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Liu P, Liu X, Yang L, Qian Y, Lu Q, Shi A, Wei S, Zhang X, Lv Y, Xiang J. Enhanced hemocompatibility and rapid magnetic anastomosis of electrospun small-diameter artificial vascular grafts. Front Bioeng Biotechnol 2024; 12:1331078. [PMID: 38328445 PMCID: PMC10847591 DOI: 10.3389/fbioe.2024.1331078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 01/15/2024] [Indexed: 02/09/2024] Open
Abstract
Background: Small-diameter (<6 mm) artificial vascular grafts (AVGs) are urgently required in vessel reconstructive surgery but constrained by suboptimal hemocompatibility and the complexity of anastomotic procedures. This study introduces coaxial electrospinning and magnetic anastomosis techniques to improve graft performance. Methods: Bilayer poly(lactide-co-caprolactone) (PLCL) grafts were fabricated by coaxial electrospinning to encapsulate heparin in the inner layer for anticoagulation. Magnetic rings were embedded at both ends of the nanofiber conduit to construct a magnetic anastomosis small-diameter AVG. Material properties were characterized by micromorphology, fourier transform infrared (FTIR) spectra, mechanical tests, in vitro heparin release and hemocompatibility. In vivo performance was evaluated in a rabbit model of inferior vena cava replacement. Results: Coaxial electrospinning produced PLCL/heparin grafts with sustained heparin release, lower platelet adhesion, prolonged clotting times, higher Young's modulus and tensile strength versus PLCL grafts. Magnetic anastomosis was significantly faster than suturing (3.65 ± 0.83 vs. 20.32 ± 3.45 min, p < 0.001) and with higher success rate (100% vs. 80%). Furthermore, magnetic AVG had higher short-term patency (2 days: 100% vs. 60%; 7 days: 40% vs. 0%) but similar long-term occlusion as sutured grafts. Conclusion: Coaxial electrospinning improved hemocompatibility and magnetic anastomosis enhanced implantability of small-diameter AVG. Short-term patency was excellent, but further optimization of anticoagulation is needed for long-term patency. This combinatorial approach holds promise for vascular graft engineering.
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Affiliation(s)
- Peng Liu
- Center for Regenerative and Reconstructive Medicine, Med-X Institute, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
- National Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Xin Liu
- Department of Graduate School, Xi’an Medical University, Xi’an, Shaanxi, China
| | - Lifei Yang
- National Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Yerong Qian
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Qiang Lu
- Department of Geriatric Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Aihua Shi
- National Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Shasha Wei
- National Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Xufeng Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Yi Lv
- Center for Regenerative and Reconstructive Medicine, Med-X Institute, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
- National Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
| | - Junxi Xiang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, China
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Feng ZG, Fang Z, Xing Y, Wang H, Geng X, Ye L, Zhang A, Gu Y. Remodeling of Structurally Reinforced (TPU+PCL/PCL)-Hep Electro-spun Small Diameter Bilayer Vascular Grafts Interposed in Rat Ab-dominal Aorta. Biomater Sci 2022; 10:4257-4270. [DOI: 10.1039/d1bm01653a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As the thermoplastic polyurethane (TPU) elastomer possesses good biocompatibility and mechanical properties similar to native vascular tissues as well, it is intended to co-electrospin with poly(ε-caprolactone) (PCL) onto the outer...
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Zhao L, Li X, Yang L, Sun L, Mu S, Zong H, Li Q, Wang F, Song S, Yang C, Zhao C, Chen H, Zhang R, Wang S, Dong Y, Zhang Q. Evaluation of remodeling and regeneration of electrospun PCL/fibrin vascular grafts in vivo. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 118:111441. [PMID: 33255034 PMCID: PMC7445127 DOI: 10.1016/j.msec.2020.111441] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 08/16/2020] [Accepted: 08/21/2020] [Indexed: 12/14/2022]
Abstract
The success of artificial vascular graft in the host to obtain functional tissue regeneration and remodeling is a great challenge in the field of small diameter tissue engineering blood vessels. In our previous work, poly(ε-caprolactone) (PCL)/fibrin vascular grafts were fabricated by electrospinning. It was proved that the PCL/fibrin vascular graft was a suitable small diameter tissue engineering vascular scaffold with good biomechanical properties and cell compatibility. Here we mainly examined the performance of PCL/fibrin vascular graft in vivo. The graft showed randomly arranged nanofiber structure, excellent mechanical strength, higher compliance and degradation properties. At 9 months after implantation in the rat abdominal aorta, the graft induced the regeneration of neoarteries, and promoted ECM deposition and rapid endothelialization. More importantly, the PCL/fibrin vascular graft showed more microvessels density and fewer calcification areas at 3 months, which was beneficial to improve cell infiltration and proliferation. Moreover, the ratio of M2/M1macrophage in PCL/fibrin graft had a higher expression level and the secretion amount of pro-inflammatory cytokines started to increase, and then decreased to similar to the native artery. Thus, the electrospun PCL/fibrin tubular vascular graft had great potential to become a new type of artificial blood vessel scaffold that can be implanted in vivo for long term.
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Affiliation(s)
- Liang Zhao
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China; Key Laboratory of Cardiac Structure Research, Zhengzhou Seventh People's Hospital, Zhengzhou, China.
| | - Xiafei Li
- College of Medical Engineering, Xinxiang Medical University, Xinxiang, China
| | - Lei Yang
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China; First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Lulu Sun
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China
| | - Songfeng Mu
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China; First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China
| | - Haibin Zong
- College of Medical Engineering, Xinxiang Medical University, Xinxiang, China
| | - Qiong Li
- Nursing School, Xinxiang Medical University, Xinxiang, China
| | - Fengyao Wang
- The First Affiliated Hospital, Henan University of Science and Technology, Luoyang, China
| | - Shuang Song
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China
| | - Chengqiang Yang
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China
| | - Changhong Zhao
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China
| | - Hongli Chen
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China
| | - Rui Zhang
- Service Center for Transformation of Scientific and Technological Achievements, Xinxiang Medical University, Xinxiang, China
| | - Shicheng Wang
- General Surgery Department, West District Hospital of Nanyang The First People's Hospital, Nanyang, China
| | - Yuzhen Dong
- First Affiliated Hospital, Xinxiang Medical University, Xinxiang, China.
| | - Qiqing Zhang
- College of Life Science and Technology, Xinxiang Medical University, Xinxiang, China.
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4
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Skovrind I, Harvald EB, Juul Belling H, Jørgensen CD, Lindholt JS, Andersen DC. Concise Review: Patency of Small-Diameter Tissue-Engineered Vascular Grafts: A Meta-Analysis of Preclinical Trials. Stem Cells Transl Med 2019; 8:671-680. [PMID: 30920771 PMCID: PMC6591545 DOI: 10.1002/sctm.18-0287] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 03/04/2019] [Indexed: 12/13/2022] Open
Abstract
Several patient groups undergoing small‐diameter (<6 mm) vessel bypass surgery have limited autologous vessels for use as grafts. Tissue‐engineered vascular grafts (TEVG) have been suggested as an alternative, but the ideal TEVG remains to be generated, and a systematic overview and meta‐analysis of clinically relevant studies is lacking. We systematically searched PubMed and Embase databases for (pre)clinical trials and identified three clinical and 68 preclinical trials ([>rabbit]; 873 TEVGs) meeting the inclusion criteria. Preclinical trials represented low to medium risk of bias, and binary logistic regression revealed that patency was significantly affected by recellularization, TEVG length, TEVG diameter, surface modification, and preconditioning. In contrast, scaffold types were less important. The patency was 63.5%, 89%, and 100% for TEVGs with a median diameter of 3 mm, 4 mm, and 5 mm, respectively. In the group of recellularized TEVGs, patency was not improved by using smooth muscle cells in addition to endothelial cells nor affected by the endothelial origin, but seems to benefit from a long‐term (46–240 hours) recellularization time. Finally, data showed that median TEVG length (5 cm) and median follow‐up (56 days) used in preclinical settings are relatively inadequate for direct clinical translation. In conclusion, our data imply that future studies should consider a TEVG design that at least includes endothelial recellularization and bioreactor preconditioning, and we suggest that more standard guidelines for testing and reporting TEVGs in large animals should be considered to enable interstudy comparisons and favor a robust and reproducible outcome as well as clinical translation.
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Affiliation(s)
- Ida Skovrind
- Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense C, Denmark.,Department of Cardiovascular and Renal Research, University of Southern Denmark, Odense C, Denmark
| | - Eva Bang Harvald
- Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense C, Denmark.,Center for Vascular Regeneration, Odense University Hospital, Odense C, Denmark.,Department of Cardiovascular and Renal Research, University of Southern Denmark, Odense C, Denmark
| | - Helene Juul Belling
- Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense C, Denmark.,Department of Cardiovascular and Renal Research, University of Southern Denmark, Odense C, Denmark
| | | | - Jes Sanddal Lindholt
- Department of Cardiac, Thoracic, and Vascular Surgery, Odense University Hospital, Odense C, Denmark
| | - Ditte Caroline Andersen
- Laboratory of Molecular and Cellular Cardiology, Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Odense C, Denmark.,Center for Vascular Regeneration, Odense University Hospital, Odense C, Denmark.,Department of Cardiovascular and Renal Research, University of Southern Denmark, Odense C, Denmark.,Clinical Institute, University of Southern Denmark, Odense C, Denmark
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5
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Yang Y, Yang JT, Chen XH, Qin BG, Li FG, Chen YX, Gu LQ, Zhu JK, Li P. Construction of tissue-engineered lymphatic vessel using human adipose derived stem cells differentiated lymphatic endothelial like cells and decellularized arterial scaffold: A preliminary study. Biotechnol Appl Biochem 2017; 65:428-434. [PMID: 28981171 DOI: 10.1002/bab.1618] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 09/29/2017] [Indexed: 12/19/2022]
Abstract
We have previously demonstrated that human adipose-derived stem cells (hADSCs) can be differentiated into lymphatic endothelial like cells. The purpose of this study was to investigate the feasibility of utilizing the induced lymphatic endothelial like cells and decellularized arterial scaffold to construct the tissue-engineered lymphatic vessel. The hADSCs were isolated from adipose tissue in healthy adults and were characterized the multilineage differentiation potential. Decellularized arterial scaffold was prepared using the Triton x-100 method. ADSCs were differentiated into lymphatic-like endothelial cells, and the induced cells were then seeded onto the decellularized arterial scaffold to engineer the lymphatic vessel. The histological analyses were performed to examine the endothelialized construct. The decellularized arterial scaffold was successfully obtained and was able to maintain its vessel morphology. The isolated ADSCs can be differentiated into osteocytes and adipocytes. After seeding onto the scaffold, the seeded cells attached and grew well on the decellularized arterial scaffold. Our preliminary results demonstrated that the induced lymphatic endothelial like cells combined with decellularized arterial scaffold could be utilized to successfully engineer the lymphatic vessel. Our findings may be helpful for the development of tissue-engineering of the lymphatic graft.
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Affiliation(s)
- Yi Yang
- Department of Microsurgery and Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Jian-Tao Yang
- Department of Microsurgery and Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Xiao-Hu Chen
- Department of Orthopedic Trauma, The Hui Ya Hospital of Sun Yat-sen University, Huizhou, People's Republic of China
| | - Ben-Gang Qin
- Department of Microsurgery and Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Fu-Gui Li
- Department of Cancer Institute, The Zhong Shan Hospital of Sun Yat-sen University, Zhongshan, People's Republic of China
| | - Yun-Xian Chen
- Department of Hematology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Li-Qiang Gu
- Department of Microsurgery and Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Jia-Kai Zhu
- Department of Microsurgery and Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Ping Li
- Department of Microsurgery and Orthopedic Trauma, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People's Republic of China
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6
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Alshomer F, Chaves C, Serra T, Ahmed I, Kalaskar DM. Micropatterning of nanocomposite polymer scaffolds using sacrificial phosphate glass fibers for tendon tissue engineering applications. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2017; 13:1267-1277. [DOI: 10.1016/j.nano.2017.01.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 12/12/2016] [Accepted: 01/04/2017] [Indexed: 12/19/2022]
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7
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Fukayama T, Ozai Y, Shimokawadoko H, Aytemiz D, Tanaka R, Machida N, Asakura T. Effect of fibroin sponge coating on in vivo performance of knitted silk small diameter vascular grafts. Organogenesis 2016; 11:137-51. [PMID: 26496652 DOI: 10.1080/15476278.2015.1093268] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
Vascular grafts under 5 mm or less in diameter are not developed due to a problem caused by early thrombus formation, neointimal hyperplasia, etc. Bombyx mori silk fibroin (SF) which has biodegradability and tissue infiltration is focused as tube and coating material of vascular grafts. Coating is an important factor to maintain the strength of the anastomotic region of vascular grafts, and to prevent the blood leak from the vascular grafts after implantation. Therefore, in this research, we focused on the SF concentration of the coating solution, and tissue infiltration and remodeling were compared among each SF concentration. Silk poly (-ethylene) glycol diglycidyl ether (PGDE) coating with concentrations of 1.0%, 2.5%, 5.0%, and 7.5% SF were applied for the double-raschel knitted small-sized vessel with 1.5 mm diameter and 1cm in length. The grafts were implanted in the rat abdominal aorta and removed after 3 weeks or 3 months. Vascular grafts patency was monitored by ultrasound, and morphological evaluation was performed by histopathological examination. SF concentration had no significant effects on the patency rate. However, tissue infiltration was significantly higher in the sample of 2.5% SF in 3 weeks, and 1.0% and 2.5% SF in 3 months. Also, in comparison of length inside of the graft, stenosis were not found in 3 weeks, however, found with 5.0% and 7.5% in 3 months. From these results, it is clear that 2.5% SF coating is the most suitable concentration, based on the characteristics of less stenosis, early tissue infiltration, and less neointimal hyperplasia.
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Affiliation(s)
- Toshiharu Fukayama
- a Department of Veterinary Surgery ; Tokyo University of Agriculture & Technology ; Fuchu, Tokyo , Japan
| | - Yusuke Ozai
- a Department of Veterinary Surgery ; Tokyo University of Agriculture & Technology ; Fuchu, Tokyo , Japan
| | - Haruka Shimokawadoko
- b Department of Biotechnology ; Tokyo University of Agriculture & Technology; Koganei , Tokyo , Japan
| | - Derya Aytemiz
- b Department of Biotechnology ; Tokyo University of Agriculture & Technology; Koganei , Tokyo , Japan
| | - Ryou Tanaka
- a Department of Veterinary Surgery ; Tokyo University of Agriculture & Technology ; Fuchu, Tokyo , Japan
| | - Noboru Machida
- c Laboratory of Veterinary Clinical Oncology; Tokyo University of Agriculture & Technology ; Fuchu, Tokyo , Japan
| | - Tetsuo Asakura
- b Department of Biotechnology ; Tokyo University of Agriculture & Technology; Koganei , Tokyo , Japan
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8
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Askari F, Solouk A, Shafieian M, Seifalian AM. Stem cells for tissue engineered vascular bypass grafts. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2016; 45:999-1010. [DOI: 10.1080/21691401.2016.1198366] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Forough Askari
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Atefeh Solouk
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Mehdi Shafieian
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Alexander M. Seifalian
- Centre for Nanotechnology and Regenerative Medicine, University College London, London, UK
- Royal Free Hampstead National Health Service Trust Hospital, London, UK
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9
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Kloczko E, Nikkhah D, Yildirimer L. Scaffolds for hand tissue engineering: the importance of surface topography. J Hand Surg Eur Vol 2015; 40:973-85. [PMID: 25770899 DOI: 10.1177/1753193415571308] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 01/14/2015] [Indexed: 02/03/2023]
Abstract
Tissue engineering is believed to have great potential for the reconstruction of the hand after trauma, congenital absence and tumours. Due to the presence of multiple distinct tissue types, which together function in a precisely orchestrated fashion, the hand counts among the most complex structures to regenerate. As yet the achievements have been limited. More recently, the focus has shifted towards scaffolds, which provide a three-dimensional framework to mimic the natural extracellular environment for specific cell types. In particular their surface structures (or topographies) have become a key research focus to enhance tissue-specific cell attachment and growth into fully functioning units. This article reviews the current understanding in hand tissue engineering before focusing on the potential for scaffold topographical features on micro- and nanometre scales to achieve better functional regeneration of individual and composite tissues.
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Affiliation(s)
- E Kloczko
- UCL School of Life and Medical Sciences, University College London, London, UK
| | - D Nikkhah
- The Queen Victoria Hospital, East Grinstead, UK
| | - L Yildirimer
- Centre for Nanotechnology & Regenerative Medicine, UCL Division of Surgery & Interventional Science, University College London, London, UK Department of Plastic and Reconstructive Surgery, Royal Free Hospital Hampstead NHS Trust, London, UK
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Uzarski JS, Cores J, McFetridge PS. Physiologically Modeled Pulse Dynamics to Improve Function in In Vitro-Endothelialized Small-Diameter Vascular Grafts. Tissue Eng Part C Methods 2015; 21:1125-34. [PMID: 25996580 PMCID: PMC4638211 DOI: 10.1089/ten.tec.2015.0110] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 05/18/2015] [Indexed: 01/01/2023] Open
Abstract
The lack of a functional endothelium on small-diameter vascular grafts leads to intimal hyperplasia and thrombotic occlusion. Shear stress conditioning through controlled hydrodynamics within in vitro perfusion bioreactors has shown promise as a mechanism to drive endothelial cell (EC) phenotype from an activated, pro-inflammatory wound state toward a quiescent functional state that inhibits responses that lead to occlusive failure. As part of an overall design strategy to engineer functional vascular grafts, we present a novel two-phase shear conditioning approach to improve graft endothelialization. Axial rotation was first used to seed uniform EC monolayers onto the lumenal surface of decellularized scaffolds derived from the human umbilical vein. Using computer-controlled perfusion circuits, a flow-ramping paradigm was applied to adapt endothelia to arterial levels of fluid shear stress and pressure without graft denudation. The effects of constant pulse frequencies (CF) on EC quiescence were then compared with pulse frequencies modeled from temporal fluctuations in blood flow observed in vivo, termed physiologically modeled pulse dynamics (PMPD). Constructs exposed to PMPD for 72 h expressed a more functional transcriptional profile, lower metabolic activity (39.8% ± 8.4% vs. 62.5% ± 11.5% reduction, p = 0.012), and higher nitric oxide production (80.42 ± 23.93 vs. 48.75 ± 6.93 nmol/10(5) cells, p = 0.028) than those exposed to CF. By manipulating in vitro flow conditions to mimic natural physiology, endothelialized vascular grafts can be stimulated to express a nonactivated phenotype that would better inhibit peripheral cell adhesion and smooth muscle cell hyperplasia, conditions that typically lead to occlusive failure. Development of robust, functional endothelia on vascular grafts by modulation of environmental conditions within perfusion bioreactors may ultimately improve clinical outcomes in vascular bypass grafting.
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Affiliation(s)
- Joseph S Uzarski
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida , Gainesville, Florida
| | - Jhon Cores
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida , Gainesville, Florida
| | - Peter S McFetridge
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida , Gainesville, Florida
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11
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Zhao D, Sun Y, Wei X, Liang H, Zhao L, Dong X, Chen H, Chen W, Yang J, Wang X, Gao F, Yi W. cIAP1 attenuates shear stress-induced hBMSC apoptosis for tissue-engineered blood vessels through the inhibition of the mitochondrial apoptosis pathway. Life Sci 2015; 137:81-8. [DOI: 10.1016/j.lfs.2015.07.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 07/13/2015] [Accepted: 07/14/2015] [Indexed: 01/21/2023]
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12
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Fukayama T, Takagi K, Tanaka R, Hatakeyama Y, Aytemiz D, Suzuki Y, Asakura T. Biological reaction to small-diameter vascular grafts made of silk fibroin implanted in the abdominal aortae of rats. Ann Vasc Surg 2014; 29:341-52. [PMID: 25449988 DOI: 10.1016/j.avsg.2014.10.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 10/02/2014] [Accepted: 10/02/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND Bombyx mori silk fibroin (SF) is biocompatible and degradable and has been proposed as a new material for small-diameter vascular grafts. We compared biological reactions to vascular grafts made of SF and polyethylene terephthalate (PET) to reveal the potential ability of SF as a base and/or coating materials for vascular prostheses. METHODS SF was combined with PET or gelatin (G) to make 4 types of vascular grafts (SF/SF, SF/G, PET/SF, and PET/G, shown as "base/coating material," respectively), which are 1.5 mm in diameter and 10 mm in length. The 4 types of grafts (n = 6, respectively) were implanted into rat abdominal aortae and explanted 2 weeks or 3 months later. RESULTS Two weeks after implantation, there are no significant differences among the 4 kinds of grafts in biological reactions evaluated by histopathologic examination. However, a remarkable difference was observed after 3 months. The area of tissue infiltration into the inside of the graft wall was approximately 2.5 times larger in SF/SF than that in PET/G. The endothelialization was achieved almost 100% in SF/SF, despite only 50% was achieved in PET/G. CONCLUSIONS Results show that SF has a higher potential as a base of vascular grafts than the commercially available PET/G graft. The larger tissue infiltration area in PET/SF compared with that in PET/G also indicates the potential of SF as a coating material. In the present study, SF delivered promising results as base and coating materials for small-diameter vascular prostheses.
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Affiliation(s)
- Toshiharu Fukayama
- Department of Veterinary Surgery, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Keisuke Takagi
- Department of Veterinary Surgery, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
| | - Ryou Tanaka
- Department of Veterinary Surgery, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan.
| | - Yui Hatakeyama
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo, Japan
| | - Derya Aytemiz
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo, Japan
| | - Yu Suzuki
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo, Japan
| | - Tetsuo Asakura
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo, Japan
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13
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Babczyk P, Conzendorf C, Klose J, Schulze M, Harre K, Tobiasch E. Stem Cells on Biomaterials for Synthetic Grafts to Promote Vascular Healing. J Clin Med 2014; 3:39-87. [PMID: 26237251 PMCID: PMC4449663 DOI: 10.3390/jcm3010039] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2013] [Revised: 10/28/2013] [Accepted: 11/16/2013] [Indexed: 12/25/2022] Open
Abstract
This review is divided into two interconnected parts, namely a biological and a chemical one. The focus of the first part is on the biological background for constructing tissue-engineered vascular grafts to promote vascular healing. Various cell types, such as embryonic, mesenchymal and induced pluripotent stem cells, progenitor cells and endothelial- and smooth muscle cells will be discussed with respect to their specific markers. The in vitro and in vivo models and their potential to treat vascular diseases are also introduced. The chemical part focuses on strategies using either artificial or natural polymers for scaffold fabrication, including decellularized cardiovascular tissue. An overview will be given on scaffold fabrication including conventional methods and nanotechnologies. Special attention is given to 3D network formation via different chemical and physical cross-linking methods. In particular, electron beam treatment is introduced as a method to combine 3D network formation and surface modification. The review includes recently published scientific data and patents which have been registered within the last decade.
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Affiliation(s)
- Patrick Babczyk
- Department of Natural Science, Bonn-Rhein-Sieg University of Applied Science, Von-Liebig-Street 20, Rheinbach 53359, Germany.
| | - Clelia Conzendorf
- Faculty of Mechanical Engineering/Process Engineering, University of Applied Science Dresden, Friedrich-List-Platz 1, Dresden 01069, Germany.
| | - Jens Klose
- Faculty of Mechanical Engineering/Process Engineering, University of Applied Science Dresden, Friedrich-List-Platz 1, Dresden 01069, Germany.
| | - Margit Schulze
- Department of Natural Science, Bonn-Rhein-Sieg University of Applied Science, Von-Liebig-Street 20, Rheinbach 53359, Germany.
| | - Kathrin Harre
- Faculty of Mechanical Engineering/Process Engineering, University of Applied Science Dresden, Friedrich-List-Platz 1, Dresden 01069, Germany.
| | - Edda Tobiasch
- Department of Natural Science, Bonn-Rhein-Sieg University of Applied Science, Von-Liebig-Street 20, Rheinbach 53359, Germany.
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14
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Rapid production of autologous fibrin hydrogels for cellular encapsulation in organ regeneration. Methods Mol Biol 2013; 1001:145-52. [PMID: 23494426 DOI: 10.1007/978-1-62703-363-3_12] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Autologous hydrogel manufacture is an exciting technique within the field of regenerative medicine. Fibrin is a protein with many biocompatible and regenerative features. The ability to generate fibrin scaffolds with the necessary matrix topography for cell integration, from a patient's autologous tissue, could improve the translation of many tissue engineering efforts from bench to clinical application. Here we describe the rapid extraction and production of fibrin hydrogels for development of organs, using a simple low-cost series of centrifugations and ethanol precipitation, which produces hydrogels of a more predictable amount and morphology.
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15
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Abstract
Vascular occlusion remains the leading cause of death in Western countries, despite advances made in balloon angioplasty and conventional surgical intervention. Vascular surgery, such as CABG surgery, arteriovenous shunts, and the treatment of congenital anomalies of the coronary artery and pulmonary tracts, requires biologically responsive vascular substitutes. Autografts, particularly saphenous vein and internal mammary artery, are the gold-standard grafts used to treat vascular occlusions. Prosthetic grafts have been developed as alternatives to autografts, but their low patency owing to short-term and intermediate-term thrombosis still limits their clinical application. Advances in vascular tissue engineering technology-such as self-assembling cell sheets, as well as scaffold-guided and decellularized-matrix approaches-promise to produce responsive, living conduits with properties similar to those of native tissue. Over the past decade, vascular tissue engineering has become one of the fastest-growing areas of research, and is now showing some success in the clinic.
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Affiliation(s)
- Dawit G Seifu
- Laboratory for Biomaterials and Bioengineering, Department of Min-Met-Materials Engineering and Quebec University Hospital Center, Laval University, Quebec City, QC G1V 0A6, Canada
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16
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Cittadella G, de Mel A, Dee R, De Coppi P, Seifalian AM. Arterial Tissue Regeneration for Pediatric Applications: Inspiration From Up-to-Date Tissue-Engineered Vascular Bypass Grafts. Artif Organs 2013; 37:423-34. [DOI: 10.1111/aor.12022] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Giorgio Cittadella
- UCL Centre for Nanotechnology & Regenerative Medicine; University College London; London; UK
| | - Achala de Mel
- UCL Centre for Nanotechnology & Regenerative Medicine; University College London; London; UK
| | - Ryan Dee
- UCL Centre for Nanotechnology & Regenerative Medicine; University College London; London; UK
| | - Paolo De Coppi
- Institute of Child Health and Great Ormond Street Hospital; University College London; London; UK
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17
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Elastic, double-layered poly (l-lactide-co-ϵ-caprolactone) scaffold for long-term vascular reconstruction. J BIOACT COMPAT POL 2013. [DOI: 10.1177/0883911513477750] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Synthetic vessel grafts have been used as vascular substitutes for cardiovascular bypass procedures. In this study, we developed a novel tubular double-layered poly(l-lactide-co-ϵ-caprolactone) scaffold that did not require pretreatment with cell seeding by promoting autologous tissue regeneration by inducing the proliferation and differentiation of endothelial and smooth muscle progenitor cells after implantation. The patency and mechanical properties were maintained for one year after implantation, although 95% of the poly(l-lactide-co-ϵ-caprolactone) scaffolds had degraded. After this period, there was a lining of endothelial cells, an accumulation of collagen and elastin, and the development of neovascularization inside the poly(l-lactide-co-ϵ-caprolactone).
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18
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Tan A, Farhatnia Y, de Mel A, Rajadas J, Alavijeh MS, Seifalian AM. Inception to actualization: Next generation coronary stent coatings incorporating nanotechnology. J Biotechnol 2013; 164:151-70. [DOI: 10.1016/j.jbiotec.2013.01.020] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Revised: 01/09/2013] [Accepted: 01/11/2013] [Indexed: 02/07/2023]
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19
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Tissue engineered vascular grafts--preclinical aspects. Int J Cardiol 2012; 167:1091-100. [PMID: 23040078 DOI: 10.1016/j.ijcard.2012.09.069] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 06/01/2012] [Accepted: 09/14/2012] [Indexed: 11/23/2022]
Abstract
Tissue engineering enables the development of fully biological vascular substitutes that restore, maintain and improve tissue function in a manner identical to natural host tissue. However the development of the appropriate preclinical evaluation techniques for the generation of fully functional tissue-engineered vascular graft (TEVG) is required to establish their safety for use in clinical trials and to test clinical effectiveness. This review gives an insight on the various preclinical studies performed in the area of tissue engineered vascular grafts highlighting the different strategies used with respect to cells and scaffolds, typical animal models used and the major in vivo evaluation studies that have been carried out. The review emphasizes the combined effort of engineers, biologists and clinicians which can take this clinical research to new heights of regenerative therapy.
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20
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Luderer F, Begerow I, Schmidt W, Martin H, Grabow N, Bünger CM, Schareck W, Schmitz KP, Sternberg K. Enhanced visualization of biodegradable polymeric vascular scaffolds by incorporation of gold, silver and magnetite nanoparticles. J Biomater Appl 2012; 28:219-31. [PMID: 22492201 DOI: 10.1177/0885328212443393] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Due to improved tissue regeneration and the enabling of post-operative minimally invasive interventions in the same vessel segment, biodegradable polymeric scaffolds represent a competitive approach to permanent metallic stents in vascular applications. Despite these advantages some challenges, such as the improvement of the scaffold mechanics and enhancement of scaffold visibility during the implantation procedure, are persisting. Therefore, the scope of our studies was to investigate the potential of gold, silver and magnetite nanoparticles incorporated in a polymeric blend of poly(L-lactide)/poly(4-hydroxybutyrate) for image enhancement in X-ray, magnetic resonance or near-infrared imaging. Their impact on mechanical properties of such modified scaffold materials was also evaluated.
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Affiliation(s)
- Frank Luderer
- Institute for Biomedical Engineering, University of Rostock, Rostock, Germany.
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21
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Sedaghati T, Yang SY, Mosahebi A, Alavijeh MS, Seifalian AM. Nerve regeneration with aid of nanotechnology and cellular engineering. Biotechnol Appl Biochem 2012; 58:288-300. [PMID: 21995532 DOI: 10.1002/bab.51] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Repairing nerve defects with large gaps remains one of the most operative challenges for surgeons. Incomplete recovery from peripheral nerve injuries can produce a diversity of negative outcomes, including numbness, impairment of sensory or motor function, possibility of developing chronic pain, and devastating permanent disability. In the last few years, numerous microsurgical techniques, such as coaptation, nerve autograft, and different biological or polymeric nerve conduits, have been developed to reconstruct a long segment of damaged peripheral nerve. A few of these techniques are promising and have become popular among surgeons. Advancements in the field of tissue engineering have led to development of synthetic nerve conduits as an alternative for the nerve autograft technique, which is the current practice to bridge nerve defects with gaps larger than 30 mm. However, to date, despite significant progress in this field, no material has been found to be an ideal alternative to the nerve autograft. This article briefly reviews major up-to-date published studies using different materials as an alternative to the nerve autograft to bridge peripheral nerve gaps in an attempt to assess their ability to support and enhance nerve regeneration and their prospective drawbacks, and also highlights the promising hope for nerve regeneration with the next generation of nerve conduits, which has been significantly enhanced with the tissue engineering approach, especially with the aid of nanotechnology in development of the three-dimensional scaffold. The goal is to determine potential alternatives for nerve regeneration and repair that are simply and directly applicable in clinical conditions.
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Affiliation(s)
- Tina Sedaghati
- UCL Centre for Nanotechnology and Regenerative Medicine, UCL Division of Surgery and Interventional Science, University College London, London, UK
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22
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Punshon G, Vara DS, Sales KM, Seifalian AM. The long-term stability in gene expression of human endothelial cells permits the production of large numbers of cells suitable for use in regenerative medicine. Biotechnol Appl Biochem 2011; 58:371-5. [DOI: 10.1002/bab.48] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2011] [Accepted: 08/12/2011] [Indexed: 02/06/2023]
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23
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Barsotti MC, Felice F, Balbarini A, Di Stefano R. Fibrin as a scaffold for cardiac tissue engineering. Biotechnol Appl Biochem 2011; 58:301-10. [PMID: 21995533 DOI: 10.1002/bab.49] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Accepted: 08/12/2011] [Indexed: 12/16/2022]
Abstract
Fibrin is a natural biopolymer with many interesting properties, such as biocompatibility, bioresorbability, ease of processing, ability to be tailored to modify the conditions of polymerization, and potential for incorporation of both cells and cell mediators. Moreover, the fibrin network has a nanometric fibrous structure, mimicking extracellular matrix, and it can also be used in autologous applications. Therefore, fibrin has found many applications in tissue engineering, combined with cells, growth factors, or drugs. Because a major limitation of cardiac cell therapy is low cell engraftment, the use of biodegradable scaffolds for specific homing and in situ cell retention is desirable. Thus, fibrin-based injectable cardiac tissue engineering may enhance cell therapy efficacy. Fibrin-based biomaterials can also be used for engineering heart valves or cardiac patches. The aim of this review is to show cardiac bioengineering uses of fibrin, both as a cell delivery vehicle and as an implantable biomaterial.
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Affiliation(s)
- Maria Chiara Barsotti
- Cardiovascular Research Laboratory, Cardiac, Thoracic and Vascular Department, University of Pisa, Pisa, Italy.
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24
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Seifalian AM. Editorial: Manufacturing living organs using tissue engineering strategy. Biotechnol Appl Biochem 2011; 58:285-7. [DOI: 10.1002/bab.54] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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25
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Punshon G, Vara DS, Sales KM, Seifalian AM. A novel method for the extraction and culture of progenitor stem cells from human peripheral blood for use in regenerative medicine. Biotechnol Appl Biochem 2011; 58:328-34. [PMID: 21995535 DOI: 10.1002/bab.47] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Accepted: 08/01/2011] [Indexed: 11/06/2022]
Abstract
Human peripheral blood (HPB) contains both circulating endothelial cells (CECs) and endothelial progenitor stem cells (EPCs), which may be suitable for use in regenerative medicine. There has been considerable interest in using these cells, but there is no "gold standard" technique for isolating these cells. The aim of this study was to characterize and compare a number of different extraction and culture techniques to develop a system to isolate and culture cells. EPC and CEC were isolated from HPB using either Histopaque-1077 or Lymphoprep. The two isolation methods were compared for the number of cells isolated, cell metabolism, and RNA expression. Both isolations produced viable cells and were comparable. The tissue culture method employed does have a significant effect on the cell population with regard to medium choice, fetal bovine serum concentration, and surface modification of the culture surface. In conclusion, it can be seen that although this study and previous work can suggest a basis for culture, further work to develop an optimized and agreed "gold standard" culture regime for EPC from HPB is required to maximize the potential of this source of cells for regenerative medicine and to translate its clinical use in the future.
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Affiliation(s)
- Geoffrey Punshon
- Centre for Nanotechnology and Regenerative Medicine, University College London Division of Surgery and Interventional Science, University College London, London, United Kingdom
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