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Fan L, Jiang J, Sun Q, Hong K, Cornel EJ, Zhu Y, Du J. Fluorescent homopolypeptide toroids. Polym Chem 2022. [DOI: 10.1039/d1py01691a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Toroids are important ring-like nanostructures in living systems; intrinsically luminogenic toroids are promising in bioimaging but it is challenging to synthesize such nanoparticles. Herein, we report a fluorescent toroid that...
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2
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Corrêa RLGQ, dos Santos R, Albuquerque LJC, de Araujo GLB, Edwards-Gayle CJC, Ferreira FF, Costa FN. Ciprofibrate-Loaded Nanoparticles Prepared by Nanoprecipitation: Synthesis, Characterization, and Drug Release. Polymers (Basel) 2021; 13:3158. [PMID: 34578074 PMCID: PMC8468397 DOI: 10.3390/polym13183158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 11/17/2022] Open
Abstract
Ciprofibrate (CIP) is a highly lipophilic and poorly water-soluble drug, typically used for dyslipidemia treatment. Although it is already commercialized in capsules, no previous studies report its solid-state structure; thus, information about the correlation with its physicochemical properties is lacking. In parallel, recent studies have led to the improvement of drug administration, including encapsulation in polymeric nanoparticles (NPs). Here, we present CIP's crystal structure determined by PXRD data. We also propose an encapsulation method for CIP in micelles produced from Pluronic P123/F127 and PEO-b-PCL, aiming to improve its solubility, hydrophilicity, and delivery. We determined the NPs' physicochemical properties by DLS, SLS, ELS, SAXS and the loaded drug amount by UV-Vis spectroscopy. Micelles showed sizes around 10-20 nm for Pluronic and 35-45 nm for the PEO-b-PCL NPs with slightly negative surface charge and successful CIP loading, especially for the latter; a substantial reduction in ζ-potential may be evidenced. For Pluronic nanoparticles, we scanned different conditions for the CIP loading, and its encapsulation efficiency was reduced while the drug content increased in the nanoprecipitation protocol. We also performed in vitro release experiments; results demonstrate that probe release is driven by Fickian diffusion for the Pluronic NPs and a zero-order model for PEO-b-PCL NPs.
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Affiliation(s)
| | - Renan dos Santos
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), Santo André 09210-580, Brazil; (R.d.S.); (L.J.C.A.); (F.F.F.)
| | - Lindomar José Calumby Albuquerque
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), Santo André 09210-580, Brazil; (R.d.S.); (L.J.C.A.); (F.F.F.)
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-170, Brazil
| | | | | | - Fabio Furlan Ferreira
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), Santo André 09210-580, Brazil; (R.d.S.); (L.J.C.A.); (F.F.F.)
- Nanomedicine Research Unit (NANOMED), Federal University of ABC (UFABC), Santo André 09210-580, Brazil
| | - Fanny Nascimento Costa
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), Santo André 09210-580, Brazil; (R.d.S.); (L.J.C.A.); (F.F.F.)
- Diamond Light Source, Harwell Science & Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK;
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3
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Crosstalk between responsivities to various stimuli in multiresponsive polymers: change in polymer chain and external environment polarity as the key factor. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04576-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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4
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Moreno A, Ronda JC, Cádiz V, Galià M, Lligadas G, Percec V. pH-Responsive Micellar Nanoassemblies from Water-Soluble Telechelic Homopolymers Endcoding Acid-Labile Middle-Chain Groups in Their Hydrophobic Sequence-Defined Initiator Residue. ACS Macro Lett 2019; 8:1200-1208. [PMID: 35619448 DOI: 10.1021/acsmacrolett.9b00572] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A middle-chain cleavable telechelic poly(oligoethylene glycol) methyl ether acrylate) (MCCT-POEGA-Br) was synthesized by single-electron transfer living radical polymerization (SET-LRP) initiated from an acetal-containing hydrophobic sequence-defined difunctional initiator. In aqueous medium, above a certain concentration, this hydrophilic homopolymer self-assembled into nanogel-like large micelles that exhibit an encapsulating capacity for both hydrophobic and hydrophilic cargo. The sequence-defined cleavage pattern encoded in the initiator residue allowed precise middle-chain cleavage, leading to quantitative disassembly of the corresponding nanoobjects. Dye release studies performed in an acidic environment demonstrated the potential of this new design concept in the preparation of pH-responsive nanocarriers. In addition, fluorescently tagged nanoassemblies could also be obtained via the thio-bromo "click" modification of MCCT-POEGA-Br prior to self-assembly. This strategy may provide facile access to a diversity of multistimuli-responsive nanocarriers based on commercially available hydrophilic monomers and sequence-defined difunctional initiators synthesized by this simple design strategy.
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Affiliation(s)
- Adrian Moreno
- Laboratory of Sustainable Polymers, Department of Analytical Chemistry and Organic Chemistry, University Rovira i Virgili, Tarragona 43007, Spain
| | - Juan C. Ronda
- Laboratory of Sustainable Polymers, Department of Analytical Chemistry and Organic Chemistry, University Rovira i Virgili, Tarragona 43007, Spain
| | - Virginia Cádiz
- Laboratory of Sustainable Polymers, Department of Analytical Chemistry and Organic Chemistry, University Rovira i Virgili, Tarragona 43007, Spain
| | - Marina Galià
- Laboratory of Sustainable Polymers, Department of Analytical Chemistry and Organic Chemistry, University Rovira i Virgili, Tarragona 43007, Spain
| | - Gerard Lligadas
- Laboratory of Sustainable Polymers, Department of Analytical Chemistry and Organic Chemistry, University Rovira i Virgili, Tarragona 43007, Spain
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Virgil Percec
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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Hriberšek P, Kogej K. Tacticity and Counterion Modulated Temperature Response of Weak Polyelectrolytes: The Case of Poly(methacrylic acid) Stereoisomers in Aqueous Solutions. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01467] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Patricija Hriberšek
- Department of Chemistry and Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana SI-1000, Slovenia
| | - Ksenija Kogej
- Department of Chemistry and Biochemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana SI-1000, Slovenia
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Jäger A, Jäger E, Giacomelli FC, Nallet F, Steinhart M, Putaux JL, Konefał R, Spěváček J, Ulbrich K, Štěpánek P. Structural changes on polymeric nanoparticles induced by hydrophobic drug entrapment. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.10.059] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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7
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8
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Biodegradable nanoparticles as nanomedicines: are drug-loading content and release mechanism dictated by particle density? Colloid Polym Sci 2017. [DOI: 10.1007/s00396-016-4007-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Sappidi P, Natarajan U. Effect of salt valency and concentration on structure and thermodynamic behavior of anionic polyelectrolyte Na +-polyethacrylate aqueous solution. J Mol Model 2016; 22:274. [PMID: 27783231 DOI: 10.1007/s00894-016-3144-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 10/09/2016] [Indexed: 11/24/2022]
Abstract
The intermolecular structure and solvation enthalpy of anionic polyelectrolyte atactic Na+-polyethacrylate (PEA) in aqueous solution, as a function of added salt concentration C s (dilute to concentrated) and valency (NaCl versus CaCl2), were investigated via molecular dynamics simulations with explicit-ion-solvent and atomistic polymer description. An increase in C s leads to a decrease in α, which stabilizes to a constant value beyond critical C s. A significant reduction in R g in the presence of CaCl2 salt was observed, due to ion bridging of PEA by Ca2+ ions, in agreement with results available in literature on other similar polycarboxylates. An increase in salt valency reduces the value of critical C s for the onset of stabilization of the overall size and shape of the polymer chain. The critical C s ratio for the divalent to monovalent salt case is in excellent agreement with results of Langevin dynamics studies on model systems available in the literature. PEA-water H-bond half-life increases with C s for CaCl2, but no appreciable effect is seen for NaCl. The hydration of PEA becomes stronger in the presence of divalent salt. The strength of H-bond interaction energy is greater for cations as compared to anions of the salt. The salt cation effect in displacing water molecules from the vicinity of PEA, with increase in C s, is greater for NaCl solution. The decrease in water coordination to PEA carboxylate groups, due to increased C s, is more pronounced in NaCl solution. The nature of the behavior of the solvation enthalpy of PEA and the type of intermolecular interactions contributing to it, is in agreement with experimental observations from the literature. The hydration enthalpy of PEA in divalent CaCl2 aqueous salt solution is more exothermic compared to monovalent NaCl salt solution, in agreement with experimental data. The solvation of PEA is thermodynamically more favorable in the case of CaCl2 solution. The exothermic solvation enthalpy, H-bond lifetime, number of H-bonds and H-bond interaction energy are greater in magnitude in CaCl2 aqueous solution.
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Affiliation(s)
- Praveenkumar Sappidi
- Macromolecular Modeling and Simulation Laboratory, Department of Chemical Engineering, Indian Institute of Technology (IIT) Madras, Chennai, 600036, India
| | - Upendra Natarajan
- Macromolecular Modeling and Simulation Laboratory, Department of Chemical Engineering, Indian Institute of Technology (IIT) Madras, Chennai, 600036, India.
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de Castro CE, Bonvent JJ, da Silva MCC, Castro FLF, Giacomelli FC. Influence of Structural Features on the Cellular Uptake Behavior of Non-Targeted Polyester-Based Nanocarriers. Macromol Biosci 2016; 16:1643-1652. [DOI: 10.1002/mabi.201600138] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 07/04/2016] [Indexed: 01/31/2023]
Affiliation(s)
- Carlos E. de Castro
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; 09210-170 Santo André Brazil
| | - Jean-Jacques Bonvent
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; 09210-170 Santo André Brazil
| | - Maria C. C. da Silva
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; 09210-170 Santo André Brazil
| | - Fabiane L. F. Castro
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; 09210-170 Santo André Brazil
| | - Fernando C. Giacomelli
- Centro de Ciências Naturais e Humanas; Universidade Federal do ABC; 09210-170 Santo André Brazil
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11
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Huang H, Liao Y, Bu W, Wang W, Sun JZ. Going beyond the classical amphiphilicity paradigm: the self-assembly of completely hydrophobic polymers into free-standing sheets and hollow nanostructures in solvents of variable quality. SOFT MATTER 2016; 12:5011-5021. [PMID: 27157546 DOI: 10.1039/c6sm00259e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Self-assembly is well-known to occur in amphiphiles, and the totally hydrophobic ones are never reported to self-assemble. In this work we report for the first time that the latter can self-assemble into free-standing sheets and hollow spheres in toluene/methanol mixed solvents by modulating the solvent quality. The homopolymers studied in this work are polystyrene (PS), polyphenylacetylene (PPA), and poly(3-hexyl thiophene) (P3HT), representing polymers with different rigidity. All the three form a homogenous solution in toluene, but self-assembly occurs in the toluene/methanol mixed solvents. Micrometer sized free-standing sheets were formed for PS, PPA, and P3HT at methanol volume fractions being 43%, 50%, and 67%, respectively, and hollow spheres were observed for PPA at higher methanol fractions of 75 and 90%. Under the latter solvent conditions, PS forms solid spheres, yet ill-defined aggregates and free-standing sheets coexist in the case of P3HT. This non-solvent induced self-assembly was explained by a delicate balance of two "opposing forces": van der Waals attractive and entropic repulsive forces generated between the segments of these homopolymers within a single chain, between two chains, and among more chains in the solvents of worsened quality.
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Affiliation(s)
- Huanting Huang
- Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, China.
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12
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Sedlák M. A novel approach to controlled self-assembly of pH-responsive thermosensitive homopolymer polyelectrolytes into stable nanoparticles. Adv Colloid Interface Sci 2016; 232:57-69. [PMID: 26792020 DOI: 10.1016/j.cis.2015.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 12/07/2015] [Accepted: 12/08/2015] [Indexed: 12/14/2022]
Abstract
This review addresses the recent research progress in introducing and elaborating a novel approach to controlled polymer self-assembly into stable nanoparticles using pH-responsive thermosensitive homopolymer polyelectrolytes. Interesting aspect of this approach is that stable polymeric nanoparticles are formed from homopolymers of one type only and without any assembly-triggering additives. The process of their formation can be monitored online e.g. by light scattering and particle size can be finely custom tuned. Obtained nanoparticles have interesting properties and are very stable over long periods of time and over a broad range of salt concentrations including physiological conditions. Much effort was devoted not only to finding optimum experimental protocols and to characterizing resulting nanoparticles in detail, but also to understanding physical processes behind these successful protocols.
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13
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Albuquerque LJC, Annes K, Milazzotto MP, Mattei B, Riske KA, Jäger E, Pánek J, Štěpánek P, Kapusta P, Muraro PIR, De Freitas AGO, Schmidt V, Giacomelli C, Bonvent JJ, Giacomelli FC. Efficient Condensation of DNA into Environmentally Responsive Polyplexes Produced from Block Catiomers Carrying Amine or Diamine Groups. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:577-586. [PMID: 26677726 DOI: 10.1021/acs.langmuir.5b04080] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The intracellular delivery of nucleic acids requires a vector system as they cannot diffuse across lipid membranes. Although polymeric transfecting agents have been extensively investigated, none of the proposed gene delivery vehicles fulfill all of the requirements needed for an effective therapy, namely, the ability to bind and compact DNA into polyplexes, stability in the serum environment, endosome-disrupting capacity, efficient intracellular DNA release, and low toxicity. The challenges are mainly attributed to conflicting properties such as stability vs efficient DNA release and toxicity vs efficient endosome-disrupting capacity. Accordingly, investigations aimed at safe and efficient therapies are still essential to achieving gene therapy clinical success. Taking into account the mentioned issues, herein we have evaluated the DNA condensation ability of poly(ethylene oxide)113-b-poly[2-(diisopropylamino)ethyl methacrylate]50 (PEO113-b-PDPA50), poly(ethylene oxide)113-b-poly[2-(diethylamino)ethyl methacrylate]50 (PEO113-b-PDEA50), poly[oligo(ethylene glycol)methyl ether methacrylate]70-b-poly[oligo(ethylene glycol)methyl ether methacrylate10-co-2-(diethylamino)ethyl methacrylate47-co-2-(diisopropylamino)ethyl methacrylate47] (POEGMA70-b-P(OEGMA10-co-DEA47-co-DPA47), and poly[oligo(ethylene glycol)methyl ether methacrylate]70-b-poly{oligo(ethylene glycol)methyl ether methacrylate10-co-2-methylacrylic acid 2-[(2-(dimethylamino)ethyl)methylamino]ethyl ester44} (POEGMA70-b-P(OEGMA10-co-DAMA44). Block copolymers PEO113-b-PDEA50 and POEGMA70-b-P(OEGMA10-co-DEA47-co-DPA47) were evidenced to properly condense DNA into particles with a desirable size for cellular uptake via endocytic pathways (R(H) ≈ 65-85 nm). The structure of the polyplexes was characterized in detail by scattering techniques and atomic force microscopy. The isothermal titration calorimetric data revealed that the polymer/DNA binding is endothermic; therefore, the process in entropically driven. The combination of results supports that POEGMA70-b-P(OEGMA10-co-DEA47-co-DPA47) condenses DNA more efficiently and with higher thermodynamic outputs than does PEO113-b-PDEA50. Finally, circular dichroism spectroscopy indicated that the conformation of DNA remained the same after complexation and that the polyplexes are very stable in the serum environment.
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Affiliation(s)
- Lindomar J C Albuquerque
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC , Santo André 09210-170, Brazil
| | - Kelly Annes
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC , Santo André 09210-170, Brazil
| | - Marcella P Milazzotto
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC , Santo André 09210-170, Brazil
| | - Bruno Mattei
- Departamento de Biofísica, Universidade Federal de São Paulo , São Paulo 04021-001, Brazil
| | - Karin A Riske
- Departamento de Biofísica, Universidade Federal de São Paulo , São Paulo 04021-001, Brazil
| | - Eliézer Jäger
- Institute of Macromolecular Chemistry AS CR , 162 06 Prague, Czech Republic
| | - Jiří Pánek
- Institute of Macromolecular Chemistry AS CR , 162 06 Prague, Czech Republic
| | - Petr Štěpánek
- Institute of Macromolecular Chemistry AS CR , 162 06 Prague, Czech Republic
| | - Peter Kapusta
- J. Heyrovsky Institute of Physical Chemistry, 182 23 Prague, Czech Republic
| | - Paulo I R Muraro
- Departamento de Química, Universidade Federal de Santa Maria , Santa Maria 97105-900, Brazil
| | - Augusto G O De Freitas
- Departamento de Química, Universidade Federal de Santa Maria , Santa Maria 97105-900, Brazil
| | - Vanessa Schmidt
- Departamento de Química, Universidade Federal de Santa Maria , Santa Maria 97105-900, Brazil
| | - Cristiano Giacomelli
- Departamento de Química, Universidade Federal de Santa Maria , Santa Maria 97105-900, Brazil
| | - Jean-Jacques Bonvent
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC , Santo André 09210-170, Brazil
| | - Fernando C Giacomelli
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC , Santo André 09210-170, Brazil
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14
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Costa FN, Ibiapino AL, de Figueiredo LP, Barreiro EJ, Lima LM, do Amaral DN, de Castro CE, Giacomelli FC, Ferreira FF. Preliminary evaluation of the encapsulation of new antidiabetic sulphonylhydrazone and antitumor N-acylhydrazone derivatives using PLGA nanoparticles. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/1742-6596/617/1/012015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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15
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Liu T, Tian W, Zhu Y, Bai Y, Yan H, Du J. How does a tiny terminal alkynyl end group drive fully hydrophilic homopolymers to self-assemble into multicompartment vesicles and flower-like complex particles? Polym Chem 2014. [DOI: 10.1039/c4py00501e] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report an unusual self-assembly behavior driven by a tiny terminal alkynyl end group in fully hydrophilic homopolymers which form multicompartment vesicles and flower-like nanoparticles in aqueous solution.
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Affiliation(s)
- Tingting Liu
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an, P. R. China
| | - Wei Tian
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an, P. R. China
| | - Yunqing Zhu
- School of Materials Science and Engineering
- Tongji University
- Shanghai, China
| | - Yang Bai
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an, P. R. China
| | - Hongxia Yan
- The Key Laboratory of Space Applied Physics and Chemistry
- Ministry of Education and Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an, P. R. China
| | - Jianzhong Du
- School of Materials Science and Engineering
- Tongji University
- Shanghai, China
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16
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Sedlak M, Falus P, Steinhart M, Gummel J, Stepanek P, Filippov SK. Temperature-Induced Formation of Polymeric Nanoparticles: In Situ SAXS and QENS Experiments. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201300415] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Marian Sedlak
- Institute of Experimental Physics, Slovak Academy of Sciences; Watsonova 47 Kosice 04001 Slovakia
| | - Peter Falus
- Institut Laue-Langevin, 6 Rue Jules Horowitz; Grenoble Cedex 9 38042 France
| | - Milos Steinhart
- Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2, 162 06 Prague 6 Czech Republic
| | - Jeremie Gummel
- European Synchrotron Radiation Facility, BP 220; Grenoble Cedex 9 38042 France
| | - Petr Stepanek
- Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2, 162 06 Prague 6 Czech Republic
| | - Sergey K. Filippov
- Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic; Heyrovsky Sq. 2, 162 06 Prague 6 Czech Republic
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17
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Sappidi P, Muralidharan SS, Natarajan U. Conformations and hydration structure of hydrophobic polyelectrolyteatacticpoly(ethacrylic acid) in dilute aqueous solution as a function of neutralisation. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2013.803551] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Peng B, Grishkewich N, Yao Z, Han X, Liu H, Tam KC. Self-Assembly Behavior of Thermoresponsive Oligo(ethylene glycol) Methacrylates Random Copolymer. ACS Macro Lett 2012; 1:632-635. [PMID: 35607076 DOI: 10.1021/mz300135x] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A well-defined random copolymer containing 2-(2-methoxyethoxy) ethyl methacrylate (MEO2MA, Mn = 188 g/mol) and poly(ethylene glycol) methyl ether methacrylate (PEGMA, Mn = 2080 g/mol) (poly(MEO2MA-co-PEGMA2080)), Mn = 17300 g/mol) was synthesized using the atom transfer radical polymerization (ATRP) process, and its thermoresponsive behaviors in aqueous solution were investigated. In comparison to other temperature-sensitive random copolymers based on oligo(ethylene glycol) methacrylates, this copolymer exhibited an unusual thermally induced two-stage aggregation process. The copolymer chains associate at the first thermal transition followed by a rearrangement process at the second thermal transition to produce a stable core-shell micellar structure. The morphology of the micelle comprises of a methacrylate core stabilized by the longer ethylene glycol segments (Mn = 2080 g/mol) shell.
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Affiliation(s)
- Baoliang Peng
- Department of Chemical
Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West,
Waterloo, Ontario, Canada N2L 3G1
- Department of Chemistry, East China University of Science and Technology, 130 Meilong
Road, Shanghai 200237, People's Republic of China
| | - Nathan Grishkewich
- Department of Chemical
Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West,
Waterloo, Ontario, Canada N2L 3G1
| | - Zhaoling Yao
- Department of Chemical
Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West,
Waterloo, Ontario, Canada N2L 3G1
| | - Xia Han
- Department of Chemistry, East China University of Science and Technology, 130 Meilong
Road, Shanghai 200237, People's Republic of China
| | - Honglai Liu
- Department of Chemistry, East China University of Science and Technology, 130 Meilong
Road, Shanghai 200237, People's Republic of China
| | - Kam C. Tam
- Department of Chemical
Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West,
Waterloo, Ontario, Canada N2L 3G1
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19
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Sedlák M. Homopolymer self-assembly into stable nanoparticles: concerted action of hydrophobic association and hydrogen bonding in thermoresponsive poly(alkylacrylic acid)s. J Phys Chem B 2012; 116:2356-64. [PMID: 22280359 DOI: 10.1021/jp208445p] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A new approach to polymer self-assembly was presented recently [M. Sedlák, Č. Koňák, J. Dybal, Macromolecules 2009, 2, 7430-7438 and 7439-7446.] (1, 2) where stable polymeric nanoparticles were formed from poly(ethylacrylic acid) homopolymers without any assembly triggering additives, simply by heating polymer solution under conditions of thermosensitivity to certain temperature. In the current Article, we present successful results on poly(propylacrylic acid), which is a more hydrophobic polymer. We also present results on a less hydrophobic polymer from this series, poly(methacrylic acid), from which nanoparticles cannot be formed. Comparison of results on all three polymers gives a solid physicochemical insight and supports the molecular mechanism of the self-assembly previously suggested: The solvent quality gradually worsens upon heating of a thermosensitive polymer solution, and polymer-polymer contacts are preferred over polymer-solvent contacts, which leads to the formation of polymer assemblies. The presence of a significant amount of charge on chains prevents macroscopic phase separation. Upon subsequent cooling to laboratory temperature, the assemblies (nanoparticles) should eventually dissolve; however, this is not the case due to the fact that polymer chains brought to a close proximity at elevated temperatures become hydrogen-bonded. In addition, hydrogen bonds strengthen upon cooling. Mainly carboxylic-carboxylate hydrogen bonds (COOH····COO(-)) are responsible for the irreversibility of the process and the stability of nanoparticles. Conclusions are supported by results from static and dynamic light scattering, FTIR spectroscopy, and cryo-TEM microscopy. Size of nanoparticles can be monitored during the growth and custom-tailored by tuning critical parameters, especially the degree of ionization, temperature, and time of heating. Nanoparticles are stable over long periods of time. They are stable in a broad range of salt concentrations, including physiological conditions, and possess a mild acceptable degree of polydispersity.
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Affiliation(s)
- Marián Sedlák
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia.
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Štěpánek M, Hajduová J, Procházka K, Šlouf M, Nebesářová J, Mountrichas G, Mantzaridis C, Pispas S. Association of poly(4-hydroxystyrene)-block-poly(ethylene oxide) in aqueous solutions: block copolymer nanoparticles with intermixed blocks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:307-13. [PMID: 22107340 DOI: 10.1021/la203946s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Association behavior of diblock copolymer poly(4-hydroxystyrene)-block-poly(ethylene oxide) (PHOS-PEO) in aqueous solutions and solutions in water/tetrahydrofuran mixtures was studied by static, dynamic, and electrophoretic light scattering, (1)H NMR spectroscopy, transmission electron microscopy, and cryogenic field-emission scanning electron microscopy. It was found that, in alkaline aqueous solutions, PHOS-PEO can form compact spherical nanoparticles whose size depends on the preparation protocol. Instead of a core/shell structure with segregated blocks, the PHOS-PEO nanoparticles have intermixed PHOS and PEO blocks due to hydrogen bond interaction between -OH groups of PHOS and oxygen atoms of PEO and are stabilized electrostatically by a fraction of ionized PHOS units on the surface.
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Affiliation(s)
- Miroslav Štěpánek
- Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic.
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Longenecker R, Mu T, Hanna M, Burke NAD, Stöver HDH. Thermally Responsive 2-Hydroxyethyl Methacrylate Polymers: Soluble–Insoluble and Soluble–Insoluble–Soluble Transitions. Macromolecules 2011. [DOI: 10.1021/ma201528r] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Ryan Longenecker
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4M1
| | - Tingting Mu
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4M1
| | - Mark Hanna
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4M1
| | - Nicholas A. D. Burke
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4M1
| | - Harald D. H. Stöver
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4M1
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Radchenko SS, Novakov IA, Radchenko PS, Van Cong L, Ozerin AS, Zel'tser PS. Interaction of aluminoxane particles with weakly charged cationic polyelectrolytes. J Appl Polym Sci 2011. [DOI: 10.1002/app.33597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Formation of polymer–colloid complexes of aluminoxane particles with poly(acrylic acid) and its copolymers with acrylamide. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2446-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Masci G, De Santis S, Cametti C. Dielectric Properties of Micellar Aggregates Due to the Self-Assembly of Thermoresponsive Diblock Copolymers. J Phys Chem B 2011; 115:2196-204. [DOI: 10.1021/jp111135f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Qiao ZY, Du FS, Zhang R, Liang DH, Li ZC. Biocompatible Thermoresponsive Polymers with Pendent Oligo(ethylene glycol) Chains and Cyclic Ortho Ester Groups. Macromolecules 2010. [DOI: 10.1021/ma101090g] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zeng-Ying Qiao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Fu-Sheng Du
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Rui Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - De-Hai Liang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
| | - Zi-Chen Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, P. R. China
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DOI M, YUSA SI, SHIMADA Y, KOUSAKA S. Synthesis of a ABC Triblock Copolymer Showing a pH-Responsive Multiple Association Behavior. KOBUNSHI RONBUNSHU 2010. [DOI: 10.1295/koron.67.341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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