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Zhu X, Wang C, Bai H, Zhang J, Wang Z, Li Z, Zhao X, Wang J, Liu H. Functionalization of biomimetic mineralized collagen for bone tissue engineering. Mater Today Bio 2023; 20:100660. [PMID: 37214545 PMCID: PMC10199226 DOI: 10.1016/j.mtbio.2023.100660] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/18/2023] [Accepted: 05/04/2023] [Indexed: 05/24/2023] Open
Abstract
Mineralized collagen (MC) is the basic unit of bone structure and function and is the main component of the extracellular matrix (ECM) in bone tissue. In the biomimetic method, MC with different nanostructures of neo-bone have been constructed. Among these, extra-fibrous MC has been approved by regulatory agencies and applied in clinical practice to play an active role in bone defect repair. However, in the complex microenvironment of bone defects, such as in blood supply disorders and infections, MC is unable to effectively perform its pro-osteogenic activities and needs to be functionalized to include osteogenesis and the enhancement of angiogenesis, anti-infection, and immunomodulation. This article aimed to discuss the preparation and biological performance of MC with different nanostructures in detail, and summarize its functionalization strategy. Then we describe the recent advances in the osteo-inductive properties and multifunctional coordination of MC. Finally, the latest research progress of functionalized biomimetic MC, along with the development challenges and future trends, are discussed. This paper provides a theoretical basis and advanced design philosophy for bone tissue engineering in different bone microenvironments.
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Affiliation(s)
- Xiujie Zhu
- Department of Orthopedics, The Second Hospital of Jilin University, 4110 Yatai Street, Changchun, 130041, PR China
| | - Chenyu Wang
- Department of Plastic and Reconstruct Surgery, The First Hospital of Jilin University, 1 Xinmin Street, Changchun, 130021, PR China
| | - Haotian Bai
- Department of Orthopedics, The Second Hospital of Jilin University, 4110 Yatai Street, Changchun, 130041, PR China
| | - Jiaxin Zhang
- Department of Orthopedics, The Second Hospital of Jilin University, 4110 Yatai Street, Changchun, 130041, PR China
| | - Zhonghan Wang
- Department of Orthopedics, The Second Hospital of Jilin University, 4110 Yatai Street, Changchun, 130041, PR China
| | - Zuhao Li
- Department of Orthopedics, The Second Hospital of Jilin University, 4110 Yatai Street, Changchun, 130041, PR China
| | - Xin Zhao
- Department of Orthopedics, The Second Hospital of Jilin University, 4110 Yatai Street, Changchun, 130041, PR China
| | - Jincheng Wang
- Department of Orthopedics, The Second Hospital of Jilin University, 4110 Yatai Street, Changchun, 130041, PR China
| | - He Liu
- Department of Orthopedics, The Second Hospital of Jilin University, 4110 Yatai Street, Changchun, 130041, PR China
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Ali M, Kwak SH, Lee BT, Choi HJ. Controlled release of vascular endothelial growth factor (VEGF) in alginate and hyaluronic acid (ALG–HA) bead system to promote wound healing in punch-induced wound rat model. JOURNAL OF BIOMATERIALS SCIENCE, POLYMER EDITION 2022; 34:612-631. [PMID: 36218190 DOI: 10.1080/09205063.2022.2135264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
For wound healing, angiogenesis is one of the main therapeutic factors for recovering the injured tissue. To address this issue, a combination of two different polymers, alginate (ALG) and hyaluronic acid (HA) in an 80:20 ratio composition is used to optimize the bead system along with the 5 IU heparin (Hep) by crosslinking into calcium chloride (CaCl2). Encapsulation of Vascular endothelial growth factor (VEGF) in the bead system shows delayed cumulative release in phosphate buffer saline (PBS). For in vitro studies, calf pulmonary artery endothelial (CPAE) cells showed biocompatibility. ALG-HA/VEGF150 improves endothelial Vascular cell adhesion protein 1 (VCAM1) and endothelial nitric oxide synthase (eNOS) expression markers in CPAE cells. In vivo evaluation of the bead system shows around 68% of wound closure 2 weeks post-implantation in 8 mm punch wound models. The treatment group shows decreased epithelial gap between the ends of the wound and neo-epidermal regeneration. ALG-HA/VEGF150 induced significant vascularization, collagen type-1 (Col-1) and fibronectin (FN) development in the in vivo models after 2 weeks of the implantation. Hence, ALG-HA/VEGF150 beads can be used to promote wound healing.
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Affiliation(s)
- Maqsood Ali
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University, Cheonan, South Korea
| | - Si Hyun Kwak
- Department of Plastic and Reconstructive surgery, College of Medicine, Soonchunhyang University, Cheonan, South Korea
| | - Byong-Taek Lee
- Department of Regenerative Medicine, College of Medicine, Soonchunhyang University, Cheonan, South Korea
- Institute of Regenerative Medicine, College of Medicine, Soonchunhyang University, Cheonan, South Korea
| | - Hwan Jun Choi
- Department of Plastic and Reconstructive surgery, College of Medicine, Soonchunhyang University, Cheonan, South Korea
- Institute of Regenerative Medicine, College of Medicine, Soonchunhyang University, Cheonan, South Korea
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3
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Wang J, Xiao L, Wang W, Zhang D, Ma Y, Zhang Y, Wang X. The Auxiliary Role of Heparin in Bone Regeneration and its Application in Bone Substitute Materials. Front Bioeng Biotechnol 2022; 10:837172. [PMID: 35646879 PMCID: PMC9133562 DOI: 10.3389/fbioe.2022.837172] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 04/13/2022] [Indexed: 11/18/2022] Open
Abstract
Bone regeneration in large segmental defects depends on the action of osteoblasts and the ingrowth of new blood vessels. Therefore, it is important to promote the release of osteogenic/angiogenic growth factors. Since the discovery of heparin, its anticoagulant, anti-inflammatory, and anticancer functions have been extensively studied for over a century. Although the application of heparin is widely used in the orthopedic field, its auxiliary effect on bone regeneration is yet to be unveiled. Specifically, approximately one-third of the transforming growth factor (TGF) superfamily is bound to heparin and heparan sulfate, among which TGF-β1, TGF-β2, and bone morphogenetic protein (BMP) are the most common growth factors used. In addition, heparin can also improve the delivery and retention of BMP-2 in vivo promoting the healing of large bone defects at hyper physiological doses. In blood vessel formation, heparin still plays an integral part of fracture healing by cooperating with the platelet-derived growth factor (PDGF). Importantly, since heparin binds to growth factors and release components in nanomaterials, it can significantly facilitate the controlled release and retention of growth factors [such as fibroblast growth factor (FGF), BMP, and PDGF] in vivo. Consequently, the knowledge of scaffolds or delivery systems composed of heparin and different biomaterials (including organic, inorganic, metal, and natural polymers) is vital for material-guided bone regeneration research. This study systematically reviews the structural properties and auxiliary functions of heparin, with an emphasis on bone regeneration and its application in biomaterials under physiological conditions.
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Affiliation(s)
- Jing Wang
- Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Lan Xiao
- Centre for Biomedical Technologies, School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Australia
- Australia−China Centre for Tissue Engineering and Regenerative Medicine, Brisbane, Australia
| | - Weiqun Wang
- Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Dingmei Zhang
- Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Yaping Ma
- Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
| | - Yi Zhang
- Department of Hygiene Toxicology, School of Public Health, Zunyi Medical University, Zunyi, China
| | - Xin Wang
- Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, China
- Centre for Biomedical Technologies, School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Australia
- Australia−China Centre for Tissue Engineering and Regenerative Medicine, Brisbane, Australia
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4
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Vascularization Strategies in Bone Tissue Engineering. Cells 2021; 10:cells10071749. [PMID: 34359919 PMCID: PMC8306064 DOI: 10.3390/cells10071749] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 12/12/2022] Open
Abstract
Bone is a highly vascularized tissue, and its development, maturation, remodeling, and regeneration are dependent on a tight regulation of blood vessel supply. This condition also has to be taken into consideration in the context of the development of artificial tissue substitutes. In classic tissue engineering, bone-forming cells such as primary osteoblasts or mesenchymal stem cells are introduced into suitable scaffolds and implanted in order to treat critical-size bone defects. However, such tissue substitutes are initially avascular. Because of the occurrence of hypoxic conditions, especially in larger tissue substitutes, this leads to the death of the implanted cells. Therefore, it is necessary to devise vascularization strategies aiming at fast and efficient vascularization of implanted artificial tissues. In this review article, we present and discuss the current vascularization strategies in bone tissue engineering. These are based on the use of angiogenic growth factors, the co-implantation of blood vessel forming cells, the ex vivo microfabrication of blood vessels by means of bioprinting, and surgical methods for creating surgically transferable composite tissues.
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Chemotactic and Angiogenic Potential of Mineralized Collagen Scaffolds Functionalized with Naturally Occurring Bioactive Factor Mixtures to Stimulate Bone Regeneration. Int J Mol Sci 2021; 22:ijms22115836. [PMID: 34072505 PMCID: PMC8199046 DOI: 10.3390/ijms22115836] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 05/25/2021] [Accepted: 05/27/2021] [Indexed: 12/20/2022] Open
Abstract
To develop cost-effective and efficient bone substitutes for improved regeneration of bone defects, heparin-modified mineralized collagen scaffolds were functionalized with concentrated, naturally occurring bioactive factor mixtures derived from adipose tissue, platelet-rich plasma and conditioned medium from a hypoxia-treated human bone marrow-derived mesenchymal stem cell line. Besides the analysis of the release kinetics of functionalized scaffolds, the bioactivity of the released bioactive factors was tested with regard to chemotaxis and angiogenic tube formation. Additionally, functionalized scaffolds were seeded with human bone marrow-derived mesenchymal stromal cells (hBM-MSC) and their osteogenic and angiogenic potential was investigated. The release of bioactive factors from the scaffolds was highest within the first 3 days. Bioactivity of the released factors could be confirmed for all bioactive factor mixtures by successful chemoattraction of hBM-MSC in a transwell assay as well as by the formation of prevascular structures in a 2D co-culture system of hBM-MSC and human umbilical vein endothelial cells. The cells seeded directly onto the functionalized scaffolds were able to express osteogenic markers and form tubular networks. In conclusion, heparin-modified mineralized collagen scaffolds could be successfully functionalized with naturally occurring bioactive factor mixtures promoting cell migration and vascularization.
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Native Bovine Hydroxyapatite Powder, Demineralised Bone Matrix Powder, and Purified Bone Collagen Membranes Are Efficient in Repair of Critical-Sized Rat Calvarial Defects. MATERIALS 2020; 13:ma13153393. [PMID: 32751921 PMCID: PMC7436118 DOI: 10.3390/ma13153393] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/27/2020] [Accepted: 07/30/2020] [Indexed: 12/13/2022]
Abstract
Here we evaluated the efficacy of bone repair using various native bovine biomaterials (refined hydroxyapatite (HA), demineralised bone matrix (DBM), and purified bone collagen (COLL)) as compared with commercially available bone mineral and bone autografts. We employed a conventional critical-sized (8 mm diameter) rat calvarial defect model (6-month-old male Sprague–Dawley rats, n = 72 in total). The artificial defect was repaired using HA, DBM, COLL, commercially available bone mineral powder, bone calvarial autograft, or remained unfilled (n = 12 animals per group). Rats were euthanised 4 or 12 weeks postimplantation (n = 6 per time point) with the subsequent examination to assess the extent, volume, area, and mineral density of the repaired tissue by means of microcomputed tomography and hematoxylin and eosin staining. Bovine HA and DBM powder exhibited excellent repair capability similar to the autografts and commercially available bone mineral powder while COLL showed higher bone repair rate. We suggest that HA and DBM powder obtained from bovine bone tissue can be equally applied for the repair of bone defects and demonstrate sufficient potential to be implemented into clinical studies.
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Cramer MC, Badylak SF. Extracellular Matrix-Based Biomaterials and Their Influence Upon Cell Behavior. Ann Biomed Eng 2020; 48:2132-2153. [PMID: 31741227 PMCID: PMC7231673 DOI: 10.1007/s10439-019-02408-9] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 11/08/2019] [Indexed: 01/16/2023]
Abstract
Biologic scaffold materials composed of allogeneic or xenogeneic extracellular matrix (ECM) are commonly used for the repair and remodeling of injured tissue. The clinical outcomes associated with implantation of ECM-based materials range from unacceptable to excellent. The variable clinical results are largely due to differences in the preparation of the material, including characteristics of the source tissue, the method and efficacy of decellularization, and post-decellularization processing steps. The mechanisms by which ECM scaffolds promote constructive tissue remodeling include mechanical support, degradation and release of bioactive molecules, recruitment and differentiation of endogenous stem/progenitor cells, and modulation of the immune response toward an anti-inflammatory phenotype. The methods of ECM preparation and the impact of these methods on the quality of the final product are described herein. Examples of favorable cellular responses of immune and stem cells associated with constructive tissue remodeling of ECM bioscaffolds are described.
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Affiliation(s)
- Madeline C Cramer
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Stephen F Badylak
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA.
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA.
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Zheng S, Li J, Jing X, Gong Z. Parameterized design and fabrication of porous bone scaffolds for the repair of cranial defects. Med Eng Phys 2020; 81:39-46. [PMID: 32513524 DOI: 10.1016/j.medengphy.2020.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 04/23/2020] [Accepted: 05/05/2020] [Indexed: 11/15/2022]
Abstract
In bone tissue engineering, the structure of a scaffold is very important for cell growth and bone regeneration. It is better to make the scaffold resemble the native cancellous bone because natural cancellous bone can promote scaffold revascularization, which then accelerates cell proliferation. This study presents a parameterized design and fabrication method for cranial scaffold construction. A native human cranial sample was first scanned using micro computed tomography (CT), followed by 3D reconstruction, after which the internal structure of the bone trabecula was created. Based on an extracted negative bone trabecula model, the design components of "cavity", "connecting pipe" and "spatial framework" were proposed to describe the scaffold model. Then, by using the parameterized component model and an assembly and deformation algorithm, the bionic scaffold was designed. Its porous distribution, connection, porosity and area size were easily controlled. Finally, a biomaterial scaffold case was fabricated using a gelcasting process, and cell culture testing was performed in vitro to verify the scaffold's biocompatibility. The results show that the scaffold can promote cell growth and that cells accumulate in the form of a mass within three days.
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Affiliation(s)
- Shuxian Zheng
- Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, Tianjin University, Tianjin 300354, China
| | - Jia Li
- Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, Tianjin University, Tianjin 300354, China
| | - Xiubing Jing
- Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, Tianjin University, Tianjin 300354, China.
| | - Zhenhua Gong
- Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, Tianjin University, Tianjin 300354, China
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Bone Tissue Regeneration in the Oral and Maxillofacial Region: A Review on the Application of Stem Cells and New Strategies to Improve Vascularization. Stem Cells Int 2019; 2019:6279721. [PMID: 32082383 PMCID: PMC7012224 DOI: 10.1155/2019/6279721] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 12/13/2019] [Indexed: 02/07/2023] Open
Abstract
Bone tissue engineering techniques are a promising alternative for the use of autologous bone grafts to reconstruct bone defects in the oral and maxillofacial region. However, for successful bone regeneration, adequate vascularization is a prerequisite. This review presents and discusses the application of stem cells and new strategies to improve vascularization, which may lead to feasible clinical applications. Multiple sources of stem cells have been investigated for bone tissue engineering. The stromal vascular fraction (SVF) of human adipose tissue is considered a promising single source for a heterogeneous population of essential cells with, amongst others, osteogenic and angiogenic potential. Enhanced vascularization of tissue-engineered grafts can be achieved by different mechanisms: vascular ingrowth directed from the surrounding host tissue to the implanted graft, vice versa, or concomitantly. Vascular ingrowth into the implanted graft can be enhanced by (i) optimizing the material properties of scaffolds and (ii) their bioactivation by incorporation of growth factors or cell seeding. Vascular ingrowth directed from the implanted graft towards the host tissue can be achieved by incorporating the graft with either (i) preformed microvascular networks or (ii) microvascular fragments (MF). The latter may have stimulating actions on both vascular ingrowth and outgrowth, since they contain angiogenic stem cells like SVF, as well as vascularized matrix fragments. Both adipose tissue-derived SVF and MF are cell sources with clinical feasibility due to their large quantities that can be harvested and applied in a one-step surgical procedure. During the past years, important advancements of stem cell application and vascularization in bone tissue regeneration have been made. The development of engineered in vitro 3D models mimicking the bone defect environment would facilitate new strategies in bone tissue engineering. Successful clinical application requires innovative future investigations enhancing vascularization.
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Hachim D, Whittaker TE, Kim H, Stevens MM. Glycosaminoglycan-based biomaterials for growth factor and cytokine delivery: Making the right choices. J Control Release 2019; 313:131-147. [PMID: 31629041 PMCID: PMC6900262 DOI: 10.1016/j.jconrel.2019.10.018] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/30/2019] [Accepted: 10/01/2019] [Indexed: 12/21/2022]
Abstract
Controlled, localized drug delivery is a long-standing goal of medical research, realization of which could reduce the harmful side-effects of drugs and allow more effective treatment of wounds, cancers, organ damage and other diseases. This is particularly the case for protein "drugs" and other therapeutic biological cargoes, which can be challenging to deliver effectively by conventional systemic administration. However, developing biocompatible materials that can sequester large quantities of protein and release them in a sustained and controlled manner has proven challenging. Glycosaminoglycans (GAGs) represent a promising class of bio-derived materials that possess these key properties and can additionally potentially enhance the biological effects of the delivered protein. They are a diverse group of linear polysaccharides with varied functionalities and suitabilities for different cargoes. However, most investigations so far have focused on a relatively small subset of GAGs - particularly heparin, a readily available, promiscuously-binding GAG. There is emerging evidence that for many applications other GAGs are in fact more suitable for regulated and sustained delivery. In this review, we aim to illuminate the beneficial properties of various GAGs with reference to specific protein cargoes, and to provide guidelines for informed choice of GAGs for therapeutic applications.
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Affiliation(s)
- Daniel Hachim
- Department of Materials, Imperial College London, London, SW7 2AZ, United Kingdom; Department of Bioengineering, Imperial College London, London, SW7 2AZ, United Kingdom; Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Thomas E Whittaker
- Department of Materials, Imperial College London, London, SW7 2AZ, United Kingdom; Department of Bioengineering, Imperial College London, London, SW7 2AZ, United Kingdom; Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Hyemin Kim
- Department of Materials, Imperial College London, London, SW7 2AZ, United Kingdom; Department of Bioengineering, Imperial College London, London, SW7 2AZ, United Kingdom; Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Molly M Stevens
- Department of Materials, Imperial College London, London, SW7 2AZ, United Kingdom; Department of Bioengineering, Imperial College London, London, SW7 2AZ, United Kingdom; Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom.
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Heath DE. A Review of Decellularized Extracellular Matrix Biomaterials for Regenerative Engineering Applications. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2019. [DOI: 10.1007/s40883-018-0080-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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12
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Liu M, Lv Y. Reconstructing Bone with Natural Bone Graft: A Review of In Vivo Studies in Bone Defect Animal Model. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E999. [PMID: 30513940 PMCID: PMC6315600 DOI: 10.3390/nano8120999] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Revised: 11/25/2018] [Accepted: 11/29/2018] [Indexed: 12/28/2022]
Abstract
Bone defects caused by fracture, disease or congenital defect remains a medically important problem to be solved. Bone tissue engineering (BTE) is a promising approach by providing scaffolds to guide and support the treatment of bone defects. However, the autologous bone graft has many defects such as limited sources and long surgical procedures. Therefore, xenograft bone graft is considered as one of the best substitutions and has been effectively used in clinical practice. Due to better preserved natural bone structure, suitable mechanical properties, low immunogenicity, good osteoinductivity and osteoconductivity in natural bone graft, decellularized and demineralized bone matrix (DBM) scaffolds were selected and discussed in the present review. In vivo animal models provide a complex physiological environment for understanding and evaluating material properties and provide important reference data for clinical trials. The purpose of this review is to outline the in vivo bone regeneration and remodeling capabilities of decellularized and DBM scaffolds in bone defect models to better evaluate the potential of these two types of scaffolds in BTE. Taking into account the limitations of the state-of-the-art technology, the results of the animal bone defect model also provide important information for future design of natural bone composite scaffolds.
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Affiliation(s)
- Mengying Liu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, China.
- Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, China.
| | - Yonggang Lv
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Chongqing 400044, China.
- Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing 400044, China.
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Facile incorporation of REDV into porous silk fibroin scaffolds for enhancing vascularization of thick tissues. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 93:96-105. [DOI: 10.1016/j.msec.2018.07.062] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 07/11/2018] [Accepted: 07/23/2018] [Indexed: 12/11/2022]
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Weber D, Knaak S, Hettrich K, Andrulis M, Momburg F, Quade M, Gelinsky M, Schwartz-Albiez R. Influence of Regioselectively Sulfated Cellulose on in Vitro Vascularization of Biomimetic Bone Matrices. Biomacromolecules 2018; 19:4228-4238. [DOI: 10.1021/acs.biomac.8b01004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dominik Weber
- German Cancer Research Center (DKFZ), Clinical Cooperation Unit Applied Tumor Immunology, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Sven Knaak
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Fetscher Strasse 74, 1307 Dresden, Germany
| | - Kay Hettrich
- Fraunhofer Institut für Angewandte Polymerforschung (IAP), Geiselbergstrasse 69, 14476 Potsdam-Golm Germany
| | - Mindaugas Andrulis
- Institute of Pathology, Heidelberg University, Im Neuenheimer Feld 224, 69120 Heidelberg, Germany
| | - Frank Momburg
- German Cancer Research Center (DKFZ), Clinical Cooperation Unit Applied Tumor Immunology, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Mandy Quade
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Fetscher Strasse 74, 1307 Dresden, Germany
| | - Michael Gelinsky
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Faculty of Medicine, Technische Universität Dresden, Fetscher Strasse 74, 1307 Dresden, Germany
| | - Reinhard Schwartz-Albiez
- German Cancer Research Center (DKFZ), Clinical Cooperation Unit Applied Tumor Immunology, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
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Xu WL, Ong HS, Zhu Y, Liu SW, Liu LM, Zhou KH, Xu ZQ, Gao J, Zhang Y, Ye JH, Yang WJ. In Situ Release of VEGF Enhances Osteogenesis in 3D Porous Scaffolds Engineered with Osterix-Modified Adipose-Derived Stem Cells. Tissue Eng Part A 2017; 23:445-457. [PMID: 28107808 DOI: 10.1089/ten.tea.2016.0315] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Adipose-derived stem cells (ADSCs) can differentiate into various cell types and thus have great potential for regenerative medicine. Herein, rat ADSCs were isolated; transduced with lentiviruses expressing Osterix (Osx), a transcriptional factor essential for osteogenesis. Osx overexpression upregulated key osteogenesis-related genes, such as special AT-rich binding protein 2, alkaline phosphatase, osteocalcin, and osteopontin, at both mRNA and protein levels. In addition, mineral nodule formation and alkaline phosphatase activity were enhanced in Osx-overexpressing ADSCs. The expression of dickkopf-related protein 1, a potent Wnt signaling pathway inhibitor, was also increased, whereas that of β-catenin, an intracellular signal transducer in the Wnt pathway, was decreased. β-catenin expression was partially recovered by treatment with lithium chloride, a canonical Wnt pathway activator. The Osx-expressing ADSCs were then combined with 3D gelatin-coated porous poly(ɛ-caprolactone) scaffolds with a unique release prolife of entrapped recombinant human vascular endothelial growth factor (VEGF). The controlled release of VEGF promoted osteogenic differentiation capacity in vitro. When the scaffold-ADSC complexes were transplanted into rat calvarial critical-sized defects, more bone formed on the gelatin/VEGF-coated scaffolds than on other scaffold types. Taken together, the results indicate that, Osx-overexpression promotes ADSCs' osteogenesis both in vitro and in vivo, which could be enhanced by release of VEGF.
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Affiliation(s)
- Wan-Lin Xu
- 1 Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai, China .,2 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology , Shanghai, China .,3 Jiangsu Key Laboratory of Oral Diseases, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University , Nanjing, China
| | - Hui-Shan Ong
- 1 Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai, China .,2 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology , Shanghai, China
| | - Yun Zhu
- 1 Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai, China .,2 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology , Shanghai, China
| | - Sheng-Wen Liu
- 1 Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai, China .,2 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology , Shanghai, China
| | - Li-Min Liu
- 1 Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai, China .,2 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology , Shanghai, China
| | - Kai-Hua Zhou
- 1 Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai, China .,2 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology , Shanghai, China
| | - Zeng-Qi Xu
- 3 Jiangsu Key Laboratory of Oral Diseases, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University , Nanjing, China
| | - Jun Gao
- 4 Key Laboratory of Human Functional Genomics of Jiangsu, Department of Neurobiology, Nanjing Medical University , Nanjing, China
| | - Yan Zhang
- 5 Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology , Shanghai, China
| | - Jin-Hai Ye
- 3 Jiangsu Key Laboratory of Oral Diseases, Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Stomatology, Nanjing Medical University , Nanjing, China
| | - Wen-Jun Yang
- 1 Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University , Shanghai, China .,2 Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology , Shanghai, China
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Heath DE, Cooper SL. The development of polymeric biomaterials inspired by the extracellular matrix. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:1051-1069. [DOI: 10.1080/09205063.2017.1297285] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Daniel E. Heath
- Department of Chemical and Biomolecular Engineering, Particulate Fluids Processing Centre, The University of Melbourne, Parkville, Australia
| | - Stuart L. Cooper
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA
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17
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Li Y, He Q, Hu X, Liu Y, Cheng X, Li X, Deng F. Improved performance of collagen scaffolds crosslinked by Traut’s reagent and Sulfo-SMCC. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:629-647. [PMID: 28277011 DOI: 10.1080/09205063.2017.1291296] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Yiming Li
- Department of Oral Implantology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, P.R. China
| | - Qifen He
- Department of Stomatology, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, P.R. China
| | - Xiucheng Hu
- Department of Oral Implantology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, P.R. China
| | - Yun Liu
- Department of Oral Implantology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, P.R. China
| | - Xiaohui Cheng
- Department of Oral Implantology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, P.R. China
| | - Xiachen Li
- Department of Oral Implantology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, P.R. China
| | - Feilong Deng
- Department of Oral Implantology, Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, P.R. China
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18
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Hu K, Olsen BR. The roles of vascular endothelial growth factor in bone repair and regeneration. Bone 2016; 91:30-8. [PMID: 27353702 PMCID: PMC4996701 DOI: 10.1016/j.bone.2016.06.013] [Citation(s) in RCA: 358] [Impact Index Per Article: 44.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 06/22/2016] [Accepted: 06/23/2016] [Indexed: 02/08/2023]
Abstract
Vascular endothelial growth factor-A (VEGF) is one of the most important growth factors for regulation of vascular development and angiogenesis. Since bone is a highly vascularized organ and angiogenesis plays an important role in osteogenesis, VEGF also influences skeletal development and postnatal bone repair. Compromised bone repair and regeneration in many patients can be attributed to impaired blood supply; thus, modulation of VEGF levels in bones represents a potential strategy for treating compromised bone repair and improving bone regeneration. This review (i) summarizes the roles of VEGF at different stages of bone repair, including the phases of inflammation, endochondral ossification, intramembranous ossification during callus formation and bone remodeling; (ii) discusses different mechanisms underlying the effects of VEGF on osteoblast function, including paracrine, autocrine and intracrine signaling during bone repair; (iii) summarizes the role of VEGF in the bone regenerative procedure, distraction osteogenesis; and (iv) reviews evidence for the effects of VEGF in the context of repair and regeneration techniques involving the use of scaffolds, skeletal stem cells and growth factors.
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Affiliation(s)
- Kai Hu
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, USA.
| | - Bjorn R Olsen
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA, USA.
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19
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Deng M, Chang Z, Hou T, Dong S, Pang H, Li Z, Luo F, Xing J, Yu B, Yi S, Xu J. Sustained release of bioactive protein from a lyophilized tissue-engineered construct promotes the osteogenic potential of mesenchymal stem cells. J Orthop Res 2016; 34:386-94. [PMID: 26267597 DOI: 10.1002/jor.23027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 08/06/2015] [Indexed: 02/06/2023]
Abstract
Tissue-engineered constructs (TECs) seeded with mesenchymal stem cells (MSCs) represent a therapy for large bone defects. However, massive cell death in TECs in the early postimplantation period prompted us to investigate the osteoinductive mechanism of TECs. Previous studies demonstrated that stem cell extracts retained equivalent levels of bioactive proteins and exhibited an osteoinductive nature similar to that of intact cells. These data led us to hypothesize that despite the massive cell death in TECs, devitalized MSC-derived proteins remain on the scaffolds and are released to improve cell function. Here, TECs were prepared using demineralized bone matrix seeded with human umbilical cord Wharton's jelly-derived MSCs (hWJMSCs), and the cells seeded in TECs were devitalized by lyophilizing the TECs. Scanning electron microscopy, BCA protein assays, quantitative cytokine array analysis and immunofluorescent staining indicated that approximately 3 mg/cm(3) of total protein and 49 types of cytokines derived from hWJMSCs were preserved in the lyophilized TECs (LTECs). The sustainable release of total protein and cytokines from LTECs lasted for more than 2 weeks. The released protein improved the osteogenic behavior of and gene expression in MSCs. Furthermore, the lyophilized hWJMSC-derived proteins had immunoregulatory properties similar to those of live MSCs in mixed lymphocyte reactions. Collectively, we present a novel perspective on the osteoinductive mechanism of TECs and introduce LTECs as new systems for delivering multiple cytokines to enhance MSC behavior.
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Affiliation(s)
- Moyuan Deng
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Zhengqi Chang
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, China.,Department of Orthopedics, General Hospital of Jinan Military Commanding Region, Jinan, China
| | - Tianyong Hou
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Shiwu Dong
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, China.,Department of Biomedical Materials Science, College of Biomedical Engineering, Third Military Medical University, Chongqing, China
| | - Hao Pang
- Department of Surgery, Fuzhou Mawei Naval Hospital, Fujian, China
| | - Zhiqiang Li
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Fei Luo
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Junchao Xing
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Bo Yu
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Shaoxuan Yi
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Jianzhong Xu
- National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University, Chongqing, China
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20
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Jin K, Li B, Lou L, Xu Y, Ye X, Yao K, Ye J, Gao C. In vivo vascularization of MSC-loaded porous hydroxyapatite constructs coated with VEGF-functionalized collagen/heparin multilayers. Sci Rep 2016; 6:19871. [PMID: 26794266 PMCID: PMC4726420 DOI: 10.1038/srep19871] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 12/18/2015] [Indexed: 12/18/2022] Open
Abstract
Rapid and adequate vascularization is vital to the long-term success of porous orbital enucleation implants. In this study, porous hydroxyapatite (HA) scaffolds coated with vascular endothelial growth factor (VEGF)-functionalized collagen (COL)/heparin (HEP) multilayers (porosity 75%, pore size 316.8 ± 77.1 μm, VEGF dose 3.39 ng/mm3) were fabricated to enhance vascularization by inducing the differentiation of mesenchymal stem cells (MSCs) to endothelial cells. The in vitro immunofluorescence staining, quantitative real-time polymerase chain reaction (qRT-PCR), and western blotting results demonstrated that the expression of the endothelial differentiation markers CD31, Flk-1, and von Willebrand factor (vWF) was significantly increased in the HA/(COL/HEP)5/VEGF/MSCs group compared with the HA/VEGF/MSCs group. Moreover, the HA/(COL/HEP)5 scaffolds showed a better entrapment of the MSCs and accelerated cell proliferation. The in vivo assays showed that the number of newly formed vessels within the constructs after 28 d was significantly higher in the HA/(COL/HEP)5/VEGF/MSCs group (51.9 ± 6.3/mm2) than in the HA (26.7 ± 2.3/mm2) and HA/VEGF/MSCs (38.2 ± 2.4/mm2) groups. The qRT-PCR and western blotting results demonstrated that the HA/(COL/HEP)5/VEGF/MSCs group also had the highest expression of CD31, Flk-1, and vWF at both the mRNA and protein levels.
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Affiliation(s)
- Kai Jin
- Department of Ophthalmology, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou 310009, China
| | - Bo Li
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lixia Lou
- Department of Ophthalmology, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou 310009, China
| | - Yufeng Xu
- Department of Ophthalmology, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou 310009, China
| | - Xin Ye
- Department of Ophthalmology, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou 310009, China
| | - Ke Yao
- Department of Ophthalmology, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou 310009, China
| | - Juan Ye
- Department of Ophthalmology, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou 310009, China
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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21
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Andrejecsk JW, Chang WG, Pober JS, Saltzman WM. Controlled protein delivery in the generation of microvascular networks. Drug Deliv Transl Res 2015; 5:75-88. [PMID: 25767747 PMCID: PMC4354697 DOI: 10.1007/s13346-012-0122-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Rapid induction and stabilization of new microvascular networks is essential for the proper functioning of engineered tissues. Many efforts to achieve this goal have used proangiogenic proteins-such as vascular endothelial growth factors-to induce the formation of new microvessels. These proteins have demonstrated promise in improving vascularization, but it is also clear that the spatial and temporal presentation of these signals is important for achieving proper vascular function. Delivery systems that present proteins in a localized and sustained manner, can promote the formation and stabilization of microvascular networks by precisely presenting proangiogenic proteins at desired locations, and for specified durations. Further, these systems allow for some control over the sequence of release of multiple proteins, and it has become clear that such coordination is critical for the development of fully functional and mature vascular structures. This review focuses on the actions of proangiogenic proteins and the innovations in controlled release technologies that precisely deliver these to stimulate microvascular network formation and stabilization.
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Affiliation(s)
| | - William G Chang
- Department of Medicine and Section of Nephrology, Yale University School of Medicine, New Haven, CT 06520
| | - Jordan S Pober
- Departments of Immunobiology, Pathology, and Dermatology, Yale University School of Medicine, New Haven, CT 06520
| | - W Mark Saltzman
- Department of Biomedical Engineering, Yale University, New Haven, CT 06511
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22
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Lenze U, Pohlig F, Seitz S, Ern C, Milz S, Docheva D, Schieker M. Influence of osteogenic stimulation and VEGF treatment on in vivo bone formation in hMSC-seeded cancellous bone scaffolds. BMC Musculoskelet Disord 2014; 15:350. [PMID: 25323565 PMCID: PMC4216837 DOI: 10.1186/1471-2474-15-350] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 09/23/2014] [Indexed: 01/24/2023] Open
Abstract
Background Tissue engineering approaches for reconstruction of large bone defects are still technically immature, especially in regard to sufficient blood supply. Therefore, the aim of the present study was to investigate the influence of osteogenic stimulation and treatment with VEGF on new bone formation and neovascularization in hMSC-loaded cancellous bone scaffolds in vivo. Methods Cubic scaffolds were seeded with hMSC and either cultured in stem cell medium or osteogenic stimulation medium. One osteogenically stimulated group was additionally treated with 0.8 μg VEGF prior to subcutaneous implantation in athymic mice. After 2 and 12 weeks in vivo, constructs and selected organs were harvested for histological and molecular analysis. Results Histological analysis revealed similar vascularization of the constructs with and without VEGF treatment and absence of new bone formation in any group. Human DNA was detected in all inoculated scaffolds, but a significant decrease in cells was observed after 2 weeks with no further decrease after 12 weeks in vivo. Conclusion Under the chosen conditions, osteogenic stimulation and treatment with VEGF does not have any influence on the new bone formation and neovascularization in hMSC-seeded cancellous bone scaffolds. Electronic supplementary material The online version of this article (doi:10.1186/1471-2474-15-350) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | | | | | | | | | - Denitsa Docheva
- Laboratory of Experimental Surgery and Regenerative Medicine, Department of Surgery, University of Munich (LMU), Munich, Germany.
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23
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Sengupta D, Waldman SD, Li S. From In Vitro to In Situ Tissue Engineering. Ann Biomed Eng 2014; 42:1537-45. [DOI: 10.1007/s10439-014-1022-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 04/29/2014] [Indexed: 01/09/2023]
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Knaack S, Lode A, Hoyer B, Rösen-Wolff A, Gabrielyan A, Roeder I, Gelinsky M. Heparin modification of a biomimetic bone matrix for controlled release of VEGF. J Biomed Mater Res A 2013; 102:3500-11. [PMID: 24178515 DOI: 10.1002/jbm.a.35020] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 09/12/2013] [Accepted: 10/22/2013] [Indexed: 02/05/2023]
Abstract
Bone regeneration using tissue engineered constructs requires strategies to effectively stimulate vascularization within such a construct that is crucial for its supply and integration with the host tissue. In this work, porous scaffolds of a collagen/hydroxyapatite nanocomposite were modified with heparin to generate biomimetic bone matrices which are able to release angiogenic factors in a controlled manner. Heparin was either integrated during material synthesis (in situ) or added to the scaffolds after their fabrication (post). Both approaches resulted in stable incorporation of heparin into the matrix of mineralized collagen. Investigations of binding and release of the vascular endothelial growth factor (VEGF-A₁₆₅) loaded onto the scaffolds revealed an enhanced binding capacity as well as a sustained and nearly constant delivery of VEGF as result of both heparin modification methods. The release rate could be controlled by varying the quantity of incorporated heparin and the modification method. Although the biological activity of VEGF released after 7 days from the unmodified scaffolds was reduced in comparison to control VEGF, it was maintained after release from post or even enhanced after release from in situ modified scaffolds. In conclusion, the heparin-modified scaffolds of mineralized collagen exhibited favorable growth factor binding and release properties and may be beneficial to stimulate vascularization.
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Affiliation(s)
- Sven Knaack
- Centre for Translational Bone, Joint and Soft Tissue Research, University Hospital Carl Gustav Carus and Medical Faculty of Technische Universität Dresden, Germany
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25
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Renth AN, Detamore MS. Leveraging "raw materials" as building blocks and bioactive signals in regenerative medicine. TISSUE ENGINEERING. PART B, REVIEWS 2012; 18:341-62. [PMID: 22462759 PMCID: PMC3458620 DOI: 10.1089/ten.teb.2012.0080] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 03/28/2012] [Indexed: 01/15/2023]
Abstract
Components found within the extracellular matrix (ECM) have emerged as an essential subset of biomaterials for tissue engineering scaffolds. Collagen, glycosaminoglycans, bioceramics, and ECM-based matrices are the main categories of "raw materials" used in a wide variety of tissue engineering strategies. The advantages of raw materials include their inherent ability to create a microenvironment that contains physical, chemical, and mechanical cues similar to native tissue, which prove unmatched by synthetic biomaterials alone. Moreover, these raw materials provide a head start in the regeneration of tissues by providing building blocks to be bioresorbed and incorporated into the tissue as opposed to being biodegraded into waste products and removed. This article reviews the strategies and applications of employing raw materials as components of tissue engineering constructs. Utilizing raw materials holds the potential to provide both a scaffold and a signal, perhaps even without the addition of exogenous growth factors or cytokines. Raw materials contain endogenous proteins that may also help to improve the translational success of tissue engineering solutions to progress from laboratory bench to clinical therapies. Traditionally, the tissue engineering triad has included cells, signals, and materials. Whether raw materials represent their own new paradigm or are categorized as a bridge between signals and materials, it is clear that they have emerged as a leading strategy in regenerative medicine. The common use of raw materials in commercial products as well as their growing presence in the research community speak to their potential. However, there has heretofore not been a coordinated or organized effort to classify these approaches, and as such we recommend that the use of raw materials be introduced into the collective consciousness of our field as a recognized classification of regenerative medicine strategies.
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Affiliation(s)
- Amanda N. Renth
- Bioengineering Program, University of Kansas, Lawrence, Kansas
| | - Michael S. Detamore
- Bioengineering Program, University of Kansas, Lawrence, Kansas
- Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas
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Yu M, Du F, Ise H, Zhao W, Zhang Y, Yu Y, Yao F, Yang J, Akaike T. Preparation and characterization of a VEGF-Fc fusion protein matrix for enhancing HUVEC growth. Biotechnol Lett 2012; 34:1765-71. [PMID: 22661013 DOI: 10.1007/s10529-012-0959-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Accepted: 05/11/2012] [Indexed: 11/30/2022]
Abstract
To enhance vascularization of hydrophobic implants in vivo, a VEGF-Fc fusion protein consisting of vascular endothelial growth factor (VEGF) fused to the immunoglobulin G Fc domain was prepared as an artificial extracellular matrix (ECM). VEGF-Fc was stably immobilized on a polystyrene plate due to the hydrophobicity of the Fc domain, and significantly enhanced the adhesion of human umbilical vein endothelial cells (HUVECs). Additionally, the use of VEGF-Fc as an ECM markedly promoted the proliferation of HUVECs longer than 72 h and induced the reorganization of actin filaments into larger stress fibers within these cells. The VEGF-Fc fusion protein may be a promising artificial ECM for enhancing endothelial cell growth.
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Affiliation(s)
- Meihua Yu
- School of Chemical Engineering, Tianjin University, Tianjin 300072, China.
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27
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Tan Q, Chen B, Yan X, Lin Y, Xiao Z, Hou X, Dai J. Promotion of diabetic wound healing by collagen scaffold with collagen-binding vascular endothelial growth factor in a diabetic rat model. J Tissue Eng Regen Med 2012; 8:195-201. [PMID: 22570298 DOI: 10.1002/term.1513] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 12/15/2011] [Accepted: 02/04/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Qian Tan
- Department of burns and plastic surgery, Drum Tower Hospital; Nanjing University Medical School; Nanjing China
| | - Bing Chen
- Institute of Genetics and Developmental Biology; Chinese Academy of Sciences; 3 Nanyitiao, Zhongguancun Beijing China
| | - Xin Yan
- Department of burns and plastic surgery, Drum Tower Hospital; Nanjing University Medical School; Nanjing China
| | - Yue Lin
- Department of burns and plastic surgery, Drum Tower Hospital; Nanjing University Medical School; Nanjing China
| | - Zhifeng Xiao
- Institute of Genetics and Developmental Biology; Chinese Academy of Sciences; 3 Nanyitiao, Zhongguancun Beijing China
| | - Xianglin Hou
- Yantai Zhenghai Biotechnology Company, Ltd; Yantai Shangdong China
| | - Jianwu Dai
- Institute of Genetics and Developmental Biology; Chinese Academy of Sciences; 3 Nanyitiao, Zhongguancun Beijing China
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Wu DJ, Liu SL, Hao AH, Zhou DS, Liu JL, Zhao JJ, Cui FZ, Zhou CJ, Wang XW, Ma SZ, Zhang C, Gao CZ. Enhanced repair of segmental bone defects of rats with hVEGF-165 gene-modified endothelial progenitor cells seeded in nanohydroxyapatite/collagen/poly(l-lactic acid) scaffolds. J BIOACT COMPAT POL 2012. [DOI: 10.1177/0883911512439599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A new type of tissue-engineered bone was constructed by seeding hVEGF165 gene-modified endothelial progenitor cells into the nanohydroxyapatite/collagen/poly(L-lactic acid) scaffolds. These were implanted into the segmental femoral defects of rats to explore the promotion of angiogenesis and osteogenesis. The bone marrow of Sprague Dawley rats was cultured and proliferated, and the endothelial progenitor cells were transfected with Ad5–hVEGF165–EGFP. The gene-modified endothelial progenitor cells were seeded into the nanohydroxyapatite/collagen/poly(L-lactic acid) scaffolds; the growth was observed by scanning electron microscope, and the proliferation was evaluated by methyl thiazolyl tetrazolium assay. In vivo, 80 Sprague Dawley rats were divided randomly into four groups; segmental femoral defects (5 mm) were made and allografted: group A with hVEGF165/endothelial progenitor cells–nanohydroxyapatite/collagen/poly(L-lactic acid), group B with mock endothelial progenitor cells–nanohydroxyapatite/collagen/poly(L-lactic acid), group C with endothelial progenitor cells–nanohydroxyapatite/collagen/poly(L-lactic acid), and group D with scaffolds only. Radiographic, histological, and microvessel density tests were performed to evaluate the angiogenic and osteogenic ability. Reverse transcription polymerase chain reaction and western blot results showed that the target gene was expressed by endothelial progenitor cells. The scanning electron microscope findings and methyl thiazolyl tetrazolium assay revealed that endothelial progenitor cells were attached and proliferated within the nanohydroxyapatite/collagen/poly(L-lactic acid) scaffolds. The average radiographic score and capillary density were the highest in group A, and those in groups B and C were higher than that of group D. The histology showed osteogenesis and scaffold degradation in group A, with less in groups B and C and little in group D. The hVEGF165 gene-modified endothelial progenitor cells, which promoted angiogenesis and osteogenesis in bone-defected areas and the hVEGF165/endothelial progenitor cells–nanohydroxyapatite/collagen/poly(L-lactic acid) composites, may have potential application in repair of segmental bone defects.
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Affiliation(s)
- Dong-Jin Wu
- Department of Spinal Surgery, Second Hospital of Shandong University, Jinan, People’s Republic of China
- Department of Orthopedics, Provincial Hospital Affiliated to Shandong University, Jinan, People’s Republic of China
| | - Shu-Ling Liu
- Department of Radiology, the Hospital Affiliated to Shandong University of Traditional Chinese Medicine, Jinan, People’s Republic of China
| | - Ai-Hua Hao
- Department of Radiology, the Hospital Affiliated to Shandong University of Traditional Chinese Medicine, Jinan, People’s Republic of China
| | - Dong-Sheng Zhou
- Department of Orthopedics, Provincial Hospital Affiliated to Shandong University, Jinan, People’s Republic of China
| | - Jun-Li Liu
- Laboratory of Clinical Molecular Biology, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Jing-Jie Zhao
- Laboratory of Clinical Molecular Biology, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Fu-Zhai Cui
- Department of Materials Science and Engineering, Tsinghua University Institute of Regenerative Medicine and Biomimetic Materials, Tsinghua University, Beijing, People’s Republic of China
| | - Cheng-Jun Zhou
- Department of Pathology, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Xiu-Wen Wang
- Department of Spinal Surgery, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Sheng-Zhong Ma
- Department of Spinal Surgery, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Cheng Zhang
- Department of Spinal Surgery, Second Hospital of Shandong University, Jinan, People’s Republic of China
| | - Chun-Zheng Gao
- Department of Spinal Surgery, Second Hospital of Shandong University, Jinan, People’s Republic of China
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Gao J, Liu J, Gao Y, Wang C, Zhao Y, Chen B, Xiao Z, Miao Q, Dai J. A myocardial patch made of collagen membranes loaded with collagen-binding human vascular endothelial growth factor accelerates healing of the injured rabbit heart. Tissue Eng Part A 2011; 17:2739-47. [PMID: 21682575 DOI: 10.1089/ten.tea.2011.0105] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Tissue-engineered myocardial patches could be useful in the repair of myocardial injuries. The aim of the present study was to evaluate a collagen targeting delivery system for myocardial repair. A specific peptide collagen-binding domain (CBD) was fused to human vascular endothelial growth factor (VEGF) to enhance the binding of VEGF to collagen. In this study, collagen membranes loaded with CBD-VEGF, natural VEGF, or phosphate-buffered saline are used as cardiac patches to repair the infarcted myocardium in a rabbit model. CBD-VEGF/collagen group could effectively induce more cells to penetrate into the collagen membrane after 4 weeks and promote more vascularization in infarcted myocardium after 12 weeks compared with the other two control groups. Echocardiography and hemodynamic studies both show cardiac function improvement in the CBD-VEGF/collagen group. These results reveal that implantation of CBD-VEGF collagen membrane patch into the infarcted myocardium could effectively improve left ventricle cardiac function and increase the vascular density.
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Affiliation(s)
- Jian Gao
- Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
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He Q, Zhao Y, Chen B, Xiao Z, Zhang J, Chen L, Chen W, Deng F, Dai J. Improved cellularization and angiogenesis using collagen scaffolds chemically conjugated with vascular endothelial growth factor. Acta Biomater 2011; 7:1084-93. [PMID: 20977949 DOI: 10.1016/j.actbio.2010.10.022] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Revised: 09/27/2010] [Accepted: 10/20/2010] [Indexed: 10/18/2022]
Abstract
Much research has focused on developing vascular endothelial growth factor (VEGF) delivery systems to enhance angiogenesis in wound repair and in tissue engineering. Collagen can be used as a delivery system because of its biocompatibility, but its fast degradation rate and limited affinity with growth factors are disadvantageous for maintaining a sufficient growth factor concentration at injury sites. To enhance VEGF binding to collagen scaffolds and reduce the collagen degradation rate we found a simple way to modify porous collagen scaffolds by chemical addition of sulfhydryl groups, which then allow both cross-linking of the collagen fibers with each other and the immobilization of more VEGF in the scaffold after treatment with sulfo-SMCC. We demonstrated that cross-linking led to a slower degradation rate of the collagen scaffolds, while cellularization was improved by both cross-linking and the presence of VEGF. On the other hand, angiogenesis was increased only moderately by cross-linking, but significantly more by the presence of immobilized VEGF. We conclude that collagen scaffolds chemically conjugated to VEGF by Traut's reagent and sulfo-SMCC is an effective delivery system in wound repair and tissue engineering.
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Zhao M, Zhou J, Li X, Fang T, Dai W, Yin W, Dong J. Repair of bone defect with vascularized tissue engineered bone graft seeded with mesenchymal stem cells in rabbits. Microsurgery 2011; 31:130-7. [PMID: 21268110 DOI: 10.1002/micr.20854] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Revised: 09/25/2010] [Accepted: 09/30/2010] [Indexed: 11/12/2022]
Abstract
This study evaluated the results of repair of the radius defect with a vascularized tissue engineered bone graft composed by implanting mesenchymal stem cells (MSCs) and a vascular bundle into the xenogeneic deproteinized cancellous bone (XDCB) scaffold in a rabbit model. Sixty-four rabbits were used in the study. Among them, four rabbits were used as the MSCs donor. Other 57 rabbits were divided into five groups. In group one (n = 9), a 1.5 cm bone defect was created with no repair. In group two (n = 12), the bone defect was repaired by a XDCB graft alone. In group three (n = 12), the defect was repaired by a XDCB graft that included a vascular bundle. In group four (n = 12), the defect was repaired by a XDCB graft seeded with MSCs. In group five (n = 12), the defect was repaired by a XDCB graft including a vascular bundle and MSCs implantation. The rest three rabbits were used as the normal control for the biomechanical test. The results of X-ray and histology at postoperative intervals (4, 8, and 12 weeks) and biomechanical examinations at 12 weeks showed that combining MSCs and a vascular bundle implantation resulted in promoting vascularization and osteogenesis in the XDCB graft, and improving new bone formation and mechanical property in repair of radius defect with this tissue engineered bone graft. These findings suggested that the vascularized tissue engineered bone graft may be a valuable alternative for repair of large bone defect and deserves further investigations.
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Affiliation(s)
- Mingdong Zhao
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
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Abstract
Functional cardiac tissue was prepared using a modular tissue engineering approach with the goal of creating vascularized tissue. Rat aortic endothelial cells (RAEC) were seeded onto submillimeter-sized modules made of type I bovine collagen supplemented with Matrigel™ (25% v/v) embedded with cardiomyocyte (CM)-enriched neonatal rat heart cells and assembled into a contractile, macroporous, sheet-like construct. Modules (without RAEC) cultured in 10% bovine serum (BS) were more contractile and responsive to external stimulus (lower excitation threshold, higher maximum capture rate, and greater en face fractional area changes) than modules cultured in 10% fetal BS. Incorporating 25% Matrigel in the matrix reduced the excitation threshold and increased the fractional area change relative to collagen only modules (without RAEC). A coculture medium, containing 10% BS, low Mg2+ (0.814mM), and normal glucose (5.5mM), was used to maintain RAEC junction morphology (VE-cadherin) and CM contractility, although the responsiveness of CM was attenuated with RAEC on the modules. Macroporous, sheet-like module constructs were assembled by partially immobilizing a layer of modules in alginate gel until day 8, with or without RAEC. RAEC/CM module sheets were electrically responsive; however, like modules with RAEC this responsiveness was attenuated relative to CM-only sheets. Muscle bundles coexpressing cardiac troponin I and connexin-43 were evident near the perimeter of modules and at intermodule junctions. These results suggest the potential of the modular approach as a platform for building vascularized cardiac tissue.
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Affiliation(s)
- Brendan M Leung
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Canada
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Wang NX, von Recum HA. Affinity-Based Drug Delivery. Macromol Biosci 2010; 11:321-32. [DOI: 10.1002/mabi.201000206] [Citation(s) in RCA: 139] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2010] [Revised: 09/17/2010] [Indexed: 11/06/2022]
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Wang X, Nyman J, Dong X, Leng H, Reyes M. Fundamental Biomechanics in Bone Tissue Engineering. ACTA ACUST UNITED AC 2010. [DOI: 10.2200/s00246ed1v01y200912tis004] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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