1
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Samaro A, Vergaelen M, Purino M, Tigrine A, de la Rosa VR, Goudarzi NM, Boone MN, Vanhoorne V, Hoogenboom R, Vervaet C. Poly(2-alkyl-2-oxazoline)s: A polymer platform to sustain the release from tablets with a high drug loading. Mater Today Bio 2022; 16:100414. [PMID: 36133793 PMCID: PMC9483731 DOI: 10.1016/j.mtbio.2022.100414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 08/24/2022] [Accepted: 08/28/2022] [Indexed: 11/25/2022] Open
Abstract
Sustaining the release of highly dosed APIs from a matrix tablet is challenging. To address this challenge, this study evaluated the performance of thermoplastic poly (2-alkyl-2-oxazoline)s (PAOx) as matrix excipient to produce sustained-release tablets via three processing routes: (a) hot-melt extrusion (HME) combined with injection molding (IM), (b) HME combined with milling and compression and (c) direct compression (DC). Different PAOx (co-)polymers and polymer mixtures were processed with several active pharmaceutical ingredients having different aqueous solubilities and melting temperatures (metoprolol tartrate (MPT), metformin hydrochloride (MTF) and theophylline anhydrous (THA)). Different PAOx grades were synthesized and purified by the Supramolecular Chemistry Group, and the effect of PAOx grade and processing technique on the in vitro release kinetics was evaluated. Using the hydrophobic poly (2-n-propyl-2-oxazoline) (PnPrOx) as a matrix excipient allowed to sustain the release of different APIs, even at a 70% (w/w) drug load. Whereas complete THA release was not achieved from the PnPrOx matrix over 24 h regardless of the processing technique, adding 7.5% w/w of the hydrophilic poly (2-ethyl-2-oxazoline) to the hydrophobic PnPrOx matrix significantly increased THA release, highlighting the relevance of mixing different PAOx grades. In addition, it was demonstrated that the release of THA was similar from co-polymer and polymer mixtures with the same polymer ratios. On the other hand, as the release of MTF from a PnPrOx matrix was fast, the more hydrophobic poly (2-sec-butyl-2-oxazoline) (PsecBuOx) was used to retard MTF release. In addition, a mixture between the hydrophilic PEtOx and the hydrophobic PsecBuOx allowed accurate tuning of the release of MTF formulations. Finally, it was demonstrated that PAOx also showed a high ability to tune the in vivo release. IM tablets containing 70% MTF and 30% PsecBuOx showed a lower in vivo bioavailability compared to IM tablets containing a low PEtOx concentration (7.5%, w/w) in combination with PsecBuOx (22.5%, w/w). Importantly, the in vivo MTF blood level from the sustained release tablets correlated well with the in vitro release profiles. In general, this work demonstrates that PAOx polymers offer a versatile formulation platform to adjust the release rate of different APIs, enabling sustained release from tablets with up to 70% w/w drug loading.
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Affiliation(s)
- Aseel Samaro
- Laboratory of Pharmaceutical Technology, Ghent University, Ottergemsesteenweg, 460 9000, Ghent, Belgium
| | - Maarten Vergaelen
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4 9000 Ghent University, Ghent, Belgium
| | - Martin Purino
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4 9000 Ghent University, Ghent, Belgium
| | - Ali Tigrine
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4 9000 Ghent University, Ghent, Belgium
| | - Victor R de la Rosa
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4 9000 Ghent University, Ghent, Belgium.,Avroxa BV., Technologiepark-Zwijnaarde, Ghent, Belgium
| | - Niloofar Moazami Goudarzi
- Radiation Physics Research Group, Department of Physics and Astronomy, Ghent University, Belgium.,Center for X-ray Tomography (UGCT), Ghent University, Ghent, Belgium
| | - Matthieu N Boone
- Radiation Physics Research Group, Department of Physics and Astronomy, Ghent University, Belgium.,Center for X-ray Tomography (UGCT), Ghent University, Ghent, Belgium
| | - Valérie Vanhoorne
- Laboratory of Pharmaceutical Technology, Ghent University, Ottergemsesteenweg, 460 9000, Ghent, Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Krijgslaan 281-S4 9000 Ghent University, Ghent, Belgium
| | - Chris Vervaet
- Laboratory of Pharmaceutical Technology, Ghent University, Ottergemsesteenweg, 460 9000, Ghent, Belgium
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2
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Kohlan TB, Atespare AE, Yildiz M, Menceloglu YZ, Unal S, Dizman B. Synthesis and Structure-Property Relationship of Amphiphilic Poly(2-ethyl- co-2-(alkyl/aryl)-2-oxazoline) Copolymers. ACS OMEGA 2022; 7:40067-40077. [PMID: 36385860 PMCID: PMC9648074 DOI: 10.1021/acsomega.2c04809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Poly(2-oxazoline)s (POZs) are widely investigated for their applications in various fields due to their unique properties. To exploit and combine different characteristics of the POZ family, 2-oxazoline monomers can be copolymerized to prepare tailor-made copolymers with the desired glass transition temperature (T g), melting temperature (T m), amphiphilicity, and functionality. Here, we report the synthesis and characterization of 2-oxazoline monomers and a range of POZ copolymers produced, thereof. 2-Propyl-2-oxazoline (PrOZ) and 2-pentyl-2-oxazoline (PeOZ) monomers were synthesized by two different methods starting from nitriles or carboxylic acids. A number of POZ copolymers were synthesized by copolymerization of 2-ethyl-2-oxazoline (EOZ) with either one of PrOZ, PeOZ, or 2-phenyl-2-oxazoline (PhOZ) at three different compositions (25:75, 50:50, and 75:25) and three molecular weights (1000, 2000, and 5000 Da). The successful synthesis of the monomers and copolymers was demonstrated through their structural analysis by 1H NMR and FTIR. SEC results confirmed the targeted molar masses of the copolymers and living nature of the polymerization by showing low dispersity values. Thermal properties of the copolymers were studied using DSC and TGA. DSC studies revealed the amorph and random state of the copolymers with obtained T g values for the copolymers in the range of -3 to 84 °C depending on their molecular weight and type of the side chain. While the presence of longer aliphatic side chains resulted in lower T g values, the presence of 2-phenyl substituents on the polymer led to higher T g values. The decomposition temperatures determined by TGA were in the range of 328 to 383 °C depending on the molecular weight, composition, and side chain of the copolymers. It was observed that higher molecular weights led to higher T g values and decomposition temperatures. While copolymers with aliphatic side chains exhibited a single-step decomposition profile, the decomposition of copolymers having aromatic side chains occurred in multiple steps. The variations in the molecular weight, composition, and side chains of the copolymers resulted in a library of tailorable amphiphilic copolymers suitable for multiple applications ranging from biomedical applications to composite manufacturing.
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Affiliation(s)
- Taha Behroozi Kohlan
- Integrated
Manufacturing Technologies Research and Application Center & Composite
Technologies Center of Excellence, Sabanci
University, Istanbul 34956, Turkey
- Faculty
of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, Istanbul 34956, Turkey
| | - Asu Ece Atespare
- Integrated
Manufacturing Technologies Research and Application Center & Composite
Technologies Center of Excellence, Sabanci
University, Istanbul 34956, Turkey
- Faculty
of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, Istanbul 34956, Turkey
| | - Mehmet Yildiz
- Integrated
Manufacturing Technologies Research and Application Center & Composite
Technologies Center of Excellence, Sabanci
University, Istanbul 34956, Turkey
- Faculty
of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, Istanbul 34956, Turkey
| | - Yusuf Ziya Menceloglu
- Integrated
Manufacturing Technologies Research and Application Center & Composite
Technologies Center of Excellence, Sabanci
University, Istanbul 34956, Turkey
- Faculty
of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, Istanbul 34956, Turkey
| | - Serkan Unal
- Integrated
Manufacturing Technologies Research and Application Center & Composite
Technologies Center of Excellence, Sabanci
University, Istanbul 34956, Turkey
- Faculty
of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, Istanbul 34956, Turkey
| | - Bekir Dizman
- Integrated
Manufacturing Technologies Research and Application Center & Composite
Technologies Center of Excellence, Sabanci
University, Istanbul 34956, Turkey
- Faculty
of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, Istanbul 34956, Turkey
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3
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Oleszko-Torbus N. Recent Advances in Modifications, Properties and Applications of 2-Isopropyl-2-Oxazoline (Co)Polymers. POLYM REV 2021. [DOI: 10.1080/15583724.2021.1993252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Warne NM, Finnegan JR, Feeney OM, Kempe K. Using
2‐isopropyl
‐2‐oxazine to explore the effect of monomer distribution and polymer architecture on the thermoresponsive behavior of copolymers. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210551] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Nicole M. Warne
- ARC Centre of Excellence in Convergent Bio‐Nano Science & Technology, and Drug Delivery, Disposition and Dynamics Monash Institute of Pharmaceutical Sciences, Monash University Parkville Victoria Australia
| | - John R. Finnegan
- ARC Centre of Excellence in Convergent Bio‐Nano Science & Technology, and Drug Delivery, Disposition and Dynamics Monash Institute of Pharmaceutical Sciences, Monash University Parkville Victoria Australia
| | - Orlagh M. Feeney
- ARC Centre of Excellence in Convergent Bio‐Nano Science & Technology, and Drug Delivery, Disposition and Dynamics Monash Institute of Pharmaceutical Sciences, Monash University Parkville Victoria Australia
| | - Kristian Kempe
- ARC Centre of Excellence in Convergent Bio‐Nano Science & Technology, and Drug Delivery, Disposition and Dynamics Monash Institute of Pharmaceutical Sciences, Monash University Parkville Victoria Australia
- Materials Science and Engineering Monash University Clayton Victoria Australia
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5
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Oleszko-Torbus N, Mendrek B, Kowalczuk A, Wałach W, Trzebicka B, Utrata-Wesołek A. The Role of Polymer Structure in Formation of Various Nano- and Microstructural Materials: 30 Years of Research in the Laboratory of Nano- and Microstructural Materials at the Centre of Polymer and Carbon Materials PAS. Polymers (Basel) 2021; 13:2892. [PMID: 34502932 PMCID: PMC8434041 DOI: 10.3390/polym13172892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 11/16/2022] Open
Abstract
The review summarizes the research carried out in the Laboratory of Nano- and Microstructural Materials at the Centre of Polymer and Carbon Materials, Polish Academy of Sciences (CMPW PAS). Studies carried out for many years under the guidance of Professor Andrzej Dworak led to the development and exploration of the mechanisms of oxirane and cyclic imine polymerization and controlled radical polymerization of methacrylate monomers. Based on that knowledge, within the last three decades, macromolecules with the desired composition, molar mass and topology were obtained and investigated. The ability to control the structure of the synthesized polymers turned out to be important, as it provided a way to tailor the physiochemical properties of the materials to their specific uses. Many linear polymers and copolymers as well as macromolecules with branched, star, dendritic and hyperbranched architectures were synthesized. Thanks to the applied controlled polymerization techniques, it was possible to obtain hydrophilic, hydrophobic, amphiphilic and stimulus-sensitive polymers. These tailor-made polymers with controlled properties were used for the construction of various types of materials, primarily on the micro- and nanoscales, with a wide range of possible applications, mainly in biomedicine. The diverse topology of polymers, and thus their properties, made it possible to obtain various types of polymeric nanostructures and use them as nanocarriers by encapsulation of biologically active substances. Additionally, polymer layers were obtained with features useful in medicine, particularly regenerative medicine and tissue engineering.
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Affiliation(s)
| | | | | | | | - Barbara Trzebicka
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 41-819 Zabrze, Poland; (N.O.-T.); (B.M.); (A.K.); (W.W.)
| | - Alicja Utrata-Wesołek
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 41-819 Zabrze, Poland; (N.O.-T.); (B.M.); (A.K.); (W.W.)
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6
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Finnegan JR, Pilkington EH, Alt K, Rahim MA, Kent SJ, Davis TP, Kempe K. Stealth nanorods via the aqueous living crystallisation-driven self-assembly of poly(2-oxazoline)s. Chem Sci 2021; 12:7350-7360. [PMID: 34163824 PMCID: PMC8171341 DOI: 10.1039/d1sc00938a] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 04/10/2021] [Indexed: 11/21/2022] Open
Abstract
The morphology of nanomaterials critically influences their biological interactions. However, there is currently a lack of robust methods for preparing non-spherical particles from biocompatible materials. Here, we combine 'living' crystallisation-driven self-assembly (CDSA), a seeded growth method that enables the preparation of rod-like polymer nanoparticles, with poly(2-oxazoline)s (POx), a polymer class that exhibits 'stealth' behaviour and excellent biocompatibility. For the first time, the 'living' CDSA process was carried out in pure water, resulting in POx nanorods with lengths ranging from ∼60 to 635 nm. In vitro and in vivo study revealed low immune cell association and encouraging blood circulation times, but little difference in the behaviour of POx nanorods of different length. The stealth behaviour observed highlights the promising potential of POx nanorods as a next generation stealth drug delivery platform.
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Affiliation(s)
- John R Finnegan
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University Parkville Victoria 3052 Australia
| | - Emily H Pilkington
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University Parkville Victoria 3052 Australia
- ARC Centre of Excellence in Convergent Bio-Nano Science, Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne Parkville Victoria 3010 Australia
| | - Karen Alt
- NanoTheranostics Laboratory, Australian Centre for Blood Diseases, Monash University Melbourne Victoria 3004 Australia
| | - Md Arifur Rahim
- School of Chemical Engineering, University of New South Wales (UNSW) Sydney NSW 2052 Australia
| | - Stephen J Kent
- ARC Centre of Excellence in Convergent Bio-Nano Science, Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne Parkville Victoria 3010 Australia
| | - Thomas P Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University Parkville Victoria 3052 Australia
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland Brisbane QLD 4072 Australia
| | - Kristian Kempe
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University Parkville Victoria 3052 Australia
- Materials Science and Engineering, Monash University Clayton VIC 3800 Australia
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7
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Haler JRN, Far J, de la Rosa VR, Kune C, Hoogenboom R, De Pauw E. Using Ion Mobility-Mass Spectrometry to Extract Physicochemical Enthalpic and Entropic Contributions from Synthetic Polymers. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2021; 32:330-339. [PMID: 33269928 DOI: 10.1021/jasms.0c00349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Ion mobility-mass spectrometry (IM-MS) experiments are mostly used hand in hand with computational chemistry to correlate mobility measurements to the shape of the ions. Recently, we developed an automatable method to fit IM data obtained with synthetic homopolymers (i.e., collision cross sections; CCS) without resorting to computational chemistry. Here, we further develop the experimental IM data interpretation to explore physicochemical properties of a series of nine polymers and their monomer units by monitoring the relationship between the CCS and the degree of polymerization (DP). Several remarkable points of the CCS evolutions as a function of the DP were found: the first observed DP of each charge state (ΔDPfirst DP), the DPs constituting the structural rearrangements (ΔDPrearr), and the DPs at the half-rearrangement (DPhalf-rearr). Given that these remarkable points do not rely on absolute CCS values, but on their relative evolution, they can be extracted from CCS or raw IM data without accurate IM calibration. Properties such as coordination numbers of the cations, steric hindrance, or side chain flexibility can be compared. This leads to fit parameter predictions based on the nature of the monomer unit. The interpretation of the fit parameters, extracted using solely experimental data, allows a rapid screening of the properties of the polymers.
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Affiliation(s)
- Jean R N Haler
- Mass Spectrometry Laboratory, University of Liège, MolSys Research unit, Quartier Agora, Allée du Six Aout 11, B-4000 Liège, Belgium
- LIST - Luxembourg Institute of Science and Technology, Materials Research and Technology Department, 41 rue du Brill, L-4422 Belvaux, Luxembourg
| | - Johann Far
- Mass Spectrometry Laboratory, University of Liège, MolSys Research unit, Quartier Agora, Allée du Six Aout 11, B-4000 Liège, Belgium
| | - Victor R de la Rosa
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium
| | - Christopher Kune
- Mass Spectrometry Laboratory, University of Liège, MolSys Research unit, Quartier Agora, Allée du Six Aout 11, B-4000 Liège, Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium
| | - Edwin De Pauw
- Mass Spectrometry Laboratory, University of Liège, MolSys Research unit, Quartier Agora, Allée du Six Aout 11, B-4000 Liège, Belgium
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8
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Otulakowski Ł, Kasprów M, Strzelecka A, Dworak A, Trzebicka B. Thermal Behaviour of Common Thermoresponsive Polymers in Phosphate Buffer and in Its Salt Solutions. Polymers (Basel) 2020; 13:E90. [PMID: 33379398 PMCID: PMC7795651 DOI: 10.3390/polym13010090] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 12/18/2020] [Accepted: 12/22/2020] [Indexed: 12/14/2022] Open
Abstract
Thermoresponsive polymers are a promising material for drug nanocarrier preparation, which makes the study of their aggregation in physiological conditions very important. In this paper, the thermal behaviour of the thermoresponsive polymers poly(N-isopropylacrylamide), poly(2-isopropyl-2-oxazoline-co-2-n-propyl-2-oxazoline) and poly[(2-hydroxyethyl methacrylate)-co-oligo(ethylene glycol) methyl ether methacrylate] were studied in phosphate buffer (PBS) and solutions of its salts in concentration as in PBS. The thermal response of the polymers was measured using UV-Vis and dynamic light scattering (DLS). The salts shifted the cloud point temperature (TCP) of the (co)polymers to higher values compared to the TCP of aqueous polymer solutions. In PBS and NaCl solutions, all polymers exhibited an unexpected and previously unreported transmittance profile. During heating, an additional aggregation of polymers appeared above the TCP accompanied by the formation of a precipitate. In monosodium phosphate solutions and pure water, the studied polymers showed lower critical solution temperature (LCST-type) behaviour. DLS measurements showed that a salt influenced the size of the resulting polymer particles. The sizes and stability of particles depended on the heating rate. In PBS and NaCl solutions, the size of particles in the dispersion decreased above 60 °C, and the precipitate appeared on the bottom of the cuvette. The additional aggregation of polymer and its falling out of solution may hinder the removal of carriers from the body and has to be taken into account when preparing nanocarriers.
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Affiliation(s)
| | | | | | | | - Barbara Trzebicka
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowskiej 34, 41-819 Zabrze, Poland; (Ł.O.); (M.K.); (A.S.); (A.D.)
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9
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Göppert NE, Kleinsteuber M, Weber C, Schubert US. Degradable Poly(2-oxazoline) Analogues from Partially Oxidized Poly(ethylene imine). Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c02143] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Natalie E. Göppert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Maximilian Kleinsteuber
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Christine Weber
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
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10
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Polymer structure and property effects on solid dispersions with haloperidol: Poly(N-vinyl pyrrolidone) and poly(2-oxazolines) studies. Int J Pharm 2020; 590:119884. [DOI: 10.1016/j.ijpharm.2020.119884] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 09/10/2020] [Accepted: 09/11/2020] [Indexed: 02/08/2023]
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11
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Unravelling the Miscibility of Poly(2-oxazoline)s: A Novel Polymer Class for the Formulation of Amorphous Solid Dispersions. Molecules 2020; 25:molecules25163587. [PMID: 32781768 PMCID: PMC7465563 DOI: 10.3390/molecules25163587] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 07/27/2020] [Accepted: 07/31/2020] [Indexed: 02/06/2023] Open
Abstract
Water-soluble polymers are still the most popular carrier for the preparation of amorphous solid dispersions (ASDs). The advantage of this type of carrier is the fast drug release upon dissolution of the water-soluble polymer and thus the initial high degree of supersaturation of the poorly soluble drug. Nevertheless, the risk for precipitation due to fast drug release is a phenomenon that is frequently observed. In this work, we present an alternative carrier system for ASDs where a water-soluble and water-insoluble carrier are combined to delay the drug release and thus prevent this onset of precipitation. Poly(2-alkyl-2-oxazoline)s were selected as a polymer platform since the solution properties of this polymer class depend on the length of the alkyl sidechain. Poly(2-ethyl-2-oxazoline) (PEtOx) behaves as a water-soluble polymer at body temperature, while poly(2-n-propyl-2-oxazoline) (PPrOx) and poly(2-sec-butyl-2-oxazoline) (PsecBuOx) are insoluble at body temperature. Since little was known about the polymer’s miscibility behaviour and especially on how the presence of a poorly-water soluble drug impacted their miscibility, a preformulation study was performed. Formulations were investigated with X-ray powder diffraction, differential scanning calorimetry (DSC) and solid-state nuclear magnetic resonance spectroscopy. PEtOx/PPrOx appeared to form an immiscible blend based on DSC and this was even more pronounced after heating. The six drugs that were tested in this work did not show any preference for one of the two phases. PEtOx/PsecBuOx on the other hand appeared to be miscible forming a homogeneous blend between the two polymers and the drugs.
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12
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Jana S, Uchman M. Poly(2-oxazoline)-based stimulus-responsive (Co)polymers: An overview of their design, solution properties, surface-chemistries and applications. Prog Polym Sci 2020. [DOI: 10.1016/j.progpolymsci.2020.101252] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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13
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Mahmoud AM, Morrow JP, Pizzi D, Nanayakkara S, Davis TP, Saito K, Kempe K. Nonionic Water-Soluble and Cytocompatible Poly(amide acrylate)s. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02267] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ayaat M. Mahmoud
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Joshua P. Morrow
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - David Pizzi
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Sepa Nanayakkara
- School of Chemistry, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Thomas P. Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Kei Saito
- School of Chemistry, Monash University, Wellington Road, Clayton, VIC 3800, Australia
| | - Kristian Kempe
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, and Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
- Materials Science and Engineering, Monash University, Clayton, VIC 3800, Australia
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14
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Oleszko-Torbus N, Utrata-Wesołek A, Bochenek M, Lipowska-Kur D, Dworak A, Wałach W. Thermal and crystalline properties of poly(2-oxazoline)s. Polym Chem 2020. [DOI: 10.1039/c9py01316d] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The review gathers together data concerning the influence of poly(2-substituted-2-oxazoline)s structure on their thermal and crystalline properties, and how this relationship can be adjusted in controlled manner.
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Affiliation(s)
| | | | - Marcelina Bochenek
- Centre of Polymer and Carbon Materials
- Polish Academy of Sciences
- 41-819 Zabrze
- Poland
| | - Daria Lipowska-Kur
- Centre of Polymer and Carbon Materials
- Polish Academy of Sciences
- 41-819 Zabrze
- Poland
| | - Andrzej Dworak
- Centre of Polymer and Carbon Materials
- Polish Academy of Sciences
- 41-819 Zabrze
- Poland
| | - Wojciech Wałach
- Centre of Polymer and Carbon Materials
- Polish Academy of Sciences
- 41-819 Zabrze
- Poland
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15
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Altıntaş Z, Beruhil Adatoz E, Ijaz A, Miko A, Demirel AL. Self-assembled poly(2-ethyl-2-oxazoline)/malonic acid hollow fibers in aqueous solutions. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109222] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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16
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Fael H, Ràfols C, Demirel AL. Poly(2-Ethyl-2-Oxazoline) as an Alternative to Poly(Vinylpyrrolidone) in Solid Dispersions for Solubility and Dissolution Rate Enhancement of Drugs. J Pharm Sci 2018; 107:2428-2438. [PMID: 29859957 DOI: 10.1016/j.xphs.2018.05.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/10/2018] [Accepted: 05/22/2018] [Indexed: 10/14/2022]
Abstract
Poly(2-ethyl-2-oxazoline) (PEOX), a biocompatible polymer considered as pseudopolypeptide, was introduced as a potential alternative to the commonly used polymer, poly(vinylpyrrolidone) (PVP) for the preparation of solid dispersion with a poorly soluble drug. Glipizide (GPZ), a Biopharmaceutical Classification System class II model drug, was selected for solubility and dissolution rate study. GPZ-polymer solid dispersions and physical mixtures were characterized and investigated by X-ray diffractometry, differential scanning calorimetry, scanning electron microscopy, and FTIR spectroscopy. The impact of polymers on crystal nucleation kinetics was studied, and PEOX exhibited strong inhibitory effect compared with PVP. Solubility and dissolution behavior of the prepared solid dispersions and their physical blends were in vitro examined and evaluated. A significant enhancement in GPZ solubility was obtained with PEOX compared with the pure drug and solid dispersion with PVP. A big improvement in the intrinsic dissolution rate (45 times) and dissolved amount of GPZ (58 times) was achieved with PEOX in fasted state simulated intestinal fluid, against comparable enhancement observed with PEOX and PVP in phosphate buffer at pH 6.8. Lower molecular weight of PEOX-5K (5000 g/mol) was found to be superior to higher molecular weight PEOX-50K (50,000 g/mol) in the improvement of dissolution behavior. The findings of this study with GPZ as a model drug introduce lower molecular weight PEOX as a promising polymeric carrier toward better oral bioavailability of poorly soluble drugs.
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Affiliation(s)
- Hanan Fael
- Department of Chemistry, Koç University, Istanbul, Turkey.
| | - Clara Ràfols
- Departament de Enginyeria Química i Química Analítica and Institut de Biomedicina (IBUB), Universitat de Barcelona, Martí i Franquès 1-11, E-08028 Barcelona, Spain
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17
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Adatoz EB, Hendessi S, Ow-Yang CW, Demirel AL. Restructuring of poly(2-ethyl-2-oxazoline)/tannic acid multilayers into fibers. SOFT MATTER 2018; 14:3849-3857. [PMID: 29718054 DOI: 10.1039/c8sm00381e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
H-Bonded, pH-responsive poly(2-ethyl-2-oxazoline) (PEOX) and tannic acid (TA) multilayers were prepared by layer-by-layer deposition. Free-floating PEOX/TA multilayers were shown to restructure in a pH3 phosphate buffer solution to H-bonded, pH-responsive PEOX/TA fibers. This restructuring was also evident during the growth of multilayers thicker than 15 bilayers (BL). The growth profile of 30 BL-thick films showed a significant decrease in the film thickness from 118 nm to 85 nm between 15 BL and 20 BL, after which the growth trend was regained with some small fluctuations. This decrease was associated with the detachment of film patches from the top surface of the film. The rinse solutions consisted of fibrous aggregates, which were formed by the restructuring of the detached multilayer patches. These fibers were characterized by TGA, XPS, FTIR and SEM measurements which showed that the fibers consisted of H-bonded PEOX and TA molecules. As such, the fibers were pH-responsive and disintegrated at pH > 8.5. Scanning electron microscopy images indicated that the fibers might have been formed by the curling of planar LbL film patches and the dried fibers looked like collapsed hollow tubes on solid substrates. These results contribute to our understanding of the stability of LbL films in various chemical conditions and the ways to modify the morphology of self-assembled structures. pH-responsive fibrous aggregates are important in a variety of biomedical applications, from controlled release to sensors.
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Affiliation(s)
- E Beruhil Adatoz
- Biomedical Sciences & Engineering Program, Koç University, 34450 Sarıyer, Istanbul, Turkey
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18
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Pooch F, Sliepen M, Svedström KJ, Korpi A, Winnik FM, Tenhu H. Inversion of crystallization rates in miscible block copolymers of poly(lactide)- block-poly(2-isopropyl-2-oxazoline). Polym Chem 2018. [DOI: 10.1039/c8py00198g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
From a miscible melt, crystallization drives phase-separation of PLLA-PiPOx. PLLA plasticizes PiPOx and inverts the crystallization rates compared to the homopolymers.
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Affiliation(s)
- Fabian Pooch
- Department of Chemistry
- University of Helsinki
- Helsinki 00014
- Finland
| | | | | | - Antti Korpi
- Department of Bioproducts and Biosystems
- Aalto University
- Aalto 00076
- Finland
| | - Françoise M. Winnik
- Department of Chemistry
- University of Helsinki
- Helsinki 00014
- Finland
- WPI International Centre for Nanoarchitectonics (MANA)
| | - Heikki Tenhu
- Department of Chemistry
- University of Helsinki
- Helsinki 00014
- Finland
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19
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Glassner M, Vergaelen M, Hoogenboom R. Poly(2-oxazoline)s: A comprehensive overview of polymer structures and their physical properties. POLYM INT 2017. [DOI: 10.1002/pi.5457] [Citation(s) in RCA: 151] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Mathias Glassner
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan Belgium
| | - Maarten Vergaelen
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan Belgium
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20
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Oleszko-Torbus N, Wałach W, Utrata-Wesołek A, Dworak A. Control of the Crystalline Properties of 2-Isopropyl-2-oxazoline Copolymers in Condensed State and in Solution Depending on the Composition. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01639] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Natalia Oleszko-Torbus
- Centre of Polymer and Carbon
Materials, Polish Academy of Sciences, ul. M. Curie - Skłodowskiej
34, 41-819 Zabrze, Poland
| | - Wojciech Wałach
- Centre of Polymer and Carbon
Materials, Polish Academy of Sciences, ul. M. Curie - Skłodowskiej
34, 41-819 Zabrze, Poland
| | - Alicja Utrata-Wesołek
- Centre of Polymer and Carbon
Materials, Polish Academy of Sciences, ul. M. Curie - Skłodowskiej
34, 41-819 Zabrze, Poland
| | - Andrzej Dworak
- Centre of Polymer and Carbon
Materials, Polish Academy of Sciences, ul. M. Curie - Skłodowskiej
34, 41-819 Zabrze, Poland
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21
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Furuncuoğlu Özaltın T, Aviyente V, Atılgan C, Demirel L. Multiscale modeling of poly(2-isopropyl-2-oxazoline) chains in aqueous solution. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.10.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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22
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Zschoche S, Rueda JC, Binner M, Komber H, Janke A, Appelhans D, Voit B. Temperature- and pH-dependent aggregation behavior of hydrophilic dual-sensitive poly(2-oxazoline)s block copolymers as latent amphiphilic macromolecules. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.11.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Korchia L, Bouilhac C, Robin JJ, Lapinte V. Amphiphilic photo-induced triblock polyoxazoline through coumarin dimerization: Efficient synthetic tool for nanoparticles. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.09.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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