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Pan Q, Su W, Yao Y. Progress in microsphere-based scaffolds in bone/cartilage tissue engineering. Biomed Mater 2023; 18:062004. [PMID: 37751762 DOI: 10.1088/1748-605x/acfd78] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 09/26/2023] [Indexed: 09/28/2023]
Abstract
Bone/cartilage repair and regeneration have been popular and difficult issues in medical research. Tissue engineering is rapidly evolving to provide new solutions to this problem, and the key point is to design the appropriate scaffold biomaterial. In recent years, microsphere-based scaffolds have been considered suitable scaffold materials for bone/cartilage injury repair because microporous structures can form more internal space for better cell proliferation and other cellular activities, and these composite scaffolds can provide physical/chemical signals for neotissue formation with higher efficiency. This paper reviews the research progress of microsphere-based scaffolds in bone/chondral tissue engineering, briefly introduces types of microspheres made from polymer, inorganic and composite materials, discusses the preparation methods of microspheres and the exploration of suitable microsphere pore size in bone and cartilage tissue engineering, and finally details the application of microsphere-based scaffolds in biomimetic scaffolds, cell proliferation and drug delivery systems.
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Affiliation(s)
- Qian Pan
- Department of Joint Surgery, The Key Laboratory of Advanced Interdisciplinary Studies Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, People's Republic of China
- Guangdong Key Laboratory of Orthopaedic Technology and Implant Materials, Advanced Interdisciplinary Studies Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, People's Republic of China
| | - Weixian Su
- Department of Joint Surgery, The Key Laboratory of Advanced Interdisciplinary Studies Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, People's Republic of China
- Guangdong Key Laboratory of Orthopaedic Technology and Implant Materials, Advanced Interdisciplinary Studies Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, People's Republic of China
| | - Yongchang Yao
- Department of Joint Surgery, The Key Laboratory of Advanced Interdisciplinary Studies Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, People's Republic of China
- Guangdong Key Laboratory of Orthopaedic Technology and Implant Materials, Advanced Interdisciplinary Studies Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, People's Republic of China
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Salerno A, Palladino A, Pizzoleo C, Attanasio C, Netti PA. Computer-aided patterning of PCL microspheres to build modular scaffolds featuring improved strength and neovascularized tissue integration. Biofabrication 2022; 14. [PMID: 35728565 DOI: 10.1088/1758-5090/ac7ad8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 06/21/2022] [Indexed: 11/11/2022]
Abstract
In the past decade, modular scaffolds prepared by assembling biocompatible and biodegradable building blocks (e.g. microspheres) have found promising applications in tissue engineering (TE) towards the repair/regeneration of damaged and impaired tissues. Nevertheless, to date this approach has failed to be transferred to the clinic due to technological limitations regarding microspheres patterning, a crucial issue for the control of scaffold strength, vascularization and integration in vivo. In this work, we propose a robust and reliable approach to address this issue through the fabrication of polycaprolactone (PCL) microsphere-based scaffolds with in-silico designed microarchitectures and high compression moduli. The scaffold fabrication technique consists of four main steps, starting with the manufacture of uniform PCL microspheres by fluidic emulsion technique. In the second step, patterned polydimethylsiloxane (PDMS) moulds were prepared by soft lithography. Then, layers of 500 µm PCL microspheres with geometrically inspired patterns were obtained by casting the microspheres onto PDMS moulds followed by their thermal sintering. Finally, three-dimensional porous scaffolds were built by the alignment, stacking and sintering of multiple (up to six) layers. The so prepared scaffolds showed excellent morphological and microstructural fidelity with respect to the in-silico models, and mechanical compression properties suitable for load bearing TE applications. Designed porosity and pore size features enabled in vitro human endothelial cells adhesion and growth as well as tissue integration and blood vessels invasion in vivo. Our results highlighted the strong impact of spatial patterning of microspheres on modular scaffolds response, and pay the way about the possibility to fabricate in silico-designed structures featuring biomimetic composition and architectures for specific TE purposes.
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Affiliation(s)
- Aurelio Salerno
- Italian Institute of Technology Center for Advanced Biomaterials for Healthcare, Largo Barsanti e Matteucci, 53, Napoli, 80125, ITALY
| | - Antonio Palladino
- University of Naples Federico II, via Federico Delpino, 1, Napoli, Campania, 80137, ITALY
| | - Carmela Pizzoleo
- Italian Institute of Technology Center for Advanced Biomaterials for Healthcare, Largo Barsanti e Matteucci 53, Napoli, 80125, ITALY
| | - Chiara Attanasio
- University of Naples Federico II, via Federico Delpino, 1, Napoli, Campania, 80137, ITALY
| | - Paolo Antonio Netti
- University of Naples Federico II Faculty of Engineering, Piazz.le Tecchio, Napoli, Campania, 80138, ITALY
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Xu W, Wei K, Lin Z, Wu T, Li G, Wang L. Storage and release of rare earth elements in microsphere-based scaffolds for enhancing osteogenesis. Sci Rep 2022; 12:6383. [PMID: 35430599 PMCID: PMC9013357 DOI: 10.1038/s41598-022-10347-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 04/06/2022] [Indexed: 11/21/2022] Open
Abstract
In osteoporosis and diabetes, it is essential to accelerate the bone repair and regeneration process. Trace rare earth elements such as lanthanum (La) ions (La3+) with appropriate concentrations are bioactive and can effectively regulate bone tissue performances. However, few well-established bone tissue engineering scaffolds can precisely and stably release La3+ to promote bone regeneration significantly. Based on the advantages of biodegradable microspheres and microsphere-based scaffolds for controlled drug release, we developed poly(lactide-co-glycolide) (PLGA)-based microsphere-based scaffolds as both three-dimensional (3D) porous scaffolds and La3+ storage and release systems for osteogenesis. So far, there is no study about microsphere-based scaffolds to release trace La3+ to induce osteogenic differentiation of bone marrow mesenchymal stromal cells (BMSCs). PLGA microspheres co-embedded with La-doped mesoporous silica (LMS) with different amounts of doped La were sintered to prepare the LMS/PLGA (LMSP) microsphere-based scaffold. The La3+ release behavior of LMSP can be controlled by adjusting the doping amount of La in mesoporous silica (MS). All these scaffolds possessed a 3D network architecture. With the increase of La doping, LMSP can better compensate for the pH decrease caused by PLGA degradation. The combination of MS and PLGA can avoid the cytotoxicity of MS alone. All prepared LMSP scaffolds were non-cytotoxic. After BMSCs were implanted on scaffolds, LMSP could promote cells adhesion, proliferation, and osteogenic differentiation. Among these microsphere-based scaffolds, LMSP-3 with stable and higher dose La3+ release behavior showed the strongest ability to enhance the osteogenesis of BMSCs. The results showed that microsphere-based scaffolds with the ability to store and stably control the release of La3+ could effectively improve osteogenic performance, which provides a new idea for the construction of bone tissue engineering scaffolds.
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Liao S, Meng H, Li J, Zhao J, Xu Y, Wang A, Xu W, Peng J, Lu S. Potential and recent advances of microcarriers in repairing cartilage defects. J Orthop Translat 2021; 27:101-109. [PMID: 33520655 PMCID: PMC7810913 DOI: 10.1016/j.jot.2020.10.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 10/13/2020] [Accepted: 10/14/2020] [Indexed: 11/11/2022] Open
Abstract
Articular cartilage regeneration is one of the challenges faced by orthopedic surgeons. Microcarrier applications have made great advances in cartilage tissue engineering in recent years and enable cost-effective cell expansion, thus providing permissive microenvironments for cells. In addition, microcarriers can be loaded with proteins, factors, and drugs for cartilage regeneration. Some microcarriers also have the advantages of injectability and targeted delivery. The application of microcarriers with these characteristics can overcome the limitations of traditional methods and provide additional advantages. In terms of the transformation potential, microcarriers have not only many advantages, such as providing sufficient and beneficial cells, factors, drugs, and microenvironments for cartilage regeneration, but also many application characteristics; for example, they can be injected to reduce invasiveness, transplanted after microtissue formation to increase efficiency, or combined with other stents to improve mechanical properties. Therefore, this technology has enormous potential for clinical transformation. In this review, we focus on recent advances in microcarriers for cartilage regeneration. We compare the characteristics of microcarriers with other methods for repairing cartilage defects, provide an overview of the advantages of microcarriers, discuss the potential of microcarrier systems, and present an outlook for future development. Translational potential of this article We reviewed the advantages and recent advances of microcarriers for cartilage regeneration. This review could give many scholars a better understanding of microcarriers, which can provide doctors with potential methods for treating patients with cartilage injure.
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Affiliation(s)
- Sida Liao
- Institute of Orthopedics/ Beijing Key Laboratory of Regenerative Medicine in Orthopedics/ Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Chinese PLA General Hospital, Beijing, 100853, China
| | - Haoye Meng
- Institute of Orthopedics/ Beijing Key Laboratory of Regenerative Medicine in Orthopedics/ Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Chinese PLA General Hospital, Beijing, 100853, China
| | - Junkang Li
- Institute of Orthopedics/ Beijing Key Laboratory of Regenerative Medicine in Orthopedics/ Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Chinese PLA General Hospital, Beijing, 100853, China
| | - Jun Zhao
- Institute of Orthopedics/ Beijing Key Laboratory of Regenerative Medicine in Orthopedics/ Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Chinese PLA General Hospital, Beijing, 100853, China
| | - Yichi Xu
- Institute of Orthopedics/ Beijing Key Laboratory of Regenerative Medicine in Orthopedics/ Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Chinese PLA General Hospital, Beijing, 100853, China
| | - Aiyuan Wang
- Institute of Orthopedics/ Beijing Key Laboratory of Regenerative Medicine in Orthopedics/ Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Chinese PLA General Hospital, Beijing, 100853, China
| | - Wenjing Xu
- Institute of Orthopedics/ Beijing Key Laboratory of Regenerative Medicine in Orthopedics/ Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Chinese PLA General Hospital, Beijing, 100853, China
| | - Jiang Peng
- Institute of Orthopedics/ Beijing Key Laboratory of Regenerative Medicine in Orthopedics/ Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Chinese PLA General Hospital, Beijing, 100853, China
| | - Shibi Lu
- Institute of Orthopedics/ Beijing Key Laboratory of Regenerative Medicine in Orthopedics/ Key Laboratory of Musculoskeletal Trauma & War Injuries PLA, Chinese PLA General Hospital, Beijing, 100853, China
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Xu W, Zhao R, Wu T, Li G, Wei K, Wang L. Biodegradable calcium carbonate/mesoporous silica/poly(lactic-glycolic acid) microspheres scaffolds with osteogenesis ability for bone regeneration. RSC Adv 2021; 11:5055-5064. [PMID: 35424439 PMCID: PMC8694637 DOI: 10.1039/d0ra09958a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/18/2021] [Indexed: 11/21/2022] Open
Abstract
Sintered microsphere-based scaffolds provide a porous structure and high-resolution spatial organization control, show great potential for bone regeneration, mainly from biodegradable biomaterials including poly(lactic-glycolic acid) (PLGA). However, acidic monomer regeneration, mainly from biodegradable biomaterials including poly(lactic-glycolic acid) (PLGA). However, acidic monomers generated by PLGA degradation tend to cause tissue inflammation, which is the central issue of PLGA-based bone regeneration scaffolds development. In this work, calcium carbonate (CC)/hexagonal mesoporous silica (HMS)/PLGA sintered microsphere-based scaffolds were developed. The scaffolds possessed a three-dimensional (3D) network structure and 30–40% porosity. The degradation results indicated that CC/HMS/PLGA scaffolds could compensate for pH increased caused by PLGA acidic byproducts effectively. Degradation results showed that CC/HMS/PLGA scaffold could effectively compensate for the pH increase caused by PLGA acidic by-products. Composite CC additives can induce the increase of adhesive proteins in the environment, which is conducive to the adhesion of cells to scaffolds. Mesenchymal stem cells (MSCs) proliferation and osteogenic differentiation were evaluated by CCK-8 assay, alkaline phosphatase (ALP) activity, ALP staining, and Alizarin Red staining. The results showed that compared with HMS/PLGA scaffolds, the proliferation of MSCs cultured with CC/HMS/PLGA scaffolds was enhanced. When cultured on the CC/HMS/PLGA scaffolds, MSCs also showed significantly enhanced ALP activity and higher calcium secretion compared with the HMS/PLGA scaffolds. CC/HMS/PLGA sintered microsphere-based scaffolds provides an attractive strategy for bone repair and regeneration with better performance. Sintered microsphere-based scaffolds provide a porous structure and high-resolution spatial organization control, show great potential for bone regeneration, mainly from biodegradable biomaterials including poly(lactic-glycolic acid) (PLGA).![]()
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Affiliation(s)
- Weikang Xu
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80.,Guangdong Provincial Bioengineering Institute (Guangzhou Sugarcane Industry Research Institute), Guangdong Academy of Sciences Jianghai Avenue Central, Haizhu District Guangzhou Guangdong 510316 China.,National Engineering Research Center for Human Tissue Restoration and Function Reconstruction, South China University of Technology Wushan Road 381 Guangzhou Guangdong 510006 China +86-757-39-38-00-98
| | - Ruifang Zhao
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80
| | - Tingting Wu
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80
| | - Guixiang Li
- Department of Scientific Research, National Engineering Research Center for Healthcare Devices, Guangdong Key Lab of Medical Electronic Instruments and Polymer Material Products, Guangdong Institute of Medical Instruments, Institute of Health Medicine, Guangdong Academy of Sciences No. 1307 Guangzhou Avenue Central, Tianhe District Guangzhou Guangdong 510500 China +86-757-87-02-35-80
| | - Kun Wei
- National Engineering Research Center for Human Tissue Restoration and Function Reconstruction, South China University of Technology Wushan Road 381 Guangzhou Guangdong 510006 China +86-757-39-38-00-98
| | - Liyan Wang
- Department of Stomatology, Foshan Woman and Children's Hospital No. 11 Renmin Xi Road, Chancheng District Foshan Guangdong 528000 China +86-757-82-96-97-89
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Lehmann J, Nürnberger S, Narcisi R, Stok KS, van der Eerden BCJ, Koevoet WJLM, Kops N, Ten Berge D, van Osch GJ. Recellularization of auricular cartilage via elastase-generated channels. Biofabrication 2019; 11:035012. [PMID: 30921774 DOI: 10.1088/1758-5090/ab1436] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Decellularized tissue matrices are promising substrates for tissue generation by stem cells to replace poorly regenerating tissues such as cartilage. However, the dense matrix of decellularized cartilage impedes colonisation by stem cells. Here, we show that digestion of elastin fibre bundles traversing auricular cartilage creates channels through which cells can migrate into the matrix. Human chondrocytes and bone marrow-derived mesenchymal stromal cells efficiently colonise elastin-treated scaffolds through these channels, restoring a glycosaminoglycan-rich matrix and improving mechanical properties while maintaining size and shape of the restored tissue. The scaffolds are also rapidly colonised by endogenous cartilage-forming cells in a subcutaneously implanted osteochondral biopsy model. Creating channels for cells in tissue matrices may be a broadly applicable strategy for recellularization and restoration of tissue function.
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Affiliation(s)
- J Lehmann
- Department of Otorhinolaryngology and Head and Neck Surgery Erasmus MC, Rotterdam, The Netherlands. Department of Cell Biology Erasmus MC, Rotterdam, The Netherlands
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Rowland CR, Glass KA, Ettyreddy AR, Gloss CC, Matthews JRL, Huynh NPT, Guilak F. Regulation of decellularized tissue remodeling via scaffold-mediated lentiviral delivery in anatomically-shaped osteochondral constructs. Biomaterials 2018; 177:161-175. [PMID: 29894913 PMCID: PMC6082159 DOI: 10.1016/j.biomaterials.2018.04.049] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/17/2018] [Accepted: 04/24/2018] [Indexed: 01/25/2023]
Abstract
Cartilage-derived matrix (CDM) has emerged as a promising scaffold material for tissue engineering of cartilage and bone due to its native chondroinductive capacity and its ability to support endochondral ossification. Because it consists of native tissue, CDM can undergo cellular remodeling, which can promote integration with host tissue and enables it to be degraded and replaced by neotissue over time. However, enzymatic degradation of decellularized tissues can occur unpredictably and may not allow sufficient time for mechanically competent tissue to form, especially in the harsh inflammatory environment of a diseased joint. The goal of the current study was to engineer cartilage and bone constructs with the ability to inhibit aberrant inflammatory processes caused by the cytokine interleukin-1 (IL-1), through scaffold-mediated delivery of lentiviral particles containing a doxycycline-inducible IL-1 receptor antagonist (IL-1Ra) transgene on anatomically-shaped CDM constructs. Additionally, scaffold-mediated lentiviral gene delivery was used to facilitate spatial organization of simultaneous chondrogenic and osteogenic differentiation via site-specific transduction of a single mesenchymal stem cell (MSC) population to overexpress either chondrogenic, transforming growth factor-beta 3 (TGF-β3), or osteogenic, bone morphogenetic protein-2 (BMP-2), transgenes. Controlled induction of IL-1Ra expression protected CDM hemispheres from inflammation-mediated degradation, and supported robust bone and cartilage tissue formation even in the presence of IL-1. In the absence of inflammatory stimuli, controlled cellular remodeling was exploited as a mechanism for fusing concentric CDM hemispheres overexpressing BMP-2 and TGF-β3 into a single bi-layered osteochondral construct. Our findings demonstrate that site-specific delivery of inducible and tunable transgenes confers spatial and temporal control over both CDM scaffold remodeling and neotissue composition. Furthermore, these constructs provide a microphysiological in vitro joint organoid model with site-specific, tunable, and inducible protein delivery systems for examining the spatiotemporal response to pro-anabolic and/or inflammatory signaling across the osteochondral interface.
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Affiliation(s)
- Christopher R Rowland
- Washington University in Saint Louis, Saint Louis, MO 63110, USA; Shriners Hospitals for Children - St. Louis, St. Louis, MO 63110, USA
| | | | | | - Catherine C Gloss
- Washington University in Saint Louis, Saint Louis, MO 63110, USA; Shriners Hospitals for Children - St. Louis, St. Louis, MO 63110, USA
| | - Jared R L Matthews
- Washington University in Saint Louis, Saint Louis, MO 63110, USA; Shriners Hospitals for Children - St. Louis, St. Louis, MO 63110, USA
| | - Nguyen P T Huynh
- Washington University in Saint Louis, Saint Louis, MO 63110, USA; Shriners Hospitals for Children - St. Louis, St. Louis, MO 63110, USA; Duke University, Durham, NC 27710, USA
| | - Farshid Guilak
- Washington University in Saint Louis, Saint Louis, MO 63110, USA; Shriners Hospitals for Children - St. Louis, St. Louis, MO 63110, USA.
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Chen J, Liu M, Duan X, Huang F, Xiang Z. [Effect of bone morphogenetic protein 7/poly (lactide-co-glycolide) microspheres on the in vitro proliferation and chondrogenic differentiation of rabbit bone marrow mesenchymal stem cells]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2018; 32:428-433. [PMID: 29806300 DOI: 10.7507/1002-1892.201711093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective To evaluate the effect of bone morphogenetic protein 7 (BMP-7)/poly (lactide-co-glycolide) (PLGA) microspheres on in vitro proliferation and chondrogenic differentiation of rabbit bone marrow mesenchymal stem cells (BMSCs). Methods BMP-7/PLGA microspheres were fabricated by double emulsion-drying in liquid method. After mixing BMP-7/PLGA microspheres with the chondrogenic differentiation medium, the supernatant was collected on the 1st, 3rd, 7th, 14th, and 21st day as the releasing solution. The BMSCs were isolated from the bilateral femurs and tibias of 3-5 days old New Zealand rabbits, and the 3rd generation BMSCs were divided into 2 groups: microspheres group and control group. The BMSCs in microspheres group were cultured by 200 μL BMP-7/PLGA microspheres releasing solution in the process of changing liquid every 2-3 days, while in control group were cultured by chondrogenic medium. The cell proliferation (by MTT assay) and the glycosaminoglycan (GAG) contents (by Alician blue staining) were detected after chondrogenic cultured for 1, 3, 7, 14, and 21 days. The chondrogenic differentiation of BMSCs was observed by safranine O staining, toluidine blue staining, and collagen type Ⅱ immunohistochemistry staining at 21 days. Results MTT test showed that BMSCs proliferated rapidly in 2 groups at 1, 3, and 7 days; after 7 days, the proliferation of BMSCs in the control group was slow and the BMSCs in microspheres group continued to proliferate rapidly. There was no significant difference of the absorbance ( A) value at 1, 3, and 7 days between 2 groups ( P>0.05), but the A value at 14 and 21 days in microspheres group was significantly higher than that in control group ( P<0.05). Compared with control group at 21 days, in microsphere group, almost all nuclei were dyed bright red by safranine O staining, almost all the nuclei appeared metachromatic purple red by toluidine blue staining, and the most nuclei were yellow or brown by immunohistochemical staining of collagen type Ⅱ. Alcian blue staining showed that the content of GAG in 2 groups increased continuously at different time points; after 7 days, the increasing trend of the control group was slow and the microspheres group continued hypersecretion. There was no significant difference of the GAG content at 1, 3, and 7 days between 2 groups ( P>0.05), but the GAG content at 14 and 21 days in microspheres group was significantly higher than that in control group ( P<0.05). Conclusion BMP-7/PLGA microspheres prepared by double emulsion-drying in liquid method in vitro can promote proliferation and chondrogenic differentiation of rabbit BMSCs.
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Affiliation(s)
- Jialei Chen
- Department of Orthopeadics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Ming Liu
- Department of Orthopeadics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Xin Duan
- Department of Orthopeadics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Fuguo Huang
- Department of Orthopeadics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Zhou Xiang
- Department of Orthopeadics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041,
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Biodiversity of CS–proteoglycan sulphation motifs: chemical messenger recognition modules with roles in information transfer, control of cellular behaviour and tissue morphogenesis. Biochem J 2018; 475:587-620. [DOI: 10.1042/bcj20170820] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Revised: 12/20/2017] [Accepted: 01/07/2018] [Indexed: 12/19/2022]
Abstract
Chondroitin sulphate (CS) glycosaminoglycan chains on cell and extracellular matrix proteoglycans (PGs) can no longer be regarded as merely hydrodynamic space fillers. Overwhelming evidence over recent years indicates that sulphation motif sequences within the CS chain structure are a source of significant biological information to cells and their surrounding environment. CS sulphation motifs have been shown to interact with a wide variety of bioactive molecules, e.g. cytokines, growth factors, chemokines, morphogenetic proteins, enzymes and enzyme inhibitors, as well as structural components within the extracellular milieu. They are therefore capable of modulating a panoply of signalling pathways, thus controlling diverse cellular behaviours including proliferation, differentiation, migration and matrix synthesis. Consequently, through these motifs, CS PGs play significant roles in the maintenance of tissue homeostasis, morphogenesis, development, growth and disease. Here, we review (i) the biodiversity of CS PGs and their sulphation motif sequences and (ii) the current understanding of the signalling roles they play in regulating cellular behaviour during tissue development, growth, disease and repair.
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10
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Gupta V, Khan Y, Berkland CJ, Laurencin CT, Detamore MS. Microsphere-Based Scaffolds in Regenerative Engineering. Annu Rev Biomed Eng 2018. [PMID: 28633566 DOI: 10.1146/annurev-bioeng-071516-044712] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Microspheres have long been used in drug delivery applications because of their controlled release capabilities. They have increasingly served as the fundamental building block for fabricating scaffolds for regenerative engineering because of their ability to provide a porous network, offer high-resolution control over spatial organization, and deliver growth factors/drugs and/or nanophase materials. Because they provide physicochemical gradients via spatiotemporal release of bioactive factors and nanophase ceramics, microspheres are a desirable tool for engineering complex tissues and biological interfaces. In this review we describe various methods for microsphere fabrication and sintering, and elucidate how these methods influence both micro- and macroscopic scaffold properties, with a special focus on the nature of sintering. Furthermore, we review key applications of microsphere-based scaffolds in regenerating various tissues. We hope to inspire researchers to join a growing community of investigators using microspheres as tissue engineering scaffolds so that their full potential in regenerative engineering may be realized.
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Affiliation(s)
- Vineet Gupta
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66045;
| | - Yusuf Khan
- Department of Orthopaedic Surgery, University of Connecticut Health Campus, Farmington, Connecticut 06030; , .,Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269.,Institute for Regenerative Engineering, University of Connecticut Health Campus, Farmington, Connecticut 06030
| | - Cory J Berkland
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66045; .,Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045;
| | - Cato T Laurencin
- Department of Orthopaedic Surgery, University of Connecticut Health Campus, Farmington, Connecticut 06030; , .,Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269.,Institute for Regenerative Engineering, University of Connecticut Health Campus, Farmington, Connecticut 06030
| | - Michael S Detamore
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73019;
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Farrugia BL, Lord MS, Whitelock JM, Melrose J. Harnessing chondroitin sulphate in composite scaffolds to direct progenitor and stem cell function for tissue repair. Biomater Sci 2018; 6:947-957. [DOI: 10.1039/c7bm01158j] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This review details the inclusion of chondroitin sulphate in bioscaffolds for superior functional properties in tissue regenerative applications.
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Affiliation(s)
- B. L. Farrugia
- Graduate School of Biomedical Engineering
- UNSW Sydney 2052
- Australia
| | - M. S. Lord
- Graduate School of Biomedical Engineering
- UNSW Sydney 2052
- Australia
| | - J. M. Whitelock
- Graduate School of Biomedical Engineering
- UNSW Sydney 2052
- Australia
| | - J. Melrose
- Graduate School of Biomedical Engineering
- UNSW Sydney 2052
- Australia
- Raymond Purves Bone and Joint Research Laboratory
- Kolling Institute Northern Sydney Local Health District
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