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Sari BR, Yesilot S, Ozmen O, Aydin Acar C. Superior In Vivo Wound-Healing Activity of Biosynthesized Silver Nanoparticles with Nepeta cataria (Catnip) on Excision Wound Model in Rat. Biol Trace Elem Res 2024:10.1007/s12011-024-04268-4. [PMID: 38865065 DOI: 10.1007/s12011-024-04268-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 06/06/2024] [Indexed: 06/13/2024]
Abstract
Silver nanoparticles were biosynthesized with Nepeta cataria plant extract. It was determined that the synthesized Nc-AgNPs gave a strong absorbance peak at 438 nm wavelength in the UV-vis spectrophotometer. SEM and TEM analyses of Nc-AgNPs showed that the synthesized nanoparticles had a spherical morphology. Based on XRD analysis, the average crystallite size of Nc-AgNPs was calculated at 15.74 nm. At the same time, EDS spectrum analysis exhibited dominant emission energy at 3 keV, indicative of Nc-AgNPs. Nc-AgNPs showed an inhibition zone of 12 nm in gram-negative Escherichia coli, 10 nm in gram-positive Enterococcus faecalis, and 11 nm in Staphylococcus aureus. Nc-AgNPs showed high antioxidant properties, with 63% at 5000 μg/mL. The wound-healing properties of Nc-AgNPs were evaluated in vivo in wound models created in a total of 20 Wistar albino male rats, divided into four groups. After 10 days of treatment, the highest wound closure rate was seen in the Nc-AgNP + Vaseline (Group IV) treatment group, at 94%. It was observed that Nc-AgNP + Vaseline nanoformulation significantly increased wound healing, similar to Silverdin®, and Vaseline alone supported healing but did not result in complete closure. Histopathological examination revealed an increase in mature Type 1 collagen in Group IV and positive control (Group II), with better collagen maturation in vehicle control (Group III) compared to negative control (Group I). Immunohistochemical analysis showed complete epithelialization in Group IV and Group II, with distinct cytokeratin expressions, while Group III exhibited mild expressions.
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Affiliation(s)
- Berfin Rumeysa Sari
- Department of Health and Biomedical Sciences, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - Sukriye Yesilot
- Department of Health and Biomedical Sciences, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
- Department of Nursing, Bucak School of Health, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - Ozlem Ozmen
- Veterinary Faculty, Department of Pathology, Burdur Mehmet Akif Ersoy University, Burdur, Turkey
| | - Cigdem Aydin Acar
- Department of Health and Biomedical Sciences, Burdur Mehmet Akif Ersoy University, Burdur, Turkey.
- Department of Nursing, Bucak School of Health, Burdur Mehmet Akif Ersoy University, Burdur, Turkey.
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Dahma Z, Torrado-Salmerón C, Álvarez-Álvarez C, Guarnizo-Herrero V, Martínez-Alonso B, Torrado G, Torrado-Santiago S, de la Torre-Iglesias PM. Topical Meloxicam Hydroxypropyl Guar Hydrogels Based on Low-Substituted Hydroxypropyl Cellulose Solid Dispersions. Gels 2024; 10:207. [PMID: 38534625 DOI: 10.3390/gels10030207] [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: 01/31/2024] [Revised: 03/12/2024] [Accepted: 03/15/2024] [Indexed: 03/28/2024] Open
Abstract
Meloxicam (MX) is a poorly water-soluble drug with severe gastrointestinal side effects. Topical hydrogel of hydroxypropyl guar (HPG) was formulated using a solid dispersion (SD) of MX with hydroxypropyl cellulose (LHPC) as an alternative to oral administration. The development of a solid dispersion with an adequate MX:LHPC ratio could increase the topical delivery of meloxicam. Solid dispersions showed high MX solubility values and were related to an increase in hydrophilicity. The drug/polymer and polymer/polymer interactions of solid dispersions within the HPG hydrogels were evaluated by SEM, DSC, FTIR, and viscosity studies. A porous structure was observed in the solid dispersion hydrogel MX:LHPC (1:2.5) and its higher viscosity was related to a high increase in hydrogen bonds among the -OH groups from LHPC and HPG with water molecules. In vitro drug release studies showed increases of 3.20 and 3.97-fold for hydrogels with MX:LHPC ratios of (1:1) and (1:2.5), respectively, at 2 h compared to hydrogel with pure MX. Finally, a fitting transition from zero to first-order model was observed for these hydrogels containing solid dispersions, while the n value of Korsmeyer-Peppas model indicated that release mechanism is governed by diffusion through an important relaxation of the polymer.
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Affiliation(s)
- Zaid Dahma
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
| | - Carlos Torrado-Salmerón
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
- Instituto Universitario de Farmacia Industrial, Complutense University of Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
| | - Covadonga Álvarez-Álvarez
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
- Instituto Universitario de Farmacia Industrial, Complutense University of Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
| | - Víctor Guarnizo-Herrero
- Department of Biomedical Science, Faculty of Pharmacy, University of Alcalá de Henares, Ctra Madrid-Barcelona Km 33600, 28805 Madrid, Spain
| | - Borja Martínez-Alonso
- Department of Biomedical Science, Faculty of Pharmacy, University of Alcalá de Henares, Ctra Madrid-Barcelona Km 33600, 28805 Madrid, Spain
| | - Guillermo Torrado
- Department of Biomedical Science, Faculty of Pharmacy, University of Alcalá de Henares, Ctra Madrid-Barcelona Km 33600, 28805 Madrid, Spain
| | - Santiago Torrado-Santiago
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
- Instituto Universitario de Farmacia Industrial, Complutense University of Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
| | - Paloma Marina de la Torre-Iglesias
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
- Instituto Universitario de Farmacia Industrial, Complutense University of Madrid, Plaza Ramón y Cajal s/n, 28040 Madrid, Spain
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Whitley A, Baláž P, Kavalírek J, Hanusová J, Gürlich R. Evaluating the impact of an anti-microbial silver-impregnated surgical dressing on wound infections and healing: A randomised clinical trial. Wound Repair Regen 2024; 32:67-73. [PMID: 38111101 DOI: 10.1111/wrr.13142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/09/2023] [Accepted: 11/19/2023] [Indexed: 12/20/2023]
Abstract
StopBac is an innovative silver-impregnated antimicrobial dressing specifically designed to reduce surgical site infections and enhance healing. The primary objective of this study was to compare infection healing rate at 30 days after surgery between primarily closed surgical wounds covered with StopBac and those covered with Cosmorpor, a standard surgical dressing. Between 1.3.2023 and 30.4.2023, we conducted a prospective screening of all patients undergoing surgical operations within a single surgical department. Patients were randomised into either the Cosmopor group or the StopBac group. Outcome measures were superficial and deep surgical site infections and healed wounds. Data concerning patient and surgical factors were prospectively collected and analysed. The analysis comprised 275 patients, divided into two groups: 140 patients in the StopBac group and 135 in the Cosmopor group. The StopBac dressing was associated with a reduced rate of infection, with an odds ratio of 0.288 (p < 0.001), and an increased likelihood of wound healing at 30 days after surgery. The odds ratio for healing at 30 days was 4.661 (p < 0.001). StopBac was associated with a lower incidence of surgical wound infections and a higher probability of healing at 30 days after surgery, when compared with standard dressing.
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Affiliation(s)
- Adam Whitley
- Department of Surgery, University Hospital Královské Vinohrady, Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Peter Baláž
- Department of Surgery, University Hospital Královské Vinohrady, Third Faculty of Medicine, Charles University, Prague, Czech Republic
- Vascular Surgery, Cardiocenter, University Hospital Královské Vinohrady, Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Jan Kavalírek
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | - Jitka Hanusová
- Faculty of Biomedical Engineering, Czech Technical University in Prague, Prague, Czech Republic
| | - Robert Gürlich
- Department of Surgery, University Hospital Královské Vinohrady, Third Faculty of Medicine, Charles University, Prague, Czech Republic
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Voycheva C, Slavkova M, Popova T, Tzankova D, Stefanova D, Tzankova V, Ivanova I, Tzankov S, Spassova I, Kovacheva D, Tzankov B. Thermosensitive Hydrogel-Functionalized Mesoporous Silica Nanoparticles for Parenteral Application of Chemotherapeutics. Gels 2023; 9:769. [PMID: 37754450 PMCID: PMC10530711 DOI: 10.3390/gels9090769] [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: 08/29/2023] [Revised: 09/16/2023] [Accepted: 09/18/2023] [Indexed: 09/28/2023] Open
Abstract
Hydrogels can offer many opportunities for drug delivery strategies. They can be used on their own, or their benefits can be further exploited in combination with other nanocarriers. Intelligent hydrogels that react to changes in the surrounding environment can be utilized as gatekeepers and provide sustained on-demand drug release. In this study, a hybrid nanosystem for temperature- and pH-sensitive delivery was prepared from MCM-41 nanoparticles grafted with a newly synthesized thermosensitive hydrogel (MCM-41/AA-g-PnVCL). The initial particles were chemically modified by the attachment of carboxyl groups. Later, they were grafted with agar (AA) and vinylcaprolactam (VCL) by free radical polymerization. Doxorubicin was applied as a model hydrophilic chemotherapeutic drug. The successful formulation was confirmed by FT-IR and TGA. Transmission electron microscopy and dynamic light scattering analysis showed small particles with negative zeta potential. Their release behaviour was investigated in vitro in media with different pH and at different temperatures. Under tumour simulating conditions (40 °C and pH 4.0), doxorubicin was almost completely released within 72 h. The biocompatibility of the proposed nanoparticles was demonstrated by in vitro haemolysis assay. These results suggest the possible parenteral application of the newly prepared hydrogel-functionalized mesoporous silica nanoparticles for temperature-sensitive and pH-triggered drug delivery at the tumour site.
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Affiliation(s)
- Christina Voycheva
- Department Pharmaceutical Technology and Biopharmacy, Faculty of Pharmacy, Medical University—Sofia, 1000 Sofia, Bulgaria; (C.V.); (T.P.); (B.T.)
| | - Marta Slavkova
- Department Pharmaceutical Technology and Biopharmacy, Faculty of Pharmacy, Medical University—Sofia, 1000 Sofia, Bulgaria; (C.V.); (T.P.); (B.T.)
| | - Teodora Popova
- Department Pharmaceutical Technology and Biopharmacy, Faculty of Pharmacy, Medical University—Sofia, 1000 Sofia, Bulgaria; (C.V.); (T.P.); (B.T.)
| | - Diana Tzankova
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Medical University—Sofia, 1000 Sofia, Bulgaria;
| | - Denitsa Stefanova
- Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University—Sofia, 1000 Sofia, Bulgaria; (D.S.); (V.T.)
| | - Virginia Tzankova
- Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Pharmacy, Medical University—Sofia, 1000 Sofia, Bulgaria; (D.S.); (V.T.)
| | - Ivelina Ivanova
- Faculty of Pharmacy, Medical University—Pleven, 5800 Pleven, Bulgaria; (I.I.); (S.T.)
| | - Stanislav Tzankov
- Faculty of Pharmacy, Medical University—Pleven, 5800 Pleven, Bulgaria; (I.I.); (S.T.)
| | - Ivanka Spassova
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (I.S.); (D.K.)
| | - Daniela Kovacheva
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria; (I.S.); (D.K.)
| | - Borislav Tzankov
- Department Pharmaceutical Technology and Biopharmacy, Faculty of Pharmacy, Medical University—Sofia, 1000 Sofia, Bulgaria; (C.V.); (T.P.); (B.T.)
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