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Pal J, Kola P, Samanta P, Mandal M, Dhara D. Polymer Nanoparticles for Preferential Delivery of Drugs Only by Exploiting the Slightly Elevated Temperature of Cancer Cells and Real-Time Monitoring of Drug Release. Biomacromolecules 2024. [PMID: 38943659 DOI: 10.1021/acs.biomac.4c00572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/01/2024]
Abstract
Rapid proliferation and a faster rate of glycolysis in cancer cells often result in an elevated local temperature (40-43 °C) at the tumor site. Nanoparticles prepared from polymers with two lower critical solution temperatures (LCSTs) can be utilized to take advantage of this subtle temperature elevation to deliver anticancer drugs preferably to the cancer cells, thereby enhancing the overall therapeutic efficacy and reducing side effects. In this direction, we synthesized N-vinyl-2-pyrrolidone (NVP) and substituted NVP (sub-NVP: C2-NVP, C4-NVP)-based polymers with precisely controlled LCSTs by varying the ratio of NVP and sub-NVP. The first LCST (LCST1) was kept below 37 °C to promote self-assembly, drug loading, and structural stability in physiological conditions and the second LCST (LCST2) was in the range of 40-43 °C to ensure mild hyperthermia-induced drug release. Additionally, covalent attachment of tetraphenylethylene (TPE, AIEgen) resulted in aggregation-induced emission in thermoresponsive micellar nanoparticles in which TPE acted as a Förster Resonance Energy Transfer (FRET) pair with the loaded anticancer drug doxorubicin (DOX). Tracking of FRET-induced fluorescence recovery of TPE molecules was utilized to confirm the real-time thermoresponsive release of DOX from nanoparticles and eventual localization of TPE in the cytoplasm and DOX in the nucleus. In vitro cellular studies such as cytotoxicity, cellular uptake, and thermoresponsive drug release showed that the DOX-loaded polymeric nanoparticles were nontoxic to normal cells (HEK-293) but significantly more effective in cancer cells (MCF-7) at 40 °C. To our knowledge, this is the first report of preferential delivery of anticancer drugs only by exploiting the slightly elevated temperature of cancer cells.
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2
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Wu X, Barner-Kowollik C. Fluorescence-readout as a powerful macromolecular characterisation tool. Chem Sci 2023; 14:12815-12849. [PMID: 38023522 PMCID: PMC10664555 DOI: 10.1039/d3sc04052f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Accepted: 10/10/2023] [Indexed: 12/01/2023] Open
Abstract
The last few decades have witnessed significant progress in synthetic macromolecular chemistry, which can provide access to diverse macromolecules with varying structural complexities, topology and functionalities, bringing us closer to the aim of controlling soft matter material properties with molecular precision. To reach this goal, the development of advanced analytical techniques, allowing for micro-, molecular level and real-time investigation, is essential. Due to their appealing features, including high sensitivity, large contrast, fast and real-time response, as well as non-invasive characteristics, fluorescence-based techniques have emerged as a powerful tool for macromolecular characterisation to provide detailed information and give new and deep insights beyond those offered by commonly applied analytical methods. Herein, we critically examine how fluorescence phenomena, principles and techniques can be effectively exploited to characterise macromolecules and soft matter materials and to further unravel their constitution, by highlighting representative examples of recent advances across major areas of polymer and materials science, ranging from polymer molecular weight and conversion, architecture, conformation to polymer self-assembly to surfaces, gels and 3D printing. Finally, we discuss the opportunities for fluorescence-readout to further advance the development of macromolecules, leading to the design of polymers and soft matter materials with pre-determined and adaptable properties.
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Affiliation(s)
- Xingyu Wu
- School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
| | - Christopher Barner-Kowollik
- School of Chemistry and Physics, Centre for Materials Science, Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
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3
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Kumar D, Dua K, Tiwari S. Localized Delivery of Bioactives using Structured Liposomal Gels. Curr Pharm Des 2023; 29:3206-3220. [PMID: 37974442 DOI: 10.2174/0113816128263001231102053654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 10/03/2023] [Indexed: 11/19/2023]
Abstract
Liposomes have gained a lot of interest for drug delivery applications, and some of these preparations have been commercialized. These are formulated with biocompatible components and can be used for delivering a wide range of payloads differing in aqueous solubility and molecular weight. Liposome-based delivery approaches are limited mainly by two factors: (a) poor dispersion stability, and (b) pre-mature leakage of payloads. In this review, we have discussed the stabilization of liposomal vesicles by their entrapment in hydrogels. Studies reveal that such hydrogels can maintain the structural integrity of liposomes. Release of liposomes from the hydrogel network can be modulated through careful screening of matrix former and degree of its cross-linking. Accordingly, we have reviewed the approaches of stabilizing liposomal vesicles through entrapment in hydrogels. Application of liposome-embedded hydrogels has been reviewed in context of localized drug delivery. Our discussion is focussed on the delivery of bioactives to the skin. Such an approach appears alluring from the standpoint of minimizing the undesirable distribution of payload(s) the systemic circulation and off-target sites.
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Affiliation(s)
- Deepak Kumar
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow 226002, India
| | - Kamal Dua
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, New South Wales 2007, Australia
| | - Sanjay Tiwari
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow 226002, India
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4
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Valdez S, Robertson M, Qiang Z. Fluorescence Resonance Energy Transfer Measurements in Polymer Science: A Review. Macromol Rapid Commun 2022; 43:e2200421. [PMID: 35689335 DOI: 10.1002/marc.202200421] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 06/06/2022] [Indexed: 12/27/2022]
Abstract
Fluorescence resonance energy transfer (FRET) is a non-invasive characterization method for studying molecular structures and dynamics, providing high spatial resolution at nanometer scale. Over the past decades, FRET-based measurements are developed and widely implemented in synthetic polymer systems for understanding and detecting a variety of nanoscale phenomena, enabling significant advances in polymer science. In this review, the basic principles of fluorescence and FRET are briefly discussed. Several representative research areas are highlighted, where FRET spectroscopy and imaging can be employed to reveal polymer morphology and kinetics. These examples include understanding polymer micelle formation and stability, detecting guest molecule release from polymer host, characterizing supramolecular assembly, imaging composite interfaces, and determining polymer chain conformations and their diffusion kinetics. Finally, a perspective on the opportunities of FRET-based measurements is provided for further allowing their greater contributions in this exciting area.
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Affiliation(s)
- Sara Valdez
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Mark Robertson
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
| | - Zhe Qiang
- School of Polymer Science and Engineering, University of Southern Mississippi, Hattiesburg, MS, 39406, USA
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5
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Gao M, Du N, Yao Z, Li Y, Chen N, Hou W. Vesicle formation of single-chain amphiphilic 4-dodecylbenzene sulfonic acid in water and micelle-to-vesicle transition induced by wet-dry cycles. SOFT MATTER 2021; 17:2490-2499. [PMID: 33503106 DOI: 10.1039/d0sm02229b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Simple single-chain amphiphiles (SCAs) can form vesicular structures in their single-component aqueous solutions, which has attracted great attention, but the understanding of their aggregation behavior is still limited. In this work, the aggregation behavior of 4-dodecylbenzene sulfonic acid (DBSA), a typical simple SCA, in water was investigated. The structure and properties of the aggregates formed were determined. In particular, the effect of wet-dry cycles on the structures of aggregates was examined. The mechanisms of aggregate formation and structural transition were discussed. It was found that the increase of DBSA concentration can drive the occurrence of a micelle-to-vesicle transition, showing a critical micelle concentration and critical vesicle concentration of ∼0.53 and 2.14 mM, respectively. The vesicles formed coexist with micelles in solution, with a unilamellar structure and ∼80 nm size, and exhibit size-selective permeability. In addition, the vesicles show remarkable stability upon long-term storage, exposure to high temperature, and freeze-thaw cycles. The H-bonding interaction between DBSA species and the interdigitated structure of alkyl chains in bilayers play a key role in the formation and stability of DBSA vesicles. Interestingly, it was found that the wet-dry cycle can induce a micelle-to-vesicle transition and an obvious increase in the size of the original vesicles, accompanied by the formation of some multilamellar vesicles. This work provides a better understanding of the aggregation behavior of simple SCAs in their single-component aqueous solutions.
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Affiliation(s)
- Meihua Gao
- Key Laboratory of Colloid & Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China.
| | - Na Du
- Key Laboratory of Colloid & Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China.
| | - Zhiyin Yao
- Key Laboratory of Colloid & Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China.
| | - Ying Li
- Key Laboratory of Colloid & Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China.
| | - Nan Chen
- Key Laboratory of Colloid & Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China.
| | - Wanguo Hou
- Key Laboratory of Colloid & Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, China. and National Engineering Technology Research Center of Colloidal Materials, Shandong University, Jinan 250100, P. R. China
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Zhang J, Farias‐Mancilla B, Kulai I, Hoeppener S, Lonetti B, Prévost S, Ulbrich J, Destarac M, Colombani O, Schubert US, Guerrero‐Sanchez C, Harrisson S. Effect of Hydrophilic Monomer Distribution on Self-Assembly of a pH-Responsive Copolymer: Spheres, Worms and Vesicles from a Single Copolymer Composition. Angew Chem Int Ed Engl 2021; 60:4925-4930. [PMID: 32997426 PMCID: PMC7984367 DOI: 10.1002/anie.202010501] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/24/2020] [Indexed: 11/22/2022]
Abstract
A series of copolymers containing 50 mol % acrylic acid (AA) and 50 mol % butyl acrylate (BA) but with differing composition profiles ranging from an AA-BA diblock copolymer to a linear gradient poly(AA-grad-BA) copolymer were synthesized and their pH-responsive self-assembly behavior was investigated. While assemblies of the AA-BA diblock copolymer were kinetically frozen, the gradient-like compositions underwent reversible changes in size and morphology in response to changes in pH. In particular, a diblock copolymer consisting of two random copolymer segments of equal length (16 mol % and 84 mol % AA content, respectively) formed spherical micelles at pH >5, a mix of spherical and wormlike micelles at pH 5 and vesicles at pH 4. These assemblies were characterized by dynamic light scattering, cryo-transmission electron microscopy and small angle neutron scattering.
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Affiliation(s)
- Junliang Zhang
- Shaanxi Key Laboratory of Macromolecular Science and TechnologySchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'anShaanxi710072P. R. China
- Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM)Friedrich Schiller University of JenaHumboldtstrasse 10 (IOMC) and Philosophenweg 7 (JCSM)07743JenaGermany
| | | | - Ihor Kulai
- IMRCP UMR5623Université de Toulouse118, route de Narbonne31062Toulouse Cedex 9France
| | - Stephanie Hoeppener
- Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM)Friedrich Schiller University of JenaHumboldtstrasse 10 (IOMC) and Philosophenweg 7 (JCSM)07743JenaGermany
| | - Barbara Lonetti
- IMRCP UMR5623Université de Toulouse118, route de Narbonne31062Toulouse Cedex 9France
| | | | - Jens Ulbrich
- Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM)Friedrich Schiller University of JenaHumboldtstrasse 10 (IOMC) and Philosophenweg 7 (JCSM)07743JenaGermany
| | - Mathias Destarac
- IMRCP UMR5623Université de Toulouse118, route de Narbonne31062Toulouse Cedex 9France
| | - Olivier Colombani
- Institut des Molécules et Matériaux du Mans (IMMM)UMR 6283 CNRSLe Mans Université/ CNRSAvenue Olivier Messiaen72085Le Mans Cedex 9France
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM)Friedrich Schiller University of JenaHumboldtstrasse 10 (IOMC) and Philosophenweg 7 (JCSM)07743JenaGermany
| | - Carlos Guerrero‐Sanchez
- Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM)Friedrich Schiller University of JenaHumboldtstrasse 10 (IOMC) and Philosophenweg 7 (JCSM)07743JenaGermany
| | - Simon Harrisson
- LCPO UMR 5629Université Bordeaux/ CNRS/ Ecole Nationale Supérieure de Chimie, de Biologie & de Physique16 Avenue Pey-Berland33607Pessac CedexFrance
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Zhang J, Farias‐Mancilla B, Kulai I, Hoeppener S, Lonetti B, Prévost S, Ulbrich J, Destarac M, Colombani O, Schubert US, Guerrero‐Sanchez C, Harrisson S. Einfluss der Verteilung hydrophiler Monomere auf die Selbstassemblierung eines pH‐responsiven Copolymers: Kugeln, Würmer und Vesikel aus einer einzigen Copolymerkomposition. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202010501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Junliang Zhang
- Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi'an Shaanxi 710072 P. R. China
- Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM) Friedrich Schiller University of Jena Humboldtstrasse 10 (IOMC) and Philosophenweg 7 (JCSM) 07743 Jena Deutschland
| | - Barbara Farias‐Mancilla
- IMRCP UMR5623 Université de Toulouse 118, route de Narbonne 31062 Toulouse Cedex 9 Frankreich
| | - Ihor Kulai
- IMRCP UMR5623 Université de Toulouse 118, route de Narbonne 31062 Toulouse Cedex 9 Frankreich
| | - Stephanie Hoeppener
- Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM) Friedrich Schiller University of Jena Humboldtstrasse 10 (IOMC) and Philosophenweg 7 (JCSM) 07743 Jena Deutschland
| | - Barbara Lonetti
- IMRCP UMR5623 Université de Toulouse 118, route de Narbonne 31062 Toulouse Cedex 9 Frankreich
| | - Sylvain Prévost
- Institut Laue-Langevin 71 Avenue des Martyrs Grenoble Frankreich
| | - Jens Ulbrich
- Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM) Friedrich Schiller University of Jena Humboldtstrasse 10 (IOMC) and Philosophenweg 7 (JCSM) 07743 Jena Deutschland
| | - Mathias Destarac
- IMRCP UMR5623 Université de Toulouse 118, route de Narbonne 31062 Toulouse Cedex 9 Frankreich
| | - Olivier Colombani
- IMMM UMR6283 Université du Maine – UFR Sciences et Techniques Avenue Olivier Messiaen 72085 Le Mans Cedex 9 Frankreich
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM) Friedrich Schiller University of Jena Humboldtstrasse 10 (IOMC) and Philosophenweg 7 (JCSM) 07743 Jena Deutschland
| | - Carlos Guerrero‐Sanchez
- Laboratory of Organic and Macromolecular Chemistry (IOMC) and Jena Center for Soft Matter (JCSM) Friedrich Schiller University of Jena Humboldtstrasse 10 (IOMC) and Philosophenweg 7 (JCSM) 07743 Jena Deutschland
| | - Simon Harrisson
- LCPO UMR 5629 Université Bordeaux/ CNRS/ Ecole Nationale Supérieure de Chimie, de Biologie & de Physique 16 Avenue Pey-Berland 33607 Pessac Cedex Frankreich
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8
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He C, Zhang Z, Ding Y, Xue K, Wang X, Yang R, An Y, Liu D, Hu C, Tang Q. LRP1-mediated pH-sensitive polymersomes facilitate combination therapy of glioblastoma in vitro and in vivo. J Nanobiotechnology 2021; 19:29. [PMID: 33482822 PMCID: PMC7821499 DOI: 10.1186/s12951-020-00751-x] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 12/08/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Glioblastoma (GBM) is the most invasive primary intracranial tumor, and its effective treatment is one of the most daunting challenges in oncology. The blood-brain barrier (BBB) is the main obstacle that prevents the delivery of potentially active therapeutic compounds. In this study, a new type of pH-sensitive polymersomes has been designed for glioblastoma therapy to achieve a combination of radiotherapy and chemotherapy for U87-MG human glioblastoma xenografts in nude mice and significantly increased survival time. RESULTS The Au-DOX@PO-ANG has a good ability to cross the blood-brain barrier and target tumors. This delivery system has pH-sensitivity and the ability to respond to the tumor microenvironment. Gold nanoparticles and doxorubicin are designed as a complex drug. This type of complex drug improve the radiotherapy (RT) effect of glioblastoma. The mice treated with Au-DOX@PO-ANG NPs have a significant reduction in tumor volume. CONCLUSION In summary, a new pH-sensitive drug delivery system was fabricated for the treatment of glioblastoma. The new BBB-traversing drug delivery system potentially represents a novel approach to improve the effects of the treatment of intracranial tumors and provides hope for glioblastoma treatment.
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Affiliation(s)
- Chen He
- Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing, China
| | - Zhiyuan Zhang
- Department of Neurosurgery, Nanjing Jinling Hospital, Nanjing University, Nanjing, China
| | - Yinan Ding
- Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing, China
| | - Kangli Xue
- Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing, China
| | - Xihui Wang
- Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing, China
| | - Rui Yang
- Research Institute for Reproductive Health and Genetic Diseases, The Affiliated Wuxi Maternity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Yanli An
- Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing, China
| | - Dongfang Liu
- Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing, China
| | - Chunmei Hu
- Department of Tuberculosis, the Second Affiliated Hospital of Southeast University, Nanjing, China.
| | - Qiusha Tang
- Medical School of Southeast University, 87 Dingjiaqiao Road, Nanjing, China.
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Zheng Y, Weng C, Cheng C, Zhao J, Yang R, Zhang Q, Ding M, Tan H, Fu Q. Multiblock Copolymers toward Segmentation-Driven Morphological Transition. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00374] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yi Zheng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Chuang Weng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Cheng Cheng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Jinling Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Rui Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Qin Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Mingming Ding
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Hong Tan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
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11
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Parikh K, Singh S, Kumar S. Self assembly in an aqueous gemini surfactant containing sugar based (isosorbide) spacer. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.01.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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12
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Samanta P, Kapat K, Maiti S, Biswas G, Dhara S, Dhara D. pH-labile and photochemically cross-linkable polymer vesicles from coumarin based random copolymer for cancer therapy. J Colloid Interface Sci 2019; 555:132-144. [DOI: 10.1016/j.jcis.2019.07.069] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 12/22/2022]
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13
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Yang W, Shen Y, Zhang D, Li C, Yuan R, Xu W. Programmed Dual-Functional DNA Tweezer for Simultaneous and Recognizable Fluorescence Detection of microRNA and Protein. Anal Chem 2019; 91:7782-7789. [DOI: 10.1021/acs.analchem.9b01266] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Wenting Yang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Yu Shen
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Danyang Zhang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Chong Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
| | - Wenju Xu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China
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14
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Feng J, Wen W, Jia YG, Liu S, Guo J. pH-Responsive Micelles Assembled by Three-Armed Degradable Block Copolymers with a Cholic Acid Core for Drug Controlled-Release. Polymers (Basel) 2019; 11:E511. [PMID: 30960495 PMCID: PMC6473676 DOI: 10.3390/polym11030511] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 03/13/2019] [Accepted: 03/14/2019] [Indexed: 02/06/2023] Open
Abstract
One of the most famous anticancer drugs, paclitaxel (PTX), has often been used in drug controlled-release studies. The polymers derived from bio-compound bile acids and degradable poly(ε-caprolactone) (PCL) form a reservoir and have been used as a drug delivery system with great advantages. Herein, we grafted poly(N,N-diethylaminoethyl methacrylate) and poly(poly(ethylene glycol) methyl ether methacrylate) into the bile acid-derived three-armed macroinitiator CA-(PCL)₃, resulting in the amphiphilic block copolymers CA-(PCL-b-PDEAEMA-b-PPEGMA)₃. These pH-responsive three-armed block copolymers self-assembled into micelles in aqueous solution and PTX was encapsulated into the micellar core to form PTX-loaded micelles with a drug loading of 29.92 wt %. The micelles were stable in PBS at pH 7.4 and showed a pH-triggered release behavior of PTX under acidic environments, in which 55% of PTX was released at pH 5.0 in 80 h. These cholic acid-based functionalized three-armed block polymers present good biocompatibility, showing great potential for drug controlled-release.
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Affiliation(s)
- Jingjie Feng
- School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
| | - Weiqiu Wen
- School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
| | - Yong-Guang Jia
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Sa Liu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China.
| | - Jianwei Guo
- School of Chemical Engineering & Light Industry, Guangdong University of Technology, Guangzhou 510006, China.
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15
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Konishcheva EV, Daubian D, Rigo S, Meier WP. Probing membrane asymmetry of ABC polymersomes. Chem Commun (Camb) 2019; 55:1148-1151. [DOI: 10.1039/c8cc09659g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the sensitivity of the membrane asymmetry of ABC (PEO-b-PCL-b-PMOXA) polymersomes towards the end-group modification of a shorter C block.
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Affiliation(s)
- Evgeniia V. Konishcheva
- Department of Physical Chemistry
- University of Basel, Mattenstrasse 24a
- 4058 Basel
- Switzerland
- Precision Macromolecular Chemistry
| | - Davy Daubian
- Department of Physical Chemistry
- University of Basel, Mattenstrasse 24a
- 4058 Basel
- Switzerland
| | - Serena Rigo
- Department of Physical Chemistry
- University of Basel, Mattenstrasse 24a
- 4058 Basel
- Switzerland
| | - Wolfgang P. Meier
- Department of Physical Chemistry
- University of Basel, Mattenstrasse 24a
- 4058 Basel
- Switzerland
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16
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Maiti C, Parida S, Kayal S, Maiti S, Mandal M, Dhara D. Redox-Responsive Core-Cross-Linked Block Copolymer Micelles for Overcoming Multidrug Resistance in Cancer Cells. ACS APPLIED MATERIALS & INTERFACES 2018; 10:5318-5330. [PMID: 29355017 DOI: 10.1021/acsami.7b18245] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Success of chemotherapy as a treatment for cancer has been often inhibited by multidrug resistance (MDR) of the cancer cells. There is a clear need to generate strategies to overcome this resistance. In this work, we have developed redox-responsive and core-cross-linked micellar nanocarriers using poly(ethylene glycol)-block-poly(2-(methacryloyloxy)ethyl 5-(1,2-dithiolan-3-yl)pentanoate) diblock copolymers (PEG-b-PLAHEMA) with tunable swelling properties for the delivery of drugs toward drug-sensitive MDA-MB-231 and drug-resistant MDA-MB-231 (231R) cancer cells. PEG-b-PLAHEMA containing varying number of 2-(methacryloyloxy)ethyl 5-(1,2-dithiolan-3-yl)pentanoate (LAHEMA) units were synthesized by employing the reversible addition-fragmentation chain transfer polymerization technique. The block copolymer self-assembly, cross-linking induced by reduction, and de-cross-linking triggered time-dependent controlled swelling of micelles were studied using dynamic light scattering, fluorescence spectroscopy, and transmission electron microscopy. In vitro cytotoxicity, cellular uptake efficiency, and glutathione-responsive anticancer activity of doxorubicin (DOX) encapsulated in core-cross-linked block copolymer micelles (CCMs) toward both drug-sensitive and drug-resistant cancer cell lines were evaluated. Significant reduction in IC50 was observed by DOX-loaded CCMs toward drug-resistant 231R cancer cell lines, which was further improved by coencapsulating DOX and verapamil (a P-glycoprotein inhibitor) in CCMs. Thus, these reduction-sensitive biocompatible CCMs with tunable swelling property are very promising in overcoming MDR in cancer cells.
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Affiliation(s)
- Chiranjit Maiti
- Department of Chemistry and ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , Kharagpur, West Bengal 721302, India
| | - Sheetal Parida
- Department of Chemistry and ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , Kharagpur, West Bengal 721302, India
| | - Shibayan Kayal
- Department of Chemistry and ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , Kharagpur, West Bengal 721302, India
| | - Saikat Maiti
- Department of Chemistry and ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , Kharagpur, West Bengal 721302, India
| | - Mahitosh Mandal
- Department of Chemistry and ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , Kharagpur, West Bengal 721302, India
| | - Dibakar Dhara
- Department of Chemistry and ‡School of Medical Science and Technology, Indian Institute of Technology Kharagpur , Kharagpur, West Bengal 721302, India
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17
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Xu H, Du N, Song Y, Song S, Hou W. Spontaneous vesicle formation and vesicle-to-micelle transition of sodium 2-ketooctanate in water. J Colloid Interface Sci 2018; 509:265-274. [DOI: 10.1016/j.jcis.2017.09.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/06/2017] [Accepted: 09/06/2017] [Indexed: 11/24/2022]
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18
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Lü J, Liu B, Shi B, Lü C. Coordination-induced assemblies of quantum dots in amphiphilic thermo-responsive block copolymer micelles: morphologies, optical properties and applications. Polym Chem 2018. [DOI: 10.1039/c8py00510a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Thermo-responsive dual-emitting QD/BCP assemblies with QDs located in the core (CDMs), shell (SDMs) and the interface (IDMs) between the core and the shell of micelles were constructed via coordination-driven assemblies for the selective detection of TNP and Hg2+ ions.
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Affiliation(s)
- Jianhua Lü
- Institute of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Bingxin Liu
- School of Mechanical Engineering
- Qinghai University
- Xining 810016
- P. R. China
| | - Bingfeng Shi
- Institute of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Changli Lü
- Institute of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
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19
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Gulyani A, Dey N, Bhattacharya S. A unique self-assembly-driven probe for sensing a lipid bilayer: ratiometric probing of vesicle to micelle transition. Chem Commun (Camb) 2018; 54:5122-5125. [DOI: 10.1039/c8cc01635f] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Membrane-driven self-assembly of an amphiphilic pyrene–terpyridine probe efficiently reports on vesicle–micelle transition through ratiometric changes.
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Affiliation(s)
- Akash Gulyani
- Department of Organic Chemistry, Indian Institute of Science
- Bangalore 560012
- India
- Institute for Stem Cell Biology & Regenerative Medicine, GKVK Post Bangalore
- India
| | - Nilanjan Dey
- Department of Organic Chemistry, Indian Institute of Science
- Bangalore 560012
- India
- Institute for Stem Cell Biology & Regenerative Medicine, GKVK Post Bangalore
- India
| | - Santanu Bhattacharya
- Department of Organic Chemistry, Indian Institute of Science
- Bangalore 560012
- India
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20
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Sahoo S, Bera S, Maiti S, Dhara D. Temperature- and Composition-Dependent DNA Condensation by Thermosensitive Block Copolymers. ACS OMEGA 2017; 2:7946-7958. [PMID: 30023568 PMCID: PMC6045361 DOI: 10.1021/acsomega.7b01331] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 11/03/2017] [Indexed: 06/08/2023]
Abstract
Successful intracellular delivery of genes requires an efficient carrier, as genes by themselves cannot diffuse across cell membranes. Because of the toxicity and immunogenicity of viral vectors, nonviral vectors are gaining tremendous interest in research. In this work, we have investigated the temperature-dependent DNA condensation efficiency of various compositions of a thermosensitive block copolymer viz., poly(N-isopropylacrylamide)-b-poly(2-(diethylamino)ethyl methacrylate) (PNIPA-b-PDMAEMA). Three different copolymer compositions of varying molecular weights were successfully synthesized via the RAFT polymerization technique. Steady-state fluorescence and circular dichroism (CD) spectroscopies, dynamic light scattering (DLS) and zeta potential measurements, agarose gel electrophoresis, and atomic force microscopy techniques were utilized to study the interaction of the copolymers with DNA at temperatures above and below the critical aggregation temperature (CAT). All these experiments revealed that, above the CAT, there was formation of highly stable and tight polymer-DNA complexes (polyplexes). The size of polyplexes was dependent on the temperature up to a certain charge ratio, as determined by the DLS results. The results obtained from temperature-dependent fluorescence spectroscopy, CD, and gel electrophoresis indicated that the DNA molecules were shielded more from aqueous exposure above the CAT because of the formation of relatively more compact complexes. The polyplexes also exhibited changes in the particle morphology below and above the CAT, with particles generated above CAT being more spherical in morphology. These results suggested at the possibility of modulating the complex formation by temperature modification. The present biophysical studies would provide new physical insight into the design of novel gene carriers.
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Affiliation(s)
| | | | | | - Dibakar Dhara
- E-mail: , . Phone: +91-3222-282326. Fax: +91-3222-282252 (D.D.)
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21
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Water-soluble nanoparticles from PEGylated linear cationic block copolymers and anionic surfactants. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4236-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Maiti C, Dhara D. Energy-Transfer Phenomena in Thermoresponsive and pH- Switchable Fluorescent Diblock Copolymer Vesicles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:12130-12139. [PMID: 28984463 DOI: 10.1021/acs.langmuir.7b01891] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We describe the development of a polymeric vesicle that not only selectively fluoresces at low pH, a condition prevailing in cancer cells, but also can potentially monitor the thermoresponsive release of a drug even if the drug is nonfluorescent. The developed fluorescence resonance energy transfer (FRET)-based thermoresponsive vesicular nanocarriers are composed of a new poly(PEGMA)-b-poly(NIPA-r-R6GMED) block copolymer, which undergoes pH-switchable superior turn on-off fluorescence characteristics. The block copolymer was synthesized using the RAFT technique, and its solution properties and self-assembly behavior were investigated by turbidity measurements, fluorescence spectroscopy, 1H NMR, dynamic light scattering, and transmission electron microscopy. The block copolymer self-assembled to form nanostructured vesicles above the critical aggregation temperature under physiologically relevant conditions. Steady-state and time-resolved fluorescence spectroscopy were utilized to study the FRET process between encapsulated hydrophobic guest C-153 (donor) and polymer-bound R6GMED units (acceptor) in the thermoresponsive vesicles. The FRET rate and efficiency were found to vary as a result of the pH-dependent changes in the quantum yield of the acceptor molecules. The occurrence of a highly efficient FRET in this polymeric vesicular nanocarrier at acidic pH, a condition similar to the cytoplasm and cell nucleus in leukemic tissues, and the ability to encapsulate hydrophilic and hydrophobic molecules and their temperature-controlled release make it potentially useful in imaging guided real-time monitoring of drug-delivery vehicles.
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Affiliation(s)
- Chiranjit Maiti
- Department of Chemistry, Indian Institute of Technology , Kharagpur, West Bengal 721302, India
| | - Dibakar Dhara
- Department of Chemistry, Indian Institute of Technology , Kharagpur, West Bengal 721302, India
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23
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Biswas G, Jena BC, Maiti S, Samanta P, Mandal M, Dhara D. Photoresponsive Block Copolymer Prodrug Nanoparticles as Delivery Vehicle for Single and Dual Anticancer Drugs. ACS OMEGA 2017; 2:6677-6690. [PMID: 30023528 PMCID: PMC6045338 DOI: 10.1021/acsomega.7b00911] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 09/27/2017] [Indexed: 06/08/2023]
Abstract
In recent decades, drug delivery systems (DDSs) based on polymer nanoparticles have been explored due to their potential to deliver drugs with poor water solubility. Some of the limitations of nanoparticle-based DDSs can be overcome by developing an appropriate polymer prodrug. In this work, poly(NIPA)-b-poly(HMNPPA)-b-poly(PEGMA-stat-BA) was synthesized using reversible addition fragmentation chain transfer polymerization and Chlorambucil (Cbl), an anticancer drug, was conjugated to the copolymer via 3-(3-(hydroxymethyl)-4-nitrophenoxy)propyl acrylate (HMNPPA) units to prepare the prodrug. A few biotin acrylate (BA) units were also incorporated to bring potential targeting capability to the prodrug in the copolymer. This polymer prodrug formed spherical micellar nanoparticles in physiological conditions, which were characterized by dynamic light scattering and transmission electron microscopy measurements. The very low critical aggregation concentration (cac) (0.011 mg/mL) of the prodrug, as measured from Nile Red fluorescence, makes it stable against dilution. The polymer prodrug was shown to release Cbl on photoirradiation by soft UV (λ ≥ 365 nm) and laser (λ = 405 nm) light. The prodrug micellar nanoparticles were capable of encapsulating a second drug (doxorubicin, DOX) in their hydrophobic core. On photoirradiation with UV and laser light of the DOX-loaded nanoparticles, both Cbl and DOX were released. Light-induced breaking of photolabile ester bond resulted in the release of Cbl and caused disruption of the nanoparticles facilitating release of DOX. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay confirmed the nontoxicity of the polymers and effectiveness of the dual drug-loaded micellar nanoparticles toward cancer cells. Confocal microscopy results showed a better cellular internalization capability of the DOX-loaded nanoparticles in cancer cells, possibly due to the presence of cancer cell targeting biotin molecules in the polymer. This new photoresponsive potentially biocompatible and cancer cell-targeted polymer prodrug may be useful for delivery of single and/or multiple hydrophobic drugs.
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Affiliation(s)
- Gargi Biswas
- Department
of Chemistry and School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Bikash Chandra Jena
- Department
of Chemistry and School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Saikat Maiti
- Department
of Chemistry and School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Pousali Samanta
- Department
of Chemistry and School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Mahitosh Mandal
- Department
of Chemistry and School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Dibakar Dhara
- Department
of Chemistry and School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
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24
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Yildirim T, Traeger A, Sungur P, Hoeppener S, Kellner C, Yildirim I, Pretzel D, Schubert S, Schubert US. Polymersomes with Endosomal pH-Induced Vesicle-to-Micelle Morphology Transition and a Potential Application for Controlled Doxorubicin Delivery. Biomacromolecules 2017; 18:3280-3290. [DOI: 10.1021/acs.biomac.7b00931] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Turgay Yildirim
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Anja Traeger
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Pelin Sungur
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Stephanie Hoeppener
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Carolin Kellner
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Ilknur Yildirim
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - David Pretzel
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Stephanie Schubert
- Jena
Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
- Institute
of Pharmacy, Department of Pharmaceutical Technology, Friedrich Schiller University Jena, Otto-Schott-Str. 41, 07745 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory
of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena
Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
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25
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Mable C, Derry MJ, Thompson KL, Fielding LA, Mykhaylyk OO, Armes SP. Time-Resolved SAXS Studies of the Kinetics of Thermally Triggered Release of Encapsulated Silica Nanoparticles from Block Copolymer Vesicles. Macromolecules 2017; 50:4465-4473. [PMID: 28626247 PMCID: PMC5472368 DOI: 10.1021/acs.macromol.7b00475] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 05/17/2017] [Indexed: 02/07/2023]
Abstract
Silica-loaded poly(glycerol monomethacrylate)-poly(2-hydroxypropyl methacrylate) diblock copolymer vesicles are prepared in the form of concentrated aqueous dispersions via polymerization-induced self-assembly (PISA). As the concentration of silica nanoparticles present during the PISA synthesis is increased up to 35% w/w, higher degrees of encapsulation of this component within the vesicles can be achieved. After centrifugal purification to remove excess non-encapsulated silica nanoparticles, SAXS, DCP, and TGA analysis indicates encapsulation of up to hundreds of silica nanoparticles per vesicle. In the present study, the thermally triggered release of these encapsulated silica nanoparticles is examined by cooling to 0 °C for 30 min, which causes in situ vesicle dissociation. Transmission electron microscopy studies confirm the change in diblock copolymer morphology and also enable direct visualization of the released silica nanoparticles. Time-resolved small-angle X-ray scattering is used to quantify the extent of silica release over time. For an initial silica concentration of 5% w/w, cooling induces a vesicle-to-sphere transition with subsequent nanoparticle release. For higher silica concentrations (20 or 30% w/w) cooling only leads to perforation of the vesicle membranes, but silica nanoparticles are nevertheless released through the pores. For vesicles prepared in the presence of 30% w/w silica, the purified silica-loaded vesicles were cooled to 0 °C for 30 min, and SAXS patterns were collected every 15 s. A new SAXS model has been developed to determine both the mean volume fraction of encapsulated silica within the vesicles and the scattering length density. Satisfactory data fits to the experimental SAXS patterns were obtained using this model.
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Affiliation(s)
- Charlotte
J. Mable
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K.
| | - Matthew J. Derry
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K.
| | - Kate L. Thompson
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K.
| | - Lee A. Fielding
- The
School of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | | | - Steven P. Armes
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K.
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26
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Pyne A, Kuchlyan J, Maiti C, Dhara D, Sarkar N. Cholesterol Based Surface Active Ionic Liquid That Can Form Microemulsions and Spontaneous Vesicles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5891-5899. [PMID: 28514858 DOI: 10.1021/acs.langmuir.7b01158] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this article, we have reported the synthesis and physicochemical characterization of a novel l-glycine amino acid derived cholesterol based surface active ionic liquid (SAIL). This SAIL has been explored for the preparation of ionic liquid (IL)-in-oil microemulsions and vesicles. The formation of IL-in-oil microemulsion is characterized by construction of a ternary phase diagram, dynamic light scattering (DLS) measurement, proton nuclear magnetic resonance (1H NMR) study, fluorescence measurement using coumarin 480 (C-480) as a molecular probe, and also by recording the diffusion behavior of the molecular probe rhodamine 6G (R6G) in microemulsion droplets through the fluorescence correlation spectroscopy (FCS) technique. Similarly, the spontaneous vesicle formation from the SAIL in water has been established using DLS, transmission electron microscopy (TEM), cryogenic-transmission electron microscopy (cryo-TEM), field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), FCS, and fluorescence lifetime imaging microscopy (FLIM) measurements. These aggregates may potentially serve as good biomimicking models and possible drug carriers.
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Affiliation(s)
- Arghajit Pyne
- Department of Chemistry, Indian Institute of Technology , Kharagpur 721302, West Bengal, India
| | - Jagannath Kuchlyan
- Department of Chemistry, Indian Institute of Technology , Kharagpur 721302, West Bengal, India
| | - Chiranjit Maiti
- Department of Chemistry, Indian Institute of Technology , Kharagpur 721302, West Bengal, India
| | - Dibakar Dhara
- Department of Chemistry, Indian Institute of Technology , Kharagpur 721302, West Bengal, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology , Kharagpur 721302, West Bengal, India
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27
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Deng R, Derry MJ, Mable CJ, Ning Y, Armes SP. Using Dynamic Covalent Chemistry To Drive Morphological Transitions: Controlled Release of Encapsulated Nanoparticles from Block Copolymer Vesicles. J Am Chem Soc 2017; 139:7616-7623. [PMID: 28497960 PMCID: PMC5465507 DOI: 10.1021/jacs.7b02642] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Indexed: 12/16/2022]
Abstract
Dynamic covalent chemistry is exploited to drive morphological order-order transitions to achieve the controlled release of a model payload (e.g., silica nanoparticles) encapsulated within block copolymer vesicles. More specifically, poly(glycerol monomethacrylate)-poly(2-hydroxypropyl methacrylate) (PGMA-PHPMA) diblock copolymer vesicles were prepared via aqueous polymerization-induced self-assembly in either the presence or absence of silica nanoparticles. Addition of 3-aminophenylboronic acid (APBA) to such vesicles results in specific binding of this reagent to some of the pendent cis-diol groups on the hydrophilic PGMA chains to form phenylboronate ester bonds in mildly alkaline aqueous solution (pH ∼ 10). This leads to a subtle increase in the effective volume fraction of this stabilizer block, which in turn causes a reduction in the packing parameter and hence induces a vesicle-to-worm (or vesicle-to-sphere) morphological transition. The evolution in copolymer morphology (and the associated sol-gel transitions) was monitored using dynamic light scattering, transmission electron microscopy, oscillatory rheology, and small-angle X-ray scattering. In contrast to the literature, in situ release of encapsulated silica nanoparticles is achieved via vesicle dissociation at room temperature; moreover, the rate of release can be fine-tuned by varying the solution pH and/or the APBA concentration. Furthermore, this strategy also works (i) for relatively thick-walled vesicles that do not normally exhibit stimulus-responsive behavior and (ii) in the presence of added salt. This novel molecular recognition strategy to trigger morphological transitions via dynamic covalent chemistry offers considerable scope for the design of new stimulus-responsive copolymer vesicles (and hydrogels) for targeted delivery and controlled release of cargoes. In particular, the conditions used in this new approach are relevant to liquid laundry formulations, whereby enzymes require protection to prevent their deactivation by bleach.
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Affiliation(s)
- Renhua Deng
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Matthew J. Derry
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Charlotte J. Mable
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Yin Ning
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
| | - Steven P. Armes
- Dainton Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, United Kingdom
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28
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Zhuang J, Garzoni M, Torres DA, Poe A, Pavan GM, Thayumanavan S. Programmable Nanoassemblies from Non-Assembling Homopolymers Using Ad Hoc Electrostatic Interactions. Angew Chem Int Ed Engl 2017; 56:4145-4149. [PMID: 28294469 PMCID: PMC5543410 DOI: 10.1002/anie.201611688] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/23/2017] [Indexed: 12/21/2022]
Abstract
Robust nanostructures were obtained from polymers that otherwise do not assemble by using a novel approach based on electrostatic self-assembly. The essence of this strategy involves the use of divalent counterions to temporarily perturb the packing features of the ionic groups in a homopolymer, which results in a vesicle-like structure that is captured in situ through a simple crosslinking reaction. The fidelity of the assembly has been tested for molecular transport across the nanomembrane, both for the molecules encapsulated in the lumen and for those trapped in the membrane itself. The membranes are addressable for robust multifunctionalization of their surfaces and for tunable transmembrane molecular transport.
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Affiliation(s)
- Jiaming Zhuang
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA, 01003, USA
| | - Matteo Garzoni
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Galleria 2, Via Cantonale 2C, Manno, 6928, Switzerland
| | - Diego Amado Torres
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA, 01003, USA
| | - Ambata Poe
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA, 01003, USA
| | - Giovanni M Pavan
- Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Galleria 2, Via Cantonale 2C, Manno, 6928, Switzerland
| | - S Thayumanavan
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA, 01003, USA
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29
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Zhuang J, Garzoni M, Torres DA, Poe A, Pavan GM, Thayumanavan S. Programmable Nanoassemblies from Non‐Assembling Homopolymers Using Ad Hoc Electrostatic Interactions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Jiaming Zhuang
- Department of Chemistry University of Massachusetts Amherst Amherst MA 01003 USA
| | - Matteo Garzoni
- Department of Innovative Technologies University of Applied Sciences and Arts of Southern Switzerland Galleria 2, Via Cantonale 2C Manno 6928 Switzerland
| | - Diego Amado Torres
- Department of Chemistry University of Massachusetts Amherst Amherst MA 01003 USA
| | - Ambata Poe
- Department of Chemistry University of Massachusetts Amherst Amherst MA 01003 USA
| | - Giovanni M. Pavan
- Department of Innovative Technologies University of Applied Sciences and Arts of Southern Switzerland Galleria 2, Via Cantonale 2C Manno 6928 Switzerland
| | - S. Thayumanavan
- Department of Chemistry University of Massachusetts Amherst Amherst MA 01003 USA
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30
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Laskar P, Dey J, Banik P, Mandal M, Ghosh SK. In Vitro Drug and Gene Delivery Using Random Cationic Copolymers Forming Stable and pH-Sensitive Polymersomes. Macromol Biosci 2016; 17. [PMID: 27879056 DOI: 10.1002/mabi.201600324] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 10/15/2016] [Indexed: 11/06/2022]
Abstract
Stimuli-sensitive polymeric vesicles or polymersomes as self-assembled colloidal nanocarriers have received paramount importance for their integral role as delivery system for therapeutics and biotherapeutics. This work describes spontaneous polymersome formation at pH 7, as evidenced by surface tension, steady state fluorescence, dynamic light scattering, and microscopic studies, by three hydrophilic random cationic copolymers synthesized using N,N-(dimethylamino)ethyl methacrylate (DMAEM) and methoxy poly(ethylene glycol) monomethacrylate in different mole ratios. The results suggest that methoxy poly(ethylene glycol) chains constitute the bilayer membrane of the polymersomes and DMAEM projects toward water constituting the positively charged surface. The polymersomes have been observed to release their encapsulated guest at acidic pH as a result of transformation into polymeric micelles. All these highly biocompatible cationic polymers show successful gene transfection ability as nonviral vector on human cell line with different potential. Thus these polymers prove their utility as a potential delivery system for hydrophilic model drug as well as genetic material.
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Affiliation(s)
- Partha Laskar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, India
| | - Joykrishna Dey
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, India
| | - Payel Banik
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, India
| | - Mahitosh Mandal
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, India
| | - Sudip Kumar Ghosh
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, 721 302, India
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Parida S, Maiti C, Rajesh Y, Dey KK, Pal I, Parekh A, Patra R, Dhara D, Dutta PK, Mandal M. Gold nanorod embedded reduction responsive block copolymer micelle-triggered drug delivery combined with photothermal ablation for targeted cancer therapy. Biochim Biophys Acta Gen Subj 2016; 1861:3039-3052. [PMID: 27721046 DOI: 10.1016/j.bbagen.2016.10.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 10/01/2016] [Accepted: 10/04/2016] [Indexed: 01/04/2023]
Abstract
BACKGROUND Gold nanorods, by virtue of surface plasmon resonance, convert incident light energy (NIR) into heat energy which induces hyperthermia. We designed unique, multifunctional, gold nanorod embedded block copolymer micelle loaded with GW627368X for targeted drug delivery and photothermal therapy. METHODS Glutathione responsive diblock co-polymer was synthesized by RAFT process forming self-assembled micelle on gold nanorods prepared by seed mediated method and GW627368X was loaded on to the reduction responsive gold nanorod embedded micelle. Photothermal therapy was administered using cwNIR laser (808nm; 4W/cm2). Efficacy of nanoformulated GW627368X, photothermal therapy and combination of both were evaluated in vitro and in vivo. RESULTS In response to photothermal treatment, cells undergo regulated, patterned cell death by necroptosis. Combining GW627368X with photothermal treatment using single nanoparticle enhanced therapeutic outcome. In addition, these nanoparticles are effective X-ray CT contrast agents, thus, can help in monitoring treatment. CONCLUSION Reduction responsive nanorod embedded micelle containing folic acid and lipoic acid when treated on cervical cancer cells or tumour bearing mice, aggregate in and around cancer cells. Due to high glutathione concentration, micelles degrade releasing drug which binds surface receptors inducing apoptosis. When incident with 808nm cwNIR lasers, gold nanorods bring about photothermal effect leading to hyperthermic cell death by necroptosis. Combination of the two modalities enhances therapeutic efficacy by inducing both forms of cell death. GENERAL SIGNIFICANCE Our proposed treatment strategy achieves photothermal therapy and targeted drug delivery simultaneously. It can prove useful in overcoming general toxicities associated with chemotherapeutics and intrinsic/acquired resistance to chemo and radiotherapy.
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Affiliation(s)
- Sheetal Parida
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Chiranjit Maiti
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Y Rajesh
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Kaushik K Dey
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Ipsita Pal
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Aditya Parekh
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Rusha Patra
- Department of Electrical Engineering, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Dibakar Dhara
- Department of Chemistry, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Pranab Kumar Dutta
- Department of Electrical Engineering, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Mahitosh Mandal
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, West Bengal 721302, India.
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Maiti C, Banerjee R, Maiti S, Dhara D. Water-soluble polymeric chemosensor for detection of Cu2+ ions with high selectivity and sensitivity. Des Monomers Polym 2016. [DOI: 10.1080/15685551.2016.1199111] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- Chiranjit Maiti
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Rakesh Banerjee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Saikat Maiti
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
| | - Dibakar Dhara
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India
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33
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Biswas S, Mani E, Mondal A, Tiwari A, Roy S. Supramolecular polyelectrolyte complex (SPEC): pH dependent phase transition and exploitation of its carrier properties. SOFT MATTER 2016; 12:1989-1997. [PMID: 26661046 DOI: 10.1039/c5sm02732b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A supramolecular poly-electrolyte complex (SPEC) comprising poly-electrolyte acrylic acid with supramolecularly complexed guanidium is reported. This complex shows pH responsive phase transitions, which are described and characterized using microscopy, spectroscopy, density functional theory studies and Monte Carlo simulations. The phase behaviour of the SPEC is exploited by loading a dye like perylene and a drug, viz., doxorubicin, and their pH dependent controlled release is demonstrated, owing to the pH dependent phase change of the SPEC.
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Affiliation(s)
- Subharanjan Biswas
- Eco-Friendly Applied Materials Laboratory, Department of Chemical Sciences, New Campus, IISER-Kolkata, India.
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34
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Lovett J, Warren NJ, Armes SP. Order-Order Morphological Transitions for Dual Stimulus Responsive Diblock Copolymer Vesicles. Macromolecules 2016; 49:1016-1025. [PMID: 26937051 PMCID: PMC4762544 DOI: 10.1021/acs.macromol.5b02470] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 01/11/2016] [Indexed: 01/27/2023]
Abstract
A series of non-ionic poly(glycerol monomethacrylate)-poly(2-hydroxypropyl methacrylate) (PGMA-PHPMA) diblock copolymer vesicles has been prepared by reversible addition-fragmentation chain transfer (RAFT) aqueous dispersion polymerization of HPMA at 70 °C at low pH using a carboxylic acid-based chain transfer agent. The degree of polymerization (DP) of the PGMA block was fixed at 43, and the DP of the PHPMA block was systematically varied from 175 to 250 in order to target vesicle phase space. Based on our recent work describing the analogous PGMA-PHPMA diblock copolymer worms [Lovett J. R.; Angew. Chem.2015, 54, 1279-1283], such diblock copolymer vesicles were expected to undergo an order-order morphological transition via ionization of the carboxylic acid end-group on switching the solution pH. Indeed, irreversible vesicle-to-sphere and vesicle-to-worm transitions were observed for PHPMA DPs of 175 and 200, respectively, as judged by turbidimetry, transmission electron microscopy (TEM), and dynamic light scattering (DLS) studies. However, such morphological transitions are surprisingly slow, with relatively long time scales (hours) being required at 20 °C. Moreover, no order-order morphological transitions were observed for vesicles comprising longer membrane-forming blocks (e.g., PGMA43-PHPMA225-250) on raising the pH from pH 3.5 to pH 6.0. However, in such cases the application of a dual stimulus comprising the same pH switch immediately followed by cooling from 20 to 5 °C, induces an irreversible vesicle-to-sphere transition. Finally, TEM and DLS studies conducted in the presence of 100 mM KCl demonstrated that the pH-responsive behavior arising from end-group ionization could be suppressed in the presence of added electrolyte. This is because charge screening suppresses the subtle change in the packing parameter required to drive the morphological transition.
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Affiliation(s)
- Joseph
R. Lovett
- Dainton
Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, Yorkshire S3 7HF, U.K.
| | - Nicholas J. Warren
- Dainton
Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, Yorkshire S3 7HF, U.K.
| | - Steven P. Armes
- Dainton
Building, Department
of Chemistry, The University of Sheffield, Brook Hill, Sheffield, Yorkshire S3 7HF, U.K.
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Robin MP, Osborne SAM, Pikramenou Z, Raymond JE, O'Reilly RK. Fluorescent Block Copolymer Micelles That Can Self-Report on Their Assembly and Small Molecule Encapsulation. Macromolecules 2016; 49:653-662. [PMID: 27065494 PMCID: PMC4819497 DOI: 10.1021/acs.macromol.5b02152] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 12/11/2015] [Indexed: 01/23/2023]
Abstract
![]()
Block copolymer micelles have been
prepared with a dithiomaleimide
(DTM) fluorophore located in either the core or shell. Poly(triethylene
glycol acrylate)-b-poly(tert-butyl
acrylate) (P(TEGA)-b-P(tBA)) was
synthesized by RAFT polymerization, with a DTM-functional acrylate
monomer copolymerized into either the core forming P(tBA) block or the shell forming P(TEGA) block. Self-assembly by direct
dissolution afforded spherical micelles with Rh of ca. 35 nm. Core-labeled micelles (CLMs)
displayed bright emission (Φf = 17%) due to good
protection of the fluorophore, whereas shell-labeled micelles (SLMs)
had lower efficiency emission due to collisional quenching in the
solvated corona. The transition from micelles to polymer unimers upon
dilution could be detected by measuring the emission intensity of
the solutions. For the core-labeled micelles, the fluorescence lifetime
was also responsive to the supramolecular state, the lifetime being
significantly longer for the micelles (τAv,I = 19
ns) than for the polymer unimers (τAv,I = 9 ns).
The core-labeled micelles could also self-report on the presence of
a fluorescent hydrophobic guest molecule (Nile Red) as a result of
Förster resonance energy transfer (FRET) between the DTM fluorophore
and the guest. The sensitivity of the DTM fluorophore to its environment
therefore provides a simple handle to obtain detailed structural information
for the labeled polymer micelles. A case will also be made for the
application superiority of core-labeled micelles over shell-labeled
micelles for the DTM fluorophore.
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Affiliation(s)
- Mathew P Robin
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, U.K
| | - Shani A M Osborne
- School of Chemistry, The University of Birmingham , Edgbaston B15 2TT, U.K
| | - Zoe Pikramenou
- School of Chemistry, The University of Birmingham , Edgbaston B15 2TT, U.K
| | - Jeffery E Raymond
- Department of Chemistry and Laboratory for Synthetic-Biologic Interactions, Texas A&M University , College Station, Texas 77842-3012, United States
| | - Rachel K O'Reilly
- Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, U.K
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Wang D, Liu B, Lü J, Lü C. Facile synthesis of thermo-responsive episulfide group-containing diblock copolymers as robust protecting ligands of gold nanoparticles for catalytic applications. RSC Adv 2016. [DOI: 10.1039/c6ra02885c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Well-defined novel thermo-responsive diblock copolymers containing episulfide ligand stabilized Au NPs show interesting assembly morphologies, excellent colloidal stability and high catalytic activity for the reduction of 4-nitrophenol.
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Affiliation(s)
- Dongmei Wang
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province
- College of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Bingxin Liu
- School of Mechanical Engineering
- Qinghai University
- Xining 810016
- P. R. China
| | - Jianhua Lü
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province
- College of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Changli Lü
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province
- College of Chemistry
- Northeast Normal University
- Changchun 130024
- P. R. China
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37
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Hatton FL, Chambon P, Savage AC, Rannard SP. Role of highly branched, high molecular weight polymer structures in directing uniform polymer particle formation during nanoprecipitation. Chem Commun (Camb) 2016; 52:3915-8. [PMID: 26871974 DOI: 10.1039/c6cc00611f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The presence of highly branched polymers with >100 conjoined primary chains is shown to induce a novel rapid nucleation and growth mechanism within polymer nanoprecipitation yielding functional, uniform nanoparticles without stabilisers, filtration or rapid mixing techniques.
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38
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Banerjee R, Parida S, Maiti C, Mandal M, Dhara D. pH-degradable and thermoresponsive water-soluble core cross-linked polymeric nanoparticles as potential drug delivery vehicle for doxorubicin. RSC Adv 2015. [DOI: 10.1039/c5ra17158j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Doxorubicin release at preferred lysosomal pH of the cancer cells due to pH-induced de-crosslinking of polymer nanoparticle core.
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Affiliation(s)
- Rakesh Banerjee
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- India
| | - Sheetal Parida
- School of Medical Science and Technology
- Indian Institute of Technology Kharagpur
- India
| | - Chiranjit Maiti
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- India
| | - Mahitosh Mandal
- School of Medical Science and Technology
- Indian Institute of Technology Kharagpur
- India
| | - Dibakar Dhara
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- India
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