1
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Liu J, Liu N, Xu Y, Wu M, Zhang H, Wang Y, Yan Y, Hill A, Song R, Xu Z, Park M, Wu Y, Ciatti JL, Gu J, Luan H, Zhang Y, Yang T, Ahn HY, Li S, Ray WZ, Franz CK, MacEwan MR, Huang Y, Hammill CW, Wang H, Rogers JA. Bioresorbable shape-adaptive structures for ultrasonic monitoring of deep-tissue homeostasis. Science 2024; 383:1096-1103. [PMID: 38452063 DOI: 10.1126/science.adk9880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 01/12/2024] [Indexed: 03/09/2024]
Abstract
Monitoring homeostasis is an essential aspect of obtaining pathophysiological insights for treating patients. Accurate, timely assessments of homeostatic dysregulation in deep tissues typically require expensive imaging techniques or invasive biopsies. We introduce a bioresorbable shape-adaptive materials structure that enables real-time monitoring of deep-tissue homeostasis using conventional ultrasound instruments. Collections of small bioresorbable metal disks distributed within thin, pH-responsive hydrogels, deployed by surgical implantation or syringe injection, allow ultrasound-based measurements of spatiotemporal changes in pH for early assessments of anastomotic leaks after gastrointestinal surgeries, and their bioresorption after a recovery period eliminates the need for surgical extraction. Demonstrations in small and large animal models illustrate capabilities in monitoring leakage from the small intestine, the stomach, and the pancreas.
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Affiliation(s)
- Jiaqi Liu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Naijia Liu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Yameng Xu
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Mingzheng Wu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Haohui Zhang
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Yue Wang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Ying Yan
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Angela Hill
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Ruihao Song
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Zijie Xu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Minsu Park
- Department of Polymer Science and Engineering, Dankook University, Yongin 16890, Republic of Korea
| | - Yunyun Wu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Joanna L Ciatti
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Jianyu Gu
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Haiwen Luan
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Yamin Zhang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Tianyu Yang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Hak-Young Ahn
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
| | - Shupeng Li
- Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Wilson Z Ray
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Colin K Franz
- Regenerative Neurorehabilitation Laboratory, Shirley Ryan AbilityLab, Chicago, IL 60611, USA
- Department of Physical Medicine and Rehabilitation, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- The Ken and Ruth Davee Department of Neurology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Matthew R MacEwan
- Department of Neurosurgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Yonggang Huang
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Chet W Hammill
- Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Heling Wang
- Laboratory of Flexible Electronics Technology, Tsinghua University, Beijing 100084, China
- Institute of Flexible Electronics Technology of THU Zhejiang, Jiaxing 314000, China
| | - John A Rogers
- Querrey Simpson Institute for Bioelectronics, Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Neurological Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
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2
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Kulkarni B, Qutub S, Khashab NM, Hadjichristidis N. Rhodamine B-Conjugated Fluorescent Block Copolymer Micelles for Efficient Chlorambucil Delivery and Intracellular Imaging. ACS OMEGA 2023; 8:22698-22707. [PMID: 37396240 PMCID: PMC10308396 DOI: 10.1021/acsomega.3c01514] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/25/2023] [Indexed: 07/04/2023]
Abstract
The clinical development of the anticancer drug chlorambucil (CHL) is limited by its low solubility in water, poor bioavailability, and off-target toxicity. Besides, another constraint for monitoring intracellular drug delivery is the non-fluorescent nature of CHL. Nanocarriers based on block copolymers of poly(ethylene glycol)/poly(ethylene oxide) (PEG/PEO) and poly(ε-caprolactone) (PCL) are an elegant choice for drug delivery applications due to their high biocompatibility and inherent biodegradability properties. Here, we have designed and prepared block copolymer micelles (BCM) containing CHL (BCM-CHL) from a block copolymer having fluorescent probe rhodamine B (RhB) end-groups to achieve efficient drug delivery and intracellular imaging. For this purpose, the previously reported tetraphenylethylene (TPE)-containing poly(ethylene oxide)-b-poly(ε-caprolactone) [TPE-(PEO-b-PCL)2] triblock copolymer was conjugated with RhB by a feasible and effective post-polymerization modification method. In addition, the block copolymer was obtained by a facile and efficient synthetic strategy of one-pot block copolymerization. The amphiphilicity of the resulting block copolymer TPE-(PEO-b-PCL-RhB)2 led to the spontaneous formation of micelles (BCM) in aqueous media and successful encapsulation of the hydrophobic anticancer drug CHL (CHL-BCM). Dynamic light scattering and transmission electron microscopy analyses of BCM and CHL-BCM revealed a favorable size (10-100 nm) for passive targeting of tumor tissues via the enhanced permeability and retention effect. The fluorescence emission spectrum (λex 315 nm) of BCM demonstrated Förster resonance energy transfer between TPE aggregates (donor) and RhB (acceptor). On the other hand, CHL-BCM revealed TPE monomer emission, which may be attributed to the π-π stacking interaction between TPE and CHL molecules. The in vitro drug release profile showed that CHL-BCM exhibits drug release in a sustained manner over 48 h. A cytotoxicity study proved the biocompatibility of BCM, while CHL-BCM revealed significant toxicity to cervical (HeLa) cancer cells. The inherent fluorescence of RhB in the block copolymer offered an opportunity to directly monitor the cellular uptake of the micelles by confocal laser scanning microscopy imaging. These results demonstrate the potential of these block copolymers as drug nanocarriers and as bioimaging probes for theranostic applications.
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Affiliation(s)
- Bhagyashree Kulkarni
- Polymer
Synthesis Laboratory, Chemistry Program, KAUST Catalysis Center, Physical
Sciences and Engineering Division, King
Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
| | - Somayah Qutub
- Smart
Hybrid Materials (SHMs) Laboratory, Chemistry Program, Advanced Membranes
and Porous Materials Center, King Abdullah
University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Niveen M. Khashab
- Smart
Hybrid Materials (SHMs) Laboratory, Chemistry Program, Advanced Membranes
and Porous Materials Center, King Abdullah
University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Nikos Hadjichristidis
- Polymer
Synthesis Laboratory, Chemistry Program, KAUST Catalysis Center, Physical
Sciences and Engineering Division, King
Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
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3
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Synthesis & characterization of amino acid-based acrylamide derived amphiphilic block copolymer using a new xanthate and its influence on cell cytotoxicity & cell viability. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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4
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Zanata DDM, Felisberti MI. Thermo- and pH-responsive POEGMA-b-PDMAEMA-b-POEGMA triblock copolymers. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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5
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Carvalho LT, Moraes RM, Teixeira AJRM, Tada DB, Alves GM, Lacerda TM, Santos JC, Santos AM, Medeiros SF. Development of pullulan‐based carriers for controlled release of hydrophobic ingredients. J Appl Polym Sci 2021. [DOI: 10.1002/app.51344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Layde T. Carvalho
- Department of Biotechnology Engineering School of Lorena, University of São Paulo Lorena São Paulo Brazil
| | - Rodolfo M. Moraes
- Department of Chemical Engineering Engineering School of Lorena, University of São Paulo Lorena São Paulo Brazil
| | - Ana Julia R. M. Teixeira
- Department of Chemical Engineering Engineering School of Lorena, University of São Paulo Lorena São Paulo Brazil
| | - Dayane B. Tada
- Laboratory of Nanomaterials and Nanotoxicology Federal University of São Paulo São José dos Campos São Paulo Brazil
| | - Gizelda M. Alves
- Department of Chemical Engineering Engineering School of Lorena, University of São Paulo Lorena São Paulo Brazil
| | - Talita M. Lacerda
- Department of Biotechnology Engineering School of Lorena, University of São Paulo Lorena São Paulo Brazil
| | - Julio C. Santos
- Department of Biotechnology Engineering School of Lorena, University of São Paulo Lorena São Paulo Brazil
| | - Amilton M. Santos
- Department of Chemical Engineering Engineering School of Lorena, University of São Paulo Lorena São Paulo Brazil
| | - Simone F. Medeiros
- Department of Biotechnology Engineering School of Lorena, University of São Paulo Lorena São Paulo Brazil
- Department of Chemical Engineering Engineering School of Lorena, University of São Paulo Lorena São Paulo Brazil
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6
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Flemming P, Münch AS, Fery A, Uhlmann P. Constrained thermoresponsive polymers - new insights into fundamentals and applications. Beilstein J Org Chem 2021; 17:2123-2163. [PMID: 34476018 PMCID: PMC8381851 DOI: 10.3762/bjoc.17.138] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 08/10/2021] [Indexed: 12/15/2022] Open
Abstract
In the last decades, numerous stimuli-responsive polymers have been developed and investigated regarding their switching properties. In particular, thermoresponsive polymers, which form a miscibility gap with the ambient solvent with a lower or upper critical demixing point depending on the temperature, have been intensively studied in solution. For the application of such polymers in novel sensors, drug delivery systems or as multifunctional coatings, they typically have to be transferred into specific arrangements, such as micelles, polymer films or grafted nanoparticles. However, it turns out that the thermodynamic concept for the phase transition of free polymer chains fails, when thermoresponsive polymers are assembled into such sterically confined architectures. Whereas many published studies focus on synthetic aspects as well as individual applications of thermoresponsive polymers, the underlying structure-property relationships governing the thermoresponse of sterically constrained assemblies, are still poorly understood. Furthermore, the clear majority of publications deals with polymers that exhibit a lower critical solution temperature (LCST) behavior, with PNIPAAM as their main representative. In contrast, for polymer arrangements with an upper critical solution temperature (UCST), there is only limited knowledge about preparation, application and precise physical understanding of the phase transition. This review article provides an overview about the current knowledge of thermoresponsive polymers with limited mobility focusing on UCST behavior and the possibilities for influencing their thermoresponsive switching characteristics. It comprises star polymers, micelles as well as polymer chains grafted to flat substrates and particulate inorganic surfaces. The elaboration of the physicochemical interplay between the architecture of the polymer assembly and the resulting thermoresponsive switching behavior will be in the foreground of this consideration.
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Affiliation(s)
- Patricia Flemming
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - Alexander S Münch
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
| | - Andreas Fery
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - Petra Uhlmann
- Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Germany
- University of Nebraska-Lincoln, NE 68588, Lincoln, USA
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7
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Venu P, Kumar R, Chethelen RJ, Shunmugam R. Designing amphiphilic branched polymers for supramolecular self-assembly. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2021. [DOI: 10.1080/10601325.2021.1912613] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Parvathy Venu
- Polymer Research Centre, Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
| | - Rajan Kumar
- Polymer Research Centre, Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
| | - Roshni J. Chethelen
- Polymer Research Centre, Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
| | - Raja Shunmugam
- Polymer Research Centre, Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
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8
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Ghezzi M, Pescina S, Padula C, Santi P, Del Favero E, Cantù L, Nicoli S. Polymeric micelles in drug delivery: An insight of the techniques for their characterization and assessment in biorelevant conditions. J Control Release 2021; 332:312-336. [PMID: 33652113 DOI: 10.1016/j.jconrel.2021.02.031] [Citation(s) in RCA: 344] [Impact Index Per Article: 114.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 12/16/2022]
Abstract
Polymeric micelles, i.e. aggregation colloids formed in solution by self-assembling of amphiphilic polymers, represent an innovative tool to overcome several issues related to drug administration, from the low water-solubility to the poor drug permeability across biological barriers. With respect to other nanocarriers, polymeric micelles generally display smaller size, easier preparation and sterilization processes, and good solubilization properties, unfortunately associated with a lower stability in biological fluids and a more complicated characterization. Particularly challenging is the study of their interaction with the biological environment, essential to predict the real in vivo behavior after administration. In this review, after a general presentation on micelles features and properties, different characterization techniques are discussed, from the ones used for the determination of micelles basic characteristics (critical micellar concentration, size, surface charge, morphology) to the more complex approaches used to figure out micelles kinetic stability, drug release and behavior in the presence of biological substrates (fluids, cells and tissues). The techniques presented (such as dynamic light scattering, AFM, cryo-TEM, X-ray scattering, FRET, symmetrical flow field-flow fractionation (AF4) and density ultracentrifugation), each one with their own advantages and limitations, can be combined to achieve a deeper comprehension of polymeric micelles in vivo behavior. The set-up and validation of adequate methods for micelles description represent the essential starting point for their development and clinical success.
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Affiliation(s)
- M Ghezzi
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - S Pescina
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - C Padula
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - P Santi
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy
| | - E Del Favero
- Department of Medical Biotechnologies and Translational Medicine, LITA, University of Milan, Segrate, Italy
| | - L Cantù
- Department of Medical Biotechnologies and Translational Medicine, LITA, University of Milan, Segrate, Italy
| | - S Nicoli
- ADDRes Lab, Department of Food and Drug, University of Parma, Parco Area delle Scienze 27/A, 43124 Parma, Italy.
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9
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Mandal P, Shunmugam R. Polycaprolactone: a biodegradable polymer with its application in the field of self-assembly study. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2020. [DOI: 10.1080/10601325.2020.1831392] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Piyali Mandal
- Polymer Research Centre, Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
| | - Raja Shunmugam
- Polymer Research Centre, Department of Chemical Sciences and Centre for Advanced Functional Materials, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal, India
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10
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Koochaki A, Moghbeli MR, Nikkhah SJ, Ianiro A, Tuinier R. Dual responsive PMEEECL–PAE block copolymers: a computational self-assembly and doxorubicin uptake study. RSC Adv 2020; 10:3233-3245. [PMID: 35497759 PMCID: PMC9048636 DOI: 10.1039/c9ra09066e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 01/08/2020] [Indexed: 11/21/2022] Open
Abstract
The self-assembly behaviour of dual-responsive block copolymers and their ability to solubilize the anticancer drug doxorubicin (DOX) has been investigated using all-atom molecular dynamics (MD) simulations, MARTINI coarse-grained (CG) force field simulation and Scheutjens–Fleer self-consistent field (SCF) computations. These diblock copolymers, composed of poly{γ-2-[2-(2-methoxyethoxy)ethoxy]ethoxy-ε-caprolactone} (PMEEECL) and poly(β-amino ester) (PAE) are dual-responsive: the PMEEECL block is thermoresponsive (becomes insoluble above a certain temperature), while the PAE block is pH-responsive (becomes soluble below a certain pH). Three MEEECL20–AEM compositions with M = 5, 10, and 15, have been studied. All-atom MD simulations have been performed to calculate the coil-to-globule transition temperature (Tcg) of these copolymers and finding appropriate CG mapping for both PMEEECL–PAE and DOX. The output of the MARTINI CG simulations is in agreement with SCF predictions. The results show that DOX is solubilized with high efficiency (75–80%) at different concentrations inside the PMEEECL–PAE micelles, although, interestingly, the loading efficiency is reduced by increasing the drug concentration. The non-bonded interaction energy and the RDF between DOX and water beads confirm this result. Finally, MD simulations and SCF computations reveal that the responsive behaviour of PMEEECL–PAE self-assembled structures take place at temperature and pH ranges appropriate for drug delivery. The self-assembly behaviour of dual-responsive block copolymers and their ability to solubilize the drug doxorubicin is demonstrated using molecular dynamics simulations, coarse-grained force field simulations and self-consistent field theory.![]()
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Affiliation(s)
- Amin Koochaki
- Smart Polymers and Nanocomposites Research Group
- School of Chemical Engineering
- Iran University of Science and Technology
- Tehran 16846-13114
- Iran
| | - Mohammad Reza Moghbeli
- Smart Polymers and Nanocomposites Research Group
- School of Chemical Engineering
- Iran University of Science and Technology
- Tehran 16846-13114
- Iran
| | - Sousa Javan Nikkhah
- Smart Polymers and Nanocomposites Research Group
- School of Chemical Engineering
- Iran University of Science and Technology
- Tehran 16846-13114
- Iran
| | - Alessandro Ianiro
- Laboratory of Physical Chemistry
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
- The Netherlands
| | - Remco Tuinier
- Laboratory of Physical Chemistry
- Department of Chemical Engineering and Chemistry
- Eindhoven University of Technology
- 5600 MB Eindhoven
- The Netherlands
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11
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Dag A, Omurtag Ozgen PS, Atasoy S. Glyconanoparticles for Targeted Tumor Therapy of Platinum Anticancer Drug. Biomacromolecules 2019; 20:2962-2972. [DOI: 10.1021/acs.biomac.9b00528] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
| | - Pinar Sinem Omurtag Ozgen
- Department of Analytical Chemistry, School of Pharmacy, Istanbul Medipol University, İstanbul 34810, Turkey
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12
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Pan Q, Zong Z, Shen J, Xue H, Pu Y. Synthesis, self-assembly, and pH-responsive drug release of PHMEMA-PEG-PHMEMA ABA triblock copolymers. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2018.1526039] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Qingqing Pan
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
- School of Foundational Courses, Bengbu Medical School, Bengbu, China
| | - Zhihui Zong
- School of Foundational Courses, Bengbu Medical School, Bengbu, China
| | - Jingyi Shen
- School of Foundational Courses, Bengbu Medical School, Bengbu, China
| | - Hongbao Xue
- School of Foundational Courses, Bengbu Medical School, Bengbu, China
| | - Yuji Pu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
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13
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Deen GR, Loh XJ. Stimuli-Responsive Cationic Hydrogels in Drug Delivery Applications. Gels 2018; 4:E13. [PMID: 30674789 PMCID: PMC6318685 DOI: 10.3390/gels4010013] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 01/29/2018] [Accepted: 01/30/2018] [Indexed: 12/11/2022] Open
Abstract
Stimuli-responsive, smart, intelligent, or environmentally sensitive polymers respond to changes in external stimuli such as pH, temperature, ionic strength, surfactants, pressure, light, biomolecules, and magnetic field. These materials are developed in various network architectures such as block copolymers, crosslinked hydrogels, nanogels, inter-penetrating networks, and dendrimers. Stimuli-responsive cationic polymers and hydrogels are an interesting class of "smart" materials that respond reversibly to changes in external pH. These materials have the ability to swell extensively in solutions of acidic pH and de-swell or shrink in solutions of alkaline pH. This reversible swelling-shrinking property brought about by changes in external pH conditions makes these materials useful in a wide range of applications such as drug delivery systems and chemical sensors. This article focuses mainly on the properties of these interesting materials and their applications in drug delivery systems.
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Affiliation(s)
- G Roshan Deen
- Soft Materials Laboratory, Natural Sciences and Science Education AG, National Institute of Education, Nanyang Technological University, 1-Nanyang Walk, Singapore 637616, Singapore.
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, 2-Fusionopolis Way, Singapore 138634, Singapore.
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14
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Kurzhals S, Schroffenegger M, Gal N, Zirbs R, Reimhult E. Influence of Grafted Block Copolymer Structure on Thermoresponsiveness of Superparamagnetic Core-Shell Nanoparticles. Biomacromolecules 2017; 19:1435-1444. [PMID: 29161516 PMCID: PMC5954351 DOI: 10.1021/acs.biomac.7b01403] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
![]()
The
morphology and topology of thermoresponsive polymers have a
strong impact on their responsive properties. Grafting onto spherical
particles has been shown to reduce responsiveness and transition temperatures;
grafting of block copolymers has shown that switchable or retained
wettability of a surface or particle during desolvation of one block
can take place. Here, doubly thermoresponsive block copolymers were
grafted onto spherical, monodisperse, and superparamagnetic iron oxide
nanoparticles to investigate the effect of thermal desolvation on
spherical brushes of block copolymers. By inverting the block order,
the influence of core proximity on the responsive properties of the
individual blocks could be studied as well as their relative influence
on the nanoparticle colloidal stability. The inner block was shown
to experience a stronger reduction in transition temperature and transition
enthalpy compared to the outer block. Still, the outer block also
experiences a significant reduction in responsiveness due to the restricted
environment in the nanoparticle shell compared to that of the free
polymer state. The demonstrated pronounced distance dependence importantly
implies the possibility, but also the necessity, to radially tailor
polymer hydration transitions for applications such as drug delivery,
hyperthermia, and biotechnological separation for which thermally
responsive nanoparticles are being developed.
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Affiliation(s)
- Steffen Kurzhals
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences, Vienna , Muthgasse 11 , 1190 Vienna , Austria
| | - Martina Schroffenegger
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences, Vienna , Muthgasse 11 , 1190 Vienna , Austria
| | - Noga Gal
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences, Vienna , Muthgasse 11 , 1190 Vienna , Austria
| | - Ronald Zirbs
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences, Vienna , Muthgasse 11 , 1190 Vienna , Austria
| | - Erik Reimhult
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences, Vienna , Muthgasse 11 , 1190 Vienna , Austria
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15
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PCL- b -P(MMA- co -DMAEMA) 2 new triblock copolymer for novel pH-sensitive nanocapsules intended for drug delivery to tumors. REACT FUNCT POLYM 2017. [DOI: 10.1016/j.reactfunctpolym.2017.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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16
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Barrella MC, Di Capua A, Adami R, Reverchon E, Mella M, Izzo L. Impact of intermolecular drug-copolymer interactions on size and drug release kinetics from pH-responsive polymersomes. Supramol Chem 2017. [DOI: 10.1080/10610278.2017.1377836] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Maria Chiara Barrella
- Dipartimento di Chimica e Biologia, Università degli Studi di Salerno, Fisciano, Italy
| | - Alessia Di Capua
- Dipartimento di Ingegneria Industriale, Università degli Studi di Salerno, Fisciano, Italy
| | - Renata Adami
- Dipartimento di Ingegneria Industriale, Università degli Studi di Salerno, Fisciano, Italy
| | - Ernesto Reverchon
- Dipartimento di Ingegneria Industriale, Università degli Studi di Salerno, Fisciano, Italy
| | - Massimo Mella
- Dipartimento di Scienza ed Alta Tecnologia, Università degli Studi dell’Insubria, Como, Italy
| | - Lorella Izzo
- Dipartimento di Chimica e Biologia, Università degli Studi di Salerno, Fisciano, Italy
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17
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Deshmukh AS, Chauhan PN, Noolvi MN, Chaturvedi K, Ganguly K, Shukla SS, Nadagouda MN, Aminabhavi TM. Polymeric micelles: Basic research to clinical practice. Int J Pharm 2017; 532:249-268. [PMID: 28882486 DOI: 10.1016/j.ijpharm.2017.09.005] [Citation(s) in RCA: 139] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 09/02/2017] [Accepted: 09/02/2017] [Indexed: 12/17/2022]
Abstract
Rapidly developing polymeric micelles as potential targeting carriers has intensified the need for better understanding of the underlying principles related to the selection of suitable delivery materials for designing, characterizing, drug loading, improving stability, targetability, biosafety and efficacy. The emergence of advanced analytical tools such as fluorescence resonance energy transfer and dissipative particle dynamics has identified new dimensions of these nanostructures and their behavior in much greater details. This review summarizes recent efforts in the development of polymeric micelles with respect to their architecture, formulation strategy and targeting possibilities along with their preclinical and clinical aspects. Literature of the past decade is discussed critically with special reference to the chemistry involved in the formation and clinical applications of these versatile materials. Thus, our main objective is to provide a timely update on the current status of polymeric micelles highlighting their applications and the important parameters that have led to successful delivery of drugs to the site of action.
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Affiliation(s)
- Anand S Deshmukh
- Department of Pharmaceutical Research, Shree Dhanvantary Pharmacy College, Kim, Surat, Gujarat 394 110, India.
| | - Pratik N Chauhan
- Department of Pharmaceutical Research, Shree Dhanvantary Pharmacy College, Kim, Surat, Gujarat 394 110, India
| | - Malleshappa N Noolvi
- Department of Pharmaceutical Research, Shree Dhanvantary Pharmacy College, Kim, Surat, Gujarat 394 110, India
| | - Kiran Chaturvedi
- Department of Pharmaceutical Research, Shree Dhanvantary Pharmacy College, Kim, Surat, Gujarat 394 110, India
| | - Kuntal Ganguly
- Department of Pharmaceutical Research, Shree Dhanvantary Pharmacy College, Kim, Surat, Gujarat 394 110, India
| | - Shyam S Shukla
- Department of Pharmaceutical Research, Shree Dhanvantary Pharmacy College, Kim, Surat, Gujarat 394 110, India
| | - Mallikarjuna N Nadagouda
- Department of Pharmaceutical Research, Shree Dhanvantary Pharmacy College, Kim, Surat, Gujarat 394 110, India
| | - Tejraj M Aminabhavi
- Department of Pharmaceutical Research, Shree Dhanvantary Pharmacy College, Kim, Surat, Gujarat 394 110, India.
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18
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Su CM, Lin C, Huang CY, Yeh JC, Tsai TY, Ger TR, Wang MC, Lou SL. Dextran-g-lauric acid as IKK complex inhibitor carrier. RSC Adv 2017. [DOI: 10.1039/c7ra04544a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Copolymeric micelles made from dextran-g-lauric acid with different molecular weights were optimized to carry IκB kinase-β inhibitor, IMD-0354, for melanoma treatment.
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Affiliation(s)
- Chao-Ming Su
- Department of Biomedical Engineering
- College of Engineering
- Chung Yuan Christian University
- Chungli 32023
- Republic of China
| | - Ching Lin
- Department of Biomedical Engineering
- College of Engineering
- Chung Yuan Christian University
- Chungli 32023
- Republic of China
| | - Chen-Yu Huang
- Department of Physics and Astronomy
- Johns Hopkins University
- USA
| | - Jih-Chao Yeh
- Department of Biomedical Engineering
- College of Engineering
- Chung Yuan Christian University
- Chungli 32023
- Republic of China
| | - Tien-Yao Tsai
- Department of Biomedical Engineering
- College of Engineering
- Chung Yuan Christian University
- Chungli 32023
- Republic of China
| | - Tzong Rong Ger
- Department of Biomedical Engineering
- College of Engineering
- Chung Yuan Christian University
- Chungli 32023
- Republic of China
| | - Ming-Chen Wang
- Department of Biomedical Engineering
- College of Engineering
- Chung Yuan Christian University
- Chungli 32023
- Republic of China
| | - Shyh-Liang Lou
- Department of Biomedical Engineering
- College of Engineering
- Chung Yuan Christian University
- Chungli 32023
- Republic of China
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19
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Tzankova V, Gorinova C, Kondeva-Burdina M, Simeonova R, Philipov S, Konstantinov S, Petrov P, Galabov D, Yoncheva K. In vitro and in vivo toxicity evaluation of cationic PDMAEMA-PCL-PDMAEMA micelles as a carrier of curcumin. Food Chem Toxicol 2016; 97:1-10. [DOI: 10.1016/j.fct.2016.08.026] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 07/25/2016] [Accepted: 08/22/2016] [Indexed: 01/11/2023]
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20
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New stimuli-responsive polyampholyte: Effect of chemical structure and composition on solution properties and swelling mechanism. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.09.094] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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21
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Boissé S, Kryuchkov MA, Tien ND, Bazuin CG, Prud’homme RE. PLLA Crystallization in Linear AB and BAB Copolymers of l-Lactide and 2-Dimethylaminoethyl Methacrylate. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01139] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stéphanie Boissé
- Département
de chimie, Centre de recherche sur les matériaux auto-assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, QC, Canada H3C 3J7
| | - Maksym A. Kryuchkov
- Département
de chimie, Centre de recherche sur les matériaux auto-assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, QC, Canada H3C 3J7
| | - Nguyen-Dung Tien
- Département
de chimie, Centre de recherche sur les matériaux auto-assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, QC, Canada H3C 3J7
| | - C. Géraldine Bazuin
- Département
de chimie, Centre de recherche sur les matériaux auto-assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, QC, Canada H3C 3J7
| | - Robert E. Prud’homme
- Département
de chimie, Centre de recherche sur les matériaux auto-assemblés
(CRMAA/CSACS), Université de Montréal, C.P. 6128 Succ. Centre-ville, Montréal, QC, Canada H3C 3J7
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22
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Khan MH, Jung JY. Ozonation of chlortetracycline in the aqueous phase: Degradation intermediates and pathway confirmed by NMR. CHEMOSPHERE 2016; 152:31-38. [PMID: 26963235 DOI: 10.1016/j.chemosphere.2016.01.063] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 12/28/2015] [Accepted: 01/15/2016] [Indexed: 06/05/2023]
Abstract
Chlortetracycline (CTC) degradation mechanism in aqueous phase ozonation was evaluated for degradation mechanism and its correlation with the biodegradability and mineralization. CTC was removed within 8 and 4 min of ozonation at pH 2.2 and 7.0, respectively. At pH 2.2, HPLC-triple quadrupole mass spectrometry (MS) detected 30 products. The structures for some of these products were proposed on the basis of ozonation chemistry, CTC structure and MS data; these structures were then confirmed by nuclear magnetic resonance (NMR) spectra. Double bond cleavages, dimethyl amino group oxidation, opening and removal of the aromatic ring and dechlorination, mostly direct ozonation reactions, gave products with molecular weights (m.w.) 494, 510, 524, 495 and 413, respectively. Subsequent degradations gave products with m.w. 449, 465, 463 and 415. These products were arranged into a degradation pathway. At pH 7.0, the rate of reaction was increased, though the detected products were similar. Direct ozonation at pH 2.2 increased the biodegradability by altering the structures of CTC and its products. Nevertheless, direct ozonation alone remained insufficient for the mineralization, which was efficient at pH 7.0 due to the production of free radicals.
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Affiliation(s)
- M Hammad Khan
- Department of Environmental Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan-si, Gyeongsangbuk-do 38541, Republic of Korea
| | - Jin-Young Jung
- Department of Environmental Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan-si, Gyeongsangbuk-do 38541, Republic of Korea.
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23
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Seidi F, Zarei A. ATRP grafting of poly(N,N-dimethylamino-2-ethyl methacrylate) onto the fatty-acid-modified agarose backbone via the “grafting-from” technique. STARCH-STARKE 2016. [DOI: 10.1002/star.201500352] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Farzad Seidi
- Department of Chemistry, Sanandaj Branch; Islamic Azad University; Sanandaj Iran
| | - Armin Zarei
- Young Researchers and Elite Club, Sanandaj Branch; Islamic Azad university; Sanandaj Iran
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24
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Le Fer G, Amiel C, Volet G. Copolymers based on azidopentyl-2-oxazoline: Synthesis, characterization and LCST behavior. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.08.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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25
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Cationic triblock copolymer micelles enhance antioxidant activity, intracellular uptake and cytotoxicity of curcumin. Int J Pharm 2015; 490:298-307. [PMID: 26026253 DOI: 10.1016/j.ijpharm.2015.05.057] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 05/20/2015] [Accepted: 05/21/2015] [Indexed: 11/21/2022]
Abstract
The aim of the present study was to develop curcumin loaded cationic polymeric micelles and to evaluate their loading, preservation of curcumin antioxidant activity and intracellular uptake ability. The micelles were prepared from a triblock copolymer consisting of poly(ϵ-caprolactone) and very short poly(2-(dimethylamino) ethyl methacrylate) segments (PDMAEMA9-PCL70-PDMAEMA9). The micelles showed monomodal size distribution, mean diameter of 145 nm, positive charge (+72 mV), critical micellar concentration around 0.05 g/l and encapsulation efficiency of 87%. The ability of the micellar curcumin to scavenge the ABTS radical and hypochlorite ions was higher than that of the free curcumin. Confocal microscopy revealed that the uptake of curcumin by chronic myeloid leukemia derived K-562 cells and human multiple myeloma cells U-266 was more intensive when curcumin was loaded into the micelles. These results correlated with the higher cytotoxicity of the micellar curcumin compared to free curcumin. Intraperitoneal treatment of Wistar rats indicated that PDMAEMA-PCL-PDMAEMA copolymer, comprising very short cationic chains, did not change the levels of malondialdehyde and glutathione in livers indicating an absence of oxidative stress. Thus, PDMAEMA-PCL-PDMAEMA triblock micelles could be considered efficient and safe platform for curcumin delivery.
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26
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Clavel CM, Nowak-Sliwinska P, Păunescu E, Griffioen AW, Dyson PJ. In vivo evaluation of small-molecule thermoresponsive anticancer drugs potentiated by hyperthermia. Chem Sci 2015; 6:2795-2801. [PMID: 28706667 PMCID: PMC5489028 DOI: 10.1039/c5sc00613a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 03/17/2015] [Indexed: 11/21/2022] Open
Abstract
Hyperthermia used as an adjuvant with chemotherapy is highly promising in the treatment of certain cancers. Currently, the small molecule drugs used in combination with hyperthermia were not designed for this application. Herein, we report the evaluation of a chlorambucil and a ruthenium compound modified with a long fluorous chain, which exhibit thermoresponsive activity in colorectal adenocarcinoma xenografts in athymic mice in combination with mild hyperthermia (42 °C). Intraperitoneal injection of the derivatives followed by local hyperthermia showed a synergistic tumor growth reduction by 79% and 90% for the chlorambucil and ruthenium-based derivatives, respectively, with the latter exhibiting a higher synergy in combination with hyperthermia compared to the monotherapies. Histological analysis shows that both derivatives in combination with hyperthermia significantly decrease the number of proliferating tumor cells.
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Affiliation(s)
- Catherine M Clavel
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland . ; ; Tel: +41 21 693 98 54
| | - Patrycja Nowak-Sliwinska
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland . ; ; Tel: +41 21 693 98 54
| | - Emilia Păunescu
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland . ; ; Tel: +41 21 693 98 54
| | - Arjan W Griffioen
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland . ; ; Tel: +41 21 693 98 54
| | - Paul J Dyson
- Institut des Sciences et Ingénierie Chimiques , Ecole Polytechnique Fédérale de Lausanne (EPFL) , CH-1015 Lausanne , Switzerland . ; ; Tel: +41 21 693 98 54
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27
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Liu D, Zhang C, Zhang X, Zhen Z, Wang P, Li J, Yi D, Jin Y, Yang D. Permeation measurement of gestodene for some biodegradable materials using Franz diffusion cells. Saudi Pharm J 2015; 23:413-20. [PMID: 27134544 PMCID: PMC4834674 DOI: 10.1016/j.jsps.2015.01.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 01/01/2015] [Indexed: 01/21/2023] Open
Abstract
Biodegradable poly(d,l-lactide) (PDLLA), Poly(trimethylene carbonate) (PTMC), polycaprolactone (PCL), poly(caprolactone-co-d,l-lactide) (PCDLLA) and poly(trimethylene carbonate-co-caprolactone) (PTCL) are recently used for clinical drug delivery system such as subcutaneous contraceptive implant capsule due to their biodegradable properties that they could possess long-term stable performance in vivo without removal, however their permeation rate is unknown. In the work, biodegradable material membranes were prepared by solvent evaporation using chloroform, and commercial silicone rubber membrane served as a control. Gestodene was used as a model drug. Gestodene has high biologic progestational activity which allows for high contraceptive reliability at very low-dose levels. The permeation rate of gestodene for several biodegradable materials was evaluated. In vitro diffusion studies were done using Franz diffusion cells with a diffusion area of 1.33 cm2. Phosphate buffer solution (PBS, pH 7.4), 10% methanol solution and distilled water were taken in donor and receiver chambers at temperature of 37 °C respectively. The in vitro experiments were conducted over a period of 24 h during which samples were collected at regular intervals. The withdrawn samples were appropriately diluted and measured on UV–vis spectrophotometer at 247 nm. Conclusion data from our study showed that permeation rate of PCDLLA with CL ratio more than 70% could be more excellent than commercial silicone rubber membrane. They may be suitable as a candidate carrier for gestodene subcutaneous contraceptive implants in contraceptive fields.
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Affiliation(s)
| | - Chong Zhang
- Corresponding author. Tel.: +86 24 86800665; fax: +86 24 86806307.
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28
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Synthesis and micellization properties of triblock copolymers PDMAEMA-b-PCL-b-PDMAEMA and their applications in the fabrication of amphotericin B-loaded nanocontainers. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3478-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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29
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Dunderdale GJ, Urata C, Hozumi A. An underwater superoleophobic surface that can be activated/deactivated via external triggers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:13438-13446. [PMID: 25318101 DOI: 10.1021/la503492e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Poly[(2-dimethylamino)ethyl methacrylate] (pDMAEMA) brush surfaces were prepared using a facile aqueous Activators ReGenerated by Electron Transfer Atom Transfer Radical Polymerization (ARGET-ATRP) protocol at ambient temperature without any need to purge reaction solutions of oxygen. This produced underwater superoleophobic surfaces, which exhibited high advancing (θA, 164-166°) and receding (θR, 153-165°) contact angles (CAs) and low CA hysteresis (1-11°) with a variety of oils. Both in situ spectroscopic ellipsometry and dynamic CA measurements confirmed that pDMAEMA brush surfaces responded to three different external stimuli (pH, ionic strength, and temperature) by changing their thicknesses, degree of hydration, or their chemical composition. Increasing pH resulted in the largest decrease in hydration, followed by increasing temperature, and increasing ionic strength gave the smallest change in hydration. Coincident with these structural changes, stimulus-responsive dynamic dewetting behavior with various oils was observed. Increasing pH or ionic strength drastically reduced the θR values of oil drops and increased CA hysteresis, resulting in a sticky surface on which oil drops were pinned. No noticeable changes in dynamic oleophobicity were observed with increasing temperature. In addition, when oil drops impacted onto the brush surface instead of being gently placed, surfaces did not exhibit stimulus-responsive dewetting properties, being oleophobic under all conditions.
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Affiliation(s)
- Gary J Dunderdale
- Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST) , 2266-98, Anagahora, Shimoshidami, Moriyama, Nagoya 463-8560, Japan
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30
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Hu J, Zhang G, Ge Z, Liu S. Stimuli-responsive tertiary amine methacrylate-based block copolymers: Synthesis, supramolecular self-assembly and functional applications. Prog Polym Sci 2014. [DOI: 10.1016/j.progpolymsci.2013.10.006] [Citation(s) in RCA: 147] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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31
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Sergeeva O, Vlasov PS, Domnina NS, Bogomolova A, Konarev PV, Svergun DI, Walterova Z, Horsky J, Stepanek P, Filippov SK. Novel thermosensitive telechelic PEGs with antioxidant activity: synthesis, molecular properties and conformational behaviour. RSC Adv 2014. [DOI: 10.1039/c4ra06978a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
We report on the tailor-made polymer conjugates, which are highly compelling for biomedical applications due to their antioxidant activity and the adjustable thermosensitive properties.
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Affiliation(s)
- Olga Sergeeva
- Institute of Chemistry
- Saint-Petersburg State University
- Russia
| | - Petr S. Vlasov
- Institute of Chemistry
- Saint-Petersburg State University
- Russia
| | - Nina S. Domnina
- Institute of Chemistry
- Saint-Petersburg State University
- Russia
| | | | | | | | | | - Jiri Horsky
- Institute of Macromolecular Chemistry
- Prague, Czech Republic
| | - Petr Stepanek
- Institute of Macromolecular Chemistry
- Prague, Czech Republic
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32
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Mishra V, Jung SH, Park JM, Jeong HM, Lee HI. Triazole-Containing Hydrogels for Time-Dependent Sustained Drug Release. Macromol Rapid Commun 2013; 35:442-6. [DOI: 10.1002/marc.201300585] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 08/20/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Vivek Mishra
- Department of Chemistry; University of Ulsan; Ulsan 680-749 Republic of Korea
| | - Seo-Hyun Jung
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 681-802 Republic of Korea
| | - Jong Mok Park
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 681-802 Republic of Korea
| | - Han Mo Jeong
- Department of Chemistry; University of Ulsan; Ulsan 680-749 Republic of Korea
| | - Hyung-il Lee
- Department of Chemistry; University of Ulsan; Ulsan 680-749 Republic of Korea
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33
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Wu Q, Wang L, Fu X, Song X, Yang Q, Zhang G. Synthesis and self-assembly of a new amphiphilic thermosensitive poly(N-vinylcaprolactam)/poly(ε-caprolactone) block copolymer. Polym Bull (Berl) 2013. [DOI: 10.1007/s00289-013-1041-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Bury K, Du Prez F, Neugebauer D. Self-assembling Linear and Star Shaped Poly(ϵ-caprolactone)/poly[(meth)acrylic acid] Block Copolymers as Carriers of Indomethacin and Quercetin. Macromol Biosci 2013; 13:1520-30. [DOI: 10.1002/mabi.201300179] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 06/05/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Katarzyna Bury
- Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry; Silesian University of Technology; M. Strzody 9, 44-100 Gliwice Poland
| | - Filip Du Prez
- Department of Organic Chemistry, Polymer Chemistry Research Group, Faculty of Science; Ghent University; Krijgslaan 281 S4-bis, B-9000 Ghent Belgium
| | - Dorota Neugebauer
- Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry; Silesian University of Technology; M. Strzody 9, 44-100 Gliwice Poland
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35
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Bi Y, Yan C, Shao L, Wang Y, Ma Y, Tang G. Well-defined thermoresponsive dendritic polyamide/poly(N
-vinylcaprolactam) block copolymers. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26716] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yunmei Bi
- Department of Medicinal Chemistry; College of Chemistry and Chemical Engineering, Yunnan Normal University; Kunming 650092 People's Republic of China
| | - Caixian Yan
- Department of Medicinal Chemistry; College of Chemistry and Chemical Engineering, Yunnan Normal University; Kunming 650092 People's Republic of China
| | - Lidong Shao
- Department of Medicinal Chemistry; College of Chemistry and Chemical Engineering, Yunnan Normal University; Kunming 650092 People's Republic of China
| | - Yufei Wang
- Department of Medicinal Chemistry; College of Chemistry and Chemical Engineering, Yunnan Normal University; Kunming 650092 People's Republic of China
| | - Yongcui Ma
- Department of Medicinal Chemistry; College of Chemistry and Chemical Engineering, Yunnan Normal University; Kunming 650092 People's Republic of China
| | - Gang Tang
- Department of Medicinal Chemistry; College of Chemistry and Chemical Engineering, Yunnan Normal University; Kunming 650092 People's Republic of China
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36
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Corrales T, Larraza I, Catalina F, Portolés T, Ramírez-Santillán C, Matesanz M, Abrusci C. In vitro biocompatibility and antimicrobial activity of poly(ε-caprolactone)/montmorillonite nanocomposites. Biomacromolecules 2012; 13:4247-56. [PMID: 23153018 DOI: 10.1021/bm301537g] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A triblock copolymer based on poly(ε-caprolactone) (PCL) and 2-(N,N-diethylamino)ethyl methacrylate (DEAEMA)/2-(methyl-7-nitrobenzofurazan)amino ethyl acrylate (NBD-NAcri), was synthesized via atom transfer radical polymerization (ATRP). The corresponding chlorohydrated copolymer, named as PCL-b-DEAEMA, was prepared and anchored via cationic exchange on montmorillonite (MMT) surface. (PCL)/layered silicate nanocomposites were prepared through melt intercalation, and XRD and TEM analysis showed an exfoliated/intercalated morphology for organomodified clay. The surface characterization of the nanocomposites was undertaken by using contact angle and AFM. An increase in the contact angle was observed in the PCL/MMT(PCL-b-DEAEMA) nanocomposites with respect to PCL. The AFM analysis showed that the surface of the nanocomposites became rougher with respect to the PCL when MMTk10 or MMT(PCL-b-DEAEMA) was incorporated, and the value increased with the clay content. The antimicrobial activity of the nanocomposites against B. subtilis and P. putida was tested. It is remarkable that the biodegradation of PCL/MMT(PCL-b-DEAEMA) nanocomposites, monitored by the production of carbon dioxide and by chemiluminescence emission, was inhibited or retarded with respect to the PCL and PCL/1-MMTk10. It would indicate that nature of organomodifier in the clay play an important role in B. subtilis and P. putida adhesion processes. Biocompatibility studies demonstrate that both PCL and PCL/MMT materials allow the culture of murine L929 fibroblasts on its surface with high viability, very low apoptosis, and without plasma membrane damage, making these materials very adequate for tissue engineering.
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Affiliation(s)
- T Corrales
- Polymer Photochemistry Group, Instituto de Ciencia y Tecnología de Polímeros, C.S.I.C. Juan de la Cierva 3, 28006 Madrid, Spain.
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Haloi DJ, Ata S, Singha NK, Jehnichen D, Voit B. Acrylic AB and ABA block copolymers based on poly(2-ethylhexyl acrylate) (PEHA) and poly(methyl methacrylate) (PMMA) via ATRP. ACS APPLIED MATERIALS & INTERFACES 2012; 4:4200-4207. [PMID: 22834708 DOI: 10.1021/am300915j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Acrylic block copolymers have several advantages over conventional styrenic block copolymers, because of the presence of a saturated backbone and polar pendant groups. This investigation reports the preparation and characterization of di- and triblock copolymers (AB and ABA types) of 2-ethylhexyl acrylate (EHA) and methyl methacrylate (MMA) via atom transfer radical polymerization (ATRP). A series of block copolymers, PEHA-block-PMMA(AB diblock) and PMMA-block-PEHA-block-PMMA(ABA triblock) were prepared via ATRP at 90 °C using CuBr as catalyst in combination with N,N,N',N″,N″-pentamethyl diethylenetriamine (PMDETA) as ligand and acetone as additive. The chemical structure of the macroinitiators and molar composition of block copolymers were characterized by (1)H NMR analysis, and molecular weights of the polymers were analyzed by GPC analysis. DSC analysis showed two glass transition temperatures (T(g)), indicating formation of two domains, which was corroborated by AFM analysis. Small-angle X-ray scattering (SAXS) analysis of AB and ABA block copolymers showed scattering behavior inside the measuring limits indicating nanophase separation. However, SAXS pattern of AB diblock copolymers indicated general phase separation only, whereas for ABA triblock copolymer an ordered or mixed morphology could be deduced, which is assumed to be the reason for the better mechanical properties achieved with ABA block copolymers than with the AB analogues.
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Affiliation(s)
- Dhruba J Haloi
- Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur-721302, India
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Xu L, Shao L, Hu M, Chen L, Bi Y. A thermoresponsive amphiphilic dendron — Synthesis, characterization, and self-assembled micelles for controlled drug release. CAN J CHEM 2012. [DOI: 10.1139/v2012-038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
A new third-generation thermoresponsive amphiphilic dendron consisting of a hydrophobic poly(benzyl ether) dendritic core and hydrophilic oligo(ethylene glycol) peripheries was synthesized by an efficient convergent approach. Its structure was confirmed by 1H NMR, 13C NMR, IR, GPC, MALDI-TOF MS, and elemental analysis. Turbidity and dynamic light scattering (DLS) measurements demonstrated that the dendron showed a reversible temperature-dependent phase-transition behavior in aqueous solution and its lower critical solution temperature (LCST) was lower than that of the corresponding second-generation dendron, indicating the dependence of LCSTs on the generation of dendrons. Fluorescent spectroscopy and TEM studies revealed that the dendron would self-assemble into nanospherical micelles with a very low critical micelle concentration (CMC) in water. The core-shell structure of the micelles was proved by 1H NMR analyses of the micelles in D2O. The drug-loading capacity of the dendron micelles is about 29 wt % for podophyllotoxin (POD) used as a model drug, and in vitro release tests showed a desired thermoresponsive drug-release behavior. These results indicate that the dendron is promising as stimuli-responsive material for biomedical applications.
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Affiliation(s)
- Li Xu
- Yunnan Normal University, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, P.R. China
| | - Lidong Shao
- Yunnan Normal University, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, P.R. China
| | - Minqi Hu
- Yunnan Normal University, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, P.R. China
| | - Lin Chen
- Yunnan Normal University, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, P.R. China
| | - Yunmei Bi
- Yunnan Normal University, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650092, P.R. China
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López-Donaire ML, Sussman EM, Fernández-Gutiérrez M, Méndez-Vilas A, Ratner BD, Vázquez-Lasa B, San Román J. Amphiphilic Self-Assembled “Polymeric Drugs”: Morphology, Properties, and Biological Behavior of Nanoparticles. Biomacromolecules 2012; 13:624-35. [DOI: 10.1021/bm300043f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- María Luisa López-Donaire
- Institute of Polymer Science and Technology, CSIC, C/Juan de la Cierva 3,
28006 Madrid, Spain
- CIBER-BBN, Ebro River Campus, Building R&D, Block 5, Floor 1, Poeta Mariano Esquillor s/n, 50017 Zaragoza, Spain
| | - Eric M. Sussman
- Department of Bioengineering, University of Washington, Seattle, Washington
98195-5061, United States
| | - Mar Fernández-Gutiérrez
- Institute of Polymer Science and Technology, CSIC, C/Juan de la Cierva 3,
28006 Madrid, Spain
- CIBER-BBN, Ebro River Campus, Building R&D, Block 5, Floor 1, Poeta Mariano Esquillor s/n, 50017 Zaragoza, Spain
| | - Antonio Méndez-Vilas
- CIBER-BBN, Ebro River Campus, Building R&D, Block 5, Floor 1, Poeta Mariano Esquillor s/n, 50017 Zaragoza, Spain
| | - Buddy D. Ratner
- Department of Bioengineering, University of Washington, Seattle, Washington
98195-5061, United States
| | - Blanca Vázquez-Lasa
- Institute of Polymer Science and Technology, CSIC, C/Juan de la Cierva 3,
28006 Madrid, Spain
- CIBER-BBN, Ebro River Campus, Building R&D, Block 5, Floor 1, Poeta Mariano Esquillor s/n, 50017 Zaragoza, Spain
| | - Julio San Román
- Institute of Polymer Science and Technology, CSIC, C/Juan de la Cierva 3,
28006 Madrid, Spain
- CIBER-BBN, Ebro River Campus, Building R&D, Block 5, Floor 1, Poeta Mariano Esquillor s/n, 50017 Zaragoza, Spain
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Shi X, Zhao Y, Gao H, Zhang L, Zhu F, Wu Q. Synthesis of Hyperbranched Polyethylene Amphiphiles by Chain Walking Polymerization in Tandem with RAFT Polymerization and Supramolecular Self-Assembly Vesicles. Macromol Rapid Commun 2012; 33:374-9. [DOI: 10.1002/marc.201100825] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Indexed: 11/12/2022]
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41
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Bailly N, Pound-Lana G, Klumperman B. Synthesis, Characterization, and Self-Assembly of Poly(N-vinylpyrrolidone)-block-poly(vinyl acetate). Aust J Chem 2012. [DOI: 10.1071/ch12185] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Poly(N-vinylpyrrolidone)-block-poly(vinyl acetate) (PVP-b-PVAc) block copolymers of varying molar mass and hydrophobic block lengths were synthesized by xanthate-mediated radical polymerization. In order to control the molar mass of the hydrophilic PVP block, a xanthate chain transfer agent, S-(2-cyano-2-propyl) O-ethyl xanthate, was used. The PVP-b-PVAc block copolymer is composed of a hydrophilic and hydrophobic segment, and has the ability to self-assemble in aqueous solution. The PVP-b-PVAc block copolymers were characterized by 1H NMR spectroscopy to confirm their self-assembly in water. The critical micelle concentration was determined by fluorescence spectroscopy. A combination of dynamic light scattering, transmission electron microscopy, and static light scattering was used to further characterize the self-assembly of the block copolymers in water.
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Chen D, Liang H, Yang Y, Yuan Z, Ding P, Deng Y. Effects of pH-Sensitive Groups on Poly(ethylene oxide)-block
-poly(ϵ-caprolactone) Block Copolymer Micelles Used as Drug Carriers. MACROMOL CHEM PHYS 2011. [DOI: 10.1002/macp.201100351] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Dutta P, Dey J, Perumal V, Mandal M. Amino acid based amphiphilic copolymer micelles as carriers of non-steroidal anti-inflammatory drugs: Solubilization, in vitro release and biological evaluation. Int J Pharm 2011; 407:207-16. [DOI: 10.1016/j.ijpharm.2011.01.041] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Revised: 01/18/2011] [Accepted: 01/19/2011] [Indexed: 11/17/2022]
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45
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Zhang H, Sun B, Chen Y, Wang J. Synthesis of Y-shaped poly(N
,N
-dimethylamino-2-ethyl methacrylate) and poly(trimethylene carbonate) from a new heterofunctional initiator. POLYM ENG SCI 2011. [DOI: 10.1002/pen.21883] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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46
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Luzón M, Corrales T, Catalina F, San Miguel V, Ballesteros C, Peinado C. Hierarchically organized micellization of thermoresponsive rod-coil copolymers based on poly[oligo(ethylene glycol) methacrylate] and poly(ε-caprolactone). ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24261] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Guzmán E, San Miguel V, Peinado C, Ortega F, Rubio RG. Polyelectrolyte multilayers containing triblock copolymers of different charge ratio. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:11494-11502. [PMID: 20446744 DOI: 10.1021/la101043z] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Multilayers formed by the sodium salt of poly(4-styrenesulfonate), PSS, and triblock copolymers of the form PDMAEMA-PCL-PDMAEMA (PDMAEMA corresponding to poly[2-(N,N-dimethylamino)ethyl methacrylate), and PCL to poly(epsilon-caprolactone) have been built by layer-by-layer self-assembly from the aqueous polyelectrolyte solutions. Two types of block copolymers have been used which differ on the type of the amino groups, either hydrochloride or quaternized. This leads to changes in the charge density of the chains for the same content of amino groups. The growth of the multilayers has been followed using dissipative quartz crystal microbalance and ellipsometry techniques. The results show that, independently of the conditions used in the assembling, the film thickness grows linearly with the number of layers. The comparison of the thickness values obtained from D-QCM and ellipsometry has allowed us to calculate the water content of the polymer film. The analysis of the D-QCM data also provides the shear modulus, whose values are typical of a rubber-like polymer system. The analysis of the mass adsorbed calculated by the ellipsometric measurements indicated that the nature of the charge compensation mechanism is extrinsic for all the studied systems, although the degree of extrinsic compensation is strongly dependent on the copolymer used and the concentration in solution. Finally, it was found that the adsorption kinetic of the layers is bimodal for all the films built. Even though the characteristic adsorption times depend on the specific copolymer used, no dependence on the number of layers has been found for a given multilayer.
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Affiliation(s)
- Eduardo Guzmán
- Departamento de Química Física I, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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Li J, Ren J, Cao Y, Yuan W. Synthesis of biodegradable pentaarmed star-block copolymers via an asymmetric BIS-TRIS core by combination of ROP and RAFT: From star architectures to double responsive micelles. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.01.037] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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49
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Huang Y, Li L, Fang Y. Self-assembled particles of N-phthaloylchitosan-g-polycaprolactone molecular bottle brushes as carriers for controlled release of indometacin. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:557-565. [PMID: 19784761 DOI: 10.1007/s10856-009-3880-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Accepted: 09/17/2009] [Indexed: 05/28/2023]
Abstract
A series of amphiphilic N-phthaloylchitosan-g-polycaprolactone molecular bottle brushes were prepared by "graft onto" method. The narrow distribution of polycaprolactone macromonomers ensures that the molecular bottle brushes can self-assemble into highly monodisperse particles, which have the ability to get a high loading efficiency of the hydrophobic drug, indometacin (INN). Searching for the effective drug loading ratio, three parameters such as polycaprolactone chain length, the grafting content and concentration of the molecular bottle brushes were tested to entrap INN. These encapsulated drug particles show sustained release of the encapsulated INN, of which 91.7% was released in 22 h at 37 degrees C in phosphate buffered saline. The self-assembled particles of the molecular bottle brushes as carriers for INN can effectively prevent the drug from releasing quickly and prolong the release time, which is a promising candidate for potential clinical applications.
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Affiliation(s)
- Youju Huang
- National Synchrotron Radiation Lab and College of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230026, People's Republic of China
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Kita-Tokarczyk K, Itel F, Grzelakowski M, Egli S, Rossbach P, Meier W. Monolayer interactions between lipids and amphiphilic block copolymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:9847-9856. [PMID: 19705885 DOI: 10.1021/la900948a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Interactions in binary mixed monolayers from lipids 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) and amphiphilic poly(2-methyloxazoline)-block-poly(dimethylsiloxane)-block-poly(2-methyloxazoline) block copolymers were studied by using the Langmuir balance technique and Brewster angle microscopy. It is shown that monolayers from the saturated lipid (DPPC) are more sensitive to the presence of polymers in the film, resulting in phase separation and the formation of pure lipid domains at high surface pressure. The morphology and composition of such phase-separated lipid-polymer films were studied by fluorescence microscopy and ToF-SIMS. In contrast, in DOPC-containing monolayers, the polymers tend to phase-separate at low surface pressures only and homogeneous films are obtained upon further compression, due to higher lipid fluidity. The analysis of excess energy of mixing shows that while the separation effect in densely packed DPPC-containing films is strongly dependent on the polymer size (with the larger polymer having a much stronger influence), in the case of monolayers with DOPC much smaller effects are observed. The results are discussed in terms of the monolayer composition, lipid fluidity, and polymer size.
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