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Stanciugelu SI, Patrascu JM, Florescu S, Marian C. Sticky Bone as a New Type of Autologous Bone Grafting in Schatzker Type II Tibial Plateau Fracture Case Report. Life (Basel) 2024; 14:1042. [PMID: 39202784 PMCID: PMC11355391 DOI: 10.3390/life14081042] [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: 06/16/2024] [Revised: 08/15/2024] [Accepted: 08/17/2024] [Indexed: 09/03/2024] Open
Abstract
BACKGROUND Schatzker type II fractures usually need to be grafted. Autograft bone from the iliac crest represents the gold standard, but it comes with high rates of morbidity on the donor side. Sticky bone is one of the regenerative therapies that aims to find new solutions to treat bone defects and to overcome the limitation of conventional options regarding bone grafts, due to their content in growth factors, which offer osteo-induction and osteo-conduction properties. Notably, regenerative dentistry has been at the forefront of applying these products in bone regeneration, demonstrating that PRF produces a highly promising "sticky bone" when combined with bone chips. To the best of our knowledge, this grafting technique has not been used in the orthopedic field to date. METHODS The subject was a 53-year-old woman with a Schatzker type II tibial plateau fracture, for which a new autologous bone grafting technique, i.e., sticky bone, was used for the treatment of the fracture. RESULTS This case reports the effectiveness of sticky bone as autologous bone graft used in Shatzker type II tibial plateau fracture. As an indispensable component of regenerative medicine, it seems to be an ideal biologic graft with a fibrin-rich structure that provides effective treatment in impressed tibial plateau fractures. CONCLUSION Sticky bone showed promising results and should be considered in the future as an appropriate bone implant.
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Affiliation(s)
- Stefan Iulian Stanciugelu
- Doctoral School, “Victor Babes” University of Medicine and Pharmacy Timisoara, Eftimie Murgu Square 2, 300041 Timisoara, Romania;
- “Pius Brinzeu” Emergency Clinical County Hospital, Bld. Liviu Rebreanu, No. 156, 300723 Timisoara, Romania;
- Orthopedics II Research Center, “Pius Brinzeu” Emergency Clinical County Hospital, Bld. Liviu Rebreanu, No. 156, 300723 Timisoara, Romania
| | - Jenel Marian Patrascu
- Doctoral School, “Victor Babes” University of Medicine and Pharmacy Timisoara, Eftimie Murgu Square 2, 300041 Timisoara, Romania;
- Prof. Univ. Dr. Teodor Șora Research Centre, Timisoara, Eftimie Murgu Square 2, 300041 Timisoara, Romania
- Department of Orthopedics and Traumatology, “Victor Babes” University of Medicine and Pharmacy Timisoara, 300041 Timisoara, Romania
| | - Sorin Florescu
- “Pius Brinzeu” Emergency Clinical County Hospital, Bld. Liviu Rebreanu, No. 156, 300723 Timisoara, Romania;
- Prof. Univ. Dr. Teodor Șora Research Centre, Timisoara, Eftimie Murgu Square 2, 300041 Timisoara, Romania
- Department of Orthopedics and Traumatology, “Victor Babes” University of Medicine and Pharmacy Timisoara, 300041 Timisoara, Romania
| | - Catalin Marian
- Department of Biochemistry and Pharmacology, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square 2, 300041 Timisoara, Romania;
- Center for Complex Networks Science, “Victor Babes” University of Medicine and Pharmacy, Eftimie Murgu Square 2, 300041 Timisoara, Romania
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2
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Angaria N, Saini S, Hussain MS, Sharma S, Singh G, Khurana N, Kumar R. Natural polymer-based hydrogels: versatile biomaterials for biomedical applications. INT J POLYM MATER PO 2024:1-19. [DOI: 10.1080/00914037.2023.2301645] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 12/31/2023] [Indexed: 09/05/2024]
Affiliation(s)
- Neeti Angaria
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, India
| | - Sumant Saini
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, India
| | - Md. Sadique Hussain
- School of Pharmaceutical Sciences, Jaipur National University, Jaipur, India
| | - Sakshi Sharma
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, India
| | - Gurvinder Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, India
| | - Navneet Khurana
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, India
| | - Rajesh Kumar
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, India
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3
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Driever EG, Muntz I, Patel V, Adelmeijer J, Bernal W, Koenderink GH, Lisman T. Fibrin clots from patients with acute-on-chronic liver failure are weaker than those from healthy individuals and patients with sepsis without underlying liver disease. J Thromb Haemost 2023; 21:2747-2758. [PMID: 37336436 DOI: 10.1016/j.jtha.2023.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 05/09/2023] [Accepted: 06/04/2023] [Indexed: 06/21/2023]
Abstract
BACKGROUND Previous studies identified decreased clot permeability, without differences in fibrin fiber density in clots, from patients with cirrhosis compared with those from healthy controls (HCs). Fibrinogen hypersialylation could be the reason for this discrepancy. OBJECTIVES The aim of this work was to study mechanical properties of clots and reassess clot permeability in relation to hypersialylation in patients with stable cirrhosis, acute decompensation, and acute-on-chronic liver failure (ACLF). Sepsis patients without liver disease were included to distinguish between liver-specific and inflammation-driven phenotypes. METHODS Pooled plasma was used for rheology and permeability experiments. Permeability was assessed with compression using a rheometer and by liquid permeation. Purified fibrinogen treated with neuraminidase was used to study the effects of fibrinogen hypersialylation on liquid permeation. RESULTS Mechanical properties of clots from patients with stable cirrhosis and acute decompensation were similar to those of clots from HCs, but clots from patients with ACLF were softer and ruptured at lower shear stress. Clots from sepsis patients without liver disease were stiffer than those from the other groups, but this effect disappeared after adjusting for increased plasma fibrinogen concentrations. Permeability was similar between clots under compression from HCs and clots under compression from patients but decreased with increasing disease severity in liquid permeation. Removal of fibrinogen sialic acid residues increased permeability more in patients than in controls. CONCLUSION Clots from patients with ACLF have weak mechanical properties despite unaltered fibrin fiber density. Previous liquid permeation experiments may have erroneously concluded that clots from patients with ACLF are prothrombotic as fibrinogen hypersialylation leads to underestimation of clot permeability in this setting, presumably due to enhanced water retention.
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Affiliation(s)
- Ellen G Driever
- Surgical Research Laboratory, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Iain Muntz
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Delft, the Netherlands
| | - Vishal Patel
- Institute of Liver Studies, King's College Hospital NHS Foundation Trust, London, United Kingdom
| | - Jelle Adelmeijer
- Surgical Research Laboratory, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - William Bernal
- Institute of Liver Studies, King's College Hospital NHS Foundation Trust, London, United Kingdom
| | - Gijsje H Koenderink
- Department of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Delft, the Netherlands.
| | - Ton Lisman
- Surgical Research Laboratory, Department of Surgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands.
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4
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Aziz R, Falanga M, Purenovic J, Mancini S, Lamberti P, Guida M. A Review on the Applications of Natural Biodegradable Nano Polymers in Cardiac Tissue Engineering. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1374. [PMID: 37110959 PMCID: PMC10145986 DOI: 10.3390/nano13081374] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 06/19/2023]
Abstract
As cardiac diseases, which mostly result in heart failure, are increasing rapidly worldwide, heart transplantation seems the only solution for saving lives. However, this practice is not always possible due to several reasons, such as scarcity of donors, rejection of organs from recipient bodies, or costly medical procedures. In the framework of nanotechnology, nanomaterials greatly contribute to the development of these cardiovascular scaffolds as they provide an easy regeneration of the tissues. Currently, functional nanofibers can be used in the production of stem cells and in the regeneration of cells and tissues. The small size of nanomaterials, however, leads to changes in their chemical and physical characteristics that could alter their interaction and exposure to stem cells with cells and tissues. This article aims to review the naturally occurring biodegradable nanomaterials that are used in cardiovascular tissue engineering for the development of cardiac patches, vessels, and tissues. Moreover, this article also provides an overview of cell sources used for cardiac tissue engineering, explains the anatomy and physiology of the human heart, and explores the regeneration of cardiac cells and the nanofabrication approaches used in cardiac tissue engineering as well as scaffolds.
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Affiliation(s)
- Rabia Aziz
- Department of Information and Electrical Engineering and Applied Mathematics (DIEM), University of Salerno, 84084 Fisciano, Italy; (M.F.); (S.M.); (P.L.); (M.G.)
- Consiglio Nazionale Delle Ricerche (CNR)-Istituto Officina dei Materiali (IOM), Area Science Park Basovizza S.S. 14-Km. 163, 5-34149 Trieste, Italy
| | - Mariarosaria Falanga
- Department of Information and Electrical Engineering and Applied Mathematics (DIEM), University of Salerno, 84084 Fisciano, Italy; (M.F.); (S.M.); (P.L.); (M.G.)
| | - Jelena Purenovic
- Department of Physics and Materials, Faculty of Sciences at Cacak, University of Kragujevac, 32000 Cacak, Serbia;
| | - Simona Mancini
- Department of Information and Electrical Engineering and Applied Mathematics (DIEM), University of Salerno, 84084 Fisciano, Italy; (M.F.); (S.M.); (P.L.); (M.G.)
| | - Patrizia Lamberti
- Department of Information and Electrical Engineering and Applied Mathematics (DIEM), University of Salerno, 84084 Fisciano, Italy; (M.F.); (S.M.); (P.L.); (M.G.)
- Italian Interuniversity Research Center on Interaction between Electromagnetic Fields and Biosystems (ICEmB), Università Degli Studi di Genova, DITEN, Via all’Opera Pia 11/a, 16145 Genova, Italy
- Interdepartmental Research Centre for Nanomaterials and Nanotechnology at the University of Salerno (NanoMates), Department of Physics, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Michele Guida
- Department of Information and Electrical Engineering and Applied Mathematics (DIEM), University of Salerno, 84084 Fisciano, Italy; (M.F.); (S.M.); (P.L.); (M.G.)
- Italian Interuniversity Research Center on Interaction between Electromagnetic Fields and Biosystems (ICEmB), Università Degli Studi di Genova, DITEN, Via all’Opera Pia 11/a, 16145 Genova, Italy
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5
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McFetridge ML, Kulkarni K, Hilsenstein V, Del Borgo MP, Aguilar MI, Ricardo SD. A comparison of fixation methods for SEM analysis of self-assembling peptide hydrogel nanoarchitecture. NANOSCALE 2023; 15:1431-1440. [PMID: 36594515 DOI: 10.1039/d2nr04598b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Determining the porosity of hydrogels is an important component of material characterisation. While scanning electron microscopy (SEM) is a widely used method to study hydrogel nanoarchitecture, it is well-established that SEM sample preparation methods can alter the structure of hydrogels. Herein we describe the impact of sample preparation on the SEM analysis of self-assembling β-peptide hydrogels. Three methods of hydrogel preparation for SEM were compared, and each method preserved distinctly different nanoarchitecture, specifically, different levels of fibre alignment and porosity. Comparison of conventional SEM preparation and our hybrid method, which comprises high pressure freezing, freeze substitution without fixative and critical point drying, showed a high degree of similarity at the nanometre scale and diverging architecture at the micron scale. This study quantified the impact of chemical fixation versus high pressure freezing on self-assembling β3-peptide hydrogels, demonstrated the effect of sample preparation on fibre alignment and porosity, and presents a novel hybrid preparation method where chemical fixation can be avoided when conventional SEM is desired.
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Affiliation(s)
- Meg L McFetridge
- Department of Pharmacology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.
| | - Ketav Kulkarni
- Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.
| | - Volker Hilsenstein
- Monash Micro Imaging, Monash University, Clayton, Victoria 3800, Australia
- European Molecular Biology Laboratory (EMBL), Alexandrov Group, Meyerhofstr. 1, Heidelberg, Germany
| | - Mark P Del Borgo
- Department of Pharmacology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.
| | - Marie-Isabel Aguilar
- Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.
| | - Sharon D Ricardo
- Department of Pharmacology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.
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6
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Moiseiwitsch N, Zwennes N, Szlam F, Sniecinski R, Brown A. COVID-19 patient fibrinogen produces dense clots with altered polymerization kinetics, partially explained by increased sialic acid. J Thromb Haemost 2022; 20:2909-2920. [PMID: 36111490 PMCID: PMC9537908 DOI: 10.1111/jth.15882] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 08/23/2022] [Accepted: 09/15/2022] [Indexed: 01/13/2023]
Abstract
BACKGROUND Thrombogenicity is a known complication of COVID-19, resulting from SARS-CoV-2 infection, with significant effects on morbidity and mortality. OBJECTIVE We aimed to better understand the effects of COVID-19 on fibrinogen and the resulting effects on clot structure, formation, and degradation. METHODS Fibrinogen isolated from COVID-19 patients and uninfected subjects was used to form uniformly concentrated clots (2 mg/ml), which were characterized using confocal microscopy, scanning electron microscopy, atomic force microscopy, and endogenous and exogenous fibrinolysis assays. Neuraminidase digestion and subsequent NANA assay were used to quantify sialic acid residue presence; clots made from the desialylated fibrinogen were then assayed similarly to the original fibrinogen clots. RESULTS Clots made from purified fibrinogen from COVID-19 patients were shown to be significantly stiffer and denser than clots made using fibrinogen from noninfected subjects. Endogenous and exogenous fibrinolysis assays demonstrated that clot polymerization and degradation dynamics were different for purified fibrinogen from COVID-19 patients compared with fibrinogen from noninfected subjects. Quantification of sialic acid residues via the NANA assay demonstrated that SARS-CoV-2-positive fibrinogen samples contained significantly more sialic acid. Desialylation via neuraminidase digestion resolved differences in clot density. Desialylation did not normalize differences in polymerization, but did affect rate of exogenous fibrinolysis. DISCUSSION These differences noted in purified SARS-CoV-2-positive clots demonstrate that structural differences in fibrinogen, and not just differences in gross fibrinogen concentration, contribute to clinical differences in thrombotic features associated with COVID-19. These structural differences are at least in part mediated by differential sialylation.
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Affiliation(s)
- Nina Moiseiwitsch
- Joint Department of Biomedical Engineering of University of North Carolina - Chapel Hill and North Carolina State University, Raleigh, North Carolina, USA
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
| | - Nicole Zwennes
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Department of Biological Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Fania Szlam
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Roman Sniecinski
- Department of Anesthesiology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Ashley Brown
- Joint Department of Biomedical Engineering of University of North Carolina - Chapel Hill and North Carolina State University, Raleigh, North Carolina, USA
- Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina, USA
- Department of Material Science and Engineering, North Carolina State University, Raleigh, North Carolina, USA
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7
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Riazi Moghadam R, Keshvari H, Imani R, Nazarpak MH. A biomimetic three-layered fibrin gel/PLLA nanofibers composite as a potential scaffold for articular cartilage tissue engineering application. Biomed Mater 2022; 17. [PMID: 35973416 DOI: 10.1088/1748-605x/ac8a32] [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: 11/22/2020] [Accepted: 08/16/2022] [Indexed: 11/11/2022]
Abstract
Developing an engineered scaffold inspired by structural features of healthy articular cartilage (AC) has attracted much attention. In this study, the design and fabrication of a three-layered fiber/hydrogel scaffold in which each layer replicates the organization of a pertinent layer of AC tissue is aimed. To this end, electrospun poly L-lactic acid (PLLA) nanofibers are prepared and fragmented into nano/micro cylinders via aminolysis. Three-layers of the scaffold in which continuous fibrous layer, fibrin gel incorporated by chopped fibers and fibrin gel embedded by cylindrical aligned fibrous mat perpendicular to articulating surface, respectively served as an upper, middle and bottom layers, are prepared. The layers' physicomechanical characteristics are comprehensively evaluated. Results show that optimized electrospinning set up results in the smallest fibers diameter of 367±317 nm and successful aminolysis provides amine-functionalized chopped nanofibers with a mean length of 1.65±1.2 µm. Static mechanical analysis of the layers demonstrates that Young tensile modulus of the upper layer is 152± 17 MPa while compressive moduli of the middle and bottom layers are 38±4 and 79± 6 KPa, respectively. Assessing mechanical parameters under dynamic loading also shows that adding fibrous part in the composite scaffold layers enhances viscoelastic behavior of fibrin gel. Also, incorporation of 0.25% chopped fibers into the fibrin matrix notably enhances the equilibrium water content; however, it increases in-vitro weigh loss rate from 6% to 10.5% during a seven-day period. cytocompatibility analysis confirms that all layers possess acceptable cytocompatibility. In a conclusion, the designed three-layered composite structure successfully mimics the physicomechanical as well as microstructural features of AC and could be suggested as a potential scaffold for this tissue regeneration.
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Affiliation(s)
- Roozbeh Riazi Moghadam
- Biomedical Engineering, Amirkabir University of Technology, No. 350, Hafez Ave, Valiasr Square, Tehran, Iran, Tehran, 159163-4311, Iran (the Islamic Republic of)
| | - Hamid Keshvari
- Department of Biomedical Engineering, Amirkabir University of Technology, No. 350, Hafez Ave, Valiasr Square, Tehran, Iran, IRAN, Tehran, Tehran, 159163-4311, Iran (the Islamic Republic of)
| | - Rana Imani
- Biomedical Engineering, Amirkabir University of Technology, No. 350, Hafez Ave, Valiasr Square, Tehran, Iran, Tehran, 159163-4311, Iran (the Islamic Republic of)
| | - Masoumeh Haghbin Nazarpak
- New technologies Research Center, Amirkabir University of Technology, No. 350, Hafez Ave, Valiasr Square, Tehran, Iran 1591634311, Tehran, 158754413, Iran (the Islamic Republic of)
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8
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Patiño Vargas MI, Martinez-Garcia FD, Offens F, Becerra NY, Restrepo LM, van der Mei HC, Harmsen MC, van Kooten TG, Sharma PK. Viscoelastic properties of plasma-agarose hydrogels dictate favorable fibroblast responses for skin tissue engineering applications. BIOMATERIALS ADVANCES 2022; 139:212967. [PMID: 35882126 DOI: 10.1016/j.bioadv.2022.212967] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 05/26/2022] [Accepted: 05/31/2022] [Indexed: 12/17/2022]
Abstract
Dermal wound healing relies on the properties of the extracellular matrix (ECM). Thus, hydrogels that replicate skin ECM have reached clinical application. After a dermal injury, a transient, biodegradable fibrin clot is instrumental in wound healing. Human plasma, and its main constituent, fibrin would make a suitable biomaterial for improving wound healing and processed as hydrogels albeit with limited mechanical strength. To overcome this, plasma-agarose (PA) composite hydrogels have been developed and used to prepare diverse bioengineered tissues. To date, little is known about the influence of variable agarose concentrations on the viscoelastic properties of PA hydrogels and their correlation to cell biology. This study reports the characterization of the viscoelastic properties of different concentrations of agarose in PA hydrogels: 0 %, 0.5 %, 1 %, 1.5 %, and 2 % (w/v), and their influence on the cell number and mitochondrial activity of human dermal fibroblasts. Results show that agarose addition increased the stiffness, relaxation time constants 1 (τ1) and 2 (τ2), and fiber diameter, whereas the porosity decreased. Changes in cell metabolism occurred at the early stages of culturing and correlated to the displacement of fast (τ1) and intermediate (τ2) Maxwell elements. Fibroblasts seeded in low PA concentrations spread faster during 14 d than cells cultured in higher agarose concentrations. Collectively, these results confirm that PA viscoelasticity and hydrogel architecture strongly influenced cell behavior. Therefore, viscoelasticity is a key parameter in the design of PA-based implants.
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Affiliation(s)
- Maria Isabel Patiño Vargas
- University of Groningen, University Medical Center Groningen, Department of Biomedical Engineering, Groningen, the Netherlands; Tissue Engineering and Cell Therapy Group, Faculty of Medicine, University of Antioquia, Medellín, Colombia
| | - Francisco Drusso Martinez-Garcia
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Groningen, the Netherlands
| | - Freya Offens
- University of Groningen, University Medical Center Groningen, Department of Biomedical Engineering, Groningen, the Netherlands
| | - Natalia Y Becerra
- Tissue Engineering and Cell Therapy Group, Faculty of Medicine, University of Antioquia, Medellín, Colombia
| | - Luz M Restrepo
- Tissue Engineering and Cell Therapy Group, Faculty of Medicine, University of Antioquia, Medellín, Colombia
| | - Henny C van der Mei
- University of Groningen, University Medical Center Groningen, Department of Biomedical Engineering, Groningen, the Netherlands
| | - Martin C Harmsen
- University of Groningen, University Medical Center Groningen, Department of Pathology and Medical Biology, Groningen, the Netherlands
| | - Theo G van Kooten
- University of Groningen, University Medical Center Groningen, Department of Biomedical Engineering, Groningen, the Netherlands
| | - Prashant K Sharma
- University of Groningen, University Medical Center Groningen, Department of Biomedical Engineering, Groningen, the Netherlands.
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9
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Trinh D, Gardner RA, Franciosi AN, McCarthy C, Keane MP, Soliman MG, O’Donnell JS, Meleady P, Spencer DIR, Monopoli MP. Nanoparticle Biomolecular Corona-Based Enrichment of Plasma Glycoproteins for N-Glycan Profiling and Application in Biomarker Discovery. ACS NANO 2022; 16:5463-5475. [PMID: 35341249 PMCID: PMC9047655 DOI: 10.1021/acsnano.1c09564] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 03/10/2022] [Indexed: 05/28/2023]
Abstract
Biomolecular corona formation has emerged as a recurring and important phenomenon in nanomedicine that has been investigated for potential applications in disease diagnosis. In this study, we have combined the "personalized protein corona" with the N-glycosylation profiling that has recently gained considerable interest in human plasma biomarker discovery as a powerful early warning diagnostic and patient stratification tool. We envisioned that the protein corona formation could be exploited as an enrichment step that is critically important in both proteomic and proteoglycomic workflows. By using silica nanoparticles, plasma fibrinogen was enriched to a level in which its proteomic and glycomic "fingerprints" could be traced with confidence. Despite being a more simplified glycan profile compared to full plasma, the corona glycan profile revealed a fibrinogen-derived glycan peak that was found to potentially distinguish lung cancer patients from controls in a pilot study.
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Affiliation(s)
- Duong
N. Trinh
- Department
of Chemistry, Royal College of Surgeons in Ireland, University of Medicine and Health Sciences, Dublin 2, Ireland
| | - Richard A. Gardner
- Ludger
Ltd., Culham Science Centre, Abingdon, Oxfordshire OX14 3EB, United Kingdom
| | - Alessandro N. Franciosi
- UBC
Faculty of Medicine, Department of Respiratory Medicine, University of British Columbia, Vancouver, British Columbia V6Z 1Y6, Canada
| | - Cormac McCarthy
- Department
of Respiratory Medicine, St. Vincent’s
University Hospital, Dublin 4, Ireland
- School
of Medicine, University College Dublin, Dublin 4, Ireland
| | - Michael P. Keane
- Department
of Respiratory Medicine, St. Vincent’s
University Hospital, Dublin 4, Ireland
- School
of Medicine, University College Dublin, Dublin 4, Ireland
| | - Mahmoud G. Soliman
- Department
of Chemistry, Royal College of Surgeons in Ireland, University of Medicine and Health Sciences, Dublin 2, Ireland
- Physics Department,
Faculty of Science, Al-Azhar University, Nasr City 11884, Cairo, Egypt
| | - James S. O’Donnell
- Irish
Centre for Vascular Biology, School of Pharmacy and Biomolecular Sciences,
Royal College of Surgeons in Ireland, University
of Medicine and Health Sciences, Dublin 2, Ireland
| | - Paula Meleady
- School
of
Biotechnology, Dublin City University, Dublin 9, Ireland
| | - Daniel I. R. Spencer
- Ludger
Ltd., Culham Science Centre, Abingdon, Oxfordshire OX14 3EB, United Kingdom
| | - Marco P. Monopoli
- Department
of Chemistry, Royal College of Surgeons in Ireland, University of Medicine and Health Sciences, Dublin 2, Ireland
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10
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Matveeva VG, Senokosova EA, Sevostianova VV, Khanova MY, Glushkova TV, Akentieva TN, Antonova LV, Barbarash LS. Advantages of Fibrin Polymerization Method without the Use of Exogenous Thrombin for Vascular Tissue Engineering Applications. Biomedicines 2022; 10:biomedicines10040789. [PMID: 35453539 PMCID: PMC9026760 DOI: 10.3390/biomedicines10040789] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/16/2022] [Accepted: 03/25/2022] [Indexed: 01/01/2023] Open
Abstract
Fibrin is widely used in vascular tissue engineering. Typically, fibrin polymerization is initiated by adding exogenous thrombin. In this study, we proposed a protocol for the preparation of completely autologous fibrin without the use of endogenous thrombin and compared the properties of the prepared fibrin matrix with that obtained by the traditional method. Fibrinogen was obtained by ethanol precipitation followed by fibrin polymerization by adding either exogenous thrombin and calcium chloride (ExThr), or only calcium chloride (EnThr). We examined the structure, mechanical properties, thrombogenicity, degradation rate and cytocompatibility of fibrin matrices. Factor XIII (FXIII) quantitative assay was performed by ELISA, and FXIII activity was assessed by SDS-PAGE detection of γ-γ cross-links. The results show that network structure of EnThr fibrin was characterized by thinner fibers. The EnThr fibrin matrices had higher strength, stiffness and resistance to proteolytic degradation compared to ExThr fibrin. EnThr fibrin matrices exhibited less thrombogenicity in vitro than ExThr, and retained high cytocompatibility. Thus, the proposed approach has several advantages over the traditional method, namely the fabrication of a completely autologous coating material that has better mechanical properties, higher resistance to proteolysis and lower thrombogenicity.
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11
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Volpi M, Paradiso A, Costantini M, Świȩszkowski W. Hydrogel-Based Fiber Biofabrication Techniques for Skeletal Muscle Tissue Engineering. ACS Biomater Sci Eng 2022; 8:379-405. [PMID: 35084836 PMCID: PMC8848287 DOI: 10.1021/acsbiomaterials.1c01145] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 01/14/2022] [Indexed: 12/11/2022]
Abstract
The functional capabilities of skeletal muscle are strongly correlated with its well-arranged microstructure, consisting of parallelly aligned myotubes. In case of extensive muscle loss, the endogenous regenerative capacity is hindered by scar tissue formation, which compromises the native muscle structure, ultimately leading to severe functional impairment. To address such an issue, skeletal muscle tissue engineering (SMTE) attempts to fabricate in vitro bioartificial muscle tissue constructs to assist and accelerate the regeneration process. Due to its dynamic nature, SMTE strategies must employ suitable biomaterials (combined with muscle progenitors) and proper 3D architectures. In light of this, 3D fiber-based strategies are gaining increasing interest for the generation of hydrogel microfibers as advanced skeletal muscle constructs. Indeed, hydrogels possess exceptional biomimetic properties, while the fiber-shaped morphology allows for the creation of geometrical cues to guarantee proper myoblast alignment. In this review, we summarize commonly used hydrogels in SMTE and their main properties, and we discuss the first efforts to engineer hydrogels to guide myoblast anisotropic orientation. Then, we focus on presenting the main hydrogel fiber-based techniques for SMTE, including molding, electrospinning, 3D bioprinting, extrusion, and microfluidic spinning. Furthermore, we describe the effect of external stimulation (i.e., mechanical and electrical) on such constructs and the application of hydrogel fiber-based methods on recapitulating complex skeletal muscle tissue interfaces. Finally, we discuss the future developments in the application of hydrogel microfibers for SMTE.
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Affiliation(s)
- Marina Volpi
- Faculty
of Materials Science and Engineering, Warsaw
University of Technology, Warsaw 02-507, Poland
| | - Alessia Paradiso
- Faculty
of Materials Science and Engineering, Warsaw
University of Technology, Warsaw 02-507, Poland
| | - Marco Costantini
- Institute
of Physical Chemistry, Polish Academy of
Sciences, Warsaw 01-224, Poland
| | - Wojciech Świȩszkowski
- Faculty
of Materials Science and Engineering, Warsaw
University of Technology, Warsaw 02-507, Poland
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12
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Differential sialic acid content in adult and neonatal fibrinogen mediates differences in clot polymerization dynamics. Blood Adv 2021; 5:5202-5214. [PMID: 34555851 PMCID: PMC9153052 DOI: 10.1182/bloodadvances.2021004417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 07/21/2021] [Indexed: 11/20/2022] Open
Abstract
Increased sialic acid in neonatal fibrinogen influences fibrin knob-hole interactions during polymerization. Neonatal fibrin polymerization involves more B knob– and fewer A knob–mediated interactions compared with adults.
Neonates possess a molecular variant of fibrinogen, known as fetal fibrinogen, characterized by increased sialic acid, a greater negative charge, and decreased activity compared with adults. Despite these differences, adult fibrinogen is used for the treatment of bleeding in neonates, with mixed efficacy. To determine safe and efficacious bleeding protocols for neonates, more information on neonatal fibrin clot formation and the influence of sialic acid on these processes is needed. Here, we examine the influence of sialic acid on neonatal fibrin polymerization. We hypothesized that the increased sialic acid content of neonatal fibrinogen promotes fibrin B:b knob-hole interactions and consequently influences the structure and function of the neonatal fibrin matrix. We explored this hypothesis through analysis of structural properties and knob:hole polymerization dynamics of normal and desialylated neonatal fibrin networks and compared them with those formed with adult fibrinogen. We then characterized normal neonatal fibrin knob:hole interactions by forming neonatal and adult clots with either thrombin or snake-venom thrombin-like enzymes that preferentially cleave fibrinopeptide A or B. Sialic acid content of neonatal fibrinogen was determined to be a key determinant of resulting clot properties. Experiments analyzing knob:hole dynamics indicated that typical neonatal fibrin clots are formed with the release of more fibrinopeptide B and less fibrinopeptide A than adults. After the removal of sialic acid, fibrinopeptide release was roughly equivalent between adults and neonates, indicating the influence of sialic acid on fibrin neonatal fibrin polymerization mechanisms. These results could inform future studies developing neonatal-specific treatments of bleeding.
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13
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Zastosowanie fibryny w inżynierii tkankowej. Osiągnięcia i perspektywy. POSTEP HIG MED DOSW 2021. [DOI: 10.2478/ahem-2021-0017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstrakt
W ostatnich latach istotnym obszarem zastosowania fibryny stała się inżynieria tkankowa, w której wykorzystuje się naturalne właściwości biostatyczne i bioaktywne fibryny, a także możliwość pułapkowania i wiązania w jej strukturze czynników wzrostu. Fibryna jest najczęściej stosowana w postaci żeli i dysków. Jednak każda postać wskutek pochłaniania wody docelowo przyjmuje postać żelu. Białko to w warunkach in vivo spełnia rolę rusztowania dla komórek, a także może być aplikowane w miejsca trudno dostępne – może wypełniać ubytki tkanek i podtrzymywać tkanki okalające, zapobiegając ich zapadaniu się. Ponadto fibryna hamuje krwawienie i inicjuje proces odnowy, jak również pełni rolę stymulatora wzrostu komórek. Przez modyfikacje struktury fibryny cząsteczkami adhezyjnymi, można przyspieszyć odbudowę prawidłowej struktury tkanek. Jej właściwości strukturalne mogą być także wykorzystywane jako rezerwuar czynników wzrostu i system ich przedłużonego uwalniania. Fibryna jest materiałem biodegradowalnym, umożliwiając skorelowanie ubytku matrycy fibrynowej z odbudową tkanek własnych pacjenta. Wprowadzenie metod druku 3D i elektroprzędzenia umożliwia formulację dopasowanych do uszkodzeń kształtek oraz włóknin bez utraty bioaktywnych funkcji fibryny. Metody te umożliwiają także poprawę właściwości mechanicznych przez otrzymywanie m.in. włóknin fibryny z innymi polimerami, co jest szczególnie uzasadnione w przypadku materiałów stosowanych w odbudowie takich struktur jak ścięgna czy kości. Biotechnologiczna synteza fibrynogenu może w przyszłości uniezależnić pozyskiwanie go z krwi i zwiększyć popularność wyrobów medycznych otrzymywanych z fibryny.
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14
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Nam K, Dos Santos HT, Maslow F, Trump BG, Lei P, Andreadis ST, Baker OJ. Laminin-1 Peptides Conjugated to Fibrin Hydrogels Promote Salivary Gland Regeneration in Irradiated Mouse Submandibular Glands. Front Bioeng Biotechnol 2021; 9:729180. [PMID: 34631679 PMCID: PMC8498954 DOI: 10.3389/fbioe.2021.729180] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/23/2021] [Indexed: 11/13/2022] Open
Abstract
Previous studies demonstrated that salivary gland morphogenesis and differentiation are enhanced by modification of fibrin hydrogels chemically conjugated to Laminin-1 peptides. Specifically, Laminin-1 peptides (A99: CGGALRGDN-amide and YIGSR: CGGADPGYIGSRGAA-amide) chemically conjugated to fibrin promoted formation of newly organized salivary epithelium both in vitro (e.g., using organoids) and in vivo (e.g., in a wounded mouse model). While these studies were successful, the model's usefulness for inducing regenerative patterns after radiation therapy remains unknown. Therefore, the goal of the current study was to determine whether transdermal injection with the Laminin-1 peptides A99 and YIGSR chemically conjugated to fibrin hydrogels promotes tissue regeneration in irradiated salivary glands. Results indicate that A99 and YIGSR chemically conjugated to fibrin hydrogels promote formation of functional salivary tissue when transdermally injected to irradiated salivary glands. In contrast, when left untreated, irradiated salivary glands display a loss in structure and functionality. Together, these studies indicate that fibrin hydrogel-based implantable scaffolds containing Laminin-1 peptides promote secretory function of irradiated salivary glands.
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Affiliation(s)
- Kihoon Nam
- Bond Life Sciences Center, University of Missouri, Columbia, MO, United States.,Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, MO, United States
| | - Harim T Dos Santos
- Bond Life Sciences Center, University of Missouri, Columbia, MO, United States.,Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, MO, United States
| | - Frank Maslow
- Bond Life Sciences Center, University of Missouri, Columbia, MO, United States.,Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, MO, United States
| | - Bryan G Trump
- School of Dentistry, University of Utah, Salt Lake City, UT, United States
| | - Pedro Lei
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY, United States
| | - Stelios T Andreadis
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY, United States.,Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY, United States.,Center of Bioinformatics and Life Sciences, University at Buffalo, The State University of New York, Buffalo, NY, United States.,Center of Cell, Gene and Tissue Engineering, University at Buffalo, The State University of New York, Buffalo, NY, United States
| | - Olga J Baker
- Bond Life Sciences Center, University of Missouri, Columbia, MO, United States.,Department of Otolaryngology-Head and Neck Surgery, School of Medicine, University of Missouri, Columbia, MO, United States.,Department of Biochemistry, University of Missouri, Columbia, MO, United States
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15
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Duval C, Baranauskas A, Feller T, Ali M, Cheah LT, Yuldasheva NY, Baker SR, McPherson HR, Raslan Z, Bailey MA, Cubbon RM, Connell SD, Ajjan RA, Philippou H, Naseem KM, Ridger VC, Ariëns RAS. Elimination of fibrin γ-chain cross-linking by FXIIIa increases pulmonary embolism arising from murine inferior vena cava thrombi. Proc Natl Acad Sci U S A 2021; 118:e2103226118. [PMID: 34183396 PMCID: PMC8271579 DOI: 10.1073/pnas.2103226118] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The onset of venous thromboembolism, including pulmonary embolism, represents a significant health burden affecting more than 1 million people annually worldwide. Current treatment options are based on anticoagulation, which is suboptimal for preventing further embolic events. In order to develop better treatments for thromboembolism, we sought to understand the structural and mechanical properties of blood clots and how this influences embolism in vivo. We developed a murine model in which fibrin γ-chain cross-linking by activated Factor XIII is eliminated (FGG3X) and applied methods to study thromboembolism at whole-body and organ levels. We show that FGG3X mice have a normal phenotype, with overall coagulation parameters and platelet aggregation and function largely unaffected, except for total inhibition of fibrin γ-chain cross-linking. Elimination of fibrin γ-chain cross-linking resulted in thrombi with reduced strength that were prone to fragmentation. Analysis of embolism in vivo using Xtreme optical imaging and light sheet microscopy demonstrated that the elimination of fibrin γ-chain cross-linking resulted in increased embolization without affecting clot size or lysis. Our findings point to a central previously unrecognized role for fibrin γ-chain cross-linking in clot stability. They also indirectly indicate mechanistic targets for the prevention of thrombosis through selective modulation of fibrin α-chain but not γ-chain cross-linking by activated Factor XIII to reduce thrombus size and burden, while maintaining clot stability and preventing embolism.
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Affiliation(s)
- Cédric Duval
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Adomas Baranauskas
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Tímea Feller
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Majid Ali
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Lih T Cheah
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Nadira Y Yuldasheva
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Stephen R Baker
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Helen R McPherson
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Zaher Raslan
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Marc A Bailey
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Richard M Cubbon
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Simon D Connell
- School of Physics and Astronomy, University of Leeds, Leeds LS2 3AR, United Kingdom
| | - Ramzi A Ajjan
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Helen Philippou
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Khalid M Naseem
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Victoria C Ridger
- Department of Infection, Immunity and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield S10 2RX, United Kingdom
| | - Robert A S Ariëns
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom;
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16
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Theodoridis K, Manthou ME, Aggelidou E, Kritis A. In Vivo Cartilage Regeneration with Cell-Seeded Natural Biomaterial Scaffold Implants: 15-Year Study. TISSUE ENGINEERING PART B-REVIEWS 2021; 28:206-245. [PMID: 33470169 DOI: 10.1089/ten.teb.2020.0295] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Articular cartilage can be easily damaged from human's daily activities, leading to inflammation and to osteoarthritis, a situation that can diminish the patients' quality of life. For larger cartilage defects, scaffolds are employed to provide cells the appropriate three-dimensional environment to proliferate and differentiate into healthy cartilage tissue. Natural biomaterials used as scaffolds, attract researchers' interest because of their relative nontoxic nature, their abundance as natural products, their easy combination with other materials, and the relative easiness to establish Marketing Authorization. The last 15 years were chosen to review, document, and elucidate the developments on cell-seeded natural biomaterials for articular cartilage treatment in vivo. The parameters of the experimental designs and their results were all documented and presented. Considerations about the newly formed cartilage and the treatment of cartilage defects were discussed, along with difficulties arising when applying natural materials, research limitations, and tissue engineering approaches for hyaline cartilage regeneration.
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Affiliation(s)
- Konstantinos Theodoridis
- Department of Physiology and Pharmacology, Faculty of Health Sciences and cGMP Regenerative Medicine Facility, School of Medicine, Aristotle University of Thessaloniki (A.U.Th), Thessaloniki, Greece
| | - Maria Eleni Manthou
- Laboratory of Histology, Embryology, and Anthropology, Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki (A.U.Th), Thessaloniki, Greece
| | - Eleni Aggelidou
- Department of Physiology and Pharmacology, Faculty of Health Sciences and cGMP Regenerative Medicine Facility, School of Medicine, Aristotle University of Thessaloniki (A.U.Th), Thessaloniki, Greece
| | - Aristeidis Kritis
- Department of Physiology and Pharmacology, Faculty of Health Sciences and cGMP Regenerative Medicine Facility, School of Medicine, Aristotle University of Thessaloniki (A.U.Th), Thessaloniki, Greece
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17
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Heene S, Thoms S, Kalies S, Wegner N, Peppermüller P, Born N, Walther F, Scheper T, Blume CA. Vascular Network Formation on Macroporous Polydioxanone Scaffolds. Tissue Eng Part A 2021; 27:1239-1249. [PMID: 33397206 DOI: 10.1089/ten.tea.2020.0232] [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] [Indexed: 11/12/2022] Open
Abstract
In this study, microvascular network structures for tissue engineering were generated on newly developed macroporous polydioxanone (PDO) scaffolds. PDO represents a polymer biodegradable within months and offers optimal material properties such as elasticity and nontoxic degradation products. PDO scaffolds prepared by porogen leaching and cryo-dried to achieve pore sizes of 326 ± 149.67 μm remained stable with equivalent values for Young's modulus after 4 weeks. Scaffolds were coated with fibrin for optimal cell adherence. To exclude interindividual differences, autologous fibrin was prepared out of human plasma-derived fibrinogen and proved a comparable quality to nonautologous commercially available fibrinogen. Fibrin-coated scaffolds were seeded with recombinant human umbilical vein endothelial cells expressing GFP (GFP-HUVECs) in coculture with adipose tissue-derived mesenchymal stem cells (AD-hMSCs) to form vascular networks. The growth factor content in culture media was optimized according its effect on network formation, quantified and assessed by AngioTool®. A ratio of 2:3 GFP-HUVECs/AD-hMSCs in medium enriched with 20 ng/mL vascular endothelial growth factor, basic fibroblast growth factor, and hydrocortisone was found to be optimal. Network structures appeared after 2 days of cultivation and stabilized until day 7. The resulting networks were lumenized that could be verified by dextran staining. This new approach might be suitable for microvascular tissue patches as a useful template to be used in diverse vascularized tissue constructs.
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Affiliation(s)
- Sebastian Heene
- Institute of Technical Chemistry, Leibniz University Hannover, Hannover, Germany
| | - Stefanie Thoms
- Institute of Technical Chemistry, Leibniz University Hannover, Hannover, Germany
| | | | - Nils Wegner
- Department of Materials Test Engineering, Technical University Dortmund, Dortmund, Germany
| | - Pia Peppermüller
- Institute of Technical Chemistry, Leibniz University Hannover, Hannover, Germany
| | | | - Frank Walther
- Department of Materials Test Engineering, Technical University Dortmund, Dortmund, Germany
| | - Thomas Scheper
- Institute of Technical Chemistry, Leibniz University Hannover, Hannover, Germany
| | - Cornelia A Blume
- Institute of Technical Chemistry, Leibniz University Hannover, Hannover, Germany
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18
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Chen SG, Ugwu F, Li WC, Caplice NM, Petcu E, Yip SP, Huang CL. Vascular Tissue Engineering: Advanced Techniques and Gene Editing in Stem Cells for Graft Generation. TISSUE ENGINEERING PART B-REVIEWS 2021; 27:14-28. [DOI: 10.1089/ten.teb.2019.0264] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Sin-Guang Chen
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, SAR, China
| | - Felix Ugwu
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, SAR, China
| | - Wan-Chun Li
- Institute of Oral Biology, School of Dentistry, National Yang-Ming University, Taipei, Taiwan, China
| | - Noel M. Caplice
- Centre for Research in Vascular Biology, Biosciences Institute, University College Cork, Cork, Ireland
| | - Eugen Petcu
- Griffith University School of Medicine, Menzies Health Institute Queensland, Griffith University, Nathan, Australia
| | - Shea Ping Yip
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, SAR, China
| | - Chien-Ling Huang
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, SAR, China
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19
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Nellenbach K, Nandi S, Peeler C, Kyu A, Brown AC. Neonatal Fibrin Scaffolds Promote Enhanced Cell Adhesion, Migration, and Wound Healing In Vivo Compared to Adult Fibrin Scaffolds. Cell Mol Bioeng 2020; 13:393-404. [PMID: 33184573 PMCID: PMC7596151 DOI: 10.1007/s12195-020-00620-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 05/20/2020] [Indexed: 10/24/2022] Open
Abstract
INTRODUCTION Fibrin scaffolds are often utilized to treat chronic wounds. The monomer fibrinogen used to create such scaffolds is typically derived from adult human or porcine plasma. However, our previous studies have identified extensive differences in fibrin network properties between adults and neonates, including higher fiber alignment in neonatal networks. Wound healing outcomes have been linked to fibrin matrix structure, including fiber alignment, which can affect the binding and migration of cells. We hypothesized that fibrin scaffolds derived from neonatal fibrin would enhance wound healing outcomes compared to adult fibrin scaffolds. METHODS Fibrin scaffolds were formed from purified adult or neonatal fibrinogen and thrombin then structural analysis was conducted via confocal microscopy. Human neonatal dermal fibroblast attachment, migration, and morphology on fibrin scaffolds were assessed. A murine full thickness injury model was used to compare healing in vivo in the presence of neonatal fibrin, adult fibrin, or saline. RESULTS Distinct fibrin architectures were observed between adult and neonatal scaffolds. Significantly higher fibroblast attachment and migration was observed on neonatal scaffolds compared to adults. Cell morphology on neonatal scaffolds exhibited higher spreading compared to adult scaffolds. In vivo significantly smaller wound areas and greater epidermal thickness were observed when wounds were treated with neonatal fibrin compared to adult fibrin or a saline control. CONCLUSIONS Distinctions in neonatal and adult fibrin scaffold properties influence cellular behavior and wound healing. These studies indicate that fibrin scaffolds sourced from neonatal plasma could improve healing outcomes compared to scaffolds sourced from adult plasma.
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Affiliation(s)
- Kimberly Nellenbach
- Joint Department of Biomedical Engineering, North Carolina State University and The University of North Carolina at Chapel Hill, Raleigh, NC 27695 USA
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC 27695 USA
| | - Seema Nandi
- Joint Department of Biomedical Engineering, North Carolina State University and The University of North Carolina at Chapel Hill, Raleigh, NC 27695 USA
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC 27695 USA
| | - Christopher Peeler
- Joint Department of Biomedical Engineering, North Carolina State University and The University of North Carolina at Chapel Hill, Raleigh, NC 27695 USA
| | - Alexander Kyu
- Joint Department of Biomedical Engineering, North Carolina State University and The University of North Carolina at Chapel Hill, Raleigh, NC 27695 USA
| | - Ashley C. Brown
- Joint Department of Biomedical Engineering, North Carolina State University and The University of North Carolina at Chapel Hill, Raleigh, NC 27695 USA
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC 27695 USA
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20
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Obiweluozor FO, Emechebe GA, Kim DW, Cho HJ, Park CH, Kim CS, Jeong IS. Considerations in the Development of Small-Diameter Vascular Graft as an Alternative for Bypass and Reconstructive Surgeries: A Review. Cardiovasc Eng Technol 2020; 11:495-521. [PMID: 32812139 DOI: 10.1007/s13239-020-00482-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 08/11/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND Current design strategies for small diameter vascular grafts (< 6 mm internal diameter; ID) are focused on mimicking native vascular tissue because the commercially available grafts still fail at small diameters, notably due to development of intimal hyperplasia and thrombosis. To overcome these challenges, various design approaches, material selection, and surface modification strategies have been employed to improve the patency of small-diameter grafts. REVIEW The purpose of this review is to outline various considerations in the development of small-diameter vascular grafts, including material choice, surface modifications to enhance biocompatibility/endothelialization, and mechanical properties of the graft, that are currently being implanted. Additionally, we have taken into account the general vascular physiology, tissue engineering approaches, and collective achievements of the authors in this area. We reviewed both commercially available synthetic grafts (e-PTFE and PET), elastic polymers such as polyurethane and biodegradable and bioresorbable materials. We included naturally occurring materials by focusing on their potential application in the development of future vascular alternatives. CONCLUSION Until now, there are few comprehensive reviews regarding considerations in the design of small-diameter vascular grafts in the literature. Here-in, we have discussed in-depth the various strategies employed to generate engineered vascular graft due to their high demand for vascular surgeries. While some TEVG design strategies have shown greater potential in contrast to autologous or synthetic ePTFE conduits, many are still hindered by high production cost which prevents their widespread adoption. Nonetheless, as tissue engineers continue to develop on their strategies and procedures for improved TEVGs, soon, a reliable engineered graft will be available in the market. Hence, we anticipate a viable TEVG with resorbable property, fabricated via electrospinning approach to hold a greater potential that can overcome the challenges observed in both autologous and allogenic grafts. This is because they can be mechanically tuned, incorporated/surface-functionalized with bioactive molecules and mass-manufactured in a reproducible manner. It is also found that most of the success in engineered vascular graft approaching commercialization is for large vessels rather than small-diameter grafts used as cardiovascular bypass grafts. Consequently, the field of vascular engineering is still available for future innovators that can take up the challenge to create a functional arterial substitute.
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Affiliation(s)
- Francis O Obiweluozor
- Department of Cardiac and Thoracic Surgery, Chonnam National University Hospital and Medical School, 42 Jebong-Ro Dong-gu, Gwangju, 501-757, Republic of Korea.
| | - Gladys A Emechebe
- Department of Bionanosystem Engineering Graduate School, Chonbuk National University, Jeonju City, Republic of Korea
| | - Do-Wan Kim
- Department of Cardiac and Thoracic Surgery, Chonnam National University Hospital and Medical School, 42 Jebong-Ro Dong-gu, Gwangju, 501-757, Republic of Korea
| | - Hwa-Jin Cho
- Department of Cardiac and Thoracic Surgery, Chonnam National University Hospital and Medical School, 42 Jebong-Ro Dong-gu, Gwangju, 501-757, Republic of Korea
| | - Chan Hee Park
- Department of Bionanosystem Engineering Graduate School, Chonbuk National University, Jeonju City, Republic of Korea
- Department of Mechanical Engineering Graduate School, Chonbuk National University, Jeonju City, Republic of Korea
| | - Cheol Sang Kim
- Department of Bionanosystem Engineering Graduate School, Chonbuk National University, Jeonju City, Republic of Korea
- Department of Mechanical Engineering Graduate School, Chonbuk National University, Jeonju City, Republic of Korea
| | - In Seok Jeong
- Department of Cardiac and Thoracic Surgery, Chonnam National University Hospital and Medical School, 42 Jebong-Ro Dong-gu, Gwangju, 501-757, Republic of Korea.
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21
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Woods I, Black A, Molloy EJ, Jockenhoevel S, Flanagan TC. Fabrication of blood-derived elastogenic vascular grafts using electrospun fibrinogen and polycaprolactone composite scaffolds for paediatric applications. J Tissue Eng Regen Med 2020; 14:1281-1295. [PMID: 32656942 DOI: 10.1002/term.3100] [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] [Received: 02/05/2020] [Revised: 06/12/2020] [Accepted: 07/02/2020] [Indexed: 01/17/2023]
Abstract
The development of tissue-engineered vascular grafts (TEVGs) for paediatric applications must consider unique factors associated with this patient cohort. Although the increased elastogenic potential of neonatal cells offers an opportunity to overcome the long-standing challenge of in vitro elastogenesis, neonatal patients have a lower tolerance for autologous tissue harvest and require grafts that exhibit growth potential. The purpose of this study was to apply a multipronged strategy to promote elastogenesis in conjunction with umbilical cord-derived materials in the production of a functional paediatric TEVG. An initial proof-of-concept study was performed to extract fibrinogen from human umbilical cord blood samples and, through electrospinning, to produce a nanofibrous fibrinogen scaffold. This scaffold was seeded with human umbilical artery-derived smooth muscle cells (hUASMCs), and neotissue formation within the scaffold was examined using immunofluorescence microscopy. Subsequently, a polycaprolactone-reinforced porcine blood-derived fibrinogen scaffold (isolated using the same protocol as cord blood fibrinogen) was used to develop a rolled-sheet graft that employed topographical and biochemical guidance cues to promote elastogenesis and cellular orientation. This approach resulted in a TEVG with robust mechanical properties and biomimetic arrangement of extracellular matrix (ECM) with rich expression of elastic fibre-related proteins. The results of this study hold promise for further development of paediatric TEVGs and the exploration of the effects of scaffold microstructure and nanostructure on vascular cell function and ECM production.
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Affiliation(s)
- Ian Woods
- Tissue Engineering Research Group, School of Medicine, University College Dublin, Dublin, Ireland.,National Children's Research Centre (NCRC), Children's Health Ireland (CHI) at Crumlin, Dublin, Ireland
| | - Alexander Black
- Anatomy, School of Medicine, National University of Ireland, Galway (NUIG), Galway, Ireland
| | - Eleanor J Molloy
- National Children's Research Centre (NCRC), Children's Health Ireland (CHI) at Crumlin, Dublin, Ireland.,Pediatrics, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Stefan Jockenhoevel
- Department for Biohybrid & Medical Textiles (BioTex), Institute for Applied Biomedical Engineering, RWTH Aachen University, Aachen, Germany.,Aachen-Maastricht Institute for Biobased Materials (AMIBM), Faculty of Science and Engineering, Maastricht University, Maastricht, The Netherlands
| | - Thomas C Flanagan
- Tissue Engineering Research Group, School of Medicine, University College Dublin, Dublin, Ireland.,National Children's Research Centre (NCRC), Children's Health Ireland (CHI) at Crumlin, Dublin, Ireland
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22
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Luzak B, Boncler M, Kosmalski M, Mnich E, Stanczyk L, Przygodzki T, Watala C. Fibrinogen Glycation and Presence of Glucose Impair Fibrin Polymerization-An In Vitro Study of Isolated Fibrinogen and Plasma from Patients with Diabetes Mellitus. Biomolecules 2020; 10:biom10060877. [PMID: 32517350 PMCID: PMC7356284 DOI: 10.3390/biom10060877] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 05/30/2020] [Accepted: 06/03/2020] [Indexed: 01/09/2023] Open
Abstract
Background: Fibrin formation and structure may be affected by a plethora of factors, including both genetic and posttranslational modifications, such as glycation, nitration or acetylation. Methods: The present study examines the effect of fibrinogen glycation on fibrin polymerization, measured in fibrinogen concentration-standardized plasma of subjects with type 2 diabetes mellitus (T2DM) and in a solution of human fibrinogen exposed to 30 mM glucose for four days. Results: The fibrin polymerization velocity (Vmax) observed in the T2DM plasma (median 0.0056; IQR 0.0049‒0.0061 AU/s) was significantly lower than in non-diabetic plasma (median 0.0063; IQR 0.0058‒0.0071 AU/s) (p < 0.05). Furthermore, significantly lower Vmax was observed for glucose-treated fibrinogen (Vmax 0.046; IQR 0.022‒0.085 AU/s) compared to control protein incubated with a pure vehicle (Vmax 0.053; IQR 0.034‒0.097 AU/s) (p < 0.05). The same tendency was observed in the fibrinogen samples supplemented with 6 mM glucose just before measurements. It is assumed that glucose may affect the ability of fibrinogen to form a stable clot in T2DM subjects, and that this impairment is likely to influence the outcomes of some diagnostic assays. As the example, the impaired clotting ability of glycated fibrinogen may considerably influence the results of the standard Clauss method, routinely used to determine fibrinogen concentration in plasma. The stoichiometric analysis demonstrated that spontaneous glycation at both the sites with high and low glycation potential clearly dominated in T2DM individuals in all fibrinogen chains.
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Affiliation(s)
- Boguslawa Luzak
- Department of Hemostasis and Hemostatic Disorders, Chair of Biomedical Sciences, Medical University of Lodz, Mazowiecka 6/8, 92-216 Lodz, Poland; (M.B.); (E.M.); (L.S.); (T.P.); (C.W.)
- Correspondence: ; Tel.: +48-42-2725740
| | - Magdalena Boncler
- Department of Hemostasis and Hemostatic Disorders, Chair of Biomedical Sciences, Medical University of Lodz, Mazowiecka 6/8, 92-216 Lodz, Poland; (M.B.); (E.M.); (L.S.); (T.P.); (C.W.)
| | - Marcin Kosmalski
- Department of Clinical Pharmacology, 1st Chair of Internal Medicine, Medical University of Lodz, Kopcinskiego 22, 90-153 Lodz, Poland;
| | - Ewelina Mnich
- Department of Hemostasis and Hemostatic Disorders, Chair of Biomedical Sciences, Medical University of Lodz, Mazowiecka 6/8, 92-216 Lodz, Poland; (M.B.); (E.M.); (L.S.); (T.P.); (C.W.)
| | - Lidia Stanczyk
- Department of Hemostasis and Hemostatic Disorders, Chair of Biomedical Sciences, Medical University of Lodz, Mazowiecka 6/8, 92-216 Lodz, Poland; (M.B.); (E.M.); (L.S.); (T.P.); (C.W.)
| | - Tomasz Przygodzki
- Department of Hemostasis and Hemostatic Disorders, Chair of Biomedical Sciences, Medical University of Lodz, Mazowiecka 6/8, 92-216 Lodz, Poland; (M.B.); (E.M.); (L.S.); (T.P.); (C.W.)
| | - Cezary Watala
- Department of Hemostasis and Hemostatic Disorders, Chair of Biomedical Sciences, Medical University of Lodz, Mazowiecka 6/8, 92-216 Lodz, Poland; (M.B.); (E.M.); (L.S.); (T.P.); (C.W.)
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23
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Nilforoushzadeh MA, Sisakht MM, Amirkhani MA, Seifalian AM, Banafshe HR, Verdi J, Nouradini M. Engineered skin graft with stromal vascular fraction cells encapsulated in fibrin–collagen hydrogel: A clinical study for diabetic wound healing. J Tissue Eng Regen Med 2020; 14:424-440. [DOI: 10.1002/term.3003] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 11/18/2019] [Accepted: 12/06/2019] [Indexed: 12/20/2022]
Affiliation(s)
| | - Mahsa Mollapour Sisakht
- Skin and Stem Cell Research CenterTehran University of Medical Sciences Tehran Iran
- Applied Cell Sciences DepartmentKashan University of Medical Science Kashan Iran
| | - Mohammad Amir Amirkhani
- Stem Cell and Regenerative Medicine Center of ExcellenceTehran University of Medical Sciences Tehran Iran
| | - Alexander M. Seifalian
- Nanotechnology and Regenerative Medicine Commercialisation Centre (NanoRegMed Ltd)The London BioScience Innovation Centre London UK
| | - Hamid Reza Banafshe
- Applied Cell Sciences DepartmentKashan University of Medical Science Kashan Iran
- Physiology Research CenterKashan University of Medical Sciences Kashan Iran
| | - Javad Verdi
- Applied Cell Sciences DepartmentKashan University of Medical Science Kashan Iran
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in MedicineTehran University of Medical Sciences Tehran Iran
| | - Mehdi Nouradini
- Applied Cell Sciences DepartmentKashan University of Medical Science Kashan Iran
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24
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Gholobova D, Terrie L, Gerard M, Declercq H, Thorrez L. Vascularization of tissue-engineered skeletal muscle constructs. Biomaterials 2019; 235:119708. [PMID: 31999964 DOI: 10.1016/j.biomaterials.2019.119708] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 12/10/2019] [Accepted: 12/18/2019] [Indexed: 12/26/2022]
Abstract
Skeletal muscle tissue can be created in vitro by tissue engineering approaches, based on differentiation of muscle stem cells. Several approaches exist and generally result in three dimensional constructs composed of multinucleated myofibers to which we refer as myooids. Engineering methods date back to 3 decades ago and meanwhile a wide range of cell types and scaffold types have been evaluated. Nevertheless, in most approaches, myooids remain very small to allow for diffusion-mediated nutrient supply and waste product removal, typically less than 1 mm thick. One of the shortcomings of current in vitro skeletal muscle organoid development is the lack of a functional vascular structure, thus limiting the size of myooids. This is a challenge which is nowadays applicable to almost all organoid systems. Several approaches to obtain a vascular structure within myooids have been proposed. The purpose of this review is to give a concise overview of these approaches.
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Affiliation(s)
- D Gholobova
- Tissue Engineering Lab, Department of Development and Regeneration, KU Leuven, E. Sabbelaan 53, 8500, Kortrijk, Belgium
| | - L Terrie
- Tissue Engineering Lab, Department of Development and Regeneration, KU Leuven, E. Sabbelaan 53, 8500, Kortrijk, Belgium
| | - M Gerard
- Tissue Engineering Lab, Department of Development and Regeneration, KU Leuven, E. Sabbelaan 53, 8500, Kortrijk, Belgium
| | - H Declercq
- Tissue Engineering Lab, Department of Development and Regeneration, KU Leuven, E. Sabbelaan 53, 8500, Kortrijk, Belgium
| | - L Thorrez
- Tissue Engineering Lab, Department of Development and Regeneration, KU Leuven, E. Sabbelaan 53, 8500, Kortrijk, Belgium.
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25
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Kniebs C, Kreimendahl F, Köpf M, Fischer H, Jockenhoevel S, Thiebes AL. Influence of Different Cell Types and Sources on Pre-Vascularisation in Fibrin and Agarose-Collagen Gels. Organogenesis 2019; 16:14-26. [PMID: 31809643 PMCID: PMC7051161 DOI: 10.1080/15476278.2019.1697597] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Vascularisation is essential for the development of tailored, tissue-engineered organs and tissues due to diffusion limits of nutrients and the lack of the necessary connection to the cardiovascular system. To pre-vascularize, endothelial cells and supporting cells can be embedded in the scaffold to foster an adequate nutrient and oxygen supply after transplantation. This technique is applied for tissue engineering of various tissues, but there have been few studies on the use of different cell types or cells sources. We compare the effect of supporting cells from different sources on vascularisation. Fibrin gels and agarose-collagen hydrogels were used as scaffolds. The supporting cells were primary human dermal fibroblasts (HDFs), human nasal fibroblasts (HNFs), human mesenchymal stem cells from umbilical cord’s Wharton’s jelly (WJ MSCs), adipose-derived MSCs (AD MSCs) and femoral bone marrow-derived MSCs (BM MSCs). The tissue constructs were incubated for 14 days and analyzed by two-photon laser scanning microscopy. Vascularisation was supported by all cell types, forming branched networks of tubular vascular structures in both hydrogels. In general, fibrin gels present a higher angiogenic promoting environment compared to agarose-collagen hydrogels and fibroblasts show a high angiogenic potential in co-culture with endothelial cells. In agarose-collagen hydrogels, vascular structures supported by AD MSCs were comparable to our HDF control in terms of volume, area and length. BM MSCs formed a homogeneous network of smaller structures in both hydrogels. This study provides data toward understanding the pre-vascularisation properties of different supporting cell types and sources for tissue engineering of different organs and tissues.
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Affiliation(s)
- Caroline Kniebs
- Department of Biohybrid and Medical Textiles (BioTex), AME - Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany.,Aachen-Maastricht Institute for Biobased Materials, Faculty of Science and Engineering, Maastricht University, Brightlands Chemelot Campus, Geleen, The Netherlands
| | - Franziska Kreimendahl
- Department of Biohybrid and Medical Textiles (BioTex), AME - Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany.,Aachen-Maastricht Institute for Biobased Materials, Faculty of Science and Engineering, Maastricht University, Brightlands Chemelot Campus, Geleen, The Netherlands
| | - Marius Köpf
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Aachen, Germany
| | - Horst Fischer
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Aachen, Germany
| | - Stefan Jockenhoevel
- Department of Biohybrid and Medical Textiles (BioTex), AME - Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany.,Aachen-Maastricht Institute for Biobased Materials, Faculty of Science and Engineering, Maastricht University, Brightlands Chemelot Campus, Geleen, The Netherlands
| | - Anja Lena Thiebes
- Department of Biohybrid and Medical Textiles (BioTex), AME - Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany.,Aachen-Maastricht Institute for Biobased Materials, Faculty of Science and Engineering, Maastricht University, Brightlands Chemelot Campus, Geleen, The Netherlands
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26
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Fernández-Colino A, Iop L, Ventura Ferreira MS, Mela P. Fibrosis in tissue engineering and regenerative medicine: treat or trigger? Adv Drug Deliv Rev 2019; 146:17-36. [PMID: 31295523 DOI: 10.1016/j.addr.2019.07.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 05/11/2019] [Accepted: 07/04/2019] [Indexed: 02/07/2023]
Abstract
Fibrosis is a life-threatening pathological condition resulting from a dysfunctional tissue repair process. There is no efficient treatment and organ transplantation is in many cases the only therapeutic option. Here we review tissue engineering and regenerative medicine (TERM) approaches to address fibrosis in the cardiovascular system, the kidney, the lung and the liver. These strategies have great potential to achieve repair or replacement of diseased organs by cell- and material-based therapies. However, paradoxically, they might also trigger fibrosis. Cases of TERM interventions with adverse outcome are also included in this review. Furthermore, we emphasize the fact that, although organ engineering is still in its infancy, the advances in the field are leading to biomedically relevant in vitro models with tremendous potential for disease recapitulation and development of therapies. These human tissue models might have increased predictive power for human drug responses thereby reducing the need for animal testing.
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27
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An in vitro model mimics the contact of biomaterials to blood components and the reaction of surrounding soft tissue. Acta Biomater 2019; 89:227-241. [PMID: 30880238 DOI: 10.1016/j.actbio.2019.03.029] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 02/20/2019] [Accepted: 03/13/2019] [Indexed: 12/21/2022]
Abstract
The therapeutic efficacy of a medical product after implantation depends strongly on the host-initiated fibrotic response (foreign body reaction). For novel biomaterials, it is of high relevance to understand this fibrotic process. As an alternative to in vivo studies, in vitro models mimic parts of the whole foreign body reaction. Aim of this study was to develop a wound model with key cells and matrix proteins in coculture. This approach combined blood components such as primary macrophages in a plasma-derived fibrin hydrogel, directly exposed to reference biomaterials (PTFE, glass, titanium). The soft tissue reaction is resembled by integrating fibroblasts in a collagen or a fibrin matrix. Those two experimental setups were conducted to show whether a long-term in vitro culture of 13 days is feasible. The response to reference biomaterials was assessed by multi-parametric analyses, comprising molecular profiling (cytokines, collagen I and ß-actin) and tissue remodeling (cell adherence, histological structure, tissue deposition). Polytetrafluorethylene (PTFE) and titanium were tested as references to correlate the in vitro evaluation to previous in vivo studies. Most striking, both model setups evaluated references' fibrotic characteristics as previously reported by in vivo studies. STATEMENT OF SIGNIFICANCE: We present a test platform applied for assessments on the foreign body reaction to biomaterials. This test system consists of blood components - macrophages and plasma-derived fibrin - as well as fibroblasts and collagen, generating a three-dimensional wound microenvironment. By this modular approach, we achieved a suitable test for long-term studies and overcame the limited short-term stability of whole blood tests. In contrast to previous models, macrophages' viability is maintained during the extended culture period and excels the quality of the model. The potential to evaluate a foreign body reaction in vitro was demonstrated with defined reference materials. This model system might be of high potential as a screening platform to identify novel biomaterial candidates.
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28
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Schnabel‐Lubovsky M, Kossover O, Melino S, Nanni F, Talmon Y, Seliktar D. Visualizing cell‐laden fibrin‐based hydrogels using cryogenic scanning electron microscopy and confocal microscopy. J Tissue Eng Regen Med 2019; 13:587-598. [DOI: 10.1002/term.2813] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 10/08/2018] [Accepted: 12/17/2018] [Indexed: 01/08/2023]
Affiliation(s)
- Maya Schnabel‐Lubovsky
- Department of Biomedical EngineeringTechnion—Israel Institute of Technology Haifa Israel
- Department of Chemical EngineeringTechnion—Israel Institute of Technology Haifa Israel
| | - Olga Kossover
- Department of Biomedical EngineeringTechnion—Israel Institute of Technology Haifa Israel
| | - Sonia Melino
- Department of Chemical Science and TechnologiesUniversity of Rome Tor Vergata Rome Italy
| | - Francesca Nanni
- Enterprise Engineering DepartmentUniversity of Rome Tor Vergata Rome Italy
- INSTMItalian Interuniversity Consortium on Materials Science and Technology 50121 Florence Italy
| | - Yeshayahu Talmon
- Department of Chemical EngineeringTechnion—Israel Institute of Technology Haifa Israel
- Russell Berrie Nanotechnology Institute (RBNI)Technion—Israel Institute of Technology Haifa Israel
| | - Dror Seliktar
- Department of Biomedical EngineeringTechnion—Israel Institute of Technology Haifa Israel
- Russell Berrie Nanotechnology Institute (RBNI)Technion—Israel Institute of Technology Haifa Israel
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29
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Kreimendahl F, Marquardt Y, Apel C, Bartneck M, Zwadlo-Klarwasser G, Hepp J, Jockenhoevel S, Baron JM. Macrophages significantly enhance wound healing in a vascularized skin model. J Biomed Mater Res A 2019; 107:1340-1350. [PMID: 30724457 DOI: 10.1002/jbm.a.36648] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/17/2019] [Accepted: 01/29/2019] [Indexed: 12/24/2022]
Abstract
Tissue-engineered dermo-epidermal skin grafts could be applied for the treatment of large skin wounds or used as an in vitro wound-healing model. However, there is currently no skin replacement model that includes both, endothelial cells to simulate vascularization, and macrophages to regulate wound healing and tissue regeneration. Here, we describe for the first time a tissue-engineered, fully vascularized dermo-epidermal skin graft based on a fibrin hydrogel scaffold, using exclusively human primary cells. We show that endothelial cells and human dermal fibroblasts form capillary-like structures within the dermis whereas keratinocytes form the epithelial cell layer. Macrophages played a key role in controlling the number of epithelial cells and their morphology after skin injury induced with a CO2 laser. The activation of selected cell types was confirmed by mRNA analysis. Our data underline the important role of macrophages in vascularized skin models for application as in vitro wound healing models or for skin replacement therapy. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1340-1350, 2019.
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Affiliation(s)
- Franziska Kreimendahl
- Department of Biohybrid & Medical Textiles (BioTex), AME-Helmholtz Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
| | - Yvonne Marquardt
- Department of Dermatology and Allergology, RWTH Aachen University Hospital, Aachen, Germany
| | - Christian Apel
- Department of Biohybrid & Medical Textiles (BioTex), AME-Helmholtz Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
| | - Matthias Bartneck
- Department of Medicine III, Medical Faculty, RWTH Aachen, Aachen, Germany
| | | | - Julia Hepp
- Department of Dermatology and Allergology, RWTH Aachen University Hospital, Aachen, Germany
| | - Stefan Jockenhoevel
- Department of Biohybrid & Medical Textiles (BioTex), AME-Helmholtz Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
| | - Jens Malte Baron
- Department of Dermatology and Allergology, RWTH Aachen University Hospital, Aachen, Germany
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30
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Gandhi JK, Knudsen T, Hill M, Roy B, Bachman L, Pfannkoch‐Andrews C, Schmidt KN, Metko MM, Ackerman MJ, Resch Z, Pulido JS, Marmorstein AD. Human Fibrinogen for Maintenance and Differentiation of Induced Pluripotent Stem Cells in Two Dimensions and Three Dimensions. Stem Cells Transl Med 2019; 8:512-521. [PMID: 30768863 PMCID: PMC6525556 DOI: 10.1002/sctm.18-0189] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 12/20/2018] [Indexed: 02/06/2023] Open
Abstract
Human fibrin hydrogels are a popular choice for use as a biomaterial within tissue engineered constructs because they are biocompatible, nonxenogenic, autologous use compatible, and biodegradable. We have recently demonstrated the ability to culture induced pluripotent stem cell (iPSC)‐derived retinal pigment epithelium on fibrin hydrogels. However, iPSCs themselves have relatively few substrate options (e.g., laminin) for expansion in adherent cell culture for use in cell therapy. To address this, we investigated the potential of culturing iPSCs on fibrin hydrogels for three‐dimensional applications and further examined the use of fibrinogen, the soluble precursor protein, as a coating substrate for traditional adherent cell culture. iPSCs successfully adhered to and proliferated on fibrin hydrogels. The two‐dimensional culture with fibrinogen allows for immediate adaption of culture models to a nonxenogeneic model. Similarly, multiple commercially available iPSC lines adhered to and proliferated on fibrinogen coated surfaces. iPSCs cultured on fibrinogen expressed similar levels of the pluripotent stem cell markers SSea4 (98.7% ± 1.8%), Oct3/4 (97.3% ± 3.8%), TRA1‐60 (92.2% ± 5.3%), and NANOG (96.0% ± 3.9%) compared with iPSCs on Geltrex. Using a trilineage differentiation assay, we found no difference in the ability of iPSCs grown on fibrinogen or Geltrex to differentiate to endoderm, mesoderm, or ectoderm. Finally, we demonstrated the ability to differentiate iPSCs to endothelial cells using only fibrinogen coated plates. On the basis of these data, we conclude that human fibrinogen provides a readily available and inexpensive alternative to laminin‐based products for the growth, expansion, and differentiation of iPSCs for use in research and clinical cell therapy applications. stem cells translational medicine2019;8:512–521
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Affiliation(s)
| | - Travis Knudsen
- Department of OphthalmologyMayo ClinicRochesterMinnesotaUSA
| | - Matthew Hill
- Department of OphthalmologyMayo ClinicRochesterMinnesotaUSA
| | - Bhaskar Roy
- Center for Regenerative MedicineMayo ClinicRochesterMinnesotaUSA
| | - Lori Bachman
- Department of OphthalmologyMayo ClinicRochesterMinnesotaUSA
| | | | | | | | - Michael J. Ackerman
- Departments of Cardiovascular Medicine, Pediatric and Adolescent Medicine, and Molecular Pharmacology & Experimental TherapeuticsMayo ClinicRochesterMinnesotaUSA
| | - Zachary Resch
- Center for Regenerative MedicineMayo ClinicRochesterMinnesotaUSA
| | - Jose S. Pulido
- Department of OphthalmologyMayo ClinicRochesterMinnesotaUSA
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31
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Gonzalez de Torre I, Weber M, Quintanilla L, Alonso M, Jockenhoevel S, Rodríguez Cabello JC, Mela P. Hybrid elastin-like recombinamer-fibrin gels: physical characterization and in vitro evaluation for cardiovascular tissue engineering applications. Biomater Sci 2018; 4:1361-70. [PMID: 27430365 DOI: 10.1039/c6bm00300a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In the field of tissue engineering, the properties of the scaffolds are of crucial importance for the success of the application. Hybrid materials combine the properties of the different components that constitute them. In this study hybrid gels of Elastin-Like Recombinamer (ELR) and fibrin were prepared with a range of polymer concentrations and ELR-to-fibrin ratios. The correlation between SEM micrographs, porosities, swelling ratios and rheological properties was discussed and a poroelastic mechanism was suggested to explain the mechanical behavior of the hybrid gels. Applicability as scaffold materials for cardiovascular tissue engineering was shown by the realization of cell-laden matrixes which supported the synthesis of collagens as revealed by immunohistochemical analysis. As a proof of concept, a tissue-engineered heart valve was fabricated by injection moulding and cultivated in a bioreactor for 3 weeks under dynamic conditions. Tissue analysis revealed the production of collagen I and III, fundamental proteins for cardiovascular constructs.
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Affiliation(s)
- Israel Gonzalez de Torre
- BIOFORGE, CIBER-BBN, Campus "Miguel Delibes" Edificio LUCIA, Universidad de Valladolid, Paseo Belén 19, 47011, Valladolid, Spain and TECHNICAL PROTEINS NANOBIOTECHNOLOGY S.L., Campus "Miguel Delibes" Edificio CTTA, Universidad de Valladolid, Paseo Belén 9A, 47011, Valladolid, Spain
| | - Miriam Weber
- Tissue Engineering and Textile Implants, AME, Helmholtz Institute, RWTH Aachen University, Pauwelsstr. 20, 52074 Aachen, Germany
| | - Luis Quintanilla
- BIOFORGE, CIBER-BBN, Campus "Miguel Delibes" Edificio LUCIA, Universidad de Valladolid, Paseo Belén 19, 47011, Valladolid, Spain
| | - Matilde Alonso
- BIOFORGE, CIBER-BBN, Campus "Miguel Delibes" Edificio LUCIA, Universidad de Valladolid, Paseo Belén 19, 47011, Valladolid, Spain
| | - Stefan Jockenhoevel
- Tissue Engineering and Textile Implants, AME, Helmholtz Institute, RWTH Aachen University, Pauwelsstr. 20, 52074 Aachen, Germany
| | - José Carlos Rodríguez Cabello
- BIOFORGE, CIBER-BBN, Campus "Miguel Delibes" Edificio LUCIA, Universidad de Valladolid, Paseo Belén 19, 47011, Valladolid, Spain
| | - Petra Mela
- Tissue Engineering and Textile Implants, AME, Helmholtz Institute, RWTH Aachen University, Pauwelsstr. 20, 52074 Aachen, Germany
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32
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Gandhi JK, Manzar Z, Bachman LA, Andrews-Pfannkoch C, Knudsen T, Hill M, Schmidt H, Iezzi R, Pulido JS, Marmorstein AD. Fibrin hydrogels as a xenofree and rapidly degradable support for transplantation of retinal pigment epithelium monolayers. Acta Biomater 2018; 67:134-146. [PMID: 29233750 DOI: 10.1016/j.actbio.2017.11.058] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 11/15/2017] [Accepted: 11/30/2017] [Indexed: 02/08/2023]
Abstract
Recent phase 1 trials of embryonic stem cell and induced pluripotent stem cell (iPSCs) derived RPE transplants for the treatment of macular degeneration have demonstrated the relative safety of this process. However, there is concern over clumping, thickening, folding, and wrinkling of the transplanted RPE. To deliver a flat RPE monolayer, current phase 1 trials are testing synthetic substrates for RPE transplantation. These substrates, however, cause localized inflammation and fibrosis in animal models due to long degradation times. Here we describe the use of thin fibrin hydrogels as a support material for the transplantation of RPE. Fibrin was formed into a mechanically rigid support that allow for easy manipulation with standard surgical instruments. Using fibrinolytic enzymes, fibrin hydrogels were degraded on the scale of hours. The rate of degradation could be controlled by varying the fibrinolytic enzyme concentration used. RPE cells degraded fibrin spontaneously. To preserve the fibrin support during differentiation of iPSCs to RPE, media was supplemented with the protease inhibitor aprotinin. iPSC-RPE on fibrin gels remained viable, generated monolayers with characteristic cobblestone appearance and dark pigmentation, and expressed mRNA and protein markers characteristic of RPE in the eye. Following differentiation of the cells, addition of fibrinolytic enzymes fully and rapidly degraded the fibrin support leaving behind an intact, viable iPSC-RPE monolayer. In conclusion, human fibrin hydrogels provide a xeno-free support on which iPSCs can be differentiated to RPE cells for transplant which can be rapidly degraded under controlled conditions using fibrinolytic enzymes without adverse effects to the cells. STATEMENT OF SIGNIFICANCE Stem cell-derived retinal pigment epithelial (RPE) cell transplantation is currently in phase 1 clinical trials for macular degeneration (MD). A major obstacle in these studies is delivering the RPE as a living, flat sheets without leaving behind foreign materials in the retina. Here we investigate the suitability of using hydrogels made from human blood-derived proteins for RPE transplant. Our data shows that these fibrin hydrogels are rigid enough for use in surgery, support growth of stem cell-derived RPE, and are easily degraded within hours without damage to the RPE sheet. These fibrin hydrogels offer a promising solution to transplant RPE for patients with MD.
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Noori A, Ashrafi SJ, Vaez-Ghaemi R, Hatamian-Zaremi A, Webster TJ. A review of fibrin and fibrin composites for bone tissue engineering. Int J Nanomedicine 2017; 12:4937-4961. [PMID: 28761338 PMCID: PMC5516781 DOI: 10.2147/ijn.s124671] [Citation(s) in RCA: 262] [Impact Index Per Article: 37.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Tissue engineering has emerged as a new treatment approach for bone repair and regeneration seeking to address limitations associated with current therapies, such as autologous bone grafting. While many bone tissue engineering approaches have traditionally focused on synthetic materials (such as polymers or hydrogels), there has been a lot of excitement surrounding the use of natural materials due to their biologically inspired properties. Fibrin is a natural scaffold formed following tissue injury that initiates hemostasis and provides the initial matrix useful for cell adhesion, migration, proliferation, and differentiation. Fibrin has captured the interest of bone tissue engineers due to its excellent biocompatibility, controllable biodegradability, and ability to deliver cells and biomolecules. Fibrin is particularly appealing because its precursors, fibrinogen, and thrombin, which can be derived from the patient's own blood, enable the fabrication of completely autologous scaffolds. In this article, we highlight the unique properties of fibrin as a scaffolding material to treat bone defects. Moreover, we emphasize its role in bone tissue engineering nanocomposites where approaches further emulate the natural nanostructured features of bone when using fibrin and other nanomaterials. We also review the preparation methods of fibrin glue and then discuss a wide range of fibrin applications in bone tissue engineering. These include the delivery of cells and/or biomolecules to a defect site, distributing cells, and/or growth factors throughout other pre-formed scaffolds and enhancing the physical as well as biological properties of other biomaterials. Thoughts on the future direction of fibrin research for bone tissue engineering are also presented. In the future, the development of fibrin precursors as recombinant proteins will solve problems associated with using multiple or single-donor fibrin glue, and the combination of nanomaterials that allow for the incorporation of biomolecules with fibrin will significantly improve the efficacy of fibrin for numerous bone tissue engineering applications.
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Affiliation(s)
- Alireza Noori
- Department of Tissue Engineering and Applied Cell Sciences, Faculty of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran
| | | | - Roza Vaez-Ghaemi
- Department of Chemical and Biological Engineering, Faculty of Biomedical Engineering, The University of British Columbia, Vancouver, BC, Canada
| | | | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
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Amensag S, Goldberg L, O'Malley KA, Rush DS, Berceli SA, McFetridge PS. Pilot assessment of a human extracellular matrix-based vascular graft in a rabbit model. J Vasc Surg 2017; 65:839-847.e1. [PMID: 27139784 PMCID: PMC5086323 DOI: 10.1016/j.jvs.2016.02.046] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 02/12/2016] [Indexed: 02/03/2023]
Abstract
BACKGROUND Herein we describe a small-diameter vascular graft constructed from rolled human amniotic membrane (hAM), with in vitro evaluation and subsequent in vivo assessment of its mechanical and initial biologic viability in the early postimplantation period. This approach for graft construction allows customization of graft dimensions, with wide-ranging potential clinical applicability as a nonautologous, allogeneic, cell-free graft material. METHODS Acellular hAMs were rolled into layered conduits (3.2-mm diameter) that were bound with fibrin and lyophilized. Constructs were seeded with human smooth muscle cells and cultured under controlled arterial hemodynamic conditions in vitro. Additionally, the acellular hAM conduits were surgically implanted as arterial interposition grafts into the carotid arteries of immunocompetent rabbits. RESULTS On in vitro analysis, smooth muscle cells were shown to adhere to, proliferate within, and remodel the scaffold during a 4-week culture period. At the end of the culture period, there was histologic and biomechanical evidence of graft wall layer coalescence. In vivo analysis demonstrated graft patency after 4 weeks (n = 3), with no hyperacute rejection or thrombotic occlusion. Explants displayed histologic evidence of active cellular remodeling, with endogenous cell repopulation of the graft wall concurrent with degradation of initial graft material. Cells were shown to align circumferentially to resemble a vascular medial layer. CONCLUSIONS The vascular grafts were shown to provide a supportive scaffold allowing cellular infiltration and remodeling by host cell populations in vivo. By use of this approach, "off-the-shelf" vascular grafts can be created with specified diameters and wall thicknesses to satisfy specific anatomic requirements in diverse populations of patients.
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Affiliation(s)
- Salma Amensag
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, JG-56 Biomedical Sciences Building, Gainesville, FL 32611-6131
| | - Leslie Goldberg
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, JG-56 Biomedical Sciences Building, Gainesville, FL 32611-6131
| | - Kerri A. O'Malley
- Malcom Randall Veterans Affairs Medical Center and the Division of Vascular and Endovascular Surgery, University of Florida College of Medicine, Gainesville, FL
| | - Demaretta S. Rush
- Department of Pathology, College of Medicine, University of Florida, Gainesville, Florida, USA
| | - Scott A. Berceli
- Malcom Randall Veterans Affairs Medical Center and the Division of Vascular and Endovascular Surgery, University of Florida College of Medicine, Gainesville, FL
| | - Peter S. McFetridge
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, JG-56 Biomedical Sciences Building, Gainesville, FL 32611-6131
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Moreira R, Neusser C, Kruse M, Mulderrig S, Wolf F, Spillner J, Schmitz-Rode T, Jockenhoevel S, Mela P. Tissue-Engineered Fibrin-Based Heart Valve with Bio-Inspired Textile Reinforcement. Adv Healthc Mater 2016; 5:2113-21. [PMID: 27377438 DOI: 10.1002/adhm.201600300] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 04/28/2016] [Indexed: 12/12/2022]
Abstract
The mechanical properties of tissue-engineered heart valves still need to be improved to enable their implantation in the systemic circulation. The aim of this study is to develop a tissue-engineered valve for the aortic position - the BioTexValve - by exploiting a bio-inspired composite textile scaffold to confer native-like mechanical strength and anisotropy to the leaflets. This is achieved by multifilament fibers arranged similarly to the collagen bundles in the native aortic leaflet, fixed by a thin electrospun layer directly deposited on the pattern. The textile-based leaflets are positioned into a 3D mould where the components to form a fibrin gel containing human vascular smooth muscle cells are introduced. Upon fibrin polymerization, a complete valve is obtained. After 21 d of maturation by static and dynamic stimulation in a custom-made bioreactor, the valve shows excellent functionality under aortic pressure and flow conditions, as demonstrated by hydrodynamic tests performed according to ISO standards in a mock circulation system. The leaflets possess remarkable burst strength (1086 mmHg) while remaining pliable; pronounced extracellular matrix production is revealed by immunohistochemistry and biochemical assay. This study demonstrates the potential of bio-inspired textile-reinforcement for the fabrication of functional tissue-engineered heart valves for the aortic position.
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Affiliation(s)
- Ricardo Moreira
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
| | - Christine Neusser
- Institute for Textile Engineering; RWTH Aachen University; Otto-Blumenthal-Str. 1 52074 Aachen Germany
| | - Magnus Kruse
- Institute for Textile Engineering; RWTH Aachen University; Otto-Blumenthal-Str. 1 52074 Aachen Germany
| | - Shane Mulderrig
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
| | - Frederic Wolf
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
| | - Jan Spillner
- Department for Cardiothoracic- and Vascular Surgery; University Hospital RWTH Aachen; Pauwelsstr. 30 52074 Aachen Germany
| | - Thomas Schmitz-Rode
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
| | - Stefan Jockenhoevel
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
- Institute for Textile Engineering; RWTH Aachen University; Otto-Blumenthal-Str. 1 52074 Aachen Germany
- Department of Tissue Engineering and Textile Implants; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
| | - Petra Mela
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
- Department of Tissue Engineering and Textile Implants; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
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Köpf M, Campos DFD, Blaeser A, Sen KS, Fischer H. A tailored three-dimensionally printable agarose-collagen blend allows encapsulation, spreading, and attachment of human umbilical artery smooth muscle cells. Biofabrication 2016; 8:025011. [PMID: 27205890 DOI: 10.1088/1758-5090/8/2/025011] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In recent years, novel biofabrication technologies have enabled the rapid manufacture of hydrogel-cell suspensions into tissue-imitating constructs. The development of novel materials for biofabrication still remains a challenge due to a gap between contradicting requirements such as three-dimensional printability and optimal cytocompatibility. We hypothesise that blending of different hydrogels could lead to a novel material with favourable biological and printing properties. In our work, we combined agarose and type I collagen in order to develop a hydrogel blend capable of long-term cell encapsulation of human umbilical artery smooth muscle cells (HUASMCs) and 3D drop-on-demand printing. Different blends were prepared with 0.25%, 0.5%, 0.75%, and 1.5% agarose and 0.2% type I collagen. The cell morphology of HUASMCs and the printing accuracy were assessed for each agarose-collagen combination, keeping the content of collagen constant. The hydrogel blend which displayed sufficient cell spreading and printing accuracy (0.5% agarose, 0.2% type I collagen, AGR0.5COLL0.2) was then characterised based on swelling and degradation over 21 days and mechanical stiffness. The cellular response regarding cell attachment of HUASMCs embedded in the hydrogel blend was further studied using SEM, TEM, and TPLSM. Printing trials were fabricated in a drop-on-demand printing process. The swelling and degradation evaluation showed an average of 20% mass loss and less than 10% swelling. AGR0.5COLL0.2 exhibited significant increase in stiffness compared to pure agarose and type I collagen. In addition, columns of AGR0.5COLL0.2 three centimeters in height were successfully printed submerged in cooled perfluorocarbon, proving the intrinsic printability of the hydrogel blend. Ultimately, a promising novel hydrogel blend showing cell spreading and attachment as well as suitability for bioprinting was identified and could, for example, serve in the manufacture of in vitro 3D models to capture more complex features of disease and drug discovery.
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Affiliation(s)
- Marius Köpf
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Pauwelsstrasse 30, D-52074 Aachen, Germany
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Chan EC, Kuo SM, Kong AM, Morrison WA, Dusting GJ, Mitchell GM, Lim SY, Liu GS. Three Dimensional Collagen Scaffold Promotes Intrinsic Vascularisation for Tissue Engineering Applications. PLoS One 2016; 11:e0149799. [PMID: 26900837 PMCID: PMC4762944 DOI: 10.1371/journal.pone.0149799] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 02/04/2016] [Indexed: 12/30/2022] Open
Abstract
Here, we describe a porous 3-dimensional collagen scaffold material that supports capillary formation in vitro, and promotes vascularization when implanted in vivo. Collagen scaffolds were synthesized from type I bovine collagen and have a uniform pore size of 80 μm. In vitro, scaffolds seeded with primary human microvascular endothelial cells suspended in human fibrin gel formed CD31 positive capillary-like structures with clear lumens. In vivo, after subcutaneous implantation in mice, cell-free collagen scaffolds were vascularized by host neovessels, whilst a gradual degradation of the scaffold material occurred over 8 weeks. Collagen scaffolds, impregnated with human fibrinogen gel, were implanted subcutaneously inside a chamber enclosing the femoral vessels in rats. Angiogenic sprouts from the femoral vessels invaded throughout the scaffolds and these degraded completely after 4 weeks. Vascular volume of the resulting constructs was greater than the vascular volume of constructs from chambers implanted with fibrinogen gel alone (42.7±5.0 μL in collagen scaffold vs 22.5±2.3 μL in fibrinogen gel alone; p<0.05, n = 7). In the same model, collagen scaffolds seeded with human adipose-derived stem cells (ASCs) produced greater increases in vascular volume than did cell-free collagen scaffolds (42.9±4.0 μL in collagen scaffold with human ASCs vs 25.7±1.9 μL in collagen scaffold alone; p<0.05, n = 4). In summary, these collagen scaffolds are biocompatible and could be used to grow more robust vascularized tissue engineering grafts with improved the survival of implanted cells. Such scaffolds could also be used as an assay model for studies on angiogenesis, 3-dimensional cell culture, and delivery of growth factors and cells in vivo.
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Affiliation(s)
- Elsa C. Chan
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Victoria, Australia
- Ophthalmology, Department of Surgery, University of Melbourne, East Melbourne, Victoria, Australia
| | - Shyh-Ming Kuo
- Department of Biomedical Engineering, I-Shou University, Kaohsiung, Taiwan
| | - Anne M. Kong
- O’Brien Institute Department, St Vincent’s Institute of Medical Research, Fitzroy, Victoria, Australia
| | - Wayne A. Morrison
- O’Brien Institute Department, St Vincent’s Institute of Medical Research, Fitzroy, Victoria, Australia
- Department of Surgery, University of Melbourne, St Vincent’s Hospital Melbourne, Fitzroy, Victoria, Australia
- Faculty of Health Sciences, Australian Catholic University, Fitzroy, Victoria, Australia
| | - Gregory J. Dusting
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Victoria, Australia
- Ophthalmology, Department of Surgery, University of Melbourne, East Melbourne, Victoria, Australia
- O’Brien Institute Department, St Vincent’s Institute of Medical Research, Fitzroy, Victoria, Australia
| | - Geraldine M. Mitchell
- O’Brien Institute Department, St Vincent’s Institute of Medical Research, Fitzroy, Victoria, Australia
- Department of Surgery, University of Melbourne, St Vincent’s Hospital Melbourne, Fitzroy, Victoria, Australia
- Faculty of Health Sciences, Australian Catholic University, Fitzroy, Victoria, Australia
| | - Shiang Y. Lim
- O’Brien Institute Department, St Vincent’s Institute of Medical Research, Fitzroy, Victoria, Australia
- Department of Surgery, University of Melbourne, St Vincent’s Hospital Melbourne, Fitzroy, Victoria, Australia
- * E-mail: (GSL); (SYL)
| | - Guei-Sheung Liu
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, East Melbourne, Victoria, Australia
- Ophthalmology, Department of Surgery, University of Melbourne, East Melbourne, Victoria, Australia
- * E-mail: (GSL); (SYL)
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Weber M, Gonzalez de Torre I, Moreira R, Frese J, Oedekoven C, Alonso M, Rodriguez Cabello CJ, Jockenhoevel S, Mela P. Multiple-Step Injection Molding for Fibrin-Based Tissue-Engineered Heart Valves. Tissue Eng Part C Methods 2015; 21:832-40. [PMID: 25654448 PMCID: PMC4523041 DOI: 10.1089/ten.tec.2014.0396] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Heart valves are elaborate and highly heterogeneous structures of the circulatory system. Despite the well accepted relationship between the structural and mechanical anisotropy and the optimal function of the valves, most approaches to create tissue-engineered heart valves (TEHVs) do not try to mimic this complexity and rely on one homogenous combination of cells and materials for the whole construct. The aim of this study was to establish an easy and versatile method to introduce spatial diversity into a heart valve fibrin scaffold. We developed a multiple-step injection molding process that enables the fabrication of TEHVs with heterogeneous composition (cell/scaffold material) of wall and leaflets without the need of gluing or suturing components together, with the leaflets firmly connected to the wall. The integrity of the valves and their functionality was proved by either opening/closing cycles in a bioreactor (proof of principle without cells) or with continuous stimulation over 2 weeks. We demonstrated the potential of the method by the two-step molding of the wall and the leaflets containing different cell lines. Immunohistology after stimulation confirmed tissue formation and demonstrated the localization of the different cell types. Furthermore, we showed the proof of principle fabrication of valves using different materials for wall (fibrin) and leaflets (hybrid gel of fibrin/elastin-like recombinamer) and with layered leaflets. The method is easy to implement, does not require special facilities, and can be reproduced in any tissue-engineering lab. While it has been demonstrated here with fibrin, it can easily be extended to other hydrogels.
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Affiliation(s)
- Miriam Weber
- 1 Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany
| | | | - Ricardo Moreira
- 1 Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany
| | - Julia Frese
- 1 Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany
| | - Caroline Oedekoven
- 1 Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany
| | - Matilde Alonso
- 2 G.I.R. Bioforge, University of Valladolid , CIBER-BBN, Valladolid, Spain
| | | | - Stefan Jockenhoevel
- 1 Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany .,3 Institut für Textiltecknik, RWTH Aachen University , Aachen, Germany
| | - Petra Mela
- 1 Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University , Aachen, Germany
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Lau S, Schrimpf C, Klingenberg M, Helfritz F, Aper T, Haverich A, Wilhelmi M, Böer U. Evaluation of autologous tissue sources for the isolation of endothelial cells and adipose tissue-derived mesenchymal stem cells to pre-vascularize tissue-engineered vascular grafts. ACTA ACUST UNITED AC 2015. [DOI: 10.1515/bnm-2015-0014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractCurrently used synthetic vascular grafts bear a high infection risk due to insufficient microvascularization of the graft wall disabling the infiltration of immune cells. Tissue-engineered grafts with a functional pre-vascularization thus would be desirable. However, autologous tissue sources for capillary forming cells need to be evaluated. Here, peripheral blood outgrowth endothelial cells (PB-OEC) from 17 healthy donors and pericyte-like mesenchymal stem cells derived from adipose tissue (ASC) of 17 patients scheduled for visceral surgery were characterized and investigated regarding their ability to form capillary-like networks in plasma-derived fibrin gels. To obtain proliferating PB-OEC with endothelial cell-specific properties (CD31-, VE-cadherin-expression, ac-LDL uptake and three-dimensional (3D)-tube formation in fibrin gels) both enrichment of CD34
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Moreira R, Gesche VN, Hurtado-Aguilar LG, Schmitz-Rode T, Frese J, Jockenhoevel S, Mela P. TexMi: development of tissue-engineered textile-reinforced mitral valve prosthesis. Tissue Eng Part C Methods 2014; 20:741-8. [PMID: 24665896 PMCID: PMC4152780 DOI: 10.1089/ten.tec.2013.0426] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 01/06/2014] [Indexed: 01/13/2023] Open
Abstract
Mitral valve regurgitation together with aortic stenosis is the most common valvular heart disease in Europe and North America. Mechanical and biological prostheses available for mitral valve replacement have significant limitations such as the need of a long-term anticoagulation therapy and failure by calcifications. Both types are unable to remodel, self-repair, and adapt to the changing hemodynamic conditions. Moreover, they are mostly designed for the aortic position and do not reproduce the native annular-ventricular continuity, resulting in suboptimal hemodynamics, limited durability, and gradually decreasing ventricular pumping efficiency. A tissue-engineered heart valve specifically designed for the mitral position has the potential to overcome the limitations of the commercially available substitutes. For this purpose, we developed the TexMi, a living textile-reinforced mitral valve, which recapitulates the key elements of the native one: annulus, asymmetric leaflets (anterior and posterior), and chordae tendineae to maintain the native annular-ventricular continuity. The tissue-engineered valve is based on a composite scaffold consisting of the fibrin gel as a cell carrier and a textile tubular structure with the twofold task of defining the gross three-dimensional (3D) geometry of the valve and conferring mechanical stability. The TexMi valves were molded with ovine umbilical vein cells and stimulated under dynamic conditions for 21 days in a custom-made bioreactor. Histological and immunohistological stainings showed remarkable tissue development with abundant aligned collagen fibers and elastin deposition. No cell-mediated tissue contraction occurred. This study presents the proof-of-principle for the realization of a tissue-engineered mitral valve with a simple and reliable injection molding process readily adaptable to the patient's anatomy and pathological situation by producing a patient-specific rapid prototyped mold.
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Affiliation(s)
- Ricardo Moreira
- Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | | | - Luis G. Hurtado-Aguilar
- Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Thomas Schmitz-Rode
- Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Julia Frese
- Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
| | - Stefan Jockenhoevel
- Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
- Institut für Textiltechnik, RWTH Aachen University, Aachen, Germany
| | - Petra Mela
- Department of Tissue Engineering and Textile Implants, Institute of Applied Medical Engineering, Helmholtz Institute, RWTH Aachen University, Aachen, Germany
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Woods I, Flanagan TC. Electrospinning of biomimetic scaffolds for tissue-engineered vascular grafts: threading the path. Expert Rev Cardiovasc Ther 2014; 12:815-32. [PMID: 24903895 DOI: 10.1586/14779072.2014.925397] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Tissue-engineered vascular grafts (TEVGs) offer an alternative to synthetic grafts for the surgical treatment of atherosclerosis and congenital heart defects, and may improve graft patency and patient outcomes after implantation. Electrospinning is a versatile manufacturing process for the production of fibrous scaffolds. This review aims to investigate novel approaches undertaken to improve the design of electrospun scaffolds for TEVG development. The review describes how electrospinning can be adapted to produce aligned nanofibrous scaffolds used in vascular tissue engineering, while novel processes for improved performance of such scaffolds are examined and compared to evaluate their effectiveness and potential. By highlighting new drug delivery techniques and porogenic technologies, in addition to analyzing in vitro and in vivo testing of electrospun TEVGs, it is hoped that this review will provide guidance on how the next generation of electrospun vascular graft scaffolds will be designed and tested for the potential improvement of cardiovascular therapies.
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Affiliation(s)
- Ian Woods
- School of Medicine & Medical Science, Health Sciences Centre, University College Dublin, Belfield, Dublin 4, Ireland
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Weinandy S, Laffar S, Unger RE, Flanagan TC, Loesel R, Kirkpatrick CJ, van Zandvoort M, Hermanns-Sachweh B, Dreier A, Klee D, Jockenhoevel S. Biofunctionalized microfiber-assisted formation of intrinsic three-dimensional capillary-like structures. Tissue Eng Part A 2014; 20:1858-69. [PMID: 24456033 DOI: 10.1089/ten.tea.2013.0330] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES A vascular supply network is essential in engineered tissues >100-200-μm thickness. To control vascular network formation in vitro, we hypothesize that capillarization can be achieved locally by using fibers to position and guide vessel-forming endothelial cells within a three-dimensional (3D) matrix. MATERIALS AND METHODS Biofunctionalization of poly-(L-lactic acid) (PLLA) fibers was performed by amino-functionalization and covalent binding of RGD peptides. Human foreskin fibroblasts (HFFs) and human umbilical vein endothelial cells (HUVECs) were seeded on the fibers in a mould and subsequently embedded in fibrin gel. After 9-21 days of coculture, constructs were fixed and immunostained (PECAM-1). Capillary-like structures with lumen in the 3D fibrin matrix were verified and quantified using two-photon microscopy and image analysis software. RESULTS Capillary-like networks with lumen formed adjacent to the PLLA fibers. Increased cell numbers were observed to attach to RGD-functionalized fibers, resulting in enhanced formation of capillary-like structures. Cocultivation of HFFs sufficiently supported HUVECs in the formation of capillary-like structures, which persisted for at least 21 days of coculture. CONCLUSIONS The guidance of vessel growth within tissue-engineered constructs can be achieved using biofunctionalized PLLA microfibers. Further methods are warranted to perform specified spatial positioning of fibers within 3D formative scaffolds to enhance the applicability of the concept.
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Affiliation(s)
- Stefan Weinandy
- 1 Department of Tissue Engineering and Textile Implants, AME-Helmholtz Institute for Biomedical Engineering, RWTH Aachen University , Aachen, Germany
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Wilhelmi M, Jockenhoevel S, Mela P. Bioartificial fabrication of regenerating blood vessel substitutes: requirements and current strategies. ACTA ACUST UNITED AC 2014; 59:185-95. [DOI: 10.1515/bmt-2013-0112] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 02/03/2014] [Indexed: 11/15/2022]
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Tubular woven narrow fabrics for replacement of cruciate ligaments. Ann Biomed Eng 2013; 41:1950-6. [PMID: 23568153 DOI: 10.1007/s10439-013-0806-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Accepted: 04/04/2013] [Indexed: 10/27/2022]
Abstract
The human knee is one of the most frequently injured joints. More than half of these injuries are related to a failure of the anterior cruciate ligament. Current treatments (allogeneic and autologous) bear several disadvantages which can be overcome through the use of synthetic structures. Within the scope of this paper the potential of tubular woven fabrics for the use as artificial ligaments has been evaluated. Twelve fabrics made of polyethylene terephthalate and polytetrafluoroethylene were produced using shuttle weaving technology. Mechanical and biological properties of the fabrics were assessed using static tensile testing and cytotoxicity assays. The results obtained within this study show that woven tubular fabrics can be potentially used as artificial ligament structures as they can provide the desired medical and mechanical properties for cruciate ligament replacements. Through the choice of material and weaving parameters the fabrics' tensile properties can imitate the stress-strain characteristic of the human cruciate ligament. Further assessments in terms of cyclic loading behavior and abrasion resistance of the material are needed to evaluate the success in long term implantation.
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Gugutkov D, Gustavsson J, Ginebra MP, Altankov G. Fibrinogen nanofibers for guiding endothelial cell behavior. Biomater Sci 2013; 1:1065-1073. [DOI: 10.1039/c3bm60124b] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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