second best protectant at 56 °C. In spite of lower PCR success, the DNA stored at -20 °C yielded longer sequence reads and stronger signal, indicating that temperature is a crucial factor for DNA quality which has to be considered especially for long-term storage. Although it is premature to advocate a transition to DNA storage at room temperature, dry storage provides an additional layer of security for frozen samples, protecting them from degradation in the event of freezer failure. All three forms of DNA preservation enable shipment of dry DNA and PCR products between barcoding facilities.
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Affiliation(s)
- Natalia V Ivanova
- Biodiversity Institute of Ontario, University of Guelph, Guelph, ON, N1G 2W1, Canada.
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Saigal A, Ng WK, Tan RB, Chan SY. Development of controlled release inhalable polymeric microspheres for treatment of pulmonary hypertension. Int J Pharm 2013; 450:114-22. [DOI: 10.1016/j.ijpharm.2013.04.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 03/25/2013] [Accepted: 04/09/2013] [Indexed: 10/26/2022]
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9
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Andreasen SØ, Chong SF, Wohl BM, Goldie KN, Zelikin AN. Poly(vinyl alcohol) physical hydrogel nanoparticles, not polymer solutions, exert inhibition of nitric oxide synthesis in cultured macrophages. Biomacromolecules 2013; 14:1687-95. [PMID: 23560438 DOI: 10.1021/bm400369u] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Hydrogel nanoparticles (HNP) are an emerging tool of biomedicine with unique materials characteristics, scope, and utility. These hydrated, soft colloidal carriers can penetrate through voids with dimensions narrower than the size of the particle, provide stabilization for fragile biological cargo and allow diffusion and exchange of solutes with external phase. However, techniques to assemble HNP are few; solitary examples exist of biocompatible polymers being formulated into HNP; and knowledge on the biomedical properties of HNP remains rather cursory. In this work, we investigate assembly of HNP based on a polymer with decades of prominence in the biomedical field, poly(vinyl alcohol), PVA. We develop a novel method for production of PVA HNP through nanoprecipitation-based assembly of polymer nanoparticles and subsequent physical hydrogelation of the polymer. Polymer nanoparticles and HNP were visualized using scanning electron microscopy and fluorescence imaging, and characterized using dynamic light scattering and zeta potential measurements. Interaction of PVA HNP with mammalian cells was investigated using flow cytometry, viability screening, and measurements of nitric oxide production by cultured macrophages. The latter analyses revealed that PVA administered as a polymer solution or in the form of HNP resulted in no measurable increase in production of the inflammation marker. Unexpectedly, PVA HNP exerted a pronounced inhibition of NO synthesis by stimulated macrophages, that is, had an anti-inflammatory activity. This effect was accomplished with a negligible change in the cell viability and was not observed when PVA was administered as a polymer solution. To the best of our knowledge, this is the first observation of inhibition of NO synthesis in macrophages by administered nanoparticles and specifically hydrogel nanoparticles. Taken together, our results present PVA HNP as promising colloidal hydrogel nanocarriers for biomedical applications, specifically drug delivery and assembly of intracellular biosensors.
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Menon JU, Kona S, Wadajkar AS, Desai F, Vadla A, Nguyen KT. Effects of surfactants on the properties of PLGA nanoparticles. J Biomed Mater Res A 2012; 100:1998-2005. [PMID: 22566409 DOI: 10.1002/jbm.a.34040] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 12/01/2011] [Accepted: 12/08/2011] [Indexed: 12/24/2022]
Abstract
The objective of this study was to investigate the physical characteristics of poly(D,L-lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) coated with two surfactants, Pluronic or the commonly used polyvinyl alcohol (PVA); and determine their in vitro efficiency as drug carriers for cancer therapy. Free surfactant cytotoxicity results indicated that Pluronic F127 (PF127) was most cytocompatible among the Pluronics tested and hence chosen for coating PLGA NPs for further studies. Release studies using doxorubicin (DOX) as a drug model showed sustained release of DOX from both PVA- and PF127-coated PLGA NPs (PLGA-PVA and PLGA-PF127, respectively) over 28 days. Further, there was no significant difference in human dermal fibroblasts and human aortic smooth muscle cell survival when exposed to both types of NPs. Cellular uptake studies demonstrated that uptake of both nanoparticle types was dose-dependent for both prostate and breast cancer cells. However, these cancer cells internalized more PLGA-PF127 NPs than PLGA-PVA NPs. Moreover, studies showed that drug-loaded PLGA-PF127 NPs not only killed more cancer cells than drug-loaded PLGA-PVA NPs, but also overcame drug resistance in LNCaP, MDA-MB-231, and MDA-MB-468 cancer cells on re-exposure. These results indicate that PLGA-PF127 NPs can form a promising system that not only delivers anti-cancer drugs, but also overcomes drug resistance, which is prevalent in most cancer cells.
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Affiliation(s)
- Jyothi U Menon
- Department of Bioengineering, University of Texas at Arlington, Arlington, Texas, USA
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11
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Tataru G, Popa M, Costin D, Desbrieres J. Microparticles based on natural and synthetic polymers for ophthalmic applications. J Biomed Mater Res A 2012; 100:1209-20. [PMID: 22344747 DOI: 10.1002/jbm.a.34069] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Revised: 11/03/2011] [Accepted: 11/17/2011] [Indexed: 11/09/2022]
Abstract
Sodium salt of carboxymethylcellulose/poly(vinyl alcohol) particles suitable for application in ocular drug administration were prepared by crosslinking with epichlorohydrin in an alkaline medium, in reverse emulsion. The influence of parameters related with the particles elaboration process (ratio between polymer mixture and crosslinking agent, concentration of polymer solution, duration of crosslinking reaction, stirring intensity, etc.) based on their composition, size, and swelling ability was studied. Obtained microparticles fulfill the requirements for biomaterials-they are formed from biocompatible polymers; the acute toxicity value (LD(50)) is high enough to consider these materials as weakly toxic (hence able to introduce within the organism); they are able to include and release drugs in a controlled way. The in vivo adrenalin ocular delivery from the microparticles was tested on voluntary human patient. The particles showed good adhesion properties without irritation to the patient and proved the capability to treat the ocular congestion.
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Affiliation(s)
- G Tataru
- Faculty of Chemical Engineering and Protection of the Environment, Department of Natural and Synthetic Polymers, Technical University Gheorghe Asachi of Iasi, Iasi, Romania
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12
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Hanczyc P, Norden B, Åkerman B. DNA in a Polyvinyl Alcohol Matrix and Interactions with Three Intercalating Cyanine Dyes. J Phys Chem B 2011; 115:12192-201. [DOI: 10.1021/jp205374t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Piotr Hanczyc
- Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
- Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, 50-370, Wroclaw, Poland
| | - Bengt Norden
- Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
| | - Björn Åkerman
- Department of Chemical and Biological Engineering, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
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Alves MH, Jensen BEB, Smith AAA, Zelikin AN. Poly(Vinyl Alcohol) Physical Hydrogels: New Vista on a Long Serving Biomaterial. Macromol Biosci 2011; 11:1293-313. [DOI: 10.1002/mabi.201100145] [Citation(s) in RCA: 166] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2011] [Indexed: 12/16/2022]
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Preparation of a Nanoscaled Poly(vinyl alcohol)/Hydroxyapatite/DNA Complex Using High Hydrostatic Pressure Technology for In Vitro and In Vivo Gene Delivery. JOURNAL OF DRUG DELIVERY 2011; 2011:962743. [PMID: 21773048 PMCID: PMC3134933 DOI: 10.1155/2011/962743] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 02/21/2011] [Accepted: 03/14/2011] [Indexed: 11/19/2022]
Abstract
Our previous research showed that poly(vinyl alcohol) (PVA) nanoparticles incorporating DNA with hydrogen bonds obtained by high hydrostatic pressurization are able to deliver DNA without any significant cytotoxicity. To enhance transfection efficiency of PVA/DNA nanoparticles, we describe a novel method to prepare PVA/DNA nanoparticles encapsulating nanoscaled hydroxyapatites (HAps) prepared by high hydrostatic pressurization (980 MPa), which is designed to facilitate endosomal escape induced by dissolving HAps in an endosome. Scanning electron microscopic observation and dynamic light scattering measurement revealed that HAps were significantly encapsulated in PVA/HAp/DNA nanoparticles. The cytotoxicity, cellular uptake, and transgene expression of PVA/HAp/DNA nanoparticles were investigated using COS-7 cells. It was found that, in contrast to PVA/DNA nanoparticles, their internalization and transgene expression increased without cytotoxicity occurring. Furthermore, a similar level of transgene expression between plasmid DNA and PVA/HAp/DNA nanoparticles was achieved using in vivo hydrodynamic injection. Our results show a novel method of preparing PVA/DNA nanoparticles encapsulating HAp nano-crystals by using high hydrostatic pressure technology and the potential use of HAps as an enhancer of the transfection efficiency of PVA/DNA nanoparticles without significant cytotoxicity.
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Negishi J, Nam K, Kimura T, Fujisato T, Kishida A. High-hydrostatic pressure technique is an effective method for the preparation of PVA–heparin hybrid gel. Eur J Pharm Sci 2010; 41:617-22. [DOI: 10.1016/j.ejps.2010.09.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2010] [Revised: 08/06/2010] [Accepted: 09/02/2010] [Indexed: 10/19/2022]
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16
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Jitjumnong P, Wanichwecharungruang SP, Arayachukeat S. Self-assembly of negatively charged poly(vinyl alcohol) derivatives. Macromol Res 2010. [DOI: 10.1007/s13233-010-0816-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Bonakdar S, Emami SH, Shokrgozar MA, Farhadi A, Ahmadi SAH, Amanzadeh A. Preparation and characterization of polyvinyl alcohol hydrogels crosslinked by biodegradable polyurethane for tissue engineering of cartilage. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2010. [DOI: 10.1016/j.msec.2010.02.017] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Salama RO, Traini D, Chan HK, Sung A, Ammit AJ, Young PM. Preparation and Evaluation of Controlled Release Microparticles for Respiratory Protein Therapy. J Pharm Sci 2009; 98:2709-17. [DOI: 10.1002/jps.21653] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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19
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Sheikh FA, Barakat NAM, Kanjwal MA, Aryal S, Khil MS, Kim HY. Novel self-assembled amphiphilic poly(epsilon-caprolactone)-grafted-poly(vinyl alcohol) nanoparticles: hydrophobic and hydrophilic drugs carrier nanoparticles. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:821-831. [PMID: 19020953 DOI: 10.1007/s10856-008-3637-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2008] [Accepted: 10/20/2008] [Indexed: 05/27/2023]
Abstract
In the present study, we have aimed to produce nanoparticles (NPs) possessing the capability of carrying both of the hydrophobic and hydrophilic drugs and reveal significant release for both drug types. Poly(epsilon-caprolactone) (PCL) grafted poly(vinyl alcohol) (PVA) copolymer (PCL-g-PVA) has been prepared and shaped in nano-particulate form to be adequate for carrying the drugs. Stannous octoate (Sn(II)Oct(2)) was used to catalyze PVA and epsilon-caprolactone monomer to chemically bond. Moreover, this catalyst enhanced side chain polymerization reaction for the utilized epsilon-caprolactone monomer to form poly(epsilon-caprolactone) (PCL). The formed PCL was attached as branches with PVA backbone. (1)H NMR has confirmed formation of PCL and grafting of PVA by this new polymer. Moreover, the vibration modes in the functional groups of PCL-g-PVA have been detected by FT-IR. The thermal alteration in the grafted polymer was checked by TGA analysis. The successfully synthesized grafted copolymer was able to self-aggregate into NPs by direct dialysis method. The size, morphology and charges associated with the obtained NPs were analyzed by DLS, TEM and ELS, respectively. PCL-g-PVA NPs were investigated as drug carrier models for hydrophobic and hydrophilic anti cancer drugs; paclitaxel and doxorubicin. In vitro drug release experiments were conducted; the loaded NPs reveal continuous and sustained release form for both drugs, up to 20 and 15 days for paclitaxel and doxorubicin, respectively. However, in a case of using pure drugs only, both drugs completely released within 1-2 h. The overall obtained results strongly recommend the use these novel NPs in future drug delivery systems.
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Affiliation(s)
- Faheem A Sheikh
- Department of Bionano System Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea
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Shin MK, Kim SH, Jung SI, Kim SI, Kim SJ, Kim BJ, So I. The effect of DNA on mechanical properties of nanofiber hydrogels. APPLIED PHYSICS LETTERS 2008; 93. [DOI: 10.1063/1.3009204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
Uniform poly(vinyl alcohol) (PVA) nanofiber gels incorporating double-stranded deoxyribonucleic acid (DNA) were fabricated without the aid of cross-linkers employing electrospinning. Creep and tensile tests of the DNA/PVA nanofiber gels were carried out in an aqueous medium to analyze interactions between the DNA and PVA. The DNA/PVA gels had a higher elastic modulus than the PVA gel. The viscosity with increasing external load was calculated by applying the Burger model to the creep curves. We conclude that DNA is relatively weakly bound with the PVA chains, although the elastic modulus of the DNA/PVA gels was higher than that of PVA gel.
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Affiliation(s)
- Min Kyoon Shin
- Hanyang University 1 Center for Bio-Artificial Muscle and Department of Biomedical Engineering, , Seoul 133-791, Republic of Korea
| | - Shi Hyeong Kim
- Hanyang University 1 Center for Bio-Artificial Muscle and Department of Biomedical Engineering, , Seoul 133-791, Republic of Korea
| | - Sung-il Jung
- Hanyang University 1 Center for Bio-Artificial Muscle and Department of Biomedical Engineering, , Seoul 133-791, Republic of Korea
| | - Sun I. Kim
- Hanyang University 1 Center for Bio-Artificial Muscle and Department of Biomedical Engineering, , Seoul 133-791, Republic of Korea
| | - Seon Jeong Kim
- Hanyang University 1 Center for Bio-Artificial Muscle and Department of Biomedical Engineering, , Seoul 133-791, Republic of Korea
| | - Byung Joo Kim
- Seoul National University 2 Center for Bio-Artificial Muscle and Department of Physiology, , Seoul 110-744, Republic of Korea
| | - Insuk So
- Seoul National University 2 Center for Bio-Artificial Muscle and Department of Physiology, , Seoul 110-744, Republic of Korea
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Luadthong C, Tachaprutinun A, Wanichwecharungruang S. Synthesis and characterization of micro/nanoparticles of poly(vinylalcohol-co-vinylcinnamate) derivatives. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2008.02.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Papancea A, Valente AJM, Patachia S, Miguel MG, Lindman B. PVA-DNA cryogel membranes: characterization, swelling, and transport studies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:273-279. [PMID: 18052399 DOI: 10.1021/la702639d] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Double-stranded (ds) DNA from salmon testes has been incorporated into PVA hydrogels obtained by a technique of repeated freezing and thawing. The cryogels obtained are free of potential toxic species like chemical cross-linkers, and consequently, they can be used in pharmaceutical or medical applications. These cryogels show a good mechanical resistance and a white and opaque appearance caused by a heterogeneous porous structure. Encapsulated DNA molecules can be in a compacted or an extended conformation in the PVA matrix and can be controlled by tailoring the degree of crystallinity of the PVA network; this is supported by fluorescence microscopy and UV and FTIR spectroscopic studies. The two forms of encapsulated DNA were observed for different types of matrixes: an extended one in a more crystalline network and a globular one in a more amorphous one. Different associations of base pairs have also been observed. PVA cryogel crystallinity could be tailored by the cryogel contact with different salt solutions. Cryogel surface (scanning electron microscopy) and bulk morphology (porosimetry), swelling, DNA retention, and delivery kinetics have also been studied. All these investigations clearly show strong interactions between PVA and DNA.
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Affiliation(s)
- Adina Papancea
- Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal, Department of Chemistry, Transilvania University of Brasov, 29 Eroilor Str., Brasov, Romania
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Kimura T, Iwai S, Moritan T, Nam K, Mutsuo S, Yoshizawa H, Okada M, Furuzono T, Fujisato T, Kishida A. Preparation of poly(vinyl alcohol)/DNA hydrogels via hydrogen bonds formed on ultra-high pressurization and controlled release of DNA from the hydrogels for gene delivery. J Artif Organs 2007; 10:104-8. [PMID: 17574513 DOI: 10.1007/s10047-006-0367-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2006] [Accepted: 11/18/2006] [Indexed: 01/31/2023]
Abstract
Poly(vinyl alcohol) (PVA) hydrogels interacting with DNA mediated by hydrogen bonds (PVA/DNA hydrogel) were developed using ultra-high pressure (UHP) technology. The goal was to create a new method of gene delivery by controlled release of DNA. Mixed solutions of DNA and PVA at various concentrations were pressurized at 10,000 atmospheres at 37 degrees C for 10 min. PVA/DNA hydrogels with good formability were produced at PVA concentrations of more than 5% w/v. The presence of DNA in the obtained hydrogels was confirmed by spectroscopic analysis and nucleic acid dye staining. DNA release from the hydrogels was investigated using PVA/DNA hydrogel samples of 5% and 10% w/v formed by UHP treatment or by conventional freeze-thaw methods. The DNA release curves from both types of samples showed a rapid phase in the initial 15 h followed by a sustained release phase. However, there was a difference in the amount of DNA released. Less DNA was released by the pressurized hydrogels than by the freeze-thaw hydrogels. Also, the cumulative amount of DNA released decreased as the PVA content in the hydrogels increased. These results indicate that DNA release from the hydrogels can be modulated by changing the preparation method and the PVA content. Furthermore, it was demonstrated that DNA release could be controlled by varying the amount and duration of pressurizing used to form the hydrogels. Intact fractions of plasmid DNA released from the hydrogels were separated by agarose gel electrophoretic analysis. These results suggest that, using controlled release, DNA from PVA/DNA hydrogels formed by UHP treatment can be transfected into cells.
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Affiliation(s)
- Tsuyoshi Kimura
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-0062, Japan
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