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Zhu C, Zhang Z, Wen Y, Song X, Zhu J, Yao Y, Li J. Cationic micelles as nanocarriers for enhancing intra-cartilage drug penetration and retention. J Mater Chem B 2023; 11:1670-1683. [PMID: 36621526 DOI: 10.1039/d2tb02050e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
There is a tremendous unmet medical need for osteoarthritis (OA) treatment around the world, and pharmacological management is the most common option but presents a limited and short efficacy. Insufficient drug delivery to articular cartilage is the key cause. It is widely accepted that the complex structure of articular cartilage and the rapid clearance of joint liquids largely hinder drug penetration and retention in the cartilage. To address these obstacles, we designed and prepared a positively charged micellar system that can effectively deliver a model drug to the deep zone of the cartilage and prolong the drug retention time. In this work, a triblock copolymer composed of cationic poly(N,N-dimethylaminoethyl methacrylate) (PDMAEMA) and poly(ε-caprolactone) (PCL), denoted as PDMAEMA-PCL-PDMAEMA, was synthesized. A triblock copolymer composed of brush poly[poly(ethylene glycol) methacrylate] (pPEGMA) and PCL, denoted as pPEGMA-PCL-pPEGMA, was prepared for comparison. The two types of triblock copolymers were self-assembled in an aqueous environment to form cationic and neutral micelles, respectively. A hydrophobic fluorescent dye as a model drug was loaded into micelle cores, and the dye-loaded micelles were evaluated for intra-cartilage penetration and retention using porcine knee cartilage explants. The PDMAEMA-PCL-PDMAEMA cationic micelles were found to significantly enhance the intra-cartilage penetration and retention capability due to the electrostatic interaction between the micelles and the negatively charged cartilage extracellular matrix. The confocal microscopy study showed that the cationic micelles could penetrate the full-thickness porcine cartilage explants (around 1.5 mm) within 24 hours. Up to 87% of the cationic micelles were taken up by porcine cartilage explants, and 71% of the absorbed micelles were retained in the tissue for at least 4 days. Although the pPEGMA-PCL-pPEGMA neutral micelles were able to penetrate the full-thickness cartilage, this type of micelle showed lower uptake (44%) and retention (44%) rates. This observation implied that the surface charge of micelles could play an important role in efficient intra-cartilage drug delivery. This study verified the feasibility and effectiveness of the PDMAEMA-PCL-PDMAEM cationic micelles in intra-cartilage drug delivery, showing that cationic micelles could be promising carriers for OA treatment.
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Affiliation(s)
- Chenxian Zhu
- Department of Biomedical Engineering, National University of Singapore, 15 Kent Ridge Crescent, Singapore 119276, Singapore.
| | - Zhongxing Zhang
- Department of Biomedical Engineering, National University of Singapore, 15 Kent Ridge Crescent, Singapore 119276, Singapore.
| | - Yuting Wen
- Department of Biomedical Engineering, National University of Singapore, 15 Kent Ridge Crescent, Singapore 119276, Singapore. .,National University of Singapore (Chongqing) Research Institute, 2 Huizhu Road, Yubei District, Chongqing 401120, China
| | - Xia Song
- Department of Biomedical Engineering, National University of Singapore, 15 Kent Ridge Crescent, Singapore 119276, Singapore.
| | - Jingling Zhu
- Department of Biomedical Engineering, National University of Singapore, 15 Kent Ridge Crescent, Singapore 119276, Singapore. .,NUS Environmental Research Institute (NERI), National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Yifei Yao
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China.
| | - Jun Li
- Department of Biomedical Engineering, National University of Singapore, 15 Kent Ridge Crescent, Singapore 119276, Singapore. .,National University of Singapore (Chongqing) Research Institute, 2 Huizhu Road, Yubei District, Chongqing 401120, China.,NUS Environmental Research Institute (NERI), National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
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Diaz IL, Jérôme V, Freitag R, Perez LD. Development of poly(ethyleneimine) grafted amphiphilic copolymers: Evaluation of their cytotoxicity and ability to complex DNA. J BIOACT COMPAT POL 2021. [DOI: 10.1177/08839115211053925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Poly(ethyleneimine) (PEI) is one of the most widely used cationic polymers for gene delivery. The high molecular weight polymer, which is commercially available, is highly efficient but also very cytotoxic. The reduction in charge density by using nonlinear architectures based on low molecular weight (LMW) PEI is a promising approach to produce safer DNA-vectors. Herein, a group of cationic graft copolymers with different composition containing a hydrophobic biocompatible backbone and LMW linear PEI (lPEI) grafts obtained by ring opening polymerization and click chemistry was studied. The self-assembly and DNA complexation behavior of these materials was analyzed by the gel retardation assay, zeta potential measurements, and dynamic light scattering. The copolymers formed positively charged particles in water with average sizes between 270 and 377 nm. After they were added to DNA in serum-free medium, these particles acquired negative/near-neutral charges and increased in size depending on the N/P ratio. All copolymers showed reduced cytotoxicity compared to the 25 kDa lPEI used as reference, but the transfection efficiency was reduced. This result suggested that the cationic segments were too small to fully condense the DNA and promote cellular uptake, even with the use of several grafts and the introduction of hydrophobic domains. The trends found in this research showed that a higher degree of hydrophobicity and a higher grafting density can enhance the interaction between the copolymers and DNA. These trends could direct further structural modifications in the search for effective and safe vectors based on this polycation.
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Affiliation(s)
- Ivonne L Diaz
- Departamento de Química, Universidad Nacional de Colombia, Bogotá DC, Colombia
| | - Valérie Jérôme
- Process Biotechnology, University of Bayreuth, Bayreuth, Germany
| | - Ruth Freitag
- Process Biotechnology, University of Bayreuth, Bayreuth, Germany
| | - León D Perez
- Departamento de Química, Universidad Nacional de Colombia, Bogotá DC, Colombia
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Arias ER, Angarita-Villamizar V, Baena Y, Parra-Giraldo C, Perez LD. Phospholipid-Conjugated PEG- b-PCL Copolymers as Precursors of Micellar Vehicles for Amphotericin B. Polymers (Basel) 2021; 13:polym13111747. [PMID: 34071785 PMCID: PMC8199447 DOI: 10.3390/polym13111747] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 11/29/2022] Open
Abstract
Amphotericin B (AmB) is a widely used antifungal that presents a broad action spectrum and few reports on the development of resistance. However, AmB is highly toxic, causing renal failure in a considerable number of treated patients. Although when AmB is transported via polymer micelles (PMs) as delivery vehicles its nephrotoxicity has been successfully attenuated, this type of nanoparticle has limitations, such as low encapsulation capacity and poor stability in aqueous media. In this research, the effect of modifying polyethyleglicol-block-poly(ε-caprolactone) (PEG-b-PCL) with 1,2-distearoyl-sn-glycero-3-phosphorylethanolamine (DSPE) on the performance of PMs as vehicles for AmB was studied. PEG-b-PCL with two different lengths of a PCL segment was prepared via ring opening polymerisation and modified with DSPE at a post-synthesis stage through amidation. Upon modification with DSPE, a copolymer was self-assembled, thereby producing particles with hydrodynamic diameters below 100 nm and a lower critical micelle concentration than that of the raw copolymers. Likewise, in the presence of DSPE, the loading capacity of AmB increased because of the formed intermolecular interactions, such as hydrogen bonds, which also caused a lower aggregation of this drug. The assessment of in vitro toxicity against red blood cells indicated that the toxicity of AmB decreased upon encapsulation; however, its antifungal action against clinical yeasts was maintained and enhanced, as indicated by a decrease in its minimum inhibitory concentration.
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Affiliation(s)
- Elsa R. Arias
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Bogotá, Carrera 45 N° 26-85, Bogotá 11001, Colombia; (E.R.A.); (V.A.-V.)
| | - Vivian Angarita-Villamizar
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Bogotá, Carrera 45 N° 26-85, Bogotá 11001, Colombia; (E.R.A.); (V.A.-V.)
| | - Yolima Baena
- Grupo de Investigación SILICOMOBA, Departamento de Farmacia, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Bogotá, Carrera 30 # 45-03, Bogotá 11001, Colombia
- Correspondence: (Y.B.); (C.P.-G.); (L.D.P.); Tel.: +57-1316-5000 (Y.B. & L.D.P.); +57-1320-8320 (C.P.-G.)
| | - Claudia Parra-Giraldo
- Unidad de Proteómica y Micosis Humanas, Grupo de Enfermedades Infecciosas, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá 110231, Colombia
- Correspondence: (Y.B.); (C.P.-G.); (L.D.P.); Tel.: +57-1316-5000 (Y.B. & L.D.P.); +57-1320-8320 (C.P.-G.)
| | - Leon D. Perez
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Bogotá, Carrera 45 N° 26-85, Bogotá 11001, Colombia; (E.R.A.); (V.A.-V.)
- Correspondence: (Y.B.); (C.P.-G.); (L.D.P.); Tel.: +57-1316-5000 (Y.B. & L.D.P.); +57-1320-8320 (C.P.-G.)
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Diaz Ariza IL, Jérôme V, Pérez Pérez LD, Freitag R. Amphiphilic Graft Copolymers Capable of Mixed-Mode Interaction as Alternative Nonviral Transfection Agents. ACS APPLIED BIO MATERIALS 2021; 4:1268-1282. [DOI: 10.1021/acsabm.0c01123] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ivonne L. Diaz Ariza
- Departamento de Química, Universidad Nacional de Colombia, Bogotá, D.C. 11001, Colombia
| | - Valérie Jérôme
- Process Biotechnology, University of Bayreuth, Bayreuth 95447, Germany
| | - León D. Pérez Pérez
- Departamento de Química, Universidad Nacional de Colombia, Bogotá, D.C. 11001, Colombia
| | - Ruth Freitag
- Process Biotechnology, University of Bayreuth, Bayreuth 95447, Germany
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Angarita-Villamizar AV, Arias ER, Diaz IL, Perez LD. Amphiphilic copolymers modified with oleic acid and cholesterol by combining ring opening polymerization and click chemistry with improved amphotericin B loading capacity. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-020-02392-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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6
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Diaz IL, Sierra CA, Jérôme V, Freitag R, Perez LD. Target grafting of poly(2‐(dimethylamino)ethyl methacrylate) to biodegradable block copolymers. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200204] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ivonne L. Diaz
- Department of ChemistryUniversidad Nacional de Colombia Bogotá D.C. Colombia
| | - Cesar A. Sierra
- Department of ChemistryUniversidad Nacional de Colombia Bogotá D.C. Colombia
| | - Valérie Jérôme
- Process BiotechnologyUniversity of Bayreuth Bayreuth Germany
| | - Ruth Freitag
- Process BiotechnologyUniversity of Bayreuth Bayreuth Germany
| | - León D. Perez
- Department of ChemistryUniversidad Nacional de Colombia Bogotá D.C. Colombia
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Rodriguez YJ, Quejada LF, Villamil JC, Baena Y, Parra-Giraldo CM, Perez LD. Development of Amphotericin B Micellar Formulations Based on Copolymers of Poly(ethylene glycol) and Poly(ε-caprolactone) Conjugated with Retinol. Pharmaceutics 2020; 12:E196. [PMID: 32106492 PMCID: PMC7150995 DOI: 10.3390/pharmaceutics12030196] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/21/2020] [Accepted: 01/22/2020] [Indexed: 12/02/2022] Open
Abstract
Amphotericin B (AmB) is a broad spectrum of antifungal drug used to treat antifungal diseases. However, due to the high toxicity of AmB, treated patients may suffer the risk of side effects, such as renal failure. Nanoencapsulation strategies have been reported to elicit low toxicity, albeit most of them possess low encapsulation efficiency. The aim of this research is to develop micellar delivery systems for AmB with reduced toxicity while maintaining its affectivity by employing retinol (RET)-conjugated amphiphilic block copolymers (ABCs) as precursors. Copolymers composed of poly(ε-caprolactone) (A) and polyethylenglycol (B) of types AB and ABA were synthesized by ring opening polymerization and subsequently conjugated with RET by Steglich esterification. 1H-NMR spectroscopy was used to corroborate the structure of copolymers and their conjugates and determine their molecular weights. Analysis by gel permeation chromatography also found that the materials have narrow distributions. The resulting copolymers were used as precursors for delivery systems of AmB, thus reducing its aggregation and consequently causing a low haemolytic effect. Upon conjugation with RET, the encapsulation capacity was enhanced from approximately 2 wt % for AB and ABA copolymers to 10 wt %. AmB encapsulated in polymer micelles presented improved antifungal efficiency against Candida albicans and Candida auris strains compared with Fungizone®, as deduced from the low minimum inhibitory concentration.
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Affiliation(s)
- Yeimy J. Rodriguez
- Grupo de Investigación en Macromoléculas, Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Bogotá, Carrera 45 No. 26-85, Edificio 451 of. 449, Bogotá D.C. 11001, Colombia;
| | - Luis F. Quejada
- Unidad de Proteómica y Micosis Humanas, Grupo de Enfermedades Infecciosas Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Carrera 7 No. 43-82, Bogotá D.C. 110231, Colombia; (L.F.Q.); (J.C.V.)
| | - Jean C. Villamil
- Unidad de Proteómica y Micosis Humanas, Grupo de Enfermedades Infecciosas Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Carrera 7 No. 43-82, Bogotá D.C. 110231, Colombia; (L.F.Q.); (J.C.V.)
| | - Yolima Baena
- Grupo de Investigación SILICOMOBA, Departamento de Farmacia, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Bogotá, Carrera 45 No. 26-85, Edificio 451 of. 449, Bogotá D.C. 11001, Colombia
| | - Claudia M. Parra-Giraldo
- Unidad de Proteómica y Micosis Humanas, Grupo de Enfermedades Infecciosas Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Carrera 7 No. 43-82, Bogotá D.C. 110231, Colombia; (L.F.Q.); (J.C.V.)
| | - Leon D. Perez
- Grupo de Investigación en Macromoléculas, Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia-Sede Bogotá, Carrera 45 No. 26-85, Edificio 451 of. 449, Bogotá D.C. 11001, Colombia;
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8
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Wu S, Geng F, He S, Liu W, Liu H, Huang M, Zhu C. Amphiphilic poly(caprolactone-b-N-hydroxyethyl acrylamide) micelles for controlled drug delivery. RSC Adv 2020; 10:29668-29674. [PMID: 35518233 PMCID: PMC9056162 DOI: 10.1039/d0ra01473g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 07/20/2020] [Indexed: 11/21/2022] Open
Abstract
To increase the bioavailability and water solubility of hydrophobic medicine, an amphiphilic block copolymer, polycaprolactone-block-polyhydroxyethyl acrylamide (PCL-b-PHEAA), was synthesized.
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Affiliation(s)
- Shuangxia Wu
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- PR China
| | - Fengjie Geng
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- PR China
| | - Suqin He
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- PR China
- Henan Key Laboratory of Advanced Nylon Materials and Application
| | - Wentao Liu
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- PR China
| | - Hao Liu
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- PR China
| | - Miaoming Huang
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- PR China
| | - Chengshen Zhu
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- PR China
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Villamil JC, Parra-Giraldo CM, Pérez LD. Enhancing the performance of PEG-b-PCL copolymers as precursors of micellar vehicles for amphotericin B through its conjugation with cholesterol. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.03.086] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Carrascal JJ, Villegas JM, Baena-Aristizábal CM, Baena Y, Perez LD. Nanoparticles based on a PEGylated methacrylate copolymer as vehicles for hydrophilic antimicrobial additives: a study on chemical interactions with a benzoic acid probe molecule. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04502-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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11
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Montaña JA, Perez LD, Baena Y. A pH-responsive drug delivery matrix from an interpolyelectrolyte complex: preparation and pharmacotechnical properties. BRAZ J PHARM SCI 2018. [DOI: 10.1590/s2175-97902018000217183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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12
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Ning W, Shang P, Wu J, Shi X, Liu S. Novel Amphiphilic, Biodegradable, Biocompatible, Thermo-Responsive ABA Triblock Copolymers Based on PCL and PEG Analogues via a Combination of ROP and RAFT: Synthesis, Characterization, and Sustained Drug Release from Self-Assembled Micelles. Polymers (Basel) 2018; 10:E214. [PMID: 30966251 PMCID: PMC6415266 DOI: 10.3390/polym10020214] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Revised: 02/13/2018] [Accepted: 02/14/2018] [Indexed: 11/19/2022] Open
Abstract
Well-defined novel, linear, biodegradable, amphiphilic thermo-responsive ABA-type triblock copolymers, poly[2-(2-methoxyethoxy) ethyl methacrylate-co-oligo(ethylene glycol) methacrylate]-b-poly(ε-caprolactone)-b-poly[2-(2-methoxyethoxy) ethyl methacrylate-co-oligo(ethylene glycol) methacrylate] [P(MEO₂MA-co-OEGMA)-b-PCL-b-P(MEO₂MA-co-OEGMA)] (tBPs), were synthesized via a combination of ring-opening polymerization (ROP) of ε-caprolactone (εCL) and reversible addition-fragmentation chain transfer polymerization (RAFT) of MEO₂MA and OEGMA comonomers. The chemical structures and compositions of these copolymers were characterized using Fourier transform infrared spectroscopy (FT-IR) and proton nuclear magnetic resonance (¹H NMR). The molecular weights of the copolymers were obtained using gel permeation chromatography (GPC) measurements. Thermo-responsive micelles were obtained by self-assembly of copolymers in aqueous medium. The temperature sensitivity and micelllization behavior of amphiphilic triblock copolymers solutions were studied by transmittance, fluorescence probe, surface tension, dynamic light scattering (DLS) and transmission electron microscopy (TEM). A hydrophobic drug, anethole, was encapsulated in micelles by using the dialysis method. The average particle sizes of drug-loaded micelles were determined by dynamic light scattering measurement. In vitro, the sustained release of the anethole was performed in pH 7.4 phosphate-buffered saline (PBS) at different temperatures. Results showed that the triblock copolymer's micelles were quite effective in the encapsulation and controlled release of anethole. The vial inversion test demonstrated that the triblock copolymers could trigger the sol-gel transition which also depended on the temperature, and its sol-gel transition temperature gradually decreased with increasing concentration. The hydrogel system could also be used as a carrier of hydrophobic drugs in medicine.
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Affiliation(s)
- Wenyan Ning
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Pei Shang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Jie Wu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Xiaoyu Shi
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Shouxin Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
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Wang X, Gao J, Wang Z, Xu J, Li C, Sun S, Hu S. Dissipative particle dynamics simulation on the self-assembly and disassembly of pH-sensitive polymeric micelle with coating repair agent. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.07.070] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Quintero C, Vera R, Perez LD. α-Tocopherol loaded thermosensitive polymer nanoparticles: preparation, in vitro release and antioxidant properties. POLIMEROS 2016. [DOI: 10.1590/0104-1428.2324] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Arteta SM, Vera R, Pérez LD. Hydrophobic cellulose fibers via ATRP and their performance in the removal of pyrene from water. J Appl Polym Sci 2016. [DOI: 10.1002/app.44482] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Sandra M. Arteta
- Departamento de Ingeniería Civil; Pontificia Universidad Javeriana; Bogotá D.C Colombia
| | - Ricardo Vera
- Departamento de Química; Pontificia Universidad Javeriana; Bogotá D.C Colombia
| | - León D. Pérez
- Departamento de Química; Universidad Nacional de Colombia; Carrera 45 N° 26-85, Edificio 451 of. 449 Bogotá D.C Colombia
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Li L, Lu B, Fan Q, Wei L, Wu J, Hou J, Guo X, Liu Z. Synthesis and pH-responsive self-assembly behavior of a fluorescent amphiphilic triblock copolymer mPEG-b-PCL-b-PDMAEMA-g-PC for the controlled intracellular delivery of doxorubicin. RSC Adv 2016. [DOI: 10.1039/c6ra01504b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic illustration of the pH-responsive self-assembly of a mPEG-b-PCL-b-PDMAEMA-g-PC copolymer with fluorescent coumarin units for controlling DOX release.
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Affiliation(s)
- Lei Li
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region
- Engineering Center for Chemical Materials of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
| | - Beibei Lu
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region
- Engineering Center for Chemical Materials of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
| | - Qikui Fan
- Center for Materials Chemistry
- Frontier Institute of Science and Technology
- Xi’an Jiaotong University Xi’an
- P. R. China
| | - Lulu Wei
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region
- Engineering Center for Chemical Materials of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
| | - Jianning Wu
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region
- Engineering Center for Chemical Materials of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
| | - Jun Hou
- Department of Immunology
- Department of Pathology and Key Laboratories for Xinjiang Endemic and Ethnic Diseases
- Shihezi University School of Medicine
- China
| | - Xuhong Guo
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region
- Engineering Center for Chemical Materials of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
| | - Zhiyong Liu
- College of Chemistry and Chemical Engineering
- Key Laboratory for Chemical Materials of Xinjiang Uygur Autonomous Region
- Engineering Center for Chemical Materials of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
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17
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Re-assembly behaviors of block copolymer micelles on substrates: effects of block length and interaction force. Colloid Polym Sci 2016. [DOI: 10.1007/s00396-015-3761-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Diaz IL, Parra C, Linarez M, Perez LD. Design of Micelle Nanocontainers Based on PDMAEMA-b-PCL-b-PDMAEMA Triblock Copolymers for the Encapsulation of Amphotericin B. AAPS PharmSciTech 2015; 16:1069-78. [PMID: 25669917 DOI: 10.1208/s12249-015-0298-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 01/19/2015] [Indexed: 12/24/2022] Open
Abstract
The clinical application of amphotericin B (AmB), a broad spectrum antifungal agent, is limited by its poor solubility in aqueous medium and also by its proven renal toxicity. In this work, AmB was encapsulated in micelles obtained from the self-assembly of PDMAEMA-b-PCL-b-PDMAEMA triblock copolymers. The amount of encapsulated AmB depended on the copolymer composition, and short blocks of polycaprolactone (PCL) and poly(2-dimethylaminoethyl methacrylate) (PDMAEMA) showed better performance. All the studied formulations exhibited a controlled release of AmB along 150 h. The formulations presented reduced hemotoxicity while maintaining antifungal activities against Candida albicans, Candida krusei, and Candida glabrata comparable with free AmB. A reduction on the hemotoxicity was found to be due to the slow release and subsequent low aggregation achieved with the use of polymer micelle nanocontainers.
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Self-assembly and paclitaxel loading capacity of α-tocopherol succinate-conjugated hydroxyethyl cellulose nanomicelle. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3736-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Peña JA, Gutiérrez SJ, Villamil JC, Agudelo NA, Pérez LD. Policaprolactone/polyvinylpyrrolidone/siloxane hybrid materials: Synthesis and in vitro delivery of diclofenac and biocompatibility with periodontal ligament fibroblasts. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 58:60-9. [PMID: 26478287 DOI: 10.1016/j.msec.2015.08.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 07/10/2015] [Accepted: 08/07/2015] [Indexed: 12/01/2022]
Abstract
In this paper, we report the synthesis of polycaprolactone (PCL) based hybrid materials containing hydrophilic domains composed of N-vinylpyrrolidone (VP), and γ-methacryloxypropyltrimethoxysilane (MPS). The hybrid materials were obtained by RAFT copolymerization of N-vinylpyrrolidone and MPS using a pre-formed dixanthate-end-functionalized PCL as macro-chain transfer agent, followed by a post-reaction crosslinking step. The composition of the samples was determined by elemental and thermogravimetric analyses. Differential scanning calorimetry and X-ray diffraction indicated that the crystallinity of PCL decreases in the presence of the hydrophilic domains. Scanning electron microscopy images revealed that the samples present an interconnected porous structure on the swelling. Compared to PCL, the hybrid materials presented low water contact angle values and higher elastic modulus. These materials showed controlled release of diclofenac, and biocompatibility with human periodontal ligament fibroblasts.
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Affiliation(s)
- José A Peña
- Departamento de Química, Pontificia Universidad Javeriana, Bogotá D.C., Colombia
| | - Sandra J Gutiérrez
- Centro de investigaciones Odontológicas, Facultad de Odontología, Pontificia Universidad Javeriana, Bogotá, Colombia.
| | - Jean C Villamil
- Centro de investigaciones Odontológicas, Facultad de Odontología, Pontificia Universidad Javeriana, Bogotá, Colombia
| | | | - León D Pérez
- Grupo de Macromoléculas, Departamento de Química, Universidad Nacional de Colombia, Carrera 45 No 26-85, edificio 451 of. 449, Bogotá D.C. Colombia.
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