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Chiriac AP, Ghilan A, Croitoriu A, Serban A, Bercea M, Stoleru E, Nita LE, Doroftei F, Stoica I, Bargan A, Rusu AG, Chiriac VM. Study on cellulose nanofibrils/copolymacrolactone based nano-composites with hydrophobic behaviour, self-healing ability and antioxidant activity. Int J Biol Macromol 2024; 262:130034. [PMID: 38340942 DOI: 10.1016/j.ijbiomac.2024.130034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 01/29/2024] [Accepted: 02/05/2024] [Indexed: 02/12/2024]
Abstract
The multiple uses of cellulose nanofibrils (CNFs) originate from their availability from renewable resources, and are due to their physico-chemical properties, biodegradability and biocompatibility. At the same time, reducing sensitivity to humidity, increasing interfacial adhesion and hydrophobic modification of the CNF surface to diversify applications and improve operation, are current targets pursued. This study focuses on the preparation of a novel gel structure using cellulose nanofibrils (CNFs) and poly(ethylene brassylate-co-squaric acid) (PEBSA50/50), a bio-based copolymacrolactone. The primary goal is to achieve the gel with reduced sensitivity to humidity and enhanced hydrophobic behaviour. The new system was characterized in comparison to its constituent components using various techniques, such as Fourier transform infrared spectroscopy, thermal analysis, X-ray diffraction, and NIR - chemical imaging. Rheological tests demonstrated the formation of the CNF_PEBSA50/50 gel as a result of physical interactions between the two polymeric partners and revealed self-healing abilities for the prepared gels. Determination of the contact angle, surface free energy, as well as dynamic measurements of the vapour sorption of the CNF_PEBSA50/50 system, confirmed the achievement of the study's aim. Furthermore, the CNF_PEBSA50/50 network was utilized to encapsulate citric acid, resulting in the creation of a new bioactive composite with both antioxidant and antimicrobial activity.
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Affiliation(s)
- Aurica P Chiriac
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania.
| | - Alina Ghilan
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alexandra Croitoriu
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alexandru Serban
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Maria Bercea
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Elena Stoleru
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Loredana Elena Nita
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Florica Doroftei
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Iuliana Stoica
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alexandra Bargan
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alina Gabriela Rusu
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Vlad Mihai Chiriac
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
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Morariu S, Avadanei M, Nita LE. Effect of pH on the Poly(acrylic acid)/Poly(vinyl alcohol)/Lysozyme Complexes Formation. Molecules 2023; 29:208. [PMID: 38202791 PMCID: PMC10780248 DOI: 10.3390/molecules29010208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 12/20/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
The interactions between poly(acrylic acid) (PAA), poly(vinyl alcohol) (PVA), and lysozyme (Lys) in an aqueous environment at pHs of 2, 4, and 7.4 were discussed considering the experimental data obtained by turbidimetry, electrokinetic and rheological measurements, and FTIR analysis. It was found that the increase in PAA amount reduces the coacervation zone by shifting the critical pHcr1to higher values while the critical pHcr2 remains unchanged. The coacervation zone extended from 3.1-4.2 to 2.9-4.7 increasing the Lys concentration from 0.2% to 0.5%. The zeta potential measurements showed that the PAA-PVA-Lys mixture in water is the most stable in the pH range of 4.5-8. Zero shear viscosity exhibited deviations from additivity at both investigated pHs, and a maximum value corresponding to a maximum hydrodynamic volume was revealed at PAA weight fractions of 0.4 and 0.5 for pHs of 4 and 7.4, respectively. The binding affinity to Lys of PAA, established by molecular dynamics simulation, was slightly higher than that of PVA. The more stable complex was PAA-Lys formed in a very acidic environment; for that, a binding affinity of -7.1 kcal/mol was determined.
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Affiliation(s)
- Simona Morariu
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.A.); (L.E.N.)
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Crețu BEB, Dodi G, Gardikiotis I, Balan V, Nacu I, Stoica I, Stoleru E, Rusu AG, Ghilan A, Nita LE, Chiriac AP. Bioactive Composite Cryogels Based on Poly (Vinyl Alcohol) and a Polymacrolactone as Tissue Engineering Scaffolds: In Vitro and In Vivo Studies. Pharmaceutics 2023; 15:2730. [PMID: 38140071 PMCID: PMC10747042 DOI: 10.3390/pharmaceutics15122730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/17/2023] [Accepted: 11/30/2023] [Indexed: 12/24/2023] Open
Abstract
In light of the increasing resistance of pathogenic microorganisms to the action of antibiotics, essential oils extracted from plants with therapeutic activity provide a significant alternative to obtaining dressings for the treatment of skin wounds. The encapsulation of essential oils in an amphiphilic gel network allows better dispersion and preservation of hydrophobic bioactive substances while promoting their prolonged release. In this study, we focused on the development of a poly (vinyl alcohol) (PVA)/poly (ethylene brassylate-co-squaric acid) (PEBSA) platform embedded with thymol (Thy), and α-tocopherol (α-Tcp) as a co-drug structure with prospective use for the treatment and healing of skin wounds. The new complex bioactive system was prepared through repeated freeze-thaw processes. The influence of the composition on surface topography, hydrophilic/hydrophobic character, and in vitro interaction with simulated body fluids was evidenced. BALB/3T3 fibroblast cell culture demonstrated the cryogel scaffolds' cytocompatibility. Tests on Wistar rats confirmed their biocompatibility, integration with host tissue, and the absence of inflammatory processes. The bioactive compound significantly enhanced the healing process of full-thickness excision wounds in a rat model. Further investigations on in vivo infection models would assess the potential of the PVA/PEBSA platform with dual bioactive activity for clinical antimicrobial and wound healing therapy.
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Affiliation(s)
- Bianca-Elena-Beatrice Crețu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (B.-E.-B.C.); (I.N.); (A.G.R.); (A.G.); (A.P.C.)
| | - Gianina Dodi
- Biomedical Sciences Department, Faculty of Medical Bioengineering, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania; (G.D.); (V.B.)
| | - Ioannis Gardikiotis
- Advanced Research and Development Center for Experimental Medicine, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania;
| | - Vera Balan
- Biomedical Sciences Department, Faculty of Medical Bioengineering, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania; (G.D.); (V.B.)
| | - Isabella Nacu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (B.-E.-B.C.); (I.N.); (A.G.R.); (A.G.); (A.P.C.)
- Biomedical Sciences Department, Faculty of Medical Bioengineering, Grigore T. Popa University of Medicine and Pharmacy of Iasi, 9-13 Kogalniceanu Street, 700454 Iasi, Romania; (G.D.); (V.B.)
| | - Iuliana Stoica
- Department of Physical Chemistry of Polymers, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.S.); (E.S.)
| | - Elena Stoleru
- Department of Physical Chemistry of Polymers, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.S.); (E.S.)
| | - Alina Gabriela Rusu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (B.-E.-B.C.); (I.N.); (A.G.R.); (A.G.); (A.P.C.)
| | - Alina Ghilan
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (B.-E.-B.C.); (I.N.); (A.G.R.); (A.G.); (A.P.C.)
| | - Loredana Elena Nita
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (B.-E.-B.C.); (I.N.); (A.G.R.); (A.G.); (A.P.C.)
| | - Aurica P. Chiriac
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (B.-E.-B.C.); (I.N.); (A.G.R.); (A.G.); (A.P.C.)
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Plugariu IA, Gradinaru LM, Avadanei M, Rosca I, Nita LE, Maxim C, Bercea M. Thermosensitive Polyurethane-Based Hydrogels as Potential Vehicles for Meloxicam Delivery. Pharmaceuticals (Basel) 2023; 16:1510. [PMID: 38004376 PMCID: PMC10674489 DOI: 10.3390/ph16111510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/16/2023] [Accepted: 10/19/2023] [Indexed: 11/26/2023] Open
Abstract
Meloxicam (MX) is a nonsteroidal anti-inflammatory drug (NSAID) used mainly to reduce pain, inflammation, and fever. In the present study, thermosensitive polyurethane (PU)-based hydrogels with various excipients (PEG, PVP, HPC, and essential oil) were prepared and loaded with MX. Rheological investigations were carried out on the PU-based formulations in various shear regimes, and their viscoelastic characteristics were determined. The average size of the PU micelles was 35.8 nm at 37 °C and slightly increased at 37 nm in the presence of MX. The zeta potential values of the hydrogels were between -10 mV and -11.5 mV. At pH = 6 and temperature of 37 °C, the formulated PU-based hydrogels loaded with MX could deliver significant amounts of the active substance, between 60% and 80% over 24-48 h and more than 90% within 2 weeks. It was found that anomalous transport phenomena dominated MX's release mechanism from the PU-based networks. The results are encouraging for further studies aiming to design alternative carriers to commercial dosage forms of nonsteroidal anti-inflammatory drugs.
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Affiliation(s)
- Ioana-Alexandra Plugariu
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.A.); (I.R.); (L.E.N.)
| | - Luiza Madalina Gradinaru
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.A.); (I.R.); (L.E.N.)
| | - Mihaela Avadanei
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.A.); (I.R.); (L.E.N.)
| | - Irina Rosca
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.A.); (I.R.); (L.E.N.)
| | - Loredana Elena Nita
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.A.); (I.R.); (L.E.N.)
| | - Claudia Maxim
- Faculty of Chemical Engineering and Environmental Protection “Cristofor Simionescu”, “Gheorghe Asachi” Technical University of Iasi, 73A, D. Mangeron Blvd., 700050 Iasi, Romania;
| | - Maria Bercea
- “Petru Poni” Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (I.-A.P.); (M.A.); (I.R.); (L.E.N.)
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Nita LE, Croitoriu A, Serban AM, Bercea M, Rusu AG, Ghilan A, Butnaru M, Mititelu-Tartau L, Chiriac AP. New Hydrogels Based on Agarose/Phytagel and Peptides. Macromol Biosci 2023; 23:e2200451. [PMID: 36565479 DOI: 10.1002/mabi.202200451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/19/2022] [Indexed: 12/25/2022]
Abstract
Short aromatic peptide derivatives, i.e., peptides or amino acids modified with aromatic groups, such as 9-fluorenylmethoxycarbonyl (Fmoc), can self-assemble into extracellular matrix-like hydrogels due to their nanofibrillar architecture. Among different types of amino acids, lysine (Lys) and glycine (Gly) are involved in multiple physiological processes, being key factors in the proper growth of cells, carnitine production, and collagen formation. The authors have previously successfully presented the possibility of obtaining supramolecular gels based on Fmoc-Lys-Fmoc and short peptides such as Fmoc-Gly-Gly-Gly in order to use them as a substrate for cell cultures. This paper investigates how the introduction of a gelling polymer can influence the properties of the network as well as the compatibility of the resulting materials with different cell types. A series of hydrogel compositions consisting of combinations of Fmoc-Lys-Fmoc and Fmoc-Gly-Gly-Gly with Agarose and Phytagel are thus obtained. All compositions form structured gels as shown by rheological studies and scanning electron microscopy. Fourier transform infrared spectroscopy analysis evidences the formation of H-bonds between the polysaccharides and amino acids or short peptides. Moreover, all gels exhibit good cell viability on fibroblasts as demonstrated by a live-dead staining test and good in vivo biocompatibility, which highlights the great potential of these biomaterials for biomedical applications.
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Affiliation(s)
- Loredana Elena Nita
- ″Petru Poni″ Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi, 700487, Romania
| | - Alexandra Croitoriu
- ″Petru Poni″ Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi, 700487, Romania
| | - Alexandru M Serban
- ″Petru Poni″ Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi, 700487, Romania
| | - Maria Bercea
- ″Petru Poni″ Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi, 700487, Romania
| | - Alina G Rusu
- ″Petru Poni″ Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi, 700487, Romania
| | - Alina Ghilan
- ″Petru Poni″ Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi, 700487, Romania
| | - Maria Butnaru
- ″Grigore T. Popa″ University of Medicine and Pharmacy, Strada Universităţii 16, Iasi, 700115, Romania
| | - Liliana Mititelu-Tartau
- ″Grigore T. Popa″ University of Medicine and Pharmacy, Strada Universităţii 16, Iasi, 700115, Romania
| | - Aurica P Chiriac
- ″Petru Poni″ Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi, 700487, Romania
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Crețu BEB, Rusu AG, Ghilan A, Rosca I, Nita LE, Chiriac AP. Cryogel System Based on Poly(vinyl Alcohol)/Poly(ethylene Brassylate-co-Squaric Acid) Platform with Dual Bioactive Activity. Gels 2023; 9:gels9030174. [PMID: 36975622 PMCID: PMC10048711 DOI: 10.3390/gels9030174] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
The inability to meet and ensure as many requirements as possible is fully justified by the continuous interest in obtaining new multifunctional materials. A new cryogel system based on poly(vinyl alcohol) (PVA) and poly(ethylene brassylate-co-squaric acid) (PEBSA) obtained by repeated freeze–thaw processes was previously reported and used for the incorporation of an antibacterial essential oil—namely, thymol (Thy). Furthermore, the present study aims to confer antioxidant properties to the PVA/PEBSA_Thy system by encapsulating α-tocopherol (α-Tcp), targeting a double therapeutic effect due to the presence of both bioactive compounds. The amphiphilic nature of the PEBSA copolymer allowed for the encapsulation of both Thy and α-Tcp, via an in situ entrapment method. The new PVA/PEBSA_Thy_α-Tcp systems were characterized in terms of their influence on the composition, network morphology and release profiles, as well as their antimicrobial and antioxidant properties. The study underlined the cumulative antioxidant efficiency of Thy and α-Tcp, which in combination with the PEBSA copolymer have a synergistic effect (97.1%). We believe that the convenient and simple strategy offered in this study increases applicability for these new PVA/PEBSA_Thy_α-Tcp cryogel systems.
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Affiliation(s)
- Bianca-Elena-Beatrice Crețu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alina Gabriela Rusu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alina Ghilan
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
- Correspondence: (A.G.); (A.P.C.)
| | - Irina Rosca
- Center of Advanced Research in Bionanoconjugates and Biopolymers, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Loredana Elena Nita
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Aurica P. Chiriac
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
- Correspondence: (A.G.); (A.P.C.)
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Nita LE, Crețu BEB, Șerban AM, Rusu AG, Rosca I, Pamfil D, Chiriac AP. New cryogels based on poly (vinyl alcohol) and a copolymacrolactone system. II. Antibacterial properties of the network embedded with thymol bioactive agent. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ghilan A, Nita LE, Pamfil D, Simionescu N, Tudorachi N, Rusu D, Rusu AG, Bercea M, Rosca I, Ciolacu DE, Chiriac AP. One-Step Preparation of Carboxymethyl Cellulose—Phytic Acid Hydrogels with Potential for Biomedical Applications. Gels 2022; 8:gels8100647. [PMID: 36286150 PMCID: PMC9601477 DOI: 10.3390/gels8100647] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 09/29/2022] [Accepted: 10/09/2022] [Indexed: 11/19/2022] Open
Abstract
Hydrogels based on natural, biodegradable materials have gained considerable interest in the medical field due to their improved drug delivery profiles and tissue-mimicking architecture. In this regard, this study was devoted to the preparation and characterization of new physically crosslinked hydrogels based on carboxymethyl cellulose and an unconventional crosslinking agent, phytic acid. Phytic acid, in addition to its antioxidant and antibacterial effects, can improve the biological properties and stability of gels, without adding toxicity. Fourier transform infrared (FTIR) spectroscopy, rheological studies and thermal analysis confirmed the hydrogel formation. The influence of the ratio between the cellulose derivative and the crosslinker upon the morphological structure and water uptake was evidenced by scanning electron microscopy (SEM) and swelling measurements in simulated body fluids. Furthermore, procaine was entrapped within the hydrogels and used as a model drug for in vitro studies, which highlighted the dependence of the drug release on the phytic acid content of the matrix. The materials demonstrated antibacterial effects against Escherichia coli and Staphylococcus aureus bacteria. The biocompatibility was assessed on fibroblast cells, and according to our results, hydrogels can improve cell viability highlighting the potential of these systems as therapeutic scaffolds for skin tissue engineering.
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Affiliation(s)
- Alina Ghilan
- Department of Natural Polymers, Bioactive and Biocompatible Materials, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Loredana Elena Nita
- Department of Natural Polymers, Bioactive and Biocompatible Materials, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Daniela Pamfil
- Department of Polymer Physical Chemistry, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Natalia Simionescu
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Nita Tudorachi
- Department of Natural Polymers, Bioactive and Biocompatible Materials, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Daniela Rusu
- Department of Physics of Polymers and Polymeric Materials, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Alina Gabriela Rusu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Maria Bercea
- Department of Natural Polymers, Bioactive and Biocompatible Materials, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Irina Rosca
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
| | - Diana Elena Ciolacu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
- Correspondence:
| | - Aurica P. Chiriac
- Department of Natural Polymers, Bioactive and Biocompatible Materials, “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania
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Crețu BEB, Nita LE, Șerban AM, Rusu AG, Doroftei F, Chiriac AP. New Cryogels Based on Poly(vinyl alcohol) and a Copolymacrolactone System: I-Synthesis and Characterization. Nanomaterials 2022; 12:nano12142420. [PMID: 35889641 PMCID: PMC9317470 DOI: 10.3390/nano12142420] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/13/2022] [Accepted: 07/13/2022] [Indexed: 12/10/2022]
Abstract
Physical cryogels were obtained using the successive freeze–thaw technique of poly(vinyl alcohol) (PVA)/poly(ethylene brassylate-co-squaric acid) (PEBSA) solutions. The cryogel systems were prepared by using two different molecular weights of PVA and PEBSA with three different ratios between the ethylene brassylate (EB) and squaric acid (SA) comonomers. The presence of interactions, the thermal properties and the morphology were investigated using Fourier Transform Infrared Spectroscopy (FT-IR), thermogravimetry (TGA and DTG) and scanning electron microscopy (SEM), respectively. The influence of the composition on the degree of swelling in a physiological environment was demonstrated. The study highlighted improvements in terms of new network flexibility due to the intermolecular chains interactions brought by the introduction of PEBSA in the cryogel structure. We also concluded that the presence of PEBSA in the PVA/PEBSA cryogel network improved the loading capacity of the new system with specific hydrophobic agents, for example essential oils, which (due to their antimicrobial character) can lead to the use of new systems obtained for various applications.
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Rusu AG, Chiriac AP, Nita LE, Ghilan A, Rusu D, Simionescu N, Tartau LM. Nanostructured hyaluronic acid-based hydrogels encapsulating synthetic/ natural hybrid nanogels as promising wound dressings. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108341] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Mocanu CS, Petre BA, Ion LD, Drochioiu G, Niculaua M, Stoica I, Homocianu M, Nita LE, Gradinaru VR. Structural Characterization of a New Collagen Biomimetic Octapeptide with Nanoscale Self‐assembly Potential: Experimental and Theoretical Approaches. Chempluschem 2021; 87:e202100462. [DOI: 10.1002/cplu.202100462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 12/15/2021] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | - Gabi Drochioiu
- Alexandru Ioan Cuza University of Iasi Chemistry ROMANIA
| | - Marius Niculaua
- Romanian Academy Iasi Branch: Academia Romana Filiala Iasi Research Center for Oenology ROMANIA
| | - Iuliana Stoica
- Romanian Academy Iasi Branch: Academia Romana Filiala Iasi Petru Poni Institute of Macromolecular Chemistry ROMANIA
| | - Mihaela Homocianu
- Romanian Academy Iasi Branch: Academia Romana Filiala Iasi Petru Poni Institute of Macromolecular Chemistry ROMANIA
| | - Loredana Elena Nita
- Romanian Academy Iasi Branch: Academia Romana Filiala Iasi Petru Poni Institute of Macromolecular Chemistry ROMANIA
| | - Vasile Robert Gradinaru
- Alexandru Ioan Cuza University: Universitatea Alexandru Ioan Cuza Chemistry Carol av, No 11 700506 Iasi ROMANIA
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Nita LE, Chiriac AP, Ghilan A, Rusu AG, Pamfil D, Rosca I, Mititelu-Tartau L. Alginate enriched with phytic acid for hydrogels preparation. Therapeutic applications. Int J Biol Macromol 2021; 189:335-345. [PMID: 34425119 DOI: 10.1016/j.ijbiomac.2021.08.122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 08/12/2021] [Accepted: 08/16/2021] [Indexed: 10/20/2022]
Abstract
In the last decade, numerous innovative strategies have been used to obtain highly efficient synthetic or semi-synthetic biomaterials. Between these innovative biomaterials, hydrogels occupy a distinct place due to their superior biological and physico-chemical characteristics. Alginate is a natural linear polysaccharide with important physico-chemical and biological properties. Recently, we obtained a new hydrogel based on alginate and phytic acid with improved physico-chemical properties. In the present study, the hydrogels previously obtained were tested in terms of their biological properties and possibilities of use in the biomedical field. For this purpose, the hydrogels were loaded with norfloxacin (NRF), an antibacterial compound utilised in the treatment against Gram-negative and Gram-positive organisms. Unfortunately, NRF has low solubility and permeability. In order to provide protection against loss, but also for enhanced bioavailability, and controlled-release of norfloxacin, a drug inclusion complex with cyclodextrin was realized. The effect of complexation on the release profile was highlighted. The addition of NRF to the hydrogel matrices greatly improved the antibacterial activity of the tested compounds. The presence of CD did not affect the homogeneity of the drug distribution. Changes in the polymeric matrix structure were registered after the incorporation of the drug, which were attributed to the relaxation of the network subsequently to the penetration and diffusion of the drug solution simultaneously with the swelling process. The release of NRF from Alg_PA polymeric network has been successfully modulated by the use of CD as a host molecule.
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Affiliation(s)
- Loredana Elena Nita
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania.
| | - Aurica P Chiriac
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania
| | - Alina Ghilan
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania
| | - Alina Gabriela Rusu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, "Petru Poni" Institute of Macromolecular Chemistry Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania
| | - Daniela Pamfil
- Department of Physical Chemistry of Polymers, "Petru Poni" Institute of Macromolecular Chemistry Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania
| | - Irina Rosca
- Center of Advanced Research in Bionanoconjugates and Biopolymers, "Petru Poni" Institute of Macromolecular Chemistry Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania
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Bercea M, Gradinaru LM, Barbalata-Mandru M, Vlad S, Nita LE, Plugariu IA, Albulescu R. Shear flow of associative polymers in aqueous solutions. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130441] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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14
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Chiriac AP, Rusu AG, Nita LE, Macsim AM, Tudorachi N, Rosca I, Stoica I, Tampu D, Aflori M, Doroftei F. Synthesis of Poly(Ethylene Brassylate-Co-squaric Acid) as Potential Essential Oil Carrier. Pharmaceutics 2021; 13:477. [PMID: 33916007 PMCID: PMC8067060 DOI: 10.3390/pharmaceutics13040477] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 03/25/2021] [Accepted: 03/25/2021] [Indexed: 11/26/2022] Open
Abstract
Bio-based compounds are a leading direction in the context of the increased demand for these materials due to the numerous advantages associated with their use over conventional materials, which hardly degrade in the environment. At the same time, the use of essential oils and their components is generated mainly by finding alternative solutions to antibiotics and synthetic preservatives due to their bioactive characteristics, but also to their synergistic capacity during the manifestation of different biological properties. The present study is devoted to poly(ethylene brassylate-co-squaric acid) (PEBSA), synthesis and its use for thymol encapsulation and antibacterial system formation. The synthesized copolymer, performed through ethylene brassylate macrolactone ring-opening and copolymerization with squaric acid, was physicochemical characterized. Its amphiphilic character allowed the entrapment of thymol (Ty), a natural monoterpenoid phenol found in oil of thyme, a compound with strong antiseptic properties. The copolymer chemical structure was confirmed by spectroscopic analyses. Thermal analysis evidenced a good thermal stability for the copolymer. Additionally, the antimicrobial activity of PEBSA_Ty complex was investigated against eight different reference strains namely: bacterial strains-Staphylococcus aureus ATCC25923, Escherichia coli ATCC25922, Enterococcus faecalis ATCC 29212, Klebsiella pneumonie ATCC 10031 and Salmonella typhimurium ATCC 14028, yeast strains represented by Candida albicans ATCC10231 and Candida glabrata ATCC 2001, and the fungal strain Aspergillus brasiliensis ATCC9642.
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Affiliation(s)
- Aurica P Chiriac
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alina Gabriela Rusu
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Loredana Elena Nita
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Ana-Maria Macsim
- Department of Polycondensation and Thermostable Polymers, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Nita Tudorachi
- Department of Natural Polymers, Bioactive and Biocompatible Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Irina Rosca
- Center of Advanced Research in Bionanoconjugates and Biopolymers, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Iuliana Stoica
- Department of Physical Chemistry of Polymers, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Daniel Tampu
- Department of Physical Chemistry of Polymers, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Magdalena Aflori
- Department of Physics of Polymers and Polymeric Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Florica Doroftei
- Department of Physics of Polymers and Polymeric Materials, Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
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Nita LE, Chiriac AP, Ghilan A, Rusu AG, Tudorachi N, Timpu D. Alginate enriched with phytic acid for hydrogels preparation. Int J Biol Macromol 2021; 181:561-571. [PMID: 33798571 DOI: 10.1016/j.ijbiomac.2021.03.164] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/08/2021] [Accepted: 03/25/2021] [Indexed: 11/29/2022]
Abstract
Alginate hydrogels are extremely versatile and flexible biomaterials, with an enormous potential for bio-applications use. Their similarity with extracellular matrix is a key factor in their performance for cell and tissue regeneration. In this study superabsorbent high porous hydrogels based on sodium alginate physical crosslinked with a natural crosslinker compound namely phytic acid were prepared and evaluated from the viewpoint of their specific properties. The resulting hydrogels obtained with different ratios between alginate and phytic acid were characterized by Fourier transform infrared spectroscopy technique, scanning electron microscopy, XRD measurements, swelling tests in physiological environment, and thermal analysis by using a simultaneous TG/FT-IR/MS system. There are put into evidence the differences in physico-chemical properties of the hydrogels in relation with their composition, which endows them tunable properties and versatility.
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Affiliation(s)
- Loredana Elena Nita
- "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania.
| | - Aurica P Chiriac
- "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania
| | - Alina Ghilan
- "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania
| | - Alina Gabriela Rusu
- "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania
| | - Nita Tudorachi
- "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania
| | - Daniel Timpu
- "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41-A, RO-700487, Iasi, Romania
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16
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Rusu AG, Chiriac AP, Nita LE, Rosca I, Pinteala M, Mititelu-Tartau L. Chitosan Derivatives in Macromolecular Co-assembly Nanogels with Potential for Biomedical Applications. Biomacromolecules 2020; 21:4231-4243. [PMID: 32909739 DOI: 10.1021/acs.biomac.0c01008] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Maleoyl-chitosan/poly(aspartic acid) nanogels were developed and characterized in order to assess its suitability for biomedical applications. Thus, the physicochemical properties were investigated and correlated with the composition of the new structures. Dynamic light scattering measurements, correlated with transmission electron microscopy images, demonstrated that nanogels size distribution was narrow with average diameter between 186 and 246 nm, and presented positive zeta potential values. The sensitivity of nanogels at pH and temperature was also evaluated. Nanogels loaded with amoxicillin showed a controlled release profile dependent on nanogel content. The formulations loaded with amoxicillin had antibacterial properties, and the cytotoxicity tests indicated good in vivo biocompatibility. In conclusion, the new synthesized polyelectrolyte nanogels, which can provide a stable environment for the encapsulated drugs, can be used as a multifunctional platform for administration of antimicrobial agents from the spectrum of antibiotics that have a very poor biodistribution.
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Affiliation(s)
- Alina Gabriela Rusu
- Laboratory of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Aurica P Chiriac
- Laboratory of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Loredana Elena Nita
- Laboratory of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Irina Rosca
- Center of Advanced Research in Bionanoconjugates and Biopolymers, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Mariana Pinteala
- Center of Advanced Research in Bionanoconjugates and Biopolymers, "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, Iasi 700487, Romania
| | - Liliana Mititelu-Tartau
- "Gr .T. Popa" University of Medicine and Pharmacy, Universitǎţii Street 16, Iasi 700115, Romania
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Nita LE, Chiriac AP, Rusu AG, Ghilan A, Dumitriu RP, Bercea M, Tudorachi N. Stimuli Responsive Scaffolds Based on Carboxymethyl Starch and Poly(2‐Dimethylaminoethyl Methacrylate) for Anti‐Inflammatory Drug Delivery. Macromol Biosci 2020; 20:e1900412. [DOI: 10.1002/mabi.201900412] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/21/2020] [Indexed: 12/28/2022]
Affiliation(s)
- Loredana Elena Nita
- “Petru Poni” Institute of Macromolecular Chemistry 41‐A Grigore Ghica Voda Alley RO‐700487 Iasi Romania
| | - Aurica P. Chiriac
- “Petru Poni” Institute of Macromolecular Chemistry 41‐A Grigore Ghica Voda Alley RO‐700487 Iasi Romania
| | - Alina Gabriela Rusu
- “Petru Poni” Institute of Macromolecular Chemistry 41‐A Grigore Ghica Voda Alley RO‐700487 Iasi Romania
| | - Alina Ghilan
- “Petru Poni” Institute of Macromolecular Chemistry 41‐A Grigore Ghica Voda Alley RO‐700487 Iasi Romania
| | - Raluca P. Dumitriu
- “Petru Poni” Institute of Macromolecular Chemistry 41‐A Grigore Ghica Voda Alley RO‐700487 Iasi Romania
| | - Maria Bercea
- “Petru Poni” Institute of Macromolecular Chemistry 41‐A Grigore Ghica Voda Alley RO‐700487 Iasi Romania
| | - Nita Tudorachi
- “Petru Poni” Institute of Macromolecular Chemistry 41‐A Grigore Ghica Voda Alley RO‐700487 Iasi Romania
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Rusu AG, Chiriac AP, Nita LE, Mititelu‐Tartau L, Tudorachi N, Ghilan A, Rusu D. Multifunctional BSA Scaffolds Prepared with a Novel Combination of UV‐Crosslinking Systems. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900378] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Alina Gabriela Rusu
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iasi Romania
| | - Aurica P. Chiriac
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iasi Romania
| | - Loredana Elena Nita
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iasi Romania
| | - Liliana Mititelu‐Tartau
- Department of Pharmacology and Algesiology“Grigore T. Popa” University of Medicine and Pharmacy Iasi 700115 Romania
| | - Nita Tudorachi
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iasi Romania
| | - Alina Ghilan
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iasi Romania
| | - Daniela Rusu
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iasi Romania
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19
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Nita LE, Chiriac AP, Rusu AG, Bercea M, Ghilan A, Dumitriu RP, Mititelu-Tartau L. New self-healing hydrogels based on reversible physical interactions and their potential applications. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.05.053] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Rusu AG, Chiriac AP, Nita LE, Bercea M, Tudorachi N, Ghilan A, Pamfil D, Rusu D, Cojocaru FD. Interpenetrated polymer network with modified chitosan in composition and self-healing properties. Int J Biol Macromol 2019; 132:374-384. [DOI: 10.1016/j.ijbiomac.2019.03.136] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 03/18/2019] [Accepted: 03/21/2019] [Indexed: 11/26/2022]
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Diaconu A, Nita LE, Chiriac AP, Butnaru M. Investigation of the magnetic field effect upon interpolymeric complexes formation based on bovine serum albumin and poly(aspartic acid). Int J Biol Macromol 2018; 119:974-981. [PMID: 30098364 DOI: 10.1016/j.ijbiomac.2018.08.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 08/06/2018] [Accepted: 08/07/2018] [Indexed: 01/09/2023]
Abstract
The study presents a novel strategy for obtaining highly ordered interpolymeric complexes based on a protein, bovine serum albumin and a synthetic polymer, poly(aspartic acid). In this approach, experimental tests were carried out in the presence of a magnetic field of different intensities, namely 0.11 T and 0.3 T produced by permanent magnets. The influence of the magnetic force on the complexation process and the resulted self-assembled structures were studied by means of FTIR spectroscopy, X-ray diffraction, DLS, SEM microscopy and in vitro assay. The changes in the FTIR spectra acquired after 24 h of exposure were connected with conformational changes in the secondary structure and increased interactions between polymers, particularly when a higher intensity field was used. Due to a large anisotropy of magnetic susceptibility characteristic to both proteins and polypeptides, the magnetic field generated ordered assemblies consisting in globular structures of nanometric dimensions. This assembly strategy using magnets, along with remote manipulation capability can provide a versatile, contact-free, and inexpensive tool to create new, complex materials with tailorable characteristics.
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Affiliation(s)
- A Diaconu
- "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, RO-700487 Iasi, Romania
| | - L E Nita
- "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, RO-700487 Iasi, Romania
| | - A P Chiriac
- "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, RO-700487 Iasi, Romania.
| | - M Butnaru
- "Petru Poni" Institute of Macromolecular Chemistry, 41-A Grigore Ghica Voda Alley, RO-700487 Iasi, Romania
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22
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Abstract
Nanogels in biomedical field are promising and innovative materials as dispersions of hydrogel nanoparticles based on crosslinked polymeric networks that have been called as next generation drug delivery systems due to their relatively high drug encapsulation capacity, uniformity, tunable size, ease of preparation, minimal toxicity, stability in the presence of serum, and stimuli responsiveness. Nanogels show a great potential in chemotherapy, diagnosis, organ targeting and delivery of bioactive substances. The main subjects reviewed in this article concentrates on: (i) Nanogel assimilation in the nanomedicine domain; (ii) Features and advantages of nanogels, the main characteristics, such as: swelling capacity, stimuli sensitivity, the great surface area, functionalization, bioconjugation and encapsulation of bioactive substances, which are taken into account in designing the structures according to the application; some data on the advantages and limitations of the preparation techniques; (iii) Recent progress in nanogels as a carrier of genetic material, protein and vaccine. The majority of the scientific literature presents the multivalency potential of bioconjugated nanogels in various conditions. Today's research focuses over the overcoming of the restrictions imposed by cost, some medical requirements and technological issues, for nanogels' commercial scale production and their integration as a new platform in biomedicine.
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Affiliation(s)
- Iordana Neamtu
- a " Petru Poni" Institute of Macromolecular Chemistry , Iasi , Romania
| | | | - Alina Diaconu
- a " Petru Poni" Institute of Macromolecular Chemistry , Iasi , Romania
| | | | - Aurica P Chiriac
- a " Petru Poni" Institute of Macromolecular Chemistry , Iasi , Romania
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Nita LE, Chiriac AP, Diaconu A, Tudorachi N, Mititelu-Tartau L. Multifunctional nanogels with dual temperature and pH responsiveness. Int J Pharm 2016; 515:165-175. [PMID: 27725270 DOI: 10.1016/j.ijpharm.2016.10.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/04/2016] [Accepted: 10/06/2016] [Indexed: 10/20/2022]
Abstract
Over the last 10 years, the development of intelligent biomaterials for medical and pharmaceutical applications has attracted growing interest by combining interdisciplinary efforts. Between them nanogels represent one of the most attractive carriers for innovative drug delivery systems. In the present investigation new variants of multi-responsive nanogels have been synthesized by crosslinking poly(itaconic anhydride-co-3,9-divinyl-2,4,8,10-tetraoxaspiro [5.5] undecane) copolymer (having different molar ratios between comonomers) with 1,12-dodecandiol. The new structures were obtained by using modification of itaconic anhydride moieties in the copolymer. This is a convenient method for the preparation of a network with increased functionality, which further may ensure new strategies for coupling various bioactive compounds, especially owing to the behavior of the used copolymers, which present dual pH and temperature sensitive characteristics. The chemical structure of the new compounds was confirmed by FTIR and 1H RMN spectra. Also, the evaluation of thermal stability by thermogravimetric analysis sustains the covalent bonds occurring between the copolymer and diol. The dual responsiveness of the nanogel structures to temperature and pH was put into evidence by DLS studies. This feature can be used for the development of drug delivery systems, which can mimic biological response behavior to a certain extent. The new synthesized nanogels were tested as drug delivery systems by using diclofenac as a model drug. The results obtained from in vitro and in vivo investigation confirm the bioactivity of the nanogel networks.
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Affiliation(s)
- Loredana Elena Nita
- "PETRU PONI" Institute of Macromolecular Chemistry Grigore Ghica Voda Alley 41A, RO - 700487 Iasi, Romania
| | - Aurica P Chiriac
- "PETRU PONI" Institute of Macromolecular Chemistry Grigore Ghica Voda Alley 41A, RO - 700487 Iasi, Romania.
| | - Alina Diaconu
- "PETRU PONI" Institute of Macromolecular Chemistry Grigore Ghica Voda Alley 41A, RO - 700487 Iasi, Romania
| | - Nita Tudorachi
- "PETRU PONI" Institute of Macromolecular Chemistry Grigore Ghica Voda Alley 41A, RO - 700487 Iasi, Romania
| | - Liliana Mititelu-Tartau
- "Gr .T. Popa" University of Medicine and Pharmacy University Street 16, 700115 Iasi, Romania
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Dumitriu RP, Profire L, Nita LE, Dragostin OM, Ghetu N, Pieptu D, Vasile C. Sulfadiazine-Chitosan Conjugates and Their Polyelectrolyte Complexes with Hyaluronate Destined to the Management of Burn Wounds. Materials (Basel) 2015; 8:317-338. [PMID: 28787940 PMCID: PMC5455235 DOI: 10.3390/ma8010317] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 12/23/2014] [Indexed: 11/16/2022]
Abstract
In the present study polyelectrolyte complexes (PECs) based on new sulfadiazine-chitosan conjugates with sodium hyaluronate have been developed with potential use in treatment of burn wounds. The PECs were chemically characterized using Fourier Transform-Infrared Spectroscopy, Scanning Electon Microscopy and Near Infrared Chemical Imaging Technique. The swelling behavior and in vitro sulfadiazine release were also investigated. The antimicrobial activity was evaluated towards three bacterial strains: Escherichia coli, Listeria monocytogenes and Salmonella thyphymurium. The developed PECs demonstrated their antimicrobial efficiency against tested bacterial strains, the PECs containing sulfadiazine-modified chitosan being more active than PECs containing unmodified chitosan.
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Affiliation(s)
- Raluca Petronela Dumitriu
- Petru Poni" Institute of Macromolecular Chemistry, Department of Physical Chemistry of Polymers, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania.
| | - Lenuta Profire
- Grigore T. Popa" University of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, 16 University Street, 700115 Iasi, Romania.
| | - Loredana Elena Nita
- Petru Poni" Institute of Macromolecular Chemistry, Department of Physical Chemistry of Polymers, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania.
| | - Oana Maria Dragostin
- Grigore T. Popa" University of Medicine and Pharmacy, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, 16 University Street, 700115 Iasi, Romania.
| | - Nicolae Ghetu
- Grigore T. Popa" University of Medicine and Pharmacy, Faculty of Medicine, Department of Plastic and Reconstructive Surgery, 16 University Street, 700115 Iasi, Romania.
| | - Dragoș Pieptu
- Grigore T. Popa" University of Medicine and Pharmacy, Faculty of Medicine, Department of Plastic and Reconstructive Surgery, 16 University Street, 700115 Iasi, Romania.
| | - Cornelia Vasile
- Petru Poni" Institute of Macromolecular Chemistry, Department of Physical Chemistry of Polymers, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania.
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Cianga L, Bendrea AD, Fifere N, Nita LE, Doroftei F, Ag D, Seleci M, Timur S, Cianga I. Fluorescent micellar nanoparticles by self-assembly of amphiphilic, nonionic and water self-dispersible polythiophenes with “hairy rod” architecture. RSC Adv 2014. [DOI: 10.1039/c4ra10734a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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26
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Vasile C, Nita LE. Novel multi-stimuli responsive sodium alginate-grafted-poly(N-isopropylacrylamide) copolymers: II. Dilute solution properties. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.04.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chiriac AP, Neamtu I, Nita LE, Nistor MT. Sol gel method performed for biomedical products implementation. Mini Rev Med Chem 2011; 10:990-1013. [PMID: 20690901 DOI: 10.2174/1389557511009010990] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Accepted: 07/22/2010] [Indexed: 11/22/2022]
Abstract
Sol-gel technology is an impressive and instructive innovation in science that necessitates a multidisciplinary approach for its important applications in the practice. An important peculiarity of the sol gel technology is the possibility to control the mechanism and kinetics of the chemical reactions, thus monitoring the final structure (particle size, porosity, thin layer thickness) of the materials. The low processing temperature combined with the intrinsic bio-compatibility and environmental friendliness of the implied components makes it an ideal method applied in different biomedical purposes: the synthesis of porous matrices for entrapping of organic and inorganic compounds, sensor molecules, enzymes and many other biological molecules, selective coatings for optical and electrochemical biosensors, stationary phases for chromatography, immunoadsorbent and solid-phase extraction materials, controlled release agents, solid-phase biosynthesis, and unique matrices for biophysical studies. It is therefore the scope of this review to provide a few insights of the recent progresses made in sol-gel-based materials for biomedical applications.
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Affiliation(s)
- A P Chiriac
- "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley No. 41-A, 700487 IASI, Romania.
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Nita LE, Chiriac AP, Nistor M. An in vitro release study of indomethacin from nanoparticles based on methyl methacrylate/glycidyl methacrylate copolymers. J Mater Sci Mater Med 2010; 21:3129-3140. [PMID: 21046203 DOI: 10.1007/s10856-010-4171-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Accepted: 10/18/2010] [Indexed: 05/30/2023]
Abstract
Indomethacin was coupled onto some macromolecular nanostructures based on methyl methacrylate copolymers with glycidyl methacrylate and tested as a model drug. The polymeric matrices were synthesized by radical emulsion copolymerization with and without the presence of a continuous external magnetic field of 1500 Gs intensity. Mathematical analysis of the release data was performed using Higuchi, Peppas-Korsmeyer equations. NIR chemical imaging (NIR-CI) was used to provide information about the spatial distribution of the components in the studied nanostructures. This opportunity was used to visualize the spatial distribution of bioactive substances (indomethacin) into the polymeric matrix, as well as to evaluate the degree of chemical and/or physical heterogeneity of the bioactive samples. The release rate dependence on the synthesis conditions as well as on the chemical compositions of the tested polymeric systems, it was also evidenced.
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Affiliation(s)
- L E Nita
- Petru Poni Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley no. 41A, 700487, Iasi, Romania
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Nita LE, Chiriac AP, Neamtu I, Bercea M. Study of a binary interpenetrated polymeric complex by correlation of rheological parameters with zeta potential and conductivity. Colloids Surf B Biointerfaces 2009; 76:70-5. [PMID: 19896809 DOI: 10.1016/j.colsurfb.2009.10.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2009] [Revised: 10/07/2009] [Accepted: 10/08/2009] [Indexed: 11/20/2022]
Abstract
The interpenetrated macromolecular chains complexation between poly(aspartic acid) and poly(vinyl alcohol) in aqueous solution it was investigated. The interpolymer complexation process was evaluated through dynamic rheology. The aspects concerning the stability of the tested homopolymers and the prepared interpolymeric complex there were achieved from the evaluation of the aqueous solutions'zeta potential and also by determining the pH influence upon the zeta potential and the conductivity. The data obtained through the rheological dynamic measurements were correlated with the composition of the polymeric mixture, the dependence of zeta potential and conductivity. The study reveals the conditions for the formation of interpenetrated polymeric complex as being a ratio of 70wt.% PAS to 30wt.% PVA at 22 degrees C and 50/50 PAS/PVA ratio at 37 degrees C temperature. From the pH influence upon the zeta potential values it was evidenced the PAS aqueous solution does not reach the isoelectric point. At the same time, PVA solution and the complex PAS/PVA reaches the isoelectric point at strongly acid pH. The better stability of PAS, PVA and their mixture in solution is recorded in the alkaline domain (7.5<or=pH>or=12). The conductivity increases with the rising of the PAS content, pH and temperature. Other characteristics of the prepared interpenetrated polymeric structure, as for example thermal stability, there are also presented.
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Affiliation(s)
- Loredana Elena Nita
- Petru Poni Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley No. 41-A, IASI, Romania
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Nita LE, Chiriac AP, Cimmino S, Silvestre C, Duraccio D, Vasile C. Polymerization in magnetic field: XVIII. Influence of surfactant nature on the synthesis and thermal properties of poly(methyl methacrylate) and poly[(methyl methacrylate)-co
-(epoxypropyl methacrylate)]. POLYM INT 2007. [DOI: 10.1002/pi.2355] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Elena Nita L, Chiriac AP. Polymerization in a magnetic field, part 17: Styrene copolymerization with 2,3-epoxypropyl methacrylate. J Appl Polym Sci 2007. [DOI: 10.1002/app.25223] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Elena Nita L, Chiriac AP, Vasile C. Possibilities of collagen adsorption on some polymeric matrices based on styrene copolymers. J Appl Polym Sci 2006. [DOI: 10.1002/app.22836] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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