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Himiniuc LM, Socolov R, Nica I, Agop M, Volovat C, Ochiuz L, Vasincu D, Rotundu AM, Rosu IA, Ghizdovat V, Volovat SR. Theoretical and Experimental Aspects of Sodium Diclofenac Salt Release from Chitosan-Based Hydrogels and Possible Applications. Gels 2023; 9:gels9050422. [PMID: 37233013 DOI: 10.3390/gels9050422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 05/06/2023] [Accepted: 05/11/2023] [Indexed: 05/27/2023] Open
Abstract
Two formulations based on diclofenac sodium salt encapsulated into a chitosan hydrogel were designed and prepared, and their drug release was investigated by combining in vitro results with mathematical modeling. To understand how the pattern of drug encapsulation impacted its release, the formulations were supramolecularly and morphologically characterized by scanning electron microscopy and polarized light microscopy, respectively. The mechanism of diclofenac release was assessed by using a mathematical model based on the multifractal theory of motion. Various drug-delivery mechanisms, such as Fickian- and non-Fickian-type diffusion, were shown to be fundamental mechanisms. More precisely, in a case of multifractal one-dimensional drug diffusion in a controlled-release polymer-drug system (i.e., in the form of a plane with a certain thickness), a solution that allowed the model's validation through the obtained experimental data was established. The present research reveals possible new perspectives, for example in the prevention of intrauterine adhesions occurring through endometrial inflammation and other pathologies with an inflammatory mechanism background, such as periodontal diseases, and also therapeutic potential beyond the anti-inflammatory action of diclofenac as an anticancer agent, with a role in cell cycle regulation and apoptosis, using this type of drug-delivery system.
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Affiliation(s)
- Loredana Maria Himiniuc
- Department of Obstetrics and Gynecology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Razvan Socolov
- Department of Obstetrics and Gynecology, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Irina Nica
- Department of Odontology-Periodontology, Fixed Prosthesis, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Maricel Agop
- Department of Physics, "Gheorghe Asachi" Technical University of Iasi, 700050 Iasi, Romania
- Romanian Scientists Academy, 050094 Bucharest, Romania
| | - Constantin Volovat
- Department of Medical Oncology-Radiotherapy, "Grigore T. Popa" University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania
| | - Lacramioara Ochiuz
- Faculty of Pharmacy, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Decebal Vasincu
- Department of Biophysics, Faculty of Dental Medicine, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Ana Maria Rotundu
- Faculty of Physics, "Alexandru Ioan Cuza" University of Iasi, 700506 Iasi, Romania
| | - Iulian Alin Rosu
- Faculty of Physics, "Alexandru Ioan Cuza" University of Iasi, 700506 Iasi, Romania
| | - Vlad Ghizdovat
- Department of Biophysics and Medical Physics, "Grigore T. Popa" University of Medicine and Pharmacy, Iasi 700115, Romania
| | - Simona Ruxandra Volovat
- Department of Medical Oncology-Radiotherapy, "Grigore T. Popa" University of Medicine and Pharmacy, 16 University Street, 700115 Iasi, Romania
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Shape memory luminescent cellulose/chitosan hydrogel for high sensitive detection of formaldehyde. Int J Biol Macromol 2023; 233:123570. [PMID: 36758764 DOI: 10.1016/j.ijbiomac.2023.123570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 01/19/2023] [Accepted: 02/03/2023] [Indexed: 02/10/2023]
Abstract
Hybrid hydrogels containing biomacromolecules have been widely used in sensors, fluorescent probes, and other fields due to their high biocompatibility and nontoxicity. In this paper, tough hydrogels with interconnected macro-pores have been fabricated by freeze-induced chemical cross-linking of microfibrillated cellulose (MFC) and organic modified chitosan (CS). In this hydrogel materials, three-dimensional networks were formed by abundant hydrogen bonds and chemical cross-linking. Luminescent lanthanide complexes were covalently bonded to the hydrogel networks through coordination of Eu3+ ions with 2, 3-pyridine dicarboxylic acid modified chitosan. The luminescence of hydrogel materials was further improved by the replacement of coordination water with 2-thiophenyltrifluoroacetone (TTA). The prepared hydrogels showed excellent shape memory properties both under water and in air. The stress of the hybrid hydrogel at 80 % strain can reach 159 kPa, which is much higher than that of the traditional microfibrillated cellulose-based hydrogels. The obtained luminescent hybrid hydrogels exhibited an excellent fluorescence detection effect on formaldehyde. The detection limit for formaldehyde is 45.7 ppb, which is much lower than the WHO standard (80 ppb for indoor air). The novel, facile preparing procedure may extend the potential applications of hybrid lanthanide luminescent hydrogel as fluorescence probes for pollution monitoring, especially for formaldehyde and other organic aldehydes.
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