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Rodriguez-Rivera GJ, Green M, Shah V, Leyendecker K, Cosgriff-Hernandez E. A user's guide to degradation testing of polyethylene glycol-based hydrogels: From in vitro to in vivo studies. J Biomed Mater Res A 2024; 112:1200-1212. [PMID: 37715481 DOI: 10.1002/jbm.a.37609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/21/2023] [Accepted: 08/29/2023] [Indexed: 09/17/2023]
Abstract
Poly(ethylene glycol) (PEG)-based hydrogels have gained significant attention in the field of biomedical applications due to their versatility and antifouling properties. Acrylate-derivatized PEG hydrogels (PEGDA) are some of the most widely studied hydrogels; however, there has been debate around the degradation mechanism and predicting resorption rates. Several factors influence the degradation rate of PEG hydrogels, including backbone and endgroup chemistry, macromer molecular weight, and polymer concentration. In addition to hydrogel parameters, it is necessary to understand the influence of biological and environmental conditions (e.g., pH and temperature) on hydrogel degradation. Rigorous methods for monitoring degradation in both in vitro and in vivo settings are also critical to hydrogel design and development. Herein, we provide guidance on tailoring PEG hydrogel chemistry to achieve target hydrolytic degradation kinetics for both resorbable and biostable applications. A detailed overview of accelerated testing methods and hydrogel degradation characterization is provided to aid researchers in experimental design and interpreting in vitro-in vivo correlations necessary for predicting hydrogel device performance.
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Affiliation(s)
| | - Mykel Green
- Department of Biomedical Engineering, The University of Texas, Austin, Texas, USA
| | - Vani Shah
- Department of Biomedical Engineering, The University of Texas, Austin, Texas, USA
| | - Kathleen Leyendecker
- Department of Mechanical Engineering, The University of Texas, Austin, Texas, USA
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2
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Shi X, Si W, Zhu J, Zhang S. Boosting the Electrical Performance of PLA-Based Triboelectric Nanogenerators for Sustainable Power Sources and Self-Powered Sensing. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2307620. [PMID: 38009487 DOI: 10.1002/smll.202307620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/31/2023] [Indexed: 11/29/2023]
Abstract
Triboelectric nanogenerators (TENGs) have emerged as a promising technology for harvesting mechanical energy from the ambient environment. However, developing tribopositive materials with strong piezoelectric effects and high electron-donating ability still remains a challenge. Herein, poly(ethylene glycol) monomethyl ether (mPEG) to soft poly(lactic acid) (PLA) is adopted, then PLA/mPEG nanofibers are fabricated under electrospinning and used as the tribopositive material for fabricating robust power density TENGs. The crystallinity and dynamic mechanical properties of PLA/mPEG nanofibers are investigated. The results revealed that the incorporation of mPEG provided an effective approach to elevate the electron-donating ability and charge transfer efficiency in PLA. The PLA/mPEG-based TENGs achieved a high open-circuit voltage of 342.8 V, a short-circuit current of 38.5 µA, and a maximum power density of 116.21 W m-2 over a 2 cm2 contact area at an external load of 106 Ω, respectively. Strikingly, excellent stability and durability are demonstrated after continuous cycles up to 104 cycles. Noteworthy, the TENGs are explored for self-powered sensing applications, with seven TENG units integrated to act as self-powered sensors playing music through buzzers when pressed by fingers. Eventually, this work provides new insights into tuning the structures and properties of electrospun polymers to reinforce the TENG output and self-powered systems.
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Affiliation(s)
- Xingxing Shi
- The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, 518033, China
- Institute of Emergent Elastomers, South China University of Technology, Guangzhou, Guangdong, 510640, China
| | - Wanjie Si
- Institute of Emergent Elastomers, South China University of Technology, Guangzhou, Guangdong, 510640, China
| | - Jingyi Zhu
- Institute of Emergent Elastomers, South China University of Technology, Guangzhou, Guangdong, 510640, China
| | - Shuidong Zhang
- Institute of Emergent Elastomers, South China University of Technology, Guangzhou, Guangdong, 510640, China
- Guangdong Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing, South China University of Technology, Guangzhou, 510640, China
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3
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A novel superparamagnetic iron oxide nanoparticles-based SPECT/MRI dual-modality probe for tumor imaging. J Radioanal Nucl Chem 2023. [DOI: 10.1007/s10967-022-08741-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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4
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Qu W, Wang Z, Wang X, Wang Z, Yu D, Ji D. High-hydrophobic ZIF-67@PLA Honeycomb Aerogel for Efficient Oil–Water Separation. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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5
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Cakir Hatir P. Light‐induced
hydrogels derived from poly(ethylene glycol) and acrylated methyl ricinoleate as biomaterials. J Appl Polym Sci 2022. [DOI: 10.1002/app.52754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Pinar Cakir Hatir
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences Istinye University Istanbul Turkey
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6
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Li Y, Lin Z, Wang X, Duan Z, Lu P, Li S, Ji D, Wang Z, Li G, Yu D, Liu W. High-hydrophobic ZIF-8@PLA composite aerogel and application for oil-water separation. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118794] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Chi HY, Chan V, Li C, Hsieh JH, Lin PH, Tsai YH, Chen Y. Fabrication of polylactic acid/paclitaxel nano fibers by electrospinning for cancer therapeutics. BMC Chem 2020; 14:63. [PMID: 33111062 PMCID: PMC7585315 DOI: 10.1186/s13065-020-00711-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 09/17/2020] [Indexed: 12/19/2022] Open
Abstract
Polylactic acid (PLA) is a thermoplastic and biodegradable polyester, largely derived from renewable resources such as corn starch, cassava starch and sugarcane. However, PLA is only soluble in a narrow range of solvents such as tetrahydrofuran, dioxane, chlorinated solvents and heated benzene. The limited choices of solvent for PLA dissolution have imposed significant challenges in the development of specifically engineered PLA nanofibers with electrospinning techniques. Generally, the electrospun polymeric materials have been rendered with unique properties such as high porosity and complex geometry while maintaining its biodegradability and biocompatibility for emerging biomedical applications. In this study, a new anticancer drug delivery system composed of PLA nanofibers with encapsulated paclitaxel was developed by the electrospinning of the respective nanofibers on top of a spin-coated thin film with the same chemical compositions. Our unique approach is meant for promoting strong bonding between PLA-based nanofibers and their respective films in order to improve the prolonged release properties and composite film stability within a fluctuative physiochemical environment during cell culture. PLA/paclitaxel nanofiber supported on respective polymeric films were probed by scanning electronic microscope, Fourier transform infrared spectrometer and water contact measurement for determining their surface morphologies, fibers’ diameters, molecular vibrational modes, and wettability, respectively. Moreover, PLA/paclitaxel nanofibers supported on respective spin-coated films at different loadings of paclitaxel were evaluated for their abilities in killing human colorectal carcinoma cells (HCT-116). More importantly, MTT assays showed that regardless of the concentrations of paclitaxel, the growth of HCT-116 was effectively inhibited by the prolonged release of paclitaxel from PLA/paclitaxel nanofibers. An effective prolonged delivery system of paclitaxel based on PLA nanofiber-based film has demonstrated exciting potentials for emerging applications as implantable drug delivery patch in post-surgical cancer eradication.
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Affiliation(s)
- H Y Chi
- Division of Cardiovascular Surgery, Department of Surgery, Taoyuan Armed Forces General Hospital, Taoyuan, 32551 Taiwan.,Department of Biomedical Engineering, National Yang Ming University, Taipei, 11221 Taiwan
| | - Vincent Chan
- Department of Biomedical Engineering, Khalifa University, PO Box 127788, Abu Dhabi, United Arab Emirates
| | - Chuan Li
- Department of Biomedical Engineering, National Yang Ming University, Taipei, 11221 Taiwan
| | - J H Hsieh
- Department of Materials Engineering, Ming Chi University of Technology, Taishan, New Taipei City, 24301 Taiwan
| | - P H Lin
- Department of Biomedical Engineering, National Yang Ming University, Taipei, 11221 Taiwan
| | - Ya-Hui Tsai
- Department of Surgery, Far Eastern Memorial Hospital, Banqiao, New Taipei City, 22060 Taiwan
| | - Yun Chen
- Department of Surgery, Far Eastern Memorial Hospital, Banqiao, New Taipei City, 22060 Taiwan
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8
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Fractionated crystallization and fractionated melting behaviors of poly(ethylene glycol) induced by poly(lactide) stereocomplex in their block copolymers and blends. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122189] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Leyva-Verduzco AA, Castillo-Ortega MM, Chan-Chan LH, Silva-Campa E, Galaz-Méndez R, Vera-Graziano R, Encinas-Encinas JC, Del Castillo-Castro T, Rodríguez-Félix DE, Santacruz-Ortega HDC, Santos-Sauceda I. Electrospun tubes based on PLA, gelatin and genipin in different arrangements for blood vessel tissue engineering. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-03057-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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10
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Agüero A, Morcillo MDC, Quiles-Carrillo L, Balart R, Boronat T, Lascano D, Torres-Giner S, Fenollar O. Study of the Influence of the Reprocessing Cycles on the Final Properties of Polylactide Pieces Obtained by Injection Molding. Polymers (Basel) 2019; 11:polym11121908. [PMID: 31756897 PMCID: PMC6960523 DOI: 10.3390/polym11121908] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/14/2019] [Accepted: 11/18/2019] [Indexed: 01/21/2023] Open
Abstract
This research work aims to study the influence of the reprocessing cycles on the mechanical, thermal, and thermomechanical properties of polylactide (PLA). To this end, PLA was subjected to as many as six extrusion cycles and the resultant pellets were shaped into pieces by injection molding. Mechanical characterization revealed that the PLA pieces presented relatively similar properties up to the third reprocessing cycle, whereas further cycles induced an intense reduction in ductility and toughness. The effect of the reprocessing cycles was also studied by the changes in the melt fluidity, which showed a significant increase after four reprocessing cycles. An increase in the bio-polyester chain mobility was also attained with the number of the reprocessing cycles that subsequently favored an increase in crystallinity of PLA. A visual inspection indicated that PLA developed certain yellowing and the pieces also became less transparent with the increasing number of reprocessing cycles. Therefore, the obtained results showed that PLA suffers a slight degradation after one or two reprocessing cycles whereas performance impairment becomes more evident above the fourth reprocessing cycle. This finding suggests that the mechanical recycling of PLA for up to three cycles of extrusion and subsequent injection molding is technically feasible.
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Affiliation(s)
- Angel Agüero
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (A.A.); (M.d.C.M.); (L.Q.-C.); (R.B.); (T.B.); (O.F.)
| | - Maria del Carmen Morcillo
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (A.A.); (M.d.C.M.); (L.Q.-C.); (R.B.); (T.B.); (O.F.)
| | - Luis Quiles-Carrillo
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (A.A.); (M.d.C.M.); (L.Q.-C.); (R.B.); (T.B.); (O.F.)
| | - Rafael Balart
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (A.A.); (M.d.C.M.); (L.Q.-C.); (R.B.); (T.B.); (O.F.)
| | - Teodomiro Boronat
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (A.A.); (M.d.C.M.); (L.Q.-C.); (R.B.); (T.B.); (O.F.)
| | - Diego Lascano
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (A.A.); (M.d.C.M.); (L.Q.-C.); (R.B.); (T.B.); (O.F.)
- Escuela Politécnica Nacional, Quito 17-01-2759, Ecuador
- Correspondence: ; Tel.: +34-966-528-433
| | - Sergio Torres-Giner
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish National Research Council (CSIC), Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Spain;
| | - Octavio Fenollar
- Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain; (A.A.); (M.d.C.M.); (L.Q.-C.); (R.B.); (T.B.); (O.F.)
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11
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Ranjbar M, Dehghan Noudeh G, Hashemipour MA, Mohamadzadeh I. A systematic study and effect of PLA/Al 2O 3 nanoscaffolds as dental resins: mechanochemical properties. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:201-209. [PMID: 30663399 DOI: 10.1080/21691401.2018.1548472] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
One of the major and important challenges in dental composite resin and restoration is the mechanical performance and property of materials. Nanotechnology can produce nanoscale materials that are used in dentistry to help stabilize and strengthen the dentistry. In this work, we study the synthesis and characterization of PLA/Al2O3 nanoscaffold in different conditions such as concentration, temperature, pH, microwave power and irradiation time. PLA/Al2O3 nanoscaffolds were prepared by a micelle-assisted hydrothermal method. Durability, stability and biodegradable nature of nanopolymers have created the much-applied potential for using this structures in many fields such as dental resin composites. Products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transition electron microscopy (TEM), Fourier transformed infrared spectrum (FT-IR), Dynamic light scattering (DLS) and atomic force microscopy (AFM). The synthesis factors were designed by Taguchi technique to control the process systematically. It was found that the intermolecular crosslinks between PLA and Al2O3 nanoparticles cause significant improves in the mechanical properties of PLA/Al2O3 nanoscaffold as dental nanocomposites. The flexural strength (88.0 MPa), modulus (7.5 GPa) and compressive strength (157.2 MPa) were calculated for PLA/Al2O3 nanoscaffolds loaded in Heliomolar Flow composite resins at 80 ppm (wt) concentration.
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Affiliation(s)
- Mehdi Ranjbar
- a Pharmaceutics Research Center , Institute of Neuropharmacology, Kerman University of Medical Sciences , Kerman , Iran
| | - Gholamreza Dehghan Noudeh
- a Pharmaceutics Research Center , Institute of Neuropharmacology, Kerman University of Medical Sciences , Kerman , Iran
| | - Maryam-Alsadat Hashemipour
- b Department of Oral Medicine , School of Dentistry, Kerman University of Medical Sciences , Kerman , Iran
| | - Iman Mohamadzadeh
- c Oral and Dental Disease Research Center , Kerman University of Medical Sciences , Kerman , Iran
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12
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Thomas G, Boudon J, Maurizi L, Moreau M, Walker P, Severin I, Oudot A, Goze C, Poty S, Vrigneaud JM, Demoisson F, Denat F, Brunotte F, Millot N. Innovative Magnetic Nanoparticles for PET/MRI Bimodal Imaging. ACS OMEGA 2019; 4:2637-2648. [PMID: 31459499 PMCID: PMC6648431 DOI: 10.1021/acsomega.8b03283] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Accepted: 01/14/2019] [Indexed: 05/21/2023]
Abstract
Superparamagnetic iron oxide nanoparticles were developed as positron emission tomography (PET) and magnetic resonance imaging (MRI) bimodal imaging agents. These nanoparticles (NPs), with a specific nanoflower morphology, were first synthesized and simultaneously functionalized with 3,4-dihydroxy-l-phenylalanine (LDOPA) under continuous hydrothermal conditions. The resulting NPs exhibited a low hydrodynamic size of 90 ± 2 nm. The functional groups of LDOPA (-NH2 and -COOH) were successfully used for the grafting of molecules of interest in a second step. The nanostructures were modified by poly(ethylene glycol) (PEG) and a new macrocyclic chelator MANOTA for further 64Cu radiolabeling for PET imaging. The functionalized NPs showed promising bimodal (PET and MRI) imaging capability with high r 2 and r 2* (T 2 and T 2* relaxivities) values and good stability. They were mainly uptaken from liver and kidneys. No cytotoxicity effect was observed. These NPs appear as a good candidate for bimodal tracers in PET/MRI.
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Affiliation(s)
- Guillaume Thomas
- ICB
UMR 6303 CNRS-Université Bourgogne Franche-Comté, 21000 Dijon, France
| | - Julien Boudon
- ICB
UMR 6303 CNRS-Université Bourgogne Franche-Comté, 21000 Dijon, France
| | - Lionel Maurizi
- ICB
UMR 6303 CNRS-Université Bourgogne Franche-Comté, 21000 Dijon, France
| | - Mathieu Moreau
- ICMUB
UMR 6302 CNRS-Université Bourgogne Franche-Comté, 21000 Dijon, France
| | - Paul Walker
- Département
de Spectroscopie par Résonance Magnétique, CHU Dijon, 21000 Dijon, France
| | - Isabelle Severin
- UBFC-AgrosupDijon-INSERM
U 1231, 1 Esplanade Erasme, 21000 Dijon, France
| | - Alexandra Oudot
- Plateforme
d’Imagerie Préclinique, Service de Médecine Nucléaire, Centre Georges François Leclerc, 21000 Dijon, France
| | - Christine Goze
- ICMUB
UMR 6302 CNRS-Université Bourgogne Franche-Comté, 21000 Dijon, France
| | - Sophie Poty
- ICMUB
UMR 6302 CNRS-Université Bourgogne Franche-Comté, 21000 Dijon, France
| | - Jean-Marc Vrigneaud
- Plateforme
d’Imagerie Préclinique, Service de Médecine Nucléaire, Centre Georges François Leclerc, 21000 Dijon, France
| | - Fréderic Demoisson
- ICB
UMR 6303 CNRS-Université Bourgogne Franche-Comté, 21000 Dijon, France
| | - Franck Denat
- ICMUB
UMR 6302 CNRS-Université Bourgogne Franche-Comté, 21000 Dijon, France
| | - François Brunotte
- Plateforme
d’Imagerie Préclinique, Service de Médecine Nucléaire, Centre Georges François Leclerc, 21000 Dijon, France
| | - Nadine Millot
- ICB
UMR 6303 CNRS-Université Bourgogne Franche-Comté, 21000 Dijon, France
- E-mail:
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Tang P, di Cio S, Wang W, E Gautrot J. Surface-Initiated Poly(oligo(2-alkyl-2-oxazoline)methacrylate) Brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:10019-10027. [PMID: 30032621 DOI: 10.1021/acs.langmuir.8b01682] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Polymer brushes are particularly performant antifouling coatings, owing to their high grafting density that prevents unwanted biomacromolecules to diffuse through the coating and adhere to the underlying substrate. In addition to this structural feature, polymer brushes require a relatively high level of hydrophilicity and a globally neutral structure to display ultrahigh protein resistance. Poly(2-alkyl-2-oxaolines) are attractive building blocks for such coatings as they can display relatively high hydrophilicity, owing to their amide repeat units, but can also be side-chain and end-chain functionalized relatively readily. However, poly(2-alkyl-2-oxazolines) have not yet been introduced through a radical-mediated grafting from polymer brush structure that would confer the high level of grafting density that is the hallmark of highly protein resistant brushes. Here, we present the formation of a series of poly(oligo(2-alkyl-2-oxazoline)methacrylate) brushes generated via a grafting from approach, via atom transfer radical polymerization. We characterize the chemical structure of the resulting coatings via ellipsometry, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy. We show that allyl end groups can be introduced as a side chain of these brushes to allow functionalization via thiol-ene chemistry. We demonstrate the excellent protein resistance of these coatings in single protein solutions as well as serum solutions at concentration typically used for cell culture. Finally, we demonstrate the feasibility of using these brushes for the micropatterning of cells and the generation of cell-based assays.
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Xu W, Pranovich A, Uppstu P, Wang X, Kronlund D, Hemming J, Öblom H, Moritz N, Preis M, Sandler N, Willför S, Xu C. Novel biorenewable composite of wood polysaccharide and polylactic acid for three dimensional printing. Carbohydr Polym 2018; 187:51-58. [PMID: 29486844 DOI: 10.1016/j.carbpol.2018.01.069] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 01/02/2018] [Accepted: 01/20/2018] [Indexed: 01/08/2023]
Abstract
Hemicelluloses, the second most abundant polysaccharide right after cellulose, are in practice still treated as a side-stream in biomass processing industries. In the present study, we report an approach to use a wood-derived and side-stream biopolymer, spruce wood hemicellulose (galactoglucomannan, GGM) to partially replace the synthetic PLA as feedstock material in 3D printing. A solvent blending approach was developed to ensure the even distribution of the formed binary biocomposites. The blends of hemicellulose and PLA with varied ratio up to 25% of hemicellulose were extruded into filaments by hot melt extrusion. 3D scaffold prototypes were successfully printed from the composite filaments by fused deposition modeling 3D printing. Combining with 3D printing technique, the biocompatible and biodegradable feature of spruce wood hemicellulose into the composite scaffolds would potentially boost this new composite material in various biomedical applications such as tissue engineering and drug-eluting scaffolds.
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Affiliation(s)
- Wenyang Xu
- Johan Gadolin Process Chemistry Centre, c/o Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Turku FI-20500, Finland
| | - Andrey Pranovich
- Johan Gadolin Process Chemistry Centre, c/o Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Turku FI-20500, Finland
| | - Peter Uppstu
- Laboratory of Polymer Technology, Åbo Akademi University, Turku FI-20500, Finland
| | - Xiaoju Wang
- Johan Gadolin Process Chemistry Centre, c/o Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Turku FI-20500, Finland
| | - Dennis Kronlund
- Laboratory of Physical Chemistry, Åbo Akademi University, Turku FI-20500, Finland
| | - Jarl Hemming
- Johan Gadolin Process Chemistry Centre, c/o Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Turku FI-20500, Finland
| | - Heidi Öblom
- Laboratory of Pharmaceutical Sciences, Åbo Akademi University, Turku FI-20500, Finland
| | - Niko Moritz
- Turku Clinical Biomaterial Centre - TCBC, Department of Biomaterials Science, Institute of Dentistry, University of Turku, Itäinen Pitkäkatu 4B (PharmaCity), FI-20520 Turku, Finland; Biomedical Engineering Research Group, Turku Biomaterials Research Program, Itäinen Pitkäkatu 4B (PharmaCity), FI-20520 Turku, Finland
| | - Maren Preis
- Laboratory of Pharmaceutical Sciences, Åbo Akademi University, Turku FI-20500, Finland
| | - Niklas Sandler
- Laboratory of Pharmaceutical Sciences, Åbo Akademi University, Turku FI-20500, Finland
| | - Stefan Willför
- Johan Gadolin Process Chemistry Centre, c/o Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Turku FI-20500, Finland
| | - Chunlin Xu
- Johan Gadolin Process Chemistry Centre, c/o Laboratory of Wood and Paper Chemistry, Åbo Akademi University, Turku FI-20500, Finland.
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15
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Thomas G, Demoisson F, Boudon J, Millot N. Efficient functionalization of magnetite nanoparticles with phosphonate using a one-step continuous hydrothermal process. Dalton Trans 2018; 45:10821-9. [PMID: 27295502 DOI: 10.1039/c6dt01050d] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
For the first time, phosphonate-functionalized magnetite nanoparticles (Fe3O4 NPs) were synthesized using a one-step continuous hydrothermal process. The NP surface was modified using a hydrophilic organic molecule, namely 6-phosphonohexanoic acid (PHA). NPs were fully characterized (TEM, XRD, DLS, ζ-potential, TGA, FTIR, XPS and specific surface area measurements) in order to investigate PHA effect on size, oxidation state, anchoring and colloidal stability. PHA reduced the crystallite size and size distribution and improved greatly colloidal stability when compared with bare Fe3O4 NPs. Moreover, PHA was grafted on the NP surface according to three different conformations: as mononuclear monodendates, as binuclear bidentates or as lying-down complexes. This report is very promising regarding the stabilization and functionalization of Fe3O4 NPs by phosphonate molecules under continuous hydrothermal conditions. The post-grafting of polymers such as polyethylene glycol can be considered owing to the presence of free carboxyl groups (-COOH) on the surface of Fe3O4 NPs.
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Affiliation(s)
- Guillaume Thomas
- Laboratoire Interdisciplinaire Carnot de Bourgogne UMR 6303 CNRS-Université Bourgogne Franche-Comté, 9 Av. A. Savary, BP 47870 F-21078 DIJON Cedex, France.
| | - Frédéric Demoisson
- Laboratoire Interdisciplinaire Carnot de Bourgogne UMR 6303 CNRS-Université Bourgogne Franche-Comté, 9 Av. A. Savary, BP 47870 F-21078 DIJON Cedex, France.
| | - Julien Boudon
- Laboratoire Interdisciplinaire Carnot de Bourgogne UMR 6303 CNRS-Université Bourgogne Franche-Comté, 9 Av. A. Savary, BP 47870 F-21078 DIJON Cedex, France.
| | - Nadine Millot
- Laboratoire Interdisciplinaire Carnot de Bourgogne UMR 6303 CNRS-Université Bourgogne Franche-Comté, 9 Av. A. Savary, BP 47870 F-21078 DIJON Cedex, France.
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Chevalier MT, García MC, Gonzalez D, Gomes-Filho SM, Bassères DS, Farina H, Alvarez VA. Preparation, characterization and in vitro evaluation of ε-polylysine-loaded polymer blend microparticles for potential pancreatic cancer therapy. J Microencapsul 2017; 34:582-591. [DOI: 10.1080/02652048.2017.1370028] [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]
Affiliation(s)
- Merari T. Chevalier
- Grupo de Materiales Compuestos de Matriz Termoplástica, Instituto de Investigaciones de Ciencia y Tecnología de Matriales (INTEMA), Universidad Nacional de Mar del Plata, Colón, Mar del Plata, Argentina
| | - Mónica C. García
- Unidad de Investigación y Desarrollo en Tecnología Farmacéutica (UNITEFA), CONICET and Departamento de Farmacia. Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, Argentina
| | - Daniela Gonzalez
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Sandro M. Gomes-Filho
- Department of Biochemistry, Chemistry Institute, University of São Paulo, São Paulo, Brazil
| | - Daniela S. Bassères
- Department of Biochemistry, Chemistry Institute, University of São Paulo, São Paulo, Brazil
| | - Hernan Farina
- Laboratory of Molecular Oncology, National University of Quilmes, Quilmes, Argentina
| | - Vera A. Alvarez
- Grupo de Materiales Compuestos de Matriz Termoplástica, Instituto de Investigaciones de Ciencia y Tecnología de Matriales (INTEMA), Universidad Nacional de Mar del Plata, Colón, Mar del Plata, Argentina
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17
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Kumari P, Muddineti OS, Rompicharla SVK, Ghanta P, B B N AK, Ghosh B, Biswas S. Cholesterol-conjugated poly(D, L-lactide)-based micelles as a nanocarrier system for effective delivery of curcumin in cancer therapy. Drug Deliv 2017; 24:209-223. [PMID: 28156164 PMCID: PMC8253141 DOI: 10.1080/10717544.2016.1245365] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Polymeric micelles have been widely explored preclinically as suitable delivery systems for poorly soluble chemotherapeutic drugs in cancer therapy. The present study reported the development of cholesterol (Ch)-conjugated poly(D,L-Lactide) (PLA)-based polymeric micelles (mPEG–PLA-Ch) for effective encapsulation and delivery of curcumin (CUR) at the tumor site. Cholesterol conjugation dramatically affected the particle size and improved drug loading (DL) and encapsulation efficiency (EE). mPEG–PLA-Ch-CUR showed bigger hydrodynamic diameter (104.6 ± 2.1 nm, and 169.3 ± 1.52 nm for mPEG–PLA and mPEG–PLA-Ch, respectively) due to increased size of the hydrophobic core. The newly developed polymer exhibited low critical micelles concentration (CMC) (25 μg/mL) which is close to lipid-based polymer, PEG-phosphatidyl ethanolamine (12.5 μg/mL) compared to mPEG–PLA (50 μg/mL). mPEG–PLA-Ch micelles exhibited relatively higher EE (93.74 ± 1.6%) and DL (11.86 ± 0.8%) compared to mPEG–PLA micelles (EE 91.89 ± 1.2% and DL 11.06 ± 0.8%). mPEG–PLA-Ch micelles were internalized by the cancer cells effectively and exhibited higher cytotoxicity compared to free CUR in both, murine melanoma (B16F10) and human breast cancer (MDA-MB-231) cells. mPEG–PLA-Ch exhibited satisfactory hemocompatibility indicating their potential for systemic application. Further, mPEG–PLA-Ch-CUR demonstrated higher rate of reduction of tumor volume in B16F10-xenografted tumor-bearing mice compared to free CUR. At the end of 22 days, the tumor reduced to 1.87-fold (627.72 ± 0.9 mm3 versus 1174.68 ± 1.64 mm3) compared to the treatment with free CUR. In conclusion, the experimental data in vitro and in vivo indicated that the newly developed CUR-mPEG–PLA-Ch micelles may have promising applications in solid tumors.
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Affiliation(s)
- Preeti Kumari
- a Department of Pharmacy , Birla Institute of Technology and Science , Pilani , Hyderabad , India
| | - Omkara Swami Muddineti
- a Department of Pharmacy , Birla Institute of Technology and Science , Pilani , Hyderabad , India
| | | | - Pratyusha Ghanta
- a Department of Pharmacy , Birla Institute of Technology and Science , Pilani , Hyderabad , India
| | - Adithya Karthik B B N
- a Department of Pharmacy , Birla Institute of Technology and Science , Pilani , Hyderabad , India
| | - Balaram Ghosh
- a Department of Pharmacy , Birla Institute of Technology and Science , Pilani , Hyderabad , India
| | - Swati Biswas
- a Department of Pharmacy , Birla Institute of Technology and Science , Pilani , Hyderabad , India
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18
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Versatile synthesis of comb-shaped poly(lactic acid) copolymers with poly(acrylic acid)-based backbones and carboxylic acid end groups. REACT FUNCT POLYM 2017. [DOI: 10.1016/j.reactfunctpolym.2016.12.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Pavelková A, Kucharczyk P, Kuceková Z, Zedník J, Sedlařík V. Non-toxic polyester urethanes based on poly(lactic acid), poly(ethylene glycol) and lysine diisocyanate. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911516672239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Poly(lactic acid)-based polymers are highly suitable for temporary biomedical applications, such as tissue support or drug delivery systems. Copolymers of different molecular weight based on poly(lactic acid) and poly(ethylene glycol) were prepared by polycondensation, catalysed by hydrochloric acid. A chain-extension reaction with l-lysine ethyl ester diisocyanate was employed afterwards to obtain polyester urethanes with enhanced properties. The GPC results showed that the molecular weights of the products reached about 50,000 g·mol−1 and the hydrolytic progress was rapid in the first 2 weeks; the drop in Mn equalled approximately 70%. Additionally, elemental analysis of the buffer medium proved that hydrolytic degradation was more rapid in the first stage. Tensile-strength testing revealed that ductility increased alongside reduced molecular weight of poly(ethylene glycol), also suggesting that polymer branching occurred due to side reactions of isocyanate. Based on the envisaged biomedical applications for these polymers, cytotoxicity tests were carried out and the cytotoxic effect was only moderate in the case of 100% polymer extract prepared according to ISO standard 10993-12. In their research, the authors focused on preparing metal-free, catalysed synthesis of polyester urethanes, which could prove useful to numerous biomedical applications.
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Affiliation(s)
- Alena Pavelková
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Zlín, Czech Republic
| | - Pavel Kucharczyk
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Zlín, Czech Republic
| | - Zdenka Kuceková
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Zlín, Czech Republic
| | - Jiří Zedník
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Prague, Czech Republic
| | - Vladimír Sedlařík
- Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Zlín, Czech Republic
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20
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Barletta M, Moretti P, Pizzi E, Puopolo M, Tagliaferri V, Vesco S. Engineering of Poly Lactic Acids (PLAs) for melt processing: Material structure and thermal properties. J Appl Polym Sci 2016. [DOI: 10.1002/app.44504] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- M. Barletta
- Dipartimento di Ingegneria dell'Impresa; , Università degli Studi di Roma Tor Vergata; Via del Politecnico 1 Rome 00133 Italy
| | - P. Moretti
- Dipartimento di Ingegneria dell'Impresa; , Università degli Studi di Roma Tor Vergata; Via del Politecnico 1 Rome 00133 Italy
| | - E. Pizzi
- Dipartimento di Ingegneria dell'Impresa; , Università degli Studi di Roma Tor Vergata; Via del Politecnico 1 Rome 00133 Italy
| | - M. Puopolo
- Dipartimento di Ingegneria dell'Impresa; , Università degli Studi di Roma Tor Vergata; Via del Politecnico 1 Rome 00133 Italy
| | - V. Tagliaferri
- Dipartimento di Ingegneria dell'Impresa; , Università degli Studi di Roma Tor Vergata; Via del Politecnico 1 Rome 00133 Italy
| | - S. Vesco
- Dipartimento di Ingegneria dell'Impresa; , Università degli Studi di Roma Tor Vergata; Via del Politecnico 1 Rome 00133 Italy
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21
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Montini-Ballarin F, Caracciolo PC, Rivero G, Abraham GA. In vitro degradation of electrospun poly(l-lactic acid)/segmented poly(ester urethane) blends. Polym Degrad Stab 2016. [DOI: 10.1016/j.polymdegradstab.2016.02.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Davachi SM, Kaffashi B, Zamanian A, Torabinejad B, Ziaeirad Z. Investigating composite systems based on poly l -lactide and poly l -lactide/triclosan nanoparticles for tissue engineering and medical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:294-309. [DOI: 10.1016/j.msec.2015.08.026] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 07/15/2015] [Accepted: 08/18/2015] [Indexed: 11/17/2022]
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23
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Nagiah N, Johnson R, Anderson R, Elliott W, Tan W. Highly Compliant Vascular Grafts with Gelatin-Sheathed Coaxially Structured Nanofibers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:12993-3002. [PMID: 26529143 PMCID: PMC4866605 DOI: 10.1021/acs.langmuir.5b03177] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We have developed three types of materials composed of polyurethane-gelatin, polycaprolactone-gelatin, or polylactic acid-gelatin nanofibers by coaxially electrospinning the hydrophobic core and gelatin sheath with a ratio of 1:5 at fixed concentrations. Results from attenuated total reflection-Fourier transformed infrared spectroscopy demonstrated the gelatin coating around nanofibers in all of the materials. Transmission electron microscopy images further displayed the core-sheath structures showing the core-to-sheath thickness ratio varied greatly with the highest ratio found in polyurethane-gelatin nanofibers. Scanning electron microscopy images revealed similar, uniform fibrous structures in all of the materials, which changed with genipin cross-linking due to interfiber interactions. Thermal analyses revealed varied interactions between the hydrophilic sheath and hydrophobic core among the three materials, which likely caused different core-sheath structures, and thus physicomechanical properties. The addition of gelatin around the hydrophobic polymer and their interactions led to the formation of graft scaffolds with tissue-like viscoelasticity, high compliance, excellent swelling capability, and absence of water permeability while maintaining competent tensile modulus, burst pressure, and suture retention. The hydrogel-like characteristics are advantageous for vascular grafting use, because of the capability of bypassing preclotting prior to implantation, retaining vascular fluid volume, and facilitating molecular transport across the graft wall, as shown by coculturing vascular cells sandwiched over a thick-wall scaffold. Varied core-sheath interactions within scaffolding nanofibers led to differences in graft functional properties such as water swelling ratio, compliance, and supporting growth of cocultured vascular cells. The PCL-gelatin scaffold with thick gelatin-sheathed nanofibers demonstrated a more compliant structure, elastic mechanics, and high water swelling property. Our results demonstrate a feasible approach to produce new hybrid, biodegradable nanofibrous scaffold biomaterials with interactive core-sheath structure, good biocompatibility, and tissue-like viscoelasticity, which may reduce potential problems with the use of individual polymers for vascular grafts.
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Affiliation(s)
- Naveen Nagiah
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | - Richard Johnson
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | - Roy Anderson
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | - Winston Elliott
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
| | - Wei Tan
- Department of Mechanical Engineering, University of Colorado at Boulder, Boulder, Colorado 80309, United States
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24
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Tawakkal ISMA, Cran MJ, Bigger SW. Interaction and quantification of thymol in active PLA-based materials containing natural fibers. J Appl Polym Sci 2015. [DOI: 10.1002/app.42160] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | - Marlene J. Cran
- Institute for Sustainability and Innovation; Victoria University; Melbourne 8001 Australia
| | - Stephen W. Bigger
- College of Engineering and Science, Victoria University; Melbourne 8001 Australia
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25
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Chen Y, Mo F, Chen S, Yang Y, Chen S, Zhuo H, Liu J. A shape memory copolymer based on 2-(dimethylamino)ethyl methacrylate and methyl allyl polyethenoxy ether for potential biological applications. RSC Adv 2015. [DOI: 10.1039/c5ra05753a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
This study reports a novel shape memory copolymer synthesized with 2-(dimethylamino)-ethyl-methacrylate (DMAEMA) and methyl-allyl-polyethenoxy-ether (TPEG) for potential biological applications.
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Affiliation(s)
- Yangyang Chen
- Shenzhen Key Laboratory of Special Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- College of Materials Science and Engineering
- Shenzhen University
- Shenzhen
| | - Funian Mo
- Shenzhen Key Laboratory of Special Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- College of Materials Science and Engineering
- Shenzhen University
- Shenzhen
| | - Shaojun Chen
- Shenzhen Key Laboratory of Special Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- College of Materials Science and Engineering
- Shenzhen University
- Shenzhen
| | - Yan Yang
- Shenzhen Key Laboratory of Special Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- College of Materials Science and Engineering
- Shenzhen University
- Shenzhen
| | - Shiguo Chen
- Shenzhen Key Laboratory of Special Functional Materials
- Nanshan District Key Lab for Biopolymers and Safety Evaluation
- College of Materials Science and Engineering
- Shenzhen University
- Shenzhen
| | - Haitao Zhuo
- Shenzhen Key Laboratory of Functional Polymer
- College of Chemistry and Chemical Engineering
- Shenzhen University
- Shenzhen
- China
| | - Jianhong Liu
- Shenzhen Key Laboratory of Functional Polymer
- College of Chemistry and Chemical Engineering
- Shenzhen University
- Shenzhen
- China
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26
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Wang G, Maciel D, Wu Y, Rodrigues J, Shi X, Yuan Y, Liu C, Tomás H, Li Y. Amphiphilic polymer-mediated formation of laponite-based nanohybrids with robust stability and pH sensitivity for anticancer drug delivery. ACS APPLIED MATERIALS & INTERFACES 2014; 6:16687-95. [PMID: 25167168 DOI: 10.1021/am5032874] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The development of pH-sensitive drug delivery nanosystems that present a low drug release at the physiological pH and are able to increase the extent of the release at a lower pH value (like those existent in the interstitial space of solid tumors (pH 6.5) and in the intracellular endolysosomal compartments (pH 5.0)) is very important for an efficient and safe cancer therapy. Laponite (LP) is a synthetic silicate nanoparticle with a nanodisk structure (25 nm in diameter and 0.92 nm in thickness) and negative-charged surface, which can be used for the encapsulation of doxorubicin (DOX, a cationic drug) through electrostatic interactions and exhibit good pH sensitivity in drug delivery. However, the colloidal instability of LP still limits its potential clinical applications. In this study, we demonstrate an elegant strategy to develop stable Laponite-based nanohybrids through the functionalization of its surface with an amphiphile PEG-PLA copolymer by a self-assembly process. The hydrophobic block of PEG-PLA acts as an anchor that binds to the surface of drug-loaded LP nanodisks, maintaining the core structure, whereas the hydrophilic PEG part serves as a protective stealth shell that improves the whole stability of the nanohybrids under physiological conditions. The resulting nanocarriers can effectively load the DOX drug (the encapsulation efficiency is 85%), and display a pH-enhanced drug release behavior in a sustained way. In vitro biological evaluation indicated that the DOX-loaded nanocarriers can be effectively internalized by CAL-72 cells (an osteosarcoma cell line), and exhibit a remarkable higher anticancer cytotoxicity than free DOX. The merits of Laponite/PEG-PLA nanohybrids, such as good cytocompatibility, excellent physiological stability, sustained pH-responsive release properties, and improved anticancer activity, make them a promising platform for the delivery of other therapeutic agents beyond DOX.
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Affiliation(s)
- Guoying Wang
- CQM-Centro de Química da Madeira, MMRG, Universidade da Madeira , Campus Universitário da Penteada, 9020-105 Funchal, Portugal
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27
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Wang DK, Zhang X, Diniz da Costa JC. Claisen-type degradation mechanism of cellulose triacetate membranes in ethanol–water mixtures. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.12.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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28
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Wang DK, Varanasi S, Strounina E, Hill DJT, Symons AL, Whittaker AK, Rasoul F. Synthesis and characterization of a POSS-PEG macromonomer and POSS-PEG-PLA hydrogels for periodontal applications. Biomacromolecules 2014; 15:666-79. [PMID: 24410405 DOI: 10.1021/bm401728p] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A novel water-soluble macromonomer based on octavinyl silsesquioxane has been synthesized and contains vinyl-terminated PEG 400 in each of the eight arms to promote water solubility. The macromonomer was characterized by NMR and FTIR and its aqueous solution properties examined. In water it exhibits an LCST with a cloud point at 23 °C for a 10 wt % aqueous solution. It is surface active with a CMC of 1.5 × 10(-5) M in water and in 20:80 v/v acetone/water the CMC is 7.1 × 10(-5) M, and TEM images showed spherical 22 nm aggregates in aqueous solution above the CMC. The macromonomer was copolymerized in a 20:80 v/v acetone/water mixture with a vinyl-terminated, triblock copolymer of lactide-PEG-lactide to form a library of cross-linked hydrogels that were designed for use as scaffolds for alveolar bone repair. The cross-linked copolymer networks were shown to contain a range of nm-μm sized pores and their swelling properties in water and PBS at pH 7.4 were examined. At pH 7.4 the hydrogel networks undergo a slow hydrolysis with the release of principally PEG and lactic acid fragments. The hydrogels were shown to be noncytotoxic toward fibroblast cultures at pH 7.4, both initially (days 1-5) and after significant hydrolysis had taken place (days 23-28).
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Affiliation(s)
- David K Wang
- Australian Institute for Bioengineering and Nanotechnology, ‡Centre for Advanced Imaging, ∥School of Chemistry and Molecular Biochemistry, and §School of Dentistry, The University of Queensland , Brisbane Queensland 4072, Australia
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29
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Xia Y, Wang X, Wang Y, Wang Y. Full pH-range responsive hyperbranched polyethers: synthesis and responsiveness. Polym Chem 2014. [DOI: 10.1039/c4py00284a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to impart full pH-range responsiveness within biocompatible hyperbranched polyethers, new amphiphilic polyethers, i.e. HPMHO–Amines and HPMHO–Carboxys, which have a molecular structure similar to hyperbranched PEG, were prepared through ring-opening polymerization and modified by amination or carboxylation.
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Affiliation(s)
- Yumin Xia
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai, People's Republic of China
| | - Xinhang Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai, People's Republic of China
| | - Yanping Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai, People's Republic of China
| | - Yimin Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai, People's Republic of China
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