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Walsh T, Hadisi Z, Dabiri SMH, Hasanpour S, Samimi S, Azimzadeh M, Akbari M. Facile roll-to-roll production of nanoporous fiber coatings for advanced wound care sutures. NANOSCALE 2024; 16:15615-15628. [PMID: 39110148 DOI: 10.1039/d4nr01432d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
Theranostic sutures are derived from innovative ideas to enhance wound healing results by adding wound diagnostics and therapeutics to typical sutures by functionalizing them with additional materials. Here, we present a new direct electrospinning method for the fast, continuous, inexpensive, and high-throughput production of versatile nanofibrous-coated suture threads, with precise control over various essential microstructural and physical characteristics. The thickness of the coating layer and the alignment of nanofibers with the thread's direction can be adjusted by the user by varying the spooling speed and the displacement between the spinneret needle and thread. To show the flexibility of our method for a range of different materials selected, gelatin, polycaprolactone, silk fibroin, and PEDOT:PSS (poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate)) were the resultant nanofibers characterized by scanning electron microscopy (SEM) imaging and conductivity tests. In a series of in vitro and ex vivo tests (pig skin), sutures were successfully tested for their flexibility and mechanical properties when used as weaving and knotting sutures, and their biocompatibility with a keratinocyte cell line. For temperature-based drug-releasing tests, two fluorescent molecules as drug models with high and low molecular weight, namely fluorescein isothiocyanate-dextran (20 kDa) and rhodamine B (470 Da), were used, and their steady release with incremental increase of temperature to 37 °C over 120 min was seen, which is appropriate for bacterial treatment drugs. Given the advantages of the presented technique, it seems to have promising potential to be used in future medical applications for wound closure and bacterial infection treatment via a temperature-triggered drug release strategy.
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Affiliation(s)
- Tavia Walsh
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC V8W 2Y2, Canada
| | - Zhina Hadisi
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC V8W 2Y2, Canada
| | - Seyed Mohammad Hossein Dabiri
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC V8W 2Y2, Canada
| | - Sadegh Hasanpour
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC V8W 2Y2, Canada
| | - Sadaf Samimi
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC V8W 2Y2, Canada
| | - Mostafa Azimzadeh
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC V8W 2Y2, Canada
| | - Mohsen Akbari
- Laboratory for Innovations in Microengineering (LiME), Department of Mechanical Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada.
- Center for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, Victoria, BC V8W 2Y2, Canada
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Sedláková V, Mourcos S, Pupkaitė J, Lunn Y, Visintini S, Guzman-Soto I, Ruel M, Suuronen E, Alarcon EI. Biomaterials for direct cardiac repair-A rapid scoping review 2012-2022. Acta Biomater 2024; 180:61-81. [PMID: 38588997 DOI: 10.1016/j.actbio.2024.04.008] [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: 12/05/2023] [Revised: 03/13/2024] [Accepted: 04/03/2024] [Indexed: 04/10/2024]
Abstract
A plethora of biomaterials for heart repair are being tested worldwide for potential clinical application. These therapeutics aim to enhance the quality of life of patients with heart disease using various methods to improve cardiac function. Despite the myriad of therapeutics tested, only a minority of these studied biomaterials have entered clinical trials. This rapid scoping review aims to analyze literature available from 2012 to 2022 with a focus on clinical trials using biomaterials for direct cardiac repair, i.e., where the intended function of the biomaterial is to enhance the repair of the endocardium, myocardium, epicardium or pericardium. This review included neither biomaterials related to stents and valve repair nor biomaterials serving as vehicles for the delivery of drugs. Surprisingly, the literature search revealed that only 8 different biomaterials mentioned in 23 different studies out of 7038 documents (journal articles, conference abstracts or clinical trial entries) have been tested in clinical trials since 2012. All of these, intended to treat various forms of ischaemic heart disease (heart failure, myocardial infarction), were of natural origin and most used direct injections as their delivery method. This review thus reveals notable gaps between groups of biomaterials tested pre-clinically and clinically. STATEMENT OF SIGNIFICANCE: Rapid scoping review of clinical application of biomaterials for cardiac repair. 7038 documents screened; 23 studies mention 8 different biomaterials only. Biomaterials for repair of endocardium, myocardium, epicardium or pericardium. Only 8 different biomaterials entered clinical trials in the past 10 years. All of the clinically translated biomaterials were of natural origin.
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Affiliation(s)
- Veronika Sedláková
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Kamenice 753/5, Brno 625 00, Czechia.
| | - Sophia Mourcos
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada; Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada; Department of Biomedical Science, Faculty of Science, University of Ottawa, 150 Louis-Pasteur Private, Ottawa, Ontario K1N 9A7, Canada
| | - Justina Pupkaitė
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada
| | - Yvonne Lunn
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada; Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada; Department of Biochemistry, Microbiology, and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario K1H 8M5, Canada
| | - Sarah Visintini
- Berkman Library, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada
| | - Irene Guzman-Soto
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada
| | - Marc Ruel
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada; Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada
| | - Erik Suuronen
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada; Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada; Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario K1H 8M5, Canada
| | - Emilio I Alarcon
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada; Division of Cardiac Surgery, University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, Ontario K1Y 4W7, Canada; Department of Biochemistry, Microbiology, and Immunology, Faculty of Medicine, University of Ottawa, 451 Smyth Road, Ottawa, Ontario K1H 8M5, Canada.
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3
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Syed Mohamed SMD, Welsh GI, Roy I. Renal tissue engineering for regenerative medicine using polymers and hydrogels. Biomater Sci 2023; 11:5706-5726. [PMID: 37401545 DOI: 10.1039/d3bm00255a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2023]
Abstract
Chronic Kidney Disease (CKD) is a growing worldwide problem, leading to end-stage renal disease (ESRD). Current treatments for ESRD include haemodialysis and kidney transplantation, but both are deemed inadequate since haemodialysis does not address all other kidney functions, and there is a shortage of suitable donor organs for transplantation. Research in kidney tissue engineering has been initiated to take a regenerative medicine approach as a potential treatment alternative, either to develop effective cell therapy for reconstruction or engineer a functioning bioartificial kidney. Currently, renal tissue engineering encompasses various materials, mainly polymers and hydrogels, which have been chosen to recreate the sophisticated kidney architecture. It is essential to address the chemical and mechanical aspects of the materials to ensure they can support cell development to restore functionality and feasibility. This paper reviews the types of polymers and hydrogels that have been used in kidney tissue engineering applications, both natural and synthetic, focusing on the processing and formulation used in creating bioactive substrates and how these biomaterials affect the cell biology of the kidney cells used.
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Affiliation(s)
| | - Gavin I Welsh
- Renal Bristol, Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol BS1 3NY, UK
| | - Ipsita Roy
- Department of Materials Science and Engineering, Faculty of Engineering, University of Sheffield, Sheffield S37HQ, UK.
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Gabriel M, Bollensdorff C, Raynaud CM. Surface Modification of Polytetrafluoroethylene and Polycaprolactone Promoting Cell-Selective Adhesion and Growth of Valvular Interstitial Cells. J Funct Biomater 2022; 13:jfb13020070. [PMID: 35735925 PMCID: PMC9225263 DOI: 10.3390/jfb13020070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Revised: 05/20/2022] [Accepted: 05/26/2022] [Indexed: 01/27/2023] Open
Abstract
Tissue engineering concepts, which are concerned with the attachment and growth of specific cell types, frequently employ immobilized ligands that interact preferentially with cell types of interest. Creating multicellular grafts such as heart valves calls for scaffolds with spatial control over the different cells involved. Cardiac heart valves are mainly constituted out of two cell types, endothelial cells and valvular interstitial cells. To have control over where which cell type can be attracted would enable targeted cell settlement and growth contributing to the first step of an engineered construct. For endothelial cells, constituting the outer lining of the valve tissue, several specific peptide ligands have been described. Valvular interstitial cells, representing the bulk of the leaflet, have not been investigated in this regard. Two receptors, the integrin α9β1 and CD44, are known to be highly expressed on valvular interstitial cells. Here, we demonstrate that by covalently grafting the corresponding peptide and polysaccharide ligand onto an erodible, polycaprolactone (PCL), and a non-degradable, polytetrafluoroethylene (PTFE), polymer, surfaces were generated that strongly support valvular interstitial cell colonization with minimal endothelial cell and reduced platelet adhesion. The technology for covalent binding of corresponding ligands is a key element towards tissue engineered cardiac valves for in vitro applications, but also towards future in vivo application, especially in combination with degradable scaffold material.
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Affiliation(s)
- Matthias Gabriel
- Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, 14197 Berlin, Germany
- Correspondence: ; Tel.: +49-3-450-562224
| | | | - Christophe Michel Raynaud
- Pediatric Cancer Omics Lab., Cancer Group, Research Branch, Sidra Medicine, Doha P.O. Box 26999, Qatar;
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Wang CC, Wei SC, Luo SC. Recent Advances and Biomedical Applications of Peptide-Integrated Conducting Polymers. ACS APPLIED BIO MATERIALS 2022; 5:1916-1933. [PMID: 35119258 DOI: 10.1021/acsabm.1c01194] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Conducting polymers (CPs) are of great interests to researchers around the world in biomedical applications owing to their unique electrical and mechanical properties. Besides, they are easy to fabricate and have long-term stability. These features make CPs a powerful building block of modern biomaterials. Peptide functionalization has been a versatile tool for the development of CP-based biomaterials. With the aid of peptide modifications, the biocompatibility, target selectivity, and cellular interactions of CPs can be greatly improved. Reflecting these aspects, an increasing number of studies on peptide-integrated conducting polymers have been reported recently. In this review, various kinds of peptide immobilization strategies on CPs are introduced. Moreover, the aims of peptide modification are discussed in three aspects: enhancing the specific selectivity, avoiding nonspecific adhesion, and mimicking the environment of extracellular matrix. We highlighted recent studies in the applications of peptide-integrated CPs in electrochemical sensors, antifouling surfaces, and conductive biointerfaces. These studies have shown great potentials from the integration of peptide and CPs as a versatile platform for advanced biological and clinical applications in the near future.
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Affiliation(s)
- Chi-Cha Wang
- Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Shu-Chen Wei
- Department of Internal Medicine, National Taiwan University Hospital and College of Medicine, No.1 Jen Ai Road, Section 1, Taipei 10051, Taiwan
| | - Shyh-Chyang Luo
- Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.,Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes (NHRI), Miaoli County, 35053 Taiwan
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Sevostianova VV, Antonova LV, Mironov AV, Yuzhalin AE, Silnikov VN, Glushkova TV, Godovikova TS, Krivkina EO, Bolbasov E, Akentyeva TN, Khanova MY, Matveeva VG, Velikanova EA, Tarasov RS, Barbarash LS. Biodegradable Patches for Arterial Reconstruction Modified with RGD Peptides: Results of an Experimental Study. ACS OMEGA 2020; 5:21700-21711. [PMID: 32905385 PMCID: PMC7469394 DOI: 10.1021/acsomega.0c02593] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 08/10/2020] [Indexed: 05/09/2023]
Abstract
Modification by Arg-Gly-Asp (RGD) peptides is a promising approach to improve the biocompatibility of biodegradable vascular patches for arteriotomy. In this study, we evaluated the performance of vascular patches electrospun using a blend of polycaprolactone (PCL) and polyhydroxybutyrate/valerate (PHBV) and additionally modified with RGDK, AhRGD, and c[RGDFK] peptides using 1,6-hexamethylenediamine or 4,7,10-trioxa-1,13-tridecanediamine (TTDDA) linkers. We examined mechanical properties and hemocompatibility of resulting patches before implanting them in rat abdominal aortas to assess their performance in vivo. Patches were explanted 1, 3, 6, and 12 months postoperation followed by histological and immunofluorescence analyses. Patches manufactured from the human internal mammary artery or commercially available KemPeriplas-Neo xenopericardial patches were used as a control. The tensile strength and F max of KemPeriplas-Neo patches were 4- and 16.7-times higher than those made of human internal mammary artery, respectively. Both RGD-modified and unmodified PHBV/PCL patches demonstrated properties similar to a human internal mammary artery patch. Regardless of RGD modification, experimental PHBV/PCL patches displayed fewer lysed red blood cells and resulted in milder platelet aggregation than KemPeriplas-Neo patches. Xenopericardial patches failed to form an endothelial layer in vivo and were prone to calcification. By contrast, TTDDA/RGDK-modified biodegradable patches demonstrated a resistance to calcification. Modification by TTDDA/RGDK and TTDDA/c[RGDFK] facilitated the formation of neovasculature upon the implantation in vivo.
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Affiliation(s)
- Viktoriia V. Sevostianova
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
- . Phone: +7-3842-643802
| | - Larisa V. Antonova
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
| | - Andrey V. Mironov
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
| | - Arseniy E. Yuzhalin
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
| | - Vladimir N. Silnikov
- Institute
of Chemical Biology and Fundamental Medicine of the Siberian Branch
of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Tatiana V. Glushkova
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
| | - Tatyana S. Godovikova
- Institute
of Chemical Biology and Fundamental Medicine of the Siberian Branch
of the Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Evgeniya O. Krivkina
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
| | - Evgeniy Bolbasov
- National
Research Tomsk Polytechnic University, Tomsk 634050, Russia
| | - Tatiana N. Akentyeva
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
| | - Mariam Yu. Khanova
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
| | - Vera G. Matveeva
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
| | - Elena A. Velikanova
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
| | - Roman S. Tarasov
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
| | - Leonid S. Barbarash
- Research
Institute for Complex Issues of Cardiovascular Diseases, Kemerovo 650002, Russia
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7
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A Review on Surface Modifications and Coatings on Implants to Prevent Biofilm. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2019. [DOI: 10.1007/s40883-019-00116-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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8
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Biocompatibility of Small-Diameter Vascular Grafts in Different Modes of RGD Modification. Polymers (Basel) 2019; 11:polym11010174. [PMID: 30960158 PMCID: PMC6401695 DOI: 10.3390/polym11010174] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 01/15/2019] [Accepted: 01/15/2019] [Indexed: 12/22/2022] Open
Abstract
Modification with Arg-Gly-Asp (RGD) peptides is a promising approach to improve biocompatibility of small-calibre vascular grafts but it is unknown how different RGD sequence composition impacts graft performance. Here we manufactured 1.5 mm poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/poly(ε-caprolactone) grafts modified by distinct linear or cyclic RGD peptides immobilized by short or long amine linker arms. Modified vascular prostheses were tested in vitro to assess their mechanical properties, hemocompatibility, thrombogenicity and endothelialisation. We also implanted these grafts into rat abdominal aortas with the following histological examination at 1 and 3 months to evaluate their primary patency, cellular composition and detect possible calcification. Our results demonstrated that all modes of RGD modification reduce ultimate tensile strength of the grafts. Modification of prostheses does not cause haemolysis upon the contact with modified grafts, yet all the RGD-treated grafts display a tendency to promote platelet aggregation in comparison with unmodified counterparts. In vivo findings identify that cyclic Arg-Gly-Asp-Phe-Lys peptide in combination with trioxa-1,13-tridecanediamine linker group substantially improve graft biocompatibility. To conclude, here we for the first time compared synthetic small-diameter vascular prostheses with different modes of RGD modification. We suggest our graft modification regimen as enhancing graft performance and thus recommend it for future use in tissue engineering.
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9
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Maltose conjugation to PCL: Advanced structural characterization and preliminary biological properties. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.01.051] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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10
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Remya KR, Chandran S, Mani S, John A, Ramesh P. Hybrid polycaprolactone/polyethylene oxide scaffolds with tunable fiber surface morphology, improved hydrophilicity and biodegradability for bone tissue engineering applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:1444-1462. [PMID: 29656699 DOI: 10.1080/09205063.2018.1465664] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
In the present study, we attempt to modify Polycaprolactone (PCL) by blending it with a water soluble polymer Polyethyleneoxide (PEO) having two different molecular weights (Mv ~1,00,000 and 6,00,000) using electrospinning technique. The effect of PEO molecular weight and blend ratio on fiber morphology, porosity, surface wettability, static and dynamic mechanical properties of PCL was investigated. In vitro degradation studies in phosphate buffer saline (PBS) at 37 °C demonstrated formation of pores on fiber surface especially in blend scaffolds with 50:50 ratios. In vitro studies using human osteoblast sarcoma (hOS) cell lines on blend scaffolds showed improved cellular response with good cell adhesion, viability and proliferation. The study revealed that incorporation of PEO on PCL scaffolds complemented the properties of PCL and facilitated fabrication of scaffolds with improved hydrophilicity, mechanical property and tunable degradation profile with better cell viability which makes it an ideal candidate for bone tissue engineering applications.
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Affiliation(s)
- K R Remya
- a Division of Polymeric Medical Devices, Department of Medical Devices Engineering, Biomedical Technology Wing , Sree Chitra Tirunal Institute for Medical Sciences and Technology , Thiruvananthapuram , India
| | - Sunitha Chandran
- b TEM Laboratory, Department of Biomaterial Science and Technology, Biomedical Technology Wing , Sree Chitra Tirunal Institute for Medical Sciences and Technology , Thiruvananthapuram , India
| | - Susan Mani
- b TEM Laboratory, Department of Biomaterial Science and Technology, Biomedical Technology Wing , Sree Chitra Tirunal Institute for Medical Sciences and Technology , Thiruvananthapuram , India
| | - Annie John
- b TEM Laboratory, Department of Biomaterial Science and Technology, Biomedical Technology Wing , Sree Chitra Tirunal Institute for Medical Sciences and Technology , Thiruvananthapuram , India
| | - P Ramesh
- a Division of Polymeric Medical Devices, Department of Medical Devices Engineering, Biomedical Technology Wing , Sree Chitra Tirunal Institute for Medical Sciences and Technology , Thiruvananthapuram , India
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11
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Jang LK, Kim S, Seo J, Young Lee J. Facile and controllable electrochemical fabrication of cell-adhesive polypyrrole electrodes using pyrrole-RGD peptides. Biofabrication 2017; 9:045007. [PMID: 29019465 DOI: 10.1088/1758-5090/aa92a2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Electrically conductive polymers, such as polypyrrole (PPy), have been widely used for the fabrication of various biosensors and tissue engineering scaffolds. For their biologically relevant applications, conductive biomaterials capable of intimate cellular interactions are highly desired. However, conventional methods to incorporate biomolecules into conductive polymers do not offer fine and easy control over the surface density of the biomolecules and/or their stability. We present a novel method to electrochemically immobilize cell-adhesive Arg-Gly-Asp (RGD) ligands on PPy electrode surfaces with a simple control over the peptide surface density by varying the electrodeposition time. Synthesized pyrrole-GGGRGDS conjugates were electrochemically incorporated onto the surfaces of PPy-coated electrodes. The electrochemical impedances of the RGD-grafted PPy electrodes were not significantly different from the unmodified PPy films. Time-of-flight secondary-ion mass spectroscopy confirmed the presence of the RGD motif on the surface of the modified electrodes. In vitro studies with human mesenchymal stem cells (hMSCs) showed higher adhesion and faster proliferation of hMSCs on the PPy with a higher RGD density. This facile electrochemical modification of electrode surfaces allowed for a good control over the peptide surface density and cellular interactions and will benefit the fabrication of cell-interactive scaffolds or bio-electrodes.
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Affiliation(s)
- Lindy K Jang
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
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12
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Antonova LV, Seifalian AM, Kutikhin AG, Sevostyanova VV, Matveeva VG, Velikanova EA, Mironov AV, Shabaev AR, Glushkova TV, Senokosova EA, Vasyukov GY, Krivkina EO, Burago AY, Kudryavtseva YA, Barbarash OL, Barbarash LS. Conjugation with RGD Peptides and Incorporation of Vascular Endothelial Growth Factor Are Equally Efficient for Biofunctionalization of Tissue-Engineered Vascular Grafts. Int J Mol Sci 2016; 17:E1920. [PMID: 27854352 PMCID: PMC5133917 DOI: 10.3390/ijms17111920] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 10/21/2016] [Accepted: 10/31/2016] [Indexed: 01/13/2023] Open
Abstract
The blend of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and poly(ε-caprolactone) (PCL) has recently been considered promising for vascular tissue engineering. However, it was shown that PHBV/PCL grafts require biofunctionalization to achieve high primary patency rate. Here we compared immobilization of arginine-glycine-aspartic acid (RGD)-containing peptides and the incorporation of vascular endothelial growth factor (VEGF) as two widely established biofunctionalization approaches. Electrospun PHBV/PCL small-diameter grafts with either RGD peptides or VEGF, as well as unmodified grafts were implanted into rat abdominal aortas for 1, 3, 6, and 12 months following histological and immunofluorescence assessment. We detected CD31⁺/CD34⁺/vWF⁺ cells 1 and 3 months postimplantation at the luminal surface of PHBV/PCL/RGD and PHBV/PCL/VEGF, but not in unmodified grafts, with the further observation of CD31⁺CD34-vWF⁺ phenotype. These cells were considered as endothelial and produced a collagen-positive layer resembling a basement membrane. Detection of CD31⁺/CD34⁺ cells at the early stages with subsequent loss of CD34 indicated cell adhesion from the bloodstream. Therefore, either conjugation with RGD peptides or the incorporation of VEGF promoted the formation of a functional endothelial cell layer. Furthermore, both modifications increased primary patency rate three-fold. In conclusion, both of these biofunctionalization approaches can be considered as equally efficient for the modification of tissue-engineered vascular grafts.
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Affiliation(s)
- Larisa V Antonova
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Alexander M Seifalian
- Centre for Nanotechnology and Regenerative Medicine, UCL Division of Surgery and Interventional Science, University College London, UCL Medical School Building, 21 University Street, London WC1E 6AU, UK.
- NanoRegMed Ltd., 20-22 Wenlock Road, London N1 7GU, UK.
| | - Anton G Kutikhin
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Victoria V Sevostyanova
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Vera G Matveeva
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Elena A Velikanova
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Andrey V Mironov
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Amin R Shabaev
- Kemerovo Cardiology Dispensary, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Tatiana V Glushkova
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Evgeniya A Senokosova
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Georgiy Yu Vasyukov
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Evgeniya O Krivkina
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Andrey Yu Burago
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Yuliya A Kudryavtseva
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Olga L Barbarash
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
| | - Leonid S Barbarash
- Research Institute for Complex Issues of Cardiovascular Diseases, Sosnovy Boulevard 6, Kemerovo 650002, Russia.
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13
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Gabriel M, Niederer K, Frey H. Wet Chemistry and Peptide Immobilization on Polytetrafluoroethylene for Improved Cell-adhesion. J Vis Exp 2016. [PMID: 27584937 DOI: 10.3791/54272] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Endowing materials surface with cell-adhesive properties is a common strategy in biomaterial research and tissue engineering. This is particularly interesting for already approved polymers that have a long standing use in medicine because these materials are well characterized and legal issues associated with the introduction of newly synthesized polymers may be avoided. Polytetrafluoroethylene (PTFE) is one of the most frequently employed materials for the manufacturing of vascular grafts but the polymer lacks cell adhesion promoting features. Endothelialization, i.e., complete coverage of the grafts inner surface with a confluent layer of endothelial cells is regarded key to optimal performance, mainly by reducing thrombogenicity of the artificial interface. This study investigates the growth of endothelial cells on peptide-modified PTFE and compares these results to those obtained on unmodified substrate. Coupling with the endothelial cell adhesive peptide Arg-Glu-Asp-Val (REDV) is performed via activation of the fluorin-containing polymer using the reagent sodium naphthalenide, followed by subsequent conjugation steps. Cell culture is accomplished using Human Umbilical Vein Endothelial Cells (HUVECs) and excellent cellular growth on peptide-immobilized material is demonstrated over a two-week period.
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Affiliation(s)
| | | | - Holger Frey
- Department of Organic Chemistry, Johannes-Gutenberg University
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14
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Novel heart valve prosthesis with self-endothelialization potential made of modified polyhedral oligomeric silsesquioxane-nanocomposite material. Biointerphases 2016; 11:029801. [DOI: 10.1116/1.4939036] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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15
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Antonova LV, Seifalian AM, Kutikhin AG, Sevostyanova VV, Krivkina EO, Mironov AV, Burago AY, Velikanova EA, Matveeva VG, Glushkova TV, Sergeeva EA, Vasyukov GY, Kudryavtseva YA, Barbarash OL, Barbarash LS. Bioabsorbable Bypass Grafts Biofunctionalised with RGD Have Enhanced Biophysical Properties and Endothelialisation Tested In vivo. Front Pharmacol 2016; 7:136. [PMID: 27252652 PMCID: PMC4879758 DOI: 10.3389/fphar.2016.00136] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Accepted: 05/10/2016] [Indexed: 01/01/2023] Open
Abstract
Small diameter arterial bypass grafts are considered as unmet clinical need since the current grafts have poor patency of 25% within 5 years. We have developed a 3D scaffold manufactured from natural and synthetic biodegradable polymers, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and poly(𝜀-caprolactone) (PCL), respectively. Further to improve the biophysical properties as well as endothelialisation, the grafts were covalently conjugated with arginine-glycine-aspartic acid (RGD) bioactive peptides. The biophysical properties as well as endothelialisation of PHBV/PCL and PCL 2 mm diameter bypass grafts were assessed with and without biofunctionalisation with RGD peptides in vitro and in vivo. Morphology of the grafts was assessed by scanning electron microscopy, whereas physico-mechanical properties were evaluated using a physiological circulating system equipped with a state of art ultrasound vascular wall tracking system. Endothelialisation of the grafts in vitro and in vivo were assessed using a cell viability assay and rat abdominal aorta replacement model, respectively. The biofunctionalisation with RGD bioactive peptides decreased mean fiber diameter and mean pore area in PHBV/PCL grafts; however, this was not the case for PCL grafts. Both PHBV/PCL and PCL grafts with RGD peptides had lower durability compared to those without; these durability values were similar to those of internal mammary artery. Modification of PHBV/PCL and PCL grafts with RGD peptides increased endothelial cell viability in vitro by a factor of eight and enhanced the formation of an endothelial cell monolayer in vivo 1 month postimplantation. In conclusion, PHBV/PCL small-caliber graft can be a suitable 3D scaffold for the development of a tissue engineering arterial bypass graft.
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Affiliation(s)
- Larisa V Antonova
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | - Alexander M Seifalian
- Centre for Nanotechnology and Regenerative Medicine, UCL Division of Surgery and Interventional Science, University College LondonLondon, UK; NanoRegMed LtdLondon, UK
| | - Anton G Kutikhin
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | | | - Evgeniya O Krivkina
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | - Andrey V Mironov
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | - Andrey Y Burago
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | - Elena A Velikanova
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | - Vera G Matveeva
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | - Tatiana V Glushkova
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | - Evgeniya A Sergeeva
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | - Georgiy Y Vasyukov
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | | | - Olga L Barbarash
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
| | - Leonid S Barbarash
- Research Institute for Complex Issues of Cardiovascular Diseases Kemerovo, Russia
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16
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Ansari M, Salahshour-Kordestani S, Habibi-Rezaei M, Movahedi AAM. Synthesis and Characterization of Acylated Polycaprolactone (PCL) Nanospheres and Investigation of Their Influence on Aggregation of Amyloid Proteins. J MACROMOL SCI B 2014. [DOI: 10.1080/00222348.2014.984578] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Thomas LV, Nair PD. (Citric acid-co-polycaprolactone triol) polyester: a biodegradable elastomer for soft tissue engineering. BIOMATTER 2014; 1:81-90. [PMID: 23507730 PMCID: PMC3548247 DOI: 10.4161/biom.1.1.17301] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Tissue engineering holds enormous challenges for materials science, wherein the ideal scaffold to be used is expected to be biocompatible, biodegradable and possess mechanical and physical properties that are suitable for target application. In this context, we have prepared degradable polyesters in different ratios by a simple polycondensation technique with citric acid and polycaprolactone triol. Differential scanning calorimetry indicated that the materials were amorphous based the absence of a crystalline melting peak and the presence of a glass transition temperature below 37°C. These polyesters were found to be hydrophilic and could be tailor-made into tubes and films. Porosity could also be introduced by addition of porogens. All the materials were non-cytotoxic in an in vitro cytotoxicity assay and may degrade via hydrolysis to non-toxic degradation products. These polyesters have potential implications in the field of soft tissue engineering on account of their similarity of properties.
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Affiliation(s)
- Lynda V Thomas
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India
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18
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Xu B, Yang S, Zhu J, Ma Y, Zhao G, Guo Y, Xu L. Novel chemical strategy for the synthesis of RGDCySS tetrapeptide. Chem Res Chin Univ 2014. [DOI: 10.1007/s40242-014-3228-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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19
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Regis S, Youssefian S, Jassal M, Phaneuf M, Rahbar N, Bhowmick S. Integrin α5β1-mediated attachment of NIH/3T3 fibroblasts to fibronectin adsorbed onto electrospun polymer scaffolds. POLYM ENG SCI 2013. [DOI: 10.1002/pen.23809] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Shawn Regis
- Biomedical Engineering and Biotechnology program; University of Massachusetts Dartmouth; 285 Old Westport Road North Dartmouth Massachusetts 02747
| | - Sina Youssefian
- Department of Mechanical Engineering; Worcester Polytechnic Institute; 100 Institute Road Worcester Massachusetts 01609
| | - Manisha Jassal
- Biomedical Engineering and Biotechnology program; University of Massachusetts Dartmouth; 285 Old Westport Road North Dartmouth Massachusetts 02747
| | - Matthew Phaneuf
- BioSurfaces; Inc. 200 Homer Avenue, Unit 1P Ashland Massachusetts 01721
| | - Nima Rahbar
- Department of Civil and Environmental Engineering; Worcester Polytechnic Institute; 100 Institute Road Worcester Massachusetts 01609
| | - Sankha Bhowmick
- Biomedical Engineering and Biotechnology program; University of Massachusetts Dartmouth; 285 Old Westport Road North Dartmouth Massachusetts 02747
- Department of Mechanical Engineering; University of Massachusetts Dartmouth; 285 Old Westport Road North Dartmouth Massachusetts 02747
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20
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Covalent grafting of the RGD-peptide onto polyetheretherketone surfaces via Schiff base formation. ScientificWorldJournal 2013; 2013:616535. [PMID: 24228010 PMCID: PMC3818978 DOI: 10.1155/2013/616535] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 09/18/2013] [Indexed: 11/17/2022] Open
Abstract
In recent years, the synthetic polymer polyetheretherketone (PEEK) has increasingly been used in a number of orthopedic implementations, due to its excellent mechanical properties, bioinertness, and chemical resistance. For in vivo applications, the surface of PEEK, which does not naturally support cell adhesion, has to be modified to improve tissue integration. In the present work we demonstrate a novel wet-chemical modification of PEEK to modify the surface, enabling the covalent grafting of the cell-adhesive RGD-peptide. Modification of the polymer surface was achieved via Schiff base formation using an aliphatic diamine and subsequent crosslinker-mediated immobilization of the peptide. In cell culture experiments with primary osteoblasts it was shown that the RGD-modified PEEK not only significantly promoted cellular adhesion but also strongly enhanced the proliferation of osteoblasts on the modified polymer surface.
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21
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Gloria A, Causa F, Russo T, Battista E, Della Moglie R, Zeppetelli S, De Santis R, Netti PA, Ambrosio L. Three-Dimensional Poly(ε-caprolactone) Bioactive Scaffolds with Controlled Structural and Surface Properties. Biomacromolecules 2012; 13:3510-21. [DOI: 10.1021/bm300818y] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Gloria
- Institute of Composite and Biomedical
Materials, National Research Council, P.le
Tecchio 80, 80125, Naples, Italy
| | - F. Causa
- Interdisciplinary Research Centre
on Biomaterials (CRIB), University of Naples “Federico II”,
and Center for Advanced Biomaterials for Healthcare (CABHC), Istituto Italiano di Tecnologia (IIT), P.le Tecchio
80, 80125, Naples, Italy
| | - T. Russo
- Institute of Composite and Biomedical
Materials, National Research Council, P.le
Tecchio 80, 80125, Naples, Italy
| | - E. Battista
- Interdisciplinary Research Centre
on Biomaterials (CRIB), University of Naples “Federico II”,
and Center for Advanced Biomaterials for Healthcare (CABHC), Istituto Italiano di Tecnologia (IIT), P.le Tecchio
80, 80125, Naples, Italy
| | - R. Della Moglie
- Interdisciplinary Research Centre
on Biomaterials (CRIB), University of Naples “Federico II”,
and Center for Advanced Biomaterials for Healthcare (CABHC), Istituto Italiano di Tecnologia (IIT), P.le Tecchio
80, 80125, Naples, Italy
| | - S. Zeppetelli
- Institute of Composite and Biomedical
Materials, National Research Council, P.le
Tecchio 80, 80125, Naples, Italy
| | - R. De Santis
- Institute of Composite and Biomedical
Materials, National Research Council, P.le
Tecchio 80, 80125, Naples, Italy
| | - P. A. Netti
- Interdisciplinary Research Centre
on Biomaterials (CRIB), University of Naples “Federico II”,
and Center for Advanced Biomaterials for Healthcare (CABHC), Istituto Italiano di Tecnologia (IIT), P.le Tecchio
80, 80125, Naples, Italy
| | - L. Ambrosio
- Institute of Composite and Biomedical
Materials, National Research Council, P.le
Tecchio 80, 80125, Naples, Italy
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22
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Korzhikov VA, Vlakh EG, Tennikova TB. Polymers in orthopedic surgery and tissue engineering: From engineering materials to smart biofunctionalization of a surface. POLYMER SCIENCE SERIES A 2012. [DOI: 10.1134/s0965545x12070036] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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23
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Kersemans K, Desmet T, Vanhove C, Dubruel P, De Vos F. Radiolabeled gelatin type B analogues can be used for non-invasive visualisation and quantification of protein coatings on 3D porous implants. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:1961-1969. [PMID: 22569737 DOI: 10.1007/s10856-012-4668-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 04/27/2012] [Indexed: 05/31/2023]
Abstract
This study covers the quantification of the covalent attachment of gelatin type B (GelB) and the subsequent adsorption of Fibronectin (Fn) on poly-ε-caprolactone (PCL) surfaces, functionalised with 2-aminoethyl methacrylate (AEMA) by means of post-plasma UV-irradiation grafting. As typical surface characterisation tools do not allow quantification of deposited amounts of GelB or Fn, radiolabeled analogues were used for direct measurement of the amount of immobilized material. Bolton-Hunter GelB (BHG) and Fn were radioiodinated with (131)I and (125)I respectively and S-Hynic GelB (SHG) was labeled with (99m)Tc. Immobilisation of (131)I-BHG or (99m)Tc-SHG on both PCL and PCL-AEMA scaffolds was performed in analogy with earlier work. SPECT images on scaffolds coated with (99m)Tc-SHG conjugates were acquired on a U-SPECT II camera. There was a clear difference in the amount of deposited (131)I-BHG between blanco and AEMA-grafted PCL on 2D samples. No significant differences in immobilization behaviour were observed between (99m)Tc-SHG and (131)I-BHG. Subsequent immobilisation of Fn was successful and depended on the amounts of deposited GelB. SPECT imaging on cylindrical 3D scaffolds confirmed these findings and showed that the amount of immobilized (99m)Tc-SHG was depth dependant. The architecture of the scaffolds strongly influences the distribution of GelB within these structures. Furthermore, there is a clear difference in the homogeneity of the protein coating when different GelB immobilization protocols were applied. This study shows that radiolabeled compounds are a rapid and accurate tool in the quantitative and qualitative evaluation of the biofunctionalisation of AEMA grafted PCL scaffolds.
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Affiliation(s)
- Ken Kersemans
- Laboratory for Radiopharmacy, Gent University, Ghent, Belgium.
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24
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Leong WS, Wu SC, Pal M, Tay CY, Yu H, Li H, Tan LP. Cyclic tensile loading regulates human mesenchymal stem cell differentiation into neuron-like phenotype. J Tissue Eng Regen Med 2012; 6 Suppl 3:s68-79. [PMID: 22777815 DOI: 10.1002/term.1548] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 03/14/2012] [Accepted: 05/14/2012] [Indexed: 01/12/2023]
Abstract
Mechanical loading has been utilized as an effective tool to direct mesenchymal stem cells (MSCs) commitment into cell lineages of mesodermal origin. However, the use of this tool to induce transdifferentiation of MSCs into the neural lineage has never been attempted. In this study, we examined the potential of uniaxial cyclic tensile loading in promoting neuronal differentiation of human MSCs (hMSCs) on modified biodegradable poly(ε-caprolactone) (PCL). The stem cell morphology, tissue-specific gene and protein expression, microfilament structure and, subsequently, Rho GTPase activity were analysed after cyclically stretching the cells at a range of amplitudes (0.5%, 2% or 3.5%) and frequencies (0.5, 1 or 1.5 Hz) for 8 h. hMSCs responded to these stimuli and displayed distinctly different microfilament organization. However, only those stretched at 0.5% strain amplitude and 0.5 Hz frequency showed promoted outgrowth of filopodia with significant upregulation of neurogenic genes expression. Positive staining of the neurogenic protein markers Nestin and Tuj1 suggested that the hMSCs had been committed to early neuronal progenitors. In addition, Rac1 but not RhoA was activated at this particular loading parameter. Furthermore, inhibition of Rac1 activity with NSC23766 disrupted the effect of cyclic loading. The results suggest that cyclic tensile loading at low amplitude and frequency is capable of triggering neuron-like differentiation through the regulation of Rho GTPases activity, even in the absence of neurogenic induction medium.
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Affiliation(s)
- Wen Shing Leong
- Division of Materials Technology, School of Materials Science and Engineering, Nanyang Technological University, Singapore; Republic Polytechnic, Singapore
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25
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Gabriel M, Strand D, Vahl CF. Cell adhesive and antifouling polyvinyl chloride surfaces via wet chemical modification. Artif Organs 2012; 36:839-44. [PMID: 22747750 DOI: 10.1111/j.1525-1594.2012.01462.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Polyvinyl chloride (PVC) is one of the most frequently used polymers for the manufacturing of medical devices. Limitations for its usage are based upon unfavorable surface properties of the polymer including its hydrophobicity and lack of functionalities in order to increase its versatility. To address this issue, wet chemical modification of PVC was performed through surface amination using the bifunctional compound ethylene diamine. The reaction was conducted in order to achieve maximum surface amination while leaving the bulk material unaffected. The initial activation step was characterized by means of various methods including contact angle measurements, colorimetric amine quantification, infrared spectroscopy, and gel permeation chromatography. Depth profiles were obtained by a confocal microscopic method using fluorescence labeling. Exclusive surface modification was thus confirmed. To demonstrate biological applications of the presented technique, two examples were chosen: The covalent immobilization of the cell adhesive Asp-Gly-Asp-Ser-peptide (RGD) onto PVC samples yielded a surface that strongly supported cellular adhesion and proliferation of fibroblasts. In contrast, the decoration of PVC with the hydrophilic polymer polyethylene glycol prevented cellular adhesion to a large extent. The impact of these modifications was demonstrated by cell culture experiments.
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Affiliation(s)
- Matthias Gabriel
- Department of Cardiothoracic and Vascular Surgery, Johannes Gutenberg-University School of Medicine, Mainz, Germany.
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26
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Immobilization of gelatin onto poly(glycidyl methacrylate)-grafted polycaprolactone substrates for improved cell-material interactions. Biointerphases 2012; 7:30. [PMID: 22589073 DOI: 10.1007/s13758-012-0030-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 04/05/2012] [Indexed: 10/28/2022] Open
Abstract
To enhance the cytocompatibility of polycaprolactone (PCL), cell-adhesive gelatin is covalently immobilized onto the PCL film surface via two surface-modified approaches: a conventional chemical immobilization process and a surface-initiated atom transfer radical polymerization (ATRP) process. Kinetics studies reveal that the polymer chain growth from the PCL film using the ATRP process is formed in a controlled manner, and that the amount of immobilized gelatin increases with an increasing concentration of epoxide groups on the grafted P(GMA) brushes. In vitro cell adhesion and proliferation studies demonstrate that cell affinity and growth are significantly improved by the immobilization of gelatin on PCL film surfaces, and that this improvement is positively correlated to the amount of covalently immobilized gelatin. With the versatility of the ATRP process and tunable grafting efficacy of gelatin, this study offers a suitable methodology for the functionalization of biodegradable polyesters scaffolds to improve cell-material interactions.
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27
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Endothelialization and patency of RGD-functionalized vascular grafts in a rabbit carotid artery model. Biomaterials 2012; 33:2880-91. [DOI: 10.1016/j.biomaterials.2011.12.047] [Citation(s) in RCA: 236] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Accepted: 12/26/2011] [Indexed: 01/22/2023]
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28
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Desmet T, Poleunis C, Delcorte A, Dubruel P. Double protein functionalized poly-ε-caprolactone surfaces: in depth ToF-SIMS and XPS characterization. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:293-305. [PMID: 22203514 DOI: 10.1007/s10856-011-4527-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Accepted: 12/09/2011] [Indexed: 05/31/2023]
Abstract
In biomaterial research, great attention has focussed on the immobilization of biomolecules with the aim to increase cell-adhesive properties of materials. Many different strategies can be applied. In previously published work, our group focussed on the treatment of poly-ε-caprolactone (PCL) films by an Ar-plasma, followed by the grafting of 2-aminoethyl methacrylate (AEMA) under UV-irradiation. The functional groups introduced, enabled the subsequent covalent immobilisation of gelatin. The obtained coating was finally applied for the physisorption of fibronectin. The successful PCL surface functionalization was preliminary confirmed using XPS, wettability studies, AFM and SEM. In the present article, we report on an in-depth characterization of the materials developed using ToF-SIMS and XPS analysis. The homogeneous AEMA grafting and the subsequent protein coating steps could be confirmed by both XPS and ToF-SIMS. Using ToF-SIMS, it was possible to demonstrate the presence of polymethacrylates on the surface. From peak deconvoluted XPS results (C- and N-peak), the presence of proteins could be confirmed. Using ToF-SIMS, different positive ions, correlating to specific amino-acids could be identified. Importantly, the gelatin and the fibronectin coatings could be qualitatively distinguished. Interestingly for biomedical applications, ethylene oxide sterilization did not affect the surface chemical composition. This research clearly demonstrates the complementarities of XPS and ToF-SIMS in biomedical surface modification research.
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Affiliation(s)
- T Desmet
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Ghent, Belgium
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29
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de Olyveira GM, Manzine Costa LM, Basmaji P, Xavier Filho L. Bacterial Nanocellulose for Medicine Regenerative. J Nanotechnol Eng Med 2012. [DOI: 10.1115/1.4004181] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Bacterial cellulose (BC) has established to be a remarkably versatile biomaterial and can be used in a wide variety of applied scientific endeavours, especially for medical devices. Nanocellulose, such as that produced by the bacteria Gluconacetobacter xylinus (bacterial cellulose, BC), is an emerging biomaterial with great potential in flexible radar absorbing materials, in scaffold for tissue regeneration, water treatment, and medical applications. Bacterial cellulose nanofibril bundles have excellent intrinsic properties due to their high crystallinity, which is higher than that generally recorded for macroscale natural fibers and is of the same order as the elastic modulus of glass fibers. Compared with cellulose from plants, BC also possesses higher water holding capacity, higher degree of polymerization (up to 8000), and a finer weblike network. In addition, BC is produced as a highly hydrated and relatively pure cellulose membrane, and therefore no chemical treatments are needed to remove lignin and hemicelluloses, as is the case for plant cellulose. Because of these characteristics, biomedical devices recently have gained a significant amount of attention because of an increased interest in tissue-engineered products for both wound care and the regeneration of damaged or diseased organs. Hydrophilic bacterial cellulose fibers of an average diameter of 50 nm are produced by the bacterium Acetobacter xylinum, using a fermentation process. The architecture of BC materials can be engineered over length scales ranging from nano to macro by controlling the biofabrication process. Moreover, the nanostructure and morphological similarities with collagen make BC attractive for cell immobilization and cell support. This review describes the fundamentals, purification, and morphological investigation of bacterial cellulose. Besides, microbial cellulose modification and how to increase the compatibility between cellulosic surfaces and a variety of plastic materials have been reported. Furthermore, provides deep knowledge of current and future applications of bacterial cellulose and their nanocomposites especially in the medical field.
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Affiliation(s)
- Gabriel Molina de Olyveira
- Centro de Ciências Naturais e Humanas CCNH-UFABC, Rua Santa Adélia, 166, Santo André-SP, Brazil, 09291-210
| | - Ligia Maria Manzine Costa
- Centro de Ciências Naturais e Humanas CCNH-UFABC, Rua Santa Adélia, 166, Santo André-SP, Brazil, 09291-210
| | - Pierre Basmaji
- Innovatec’s–Biotechnology Research and Development, Sao Carlos, SP, Brazil, 13566-610
| | - Lauro Xavier Filho
- Laboratorio de Produtos Naturais e Biotecnologia, IPT, UNIT, Aracaju-Sergipe, Brazil, 49.032-490
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30
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Yuan S, Xiong G, Wang X, Zhang S, Choong C. Surface modification of polycaprolactone substrates using collagen-conjugated poly(methacrylic acid) brushes for the regulation of cell proliferation and endothelialisation. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31213a] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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31
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Fu X, Sammons RL, Bertóti I, Jenkins MJ, Dong H. Active screen plasma surface modification of polycaprolactone to improve cell attachment. J Biomed Mater Res B Appl Biomater 2011; 100:314-20. [PMID: 22179939 DOI: 10.1002/jbm.b.31916] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Revised: 05/31/2011] [Accepted: 06/16/2011] [Indexed: 11/09/2022]
Abstract
To tailor polycaprolactone (PCL) surface properties for biomedical applications, film samples of PCL were surface modified by the active screen plasma nitriding (ASPN) technique. The chemical composition and structure were characterized by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The wettability of the surface modified polymers was investigated by contact angle and surface energy methods. Biocompatibility of the prepared PCL samples was evaluated in vitro using MC3T3-E1 osteoblast-like cells. The degradability was assessed by determining the self-degradation rate (catalyzed by lipase). The results show that ASPN surface modification can effectively improve osteoblast cell adhesion and spreading on the surface of PCL. The main change in chemical composition is the exchange of some carboxyl groups on the surface for hydroxyl groups. The active-screen plasma nitriding technique has been found to be an effective and practical method to effectively improve osteoblast cell adhesion and spreading on the PCL surface. Such changes have been attributed to the increase in wettablity and generation of new hydroxyl groups by plasma treatment. After active-screen plasma treatment, the PCL film is still degradable, but the enzymatic degradation rate is slower compared with untreated PCL film.
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Affiliation(s)
- Xin Fu
- School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, UK.
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Gandaglia A, Huerta-Cantillo R, Comisso M, Danesin R, Ghezzo F, Naso F, Gastaldello A, Schittullo E, Buratto E, Spina M, Gerosa G, Dettin M. Cardiomyocytes in vitro adhesion is actively influenced by biomimetic synthetic peptides for cardiac tissue engineering. Tissue Eng Part A 2011; 18:725-36. [PMID: 22011064 DOI: 10.1089/ten.tea.2011.0254] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Scaffolds for tissue engineering must be designed to direct desired events such as cell attachment, growth, and differentiation. The incorporation of extracellular matrix-derived peptides into biomaterials has been proposed to mimic biochemical signals. In this study, three synthetic fragments of fibronectin, vitronectin, and stromal-derived factor-1 were investigated for the first time as potential adhesive sequences for cardiomyocytes (CMs) compared to smooth muscle cells. CMs are responsive to all peptides to differing degrees, demonstrating the existence of diverse adhesion mechanisms. The pretreatment of nontissue culture well surfaces with the (Arginine-Glycine-Aspartic Acid) RGD sequence anticipated the appearance of CMs' contractility compared to the control (fibronectin-coated well) and doubled the length of cell viability. Future prospects are the inclusion of these sequences into biomaterial formulation with the improvement in cell adhesion that could play an important role in cell retention during dynamic cell seeding.
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Affiliation(s)
- Alessandro Gandaglia
- Department of Cardiac, Thoracic and Vascular Science, University of Padova, Padova, Italy.
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Gabriel M, Dahm M, Vahl CF. Wet-chemical approach for the cell-adhesive modification of polytetrafluoroethylene. Biomed Mater 2011; 6:035007. [DOI: 10.1088/1748-6041/6/3/035007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fink H, Ahrenstedt L, Bodin A, Brumer H, Gatenholm P, Krettek A, Risberg B. Bacterial cellulose modified with xyloglucan bearing the adhesion peptide RGD promotes endothelial cell adhesion and metabolism-a promising modification for vascular grafts. J Tissue Eng Regen Med 2010; 5:454-63. [DOI: 10.1002/term.334] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2009] [Accepted: 05/13/2010] [Indexed: 11/10/2022]
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Blit PH, Shen YH, Ernsting MJ, Woodhouse KA, Santerre JP. Bioactivation of porous polyurethane scaffolds using fluorinated RGD surface modifiers. J Biomed Mater Res A 2010; 94:1226-35. [PMID: 20694989 DOI: 10.1002/jbm.a.32804] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Biomaterial scaffolds for tissue engineering require appropriate cell adhesion, proliferation, and infiltration into their three-dimensional (3D) porous structures. Surface modification techniques have the potential to enhance cell infiltration into synthetic scaffolds while retaining bulk material properties intact. The objective of this work was to assess the potential of achieving a uniform surface modification in 3D porous constructs through the blending of surface-modifying additives known as bioactive fluorinated surface modifiers (BFSMs) with a base polyurethane material. By coupling RGD peptides to the fluorinated surface modifiers to form RGD-BFSMs, the BFSMs can act as a vehicle for the delivery of RGD moieties to the surface without direct covalent attachment to the polymer substrate. Fluorescent RGD-BFSMs were shown to migrate to the polymer-air interfaces within the porous scaffolds by two-photon confocal microscopy. A-10 rat aortic smooth muscle cells were cultured for 4 weeks on nonmodified and RGD-BFSM-modified porous scaffolds, and cell adhesion, proliferation, and viability were quantified at different depths. RGD-BFSM-modified scaffolds showed significantly greater cell numbers within deeper regions of the scaffolds, and this difference became more pronounced over time. This study demonstrates an effective approach to promote cell adhesion and infiltration within thick (approximately 0.5 cm) porous synthetic scaffolds by providing a uniform distribution of adhesive peptide throughout the scaffolds without the use of covalent surface reaction chemistry.
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Affiliation(s)
- Patrick H Blit
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
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Theiler S, Mela P, Diamantouros SE, Jockenhoevel S, Keul H, Möller M. Fabrication of highly porous scaffolds for tissue engineering based on star-shaped functional poly(ε-caprolactone). Biotechnol Bioeng 2010; 108:694-703. [DOI: 10.1002/bit.22979] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2010] [Revised: 10/02/2010] [Accepted: 10/05/2010] [Indexed: 01/26/2023]
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Lao HK, Renard E, Fagui AE, Langlois V, Vallée-Rehel K, Linossier I. Functionalization of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) films via surface-initiated atom transfer radical polymerization: Comparison with the conventional free-radical grafting procedure. J Appl Polym Sci 2010. [DOI: 10.1002/app.32967] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Desmet T, Billiet T, Berneel E, Cornelissen R, Schaubroeck D, Schacht E, Dubruel P. Post-Plasma Grafting of AEMA as a Versatile Tool to Biofunctionalise Polyesters for Tissue Engineering. Macromol Biosci 2010; 10:1484-94. [DOI: 10.1002/mabi.201000147] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Revised: 05/29/2010] [Indexed: 11/06/2022]
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Causa F, Battista E, Della Moglie R, Guarnieri D, Iannone M, Netti PA. Surface investigation on biomimetic materials to control cell adhesion: the case of RGD conjugation on PCL. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:9875-9884. [PMID: 20349926 DOI: 10.1021/la100207q] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The cell recognition of bioactive ligands immobilized on polymeric surfaces is strongly dependent on ligand presentation at the cell/material interface. While small peptide sequences such as Arg-Gly-Asp (RGD) are being widely used to obtain biomimetic interfaces, surface characteristics after immobilization as well as presentation of such ligands to cell receptors deserve more detailed investigation. Here, we immobilized an RGD-based sequence on poly(epsilon-caprolactone) (PCL), a largely widespread polymeric material used in biomedical applications, after polymer aminolysis. The surface characteristics along with the efficacy of the functionalization was monitored by surface analysis (FTIR-ATR, contact angle measurements, surface free energy determination) and spectrophotometric assays specially adapted for the analytical quantification of functional groups and/or peptides at the interface. Particular attention was paid to the evaluation of a number, morphology, and penetration depth of immobilized functional groups and/or peptides engrafted on polymeric substrates. In particular, a typical morphology in peptide distribution was evidenced on the surface raised from polymer crystallites, while a significant penetration depth of the engrafted molecules was revealed. NIH3T3 fibroblast adhesion studies verified the correct presentation of the ligand with enhanced cell attachment after peptide conjugation. Such work proposes a morphological and analytical approach in surface characterization to study the surface treatment and the distribution of ligands immobilized on polymeric substrates.
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Affiliation(s)
- Filippo Causa
- Interdisciplinary Research Centre on Biomaterials (CRIB) University Federico II, Piazzale Tecchio 80, 80125, Naples, Italy.
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Kim SJ, Kim MR, Oh JS, Han I, Shin SW. Effects of polycaprolactone-tricalcium phosphate, recombinant human bone morphogenetic protein-2 and dog mesenchymal stem cells on bone formation: pilot study in dogs. Yonsei Med J 2009; 50:825-31. [PMID: 20046425 PMCID: PMC2796411 DOI: 10.3349/ymj.2009.50.6.825] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2008] [Revised: 01/09/2009] [Accepted: 01/09/2009] [Indexed: 01/13/2023] Open
Abstract
PURPOSE The aim of this study was to evaluate the survival, proliferation, and bone formation of dog mesenchymal stem cells (dMSCs) in the graft material by using Polycaprolactone-tricalcium phosphate (PCL-TCP), auto-fibrin glue (AFG), recombinant human bone morphogenetic protein-2 (rhBMP-2), and dMSCs after a transplantation to the scapula of adult beagle dogs. MATERIALS AND METHODS The subjects were two beagle dogs. Total dose of rhBMP-2 on each block was 10 microg with 50 microg/mg concentration. The cortical bone of the scapula of the dog was removed which was the same size of PCL-TCP block (Osteopore International Pte, Singapore; 5.0x5.0x8.0 mm in size), and the following graft material then was fixed with orthodontic mini-implant, Dual-top (Titanium alloy, Jeil Co. Seoul, Korea). Four experimental groups were prepared for this study, Group 1: PCL-TCP + aFG; Group 2: PCL-TCP + aFG + dMSCs; Group 3: PCL-TCP + aFG + dMSCs + rhBMP-2; Group 4: PCL-TCP + aFG + dMSCs + rhBMP-2 + PCL membrane. The survival or proliferation of dMSCs cells was identified with an extracted tissue through a fluorescence microscope, H-E staining and Von-Kossa staining in two weeks and four weeks after the transplantation. RESULTS The survival and proliferation of dMSCs were identified through a fluorescence microscope from both Group 1 and Group 2 in two weeks and four weeks after the transplantation. Histological observation also found that the injected cells were proliferating well in the G2, G3, and G4 scaffolds. CONCLUSION This study concluded that bone ingrowth occurred in PCL-TCP scaffold which was transplanted with rhBMP-2, and MSCs did not affect bone growth. More sufficient healing time would be needed to recognize effects of dMSCs on bone formation.
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Affiliation(s)
- Sun-Jong Kim
- Department of Oral and Maxillofacial Surgery, Ewha Womans University School of Medicine, Seoul, Korea
| | - Myung-Rae Kim
- Department of Oral and Maxillofacial Surgery, Ewha Womans University School of Medicine, Seoul, Korea
| | - Jin-Sub Oh
- Department of Advanced Prosthodontics, Institute for Clinical Dental Research, Korea University College of Medicine, Seoul, Korea
| | - Inho Han
- Department of Advanced Prosthodontics, Institute for Clinical Dental Research, Korea University College of Medicine, Seoul, Korea
| | - Sang-Wan Shin
- Department of Advanced Prosthodontics, Institute for Clinical Dental Research, Korea University College of Medicine, Seoul, Korea
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Fischer SE, Mi L, Mao HQ, Harden JL. Biofunctional coatings via targeted covalent cross-linking of associating triblock proteins. Biomacromolecules 2009; 10:2408-17. [PMID: 19655714 DOI: 10.1021/bm900202z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A method for creating tailorable bioactive surface coatings by targeted cross-linking of network-forming CRC protein polymers is presented. The proteins are triblock constructs composed of two self-associating leucine zipper end domains (C) separated by a soluble, disordered central block (R) containing a cell or molecular binding sequence. The end domains preferentially form trimeric bundles, leading to the formation of a regular, reversible hydrogel network in a wide range of solution conditions. These hydrogel-forming proteins are useful for creating bioactive surface coatings because they self-assemble into networks, physically adsorb to a variety of substrate materials, and can be tailored to display numerous extracellular matrix (ECM)-derived peptides that interact with cells and biological macromolecules. Moreover, due to the close proximity of complementary Glu and Lys residues in the trimeric C bundles, these protein coatings can be stabilized in a targeted manner by covalent cross-linking with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC). Here, we demonstrate that such EDC-cross-linked protein coatings are stable in cell culture media and maintain a significant level of biofunctionality when various ECM-derived peptides are embedded in the central soluble block of the proteins. First, we show that EDC cross-linking enables bioinert CRC protein coatings (those without embedded cell binding domains) to resist the adhesion of human foreskin fibroblasts in normal serum medium, but does not impair the ability of cross-linked coatings of CRC-RGDS (proteins with an embedded RGDS integrin binding domain) to promote cellular attachment, focal adhesion formation, and proliferation of these cells. Next, we show that the ability of cross-linked coatings of several new CRC-based proteins containing embedded heparin-binding sequences to bind biotinylated heparin is not significantly impacted over a range of EDC concentrations. The ability to target specific functional groups for covalent cross-linking is made possible by the specificity of protein-protein interactions and represents an important advantage of protein-based materials.
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Affiliation(s)
- Stephen E Fischer
- Department of Materials Science and Engineering, Johns Hopkins University, Maryland Hall, 3400 North Charles Street, Baltimore, Maryland 21218, USA
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Liu Y, Wang W, Wang J, Wang Y, Yuan Z, Tang S, Liu M, Tang H. Blood compatibility evaluation of poly(D,L-lactide-co-beta-malic acid) modified with the GRGDS sequence. Colloids Surf B Biointerfaces 2009; 75:370-6. [PMID: 19811897 DOI: 10.1016/j.colsurfb.2009.09.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Revised: 08/16/2009] [Accepted: 09/13/2009] [Indexed: 10/20/2022]
Abstract
Endothelialization is an ideal approach to improve the blood compatibility of synthetic polymers. However, cell detachment is inevitable under shear flow conditions. Therefore, the issue of blood compatibility needs to be addressed for both the bare and the endothelialized polymer. RGD-containing polymer P-GS5 was synthesized by modification of poly(D,L-lactide-co-beta-malic acid) (PLMA) with the peptide GRGDS. The compositions, molecular weights and hydrophilicities of poly(D,L-lactide) (PDLLA), PLMA, and P-GS5 were characterized by nuclear magnetic resonance (NMR), X-ray photoelectron spectroscopy (XPS), gel-permeation chromatography (GPC) and water contact angle measurements, respectively. The blood compatibilities of the bare and the endothelialized polymers were evaluated by clotting time and platelet adhesion tests. The results showed that the coagulation pathways were not influenced before and after cell culture; the bare P-GS5 attracted less platelet adhesion and induced lower pseudopodia extension compared with PDLLA and PLMA, and the platelet adhesion on P-GS5 was almost completely eliminated after cell seeding. The results suggest that P-GS5 could be a potentially useful material in vascular tissue engineering.
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Affiliation(s)
- Yuan Liu
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
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Desmet T, Morent R, De Geyter N, Leys C, Schacht E, Dubruel P. Nonthermal Plasma Technology as a Versatile Strategy for Polymeric Biomaterials Surface Modification: A Review. Biomacromolecules 2009; 10:2351-78. [DOI: 10.1021/bm900186s] [Citation(s) in RCA: 509] [Impact Index Per Article: 33.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Tim Desmet
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281 S4 Bis, Ghent, 9000, Belgium, and Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering, Ghent Univeristy, Jozef Plateaustraat 22, 9000 Ghent, Belgium
| | - Rino Morent
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281 S4 Bis, Ghent, 9000, Belgium, and Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering, Ghent Univeristy, Jozef Plateaustraat 22, 9000 Ghent, Belgium
| | - Nathalie De Geyter
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281 S4 Bis, Ghent, 9000, Belgium, and Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering, Ghent Univeristy, Jozef Plateaustraat 22, 9000 Ghent, Belgium
| | - Christophe Leys
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281 S4 Bis, Ghent, 9000, Belgium, and Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering, Ghent Univeristy, Jozef Plateaustraat 22, 9000 Ghent, Belgium
| | - Etienne Schacht
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281 S4 Bis, Ghent, 9000, Belgium, and Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering, Ghent Univeristy, Jozef Plateaustraat 22, 9000 Ghent, Belgium
| | - Peter Dubruel
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281 S4 Bis, Ghent, 9000, Belgium, and Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering, Ghent Univeristy, Jozef Plateaustraat 22, 9000 Ghent, Belgium
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Jabbari E, He X, Valarmathi MT, Sarvestani AS, Xu W. Material properties and bone marrow stromal cells response to in situ crosslinkable RGD-functionlized lactide-co-glycolide scaffolds. J Biomed Mater Res A 2009; 89:124-37. [PMID: 18431754 DOI: 10.1002/jbm.a.31936] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In situ crosslinkable biomaterials with degradation profiles that can be tailored to a particular application are indispensable for treating irregularly shaped defects and for fabrication of shape-selective scaffolds. The objective of this work was to synthesize ultra low molecular weight functionalized PLA and PLGA macromers that can be grafted with bioactive peptides and crosslinked in situ to fabricate biodegradable functional scaffolds. In situ crosslinkable lactide-co-glycolide macromer (cMLGA; "c" for crosslinkable, "M" for macromer, and "LGA" for lactide-co-glycolide) was synthesized by anionic polymerization of lactide and glycolide monomers followed by condensation polymerization with fumaryl chloride. The cMLA (100% L-lactide) and cMLGA macromers formed porous crosslinked scaffolds with NVP as the crosslinker. The mass loss of the crosslinked cMLA and cMLGA was linear with incubation time in vitro (zero-order degradation) and the degradation rate depended on the ratio of lactide to glycolide. cMLGA scaffold with 1:1 lactide to glycolide ratio completely degraded after 4 weeks while the cMLA lost less than 40% of its initial mass after 35 weeks. When cMLA scaffold was functionalized with acrylated integrin-binding Ac-GRGD amino acid sequence, bone marrow stromal (BMS) cells attached and spread on the cMLA scaffold and exhibited focal-point cell adhesion. The mRNA expression levels of collagen-1alpha, osteonectin, and osteopontin for BMS cells seeded in the scaffolds with 1 and 5% Ac-GRGD were upregulated compared with those without Ac-GRGD. cMLGA is attractive as in situ crosslinkable macromer for fabrication of functional scaffolds with degradation characteristics that can be tailored to a particular application.
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Affiliation(s)
- Esmaiel Jabbari
- Biomimetic Materials and Tissue Engineering Laboratories, Department of Chemical Engineering, University of South Carolina, Columbia, South Carolina, USA.
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Kou R, Sartoretto J, Michel T. Regulation of Rac1 by simvastatin in endothelial cells: differential roles of AMP-activated protein kinase and calmodulin-dependent kinase kinase-beta. J Biol Chem 2009; 284:14734-43. [PMID: 19332549 DOI: 10.1074/jbc.m808664200] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
These studies explore the connections between simvastatin, Rac1, and AMP-activated protein kinase (AMPK) pathways in cultured vascular endothelial cells and in arterial preparations isolated from statin-treated mice. In addition to their prominent effects on lipoprotein metabolism, statins can regulate the small GTPase Rac1, and may also affect the phosphorylation of the ubiquitous AMPK. We explored pathways of statin-modulated Rac1 and AMPK activation both in arterial preparations from statin-treated mice as well as in cultured endothelial cells. We treated adult mice with simvastatin daily for 2 weeks and then harvested and analyzed arterial preparations. Simvastatin treatment of mice led to a significant increase in AMPK and LKB1 phosphorylation and to a decrease in protein kinase A activity relative to control animals, associated with a marked increase in Rac1 activation. Exposure of bovine aortic endothelial cells to simvastatin for 24 h strikingly increased GTP-bound Rac1 and led to increased phosphorylation of AMPK as well as the AMPK kinase LKB1. These responses to simvastatin were blocked by mevalonate or geranylgeranyl pyrophosphate but not by farnesyl pyrophosphate. Small interfering RNA (siRNA)-mediated knockdown of AMPK abrogated simvastatin-induced Rac1 activation and LKB1 phosphorylation. Importantly, siRNA-mediated knockdown of the key AMPK kinase, calcium/calmodulin-dependent protein kinase kinase beta, completely blocked simvastatin-induced endothelial cell migration and also abrogated statin-promoted phosphorylation of AMPK and LKB1, as did pharmacological inhibition with the specific calcium/calmodulin-dependent protein kinase beta inhibitor STO-609. Moreover, siRNA-mediated knockdown of Rac1 completely blocked simvastatin-induced LKB1 phosphorylation, but without affecting simvastatin-induced AMPK phosphorylation. These findings establish a key role for simvastatin in activation of a novel Rac1-dependent signaling pathway in the vascular wall.
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Affiliation(s)
- Ruqin Kou
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
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Pourcelle V, Freichels H, Stoffelbach F, Auzély-Velty R, Jérôme C, Marchand-Brynaert J. Light Induced Functionalization of PCL-PEG Block Copolymers for the Covalent Immobilization of Biomolecules. Biomacromolecules 2009; 10:966-74. [DOI: 10.1021/bm900027r] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vincent Pourcelle
- Université catholique de Louvain, Unité de Chimie Organique et Médicinale (CHOM), Bâtiment Lavoisier, place Louis Pasteur 1, B-1348 Louvain-la-Neuve, Belgium, Center for Education and Research on Macromolecules (CERM), Université de Liège, Sart-Tilman B6, B-4000 Liège, Belgium, and Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), BP53, 38041 Grenoble cedex 9, France
| | - Hélène Freichels
- Université catholique de Louvain, Unité de Chimie Organique et Médicinale (CHOM), Bâtiment Lavoisier, place Louis Pasteur 1, B-1348 Louvain-la-Neuve, Belgium, Center for Education and Research on Macromolecules (CERM), Université de Liège, Sart-Tilman B6, B-4000 Liège, Belgium, and Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), BP53, 38041 Grenoble cedex 9, France
| | - François Stoffelbach
- Université catholique de Louvain, Unité de Chimie Organique et Médicinale (CHOM), Bâtiment Lavoisier, place Louis Pasteur 1, B-1348 Louvain-la-Neuve, Belgium, Center for Education and Research on Macromolecules (CERM), Université de Liège, Sart-Tilman B6, B-4000 Liège, Belgium, and Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), BP53, 38041 Grenoble cedex 9, France
| | - Rachel Auzély-Velty
- Université catholique de Louvain, Unité de Chimie Organique et Médicinale (CHOM), Bâtiment Lavoisier, place Louis Pasteur 1, B-1348 Louvain-la-Neuve, Belgium, Center for Education and Research on Macromolecules (CERM), Université de Liège, Sart-Tilman B6, B-4000 Liège, Belgium, and Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), BP53, 38041 Grenoble cedex 9, France
| | - Christine Jérôme
- Université catholique de Louvain, Unité de Chimie Organique et Médicinale (CHOM), Bâtiment Lavoisier, place Louis Pasteur 1, B-1348 Louvain-la-Neuve, Belgium, Center for Education and Research on Macromolecules (CERM), Université de Liège, Sart-Tilman B6, B-4000 Liège, Belgium, and Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), BP53, 38041 Grenoble cedex 9, France
| | - Jacqueline Marchand-Brynaert
- Université catholique de Louvain, Unité de Chimie Organique et Médicinale (CHOM), Bâtiment Lavoisier, place Louis Pasteur 1, B-1348 Louvain-la-Neuve, Belgium, Center for Education and Research on Macromolecules (CERM), Université de Liège, Sart-Tilman B6, B-4000 Liège, Belgium, and Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), BP53, 38041 Grenoble cedex 9, France
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Jung HJ, Park K, Kim JJ, Lee JH, Han KO, Han DK. Effect of RGD-Immobilized Dual-Pore Poly(l-Lactic Acid) Scaffolds on Chondrocyte Proliferation and Extracellular Matrix Production. Artif Organs 2008; 32:981-9. [DOI: 10.1111/j.1525-1594.2008.00660.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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48
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Prabhakaran MP, Venugopal JR, Chyan TT, Hai LB, Chan CK, Lim AY, Ramakrishna S. Electrospun Biocomposite Nanofibrous Scaffolds for Neural Tissue Engineering. Tissue Eng Part A 2008; 14:1787-97. [DOI: 10.1089/ten.tea.2007.0393] [Citation(s) in RCA: 230] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | | | - Tan Ter Chyan
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
| | - Lim Beng Hai
- Department of Orthopedic Surgery, National University Hospital, Singapore
| | - Casey K. Chan
- Division of Bioengineering, National University of Singapore, Singapore
| | - Aymeric Yutang Lim
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
| | - Seeram Ramakrishna
- Division of Bioengineering, National University of Singapore, Singapore
- Nanoscience and Nanotechnology Initiative, National University of Singapore, Singapore
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Kader KN, Yoder CM. Endothelial cell death on biomaterials: Theoretical and practical aspects of investigation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2008. [DOI: 10.1016/j.msec.2007.04.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Fischer SE, Liu X, Mao HQ, Harden JL. Controlling cell adhesion to surfaces via associating bioactive triblock proteins. Biomaterials 2007; 28:3325-37. [PMID: 17459470 DOI: 10.1016/j.biomaterials.2007.03.026] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2006] [Accepted: 03/27/2007] [Indexed: 11/30/2022]
Abstract
A surface functionalization strategy that produces substrates with well-controlled ligand density is critical to investigating the role of cell-substrate interactions in regulating cell adhesion, viability, migration, proliferation and differentiation. Towards this end, we have designed and synthesized a triblock protein, CRC, comprising a polyelectrolyte domain flanked by two amphiphilic leucine zipper domains. The amphiphilic end domains of CRC adsorb onto surfaces and preferentially associate into trimeric aggregates, forming a hydrogel coating layer. Under serum-free conditions, the CRC coating was found to render both 2D substrates and 3D scaffolds non-adhesive to cells. A RGDS sequence was inserted in the middle domain of CRC (generating the protein CRC-RGDS) and found to introduce cell-binding activity. Incorporation of the RGDS sequence did not significantly impact the surface activity of CRC, allowing us to titrate the RGDS surface density simply by adjusting the relative ratios of the two proteins. Ligand density dependent cell-substrate interactions were demonstrated in human foreskin fibroblasts, human umbilical vein endothelial cells, and rat neural stem cells. The versatility to functionalize a range of different substrate surfaces, combined with the ease of controlling surface ligand density, makes these triblock proteins an attractive tool for developing cell-specific surface coatings with tailored biofunctional attributes.
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Affiliation(s)
- Stephen E Fischer
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA
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