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Zaca Moran O, García Suastegui WA, Cruz San Juan JH, López Méndez LC, López Gayou V. Generation of PVP Membranes Using Extracts/Phenolic Fraction of Dysphania ambrosioides, Opuntia ficus-indica, and Tradescantia pallida. Polymers (Basel) 2023; 15:4720. [PMID: 38139971 PMCID: PMC10747495 DOI: 10.3390/polym15244720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 12/24/2023] Open
Abstract
In the present work, electrospun membranes of polyvinylpyrrolidone (PVP) nanofibers were manufactured using extracts and phenolic fractions of Dysphania ambrosioides (epazote), Opuntia ficus-indica (nopal), and Tradescantia pallida (chicken grass). The characterization of the membranes was carried out by scanning electron microscopy and Fourier transform infrared spectroscopy. The membranes synthesized through the use of the extracts generally showed a slight decrease in the diameter of the fibers but an increase in the size of the pores due to the presence of nanoparticles (rosaries) on the surface of the fibers, while the membranes synthesized using the phenolic fraction demonstrated an inversely proportional relationship between the compounds of this family with the diameter of the fibers and the size of the pore, allowing to elucidate part of the polymerization mechanisms of PVP nanofibers, in addition to proposing a reaction mechanism in the interaction between PVP and phenolic compounds for surface functionalization. Likewise, we demonstrate that the generation of reaction seeds through functionalization allows the addition of other compounds to the fibers in the membranes synthesized using the complete extract.
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Affiliation(s)
- Orlando Zaca Moran
- Laboratorio de Bionanotecnología, Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional (IPN-CIBA), Tlaxcala 90700, Mexico; (O.Z.M.); (J.H.C.S.J.)
| | | | - Jonathan Hillel Cruz San Juan
- Laboratorio de Bionanotecnología, Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional (IPN-CIBA), Tlaxcala 90700, Mexico; (O.Z.M.); (J.H.C.S.J.)
| | | | - Valentin López Gayou
- Laboratorio de Bionanotecnología, Centro de Investigación en Biotecnología Aplicada, Instituto Politécnico Nacional (IPN-CIBA), Tlaxcala 90700, Mexico; (O.Z.M.); (J.H.C.S.J.)
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Epicoco L, Pellegrino R, Madaghiele M, Friuli M, Giannotti L, Di Chiara Stanca B, Palermo A, Siculella L, Savkovic V, Demitri C, Nitti P. Recent Advances in Functionalized Electrospun Membranes for Periodontal Regeneration. Pharmaceutics 2023; 15:2725. [PMID: 38140066 PMCID: PMC10747510 DOI: 10.3390/pharmaceutics15122725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 11/26/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
Periodontitis is a global, multifaceted, chronic inflammatory disease caused by bacterial microorganisms and an exaggerated host immune response that not only leads to the destruction of the periodontal apparatus but may also aggravate or promote the development of other systemic diseases. The periodontium is composed of four different tissues (alveolar bone, cementum, gingiva, and periodontal ligament) and various non-surgical and surgical therapies have been used to restore its normal function. However, due to the etiology of the disease and the heterogeneous nature of the periodontium components, complete regeneration is still a challenge. In this context, guided tissue/bone regeneration strategies in the field of tissue engineering and regenerative medicine have gained more and more interest, having as a goal the complete restoration of the periodontium and its functions. In particular, the use of electrospun nanofibrous scaffolds has emerged as an effective strategy to achieve this goal due to their ability to mimic the extracellular matrix and simultaneously exert antimicrobial, anti-inflammatory and regenerative activities. This review provides an overview of periodontal regeneration using electrospun membranes, highlighting the use of these nanofibrous scaffolds as delivery systems for bioactive molecules and drugs and their functionalization to promote periodontal regeneration.
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Affiliation(s)
- Luana Epicoco
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
- Institute of Medical Physics and Biophysics, University of Leipzig, 04103 Leipzig, Germany
| | - Rebecca Pellegrino
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
| | - Marta Madaghiele
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
| | - Marco Friuli
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
| | - Laura Giannotti
- Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy; (L.G.); (B.D.C.S.); (L.S.)
| | - Benedetta Di Chiara Stanca
- Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy; (L.G.); (B.D.C.S.); (L.S.)
| | - Andrea Palermo
- Implant Dentistry College of Medicine and Dentistry, Birmingham B4 6BN, UK;
| | - Luisa Siculella
- Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy; (L.G.); (B.D.C.S.); (L.S.)
| | - Vuk Savkovic
- Clinic and Polyclinic for Oral and Maxillofacial Plastic Surgery, University Hospital Leipzig, 04103 Leipzig, Germany;
| | - Christian Demitri
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
| | - Paola Nitti
- Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy; (R.P.); (M.M.); (M.F.); (C.D.)
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Soukup K, Topka P, Kupčík J, Solcova O. Platinum Nanoparticles Immobilized on Electrospun Membranes for Catalytic Oxidation of Volatile Organic Compounds. Membranes (Basel) 2023; 13:110. [PMID: 36676917 PMCID: PMC9864639 DOI: 10.3390/membranes13010110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/08/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Structured catalytic membranes with high porosity and a low pressure drop are particularly suitable for industrial processes carried out at high space velocities. One of these processes is the catalytic total oxidation of volatile organic compounds, which is an economically feasible and environmentally friendly way of emission abatement. Noble metal catalysts are typically preferred due to high activity and stability. In this paper, the preparation of a thermally stable polybenzimidazole electrospun membrane, which can be used as a support for a platinum catalyst applicable in the total oxidation of volatile organic compounds, is reported for the first time. In contrast to commercial pelletized catalysts, high porosity of the membrane allowed for easy accessibility of the platinum active sites to the reactants and the catalytic bed exhibited a low pressure drop. We have shown that the preparation conditions can be tuned in order to obtain catalysts with a desired platinum particle size. In the gas-phase oxidation of ethanol, acetone, and toluene, the catalysts with Pt particle sizes 2.1 nm and 26 nm exhibited a lower catalytic activity than that with a Pt particle size of 12 nm. Catalysts with a Pt particle size of 2.1 nm and 12 nm were prepared by equilibrium adsorption, and the higher catalytic activity of the latter catalyst was ascribed to more reactive adsorbed oxygen species on larger Pt nanoparticles. On the other hand, the catalyst with a Pt particle size of 26 nm was prepared by a solvent evaporation method and contained less active polycrystalline platinum. Last but not least, the catalyst containing only 0.08 wt.% of platinum achieved high conversion (90%) of all the model volatile organic compounds at moderate temperatures (lower than 335 °C), which is important for reducing the costs of the abatement technology.
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Affiliation(s)
- Karel Soukup
- Institute of Chemical Process Fundamentals of the CAS, CZ-165 00 Prague, Czech Republic
| | - Pavel Topka
- Institute of Chemical Process Fundamentals of the CAS, CZ-165 00 Prague, Czech Republic
| | - Jaroslav Kupčík
- Institute of Chemical Process Fundamentals of the CAS, CZ-165 00 Prague, Czech Republic
- FZU-Institute of Physics of the Czech Academy of Sciences, CZ-182 00 Prague, Czech Republic
| | - Olga Solcova
- Institute of Chemical Process Fundamentals of the CAS, CZ-165 00 Prague, Czech Republic
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Lin Z, Chen H, Xu J, Wang J, Wang H, Huang S, Xu S. A Review of the Release Profiles and Efficacies of Chemotherapy Drug-Loaded Electrospun Membranes. Polymers (Basel) 2023; 15:polym15020251. [PMID: 36679132 PMCID: PMC9865042 DOI: 10.3390/polym15020251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/25/2022] [Accepted: 12/28/2022] [Indexed: 01/05/2023] Open
Abstract
Electrospun fibrous membranes loaded with chemotherapy drugs have been broadly studied, many of which have had promising data demonstrating therapeutic effects on cancer cell inhibition, tumor size reduction, the life extension of tumor-bearing animals, and more. Nevertheless, their drug release profiles are difficult to predict since their degradation pattern varies with crystalline polymers. In addition, there is room for improving their release performances, optimizing the release patterns, and achieving better therapeutic outcomes. In this review, the key factors affecting electrospun membrane drug release profiles have been systematically reviewed. Case studies of the release profiles of typical chemotherapy drugs are carried out to determine the preferred polymer choices and techniques to achieve the expected prolonged or enhanced release profiles. The therapeutic effects of these electrospun, chemo-drug-loaded membranes are also discussed. This review aims to assist in the design of future drug-loaded electrospun materials to achieve preferred release profiles with enhanced therapeutic efficacies.
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Affiliation(s)
- Zhenyu Lin
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Hao Chen
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Jiawei Xu
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Jie Wang
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Huijing Wang
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Shifen Huang
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
| | - Shanshan Xu
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China
- Correspondence: ; Tel.: +86-755-26531165
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Agudelo W, Montoya Y, Garcia-Garcia A, Restrepo-Osorio A, Bustamante J. Electrochemical and Electroconductive Behavior of Silk Fibroin Electrospun Membrane Coated with Gold or Silver Nanoparticles. Membranes (Basel) 2022; 12:1154. [PMID: 36422146 PMCID: PMC9695740 DOI: 10.3390/membranes12111154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
The surface modification of materials obtained from natural polymers, such as silk fibroin with metal nanoparticles that exhibit intrinsic electrical characteristics, allows the obtaining of biocomposite materials capable of favoring the propagation and conduction of electrical impulses, acting as communicating structures in electrically isolated areas. On that basis, this investigation determined the electrochemical and electroconductive behavior through electrochemical impedance spectroscopy of a silk fibroin electrospun membrane from silk fibrous waste functionalized with gold or silver nanoparticles synthetized by green chemical reduction methodologies. Based on the results obtained, we found that silk fibroin from silk fibrous waste (SFw) favored the formation of gold (AuNPs-SFw) and silver (AgNPs-SFw) nanoparticles, acting as a reducing agent and surfactant, forming a micellar structure around the individual nanoparticle. Moreover, different electrospinning conditions influenced the morphological properties of the fibers, in the presence or absence of beads and the amount of sample collected. Furthermore, treated SFw electrospun membranes, functionalized with AuNPs-SFw or AgNPS-SFw, allowed the conduction of electrical stimuli, acting as stimulators and modulators of electric current.
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Affiliation(s)
- Wilson Agudelo
- Grupo de Dinámica Cardiovascular, Línea Ingeniería de Tejidos y Protésica Cardiovascular, Universidad Pontificia Bolivariana, Medellín 050031, Colombia
| | - Yuliet Montoya
- Grupo de Dinámica Cardiovascular, Línea Ingeniería de Tejidos y Protésica Cardiovascular, Universidad Pontificia Bolivariana, Medellín 050031, Colombia
- Comité de Trabajo de Bioingeniería Cardiovascular, Sociedad Colombiana de Cardiología y Cirugía Cardiovascular, Bogotá 110121, Colombia
| | - Alejandra Garcia-Garcia
- Grupo de Síntesis y Modificación de Nanoestructuras y Materiales Bidimensionales, Centro de Investigación en Materiales Avanzados S.C., Parque PIIT, Km 10, Autopista Monterrey-Aeropuerto, Apodaca 66628, Mexico
| | - Adriana Restrepo-Osorio
- Grupo de Investigación sobre Nuevos Materiales, Universidad Pontificia Bolivariana, Medellín 050031, Colombia
| | - John Bustamante
- Grupo de Dinámica Cardiovascular, Línea Ingeniería de Tejidos y Protésica Cardiovascular, Universidad Pontificia Bolivariana, Medellín 050031, Colombia
- Comité de Trabajo de Bioingeniería Cardiovascular, Sociedad Colombiana de Cardiología y Cirugía Cardiovascular, Bogotá 110121, Colombia
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Yang R, Zheng Y, Zhang Y, Li G, Xu Y, Zhang Y, Xu Y, Zhuang C, Yu P, Deng L, Cui W, Chen Y, Wang L. Bipolar Metal Flexible Electrospun Fibrous Membrane Based on Metal-Organic Framework for Gradient Healing of Tendon-to-Bone Interface Regeneration. Adv Healthc Mater 2022; 11:e2200072. [PMID: 35286782 DOI: 10.1002/adhm.202200072] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/28/2022] [Indexed: 12/17/2022]
Abstract
Metal ions play a significant role in tissue repair, with widely application in clinical treatment. However, the therapeutic effect of metal ions is always limited due to metabolization and narrow repair capability. Here, a bipolar metal flexible electrospun fibrous membrane based on a metal-organic framework (MOF), which is bioinspired by the gradient structure of the tendon-to-bone interface, with a combination of regulating osteoblasts differentiation and angiogenesis properties, is constructed successfully by a continuous electrospinning technique and matching the longitudinal space morphology for synchronous regeneration. Furthermore, the MOF, acting as carriers, can not only achieve the sustainable release of metal ions, but promote the osteogenesis and tenogenesis on the scaffold. The in vitro data show that this novel hierarchical structure can accelerate the tenogenesis, the biomineralization, and angiogenesis. Moreover, in the in vivo experiment, the flexible fibrous membrane can promote tendon and bone tissue repair, and fibrocartilage reconstruction, to realize the multiple tissue synchronous regeneration at the damaged tendon-to-bone interface. Altogether, this newly developed bipolar metal flexible electrospun fibrous membrane based on a MOF, as a new biomimetic flexible scaffold, has great potential in reconstruct the tissue damage, especially gradient tissue damage.
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Affiliation(s)
- Renhao Yang
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
| | - Yunlong Zheng
- State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University Tianjin 300071 P. R. China
| | - Yin Zhang
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
| | - Gen Li
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
| | - Yidong Xu
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
| | - Yin Zhang
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
| | - Yang Xu
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
| | - Chengyu Zhuang
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
| | - Pei Yu
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
| | - Lianfu Deng
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
| | - Wenguo Cui
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
| | - Yao Chen
- State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University Tianjin 300071 P. R. China
| | - Lei Wang
- Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 P. R. China
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Graça MFP, de Melo-Diogo D, Correia IJ, Moreira AF. Electrospun Asymmetric Membranes as Promising Wound Dressings: A Review. Pharmaceutics 2021; 13:183. [PMID: 33573313 PMCID: PMC7912487 DOI: 10.3390/pharmaceutics13020183] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/11/2021] [Accepted: 01/21/2021] [Indexed: 12/28/2022] Open
Abstract
Despite all the efforts that have been done up to now, the currently available wound dressings are still unable to fully re-establish all the structural and functional properties of the native skin. To overcome this situation, researchers from the tissue engineering area have been developing new wound dressings (hydrogels, films, sponges, membranes) aiming to mimic all the features of native skin. Among them, asymmetric membranes emerged as a promising solution since they reproduce both epidermal and dermal skin layers. Wet or dry/wet phase inversion, scCO2-assisted phase inversion, and electrospinning have been the most used techniques to produce such a type of membranes. Among them, the electrospinning technique, due to its versatility, allows the development of multifunctional dressings, using natural and/or synthetic polymers, which resemble the extracellular matrix of native skin as well as address the specific requirements of each skin layer. Moreover, various therapeutic or antimicrobial agents have been loaded within nanofibers to further improve the wound healing performance of these membranes. This review article provides an overview of the application of asymmetric electrospun membranes as wound dressings displaying antibacterial activity and as delivery systems of biomolecules that act as wound healing enhancers.
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Affiliation(s)
- Mariana F. P. Graça
- CICS-UBI—Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilha, Portugal; (M.F.P.G.); (D.d.M.-D.)
| | - Duarte de Melo-Diogo
- CICS-UBI—Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilha, Portugal; (M.F.P.G.); (D.d.M.-D.)
| | - Ilídio J. Correia
- CICS-UBI—Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilha, Portugal; (M.F.P.G.); (D.d.M.-D.)
- CIEPQPF—Departamento de Engenharia Química, Universidade de Coimbra, Rua Silvio Lima, 3030-790 Coimbra, Portugal
| | - André F. Moreira
- CICS-UBI—Centro de Investigação em Ciências da Saúde, Universidade da Beira Interior, Av. Infante D. Henrique, 6200-506 Covilha, Portugal; (M.F.P.G.); (D.d.M.-D.)
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Jackson J, Plackett D, Hsu E, Lange D, Evans R, Burt H. The Development of Solvent Cast Films or Electrospun Nanofiber Membranes Made from Blended Poly Vinyl Alcohol Materials with Different Degrees of Hydrolyzation for Optimal Hydrogel Dissolution and Sustained Release of Anti-Infective Silver Salts. Nanomaterials (Basel) 2021; 11:nano11010084. [PMID: 33401529 PMCID: PMC7824092 DOI: 10.3390/nano11010084] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Revised: 12/09/2020] [Accepted: 12/29/2020] [Indexed: 02/07/2023]
Abstract
Introduction: We previously described the manufacture and characterization of hydrogel forming, thin film, anti-infective wound dressings made from Poly Vinyl Alcohol (PVA) and silver nanoparticles, crosslinked by heat. However, these films were designed to be inexpensive for simple manufacture locally in Africa. In this new study, we have further developed PVA dressings by manufacturing films or electrospun membranes, made from blends of PVA with different degrees of hydrolyzation, that contain silver salts and degrade in a controlled manner to release silver in a sustained manner over 12 days. Methods: Films were solvent cast as films or electrospun into nanofibre membranes using blends of 99 and 88% hydrolyzed PVA, containing 1% w/w silver sulphadiazine, carbonate, sulphate, or acetate salts. Dissolution was measured as weight loss in water and silver release was measured using inductively coupled plasma (ICP) analysis. Results: Cast films generally stayed intact at PVA 99: PVA 88% ratios greater than 40:60 whereas electrospun membranes needed ratios greater than 10:90. Films (40:60 blend ratio) and membranes (10:90) all released silver salts in a sustained fashion but incompletely and to different extents. Electrospun membranes gave more linear release patterns in the 2–12 day period and all salts released well. Conclusion: Blended PVA cast films offer improved control over hydrogel dissolution and silver release without the need for high temperature crosslinking. Blended PVA electrospun membranes further improve membrane dissolution control and silver release profiles. These blended PVA films and membranes offer improved inexpensive systems for the manufacture of long lasting anti-infective hydrogel wound dressings.
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Affiliation(s)
- John Jackson
- Faculty of Pharmaceutical Sciences, UBC, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada; (D.P.); (E.H.); (H.B.)
- Correspondence:
| | - David Plackett
- Faculty of Pharmaceutical Sciences, UBC, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada; (D.P.); (E.H.); (H.B.)
| | - Eric Hsu
- Faculty of Pharmaceutical Sciences, UBC, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada; (D.P.); (E.H.); (H.B.)
| | - Dirk Lange
- Stone Centre, Department of Urological Sciences, UBC, Vancouver General Hospital, Vancouver, BC V5Z 1M9, Canada;
| | - Robin Evans
- Ventura County Medical Centre, UCLA School of Medicine, Ventura, CA 93003, USA;
| | - Helen Burt
- Faculty of Pharmaceutical Sciences, UBC, 2405 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada; (D.P.); (E.H.); (H.B.)
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Pimentel ES, Brito-Pereira R, Marques-Almeida T, Ribeiro C, Vaz F, Lanceros-Mendez S, Cardoso VF. Tailoring Electrospun Poly(l-lactic acid) Nanofibers as Substrates for Microfluidic Applications. ACS Appl Mater Interfaces 2020; 12:60-69. [PMID: 31808332 DOI: 10.1021/acsami.9b12461] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Novel microfluidic substrates based on electrospun poly(l-lactic acid) (PLLA) membranes were developed to increase the limited range of commercially available paper substrates, commonly used for the fabrication of microfluidic paper-based analytical devices. PLLA's advantageous properties include biodegradability, biocompatibility, ease of being processed in various tailored morphologies, and cost effectiveness, among others. Oriented and nonoriented electrospun PLLA membranes were fabricated using electrospinning and the influence of fiber orientation, addition of hydrophilic additives, and plasma treatments on the morphology, physicochemical properties, and capillary flow rates were evaluated and compared with the commercial Whatman paper. In addition, a proof-of-concept application based on the colorimetric detection of glucose in printed PLLA and paper-based microfluidic systems was also performed. The results show the potential of PLLA substrates for the fabrication of portable, disposable, eco-friendly, and cost-effective microfluidic systems with controllable properties that can be tailored according to specific biotechnological application requirements, being a suitable alternative to conventional paper-based substrates.
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Affiliation(s)
| | - Ricardo Brito-Pereira
- CMEMS-UMinho , Universidade do Minho , Campus de Azurém , 4800-058 Guimarães , Portugal
| | | | | | | | - Senentxu Lanceros-Mendez
- BCMaterials, Basque Center for Materials, Applications and Nanostructures , UPV/EHU Science Park , 48940 Leioa , Spain
- IKERBASQUE, Basque Foundation for Science , 48013 Bilbao , Spain
| | - Vanessa F Cardoso
- CMEMS-UMinho , Universidade do Minho , Campus de Azurém , 4800-058 Guimarães , Portugal
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Hu M, Korschelt K, Daniel P, Landfester K, Tremel W, Bannwarth MB. Fibrous Nanozyme Dressings with Catalase-Like Activity for H 2O 2 Reduction To Promote Wound Healing. ACS Appl Mater Interfaces 2017; 9:38024-38031. [PMID: 29019391 DOI: 10.1021/acsami.7b12212] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The concentrations of the redox pair hydrogen peroxide (H2O2) and oxygen (O2) can promote or decelerate the progression and duration of the wound healing process. Although H2O2 can reach critically high concentrations and prohibit healing, a sufficient O2 inflow to the wound is commonly desired. Herein, we describe the fabrication and use of a membrane that can contemptuously decrease H2O2 and increase O2 levels. Therefore, hematite nanozyme particles were integrated into electrospun and cross-linked poly(vinyl alcohol) membranes. Within the dual-compound membrane, the polymeric mesh provides a porous scaffold with high water permeability and the nanozymes act as a catalyst with catalase-like activity that can efficiently convert H2O2 into O2, as shown by a catalase assay. When comparing the growth of fibroblasts at an H2O2 concentration of 50 μM, the growth was largely enhanced when applying the nanozyme dressing. Thus, application of the nanozyme dressing can significantly reduce the harmful effect of higher H2O2 concentrations. The described catalytic membranes could be used in the future to provide an improved environment for cell proliferation in wounds and thus applied as advanced wound healing dressings.
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Affiliation(s)
- Minghan Hu
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Karsten Korschelt
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Phillip Daniel
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Katharina Landfester
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
| | - Wolfgang Tremel
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Markus B Bannwarth
- Max Planck Institute for Polymer Research , Ackermannweg 10, 55128 Mainz, Germany
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