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López Terán JL, Cabrera Maldonado EV, Araque Rangel JDC, Poveda Otazo J, Beltrán Rico MI. Development of Antibacterial Thermoplastic Starch with Natural Oils and Extracts: Structural, Mechanical and Thermal Properties. Polymers (Basel) 2024; 16:180. [PMID: 38256979 PMCID: PMC10818525 DOI: 10.3390/polym16020180] [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: 12/12/2023] [Revised: 12/28/2023] [Accepted: 01/02/2024] [Indexed: 01/24/2024] Open
Abstract
In this study, the influence of the incorporation of eucalyptus (EO), tea tree (TT) and rosemary (RO) essential oils and Chiriyuyo extract (CE) on the structure and properties of thermoplastic starch (TPS) obtained from potato starch, glycerin and water was evaluated. All oils and the extract were used at a concentration of 0.5 g/100 g of TPS, while for TT, the effect of the concentration was also studied. The mixtures obtained were processed by extrusion and thermocompression molding. The sheets were characterized by XRD, FTIR, TGA, SEM and analyses of their mechanical properties, antimicrobial characteristics and biodegradability. The results show that the use of small concentrations of the oils in 70TPS does not induce changes in the TPS structure according to the results of XRD, FTIR and TGA, with each essential oil and CE affecting the mechanical properties unevenly, although in all cases, antimicrobial activity was obtained, and the biodegradability of TPS in soil was not modified. An increase in the concentration of TT in 60TPS causes marked changes in the crystallinity of TPS, providing a greater modulus with a higher concentration of TT. Regardless of the amount of TT, all sheets maintain antimicrobial characteristics, and their biodegradation in soil is delayed with a higher oil content.
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Affiliation(s)
- Jorge Luis López Terán
- Grupo de Investigación de Moléculas y Materiales Funcionales (MoléMater), Facultad de Ingeniería Química, Universidad Central del Ecuador, Ritter s/n y Bolivia, Quito E. C. 170521, Ecuador; (J.L.L.T.); (E.V.C.M.)
| | - Elvia Victoria Cabrera Maldonado
- Grupo de Investigación de Moléculas y Materiales Funcionales (MoléMater), Facultad de Ingeniería Química, Universidad Central del Ecuador, Ritter s/n y Bolivia, Quito E. C. 170521, Ecuador; (J.L.L.T.); (E.V.C.M.)
| | - Judith del Carmen Araque Rangel
- Grupo de Investigación de Moléculas y Materiales Funcionales (MoléMater), Facultad de Ingeniería en Geología, Minas, Petróleos y Ambiental, Universidad Central del Ecuador, Jerónimo Leyton y Av. La Gasca, Quito C. P. 170521, Ecuador;
| | - José Poveda Otazo
- Departamento de Ingeniería Química, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain;
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Andreica BI, Anisiei A, Iftime MM, Ababei RV, Ochiuz L, Vasincu D, Vasilache IA, Volovat C, Boboc D, Poroch V, Eva L, Agop M, Scripcariu DV, Volovat SR. Theoretical-Experimental Approach of Chitosan/Quaternized Chitosan Nanofibers' Behavior in Wound Exudate Media. Pharmaceutics 2023; 15:2722. [PMID: 38140063 PMCID: PMC10748138 DOI: 10.3390/pharmaceutics15122722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/01/2023] [Accepted: 11/06/2023] [Indexed: 12/24/2023] Open
Abstract
This study aimed to investigate the behavior of chitosan/quaternized chitosan fibers in media mimicking wound exudates to understand their capacities as wound dressing. Fiber analysis of the fibers using dynamic vapor sorption proved their ability to adsorb moisture up to 60% and then to desorb it as a function of humidity, indicating their outstanding breathability. Dissolution analyses showed that quaternized chitosan leached from the fibers in water and PBS, whereas only small portions of chitosan were solubilized in water. In media containing lysozyme, the fibers degraded with a rate determined by their composition and pH, reaching a mass loss of up to 47% in media of physiologic pH. Notably, in media mimicking the wound exudate during healing, they adsorbed moisture even when their mass loss due to biodegradation was high, whereas they were completely degraded in the media of normal tissues, indicating bioabsorbable dressing capacities. A mathematical model was constructed, which characterized the degradation rate and morphology changes of chitosan/quaternized chitosan fibers through analyses of dynamics in scale space, using the Theory of Scale Relativity. The model was validated using experimental data, making it possible to generalize it to the degradation of other biopolymeric systems that address wound healing.
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Affiliation(s)
- Bianca-Iustina Andreica
- “Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley, 41A, 700487 Iasi, Romania; (B.-I.A.); (A.A.); (M.-M.I.)
| | - Alexandru Anisiei
- “Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley, 41A, 700487 Iasi, Romania; (B.-I.A.); (A.A.); (M.-M.I.)
| | - Manuela-Maria Iftime
- “Petru Poni” Institute of Macromolecular Chemistry, Gr. Ghica Voda Alley, 41A, 700487 Iasi, Romania; (B.-I.A.); (A.A.); (M.-M.I.)
| | - Razvan-Vasile Ababei
- Laboratory of Applied Meteorology and Climatology, A Building, Physics, Research Center with Integrated Techniques for Atmospheric Aerosol Investigation in Romania, RECENT AIR, Alexandru Ioan Cuza University of Iasi, 11 Carol I, 700506 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, Iasi 700115, Romania;
| | - Ingrid-Andrada Vasilache
- Department of Obstetrics and Gynecology, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Constantin Volovat
- Department of Medical Oncology-Radiotherapy, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania; (D.B.); (S.R.V.)
| | - Diana Boboc
- Department of Medical Oncology-Radiotherapy, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania; (D.B.); (S.R.V.)
| | - Vladimir Poroch
- Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania;
| | - Lucian Eva
- “Prof. Dr. Nicolae Oblu” Emergency Clinical Hospital, 2 Ateneului Street, 700309 Iasi, Romania;
| | - Maricel Agop
- Department of Physics, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania;
- Romanian Scientists Academy, 050094 Bucharest, Romania
| | - Dragos-Viorel Scripcariu
- Department of Surgery, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania;
| | - Simona Ruxandra Volovat
- Department of Medical Oncology-Radiotherapy, “Grigore T. Popa” University of Medicine and Pharmacy, 16 University Str., 700115 Iasi, Romania; (D.B.); (S.R.V.)
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Borges-Vilches J, Unalan I, Aguayo CR, Fernández K, Boccaccini AR. Multifunctional Chitosan Scaffold Platforms Loaded with Natural Polyphenolic Extracts for Wound Dressing Applications. Biomacromolecules 2023; 24:5183-5193. [PMID: 37906697 DOI: 10.1021/acs.biomac.3c00727] [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: 11/02/2023]
Abstract
Chitosan (CS)-based scaffolds loaded with Pinus radiata extract bark (PE) and grape seed extract (GSE) were successfully developed for wound dressing applications. The effects of incorporating GSE and PE in CS scaffolds were investigated in relation to their physicochemical and biological properties. All scaffolds exhibited porous structures with the ability to absorb more than 70 times their weight when contacted with blood and phosphate buffer solution. The incorporation of GSE and PE into the CS scaffolds increased their blood absorption ability and degradation rates over time. All scaffolds showed a clotting ability above 95%, with their surfaces being favorable for red blood cell attachment. Both GSE and PE were released from the CS scaffolds in a sustained manner. Scaffolds loaded with GSE and PE inhibited the bacterial activity of S. aureus and E. coli by 40% and 44% after 24 h testing. In vitro cell viability studies demonstrated that all scaffolds were nontoxic to HaCaT cells. Importantly, the addition of GSE and PE further increased cell viability compared to that of the CS scaffold. This study provides a new synthesis method to immobilize GSE and PE on CS scaffolds, enabling the formation of novel material platforms with a high potential for wound dressing applications.
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Affiliation(s)
- Jessica Borges-Vilches
- Laboratory of Biomaterials, Department of Chemical Engineering, Faculty of Engineering, Universidad de Concepción, Concepción 4030000, Chile
| | - Irem Unalan
- Institute of Biomaterials, Department of Materials Science and Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Cauerstraße 6, 91058 Erlangen, Germany
| | - Claudio R Aguayo
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, Universidad de Concepción, Concepción 4030000, Chile
| | - Katherina Fernández
- Laboratory of Biomaterials, Department of Chemical Engineering, Faculty of Engineering, Universidad de Concepción, Concepción 4030000, Chile
| | - Aldo R Boccaccini
- Institute of Biomaterials, Department of Materials Science and Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Cauerstraße 6, 91058 Erlangen, Germany
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Mateus Pereira de Souza N, Hunter Machado B, Koche A, Beatriz Fernandes da Silva Furtado L, Becker D, Antonio Corbellini V, Rieger A. Detection of metabolic syndrome with ATR-FTIR spectroscopy and chemometrics in blood plasma. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 288:122135. [PMID: 36442341 DOI: 10.1016/j.saa.2022.122135] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/02/2022] [Accepted: 11/16/2022] [Indexed: 06/16/2023]
Abstract
Metabolic Syndrome (MetS) is a constellation of 3 or more risk factor (abdominal obesity, high triglycerides, low HDL-c, high blood pressure, and elevated blood glucose) for atherosclerotic cardiovascular disease. Considering these systemic metabolic changes in the biochemical pathways of all biomolecules, Attenuated Total Reflection-Fourier Transform Infrared (ATR-FTIR) spectroscopy is a rapid, low-cost, and reagent-free alternative technique capable of identifying spectral biomarkers that differentiate subjects with MetS from control. In this study, plasma samples from 74 subjects (14 MetS, 60 control) were analyzed on the ATR-FTIR spectrophotometer. The objective was to differentiate subjects with MetS from control with supervised chemometrics modeling (Orthogonal Partial Least Squares-Discriminant Analysis, OPLS-DA). Additionally, the inflammatory status of subjects with MetS and control (supervised by C-reactive protein - CRP, leptin, and cell-free DNA - cfDNA) was verified. The OPLS-DA model achieved 100% sensitivity and specificity in cross-validation. For 1 latent variable (93.4% of variance), RMSECV < 0.002, PRESS CV < 0.0001, and R2 > 0.9999 was obtained. Significant spectrochemical differences (p < 0.05) were found between MetS and control subjects in the following biomolecular regions (cm-1): 1717-1703 [ν(CO) and δ(NH)], 1166-1137 [ν(C-OH) + ν(CO) and ν(CC) + δ(OH) + ν(CO)], 1113-1040 [ν(PO2-) and ν(C-OH)], and 1027-1008 [ν(CO) and v(CH2OH)]. In the OPLS-DA model loadings, amide I [1720-1600 cm-1, ν(CO)] and amide II [1570-1480 cm-1, δ(NH) + ν(CH)] had significantly greater weight than all other regions. There was a significant difference in inflammatory status between MetS patient and control (p < 0.05 for CRP and leptin, and p < 0.01 for cfDNA).
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Affiliation(s)
| | - Brenda Hunter Machado
- International Affairs, International University Centre, Santa Cruz do Sul, RS, Brazil.
| | - Andreia Koche
- Department of Life Sciences, University of Santa Cruz do Sul, Santa Cruz do Sul, RS, Brazil.
| | | | - Débora Becker
- Bachelor of Biological Sciences, University of Santa Cruz do Sul, Santa Cruz do Sul, RS, Brazil
| | - Valeriano Antonio Corbellini
- Department of Sciences, Humanities and, Education, University of Santa Cruz do Sul, Santa Cruz do Sul, RS, Brazil; Postgraduate Program in Health Promotion, University of Santa Cruz do Sul, Santa Cruz do Sul, RS, Brazil; Postgraduate Program in Environmental Technology, University of Santa Cruz do Sul, RS, Brazil.
| | - Alexandre Rieger
- Department of Life Sciences, University of Santa Cruz do Sul, Santa Cruz do Sul, RS, Brazil; Postgraduate Program in Health Promotion, University of Santa Cruz do Sul, Santa Cruz do Sul, RS, Brazil; Postgraduate Program in Environmental Technology, University of Santa Cruz do Sul, RS, Brazil.
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