1
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Sun S, Liu Y, Gao H, Guan W, Zhao Y, Li G. Cell culture on suspended fiber for tissue regeneration: A review. Int J Biol Macromol 2024; 268:131827. [PMID: 38670204 DOI: 10.1016/j.ijbiomac.2024.131827] [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: 12/25/2023] [Revised: 04/16/2024] [Accepted: 04/22/2024] [Indexed: 04/28/2024]
Abstract
Cell culturing is a cornerstone of tissue engineering, playing a crucial role in tissue regeneration, drug screening, and the study of disease mechanisms. Among various culturing techniques, 3D culture systems, particularly those utilizing suspended fiber scaffolds, offer a more physiologically relevant environment than traditional 2D monolayer cultures. These 3D scaffolds enhance cell growth, differentiation, and proliferation by mimicking the in vivo cellular milieu. This review focuses on the critical role of suspended fiber scaffolds in tissue engineering. We compare the effectiveness of 3D suspended fiber scaffolds with 2D culture systems, discussing their respective benefits and limitations in the context of tissue regeneration. Furthermore, we explore the preparation methods of suspended fiber scaffolds and their potential applications. The review concludes by considering future research directions for optimizing suspended fiber scaffolds to address specific challenges in tissue regeneration, underscoring their significant promise in advancing tissue engineering and regenerative medicine.
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Affiliation(s)
- Shaolan Sun
- Co-innovation Center of Neuroregeneration, Key laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, 226001 Nantong, PR China
| | - Yaqiong Liu
- Co-innovation Center of Neuroregeneration, Key laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, 226001 Nantong, PR China
| | - Hongxia Gao
- Co-innovation Center of Neuroregeneration, Key laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, 226001 Nantong, PR China
| | - Wenchao Guan
- Co-innovation Center of Neuroregeneration, Key laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, 226001 Nantong, PR China
| | - Yahong Zhao
- Co-innovation Center of Neuroregeneration, Key laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, 226001 Nantong, PR China
| | - Guicai Li
- Co-innovation Center of Neuroregeneration, Key laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Nantong University, 226001 Nantong, PR China; NMPA Key Laboratory for Quality Evaluation of Medical Protective and Implant Devices, 450018 Zhengzhou, PR China.
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2
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Hussain MT, Austin-Williams S, Wright TD, Dhawan UK, Pinto AL, Cooper D, Norling LV. β1-Integrin-Mediated Uptake of Chondrocyte Extracellular Vesicles Regulates Chondrocyte Homeostasis. Int J Mol Sci 2024; 25:4756. [PMID: 38731975 PMCID: PMC11083596 DOI: 10.3390/ijms25094756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 05/13/2024] Open
Abstract
Osteoarthritis (OA) is the most prevalent age-related degenerative disorder, which severely reduces the quality of life of those affected. Whilst management strategies exist, no cures are currently available. Virtually all joint resident cells generate extracellular vesicles (EVs), and alterations in chondrocyte EVs during OA have previously been reported. Herein, we investigated factors influencing chondrocyte EV release and the functional role that these EVs exhibit. Both 2D and 3D models of culturing C28I/2 chondrocytes were used for generating chondrocyte EVs. We assessed the effect of these EVs on chondrogenic gene expression as well as their uptake by chondrocytes. Collectively, the data demonstrated that chondrocyte EVs are sequestered within the cartilage ECM and that a bi-directional relationship exists between chondrocyte EV release and changes in chondrogenic differentiation. Finally, we demonstrated that the uptake of chondrocyte EVs is at least partially dependent on β1-integrin. These results indicate that chondrocyte EVs have an autocrine homeostatic role that maintains chondrocyte phenotype. How this role is perturbed under OA conditions remains the subject of future work.
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Affiliation(s)
- Mohammed Tayab Hussain
- The William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK; (M.T.H.); (T.D.W.); (U.K.D.); (D.C.)
| | - Shani Austin-Williams
- The William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK; (M.T.H.); (T.D.W.); (U.K.D.); (D.C.)
| | - Thomas Dudley Wright
- The William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK; (M.T.H.); (T.D.W.); (U.K.D.); (D.C.)
| | - Umesh Kumar Dhawan
- The William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK; (M.T.H.); (T.D.W.); (U.K.D.); (D.C.)
| | - Andreia L. Pinto
- Royal Brompton & Harefield NHS Foundation Trust, London SW3 6PY, UK;
| | - Dianne Cooper
- The William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK; (M.T.H.); (T.D.W.); (U.K.D.); (D.C.)
- Centre for Inflammation and Therapeutic Innovation, Queen Mary University of London, London EC1M 6BQ, UK
| | - Lucy V. Norling
- The William Harvey Research Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK; (M.T.H.); (T.D.W.); (U.K.D.); (D.C.)
- Centre for Inflammation and Therapeutic Innovation, Queen Mary University of London, London EC1M 6BQ, UK
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3
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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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4
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Boscaro D, Sikorski P. Spheroids as a 3D in vitro model to study bone and bone mineralization. BIOMATERIALS ADVANCES 2024; 157:213727. [PMID: 38101067 DOI: 10.1016/j.bioadv.2023.213727] [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: 10/10/2023] [Revised: 11/23/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023]
Abstract
Traumas, fractures, and diseases can severely influence bone tissue. Insight into bone mineralization is essential for the development of therapies and new strategies to enhance bone regeneration. 3D cell culture systems, in particular cellular spheroids, have gained a lot of interest as they can recapitulate crucial aspects of the in vivo tissue microenvironment, such as the extensive cell-cell and cell-extracellular matrix (ECM) interactions found in tissue. The potential of combining spheroids and various classes of biomaterials opens also new opportunities for research within bone tissue engineering. Characterizing cellular organization, ECM structure, and ECM mineralization is a fundamental step for understanding the biological processes involved in bone tissue formation in a spheroid-based model system. Still, many experimental techniques used in this field of research are optimized for use with monolayer cell cultures. There is thus a need to develop new and improving existing experimental techniques, for applications in 3D cell culture systems. In this review, bone composition and spheroids properties are described. This is followed by an insight into the techniques that are currently used in bone spheroids research and how these can be used to study bone mineralization. We discuss the application of staining techniques used with optical and confocal fluorescence microscopy, molecular biology techniques, second harmonic imaging microscopy, Raman spectroscopy and microscopy, as well as electron microscopy-based techniques, to evaluate osteogenic differentiation, collagen production and mineral deposition. Challenges in the applications of these methods in bone regeneration and bone tissue engineering are described. STATEMENT OF SIGNIFICANCE: 3D cell cultures have gained a lot of interest in the last decades as a possible technique that can be used to recreate in vitro in vivo biological process. The importance of 3D environment during bone mineralization led scientists to use this cell culture to study this biological process, to obtain a better understanding of the events involved. New and improved techniques are also required for a proper analysis of this cell model and the process under investigation. This review summarizes the state of the art of the techniques used to study bone mineralization and how 3D cell cultures, in particular spheroids, are tested and analysed to obtain better resolved results related to this complex biological process.
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Affiliation(s)
- Diamante Boscaro
- Department of Physics, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, Trondheim 7034, Norway.
| | - Pawel Sikorski
- Department of Physics, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, Trondheim 7034, Norway.
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Mulaudzi PE, Abrahamse H, Crous A. Insights on Three Dimensional Organoid Studies for Stem Cell Therapy in Regenerative Medicine. Stem Cell Rev Rep 2024; 20:509-523. [PMID: 38095787 PMCID: PMC10837234 DOI: 10.1007/s12015-023-10655-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2023] [Indexed: 02/03/2024]
Abstract
Regenerative medicine has developed as a promising discipline that utilizes stem cells to address limitations in traditional therapies, using innovative techniques to restore and repair damaged organs and tissues. One such technique is the generation of three-dimensional (3D) organoids in stem cell therapy. Organoids are 3D constructs that resemble specific organs' structural and functional characteristics and are generated from stem cells or tissue-specific progenitor cells. The use of 3D organoids is advantageous in comparison to traditional two-dimensional (2D) cell culture by bridging the gap between in vivo and in vitro research. This review aims to provide an overview of the advancements made towards regenerative medicine using stem cells to generate organoids, explore the techniques used in generating 3D organoids and their applications and finally elucidate the challenges and future directions in regenerative medicine using 3D organoids.
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Affiliation(s)
- Precious Earldom Mulaudzi
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, 2028, South Africa
| | - Heidi Abrahamse
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, 2028, South Africa
| | - Anine Crous
- Laser Research Centre, Faculty of Health Sciences, University of Johannesburg, P.O. Box 17011, Doornfontein, 2028, South Africa.
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da Silva AV, Serrenho I, Araújo B, Carvalho AM, Baltazar G. Secretome as a Tool to Treat Neurological Conditions: Are We Ready? Int J Mol Sci 2023; 24:16544. [PMID: 38003733 PMCID: PMC10671352 DOI: 10.3390/ijms242216544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/04/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023] Open
Abstract
Due to their characteristics, mesenchymal stem cells (MSCs) are considered a potential therapy for brain tissue injury or degeneration. Nevertheless, despite the promising results observed, there has been a growing interest in the use of cell-free therapies in regenerative medicine, such as the use of stem cell secretome. This review provides an in-depth compilation of data regarding the secretome composition, protocols used for its preparation, as well as existing information on the impact of secretome administration on various brain conditions, pointing out gaps and highlighting relevant findings. Moreover, due to the ability of MSCs to respond differently depending on their microenvironment, preconditioning of MSCs has been used to modulate their composition and, consequently, their therapeutic potential. The different strategies used to modulate the MSC secretome were also reviewed. Although secretome administration was effective in improving functional impairments, regeneration, neuroprotection, and reducing inflammation in brain tissue, a high variability in secretome preparation and administration was identified, compromising the transposition of preclinical data to clinical studies. Indeed, there are no reports of the use of secretome in clinical trials. Despite the existing limitations and lack of clinical data, secretome administration is a potential tool for the treatment of various diseases that impact the CNS.
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Affiliation(s)
- Andreia Valente da Silva
- Health Sciences Research Center (CICS-UBI), University of Beira Interior, 6201-506 Covilhã, Portugal
| | - Inês Serrenho
- Health Sciences Research Center (CICS-UBI), University of Beira Interior, 6201-506 Covilhã, Portugal
- Center for Neuroscience and Cell Biology (CNC-UC), University of Coimbra, 3004-504 Coimbra, Portugal
| | - Beatriz Araújo
- Health Sciences Research Center (CICS-UBI), University of Beira Interior, 6201-506 Covilhã, Portugal
| | | | - Graça Baltazar
- Health Sciences Research Center (CICS-UBI), University of Beira Interior, 6201-506 Covilhã, Portugal
- Faculty of Health Sciences, University of Beira Interior, 6201-506 Covilhã, Portugal
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7
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Tripathi AS, Zaki MEA, Al-Hussain SA, Dubey BK, Singh P, Rind L, Yadav RK. Material matters: exploring the interplay between natural biomaterials and host immune system. Front Immunol 2023; 14:1269960. [PMID: 37936689 PMCID: PMC10627157 DOI: 10.3389/fimmu.2023.1269960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 10/02/2023] [Indexed: 11/09/2023] Open
Abstract
Biomaterials are widely used for various medical purposes, for instance, implants, tissue engineering, medical devices, and drug delivery systems. Natural biomaterials can be obtained from proteins, carbohydrates, and cell-specific sources. However, when these biomaterials are introduced into the body, they trigger an immune response which may lead to rejection and failure of the implanted device or tissue. The immune system recognizes natural biomaterials as foreign substances and triggers the activation of several immune cells, for instance, macrophages, dendritic cells, and T cells. These cells release pro-inflammatory cytokines and chemokines, which recruit other immune cells to the implantation site. The activation of the immune system can lead to an inflammatory response, which can be beneficial or detrimental, depending on the type of natural biomaterial and the extent of the immune response. These biomaterials can also influence the immune response by modulating the behavior of immune cells. For example, biomaterials with specific surface properties, such as charge and hydrophobicity, can affect the activation and differentiation of immune cells. Additionally, biomaterials can be engineered to release immunomodulatory factors, such as anti-inflammatory cytokines, to promote a tolerogenic immune response. In conclusion, the interaction between biomaterials and the body's immune system is an intricate procedure with potential consequences for the effectiveness of therapeutics and medical devices. A better understanding of this interplay can help to design biomaterials that promote favorable immune responses and minimize adverse reactions.
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Affiliation(s)
| | - Magdi E A Zaki
- Department of Chemistry, Faculty of Science, Imam Mohammad lbn Saud Islamic University, Riyadh, Saudi Arabia
| | - Sami A Al-Hussain
- Department of Chemistry, Faculty of Science, Imam Mohammad lbn Saud Islamic University, Riyadh, Saudi Arabia
| | - Bidhyut Kumar Dubey
- Department of Pharmaceutical Chemistry, Era College of Pharmacy, Era University, Lucknow, India
| | - Prabhjot Singh
- Department of Pharmacology, Era College of Pharmacy, Era University, Lucknow, India
| | - Laiba Rind
- Department of Pharmacology, Era College of Pharmacy, Era University, Lucknow, India
| | - Rajnish Kumar Yadav
- Department of Pharmacology, Era College of Pharmacy, Era University, Lucknow, India
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8
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Morán MDC, Cirisano F, Ferrari M. Spheroid Formation and Recovery Using Superhydrophobic Coating for Regenerative Purposes. Pharmaceutics 2023; 15:2226. [PMID: 37765195 PMCID: PMC10538210 DOI: 10.3390/pharmaceutics15092226] [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: 07/18/2023] [Revised: 08/21/2023] [Accepted: 08/25/2023] [Indexed: 09/29/2023] Open
Abstract
Cell therapies commonly pursue tissue stimulation for regenerative purposes by replacing cell numbers or supplying for functional deficiencies. To this aim, monodispersed cells are usually transplanted for incorporation by local injection. The limitations of this strategy include poor success associated with cell death, insufficient retention, or cell damage due to shear forces associated with the injection. Spheroids have recently emerged as a model that mimics an in vivo environment with more representative cell-to-cell interactions and better intercellular communication. Nevertheless, cost-effective and lab friendly fabrication and effectively performed recovery are challenges that restrict the broad application of spheroids. In this work, glass surfaces were modified with an environmentally friendly superhydrophobic coating. The superhydrophobic surfaces were used for the 3D spheroid preparation of fibroblasts (3T3 cell line) and keratinocytes (HaCaT cell line). The effectiveness of the spheroids to be recovered and grown under 2D culture conditions was evaluated. The morphology of the migrated cells from the 3D spheroids was characterized at the nano-microscale through 3D profilometry. The results demonstrated improved adhesion and proliferation in the migrated cells, both advanced properties for regenerative applications.
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Affiliation(s)
- María del Carmen Morán
- Departament de Bioquímica i Fisiologia, Secció de Fisiologia—Facultat de Farmàcia i Ciències de l’Alimentació, Universitat de Barcelona, Avda. Joan XXIII, 27-31, 08028 Barcelona, Spain
- Institut de Nanociència i Nanotecnologia—IN2UB, Universitat de Barcelona, Avda. Diagonal, 645, 08028 Barcelona, Spain
| | - Francesca Cirisano
- CNR-ICMATE Istituto di Chimica della Materia Condensata e di Tecnologie per l’Energia, Via De Marini, 6, 16149 Genova, Italy;
| | - Michele Ferrari
- Institut de Nanociència i Nanotecnologia—IN2UB, Universitat de Barcelona, Avda. Diagonal, 645, 08028 Barcelona, Spain
- CNR-ICMATE Istituto di Chimica della Materia Condensata e di Tecnologie per l’Energia, Via De Marini, 6, 16149 Genova, Italy;
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Su Y, Ai S, Shen Y, Cheng W, Xu C, Sui L, Zhao Y. Regulatory Effects of Three-Dimensional Cultured Lipopolysaccharide-Pretreated Periodontal Ligament Stem Cell-Derived Secretome on Macrophages. Int J Mol Sci 2023; 24:ijms24086981. [PMID: 37108145 PMCID: PMC10139044 DOI: 10.3390/ijms24086981] [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: 02/15/2023] [Revised: 03/27/2023] [Accepted: 03/31/2023] [Indexed: 04/29/2023] Open
Abstract
Phenotypic transformation of macrophages plays important immune response roles in the occurrence, development and regression of periodontitis. Under inflammation or other environmental stimulation, mesenchymal stem cells (MSCs) exert immunomodulatory effects through their secretome. It has been found that secretome derived from lipopolysaccharide (LPS)-pretreated or three-dimensional (3D)-cultured MSCs significantly reduced inflammatory responses in inflammatory diseases, including periodontitis, by inducing M2 macrophage polarization. In this study, periodontal ligament stem cells (PDLSCs) pretreated with LPS were 3D cultured in hydrogel (termed SupraGel) for a certain period of time and the secretome was collected to explore its regulatory effects on macrophages. Expression changes of immune cytokines in the secretome were also examined to speculate on the regulatory mechanisms in macrophages. The results indicated that PDLSCs showed good viability in SupraGel and could be separated from the gel by adding PBS and centrifuging. The secretome derived from LPS-pretreated and/or 3D-cultured PDLSCs all inhibited the polarization of M1 macrophages, while the secretome derived from LPS-pretreated PDLSCs (regardless of 3D culture) had the ability to promote the polarization of M1 to M2 macrophages and the migration of macrophages. Cytokines involved in the production, migration and polarization of macrophages, as well as multiple growth factors, increased in the PDLSC-derived secretome after LPS pretreatment and/or 3D culture, which suggested that the secretome had the potential to regulate macrophages and promote tissue regeneration, and that it could be used in the treatment of inflammation-related diseases such as periodontitis in the future.
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Affiliation(s)
- Yuran Su
- Department of Prosthodontics, School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Sifan Ai
- Key Laboratory of Bioactive Materials, Ministry of Education, State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Collaborative Innovation Center of Chemical Science and Engineering, and National Institute of Functional Materials, Nankai University, Tianjin 300071, China
| | - Youqing Shen
- Department of Orthodontics, School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Wen Cheng
- Department of Orthodontics, School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Chenyu Xu
- Department of Orthodontics, School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Lei Sui
- Department of Prosthodontics, School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
| | - Yanhong Zhao
- Department of Orthodontics, School and Hospital of Stomatology, Tianjin Medical University, Tianjin 300070, China
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10
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Li S, Sun Y, Chen Y, Lu J, Jiang G, Yu K, Wu Y, Mao Y, Jin H, Luo J, Dong S, Hu B, Ding Y, Liu A, Shen Y, Feng G, Yan S, He Y, Yan R. Sandwich Biomimetic Scaffold Based Tendon Stem/Progenitor Cell Alignment in a 3D Microenvironment for Functional Tendon Regeneration. ACS APPLIED MATERIALS & INTERFACES 2023; 15:4652-4667. [PMID: 36698266 DOI: 10.1021/acsami.2c16584] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Tendon injuries are some of the most commonly diagnosed musculoskeletal diseases. Tendon regeneration is sensitive to the topology of the substitute as it affects the cellular microenvironment and homeostasis. To bionic in vivo three-dimensional (3D) aligned microenvironment, an ordered 3D sandwich model was used to investigate the cell response in the tendon. First, high-resolution 3D printing provided parallel-grooved topographical cues on the hydrogel surface. Then the cells were seeded on its surface to acquire a 2D model. Afterward, an additional hydrogel coating layer was applied to the cells to create the 3D model. The interaction between cells and order structures in three-dimensions is yet to be explored. The study found that the tendon stem/progenitor cells (TSPCs) still maintain their ordering growth in the 3D model as in the 2D model. The study also found that the 3D-aligned TSPCs exhibited enhanced tenogenic differentiation through the PI3K-AKT signaling pathway and presented a less inflammatory phenotype than those in the 2D model. The in vivo implantation of such a 3D-aligned TSPC composite promoted tendon regeneration and mitigated heterotopic ossification in an Achilles defect model. These findings demonstrated that 3D-aligned TSPCs within a biomimetic topology environment are promising for functional tendon regeneration.
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Affiliation(s)
- Sihao Li
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
| | - Yuan Sun
- State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Materials Processing and Mold, Zhengzhou University, Zhengzhou, 450002, China
| | - Yazhou Chen
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
| | - Jinwei Lu
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
| | - Guangyao Jiang
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
| | - Kang Yu
- State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Materials Processing and Mold, Zhengzhou University, Zhengzhou, 450002, China
| | - Yifan Wu
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
| | - Yufei Mao
- Medical College of Tianjin University, Tianjin University, Tianjin, 300072, China
| | - Hao Jin
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, 311200, China
| | - Jikui Luo
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, 311200, China
| | - Shurong Dong
- Key Lab. of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, 310027, China
- ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, 311200, China
| | - Bin Hu
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
| | - Yi Ding
- Basic Medical College, Naval Medical University, Shanghai, 200433, China
| | - An Liu
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
| | - Yu Shen
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
| | - Gang Feng
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
| | - Shigui Yan
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
| | - Yong He
- State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Materials Processing and Mold, Zhengzhou University, Zhengzhou, 450002, China
- Cancer Center, Zhejiang University, Hangzhou, Zhejiang, 310058, China
| | - Ruijian Yan
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou, 310000, China
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11
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Pretreated Mesenchymal Stem Cells and Their Secretome: Enhanced Immunotherapeutic Strategies. Int J Mol Sci 2023; 24:ijms24021277. [PMID: 36674790 PMCID: PMC9864323 DOI: 10.3390/ijms24021277] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/24/2022] [Accepted: 12/28/2022] [Indexed: 01/11/2023] Open
Abstract
Mesenchymal stem cells (MSCs) with self-renewing, multilineage differentiation and immunomodulatory properties, have been extensively studied in the field of regenerative medicine and proved to have significant therapeutic potential in many different pathological conditions. The role of MSCs mainly depends on their paracrine components, namely secretome. However, the components of MSC-derived secretome are not constant and are affected by the stimulation MSCs are exposed to. Therefore, the content and composition of secretome can be regulated by the pretreatment of MSCs. We summarize the effects of different pretreatments on MSCs and their secretome, focusing on their immunomodulatory properties, in order to provide new insights for the therapeutic application of MSCs and their secretome in inflammatory immune diseases.
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12
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Shou Y, Liu L, Liu Q, Le Z, Lee KL, Li H, Li X, Koh DZ, Wang Y, Liu TM, Yang Z, Lim CT, Cheung C, Tay A. Mechano-responsive hydrogel for direct stem cell manufacturing to therapy. Bioact Mater 2023; 24:387-400. [PMID: 36632503 PMCID: PMC9817177 DOI: 10.1016/j.bioactmat.2022.12.019] [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: 10/09/2022] [Revised: 12/05/2022] [Accepted: 12/20/2022] [Indexed: 01/04/2023] Open
Abstract
Bone marrow-derived mesenchymal stem cell (MSC) is one of the most actively studied cell types due to its regenerative potential and immunomodulatory properties. Conventional cell expansion methods using 2D tissue culture plates and 2.5D microcarriers in bioreactors can generate large cell numbers, but they compromise stem cell potency and lack mechanical preconditioning to prepare MSC for physiological loading expected in vivo. To overcome these challenges, in this work, we describe a 3D dynamic hydrogel using magneto-stimulation for direct MSC manufacturing to therapy. With our technology, we found that dynamic mechanical stimulation (DMS) enhanced matrix-integrin β1 interactions which induced MSCs spreading and proliferation. In addition, DMS could modulate MSC biofunctions including directing MSC differentiation into specific lineages and boosting paracrine activities (e.g., growth factor secretion) through YAP nuclear localization and FAK-ERK pathway. With our magnetic hydrogel, complex procedures from MSC manufacturing to final clinical use, can be integrated into one single platform, and we believe this 'all-in-one' technology could offer a paradigm shift to existing standards in MSC therapy.
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Affiliation(s)
- Yufeng Shou
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
| | - Ling Liu
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
- NUS Tissue Engineering Program, National University of Singapore, 117510, Singapore
| | - Qimin Liu
- School of Civil Engineering and Architecture, Wuhan University of Technology, 430070, Wuhan, China
| | - Zhicheng Le
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
| | - Khang Leng Lee
- Lee Kong Chian School of Medicine, Nanyang Technological University, 636921, Singapore
| | - Hua Li
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore
| | - Xianlei Li
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
| | - Dion Zhanyun Koh
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
| | - Yuwen Wang
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
| | - Tong Ming Liu
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 138648, Singapore
| | - Zheng Yang
- NUS Tissue Engineering Program, National University of Singapore, 117510, Singapore
- Department of Orthopaedic Surgery, Yong Loo Lin School of Medicine, National University of Singapore, 119288, Singapore
| | - Chwee Teck Lim
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
- Mechanobiology Institute, National University of Singapore, 117411, Singapore
| | - Christine Cheung
- Lee Kong Chian School of Medicine, Nanyang Technological University, 636921, Singapore
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 138648, Singapore
| | - Andy Tay
- Department of Biomedical Engineering, National University of Singapore, 117583, Singapore
- Institute for Health Innovation & Technology, National University of Singapore, 117599, Singapore
- NUS Tissue Engineering Program, National University of Singapore, 117510, Singapore
- Corresponding author. Department of Biomedical Engineering, National University of Singapore, 117583, Singapore.
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13
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Xia ZJ, Mahajan S, Paul Daniel EJ, Ng BG, Saraswat M, Campos AR, Murad R, He M, Freeze HH. COG4 mutation in Saul-Wilson syndrome selectively affects secretion of proteins involved in chondrogenesis in chondrocyte-like cells. Front Cell Dev Biol 2022; 10:979096. [PMID: 36393834 PMCID: PMC9649697 DOI: 10.3389/fcell.2022.979096] [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: 06/27/2022] [Accepted: 10/17/2022] [Indexed: 01/05/2023] Open
Abstract
Saul-Wilson syndrome is a rare skeletal dysplasia caused by a heterozygous mutation in COG4 (p.G516R). Our previous study showed that this mutation affected glycosylation of proteoglycans and disturbed chondrocyte elongation and intercalation in zebrafish embryos expressing the COG4p.G516R variant. How this mutation causes chondrocyte deficiencies remain unsolved. To analyze a disease-relevant cell type, COG4p.G516R variant was generated by CRISPR knock-in technique in the chondrosarcoma cell line SW1353 to study chondrocyte differentiation and protein secretion. COG4p.G516R cells display impaired protein trafficking and altered COG complex size, similar to SWS-derived fibroblasts. Both SW1353 and HEK293T cells carrying COG4p.G516R showed very modest, cell-type dependent changes in N-glycans. Using 3D culture methods, we found that cells carrying the COG4p.G516R variant made smaller spheroids and had increased apoptosis, indicating impaired in vitro chondrogenesis. Adding WT cells or their conditioned medium reduced cell death and increased spheroid sizes of COG4p.G516R mutant cells, suggesting a deficiency in secreted matrix components. Mass spectrometry-based secretome analysis showed selectively impaired protein secretion, including MMP13 and IGFBP7 which are involved in chondrogenesis and osteogenesis. We verified reduced expression of chondrogenic differentiation markers, MMP13 and COL10A1 and delayed response to BMP2 in COG4p.G516R mutant cells. Collectively, our results show that the Saul-Wilson syndrome COG4p.G516R variant selectively affects the secretion of multiple proteins, especially in chondrocyte-like cells which could further cause pleiotropic defects including hampering long bone growth in SWS individuals.
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Affiliation(s)
- Zhi-Jie Xia
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
| | - Sonal Mahajan
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
| | - Earnest James Paul Daniel
- Department of Pathology and Laboratory Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA, United States
| | - Bobby G. Ng
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
| | - Mayank Saraswat
- Immunity and Pathogenesis Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
| | - Alexandre Rosa Campos
- Proteomics Facility, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
| | - Rabi Murad
- Bioinformatics Core, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
| | - Miao He
- Department of Pathology and Laboratory Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA, United States
| | - Hudson H. Freeze
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States,*Correspondence: Hudson H. Freeze,
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14
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Intermittent compressive force regulates human periodontal ligament cell behavior via yes-associated protein. Heliyon 2022; 8:e10845. [PMID: 36247165 PMCID: PMC9561743 DOI: 10.1016/j.heliyon.2022.e10845] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 09/05/2022] [Accepted: 09/26/2022] [Indexed: 11/30/2022] Open
Abstract
Intermittent compressive force influences human periodontal ligament (PDL) cell behavior that facilitates periodontal tissue regeneration. In response to mechanical stimuli, Yes-associated protein (YAP) has been recognized as a mechanosensitive transcriptional activator that regulates cell proliferation and cell fate decisions. This study aimed to investigate whether compressive forces influence cell proliferation and cell fate decisions of human PDL cells via YAP signaling. YAP expression was silenced by shRNA. The effect of YAP on cell proliferation, adipogenesis and osteogenesis of PDL cells under ICF loading were determined. Adipogenic differentiation bias upon ICF loading was confirmed by fourier-transform infrared spectroscopy (FTIR). The results revealed that ICF-induced YAP promotes osteogenesis, but it inhibits adipogenesis in PDL cells. Depletion of YAP results in PDL cells that are irresponsive to ICF and, therefore, the failure of the PDL cells to undergo osteogenic differentiation. This was shown by a significant reduction in calcium deposited in the CF-derived osteoblasts of the YAP-knockdown (YAP-KD) PDL cells. As to control treatment, reduction of YAP promoted adipogenesis, whereas ICF-induced YAP inhibited this mechanism. However, the adipocyte differentiation in YAP-KD cells was not affected upon ICF treatment as the YAP-KD cells still exhibited a better adipogenic differentiation that was unrelated to the ICF. This study demonstrated that, in response to ICF treatment, YAP could be a crucial mechanosensitive transcriptional activator for the regulation of PDL cell behavior through a mechanobiological process. Our results may provide the possibility of facilitating PDL tissue regeneration by manipulation of the Hippo-YAP signaling pathway. YAP plays role as a mechanosensitive transcriptional activator of human PDL cells in response to ICF. ICF activates YAP and its target genes to promote cell proliferation and osteogenic differentiation of human PDL cells. Loss of YAP enhances adipogenic differentiation of human periodontal ligament cells.
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15
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Patrick MD, Keys JF, Suresh Kumar H, Annamalai RT. Injectable nanoporous microgels generate vascularized constructs and support bone regeneration in critical-sized defects. Sci Rep 2022; 12:15811. [PMID: 36138042 PMCID: PMC9499928 DOI: 10.1038/s41598-022-19968-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 09/07/2022] [Indexed: 11/09/2022] Open
Abstract
Large and aberrant bone fractures require ossification and concomitant vascularization for proper healing. Evidence indicates that osteogenesis and vessel growth are coupled in bone fractures. Although the synergistic role of endothelial cells has been recognized, vascularizing large bone grafts remains a challenge and has apprehended the clinical translation of engineered bone constructs. Here, we describe a facile method to fabricate vascularized constructs using chitosan and gelatin-based microgels that promote osteogenesis of human mesenchymal stromal cells (MSC) while supporting endothelial sprouting and network formation. The microgels are enzymatically degradable and had a high hydration rate with a volume swelling ratio of ~ 493% and a polymer density of ~ 431 mg/cm3, which is comparable to that of native skeletal tissues. AFM indentation of the surface showed an average Young's modulus of 189 kPa, falling in a range that is conducive to both osteogenesis and vasculogenesis. The osteogenic microgel containing chitosan, gelatin, and hydroxyapatite, mimicking the bone matrix, supported robust attachment, proliferation, and differentiation of MSC. On the other hand, the vasculogenic microgels containing only gelatin, enriched endothelial phenotype and enabled vascular networks formation when embedded in 3D matrices. Combining the two types of microgels created a hybrid construct that sustained the functions of both osteogenic and vasculogenic microgels and enhanced one another. Using a murine model, we also show that the osteogenic microgels regenerate bone in a critical-sized defect with > 95% defect closure by week 12. These multifunctional microgels can be administered minimally invasively and can conformally fill large bone defects. This work lays the foundation to establish principles of designing multiphasic scaffolds with tissue-specific biophysical and biochemical properties for regenerating vascularized and interfacial tissues.
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Affiliation(s)
- Matthew D Patrick
- Department of Biomedical Engineering, University of Kentucky, 760 Press Avenue, 138 Healthy Kentucky Research Building, Lexington, KY, 40536, USA
| | - Jeremy F Keys
- Department of Biomedical Engineering, University of Kentucky, 760 Press Avenue, 138 Healthy Kentucky Research Building, Lexington, KY, 40536, USA
| | - Harshini Suresh Kumar
- Department of Biomedical Engineering, University of Kentucky, 760 Press Avenue, 138 Healthy Kentucky Research Building, Lexington, KY, 40536, USA
| | - Ramkumar T Annamalai
- Department of Biomedical Engineering, University of Kentucky, 760 Press Avenue, 138 Healthy Kentucky Research Building, Lexington, KY, 40536, USA.
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16
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Physiological Mineralization during In Vitro Osteogenesis in a Biomimetic Spheroid Culture Model. Cells 2022; 11:cells11172702. [PMID: 36078105 PMCID: PMC9454617 DOI: 10.3390/cells11172702] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 08/22/2022] [Accepted: 08/25/2022] [Indexed: 11/16/2022] Open
Abstract
Bone health-targeting drug development strategies still largely rely on inferior 2D in vitro screenings. We aimed at developing a scaffold-free progenitor cell-based 3D biomineralization model for more physiological high-throughput screenings. MC3T3-E1 pre-osteoblasts were cultured in α-MEM with 10% FCS, at 37 °C and 5% CO2 for up to 28 days, in non-adherent V-shaped plates to form uniformly sized 3D spheroids. Osteogenic differentiation was induced by 10 mM β-glycerophosphate and 50 µg/mL ascorbic acid. Mineralization stages were assessed through studying expression of marker genes, alkaline phosphatase activity, and calcium deposition by histochemistry. Mineralization quality was evaluated by Fourier transformed infrared (FTIR) and scanning electron microscopic (SEM) analyses and quantified by micro-CT analyses. Expression profiles of selected early- and late-stage osteoblast differentiation markers indicated a well-developed 3D biomineralization process with strongly upregulated Col1a1, Bglap and Alpl mRNA levels and type I collagen- and osteocalcin-positive immunohistochemistry (IHC). A dynamic biomineralization process with increasing mineral densities was observed during the second half of the culture period. SEM–Energy-Dispersive X-ray analyses (EDX) and FTIR ultimately confirmed a native bone-like hydroxyapatite mineral deposition ex vivo. We thus established a robust and versatile biomimetic, and high-throughput compatible, cost-efficient spheroid culture model with a native bone-like mineralization for improved pharmacological ex vivo screenings.
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17
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Holkar K, Kale V, Ingavle G. Well-orchestrated physico-chemical and biological factors for enhanced secretion of osteogenic and angiogenic extracellular vesicles by mesenchymal stem cells in a 3D culture format. Biomater Sci 2022; 10:4458-4473. [PMID: 35815723 DOI: 10.1039/d2bm00750a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The secretome of mesenchymal stem cells (MSCs) is being studied for its regenerative potential for the treatment of various disorders, including bone diseases. However, mimicking the physiological parameters of native bone could further improve MSCs' secretory profile. The proteomic analysis revealed that MSCs have a diverse secretory profile depending on the cell formats used to grow them, such as two-dimensional (2D) or three-dimensional (3D) microenvironments. Stem cells are given biochemical and biophysical stimuli in a 3D milieu that mimics in vivo situations. Compared to the gold standard monolayer culture, extracellular vesicles (EVs) released under 3D conditions improved the EV cargo numerically and qualitatively. The higher requirements of EVs in clinical trials with consistent therapeutic potential are challenging. This review discusses the impact of cell culture formats on the regenerative potential of MSCs, specifically in bone regeneration. The poor yield and heterogeneity issues have hampered the therapeutic usage of EVs. Therefore, this review further explores various engineering approaches that could enhance EVs' scalability from MSCs and their therapeutic effectiveness beyond their native utility in bone tissue regeneration. This review also highlights some of the upcoming 3D approaches/models that might be useful for the enhanced secretion of therapeutic EVs from stem cells. Finally, we discuss possible future directions and conclusions in this domain.
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Affiliation(s)
- Ketki Holkar
- Symbiosis Centre for Stem Cell Research (SCSCR), Symbiosis International (Deemed University), Pune 412115, India. .,Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University), Pune 412115, India
| | - Vaijayanti Kale
- Symbiosis Centre for Stem Cell Research (SCSCR), Symbiosis International (Deemed University), Pune 412115, India. .,Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University), Pune 412115, India
| | - Ganesh Ingavle
- Symbiosis Centre for Stem Cell Research (SCSCR), Symbiosis International (Deemed University), Pune 412115, India. .,Symbiosis School of Biological Sciences (SSBS), Symbiosis International (Deemed University), Pune 412115, India
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18
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Yang Y, Kulkarni A, Soraru GD, Pearce JM, Motta A. 3D Printed SiOC(N) Ceramic Scaffolds for Bone Tissue Regeneration: Improved Osteogenic Differentiation of Human Bone Marrow-Derived Mesenchymal Stem Cells. Int J Mol Sci 2021; 22:ijms222413676. [PMID: 34948473 PMCID: PMC8706922 DOI: 10.3390/ijms222413676] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/13/2021] [Accepted: 12/15/2021] [Indexed: 11/16/2022] Open
Abstract
Bone tissue engineering has developed significantly in recent years as there has been increasing demand for bone substitutes due to trauma, cancer, arthritis, and infections. The scaffolds for bone regeneration need to be mechanically stable and have a 3D architecture with interconnected pores. With the advances in additive manufacturing technology, these requirements can be fulfilled by 3D printing scaffolds with controlled geometry and porosity using a low-cost multistep process. The scaffolds, however, must also be bioactive to promote the environment for the cells to regenerate into bone tissue. To determine if a low-cost 3D printing method for bespoke SiOC(N) porous structures can regenerate bone, these structures were tested for osteointegration potential by using human mesenchymal stem cells (hMSCs). This includes checking the general biocompatibilities under the osteogenic differentiation environment (cell proliferation and metabolism). Moreover, cell morphology was observed by confocal microscopy, and gene expressions on typical osteogenic markers at different stages for bone formation were determined by real-time PCR. The results of the study showed the pore size of the scaffolds had a significant impact on differentiation. A certain range of pore size could stimulate osteogenic differentiation, thus promoting bone regrowth and regeneration.
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Affiliation(s)
- Yuejiao Yang
- BIOtech, Center for Biomedical Technologies, University of Trento, Via Sommarive 9, 38123 Trento, Italy;
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine Unit, Via delle Regole 101, 38123 Trento, Italy
- Correspondence: (Y.Y.); (A.K.)
| | - Apoorv Kulkarni
- Glass & Ceramics Lab, Department of Industrial Engineering, University of Trento, Via Sommerive 9, 38123 Trento, Italy;
- Correspondence: (Y.Y.); (A.K.)
| | - Gian Domenico Soraru
- Glass & Ceramics Lab, Department of Industrial Engineering, University of Trento, Via Sommerive 9, 38123 Trento, Italy;
| | - Joshua M. Pearce
- Department of Electrical and Computer Engineering, Western University, 1151 Richmond St. N., London, ON N6A 5B9, Canada;
| | - Antonella Motta
- BIOtech, Center for Biomedical Technologies, University of Trento, Via Sommarive 9, 38123 Trento, Italy;
- European Institute of Excellence on Tissue Engineering and Regenerative Medicine Unit, Via delle Regole 101, 38123 Trento, Italy
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19
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Widera D. Recent Advances in Translational Adipose-Derived Stem Cell Biology. Biomolecules 2021; 11:biom11111660. [PMID: 34827658 PMCID: PMC8615724 DOI: 10.3390/biom11111660] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 11/05/2021] [Indexed: 12/30/2022] Open
Affiliation(s)
- Darius Widera
- Stem Cell Biology and Regenerative Medicine Group, School of Pharmacy, University of Reading, Reading RG6 6UB, UK
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20
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Song EM, Joo YH, Choe AR, Park Y, Tae CH, Hong JT, Moon CM, Kim SE, Jung HK, Shim KN, Cho KA, Jo I, Jung SA. Three-dimensional culture method enhances the therapeutic efficacies of tonsil-derived mesenchymal stem cells in murine chronic colitis model. Sci Rep 2021; 11:19589. [PMID: 34599237 PMCID: PMC8486762 DOI: 10.1038/s41598-021-98711-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 09/07/2021] [Indexed: 12/14/2022] Open
Abstract
Tonsil-derived mesenchymal stem cells (TMSCs) showed therapeutic effects on acute and chronic murine colitis models, owing to their immunomodulatory properties; therefore, we evaluated enhanced therapeutic effects of TMSCs on a murine colitis model using three-dimensional (3D) culture method. The expression of angiogenic factors, VEGF, and anti-inflammatory cytokines, IL-10, TSG-6, TGF-β, and IDO-1, was significantly higher in the 3D-TMSC-treated group than in the 2D-TMSC-treated group (P < 0.05). At days 18 and 30 after inducing chronic colitis, disease activity index scores were estimated to be significantly lower in the 3D-TMSC-treated group than in the colitis control (P < 0.001 and P < 0.001, respectively) and 2D-TMSC-treated groups (P = 0.022 and P = 0.004, respectively). Body weight loss was significantly lower in the 3D-TMSC-treated group than in the colitis control (P < 0.001) and 2D-TMSC-treated groups (P = 0.005). Colon length shortening was significantly recovered in the 3D-TMSC-treated group compared to that in the 2D-TMSC-treated group (P = 0.001). Histological scoring index was significantly lower in the 3D-TMSC-treated group than in the 2D-TMSC-treated group (P = 0.002). These results indicate that 3D-cultured TMSCs showed considerably higher therapeutic effects in a chronic murine colitis model than those of 2D-cultured TMSCs via increased anti-inflammatory cytokine expression.
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Affiliation(s)
- Eun Mi Song
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Yang Hee Joo
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - A Reum Choe
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Yehyun Park
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Chung Hyun Tae
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Ji Teak Hong
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Chang Mo Moon
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Seong-Eun Kim
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Hye-Kyung Jung
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Ki-Nam Shim
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Kyung-Ah Cho
- Department of Microbiology, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Inho Jo
- Department of Molecular Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea
| | - Sung-Ae Jung
- Department of Internal Medicine, College of Medicine, Ewha Womans University, Seoul, South Korea.
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21
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Torre EC, Bicer M, Cottrell GS, Widera D, Tamagnini F. Time-Dependent Reduction of Calcium Oscillations in Adipose-Derived Stem Cells Differentiating towards Adipogenic and Osteogenic Lineage. Biomolecules 2021; 11:biom11101400. [PMID: 34680033 PMCID: PMC8533133 DOI: 10.3390/biom11101400] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/16/2021] [Accepted: 09/20/2021] [Indexed: 12/11/2022] Open
Abstract
Adipose-derived mesenchymal stromal cells (ASCs) are multipotent stem cells which can differentiate into various cell types, including osteocytes and adipocytes. Due to their ease of harvesting, multipotency, and low tumorigenicity, they are a prime candidate for the development of novel interventional approaches in regenerative medicine. ASCs exhibit slow, spontaneous Ca2+ oscillations and the manipulation of Ca2+ signalling via electrical stimulation was proposed as a potential route for promoting their differentiation in vivo. However, the effects of differentiation-inducing treatments on spontaneous Ca2+ oscillations in ASCs are not yet fully characterised. In this study, we used 2-photon live Ca2+ imaging to assess the fraction of cells showing spontaneous oscillations and the frequency of the oscillation (measured as interpeak interval—IPI) in ASCs undergoing osteogenic or adipogenic differentiation, using undifferentiated ASCs as controls. The measurements were carried out at 7, 14, and 21 days in vitro (DIV) to assess the effect of time in culture on Ca2+ dynamics. We observed that both time and differentiation treatment are important factors associated with a reduced fraction of cells showing Ca2+ oscillations, paralleled by increased IPI times, in comparison with untreated ASCs. Both adipogenic and osteogenic differentiation resulted in a reduction in Ca2+ dynamics, such as the fraction of cells showing intracellular Ca2+ oscillations and their frequency. Adipogenic differentiation was associated with a more pronounced reduction of Ca2+ dynamics compared to cells differentiating towards the osteogenic fate. Changes in Ca2+ associated oscillations with a specific treatment had already occurred at 7 DIV. Finally, we observed a reduction in Ca2+ dynamics over time in untreated ASCs. These data suggest that adipogenic and osteogenic differentiation cell fates are associated with specific changes in spontaneous Ca2+ dynamics over time. While this observation is interesting and provides useful information to understand the functional correlates of stem cell differentiation, further studies are required to clarify the molecular and mechanistic correlates of these changes. This will allow us to better understand the causal relationship between Ca2+ dynamics and differentiation, potentially leading to the development of novel, more effective interventions for both bone regeneration and control of adipose growth.
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Affiliation(s)
- Enrico C. Torre
- Stem Cell Biology and Regenerative Medicine Group, School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6LA, UK; (E.C.T.); (M.B.)
- Neuronal and Cellular Physiology Group, School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6LA, UK
- Biomedicine West Wing, International Centre for Life, Times Square, Newcastle University, Newcastle upon Tyne NE1 3BZ, UK
| | - Mesude Bicer
- Stem Cell Biology and Regenerative Medicine Group, School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6LA, UK; (E.C.T.); (M.B.)
- Department of Bioengineering, Sumer Campus, Abdullah Gül University, Kayseri 38080, Turkey
| | - Graeme S. Cottrell
- Cellular and Molecular Neuroscience, School of Pharmacy, University of Reading, Reading RG6 6LA, UK;
| | - Darius Widera
- Stem Cell Biology and Regenerative Medicine Group, School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6LA, UK; (E.C.T.); (M.B.)
- Correspondence: (D.W.); (F.T.)
| | - Francesco Tamagnini
- Neuronal and Cellular Physiology Group, School of Pharmacy, University of Reading, Whiteknights, Reading RG6 6LA, UK
- Correspondence: (D.W.); (F.T.)
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22
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Karoichan A, Baudequin T, Al-Jallad H, Tabrizian M. Encapsulation and differentiation of adipose-derived mesenchymal stem cells in a biomimetic purine cross-linked chitosan sponge. J Biomed Mater Res A 2021; 110:585-594. [PMID: 34545996 DOI: 10.1002/jbm.a.37311] [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] [Received: 05/21/2021] [Revised: 08/19/2021] [Accepted: 09/07/2021] [Indexed: 12/11/2022]
Abstract
Mesenchymal stem cells derived from adipose tissue have become a widely investigated cell source to use in tissue engineering applications. However, an optimal delivery scaffold for these cells is still needed. A rapidly gelling, injectable chitosan sponge was proposed in this study as a potential candidate for a suitable delivery scaffold. The results demonstrated the ability to encapsulate the stem cells at a 97.6% encapsulation efficiency and that the cells maintain their viability within the sponge. With the potential of using this scaffold for bone tissue engineering, ALP activity assay and fluorescent imaging for osteocalcin proved the ability to differentiate the encapsulated cells into the osteogenic lineage. Furthermore, co-encapsulation of pyrophosphatase within the sponge was investigated as a method to overcome the inhibitory effects that the sponge degradation by-products have on mineralization. Alizarin Red S staining demonstrated the beneficial effects of adding pyrophosphatase, where a significant increase in mineralization levels was achieved.
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Affiliation(s)
- Antoine Karoichan
- Faculty of Dentistry, McGill University, Montreal, Quebec, Canada.,Shriners Hospitals for Children, Montreal, Quebec, Canada
| | - Timothée Baudequin
- Biomedical Engineering Department, McGill University, Montreal, Quebec, Canada
| | - Hadil Al-Jallad
- Faculty of Dentistry, McGill University, Montreal, Quebec, Canada.,Shriners Hospitals for Children, Montreal, Quebec, Canada.,Department of Experimental Surgery, McGill University, Montreal, Quebec, Canada
| | - Maryam Tabrizian
- Faculty of Dentistry, McGill University, Montreal, Quebec, Canada.,Biomedical Engineering Department, McGill University, Montreal, Quebec, Canada
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Firipis K, Nisbet DR, Franks SJ, Kapsa RMI, Pirogova E, Williams RJ, Quigley A. Enhancing Peptide Biomaterials for Biofabrication. Polymers (Basel) 2021; 13:polym13162590. [PMID: 34451130 PMCID: PMC8400132 DOI: 10.3390/polym13162590] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/30/2021] [Accepted: 07/30/2021] [Indexed: 12/20/2022] Open
Abstract
Biofabrication using well-matched cell/materials systems provides unprecedented opportunities for dealing with human health issues where disease or injury overtake the body’s native regenerative abilities. Such opportunities can be enhanced through the development of biomaterials with cues that appropriately influence embedded cells into forming functional tissues and organs. In this context, biomaterials’ reliance on rigid biofabrication techniques needs to support the incorporation of a hierarchical mimicry of local and bulk biological cues that mimic the key functional components of native extracellular matrix. Advances in synthetic self-assembling peptide biomaterials promise to produce reproducible mimics of tissue-specific structures and may go some way in overcoming batch inconsistency issues of naturally sourced materials. Recent work in this area has demonstrated biofabrication with self-assembling peptide biomaterials with unique biofabrication technologies to support structural fidelity upon 3D patterning. The use of synthetic self-assembling peptide biomaterials is a growing field that has demonstrated applicability in dermal, intestinal, muscle, cancer and stem cell tissue engineering.
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Affiliation(s)
- Kate Firipis
- Biofab3D, Aikenhead Centre for Medical Discovery, St Vincent’s Hospital Melbourne, Fitzroy, VIC 3065, Australia; (K.F.); (R.M.I.K.); (E.P.)
- Biomedical and Electrical Engineering, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
| | - David R. Nisbet
- Laboratory of Advanced Biomaterials, The Australian National University, Acton, Canberra, ACT 2601, Australia; (D.R.N.); (S.J.F.)
- The Graeme Clark Institute, Faculty of Engineering and Information Technology, Melbourne, VIC 3000, Australia
- Faculty of Medicine, Dentistry and Health Services, The University of Melbourne, Melbourne, VIC 3000, Australia
| | - Stephanie J. Franks
- Laboratory of Advanced Biomaterials, The Australian National University, Acton, Canberra, ACT 2601, Australia; (D.R.N.); (S.J.F.)
| | - Robert M. I. Kapsa
- Biofab3D, Aikenhead Centre for Medical Discovery, St Vincent’s Hospital Melbourne, Fitzroy, VIC 3065, Australia; (K.F.); (R.M.I.K.); (E.P.)
- Biomedical and Electrical Engineering, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
- Department of Medicine, Melbourne University, St Vincent’s Hospital Melbourne, Fitzroy, VIC 3064, Australia
| | - Elena Pirogova
- Biofab3D, Aikenhead Centre for Medical Discovery, St Vincent’s Hospital Melbourne, Fitzroy, VIC 3065, Australia; (K.F.); (R.M.I.K.); (E.P.)
- Biomedical and Electrical Engineering, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
| | - Richard J. Williams
- Biofab3D, Aikenhead Centre for Medical Discovery, St Vincent’s Hospital Melbourne, Fitzroy, VIC 3065, Australia; (K.F.); (R.M.I.K.); (E.P.)
- Institute of Mental and Physical Health and Clinical Translation, School of Medicine, Deakin University, Waurn Ponds, VIC 3216, Australia
- Correspondence: (R.J.W.); (A.Q.)
| | - Anita Quigley
- Biofab3D, Aikenhead Centre for Medical Discovery, St Vincent’s Hospital Melbourne, Fitzroy, VIC 3065, Australia; (K.F.); (R.M.I.K.); (E.P.)
- Biomedical and Electrical Engineering, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
- Department of Medicine, Melbourne University, St Vincent’s Hospital Melbourne, Fitzroy, VIC 3064, Australia
- Correspondence: (R.J.W.); (A.Q.)
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Comparative Transcriptome Analysis of Human Adipose-Derived Stem Cells Undergoing Osteogenesis in 2D and 3D Culture Conditions. Int J Mol Sci 2021; 22:ijms22157939. [PMID: 34360705 PMCID: PMC8347556 DOI: 10.3390/ijms22157939] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/18/2021] [Accepted: 07/21/2021] [Indexed: 01/03/2023] Open
Abstract
Human adipose-derived stem cells (hADSCs) are types of mesenchymal stem cells (MSCs) that have been used as tissue engineering models for bone, cartilage, muscle, marrow stroma, tendon, fat and other connective tissues. Tissue regeneration materials composed of hADSCs have the potential to play an important role in reconstituting damaged tissue or diseased mesenchymal tissue. In this study, we assessed and investigated the osteogenesis of hADSCs in both two-dimensional (2D) and three-dimensional (3D) culture conditions. We confirmed that the hADSCs successfully differentiated into bone tissues by ARS staining and quantitative RT–PCR. To gain insight into the detailed biological difference between the two culture conditions, we profiled the overall gene expression by analyzing the whole transcriptome sequencing data using various bioinformatic methods. We profiled the overall gene expression through RNA-Seq and further analyzed this using various bioinformatic methods. During differential gene expression testing, significant differences in the gene expressions between hADSCs cultured in 2D and 3D conditions were observed. The genes related to skeletal development, bone development and bone remodeling processes were overexpressed in the 3D culture condition as compared to the 2D culture condition. In summary, our RNA-Seq-based study proves effective in providing new insights that contribute toward achieving a genome-wide understanding of gene regulation in mesenchymal stem cell osteogenic differentiation and bone tissue regeneration within the 3D culture system.
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