1
|
Bjorgvinsdottir O, Ferguson SJ, Snorradottir BS, Gudjonsson T, Wuertz-Kozak K. The influence of physical and spatial substrate characteristics on endothelial cells. Mater Today Bio 2024; 26:101060. [PMID: 38711934 PMCID: PMC11070711 DOI: 10.1016/j.mtbio.2024.101060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/10/2024] [Accepted: 04/13/2024] [Indexed: 05/08/2024] Open
Abstract
Cardiovascular diseases are a main cause of death worldwide, leading to a growing demand for medical devices to treat this patient group. Central to the engineering of such devices is a good understanding of the biology and physics of cell-surface interactions. In existing blood-contacting devices, such as vascular grafts, the interaction between blood, cells, and material is one of the main limiting factors for their long-term durability. An improved understanding of the material's chemical- and physical properties as well as its structure all play a role in how endothelial cells interact with the material surface. This review provides an overview of how different surface structures influence endothelial cell responses and what is currently known about the underlying mechanisms that guide this behavior. The structures reviewed include decellularized matrices, electrospun fibers, pillars, pits, and grated surfaces.
Collapse
Affiliation(s)
- Oddny Bjorgvinsdottir
- Faculty of Pharmaceutical Sciences, University of Iceland, Hofsvallagata 53, 107 Reykjavik, Iceland
| | - Stephen J. Ferguson
- Institute for Biomechanics, ETH Zurich, Gloriastrasse 37 / 39, 8092, Zurich, Switzerland
| | | | - Thorarinn Gudjonsson
- Faculty of Medicine, University of Iceland, Vatnsmyrarvegur 16, 101 Reykjavik, Iceland
| | - Karin Wuertz-Kozak
- Department of Biomedical Engineering, Rochester Institute of Technology (RIT), 160 Lomb Memorial Drive Bldg. 73, Rochester, NY, 14623, USA
| |
Collapse
|
2
|
Guo S, Jiang Y, Jiao J, Shi Y, Zhu T, Li L. Electrospun gelatin-based biomimetic scaffold with spatially aligned and three-layer architectures for vascular tissue engineering. Int J Biol Macromol 2023:125039. [PMID: 37224900 DOI: 10.1016/j.ijbiomac.2023.125039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/10/2023] [Accepted: 05/21/2023] [Indexed: 05/26/2023]
Abstract
The spatial cellular alignment and multi-layer structure are vitally important for the physiological functions of natural blood vessels. However, the two features are difficult to be constructed in one scaffold simultaneously, especially in the small-diameter vascular scaffold. Here we report a general strategy to construct a gelatin-based biomimetic three-layer vascular scaffold with spatial alignment features mimicking the natural structure of blood vessels. By using a sequential electrospinning strategy combined with folding and rolling manipulation, a three-layer vascular scaffold with inner and middle layers spatially perpendicular to each other was obtained. The special features of this scaffold could fully mimic the natural multi-layer structures of blood vessels and also possess great potential for spatial arrangement guidance of corresponding cells in blood vessels.
Collapse
Affiliation(s)
- Shanzhu Guo
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, China
| | - Yue Jiang
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, China
| | - Jingjing Jiao
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, China
| | - Yan Shi
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, China
| | - Tao Zhu
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, China.
| | - Long Li
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou 550025, China.
| |
Collapse
|
3
|
Song JY, Lee HS, Kim DY, Yun HJ, Yi CC, Park SM. Fabrication Procedure for a 3D Hollow Nanofibrous Bifurcated-Tubular Scaffold by Conformal Electrospinning. ACS Macro Lett 2023; 12:659-666. [PMID: 37155320 DOI: 10.1021/acsmacrolett.3c00109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Electrospinning has shown great potential for the fabrication of 3D nanofibrous tubular scaffolds for bifurcated vascular grafts. However, fabrication of complex 3D nanofibrous tubular scaffolds with bifurcated or patient-specific shapes remains limited. In this study, a 3D hollow nanofibrous bifurcated-tubular scaffold was fabricated by the uniform and conformal deposition of electrospun nanofibers via conformal electrospinning. By conformal electrospinning, electrospun nanofibers are conformally deposited onto a complex shape, such as the bifurcated region, without large pores or defects. Owing to conformal electrospinning, a corner profile fidelity (FC), a measure of conformal deposition of electrospun nanofibers at the bifurcated region, was increased 4 times at the bifurcation angle (θB) of 60°, and all FC values of the scaffolds reached 100%, regardless of the θB. Furthermore, the thickness of the scaffolds could be controlled by varying the electrospinning time. Leakage-free liquid transfer was successfully achieved owing to the uniform and conformal deposition of electrospun nanofibers. Finally, the cytocompatibility and 3D mesh-based modeling of the scaffolds were demonstrated. Thus, conformal electrospinning can be used to fabricate leakage-free and complex 3D nanofibrous scaffolds for bifurcated vascular grafts.
Collapse
Affiliation(s)
- Jin Yeong Song
- School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 46241, South Korea
| | - Hyang Seob Lee
- School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 46241, South Korea
| | - Do Young Kim
- School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 46241, South Korea
| | - Hye Jin Yun
- Biomedical Research Institute, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan 49241, South Korea
| | - Changryul Claud Yi
- Biomedical Research Institute, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan 49241, South Korea
- Department of Plastic and Reconstructive Surgery, Pusan National University School of Medicine, 179 Gudeok-ro, Seo-gu, Busan 49241, South Korea
| | - Sang Min Park
- School of Mechanical Engineering, Pusan National University, 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 46241, South Korea
| |
Collapse
|
4
|
Łopianiak I, Rzempołuch W, Civelek M, Cicha I, Ciach T, Butruk-Raszeja BA. Multilayered blow-spun vascular prostheses with luminal surfaces in Nano/Micro range: the influence on endothelial cell and platelet adhesion. J Biol Eng 2023; 17:20. [PMID: 36915145 PMCID: PMC10012602 DOI: 10.1186/s13036-023-00337-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 03/05/2023] [Indexed: 03/14/2023] Open
Abstract
BACKGROUND In this study, two types of polyurethane-based cylindrical multilayered grafts with internal diameters ≤ 6 mm were produced by the solution blow spinning (SBS) method. The main aim was to create layered-wall prostheses differing in their luminal surface morphology. Changing the SBS process parameters, i.e. working distance, rotational speed, volume, and concentration of the polymer solution allowed to obtain structures with the required morphologies. The first type of prostheses, termed Nano, possessed nanofibrous luminal surface, and the second type, Micro, presented morphologically diverse luminal surface, with both solid and microfibrous areas. RESULTS The results of mechanical tests confirmed that designed prostheses had high flexibility (Young's modulus value of about 2.5 MPa) and good tensile strength (maximum axial load value of about 60 N), which meet the requirements for vascular prostheses. The influence of the luminal surface morphology on platelet adhesion and the attachment of endothelial cells was investigated. Both surfaces did not cause hemolysis in contact with blood, the percentage of platelet-occupied area for Nano and Micro surfaces was comparable to reference polytetrafluoroethylene (PTFE) surface. However, the change in morphology of surface-adhered platelets between Nano and Micro surfaces was visible, which might suggest differences in their activation level. Endothelial coverage after 1, 3, and 7 days of culture on flat samples (2D model) was higher on Nano prostheses as compared with Micro scaffolds. However, this effect was not seen in 3D culture, where cylindrical prostheses were colonized using magnetic seeding method. CONCLUSIONS We conclude the produced scaffolds meet the material and mechanical requirements for vascular prostheses. However, changing the morphology without changing the chemical modification of the luminal surface is not sufficient to achieve the appropriate effectiveness of endothelialization in the 3D model.
Collapse
Affiliation(s)
- Iwona Łopianiak
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645, Warsaw, Poland.,Doctoral School of Warsaw University of Technology, Warsaw University of Technology, Pl. Politechniki 1, 00-661, Warsaw, Poland
| | - Wiktoria Rzempołuch
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645, Warsaw, Poland
| | - Mehtap Civelek
- Section of Experimental Oncology Und Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung-Professorship, ENT-Department, Universitätsklinikum, Erlangen, Germany
| | - Iwona Cicha
- Section of Experimental Oncology Und Nanomedicine (SEON), Else Kröner-Fresenius-Stiftung-Professorship, ENT-Department, Universitätsklinikum, Erlangen, Germany
| | - Tomasz Ciach
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645, Warsaw, Poland.,Centre for Advanced Materials and Technologies CEZAMAT, Warsaw University of Technology, Poleczki 19, 02-822, Warsaw, Poland
| | - Beata A Butruk-Raszeja
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645, Warsaw, Poland.
| |
Collapse
|
5
|
Mansour A, Romani M, Acharya AB, Rahman B, Verron E, Badran Z. Drug Delivery Systems in Regenerative Medicine: An Updated Review. Pharmaceutics 2023; 15:pharmaceutics15020695. [PMID: 36840018 PMCID: PMC9967372 DOI: 10.3390/pharmaceutics15020695] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/15/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
Modern drug discovery methods led to evolving new agents with significant therapeutic potential. However, their properties, such as solubility and administration-related challenges, may hinder their benefits. Moreover, advances in biotechnology resulted in the development of a new generation of molecules with a short half-life that necessitates frequent administration. In this context, controlled release systems are required to enhance treatment efficacy and improve patient compliance. Innovative drug delivery systems are promising tools that protect therapeutic proteins and peptides against proteolytic degradation where controlled delivery is achievable. The present review provides an overview of different approaches used for drug delivery.
Collapse
Affiliation(s)
- Alaa Mansour
- Periodontology Unit, College of Dental Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Maya Romani
- Department of Family Medicine, Faculty of Medicine, American University of Beirut, Beirut 1107, Lebanon
| | | | - Betul Rahman
- Periodontology Unit, College of Dental Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
- Correspondence:
| | - Elise Verron
- CNRS, CEISAM, UMR 6230, Nantes Université, F-44000 Nantes, France
| | - Zahi Badran
- Periodontology Unit, College of Dental Medicine, University of Sharjah, Sharjah 27272, United Arab Emirates
| |
Collapse
|
6
|
Wang X, Chan V, Corridon PR. Acellular Tissue-Engineered Vascular Grafts from Polymers: Methods, Achievements, Characterization, and Challenges. Polymers (Basel) 2022; 14:polym14224825. [PMID: 36432950 PMCID: PMC9695055 DOI: 10.3390/polym14224825] [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: 09/28/2022] [Revised: 11/03/2022] [Accepted: 11/03/2022] [Indexed: 11/11/2022] Open
Abstract
Extensive and permanent damage to the vasculature leading to different pathogenesis calls for developing innovative therapeutics, including drugs, medical devices, and cell therapies. Innovative strategies to engineer bioartificial/biomimetic vessels have been extensively exploited as an effective replacement for vessels that have seriously malfunctioned. However, further studies in polymer chemistry, additive manufacturing, and rapid prototyping are required to generate highly engineered vascular segments that can be effectively integrated into the existing vasculature of patients. One recently developed approach involves designing and fabricating acellular vessel equivalents from novel polymeric materials. This review aims to assess the design criteria, engineering factors, and innovative approaches for the fabrication and characterization of biomimetic macro- and micro-scale vessels. At the same time, the engineering correlation between the physical properties of the polymer and biological functionalities of multiscale acellular vascular segments are thoroughly elucidated. Moreover, several emerging characterization techniques for probing the mechanical properties of tissue-engineered vascular grafts are revealed. Finally, significant challenges to the clinical transformation of the highly promising engineered vessels derived from polymers are identified, and unique perspectives on future research directions are presented.
Collapse
Affiliation(s)
- Xinyu Wang
- Department of Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
| | - Vincent Chan
- Department of Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- Correspondence: (V.C.); (P.R.C.)
| | - Peter R. Corridon
- Department of Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- Center for Biotechnology, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
- Correspondence: (V.C.); (P.R.C.)
| |
Collapse
|
7
|
Visser D, Bakhshi H, Rogg K, Fuhrmann E, Wieland F, Schenke-Layland K, Meyer W, Hartmann H. Green Chemistry for Biomimetic Materials: Synthesis and Electrospinning of High-Molecular-Weight Polycarbonate-Based Nonisocyanate Polyurethanes. ACS OMEGA 2022; 7:39772-39781. [PMID: 36385898 PMCID: PMC9648058 DOI: 10.1021/acsomega.2c03731] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 10/14/2022] [Indexed: 06/16/2023]
Abstract
Conventional synthesis routes for thermoplastic polyurethanes (TPUs) still require the use of isocyanates and tin-based catalysts, which pose considerable safety and environmental hazards. To reduce both the ecological footprint and human health dangers for nonwoven TPU scaffolds, it is key to establish a green synthesis route, which eliminates the use of these toxic compounds and results in biocompatible TPUs with facile processability. In this study, we developed high-molecular-weight nonisocyanate polyurethanes (NIPUs) through transurethanization of 1,6-hexanedicarbamate with polycarbonate diols (PCDLs). Various molecular weights of PCDL were employed to maximize the molecular weight of NIPUs and consequently facilitate their electrospinnability. The synthesized NIPUs were characterized by nuclear magnetic resonance, Fourier-transform infrared spectroscopy, gel permeation chromatography, and differential scanning calorimetry. The highest achieved molecular weight (M w) was 58,600 g/mol. The NIPUs were consecutively electrospun into fibrous scaffolds with fiber diameters in the submicron range, as shown by scanning electron microscopy (SEM). To assess the suitability of electrospun NIPU mats as a possible biomimetic load-bearing pericardial substitute in cardiac tissue engineering, their cytotoxicity was investigated in vitro using primary human fibroblasts and a human epithelial cell line. The bare NIPU mats did not need further biofunctionalization to enhance cell adhesion, as it was not outperformed by collagen-functionalized NIPU mats and hence showed that the NIPU mats possess a great potential for use in biomimetic scaffolds.
Collapse
Affiliation(s)
- Dmitri Visser
- NMI
Natural and Medical Science Institute at the University of Tübingen, Markwiesenstrasse 55, 72770 Reutlingen, Germany
| | - Hadi Bakhshi
- Department
of Life Science and Bioprocesses, Fraunhofer
Institute for Applied Polymer Research IAP, Geiselbergstraße 69, 14476 Potsdam, Germany
- Department
of Functional Polymer Systems, Fraunhofer
Institute for Applied Polymer Research IAP, Geiselbergstraße 69, 14476 Potsdam, Germany
| | - Katharina Rogg
- NMI
Natural and Medical Science Institute at the University of Tübingen, Markwiesenstrasse 55, 72770 Reutlingen, Germany
| | - Ellena Fuhrmann
- NMI
Natural and Medical Science Institute at the University of Tübingen, Markwiesenstrasse 55, 72770 Reutlingen, Germany
| | - Franziska Wieland
- Department
of Functional Polymer Systems, Fraunhofer
Institute for Applied Polymer Research IAP, Geiselbergstraße 69, 14476 Potsdam, Germany
| | - Katja Schenke-Layland
- NMI
Natural and Medical Science Institute at the University of Tübingen, Markwiesenstrasse 55, 72770 Reutlingen, Germany
- Institute
of Biomedical Engineering, Dept. for Medical Technologies and Regenerative
Medicine, Eberhard Karls University Tübingen, 72076 Tübingen, Germany
- Cluster
of Excellence iFIT (EXC 2180) “Image-Guided and Functionally
Instructed Tumor Therapies”, Eberhard
Karls University Tübingen, 72076 Tübingen, Germany
| | - Wolfdietrich Meyer
- Department
of Life Science and Bioprocesses, Fraunhofer
Institute for Applied Polymer Research IAP, Geiselbergstraße 69, 14476 Potsdam, Germany
- Department
of Functional Polymer Systems, Fraunhofer
Institute for Applied Polymer Research IAP, Geiselbergstraße 69, 14476 Potsdam, Germany
| | - Hanna Hartmann
- NMI
Natural and Medical Science Institute at the University of Tübingen, Markwiesenstrasse 55, 72770 Reutlingen, Germany
| |
Collapse
|
8
|
Huang C, Xu X, Fu J, Yu DG, Liu Y. Recent Progress in Electrospun Polyacrylonitrile Nanofiber-Based Wound Dressing. Polymers (Basel) 2022; 14:3266. [PMID: 36015523 PMCID: PMC9415690 DOI: 10.3390/polym14163266] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 07/31/2022] [Accepted: 08/08/2022] [Indexed: 02/07/2023] Open
Abstract
Bleeding control plays a very important role in worldwide healthcare, which also promotes research and development of wound dressings. The wound healing process involves four stages of hemostasis, inflammation, proliferation and remodeling, which is a complex process, and wound dressings play a huge role in it. Electrospinning technology is simple to operate. Electrospun nanofibers have a high specific surface area, high porosity, high oxygen permeability, and excellent mechanical properties, which show great utilization value in the manufacture of wound dressings. As one of the most popular reactive and functional synthetic polymers, polyacrylonitrile (PAN) is frequently explored to create nanofibers for a wide variety of applications. In recent years, researchers have invested in the application of PAN nanofibers in wound dressings. Research on spun nanofibers is reviewed, and future development directions and prospects of electrospun PAN nanofibers for wound dressings are proposed.
Collapse
Affiliation(s)
- Chang Huang
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Xizi Xu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Junhao Fu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Deng-Guang Yu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yanbo Liu
- School of Textile Science and Engineering, Wuhan Textile University, Wuhan 430200, China
| |
Collapse
|
9
|
|
10
|
Tang Y, Tian J, Li L, Huang L, Shen Q, Guo S, Jiang Y. Biomimetic Biphasic Electrospun Scaffold for Anterior Cruciate Ligament Tissue Engineering. Tissue Eng Regen Med 2021; 18:819-830. [PMID: 34355341 DOI: 10.1007/s13770-021-00376-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/17/2021] [Accepted: 07/09/2021] [Indexed: 10/20/2022] Open
Abstract
BACKGROUND Replacing damaged anterior cruciate ligaments (ACLs) with tissue-engineered artificial ligaments is challenging because ligament scaffolds must have a multiregional structure that can guide stem cell differentiation. Here, we designed a biphasic scaffold and evaluated its effect on human marrow mesenchymal stem cells (MSCs) under dynamic culture conditions as well as rat ACL reconstruction model in vivo. METHODS We designed a novel dual-phase electrospinning strategy wherein the scaffolds comprised randomly arranged phases at the two ends and an aligned phase in the middle. The morphological, mechanical properties and scaffold degradation were investigated. MSCs proliferation, adhesion, morphology and fibroblast markers were evaluated under dynamic culturing. This scaffold were tested if they could induce ligament formation using a rodent model in vivo. RESULTS Compared with other materials, poly(D,L-lactide-co-glycolide)/poly(ε-caprolactone) (PLGA/PCL) with mass ratio of 1:5 showed appropriate mechanical properties and biodegradability that matched ACLs. After 28 days of dynamic culturing, MSCs were fusiform oriented in the aligned phase and randomly arranged in a paving-stone-like morphology in the random phase. The increased expression of fibroblastic markers demonstrated that only the alignment of nanofibers worked with mechanical stimulation to promote effective fibroblast differentiation. This scaffold was a dense collagenous structure, and there was minimal difference in collagen direction in the orientation phase. CONCLUSION Dual-phase electrospun scaffolds had mechanical properties and degradability similar to those of ACLs. They promoted differences in the morphology of MSCs and induced fibroblast differentiation under dynamic culture conditions. Animal experiments showed that ligamentous tissue regenerated well and supported joint stability.
Collapse
Affiliation(s)
- Ya Tang
- Orthopedic Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China
| | - Jialiang Tian
- Orthopedic Department, Guizhou Provincial People's Hospital, Guiyang, Guizhou, China.
| | - Long Li
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| | - Lin Huang
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| | - Quan Shen
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| | - Shanzhu Guo
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| | - Yue Jiang
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| |
Collapse
|
11
|
Diep E, Schiffman JD. Encapsulating bacteria in alginate-based electrospun nanofibers. Biomater Sci 2021; 9:4364-4373. [PMID: 34128000 DOI: 10.1039/d0bm02205e] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Encapsulation technologies are imperative for the safe delivery of live bacteria into the gut where they regulate bodily functions and human health. In this study, we develop alginate-based nanofibers that could potentially serve as a biocompatible, edible probiotic delivery system. By systematically exploring the ratio of three components, the biopolymer alginate (SA), the carrier polymer poly(ethylene oxide) (PEO), and the FDA approved surfactant polysorbate 80 (PS80), the surface tension and conductivity of the precursor solutions were optimized to electrospin bead-free fibers with an average diameter of 167 ± 23 nm. Next, the optimized precursor solution (2.8/1.2/3 wt% of SA/PEO/PS80) was loaded with Escherichia coli (E. coli, 108 CFU mL-1), which served as our model bacterium. We determined that the bacteria in the precursor solution remained viable after passing through a typical electric field (∼1 kV cm-1) employed during electrospinning. This is because the microbes are pulled into a sink-like flow, which encapsulates them into the polymer nanofibers. Upon electrospinning the E. coli-loaded solutions, beads that were much smaller than the size of an E. coli were initially observed. To compensate for the addition of bacteria, the SA/PEO/PS80 weight ratio was reoptimized to be 2.5/1.5/3. Smooth fibers with bulges around the live microbes were formed, as confirmed using fluorescence and scanning electron microscopy. By dissolving and plating the nanofibers, we found that 2.74 × 105 CFU g-1 of live E. coli cells were contained within the alginate-based fibers. This work demonstrates the use of electrospinning to encapsulate live bacteria in alginate-based nanofibers for the potential delivery of probiotics to the gut.
Collapse
Affiliation(s)
- Emily Diep
- Department of Chemical Engineering, University of Massachusetts, Amherst, Amherst, Massachusetts 01003-9303, USA.
| | - Jessica D Schiffman
- Department of Chemical Engineering, University of Massachusetts, Amherst, Amherst, Massachusetts 01003-9303, USA.
| |
Collapse
|
12
|
Zhang B, Xu Y, Ma S, Wang L, Liu C, Xu W, Shi J, Qiao W, Yang H. Small-diameter polyurethane vascular graft with high strength and excellent compliance. J Mech Behav Biomed Mater 2021; 121:104614. [PMID: 34091151 DOI: 10.1016/j.jmbbm.2021.104614] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/23/2021] [Accepted: 05/27/2021] [Indexed: 11/30/2022]
Abstract
In this study, a polyurethane vascular graft with excellent strength and compliance for clinical application was designed and fabricated by preparing three small-diameter vascular graft layers via the textile techniques of wet spinning and knitting. The polyurethane filament that was fabricated by wet spinning formed the inner layer. The polyurethane tubular fabric was used as the middle layer. The outer layer was prepared by spraying polyurethane solution. The three layers of the polyurethane vascular graft have uniform wall thickness, high strength, excellent compliance, and good puncture resistance compared with clinical poly(ethylene terephthalate) (PET) and expanded polytetrafluoroethylene (ePTFE) vascular graft. Therefore, these layers can have potential clinical applications in the replacement of the conventional artificial vascular graft prepared from PET and ePTFE.
Collapse
Affiliation(s)
- Baocheng Zhang
- Department of Orthopaedics, General Hospital of Central Theater Command of PLA, Wuhan, 430070, PR China
| | - Yuan Xu
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, 430200, PR China
| | - Sitian Ma
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, 430200, PR China; College of Material Science and Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Linfeng Wang
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, 430200, PR China; College of Material Science and Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Changjun Liu
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, 430200, PR China; College of Material Science and Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Weilin Xu
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, 430200, PR China
| | - Jiawei Shi
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, PR China
| | - Weihua Qiao
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, PR China.
| | - Hongjun Yang
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, 430200, PR China; College of Material Science and Engineering, Wuhan Textile University, Wuhan, 430200, PR China.
| |
Collapse
|
13
|
Lepedda AJ, Nieddu G, Formato M, Baker MB, Fernández-Pérez J, Moroni L. Glycosaminoglycans: From Vascular Physiology to Tissue Engineering Applications. Front Chem 2021; 9:680836. [PMID: 34084767 PMCID: PMC8167061 DOI: 10.3389/fchem.2021.680836] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 05/03/2021] [Indexed: 12/27/2022] Open
Abstract
Cardiovascular diseases represent the number one cause of death globally, with atherosclerosis a major contributor. Despite the clinical need for functional arterial substitutes, success has been limited to arterial replacements of large-caliber vessels (diameter > 6 mm), leaving the bulk of demand unmet. In this respect, one of the most challenging goals in tissue engineering is to design a "bioactive" resorbable scaffold, analogous to the natural extracellular matrix (ECM), able to guide the process of vascular tissue regeneration. Besides adequate mechanical properties to sustain the hemodynamic flow forces, scaffold's properties should include biocompatibility, controlled biodegradability with non-toxic products, low inflammatory/thrombotic potential, porosity, and a specific combination of molecular signals allowing vascular cells to attach, proliferate and synthesize their own ECM. Different fabrication methods, such as phase separation, self-assembly and electrospinning are currently used to obtain nanofibrous scaffolds with a well-organized architecture and mechanical properties suitable for vascular tissue regeneration. However, several studies have shown that naked scaffolds, although fabricated with biocompatible polymers, represent a poor substrate to be populated by vascular cells. In this respect, surface functionalization with bioactive natural molecules, such as collagen, elastin, fibrinogen, silk fibroin, alginate, chitosan, dextran, glycosaminoglycans (GAGs), and growth factors has proven to be effective. GAGs are complex anionic unbranched heteropolysaccharides that represent major structural and functional ECM components of connective tissues. GAGs are very heterogeneous in terms of type of repeating disaccharide unit, relative molecular mass, charge density, degree and pattern of sulfation, degree of epimerization and physicochemical properties. These molecules participate in a number of vascular events such as the regulation of vascular permeability, lipid metabolism, hemostasis, and thrombosis, but also interact with vascular cells, growth factors, and cytokines to modulate cell adhesion, migration, and proliferation. The primary goal of this review is to perform a critical analysis of the last twenty-years of literature in which GAGs have been used as molecular cues, able to guide the processes leading to correct endothelialization and neo-artery formation, as well as to provide readers with an overall picture of their potential as functional molecules for small-diameter vascular regeneration.
Collapse
Affiliation(s)
| | - Gabriele Nieddu
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Marilena Formato
- Department of Biomedical Sciences, University of Sassari, Sassari, Italy
| | - Matthew Brandon Baker
- Complex Tissue Regeneration Department, MERLN Institute for Technology Inspired Regenerative Medicine, Maastricht, Netherlands
| | - Julia Fernández-Pérez
- Complex Tissue Regeneration Department, MERLN Institute for Technology Inspired Regenerative Medicine, Maastricht, Netherlands
| | - Lorenzo Moroni
- Complex Tissue Regeneration Department, MERLN Institute for Technology Inspired Regenerative Medicine, Maastricht, Netherlands
| |
Collapse
|
14
|
Maleckis K, Kamenskiy A, Lichter EZ, Oberley-Deegan R, Dzenis Y, MacTaggart J. Mechanically tuned vascular graft demonstrates rapid endothelialization and integration into the porcine iliac artery wall. Acta Biomater 2021; 125:126-137. [PMID: 33549808 DOI: 10.1016/j.actbio.2021.01.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 01/26/2021] [Accepted: 01/28/2021] [Indexed: 12/12/2022]
Abstract
Mechanical properties of vascular grafts likely play important roles in healing and tissue regeneration. Healthy arteries are compliant at low pressures but stiffen rapidly with increasing load, ensuring sufficient volumetric expansion without overstretching the vessel. Commercial synthetic vascular grafts are stiff and unable to expand under physiologic loads, which may result in altered hemodynamics, deleterious cellular responses, and compromised clinical performance. The goal of this study was to develop an Elastomeric Nanofibrillar Graft (ENG) with artery-tuned nonlinear compliance and compare its healing responses to conventional expanded polytetrafluoroethylene (ePTFE) grafts in a porcine iliac artery model. Human and porcine iliac arteries were mechanically characterized, and an ENG with similar properties was created by utilizing residual strains within electrospun nanofibers. The ENG was tested for implantation suitability and implanted onto n = 5 domestic swine iliac arteries, with control ePTFE grafts implanted onto the contralateral iliac arteries. After two weeks in vivo, all iliac arteries and grafts remained patent with no signs of thrombosis or dilation. The mechanically tuned ENG implants exhibited a more confluent CD31-positive cell monolayer (1.53 ± 0.73 µm2/mm vs 0.52 ± 0.55 µm2/mm, p = 0.042) on the graft lumenal surface and a higher fraction of αSMA-positive cells (16.2 ± 8.6% vs 1.4 ± 0.7%, p = 0.018) within the graft wall than the ePTFE controls. Despite heavy cellular infiltration, the ENG retained its artery-like mechanical characteristics after two weeks in vivo. These short-term results demonstrate potential advantages of mechanically tuned biomimetic vascular grafts over standard ePTFE grafts. STATEMENT OF SIGNIFICANCE: Off-the-shelf synthetic vascular grafts are often the only option available for treating advanced stages of vascular disease. Despite significant efforts devoted to improving their biochemical characteristics, synthetic peripheral arterial grafts continue to demonstrate poor clinical outcomes leading to costly reinterventions. Here, we hypothesized that a synthetic vascular graft with elastomeric mechanical properties tuned to a healthy peripheral artery promotes better healing responses than a synthetic stiff graft. To test this hypothesis, we developed an Elastomeric Nanofibrillar Graft (ENG) with artery-tuned mechanical properties and compared its performance to a commercial ePTFE graft in a preclinical porcine iliac artery model. Our results suggest that mechanically tuned ENGs can offer better healing responses, potentially leading to better clinical outcomes for peripheral arterial repairs.
Collapse
|
15
|
Estermann M, Spiaggia G, Septiadi D, Dijkhoff IM, Drasler B, Petri-Fink A, Rothen-Rutishauser B. Design of Perfused PTFE Vessel-Like Constructs for In Vitro Applications. Macromol Biosci 2021; 21:e2100016. [PMID: 33624920 DOI: 10.1002/mabi.202100016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Indexed: 12/18/2022]
Abstract
Tissue models mimic the complex 3D structure of human tissues, which allows the study of pathologies and the development of new therapeutic strategies. The introduction of perfusion overcomes the diffusion limitation and enables the formation of larger tissue constructs. Furthermore, it provides the possibility to investigate the effects of hematogenously administered medications. In this study, the applicability of hydrophilic polytetrafluoroethylene (PTFE) membranes as vessel-like constructs for further use in perfused tissue models is evaluated. The presented approach allows the formation of stable and leakproof tubes with a mean diameter of 654.7 µm and a wall thickness of 84.2 µm. A polydimethylsiloxane (PDMS) chip acts as a perfusion bioreactor and provides sterile conditions. As proof of concept, endothelial cells adhere to the tube's wall, express vascular endothelial cadherin (VE-cadherin) between neighboring cells, and resist perfusion at a shear rate of 0.036 N m-2 for 48 h. Furthermore, the endothelial cell layer delays significantly the diffusion of fluorescently labeled molecules into the surrounding collagen matrix and leads to a twofold reduced diffusion velocity. This approach represents a cost-effective alternative to introduce stable vessel-like constructs into tissue models, which allows adapting the surrounding matrix to the tissue properties in vivo.
Collapse
Affiliation(s)
- Manuela Estermann
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Giovanni Spiaggia
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Dedy Septiadi
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Irini Magdelina Dijkhoff
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Barbara Drasler
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland
| | - Alke Petri-Fink
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, Fribourg, 1700, Switzerland.,Department of Chemistry, University of Fribourg, Chemin du Museé 9, Fribourg, 1700, Switzerland
| | | |
Collapse
|
16
|
Abstract
One of the largest fields of application of electrospun materials is the biomedical field, including development of scaffolds for tissue engineering, drug delivery and wound healing. Electrospinning appears as a promising technique in terms of scaffolds composition and architecture, which is the main aspect of this review paper, with a special attention to natural polymers including collagen, fibrinogen, silk fibroin, chitosan, chitin etc. Thanks to the adaptability of the electrospinning process, versatile hybrid, custom tailored structure scaffolds have been reported. The same is achieved due to the vast biomaterials’ processability as well as modifications of the basic electrospinning set-up and its combination with other techniques, simultaneously or by post-processing.
Collapse
|
17
|
Yang L, Li X, Wu Y, Du P, Sun L, Yu Z, Song S, Yin J, Ma X, Jing C, Zhao J, Chen H, Dong Y, Zhang Q, Zhao L. Preparation of PU/Fibrin Vascular Scaffold with Good Biomechanical Properties and Evaluation of Its Performance in vitro and in vivo. Int J Nanomedicine 2020; 15:8697-8715. [PMID: 33192062 PMCID: PMC7656973 DOI: 10.2147/ijn.s274459] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 09/25/2020] [Indexed: 01/22/2023] Open
Abstract
PURPOSE The development of tissue-engineered blood vessels provides a new source of donors for coronary artery bypass grafting and peripheral blood vessel transplantation. Fibrin fiber has good biocompatibility and is an ideal tissue engineering vascular scaffold, but its mechanical property needs improvement. METHODS We mixed polyurethane (PU) and fibrin to prepare the PU/fibrin vascular scaffolds by using electrospinning technology in order to enhance the mechanical properties of fibrin scaffold. We investigated the morphological, mechanical strength, hydrophilicity, degradation, blood and cell compatibility of PU/fibrin (0:100), PU/fibrin (5:95), PU/fibrin (15:85) and PU/fibrin (25:75) vascular scaffolds. Based on the results in vitro, PU/fibrin (15:85) was selected for transplantation in vivo to repair vascular defects, and the extracellular matrix formation, vascular remodeling, and immune response were evaluated. RESULTS The results indicated that the fiber diameter of the PU/fibrin (15:85) scaffold was about 712nm. With the increase of PU content, the mechanical strength of the composite scaffolds increased, however, the degradation rate decreased gradually. The PU/fibrin scaffold showed good hydrophilicity and hemocompatibility. PU/fibrin (15:85) vascular scaffold could promote the adhesion and proliferation of mesenchymal stromal cells (MSCs). Quantitative RT-PCR experimental results showed that the expression of collagen, survivin and vimentin genes in PU/fibrin (15:85) was higher than that in PU/fibrin (25:75). The results in vivo indicated the mechanical properties and compliance of PU/fibrin grafts could meet clinical requirements and the proportion of thrombosis or occlusion was significantly lower. The graft showed strong vasomotor response, and the smooth muscle cells, endothelial cells, and ECM deposition of the neoartery were comparable to that of native artery after 3 months. At 3 months, the amount of macrophages in PU/fibrin grafts was significantly lower, and the secretion of pro-inflammatory and anti-inflammatory cytokines decreased. CONCLUSION PU/fibrin (15:85) vascular scaffolds had great potential to be used as small-diameter tissue engineering blood vessels.
Collapse
Affiliation(s)
- Lei Yang
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, People’s Republic of China
- Department of Orthopedics, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Xiafei Li
- College of Medical Engineering, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Yiting Wu
- Xiacun Community Health Service Center, Shenzhen Hospital, University of Chinese Academy of Sciences, Shenzhen, People’s Republic of China
| | - Pengchong Du
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, People’s Republic of China
- Department of Cardio-Thoracic Surgery, Third Affiliated Hospital, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Lulu Sun
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Zhenyang Yu
- Department of Orthopedics, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Shuang Song
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Jianshen Yin
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Xianfen Ma
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Changqin Jing
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Junqiang Zhao
- College of Medical Engineering, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Hongli Chen
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Yuzhen Dong
- Department of Orthopedics, First Affiliated Hospital, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Qiqing Zhang
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, People’s Republic of China
| | - Liang Zhao
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, People’s Republic of China
- Key Laboratory of Cardiac Structure Research, Zhengzhou Seventh People’s Hospital, Zhengzhou, People’s Republic of China
- The Central Lab, The Third People’s Hospital of Datong, Datong, People’s Republic of China
| |
Collapse
|
18
|
Nath NN, Pocivavsek L, Pugar JA, Gao Y, Salem K, Pitre N, McEnaney R, Velankar S, Tzeng E. Dynamic Luminal Topography: A Potential Strategy to Prevent Vascular Graft Thrombosis. Front Bioeng Biotechnol 2020; 8:573400. [PMID: 32984298 PMCID: PMC7487362 DOI: 10.3389/fbioe.2020.573400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 08/12/2020] [Indexed: 11/27/2022] Open
Abstract
Aim Biologic interfaces play important roles in tissue function. The vascular lumen-blood interface represents a surface where dynamic interactions between the endothelium and circulating blood cells are critical in preventing thrombosis. The arterial lumen possesses a uniform wrinkled surface determined by the underlying internal elastic lamina. The function of this structure is not known, but computational analyses of artificial surfaces with dynamic topography, oscillating between smooth and wrinkled configurations, support the ability of this surface structure to shed adherent material (Genzer and Groenewold, 2006; Bixler and Bhushan, 2012; Li et al., 2014). We hypothesized that incorporating a luminal surface capable of cyclical wrinkling/flattening during the cardiac cycle into vascular graft technology may represent a novel mechanism of resisting platelet adhesion and thrombosis. Methods and Results Bilayer silicone grafts possessing luminal corrugations that cyclically wrinkle and flatten during pulsatile flow were fabricated based on material strain mismatch. When placed into a pulsatile flow circuit with activated platelets, these grafts exhibited significantly reduced platelet deposition compared to grafts with smooth luminal surfaces. Constrained wrinkled grafts with static topography during pulsatile flow were more susceptible to platelet accumulation than dynamic wrinkled grafts and behaved similar to the smooth grafts under pulsatile flow. Wrinkled grafts under continuous flow conditions also exhibited marked increases in platelet accumulation. Conclusion These findings provide evidence that grafts with dynamic luminal topography resist platelet accumulation and support the application of this structure in vascular graft technology to improve the performance of prosthetic grafts. They also suggest that this corrugated structure in arteries may represent an inherent, self-cleaning mechanism in the vasculature.
Collapse
Affiliation(s)
- Nandan N Nath
- Division of Vascular Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, United States
| | - Luka Pocivavsek
- Division of Vascular Surgery, The University of Chicago, Chicago, IL, United States
| | - Joseph A Pugar
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA, United States
| | - Ya Gao
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA, United States
| | - Karim Salem
- Division of Vascular Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, United States
| | - Nandan Pitre
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, United States
| | - Ryan McEnaney
- Division of Vascular Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, United States.,VA Pittsburgh Healthcare Systems, Pittsburgh, PA, United States
| | - Sachin Velankar
- Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA, United States.,Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, United States
| | - Edith Tzeng
- Division of Vascular Surgery, University of Pittsburgh Medical Center, Pittsburgh, PA, United States.,VA Pittsburgh Healthcare Systems, Pittsburgh, PA, United States
| |
Collapse
|
19
|
Hagen MW, Hinds MT. The Effects of Topographic Micropatterning on Endothelial Colony-Forming Cells. Tissue Eng Part A 2020; 27:270-281. [PMID: 32600119 DOI: 10.1089/ten.tea.2020.0066] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Artificial small-diameter vascular grafts remain an unmet need in modern medicine, due to the thrombosis and neointimal hyperplasia that plague currently available synthetic devices. Tissue engineering techniques, including in vitro endothelialization, could offer a solution to this problem. A potential minimally invasive source of patient autologous endothelium is endothelial colony-forming cells (ECFCs), endothelial-like outgrowth products of circulating progenitors. While ECFCs respond to shear stress similar to mature endothelial cells (ECs), their response to luminal topographic micropatterning (TMP), a biomaterial modification with the potential to flow-independently, enhance the attachment, migration, gene expression, and function of mature ECs, remains unstudied. In this study, case-matched carotid endothelial cells (CaECs) and blood-derived ECFCs are statically cultured on polyurethane substrates with micropatterned pitches (pitch = peak to peak distance) ranging from 3-to 14 μm. On all pattern pitches tested, both CaECs and ECFCs showed significant and robust alignment to the angle of the micropatterns. Using a novel cell-by-cell image analysis technique, it was found that actin fibers similarly and significantly aligned to the angle of micropatterned features on all pitches tested. Microtubules analyzed through the same novel approach showed significant alignment on most pitches examined, with a greater variation in fiber angle overall. Interestingly, only CaECs showed significant cellular elongation, and notably to a lower degree than previously seen either in vivo due to flow or in vitro due to spatial growth restriction micropatterning, but consistent with earlier studies of TMP. Neither cell type displayed any significant micropattern-driven changes in the expression of KLF-2 or the downstream adhesion molecules it regulates. These results demonstrate that TMP flow-independently affects ECFC morphology, but that alignment alone is insufficient to drive protective changes in EC and ECFC function.
Collapse
Affiliation(s)
- Matthew W Hagen
- Knight Cardiovascular Institute, Oregon Health and Science University, Portland, Oregon, USA.,Work was performed at Oregon Health and Science University, Portland, Oregon, USA
| | - Monica T Hinds
- Department of Biomedical Engineering, Oregon Health and Science University, Portland, Oregon, USA.,Work was performed at Oregon Health and Science University, Portland, Oregon, USA
| |
Collapse
|
20
|
Patel H, Vohra Y, Singh R, Thomas V. HuBiogel incorporated fibro-porous hybrid nanomatrix graft for vascular tissue interfaces. MATERIALS TODAY. CHEMISTRY 2020; 17:100323. [PMID: 33015427 PMCID: PMC7526799 DOI: 10.1016/j.mtchem.2020.100323] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Native extracellular matrix (ECM) possesses the biochemical cues to promote cell survival. However, decellularized, the ECM loses its cell supporting mechanical integrity. We report, here, a novel biohybrid vascular graft of polycaprolactone (PCL), poliglecaprone (PGC) incorporated with human biomatrix as functional materials for vascular tissue interfacing by electrospinning, thus harnessing the biochemical cues from the ECM and the mechanical integrity of the polymer blends. The fabricated fibro-porous tubular small diameter graft (i.d. = 4 mm) from polymer blend was coated with a cocktail of collagenous matrix derived from human placenta called HuBiogel™. The compositional, morphological, and mechanical properties of graft were measured and compared with a non-coated tubular PCL/PGC graft using Fourier Transform infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). BCA assay was used to calculate the protein content and coating-uniformity throughout the hybrid graft. Mechanical properties such as tensile strength (1.6 MPa), Young's modulus (2.4 MPa), burst pressure (>1900 mmHg), and suture retention strength (2.3 N) of hybrid graft were found to be comparable to native blood vessels. Protein coating has improved the hydrophilicity and the biocompatibility (cell viability and cell-attachment) enhanced with human umbilical vein endothelial cells (HUVECs) seeded in vitro onto the lumen layer of the graft over two weeks. The overall results promise this new biohybrid graft to be a potential candidate for vascular tissue interface and regeneration.
Collapse
Affiliation(s)
- H.N. Patel
- Department of Biomedical Engineering, University of Alabama at Birmingham (UAB), Birmingham, AL, 35294, USA
| | - Y.K. Vohra
- Center for Nanoscale Materials and Biointegration (CNMB), University of Alabama at Birmingham (UAB), Birmingham, AL, 35294, USA
| | - R. Singh
- Department of Medicine, University of Alabama at Birmingham (UAB), Birmingham, AL, 35294, USA
- Vivo Biosciences Inc., Birmingham, AL, 35205, USA
| | - V. Thomas
- Department of Biomedical Engineering, University of Alabama at Birmingham (UAB), Birmingham, AL, 35294, USA
- Center for Nanoscale Materials and Biointegration (CNMB), University of Alabama at Birmingham (UAB), Birmingham, AL, 35294, USA
- Department of Materials Science and Engineering, University of Alabama at Birmingham (UAB), Birmingham, AL, 35294, USA
- Corresponding author. (V. Thomas)
| |
Collapse
|
21
|
Cavo M, Serio F, Kale NR, D'Amone E, Gigli G, Del Mercato LL. Electrospun nanofibers in cancer research: from engineering of in vitro 3D cancer models to therapy. Biomater Sci 2020; 8:4887-4905. [PMID: 32830832 DOI: 10.1039/d0bm00390e] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Electrospinning is historically related to tissue engineering due to its ability to produce nano-/microscale fibrous materials with mechanical and functional properties that are extremely similar to those of the extracellular matrix of living tissues. The general interest in electrospun fibrous matrices has recently expanded to cancer research both as scaffolds for in vitro cancer modelling and as patches for in vivo therapeutic delivery. In this review, we examine electrospinning by providing a brief description of the process and overview of most materials used in this process, discussing the effect of changing the process parameters on fiber conformations and assemblies. Then, we describe two different applications of electrospinning in service of cancer research: firstly, as three-dimensional (3D) fibrous materials for generating in vitro pre-clinical cancer models; and secondly, as patches encapsulating anticancer agents for in vivo delivery.
Collapse
Affiliation(s)
- Marta Cavo
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), c/o Campus Ecotekne, via Monteroni, 73100, Lecce, Italy.
| | | | | | | | | | | |
Collapse
|
22
|
Almonacid Suarez AM, van der Ham I, Brinker MG, van Rijn P, Harmsen MC. Topography-driven alterations in endothelial cell phenotype and contact guidance. Heliyon 2020; 6:e04329. [PMID: 32637708 PMCID: PMC7330714 DOI: 10.1016/j.heliyon.2020.e04329] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 06/18/2020] [Accepted: 06/24/2020] [Indexed: 12/16/2022] Open
Abstract
Understanding how endothelial cell phenotype is affected by topography could improve the design of new tools for tissue engineering as many tissue engineering approaches make use of topography-mediated cell stimulation. Therefore, we cultured human pulmonary microvascular endothelial cells (ECs) on a directional topographical gradient to screen the EC vascular-like network formation and alignment response to nano to microsized topographies. The cell response was evaluated by microscopy. We found that ECs formed unstable vascular-like networks that aggregated in the smaller topographies and flat parts whereas ECs themselves aligned on the larger topographies. Subsequently, we designed a mixed topography where we could explore the network formation and proliferative properties of these ECs by live imaging for three days. Vascular-like network formation continued to be unstable on the topography and were only produced on the flat areas and a fibronectin coating did not improve the network stability. However, an instructive adipose tissue-derived stromal cell (ASC) coating provided the correct environment to sustain the vascular-like networks, which were still affected by the topography underneath. It was concluded that large microsized topographies inhibit vascular endothelial network formation but not proliferation and flat and nano/microsized topographies allow formation of early networks that can be stabilized by using an ASC instructive layer.
Collapse
Affiliation(s)
- Ana Maria Almonacid Suarez
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Hanzeplein 1 (EA11), 9713 GZ, Groningen, the Netherlands
| | - Iris van der Ham
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Hanzeplein 1 (EA11), 9713 GZ, Groningen, the Netherlands
| | - Marja G.L. Brinker
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Hanzeplein 1 (EA11), 9713 GZ, Groningen, the Netherlands
| | - Patrick van Rijn
- University of Groningen, University Medical Center Groningen, Department of Biomedical Engineering-FB40, W.J. Kolff Institute for Biomedical Engineering and Materials Science-FB41, A. Deusinglaan 1, 9713 AV, Groningen, the Netherlands
| | - Martin C. Harmsen
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Hanzeplein 1 (EA11), 9713 GZ, Groningen, the Netherlands
| |
Collapse
|
23
|
Hung HS, Hsu SH. Surface Modification by Nanobiomaterials for Vascular Tissue Engineering Applications. Curr Med Chem 2020; 27:1634-1646. [DOI: 10.2174/0929867325666180914104633] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Revised: 05/17/2017] [Accepted: 06/16/2017] [Indexed: 12/13/2022]
Abstract
Treatment of cardiovascular disease has achieved great success using artificial implants,
particularly synthetic-polymer made grafts. However, thrombus formation and
restenosis are the current clinical problems need to be conquered. New biomaterials, modifying
the surface of synthetic vascular grafts, have been created to improve long-term patency
for the better hemocompatibility. The vascular biomaterials can be fabricated from synthetic
or natural polymers for vascular tissue engineering. Stem cells can be seeded by different
techniques into tissue-engineered vascular grafts in vitro and implanted in vivo to repair the
vascular tissues. To overcome the thrombogenesis and promote the endothelialization
effect, vascular biomaterials employing nanotopography are more bio-mimic to the native tissue
made and have been engineered by various approaches such as prepared as a simple surface
coating on the vascular biomaterials. It has now become an important and interesting
field to find novel approaches to better endothelization of vascular biomaterials. In this article,
we focus to review the techniques with better potential improving endothelization and summarize
for vascular biomaterial application. This review article will enable the development
of biomaterials with a high degree of originality, innovative research on novel techniques for
surface fabrication for vascular biomaterials application.
Collapse
Affiliation(s)
- Huey-Shan Hung
- Graduate Institute of Biomedical Science, China Medical University, Taichung, Taiwan, China
| | - Shan-hui Hsu
- Institute of Polymer Science and Engineering, National Taiwan University, Taipei, Taiwan, China
| |
Collapse
|
24
|
Topography elicits distinct phenotypes and functions in human primary and stem cell derived endothelial cells. Biomaterials 2020; 234:119747. [PMID: 31951971 DOI: 10.1016/j.biomaterials.2019.119747] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 11/25/2019] [Accepted: 12/25/2019] [Indexed: 12/20/2022]
Abstract
The effective deployment of arterial (AECs), venous (VECs) and stem cell-derived endothelial cells (PSC-ECs) in clinical applications requires understanding of their distinctive phenotypic and functional characteristics, including their responses to microenvironmental cues. Efforts to mimic the in-vivo vascular basement membrane milieu have led to the design and fabrication of nano- and micro-topographical substrates. Although the basement membrane architectures of arteries and veins are different, investigations into the effects of substrate topographies have so far focused on generic EC characteristics. Thus, topographical modulation of arterial- or venous-specific EC phenotype and function remains unknown. Here, we comprehensively evaluated the effects of 16 unique topographies on primary AECs, VECs and human PSC-ECs using a Multi Architectural (MARC) Chip. Gratings and micro-lenses augmented venous-specific phenotypes and depressed arterial functions in VECs; while AECs did not respond consistently to topography. PSC-ECs exhibited phenotypic and functional maturation towards an arterial subtype with increased angiogenic potential, NOTCH1 and Ac-LDL expression on gratings. Specific topographies could elicit different phenotypic and functional changes, despite similar morphological response in different ECs, demonstrating no direct correlation between the two responses.
Collapse
|
25
|
Li X, Huang L, Li L, Tang Y, Liu Q, Xie H, Tian J, Zhou S, Tang G. Biomimetic dual-oriented/bilayered electrospun scaffold for vascular tissue engineering. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 31:439-455. [DOI: 10.1080/09205063.2019.1697171] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Xingmao Li
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| | - Lin Huang
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| | - Long Li
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| | - Ya Tang
- Medical College, Guizhou University, Guiyang, Guizhou, China
| | - Qibin Liu
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| | - Haibo Xie
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| | - Jialiang Tian
- Medical College, Guizhou University, Guiyang, Guizhou, China
| | - Shaobing Zhou
- Key Laboratory of Advanced Technologies of Material (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, China
| | - Geng Tang
- College of Materials and Metallurgy, Guizhou University, Guiyang, Guizhou, China
| |
Collapse
|
26
|
Asadpour S, Yeganeh H, Khademi F, Ghanbari H, Ai J. Resveratrol-loaded polyurethane nanofibrous scaffold: viability of endothelial and smooth muscle cells. Biomed Mater 2019; 15:015001. [DOI: 10.1088/1748-605x/ab4e23] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
27
|
Yuan H, Chen C, Liu Y, Lu T, Wu Z. Strategies in cell‐free tissue‐engineered vascular grafts. J Biomed Mater Res A 2019; 108:426-445. [PMID: 31657523 DOI: 10.1002/jbm.a.36825] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 10/10/2019] [Accepted: 10/11/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Haoyong Yuan
- Department of Cardiovascular surgery The Second Xiangya Hospital of Central South University Changsha Hunan China
| | - Chunyang Chen
- Department of Cardiovascular surgery The Second Xiangya Hospital of Central South University Changsha Hunan China
| | - Yuhong Liu
- Department of Cardiovascular surgery The Second Xiangya Hospital of Central South University Changsha Hunan China
| | - Ting Lu
- Department of Cardiovascular surgery The Second Xiangya Hospital of Central South University Changsha Hunan China
| | - Zhongshi Wu
- Department of Cardiovascular surgery The Second Xiangya Hospital of Central South University Changsha Hunan China
| |
Collapse
|
28
|
Wang Z, Liu C, Xiao Y, Gu X, Xu Y, Dong N, Zhang S, Qin Q, Wang J. Remodeling of a Cell-Free Vascular Graft with Nanolamellar Intima into a Neovessel. ACS NANO 2019; 13:10576-10586. [PMID: 31483602 DOI: 10.1021/acsnano.9b04704] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Advances in cardiovascular materials have brought us improved artificial vessels with larger diameters for reducing adverse responses that drive acute thrombosis and the associated complications. Nonetheless, the challenge is still considerable when applying these materials in small-diameter blood vessels. Here we report the biomimetic design of an acellular small-diameter vascular graft with specifically lamellar nanotopography on the luminal surface via a modified freeze-cast technique. The experimental findings verify that the well-designed nanolamellar structure is able to inhibit the adherence and activation of platelets, induce oriented growth of endothelial cells, and eventually remodel a neovessel to maintain long-term patency in vivo. Furthermore, the results of numerical simulations in physically mimetic conditions reveal that the regularly lamellar nanopattern can manipulate blood flow to reduce the flow disturbance compared with random topography. Our current work not only creates a freeze-cast small-diameter vascular graft that employs topographic architecture to direct the vascular cell fates for revasculature but also rekindles confidence in biophysical cues for modulating in situ tissue regeneration.
Collapse
Affiliation(s)
| | - Chungeng Liu
- Department of Cardiovascular Surgery, Union Hospital , Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430022 , China
| | - Yi Xiao
- College of Engineering and Computer Science , Australian National University , Canberra , Australian Capital Territory 2601 , Australia
| | | | | | - Nianguo Dong
- Department of Cardiovascular Surgery, Union Hospital , Tongji Medical College, Huazhong University of Science and Technology , Wuhan 430022 , China
| | | | - Qinghua Qin
- College of Engineering and Computer Science , Australian National University , Canberra , Australian Capital Territory 2601 , Australia
| | | |
Collapse
|
29
|
Charbonier FW, Zamani M, Huang NF. Endothelial Cell Mechanotransduction in the Dynamic Vascular Environment. ADVANCED BIOSYSTEMS 2019; 3:e1800252. [PMID: 31328152 PMCID: PMC6640152 DOI: 10.1002/adbi.201800252] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Indexed: 12/11/2022]
Abstract
The vascular endothelial cells (ECs) that line the inner layer of blood vessels are responsible for maintaining vascular homeostasis under physiological conditions. In the presence of disease or injury, ECs can become dysfunctional and contribute to a progressive decline in vascular health. ECs are constantly exposed to a variety of dynamic mechanical stimuli, including hemodynamic shear stress, pulsatile stretch, and passive signaling cues derived from the extracellular matrix. This review describes the molecular mechanisms by which ECs perceive and interpret these mechanical signals. The translational applications of mechanosensing are then discussed in the context of endothelial-to-mesenchymal transition and engineering of vascular grafts.
Collapse
Affiliation(s)
- Frank W. Charbonier
- Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305
| | - Maedeh Zamani
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, 94305
| | - Ngan F. Huang
- Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, 94305
- Veterans Affairs Palo Alto Health Care System, 3801 Miranda Avenue, Palo Alto, CA, 94304
- The Stanford Cardiovascular Institute, Stanford University, Stanford, CA, 94305
- Stanford University, 300 Pasteur Drive, MC 5407, Stanford, CA 94305-5407, USA
| |
Collapse
|
30
|
Wang J, Loye AM, Ketkaew J, Schroers J, Kyriakides TR. Hierarchical Micro- and Nanopatterning of Metallic Glass to Engineer Cellular Responses. ACS APPLIED BIO MATERIALS 2018. [DOI: 10.1021/acsabm.8b00007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jennie Wang
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, United States
- Department of Mechanical Engineering & Materials Science, Yale University, New Haven, Connecticut 06511, United States
| | - Ayomiposi M. Loye
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, United States
- Department of Biomedical Engineering, Yale University, New Haven, Connecticut 06511, United States
| | - Jittisa Ketkaew
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, United States
- Department of Mechanical Engineering & Materials Science, Yale University, New Haven, Connecticut 06511, United States
| | - Jan Schroers
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, United States
- Department of Mechanical Engineering & Materials Science, Yale University, New Haven, Connecticut 06511, United States
| | - Themis R. Kyriakides
- Center for Research on Interface Structures and Phenomena, Yale University, New Haven, Connecticut 06520, United States
- Department of Mechanical Engineering & Materials Science, Yale University, New Haven, Connecticut 06511, United States
- Department of Pathology, Yale University, New Haven, Connecticut 06511, United States
| |
Collapse
|
31
|
From nano to micro to macro: Electrospun hierarchically structured polymeric fibers for biomedical applications. Prog Polym Sci 2018. [DOI: 10.1016/j.progpolymsci.2017.12.003] [Citation(s) in RCA: 210] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
32
|
Hsieh YK, Hsu KP, Hsiao SK, Gorday KAV, Wang T, Wang J. Laser-pattern induced contact guidance in biodegradable microfluidic channels for vasculature regeneration. J Mater Chem B 2018; 6:3684-3691. [PMID: 32254831 DOI: 10.1039/c8tb00221e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The direct cell control by surface topographic patterns in the micrometer and nanometer range has been proven to be important for the maintenance of tissue structures. This study presents the application of direct laser writing to fabricate micro-gratings on the biodegradable material 1,3-diamino-2-hydroxypropane-co-polyol sebacate (APS). The 193 nm excimer laser is applied to form microgrooves with widths of 2 to 10 μm and depths of 400 to 2884 nm. Two kinds of cells, fibroblasts of the rabbit synoviocyte cell line (HIG-82) and endothelial cells of human umbilical vein endothelial cells (HUVECs), were cultured on the flat and patterned APS to evaluate the biocompatibility of APS as well as the influence of contact guidance for cellular behaviours, respectively. The results show that both HIG-82 and HUVECs grow actively on APS scaffolds with directional growth, which was observed through cell morphology and proliferation rate, indicating their applicability in tissue regeneration. HIG-82 was observed to exhibit directional growth with the highest cell spreading area and density on the scaffolds with 7 μm width and 1350-1500 nm depth of gratings. Meanwhile, high cell spreading area and cell density of HUVECs were observed on laser ablated APS with 5 μm gratings and at depths greater than 1485 nm. The proposed microgrooves on APS could significantly enhance the cell growth, adhesion and even promote selective cell proliferation, which poses potential application for further tissue engineering studies.
Collapse
Affiliation(s)
- Yi-Kong Hsieh
- Department of Chemical Engineering, National Tsing Hua University, 30013, Taiwan.
| | | | | | | | | | | |
Collapse
|
33
|
Yu E, Mi HY, Zhang J, Thomson JA, Turng LS. Development of biomimetic thermoplastic polyurethane/fibroin small-diameter vascular grafts via a novel electrospinning approach. J Biomed Mater Res A 2018; 106:985-996. [PMID: 29143442 PMCID: PMC5826852 DOI: 10.1002/jbm.a.36297] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 10/28/2017] [Accepted: 11/10/2017] [Indexed: 12/18/2022]
Abstract
A new electrospinning approach for fabricating vascular grafts with a layered, circumferentially aligned, and micro-wavy fibrous structure similar to natural elastic tissues has been developed. The customized electrospinning collector was able to generate wavy fibers using the dynamic "jump rope" collecting process, which also solved the sample removal problem for mandrel-type collectors. In this study, natural silk fibroin and synthetic thermoplastic polyurethane (TPU) were combined at different weight ratios to produce hybrid small-diameter vascular grafts. The purpose of combining these two materials was to leverage the bioactivity and tunable mechanical properties of these natural and synthetic materials. Results showed that the electrospun fiber morphology was highly influenced by the material compositions and solvents employed. All of the TPU/fibroin hybrid grafts had mechanical properties comparable to natural blood vessels. The circumferentially aligned and wavy biomimetic configuration provided the grafts with a sufficient toe region and the capacity for long-term usage under repeated dilatation and contraction. Cell culture tests with human endothelial cells (EC) also revealed high cell viability and good biocompatibility for these grafts. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 985-996, 2018.
Collapse
Affiliation(s)
- Emily Yu
- Department of Mechanical Engineering, University of Wisconsin–Madison, WI, USA, 53706
- Wisconsin Institute for Discovery, University of Wisconsin–Madison, WI, USA, 53715
| | - Hao-Yang Mi
- Department of Mechanical Engineering, University of Wisconsin–Madison, WI, USA, 53706
- Wisconsin Institute for Discovery, University of Wisconsin–Madison, WI, USA, 53715
- Department of Industrial Equipment and Control Engineering, South China University of Technology, Guangzhou, China
| | - Jue Zhang
- Morgridge Institute for Research, WI, USA, 53715
| | | | - Lih-Sheng Turng
- Department of Mechanical Engineering, University of Wisconsin–Madison, WI, USA, 53706
- Wisconsin Institute for Discovery, University of Wisconsin–Madison, WI, USA, 53715
| |
Collapse
|
34
|
Awad NK, Niu H, Ali U, Morsi YS, Lin T. Electrospun Fibrous Scaffolds for Small-Diameter Blood Vessels: A Review. MEMBRANES 2018; 8:E15. [PMID: 29509698 PMCID: PMC5872197 DOI: 10.3390/membranes8010015] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 01/31/2018] [Accepted: 02/28/2018] [Indexed: 11/24/2022]
Abstract
Small-diameter blood vessels (SDBVs) are still a challenging task to prepare due to the occurrence of thrombosis formation, intimal hyperplasia, and aneurysmal dilation. Electrospinning technique, as a promising tissue engineering approach, can fabricate polymer fibrous scaffolds that satisfy requirements on the construction of extracellular matrix (ECM) of native blood vessel and promote the adhesion, proliferation, and growth of cells. In this review, we summarize the polymers that are deployed for the fabrication of SDBVs and classify them into three categories, synthetic polymers, natural polymers, and hybrid polymers. Furthermore, the biomechanical properties and the biological activities of the electrospun SBVs including anti-thrombogenic ability and cell response are discussed. Polymer blends seem to be a strategic way to fabricate SDBVs because it combines both suitable biomechanical properties coming from synthetic polymers and favorable sites to cell attachment coming from natural polymers.
Collapse
Affiliation(s)
- Nasser K Awad
- Biomechanics and Tissue Engineering Group, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
- Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia.
- Electrochemistry and Corrosion Laboratory, National Research Centre, Dokki, Cairo 12422, Egypt.
| | - Haitao Niu
- Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia.
| | - Usman Ali
- Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia.
- College of Textile Engineering, Bahauddin Zakariya University, Multan 60800, Pakistan.
| | - Yosry S Morsi
- Biomechanics and Tissue Engineering Group, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
| | - Tong Lin
- Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia.
| |
Collapse
|
35
|
Gong X, Yao J, He H, Zhao X, Liu X, Zhao F, Sun Y, Fan Y. Combination of flow and micropattern alignment affecting flow-resistant endothelial cell adhesion. J Mech Behav Biomed Mater 2017; 74:11-20. [DOI: 10.1016/j.jmbbm.2017.04.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 04/25/2017] [Accepted: 04/27/2017] [Indexed: 11/24/2022]
|
36
|
Sultana T, Amirian J, Park C, Lee SJ, Lee BT. Preparation and characterization of polycaprolactone–polyethylene glycol methyl ether and polycaprolactone–chitosan electrospun mats potential for vascular tissue engineering. J Biomater Appl 2017; 32:648-662. [DOI: 10.1177/0885328217733849] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Recently, natural polymers are frequently comingled with synthetic polymers either by physical or chemical modification to prepare numerous tissue-engineered graft with promising biological function, strength, and stability. The aim of this study was to determine the efficiency for vascular tissue engineering of two distinctly different mats, one that comprised polycaprolactone–polyethylene glycol methyl ether and other that comprised polycaprolactone–chitosan. Nano/microfibrous mats prepared from electro-spinning were characterized for fiber diameter, porosity, wettability, and mechanical strength. Biological efficacy on both biodegradable mats was assessed by rat bone marrow mesenchymal stem cells, and polycaprolactone–polyethylene glycol methyl ether showed feasibility for use as an inner layer by inducing endothelial-specific gene expression and polycaprolactone–chitosan as an outer layer on dual layered without sacrificing tensile strength, small-diameter blood vessels. Therefore, scaffolds fabricated from this research could be potential sources for tissue-engineered vascular graft and could also overcome the well-known drawbacks, such as thrombogenicity and stenosis, in managing vascular disease.
Collapse
Affiliation(s)
- Tamanna Sultana
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University 366-1, Ssangyoung-Dong, Cheonan City, ChungCheonNam-Do, Republic of Korea
| | - Jhaleh Amirian
- Institute of Tissue Regeneration, Soonchunhyang University 366-1, Ssangyoung-Dong, Cheonan City, ChungCheonNam-Do, Republic of Korea
| | - Chanmi Park
- Institute of Tissue Regeneration, Soonchunhyang University 366-1, Ssangyoung-Dong, Cheonan City, ChungCheonNam-Do, Republic of Korea
| | - Seung Jin Lee
- Department of Thoracic and Cardiovascular Surgery, Soonchunhyang University Hospital, 31, 6-gil, Cheonan City, ChungCheonNam-Do, Republic of Korea
| | - Byong-Taek Lee
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University 366-1, Ssangyoung-Dong, Cheonan City, ChungCheonNam-Do, Republic of Korea
- Institute of Tissue Regeneration, Soonchunhyang University 366-1, Ssangyoung-Dong, Cheonan City, ChungCheonNam-Do, Republic of Korea
| |
Collapse
|
37
|
Comparative study of kerateine and keratose based composite nanofibers for biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 83:1-8. [PMID: 29208266 DOI: 10.1016/j.msec.2017.07.057] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 06/30/2017] [Accepted: 07/19/2017] [Indexed: 01/08/2023]
Abstract
In this work, two forms of keratins, kerateine (KR) and keratose (KO), were fabricated respectively into electrospun nanofibers by combination with polyurethane (PU). The differences of the structure and material properties between KR and KO based fibers were investigated by SEM observation, ATR-FTIR, XRD, contact angle, tensile test, in vitro degradation and cytocompatibility assay. The results indicated that the KR based nanofibers exhibited a higher tensile modulus, lower fracture strain and slower degradation rate, mainly due to the reformation of disulfide crosslinking between the regenerated cysteines in KR after the reductive extraction. The KO based nanofibers demonstrated a stronger hydrophilic property and higher water uptake ability due to the cysteic acid residues resulting from the oxidative extraction. Furthermore, the combination of keratins, regardless of KR or KO, could obviously improve the cytocompatibility of PU, especially in the cell attachment stage.
Collapse
|
38
|
Park JH, Rutledge GC. 50th Anniversary Perspective: Advanced Polymer Fibers: High Performance and Ultrafine. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00864] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jay Hoon Park
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, United States
| | - Gregory C. Rutledge
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, United States
| |
Collapse
|
39
|
|
40
|
Combined chemical and structural signals of biomaterials synergistically activate cell-cell communications for improving tissue regeneration. Acta Biomater 2017; 55:249-261. [PMID: 28377306 DOI: 10.1016/j.actbio.2017.03.056] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 02/24/2017] [Accepted: 03/31/2017] [Indexed: 01/20/2023]
Abstract
Biomaterials are only used as carriers of cells in the conventional tissue engineering. Considering the multi-cell environment and active cell-biomaterial interactions in tissue regeneration process, in this study, structural signals of aligned electrospun nanofibers and chemical signals of bioglass (BG) ionic products in cell culture medium are simultaneously applied to activate fibroblast-endothelial co-cultured cells in order to obtain an improved skin tissue engineering construct. Results demonstrate that the combined biomaterial signals synergistically activate fibroblast-endothelial co-culture skin tissue engineering constructs through promotion of paracrine effects and stimulation of gap junctional communication between cells, which results in enhanced vascularization and extracellular matrix protein synthesis in the constructs. Structural signals of aligned electrospun nanofibers play an important role in stimulating both of paracrine and gap junctional communication while chemical signals of BG ionic products mainly enhance paracrine effects. In vivo experiments reveal that the activated skin tissue engineering constructs significantly enhance wound healing as compared to control. This study indicates the advantages of synergistic effects between different bioactive signals of biomaterials can be taken to activate communication between different types of cells for obtaining tissue engineering constructs with improved functions. STATEMENT OF SIGNIFICANCE Tissue engineering can regenerate or replace tissue or organs through combining cells, biomaterials and growth factors. Normally, for repairing a specific tissue, only one type of cells, one kind of biomaterials, and specific growth factors are used to support cell growth. In this study, we proposed a novel tissue engineering approach by simply using co-cultured cells and combined biomaterial signals. Using a skin tissue engineering model, we successfully proved that the combined biomaterial signals such as surface nanostructures and bioactive ions could synergistically stimulate the cell-cell communication in co-culture system through paracrine effects and gap junction activation, and regulated expression of growth factors and extracellular matrix proteins, resulting in an activated tissue engineering constructs that significantly enhanced skin regeneration.
Collapse
|
41
|
Pezzoli D, Cauli E, Chevallier P, Farè S, Mantovani D. Biomimetic coating of cross-linked gelatin to improve mechanical and biological properties of electrospun PET: A promising approach for small caliber vascular graft applications. J Biomed Mater Res A 2017; 105:2405-2415. [DOI: 10.1002/jbm.a.36098] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Revised: 04/03/2017] [Accepted: 04/26/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Daniele Pezzoli
- Laboratory for Biomaterials and Bioengineering; CRC-I, Department of Mining, Metallurgical and Materials Engineering and CHU de Quebec Research Centre, Laval University; Quebec City QC G1L 3L5 Canada
| | - Elisa Cauli
- Department of Chemistry; Materials and Chemical Engineering “Giulio Natta”, Politecnico di Milano; Milan 20133 Italy
| | - Pascale Chevallier
- Laboratory for Biomaterials and Bioengineering; CRC-I, Department of Mining, Metallurgical and Materials Engineering and CHU de Quebec Research Centre, Laval University; Quebec City QC G1L 3L5 Canada
| | - Silvia Farè
- Laboratory for Biomaterials and Bioengineering; CRC-I, Department of Mining, Metallurgical and Materials Engineering and CHU de Quebec Research Centre, Laval University; Quebec City QC G1L 3L5 Canada
- Local Unit Politecnico di Milano; INSTM, Consorzio Nazionale di Scienza e Tecnologia dei Materiali; Milan Italy
| | - Diego Mantovani
- Laboratory for Biomaterials and Bioengineering; CRC-I, Department of Mining, Metallurgical and Materials Engineering and CHU de Quebec Research Centre, Laval University; Quebec City QC G1L 3L5 Canada
| |
Collapse
|
42
|
Duo X, Wang J, Li Q, Neve AL, Akpanyung M, Nejjari A, Ali ZSS, Feng Y, Zhang W, Shi C. CAGW Peptide Modified Biodegradable Cationic Copolymer for Effective Gene Delivery. Polymers (Basel) 2017; 9:E158. [PMID: 30970836 PMCID: PMC6432137 DOI: 10.3390/polym9050158] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 04/11/2017] [Accepted: 04/24/2017] [Indexed: 12/21/2022] Open
Abstract
In recent years, gene therapy has become a promising technology to enhance endothelialization of artificial vascular grafts. The ideal gene therapy requires a gene carrier with low cytotoxicity and high transfection efficiency. In this paper, we prepared a biodegradable cationic copolymer poly(d,l-lactide-co-glycolide)-graft-PEI (PLGA-g-PEI), grafted Cys-Ala-Gly-Trp (CAGW) peptide onto this copolymer via the thiol-ene Click-reaction, and then prepared micelles by a self-assembly method. pEGFP-ZNF580 plasmids (pDNA) were condensed by these micelles via electrostatic interaction to form gene complexes. The CAGW peptide enables these gene complexes with special recognition for endothelial cells, which could enhance their transfection. As a gene carrier system, the PLGA-g-PEI-g-CAGW/pDNA gene complexes were evaluated and the results showed that they had suitable diameter and zeta potential for cellular uptake, and exhibited low cytotoxicity and high transfection efficiency for EA.hy926 cells.
Collapse
Affiliation(s)
- Xinghong Duo
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
- School of Chemistry and Chemical Engineering, Qinghai University for Nationalities, Xining 810007, Qinghai, China.
| | - Jun Wang
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
| | - Qian Li
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
| | - Agnaldo Luis Neve
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
| | - Mary Akpanyung
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
| | - Abdelilah Nejjari
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
| | - Zaidi Syed Saqib Ali
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
| | - Yakai Feng
- School of Chemical Engineering and Technology, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
- Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin), Weijin Road 92, Tianjin 300072, China.
- Joint Laboratory for Biomaterials and Regenerative Medicine, Tianjin University-Helmholtz-Zentrum Geesthacht, Yaguan Road 135, Tianjin 300350, China.
- Key Laboratory of Systems Bioengineering of Ministry of Education, Tianjin University, Yaguan Road 135, Tianjin 300350, China.
| | - Wencheng Zhang
- Department of Physiology and Pathophysiology, Logistics University of Chinese People's Armed Police Force, Tianjin 300162, China.
| | - Changcan Shi
- Institute of Biomaterials and Engineering, Wenzhou Medical University, Wenzhou 325011, Zhejiang, China.
- Wenzhou Institute of Biomaterials and Engineering, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Wenzhou 325011, Zhejiang, China.
| |
Collapse
|
43
|
Zhuang Y, Zhang Q, Feng J, Wang N, Xu W, Yang H. The effect of native silk fibroin powder on the physical properties and biocompatibility of biomedical polyurethane membrane. Proc Inst Mech Eng H 2017; 231:337-346. [PMID: 28332447 DOI: 10.1177/0954411917697357] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Naturally derived fibers such as silk fibroin can potentially enhance the biocompatibility of currently used biomaterials. This study investigated the physical properties of native silk fibroin powder and its effect on the biocompatibility of biomedical polyurethane. Native silk fibroin powder with an average diameter of 3 µm was prepared on a purpose-built machine. A simple method of phase inversion was used to produce biomedical polyurethane/native silk fibroin powder hybrid membranes at different blend ratios by immersing a biomedical polyurethane/native silk fibroin powder solution in deionized water at room temperature. The physical properties of the membranes including morphology, hydrophilicity, roughness, porosity, and compressive modulus were characterized, and in vitro biocompatibility was evaluated by seeding the human umbilical vein endothelial cells on the top surface. Native silk fibroin powder had a concentration-dependent effect on the number and morphology of human umbilical vein endothelial cells growing on the membranes; cell number increased as native silk fibroin powder content in the biomedical polyurethane/native silk fibroin powder hybrid membrane was increased from 0% to 50%, and cell morphology changed from spindle-shaped to cobblestone-like as the native silk fibroin powder content was increased from 0% to 70%. The latter change was related to the physical characteristics of the membrane, including hydrophilicity, roughness, and mechanical properties. The in vivo biocompatibility of the native silk fibroin powder-modified biomedical polyurethane membrane was evaluated in a rat model; the histological analysis revealed no systemic toxicity. These results indicate that the biomedical polyurethane/native silk fibroin powder hybrid membrane has superior in vitro and in vivo biocompatibility relative to 100% biomedical polyurethane membranes and thus has potential applications in the fabrication of small-diameter vascular grafts and in tissue engineering.
Collapse
Affiliation(s)
- Yan Zhuang
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, China
| | - Qian Zhang
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, China
| | - Jinqi Feng
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, China
| | - Na Wang
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, China
| | - Weilin Xu
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, China
| | - Hongjun Yang
- Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education, Wuhan Textile University, Wuhan, China
| |
Collapse
|
44
|
Wang K, Wang X, Han C, Hou W, Wang J, Chen L, Luo Y. From Micro to Macro: The Hierarchical Design in a Micropatterned Scaffold for Cell Assembling and Transplantation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29. [PMID: 28066985 DOI: 10.1002/adma.201604600] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Revised: 09/21/2016] [Indexed: 05/09/2023]
Abstract
A microwell-patterned membranous scaffold that integrates nano- and microscale topographical characteristics based on polyurethane is fabricated for transplanting syngeneic islets and allogeneic mesenchymal stem cells into diabetic rodents. The scaffold effectively allows for assembling of single cells/microtissues, enables the transplantation of cells with spatial control, and improves the transplant's engraftment efficacy in vivo for treating diabetes.
Collapse
Affiliation(s)
- Kai Wang
- Department of Biomedical Engineering, Peking University, Beijing, 100871, China
| | - Xi Wang
- Department of Biomedical Engineering, Peking University, Beijing, 100871, China
| | - Chengsheng Han
- Institute of Molecular Medicine, Peking University, Beijing, 100871, China
| | - Wenda Hou
- Department of Biomedical Engineering, Peking University, Beijing, 100871, China
| | - Jinyang Wang
- Department of Biomedical Engineering, Peking University, Beijing, 100871, China
| | - Liangyi Chen
- Institute of Molecular Medicine, Peking University, Beijing, 100871, China
| | - Ying Luo
- Department of Biomedical Engineering, Peking University, Beijing, 100871, China
| |
Collapse
|
45
|
Tallawi M, Dippold D, Rai R, D'Atri D, Roether J, Schubert D, Rosellini E, Engel F, Boccaccini A. Novel PGS/PCL electrospun fiber mats with patterned topographical features for cardiac patch applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:569-76. [DOI: 10.1016/j.msec.2016.06.083] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 05/24/2016] [Accepted: 06/25/2016] [Indexed: 10/21/2022]
|
46
|
Cutiongco MFA, Goh SH, Aid-Launais R, Le Visage C, Low HY, Yim EKF. Planar and tubular patterning of micro and nano-topographies on poly(vinyl alcohol) hydrogel for improved endothelial cell responses. Biomaterials 2016; 84:184-195. [PMID: 26828683 DOI: 10.1016/j.biomaterials.2016.01.036] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 01/12/2016] [Accepted: 01/15/2016] [Indexed: 11/28/2022]
Abstract
Poly(vinyl alcohol) hydrogel (PVA) is a widely used material for biomedical devices, yet there is a need to enhance its biological functionality for in vitro and in vivo vascular application. Significance of surface topography in modulating cellular behaviour is increasingly evident. However, hydrogel patterning remains challenging. Using a casting method, planar PVA were patterned with micro-sized features. To achieve higher patterning resolution, nanoimprint lithography with high pressure and temperature was used. In vitro experiment showed enhanced human endothelial cell (EC) density and adhesion on patterned PVA. Additional chemical modification via nitrogen gas plasma on patterned PVA further improved EC density and adhesion. Only EC monolayer grown on plasma modified PVA with 2 μm gratings and 1.8 μm concave lens exhibited expression of vascular endothelial cadherin, indicating EC functionality. Patterning of the luminal surface of tubular hydrogels is not widely explored. The study presents the first method for simultaneous tubular molding and luminal surface patterning of hydrogel. PVA graft with 2 μm gratings showed patency and endothelialization, while unpatterned grafts were occluded after 20 days in rat aorta. The reproducible, high yield and high-fidelity methods enable planar and tubular patterning of PVA and other hydrogels to be used for biomedical applications.
Collapse
Affiliation(s)
- Marie F A Cutiongco
- Department of Biomedical Engineering, National University of Singapore, Singapore; Mechanobiology Institute, National University of Singapore, Singapore
| | - Seok Hong Goh
- Department of Biomedical Engineering, National University of Singapore, Singapore; Institute of Materials Research and Engineering, Agency for Science, Technology and Research, Singapore
| | | | - Catherine Le Visage
- INSERM, U1148, Laboratory for Vascular Translational Science, Paris, France; INSERM, U791, Center for OstesArticular and Dental Tissue Engineering, Nantes, France
| | - Hong Yee Low
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research, Singapore; Engineering Product Development Cluster, Singapore University of Technology and Design, Singapore.
| | - Evelyn K F Yim
- Department of Biomedical Engineering, National University of Singapore, Singapore; Mechanobiology Institute, National University of Singapore, Singapore; Department of Surgery, National University of Singapore, Singapore; Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, N2L 3G1, Canada.
| |
Collapse
|
47
|
Pang JH, Farhatnia Y, Godarzi F, Tan A, Rajadas J, Cousins BG, Seifalian AM. In situ Endothelialization: Bioengineering Considerations to Translation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:6248-64. [PMID: 26460851 DOI: 10.1002/smll.201402579] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 06/14/2015] [Indexed: 05/10/2023]
Abstract
Improving patency rates of current cardiovascular implants remains a major challenge. It is widely accepted that regeneration of a healthy endothelium layer on biomaterials could yield the perfect blood-contacting surface. Earlier efforts in pre-seeding endothelial cells in vitro demonstrated success in enhancing patency, but translation to the clinic is largely hampered due to its impracticality. In situ endothelialization, which aims to create biomaterial surfaces capable of self-endothelializing upon implantation, appears to be an extremely promising solution, particularly with the utilization of endothelial progenitor cells (EPCs). Nevertheless, controlling cell behavior in situ using immobilized biomolecules or physical patterning can be complex, thus warranting careful consideration. This review aims to provide valuable insight into the rationale and recent developments in biomaterial strategies to enhance in situ endothelialization. In particular, a discussion on the important bio-/nanoengineering considerations and lessons learnt from clinical trials are presented to aid the future translation of this exciting paradigm.
Collapse
Affiliation(s)
- Jun Hon Pang
- Centre for Nanotechnology & Regenerative Medicine, Division of Surgery & Interventional Science, University College London (UCL), London, UK
| | - Yasmin Farhatnia
- Centre for Nanotechnology & Regenerative Medicine, Division of Surgery & Interventional Science, University College London (UCL), London, UK
| | - Fatemeh Godarzi
- Centre for Nanotechnology & Regenerative Medicine, Division of Surgery & Interventional Science, University College London (UCL), London, UK
| | - Aaron Tan
- Centre for Nanotechnology & Regenerative Medicine, Division of Surgery & Interventional Science, University College London (UCL), London, UK
- UCL Medical School, University College London (UCL), London, UK
- Biomaterials & Advanced Drug Delivery Laboratory, Stanford School of Medicine, Stanford University, Stanford, California, USA
| | - Jayakumar Rajadas
- Biomaterials & Advanced Drug Delivery Laboratory, Stanford School of Medicine, Stanford University, Stanford, California, USA
| | - Brian G Cousins
- Centre for Nanotechnology & Regenerative Medicine, Division of Surgery & Interventional Science, University College London (UCL), London, UK
| | - Alexander M Seifalian
- Centre for Nanotechnology & Regenerative Medicine, Division of Surgery & Interventional Science, University College London (UCL), London, UK
- Royal Free Hospital, London, UK
- NanoRegMed Ltd, London, UK
| |
Collapse
|
48
|
Yuan H, Zhou Q, Li B, Bao M, Lou X, Zhang Y. Direct printing of patterned three-dimensional ultrafine fibrous scaffolds by stable jet electrospinning for cellular ingrowth. Biofabrication 2015; 7:045004. [DOI: 10.1088/1758-5090/7/4/045004] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
49
|
Heo Y, Shin YM, Lee YB, Lim YM, Shin H. Effect of immobilized collagen type IV on biological properties of endothelial cells for the enhanced endothelialization of synthetic vascular graft materials. Colloids Surf B Biointerfaces 2015. [PMID: 26196092 DOI: 10.1016/j.colsurfb.2015.07.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Regeneration of healthy endothelium onto vascular graft materials is imperative for prevention of intimal hyperplasia and thrombogenesis. In this study, we investigated the effect of collagen type IV (COL-IV) immobilized onto electrospun nanofibers on modulation of endothelial cell (EC) function, as a potential signal to rapid endothelialization of vascular grafts. COL-IV is assembled in basement membrane underneath intimal layer and regulates morphogenesis of blood vessels. For immobilization of COL-IV, poly(l-lactic acid) (PLLA) nanofibers (PL) were prepared as a model vascular graft substrate, onto which acrylic acid (AAc) was then grafted by using gamma-ray irradiation. AAc graft was dependent on irradiation doses and AAc concentrations, which allowed us to select the condition of 5% (v/v) AAc and 10 kGy for further conjugation of COL-IV. COL-IV immobilization was proportionally controlled as a function of its concentration. Atomic force microscope (AFM) analysis qualitatively supported immobilization of COL-IV, demonstrating increase in root mean square roughness of the PL from 665.37 ± 13.20 nm to 1440.74 ± 33.24. However, the Young's modulus of nanofibers was retained as approximately 1 MPa, regardless of surface modification. The number of ECs attached on the nanofibers with immobilized COL-IV was significantly increased by 5 times (1052 ± 138 cells/mm(2)) from pristine PL (234 ± 41 cells/mm(2)). In addition, the effect of immobilized COL-IV was profound for enhancing proliferation and up-regulation of markers implicated in rapid endothelialization. Collectively, our results suggest that COL-IV immobilized onto electrospun PLLA nanofibers may serve as a promising instructive cue used in vascular graft materials.
Collapse
Affiliation(s)
- Yunhoe Heo
- Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, Seoul 133-791, Republic of Korea; BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team, Republic of Korea
| | - Young Min Shin
- Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Gumgugil, Jeongeup, Jeollabuk-do 580-185, Republic of Korea
| | - Yu Bin Lee
- Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, Seoul 133-791, Republic of Korea; BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team, Republic of Korea
| | - Youn Mook Lim
- Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Gumgugil, Jeongeup, Jeollabuk-do 580-185, Republic of Korea.
| | - Heungsoo Shin
- Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, Seoul 133-791, Republic of Korea; BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team, Republic of Korea.
| |
Collapse
|
50
|
Gu Y, Sun F, Xie X, Wu X, Zhang Z, Guidoin R, Fu Q, Zhong Y, Zhao C. Prenatal developmental safety of functional polyurethanes for cardiovascular implants. J Biomed Mater Res B Appl Biomater 2015; 104:606-14. [DOI: 10.1002/jbm.b.33431] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 03/20/2015] [Accepted: 04/07/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Yongjiang Gu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials and Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Fan Sun
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials and Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Xingyi Xie
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials and Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Xiangyang Wu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials and Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Ze Zhang
- Department of Surgery, Faculty of Medicine; Laval University, The Research Center of Saint-François d'Assise Hospital, CHU; Quebec City Quebec G1L 3L5 Canada
| | - Robert Guidoin
- Department of Surgery, Faculty of Medicine; Laval University, The Research Center of Saint-François d'Assise Hospital, CHU; Quebec City Quebec G1L 3L5 Canada
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials and Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Yinping Zhong
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials and Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| | - Changsheng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials and Engineering; Sichuan University; Chengdu Sichuan 610065 People's Republic of China
| |
Collapse
|