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Yu P, Sedlačík T, Parmentier L, Jerca FA, Jerca VV, Van Vlierberghe S, Leiske MN, Hoogenboom R. Degradable Cell-Adhesive Hybrid Hydrogels by Cross-Linking of Gelatin with Poly(2-isopropenyl-2-oxazoline). Biomacromolecules 2024; 25:5332-5342. [PMID: 39059021 DOI: 10.1021/acs.biomac.4c00743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2024]
Abstract
This study focused on the cross-linking of poly(2-isopropenyl-2-oxazoline) (PiPOx) with gelatin to obtain strong, degradable hybrid hydrogels with good cell adhesion. The molecular weight and concentration of PiPOx and the PiPOx-to-gelatin ratio were varied to adjust the mechanical and swelling properties of the hybrid hydrogels. The swelling degree of PiPOx-gelatin hydrogels in water ranged between 1260 and 810%, with the corresponding Young's compressive moduli ranging from 77 to 215 kPa. Rheological measurements demonstrated the mechanical stability of the hydrogels. The hydrogels exhibited substantial degradation in Dulbecco's phosphate-buffered saline (DPBS) and cell culture medium within several weeks, indicating their degradability and responsiveness. The cell adhesion assay with primary human foreskin fibroblasts revealed the hybrid hydrogels are noncytotoxic and support cell attachment and proliferation. These strong hydrogels thus show excellent potential as biomedical cell scaffolds, combining the tunability and strength of PiPOx hydrogels with gelatin's cell-interactive properties while the ester-containing cross-links provide tunable degradability.
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Affiliation(s)
- Peitao Yu
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
| | - Tomáš Sedlačík
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
| | - Laurens Parmentier
- Polymer Chemistry and Biomaterials Group, Centre of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
| | - Florica Adriana Jerca
- Smart Organic Materials Group, "Costin D. Nenitzescu" Institute of Organic and Supramolecular Chemistry, Romanian Academy, 202B Splaiul Independentei, 060023 Bucharest, Romania
| | - Valentin Victor Jerca
- Smart Organic Materials Group, "Costin D. Nenitzescu" Institute of Organic and Supramolecular Chemistry, Romanian Academy, 202B Splaiul Independentei, 060023 Bucharest, Romania
| | - Sandra Van Vlierberghe
- Polymer Chemistry and Biomaterials Group, Centre of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
| | - Meike N Leiske
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
- Macromolecular Chemistry, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany
- Bavarian Polymer Institute, Universitätsstraße 30, 95447 Bayreuth, Germany
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
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2
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Jerca FA, Muntean C, Remaut K, Jerca VV, Raemdonck K, Hoogenboom R. Cationic amino-acid functionalized polymethacrylamide vectors for siRNA transfection based on modification of poly(2-isopropenyl-2-oxazoline). J Control Release 2023; 364:687-699. [PMID: 37935258 DOI: 10.1016/j.jconrel.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/01/2023] [Accepted: 11/02/2023] [Indexed: 11/09/2023]
Abstract
Poly(2-isopropenyl-2-oxazoline) (PiPOx) is a functional polymer showing great potential for the development of smart biomaterials. The straightforward synthesis and post-polymerization functionalization of PiPOx offers many opportunities for tailoring the properties of the polymer towards biomaterials. In this study we report for the first time PiPOx-based cationic charged polymethacrylamides with amino acid side chains that can complex siRNA and promote transfection in vitro. Therefore, PiPOx was fully modified via ring opening addition reactions with the carboxylic acid groups of a series of N-Boc-L-amino acids and their reaction kinetics were investigated. Based on the determined kinetic constants, another series of PiPOx-based copolymers with balanced hydrophilic/hydrophobic content of N-Boc-L-amino acids were obtained via one-pot modification reaction with two different N-Boc-L-amino acids. The N-Boc protected homopolymers and related copolymers were deprotected to obtain (co)polymers with the targeted side chain cationic charged units. The (co)polymers' structures were fully investigated via FT-IR and 1H NMR spectroscopy, size exclusion chromatography (SEC), and TGA-DSC-MS analysis. The polarimetry measurements revealed that the homopolymers retain their chiroptical properties after post-modification, and a sign inversion is noticed from (L) N-Boc-protected analogues to (D) for the TFA cationic charged homopolymers. Generally, cationically charged homopolymers with hydrophilic amino acids on the side chain showed efficient complexation of siRNA, but poor transfection while cationic copolymers having both tryptophan and valine or proline side chains revealed moderate siRNA binding, high transfection efficiency (> 90% of the cells) and potent gene silencing with IC50 values down to 5.5 nM. Particularly, these cationic copolymers showed higher gene silencing potency as compared to the commercial JetPRIME® reference, without reducing cell viability in the concentration range used for transfection, making this a very interesting system for in vitro siRNA transfection.
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Affiliation(s)
- Florica Adriana Jerca
- Smart Organic Materials Group, "Costin D. Nenitzescu" Institute of Organic and Supramolecular Chemistry, Romanian Academy, 202B Spl. Independentei CP 35-108, 060023 Bucharest, Romania; Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium.
| | - Cristina Muntean
- Ghent Research Group on Nanomedicines, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Katrien Remaut
- Ghent Research Group on Nanomedicines, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Valentin Victor Jerca
- Smart Organic Materials Group, "Costin D. Nenitzescu" Institute of Organic and Supramolecular Chemistry, Romanian Academy, 202B Spl. Independentei CP 35-108, 060023 Bucharest, Romania; Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000 Ghent, Belgium
| | - Koen Raemdonck
- Ghent Research Group on Nanomedicines, Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, 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.
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3
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Kopka B, Kost B, Pawlak A, Tomaszewska A, Krupa A, Basko M. Covalent segmented polymer networks composed of poly(2-isopropenyl-2-oxazoline) and selected aliphatic polyesters: designing biocompatible amphiphilic materials containing degradable blocks. SOFT MATTER 2023; 19:6987-6999. [PMID: 37667566 DOI: 10.1039/d3sm00948c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
To promote facile and efficient synthesis of segmented covalent networks, we developed a cross-linking process with reactive polymeric components in a system without catalysts or side products. To achieve the direct formation of amphiphilic networks, an addition reaction was performed between the polyesters containing carboxyl terminal groups with pendant groups distributed along poly(2-isopropenyl-2-oxazoline) chains. Covalent cross-linking was achieved from predetermined amounts of components dissolved in DMSO at 140 °C. To tune the properties of the resulting networks, the composition and length of the polyester segments and the degree of cross-linking were changed in the feed. The chemical structure of the networks was characterized using Fourier transform infrared-attenuated total reflection spectroscopy and 13C magic-angle spinning NMR. The swelling ability of the formed networks was investigated in aqueous and organic media. Moreover, mechanical properties were tested during uniaxial compression. The cytocompatibility of the scaffolds was confirmed by MTT assay. Through the results obtained, the first report describing the cross-linking of polyesters on hydrophilic PiPOx was provided to prepare new, biocompatible materials with tuneable properties that are promising for potential biomedical applications.
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Affiliation(s)
- Bartosz Kopka
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Bartłomiej Kost
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Andrzej Pawlak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Agata Tomaszewska
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland
- Bio-Med-Chem Doctoral School, University of Lodz and Lodz Institutes of the Polish Academy of Sciences, Banacha 12/16, 90-237 Lodz, Poland
| | - Agnieszka Krupa
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland
| | - Malgorzata Basko
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
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Singh N, Riaz U. Recent trends on synthetic approaches and application studies of conducting polymers and copolymers: a review. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03987-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Kopka B, Kost B, Basko M. Poly(2-isopropenyl-2-oxazoline) as a reactive polymer for materials development. Polym Chem 2022. [DOI: 10.1039/d2py00660j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Poly(2-isopropenyl-2-oxazoline) has attracted growing interest as a reactive polymer that can be used as a starting material for the construction of more complex structures.
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Affiliation(s)
- Bartosz Kopka
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Bartłomiej Kost
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
| | - Malgorzata Basko
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland
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6
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Jerca FA, Jerca VV, Hoogenboom R. In Vitro Assessment of the Hydrolytic Stability of Poly(2-isopropenyl-2-oxazoline). Biomacromolecules 2021; 22:5020-5032. [PMID: 34753285 DOI: 10.1021/acs.biomac.1c00994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Poly(2-isopropenyl-2-oxazoline) (PiPOx) is emerging as a promising, versatile polymer platform to design functional materials and particularly biomaterials that rely on the hydrophilic character of the 2-oxazoline side units. To be able to assess the applicability of PiPOx in a biomedical context, it is essential to understand its stability and degradation behavior in physiological conditions. In the present work, the hydrolytic stability of PiPOx was systematically investigated as a function of pH during incubation in various buffers. PiPOx was found to be stable in deionized water (pH 6.9), to have good stability in basic conditions (pH 8 and 9), to be satisfactorily stable in neutral conditions (pH 7.4), and to have moderate to low stability in acidic conditions (decreases drastically from pH 6 to pH 1.2). At pH 4, PiPOx formed a crosslinked network in a timeframe of hours, while at pH 1.2, PiPOx was transformed to a water-soluble poly(N-(2-hydroxyethyl)methacrylamide) type of structure over the course of 2 weeks. In vitro stability assays were performed in phosphate-buffered saline (pH 7.4), simulated body fluid (SBF) (pH 7.4), simulated saliva (pH 6.4), simulated intestinal fluid (pH 6.8), and plasma (pH 7.4) revealing that PiPOx is stable in these SBFs up to 1 week of incubation. When incubated in simulated gastric fluid (pH 1.2), PiPOx exhibited a similar degradation behavior to that observed in the buffer at pH 1.2, rendering a water-soluble structure. The presented results on the stability of PiPOx will be important for future use of PiPOx for the development of drug-delivery systems and biomedical applications, such as hydrogels.
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Affiliation(s)
- Florica Adriana Jerca
- Centre of Organic Chemistry "Costin D. Nenitzescu", Romanian Academy, 202B Spl. Independentei CP 35-108, 060023 Bucharest, Romania
| | - Valentin Victor Jerca
- Centre of Organic Chemistry "Costin D. Nenitzescu", Romanian Academy, 202B Spl. Independentei CP 35-108, 060023 Bucharest, Romania
| | - 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
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7
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Kopka B, Kost B, Rajkowska K, Pawlak A, Kunicka-Styczyńska A, Biela T, Basko M. A simple strategy for efficient preparation of networks based on poly(2-isopropenyl-2-oxazoline), poly(ethylene oxide), and selected biologically active compounds: Novel hydrogels with antibacterial properties. SOFT MATTER 2021; 17:10683-10695. [PMID: 34783330 DOI: 10.1039/d1sm01066b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Novel polymer networks composed of biocompatible, hydrophilic poly(2-isopropenyl-2-oxazoline) (PiPOx), poly(ethylene oxide) (PEO), and selected biologically active compounds (cinnamic acid, benzoic acid or eugenol) were developed for potential antimicrobial applications. The applied crosslinking method, based on the addition reaction between oxazoline pendant groups and chosen reagents containing carboxyl functions, is relatively facile, free from by-products, and thus well suited for biomaterial preparation. The one-step synthesis enabled efficient network formation with high gel contents (>90%). The chemical structure of the newly synthesized networks was characterized using Fourier Transform Infrared-attenuated Total Reflection spectroscopy (FTIR-ATR) and 13C Magic-Angle Spinning (MAS) NMR. To evaluate the suitability for biomedical applications, swelling in water and the mechanical properties of the networks were investigated. The antimicrobial efficacy of the prepared hydrogels was tested in neutral medium both by the agar diffusion method and in the liquid culture against Gram-positive and Gram-negative strains: Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae and Enterobacter cloaceae. All the tested hydrogels showed an antimicrobial effect in the direct contact zone. Moreover, the eugenol loaded hydrogel expressed a broader bacteriostatic effect inhibiting microorganism growth beyond the contact zone. These form-stable hydrogels with antibacterial properties may be of interest for designing materials dedicated to biomedical applications.
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Affiliation(s)
- Bartosz Kopka
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Bartłomiej Kost
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Katarzyna Rajkowska
- Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Wólczańska 171/173, 90-924 Lodz, Poland
| | - Andrzej Pawlak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Alina Kunicka-Styczyńska
- Institute of Fermentation Technology and Microbiology, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Wólczańska 171/173, 90-924 Lodz, Poland
| | - Tadeusz Biela
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
| | - Malgorzata Basko
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Lodz, Poland.
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8
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Iordache T, Banu ND, Giol ED, Vuluga DM, Jerca FA, Jerca VV. Factorial design optimization of polystyrene microspheres obtained by aqueous dispersion polymerization in the presence of poly(2‐ethyl‐2‐oxazoline) reactive stabilizer. POLYM INT 2020. [DOI: 10.1002/pi.5974] [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]
Affiliation(s)
- Tanta‐Verona Iordache
- National Research and Development Institute for Chemistry and Petrochemistry ICECHIM Bucharest Romania
| | - Nicoleta D Banu
- Centre of Organic Chemistry ‘Costin D. Nenitzescu’ Romanian Academy Bucharest Romania
| | - Elena D Giol
- Centre of Organic Chemistry ‘Costin D. Nenitzescu’ Romanian Academy Bucharest Romania
- ‘Cantacuzino’ National Medico‐Military Institute for Research and Development Bucharest Romania
| | - Dumitru M Vuluga
- Centre of Organic Chemistry ‘Costin D. Nenitzescu’ Romanian Academy Bucharest Romania
| | - Florica A Jerca
- Centre of Organic Chemistry ‘Costin D. Nenitzescu’ Romanian Academy Bucharest Romania
| | - Valentin V Jerca
- Centre of Organic Chemistry ‘Costin D. Nenitzescu’ Romanian Academy Bucharest Romania
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Cegłowski M, Jerca VV, Jerca FA, Hoogenboom R. Reduction-Responsive Molecularly Imprinted Poly(2-isopropenyl-2-oxazoline) for Controlled Release of Anticancer Agents. Pharmaceutics 2020; 12:E506. [PMID: 32498326 PMCID: PMC7356239 DOI: 10.3390/pharmaceutics12060506] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/29/2020] [Accepted: 05/31/2020] [Indexed: 01/09/2023] Open
Abstract
Trigger-responsive materials are capable of controlled drug release in the presence of a specific trigger. Reduction induced drug release is especially interesting as the reductive stress is higher inside cells than in the bloodstream, providing a conceptual controlled release mechanism after cellular uptake. In this work, we report the synthesis of 5-fluorouracil (5-FU) molecularly imprinted polymers (MIPs) based on poly(2-isopropenyl-2-oxazoline) (PiPOx) using 3,3'-dithiodipropionic acid (DTDPA) as a reduction-responsive functional cross-linker. The disulfide bond of DTDPA can be cleaved by the addition of tris(2-carboxyethyl)phosphine (TCEP), leading to a reduction-induced 5-FU release. Adsorption isotherms and kinetics for 5-FU indicate that the adsorption kinetics process for imprinted and non-imprinted adsorbents follows two different kinetic models, thus suggesting that different mechanisms are responsible for adsorption. The release kinetics revealed that the addition of TCEP significantly influenced the release of 5-FU from PiPOx-MIP, whereas for non-imprinted PiPOx, no statistically relevant differences were observed. This work provides a conceptual basis for reduction-induced 5-FU release from molecularly imprinted PiPOx, which in future work may be further developed into MIP nanoparticles for the controlled release of therapeutic agents.
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Affiliation(s)
- Michał Cegłowski
- Supramolecular Chemistry Group, Center of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium; (V.V.J.); (F.A.J.)
- Faculty of Chemistry, Adam Mickiewicz University in Poznan, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Valentin Victor Jerca
- Supramolecular Chemistry Group, Center of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium; (V.V.J.); (F.A.J.)
- Centre of Organic Chemistry “Costin D. Nenitzescu”, Romanian Academy, Spl. Independentei 202B, 060023 Bucharest, Romania
| | - Florica Adriana Jerca
- Supramolecular Chemistry Group, Center of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium; (V.V.J.); (F.A.J.)
- Centre of Organic Chemistry “Costin D. Nenitzescu”, Romanian Academy, Spl. Independentei 202B, 060023 Bucharest, Romania
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Center of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium; (V.V.J.); (F.A.J.)
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Raus V, Hološ A, Kronek J, Mosnáček J. Well-Defined Linear and Grafted Poly(2-isopropenyl-2-oxazoline)s Prepared via Copper-Mediated Reversible-Deactivation Radical Polymerization Methods. Macromolecules 2020. [DOI: 10.1021/acs.macromol.9b02662] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Vladimír Raus
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Ana Hološ
- Polymer Institute of the Slovak Academy of Sciences, Dubravska cesta 9, 845 41 Bratislava, Slovakia
| | - Juraj Kronek
- Polymer Institute of the Slovak Academy of Sciences, Dubravska cesta 9, 845 41 Bratislava, Slovakia
| | - Jaroslav Mosnáček
- Polymer Institute of the Slovak Academy of Sciences, Dubravska cesta 9, 845 41 Bratislava, Slovakia
- Centre for Advanced Materials Application of the Slovak Academy of Sciences, Dubravska cesta 9, 845 11 Bratislava, Slovakia
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Koolivand A, Shahrokhi M, Farahzadi H. Optimal control of molecular weight and particle size distributions in a batch suspension polymerization reactor. IRANIAN POLYMER JOURNAL 2019. [DOI: 10.1007/s13726-019-00737-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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12
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Mastnak T, Lobnik A, Mohr GJ, Finšgar M. Indicator Layers Based on Ethylene-Vinyl Acetate Copolymer (EVA) and Dicyanovinyl Azobenzene Dyes for Fast and Selective Evaluation of Vaporous Biogenic Amines. SENSORS (BASEL, SWITZERLAND) 2018; 18:E4361. [PMID: 30544695 PMCID: PMC6308792 DOI: 10.3390/s18124361] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 12/04/2018] [Accepted: 12/06/2018] [Indexed: 12/26/2022]
Abstract
The article presents naked-eye methods for fast, sensitive, and selective detection of isopentylamine and cadaverine vapours based on 4-N,N-dioctylamino-4'-dicyanovinylazobenzene (CR-528) and 4-N,N-dioctylamino-2'-nitro-4'-dicyanovinylazobenzene (CR-555) dyes immobilized in ethylene-vinyl acetate copolymer (EVA). The reaction of CR-528/EVA and CR-555/EVA indicator layers with isopentylamine vapours caused a vivid colour change from pink/purple to yellow/orange-yellow. Additionally, CR-555/EVA showed colour changes upon exposure to cadaverine. The colour changes were analysed by ultraviolet⁻visible (UV/VIS) molecular absorption spectroscopy for amine quantification, and the method was partially validated for the detection limit, sensitivity, and linear concentration range. The lowest detection limits were reached with CR-555/EVA indicator layers (0.41 ppm for isopentylamine and 1.80 ppm for cadaverine). The indicator layers based on EVA and dicyanovinyl azobenzene dyes complement the existing library of colorimetric probes for the detection of biogenic amines and show great potential for food quality control.
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Affiliation(s)
- Tinkara Mastnak
- Institute for Environmental Protection and Sensors, Beloruska 7, SI-2000 Maribor, Slovenia.
- Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia.
| | - Aleksandra Lobnik
- Institute for Environmental Protection and Sensors, Beloruska 7, SI-2000 Maribor, Slovenia.
- Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia.
| | - Gerhard J Mohr
- Joanneum Research Forschungsgesellschaft mbH-Materials, Franz-Pichler-Straße 30, A-8160 Weiz, Austria.
| | - Matjaž Finšgar
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia.
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Jerca FA, Jerca VV, Hoogenboom R. Well‐Defined Thermoresponsive Polymethacrylamide Copolymers with Ester Pendent Groups through One‐Pot Statistical Postpolymerization Modification of Poly(2‐Isopropenyl‐2‐Oxazoline) with Multiple Carboxylic Acids. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29188] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Florica Adriana Jerca
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular ChemistryGhent University Krijgslaan 281‐S4, B‐9000 Ghent Belgium
- Centre of Organic Chemistry “Costin D. Nenitescu”Romanian Academy 202B Spl. Independentei CP 35‐108, 060023 Bucharest Romania
| | - Valentin Victor Jerca
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular ChemistryGhent University Krijgslaan 281‐S4, B‐9000 Ghent Belgium
- Centre of Organic Chemistry “Costin D. Nenitescu”Romanian Academy 202B Spl. Independentei CP 35‐108, 060023 Bucharest Romania
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular ChemistryGhent University Krijgslaan 281‐S4, B‐9000 Ghent Belgium
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14
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Jerca FA, Jerca VV, Anghelache AM, Vuluga DM, Hoogenboom R. Poly(2-isopropenyl-2-oxazoline) as a versatile platform towards thermoresponsive copolymers. Polym Chem 2018. [DOI: 10.1039/c8py00612a] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Thermoresponsive (co)polymers with LCST behavior based on a well-defined PiPOx scaffold showing high versatility in tuning up the TCP as well as the interval of response.
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Affiliation(s)
- Florica Adriana Jerca
- Supramolecular Chemistry Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
| | - Valentin Victor Jerca
- Supramolecular Chemistry Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
| | - Alina Maria Anghelache
- Centre of Organic Chemistry “Costin D. Nenitescu”
- Romanian Academy
- 060023 Bucharest
- Romania
- Department of Bioresources and Polymer Science
| | - Dumitru Mircea Vuluga
- Centre of Organic Chemistry “Costin D. Nenitescu”
- Romanian Academy
- 060023 Bucharest
- Romania
| | - Richard Hoogenboom
- Supramolecular Chemistry Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
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15
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Rezaeian K, Khanmohammadi H, Shabani N. Sequential Detection of CN- and HSO4- Anions in an Aqueous Environment Utilizing a New Colorimetric Azoimine Receptor: Mimicking Logic Gate Behaviour and a Security Keypad Lock. Aust J Chem 2018. [DOI: 10.1071/ch18048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new isonicotiamide-based azoimine receptor has been successfully devised and synthesised for dual-recognition of CN− and HSO4− anions in aqueous media (3 : 2 DMSO–water solution). The devised azomethine probe detected lethal cyanide ions under UV-vis spectroscopy through the rapid appearance of an orange colour. More importantly, the colour and spectroscopic changes of the devised chemosensor could be revived upon the addition of HSO4− to the sensor containing cyanide ions. Furthermore, other surveyed anions failed to induce a similar response. Interestingly, based on changes in absorption intensity at a particular wavelength in the presence of two aforementioned anions, as two chemical inputs, an INHIBIT logic gate has been elaborated. Moreover, the reversibility of the sensory system provided an opportunity to present a sequential logic circuit at a molecular level. In accession, the target chemosensor could operate as a molecular keypad lock with sequential chemical inputs of CN− and HSO4− anions.
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17
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Lück S, Schubel R, Rüb J, Hahn D, Mathieu E, Zimmermann H, Scharnweber D, Werner C, Pautot S, Jordan R. Tailored and biodegradable poly(2-oxazoline) microbeads as 3D matrices for stem cell culture in regenerative therapies. Biomaterials 2015; 79:1-14. [PMID: 26686977 DOI: 10.1016/j.biomaterials.2015.11.045] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 11/09/2015] [Accepted: 11/29/2015] [Indexed: 12/11/2022]
Abstract
We present the synthesis of hydrogel microbeads based on telechelic poly(2-oxazoline) (POx) crosslinkers and the methacrylate monomers (HEMA, METAC, SPMA) by inverse emulsion polymerization. While in batch experiments only irregular and ill-defined beads were obtained, the preparation in a microfluidic (MF) device resulted in highly defined hydrogel microbeads. Variation of the MF parameters allowed to control the microbead diameter from 50 to 500 μm. Microbead elasticity could be tuned from 2 to 20 kPa by the POx:monomer composition, the POx chain length, net charge of the hydrogel introduced via the monomer as well as by the organic content of the aqueous phase. The proliferations of human mesenchymal stem cells (hMSCs) on the microbeads were studied. While neutral, hydrophilic POx-PHEMA beads were bioinert, excessive colonization of hMSCs on charged POx-PMETAC and POx-PSPMA was observed. The number of proliferated cells scaled roughly linear with the METAC or SPMA comonomer content. Additional collagen I coating further improved the stem cell proliferation. Finally, a first POx-based system for the preparation of biodegradable hydrogel microcarriers is described and evaluated for stem cell culturing.
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Affiliation(s)
- Steffen Lück
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Mommsenstr. 4, 01069, Dresden, Germany; Center for Regenerative Therapies Dresden (CRTD), Fetcherstr. 105, 01307, Dresden, Germany; Dresden Initiative for Bioactive Interfaces & Materials, Technische Universität Dresden, Mommsenstr. 4, 01069, Dresden, Germany
| | - René Schubel
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Mommsenstr. 4, 01069, Dresden, Germany
| | - Jannick Rüb
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Mommsenstr. 4, 01069, Dresden, Germany; Dresden Initiative for Bioactive Interfaces & Materials, Technische Universität Dresden, Mommsenstr. 4, 01069, Dresden, Germany
| | - Dominik Hahn
- Dresden Initiative for Bioactive Interfaces & Materials, Technische Universität Dresden, Mommsenstr. 4, 01069, Dresden, Germany; Max-Bergmann Center of Biomaterials Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Evelien Mathieu
- Center for Regenerative Therapies Dresden (CRTD), Fetcherstr. 105, 01307, Dresden, Germany
| | - Heike Zimmermann
- Max-Bergmann Center of Biomaterials Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Dieter Scharnweber
- Max-Bergmann Center of Biomaterials Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Carsten Werner
- Dresden Initiative for Bioactive Interfaces & Materials, Technische Universität Dresden, Mommsenstr. 4, 01069, Dresden, Germany; Max-Bergmann Center of Biomaterials Dresden, Budapester Str. 27, 01069, Dresden, Germany
| | - Sophie Pautot
- Center for Regenerative Therapies Dresden (CRTD), Fetcherstr. 105, 01307, Dresden, Germany.
| | - Rainer Jordan
- Professur für Makromolekulare Chemie, Department Chemie, Technische Universität Dresden, Mommsenstr. 4, 01069, Dresden, Germany; Center for Regenerative Therapies Dresden (CRTD), Fetcherstr. 105, 01307, Dresden, Germany; Dresden Initiative for Bioactive Interfaces & Materials, Technische Universität Dresden, Mommsenstr. 4, 01069, Dresden, Germany.
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18
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Hirayama M, Kobayashi Y, Tanaka Y, Sato T, Harada T, Tajima N, Kuroda R, Fujiki M, Imai Y. Chiral Optical Properties of Phenyloxazoline Derivatives that Appear Only in the Solid State. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Spiridon MC, Jerca FA, Jerca VV, Vasilescu DS, Vuluga DM. 2-Oxazoline based photo-responsive azo-polymers. Synthesis, characterization and isomerization kinetics. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2012.11.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Weber C, Neuwirth T, Kempe K, Ozkahraman B, Tamahkar E, Mert H, Becer CR, Schubert US. 2-Isopropenyl-2-oxazoline: A Versatile Monomer for Functionalization of Polymers Obtained via RAFT. Macromolecules 2011. [DOI: 10.1021/ma2021387] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Christine Weber
- Laboratory
of Organic and Macromolecular
Chemistry (IOMC), Friedrich-Schiller-University Jena, Humboldtstrasse 10, 07743, Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich-Schiller-University Jena, Humboldtstrasse 10, 07743, Jena, Germany
- Dutch Polymer Institute (DPI), John F. Kennedylaan 2, 5612 AB Eindhoven, The
Netherlands
| | - Toni Neuwirth
- Laboratory
of Organic and Macromolecular
Chemistry (IOMC), Friedrich-Schiller-University Jena, Humboldtstrasse 10, 07743, Jena, Germany
| | - Kristian Kempe
- Laboratory
of Organic and Macromolecular
Chemistry (IOMC), Friedrich-Schiller-University Jena, Humboldtstrasse 10, 07743, Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich-Schiller-University Jena, Humboldtstrasse 10, 07743, Jena, Germany
| | - Bengi Ozkahraman
- Department
of Chemical Engineering, Hitit University, 19030, Corum, Turkey
| | - Emel Tamahkar
- Department
of Chemical Engineering, Hitit University, 19030, Corum, Turkey
| | - Humeyra Mert
- Department
of Chemical Engineering, Hitit University, 19030, Corum, Turkey
| | - C. Remzi Becer
- Laboratory
of Organic and Macromolecular
Chemistry (IOMC), Friedrich-Schiller-University Jena, Humboldtstrasse 10, 07743, Jena, Germany
- Dutch Polymer Institute (DPI), John F. Kennedylaan 2, 5612 AB Eindhoven, The
Netherlands
- Department of Chemistry, University of Warwick, CV4 7AL, Coventry, U.K
| | - Ulrich S. Schubert
- Laboratory
of Organic and Macromolecular
Chemistry (IOMC), Friedrich-Schiller-University Jena, Humboldtstrasse 10, 07743, Jena, Germany
- Jena Center for Soft Matter
(JCSM), Friedrich-Schiller-University Jena, Humboldtstrasse 10, 07743, Jena, Germany
- Dutch Polymer Institute (DPI), John F. Kennedylaan 2, 5612 AB Eindhoven, The
Netherlands
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