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Spanning BODIPY fluorescence with self-assembled micellar clusters. Colloids Surf B Biointerfaces 2022; 216:112532. [PMID: 35525227 DOI: 10.1016/j.colsurfb.2022.112532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 04/10/2022] [Accepted: 04/28/2022] [Indexed: 11/23/2022]
Abstract
BODIPY dyes possess favorable optical properties for a variety of applications including in vivo and in vitro diagnostics. However, their utilization might be limited by their water insolubility and incompatibility with chemical modifications, resulting in low aggregation stability. Here, we outline the route for addressing this issue. We have demonstrated two approaches, based on dye entrapment in micellar coordination clusters (MCCs); this provides a general solution for water solubility as well as aggregation stability of the seven BODIPY derivatives. These derivatives have various bulky aromatic substituents in the 2,3,5,6- and meso-positions and can rotate relative to a dipyrrin core, which also provides molecular rotor properties. The molecular structural features and the presence of aromatic groups allows BODIPY dyes to be used as "supporting molecules", thus promoting micelle-micelle interaction and micellar network stabilization. In the second approach, self-micellization, following BODIPY use, leads to MCC formation without the use of any mediators, including chelators and/or metal ions. In both approaches, BODIPY exhibits an excellent optical response, at a concentration beyond its solubilization limit in aqueous media and without undesired crystallization. The suggested approaches represent systems used to encapsulate BODIPY in a capsule-based surfactant environment, enabling one to track the aggregation of BODIPY; these approaches represent an alternative system to study and apply BODIPY's molecular rotor properties. The stabilized compounds, i.e., the BODIPY-loaded MCCs, provide a unique feature of permeability to hydrophilic ligand-switching proteins such as BSA; they exhibit a bright "turn-on" fluorescence signal within the clusters via macromolecular complexation, thus expanding the possibilities of water-soluble BODIPY-loaded MCCs utilization for functional indicators.
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2
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King BM, Fiegel J. Zwitterionic Polymer Coatings Enhance Gold Nanoparticle Stability and Uptake in Various Biological Environments. AAPS J 2022; 24:18. [PMID: 34984558 DOI: 10.1208/s12248-021-00652-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 09/30/2021] [Indexed: 11/30/2022] Open
Abstract
Zwitterionic polymers are a class of materials that have demonstrated utility as non-fouling surfaces for medical devices and drug delivery vehicles. Here, we develop a synthesis protocol to produce zwitterionic polymers as coatings for gold nanoparticles and evaluate nanoparticle stability and biological function after exposure to various biological fluids. Thiol-functionalized polymethacryloyloxyethyl phosphorylcholine polymers (pMPC) were synthesized in nontoxic solvents via photoinitiated free radical polymerization with a radical addition-fragmentation chain transfer (RAFT) agent and coated onto gold nanoparticles. pMPC-coated nanoparticles exhibited reduced particle aggregation, improved suspension stability, and decreased protein adsorption upon exposure to serum and lung lavage fluid (BALF). Cell uptake in A549 cells was greater for pMPC-coated particles than uncoated particles after exposure to serum and BALF, with no observed cell toxicity, but pMPC-coated particles experienced higher levels of cell uptake after serum exposure than BALF exposure, suggesting that differences in the composition of the fluids result in differing impacts on particle fate. These zwitterionic polymers may serve as useful nanoparticle coatings to enhance particle stability and uptake in various biological environments.
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Affiliation(s)
- Benjamin M King
- Department of Chemical and Biochemical Engineering, 4133 Seamans Center for the Engineering Arts and Sciences, The University of Iowa, Iowa City, Iowa, 52242, USA
| | - Jennifer Fiegel
- Department of Chemical and Biochemical Engineering, 4133 Seamans Center for the Engineering Arts and Sciences, The University of Iowa, Iowa City, Iowa, 52242, USA.
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3
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Chen F, Cai Y, Huang L, Chen Y, Luo X. Synthesis of a SN38 prodrug grafted to amphiphilic phosphorylcholine polymers and their prodrug miceller properties. NEW J CHEM 2019. [DOI: 10.1039/c8nj04908d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polymer prodrug micelles, combining the advantages of prodrugs and polymer micelles, can greatly improve the solubility, permeability and stability of drugs.
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Affiliation(s)
- Fan Chen
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Yuanyuan Cai
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Lei Huang
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Yuanwei Chen
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Xianglin Luo
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- P. R. China
- State Key Lab of Polymer Materials Engineering
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4
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Hossain T, Alam MA, Rahman MA, Sharafat MK, Minami H, Gafur MA, Hoque SM, Ahmad H. Zwitterionic poly(2-(methacryloyloxy) ethyl phosphorylcholine) coated mesoporous silica particles and doping with magnetic nanoparticles. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.06.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Bioinspired mimics: Self-assembly of redox-activated phosphorylcholine–based biodegradable copolymers for enhancing antitumor efficiency. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 89:401-412. [DOI: 10.1016/j.msec.2018.04.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 02/21/2018] [Accepted: 04/04/2018] [Indexed: 01/16/2023]
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Fischer FC, Abele C, Droge STJ, Henneberger L, König M, Schlichting R, Scholz S, Escher BI. Cellular Uptake Kinetics of Neutral and Charged Chemicals in in Vitro Assays Measured by Fluorescence Microscopy. Chem Res Toxicol 2018; 31:646-657. [PMID: 29939727 DOI: 10.1021/acs.chemrestox.8b00019] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Cellular uptake kinetics are key for understanding time-dependent chemical exposure in in vitro cell assays. Slow cellular uptake kinetics in relation to the total exposure time can considerably reduce the biologically effective dose. In this study, fluorescence microscopy combined with automated image analysis was applied for time-resolved quantification of cellular uptake of 10 neutral, anionic, cationic, and zwitterionic fluorophores in two reporter gene assays. The chemical fluorescence in the medium remained relatively constant during the 24-h assay duration, emphasizing that the proteins and lipids in the fetal bovine serum (FBS) supplemented to the assay medium represent a large reservoir of reversibly bound chemicals with the potential to compensate for chemical depletion by cell uptake, growth, and sorption to well materials. Hence FBS plays a role in stabilizing the cellular dose in a similar way as polymer-based passive dosing, here we term this process as serum-mediated passive dosing (SMPD). Neutral chemicals accumulated in the cells up to 12 times faster than charged chemicals. Increasing medium FBS concentrations accelerated uptake due to FBS-facilitated transport but led to lower cellular concentrations as a result of increased sorption to medium proteins and lipids. In vitro cell exposure results from the interaction of several extra- and intracellular processes, leading to variable and time-dependent exposure between different chemicals and assay setups. The medium FBS plays a crucial role for the thermodynamic equilibria as well as for the cellular uptake kinetics, hence influencing exposure. However, quantification of cellular exposure by an area under the curve (AUC) analysis illustrated that, for the evaluated bioassay setup, current in vitro exposure models that assume instantaneous equilibrium between medium and cells still reflect a realistic exposure because the AUC was typically reduced less than 20% compared to the cellular dose that would result from instantaneous equilibrium.
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Affiliation(s)
- Fabian C Fischer
- Department of Cell Toxicology , Helmholtz Centre for Environmental Research - UFZ , Permoserstraße 15 , 04318 Leipzig , Germany
| | - Cedric Abele
- Department of Cell Toxicology , Helmholtz Centre for Environmental Research - UFZ , Permoserstraße 15 , 04318 Leipzig , Germany
| | - Steven T J Droge
- Institute for Biodiversity and Ecosystem Dynamics , University of Amsterdam , Science Park 904 , 1098 XH Amsterdam , Netherlands
| | - Luise Henneberger
- Department of Cell Toxicology , Helmholtz Centre for Environmental Research - UFZ , Permoserstraße 15 , 04318 Leipzig , Germany
| | - Maria König
- Department of Cell Toxicology , Helmholtz Centre for Environmental Research - UFZ , Permoserstraße 15 , 04318 Leipzig , Germany
| | - Rita Schlichting
- Department of Cell Toxicology , Helmholtz Centre for Environmental Research - UFZ , Permoserstraße 15 , 04318 Leipzig , Germany
| | - Stefan Scholz
- Department of Bioanalytical Ecotoxicology , Helmholtz Centre for Environmental Research - UFZ , Permoserstraße 15 , 04318 Leipzig , Germany
| | - Beate I Escher
- Department of Cell Toxicology , Helmholtz Centre for Environmental Research - UFZ , Permoserstraße 15 , 04318 Leipzig , Germany.,Environmental Toxicology, Centre for Applied Geoscience , Eberhard Karls University Tübingen , 72074 Tübingen , Germany
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7
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Solubilization of poorly water-soluble compounds using amphiphilic phospholipid polymers with different molecular architectures. Colloids Surf B Biointerfaces 2017; 158:249-256. [DOI: 10.1016/j.colsurfb.2017.06.040] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 06/12/2017] [Accepted: 06/23/2017] [Indexed: 01/14/2023]
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8
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Azmy B, Standen G, Kristova P, Flint A, Lewis AL, Salvage JP. Nanostructured DPA-MPC-DPA triblock copolymer gel for controlled drug release of ketoprofen and spironolactone. ACTA ACUST UNITED AC 2017; 69:978-990. [PMID: 28480594 DOI: 10.1111/jphp.12733] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 03/26/2017] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Uncontrolled rapid release of drugs can reduce their therapeutic efficacy and cause undesirable toxicity; however, controlled release from reservoir materials helps overcome this issue. The aims of this study were to determine the release profiles of ketoprofen and spironolactone from a pH-responsive self-assembling DPA-MPC-DPA triblock copolymer gel and elucidate underlying physiochemical properties. METHODS Drug release profiles from DPA50 -MPC250 -DPA50 gel (pH 7.5), over 32 h (37 °C), were determined using UV-Vis spectroscopy. Nanoparticle size was measured by dynamic light scattering (DLS) and critical micelle concentration (CMC) by pyrene fluorescence. Polymer gel viscosity was examined via rheology, nanoparticle morphology investigated using scanning transmission electron microscopy (STEM) and the gel matrix observed using cryo-scanning electron microscopy (Cryo-SEM). KEY FINDINGS DPA50 -MPC250 -DPA50 copolymer (15% w/v) formed a free-standing gel (pH 7.5) that controlled drug release relative to free drugs. The copolymer possessed a low CMC, nanoparticle size increased with copolymer concentration, and DLS data were consistent with STEM. The gel displayed thermostable viscosity at physiological temperatures, and the gel matrix was a nanostructured aggregation of smaller nanoparticles. CONCLUSIONS The DPA50 -MPC250 -DPA50 copolymer gel could be used as a drug delivery system to provide the controlled drug release of ketoprofen and spironolactone.
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Affiliation(s)
- Bahaa Azmy
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, UK
| | - Guy Standen
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, UK
| | - Petra Kristova
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, UK
| | - Andrew Flint
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, UK
| | - Andrew L Lewis
- Biocompatibles UK Ltd, a BTG International plc Group Company, Innovation Group, Lakeview, Riverside Way, Watchmoor Park, Camberley, UK
| | - Jonathan P Salvage
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, UK
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Cai Y, Li S, Cai M, Chen Y, Luo X. Cellular uptake of pH/reduction responsive phosphorylcholine micelles. NEW J CHEM 2017. [DOI: 10.1039/c7nj02484c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We study the relationship between the PDEA content and internalization/intracellular drug release of pH responsive phosphorylcholine micelles as drug carriers.
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Affiliation(s)
- Yuanyuan Cai
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Shuai Li
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Mengtan Cai
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Yuanwei Chen
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- People's Republic of China
| | - Xianglin Luo
- College of Polymer Science and Engineering
- Sichuan University
- Chengdu 610065
- People's Republic of China
- State Key Laboratory of Polymer Materials Engineering
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