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Yuan S, Zheng B, Zheng K, Lai Z, Chen Z, Zhao J, Li S, Zheng X, Wu P, Wang H. Immunoregulation in Skull Defect Repair with a Smart Hydrogel Loaded with Mesoporous Bioactive Glasses. Biomater Res 2024; 28:0074. [PMID: 39247654 PMCID: PMC11378080 DOI: 10.34133/bmr.0074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 08/10/2024] [Indexed: 09/10/2024] Open
Abstract
Skull defect repair is a complex and critical medical challenge, and there is an urgent need to develop multifunctional tissue engineering scaffolds for skull regeneration. The success of bone tissue engineering depends on the construction of scaffolds that can regulate the immune microenvironment of bone regeneration and mimic the liquid crystal and viscoelastic properties of natural bone extracellular matrix. Hence, a smart hydrogel (PEGDA5/AM15/CLC-BMP-4@MBG) with good biocompatibility and the ability to modulate the wound immune microenvironment has been developed for the repair of skull defects. The hydrogel consists of chitin liquid crystal hydrogel (PEGDA5/AM15/CLC) and mesoporous bioactive glasses (MBGs) loaded with bone morphogenetic protein-4 (BMP-4). The liquid crystal hydrogel not only offers the necessary biological support and mechanical properties but also maintains the stability of the liquid crystal state, facilitating adhesion and regeneration of surrounding bone tissue. In addition, BMP-4@MBG intelligently regulates the release rate of BMP-4 in response to changes in wound microenvironment, thus effectively promoting the transformation of macrophages from M1 to M2 macrophages. At the same time, Ca2+ and Si4+ released by MBG degradation and BMP-4 synergically promote bone repair process. The PEGDA5/AM15/CLC-BMP-4@MBG hydrogel shows excellent immunomodulatory and osteogenic properties of bone microenvironment and is a promising scaffold material for bone tissue engineering.
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Affiliation(s)
- Shiguo Yuan
- Department of Orthopaedic, Hainan Traditional Chinese Medicine Hospital, Hainan Medical University, Haikou, 571924, China
- Department of Orthopaedic, Guangdong Provincial Hospital of Chinese Medicine, Hainan Hospital, Guangzhou University of Chinese Medicine, Guangzhou, 510388, China
| | - Boyuan Zheng
- Department of Sports Medicine, The First Affiliated Hospital, Guangdong Provincial Key Laboratory of Speed Capability, The Guangzhou Key Laboratory of Precision Orthopedics and Regenerative Medicine, Jinan University, Guangzhou, 510630, China
| | - Kai Zheng
- Department of Orthopaedic, Hainan Traditional Chinese Medicine Hospital, Hainan Medical University, Haikou, 571924, China
- Department of Orthopaedic, Guangdong Provincial Hospital of Chinese Medicine, Hainan Hospital, Guangzhou University of Chinese Medicine, Guangzhou, 510388, China
| | - Zhiheng Lai
- Department of Orthopaedic, Hainan Traditional Chinese Medicine Hospital, Hainan Medical University, Haikou, 571924, China
- Department of Orthopaedic, Guangdong Provincial Hospital of Chinese Medicine, Hainan Hospital, Guangzhou University of Chinese Medicine, Guangzhou, 510388, China
| | - Zihang Chen
- Department of Psychology, Li Ka Shing Faculty of Medicine, State Key Laboratory of Brain and Cognitive Sciences, The University of Hong Kong, Hong Kong SAR, 999077, China
| | - Jing Zhao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Macau SAR, 519000, China
| | - Shaoping Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Macau, Macau SAR, 519000, China
| | - Xiaofei Zheng
- Department of Sports Medicine, The First Affiliated Hospital, Guangdong Provincial Key Laboratory of Speed Capability, The Guangzhou Key Laboratory of Precision Orthopedics and Regenerative Medicine, Jinan University, Guangzhou, 510630, China
| | - Peng Wu
- Department of Orthopedics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, 200072, China
| | - Huajun Wang
- Department of Sports Medicine, The First Affiliated Hospital, Guangdong Provincial Key Laboratory of Speed Capability, The Guangzhou Key Laboratory of Precision Orthopedics and Regenerative Medicine, Jinan University, Guangzhou, 510630, China
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Zhang Y, He SY, Wang P, Gu J, Jiang Q, Liu M, Wen C. Impacts of permeability and effective diffusivity of porous scaffolds on bone ingrowth: In silico and in vivo analyses. BIOMATERIALS ADVANCES 2024; 161:213901. [PMID: 38776602 DOI: 10.1016/j.bioadv.2024.213901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 05/12/2024] [Accepted: 05/18/2024] [Indexed: 05/25/2024]
Abstract
The permeability and the effective diffusivity of a porous scaffold are critical in the bone-ingrowth process. However, design guidelines for porous structures are still lacking due to inadequate understanding of the complex physiological processes involved. In this study, a model integrating the fundamental biological processes of bone regeneration was constructed to investigate the roles of permeability and effective diffusivity in regulating bone deposition in scaffolds. The in silico analysis results were confirmed in vivo by examining bone depositions in three diamond lattice scaffolds manufactured using selective laser melting. The findings show that the scaffolds with better permeability and effective diffusivity had deeper bone ingrowth and greater bone volume. Compared to permeability, effective diffusivity exhibited greater sensitivity to the orientation of porous structures, and bone ingrowth was deeper in the directions with higher effective diffusivity in spite of identical pore size. A 4.8-fold increase in permeability and a 1.6-fold increase in effective diffusivity by changing the porous structure led to a 1.5-fold increase in newly formed bone. The effective diffusivity of the porous scaffold affects the distribution of osteogenic growth factor, which in turn impacts cell migration and bone deposition through chemotaxis effects. Therefore, effective diffusivity may be a more suitable indicator for porous scaffolds because our study shows changes in this parameter determine changes in bone distribution and bone volume.
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Affiliation(s)
- Yun Zhang
- State Key Laboratory of Digital Medical Engineering, School of Biological Science & Medical Engineering, Southeast University, Nanjing 211189, China
| | - Si-Yuan He
- State Key Laboratory of Digital Medical Engineering, School of Biological Science & Medical Engineering, Southeast University, Nanjing 211189, China.
| | - Peng Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Division of Sports Medicine and Adult Reconstructive Surgery, Department of Orthopedic Surgery, Drum Tower Hospital affiliated to Medical School of Nanjing University, Nanjing, China; Jiangsu Engineering Research Center for 3D Bioprinting, Nanjing, China; Institute of Medical 3D Printing, Nanjing University, Nanjing, China
| | - Jiayu Gu
- Jiangsu Institute of Metrology, Nanjing, China
| | - Qing Jiang
- State Key Laboratory of Pharmaceutical Biotechnology, Division of Sports Medicine and Adult Reconstructive Surgery, Department of Orthopedic Surgery, Drum Tower Hospital affiliated to Medical School of Nanjing University, Nanjing, China; Jiangsu Engineering Research Center for 3D Bioprinting, Nanjing, China; Institute of Medical 3D Printing, Nanjing University, Nanjing, China.
| | - Mengxing Liu
- Shenzhen Mindray Bio-Medical Electronics Co., Ltd, Shenzhen, China; Wuhan Mindray Scientific Co., Ltd, Wuhan, China
| | - Cuie Wen
- School of Aerospace Mechanical and Manufacturing Engineering, RMIT University, Melbourne, Victoria 3001, Australia
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Wang M, Jiang G, Yang H, Jin X. Computational models of bone fracture healing and applications: a review. BIOMED ENG-BIOMED TE 2024; 69:219-239. [PMID: 38235582 DOI: 10.1515/bmt-2023-0088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 12/12/2023] [Indexed: 01/19/2024]
Abstract
Fracture healing is a very complex physiological process involving multiple events at different temporal and spatial scales, such as cell migration and tissue differentiation, in which mechanical stimuli and biochemical factors assume key roles. With the continuous improvement of computer technology in recent years, computer models have provided excellent solutions for studying the complex process of bone healing. These models not only provide profound insights into the mechanisms of fracture healing, but also have important implications for clinical treatment strategies. In this review, we first provide an overview of research in the field of computational models of fracture healing based on CiteSpace software, followed by a summary of recent advances, and a discussion of the limitations of these models and future directions for improvement. Finally, we provide a systematic summary of the application of computational models of fracture healing in three areas: bone tissue engineering, fixator optimization and clinical treatment strategies. The application of computational models of bone healing in clinical treatment is immature, but an inevitable trend, and as these models become more refined, their role in guiding clinical treatment will become more prominent.
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Affiliation(s)
- Monan Wang
- School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang, China
| | - Guodong Jiang
- School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang, China
| | - Haoyu Yang
- School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang, China
| | - Xin Jin
- School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang, China
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Mofazali P, Atapour M, Nakamura M, Sheikholeslam M, Galati M, Saboori A. Surface modification of additive manufactured Ti6Al4V scaffolds with gelatin/alginate- IGF-1 carrier: An effective approach for healing bone defects. Int J Biol Macromol 2024; 265:131125. [PMID: 38527675 DOI: 10.1016/j.ijbiomac.2024.131125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 03/16/2024] [Accepted: 03/22/2024] [Indexed: 03/27/2024]
Abstract
The study investigates the potential of porous scaffolds with Gel/Alg-IGF-1 coatings as a viable candidate for orthopaedic implants. The scaffolds are composed of additively manufactured Ti6Al4V lattices, which were treated in an alkali solution to obtain the anatase and rutile phases. The treated surface exhibited hydrophilicity of <11.5°. A biopolymer carrier containing Insulin-like growth factor 1 was coated on the samples using immersion treatment. This study showed that the surface-modified porous Ti6Al4V scaffolds increased cell viability and proliferation, indicating potential for bone regeneration. The results demonstrate that surface modifications can enhance the osteoconduction and osteoinduction of Ti6Al4V implants, leading to improved bone regeneration and faster recovery. The porous Ti6Al4V scaffolds modified with surface coating of Gel/Alg-IGF-1 exhibited a noteworthy increase in cell viability (from 80.7 to 104.1%viability) and proliferation. These results suggest that the surface modified scaffolds have potential for use in treating bone defects.
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Affiliation(s)
- Parinaz Mofazali
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Masoud Atapour
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Miho Nakamura
- Medicity Research Laboratory, Faculty of Medicine, University of Turku Tykistökatu 6, 20520 Turku, Finland
| | - Mohammadali Sheikholeslam
- Department of Biomaterials, Nanotechnology and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Science, Isfahan, Iran
| | - Manuela Galati
- Integrated Additive Manufacturing Center (IAM), Department of Management and Production Engineering, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129 Turino, Italy
| | - Abdollah Saboori
- Integrated Additive Manufacturing Center (IAM), Department of Management and Production Engineering, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129 Turino, Italy
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Dazzi C, Mehl J, Benamar M, Gerhardt H, Knaus P, Duda GN, Checa S. External mechanical loading overrules cell-cell mechanical communication in sprouting angiogenesis during early bone regeneration. PLoS Comput Biol 2023; 19:e1011647. [PMID: 37956208 PMCID: PMC10681321 DOI: 10.1371/journal.pcbi.1011647] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 11/27/2023] [Accepted: 11/01/2023] [Indexed: 11/15/2023] Open
Abstract
Sprouting angiogenesis plays a key role during bone regeneration. For example, insufficient early revascularization of the injured site can lead to delayed or non-healing. During sprouting, endothelial cells are known to be mechano-sensitive and respond to local mechanical stimuli. Endothelial cells interact and communicate mechanically with their surroundings, such as outer-vascular stromal cells, through cell-induced traction forces. In addition, external physiological loads act at the healing site, resulting in tissue deformations and impacting cellular arrangements. How these two distinct mechanical cues (cell-induced and external) impact angiogenesis and sprout patterning in early bone healing remains however largely unknown. Therefore, the aim of this study was to investigate the relative role of externally applied and cell-induced mechanical signals in driving sprout patterning at the onset of bone healing. To investigate cellular self-organisation in early bone healing, an in silico model accounting for the mechano-regulation of sprouting angiogenesis and stromal cell organization was developed. Computer model predictions were compared to in vivo experiments of a mouse osteotomy model stabilized with a rigid or a semirigid fixation system. We found that the magnitude and orientation of principal strains within the healing region can explain experimentally observed sprout patterning, under both fixation conditions. Furthermore, upon simulating the selective inhibition of either cell-induced or externally applied mechanical cues, external mechanical signals appear to overrule the mechanical communication acting on a cell-cell interaction level. Such findings illustrate the relevance of external mechanical signals over the local cell-mediated mechanical cues and could be used in the design of fracture treatment strategies for bone regeneration.
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Affiliation(s)
- Chiara Dazzi
- Julius Wolff Institute for Biomechanics and Musculoskeletal Regeneration, Berlin Institute of Health at Charité–Universitätsmedizin Berlin, Berlin, Germany
| | - Julia Mehl
- Julius Wolff Institute for Biomechanics and Musculoskeletal Regeneration, Berlin Institute of Health at Charité–Universitätsmedizin Berlin, Berlin, Germany
| | - Mounir Benamar
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Holger Gerhardt
- Max Delbrück Center for Molecular Medicine, Berlin, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Berlin, Berlin, Germany
- Berlin Institute of Health at Charité–Universitätsmedizin Berlin, Berlin, Germany
| | - Petra Knaus
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Georg N. Duda
- Julius Wolff Institute for Biomechanics and Musculoskeletal Regeneration, Berlin Institute of Health at Charité–Universitätsmedizin Berlin, Berlin, Germany
- Berlin Institute of Health Centre for Regenerative Therapies (BCRT), Berlin Institute of Health at Charité–Universitätsmedizin Berlin, Berlin, Germany
| | - Sara Checa
- Julius Wolff Institute for Biomechanics and Musculoskeletal Regeneration, Berlin Institute of Health at Charité–Universitätsmedizin Berlin, Berlin, Germany
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Tan Y, Fan S, Wu X, Liu M, Dai T, Liu C, Ni S, Wang J, Yuan X, Zhao H, Weng Y. Fabrication of a three-dimensional printed gelatin/sodium alginate/nano-attapulgite composite polymer scaffold loaded with leonurine hydrochloride and its effects on osteogenesis and vascularization. Int J Biol Macromol 2023; 249:126028. [PMID: 37506787 DOI: 10.1016/j.ijbiomac.2023.126028] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 07/24/2023] [Accepted: 07/25/2023] [Indexed: 07/30/2023]
Abstract
Bone tissue engineering scaffolds have made significant progress in treating bone defects in recent decades. However, the lack of a vascular network within the scaffold limits bone formation after implantation in vivo. Recent research suggests that leonurine hydrochloride (LH) can promote healing in full-thickness cutaneous wounds by increasing vessel formation and collagen deposition. Gelatin and Sodium Alginate are both polymers. ATP is a magnesium silicate chain mineral. In this study, a Gelatin/Sodium Alginate/Nano-Attapulgite composite hydrogel was used as the base material first, and the Gelatin/Sodium Alginate/Nano-Attapulgite composite polymer scaffold loaded with LH was then created using 3D printing technology. Finally, LH was grafted onto the base material by an amide reaction to construct a scaffold loaded with LH to achieve long-term LH release. When compared to pure polymer scaffolds, in vitro results showed that LH-loaded scaffolds promoted the differentiation of BMSCs into osteoblasts, as evidenced by increased expression of osteogenic key genes. The results of in vivo tissue staining revealed that the drug-loaded scaffold promoted both angiogenesis and bone formation. Collectively, these findings suggest that LH-loaded Gelatin/Sodium Alginate/Nano-Attapulgite composite hydrogel scaffolds are a potential therapeutic strategy and can assist bone regeneration.
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Affiliation(s)
- Yadong Tan
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China
| | - Shijie Fan
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China
| | - Xiaoyu Wu
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China
| | - Menggege Liu
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China
| | - Ting Dai
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China
| | - Chun Liu
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China
| | - Su Ni
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China
| | - Jiafeng Wang
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China
| | - Xiuchen Yuan
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China
| | - Hongbin Zhao
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China.
| | - Yiping Weng
- Department of Orthopedics, The Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou 213164, China; Changzhou Medical Center, Nanjing Medical University, Changzhou 213164, China.
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Pei B, Hu M, Wu X, Lu D, Zhang S, Zhang L, Wu S. Investigations into the effects of scaffold microstructure on slow-release system with bioactive factors for bone repair. Front Bioeng Biotechnol 2023; 11:1230682. [PMID: 37781533 PMCID: PMC10537235 DOI: 10.3389/fbioe.2023.1230682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 09/01/2023] [Indexed: 10/03/2023] Open
Abstract
In recent years, bone tissue engineering (BTE) has played an essential role in the repair of bone tissue defects. Although bioactive factors as one component of BTE have great potential to effectively promote cell differentiation and bone regeneration, they are usually not used alone due to their short effective half-lives, high concentrations, etc. The release rate of bioactive factors could be controlled by loading them into scaffolds, and the scaffold microstructure has been shown to significantly influence release rates of bioactive factors. Therefore, this review attempted to investigate how the scaffold microstructure affected the release rate of bioactive factors, in which the variables included pore size, pore shape and porosity. The loading nature and the releasing mechanism of bioactive factors were also summarized. The main conclusions were achieved as follows: i) The pore shapes in the scaffold may have had no apparent effect on the release of bioactive factors but significantly affected mechanical properties of the scaffolds; ii) The pore size of about 400 μm in the scaffold may be more conducive to controlling the release of bioactive factors to promote bone formation; iii) The porosity of scaffolds may be positively correlated with the release rate, and the porosity of 70%-80% may be better to control the release rate. This review indicates that a slow-release system with proper scaffold microstructure control could be a tremendous inspiration for developing new treatment strategies for bone disease. It is anticipated to eventually be developed into clinical applications to tackle treatment-related issues effectively.
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Affiliation(s)
- Baoqing Pei
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Mengyuan Hu
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Xueqing Wu
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Da Lu
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Shijia Zhang
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Le Zhang
- Beijing Key Laboratory for Design and Evaluation Technology of Advanced Implantable and Interventional Medical Devices, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Shuqin Wu
- School of Big Data and Information, Shanxi College of Technology, Taiyuan, Shanxi, China
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Mahapatra C, Kumar P, Paul MK, Kumar A. Angiogenic stimulation strategies in bone tissue regeneration. Tissue Cell 2022; 79:101908. [DOI: 10.1016/j.tice.2022.101908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/24/2022] [Accepted: 08/22/2022] [Indexed: 11/28/2022]
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Wang S, Zhao S, Yu J, Gu Z, Zhang Y. Advances in Translational 3D Printing for Cartilage, Bone, and Osteochondral Tissue Engineering. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2201869. [PMID: 35713246 DOI: 10.1002/smll.202201869] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/12/2022] [Indexed: 06/15/2023]
Abstract
The regeneration of 3D tissue constructs with clinically relevant sizes, structures, and hierarchical organizations for translational tissue engineering remains challenging. 3D printing, an additive manufacturing technique, has revolutionized the field of tissue engineering by fabricating biomimetic tissue constructs with precisely controlled composition, spatial distribution, and architecture that can replicate both biological and functional native tissues. Therefore, 3D printing is gaining increasing attention as a viable option to advance personalized therapy for various diseases by regenerating the desired tissues. This review outlines the recently developed 3D printing techniques for clinical translation and specifically summarizes the applications of these approaches for the regeneration of cartilage, bone, and osteochondral tissues. The current challenges and future perspectives of 3D printing technology are also discussed.
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Affiliation(s)
- Shenqiang Wang
- Zhejiang Provincial Key Laboratory for Advanced Drug Delivery Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Sheng Zhao
- Zhejiang Provincial Key Laboratory for Advanced Drug Delivery Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jicheng Yu
- Zhejiang Provincial Key Laboratory for Advanced Drug Delivery Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- Liangzhu Laboratory, Zhejiang University Medical Center, Hangzhou, 311121, China
| | - Zhen Gu
- Zhejiang Provincial Key Laboratory for Advanced Drug Delivery Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- Liangzhu Laboratory, Zhejiang University Medical Center, Hangzhou, 311121, China
- Department of General Surgery, Sir Run Run Hospital, School of Medicine, Zhejiang University, Hangzhou, 310016, China
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
- Jinhua Institute of Zhejiang University, Jinhua, 321299, China
| | - Yuqi Zhang
- Zhejiang Provincial Key Laboratory for Advanced Drug Delivery Systems, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
- Department of Burns and Wound Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009, China
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10
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Mao R, Du D, Zhu X, Li W. Velvet antler polypeptide combined with calcium phosphate coating to protect peripheral nerve cells from oxidative stress. J Mol Histol 2022; 53:915-923. [PMID: 36036305 DOI: 10.1007/s10735-022-10099-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 08/16/2022] [Indexed: 11/26/2022]
Abstract
Functionalizing biomaterial substrates with biological signals shows promise in regulating cell behaviors through mimicking cellular microenvironment. Calcium phosphate (CaP) coating is an excellent carrier for immobilizing biological molecules due to its non-toxicity, good biocompatibility, biodegradability, and favorable affinity to plenty of molecules. In this study, we reported the adhesion, the viability and proliferation behaviors after oxidative stress injury of Schwann cells RSC96 on CaP immobilized with the Velvet Antler Peptide (VAP) isolated from velvet antler through coprecipitation process in modified Dulbecco's phosphate-buffered saline (DPBS) containing VAP. This approach provided well retention of functional molecules up to 28 days, and supported the adhesion and proliferation of RSC96 after oxidative stress injury without cytotoxicity. The simple and reproducible method of coprecipitation suggests that CaP is an ideal carrier to functionalize materials with biological molecules for peripheral nerve repair-related applications.
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Affiliation(s)
- Renqun Mao
- Department of Hand-Foot Microsurgery, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, 518052, People's Republic of China
| | - Dalian Du
- Department of Gynaecology, Shenzhen Nanshan District Maternal and Chlid Health Care Hospital, Shenzhen, 518000, People's Republic of China
| | - Xiaodi Zhu
- Department of Hand-Foot Microsurgery, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, 518052, People's Republic of China
| | - Wenqing Li
- Department of Hand-Foot Microsurgery, Huazhong University of Science and Technology Union Shenzhen Hospital, Shenzhen, 518052, People's Republic of China.
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Perier-Metz C, Cipitria A, Hutmacher DW, Duda GN, Checa S. An in silico model predicts the impact of scaffold design in large bone defect regeneration. Acta Biomater 2022; 145:329-341. [PMID: 35417799 DOI: 10.1016/j.actbio.2022.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 03/16/2022] [Accepted: 04/06/2022] [Indexed: 12/27/2022]
Abstract
Large bone defects represent a clinical challenge for which the implantation of scaffolds appears as a promising strategy. However, their use in clinical routine is limited, in part due to a lack of understanding of how scaffolds should be designed to support regeneration. Here, we use the power of computer modeling to investigate mechano-biological principles behind scaffold-guided bone regeneration and the influence of scaffold design on the regeneration process. Computer model predictions are compared to experimental data of large bone defect regeneration in sheep. We identified two main key players in scaffold-guided regeneration: (1) the scaffold surface guidance of cellular migration and tissue formation processes and (2) the stimulation of progenitor cell activity by the scaffold material composition. In addition, lower scaffold surface-area-to-volume ratio was found to be beneficial for bone regeneration due to enhanced cellular migration. To a lesser extent, a reduced scaffold Young's modulus favored bone formation. STATEMENT OF SIGNIFICANCE: 3D-printed scaffolds offer promising treatment strategies for large bone defects but their broader clinical use requires a more thorough understanding of their interaction with the bone regeneration process. The predictions of our in silico model compared to two experimental set-ups highlighted the importance of (1) the scaffold surface guidance of cellular migration and tissue formation processes and (2) the scaffold material stimulation of progenitor cell activity. In addition, the model was used to investigate the effect on the bone regeneration process of (1) the scaffold surface-area-to-volume ratio, with lower ratios favoring more bone growth, and (2) the scaffold material properties, with stiffer scaffold materials yielding a lower bone growth.
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Affiliation(s)
- Camille Perier-Metz
- Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Julius Wolff Institute, Augustenburger Platz 1, Berlin 13353, Germany; MINES ParisTech - PSL Research University, 60 Boulevard Saint-Michel, Paris 75272, France; Berlin-Brandenburg School for Regenerative Therapies, Augustenburger Platz 1, Berlin 13353, Germany
| | - Amaia Cipitria
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, Potsdam 14476, Germany; Biodonostia Health Research Institute, Pº Dr. Beguiristain s/n, San Sebastian 20014, Spain; IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, Bilbao 48009, Spain
| | - Dietmar W Hutmacher
- Center in Regenerative Medicine, Queensland University of Technology (QUT), 60 Musk Avenue, Brisbane, Kelvin Grove QLD 4059, Australia; Science and Engineering Faculty (SEF), School of Mechanical, Medical and Process Engineering (MMPE), QUT, Brisbane QLD 4000, Australia; ARC Training Center for Multiscale 3D Imaging, Modeling, and Manufacturing, Queensland University of Technology, Brisbane QLD 4059, Australia; Center for Biomedical Technologies, Queensland University of Technology, Brisbane QLD 4059, Australia
| | - Georg N Duda
- Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Julius Wolff Institute, Augustenburger Platz 1, Berlin 13353, Germany; Berlin-Brandenburg School for Regenerative Therapies, Augustenburger Platz 1, Berlin 13353, Germany; BIH Center for Regenerative Therapies at Charité, Universitätsmedizin Berlin, Augustenburger Platz 1, Berlin 13353, Germany
| | - Sara Checa
- Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Julius Wolff Institute, Augustenburger Platz 1, Berlin 13353, Germany; Berlin-Brandenburg School for Regenerative Therapies, Augustenburger Platz 1, Berlin 13353, Germany.
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12
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Huang J, Han Q, Cai M, Zhu J, Li L, Yu L, Wang Z, Fan G, Zhu Y, Lu J, Zhou G. Effect of Angiogenesis in Bone Tissue Engineering. Ann Biomed Eng 2022; 50:898-913. [PMID: 35525871 DOI: 10.1007/s10439-022-02970-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 04/17/2022] [Indexed: 12/20/2022]
Abstract
The reconstruction of large skeletal defects is still a tricky challenge in orthopedics. The newly formed bone tissue migrates sluggishly from the periphery to the center of the scaffold due to the restrictions of exchange of oxygen and nutrition impotent cells osteogenic differentiation. Angiogenesis plays an important role in bone reconstruction and more and more studies on angiogenesis in bone tissue engineering had been published. Promising advances of angiogenesis in bone tissue engineering by scaffold designs, angiogenic factor delivery, in vivo prevascularization and in vitro prevascularization are discussed in detail. Among all the angiogenesis mode, angiogenic factor delivery is the common methods of angiogenesis in bone tissue engineering and possible research directions in the future.
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Affiliation(s)
- Jianhao Huang
- Department of Orthopedics, Jinling Hospital, The First School of Clinical Medicine, Southern Medical University, Nanjing, 210002, People's Republic of China
| | - Qixiu Han
- Department of Orthopedics, Jinling Hospital, Nanjing Medical University, Nanjing, 210002, People's Republic of China
| | - Meng Cai
- Department of Orthopedics, Jinling Hospital, School of Medicine, Southeast University, Nanjing, 210002, People's Republic of China
| | - Jie Zhu
- Department of Orthopedics, Jinling Hospital, Nanjing Medical University, Nanjing, 210002, People's Republic of China
| | - Lan Li
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Sports Medicine and Adult Reconstructive Surgery, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210008, People's Republic of China
| | - Lingfeng Yu
- Department of Orthopedics, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, 210002, People's Republic of China
| | - Zhen Wang
- Department of Orthopedics, Jinling Hospital, Nanjing Medical University, Nanjing, 210002, People's Republic of China
| | - Gentao Fan
- Department of Orthopedics, Nanjing Jinling Hospital, 305 Zhongshan East Road, Nanjing, 210002, People's Republic of China
| | - Yan Zhu
- Department of Orthopedics, Nanjing Jinling Hospital, 305 Zhongshan East Road, Nanjing, 210002, People's Republic of China
| | - Jingwei Lu
- Department of Orthopedics, Jinling Hospital, Nanjing Medical University, Nanjing, 210002, People's Republic of China. .,Department of Orthopedics, Nanjing Jinling Hospital, 305 Zhongshan East Road, Nanjing, 210002, People's Republic of China.
| | - Guangxin Zhou
- Department of Orthopedics, Jinling Hospital, The First School of Clinical Medicine, Southern Medical University, Nanjing, 210002, People's Republic of China. .,Department of Orthopedics, Jinling Hospital, School of Medicine, Nanjing University, Nanjing, 210002, People's Republic of China. .,Department of Orthopedics, Nanjing Jinling Hospital, 305 Zhongshan East Road, Nanjing, 210002, People's Republic of China. .,The First School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, People's Republic of China.
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13
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Zhang Y, Wang P, Jin J, Li L, He SY, Zhou P, Jiang Q, Wen C. In silico and in vivo studies of the effect of surface curvature on the osteoconduction of porous scaffolds. Biotechnol Bioeng 2021; 119:591-604. [PMID: 34723387 DOI: 10.1002/bit.27976] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 10/14/2021] [Accepted: 10/25/2021] [Indexed: 01/08/2023]
Abstract
Recent evidence shows that the curvature of porous scaffold plays a significant role in guiding tissue regeneration. However, the underlying mechanism remains controversial to date. In this study, we developed an in silico model to simulate the effect of surface curvature on the osteoconduction of scaffold implants, which comprises the primary aspects of bone regeneration. Selective laser melting was used to manufacture a titanium scaffold with channels representative of different strut curvatures for in vivo assessment. The titanium scaffold was implanted in the femur condyles of rabbits to validate the mathematical model. Simulation results suggest that the curvature affected the distribution of growth factors and subsequently induced the migration of osteoblast lineage cells and bone deposition to the locations with higher curvature. The predictions of the mathematical model are in good agreement with the in vivo assessment results, in which newly formed bone first appeared adjacent to the vertices of the major axes in elliptical channels. The mechanism of curvature-guided osteoconduction may provide a guide for the design optimization of scaffold implants to achieve enhanced bone ingrowth.
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Affiliation(s)
- Yun Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, China
| | - Peng Wang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, China.,Department of Sports Medicine and Adult Reconstructive Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Jiyong Jin
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, China
| | - Lan Li
- Department of Sports Medicine and Adult Reconstructive Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Si-Yuan He
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, China
| | - Ping Zhou
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, China
| | - Qing Jiang
- Department of Sports Medicine and Adult Reconstructive Surgery, State Key Laboratory of Pharmaceutical Biotechnology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Cuie Wen
- School of Aerospace Mechanical and Manufacturing Engineering, RMIT University, Melbourne, Victoria, Australia
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14
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Faweya O, Desai PS, Higgs Iii CF. Towards an agent-based model to simulate osseointegration in powder-bed 3D printed implant-like structures. J Mech Behav Biomed Mater 2021; 126:104915. [PMID: 34891066 DOI: 10.1016/j.jmbbm.2021.104915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 08/24/2021] [Accepted: 10/17/2021] [Indexed: 11/16/2022]
Abstract
The orthopedic industry is still searching for an efficient way to replace bone loss due to surgical procedures such as arthroplasty and limb-sparing surgery. Additive manufacturing (AM) presents an opportunity to manufacture affordable patient-specific implants. Optimization of the implant-bone interface to maximize osseointegration (bone ingrowth) has not been appropriately addressed. Mechanobiological models, suited to predict mechanical adaptation of bone, cannot be used to predict osseointegration inside implants as the implant is not exposed to any mechanical loading until it is fully accepted by the host body. Biological models relying on partial differential equations based on continuum approximation are not well-suited to predict the discrete phenomenon of osseointegration. This study proposes an agent-based modeling (ABM) approach for representing the osseointegration process for orthopedic implants produced by powder-bed additive manufacturing processes. Agent-Based Modeling (ABM) is a cellular automata based discrete computing technique that uses rule-based mathematics derived from experimental studies to simulate evolutionary phenomena. In this paper, osseointegration inside a hexagonal closed packing of AM powder particles is modeled using ABM. Cellular agents such as pre-osteoblasts and osteoblasts are realistically modeled as cubic cells. The proposed model underpredicts osseointegration at early stages but predicts osseointegration at around 21 days with sufficient accuracy when compared to the in vitro test conducted by Xue et al. in 2007.
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Affiliation(s)
- Olufunto Faweya
- Rice University, 6100 Main St, Houston, TX 77005, United States of America
| | - Prathamesh S Desai
- Rice University, 6100 Main St, Houston, TX 77005, United States of America.
| | - C Fred Higgs Iii
- Rice University, 6100 Main St, Houston, TX 77005, United States of America.
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15
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Li J, Zhao C, Liu C, Wang Z, Ling Z, Lin B, Tan B, Zhou L, Chen Y, Liu D, Zou X, Liu W. Cobalt-doped bioceramic scaffolds fabricated by 3D printing show enhanced osteogenic and angiogenic properties for bone repair. Biomed Eng Online 2021; 20:70. [PMID: 34303371 PMCID: PMC8306242 DOI: 10.1186/s12938-021-00907-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/15/2021] [Indexed: 11/22/2022] Open
Abstract
Background The bone regeneration of artificial bone grafts is still in need of a breakthrough to improve the processes of bone defect repair. Artificial bone grafts should be modified to enable angiogenesis and thus improve osteogenesis. We have previously revealed that crystalline Ca10Li(PO4)7 (CLP) possesses higher compressive strength and better biocompatibility than that of pure beta-tricalcium phosphate (β-TCP). In this work, we explored the possibility of cobalt (Co), known for mimicking hypoxia, doped into CLP to promote osteogenesis and angiogenesis. Methods We designed and manufactured porous scaffolds by doping CLP with various concentrations of Co (0, 0.1, 0.25, 0.5, and 1 mol%) and using 3D printing techniques. The crystal phase, surface morphology, compressive strength, in vitro degradation, and mineralization properties of Co-doped and -undoped CLP scaffolds were investigated. Next, we investigated the biocompatibility and effects of Co-doped and -undoped samples on osteogenic and angiogenic properties in vitro and on bone regeneration in rat cranium defects. Results With increasing Co-doping level, the compressive strength of Co-doped CLP scaffolds decreased in comparison with that of undoped CLP scaffolds, especially when the Co-doping concentration increased to 1 mol%. Co-doped CLP scaffolds possessed excellent degradation properties compared with those of undoped CLP scaffolds. The (0.1, 0.25, 0.5 mol%) Co-doped CLP scaffolds had mineralization properties similar to those of undoped CLP scaffolds, whereas the 1 mol% Co-doped CLP scaffolds shown no mineralization changes. Furthermore, compared with undoped scaffolds, Co-doped CLP scaffolds possessed excellent biocompatibility and prominent osteogenic and angiogenic properties in vitro, notably when the doping concentration was 0.25 mol%. After 8 weeks of implantation, 0.25 mol% Co-doped scaffolds had markedly enhanced bone regeneration at the defect site compared with that of the undoped scaffold. Conclusion In summary, CLP doped with 0.25 mol% Co2+ ions is a prospective method to enhance osteogenic and angiogenic properties, thus promoting bone regeneration in bone defect repair. Supplementary Information The online version contains supplementary material available at 10.1186/s12938-021-00907-2.
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Affiliation(s)
- Jungang Li
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Chaoqian Zhao
- Key Laboratory of Optoelectronic Materials Chemical and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, China
| | - Chun Liu
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Zhenyu Wang
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Zeming Ling
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Bin Lin
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Bizhi Tan
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Linquan Zhou
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China
| | - Yan Chen
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Delong Liu
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China
| | - Xuenong Zou
- Guangdong Provincial Key Laboratory of Orthopaedics and Traumatology, Department of Spine Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510080, China.
| | - Wenge Liu
- Department of Orthopaedics, Fujian Medical University Union Hospital, Fuzhou, 350001, China.
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16
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Quexada-Rodríguez D, Márquez-Flórez K, Cerrolaza M, Duque-Daza C, Trabelsi O, Velasco MA, Ramtani S, Ho-Ba-Tho MC, Garzón-Alvarado D. A simple and effective 1D-element discrete-based method for computational bone remodeling. Comput Methods Biomech Biomed Engin 2021; 25:176-192. [PMID: 34190673 DOI: 10.1080/10255842.2021.1943370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In-silico models applied to bone remodeling are widely used to investigate bone mechanics, bone diseases, bone-implant interactions, and also the effect of treatments of bone pathologies. This article proposes a new methodology to solve the bone remodeling problem using one-dimensional (1D) elements to discretize trabecular structures more efficiently for 2D and 3D domains. An Euler integration scheme is coupled with the momentum equations to obtain the evolution of material density at each step. For the simulations, the equations were solved by using the finite element method, and two benchmark tests were solved varying mesh parameters. Proximal femur and calcaneus bone were selected as study cases given the vast research available on the topology of these bones, and compared with the anatomical features of trabecular bone reported in the literature. The presented methodology has proven to be efficient in optimizing topologies of lattice structures; It can predict the trend of formation patterns of the main trabecular groups from two different cancellous bones (femur and calcaneus) using domains set up by discrete elements as a starting point. Preliminary results confirm that the proposed approach is suitable and useful in bone remodeling problems leading to a considerable computational cost reduction. Characteristics similar to those encountered in topological optimization algorithms were identified in the benchmark tests as well, showing the viability of the proposed approach in other applications such as bio-inspired design.
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Affiliation(s)
| | - Kalenia Márquez-Flórez
- Universidad Nacional de Colombia, Bogotá, Colombia.,Aix-Marseille Univ, CNRS, ISM, Marseille, France
| | - Miguel Cerrolaza
- Universitat Internacional de Catalunya, Barcelona, Spain.,Universitat Internacional de Valencia, Valencia, Spain
| | | | - Olfa Trabelsi
- Université de Technologie de Compiégne, Compiégne, France
| | - M A Velasco
- Universidad Nacional de Colombia, Bogotá, Colombia
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17
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UV Light-Generated Superhydrophilicity of a Titanium Surface Enhances the Transfer, Diffusion and Adsorption of Osteogenic Factors from a Collagen Sponge. Int J Mol Sci 2021; 22:ijms22136811. [PMID: 34202795 PMCID: PMC8268603 DOI: 10.3390/ijms22136811] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 06/14/2021] [Accepted: 06/21/2021] [Indexed: 02/07/2023] Open
Abstract
It is a significant challenge for a titanium implant, which is a bio-inert material, to recruit osteogenic factors, such as osteoblasts, proteins and blood effectively when these are contained in a biomaterial. The objective of this study was to examine the effect of ultraviolet (UV)-treatment of titanium on surface wettability and the recruitment of osteogenic factors when they are contained in an atelocollagen sponge. UV treatment of a dental implant made of commercially pure titanium was performed with UV-light for 12 min immediately prior to the experiments. Superhydrophilicity on dental implant surfaces was generated with UV-treatment. The collagen sponge containing blood, osteoblasts, or albumin was directly placed on the dental implant. Untreated implants absorbed only a little blood from the collagen sponge, while the UV-treated implants absorbed blood rapidly and allowed it to spread widely, almost over the entire implant surface. Blood coverage was 3.5 times greater for the UV-treated implants (p < 0.001). Only 6% of the osteoblasts transferred from the collagen sponge to the untreated implants, whereas 16% of the osteoblasts transferred to the UV-treated implants (p < 0.001). In addition, a weight ratio between transferred albumin on the implant and measured albumin adsorbed on the implant was 17.3% in untreated implants and 38.5% in UV-treated implants (p < 0.05). These results indicated that UV treatment converts a titanium surface into a superhydrophilic and bio-active material, which could recruite osteogenic factors even when they were contained in a collagen sponge. The transfer and subsequent diffusion and adsorption efficacy of UV-treated titanium surfaces could be useful for bone formation when titanium surfaces and osteogenic factors are intervened with a biomaterial.
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18
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Lu T, He F, Ye J. Physicochemical Properties, In Vitro Degradation, and Biocompatibility of Calcium Phosphate Cement Incorporating Poly(lactic- co-glycolic acid) Particles with Different Morphologies: A Comparative Study. ACS OMEGA 2021; 6:8322-8331. [PMID: 33817492 PMCID: PMC8015133 DOI: 10.1021/acsomega.1c00031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 03/01/2021] [Indexed: 05/13/2023]
Abstract
Calcium phosphate cement (CPC) is one of the most promising synthetic biomaterials for bone defect repair, but its low degradation rate and the lack of macropores restrict its repair effect. Poly(lactic-co-glycolic acid) (PLGA) is commonly used as an in situ pore forming agent in CPC, and the morphology of PLGA would affect the properties of CPC. In this study, three kinds of PLGA particles with different morphologies, including dense PLGA microspheres, dense milled PLGA particles with an irregular shape, and porous PLGA microspheres, were respectively incorporated into CPC matrix. The influences of the morphology of PLGA particles on the setting time, porosity, mechanical properties, in vitro degradation, and cytocompatibility of CPC were comparatively investigated. The results showed that the CPC composites containing dense spherical and irregularly shaped PLGA particles showed proper setting time and better compressive strength, but the CPC composite incorporating porous PLGA microspheres significantly prolonged the final setting time and dramatically decreased the compressive strength of CPC. The CPC composite containing irregularly shaped PLGA particles has shown a slightly faster in vitro degradation rate than that containing dense PLGA microspheres. In addition, the CPC composites containing dense PLGA particles were beneficial for cell proliferation. Taken together, the dense PLGA particles are suitable for use as in situ pore forming agents in the CPC matrix, and meanwhile, the dense irregularly shaped PLGA particles are more easily prepared with low cost.
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Affiliation(s)
- Teliang Lu
- School
of Materials Science and Engineering and Key Laboratory of Biomedical
Materials of Ministry of Education, South
China University of Technology, Guangzhou 510641, China
- National
Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
- Key
Laboratory of Biomedical Engineering of Guangdong Province and Innovation
Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510641, China
| | - Fupo He
- School
of Electromechanical Engineering, Guangdong
University of Technology, Guangzhou 510006, China
| | - Jiandong Ye
- School
of Materials Science and Engineering and Key Laboratory of Biomedical
Materials of Ministry of Education, South
China University of Technology, Guangzhou 510641, China
- National
Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
- Key
Laboratory of Biomedical Engineering of Guangdong Province and Innovation
Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510641, China
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19
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Perier-Metz C, Duda GN, Checa S. Mechano-Biological Computer Model of Scaffold-Supported Bone Regeneration: Effect of Bone Graft and Scaffold Structure on Large Bone Defect Tissue Patterning. Front Bioeng Biotechnol 2020; 8:585799. [PMID: 33262976 PMCID: PMC7686036 DOI: 10.3389/fbioe.2020.585799] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 10/05/2020] [Indexed: 12/04/2022] Open
Abstract
Large segmental bone defects represent a clinical challenge for which current treatment procedures have many drawbacks. 3D-printed scaffolds may help to support healing, but their design process relies mainly on trial and error due to a lack of understanding of which scaffold features support bone regeneration. The aim of this study was to investigate whether existing mechano-biological rules of bone regeneration can also explain scaffold-supported bone defect healing. In addition, we examined the distinct roles of bone grafting and scaffold structure on the regeneration process. To that end, scaffold-surface guided migration and tissue deposition as well as bone graft stimulatory effects were included in an in silico model and predictions were compared to in vivo data. We found graft osteoconductive properties and scaffold-surface guided extracellular matrix deposition to be essential features driving bone defect filling in a 3D-printed honeycomb titanium structure. This knowledge paves the way for the design of more effective 3D scaffold structures and their pre-clinical optimization, prior to their application in scaffold-based bone defect regeneration.
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Affiliation(s)
- Camille Perier-Metz
- Julius Wolff Institute, Charité-Universitätsmedizin, Berlin, Germany.,MINES ParisTech - PSL Research University (Paris Sciences & Lettres), Paris, France
| | - Georg N Duda
- Julius Wolff Institute, Charité-Universitätsmedizin, Berlin, Germany.,Berlin Institute of Health (BIH) Center for Regenerative Therapies, Charité-Universitätsmedizin, Berlin, Germany
| | - Sara Checa
- Julius Wolff Institute, Charité-Universitätsmedizin, Berlin, Germany
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20
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Modeling osteoinduction in titanium bone scaffold with a representative channel structure. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 117:111347. [PMID: 32919693 DOI: 10.1016/j.msec.2020.111347] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 06/12/2020] [Accepted: 07/20/2020] [Indexed: 11/23/2022]
Abstract
Optimizing scaffold architecture for perfect osteointegration depends on good understanding of bone ingrowth in the porous space of implants. This study developed an immunoregulatory agent-based model to discover the osteoinduction mechanism in porous scaffolds. Immunoreaction, macrophage polarization, and the corresponding growth factors were combined in the model, and all played critical roles in recruiting osteogenic cells that migrated into the scaffolds. Angiogenesis was also considered in this model. The bone ingrowth predicted by the model coincides with results from published in vivo experiments. Simulation results suggested that the pore architecture affected the diffusion process of chemotactic factors in the scaffolds, subsequently influencing the complex reactions of diverse cells and the osteoinduction location. In flexural pore spaces, bone formation spread from the periphery into the center of scaffolds due to larger M2 phenotype macrophage populations colonizing boundary regions and the distribution of corresponding growth factors concentration. In straight channels, osteogenic cells migrated further inward and osteoinduction initiated in deeper position as a result of the deeper distribution of osteogenic cytokines concentration field.
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21
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Lutzweiler G, Ndreu Halili A, Engin Vrana N. The Overview of Porous, Bioactive Scaffolds as Instructive Biomaterials for Tissue Regeneration and Their Clinical Translation. Pharmaceutics 2020; 12:E602. [PMID: 32610440 PMCID: PMC7407612 DOI: 10.3390/pharmaceutics12070602] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/08/2020] [Accepted: 06/23/2020] [Indexed: 12/20/2022] Open
Abstract
Porous scaffolds have been employed for decades in the biomedical field where researchers have been seeking to produce an environment which could approach one of the extracellular matrixes supporting cells in natural tissues. Such three-dimensional systems offer many degrees of freedom to modulate cell activity, ranging from the chemistry of the structure and the architectural properties such as the porosity, the pore, and interconnection size. All these features can be exploited synergistically to tailor the cell-material interactions, and further, the tissue growth within the voids of the scaffold. Herein, an overview of the materials employed to generate porous scaffolds as well as the various techniques that are used to process them is supplied. Furthermore, scaffold parameters which modulate cell behavior are identified under distinct aspects: the architecture of inert scaffolds (i.e., pore and interconnection size, porosity, mechanical properties, etc.) alone on cell functions followed by comparison with bioactive scaffolds to grasp the most relevant features driving tissue regeneration. Finally, in vivo outcomes are highlighted comparing the accordance between in vitro and in vivo results in order to tackle the future translational challenges in tissue repair and regeneration.
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Affiliation(s)
- Gaëtan Lutzweiler
- Institut National de la Santé et de la Recherche Medicale, UMR_S 1121, 11 rue Humann, 67085 Strasbourg CEDEX, France
| | - Albana Ndreu Halili
- Department of Information Technology, Aleksander Moisiu University, 2001 Durres, Albania;
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22
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Wang L, Shi Q, Cai Y, Chen Q, Guo X, Li Z. Mechanical–chemical coupled modeling of bone regeneration within a biodegradable polymer scaffold loaded with VEGF. Biomech Model Mechanobiol 2020; 19:2285-2306. [DOI: 10.1007/s10237-020-01339-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 05/12/2020] [Indexed: 10/24/2022]
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23
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Biomimetic organic-inorganic hybrid hydrogel electrospinning periosteum for accelerating bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110670. [DOI: 10.1016/j.msec.2020.110670] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 01/07/2020] [Accepted: 01/13/2020] [Indexed: 12/29/2022]
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24
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Shahabipour F, Ashammakhi N, Oskuee RK, Bonakdar S, Hoffman T, Shokrgozar MA, Khademhosseini A. Key components of engineering vascularized 3-dimensional bioprinted bone constructs. Transl Res 2020; 216:57-76. [PMID: 31526771 DOI: 10.1016/j.trsl.2019.08.010] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 08/28/2019] [Accepted: 08/30/2019] [Indexed: 12/16/2022]
Abstract
Vascularization has a pivotal role in engineering successful tissue constructs. However, it remains a major hurdle of bone tissue engineering, especially in clinical applications for the treatment of large bone defects. Development of vascularized and clinically-relevant engineered bone substitutes with sufficient blood supply capable of maintaining implant viability and supporting subsequent host tissue integration remains a major challenge. Since only cells that are 100-200 µm from blood vessels can receive oxygen through diffusion, engineered constructs that are thicker than 400 µm face a challenging oxygenation problem. Following implantation in vivo, spontaneous ingrowth of capillaries in thick engineered constructs is too slow. Thus, it is critical to provide optimal conditions to support vascularization in engineered bone constructs. To achieve this, an in-depth understanding of the mechanisms of angiogenesis and bone development is required. In addition, it is also important to mimic the physiological milieu of native bone to fabricate more successful vascularized bone constructs. Numerous applications of engineered vascularization with cell-and/or microfabrication-based approaches seek to meet these aims. Three-dimensional (3D) printing promises to create patient-specific bone constructs in the future. In this review, we discuss the major components of fabricating vascularized 3D bioprinted bone constructs, analyze their related challenges, and highlight promising future trends.
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Affiliation(s)
- Fahimeh Shahabipour
- National cell bank of Iran, Pasteur Institute of Iran, Tehran, Iran; Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, California; California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, California; Department of Bioengineering, University of California, Los Angeles, Los Angeles, California
| | - Nureddin Ashammakhi
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, California; California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, California; Department of Bioengineering, University of California, Los Angeles, Los Angeles, California; Department of Radiological Sciences, University of California, Los Angeles, Los Angeles, California
| | - Reza K Oskuee
- Targeted Drug Delivery Research Center, Institute of Pharmaceutical Technology, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Shahin Bonakdar
- National cell bank of Iran, Pasteur Institute of Iran, Tehran, Iran
| | - Tyler Hoffman
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, California; California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, California; Department of Bioengineering, University of California, Los Angeles, Los Angeles, California
| | | | - Ali Khademhosseini
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, California; California NanoSystems Institute (CNSI), University of California, Los Angeles, Los Angeles, California; Department of Bioengineering, University of California, Los Angeles, Los Angeles, California; Department of Radiological Sciences, University of California, Los Angeles, Los Angeles, California; Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California.
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25
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Checchi M, Bertacchini J, Cavani F, Magarò MS, Reggiani Bonetti L, Pugliese GR, Tamma R, Ribatti D, Maurel DB, Palumbo C. Scleral ossicles: angiogenic scaffolds, a novel biomaterial for regenerative medicine applications. Biomater Sci 2019; 8:413-425. [PMID: 31738355 DOI: 10.1039/c9bm01234f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Given the current prolonged life expectancy, various pathologies affect increasingly the aging subjects. Regarding the musculoskeletal apparatus, bone fragility induces more susceptibility to fractures, often not accompanied by good ability of self-repairing, in particular when critical-size defects (CSD) occur. Currently orthopedic surgery makes use of allografting and autografting which, however, have limitations due to the scarce amount of tissue that can be taken from the donor, the possibility of disease transmission and donor site morbidity. The need to develop new solutions has pushed the field of tissue engineering (TE) research to study new scaffolds to be functionalized in order to obtain constructs capable of promoting tissue regeneration and achieve stable bone recovery over time. This investigation focuses on the most important aspect related to bone tissue regeneration: the angiogenic properties of the scaffold to be used. As an innovative solution, scleral ossicles (SOs), previously characterized as natural, biocompatible and spontaneously decellularized scaffolds used for bone repair, were tested for angiogenic potential and biocompatibility. To reach this purpose, in ovo Chorioallantoic Membrane Assay (CAM) was firstly used to test the angiogenic potential; secondly, in vivo subcutaneous implantation of SOs (in a rat model) was performed in order to assess the biocompatibility and the inflammatory response. Finally, thanks to the analysis of mass spectrometry (LCMSQE), the putative proteins responsible for the SO angiogenic properties were identified. Thus, a novel natural biomaterial is proposed, which is (i) able to induce an angiogenic response in vivo by subcutaneous implantation in a non-immunodeficient animal model, (ii) which does not induce any inflammatory response, and (iii) is useful for regenerative medicine application for the healing of bone CSD.
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Affiliation(s)
- Marta Checchi
- Department of Biomedical, Metabolic Science and Neuroscience, University of Modena and Reggio Emilia, 41125 Modena, Italy.
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Tao C, Lina X, Changxuan W, Cong L, Xiaolan Y, Tao H, Hong A. Orthogonal test design for the optimization of superparamagnetic chitosan plasmid gelatin microspheres that promote vascularization of artificial bone. J Biomed Mater Res B Appl Biomater 2019; 108:1439-1449. [PMID: 31605570 PMCID: PMC7187448 DOI: 10.1002/jbm.b.34491] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 08/06/2019] [Accepted: 09/02/2019] [Indexed: 12/20/2022]
Abstract
The optimal conditions for the preparation of superparamagnetic chitosan plasmid (pReceiver‐M29‐VEGF165/DH5a) gelatin microspheres (SPCPGMs) were determined. Then, the performance of the SPCPGMs during neovascularization was evaluated in vivo. The SPCPGMs were prepared through a cross‐linking curing method and then filled into the hollow scaffold of an artificial bone. Neovascularization at the bone defect position was histologically examined in samples collected 2, 4, 6, and 8 weeks after the operation. The cellular magnetofection rate of superparamagnetic chitosan nanoparticles/plasmid (pReceiver‐M29‐VEGF165/DH5a) complexes reached 1–3% under static magnetic field (SMF). Meanwhile, the optimal conditions for SPCPGM fabrication were 20% Fe3O4 (w/v), 4 mg of plasmid, 5.3 mg of glutaraldehyde, and 500 rpm of emulsification rotate speed. Under oscillating magnetic fields (OMFs), 4–6 μg of plasmids was released daily for 21 days. Under the combined application of SMF and OMF, evident neovascularization occurred at the bone defect position 6 weeks after the operation. This result is expected to provide a new type of angiogenesis strategy for the research of bone tissue engineering.
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Affiliation(s)
- Chen Tao
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R China, Chongqing Key Laboratory of Pediatrics, Chongqing Engineering Research Center of Stem Cell Therapy
| | - Xie Lina
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R China, Chongqing Key Laboratory of Pediatrics, Chongqing Engineering Research Center of Stem Cell Therapy
| | - Wang Changxuan
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R China, Chongqing Key Laboratory of Pediatrics, Chongqing Engineering Research Center of Stem Cell Therapy
| | - Luo Cong
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R China, Chongqing Key Laboratory of Pediatrics, Chongqing Engineering Research Center of Stem Cell Therapy
| | - Yang Xiaolan
- Department of Pharmacology, Chongqing Medical University, Yuzhong District, Yixueyuan Road1#, Chongqing, 400016, China
| | - Huang Tao
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, P.R China, Chongqing Key Laboratory of Pediatrics, Chongqing Engineering Research Center of Stem Cell Therapy
| | - An Hong
- Department of Orthopaedics, The First Affiliated Hospital of Chongqing Medical University, Yuzhong District, Youyi Road 1#, Chongqing, 400016, China
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27
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Sun X, Hu B. Mathematical modeling and computational prediction of cancer drug resistance. Brief Bioinform 2019; 19:1382-1399. [PMID: 28981626 PMCID: PMC6402530 DOI: 10.1093/bib/bbx065] [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: 03/29/2017] [Indexed: 12/23/2022] Open
Abstract
Diverse forms of resistance to anticancer drugs can lead to the failure of chemotherapy. Drug resistance is one of the most intractable issues for successfully treating cancer in current clinical practice. Effective clinical approaches that could counter drug resistance by restoring the sensitivity of tumors to the targeted agents are urgently needed. As numerous experimental results on resistance mechanisms have been obtained and a mass of high-throughput data has been accumulated, mathematical modeling and computational predictions using systematic and quantitative approaches have become increasingly important, as they can potentially provide deeper insights into resistance mechanisms, generate novel hypotheses or suggest promising treatment strategies for future testing. In this review, we first briefly summarize the current progress of experimentally revealed resistance mechanisms of targeted therapy, including genetic mechanisms, epigenetic mechanisms, posttranslational mechanisms, cellular mechanisms, microenvironmental mechanisms and pharmacokinetic mechanisms. Subsequently, we list several currently available databases and Web-based tools related to drug sensitivity and resistance. Then, we focus primarily on introducing some state-of-the-art computational methods used in drug resistance studies, including mechanism-based mathematical modeling approaches (e.g. molecular dynamics simulation, kinetic model of molecular networks, ordinary differential equation model of cellular dynamics, stochastic model, partial differential equation model, agent-based model, pharmacokinetic–pharmacodynamic model, etc.) and data-driven prediction methods (e.g. omics data-based conventional screening approach for node biomarkers, static network approach for edge biomarkers and module biomarkers, dynamic network approach for dynamic network biomarkers and dynamic module network biomarkers, etc.). Finally, we discuss several further questions and future directions for the use of computational methods for studying drug resistance, including inferring drug-induced signaling networks, multiscale modeling, drug combinations and precision medicine.
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Affiliation(s)
- Xiaoqiang Sun
- Zhong-shan School of Medicine, Sun Yat-Sen University
| | - Bin Hu
- School of Information Science and Engineering, Lanzhou University
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28
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Deng Z, Lin B, Jiang Z, Huang W, Li J, Zeng X, Wang H, Wang D, Zhang Y. Hypoxia-Mimicking Cobalt-Doped Borosilicate Bioactive Glass Scaffolds with Enhanced Angiogenic and Osteogenic Capacity for Bone Regeneration. Int J Biol Sci 2019; 15:1113-1124. [PMID: 31223273 PMCID: PMC6567802 DOI: 10.7150/ijbs.32358] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/23/2019] [Indexed: 12/21/2022] Open
Abstract
The osteogenic capacity of synthetic bone substitutes is will be highly stimulated by a well-established functional vascularized network. Cobalt (Co) ions are known that can generate a hypoxia-like response and stimulates the production of kinds of angiogenic factors. Herein, we investigated the mechanism of cobalt-doped bioactive borosilicate (36B2O3, 22CaO, 18SiO2, 8MgO, 8K2O, 6Na2O, 2P2O5; mol%) glass scaffolds for bone tissues repairing and blood vessel formation in the critical-sized cranial defect site of rats and their effects on the hBMSCs in vitro were researched. The scaffolds can control release Co2+ ions and convert into hydroxyapatite soaking in simulative body fluids (SBF). The fabircated scaffolds without cytotoxic strongly improves HIF-1α generation, VEGF protein secretion, ALP activity and upregulates the expression of osteoblast and angiogenic relative genes in hBMSCs. Eight weeks after implantation, the bioactive glass scaffolds with 3wt % CoO remarkablely enhance bone regeneration and blood vascularized network at the defective site. In conclusion, as a graft material for bone defects, low-oxygen simulated cobalt-doped bioactive glass scaffold is promising.
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Affiliation(s)
- Zhengwei Deng
- Department of Orthopedics, South Campus of Shanghai Sixth People's Hospital Affiliated of Shanghai University of Medicine&Health Sciences, 279 zhouzhu road, Shanghai 220120, People's Republic of China
- Graduate School, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People's Republic of China
| | - Bocai Lin
- Laboratory for Advance Lubricating Materials, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People's Republic of China
| | - Zenghui Jiang
- Department of Orthopedic Surgery, Zhejiang Hospital, Hangzhou 310013, People's Republic of China
| | - Wenhai Huang
- School of Materials Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Jiusheng Li
- Laboratory for Advance Lubricating Materials, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People's Republic of China
| | - Xiangqiong Zeng
- Laboratory for Advance Lubricating Materials, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People's Republic of China
| | - Hui Wang
- Laboratory for Advance Lubricating Materials, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People's Republic of China
| | - Deping Wang
- School of Materials Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
| | - Yadong Zhang
- Department of Orthopedics, South Campus of Shanghai Sixth People's Hospital Affiliated of Shanghai University of Medicine&Health Sciences, 279 zhouzhu road, Shanghai 220120, People's Republic of China
- Shanghai Fengxian District Central Hospital Affiliated of Southern Medical University, Shanghai 201400, People's Republic of China
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29
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Koons GL, Mikos AG. Progress in three-dimensional printing with growth factors. J Control Release 2019; 295:50-59. [PMID: 30579982 PMCID: PMC6358495 DOI: 10.1016/j.jconrel.2018.12.035] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 11/06/2018] [Accepted: 12/19/2018] [Indexed: 12/19/2022]
Abstract
Incorporation of growth factors in biomedical constructs can encourage cellular activities necessary for tissue regeneration within an implant system. Three-dimensional printing offers a capacity for spatial dictation and dosage control of incorporated growth factors which promises to minimize complications from the supraphysiologic doses and burst release involved in current growth factor delivery systems. Successful implementation of three-dimensional printing with growth factors requires preservation of the bioactivity of printed growth factors, spatial localization of growth factors within the construct architecture during printing, and controlled release of growth factors after printing. This review describes demonstrated approaches for addressing each of these goals, including direct inclusion of growth factors with the biomaterial during printing, or intermediary encapsulation of growth factors in delivery vehicles such as microparticles or nanoparticles.
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Affiliation(s)
- Gerry L Koons
- Department of Bioengineering, Rice University, Houston, TX, USA; Center for Engineering Complex Tissues, USA; Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, USA.
| | - Antonios G Mikos
- Department of Bioengineering, Rice University, Houston, TX, USA; Center for Engineering Complex Tissues, USA.
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30
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Luo C, Yang X, Li M, Huang H, Kang Q, Zhang X, Hui H, Zhang X, Cen C, Luo Y, Xie L, Wang C, He T, Jiang D, Li T, An H. A novel strategy for in vivo angiogenesis and osteogenesis: magnetic micro-movement in a bone scaffold. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2018; 46:636-645. [DOI: 10.1080/21691401.2018.1465947] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Cong Luo
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - Xiaolan Yang
- College of Laboratory Medicine, Chongqing Medical University, Chongqing, China
| | - Ming Li
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - Hua Huang
- Department of Pharmacology, Chongqing Medical University, Chongqing, China
| | - Quan Kang
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - Xiaobo Zhang
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - Hui Hui
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - Xin Zhang
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - Chaode Cen
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - Yujia Luo
- Clinical Medicine Department, The First Clinical Institute, Zunyi Medical University, Zunyi, Guizhou, China
| | - Lina Xie
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - Changxuan Wang
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - Tongchuan He
- Molecular Oncology Laboratory, Medical Center, University of Chicago, IL, USA
| | - Dianming Jiang
- Department of Orthopaedics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Tingyu Li
- Department of Orthopaedics, Children's Hospital of Chongqing Medical University, Ministry of Education Key Laboratory of Child Development and Disorders, Key Laboratory of Pediatrics in Chongqing, Chongqing International Science and Technology Cooperation Center for Child Development and Disorders, Chongqing, China
| | - Hong An
- Department of Orthopaedics, the First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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31
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Zheng Y, Bao J, Zhao Q, Zhou T, Sun X. A Spatio-Temporal Model of Macrophage-Mediated Drug Resistance in Glioma Immunotherapy. Mol Cancer Ther 2018; 17:814-824. [PMID: 29440290 DOI: 10.1158/1535-7163.mct-17-0634] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 11/01/2017] [Accepted: 01/18/2018] [Indexed: 11/16/2022]
Abstract
The emergence of drug resistance is often an inevitable obstacle that limits the long-term effectiveness of clinical cancer chemotherapeutics. Although various forms of cancer cell-intrinsic mechanisms of drug resistance have been experimentally revealed, the role and the underlying mechanism of tumor microenvironment in driving the development of acquired drug resistance remain elusive, which significantly impedes effective clinical cancer treatment. Recent experimental studies have revealed a macrophage-mediated drug resistance mechanism in which the tumor microenvironment undergoes adaptation in response to macrophage-targeted colony-stimulating factor-1 receptor (CSF1R) inhibition therapy in gliomas. In this study, we developed a spatio-temporal model to quantitatively describe the interplay between glioma cells and CSF1R inhibitor-targeted macrophages through CSF1 and IGF1 pathways. Our model was used to investigate the evolutionary kinetics of the tumor regrowth and the associated dynamic adaptation of the tumor microenvironment in response to the CSF1R inhibitor treatment. The simulation result obtained using this model was in agreement with the experimental data. The sensitivity analysis revealed the key parameters involved in the model, and their potential impacts on the model behavior were examined. Moreover, we demonstrated that the drug resistance is dose-dependent. In addition, we quantitatively evaluated the effects of combined CSFR inhibition and IGF1 receptor (IGF1R) inhibition with the goal of designing more effective therapies for gliomas. Our study provides quantitative and mechanistic insights into the microenvironmental adaptation mechanisms that operate during macrophage-targeted immunotherapy and has implications for drug dose optimization and the design of more effective combination therapies. Mol Cancer Ther; 17(4); 814-24. ©2018 AACR.
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Affiliation(s)
- Yongjiang Zheng
- Department of Hematology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Jiguang Bao
- School of Mathematical Sciences, Beijing Normal University, Beijing, China
| | - Qiyi Zhao
- Department of Infectious Diseases, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Tianshou Zhou
- School of Mathematical and Computational Science, Sun Yat-Sen University, Guangzhou, China
| | - Xiaoqiang Sun
- Zhong-shan School of Medicine, Sun Yat-Sen University, Guangzhou, China. .,Key Laboratory of Tropical Disease Control (Sun Yat-Sen University), Chinese Ministry of Education, Guangzhou, Guangdong, China
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32
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Xie R, Hu J, Hoffmann O, Zhang Y, Ng F, Qin T, Guo X. Self-fitting shape memory polymer foam inducing bone regeneration: A rabbit femoral defect study. Biochim Biophys Acta Gen Subj 2018; 1862:936-945. [PMID: 29360569 DOI: 10.1016/j.bbagen.2018.01.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 01/17/2018] [Accepted: 01/18/2018] [Indexed: 02/05/2023]
Abstract
Although tissue engineering has been attracted greatly for healing of critical-sized bone defects, great efforts for improvement are still being made in scaffold design. In particular, bone regeneration would be enhanced if a scaffold precisely matches the contour of bone defects, especially if it could be implanted into the human body conveniently and safely. In this study, polyurethane/hydroxyapatite-based shape memory polymer (SMP) foam was fabricated as a scaffold substrate to facilitate bone regeneration. The minimally invasive delivery and the self-fitting behavior of the SMP foam were systematically evaluated to demonstrate its feasibility in the treatment of bone defects in vivo. Results showed that the SMP foam could be conveniently implanted into bone defects with a compact shape. Subsequently, it self-matched the boundary of bone defects upon shape-recovery activation in vivo. Micro-computed tomography determined that bone ingrowth initiated at the periphery of the SMP foam with a constant decrease towards the inside. Successful vascularization and bone remodeling were also demonstrated by histological analysis. Thus, our results indicate that the SMP foam demonstrated great potential for bone regeneration.
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Affiliation(s)
- Ruiqi Xie
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Jinlian Hu
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China; Intelligent Biomedical Materials Center, Shenzhen Base of The Hong Kong Polytechnic University, Shenzhen, China.
| | - Oskar Hoffmann
- Institute of Pharmacology and Toxicology, University of Vienna, Vienna, Austria
| | - Yuanchi Zhang
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Frankie Ng
- Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Tingwu Qin
- Institute of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Xia Guo
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
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33
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Sharma A, Molla MDS, Katti KS, Katti DR. Multiscale Models of Degradation and Healing of Bone Tissue Engineering Nanocomposite Scaffolds. JOURNAL OF NANOMECHANICS AND MICROMECHANICS 2017. [DOI: 10.1061/(asce)nm.2153-5477.0000133] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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34
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Functionalized biomimetic calcium phosphates for bone tissue repair. J Appl Biomater Funct Mater 2017; 15:e313-e325. [PMID: 28574097 DOI: 10.5301/jabfm.5000367] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/11/2017] [Indexed: 12/17/2022] Open
Abstract
The design and development of novel materials for biomineralized tissues is an extremely attractive field of research where calcium phosphates (CaPs)-based materials for biomedical applications play a leading role. The biological performance of these compounds can be enhanced through functionalization with biologically active ions and molecules. This review reports on some important recent achievements in creating functionalized biomimetic CaP materials for applications in the musculoskeletal field. Particular attention is focused on the modifications of these inorganic compounds with bioactive ions, growth factors and drugs, as well as on recent trends in some important CaP applications as biomaterials - namely, as bone cements, coatings of metallic implants and scaffolds for regenerative medicine.
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35
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Janbaz S, Noordzij N, Widyaratih DS, Hagen CW, Fratila-Apachitei LE, Zadpoor AA. Origami lattices with free-form surface ornaments. SCIENCE ADVANCES 2017; 3:eaao1595. [PMID: 29209661 PMCID: PMC5710187 DOI: 10.1126/sciadv.aao1595] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 11/06/2017] [Indexed: 05/21/2023]
Abstract
Lattice structures are used in the design of metamaterials to achieve unusual physical, mechanical, or biological properties. The properties of such metamaterials result from the topology of the lattice structures, which are usually three-dimensionally (3D) printed. To incorporate advanced functionalities into metamaterials, the surface of the lattice structures may need to be ornamented with functionality-inducing features, such as nanopatterns or electronic devices. Given our limited access to the internal surfaces of lattice structures, free-form ornamentation is currently impossible. We present lattice structures that are folded from initially flat states and show that they could bear arbitrarily complex surface ornaments at different scales. We identify three categories of space-filling polyhedra as the basic unit cells of the cellular structures and, for each of those, propose a folding pattern. We also demonstrate "sequential self-folding" of flat constructs to 3D lattices. Furthermore, we folded auxetic mechanical metamaterials from flat sheets and measured the deformation-driven change in their negative Poisson's ratio. Finally, we show how free-form 3D ornaments could be applied on the surface of flat sheets with nanometer resolution. Together, these folding patterns and experimental techniques present a unique platform for the fabrication of metamaterials with unprecedented combination of physical properties and surface-driven functionalities.
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Affiliation(s)
- Shahram Janbaz
- Additive Manufacturing Laboratory, Department of Biomechanical Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2628CD, Netherlands
| | - Niels Noordzij
- Department of Imaging Physics, Faculty of Applied Physics, Delft University of Technology (TU Delft), Lorentzweg 1, Delft 2628CJ, Netherlands
| | - Dwisetya S. Widyaratih
- Additive Manufacturing Laboratory, Department of Biomechanical Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2628CD, Netherlands
| | - Cornelis W. Hagen
- Department of Imaging Physics, Faculty of Applied Physics, Delft University of Technology (TU Delft), Lorentzweg 1, Delft 2628CJ, Netherlands
| | - Lidy E. Fratila-Apachitei
- Additive Manufacturing Laboratory, Department of Biomechanical Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2628CD, Netherlands
| | - Amir A. Zadpoor
- Additive Manufacturing Laboratory, Department of Biomechanical Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2628CD, Netherlands
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Repair of large saddle defects of the mandibular ridge using dual growth factor release-An experimental pilot study in minipigs. J Clin Periodontol 2017; 44:854-863. [DOI: 10.1111/jcpe.12739] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/22/2017] [Indexed: 01/27/2023]
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Akintewe OO, Roberts EG, Rim NG, Ferguson MA, Wong JY. Design Approaches to Myocardial and Vascular Tissue Engineering. Annu Rev Biomed Eng 2017; 19:389-414. [DOI: 10.1146/annurev-bioeng-071516-044641] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Olukemi O. Akintewe
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215;, ,
| | - Erin G. Roberts
- Division of Materials Science and Engineering, Boston University, Boston, Massachusetts 02215;,
| | - Nae-Gyune Rim
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215;, ,
| | - Michael A.H. Ferguson
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215;, ,
| | - Joyce Y. Wong
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts 02215;, ,
- Division of Materials Science and Engineering, Boston University, Boston, Massachusetts 02215;,
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Mostafa AA, El-Sayed MMH, Mahmoud AA, Gamal-Eldeen AM. Bioactive/Natural Polymeric Scaffolds Loaded with Ciprofloxacin for Treatment of Osteomyelitis. AAPS PharmSciTech 2017; 18:1056-1069. [PMID: 27520562 DOI: 10.1208/s12249-016-0605-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Accepted: 07/25/2016] [Indexed: 11/30/2022] Open
Abstract
Local delivery of antibiotic into injured bone is a demand. In this work, different scaffolds of chitosan (C) with or without bioactive glass (G) were prepared using the freeze-drying technique in 2:1, 1:1, and 1:2 weight ratios. Chitosan scaffolds and selected formulas of chitosan to bioglass were loaded with ciprofloxacin in 5%, 10%, and 20% w/w. Scaffold morphology showed an interconnected porous structure, where the glass particles were homogeneously dispersed in the chitosan matrix. The kinetic study confirmed that the scaffold containing 1:2 weight ratio of chitosan to glass (CG12) showed optimal bioactivity with good compromise between Ca and P uptake capacities and Si release rate. Chitosan/bioactive glass scaffolds showed larger t 50 values indicating less burst drug release followed by a sustained drug release profile compared to that of chitosan scaffolds. The cell growth, migration, adhesion, and invasion were enhanced onto CG12 scaffold surfaces. Samples of CG12 scaffolds with or without 5% drug induced vascular endothelial growth factor (VEGF), while those containing 10% drug diminished VEGF level. Only CG12 induced the cell differentiation (alkaline phosphatase activity). In conclusion, CG12 containing 5% drug can be considered a biocompatible carrier which would help in the localized osteomyelitis treatment.
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39
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Mathematical and Computational Modeling in Complex Biological Systems. BIOMED RESEARCH INTERNATIONAL 2017; 2017:5958321. [PMID: 28386558 PMCID: PMC5366773 DOI: 10.1155/2017/5958321] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Revised: 12/20/2016] [Accepted: 01/16/2017] [Indexed: 12/22/2022]
Abstract
The biological process and molecular functions involved in the cancer progression remain difficult to understand for biologists and clinical doctors. Recent developments in high-throughput technologies urge the systems biology to achieve more precise models for complex diseases. Computational and mathematical models are gradually being used to help us understand the omics data produced by high-throughput experimental techniques. The use of computational models in systems biology allows us to explore the pathogenesis of complex diseases, improve our understanding of the latent molecular mechanisms, and promote treatment strategy optimization and new drug discovery. Currently, it is urgent to bridge the gap between the developments of high-throughput technologies and systemic modeling of the biological process in cancer research. In this review, we firstly studied several typical mathematical modeling approaches of biological systems in different scales and deeply analyzed their characteristics, advantages, applications, and limitations. Next, three potential research directions in systems modeling were summarized. To conclude, this review provides an update of important solutions using computational modeling approaches in systems biology.
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Preparation, physicochemical properties and biocompatibility of PBLG/PLGA/bioglass composite scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:118-124. [DOI: 10.1016/j.msec.2016.09.085] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 08/31/2016] [Accepted: 09/29/2016] [Indexed: 12/13/2022]
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41
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Yu W, Sun TW, Ding Z, Qi C, Zhao H, Chen F, Shi Z, Zhu YJ, Chen D, He Y. Copper-doped mesoporous hydroxyapatite microspheres synthesized by a microwave-hydrothermal method using creatine phosphate as an organic phosphorus source: application in drug delivery and enhanced bone regeneration. J Mater Chem B 2017; 5:1039-1052. [PMID: 32263882 DOI: 10.1039/c6tb02747d] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The development of multifunctional biomaterials with drug delivery ability, and pro-osteogenic and pro-angiogenic activities has garnered increasing interest in the field of regenerative medicine. In the present study, hypoxia-mimicking copper (Cu)-doped mesoporous hydroxyapatite (HAP) microspheres (Cu-MHMs) were successfully synthesized through a microwave-hydrothermal method by using creatine phosphate as an organic phosphorus source. The Cu-MHMs doped with 0.2, 0.5 and 1 mol% Cu were prepared. The Cu-MHMs consisting of HAP nanorods or nanosheets exhibited a hierarchically mesoporous hollow structure and a high specific surface area. Then the Cu-MHMs were investigated as a drug nanocarrier using doxorubicin hydrochloride (DOX) as a model drug. The Cu-MHMs showed a relatively high drug-loading capacity and a pH-responsive drug release behavior. Furthermore, the Cu-MHMs were incorporated into a chitosan (CS) matrix to construct a biomimetic scaffold optimized for bone regeneration. The Cu-MHM/CS composite scaffolds maintained high degrees of porosity and showed a sustained release of Cu ions. More importantly, the Cu-MHM/CS scaffolds not only enhanced the osteogenic differentiation of rat bone marrow-derived mesenchymal stem cells (rBMSCs) but also promoted the migration and tube formation of EA.hy926 cells. When implanted in rat critical-sized calvarial defects, the Cu-MHM/CS scaffolds significantly enhanced bone regeneration accompanied by more new blood vessel formation at 8 weeks post-operation compared with the MHM/CS scaffolds. These results suggest that the hypoxia-mimicking Cu-MHM/CS scaffolds could encourage bone regeneration by enhancing osteogenesis and angiogenesis simultaneously, which bodes well for the reconstruction of vascularized tissue-engineered bone.
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Affiliation(s)
- Weilin Yu
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, 600 Yishan Road, Shanghai 200233, China.
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Zhang ML, Cheng J, Xiao YC, Yin RF, Feng X. Raloxifene microsphere-embedded collagen/chitosan/β-tricalcium phosphate scaffold for effective bone tissue engineering. Int J Pharm 2016; 518:80-85. [PMID: 27988379 DOI: 10.1016/j.ijpharm.2016.12.031] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 12/07/2016] [Accepted: 12/13/2016] [Indexed: 12/16/2022]
Abstract
Engineering novel scaffolds that can mimic the functional extracellular matrix (ECM) would be a great achievement in bone tissue engineering. This paper reports the fabrication of novel collagen/chitosan/β-tricalcium phosphate (CCTP) based tissue engineering scaffold. In order to improve the regeneration ability of scaffold, we have embedded raloxifene (RLX)-loaded PLGA microsphere in the CCTP scaffold. The average pore of scaffold was in the range of 150-200μm with ideal mechanical strength and swelling/degradation characteristics. The release rate of RLX from the microsphere (MS) embedded scaffold was gradual and controlled. Also a significantly enhanced cell proliferation was observed in RLX-MS exposed cell group suggesting that microsphere/scaffold could be an ideal biomaterial for bone tissue engineering. Specifically, RLX-MS showed a significantly higher Alizarin red staining indicating the higher mineralization capacity of this group. Furthermore, a high alkaline phosphatase (ALP) activity for RLX-MS exposed group after 15days incubation indicates the bone regeneration capacity of MC3T3-E1 cells. Overall, present study showed that RLX-loaded microsphere embedded scaffold has the promising potential for bone tissue engineering applications.
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Affiliation(s)
- Ming-Lei Zhang
- Depatrment of Orthopaedics, China-Japan Union Hospital, Jilin University, China
| | - Ji Cheng
- Depatrment Obstetrics and Gynecology, China-Japan Union Hospital, Jilin University, China
| | - Ye-Chen Xiao
- Department of Biochemistry and Molecular Biology, College of Basic Medical Science, Jilin University, China
| | - Ruo-Feng Yin
- Depatrment of Orthopaedics, China-Japan Union Hospital, Jilin University, China.
| | - Xu Feng
- Department of Spine Surgery, 1st Hospital of Jilin University No. 71 Xinmin St, Changchun, China.
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43
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Lin L, Wang T, Zhou Q, Qian N. The effects of different amounts of drug microspheres on the vivo and vitro performance of the PLGA/β-TCP scaffold. Des Monomers Polym 2016; 20:351-362. [PMID: 29491806 PMCID: PMC5784873 DOI: 10.1080/15685551.2016.1259839] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 11/09/2016] [Indexed: 11/03/2022] Open
Abstract
OIC-A006 (BMPs osteogenesis compounds), can stimulate bone marrow mesenchymal stem cells ALP, OPN, OC, Cbfal expression. To stimulate new bone formation in the body. We postulate different amounts of drug microspheres on the PLGA/β-CPT scaffold can produce the effects on performance and sustained release characteristics. In this paper, through adding different amount of carrier drug microsphere, three concentrations scaffolds which are 12.5, 18.75 and 25 μmol/L are prepared by adding different amounts of drug-loaded microspheres. Hereafter called OICM/CPT-200, OICM/CPT-300, OICM/CPT-400. We implant them in rat femur diameter 3 mm depth of 3 mm hole for eight weeks. The degradation, microsphere, delivery properties, with X-ray, micro-CT and histology are tested. Results show that the contain carrier drug microsphere scaffolds become radiopaque, and the gaps between the scaffold and radial cut ends are often invisible. This preliminary study reveals that different carrier drug microsphere has a corresponding effect the performance of stent body, OICM/CPT – 200 scaffolds induction effect is best. Illustrates that the low concentration load OIC-A006 microspheres can promote bone healing, and high concentration of OIC-A006 micro ball is played a inhibitory effect on bone healing process.
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Affiliation(s)
- Liulan Lin
- Rapid Manufacture Engineering Center, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China
| | - Tianjiang Wang
- Rapid Manufacture Engineering Center, School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China
| | - Qi Zhou
- Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Niandong Qian
- Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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44
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Computational modelling of local calcium ions release from calcium phosphate-based scaffolds. Biomech Model Mechanobiol 2016; 16:425-438. [DOI: 10.1007/s10237-016-0827-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 08/29/2016] [Indexed: 11/29/2022]
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45
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Zhang L, Qiao M, Gao H, Hu B, Tan H, Zhou X, Li CM. Investigation of mechanism of bone regeneration in a porous biodegradable calcium phosphate (CaP) scaffold by a combination of a multi-scale agent-based model and experimental optimization/validation. NANOSCALE 2016; 8:14877-87. [PMID: 27460959 PMCID: PMC10150920 DOI: 10.1039/c6nr01637e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Herein, we have developed a novel approach to investigate the mechanism of bone regeneration in a porous biodegradable calcium phosphate (CaP) scaffold by a combination of a multi-scale agent-based model, experimental optimization of key parameters and experimental data validation of the predictive power of the model. The advantages of this study are that the impact of mechanical stimulation on bone regeneration in a porous biodegradable CaP scaffold is considered, experimental design is used to investigate the optimal combination of growth factors loaded on the porous biodegradable CaP scaffold to promote bone regeneration and the training, testing and analysis of the model are carried out by using experimental data, a data-mining algorithm and related sensitivity analysis. The results reveal that mechanical stimulation has a great impact on bone regeneration in a porous biodegradable CaP scaffold and the optimal combination of growth factors that are encapsulated in nanospheres and loaded into porous biodegradable CaP scaffolds layer-by-layer can effectively promote bone regeneration. Furthermore, the model is robust and able to predict the development of bone regeneration under specified conditions.
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Affiliation(s)
- Le Zhang
- College of Computer and Information Science, Southwest University, Chongqing 400715, P. R. China.
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46
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Zhong Q, Li W, Su X, Li G, Zhou Y, Kundu SC, Yao J, Cai Y. Degradation pattern of porous CaCO 3 and hydroxyapatite microspheres in vitro and in vivo for potential application in bone tissue engineering. Colloids Surf B Biointerfaces 2016; 143:56-63. [DOI: 10.1016/j.colsurfb.2016.03.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/23/2016] [Accepted: 03/06/2016] [Indexed: 12/31/2022]
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47
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Decellularized skin/adipose tissue flap matrix for engineering vascularized composite soft tissue flaps. Acta Biomater 2016; 35:166-84. [PMID: 26876876 DOI: 10.1016/j.actbio.2016.02.017] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2015] [Revised: 02/06/2016] [Accepted: 02/11/2016] [Indexed: 02/07/2023]
Abstract
Using a perfusion decellularization protocol, we developed a decellularized skin/adipose tissue flap (DSAF) comprising extracellular matrix (ECM) and intact vasculature. Our DSAF had a dominant vascular pedicle, microcirculatory vascularity, and a sensory nerve network and retained three-dimensional (3D) nanofibrous structures well. DSAF, which was composed of collagen and laminin with well-preserved growth factors (e.g., vascular endothelial growth factor, basic fibroblast growth factor), was successfully repopulated with human adipose-derived stem cells (hASCs) and human umbilical vein endothelial cells (HUVECs), which integrated with DSAF and formed 3D aggregates and vessel-like structures in vitro. We used microsurgery techniques to re-anastomose the recellularized DSAF into nude rats. In vivo, the engineered flap construct underwent neovascularization and constructive remodeling, which was characterized by the predominant infiltration of M2 macrophages and significant adipose tissue formation at 3months postoperatively. Our results indicate that DSAF co-cultured with hASCs and HUVECs is a promising platform for vascularized soft tissue flap engineering. This platform is not limited by the flap size, as the entire construct can be immediately perfused by the recellularized vascular network following simple re-integration into the host using conventional microsurgical techniques. STATEMENT OF SIGNIFICANCE Significant soft tissue loss resulting from traumatic injury or tumor resection often requires surgical reconstruction using autologous soft tissue flaps. However, the limited availability of qualitative autologous flaps as well as the donor site morbidity significantly limits this approach. Engineered soft tissue flap grafts may offer a clinically relevant alternative to the autologous flap tissue. In this study, we engineered vascularized soft tissue free flap by using skin/adipose flap extracellular matrix scaffold (DSAF) in combination with multiple types of human cells. Following vascular reanastomosis in the recipient site, the engineered products successful regenerated large-scale fat tissue in vivo. This approach may provide a translatable platform for composite soft tissue free flap engineering for microsurgical reconstruction.
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48
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Mathematical Modeling of Therapy-induced Cancer Drug Resistance: Connecting Cancer Mechanisms to Population Survival Rates. Sci Rep 2016; 6:22498. [PMID: 26928089 PMCID: PMC4772546 DOI: 10.1038/srep22498] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Accepted: 02/16/2016] [Indexed: 12/21/2022] Open
Abstract
Drug resistance significantly limits the long-term effectiveness of targeted therapeutics for cancer patients. Recent experimental studies have demonstrated that cancer cell heterogeneity and microenvironment adaptations to targeted therapy play important roles in promoting the rapid acquisition of drug resistance and in increasing cancer metastasis. The systematic development of effective therapeutics to overcome drug resistance mechanisms poses a major challenge. In this study, we used a modeling approach to connect cellular mechanisms underlying cancer drug resistance to population-level patient survival. To predict progression-free survival in cancer patients with metastatic melanoma, we developed a set of stochastic differential equations to describe the dynamics of heterogeneous cell populations while taking into account micro-environment adaptations. Clinical data on survival and circulating tumor cell DNA (ctDNA) concentrations were used to confirm the effectiveness of our model. Moreover, our model predicted distinct patterns of dose-dependent synergy when evaluating a combination of BRAF and MEK inhibitors versus a combination of BRAF and PI3K inhibitors. These predictions were consistent with the findings in previously reported studies. The impact of the drug metabolism rate on patient survival was also discussed. The proposed model might facilitate the quantitative evaluation and optimization of combination therapeutics and cancer clinical trial design.
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49
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Li J, Li S. Multiscale models of compact bone. INT J BIOMATH 2016. [DOI: 10.1142/s1793524516500479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This work is concerned about multiscale models of compact bone. We focus on the lacuna–canalicular system. The interstitial fluid and the ions in it are regarded as solvent and others are treated as solute. The system has the characteristic of solvation process as well as non-equilibrium dynamics. The differential geometry theory of surfaces is adopted. We use this theory to separate the macroscopic domain of solvent from the microscopic domain of solute. We also use it to couple continuum and discrete descriptions. The energy functionals are constructed and then the variational principle is applied to the energy functionals so as to derive desirable governing equations. We consider both long-range polar interactions and short-range nonpolar interactions. The solution of governing equations leads to the minimization of the total energy.
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Affiliation(s)
- Junfeng Li
- School of Mathematics and Statistics, Central China Normal University, Wuhan 430079, P. R. China
| | - Shugang Li
- School of Mathematics and Statistics, Central China Normal University, Wuhan 430079, P. R. China
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50
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Holmes B, Bulusu K, Plesniak M, Zhang LG. A synergistic approach to the design, fabrication and evaluation of 3D printed micro and nano featured scaffolds for vascularized bone tissue repair. NANOTECHNOLOGY 2016; 27:064001. [PMID: 26758780 PMCID: PMC5055473 DOI: 10.1088/0957-4484/27/6/064001] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
3D bioprinting has begun to show great promise in advancing the development of functional tissue/organ replacements. However, to realize the true potential of 3D bioprinted tissues for clinical use requires the fabrication of an interconnected and effective vascular network. Solving this challenge is critical, as human tissue relies on an adequate network of blood vessels to transport oxygen, nutrients, other chemicals, biological factors and waste, in and out of the tissue. Here, we have successfully designed and printed a series of novel 3D bone scaffolds with both bone formation supporting structures and highly interconnected 3D microvascular mimicking channels, for efficient and enhanced osteogenic bone regeneration as well as vascular cell growth. Using a chemical functionalization process, we have conjugated our samples with nano hydroxyapatite (nHA), for the creation of novel micro and nano featured devices for vascularized bone growth. We evaluated our scaffolds with mechanical testing, hydrodynamic measurements and in vitro human mesenchymal stem cell (hMSC) adhesion (4 h), proliferation (1, 3 and 5 d) and osteogenic differentiation (1, 2 and 3 weeks). These tests confirmed bone-like physical properties and vascular-like flow profiles, as well as demonstrated enhanced hMSC adhesion, proliferation and osteogenic differentiation. Additional in vitro experiments with human umbilical vein endothelial cells also demonstrated improved vascular cell growth, migration and organization on micro-nano featured scaffolds.
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Affiliation(s)
- Benjamin Holmes
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington DC 20052, USA
| | - Kartik Bulusu
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington DC 20052, USA
| | - Michael Plesniak
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington DC 20052, USA
| | - Lijie Grace Zhang
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington DC 20052, USA
- Department of Biomedical Engineering, The George Washington University, Washington DC 20052, USA
- Division of Genomic Medicine, Department of Medicine, The George Washington University Medical Center, Washington DC 20052, USA
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