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Filip D, Macocinschi D, Zaltariov MF, Gafitanu CA, Tuchilus CG, Bele A, Ciubotaru BI, Stoleru E, Bargan A. Mucoadhesive and Antimicrobial Allantoin/β Cyclodextrins-Loaded Carbopol Gels as Scaffolds for Regenerative Medicine. Gels 2022; 8:gels8070416. [PMID: 35877501 PMCID: PMC9320337 DOI: 10.3390/gels8070416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 06/24/2022] [Accepted: 06/30/2022] [Indexed: 02/04/2023] Open
Abstract
Allantoin and its β-cyclodextrin and hydroxypropyl-β-cyclodextrin inclusion complexes 1:1 have been used to prepare carbopol-based mucoadhesive gels. The gelation process occurred by adjustment with glycerol 10% in the presence of triethanolamine. The structural features induced by the presence of allantoin and the corresponding β-cyclodextrins inclusion complexes have been first investigated by infrared spectroscopy highlighting strong interactions within the gels network and ideal crosslinks for the self-healing behavior. The hydrophilicity of the gels was investigated by the determination of the surface tension parameters and the free energy of hydration. The interfacial free energy values indicated prolonged biocompatibility with blood. The gels-water molecule interactions in terms of sorption, permeability, and diffusion coefficients were evaluated by dynamic vapor sorption analysis. The self-assembly process through intermolecular H-bonding, the high hydrophilicity, the mechanical performance, the hydrolytic stability in simulated biological media, the biocompatibility with normal human dermal fibroblast (NHDF) cells, the mucoadhesivity and antimicrobial activity on selected microorganism species (S. Aureus and C. albicans) of the allantoin-based gels recommend them as promising scaffold alternatives in regenerative medicine.
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Affiliation(s)
- Daniela Filip
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
| | - Doina Macocinschi
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
- Correspondence: (D.M.); (M.-F.Z.)
| | - Mirela-Fernanda Zaltariov
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
- Correspondence: (D.M.); (M.-F.Z.)
| | - Carmen Anatolia Gafitanu
- Department of Pharmaceutical Technology, Faculty of Pharmacy, “Gr. T. Popa” University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania;
| | - Cristina Gabriela Tuchilus
- “Microbiology Department, Faculty of Medicine, “Gr. T. Popa” University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania;
| | - Adrian Bele
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
| | - Bianca-Iulia Ciubotaru
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
| | - Elena Stoleru
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
| | - Alexandra Bargan
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
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Affiliation(s)
- Matthew L. Bedell
- Department of Bioengineering, Rice University, 6500 South Main Street, Houston, Texas 77030, United States
| | - Adam M. Navara
- Department of Bioengineering, Rice University, 6500 South Main Street, Houston, Texas 77030, United States
| | - Yingying Du
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
- Institute of Regulatory Science for Medical Devices, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shengmin Zhang
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
- Institute of Regulatory Science for Medical Devices, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Antonios G. Mikos
- Department of Bioengineering, Rice University, 6500 South Main Street, Houston, Texas 77030, United States
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The effects of nanoclay on thermal, mechanical and rheological properties of LLDPE/chitosan blend. JOURNAL OF POLYMER ENGINEERING 2017. [DOI: 10.1515/polyeng-2015-0350] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The objective of this study was to prepare linear low density polyethylene (LLDPE)/chitosan/closite nanocomposites by using various concentrations of LLDPE, chitosan, and closite clay mineral. The nanocomposites were then characterized for their thermal, mechanical, and rheological properties by using different analytical techniques including thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), rheological characterization, tensile strength study, and scanning electron microscopy. The TGA demonstrated that crosslinked composites are thermally more stable than non-crosslinked composites. The DSC stated that the percentage crystallinity of crosslinked composites is lower than the non-crosslinked composites. It is also observed that the increasing quantity of chitosan and closite also reduces the percentage crystallinity of the prepared nanocomposites. Rheological characterization revealed that, crosslinked composites are viscoelastic in nature and have high complex viscosities (η*) and high dynamic shear storage modulus (G′), while non-crosslinked composites showed high dynamic shear loss modulus (G″). Tensile strength of crosslinked composites was much higher than non-crosslinked composites, however elongation at break (Eb) values of non-crosslinked composites are higher than crosslinked composites. The scanning electron microscopy displayed strong adhesion between matrix-filler-interphase in crosslinked composites, while some gaps were also observed in non-crosslinked composites. As a conclusion, chitosan, closite clay, and the LLDPE based nanocomposites with improved thermal, mechanical, and rheological properties can be successfully prepared by employing a peroxide-initiated melt compounding technique.
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Chemical measurements of polyethylene glycol shells on gold nanoparticles in the presence of aggregation. Biointerphases 2016; 11:04B306. [PMID: 27903070 DOI: 10.1116/1.4968882] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Understanding and controlling the performance of engineered nanoparticle (NP) systems is greatly assisted by quantitative characterization of their coatings. Useful measurements methods have been described for NPs in liquid environment, but NP aggregation often represents a limiting factor which impairs the accuracy of techniques such as dynamic light scattering for quantification purposes. Here, the authors show how differential centrifugal sedimentation (DCS) and x-ray photoelectron spectroscopy (XPS) can provide quantitative information on the NP coating thickness, molecular conformation, and grafting density of aggregated NP samples. The authors find that thiol-terminated methoxy polyethylene glycol (mPEG) coating thickness on gold NPs increases with increasing particle size and mPEG molecular weight. The hydration of the mPEG shell was estimated by comparing the shell thickness measured in liquid by DCS and vacuum by XPS and was found to increase with the mPEG molecular weight. Finally, the authors used XPS to measure the grafting density of the mPEG molecules. This was found to depend on the mPEG molecular volume and decreased for larger mPEG molecules, suggesting that the grafting density is determined by the conformation of the mPEG molecules in liquid. This analysis provides practical measurement methods for optimizing the design of engineered NP systems and ultimately enhance and control their performance.
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