1
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Dendronized Hyperbranched Polymer: A New Architecture for Second-Order Nonlinear Optics. Symmetry (Basel) 2022. [DOI: 10.3390/sym14050882] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Organic/polymeric second-order nonlinear optical (NLO) materials, which rely on the poling-induced non-centrosymmetric arrangement of NLO chromophores, have played a very important role in laser technology and optical fiber communication, due to their ultra-fast response speed, excellent machining performance and low dielectric constant. However, the NLO chromophores have the large dipole moments with strong intramolecular charge transfer, which lead to the intermolecular electrostatic interactions to tend to the centrosymmetric arrangement and decrease the poling efficiency. Since the special three-dimensional spatial separation can minimize these strong intermolecular electrostatic interactions during poling process, dendrimers and hyperbranched polymers have been considered as better topology for the next generation of highly efficient NLO materials. In 2013, by the attachment of low generation dendrimers to the hyperbranched backbone, a new dendritic architecture of dendronized hyperbranched polymer (DHP) was proposed for improving the comprehensive performance of NLO materials. Recent results showed many advantages of DHPs in NLO field, such as easy syntheses, large NLO coefficients and high orientation stability, etc. In this review, the latest advancement of DHPs, including the design principle, synthesis, as well as their application as NLO materials is summarized. The new opportunities arising from DHPs are also summarized in the future perspective.
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2
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Li C, Han L, Bai H, Zhang S, Wang X, Li Y, Ma H. Synthesis and branching structure detection of long-subchain hyperbranched polymers via pyrene-labelled methodology. POLYMER 2022. [DOI: 10.1016/j.polymer.2021.124479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Yang C, Lin ZI, Chen JA, Xu Z, Gu J, Law WC, Yang JHC, Chen CK. Organic/Inorganic Self-Assembled Hybrid Nano-Architectures for Cancer Therapy Applications. Macromol Biosci 2021; 22:e2100349. [PMID: 34735739 DOI: 10.1002/mabi.202100349] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/25/2021] [Indexed: 12/20/2022]
Abstract
Since the conceptualization of nanomedicine, numerous nanostructure-mediated drug formulations have progressed into clinical trials for treating cancer. However, recent clinical trial results indicate such kind of drug formulations has a limited improvement on the antitumor efficacy. This is due to the biological barriers associated with those formulations, for example, circulation stability, extravasation efficiency in tumor, tumor penetration ability, and developed multi-drug resistance. When employing for nanomedicine formulations, pristine organic-based and inorganic-based nanostructures have their own limitations. Accordingly, organic/inorganic (O/I) hybrids have been developed to integrate the merits of both, and to minimize their intrinsic drawbacks. In this context, the recent development in O/I hybrids resulting from a self-assembly strategy will be introduced. Through such a strategy, organic and inorganic building blocks can be self-assembled via either chemical covalent bonds or physical interactions. Based on the self-assemble procedure, the hybridization of four organic building blocks including liposomes, micelles, dendrimers, and polymeric nanocapsules with five functional inorganic nanoparticles comprising gold nanostructures, magnetic nanoparticles, carbon-based materials, quantum dots, and silica nanoparticles will be highlighted. The recent progress of these O/I hybrids in advanced modalities for combating cancer, such as, therapeutic agent delivery, photothermal therapy, photodynamic therapy, and immunotherapy will be systematically reviewed.
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Affiliation(s)
- Chengbin Yang
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Zheng-Ian Lin
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Jian-An Chen
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
| | - Zhourui Xu
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen, 518060, China
| | - Jiayu Gu
- Department of Pharmacy, The Second Clinical Medical College (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, China
| | - Wing-Cheung Law
- Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Jason Hsiao Chun Yang
- Department of Fiber and Composite Materials, Feng Chia University, Taichung, 40724, Taiwan
| | - Chih-Kuang Chen
- Polymeric Biomaterials Laboratory, Department of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan
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4
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Zou W, He J. Synthesis of a Hierarchically Branched Dendritic Polymer Possessing Multiple Dendrons on a Dendrimer-like Backbone. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wenkai Zou
- The State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Junpo He
- The State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
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5
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Cassin SR, Flynn S, Chambon P, Rannard SP. Quantification of branching within high molecular weight polymers with polyester backbones formed by transfer-dominated branching radical telomerisation (TBRT). RSC Adv 2021; 11:24374-24380. [PMID: 35479039 PMCID: PMC9036642 DOI: 10.1039/d1ra03886a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 06/28/2021] [Indexed: 12/13/2022] Open
Abstract
New branched polymerisations offer previously inaccessible macromolecules and architectural understanding is important as it provides insight into the branching mechanism and enables the determination of structure–property relationships. Here we present a detailed inverse gated 13C NMR characterisation of materials derived from the very recently reported Transfer-dominated Branching Radical Telomerisation (TBRT) approach to quantify branching and provide an insight into cyclisation. The characterisation and quantification of branching is key to understanding new complex macromolecules. Here we establish approaches to evaluate the unique and novel architectures formed by Transfer-dominated Branching Radical Telomerisation (TBRT).![]()
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Affiliation(s)
- Savannah R Cassin
- Department of Chemistry, University of Liverpool Crown Street L69 7ZD UK .,Materials Innovation Factory, University of Liverpool Crown Street L69 7ZD UK
| | - Sean Flynn
- Department of Chemistry, University of Liverpool Crown Street L69 7ZD UK .,Materials Innovation Factory, University of Liverpool Crown Street L69 7ZD UK
| | - Pierre Chambon
- Department of Chemistry, University of Liverpool Crown Street L69 7ZD UK .,Materials Innovation Factory, University of Liverpool Crown Street L69 7ZD UK
| | - Steve P Rannard
- Department of Chemistry, University of Liverpool Crown Street L69 7ZD UK .,Materials Innovation Factory, University of Liverpool Crown Street L69 7ZD UK
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6
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Rogers HE, Chambon P, Flynn S, Hern FY, Owen A, Rannard SP. Designing single trigger/dual-response release and degradation into amine-functional hyperbranched-polydendron nanoprecipitates. NANOSCALE ADVANCES 2020; 2:5468-5477. [PMID: 36132019 PMCID: PMC9418457 DOI: 10.1039/d0na00696c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 10/20/2020] [Indexed: 06/15/2023]
Abstract
The synthesis of complex polymer architectures using relatively facile experimental protocols provides access to materials with the opportunity to control functionality and physical behaviour. The scope of hyperbranched-polydendron chemistries has been expanded here to include primary chains comprising amine-functional 'homopolymer', 'statistical copolymer' and amphiphilic 'block copolymer' analogues using 2-(diethyl amino)ethyl methacrylate, 2-hydroxy propyl methacrylate and t-butyl methacrylate. The different primary chain chemistry and architectures leads to a marked variation in nanoprecipitation behaviour and the response of the resulting amine-functional nanoparticles to varying pH. When acid-sensitive and acid-stable branchers, 1,4-butanediol di(methacryoyloxy)-ethyl ether and ethylene glycol dimethacrylate respectively, are utilised, nanoparticles with encapsulation properties are formed and may be triggered to either release-and-disassemble or release-disassemble-degrade to form a solution of lower molecular weight constituent primary chains.
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Affiliation(s)
- Hannah E Rogers
- Department of Chemistry, University of Liverpool Crown Street L69 7ZD UK
| | - Pierre Chambon
- Department of Chemistry, University of Liverpool Crown Street L69 7ZD UK
- Materials Innovation Factory, University of Liverpool Crown Street L69 7ZD UK
| | - Sean Flynn
- Department of Chemistry, University of Liverpool Crown Street L69 7ZD UK
- Materials Innovation Factory, University of Liverpool Crown Street L69 7ZD UK
| | - Faye Y Hern
- Department of Chemistry, University of Liverpool Crown Street L69 7ZD UK
- Materials Innovation Factory, University of Liverpool Crown Street L69 7ZD UK
| | - Andrew Owen
- Materials Innovation Factory, University of Liverpool Crown Street L69 7ZD UK
- Department of Molecular and Clinical Pharmacology, University of Liverpool Block H, 70 Pembroke Place Liverpool L69 3GF UK
| | - Steve P Rannard
- Department of Chemistry, University of Liverpool Crown Street L69 7ZD UK
- Materials Innovation Factory, University of Liverpool Crown Street L69 7ZD UK
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7
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Elkateb H, Tatham LM, Cauldbeck H, Niezabitowska E, Owen A, Rannard S, McDonald T. Optimization of the synthetic parameters of lipid polymer hybrid nanoparticles dual loaded with darunavir and ritonavir for the treatment of HIV. Int J Pharm 2020; 588:119794. [PMID: 32828978 DOI: 10.1016/j.ijpharm.2020.119794] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 12/12/2022]
Abstract
Human Immunodeficiency Virus (HIV) is a global health concern to which nanomedicine approaches provide opportunities to improve the bioavailability of existing drugs used to treat HIV.In this article, lipid polymer hybrid nanoparticles (LPHNs) were developed as a system to provide a combination drug delivery of two leading antiretroviral drugs; darunavir (DRV) and its pharmacokinetic enhancer ritonavir (RTV).The LPHNs were designed with a poly(D, l-lactide-co-glycolide) (PLGA) core, and soybean lecithin (SBL) and Brij 78 as the stabilizers. The LPHNs were prepared by modified nanoprecipitation and the effect of synthetic conditions on the particle properties was studied, which included the Z-average diameter and polydispersity index of LPHNs in water and phosphate buffered saline, and the morphology of the particles. This investigation aimed to prepare a formulation that could be stored in its dry and redispersible form, therefore avoiding the challenges associated with storage of dispersions. The optimum ratio of stabilizer to polymer core was established at 20% w/w, and Brij 78 was found to be crucial in providing colloidal stability in physiological solutions; the minimum amount of Brij 78 required to provide stability in phosphate buffered saline was 70% w/w of the total stabilizer mass. Viable formulations of LPHNs containing DRV and RTV in the clinically used 8:1 ratio were prepared containing 20% w/w DRV with respect to the PLGA mass. The use of cryoprotectant, polyethylene glycol, combined with freeze-drying yielded LPHNs with a Z-average diameter of 150 nm when the particles were re-dispersed in water. The oral absorption behavior was assessed using an in vitro triple culture model. Whilst the use of cryoprotectant and freeze-drying led to no improvement of the transcellular permeability compared to the unformulated drugs, the non-freeze-dried samples with the highest soybean lecithin led to increased transcellular permeability, revealing the potential of LPHNs for enhancing HIV treatment.
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Affiliation(s)
- Heba Elkateb
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK; Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, El Gomhouria Street, 35516, Egypt
| | - Lee M Tatham
- Department of Molecular and Clinical Pharmacology, Materials Innovation Factory, University of Liverpool, Liverpool L7 3NY, UK; Tandem Nano Ltd., Liverpool, UK
| | - Helen Cauldbeck
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Edyta Niezabitowska
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
| | - Andrew Owen
- Department of Molecular and Clinical Pharmacology, Materials Innovation Factory, University of Liverpool, Liverpool L7 3NY, UK; Tandem Nano Ltd., Liverpool, UK
| | - Steve Rannard
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK; Tandem Nano Ltd., Liverpool, UK
| | - Tom McDonald
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK.
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Gao Y, Zhou D, Lyu J, A S, Xu Q, Newland B, Matyjaszewski K, Tai H, Wang W. Complex polymer architectures through free-radical polymerization of multivinyl monomers. Nat Rev Chem 2020; 4:194-212. [PMID: 37128047 DOI: 10.1038/s41570-020-0170-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/07/2020] [Indexed: 01/26/2023]
Abstract
The construction of complex polymer architectures with well-defined topology, composition and functionality has been extensively explored as the molecular basis for the development of modern polymer materials. The unique reaction kinetics of free-radical polymerization leads to the concurrent formation of crosslinks between polymer chains and rings within an individual chain and, thus, free-radical (co)polymerization of multivinyl monomers provides a facile method to manipulate chain topology and functionality. Regulating the relative contribution of these intermolecular and intramolecular chain-propagation reactions is the key to the construction of architecturally complex polymers. This can be achieved through the design of new monomers or by spatially or kinetically controlling crosslinking reactions. These mechanisms enable the synthesis of various polymer architectures, including linear, cyclized, branched and star polymer chains, as well as crosslinked networks. In this Review, we highlight some of the contemporary experimental strategies to prepare complex polymer architectures using radical polymerization of multivinyl monomers. We also examine the recent development of characterization techniques for sub-chain connections in such complex macromolecules. Finally, we discuss how these crosslinking reactions have been engineered to generate advanced polymer materials for use in a variety of biomedical applications.
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9
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Vasey CE, Pearce AK, Sodano F, Cavanagh R, Abelha T, Cuzzucoli Crucitti V, Anane-Adjei AB, Ashford M, Gellert P, Taresco V, Alexander C. Amphiphilic tri- and tetra-block co-polymers combining versatile functionality with facile assembly into cytocompatible nanoparticles. Biomater Sci 2020; 7:3832-3845. [PMID: 31286122 DOI: 10.1039/c9bm00667b] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
In order for synthetic polymers to find widespread practical application as biomaterials, their syntheses must be easy to perform, utilising freely available building blocks, and should generate products which have no adverse effects on cells or tissue. In addition, it is highly desirable that the synthesis platform for the biomaterials can be adapted to generate polymers with a range of physical properties and macromolecular architectures, and with multiple functional handles to allow derivatisation with 'actives' for sensing or therapy. Here we describe the syntheses of amphiphilic tri- and tetra-block copolymers, using diazabicyclo[5.4.0]undec-5-ene (DBU) as a metal-free catalyst for ring-opening polymerisations of the widely-utilised monomer lactide combined with a functionalised protected cyclic carbonate. These syntheses employed PEGylated macroinitiators with varying chain lengths and architectures, as well as a labile-ester methacrylate initiator, and produced block copolymers with good control over monomer incorporation, molar masses, side-chain and terminal functionality and physico-chemical properties. Regardless of the nature of the initiators, the fidelity of the hydroxyl end group was maintained as confirmed by a second ROP chain extension step, and polymers with acryloyl/methacryloyl termini were able to undergo a second tandem reaction step, in particular thiol-ene click and RAFT polymerisations for the production of hyperbranched materials. Furthermore, the polymer side-chain functionalities could be easily deprotected to yield an active amine which could be subsequently coupled to a drug molecule in good yields. The resultant amphiphilic copolymers formed a range of unimolecular or kinetically-trapped micellar-like nanoparticles in aqueous environments, and the non-cationic polymers were all well-tolerated by MCF-7 breast cancer cells. The rapid and facile route to such highly adaptable polymers, as demonstrated here, offers promise for a range of bio materials applications.
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Affiliation(s)
- Catherine E Vasey
- School of Pharmacy, University Park University of Nottingham, NG7 2RD, UK.
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10
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Savage AC, Tatham LM, Siccardi M, Scott T, Vourvahis M, Clark A, Rannard SP, Owen A. Improving maraviroc oral bioavailability by formation of solid drug nanoparticles. Eur J Pharm Biopharm 2019; 138:30-36. [DOI: 10.1016/j.ejpb.2018.05.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 04/09/2018] [Accepted: 05/14/2018] [Indexed: 01/08/2023]
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11
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Hern FY, Hill A, Owen A, Rannard SP. Co-initiated hyperbranched-polydendron building blocks for the direct nanoprecipitation of dendron-directed patchy particles with heterogeneous surface functionality. Polym Chem 2018. [DOI: 10.1039/c8py00291f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A synthetic strategy branched polymer building blocks that allow the rapid construction of patchy nanoparticles is presented. Hyperbranched polydendrons with mixtures of PEG and thiol-functional dendrons nanoprecipitate to form isolated zones that are imaged with gold nanoparticles.
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Affiliation(s)
- F. Y. Hern
- Department of Chemistry
- University of Liverpool
- UK
| | - A. Hill
- Department of Chemistry
- University of Liverpool
- UK
| | - A. Owen
- Department of Molecular and Clinical Pharmacology
- University of Liverpool
- Liverpool L69 3GF
- UK
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12
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Advances in nanomedicine drug delivery applications for HIV therapy. Future Sci OA 2017; 4:FSO230. [PMID: 29255619 PMCID: PMC5729605 DOI: 10.4155/fsoa-2017-0069] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 07/07/2017] [Indexed: 01/05/2023] Open
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13
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Hern FY, Auty SER, Andrén OCJ, Malkoch M, Rannard SP. Model studies of the sequential and simultaneous statistical modification of dendritic functional groups and their implications within complex polymer architecture synthesis. Polym Chem 2017. [DOI: 10.1039/c7py00140a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Accurate analysis of model systems by MALDI-TOF has established the diversity of structures formed during post-synthesis functionalisation of complex polymer architectures. NMR studies alone are shown to be highly misleading.
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Affiliation(s)
- Faye Y. Hern
- Department of Chemistry
- University of Liverpool
- Liverpool L69 7ZD
- UK
| | - Sam E. R. Auty
- Department of Chemistry
- University of Liverpool
- Liverpool L69 7ZD
- UK
| | - Oliver C. J. Andrén
- KTH Royal Institute of Technology
- School of Chemical Engineering
- Department of Fibre and Polymer Technology
- SE-100 44 Stockholm
- Sweden
| | - Michael Malkoch
- KTH Royal Institute of Technology
- School of Chemical Engineering
- Department of Fibre and Polymer Technology
- SE-100 44 Stockholm
- Sweden
| | - Steve P. Rannard
- Department of Chemistry
- University of Liverpool
- Liverpool L69 7ZD
- UK
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14
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Cauldbeck H, Le Hellaye M, Long M, Kennedy SM, Williams RL, Kearns VR, Rannard SP. Controlling drug release from non-aqueous environments: Moderating delivery from ocular silicone oil drug reservoirs to combat proliferative vitreoretinopathy. J Control Release 2016; 244:41-51. [DOI: 10.1016/j.jconrel.2016.11.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 11/05/2016] [Accepted: 11/10/2016] [Indexed: 01/20/2023]
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15
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Nanoformulation strategies for the enhanced oral bioavailability of antiretroviral therapeutics. Ther Deliv 2016; 6:469-90. [PMID: 25996045 DOI: 10.4155/tde.15.4] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The oral delivery of drugs with poor aqueous solubility is challenging and often results in poor bioavailability. Various nanoformulation platforms have demonstrated improved oral bioavailability of a range of drugs for different indications. The focus of this review is to provide an overview of the application of nanomedicine to oral antiretroviral therapy and outline how the current short-falls of this life-long therapy may be resolved using nanotechnology. As well as highlighting the rationale for a nanomedicine-based approach, the review focuses on the various strategies used to enhance oral bioavailability and describes the mechanisms of particle absorption across the GI tract. The recent advances in the development of long-acting formulations for both HIV treatment and pre-exposure prophylaxis are also discussed.
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16
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Tang R, Li Z. Second-Order Nonlinear Optical Dendrimers and Dendronized Hyperbranched Polymers. CHEM REC 2016; 17:71-89. [DOI: 10.1002/tcr.201600065] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Indexed: 12/17/2022]
Affiliation(s)
- Runli Tang
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials; Department of Chemistry; Wuhan University; Wuhan 430072 P.R. China
| | - Zhen Li
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials; Department of Chemistry; Wuhan University; Wuhan 430072 P.R. China
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17
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Giardiello M, Hatton FL, Slater RA, Chambon P, North J, Peacock AK, He T, McDonald TO, Owen A, Rannard SP. Stable, polymer-directed and SPION-nucleated magnetic amphiphilic block copolymer nanoprecipitates with readily reversible assembly in magnetic fields. NANOSCALE 2016; 8:7224-7231. [PMID: 26973155 DOI: 10.1039/c6nr00788k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The formation of inorganic-organic magnetic nanocomposites using reactive chemistry often leads to a loss of super-paramagnetisim when conducted in the presence of iron oxide nanoparticles. We present here a low energy and chemically-mild process of co-nanoprecipitation using SPIONs and homopolymers or amphiphilic block copolymers, of varying architecture and hydrophilic/hydrophobic balance, which efficiently generates near monodisperse SPION-containing polymer nanoparticles with complete retention of magnetism, and highly reversible aggregation and redispersion behaviour. When linear and branched block copolymers with inherent water-solubility are used, a SPION-directed nanoprecipitation mechanism appears to dominate the nanoparticle formation presenting new opportunities for tailoring and scaling highly functional systems for a range of applications.
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Affiliation(s)
- Marco Giardiello
- Department of Chemistry, University of Liverpool, Crown Street, L697ZD, UK.
| | - Fiona L Hatton
- Department of Chemistry, University of Liverpool, Crown Street, L697ZD, UK.
| | - Rebecca A Slater
- Department of Chemistry, University of Liverpool, Crown Street, L697ZD, UK.
| | - Pierre Chambon
- Department of Chemistry, University of Liverpool, Crown Street, L697ZD, UK.
| | - Jocelyn North
- Department of Chemistry, University of Liverpool, Crown Street, L697ZD, UK.
| | - Anita K Peacock
- Department of Chemistry, University of Liverpool, Crown Street, L697ZD, UK.
| | - Tao He
- Institute of Chemical and Engineering Sciences Agency for Science, Technology and Research (A*STAR), 1, Pesek Road, Jurong Island, 627833, Singapore
| | - Tom O McDonald
- Department of Chemistry, University of Liverpool, Crown Street, L697ZD, UK.
| | - Andrew Owen
- Department of Molecular and Clinical Pharmacology, University of Liverpool, Block H, 70 Pembroke Place, Liverpool L69 3GF, UK
| | - Steve P Rannard
- Department of Chemistry, University of Liverpool, Crown Street, L697ZD, UK.
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18
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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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19
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Yang H, Tang R, Wu W, Liu W, Guo Q, Liu Y, Xu S, Cao S, Li Z. A series of dendronized hyperbranched polymers with dendritic chromophore moieties in the periphery: convenient synthesis and large nonlinear optical effects. Polym Chem 2016. [DOI: 10.1039/c6py00546b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Excellent optical transparency and NLO coefficients were achieved by introducing dendritic chromophore moieties to the periphery of dendronized hyperbranched polymers.
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Affiliation(s)
- Haitao Yang
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Runli Tang
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
| | - Wenbo Wu
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Wei Liu
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Qing Guo
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Yingliang Liu
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Shengang Xu
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Shaokui Cao
- School of Materials Science and Engineering
- Zhengzhou University
- Zhengzhou
- China
| | - Zhen Li
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
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20
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Wais U, Jackson AW, Zuo Y, Xiang Y, He T, Zhang H. Drug nanoparticles by emulsion-freeze-drying via the employment of branched block copolymer nanoparticles. J Control Release 2016; 222:141-50. [DOI: 10.1016/j.jconrel.2015.12.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/08/2015] [Accepted: 12/13/2015] [Indexed: 01/03/2023]
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21
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Owen A, Rannard S. Considerations for clinically-relevant nanomedicine therapies for chronic diseases. Nanomedicine (Lond) 2015; 10:3103-7. [PMID: 26446297 DOI: 10.2217/nnm.15.135] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Affiliation(s)
- Andrew Owen
- Department of Molecular & Clinical Pharmacology, University of Liverpool, Block H, 70 Pembroke Place, Liverpool L69 3GF, UK
| | - Steve Rannard
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
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22
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Rogers HE, Chambon P, Auty SER, Hern FY, Owen A, Rannard SP. Synthesis, nanoprecipitation and pH sensitivity of amphiphilic linear-dendritic hybrid polymers and hyperbranched-polydendrons containing tertiary amine functional dendrons. SOFT MATTER 2015; 11:7005-7015. [PMID: 26241924 DOI: 10.1039/c5sm00673b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The combination of linear polymers with dendritic chain-ends has led to numerous studies of linear-dendritic polymer hybrid materials. Interchain branching within the linear segment of these materials has recently extended this concept to the formation of soluble hyperbranched-polydendrons. Here, the introduction of amphiphilicity into hyperbranched-polydendrons has been achieved for the first time through the use of tertiary amine functional dendritic chain-ends and branched hydrophobic polymer segments. The synthesis and aqueous nanoprecipitation of these branched materials is compared with their linear-dendritic polymer analogues, showing that chain-end chemistry/generation, precipitation medium pH and polymer architecture are all capable of influencing the ability to generate nanoparticles, the resulting nanoparticle diameter and dispersity, and subsequent response to changes in pH.
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Affiliation(s)
- Hannah E Rogers
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK.
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23
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Jackson AW, Chandrasekharan P, Shi J, Rannard SP, Liu Q, Yang CT, He T. Synthesis and in vivo magnetic resonance imaging evaluation of biocompatible branched copolymer nanocontrast agents. Int J Nanomedicine 2015; 10:5895-907. [PMID: 26425088 PMCID: PMC4583124 DOI: 10.2147/ijn.s88764] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Branched copolymer nanoparticles (Dh =20–35 nm) possessing 1,4,7, 10-tetraazacyclododecane-N,N′,N″,N‴-tetraacetic acid macrocycles within their cores have been synthesized and applied as magnetic resonance imaging (MRI) nanosized contrast agents in vivo. These nanoparticles have been generated from novel functional monomers via reversible addition–fragmentation chain transfer polymerization. The process is very robust and synthetically straightforward. Chelation with gadolinium and preliminary in vivo experiments have demonstrated promising characteristics as MRI contrast agents with prolonged blood retention time, good biocompatibility, and an intravascular distribution. The ability of these nanoparticles to perfuse and passively target tumor cells through the enhanced permeability and retention effect is also demonstrated. These novel highly functional nanoparticle platforms have succinimidyl ester-activated benzoate functionalities within their corona, which make them suitable for future peptide conjugation and subsequent active cell-targeted MRI or the conjugation of fluorophores for bimodal imaging. We have also demonstrated that these branched copolymer nanoparticles are able to noncovalently encapsulate hydrophobic guest molecules, which could allow simultaneous bioimaging and drug delivery.
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Affiliation(s)
- Alexander W Jackson
- Institute of Chemical and Engineering Sciences (ICES), National University of Singapore, Singapore
| | - Prashant Chandrasekharan
- Laboratory of Molecular Imaging, Singapore Bioimaging Consortium, Agency for Science Technology and Research(A STAR), National University of Singapore, Singapore
| | - Jian Shi
- Department of Biological Science, National University of Singapore, Singapore
| | - Steven P Rannard
- Department of Chemistry, University of Liverpool, Liverpool, United Kingdom
| | - Quan Liu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore
| | - Chang-Tong Yang
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Tao He
- Institute of Chemical and Engineering Sciences (ICES), National University of Singapore, Singapore ; School of Chemistryand Chemical Engineering, HeFei University of Technology, Anhui, People's Republic of China
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24
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Ford J, Chambon P, North J, Hatton FL, Giardiello M, Owen A, Rannard SP. Multiple and Co-Nanoprecipitation Studies of Branched Hydrophobic Copolymers and A–B Amphiphilic Block Copolymers, Allowing Rapid Formation of Sterically Stabilized Nanoparticles in Aqueous Media. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00099] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jane Ford
- Department
of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K
| | - Pierre Chambon
- Department
of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K
| | - Jocelyn North
- Department
of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K
| | - Fiona L. Hatton
- Department
of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K
| | - Marco Giardiello
- Department
of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K
| | - Andrew Owen
- Department
of Molecular and Clinical Pharmacology, University of Liverpool, Block H, 70 Pembroke Place, Liverpool L69 3GF, U.K
| | - Steve P. Rannard
- Department
of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, U.K
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25
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Tang R, Chen H, Zhou S, Xiang W, Tang X, Liu B, Dong Y, Zeng H, Li Z. Dendronized hyperbranched polymers containing isolation chromophores: design, synthesis and further enhancement of the comprehensive NLO performance. Polym Chem 2015. [DOI: 10.1039/c5py00155b] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
New dendronized hyperbranched polymers (DHPs) constructed by dendronized monomers, exhibit good comprehensive NLO performance, especially for thermostability.
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Affiliation(s)
- Runli Tang
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
| | - Hong Chen
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
| | - Shengmin Zhou
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
| | - Wendi Xiang
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
| | - Xi Tang
- Department of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - Binwen Liu
- Fujian Institute of Research on the Structure of Matter
- The Chinese Academy of Sciences
- Fuzhou 350002
- China
| | - Yongqiang Dong
- Department of Chemistry
- Beijing Normal University
- Beijing 100875
- China
| | - Huiyi Zeng
- Fujian Institute of Research on the Structure of Matter
- The Chinese Academy of Sciences
- Fuzhou 350002
- China
| | - Zhen Li
- Department of Chemistry
- Wuhan University
- Wuhan 430072
- China
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26
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Dwyer AB, Chambon P, Town A, Hatton FL, Ford J, Rannard SP. Exploring the homogeneous controlled radical polymerisation of hydrophobic monomers in anti-solvents for their polymers: RAFT and ATRP of various alkyl methacrylates in anhydrous methanol to high conversion and low dispersity. Polym Chem 2015. [DOI: 10.1039/c5py00791g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
RAFT and ATRP of nBuMA, tBuMA and MMA in anhydrous methanol (25–60 °C) without precipitation, yielding polymers with conversion up to 99%, Đ from 1.02 and DPn ≤ 800 units.
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Affiliation(s)
- A. B. Dwyer
- Department of Chemistry
- University of Liverpool
- UK
| | - P. Chambon
- Department of Chemistry
- University of Liverpool
- UK
| | - A. Town
- Department of Chemistry
- University of Liverpool
- UK
| | - F. L. Hatton
- Department of Chemistry
- University of Liverpool
- UK
| | - J. Ford
- Department of Chemistry
- University of Liverpool
- UK
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