1
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Kole GE, Hasirci V, Yucel D. Development of a Tri-Layered Vascular Construct and In Vitro Evaluation of Endothelization. Macromol Biosci 2024; 24:e2300369. [PMID: 38134246 DOI: 10.1002/mabi.202300369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 12/18/2023] [Indexed: 12/24/2023]
Abstract
Advances in the development of vascular substitutes for small-sized arteries are ongoing because the present grafts do not entirely meet the requirements of native equivalents and are suboptimal in clinical performance. This study aims to develop a tri-layered vascular construct mimicking natural tissue using polyester blends and to investigate its endothelization through in vitro studies as a potential small-caliber vascular graft. The innermost layer is obtained by dip coating as a tubular porous film with a lumen diameter of 3 mm and a pore size of ≤8 µm. Circumferentially aligned electrospun fiber (diameter 100-800 nm) with a deviation angle of 15° are deposited over the porous film forming the intermediate layer. The random electrospun fibers (diameter 100-1100 nm) deviating at different angles are wrapped as the outermost layer. The mechanical properties of the tri-layered vascular construct are determined to be 44.80 ± 14.80 MPa for Young's modulus and 4.25 ± 0.75 MPa for ultimate tensile strength. MTS and cell behavior studies show that the isolated human umbilical cord vein endothelial cells proliferate and line the lumen of the vascular substitute. The vascular construct developed, with its biomimetic architecture, mechanical features, size, and endothelization, can be tested with in vivo studies.
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Affiliation(s)
- Gozde E Kole
- Graduate School of Health Sciences, Department of Medical Biotechnology, Acıbadem Mehmet Ali Aydınlar University (ACU), Istanbul, 34752, Turkey
- ACU Biomaterials A &R Center, Acıbadem Mehmet Ali Aydınlar University (ACU), Istanbul, 34752, Turkey
| | - Vasif Hasirci
- ACU Biomaterials A &R Center, Acıbadem Mehmet Ali Aydınlar University (ACU), Istanbul, 34752, Turkey
- Faculty of Engineering and Natural Sciences, Department of Biomedical Engineering, Acıbadem Mehmet Ali Aydınlar University (ACU), Istanbul, 34752, Turkey
- Graduate School of Natural and Applied Sciences, Department of Biomaterials, Acıbadem Mehmet Ali Aydınlar University (ACU), Istanbul, 34752, Turkey
- Middle East Technical University, BIOMATEN Center of Excellence in Biomaterials and Tissue Engineering, Ankara, 06800, Turkey
| | - Deniz Yucel
- Graduate School of Health Sciences, Department of Medical Biotechnology, Acıbadem Mehmet Ali Aydınlar University (ACU), Istanbul, 34752, Turkey
- ACU Biomaterials A &R Center, Acıbadem Mehmet Ali Aydınlar University (ACU), Istanbul, 34752, Turkey
- Graduate School of Natural and Applied Sciences, Department of Biomaterials, Acıbadem Mehmet Ali Aydınlar University (ACU), Istanbul, 34752, Turkey
- School of Medicine, Department of Histology and Embryology, Acıbadem Mehmet Ali Aydınlar University (ACU), Istanbul, 34752, Turkey
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2
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Nikolić N, Olmos D, Kramar A, González-Benito J. Effect of Collector Rotational Speed on the Morphology and Structure of Solution Blow Spun Polylactic Acid (PLA). Polymers (Basel) 2024; 16:191. [PMID: 38256990 PMCID: PMC10819695 DOI: 10.3390/polym16020191] [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: 12/21/2023] [Revised: 01/05/2024] [Accepted: 01/06/2024] [Indexed: 01/24/2024] Open
Abstract
Apart from structure and composition, morphology plays a significant role in influencing the performance of materials in terms of both bulk and surface behavior. In this work, polylactic acid (PLA) constituted by submicrometric fibers is prepared. Using a modified electrospinning (ES) device to carry out solution blow spinning (SBS), the fibrillar morphology is modified, with the aim to induce variations in the properties of the material. The modification of the ES device consists of the incorporation of a source of pressurized gas (air) and a 3D-printed nozzle of our own design. For this work, the morphology of the PLA submicrometric fibers is modified by varying the rotational speed of the collector in order to understand its influence on different properties and, consequently, on the performance of the material. The rotational speed of a cylindrical collector (250, 500, 1000 and 2000 rpm) is considered as variable for changing the morphology. Morphological study of the materials was performed using scanning electron microscopy and image analysis carried out with ImageJ 1.54f software. Besides a morphology study, structural characterization by Fourier transformed infrared spectroscopy using attenuated total reflectance of prepared materials is carried out. Finally, the morphology and structure of produced PLA fibrous mats were correlated with the analysis of mechanical properties, wettability behavior and adhesion of DH5-α E. coli bacteria. It is of interest to highlight how small morphological and chemical structure variations can lead to important changes in materials' performance. These changes include, for example, those above 30% in some mechanical parameters and clear variations in bacterial adhesion capacity.
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Affiliation(s)
- Nataša Nikolić
- Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, 28911 Leganés, Madrid, Spain; (N.N.); (D.O.); (A.K.)
| | - Dania Olmos
- Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, 28911 Leganés, Madrid, Spain; (N.N.); (D.O.); (A.K.)
- Instituto Tecnológico de Química y Materiales “Álvaro Alonso Barba”, Universidad Carlos III de Madrid, 28911 Leganés, Madrid, Spain
| | - Ana Kramar
- Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, 28911 Leganés, Madrid, Spain; (N.N.); (D.O.); (A.K.)
- Instituto Tecnológico de Química y Materiales “Álvaro Alonso Barba”, Universidad Carlos III de Madrid, 28911 Leganés, Madrid, Spain
| | - Javier González-Benito
- Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, 28911 Leganés, Madrid, Spain; (N.N.); (D.O.); (A.K.)
- Instituto Tecnológico de Química y Materiales “Álvaro Alonso Barba”, Universidad Carlos III de Madrid, 28911 Leganés, Madrid, Spain
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3
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Rolińska K, Bakhshi H, Balk M, Blocki A, Panwar A, Puchalski M, Wojasiński M, Mazurek-Budzyńska M. Electrospun Poly(carbonate-urea-urethane)s Nonwovens with Shape-Memory Properties as a Potential Biomaterial. ACS Biomater Sci Eng 2023; 9:6683-6697. [PMID: 38032398 PMCID: PMC10716822 DOI: 10.1021/acsbiomaterials.3c01214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 12/01/2023]
Abstract
Poly(carbonate-urea-urethane) (PCUU)-based scaffolds exhibit various desirable properties for tissue engineering applications. This study thus aimed to investigate the suitability of PCUU as polymers for the manufacturing of nonwoven mats by electrospinning, able to closely mimic the fibrous structure of the extracellular matrix. PCUU nonwovens of fiber diameters ranging from 0.28 ± 0.07 to 0.82 ± 0.12 μm were obtained with an average surface porosity of around 50-60%. Depending on the collector type and solution concentration, a broad range of tensile strengths (in the range of 0.3-9.6 MPa), elongation at break (90-290%), and Young's modulus (5.7-26.7 MPa) at room temperature of the nonwovens could be obtained. Furthermore, samples collected on the plate collector showed a shape-memory effect with a shape-recovery ratio (Rr) of around 99% and a shape-fixity ratio (Rf) of around 96%. Biological evaluation validated the inertness, stability, and lack of cytotoxicity of PCUU nonwovens obtained on the plate collector. The ability of mesenchymal stem cells (MSCs) and endothelial cells (HUVECs) to attach, elongate, and grow on the surface of the nonwovens suggests that the manufactured nonwovens are suitable scaffolds for tissue engineering applications.
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Affiliation(s)
- Karolina Rolińska
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
- Faculty
of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Hadi Bakhshi
- Department
of Life Science and Bioprocesses, Fraunhofer
Institute for Applied Polymer Research IAP, Geiselbergstraße 69, 14476 Potsdam, Germany
| | - Maria Balk
- Institute
of Active Polymers, Helmholtz-Zentrum Hereon, Kantstraße 55, 14513 Teltow, Germany
| | - Anna Blocki
- Institute
for Tissue Engineering and Regenerative Medicine, The Chinese University
of Hong Kong, Shatin, New Territories 999077, Hong Kong
- School of
Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories 999077, Hong Kong
- Center
for Neuromusculoskeletal Restorative Medicine, The Chinese University of Hong Kong, Shatin, New Territories 999077, Hong Kong
| | - Amit Panwar
- Institute
for Tissue Engineering and Regenerative Medicine, The Chinese University
of Hong Kong, Shatin, New Territories 999077, Hong Kong
- School of
Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories 999077, Hong Kong
- Center
for Neuromusculoskeletal Restorative Medicine, The Chinese University of Hong Kong, Shatin, New Territories 999077, Hong Kong
| | - Michał Puchalski
- Institute
of Material Science of Textiles and Polymer Composites, Faculty of
Material Technologies and Textile Design, Lodz University of Technology, ul. Żeromskiego 116, 90-924 Łódź, Poland
| | - Michał Wojasiński
- Faculty
of Chemical and Process Engineering, Department of Biotechnology and
Bioprocess Engineering, Laboratory of Biomedical Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645 Warsaw, Poland
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4
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Wang L, Chen J, Li Z, Guo F. Prolonged Anesthesia Effects of Locally Administered Ropivacaine via Electrospun Poly(caprolactone) Fibrous Membranes. MEMBRANES 2023; 13:861. [PMID: 37999348 PMCID: PMC10672809 DOI: 10.3390/membranes13110861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/14/2023] [Accepted: 10/24/2023] [Indexed: 11/25/2023]
Abstract
Prolonged analgesia is important to safeguard the patient's comfort and safety during and after surgery in clinical practice. To meet the demand for prolonged analgesia, medical professionals often resort to increasing drug frequency, which may lead to poor patient compliance and serious complications due to drug overdose. Therefore, it is of great interest to develop controlled-release drug delivery systems for local anesthetics, enabling slow and controlled drug release to prolong the analgesic effect and minimize systemic toxicity. In this study, we utilized an electrospinning technique to fabricate nonwoven poly(caprolactone) (PCL) fibrous membranes loaded with Ropivacaine and performed proof-of-principle experiments on both in vitro drug release tests and in vivo animal tests, to further prolong the analgesic effect of Ropivacaine and improve postoperative local pain management and chronic pain treatment. Material characterization and in vitro drug release studies confirmed the feasibility of the Ropivacaine-loaded PCL fibrous membranes for sustained release. The drug loading content and drug loading efficiency of Ropivacaine-loaded fibrous membrane are 8.7 ± 0.3 wt% and 96 ± 3 wt%, respectively. Evaluation in an animal model demonstrated prolonged anesthesia effects along with excellent biocompatibility and stability. At 72 h, the cumulative release accounted for approximately 50% of the drug loading content. This study offers novel approaches and strategies for clinical postoperative pain management and chronic pain treatment, while providing new insights and directions for the design of local anesthetic controlled-release delivery systems.
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Affiliation(s)
- Li Wang
- Department of Anaesthesiology, Central Hospital of Dalian University of Technology, No. 826 Xinan Road, Dalian 116033, China; (L.W.); (Z.L.)
| | - Jiaming Chen
- School of Energy and Power Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China;
| | - Zicen Li
- Department of Anaesthesiology, Central Hospital of Dalian University of Technology, No. 826 Xinan Road, Dalian 116033, China; (L.W.); (Z.L.)
- Graduate School, Dalian Medical University, No. 9 West Section Lvshun South Road, Dalian 116044, China
| | - Fei Guo
- School of Energy and Power Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China;
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5
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Langwald SV, Ehrmann A, Sabantina L. Measuring Physical Properties of Electrospun Nanofiber Mats for Different Biomedical Applications. MEMBRANES 2023; 13:488. [PMID: 37233549 PMCID: PMC10220787 DOI: 10.3390/membranes13050488] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/26/2023] [Accepted: 04/27/2023] [Indexed: 05/27/2023]
Abstract
Electrospun nanofiber mats are nowadays often used for biotechnological and biomedical applications, such as wound healing or tissue engineering. While most studies concentrate on their chemical and biochemical properties, the physical properties are often measured without long explanations regarding the chosen methods. Here, we give an overview of typical measurements of topological features such as porosity, pore size, fiber diameter and orientation, hydrophobic/hydrophilic properties and water uptake, mechanical and electrical properties as well as water vapor and air permeability. Besides describing typically used methods with potential modifications, we suggest some low-cost methods as alternatives in cases where special equipment is not available.
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Affiliation(s)
- Sarah Vanessa Langwald
- Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences and Arts, 33619 Bielefeld, Germany;
| | - Andrea Ehrmann
- Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences and Arts, 33619 Bielefeld, Germany;
| | - Lilia Sabantina
- Faculty of Clothing Technology and Garment Engineering, School of Culture + Design, HTW Berlin—University of Applied Sciences, 12459 Berlin, Germany
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6
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Park H, Si H, Gu J, Lee D, Park D, Lee YI, Kim K. Engineered kirigami design of PVDF-Pt core-shell nanofiber network for flexible transparent electrode. Sci Rep 2023; 13:2582. [PMID: 36788304 PMCID: PMC9929047 DOI: 10.1038/s41598-023-29812-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
Nanofiber networks comprising polymer-metal core-shell structures exhibit several advantages, such as high uniformities and considerable flexibilities. Additionally, the flexibility of the nanofiber network may be further enhanced by engineering the network topology. Therefore, in this study, the topologies of polyvinylidene fluoride (PVDF)-Pt core-shell nanofiber (CS NF) networks were engineered, and their performances as flexible transparent electrodes were comprehensively evaluated. Three distinct topologies of nanofiber networks were induced using circular, square, and rectangular electrode collectors. A highly uniform nanofiber network was obtained using the square electrode collector, which generated a high density of nanofiber junctions (nodes). Consequently, this nanofiber network exhibited the smallest sheet resistance [Formula: see text] and lowest optical transmittance [Formula: see text] among the three CS NF networks. In contrast, nanofiber bundles were frequently formed in the randomly aligned CS NF network prepared using the circular electrode collector, reducing the node density. As a result, it simultaneously exhibited a very small [Formula: see text] and high [Formula: see text], generating the largest percolation figure of merit [Formula: see text]. Under certain strain directions, the CS NF network with the engineered topology exhibited a significantly enhanced mechanical durability. Finally, a flexible piezoelectric pressure sensor with CS NF network electrodes was fabricated and its sensing performance was excellent.
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Affiliation(s)
- Heesung Park
- grid.412485.e0000 0000 9760 4919Department of Manufacturing Systems and Design Engineering (MSDE), Seoul National University of Science and Technology (SeoulTech), Seoul, 01811 Republic of Korea
| | - Hyeokjun Si
- grid.412485.e0000 0000 9760 4919Department of Manufacturing Systems and Design Engineering (MSDE), Seoul National University of Science and Technology (SeoulTech), Seoul, 01811 Republic of Korea
| | - Junseo Gu
- grid.412485.e0000 0000 9760 4919Department of Manufacturing Systems and Design Engineering (MSDE), Seoul National University of Science and Technology (SeoulTech), Seoul, 01811 Republic of Korea
| | - Donghyun Lee
- grid.412485.e0000 0000 9760 4919Department of Manufacturing Systems and Design Engineering (MSDE), Seoul National University of Science and Technology (SeoulTech), Seoul, 01811 Republic of Korea
| | - Donghyuck Park
- grid.412485.e0000 0000 9760 4919Department of Manufacturing Systems and Design Engineering (MSDE), Seoul National University of Science and Technology (SeoulTech), Seoul, 01811 Republic of Korea
| | - Young-In Lee
- grid.412485.e0000 0000 9760 4919Department of Materials Science and Engineering, Seoul National University of Science and Technology (Seoultech), Seoul, 01811 Republic of Korea
| | - Kwanlae Kim
- Department of Manufacturing Systems and Design Engineering (MSDE), Seoul National University of Science and Technology (SeoulTech), Seoul, 01811, Republic of Korea.
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7
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Salimi-Kenari H, Barari M, Nabavi SR, Mousavi Anjeh A, Hosseini SR. Step by Step Modification of Electrospinning Process to Fabricate Ultra-Fine Dextran Nanofibers. POLYM-PLAST TECH MAT 2023. [DOI: 10.1080/25740881.2022.2113895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Hamed Salimi-Kenari
- Department of Chemical Engineering, Faculty of Engineering and Technology, University of Mazandaran, Babolsar Iran
| | - Mehdi Barari
- Department of Chemical Engineering, Faculty of Engineering and Technology, University of Mazandaran, Babolsar Iran
| | - Seyed Reza Nabavi
- Department of Applied Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar Iran
| | - Atefeh Mousavi Anjeh
- Department of Applied Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar Iran
| | - Sayed Reza Hosseini
- Department of Applied Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar Iran
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8
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Pisani S, Genta I, Modena T, Dorati R, Bruni G, Benazzo M, Conti B. A proof of concept to define the parameters affecting poly-L-lactide-co-poly-ε-caprolactone shape memory electrospun nanofibers for biomedical applications. Drug Deliv Transl Res 2023; 13:593-607. [PMID: 35978259 PMCID: PMC9794533 DOI: 10.1007/s13346-022-01218-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2022] [Indexed: 12/31/2022]
Abstract
This study is a proof of concept performed to evaluate process parameters affecting shape memory effect of copolymer poly-L-lactide-co-poly-ε-caprolactone (PLA:PCL) 70:30 ratio based nanofibrous scaffolds. A design of experiment (DOE) statistical approach was used to define the interaction between independent material and process variables related to electrospun scaffold manufacturing, such as polymer solution concentration (w/v%), spinning time (min), and needle size (Gauge), and their influence on Rf% (ability of the scaffold to maintain the induced temporary shape) and Rr% (ability of the scaffold to recover its original shape) outputs. A mathematical model was obtained from DOE useful to predict scaffold Rf% and Rr% values. PLA-PCL 15% w/v, 22G needle, and 20-min spinning time were selected to confirm the data obtained from theoretical model. Subsequent morphological (SEM), chemical-physical (GPC and DSC), mechanical (uniaxial tensile tests), and biological (cell viability and adhesion) characterizations were performed.
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Affiliation(s)
- Silvia Pisani
- grid.419425.f0000 0004 1760 3027Department of Surgical Sciences, Otorhinolaryngology Unit, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy
| | - Ida Genta
- grid.8982.b0000 0004 1762 5736Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy
| | - Tiziana Modena
- grid.8982.b0000 0004 1762 5736Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy
| | - Rossella Dorati
- grid.8982.b0000 0004 1762 5736Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy
| | - Giovanna Bruni
- grid.8982.b0000 0004 1762 5736Department of Chemistry, Physico-Chemical Section, University of Pavia, Via Taramelli 14, 27100 Pavia, Italy
| | - Marco Benazzo
- grid.419425.f0000 0004 1760 3027Department of Surgical Sciences, Otorhinolaryngology Unit, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy
| | - Bice Conti
- Department of Drug Sciences, University of Pavia, 27100, Pavia, Italy.
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9
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Graphene Nanoplatelets-Based Textured Polymeric Fibrous Fabrics for the Next-Generation Devices. Polymers (Basel) 2022; 14:polym14245415. [PMID: 36559782 PMCID: PMC9785025 DOI: 10.3390/polym14245415] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/02/2022] [Accepted: 12/08/2022] [Indexed: 12/14/2022] Open
Abstract
Graphene is a 2D crystal composed of carbon atoms in a hexagonal arrangement. From their isolation, graphene nanoplatelets (nCD) have revolutionized material science due to their unique properties, and, nowadays, there are countless applications, including drug delivery, biosensors, energy storage, and tissue engineering. Within this work, nCD were combined with PLA, a widely used and clinically relevant thermoplastic polymer, to produce advanced composite texturized electrospun fabric for the next-generation devices. The electrospinning manufacturing process was set-up by virtue of a proper characterization of the composite raw material and its solution. From the morphological point of view, the nCD addition permitted the reduction of the fiber diameter while the texture allowed more aligned fibers. After that, mechanical features of fabrics were tested at RT and upon heating (40 °C, 69 °C), showing the reinforcement action of nCD mainly in the texturized mats at 40 °C. Finally, mats' degradation in simulated physiological fluid was minimal up to 30 d, even if composite mats revealed excellent fluid-handling capability. Moreover, no toxic impurities and degradation products were pointed out during the incubation. This work gains insight on the effects of the combination of composite carbon-based material and texturized fibers to reach highly performing fabrics.
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10
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Pisani S, Genta I, Dorati R, Modena T, Chiesa E, Bruni G, Benazzo M, Conti B. A Design of Experiment (DOE) approach to correlate PLA-PCL electrospun fibers diameter and mechanical properties for soft tissue regeneration purposes. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2021.103060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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11
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Pisani S, Croce S, Mauramati S, Marmonti M, Cobianchi L, Herman I, Dorati R, Avanzini MA, Genta I, Benazzo M, Conti B. Engineered Full Thickness Electrospun Scaffold for Esophageal Tissue Regeneration: From In Vitro to In Vivo Approach. Pharmaceutics 2022; 14:pharmaceutics14020252. [PMID: 35213985 PMCID: PMC8876746 DOI: 10.3390/pharmaceutics14020252] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/14/2022] [Accepted: 01/17/2022] [Indexed: 02/01/2023] Open
Abstract
Acquired congenital esophageal malformations, such as malignant esophageal cancer, require esophagectomy resulting in full thickness resection, which cannot be left untreated. The proposed approach is a polymeric full-thickness scaffold engineered with mesenchymal stem cells (MSCs) to promote and speed up the regeneration process, ensuring adequate support and esophageal tissue reconstruction and avoiding the use of autologous conduits. Copolymers poly-L-lactide-co-poly-ε-caprolactone (PLA-PCL) 70:30 and 85:15 ratio were chosen to prepare electrospun tubular scaffolds. Electrospinning apparatus equipped with two different types of tubular mandrels: cylindrical (∅ 10 mm) and asymmetrical (∅ 10 mm and ∅ 8 mm) were used. Tubular scaffolds underwent morphological, mechanical (uniaxial tensile stress) and biological (MTT and Dapi staining) characterization. Asymmetric tubular geometry resulted in the best properties and was selected for in vivo surgical implantation. Anesthetized pigs underwent full thickness circumferential resection of the mid-lower thoracic esophagus, followed by implantation of the asymmetric scaffold. Preliminary in vivo results demonstrated that detached stitch suture achieved better results in terms of animal welfare and scaffold integration; thus, it is to be preferred to continuous suture.
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Affiliation(s)
- Silvia Pisani
- Otorhinolaryngology Unit, Department of Surgical Sciences, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy; (S.M.); (I.H.); (M.B.)
- Correspondence:
| | - Stefania Croce
- Department of Clinical, Surgical, Diagnostic & Pediatric Sciences, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy; (S.C.); (L.C.)
| | - Simone Mauramati
- Otorhinolaryngology Unit, Department of Surgical Sciences, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy; (S.M.); (I.H.); (M.B.)
| | - Marta Marmonti
- Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy; (M.M.); (R.D.); (I.G.); (B.C.)
| | - Lorenzo Cobianchi
- Department of Clinical, Surgical, Diagnostic & Pediatric Sciences, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy; (S.C.); (L.C.)
| | - Irene Herman
- Otorhinolaryngology Unit, Department of Surgical Sciences, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy; (S.M.); (I.H.); (M.B.)
| | - Rossella Dorati
- Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy; (M.M.); (R.D.); (I.G.); (B.C.)
| | | | - Ida Genta
- Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy; (M.M.); (R.D.); (I.G.); (B.C.)
| | - Marco Benazzo
- Otorhinolaryngology Unit, Department of Surgical Sciences, Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy; (S.M.); (I.H.); (M.B.)
| | - Bice Conti
- Department of Drug Sciences, University of Pavia, 27100 Pavia, Italy; (M.M.); (R.D.); (I.G.); (B.C.)
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12
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Bonferoni MC, Caramella C, Catenacci L, Conti B, Dorati R, Ferrari F, Genta I, Modena T, Perteghella S, Rossi S, Sandri G, Sorrenti M, Torre ML, Tripodo G. Biomaterials for Soft Tissue Repair and Regeneration: A Focus on Italian Research in the Field. Pharmaceutics 2021; 13:pharmaceutics13091341. [PMID: 34575417 PMCID: PMC8471088 DOI: 10.3390/pharmaceutics13091341] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/23/2021] [Accepted: 08/25/2021] [Indexed: 12/22/2022] Open
Abstract
Tissue repair and regeneration is an interdisciplinary field focusing on developing bioactive substitutes aimed at restoring pristine functions of damaged, diseased tissues. Biomaterials, intended as those materials compatible with living tissues after in vivo administration, play a pivotal role in this area and they have been successfully studied and developed for several years. Namely, the researches focus on improving bio-inert biomaterials that well integrate in living tissues with no or minimal tissue response, or bioactive materials that influence biological response, stimulating new tissue re-growth. This review aims to gather and introduce, in the context of Italian scientific community, cutting-edge advancements in biomaterial science applied to tissue repair and regeneration. After introducing tissue repair and regeneration, the review focuses on biodegradable and biocompatible biomaterials such as collagen, polysaccharides, silk proteins, polyesters and their derivatives, characterized by the most promising outputs in biomedical science. Attention is pointed out also to those biomaterials exerting peculiar activities, e.g., antibacterial. The regulatory frame applied to pre-clinical and early clinical studies is also outlined by distinguishing between Advanced Therapy Medicinal Products and Medical Devices.
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Affiliation(s)
| | | | | | - Bice Conti
- Correspondence: (M.C.B.); (B.C.); (F.F.)
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13
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Dorati R, Chiesa E, Rosalia M, Pisani S, Genta I, Bruni G, Modena T, Conti B. Tubular Electrospun Vancomycin-Loaded Vascular Grafts: Formulation Study and Physicochemical Characterization. Polymers (Basel) 2021; 13:2073. [PMID: 34202454 PMCID: PMC8272178 DOI: 10.3390/polym13132073] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/16/2021] [Accepted: 06/18/2021] [Indexed: 02/06/2023] Open
Abstract
This work aimed at formulating tubular grafts electrospun with a size < 6 mm and incorporating vancomycin as an antimicrobial agent. Compared to other papers, the present study succeeded in using medical healthcare-grade polymers and solvents permitted by ICH Topic Q3C (R4). Vancomycin (VMC) was incorporated into polyester synthetic polymers (poly-L-lactide-co-poly-ε-caprolactone and poly lactide-co-glycolide) using permitted solvents; moreover, a surfactant was added to the formulation in order to avoid the precipitation of VMC on fiber surface. A preliminary preformulation study was carried out to evaluate solubility of VMC in different aqueous and organic solvents and its stability. To reduce size of fibers and their orientation, we studied a solvent system based on methylene chloride and acetone (DCM/acetone), at different ratios (80:20, 70:30, and 60:40). Considering conductivity of solutions and their spinnability, solvent system at a 80:20 ratio was selected for the study. SEM images demonstrated that size of fibers, their distribution, and their orientation were affected by the incorporation of VMC and surfactant into polymer solution. Surfactant allowed for the reduction of precipitates of VMC on fiber surface, which are responsible of the high burst release in the first six hours; the release was mainly dependent on graft structure porosity, number of pores, and graft absorbent capability. A controlled release of VMC was achieved, covering a period from 96 to 168 h as a function of composition and structure; the concentration of VMC was significantly beyond VMC minimum inhibitory concentration (MIC, 2 ug/mL). These results indicated that the VMC tubular electrospun grafts not only controlled the local release of VMC, but also avoided onset of antibiotic resistance.
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Affiliation(s)
- Rossella Dorati
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (E.C.); (M.R.); (I.G.); (T.M.); (B.C.)
| | - Enrica Chiesa
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (E.C.); (M.R.); (I.G.); (T.M.); (B.C.)
| | - Mariella Rosalia
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (E.C.); (M.R.); (I.G.); (T.M.); (B.C.)
| | - Silvia Pisani
- Immunology and Transplantation Laboratory, Pediatric Hematology Oncology Unit, Department of Maternal and Children’s Health, Fondazione IRCCS Policlinico S. Matteo, 27100 Pavia, Italy;
| | - Ida Genta
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (E.C.); (M.R.); (I.G.); (T.M.); (B.C.)
| | - Giovanna Bruni
- Department of Chemistry, Physical Chemistry Section, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy;
| | - Tiziana Modena
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (E.C.); (M.R.); (I.G.); (T.M.); (B.C.)
| | - Bice Conti
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; (E.C.); (M.R.); (I.G.); (T.M.); (B.C.)
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14
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Kchaou M, Alquraish M, Abuhasel K, Abdullah A, Ali AA. Electrospun Nanofibrous Scaffolds: Review of Current Progress in the Properties and Manufacturing Process, and Possible Applications for COVID-19. Polymers (Basel) 2021; 13:916. [PMID: 33809662 PMCID: PMC8002202 DOI: 10.3390/polym13060916] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/02/2021] [Accepted: 03/05/2021] [Indexed: 12/16/2022] Open
Abstract
Over the last twenty years, researchers have focused on the potential applications of electrospinning, especially its scalability and versatility. Specifically, electrospun nanofiber scaffolds are considered an emergent technology and a promising approach that can be applied to biosensing, drug delivery, soft and hard tissue repair and regeneration, and wound healing. Several parameters control the functional scaffolds, such as fiber geometrical characteristics and alignment, architecture, etc. As it is based on nanotechnology, the concept of this approach has shown a strong evolution in terms of the forms of the materials used (aerogels, microspheres, etc.), the incorporated microorganisms used to treat diseases (cells, proteins, nuclei acids, etc.), and the manufacturing process in relation to the control of adhesion, proliferation, and differentiation of the mimetic nanofibers. However, several difficulties are still considered as huge challenges for scientists to overcome in relation to scaffolds design and properties (hydrophilicity, biodegradability, and biocompatibility) but also in relation to transferring biological nanofibers products into practical industrial use by way of a highly efficient bio-solution. In this article, the authors review current progress in the materials and processes used by the electrospinning technique to develop novel fibrous scaffolds with suitable design and that more closely mimic structure. A specific interest will be given to the use of this approach as an emergent technology for the treatment of bacteria and viruses such as COVID-19.
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Affiliation(s)
- Mohamed Kchaou
- Department of Mechanical Engineering, College of Engineering, University of Bisha, P.O. Box 001, Bisha 67714, Saudi Arabia; (M.A.); (K.A.); (A.A.A.)
| | - Mohammed Alquraish
- Department of Mechanical Engineering, College of Engineering, University of Bisha, P.O. Box 001, Bisha 67714, Saudi Arabia; (M.A.); (K.A.); (A.A.A.)
| | - Khaled Abuhasel
- Department of Mechanical Engineering, College of Engineering, University of Bisha, P.O. Box 001, Bisha 67714, Saudi Arabia; (M.A.); (K.A.); (A.A.A.)
| | - Ahmad Abdullah
- Department of Civil Engineering, College of Engineering, University of Bisha, P.O. Box 001, Bisha 67714, Saudi Arabia;
- Department of Civil Engineering, Faculty of Engineering, Aswan University, Aswan 81542, Egypt
| | - Ashraf A. Ali
- Department of Mechanical Engineering, College of Engineering, University of Bisha, P.O. Box 001, Bisha 67714, Saudi Arabia; (M.A.); (K.A.); (A.A.A.)
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15
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Robinson AJ, Pérez-Nava A, Ali SC, González-Campos JB, Holloway JL, Cosgriff-Hernandez EM. Comparative Analysis of Fiber Alignment Methods in Electrospinning. MATTER 2021; 4:821-844. [PMID: 35757372 PMCID: PMC9222234 DOI: 10.1016/j.matt.2020.12.022] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Fabrication of anisotropic materials is highly desirable in designing biomaterials and tissue engineered constructs. Electrospinning has been broadly adopted due to its versatility in producing non-woven fibrous meshes with tunable fiber diameters (from 10 nanometers to 10 microns), microarchitectures, and construct geometries. A myriad of approaches have been utilized to control fiber alignment of electrospun materials to achieve complex microarchitectures, improve mechanical properties, and provide topographical cellular cues. This review provides a comparative analysis of the techniques developed to generate fiber alignment in electrospun materials. A description of the underlying mechanisms that drive fiber alignment, setup variations for each technique, and the resulting impact on the aligned microarchitecture is provided. A critical analysis of the advantages and limitations of each approach is provided to guide researchers in method selection. Finally, future perspectives of advanced electrospinning methodologies are discussed in terms of developing a scalable method with precise control of microarchitecture.
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Affiliation(s)
- Andrew J. Robinson
- Department of Biomedical Engineering, University of Texas, Austin, Texas, 78712, United States
| | - Alejandra Pérez-Nava
- Biological and Chemical Research Institute, Universidad Michoacana de San Nicolás, de Hidalgo, Morelia, 58030, Mexico
| | - Shan C. Ali
- Department of Biomedical Engineering, University of Texas, Austin, Texas, 78712, United States
| | - J. Betzabe González-Campos
- Biological and Chemical Research Institute, Universidad Michoacana de San Nicolás, de Hidalgo, Morelia, 58030, Mexico
| | - Julianne L. Holloway
- Chemical Engineering, School for Engineering of Matter, Transport and Energy,Arizona State University, Tempe, 85287, Arizona, United States
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16
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Dorati R, Pisani S, Chiesa E, Genta I, Bruni G, Modena T, Conti B. Electrospun tubular vascular grafts to replace damaged peripheral arteries: A preliminary formulation study. Int J Pharm 2021; 596:120198. [PMID: 33540017 DOI: 10.1016/j.ijpharm.2021.120198] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 12/12/2022]
Abstract
Polymeric tubular vascular grafts represent a likely alternative to autologous vascular grafts for treating peripheral artery occlusive disease. This preliminary research study applied cutting-edge electrospinning technique for manufacturing prototypes with diameter ≤ 6 mm and based on biocompatible and biodegradable polymers such as polylactide-polycaprolactone, polylactide-co-glycolide and polyhydroxyethylmethacrylate combined in different design approaches (layering and blending). Samples were characterized about fiber morphology, diameter, size distribution, porosity, fluid uptake capability, and mechanical properties. Biocompatibility and cell interaction were evaluated by in vitro test. Goal of this preliminary study was to discriminate among the prototypes and select which composition and design approach could better suit tissue regeneration purposes. Results showed that electrospinning technique is suitable to obtain grafts with a diameter < 6 mm and thickness between 140 ± 7-175 ± 4 μm. Scanning electron microscopy analysis showed fibers with suitable micrometric diameters and pore size between 5 and 35 μm. polyhydroxyethylmethacrylate provided high hydrophilicity (≃ 100°) and optimal cell short term proliferation (cell viability ≃ 160%) in accordance with maximum fluid uptake ability (300-350%). Moreover, addition of polyhydroxyethylmethacrylate lowered suture retention strength at value < 1 N. Prototypes obtaining combining polylactide-co-glycolide and polylactide-coglycolide/ polyhydroxyethylmethacrylate with polylactide-polycaprolactone in a bilayered structure showed optimal mechanical behavior resembling native bovine vessel.
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Affiliation(s)
- Rossella Dorati
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; Polymerix s.r.l., Parco Tecnico Scientifico (PTS), Via Taramelli 20, 27100 Pavia, Italy
| | - Silvia Pisani
- Immunology and Transplantation Laboratory, Pediatric Hematology Oncology Unit, Department of Maternal and Children's Health, Fondazione IRCCS Policlinico S. Matteo, 27100 Pavia, Italy
| | - Enrica Chiesa
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy
| | - Ida Genta
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; Polymerix s.r.l., Parco Tecnico Scientifico (PTS), Via Taramelli 20, 27100 Pavia, Italy
| | - Giovanna Bruni
- Department of Chemistry, Physical Chemistry Section, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy
| | - Tiziana Modena
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; Polymerix s.r.l., Parco Tecnico Scientifico (PTS), Via Taramelli 20, 27100 Pavia, Italy
| | - Bice Conti
- Department of Drug Sciences, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy; Polymerix s.r.l., Parco Tecnico Scientifico (PTS), Via Taramelli 20, 27100 Pavia, Italy
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