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Ebrahimi M, Arreguín-Campos M, Dookhith AZ, Aldana AA, Lynd NA, Sanoja GE, Baker MB, Pitet LM. Tailoring Network Topology in Mechanically Robust Hydrogels for 3D Printing and Injection. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38712527 DOI: 10.1021/acsami.4c03209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Tissue engineering and regenerative medicine are confronted with a persistent challenge: the urgent demand for robust, load-bearing, and biocompatible scaffolds that can effectively endure substantial deformation. Given that inadequate mechanical performance is typically rooted in structural deficiencies─specifically, the absence of energy dissipation mechanisms and network uniformity─a crucial step toward solving this problem is generating synthetic approaches that enable exquisite control over network architecture. This work systematically explores structure-property relationships in poly(ethylene glycol)-based hydrogels constructed utilizing thiol-yne chemistry. We systematically vary polymer concentration, constituent molar mass, and cross-linking protocols to understand the impact of architecture on hydrogel mechanical properties. The network architecture was resolved within the molecular model of Rubinstein-Panyukov to obtain the densities of chemical cross-links and entanglements. We employed both nucleophilic and radical pathways, uncovering notable differences in mechanical response, which highlight a remarkable degree of versatility achievable by tuning readily accessible parameters. Our approach yielded hydrogels with good cell viability and remarkably robust tensile and compression profiles. Finally, the hydrogels are shown to be amenable to advanced processing techniques by demonstrating injection- and extrusion-based 3D printing. Tuning the mechanism and network regularity during the cell-compatible formation of hydrogels is an emerging strategy to control the properties and processability of hydrogel biomaterials by making simple and rational design choices.
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Affiliation(s)
- Mahsa Ebrahimi
- Advanced Functional Polymers (AFP) Laboratory, Institute for Materials Research (imo-imomec), Hasselt University, Martelarenlaan 42, Hasselt 3500, Belgium
- Department of Instructive Biomaterials Engineering and Department of Complex Tissue Regeneration, MERLN Institute for Technology Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, Maastricht 6229 ET, The Netherlands
| | - Mariana Arreguín-Campos
- Advanced Functional Polymers (AFP) Laboratory, Institute for Materials Research (imo-imomec), Hasselt University, Martelarenlaan 42, Hasselt 3500, Belgium
- Department of Instructive Biomaterials Engineering and Department of Complex Tissue Regeneration, MERLN Institute for Technology Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, Maastricht 6229 ET, The Netherlands
| | - Aaliyah Z Dookhith
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Ana A Aldana
- Department of Instructive Biomaterials Engineering and Department of Complex Tissue Regeneration, MERLN Institute for Technology Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, Maastricht 6229 ET, The Netherlands
| | - Nathaniel A Lynd
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Gabriel E Sanoja
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Matthew B Baker
- Department of Instructive Biomaterials Engineering and Department of Complex Tissue Regeneration, MERLN Institute for Technology Inspired Regenerative Medicine, Maastricht University, Universiteitssingel 40, Maastricht 6229 ET, The Netherlands
| | - Louis M Pitet
- Advanced Functional Polymers (AFP) Laboratory, Institute for Materials Research (imo-imomec), Hasselt University, Martelarenlaan 42, Hasselt 3500, Belgium
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Wiegand C, Dirksen A, Tittelbach J. Treatment with a red-laser-based wound therapy device exerts positive effects in models of delayed keratinocyte and fibroblast wound healing. PHOTODERMATOLOGY, PHOTOIMMUNOLOGY & PHOTOMEDICINE 2024; 40:e12926. [PMID: 37957888 DOI: 10.1111/phpp.12926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 09/21/2023] [Accepted: 10/31/2023] [Indexed: 11/15/2023]
Abstract
BACKGROUND Light therapy is widely used in medicine. Specifically, photobiomodulation has been shown to exert beneficial effects in wound healing disorders, which present a major challenge in health care. The study's aim was providing information on the effect of a novel, red-laser-based wound therapy device (WTD) on keratinocytes and fibroblasts during wound healing under optimal and non-optimal conditions. METHODS The scratch wound assay was employed as a wound healing model for mechanical damage with readjustment of specific cell milieus, explicitly chronic TH1 inflammation and TH2-dominant conditions. Furthermore, gene expression analysis of pro-inflammatory cytokines (IL1A, IL6, CXCL8), growth factors (TGFB1, PDGFC), transcription factors (NFKB1, TP53) and heat shock proteins (HSP90AA1, HSPA1A, HSPD1) as well as desmogleins (DSG1, DSG3) in keratinocytes and collagen (COL1A1, COL3A1) in fibroblasts was performed after WTD treatment. RESULTS It was shown that WTD treatment is biocompatible and supports scratch wound closure under non-optimal conditions. A distinct enhancement of desmoglein and collagen gene expression as well as induction of early growth factor gene expression was observed under chronic inflammatory conditions. Moreover, WTD increased HSPD1 transcript levels in keratinocytes and augmented collagen expression in fibroblasts during wound healing under TH2 conditions. WTD treatment also alleviated the inflammatory response in keratinocytes and induced early growth factor gene expression in fibroblasts under physiological conditions. CONCLUSION Positive effects described for wound treatment with WTD could be replicated in vitro and seem to be to be conferred by a direct influence on cellular processes taking place in keratinocytes and fibroblasts during wound healing.
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Affiliation(s)
- Cornelia Wiegand
- Department of Dermatology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
| | | | - Jörg Tittelbach
- Department of Dermatology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
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3
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Rashid H, Lucas H, Busse K, Kressler J, Mäder K, Trutschel ML. Development of Poly(sorbitol adipate)- g-poly(ethylene glycol) Mono Methyl Ether-Based Hydrogel Matrices for Model Drug Release. Gels 2023; 10:17. [PMID: 38247740 PMCID: PMC10815636 DOI: 10.3390/gels10010017] [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: 12/04/2023] [Revised: 12/19/2023] [Accepted: 12/19/2023] [Indexed: 01/23/2024] Open
Abstract
Hydrogels were prepared by Steglich esterification and by crosslinking pre-synthesized poly(sorbitol adipate)-graft-poly(ethylene glycol) mono methyl ether (PSA-g-mPEG) using different-chain-length-based disuccinyl PEG. PSA and PSA-g-mPEG were investigated for polymer degradation as a function of time at different temperatures. PSA-g-mPEG hydrogels were then evaluated for their most crucial properties of swelling that rendered them suitable for many pharmaceutical and biomedical applications. Hydrogels were also examined for their Sol-Gel content in order to investigate the degree of cross-linking. Physical structural parameters of the hydrogels were theoretically estimated using the modified Flory-Rehner theory to obtain approximate values of polymer volume fraction, the molecular weight between two crosslinks, and the mesh size of the hydrogels. X-ray diffraction was conducted to detect the presence or absence of crystalline regions in the hydrogels. PSA-g-mPEG hydrogels were then extensively examined for higher and lower molecular weight solute release through analysis by fluorescence spectroscopy. Finally, the cytotoxicity of the hydrogels was also investigated using a resazurin reduction assay. Experimental results show that PSA-g-mPEG provides an option as a biocompatible polymer to be used for pharmaceutical applications.
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Affiliation(s)
- Haroon Rashid
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Henrike Lucas
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Karsten Busse
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Jörg Kressler
- Department of Chemistry, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Karsten Mäder
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Marie-Luise Trutschel
- Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
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Arul MR, Alahmadi I, Turro DG, Ruikar A, Abdulmalik S, Williams JT, Sanganahalli BG, Liang BT, Verma R, Kumbar SG. Fluorescent liposomal nanocarriers for targeted drug delivery in ischemic stroke therapy. Biomater Sci 2023; 11:7856-7866. [PMID: 37902365 PMCID: PMC10697427 DOI: 10.1039/d3bm00951c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 10/18/2023] [Indexed: 10/31/2023]
Abstract
Ischemic stroke causes acute CNS injury and long-term disability, with limited treatment options such as surgical clot removal or clot-busting drugs. Neuroprotective therapies are needed to protect vulnerable brain regions. The purinergic receptor P2X4 is activated during stroke and exacerbates post-stroke damage. The chemical compound 5-(3-Bromophenyl)-1,3-dihydro-2H-Benzofuro[3,2-e]-1,4-diazepin-2-one (5BDBD) inhibits P2X4 and has shown neuroprotective effects in rodents. However, it is difficult to formulate for systemic delivery to the CNS. The current manuscript reports for the first time, the synthesis and characterization of 5BDBD PEGylated liposomal formulations and evaluates their feasibility to treat stroke in a preclinical mice model. A PEGylated liposomal formulation of 5BDBD was synthesized and characterized, with encapsulation efficacy of >80%, and release over 48 hours. In vitro and in vivo experiments with Nile red encapsulation showed cytocompatibility and CNS infiltration of nanocarriers. Administered 4 or 28 hours after stroke onset, the nanoformulation provided significant neuroprotection, reducing infarct volume by ∼50% compared to controls. It outperformed orally-administered 5BDBD with a lower dose and shorter treatment duration, suggesting precise delivery by nanoformulation improves outcomes. The fluorescent nanoformulations may serve as a platform for delivering and tracking therapeutic agents for stroke treatment.
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Affiliation(s)
- Michael R Arul
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA.
| | - Ibtihal Alahmadi
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA
| | | | - Aditya Ruikar
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA.
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA
| | - Sama Abdulmalik
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA
| | | | - Basavaraju G Sanganahalli
- Department of Radiology and Biomedical Imaging, Yale University School of Medicine, New Haven, CT, USA
| | - Bruce T Liang
- Calhuan Cardiology Centre, UConn Health, Farmington, CT, USA
| | - Rajkumar Verma
- Department of Neurosciences, UConn Health, Farmington, CT, USA.
| | - Sangamesh G Kumbar
- Department of Orthopaedic Surgery, University of Connecticut Health, Farmington, CT, USA.
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, USA
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, USA
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Nakipoglu M, Tezcaner A, Contag CH, Annabi N, Ashammakhi N. Bioadhesives with Antimicrobial Properties. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2300840. [PMID: 37269168 DOI: 10.1002/adma.202300840] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/10/2023] [Indexed: 06/04/2023]
Abstract
Bioadhesives with antimicrobial properties enable easier and safer treatment of wounds as compared to the traditional methods such as suturing and stapling. Composed of natural or synthetic polymers, these bioadhesives seal wounds and facilitate healing while preventing infections through the activity of locally released antimicrobial drugs, nanocomponents, or inherently antimicrobial polers. Although many different materials and strategies are employed to develop antimicrobial bioadhesives, the design of these biomaterials necessitates a prudent approach as achieving all the required properties including optimal adhesive and cohesive properties, biocompatibility, and antimicrobial activity can be challenging. Designing antimicrobial bioadhesives with tunable physical, chemical, and biological properties will shed light on the path for future advancement of bioadhesives with antimicrobial properties. In this review, the requirements and commonly used strategies for developing bioadhesives with antimicrobial properties are discussed. In particular, different methods for their synthesis and their experimental and clinical applications on a variety of organs are reviewed. Advances in the design of bioadhesives with antimicrobial properties will pave the way for a better management of wounds to increase positive clinical outcomes.
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Affiliation(s)
- Mustafa Nakipoglu
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Engineering Sciences, School of Natural and Applied Sciences, Middle East Technical University, Ankara, 06800, Turkey
- Department of Molecular Biology and Genetics, Faculty of Sciences, Bartin University, Bartin, 74000, Turkey
| | - Ayşen Tezcaner
- Department of Engineering Sciences, School of Natural and Applied Sciences, Middle East Technical University, Ankara, 06800, Turkey
- BIOMATEN, CoE in Biomaterials & Tissue Engineering, Middle East Technical University, Ankara, 06800, Turkey
| | - Christopher H Contag
- Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Department of Biomedical Engineering, College of Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Nureddin Ashammakhi
- Institute for Quantitative Health Science and Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Department of Biomedical Engineering, College of Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
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Trodtfeld F, Tölke T, Wiegand C. Developing a Prolamin-Based Gel for Food Packaging: In-Vitro Assessment of Cytocompatibility. Gels 2023; 9:740. [PMID: 37754421 PMCID: PMC10531018 DOI: 10.3390/gels9090740] [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: 08/17/2023] [Revised: 09/08/2023] [Accepted: 09/10/2023] [Indexed: 09/28/2023] Open
Abstract
Growing environmental concerns drive efforts to reduce packaging waste by adopting biodegradable polymers, coatings, and films. However, biodegradable materials used in packaging face challenges related to barrier properties, mechanical strength, and processing compatibility. A composite gel was developed using biodegradable compounds (prolamin, d-mannose, citric acid), as a coating to increase the oxygen barrier of food packaging materials. To improve gel stability and mechanical properties, the gels were physically cross-linked with particles synthesized from tetraethyl orthosilicate and tetramethyl orthosilicate precursors. Additionally, biocompatibility assessments were performed on human keratinocytes and fibroblasts, demonstrating the safety of the gels for consumer contact. The gel properties were characterized, including molecular structure, morphology, and topography. Biocompatibility of the gels was assessed using bioluminescent ATP assay to detect cell viability, lactate dehydrogenase assay to determine cell cytotoxicity, and a leukocyte stimulation test to detect inflammatory potential. A composite gel with strong oxygen barrier properties in low-humidity environments was prepared. Increasing the silane precursor to 50 wt% during gel preparation slowed degradation in water. The addition of citric acid decreased gel solubility. However, higher precursor amounts increased surface roughness, making the gel more brittle yet mechanically resistant. The increase of precursor in the gel also increased gel viscosity. Importantly, the gels showed no cytotoxicity on human keratinocytes or fibroblasts and had no inflammatory effects on leukocytes. This composite gel holds promise for oxygen barrier food packaging and is safe for consumer contact. Further research should focus on optimizing the stability of the oxygen barrier in humid environments and investigate the potential sensitizing effects of biodegradable materials on consumers.
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Affiliation(s)
- Franziska Trodtfeld
- Department of Dermatology, Jena University Hospital, Friedrich Schiller University Jena, Am Klinikum 1, D-07747 Jena, Germany
- INNOVENT e.V., Prüssingstraße 27 B, D-07745 Jena, Germany;
| | - Tina Tölke
- INNOVENT e.V., Prüssingstraße 27 B, D-07745 Jena, Germany;
| | - Cornelia Wiegand
- Department of Dermatology, Jena University Hospital, Friedrich Schiller University Jena, Am Klinikum 1, D-07747 Jena, Germany
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7
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Serafin A, Culebras M, Collins MN. Synthesis and evaluation of alginate, gelatin, and hyaluronic acid hybrid hydrogels for tissue engineering applications. Int J Biol Macromol 2023; 233:123438. [PMID: 36709805 DOI: 10.1016/j.ijbiomac.2023.123438] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/16/2023] [Accepted: 01/22/2023] [Indexed: 01/27/2023]
Abstract
Tissue engineering (TE) has been proposed extensively as a potential solution to the worldwide shortages of donor organs needed for transplantation. Over the years, numerous hydrogel formulations have been studied for various TE endeavours, including bone, cardiac or neural TE treatment strategies. Amongst the materials used, organic and biocompatible materials which aim to mimic the natural extracellular matrix of the native tissue have been investigated to create biomimicry regenerative environments. As such, the comparison between studies using the same materials is often difficult to accomplish due to varying material concentrations, preparation strategies, and laboratory settings, and as such these variables have a huge impact on the physio-chemical properties of the hydrogel systems. The purpose of the current study is to investigate popular biomaterials such as alginate, hyaluronic acid and gelatin in a variety of concentrations and hydrogel formulations. This aims to provide a clear and comprehensive understanding of their behaviours and provide a rational approach as to the appropriate selection of natural polysaccharides in specific targeted TE strategies.
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Affiliation(s)
- Aleksandra Serafin
- School of Engineering, Bernal Institute, University of Limerick, Limerick, Ireland
| | - Mario Culebras
- Materials Science Institute (ICMUV), Universitat de València, c/ Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain
| | - Maurice N Collins
- School of Engineering, Bernal Institute, University of Limerick, Limerick, Ireland; Health Research Institute and AMBER University of Limerick, Limerick V94 T9PX, Ireland.
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8
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Pulat G, Muganlı Z, Ercan UK, Karaman O. Effect of antimicrobial peptide conjugated surgical sutures on multiple drug-resistant microorganisms. J Biomater Appl 2023; 37:1182-1194. [PMID: 36510770 DOI: 10.1177/08853282221145872] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Surgical site infections are commonly encountered as a risk factor in clinics that increase the morbidity of a patient after a surgical operation. Surgical sutures are one of the leading factor for the formation of surgical site infections that induce bacterial colonization by their broad surface area. Current strategies to overcome with surgical site infections consist utilization of antibiotic agent coatings such as triclosan. However, the significant increase in antibiotic resistance majorly decreases their efficiency against recalcitrant pathogens such as; Pseudomonas aeruginosa and Staphylococcus aureus. Therefore, the development of a multi drug-resistant antimicrobial suture without any cytotoxic effect to combat surgical site infections is vital. Antimicrobial peptides are the first defense line which has a broad range of spectrum against Gram-positive, and Gram-negative bacteria and even viruses. In addition, antimicrobial peptides have a rapid killing mechanism which is enhanced by membrane disruption and inhibition of functional proteins in pathogens without the development of antimicrobial resistance. In the scope of the current study, the antimicrobial effect of antimicrobial peptide conjugated poly (glycolic acid-co-caprolactone) (PGCL) sutures were investigated against P. aeruginosa and methicillin-resistant S. aureus (MRSA) strains by using antimicrobial peptide sequences of KRFRIRVRV-NH2, RWRWRWRW-NH2 and their dual combination (1:1). In addition, in vitro wound scratch assays were performed to evaluate the effect of antimicrobial peptide conjugated sutures on keratinocyte cell lines. Our results indicated that antimicrobial peptide modified sutures could be a potential novel medical device to overcome surgical site infections by the superior acceleration of wound healing.
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Affiliation(s)
- Günnur Pulat
- Tissue Engineering and Regenerative Medicine Laboratory, Department of Biomedical Engineering, 226844İzmir Katip Çelebi University, İzmir, Turkey
| | - Zülal Muganlı
- Tissue Engineering and Regenerative Medicine Laboratory, Department of Biomedical Engineering, 226844İzmir Katip Çelebi University, İzmir, Turkey
| | - Utku Kürşat Ercan
- Plasma Medicine Laboratory, Department of Biomedical Engineering, 226844İzmir Katip Çelebi University, İzmir, Turkey
| | - Ozan Karaman
- Tissue Engineering and Regenerative Medicine Laboratory, Department of Biomedical Engineering, 226844İzmir Katip Çelebi University, İzmir, Turkey
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9
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Politi FAS, Carvalho SG, Rodero CF, Dos Santos KP, Meneguin AB, Sorrechia R, Chiavacci LA, Chorilli M. Piperine-loaded nanoparticles incorporated into hyaluronic acid/sodium alginate-based membranes for the treatment of inflammatory skin diseases. Int J Biol Macromol 2023; 227:736-748. [PMID: 36549615 DOI: 10.1016/j.ijbiomac.2022.12.147] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 12/08/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
Piperine is an alkaloid mostly found in the fruits of several species of the Piper genus, and its anti-inflammatory potential is already known. However, its therapeutic applications still need to be better explored due to the low aqueous solubility of this active. To overcome this drawback, the objective of this work was to evaluate the efficiency of the nanoencapsulation of the compound as well as its incorporation into hyaluronic acid/alginate-based biomembranes. Polymeric nanoparticles composed of Eudragit S100 and Poloxamer 188 were obtained by the nanoprecipitation technique, obtaining spherical nanosized particles with an average diameter of 122.1 ± 2.0 nm, polydispersity index of 0.266, and encapsulation efficiency of 76.2 %. Hyaluronic acid/sodium alginate membranes were then prepared and characterized. Regarding permeation, a slow passage rate was observed until the initial 14 h, when an exponential increase in the recovered drug concentration began to occur. The in vivo assay showed a reduction in inflammation up to 43.6 %, and no cytotoxicity was observed. The results suggested the potential of the system developed for the treatment of inflammatory skin diseases.
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Affiliation(s)
- Flávio Augusto Sanches Politi
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, SP, Brazil
| | - Suzana Gonçalves Carvalho
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, SP, Brazil.
| | - Camila Fernanda Rodero
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, SP, Brazil
| | - Kaio Pini Dos Santos
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, SP, Brazil
| | - Andréia Bagliotti Meneguin
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, SP, Brazil.
| | - Rodrigo Sorrechia
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, SP, Brazil.
| | - Leila Aparecida Chiavacci
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, SP, Brazil
| | - Marlus Chorilli
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, SP, Brazil.
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10
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Costa EM, Oliveira AS, Silva S, Ribeiro AB, Pereira CF, Ferreira C, Casanova F, Pereira JO, Freixo R, Pintado ME, Carvalho AP, Ramos ÓL. Spent Yeast Waste Streams as a Sustainable Source of Bioactive Peptides for Skin Applications. Int J Mol Sci 2023; 24:ijms24032253. [PMID: 36768574 PMCID: PMC9916692 DOI: 10.3390/ijms24032253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/18/2023] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
Spent yeast waste streams are a byproduct obtained from fermentation process and have been shown to be a rich secondary source of bioactive compounds such as phenolic compounds and peptides. The latter are of particular interest for skin care and cosmetics as they have been shown to be safe and hypoallergenic while simultaneously being able to exert various effects upon the epidermis modulating immune response and targeting skin metabolites, such as collagen production. As the potential of spent yeast's peptides has been mainly explored for food-related applications, this work sought to understand if peptide fractions previously extracted from fermentation engineered spent yeast (Saccharomyces cerevisiae) waste streams possess biological potential for skin-related applications. To that end, cytotoxic effects on HaCat and HDFa cells and whether they were capable of exerting a positive effect upon the production of skin metabolites relevant for skin health, such as collagen, hyaluronic acid, fibronectin and elastin, were evaluated. The results showed that the peptide fractions assayed were not cytotoxic up to the highest concentration tested (500 µg/mL) for both cell lines tested. Furthermore, all peptide fractions showed a capacity to modulate the various target metabolites production with an overall positive effect being observed for the four fractions over the six selected targets (pro-collagen IαI, hyaluronic acid, fibronectin, cytokeratin-14, elastin, and aquaporin-9). Concerning the evaluated fractions, the overall best performance (Gpep > 1 kDa) was of an average promotion of 41.25% over the six metabolites and two cell lines assessed at a concentration of 100 µg/mL. These results showed that the peptide fractions assayed in this work have potential for future applications in skin-related products at relatively low concentrations, thus providing an alternative solution for one of the fermentation industry's waste streams and creating a novel and highly valuable bioactive ingredient with encompassing activity to be applied in future skin care formulations.
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Affiliation(s)
- Eduardo M. Costa
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
- Correspondence: (E.M.C.); (Ó.L.R.)
| | - Ana Sofia Oliveira
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Sara Silva
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Alessandra B. Ribeiro
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Carla F. Pereira
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Carlos Ferreira
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
- Amyris Bio Products Portugal Unipessoal Lda, 4169-005 Porto, Portugal
| | - Francisca Casanova
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Joana O. Pereira
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
- Amyris Bio Products Portugal Unipessoal Lda, 4169-005 Porto, Portugal
| | - Ricardo Freixo
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Manuela E. Pintado
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Ana Paula Carvalho
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Óscar L. Ramos
- Escola Superior de Biotecnologia, CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
- Correspondence: (E.M.C.); (Ó.L.R.)
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11
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Characterization and Evaluation of Commercial Carboxymethyl Cellulose Potential as an Active Ingredient for Cosmetics. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12136560] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Carboxymethyl cellulose is the most used water-soluble cellulose with applications in industries such as food, cosmetics, and tissue engineering. However, due to a perceived lack of biological activity, carboxymethyl cellulose is mostly used as a structural element. As such, this work sought to investigate whether CMC possesses relevant biological properties that could grant it added value as a cosmeceutical ingredient in future skincare formulations. To that end, CMC samples (Mw between 471 and 322 kDa) skin cell cytotoxicity, impact upon pro-collagen I α I production, and inflammatory response were evaluated. Results showed that samples were not cytotoxic towards HaCat and HDFa up to 10 mg/mL while simultaneously promoting intracellular production of pro-collagen I α I up by 228% relative to the basal metabolism, which appeared to be related to the highest DS and Mw. Additionally, CMC samples modulated HaCat immune response as they decreased by ca. 1.4-fold IL-8 production and increased IL-6 levels by ca. five fold. Despite this increase, only two samples presented IL-6 levels similar to those of the inflammation control. Considering these results, CMC showed potential to be a more natural alternative to traditional bioactive cosmetic ingredients and, as it is capable of being a bioactive and structural ingredient, it may play a key role in future skincare formulations.
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12
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Chong LH, Ching T, Farm HJ, Grenci G, Chiam KH, Toh YC. Integration of a microfluidic multicellular coculture array with machine learning analysis to predict adverse cutaneous drug reactions. LAB ON A CHIP 2022; 22:1890-1904. [PMID: 35348137 DOI: 10.1039/d1lc01140e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Adverse cutaneous reactions are potentially life-threatening skin side effects caused by drugs administered into the human body. The availability of a human-specific in vitro platform that can prospectively screen drugs and predict this risk is therefore of great importance to drug safety. However, since adverse cutaneous drug reactions are mediated by at least 2 distinct mechanisms, both involving systemic interactions between liver, immune and dermal tissues, existing in vitro skin models have not been able to comprehensively recapitulate these complex, multi-cellular interactions to predict the skin-sensitization potential of drugs. Here, we report a novel in vitro drug screening platform, which comprises a microfluidic multicellular coculture array (MCA) to model different mechanisms-of-action using a collection of simplistic cellular assays. The resultant readouts are then integrated with a machine-learning algorithm to predict the skin sensitizing potential of systemic drugs. The MCA consists of 4 cell culture compartments connected by diffusion microchannels to enable crosstalk between hepatocytes that generate drug metabolites, antigen-presenting cells (APCs) that detect the immunogenicity of the drug metabolites, and keratinocytes and dermal fibroblasts, which collectively determine drug metabolite-induced FasL-mediated apoptosis. A single drug screen using the MCA can simultaneously generate 5 readouts, which are integrated using support vector machine (SVM) and principal component analysis (PCA) to classify and visualize the drugs as skin sensitizers or non-skin sensitizers. The predictive performance of the MCA and SVM classification algorithm is then validated through a pilot screen of 11 drugs labelled by the US Food and Drug Administration (FDA), including 7 skin-sensitizing and 4 non-skin sensitizing drugs, using stratified 4-fold cross-validation (CV) on SVM. The predictive performance of our in vitro model achieves an average of 87.5% accuracy (correct prediction rate), 75% specificity (prediction rate of true negative drugs), and 100% sensitivity (prediction rate of true positive drugs). We then employ the MCA and the SVM training algorithm to prospectively identify the skin-sensitizing likelihood and mechanism-of-action for obeticholic acid (OCA), a farnesoid X receptor (FXR) agonist which has undergone clinical trials for non-alcoholic steatohepatitis (NASH) with well-documented cutaneous side effects.
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Affiliation(s)
- Lor Huai Chong
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, #04-08, Singapore 117583, Singapore
- Bioinformatics Institute, ASTAR, 30 Biopolis St, Singapore 138671, Singapore
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Selangor, 47500, Malaysia
| | - Terry Ching
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, #04-08, Singapore 117583, Singapore
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Singapore
- Digital Manufacturing and Design Centre, Singapore University of Technology and Design, 8 Somapah Rd, Singapore 487372, Singapore
| | - Hui Jia Farm
- Department of Computer Science, University of Oxford, Oxford, OX1 3QD, UK
| | - Gianluca Grenci
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, #04-08, Singapore 117583, Singapore
- Mechanobiology Institute, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Keng-Hwee Chiam
- Bioinformatics Institute, ASTAR, 30 Biopolis St, Singapore 138671, Singapore
| | - Yi-Chin Toh
- Department of Biomedical Engineering, National University of Singapore, 4 Engineering Drive 3, #04-08, Singapore 117583, Singapore
- School of Mechanical Medical & Process Engineering, Queensland University of Technology, 2 George St, Brisbane, QLD 4000, Australia.
- Centre for Biomedical Technologies, Queensland University of Technology, 60 Musk Ave, Kelvin Grove, QLD 4059, Australia
- ARC Training Centre for Cell and Tissue Engineering Technologies, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, QLD 4059, Australia
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13
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Fanizza C, Stefanelli M, Risuglia A, Bruni E, Ietto F, Incoronato F, Marra F, Preziosi A, Mancini P, Sarto MS, Uccelletti D. In Vitro and In Vivo Biocompatibility Studies on Engineered Fabric with Graphene Nanoplatelets. NANOMATERIALS 2022; 12:nano12091405. [PMID: 35564114 PMCID: PMC9100993 DOI: 10.3390/nano12091405] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/08/2022] [Accepted: 04/13/2022] [Indexed: 01/10/2023]
Abstract
To produce clothes made with engineered fabrics to monitor the physiological parameters of workers, strain sensors were produced by depositing two different types of water-based inks (P1 and P2) suitably mixed with graphene nanoplatelets (GNPs) on a fabric. We evaluated the biocompatibility of fabrics with GNPs (GNP fabric) through in vitro and in vivo assays. We investigated the effects induced on human keratinocytes by the eluates extracted from GNP fabrics by the contact of GNP fabrics with cells and by seeding keratinocytes directly onto the GNP fabrics using a cell viability test and morphological analysis. Moreover, we evaluated in vivo possible adverse effects of the GNPs using the model system Caenorhabditis elegans. Cell viability assay, morphological analysis and Caenorhabditis elegans tests performed on smart fabric treated with P2 (P2GNP fabric) did not show significant differences when compared with their respective control samples. Instead, a reduction in cell viability and changes in the membrane microvilli structure were found in cells incubated with smart fabric treated with P1. The results were helpful in determining the non-toxic properties of the P2GNP fabric. In the future, therefore, graphene-based ink integrated into elastic fabric will be developed for piezoresistive sensors.
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Affiliation(s)
- Carla Fanizza
- Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements (DITSIPIA), National Institute for Insurance against Accidents at Work (INAIL), 00143 Rome, Italy; (M.S.); (A.R.); (F.I.); (F.I.)
- Correspondence:
| | - Mara Stefanelli
- Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements (DITSIPIA), National Institute for Insurance against Accidents at Work (INAIL), 00143 Rome, Italy; (M.S.); (A.R.); (F.I.); (F.I.)
| | - Anna Risuglia
- Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements (DITSIPIA), National Institute for Insurance against Accidents at Work (INAIL), 00143 Rome, Italy; (M.S.); (A.R.); (F.I.); (F.I.)
| | - Erika Bruni
- Department of Biology and Biotechnology C. Darwin, Sapienza University of Rome, 00185 Rome, Italy; (E.B.); (A.P.); (D.U.)
| | - Federica Ietto
- Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements (DITSIPIA), National Institute for Insurance against Accidents at Work (INAIL), 00143 Rome, Italy; (M.S.); (A.R.); (F.I.); (F.I.)
| | - Federica Incoronato
- Department of Technological Innovations and Safety of Plants, Products and Anthropic Settlements (DITSIPIA), National Institute for Insurance against Accidents at Work (INAIL), 00143 Rome, Italy; (M.S.); (A.R.); (F.I.); (F.I.)
| | - Fabrizio Marra
- Department of Astronautical, Electrical and Energy Engineering, Sapienza University of Rome, 00184 Rome, Italy; (F.M.); (M.S.S.)
- Research Center for Nanotechnology Applied to Engineering, Sapienza University of Rome, 00184 Rome, Italy
| | - Adele Preziosi
- Department of Biology and Biotechnology C. Darwin, Sapienza University of Rome, 00185 Rome, Italy; (E.B.); (A.P.); (D.U.)
| | - Patrizia Mancini
- Department of Experimental Medicine, Sapienza University of Rome, 00161 Rome, Italy;
| | - Maria Sabrina Sarto
- Department of Astronautical, Electrical and Energy Engineering, Sapienza University of Rome, 00184 Rome, Italy; (F.M.); (M.S.S.)
- Research Center for Nanotechnology Applied to Engineering, Sapienza University of Rome, 00184 Rome, Italy
| | - Daniela Uccelletti
- Department of Biology and Biotechnology C. Darwin, Sapienza University of Rome, 00185 Rome, Italy; (E.B.); (A.P.); (D.U.)
- Research Center for Nanotechnology Applied to Engineering, Sapienza University of Rome, 00184 Rome, Italy
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14
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Morgner B, Husmark J, Arvidsson A, Wiegand C. Effect of a DACC-coated dressing on keratinocytes and fibroblasts in wound healing using an in vitro scratch model. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2022; 33:22. [PMID: 35133505 PMCID: PMC8825393 DOI: 10.1007/s10856-022-06648-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
Wound dressings that exert an antimicrobial effect in order to prevent and treat wound infections can be harmful to the wound healing process. Dressings with hydrophobic coatings, however, have been suggested to both reduce the microbial load and promote the healing process. Therefore, the potential effects of a dialkylcarbamoyl chloride (DACC)-coated dressing on fibroblasts and keratinocytes in wound healing were studied using mechanical scratch wounding of confluent cell layers as an in vitro model. Additionally, gene expression analysis by qRT-PCR was used to elucidate the longitudinal effects of the DACC-coated dressing on cell responses, specifically inflammation, growth factor induction and collagen synthesis. DACC promoted cell viability, did not stick to the cell layers, and supported normal wound healing progression in vitro. In contrast, cells became attached to the uncoated reference material, which inhibited scratch closure. Moreover, DACC slightly induced KGF, VEGF, and GM-CSF expression in HaCaT cells and NHDF. Physiological COL1A1 and COL3A1 gene expression by NHDF was observed under DACC treatment with no observable effect on S100A7 and RNASE7 levels in HaCaT cells. Overall, the DACC coating was found to be safe and may positively influence the wound healing outcome. Graphical abstract.
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Affiliation(s)
- Bianka Morgner
- Department of Dermatology, University Hospital Jena, Jena, Germany
| | | | | | - Cornelia Wiegand
- Department of Dermatology, University Hospital Jena, Jena, Germany.
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15
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Fink S, Burmester A, Hipler U, Neumeister C, Götz MR, Wiegand C. Efficacy of antifungal agents against fungal spores: An in vitro study using microplate laser nephelometry and an artificially infected 3D skin model. Microbiologyopen 2022; 11:e1257. [PMID: 35212482 PMCID: PMC8756736 DOI: 10.1002/mbo3.1257] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 09/09/1999] [Accepted: 12/01/2021] [Indexed: 12/13/2022] Open
Abstract
Dermal fungal infections seem to have increased over recent years. There is further a shift from anthropophilic dermatophytes to a growing prevalence of zoophilic species and the emergence of resistant strains. New antifungals are needed to combat these fungi and their resting spores. This study aimed to investigate the sporicidal effects of sertaconazole nitrate using microplate laser nephelometry against the microconidia of Trichophyton, chlamydospores of Epidermophyton, blastospores of Candida, and conidia of the mold Scopulariopsis brevicaulis. The results obtained were compared with those from ciclopirox olamine and terbinafine. The sporicidal activity was further determined using infected three-dimensional full skin models to determine the antifungal effects in the presence of human cells. Sertaconazole nitrate inhibited the growth of dermatophytes, molds, and yeasts. Ciclopirox olamine also had good antifungal activity, although higher concentrations were needed compared to sertaconazole nitrate. Terbinafine was highly effective against most dermatophytes, but higher concentrations were required to kill the resistant strain Trichophyton indotineae. Sertaconazole nitrate, ciclopirox olamine, and terbinafine had no negative effects on full skin models. Sertaconazole nitrate reduced the growth of fungal and yeast spores over 72 h. Ciclopirox olamine and terbinafine also inhibited the growth of dermatophytes and molds but had significantly lower effects on the yeast. Sertaconazole nitrate might have advantages over the commonly used antifungals ciclopirox olamine and terbinafine in combating resting spores, which persist in the tissues, and thus in the therapy of recurring dermatomycoses.
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Affiliation(s)
- Sarah Fink
- Department of DermatologyUniversity Hospital JenaJenaGermany
| | - Anke Burmester
- Department of DermatologyUniversity Hospital JenaJenaGermany
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16
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Becerril-Rodriguez IC, Claeyssens F. Low methacrylated poly (glycerol sebacate) for soft tissue engineering. Polym Chem 2022. [DOI: 10.1039/d2py00212d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tissue engineering for soft tissue has made great advances in recent years, though there are still challenges to overcome. The main problem is that autologous tissue implants have not given...
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17
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Vater C, Bosch L, Mitter A, Göls T, Seiser S, Heiss E, Elbe-Bürger A, Wirth M, Valenta C, Klang V. Lecithin-based nanoemulsions of traditional herbal wound healing agents and their effect on human skin cells. Eur J Pharm Biopharm 2021; 170:1-9. [PMID: 34798283 DOI: 10.1016/j.ejpb.2021.11.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 11/04/2021] [Accepted: 11/11/2021] [Indexed: 01/11/2023]
Abstract
In previous studies, lecithin-based nanoemulsions (NEs) have been shown to be skin friendly drug carrier systems. Due to their nontoxic properties, NEs might also be suitable as wound healing agents. Hence, different O/W NEs based on lecithin Lipoid® S 75 and plant oils or medium chain triglycerides were produced and characterised. Two lipophilic natural wound healing agents, a betulin-enriched extract from birch bark (BET) and a purified spruce balm (PSB), were successfully incorporated and their effects on primary human skin cells were studied in vitro. MTT, BrdU and scratch assays uncovered the positive influence of the drug-loaded NEs on cell viability, proliferation and potential wound closure. Compared to control formulations, the NEs loaded with either BET or PSB led to higher cell viability rates of fibroblasts and keratinocytes. Higher proliferative activity of keratinocytes and fibroblasts was observed after the treatment, which is a prerequisite for wound closure. Indeed, in scratch assays NEs with PSB and notably BET showed significantly ameliorated wound closure rates than the negative control (unloaded NEs) and the positive control (NEs with dexpanthenol). Our findings suggest that BET and PSB are outstanding wound healing drugs and their incorporation into lecithin-based NEs may represent a valid strategy for wound care.
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Affiliation(s)
- Claudia Vater
- University of Vienna, Department of Pharmaceutical Technology and Biopharmaceutics, Althanstraße 14, 1090 Vienna, Austria; University of Vienna, Research Platform 'Characterisation of Drug Delivery Systems on Skin and Investigation of Involved Mechanisms', Althanstraße 14, 1090 Vienna, Austria
| | - Leonie Bosch
- University of Vienna, Department of Pharmaceutical Technology and Biopharmaceutics, Althanstraße 14, 1090 Vienna, Austria
| | - Alexandra Mitter
- University of Vienna, Department of Pharmaceutical Technology and Biopharmaceutics, Althanstraße 14, 1090 Vienna, Austria
| | - Thomas Göls
- University of Vienna, Department of Pharmacognosy, Althanstrasse 14, 1090 Vienna, Austria
| | - Saskia Seiser
- Medical University of Vienna, Department of Dermatology, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - Elke Heiss
- University of Vienna, Department of Pharmacognosy, Althanstrasse 14, 1090 Vienna, Austria
| | - Adelheid Elbe-Bürger
- Medical University of Vienna, Department of Dermatology, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - Michael Wirth
- University of Vienna, Department of Pharmaceutical Technology and Biopharmaceutics, Althanstraße 14, 1090 Vienna, Austria
| | - Claudia Valenta
- University of Vienna, Department of Pharmaceutical Technology and Biopharmaceutics, Althanstraße 14, 1090 Vienna, Austria; University of Vienna, Research Platform 'Characterisation of Drug Delivery Systems on Skin and Investigation of Involved Mechanisms', Althanstraße 14, 1090 Vienna, Austria
| | - Victoria Klang
- University of Vienna, Department of Pharmaceutical Technology and Biopharmaceutics, Althanstraße 14, 1090 Vienna, Austria.
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18
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Mahant S, Sahajpal NS, Nanda S. Insights into the mechanism of Cymbopogan martinii essential oil in topical therapy of acne vulgaris. Future Microbiol 2021; 16:1181-1193. [PMID: 34615379 DOI: 10.2217/fmb-2021-0039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Aim: The present study investigated the essential oil of Cymbopogan martinii (palmarosa oil; PRO) as a potential topical therapy in acne vulgaris. Materials & methods: GC-MS profiling and biocompatibility studies of PRO were undertaken. The antimicrobial potential was assessed against Cutibacterium acnes. anti-inflammatory, antityrosinase activity and lipid peroxidation were also evaluated. Results: Geraniol was identified as the major phytoconstituent, and the oil was found to be safe for topical application. The minimum inhibitory concentration and minimum bactericidal concentration values were noted as 16 μl/ml. PRO reduced the cytokine levels of TNF-α, IL-12 and IL-8 and inhibited tyrosinase. A low concentration of the oil (up to 0.5 μl/ml) produced malondialdehyde levels equivalent to that of untreated cells. Conclusion: PRO may prove useful as a natural topical agent in the management of acne.
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Affiliation(s)
- Sheefali Mahant
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, 124001, Haryana, India
| | - Nikhil S Sahajpal
- Department of Pathology, Medical College of Georgia, Augusta University, Augusta, GA 30909, USA
| | - Sanju Nanda
- Department of Pharmaceutical Sciences, Maharshi Dayanand University, Rohtak, 124001, Haryana, India
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19
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Serrà A, Limón D, Díaz-Garrido N, Pérez-García L, Gómez E. Assessing the Chemical Stability and Cytotoxicity of Electrodeposited Magnetic Mesoporous Fe-Pt Films for Biomedical Applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:8801-8810. [PMID: 34264678 DOI: 10.1021/acs.langmuir.1c01141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The development of feasible micro/nanoplatforms for various biomedical applications requires holistic research that explores scalable synthesis and design pathways and imposes an interdisciplinary integration of materials science, physical, medical, chemical, and biological knowledge. Thanks to their unique characteristics (i.e., structure, large specific surface areas, tuneability, versatility, and integrity), mesoporous materials have emerged as potential candidates for being part of micro/nanoplatforms for therapeutic, monitoring, and diagnostic applications. In this context, Fe-Pt mesoporous materials are excellent candidates to be part of biomedical micro/nanoplatforms, thanks to their chemical nature, structure, and magnetic properties, which endow them with magnetic locomotion, high cargo capability of therapeutic agents inside the mesoporous cavity, and large surface area for surface functionalization. However, the chemical stability in biological media and cytotoxicity of the Fe-Pt mesoporous material (without considering the effects of architecture and shape) are pivotal elements that determine the suitability of these materials for biomedical applications. This work demonstrates the following: (i) the potential of electrochemical deposition, based on the use of block copolymer micellar solutions as electrochemical media, as an easy, inexpensive, and scalable strategy to synthesize mesoporous Fe-Pt components with tunable chemical composition, porosity, magnetism, and shape (in this case films, but other architectures like nanowires can be easily fabricated using simultaneously hard templates); (ii) the excellent corrosion stability, which is comparable to bulk Au, and minimal chemical dissolution in biological media after 160 h of immersion (∼0.88% of Fe and ∼0.0019% of Pt), which confirms the robustness of Fe-Pt; and (iii) negligible cytotoxicity on HaCaT cells (human immortalized keratinocytes), which reinforces the biocompatibility of Fe-Pt mesoporous structures. Also, the presence of Fe-Pt mesoporous films seems to induce a slight increase in cell viability. These results confirm the biocompatibility of Fe-Pt mesoporous films, making them suitable for biomedical applications.
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Affiliation(s)
- Albert Serrà
- Thin Films and Nanostructures Group, Department of Materials Science and Physical Chemistry, Facultat de Química, Universitat de Barcelona, Martí i Franquès, 1, E-08028 Barcelona, Catalonia, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, E-08028 Barcelona, Catalonia, Spain
| | - David Limón
- Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, E-08028 Barcelona, Catalonia, Spain
- Departament de Farmacologia, Toxicologia i Química Terapèutica, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Avinguda Joan XXIII, 27-31, E-08028 Barcelona, Catalonia, Spain
| | - Natalia Díaz-Garrido
- Departament de Bioquímica i Fisiologia, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Avinguda Joan XXIII, 27-31, E-08028 Barcelona, Catalonia, Spain
| | - Lluïsa Pérez-García
- Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, E-08028 Barcelona, Catalonia, Spain
- Departament de Farmacologia, Toxicologia i Química Terapèutica, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Avinguda Joan XXIII, 27-31, E-08028 Barcelona, Catalonia, Spain
| | - Elvira Gómez
- Thin Films and Nanostructures Group, Department of Materials Science and Physical Chemistry, Facultat de Química, Universitat de Barcelona, Martí i Franquès, 1, E-08028 Barcelona, Catalonia, Spain
- Institute of Nanoscience and Nanotechnology (IN2UB), Universitat de Barcelona, E-08028 Barcelona, Catalonia, Spain
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20
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A bilayer microneedle for therapeutic peptide delivery towards the treatment of diabetes in db/db mice. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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21
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Turkoglu Sasmazel H, Alazzawi M, Kadim Abid Alsahib N. Atmospheric Pressure Plasma Surface Treatment of Polymers and Influence on Cell Cultivation. Molecules 2021; 26:molecules26061665. [PMID: 33802663 PMCID: PMC8002466 DOI: 10.3390/molecules26061665] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 03/04/2021] [Accepted: 03/06/2021] [Indexed: 12/31/2022] Open
Abstract
Atmospheric plasma treatment is an effective and economical surface treatment technique. The main advantage of this technique is that the bulk properties of the material remain unchanged while the surface properties and biocompatibility are enhanced. Polymers are used in many biomedical applications; such as implants, because of their variable bulk properties. On the other hand, their surface properties are inadequate which demands certain surface treatments including atmospheric pressure plasma treatment. In biomedical applications, surface treatment is important to promote good cell adhesion, proliferation, and growth. This article aim is to give an overview of different atmospheric pressure plasma treatments of polymer surface, and their influence on cell-material interaction with different cell lines.
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Affiliation(s)
- Hilal Turkoglu Sasmazel
- Department of Metallurgical and Materials Engineering, Atilim University, Incek, Golbasi, 06830 Ankara, Turkey
- Correspondence: ; Tel.: +90-(312)-586-8844
| | - Marwa Alazzawi
- Department of Biomedical Engineering, Al Nahrain University, Al Jadriya Bridge, Baghdad 64074, Iraq; (M.A.); (N.K.A.A.)
| | - Nabeel Kadim Abid Alsahib
- Department of Biomedical Engineering, Al Nahrain University, Al Jadriya Bridge, Baghdad 64074, Iraq; (M.A.); (N.K.A.A.)
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22
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Tawre MS, Kamble EE, Kumkar SN, Mulani MS, Pardesi KR. Antibiofilm and antipersister activity of acetic acid against extensively drug resistant Pseudomonas aeruginosa PAW1. PLoS One 2021; 16:e0246020. [PMID: 33529248 PMCID: PMC7853517 DOI: 10.1371/journal.pone.0246020] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 01/12/2021] [Indexed: 11/24/2022] Open
Abstract
Pseudomonas aeruginosa is an ESKAPE pathogen associated with difficult-to-treat burn wound and surgical-site infections. This study aimed to characterise an extensively drug resistant (XDR) P. aeruginosa isolate (designated PAW1) and to investigate the antibiofilm and antipersister effect of acetic acid on PAW1. PAW1 was identified using biotypic (VITEK) and genotypic (16S rDNA) analysis. Minimum inhibitory concentration (MIC) and disc susceptibility testing showed high level resistance against all antibiotics from classes including beta lactams, cephems, carbapenems and fluoroquinolones. It was therefore identified as extensively drug resistant (XDR), showing resistance to all antibiotics except for, aminoglycoside (gentamicin and netilmicin) and lipopeptides (polymyxin B). Time kill assays showed antibiotic tolerant, persister cell formation in presence of 100X MICs of gentamicin and polymyxin B. Other virulence traits such as ability to produce lipase, protease, haemolysin, and siderophores and to form biofilms were additional factors which may contribute to its pathogenicity. PAW1 showed promising susceptibility against acetic acid with MIC and minimum biofilm inhibitory concentration of 0.156% (v/v). Percent viability of PAW1 was dependent on dose and treatment time of acetic acid. 0.625% acetic acid treatment of 5 minutes was effective in killing >90% planktonic cells showing lesser toxicity to L929 cells (IC50 = 0.625%). Biofilm disruption caused due to acetic acid was also dose dependent, showing 40.57% disruption after treatment with 0.625% acetic acid for 5 minutes. FESEM imaging and live dead staining of planktonic and biofilm forms of PAW1 confirmed that acetic acid treatment caused 19.04% of cell shrinkage and disruption of extracellular matrix resulting in killing of cells. Antipersister activity of acetic acid was demonstrated by showing complete killing of PAW1 at 4X MIC. Overall, this study characterised an XDR isolate P. aeruginosa showing resistance and tolerance to various antibiotics. Antipersister and antibiofilm effect of acetic acid demonstrates the importance of forgotten topical agents as an effective strategy to treat XDR pathogens.
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Affiliation(s)
- Madhumita S. Tawre
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Ekta E. Kamble
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Shital N. Kumkar
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Mansura S. Mulani
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Karishma R. Pardesi
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India
- * E-mail:
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Cunha CS, Castro PJ, Sousa SC, Pullar RC, Tobaldi DM, Piccirillo C, Pintado MM. Films of chitosan and natural modified hydroxyapatite as effective UV-protecting, biocompatible and antibacterial wound dressings. Int J Biol Macromol 2020; 159:1177-1185. [PMID: 32416293 DOI: 10.1016/j.ijbiomac.2020.05.077] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/30/2020] [Accepted: 05/11/2020] [Indexed: 12/23/2022]
Abstract
Chitosan is a natural polysaccharide widely used in biomedicine, for instance for wound dressing. Hydroxyapatite is a very bioactive calcium phosphate which, if modified with an appropriate element (iron Fe), can also have UV-absorbing properties. In this work, we report the study of films of chitosan incorporated with iron-modified hydroxyapatite of natural origin (from cod fish bones); this combination led to an innovative chitosan-based material with excellent and advanced functional properties. The films showed very high UV absorption (Ultraviolet Protection Factor (UPF) value higher than 50). This is the first time that a chitosan-based material has shown such high UV protection properties. The films also showed to be non-cytotoxic, and possessed antimicrobial activity towards both Gram-positive and negative strains. Their mechanical properties, optimised with an experimental design approach, confirmed their potential use as multifunctional wound dressing, capable of reducing bacterial infections and, at the same time, protecting from UV light.
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Affiliation(s)
- Carla S Cunha
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Porto, Portugal; Department of Chemical Engineering, University of Porto, Porto, Portugal
| | - Pedro J Castro
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Porto, Portugal
| | - Sérgio C Sousa
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Porto, Portugal
| | - Robert C Pullar
- Department of Materials and Ceramic Engineering and CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - David M Tobaldi
- Department of Materials and Ceramic Engineering and CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Clara Piccirillo
- CNR NANOTEC, Institute of Nanotechnology, Campus Ecoteckne, Lecce, Italy.
| | - Maria M Pintado
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Porto, Portugal
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Karl B, Alkhatib Y, Beekmann U, Bellmann T, Blume G, Steiniger F, Thamm J, Werz O, Kralisch D, Fischer D. Development and characterization of bacterial nanocellulose loaded with Boswellia serrata extract containing nanoemulsions as natural dressing for skin diseases. Int J Pharm 2020; 587:119635. [PMID: 32693288 DOI: 10.1016/j.ijpharm.2020.119635] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 07/06/2020] [Accepted: 07/07/2020] [Indexed: 12/20/2022]
Abstract
The combination of the anti-inflammatory lipophilic Boswellia serrata extract with the natural hydropolymer bacterial nanocellulose (BNC) for the treatment of skin diseases is counteracted by their different hydro/lipophilicity. To overcome the hydrophilicity of the BNC, the water in its network was exchanged by single and double nanoemulsions. Incorporation of the Boswellia serrata extract in the nanoemulsions formed particles of about 115 to 150 nm with negative zeta potential and storage stability over 30 days at temperatures between 4 and 32 °C. Their loading into the BNC did not change the preferential characteristics of the nanocellulose like water absorption and retention, softness, and pressure stability in a relevant way. Loaded BNC could be sterilized by an electron-beam procedure. A biphasic drug release profile of lead compounds was observed by Franz cell diffusion test. The biocompatibility of the loaded BNC was confirmed ex ovo by a shell-less hen's egg test. Tape stripping experiments using porcine skin determined a dependency of the drug penetration into skin on the type of nanoemulsion, single vs. repeated applications and the incubation time. In conclusion, the hydrophilicity of BNC could be overcome using nanoemulsions which offers the possibility for the anti-inflammatory skin treatment with Boswellia serrata extract.
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Affiliation(s)
- Berit Karl
- Pharmaceutical Technology and Biopharmacy, Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany.
| | - Yaser Alkhatib
- Pharmaceutical Technology and Biopharmacy, Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany.
| | - Uwe Beekmann
- Pharmaceutical Technology and Biopharmacy, Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany.
| | - Tom Bellmann
- Pharmaceutical Technology and Biopharmacy, Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany.
| | - Gabriele Blume
- Sopharcos Dr. Gabriele Blume, Im Schloss 7, Steinau an der Straße, Germany.
| | - Frank Steiniger
- Electron Microscopy Center, University Hospital Jena, Friedrich Schiller University Jena, Ziegelmuehlenweg 1, 07743 Jena, Germany.
| | - Jana Thamm
- Pharmaceutical Technology and Biopharmacy, Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany.
| | - Oliver Werz
- Pharmaceutical and Medicinal Chemistry, Philosophenweg 14, 07743 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany.
| | - Dana Kralisch
- Pharmaceutical Technology and Biopharmacy, Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany.
| | - Dagmar Fischer
- Pharmaceutical Technology and Biopharmacy, Friedrich Schiller University Jena, Lessingstraße 8, 07743 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany.
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Inhibition of Proinflammatory Enzymes and Attenuation of IL-6 in LPS-Challenged RAW 264.7 Macrophages Substantiates the Ethnomedicinal Use of the Herbal Drug Homalium bhamoense Cubitt & W.W.Sm. Int J Mol Sci 2020; 21:ijms21072421. [PMID: 32244489 PMCID: PMC7178040 DOI: 10.3390/ijms21072421] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/30/2020] [Accepted: 03/31/2020] [Indexed: 12/31/2022] Open
Abstract
Commonly used to treat skin injuries in Asia, several Homalium spp. have been found to promote skin regeneration and wound healing. While ethnobotanical surveys report the use of H. bhamoense trunk bark as a wound salve, there are no studies covering bioactive properties. As impaired cutaneous healing is characterized by excessive inflammation, a series of inflammatory mediators involved in wound healing were targeted with a methanol extract obtained from H. bhamoense trunk bark. Results showed concentration-dependent inhibition of hyaluronidase and 5-lipoxygenase upon exposure to the extract, with IC50 values of 396.9 ± 25.7 and 29.0 ± 2.3 µg mL−1, respectively. H. bhamoense trunk bark extract also exerted anti-inflammatory activity by significantly suppressing the overproduction of interleukin 6 (IL-6) in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages at concentrations ranging from 125 to 1000 µg mL−1, while leading to a biphasic effect on nitric oxide (NO) and tumor necrosis factor alpha (TNF-α) levels. The phenolic profile was elucidated by HPLC-DAD, being characterized by the occurrence of ellagic acid as the main constituent, in addition to a series of methylated derivatives, which might underlie the observed anti-inflammatory effects. Our findings provide in vitro data on anti-inflammatory ability of H. bhamoense trunk bark, disclosing also potential cutaneous toxicity as assessed in HaCaT keratinocytes.
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Rodrigues MC, Rolim WR, Viana MM, Souza TR, Gonçalves F, Tanaka CJ, Bueno-Silva B, Seabra AB. Biogenic synthesis and antimicrobial activity of silica-coated silver nanoparticles for esthetic dental applications. J Dent 2020; 96:103327. [PMID: 32229160 DOI: 10.1016/j.jdent.2020.103327] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 03/19/2020] [Accepted: 03/21/2020] [Indexed: 10/24/2022] Open
Abstract
OBJECTIVES this study aimed to synthesize AgNPs from green tea (GT) extract, forming GT-AgNPs, and to coat their surfaces with silica, resulting in light-colored Ag@SiO2 nanoparticles. MATERIALS AND METHODS particles were characterized and tested for minimal inhibitory concentration (MIC), biofilm formation against Streptococcus mutans and cytotoxicity evaluation on dental pulp fibroblasts. RESULTS X-ray diffraction (XRD) confirmed the formation of pure AgNPs, whereas energy dispersive X-ray spectroscopy (EDS) mapped their elemental atoms. Dynamic light scattering (DLS) demonstrated formation of particles at nanoscale, with moderate polydispersity and negative zeta potential, in agreement with nanoparticle tracking analysis (NTA) size measurements. Fourier-transformed infrared (FTIR) spectroscopy confirmed the successful condensation of silica, which significantly increased surface area by 50%, as assayed by surface area analysis (BET). Thermogravimetric analysis showed a 18%-mass of silica on the surface of Ag@SiO2NPs. Transmission electron microscopy (TEM) displayed the spherical shape of nanoparticles and average size of 11 nm for GT-AgNPs and Ag@SiO2NPs. Ag@SiO2NPs demonstrated potent antimicrobial action against S. mutans, with MIC determined as 600 μg/mL, and inhibition of approximately 44% (p < 0.05) of biofilm formation. At the MIC concentrations, both NPs did not exhibit cytotoxicity. CONCLUSION Ag@SiO2NPs might have a useful application in dental materials. CLINICAL SIGNIFICANCE The possibility of incorporating antimicrobial properties in restorative materials without compromising esthetics makes the AgNPs@SiO2 NPs promising agents against S. mutans biofilm formation, hence the prevention of dental caries. This represents a great step towards the development of more interactive biomaterials in dentistry to overcome clinical problems.
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Affiliation(s)
- Marcela Charantola Rodrigues
- Postgraduate Department of Cruzeiro do Sul University (UNICSUL), Galvão Bueno St., 868, 01506-000, São Paulo, SP, Brazil; Municipal University of São Caetano do Sul (USCS), Santo Antônio St., 50, 09521-160, São Caetano do Sul, SP, Brazil.
| | - Wallace Rosado Rolim
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), dos Estados Ave., 5001, 09210-580, Santo André, SP, Brazil
| | - Marina Mariante Viana
- Postgraduate Department of Cruzeiro do Sul University (UNICSUL), Galvão Bueno St., 868, 01506-000, São Paulo, SP, Brazil
| | - Thaís Rodrigues Souza
- Postgraduate Department of Cruzeiro do Sul University (UNICSUL), Galvão Bueno St., 868, 01506-000, São Paulo, SP, Brazil
| | - Flavia Gonçalves
- Ibirapuera University (UNIB), Interlagos Ave., 1329, 04661-100, São Paulo, SP, Brazil
| | - Caio Junji Tanaka
- Dental Research Division, Guarulhos University, Teresa Cristina Square, 229, 07023-070, Guarulhos, SP, Brazil
| | - Bruno Bueno-Silva
- Dental Research Division, Guarulhos University, Teresa Cristina Square, 229, 07023-070, Guarulhos, SP, Brazil
| | - Amedea Barozzi Seabra
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), dos Estados Ave., 5001, 09210-580, Santo André, SP, Brazil
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Fink S, Reddersen K, Wiegand C, Elsner P, Hipler UC. Evaluation of cell and hemocompatibility of Cucurbiturils. Eur J Pharm Sci 2020; 146:105271. [PMID: 32084586 DOI: 10.1016/j.ejps.2020.105271] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 02/06/2020] [Accepted: 02/16/2020] [Indexed: 01/16/2023]
Abstract
BACKGROUND Cucurbiturils (CB) are pumpkin-shaped macrocyclic molecules consisting of methylen-bridged glycoluril units. Because of their complexing characteristics, they can be used as drug containers for medical purposes. For future biomedical and dermal application of CB, the investigation of cell compatibility is essential. Little is known about the influence of CB on eukaryotic cells, especially on dermal keratinocytes. The structurally related cyclodextrins are known to induce cell death by apoptosis in HaCaT keratinocytes as well as hemolysis in erythrocytes. OBJECTIVE To examine cytotoxic effects of different CB. METHODS Different cytotoxicity tests were performed on HaCaT keratinocytes and erythrocytes incubated with CB[5], CB[6], and CB[7]. RESULTS CB[5] and CB[6] did not lead to cytotoxic reactions at high concentrations up to 30 mg/mL whereas incubation with CB[7] triggered apoptosis at a concentration of 3.75 mg/mL. None of the investigated CB caused hemolytic effects on erythrocytes. CONCLUSION These results confirm the high potential of CB as host-complexes for biomedical and dermal applications.
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Affiliation(s)
- Sarah Fink
- Department of Dermatology, Jena University Hospital, Jena, Germany.
| | | | - Cornelia Wiegand
- Department of Dermatology, Jena University Hospital, Jena, Germany
| | - Peter Elsner
- Department of Dermatology, Jena University Hospital, Jena, Germany
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Yalcintas EP, Ackerman DS, Korkmaz E, Telmer CA, Jarvik JW, Campbell PG, Bruchez MP, Ozdoganlar OB. Analysis of In Vitro Cytotoxicity of Carbohydrate-Based Materials Used for Dissolvable Microneedle Arrays. Pharm Res 2020; 37:33. [DOI: 10.1007/s11095-019-2748-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 12/05/2019] [Indexed: 11/29/2022]
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29
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Formica M, Ullio Gamboa G, Tártara L, Luna J, Benoit J, Palma S. Triamcinolone acetonide-loaded lipid nanocapsules for ophthalmic applications. Int J Pharm 2020; 573:118795. [DOI: 10.1016/j.ijpharm.2019.118795] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 10/09/2019] [Accepted: 10/12/2019] [Indexed: 12/17/2022]
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Flavonoid Composition of Salacia senegalensis (Lam.) DC. Leaves, Evaluation of Antidermatophytic Effects, and Potential Amelioration of the Associated Inflammatory Response. Molecules 2019; 24:molecules24142530. [PMID: 31295972 PMCID: PMC6680804 DOI: 10.3390/molecules24142530] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/05/2019] [Accepted: 07/09/2019] [Indexed: 01/28/2023] Open
Abstract
Predominantly spread in West Tropical Africa, the shrub Salacia senegalensis (Lam.) DC. is known because of its medicinal properties, the leaves being used in the treatment of skin diseases. Prompted by the ethnomedicinal use, a hydroethanolic extract obtained from the leaves of the plant was screened against a panel of microbial strains, the majority of which involved in superficial infections. The extract was found to be active against the dermatophytes Trichophyton rubrum and Epidermophyton floccosum. Notable results were also recorded regarding the attenuation of the inflammatory response, namely the inhibitory effects observed against soybean 5-lipoxygenase (IC50 = 71.14 μg mL-1), no interference being recorded in the cellular viability of RAW 264.7 macrophages and NO levels. Relevantly, the extract did not lead to detrimental effects against the keratinocyte cell line HaCaT, at concentrations displaying antidermatophytic and anti-inflammatory effects. Flavonoid profiling of S. senegalensis leaves was achieved for the first time, allowing the identification and quantitation of myricitrin, three 3-O-substituted quercetin derivatives, and three other flavonoid derivatives, which may contribute, at least partially, to the observed antidermatophytic and anti-inflammatory effects. In the current study, the plant S. senegalensis is assessed concerning its antidermatophytic and anti-inflammatory properties.
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31
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Cytotoxicity of lecithin-based nanoemulsions on human skin cells and ex vivo skin permeation: Comparison to conventional surfactant types. Int J Pharm 2019; 566:383-390. [DOI: 10.1016/j.ijpharm.2019.05.078] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 05/29/2019] [Accepted: 05/30/2019] [Indexed: 01/16/2023]
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Effect of non-adhering dressings on promotion of fibroblast proliferation and wound healing in vitro. Sci Rep 2019; 9:4320. [PMID: 30867534 PMCID: PMC6416289 DOI: 10.1038/s41598-019-40921-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 02/21/2019] [Indexed: 12/15/2022] Open
Abstract
Non-adhering dressings are commonly used during granulation, tissue formation, and re-epithelialization. Elucidating cytotoxic effects and influence on proliferation/migration capacity of cells like fibroblasts is of interest. Dressings’ effects were investigated by comprehensive in vitro approach: (1) MTT assay measuring cell viability after direct contact, (2) ATP assay determining effects on cell proliferation, and (3) scratch wound assay featuring an in vitro wound healing model. One cotton-based dressing with vaseline (vas) was included in the study and four polyester dressings containing vas and technology-lipido-colloid matrix (TLC), carboxymethylcellulose (CMC), hydrocolloid (HC), or glycerin (gly) as additives. A polyamide dressing with vas + CMC and three silicone-based dressings (AT, CC, M) were tested. Polyester + vas + CMC did not negatively affect cell viability or proliferation but it was found that fibroblast layers appeared more irregular with decreased F-actin network structure and tubulin density possibly leading to hampered scratch closure. Silicone AT, polyester + gly and polyamide + vas + CMC caused distinct cell damage. The latter two further reduced cell viability, proliferation and scratch healing. From the overall results, it can be concluded that cotton + vas, polyester + TLC, polyester + vas + HC and the silicone dressings CC and M have the potential to prevent damage of newly formed tissue during dressing changes and positively influence wound healing.
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Schossleitner K, O'Mahony C, Brandstätter S, Haslinger MJ, Demuth S, Fechtig D, Petzelbauer P. Differences in biocompatibility of microneedles from cyclic olefin polymers with human endothelial and epithelial skin cells. J Biomed Mater Res A 2018; 107:505-512. [PMID: 30456923 PMCID: PMC6587957 DOI: 10.1002/jbm.a.36565] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 09/20/2018] [Accepted: 09/28/2018] [Indexed: 01/05/2023]
Abstract
Microneedles are promising devices for transdermal delivery and diagnostic applications, due to their minimally invasive and painless nature of application. However, so far, applications are limited to small scale research projects. Material selection and production for larger projects remain a challenge. In vitro testing using human cell culture could bridge the gap between cost effective screening of suitable materials and concerns for safety and ethics. In this study, materials were tested for effects on viability and morphology of human endothelial cells and keratinocytes. In addition, materials were assessed for their potential to influence cellular differentiation and barrier formation. Elution‐based testing of inflammatory markers revealed no negative effects in all applied tests, whereas the assessment of differentiation markers on cells in direct contact with the material showed differences and allowed the selection of candidate materials for future medical device applications. This study illustrates that elution‐based biocompatibility testing can paint an incomplete picture. Advanced staining techniques and cell types specific for the application of the medical device improve material selection to reduce and replace animal testing at an early stage in the development process. © 2018 The Authors. journal Of Biomedical Materials Research Part A Published By Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 505–512, 2019.
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Affiliation(s)
- Klaudia Schossleitner
- Skin and Endothelium Research Division, Department of Dermatology, Medical University Vienna, Vienna, Austria
| | - Conor O'Mahony
- Tyndall National Institute, University College Cork, Cork, T12 R5CP, Ireland
| | | | - Michael J Haslinger
- Functional Surfaces and Nanostructures, Profactor GmbH, Steyr-Gleink, Austria
| | - Sabrina Demuth
- Skin and Endothelium Research Division, Department of Dermatology, Medical University Vienna, Vienna, Austria
| | - Daniel Fechtig
- Functional Surfaces and Nanostructures, Profactor GmbH, Steyr-Gleink, Austria
| | - Peter Petzelbauer
- Skin and Endothelium Research Division, Department of Dermatology, Medical University Vienna, Vienna, Austria
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Ricciardelli A, Casillo A, Papa R, Monti DM, Imbimbo P, Vrenna G, Artini M, Selan L, Corsaro MM, Tutino ML, Parrilli E. Pentadecanal inspired molecules as new anti-biofilm agents against Staphylococcus epidermidis. BIOFOULING 2018; 34:1110-1120. [PMID: 30698031 DOI: 10.1080/08927014.2018.1544246] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 10/30/2018] [Accepted: 10/30/2018] [Indexed: 06/09/2023]
Abstract
Staphylococcus epidermidis, a harmless human skin colonizer, is a significant nosocomial pathogen in predisposed hosts because of its capability to form a biofilm on indwelling medical devices. In a recent paper, the purification and identification of the pentadecanal produced by the Antarctic bacterium Pseudoalteromonas haloplanktis TAC125, able to impair S. epidermidis biofilm formation, were reported. Here the authors report on the chemical synthesis of pentadecanal derivatives, their anti-biofilm activity on S. epidermidis, and their action in combination with antibiotics. The results clearly indicate that the pentadecanal derivatives were able to prevent, to a different extent, biofilm formation and that pentadecanoic acid positively modulated the antimicrobial activity of the vancomycin. The cytotoxicity of these new anti-biofilm molecules was tested on two different immortalized eukaryotic cell lines in view of their potential applications.
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Affiliation(s)
| | - Angela Casillo
- a Chemical Sciences , University of Naples "Federico II" , Naples , Italy
| | - Rosanna Papa
- b Department of Public Health and Infectious Diseases , Sapienza University , Rome , Italy
| | - Daria Maria Monti
- a Chemical Sciences , University of Naples "Federico II" , Naples , Italy
| | - Paola Imbimbo
- a Chemical Sciences , University of Naples "Federico II" , Naples , Italy
| | - Gianluca Vrenna
- b Department of Public Health and Infectious Diseases , Sapienza University , Rome , Italy
| | - Marco Artini
- b Department of Public Health and Infectious Diseases , Sapienza University , Rome , Italy
| | - Laura Selan
- b Department of Public Health and Infectious Diseases , Sapienza University , Rome , Italy
| | | | - Maria Luisa Tutino
- a Chemical Sciences , University of Naples "Federico II" , Naples , Italy
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Huerta-Ángeles G, Nešporová K, Ambrožová G, Kubala L, Velebný V. An Effective Translation: The Development of Hyaluronan-Based Medical Products From the Physicochemical, and Preclinical Aspects. Front Bioeng Biotechnol 2018; 6:62. [PMID: 29868577 PMCID: PMC5966713 DOI: 10.3389/fbioe.2018.00062] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 04/27/2018] [Indexed: 12/18/2022] Open
Abstract
This review shows the steps toward material selection focalized on the design and development of medical devices based on hyaluronan (HA). The selection is based on chemical and mechanical properties, biocompatibility, sterilization, safety, and scale-up costs. These facts play a vital role in the industrialization process. Approved medical devices containing-HA are illustrated to identify key parameters. The first part of this work involves the steps toward a complete characterization of chemical and mechanical aspects, reproducibility of the processes and scale up. In a second stage, we aimed to describe the preclinical in vitro and in vivo assays and selected examples of clinical trials. Furthermore, it is important to keep in mind the regulatory affairs during the research and development (R&D) using standardization (ISO standards) to achieve the main goal, which is the functionality and safety of the final device. To keep reproducible experimental data to prepare an efficient master file for the device, based on quality and recorded manufacturing data, and a rigorous R&D process may help toward clinical translation. A strong debate is still going on because the denominated basic research in HA field does not pay attention to the purity and quality of the raw materials used during the development. So that, to achieve the next generation of devices is needed to overcome the limitations of state of art in terms of efficacy, biodegradability, and non-toxicity.
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Affiliation(s)
| | - Kristina Nešporová
- Department of Research and Development, Contipro a.s., Dolní Dobrouč, Czechia
| | - Gabriela Ambrožová
- Free Radical Pathophysiology, Institute of Biophysics of the Czech Academy of Sciences, Brno, Czechia
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia
| | - Lukas Kubala
- Free Radical Pathophysiology, Institute of Biophysics of the Czech Academy of Sciences, Brno, Czechia
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia
| | - Vladimir Velebný
- Department of Research and Development, Contipro a.s., Dolní Dobrouč, Czechia
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Memic A, Navaei A, Mirani B, Cordova JAV, Aldhahri M, Dolatshahi-Pirouz A, Akbari M, Nikkhah M. Bioprinting technologies for disease modeling. Biotechnol Lett 2017; 39:1279-1290. [PMID: 28550360 DOI: 10.1007/s10529-017-2360-z] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 05/04/2017] [Indexed: 12/12/2022]
Abstract
There is a great need for the development of biomimetic human tissue models that allow elucidation of the pathophysiological conditions involved in disease initiation and progression. Conventional two-dimensional (2D) in vitro assays and animal models have been unable to fully recapitulate the critical characteristics of human physiology. Alternatively, three-dimensional (3D) tissue models are often developed in a low-throughput manner and lack crucial native-like architecture. The recent emergence of bioprinting technologies has enabled creating 3D tissue models that address the critical challenges of conventional in vitro assays through the development of custom bioinks and patient derived cells coupled with well-defined arrangements of biomaterials. Here, we provide an overview on the technological aspects of 3D bioprinting technique and discuss how the development of bioprinted tissue models have propelled our understanding of diseases' characteristics (i.e. initiation and progression). The future perspectives on the use of bioprinted 3D tissue models for drug discovery application are also highlighted.
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Affiliation(s)
- Adnan Memic
- Center of Nanotechnology, King Abdulaziz University, Jeddah, Saudi Arabia.,Biomaterials Research Innovation Center, Harvard Medical School, Brigham and Women's Hospital, Cambridge, MA, USA
| | - Ali Navaei
- School of Biological and Health Systems Engineering (SBHSE), Arizona State University, Tempe, AZ, USA
| | - Bahram Mirani
- Center for Biomedical Research, University of Victoria, Victoria, Canada.,Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, Canada
| | | | - Musab Aldhahri
- Center of Nanotechnology, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Alireza Dolatshahi-Pirouz
- Center for Nanomedicine and Theranostics, Technical University of Denmark, DTU Nanotech, 2800, Lyngby, Denmark
| | - Mohsen Akbari
- Center for Biomedical Research, University of Victoria, Victoria, Canada.,Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, Canada
| | - Mehdi Nikkhah
- School of Biological and Health Systems Engineering (SBHSE), Arizona State University, Tempe, AZ, USA.
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Eberlein T, Wiegand C, Brill FHH. According to the Article "Cytokine Expression in Human Osteoblasts After Antiseptic Treatment: A Comparative Study between Polyhexanide and Chlorhexidine" by Röhner E. et al., Journal of Investigative Surgery, 28, 1-7, 2015. J INVEST SURG 2016; 30:66-67. [PMID: 27905817 DOI: 10.1080/08941939.2016.1254307] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Thomas Eberlein
- a College of Medicine and Medical Science, Arabian Gulf University Manama , Kingdom of Bahrain
| | - Cornelia Wiegand
- b Labor für In-vitro-Forschung und Routinediagnostik, KlinikfürHautkrankheiten, Universitätsklinikum Jena , Jena , Germany
| | - Florian H H Brill
- c Institut für Hygiene und Mikrobiologie Dr. Brill + Partner GmbH , Hamburg , Germany
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Reddersen K, Finger S, Zieger M, Wiegand C, Buschmann HJ, Elsner P, Hipler UC. Cytocompatibility testing of cyclodextrin-functionalized antimicrobial textiles-a comprehensive approach. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:190. [PMID: 27844305 DOI: 10.1007/s10856-016-5804-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 10/27/2016] [Indexed: 06/06/2023]
Abstract
Functionalized textiles can be used in wound management to reduce the microbial burden in the wound area, to prevent wound infections, and to avoid cross-contamination between patients. In the present study, a comprehensive in vitro approach to enable the assessment of antibacterial activity of functionalized textiles and cytotoxicity of cyclodextrin (CD)-complexes with chlorhexidine diacetate (CHX), iodine (IOD), and polihexanide (PHMB) is suggested to evaluate their properties for supporting optimal conditions for wound healing. For all β-CD-antiseptic functionalized cotton samples a strong antibacterial effect on the Gram-positive bacteria Staphylococcus aureus and Staphylococcus epidermidis as well as on the Gram-negative bacteria Klebsiella pneumoniae and Escherichia coli was proven. In addition, β-CD-CHX and β-CD-PHMB were effective against the yeast Candida albicans. The growth of Pseudomonas aeruginosa could be reduced significantly by β-CD-IOD and β-CD-PHMB. The established comprehensive testing system for determination of biocompatibility on human HaCaT keratinocytes is suitable for obtaining robust data on cell viability, cytotoxicity and mode of cell death of the β-CD-antiseptic-complexes. The promising results of the high antimicrobial activity of these functionalized textiles show the high potential of such materials in medical applications.
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Affiliation(s)
| | - Susanne Finger
- Department of Dermatology, University Hospital Jena, Jena, Germany
| | - Michael Zieger
- Department of Dermatology, University Hospital Jena, Jena, Germany
| | - Cornelia Wiegand
- Department of Dermatology, University Hospital Jena, Jena, Germany
| | | | - Peter Elsner
- Department of Dermatology, University Hospital Jena, Jena, Germany
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A large-conductance calcium-regulated K+ channel in human dermal fibroblast mitochondria. Biochem J 2016; 473:4457-4471. [PMID: 27729542 DOI: 10.1042/bcj20160732] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 09/23/2016] [Accepted: 10/10/2016] [Indexed: 02/06/2023]
Abstract
Potassium channels have been found in the inner mitochondrial membrane of various cells. These channels regulate the mitochondrial membrane potential, respiration and production of reactive oxygen species. In the present study, we identified the activity of a mitochondrial large-conductance Ca2+-regulated potassium channel (mitoBKCa channel) in mitoplasts isolated from a primary human dermal fibroblast cell line. A potassium selective current was recorded with a mean conductance of 280 ± 2 pS in a symmetrical 150 mM KCl solution. The mitoBKCa channel was activated by the Ca2+ and by potassium channel opener NS1619. The channel activity was irreversibly inhibited by paxilline, a selective inhibitor of the BKCa channels. In isolated fibroblast mitochondria NS1619 depolarized the mitochondrial membrane potential, stimulated nonphosphorylating respiration and decreased superoxide formation. Additionally, the α- and β-subunits (predominantly the β3-form) of the BKCa channels were identified in fibroblast mitochondria. Our findings indicate, for the first time, the presence of a large-conductance Ca2+-regulated potassium channel in the inner mitochondrial membrane of human dermal fibroblasts.
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Ganske K, Wiegand C, Hipler UC, Heinze T. Synthesis of Novel Cellulose Carbamates Possessing Terminal Amino Groups and Their Bioactivity. Macromol Biosci 2015; 16:451-61. [DOI: 10.1002/mabi.201500324] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 10/13/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Kristin Ganske
- Center of Excellence for Polysaccharide Research; Institute of Organic; Chemistry and Macromolecular Chemistry; Friedrich Schiller University of Jena; Humboldtstraße 10; 07743 Jena Germany
| | - Cornelia Wiegand
- Department of Dermatology; University Hospital Center Jena; Erfurter Str. 35 07743 Jena Germany
| | - Uta-Christina Hipler
- Department of Dermatology; University Hospital Center Jena; Erfurter Str. 35 07743 Jena Germany
| | - Thomas Heinze
- Center of Excellence for Polysaccharide Research; Institute of Organic; Chemistry and Macromolecular Chemistry; Friedrich Schiller University of Jena; Humboldtstraße 10; 07743 Jena Germany
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Wiegand C, Moritz S, Hessler N, Kralisch D, Wesarg F, Müller FA, Fischer D, Hipler UC. Antimicrobial functionalization of bacterial nanocellulose by loading with polihexanide and povidone-iodine. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:245. [PMID: 26411441 DOI: 10.1007/s10856-015-5571-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 09/16/2015] [Indexed: 05/18/2023]
Abstract
Bacterial nanocellulose (BNC) is chemically identical with plant cellulose but free of byproducts like lignin, pectin, and hemicelluloses, featuring a unique reticulate network of fine fibers. BNC sheets are mostly obtained by static cultivation. Now, a Horizontal Lift Reactor may provide a cost efficient method for mass production. This is of particular interest as BNC features several properties of an ideal wound dressing although it exhibits no bactericidal activity. Therefore, BNC was functionalized with the antiseptics povidone-iodine (PI) and polihexanide (PHMB). Drug loading and release, mechanical characteristics, biocompatibility, and antimicrobial efficacy were investigated. Antiseptics release was based on diffusion and swelling according to Ritger-Peppas equation. PI-loaded BNC demonstrated a delayed release compared to PHMB due to a high molar drug mass and structural changes induced by PI insertion into BNC that also increased the compressive strength of BNC samples. Biological assays demonstrated high biocompatibility of PI-loaded BNC in human keratinocytes but a distinctly lower antimicrobial activity against Staphylococcus aureus compared to PHMB-loaded BNC. Overall, BNC loaded with PHMB demonstrated a better therapeutic window. Moreover, compressive and tensile strength were not changed by incorporation of PHMB into BNC, and solidity during loading and release could be confirmed.
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Affiliation(s)
- Cornelia Wiegand
- Department of Dermatology, University Hospital Center Jena, Erfurter Str. 35, 07740, Jena, Germany.
| | - Sebastian Moritz
- Department of Pharmaceutical Technology, Friedrich-Schiller-University Jena, Jena, Germany
| | - Nadine Hessler
- Department of Pharmaceutical Technology, Friedrich-Schiller-University Jena, Jena, Germany
| | - Dana Kralisch
- Department of Pharmaceutical Technology, Friedrich-Schiller-University Jena, Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich-Schiller-University Jena, Jena, Germany
| | - Falko Wesarg
- Institute of Materials Science and Technology, Friedrich-Schiller-University Jena, Jena, Germany
| | - Frank A Müller
- Institute of Materials Science and Technology, Friedrich-Schiller-University Jena, Jena, Germany
| | - Dagmar Fischer
- Department of Pharmaceutical Technology, Friedrich-Schiller-University Jena, Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich-Schiller-University Jena, Jena, Germany
| | - Uta-Christina Hipler
- Department of Dermatology, University Hospital Center Jena, Erfurter Str. 35, 07740, Jena, Germany
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Wiegand C, Nikolajski M, Hipler UC, Heinze T. Nanoparticle Formulation of AEA and BAEA Cellulose Carbamates Increases Biocompatibility and Antimicrobial Activity. Macromol Biosci 2015; 15:1242-51. [DOI: 10.1002/mabi.201500031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 04/28/2015] [Indexed: 01/22/2023]
Affiliation(s)
- Cornelia Wiegand
- Department of Dermatology; University Hospital Jena; Erfurter Str. 35 D-07743 Jena Germany
| | - Melanie Nikolajski
- Center of Excellence for Polysaccharide Research, Institute of Organic Chemistry and Macromolecular Chemistry; Friedrich-Schiller-University Jena; Humboldtstr. 10 D-07743 Jena Germany
| | - Uta-Christina Hipler
- Department of Dermatology; University Hospital Jena; Erfurter Str. 35 D-07743 Jena Germany
| | - Thomas Heinze
- Center of Excellence for Polysaccharide Research, Institute of Organic Chemistry and Macromolecular Chemistry; Friedrich-Schiller-University Jena; Humboldtstr. 10 D-07743 Jena Germany
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Wiegand C, Abel M, Ruth P, Elsner P, Hipler UC. In vitro assessment of the antimicrobial activity of wound dressings: influence of the test method selected and impact of the pH. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:5343. [PMID: 25578697 PMCID: PMC4325976 DOI: 10.1007/s10856-014-5343-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 08/03/2014] [Indexed: 05/30/2023]
Abstract
Antibacterial activity of dressings containing antimicrobials is mostly evaluated using in vitro tests. However, the various methods available differ significantly in their properties and results obtained are influenced by the method selected, micro-organisms used, and extraction method, the degree of solubility or the diffusability of the test-compounds. Here, results on antimicrobial activity of silver-containing dressings obtained by agar diffusion test (ADT), challenge tests (JIS L 1902, AATCC 100), and extraction-based methods (microplate laser nephelometry (MLN), luminescent quantification of bacterial ATP (LQbATP)) using Staphylococcus aureus and Pseudomonas aeruginosa were evaluated. Furthermore, the effect of the pH on antibacterial efficacy of these dressings was investigated. All silver-containing dressings exerted antimicrobial activity in all in vitro tests and results correlated considerably well. Differences were observed testing the agent-free basic materials. They did not exhibit any antimicrobial effects in the ADT, MLN or LQbATP, since these methods depend on diffusion/extraction of an active agent. However, they showed a strong antimicrobial effect in the challenge tests as they possess a high absorptive capacity, and are able to bind and sequester micro-organisms present. Therefore, it seems recommendable to choose several tests to distinguish whether a material conveys an active effect or a passive mechanism. In addition, it could be shown that release of silver and its antimicrobial efficacy is partially pH-dependent, and that dressings themselves affect the pH. It can further be speculated that dressings' effects on pH and release of silver ions act synergistically for antimicrobial efficacy.
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Affiliation(s)
- Cornelia Wiegand
- Department of Dermatology, University Hospital Center Jena, Erfurter Str. 35, 07740, Jena, Germany,
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Wiegand C, Bauer M, Hipler UC, Fischer D. Poly(ethyleneimines) in dermal applications: biocompatibility and antimicrobial effects. Int J Pharm 2013; 456:165-74. [PMID: 23948135 DOI: 10.1016/j.ijpharm.2013.08.001] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 07/26/2013] [Accepted: 08/01/2013] [Indexed: 01/28/2023]
Abstract
Cationic polyamines, such as poly(ethyleneimines) (PEIs), may recommend themselves for antimicrobial applications as they can interact with microbial membranes resulting in their disruption. The purpose of the study was the assessment of biocompatibility and antibacterial activity of PEIs with different architectures (branched (b) and linear (l)) and molar masses (0.8-750 kDa). lPEI and bPEI exhibited a strong antibacterial activity against Staphylococcus aureus and Escherichia coli with a more pronounced effect on the Gram-positive bacteria. lPEIs further demonstrated a higher antibacterial efficacy compared to bPEIs but no significant differences between 5 and 25 kDa were observed. In accordance, antibacterial activity of bPEI did not specifically depend on molar mass. Only slightly lower minimal inhibitory concentrations (MIC) were observed at 5 kDa (S. aureus) and 25 kDa (E. coli) in the tests. As PEIs are compelling candidates for use in antimicrobial treatment, two basic aspects have to be investigated: treatment effectiveness and safety. PEIs clearly induced molecular weight dependent cytotoxic effects in vitro. PEIs with low molecular weight (0.8 and 5 kDa) exhibited higher biocompatibility. Nonetheless, the results confirmed a low genotoxic potential of lPEI and bPEIs. In conclusion, 2.5 kDa-lPEI and 0.8 kDa-bPEI can be recommended for use as antimicrobial polymers in dermal applications due to their high biocompatibility with concomitant antibacterial efficacy.
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Affiliation(s)
- Cornelia Wiegand
- Department of Dermatology, University Medical Center Jena, Erfurter Str. 35, D-07740 Jena, Germany.
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45
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Feng B, Ma LJ, Yao JJ, Fang Y, Mei YA, Wei SM. Protective effect of oat bran extracts on human dermal fibroblast injury induced by hydrogen peroxide. J Zhejiang Univ Sci B 2013; 14:97-105. [PMID: 23365008 DOI: 10.1631/jzus.b1200159] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Oat contains different components that possess antioxidant properties; no study to date has addressed the antioxidant effect of the extract of oat bran on the cellular level. Therefore, the present study focuses on the investigation of the protective effect of oat bran extract by enzymatic hydrolysates on human dermal fibroblast injury induced by hydrogen peroxide (H(2)O(2)). Kjeldahl determination, phenol-sulfuric acid method, and high-performance liquid chromatography (HPLC) analysis indicated that the enzymatic products of oat bran contain a protein amount of 71.93%, of which 97.43% are peptides with a molecular range from 438.56 to 1301.01 Da. Assays for 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity indicate that oat peptide-rich extract has a direct and concentration-dependent antioxidant activity. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) colorimetric assay and the TdT-mediated digoxigenin-dUTP nick-end labeling (TUNEL) assay for apoptosis showed that administration of H(2)O(2) in human dermal fibroblasts caused cell damage and apoptosis. Pre-incubation of human dermal fibroblasts with the Oatp for 24 h markedly inhibited human dermal fibroblast injury induced by H(2)O(2), but application oat peptides with H(2)O(2) at same time did not. Pre-treatment of human dermal fibroblasts with Oatp significantly reversed the H(2)O(2)-induced decrease of superoxide dismutase (SOD) and the inhibition of malondialdehyde (MDA). The results demonstrate that oat peptides possess antioxidant activity and are effective against H(2)O(2)-induced human dermal fibroblast injury by the enhanced activity of SOD and decrease in MDA level. Our results suggest that oat bran will have the potential to be further explored as an antioxidant functional food in the prevention of aging-related skin injury.
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Affiliation(s)
- Bing Feng
- School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China
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van Eijl S, Zhu Z, Cupitt J, Gierula M, Götz C, Fritsche E, Edwards RJ. Elucidation of xenobiotic metabolism pathways in human skin and human skin models by proteomic profiling. PLoS One 2012; 7:e41721. [PMID: 22848577 PMCID: PMC3406074 DOI: 10.1371/journal.pone.0041721] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2012] [Accepted: 06/25/2012] [Indexed: 12/01/2022] Open
Abstract
Background Human skin has the capacity to metabolise foreign chemicals (xenobiotics), but knowledge of the various enzymes involved is incomplete. A broad-based unbiased proteomics approach was used to describe the profile of xenobiotic metabolising enzymes present in human skin and hence indicate principal routes of metabolism of xenobiotic compounds. Several in vitro models of human skin have been developed for the purpose of safety assessment of chemicals. The suitability of these epidermal models for studies involving biotransformation was assessed by comparing their profiles of xenobiotic metabolising enzymes with those of human skin. Methodology/Principal Findings Label-free proteomic analysis of whole human skin (10 donors) was applied and analysed using custom-built PROTSIFT software. The results showed the presence of enzymes with a capacity for the metabolism of alcohols through dehydrogenation, aldehydes through dehydrogenation and oxidation, amines through oxidation, carbonyls through reduction, epoxides and carboxylesters through hydrolysis and, of many compounds, by conjugation to glutathione. Whereas protein levels of these enzymes in skin were mostly just 4–10 fold lower than those in liver and sufficient to support metabolism, the levels of cytochrome P450 enzymes were at least 300-fold lower indicating they play no significant role. Four epidermal models of human skin had profiles very similar to one another and these overlapped substantially with that of whole skin. Conclusions/Significance The proteomics profiling approach was successful in producing a comprehensive analysis of the biotransformation characteristics of whole human skin and various in vitro skin models. The results show that skin contains a range of defined enzymes capable of metabolising different classes of chemicals. The degree of similarity of the profiles of the in vitro models indicates their suitability for epidermal toxicity testing. Overall, these results provide a rational basis for explaining the fate of xenobiotics in skin and will aid chemical safety testing programmes.
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Affiliation(s)
- Sven van Eijl
- Centre for Pharmacology and Therapeutics, Division of Experimental Medicine, Imperial College London, London, United Kingdom
| | - Zheying Zhu
- Centre for Pharmacology and Therapeutics, Division of Experimental Medicine, Imperial College London, London, United Kingdom
| | - John Cupitt
- Centre for Pharmacology and Therapeutics, Division of Experimental Medicine, Imperial College London, London, United Kingdom
| | - Magdalena Gierula
- Centre for Pharmacology and Therapeutics, Division of Experimental Medicine, Imperial College London, London, United Kingdom
| | - Christine Götz
- Leibniz Institut für Umweltmedizinische Forschung, Heinrich-Heine-Universität, Düsseldorf, Germany
| | - Ellen Fritsche
- Leibniz Institut für Umweltmedizinische Forschung, Heinrich-Heine-Universität, Düsseldorf, Germany
- Department of Dermatology and Allergology, University Clinic RWTH, Aachen, Germany
| | - Robert J. Edwards
- Centre for Pharmacology and Therapeutics, Division of Experimental Medicine, Imperial College London, London, United Kingdom
- * E-mail:
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Hafner A, Lovrić J, Pepić I, Filipović-Grčić J. Lecithin/chitosan nanoparticles for transdermal delivery of melatonin. J Microencapsul 2012; 28:807-15. [PMID: 22117177 DOI: 10.3109/02652048.2011.622053] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this study, the potential of lecithin/chitosan nanoparticles (NPs) as colloidal nanosystem for transdermal melatonin delivery was investigated. Mean diameter and zeta-potential of NPs differing in lecithin type (Lipoid S45 and S100) and chitosan content ranged between 113.7 and 331.5 nm and 4.6 and 31.2 mV, respectively. Melatonin loadings were up to 7.2%. The potential of lecithin/chitosan NPs to enhance transdermal melatonin delivery was investigated by determining the drug flux across dermatomed porcine skin and its skin deposition. Lecithin/chitosan NPs provided 1.3-2.3-fold higher flux compared to melatonin solution. The highest flux, 9.0 ± 0.21 µg/cm²/h, was observed for S45 lecithin/chitosan NPs with lecithin/chitosan weight ratio of 20:1. NP possible cytotoxicity in vitro was evaluated using human skin keratinocytes and fibroblasts. It was demonstrated that lecithin/chitosan NPs can be applied to skin cells at concentrations up to 200 µg/mL without inducing plasma membrane damage or cell viability decrease.
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Affiliation(s)
- Anita Hafner
- Department of Pharmaceutics, Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia.
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48
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Feng B, Ye WL, Ma LJ, Fang Y, Mei YA, Wei SM. Hydrogen peroxide enhanced Ca(2+)-activated BK currents and promoted cell injury in human dermal fibroblasts. Life Sci 2012; 90:424-31. [PMID: 22273755 DOI: 10.1016/j.lfs.2011.12.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 11/19/2011] [Accepted: 12/22/2011] [Indexed: 01/01/2023]
Abstract
AIMS Recent studies have shown that dermal fibroblasts possess multiple types of voltage-dependent K(+) channels, and the activation of these channels induces apoptosis. In the present study, we aimed to investigate whether hydrogen peroxide (H(2)O(2)), an oxidative stress inducer, could modulate these channels or induce human dermal fibroblasts injury. MAIN METHODS The effects of H(2)O(2) on K(+) currents were studied using a whole-cell recording. Intracellular PKC levels were measured with a direct human PKC enzyme immunoassay kit. Cell viability was assessed using PI staining and apoptotic nuclei were detected with TdT-mediated digoxigenin-dUTP nick-end labelling assay (TUNEL) assay. KEY FINDINGS Treatment of cells with 100μM H(2)O(2) resulted in a partially reversible increase in non-inactivating outward K(+) currents and an alteration in the steady-state activation property of the channels. The H(2)O(2)-induced increase in K(+) currents was mimicked by a PKC activator, and was blocked by the PKC inhibitor or the large conductance Ca(2+)-activited K(+) (BK) channel blockers. The intracellular PKC levels were significantly enhanced by H(2)O(2) treatment in a concentration-dependent manner. After exposure to H(2)O(2), evaluation of fibroblasts survival rate and damaged cell number with TUNEL-positive nuclei revealed an increased cell injury. Blocking the K(+) channels with blockers significantly decreased the H(2)O(2)-induced human dermal fibroblasts injury. SIGNIFICANCE Our results revealed that H(2)O(2) could enhance BK currents by PKC pathway. Increased K(+) currents might be related to H(2)O(2)-induced human dermal fibroblasts injury. The results reported here contribute to our understanding of the mechanism underlying H(2)O(2)-induced human dermal fibroblasts injury.
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Affiliation(s)
- Bing Feng
- School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China
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49
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Jaksic I, Lukic M, Malenovic A, Reichl S, Hoffmann C, Müller-Goymann C, Daniels R, Savic S. Compounding of a topical drug with prospective natural surfactant-stabilized pharmaceutical bases: Physicochemical and in vitro/in vivo characterization – A ketoprofen case study. Eur J Pharm Biopharm 2012; 80:164-75. [DOI: 10.1016/j.ejpb.2011.09.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 09/04/2011] [Accepted: 09/05/2011] [Indexed: 10/17/2022]
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50
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Guo B, Sun Y, Finne-Wistrand A, Mustafa K, Albertsson AC. Electroactive porous tubular scaffolds with degradability and non-cytotoxicity for neural tissue regeneration. Acta Biomater 2012; 8:144-53. [PMID: 21985870 DOI: 10.1016/j.actbio.2011.09.027] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 09/22/2011] [Accepted: 09/22/2011] [Indexed: 01/08/2023]
Abstract
Electroactive degradable porous tubular scaffolds were fabricated from the blends of polycaprolactone and a hyperbranched degradable conducting copolymer at different feed ratios by a solution-casting/salt-leaching method. Scaning electron microscopy (SEM) and microcomputed tomography tests indicated that these scaffolds had homogeneously distributed interconnected pores on the cross-section and surface. The electrical conductivity of films with the same composition as the scaffolds was between 3.4×10(-6) and 3.1×10(-7) S cm(-1), depending on the ratio of hyperbranched degradable conducting copolymer to polycaprolactone. A hydrophilic surface with a contact angle of water about 30° was achieved by doping the films with (±)-10-camphorsulfonic acid. The mechanical properties of the films were investigated by tensile tests, and the morphology of the films was studied by SEM. The scaffolds were subjected to the WST test (a cell proliferation and cytotoxicity assay using water-soluble tetrazolium salts) with HaCaT keratinocyte cells, and the results show that these scaffolds are non-cytotoxic. These degradable electroactive tubular scaffolds are good candidates for neural tissue engineering application.
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