1
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Wang F, Song P, Wang J, Wang S, Liu Y, Bai L, Su J. Organoid bioinks: construction and application. Biofabrication 2024; 16:032006. [PMID: 38697093 DOI: 10.1088/1758-5090/ad467c] [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: 11/23/2023] [Accepted: 05/02/2024] [Indexed: 05/04/2024]
Abstract
Organoids have emerged as crucial platforms in tissue engineering and regenerative medicine but confront challenges in faithfully mimicking native tissue structures and functions. Bioprinting technologies offer a significant advancement, especially when combined with organoid bioinks-engineered formulations designed to encapsulate both the architectural and functional elements of specific tissues. This review provides a rigorous, focused examination of the evolution and impact of organoid bioprinting. It emphasizes the role of organoid bioinks that integrate key cellular components and microenvironmental cues to more accurately replicate native tissue complexity. Furthermore, this review anticipates a transformative landscape invigorated by the integration of artificial intelligence with bioprinting techniques. Such fusion promises to refine organoid bioink formulations and optimize bioprinting parameters, thus catalyzing unprecedented advancements in regenerative medicine. In summary, this review accentuates the pivotal role and transformative potential of organoid bioinks and bioprinting in advancing regenerative therapies, deepening our understanding of organ development, and clarifying disease mechanisms.
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Affiliation(s)
- Fuxiao Wang
- Organoid Research Center, Institute of Translational Medicine, Shanghai University, Shanghai 200444, People's Republic of China
- National Center for Translational Medicine (Shanghai) SHU Branch, Shanghai University, Shanghai 200444, People's Republic of China
- These authors contributed equally
| | - Peiran Song
- Organoid Research Center, Institute of Translational Medicine, Shanghai University, Shanghai 200444, People's Republic of China
- National Center for Translational Medicine (Shanghai) SHU Branch, Shanghai University, Shanghai 200444, People's Republic of China
- These authors contributed equally
| | - Jian Wang
- Organoid Research Center, Institute of Translational Medicine, Shanghai University, Shanghai 200444, People's Republic of China
- National Center for Translational Medicine (Shanghai) SHU Branch, Shanghai University, Shanghai 200444, People's Republic of China
- These authors contributed equally
| | - Sicheng Wang
- Organoid Research Center, Institute of Translational Medicine, Shanghai University, Shanghai 200444, People's Republic of China
- National Center for Translational Medicine (Shanghai) SHU Branch, Shanghai University, Shanghai 200444, People's Republic of China
- Department of Orthopedics, Shanghai Zhongye Hospital, Shanghai 200444, People's Republic of China
| | - Yuanyuan Liu
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, People's Republic of China
| | - Long Bai
- Organoid Research Center, Institute of Translational Medicine, Shanghai University, Shanghai 200444, People's Republic of China
- National Center for Translational Medicine (Shanghai) SHU Branch, Shanghai University, Shanghai 200444, People's Republic of China
- Wenzhou Institute of Shanghai University, Wenzhou 325000, People's Republic of China
| | - Jiacan Su
- Organoid Research Center, Institute of Translational Medicine, Shanghai University, Shanghai 200444, People's Republic of China
- Department of Orthopedics, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, People's Republic of China
- National Center for Translational Medicine (Shanghai) SHU Branch, Shanghai University, Shanghai 200444, People's Republic of China
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Wang J, Wu Y, Li G, Zhou F, Wu X, Wang M, Liu X, Tang H, Bai L, Geng Z, Song P, Shi Z, Ren X, Su J. Engineering Large-Scale Self-Mineralizing Bone Organoids with Bone Matrix-Inspired Hydroxyapatite Hybrid Bioinks. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2309875. [PMID: 38642033 DOI: 10.1002/adma.202309875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 04/02/2024] [Indexed: 04/22/2024]
Abstract
Addressing large bone defects remains a significant challenge owing to the inherent limitations in self-healing capabilities, resulting in prolonged recovery and suboptimal regeneration. Although current clinical solutions are available, they have notable shortcomings, necessitating more efficacious approaches to bone regeneration. Organoids derived from stem cells show great potential in this field; however, the development of bone organoids has been hindered by specific demands, including the need for robust mechanical support provided by scaffolds and hybrid extracellular matrices (ECM). In this context, bioprinting technologies have emerged as powerful means of replicating the complex architecture of bone tissue. The research focused on the fabrication of a highly intricate bone ECM analog using a novel bioink composed of gelatin methacrylate/alginate methacrylate/hydroxyapatite (GelMA/AlgMA/HAP). Bioprinted scaffolds facilitate the long-term cultivation and progressive maturation of extensive bioprinted bone organoids, foster multicellular differentiation, and offer valuable insights into the initial stages of bone formation. The intrinsic self-mineralizing quality of the bioink closely emulates the properties of natural bone, empowering organoids with enhanced bone repair for both in vitro and in vivo applications. This trailblazing investigation propels the field of bone tissue engineering and holds significant promise for its translation into practical applications.
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Affiliation(s)
- Jian Wang
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
- School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
- Department of Orthopedic, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, P. R. China
| | - Yan Wu
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
| | - Guangfeng Li
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
- School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
- Department of Trauma Orthopedics, Zhongye Hospital, Shanghai, 200941, P. R. China
| | - Fengjin Zhou
- Department of Orthopedics, Honghui Hospital, Xi'an Jiao Tong University, Xi'an, 710000, P. R. China
| | - Xiang Wu
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
- School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Miaomiao Wang
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
- School of Medicine, Shanghai University, Shanghai, 200444, P. R. China
| | - Xinru Liu
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
| | - Hua Tang
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
| | - Long Bai
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
| | - Zhen Geng
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
| | - Peiran Song
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
| | - Zhongmin Shi
- Department of Orthopedic Surgery, Shanghai Sixth People's Hospital, Shanghai, 200233, P. R. China
| | - Xiaoxiang Ren
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
| | - Jiacan Su
- Institute of Translational Medicine, Musculoskeletal Organoid Research Center, National Center for Translational Medicine SHU Branch, Shanghai University, Shanghai, 200444, P. R. China
- Department of Orthopedic, Xin Hua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, P. R. China
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3
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Fois MG, van Griensven M, Giselbrecht S, Habibović P, Truckenmüller RK, Tahmasebi Birgani ZN. Mini-bones: miniaturized bone in vitro models. Trends Biotechnol 2024:S0167-7799(24)00004-0. [PMID: 38493050 DOI: 10.1016/j.tibtech.2024.01.004] [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: 11/11/2023] [Revised: 01/17/2024] [Accepted: 01/18/2024] [Indexed: 03/18/2024]
Abstract
In bone tissue engineering (TE) and regeneration, miniaturized, (sub)millimeter-sized bone models have become a popular trend since they bring about physiological biomimicry, precise orchestration of concurrent stimuli, and compatibility with high-throughput setups and high-content imaging. They also allow efficient use of cells, reagents, materials, and energy. In this review, we describe the state of the art of miniaturized in vitro bone models, or 'mini-bones', describing these models based on their characteristics of (multi)cellularity and engineered extracellular matrix (ECM), and elaborating on miniaturization approaches and fabrication techniques. We analyze the performance of 'mini-bone' models according to their applications for studying basic bone biology or as regeneration models, disease models, and screening platforms, and provide an outlook on future trends, challenges, and opportunities.
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Affiliation(s)
- Maria Gabriella Fois
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, PO Box 616, 6200, MD, Maastricht, The Netherlands
| | - Martijn van Griensven
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, PO Box 616, 6200, MD, Maastricht, The Netherlands
| | - Stefan Giselbrecht
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, PO Box 616, 6200, MD, Maastricht, The Netherlands
| | - Pamela Habibović
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, PO Box 616, 6200, MD, Maastricht, The Netherlands
| | - Roman K Truckenmüller
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, PO Box 616, 6200, MD, Maastricht, The Netherlands.
| | - Zeinab Niloofar Tahmasebi Birgani
- MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, PO Box 616, 6200, MD, Maastricht, The Netherlands.
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Yun C, Kim SH, Kim KM, Yang MH, Byun MR, Kim JH, Kwon D, Pham HTM, Kim HS, Kim JH, Jung YS. Advantages of Using 3D Spheroid Culture Systems in Toxicological and Pharmacological Assessment for Osteogenesis Research. Int J Mol Sci 2024; 25:2512. [PMID: 38473760 DOI: 10.3390/ijms25052512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 02/19/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024] Open
Abstract
Bone differentiation is crucial for skeletal development and maintenance. Its dysfunction can cause various pathological conditions such as rickets, osteoporosis, osteogenesis imperfecta, or Paget's disease. Although traditional two-dimensional cell culture systems have contributed significantly to our understanding of bone biology, they fail to replicate the intricate biotic environment of bone tissue. Three-dimensional (3D) spheroid cell cultures have gained widespread popularity for addressing bone defects. This review highlights the advantages of employing 3D culture systems to investigate bone differentiation. It highlights their capacity to mimic the complex in vivo environment and crucial cellular interactions pivotal to bone homeostasis. The exploration of 3D culture models in bone research offers enhanced physiological relevance, improved predictive capabilities, and reduced reliance on animal models, which have contributed to the advancement of safer and more effective strategies for drug development. Studies have highlighted the transformative potential of 3D culture systems for expanding our understanding of bone biology and developing targeted therapeutic interventions for bone-related disorders. This review explores how 3D culture systems have demonstrated promise in unraveling the intricate mechanisms governing bone homeostasis and responses to pharmacological agents.
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Affiliation(s)
- Chawon Yun
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Sou Hyun Kim
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Kyung Mok Kim
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Min Hye Yang
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
| | - Mi Ran Byun
- College of Pharmacy, Daegu Catholic University, Gyeongsan 38430, Republic of Korea
| | - Joung-Hee Kim
- Department of Medical Beauty Care, Dongguk University Wise, Gyeongju 38066, Republic of Korea
| | - Doyoung Kwon
- Jeju Research Institute of Pharmaceutical Sciences, College of Pharmacy, Jeju National University, Jeju 63243, Republic of Korea
| | - Huyen T M Pham
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea
| | - Hyo-Sop Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea
| | - Jae-Ho Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea
| | - Young-Suk Jung
- Department of Pharmacy, Research Institute for Drug Development, College of Pharmacy, Pusan National University, Busan 46241, Republic of Korea
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de Leeuw AM, Graf R, Lim PJ, Zhang J, Schädli GN, Peterhans S, Rohrbach M, Giunta C, Rüger M, Rubert M, Müller R. Physiological cell bioprinting density in human bone-derived cell-laden scaffolds enhances matrix mineralization rate and stiffness under dynamic loading. Front Bioeng Biotechnol 2024; 12:1310289. [PMID: 38419730 PMCID: PMC10900528 DOI: 10.3389/fbioe.2024.1310289] [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: 10/09/2023] [Accepted: 01/30/2024] [Indexed: 03/02/2024] Open
Abstract
Human organotypic bone models are an emerging technology that replicate bone physiology and mechanobiology for comprehensive in vitro experimentation over prolonged periods of time. Recently, we introduced a mineralized bone model based on 3D bioprinted cell-laden alginate-gelatin-graphene oxide hydrogels cultured under dynamic loading using commercially available human mesenchymal stem cells. In the present study, we created cell-laden scaffolds from primary human osteoblasts isolated from surgical waste material and investigated the effects of a previously reported optimal cell printing density (5 × 106 cells/mL bioink) vs. a higher physiological cell density (10 × 106 cells/mL bioink). We studied mineral formation, scaffold stiffness, and cell morphology over a 10-week period to determine culture conditions for primary human bone cells in this microenvironment. For analysis, the human bone-derived cell-laden scaffolds underwent multiscale assessment at specific timepoints. High cell viability was observed in both groups after bioprinting (>90%) and after 2 weeks of daily mechanical loading (>85%). Bioprinting at a higher cell density resulted in faster mineral formation rates, higher mineral densities and remarkably a 10-fold increase in stiffness compared to a modest 2-fold increase in the lower printing density group. In addition, physiological cell bioprinting densities positively impacted cell spreading and formation of dendritic interconnections. We conclude that our methodology of processing patient-specific human bone cells, subsequent biofabrication and dynamic culturing reliably affords mineralized cell-laden scaffolds. In the future, in vitro systems based on patient-derived cells could be applied to study the individual phenotype of bone disorders such as osteogenesis imperfecta and aid clinical decision making.
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Affiliation(s)
| | - Reto Graf
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Pei Jin Lim
- Connective Tissue Unit, Division of Metabolism and Children's Research Center, University Children's Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Jianhua Zhang
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | | | | | - Marianne Rohrbach
- Connective Tissue Unit, Division of Metabolism and Children's Research Center, University Children's Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Cecilia Giunta
- Connective Tissue Unit, Division of Metabolism and Children's Research Center, University Children's Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Matthias Rüger
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
- Department of Pediatric Orthopaedics and Traumatology, University Children's Hospital Zurich, Zurich, Switzerland
| | - Marina Rubert
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Ralph Müller
- Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
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Li J, Yang Y, Sun Z, Peng K, Liu K, Xu P, Li J, Wei X, He X. Integrated evaluation of biomechanical and biological properties of the biomimetic structural bone scaffold: Biomechanics, simulation analysis, and osteogenesis. Mater Today Bio 2024; 24:100934. [PMID: 38234458 PMCID: PMC10792490 DOI: 10.1016/j.mtbio.2023.100934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 12/22/2023] [Accepted: 12/27/2023] [Indexed: 01/19/2024] Open
Abstract
A porous structure is essential for bone implants because it increases the bone ingrowth space and improves mechanical and biological properties. The biomimetically designed porous Voronoi scaffold can reconstruct the structure and function of cancellous bone; however, its comprehensive properties need to be investigated further. In this study, algorithms based on scaling factors were used to design the Voronoi scaffolds. Classic approaches, such as computer-aided design and the implicit surface method, have been used to design Diamond, Gyroid, and I-WP scaffolds as controls. All scaffolds were prepared by selective laser melting of titanium alloys and three-dimensional printing. Mechanical tests, finite element analysis, and in vitro and in vivo experiments were performed to investigate the biomechanical, cytologic, and osteogenic performance of the scaffolds, while computational fluid dynamics simulations were used to explore the underlying mechanisms. Diamond scaffolds have a better loading capacity, and the mechanical behaviors and fluid flow of Voronoi scaffolds are similar to those of the human trabecular bone. Cells showed more proliferation and distribution on the Diamond and Voronoi scaffolds and exhibited evident differentiation on Gyroid and Voronoi scaffolds. Bone formation was apparent on the inner part of the Gyroid, the outer part of the I-WP, and the entire Diamond and Voronoi scaffolds. The hydrodynamic properties and stimulus response of cells influenced by the porous structure account for the varied biological performance of the scaffolds. The Voronoi scaffolds with bionic mechanical behavior and an appropriate hydrodynamic response exhibit evident cell growth and osteogenesis, making them preferable for porous structural bone implants.
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Affiliation(s)
- Jialiang Li
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, 710014, China
| | - Yubing Yang
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710000, China
| | - Zhongwei Sun
- Jiangsu Key Laboratory of Engineering Mechanics, School of Civil Engineering, Southeast University, Nanjing, 210096, China
| | - Kan Peng
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, 710014, China
| | - Kaixin Liu
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, 710014, China
| | - Peng Xu
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, 710014, China
| | - Jun Li
- Honghui Hospital, Xi'an Jiaotong University, Xi'an, 710014, China
| | - Xinyu Wei
- Department of Health Management, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710000, China
| | - Xijing He
- Department of Orthopedics, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710000, China
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7
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Gehre C, Qiu W, Klaus Jäger P, Wang X, Marques FC, Nelson BJ, Müller R, Qin XH. Guiding bone cell network formation in 3D via photosensitized two-photon ablation. Acta Biomater 2024; 174:141-152. [PMID: 38061678 DOI: 10.1016/j.actbio.2023.11.042] [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: 07/15/2023] [Revised: 11/27/2023] [Accepted: 11/30/2023] [Indexed: 12/18/2023]
Abstract
A long-standing challenge in skeletal tissue engineering is to reconstruct a three-dimensionally (3D) interconnected bone cell network in vitro that mimics the native bone microarchitecture. While conventional hydrogels are extensively used in studying bone cell behavior in vitro, current techniques lack the precision to manipulate the complex pericellular environment found in bone. The goal of this study is to guide single bone cells to form a 3D network in vitro via photosensitized two-photon ablation of microchannels in gelatin methacryloyl (GelMA) hydrogels. A water-soluble two-photon photosensitizer (P2CK) was added to soft GelMA hydrogels to enhance the ablation efficiency. Remarkably, adding 0.5 mM P2CK reduced the energy dosage threshold five-fold compared to untreated controls, enabling more cell-compatible ablation. By employing low-energy ablation (100 J/cm2) with a grid pattern of 1 µm wide and 30 µm deep microchannels, we induced dendritic outgrowth in human mesenchymal stem cells (hMSC). After 7 days, the cells successfully utilized the microchannels and formed a 3D network. Our findings reveal that cellular viability after low-energy ablation was comparable to unablated controls, whereas high-energy ablation (500 J/cm2) resulted in 42 % cell death. Low-energy grid ablation significantly promoted network formation and >40 µm long protrusion outgrowth. While the broad-spectrum matrix metalloproteinase inhibitor (GM6001) reduced cell spreading by inhibiting matrix degradation, cells invaded the microchannel grid with long protrusions. Collectively, these results emphasize the potential of photosensitized two-photon hydrogel ablation as a high-precision tool for laser-guided biofabrication of 3D cellular networks in vitro. STATEMENT OF SIGNIFICANCE: The inaccessible nature of osteocyte networks in bones renders fundamental research on skeletal biology a major challenge. This limit is partly due to the lack of high-resolution tools that can manipulate the pericellular environment in 3D cultures in vitro. To create bone-like cellular networks, we employ a two-photon laser in combination with a two-photon sensitizer to erode microchannels with low laser dosages into GelMA hydrogels. By providing a grid of microchannels, the cells self-organized into a 3D interconnected network within days. Laser-guided formation of 3D networks from single cells at micron-scale resolution is demonstrated for the first time. In future, we envisage in vitro generation of bone cell networks with user-dictated morphologies for both fundamental and translational bone research.
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Affiliation(s)
| | - Wanwan Qiu
- Institute for Biomechanics, ETH Zurich, Zürich, Switzerland
| | | | - Xiaopu Wang
- Institute of Robotics and Intelligent Systems, Zürich, Switzerland
| | | | - Bradley J Nelson
- Institute of Robotics and Intelligent Systems, Zürich, Switzerland
| | - Ralph Müller
- Institute for Biomechanics, ETH Zurich, Zürich, Switzerland
| | - Xiao-Hua Qin
- Institute for Biomechanics, ETH Zurich, Zürich, Switzerland.
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8
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Luo Q, Shang K, Zhu J, Wu Z, Cao T, Ahmed AAQ, Huang C, Xiao L. Biomimetic cell culture for cell adhesive propagation for tissue engineering strategies. MATERIALS HORIZONS 2023; 10:4662-4685. [PMID: 37705440 DOI: 10.1039/d3mh00849e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
Biomimetic cell culture, which involves creating a biomimetic microenvironment for cells in vitro by engineering approaches, has aroused increasing interest given that it maintains the normal cellular phenotype, genotype and functions displayed in vivo. Therefore, it can provide a more precise platform for disease modelling, drug development and regenerative medicine than the conventional plate cell culture. In this review, initially, we discuss the principle of biomimetic cell culture in terms of the spatial microenvironment, chemical microenvironment, and physical microenvironment. Then, the main strategies of biomimetic cell culture and their state-of-the-art progress are summarized. To create a biomimetic microenvironment for cells, a variety of strategies has been developed, ranging from conventional scaffold strategies, such as macroscopic scaffolds, microcarriers, and microgels, to emerging scaffold-free strategies, such as spheroids, organoids, and assembloids, to simulate the native cellular microenvironment. Recently, 3D bioprinting and microfluidic chip technology have been applied as integrative platforms to obtain more complex biomimetic structures. Finally, the challenges in this area are discussed and future directions are discussed to shed some light on the community.
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Affiliation(s)
- Qiuchen Luo
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China.
| | - Keyuan Shang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China.
| | - Jing Zhu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China.
| | - Zhaoying Wu
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China.
| | - Tiefeng Cao
- Department of Gynaecology, First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510070, China
| | - Abeer Ahmed Qaed Ahmed
- Department of Molecular Medicine, Biochemistry Unit, University of Pavia, 27100 Pavia, Italy
| | - Chixiang Huang
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China.
| | - Lin Xiao
- School of Biomedical Engineering, Shenzhen Campus of Sun Yat-Sen University, Shenzhen 518107, China.
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9
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Qing J, Guo Q, Lv L, Zhang X, Liu Y, Heng BC, Li Z, Zhang P, Zhou Y. Organoid Culture Development for Skeletal Systems. TISSUE ENGINEERING. PART B, REVIEWS 2023; 29:545-557. [PMID: 37183418 DOI: 10.1089/ten.teb.2023.0022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Organoids are widely considered to be ideal in vitro models that have been widely applied in many fields, including regenerative medicine, disease research and drug screening. It is distinguished from other three-dimensional in vitro culture model systems by self-organization and sustainability in long-term culture. The three core components of organoid culture are cells, exogenous factors, and culture matrix. Due to the complexity of bone tissue, and heterogeneity of osteogenic stem/progenitor cells, it is challenging to construct organoids for modeling skeletal systems. In this study, we examine current progress in the development of skeletal system organoid culture systems and analyze the current research status of skeletal stem cells, their microenvironmental factors, and various potential organoid culture matrix candidates to provide cues for future research trajectory in this field. Impact Statement The emergence of organoids has brought new opportunities for the development of many biomedical fields. The bone organoid field still has much room for exploration. This review discusses the characteristics distinguishing organoids from other three-dimensional model systems and examines current progress in the organoid production of skeletal systems. In addition, based on core elements of organoid cultures, three main problems that need to be solved in bone organoid generation are further analyzed. These include the heterogeneity of skeletal stem cells, their microenvironmental factors, and potential organoid culture matrix candidates. This information provides direction for the future research of bone organoids.
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Affiliation(s)
- Jia Qing
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, China
| | - Qian Guo
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, China
| | - Longwei Lv
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, China
| | - Xiao Zhang
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, China
| | - Yunsong Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, China
| | - Boon Chin Heng
- The Central Laboratory, Peking University School and Hospital of Stomatology, Beijing, China
| | - Zheng Li
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, China
| | - Ping Zhang
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, China
| | - Yongsheng Zhou
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing, China
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10
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de Wildt BWM, Cuypers LAB, Cramer EEA, Wentzel AS, Ito K, Hofmann S. The Impact of Culture Variables on a 3D Human In Vitro Bone Remodeling Model: A Design of Experiments Approach. Adv Healthc Mater 2023; 12:e2301205. [PMID: 37405830 DOI: 10.1002/adhm.202301205] [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: 04/17/2023] [Revised: 06/20/2023] [Accepted: 06/22/2023] [Indexed: 07/06/2023]
Abstract
Human in vitro bone remodeling models, using osteoclast-osteoblast cocultures, can facilitate the investigation of human bone remodeling while reducing the need for animal experiments. Although current in vitro osteoclast-osteoblast cocultures have improved the understanding of bone remodeling, it is still unknown which culture conditions support both cell types. Therefore, in vitro bone remodeling models can benefit from a thorough evaluation of the impact of culture variables on bone turnover outcomes, with the aim to reach balanced osteoclast and osteoblast activity, mimicking healthy bone remodeling. Using a resolution III fractional factorial design, the main effects of commonly used culture variables on bone turnover markers in an in vitro human bone remodeling model are identified. This model is able to capture physiological quantitative resorption-formation coupling along all conditions. Culture conditions of two runs show promising results: conditions of one run can be used as a high bone turnover system and conditions of another run as a self-regulating system as the addition of osteoclastic and osteogenic differentiation factors is not required for remodeling. The results generated with this in vitro model allow for better translation between in vitro studies and in vivo studies, toward improved preclinical bone remodeling drug development.
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Affiliation(s)
- Bregje W M de Wildt
- Orthopaedic Biomechanics and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
| | - Lizzy A B Cuypers
- Orthopaedic Biomechanics and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
- Department of Regenerative Biomaterials, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, P.O. Box 9101, Nijmegen, 6525 GA, The Netherlands
| | - Esther E A Cramer
- Orthopaedic Biomechanics and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
| | - Annelieke S Wentzel
- Orthopaedic Biomechanics and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
| | - Keita Ito
- Orthopaedic Biomechanics and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
| | - Sandra Hofmann
- Orthopaedic Biomechanics and Institute for Complex Molecular Systems (ICMS), Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, Eindhoven, 5600 MB, The Netherlands
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11
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Kim MK, Paek K, Woo SM, Kim JA. Bone-on-a-Chip: Biomimetic Models Based on Microfluidic Technologies for Biomedical Applications. ACS Biomater Sci Eng 2023. [PMID: 37183366 DOI: 10.1021/acsbiomaterials.3c00066] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
With the increasing importance of preclinical evaluation of newly developed drugs or treatments, in vitro organ or disease models are necessary. Although various organ-specific on-chip (organ-on-a-chip, or OOC) systems have been developed as emerging in vitro models, bone-on-a-chip (BOC) systems that recapitulate the bone microenvironment have been less developed or reviewed compared with other OOCs. The bone is one of the most dynamic organs and undergoes continuous remodeling throughout its lifetime. The aging population is growing worldwide, and healthcare costs are rising rapidly. Since in vitro BOC models that recapitulate native bone niches and pathological features can be important for studying the underlying mechanism of orthopedic diseases and predicting drug responses in preclinical trials instead of in animals, the development of biomimetic BOCs with high efficiency and fidelity will be accelerated further. Here, we review recently engineered BOCs developed using various microfluidic technologies and investigate their use to model the bone microenvironment. We have also explored various biomimetic strategies based on biological, geometrical, and biomechanical cues for biomedical applications of BOCs. Finally, we addressed the limitations and challenging issues of current BOCs that should be overcome to obtain more acceptable BOCs in the biomedical and pharmaceutical industries.
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Affiliation(s)
- Min Kyeong Kim
- Center for Scientific Instrumentation, Korea Basic Science Institute, Cheongju 28119, Republic of Korea
| | - Kyurim Paek
- Center for Scientific Instrumentation, Korea Basic Science Institute, Cheongju 28119, Republic of Korea
- Program in Biomicro System Technology, Korea University, Seoul 02841, Republic of Korea
| | - Sang-Mi Woo
- Center for Scientific Instrumentation, Korea Basic Science Institute, Cheongju 28119, Republic of Korea
| | - Jeong Ah Kim
- Center for Scientific Instrumentation, Korea Basic Science Institute, Cheongju 28119, Republic of Korea
- Department of Bio-Analytical Science, University of Science and Technology, Daejeon 34113, Republic of Korea
- Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06973, Republic of Korea
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12
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Gao L, Liu G, Wu X, Liu C, Wang Y, Ma M, Ma Y, Hao Z. Osteocytes autophagy mediated by mTORC2 activation controls osteoblasts differentiation and osteoclasts activities under mechanical loading. Arch Biochem Biophys 2023; 742:109634. [PMID: 37164247 DOI: 10.1016/j.abb.2023.109634] [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: 01/17/2023] [Revised: 04/01/2023] [Accepted: 05/07/2023] [Indexed: 05/12/2023]
Abstract
Autophagy is an important mechanosensitive response for cellular homeostasis and survival in osteocytes. However, the mechanism and its effect on bone metabolism have not yet clarified. The objective of this study was to evaluate how compressive cyclic force (CCF) induced autophagic response in osteocytes and to determine the effect of mechanically induced-autophagy on bone cells including osteocytes, osteoblasts, and osteoclasts. Autophagic puncta observed in MLO-Y4 cells increased after exposure to CCF. The upregulated levels of the LC3-II isoform and the degradation of p62 further confirmed the increased autophagic flux. Additionally, ATP synthesis and release, osteocalcin (OCN) expression, and cell survival increased in osteocytes as well. The Murine osteoblasts MC3T3-E1 cells and RAW 264.7 macrophage cells were cultured in conditioned medium collected from MLO-Y4 cells subjected to CCF. The concentration of FGF23 increased and the concentrations of SOST and M-CSF and RANKL/OPG ratio decreased significantly in the conditioned medium. Moreover, the promotion of osteogenic differentiation in MC3T3-E1 cells and inhibition of osteoclastogenesis and function in RAW 264.7 cells were significantly attenuated when osteocytes autophagy was inhibited by siAtg7. Our findings suggested that CCF induced protective autophagy in osteocytes and subsequently enhanced osteocytes survival and osteoblasts differentiation and downregulated osteoclasts activities. Further study revealed that CCF induced autophagic response in osteocytes through mechanistic target of rapamycin complex 2 (mTORC2) activation. In conclusion, CCF-induced osteocytes autophagy upon mTORC2 activation promoted osteocytes survival and osteogenic response and decreased osteoclastic function. Thus, osteocytes autophagy will provide a promising target for better understanding of bone physiology and treatment of bone diseases.
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Affiliation(s)
- Li Gao
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, 510055, China
| | - Gen Liu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, 510055, China
| | - Xiangnan Wu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, 510055, China
| | - Chuanzi Liu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, 510055, China
| | - Yiqiao Wang
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, 510055, China
| | - Meirui Ma
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, 510055, China
| | - Yuanyuan Ma
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, 510055, China.
| | - Zhichao Hao
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou, 510055, China.
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13
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Knowles HJ, Chanalaris A, Koutsikouni A, Cribbs AP, Grover LM, Hulley PA. Mature primary human osteocytes in mini organotypic cultures secrete FGF23 and PTH1-34-regulated sclerostin. Front Endocrinol (Lausanne) 2023; 14:1167734. [PMID: 37223031 PMCID: PMC10200954 DOI: 10.3389/fendo.2023.1167734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 04/03/2023] [Indexed: 05/25/2023] Open
Abstract
Introduction For decades, functional primary human osteocyte cultures have been crucially needed for understanding their role in bone anabolic processes and in endocrine phosphate regulation via the bone-kidney axis. Mature osteocyte proteins (sclerostin, DMP1, Phex and FGF23) play a key role in various systemic diseases and are targeted by successful bone anabolic drugs (anti-sclerostin antibody and teriparatide (PTH1-34)). However, cell lines available to study osteocytes produce very little sclerostin and low levels of mature osteocyte markers. We have developed a primary human 3D organotypic culture system that replicates the formation of mature osteocytes in bone. Methods Primary human osteoblasts were seeded in a fibrinogen / thrombin gel around 3D-printed hanging posts. Following contraction of the gel around the posts, cells were cultured in osteogenic media and conditioned media was collected for analysis of secreted markers of osteocyte formation. Results The organoids were viable for at least 6 months, allowing co-culture with different cell types and testing of bone anabolic drugs. Bulk RNAseq data displayed the developing marker trajectory of ossification and human primary osteocyte formation in vitro over an initial 8- week period. Vitamin D3 supplementation increased mineralization and sclerostin secretion, while hypoxia and PTH1-34 modulated sclerostin. Our culture system also secreted FGF23, enabling the future development of a bone-kidney-parathyroid-vascular multi-organoid or organ-on-a-chip system to study disease processes and drug effects using purely human cells. Discussion This 3D organotypic culture system provides a stable, long-lived, and regulated population of mature human primary osteocytes for a variety of research applications.
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Affiliation(s)
- Helen J. Knowles
- Botnar Institute for Musculoskeletal Sciences, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Anastasios Chanalaris
- Botnar Institute for Musculoskeletal Sciences, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Argyro Koutsikouni
- School of Biology, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Adam P. Cribbs
- Botnar Institute for Musculoskeletal Sciences, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
- Oxford Centre for Translational Myeloma Research, Botnar Institute for Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Liam M. Grover
- Healthcare Technologies Institute, School of Chemical Engineering, University of Birmingham, Birmingham, United Kingdom
| | - Philippa A. Hulley
- Botnar Institute for Musculoskeletal Sciences, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
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14
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de Wildt BWM, Zhao F, Lauwers I, van Rietbergen B, Ito K, Hofmann S. Characterization of three-dimensional bone-like tissue growth and organization under influence of directional fluid flow. Biotechnol Bioeng 2023. [PMID: 37148472 DOI: 10.1002/bit.28418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 02/04/2023] [Accepted: 04/25/2023] [Indexed: 05/08/2023]
Abstract
The transition in the field of bone tissue engineering from bone regeneration to in vitro models has come with the challenge of recreating a dense and anisotropic bone-like extracellular matrix (ECM). Although the mechanism by which bone ECM gains its structure is not fully understood, mechanical loading and curvature have been identified as potential contributors. Here, guided by computational simulations, we evaluated cell and bone-like tissue growth and organization in a concave channel with and without directional fluid flow stimulation. Human mesenchymal stromal cells were seeded on donut-shaped silk fibroin scaffolds and osteogenically stimulated for 42 days statically or in a flow perfusion bioreactor. After 14, 28, and 42 days, constructs were investigated for cell and tissue growth and organization. As a result, directional fluid flow was able to improve organic tissue growth but not organization. Cells tended to orient in the tangential direction of the channel, possibly attributed to its curvature. Based on our results, we suggest that organic ECM production but not anisotropy can be stimulated through the application of fluid flow. With this study, an initial attempt in three-dimensions was made to improve the resemblance of in vitro produced bone-like ECM to the physiological bone ECM.
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Affiliation(s)
- Bregje W M de Wildt
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Feihu Zhao
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Biomedical Engineering, Zienkiewicz Centre for Computational Engineering, Faculty of Science and Engineering, Swansea University, Swansea, UK
| | - Iris Lauwers
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Bert van Rietbergen
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Keita Ito
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Sandra Hofmann
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
- Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
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15
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de Wildt BWM, Cramer EEA, de Silva LS, Ito K, Gawlitta D, Hofmann S. Evaluating material-driven regeneration in a tissue engineered human in vitro bone defect model. Bone 2023; 166:116597. [PMID: 36280106 DOI: 10.1016/j.bone.2022.116597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/07/2022] [Accepted: 10/18/2022] [Indexed: 11/16/2022]
Abstract
Advanced in vitro human bone defect models can contribute to the evaluation of materials for in situ bone regeneration, addressing both translational and ethical concerns regarding animal models. In this study, we attempted to develop such a model to study material-driven regeneration, using a tissue engineering approach. By co-culturing human umbilical vein endothelial cells (HUVECs) with human bone marrow-derived mesenchymal stromal cells (hBMSCs) on silk fibroin scaffolds with in vitro critically sized defects, the growth of vascular-like networks and three-dimensional bone-like tissue was facilitated. After a model build-up phase of 28 days, materials were artificially implanted and HUVEC and hBMSC migration, cell-material interactions, and osteoinduction were evaluated 14 days after implantation. The materials physiologically relevant for bone regeneration included a platelet gel as blood clot mimic, cartilage spheres as soft callus mimics, and a fibrin gel as control. Although the in vitro model was limited in the evaluation of immune responses, hallmarks of physiological bone regeneration were observed in vitro. These included the endothelial cell chemotaxis induced by the blood clot mimic and the mineralization of the soft callus mimic. Therefore, the present in vitro model could contribute to an improved pre-clinical evaluation of biomaterials while reducing the need for animal experiments.
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Affiliation(s)
- Bregje W M de Wildt
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Esther E A Cramer
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Leanne S de Silva
- Department of Oral and Maxillofacial Surgery & Special Dental Care, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands; Regenerative Medicine Center Utrecht, Utrecht, the Netherlands
| | - Keita Ito
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, the Netherlands
| | - Debby Gawlitta
- Department of Oral and Maxillofacial Surgery & Special Dental Care, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands; Regenerative Medicine Center Utrecht, Utrecht, the Netherlands
| | - Sandra Hofmann
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Institute for Complex Molecular Systems (ICMS), Eindhoven University of Technology, Eindhoven, the Netherlands.
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16
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Babić Radić MM, Filipović VV, Vuković JS, Vukomanović M, Rubert M, Hofmann S, Müller R, Tomić SL. Bioactive Interpenetrating Hydrogel Networks Based on 2-Hydroxyethyl Methacrylate and Gelatin Intertwined with Alginate and Dopped with Apatite as Scaffolding Biomaterials. Polymers (Basel) 2022; 14:polym14153112. [PMID: 35956626 PMCID: PMC9370696 DOI: 10.3390/polym14153112] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 07/26/2022] [Accepted: 07/28/2022] [Indexed: 01/27/2023] Open
Abstract
Our goal was to create bioimitated scaffolding materials for biomedical purposes. The guiding idea was that we used an interpenetrating structural hierarchy of natural extracellular matrix as a “pattern” to design hydrogel scaffolds that show favorable properties for tissue regeneration. Polymeric hydrogel scaffolds are made in a simple, environmentally friendly way without additional functionalization. Gelatin and 2-hydroxyethyl methacrylate were selected to prepare interpenetrating polymeric networks and linear alginate chains were added as an interpenetrant to study their influence on the scaffold’s functionalities. Cryogelation and porogenation methods were used to obtain the designed scaffolding biomaterials. The scaffold’s structural, morphological, and mechanical properties, in vitro degradation, and cell viability properties were assessed to study the effects of the preparation method and alginate loading. Apatite as an inorganic agent was incorporated into cryogelated scaffolds to perform an extensive biological assay. Cryogelated scaffolds possess superior functionalities essential for tissue regeneration: fully hydrophilicity, degradability and mechanical features (2.08–9.75 MPa), and an optimal LDH activity. Furthermore, cryogelated scaffolds loaded with apatite showed good cell adhesion capacity, biocompatibility, and non-toxic behavior. All scaffolds performed equally in terms of metabolic activity and osteoconductivity. Cryogelated scaffolds with/without HAp could represent a new advance to promote osteoconductivity and enhance hard tissue repair. The obtained series of scaffolding biomaterials described here can provide a wide range of potential applications in the area of biomedical engineering.
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Affiliation(s)
- Marija M. Babić Radić
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia; (M.M.B.R.); (J.S.V.)
| | - Vuk V. Filipović
- University of Belgrade, Institute for Chemistry, Technology and Metallurgy, Njegoseva 12, 11000 Belgrade, Serbia;
| | - Jovana S. Vuković
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia; (M.M.B.R.); (J.S.V.)
| | - Marija Vukomanović
- Jožef Stefan Institute, Advanced Materials Department, Jamova Cesta 39, 1000 Ljubljana, Slovenia;
| | - Marina Rubert
- Institute for Biomechanics, ETH Zurich, Leopold-Ruzicka-Weg 4, 8093 Zurich, Switzerland; (M.R.); (S.H.); (R.M.)
| | - Sandra Hofmann
- Institute for Biomechanics, ETH Zurich, Leopold-Ruzicka-Weg 4, 8093 Zurich, Switzerland; (M.R.); (S.H.); (R.M.)
- Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Ralph Müller
- Institute for Biomechanics, ETH Zurich, Leopold-Ruzicka-Weg 4, 8093 Zurich, Switzerland; (M.R.); (S.H.); (R.M.)
| | - Simonida Lj. Tomić
- University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia; (M.M.B.R.); (J.S.V.)
- Correspondence: ; Tel.: +381-11-3303-630
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