1
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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 ฮฑ9ฮฒ1 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, Charitรฉ-Universitรคtsmedizin Berlin, Corporate Member of Freie Universitรคt Berlin, Humboldt-Universitรคt 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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2
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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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3
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Wang C, Cao G, Zhao T, Wang X, Niu X, Fan Y, Li X. Terminal Group Modification of Carbon Nanotubes Determines Covalently Bound Osteogenic Peptide Performance. ACS Biomater Sci Eng 2020; 6:865-878. [PMID: 33464866 DOI: 10.1021/acsbiomaterials.9b01501] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Osteogenic peptides are often introduced to improve biological activities and the osteogenic ability of artificial bone materials as an effective approach. Covalent bindings between the peptide and the host material can increase the molecular interactions and make the functionalized surface more stable. However, covalent bindings through different functional groups can bring different effects on the overall bioactivities. In this study, carboxyl and amino groups were respectively introduced onto carbon nanotubes, a nanoreinforcement for synthetic scaffold materials, which were subsequently covalently attached to the RGD/BMP-2 osteogenic peptide. MC3T3-E1 cells were cultured on scaffolds containing peptide-modified carbon nanotubes. The results showed that the peptide through the amino group binding could promote cell functions more effectively than those through carboxyl groups. The mechanism may be that the amino group could bring more positive charges to carbon nanotube surfaces, which further led to differences in the peptide conformation, protein adsorption, and targeting osteogenic effects. Our results provided an effective way of improving the bioactivities of artificial bone materials by chemically binding osteogenic peptides.
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Affiliation(s)
- Cunyang Wang
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China
| | - Guangxiu Cao
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China
| | - Tianxiao Zhao
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China
| | - Xiumei Wang
- State Key Laboratory of New Ceramic and Fine Processing, Tsinghua University, Beijing 100084, China
| | - Xufeng Niu
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China
| | - Xiaoming Li
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China
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4
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Taylor MJ, Graham DJ, Gamble LJ. Time-of-flight secondary ion mass spectrometry three-dimensional imaging of surface modifications in poly(caprolactone) scaffold pores. J Biomed Mater Res A 2019; 107:2195-2204. [PMID: 31116499 PMCID: PMC6690353 DOI: 10.1002/jbm.a.36729] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 05/14/2019] [Accepted: 05/20/2019] [Indexed: 01/24/2023]
Abstract
Scaffolds composed of synthetic polymers such as poly(caprolactone) (PCL) are widely used for the support and repair of tissues in biomedicine. Pores are common features in scaffolds as they facilitate cell penetration. Various surface modifications can be performed to promote key biological responses to these scaffolds. However, verifying the chemistry of these materials post surface modification is problematic due to the combination of three-dimensional (3D) topography and surface sensitivity. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) is commonly used to correlate surface chemistry with cell response. In this study, 3D imaging mass spectrometry analysis of surface modified synthetic polymer scaffolds is demonstrated using PCL porous scaffold, a pore filling polymer sample preparation, and 3D imaging ToF-SIMS. We apply a simple sample preparation procedure, filling the scaffold pores with a poly(vinyl alcohol)/glycerol mixture to remove topographic influence on image quality. This filling method allows the scaffold (PCL) and filler secondary ions to be reconstructed into a 3D chemical image of the pore. Furthermore, we show that surface modifications in the pores of synthetic polymer scaffolds can be mapped in 3D. Imaging of "dry" and "wet" surface modifications is demonstrated as well as a comparison of surface modifications with relatively strong ToF-SIMS peaks (fluorocarbon films [FC]) and to more biologically relevant surface modification of a protein (bovine serum albumin [BSA]). We demonstrate that surface modifications can be imaged in 3D showing that characteristic secondary ions associated with FC and BSA are associated with C3 F8 plasma treatment and BSA, respectively within the pore.
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Affiliation(s)
- Michael J Taylor
- NESAC/BIO, Department of Bioengineering, University of Washington, Seattle, Washington
| | - Daniel J Graham
- NESAC/BIO, Department of Bioengineering, University of Washington, Seattle, Washington
| | - Lara J Gamble
- NESAC/BIO, Department of Bioengineering, University of Washington, Seattle, Washington
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5
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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(ฮต-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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6
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Oderinde O, Liu S, Li K, Kang M, Imtiaz H, Yao F, Fu G. Multifaceted polymeric materials in three-dimensional processing (3DP) technologies: Current progress and prospects. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4281] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Olayinka Oderinde
- School of Chemistry and Chemical Engineering Southeast University; Jiangning District Nanjing 211189 China
| | - Shunli Liu
- School of Chemistry and Chemical Engineering Southeast University; Jiangning District Nanjing 211189 China
| | - Kewen Li
- School of Chemistry and Chemical Engineering Southeast University; Jiangning District Nanjing 211189 China
| | - Mengmeng Kang
- School of Chemistry and Chemical Engineering Southeast University; Jiangning District Nanjing 211189 China
| | - Hussain Imtiaz
- School of Chemistry and Chemical Engineering Southeast University; Jiangning District Nanjing 211189 China
| | - Fang Yao
- School of Chemistry and Chemical Engineering Southeast University; Jiangning District Nanjing 211189 China
| | - Guodong Fu
- School of Chemistry and Chemical Engineering Southeast University; Jiangning District Nanjing 211189 China
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7
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The covalently immobilized antimicrobial peptide LL37 acts as a VEGF mimic and stimulates endothelial cell proliferation. Biochem Biophys Res Commun 2018; 496:887-890. [DOI: 10.1016/j.bbrc.2018.01.130] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 01/20/2018] [Indexed: 12/27/2022]
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8
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Liu L, Shi G, Cui Y, Li H, Li Z, Zeng Q, Guo Y. Individual construction of freeform-fabricated polycaprolactone scaffolds for osteogenesis. ACTA ACUST UNITED AC 2017; 62:467-479. [DOI: 10.1515/bmt-2016-0005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 08/19/2016] [Indexed: 11/15/2022]
Abstract
AbstractThe construction of engineered bone mostly focuses on simulating the extracellular matrix (ECM) for proper biological activity. However, the complexity of architecture and the variability of the mechanical properties of natural bones are related to individual differences in age, nutritional state, mechanical loading and disease status. Defect substitutions should be normed with the host natural bone, balancing architectural and mechanical adaption, as well as biological activity. Using a freeform fabrication (FFF) method, we prepared polycaprolactone (PCL) scaffolds with different architectures. With simulation of structural and mechanical parameters of rabbit femur cancellous bone, individual defect substitution with the characteristics of the rabbit femur was obtained with high porosity and connectivity. Biological adaption
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9
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Zhu L, Wang K, Ma T, Huang L, Xia B, Zhu S, Yang Y, Liu Z, Quan X, Luo K, Kong D, Huang J, Luo Z. Noncovalent Bonding of RGD and YIGSR to an Electrospun Poly(ฮต-Caprolactone) Conduit through Peptide Self-Assembly to Synergistically Promote Sciatic Nerve Regeneration in Rats. Adv Healthc Mater 2017; 6. [PMID: 28140528 DOI: 10.1002/adhm.201600860] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 11/19/2016] [Indexed: 12/18/2022]
Abstract
The nerve conduit with biofunctionalities can regulate neurite outgrowth, as well as the migration, proliferation, and myelination activity of Schwann cells. In the present study, polycaprolactone (PCL) conduits are coated with Naphthalene-phenylalanine-phenylalanine-glycine-arginine-glycine-aspartic (Nap-FFGRGD) and Naphthalene-phenylalanine-phenylalanine-glycine-cysteine-aspartic-proline-glycine-tyrosine-isoleucine-glycine-serine-arginine (Nap-FFGCDPGYIGSR) by self-assembly. In vitro studies demonstrate that arginine-glycine-aspartic (RGD) and tyrosine-isoleucine-glycine-serine-arginine (YIGSR) are capable of synergistically enhancing the ability of PCL to support the adhesion and proliferation of Schwann cells, as well as increasing neurite outgrowth from dorsal root ganglions explants. This synergistic effect may occur via the activation of both the phosphoinositide 3-kinase/protein kinase B and mitogen-activated protein kinase/extracellular signal-regulated protein kinase pathways. RGD/YIGSR modifications demonstrate beneficial effects across a 15 mm sciatic nerve gap in axonal regeneration and functional recovery. In addition, increased vascularization is observed in the RGD/YIGSR-PCL group, which might contribute to their beneficial effects on nerve regeneration. These findings indicate the potential of the RGD/YIGSR-PCL conduit to promote axonal regeneration and functional recovery, making the RGD/YIGSR-PCL conduit an attractive candidate for the treatment of a critical nerve defect.
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Affiliation(s)
- Lei Zhu
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Kai Wang
- State Key Laboratory of Medicinal Chemical Biology; Key Laboratory of Bioactive Materials; Ministry of Education; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Life Science; Nankai University; Tianjin 300071 China
| | - Teng Ma
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Liangliang Huang
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Bing Xia
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Shu Zhu
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Yafeng Yang
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Zhongyang Liu
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Xin Quan
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Kai Luo
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Deling Kong
- State Key Laboratory of Medicinal Chemical Biology; Key Laboratory of Bioactive Materials; Ministry of Education; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); College of Life Science; Nankai University; Tianjin 300071 China
| | - Jinghui Huang
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
| | - Zhuojing Luo
- Institute of Orthopaedics; Xijing Hospital; The Fourth Military Medical University; Xi'an Shaanxi 710032 China
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10
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Polycaprolactone/Amino-ฮฒ-Cyclodextrin Inclusion Complex Prepared by an Electrospinning Technique. Polymers (Basel) 2016; 8:polym8110395. [PMID: 30974680 PMCID: PMC6432087 DOI: 10.3390/polym8110395] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 10/26/2016] [Accepted: 11/01/2016] [Indexed: 01/07/2023] Open
Abstract
Electrospun scaffolds of neat poly-ฮต-caprolactone (PCL), poly-ฮต-caprolactone/ฮฒ-cyclodextrin inclusion complex (PCL/ฮฒ-CD) and poly-ฮต-caprolactone amino derivative inclusion complex (PCL/ฮฒ-CD-NHโ) were prepared by the electrospinning technique. The obtained mats were analyzed by a theoretical model using the HartreeโปFock method with an STO-3G basis set, and characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy-attenuated total reflectance (FTIR-ATR), differential scanning calorimetry (DSC), confocal-Raman spectroscopy, proton nuclear magnetic resonance (ยนHNMR) and contact angle measure (CA). Different mixtures of solvents, such as dimethylformamide (DMF)-tetrahydrofuran (THF), dichlormethane (DCM)-dimethyl sulfoxide (DMSO) and 2,2,2-Trifluoroethanol (TFE), were tested in the fiber preparation. The results indicate that electrospun nanofibers have a pseudorotaxane structure and when it was prepared using a 2,2,2-Trifluoroethanol (TFE) as solvent, the nanofibers were electrospun well and, with the other solvents, fibers present defects such as molten fibers and bead-like defects into the fiber structure. This work provides insights into the design of PCL/ฮฒ-CD-NHโ based scaffolds that could have applications in the biomedical field.
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11
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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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12
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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(๐-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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13
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Chen J, Crawford R, Chen C, Xiao Y. The key regulatory roles of the PI3K/Akt signaling pathway in the functionalities of mesenchymal stem cells and applications in tissue regeneration. TISSUE ENGINEERING PART B-REVIEWS 2013; 19:516-28. [PMID: 23651329 DOI: 10.1089/ten.teb.2012.0672] [Citation(s) in RCA: 166] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Mesenchymal stem cells (MSCs) are multipotent cells that can differentiate into various cell types and have been widely used in tissue engineering application. In tissue engineering, a scaffold, MSCs and growth factors are used as essential components and their interactions have been regarded to be important for regeneration of tissues. A critical problem for MSCs in tissue engineering is their low survival ability and functionality. Most MSCs are going to be apoptotic after transplantation. Therefore, increasing MSC survival ability and functionalities is the key for potential applications of MSCs. Several approaches have been studied to increase MSC tissue forming capacity including application of growth factors, overexpression of stem cell regulatory genes, and improvement of biomaterials for scaffolds. The effects of these approaches on MSCs have been associated with activation of the phosphoinositide 3-kinase (PI3K)/Akt signaling pathway. The pathway plays central regulatory roles in MSC survival, proliferation, migration, angiogenesis, cytokine production, and differentiation. In this review, we summarize and discuss the literatures related to the roles of the PI3K/Akt pathway in the functionalities of MSCs and the involvement of the pathway in biomaterials-increased MSC functionalities. Biomaterials have been modified in their properties and surface structure and loaded with growth factors to increase MSC functionalities. Several studies demonstrated that the biomaterials-increased MSC functionalities are mediated by the activation of the PI3K/Akt pathway.
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Affiliation(s)
- Jiezhong Chen
- 1 Institute of Health and Biomedical Innovation, Queensland University of Technology , Brisbane, Australia
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