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van der Kraan PM, van Caam AP, Blaney Davidson EN, van den Bosch MH, van de Loo FA. Growth factors that drive aggrecan synthesis in healthy articular cartilage. Role for transforming growth factor-β? OSTEOARTHRITIS AND CARTILAGE OPEN 2024; 6:100459. [PMID: 38486843 PMCID: PMC10938168 DOI: 10.1016/j.ocarto.2024.100459] [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: 12/21/2023] [Accepted: 03/04/2024] [Indexed: 03/17/2024] Open
Abstract
Introduction Articular cartilage makes smooth movement possible and destruction of this tissue leads to loss of joint function. An important biomolecule that determines this function is the large aggregating proteoglycan of cartilage, aggrecan. Aggrecan has a relatively short half-life in cartilage and therefore continuous production of this molecule is essential. Methods In this narrative review we discuss what is the role of growth factors in driving the synthesis of aggrecan in articular cartilage. A literature search has been done using the search items; cartilage, aggrecan, explant, Transforming Growth factor-β (TGF-β), Insulin-like Growth Factor (IGF), Bone Morphogenetic Protein (BMP) and the generic term "growth factors". Focus has been on studies using healthy cartilage and models of cartilage regeneration have been excluded. Results In healthy adult articular cartilage IGF is the main factor that drives aggrecan synthesis and maintains adequate levels of production. BMP's and TGF-β have a very limited role but appear to be more important during chondrogenesis and cartilage development. The major role of TGF-β is not stimulation of aggrecan synthesis but maintenance of the differentiated articular cartilage chondrocyte phenotype. Conclusion TGF-β is a factor that is generally considered as an important factor in stimulating aggrecan synthesis in cartilage but its role in this might be very restrained in healthy, adult articular cartilage.
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Affiliation(s)
| | - Arjan P.M. van Caam
- Radboudumc, Experimental Rheumatology, Department of Rheumatology, PO Box 9101, 6500 HB Nijmegen, the Netherlands
| | - Esmeralda N. Blaney Davidson
- Radboudumc, Experimental Rheumatology, Department of Rheumatology, PO Box 9101, 6500 HB Nijmegen, the Netherlands
| | - Martijn H.J. van den Bosch
- Radboudumc, Experimental Rheumatology, Department of Rheumatology, PO Box 9101, 6500 HB Nijmegen, the Netherlands
| | - Fons A.J. van de Loo
- Radboudumc, Experimental Rheumatology, Department of Rheumatology, PO Box 9101, 6500 HB Nijmegen, the Netherlands
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Ballout N, Boullier A, Darwiche W, Ait-Mohand K, Trécherel E, Gallégo T, Gomila C, Yaker L, Gennero I, Kovensky J, Ausseil J, Toumieux S. DP2, a Carbohydrate Derivative, Enhances In Vitro Osteoblast Mineralisation. Pharmaceuticals (Basel) 2023; 16:1512. [PMID: 38004380 PMCID: PMC10674337 DOI: 10.3390/ph16111512] [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: 09/18/2023] [Revised: 10/14/2023] [Accepted: 10/17/2023] [Indexed: 11/26/2023] Open
Abstract
Bone fracture healing is a complex biological process involving four phases coordinated over time: hematoma formation, granulation tissue formation, bony callus formation, and bone remodelling. Bone fractures represent a significant health problem, particularly among the elderly population and patients with comorbidities. Therapeutic strategies proposed to treat such fractures include the use of autografts, allografts, and tissue engineering strategies. It has been shown that bone morphogenetic protein 2 (BMP-2) has a therapeutic potential to enhance fracture healing. Despite the clinical efficacy of BMP-2 in osteoinduction and bone repair, adverse side effects and complications have been reported. Therefore, in this in vitro study, we propose the use of a disaccharide compound (DP2) to improve the mineralisation process. We first evaluated the effect of DP2 on primary human osteoblasts (HOb), and then investigated the mechanisms involved. Our findings showed that (i) DP2 improved osteoblast differentiation by inducing alkaline phosphatase activity, osteopontin, and osteocalcin expression; (ii) DP2 induced earlier in vitro mineralisation in HOb cells compared to BMP-2 mainly by earlier activation of Runx2; and (iii) DP2 is internalized in HOb cells and activates the protein kinase C signalling pathway. Consequently, DP2 is a potential therapeutical candidate molecule for bone fracture repair.
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Affiliation(s)
- Nissrine Ballout
- Société d’Accélération du Transfert de Technologie-Nord, 59800 Lille, France; (N.B.)
- Institut Toulousain des Maladies Infectieuses et Inflammatoires, INSERM UMR1291, CNRS UMR5051, University of Toulouse III, 31024 Toulouse, France
- Service de Biochimie, Institut Fédératif de Biologie, CHU Toulouse, 31024 Toulouse, France
| | - Agnès Boullier
- Mécanismes Physiopathologiques et Conséquences des Calcifications Cardiovasculaires, UR7517, Centre Universitaire de Recherche en Santé, CURS-UPJV, University of Picardy Jules Verne, 80054 Amiens, France (E.T.)
- Laboratory of Biochemistry, CHU Amiens-Picardie, 80054 Amiens, France
| | - Walaa Darwiche
- Société d’Accélération du Transfert de Technologie-Nord, 59800 Lille, France; (N.B.)
| | - Katia Ait-Mohand
- Laboratoire de Glycochimie et des Agroressources d’Amiens, UR 7378, CNRS, Université de Picardie Jules Verne, 80039 Amiens, France
| | - Eric Trécherel
- Mécanismes Physiopathologiques et Conséquences des Calcifications Cardiovasculaires, UR7517, Centre Universitaire de Recherche en Santé, CURS-UPJV, University of Picardy Jules Verne, 80054 Amiens, France (E.T.)
| | - Théo Gallégo
- Société d’Accélération du Transfert de Technologie-Nord, 59800 Lille, France; (N.B.)
| | - Cathy Gomila
- Mécanismes Physiopathologiques et Conséquences des Calcifications Cardiovasculaires, UR7517, Centre Universitaire de Recherche en Santé, CURS-UPJV, University of Picardy Jules Verne, 80054 Amiens, France (E.T.)
| | - Linda Yaker
- Mécanismes Physiopathologiques et Conséquences des Calcifications Cardiovasculaires, UR7517, Centre Universitaire de Recherche en Santé, CURS-UPJV, University of Picardy Jules Verne, 80054 Amiens, France (E.T.)
| | - Isabelle Gennero
- Institut Toulousain des Maladies Infectieuses et Inflammatoires, INSERM UMR1291, CNRS UMR5051, University of Toulouse III, 31024 Toulouse, France
- Service de Biochimie, Institut Fédératif de Biologie, CHU Toulouse, 31024 Toulouse, France
| | - José Kovensky
- Laboratoire de Glycochimie et des Agroressources d’Amiens, UR 7378, CNRS, Université de Picardie Jules Verne, 80039 Amiens, France
| | - Jérôme Ausseil
- Institut Toulousain des Maladies Infectieuses et Inflammatoires, INSERM UMR1291, CNRS UMR5051, University of Toulouse III, 31024 Toulouse, France
- Service de Biochimie, Institut Fédératif de Biologie, CHU Toulouse, 31024 Toulouse, France
| | - Sylvestre Toumieux
- Laboratoire de Glycochimie et des Agroressources d’Amiens, UR 7378, CNRS, Université de Picardie Jules Verne, 80039 Amiens, France
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Ren Y, Fan L, Alkildani S, Liu L, Emmert S, Najman S, Rimashevskiy D, Schnettler R, Jung O, Xiong X, Barbeck M. Barrier Membranes for Guided Bone Regeneration (GBR): A Focus on Recent Advances in Collagen Membranes. Int J Mol Sci 2022; 23:ijms232314987. [PMID: 36499315 PMCID: PMC9735671 DOI: 10.3390/ijms232314987] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/25/2022] [Accepted: 11/25/2022] [Indexed: 12/02/2022] Open
Abstract
Guided bone regeneration (GBR) has become a clinically standard modality for the treatment of localized jawbone defects. Barrier membranes play an important role in this process by preventing soft tissue invasion outgoing from the mucosa and creating an underlying space to support bone growth. Different membrane types provide different biological mechanisms due to their different origins, preparation methods and structures. Among them, collagen membranes have attracted great interest due to their excellent biological properties and desired bone regeneration results to non-absorbable membranes even without a second surgery for removal. This work provides a comparative summary of common barrier membranes used in GBR, focusing on recent advances in collagen membranes and their biological mechanisms. In conclusion, the review article highlights the biological and regenerative properties of currently available barrier membranes with a particular focus on bioresorbable collagen-based materials. In addition, the advantages and disadvantages of these biomaterials are highlighted, and possible improvements for future material developments are summarized.
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Affiliation(s)
- Yanru Ren
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany
- BerlinAnalytix GmbH, 12109 Berlin, Germany
| | - Lu Fan
- NMI Natural and Medical Sciences Institute, University of Tübingen, 72770 Reutlingen, Germany
| | | | - Luo Liu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100013, China
| | - Steffen Emmert
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany
| | - Stevo Najman
- Scientific Research Center for Biomedicine, Department for Cell and Tissue Engineering, Faculty of Medicine, University of Niš, 18000 Niš, Serbia
- Department of Biology and Human Genetics, Faculty of Medicine, University of Niš, 18000 Niš, Serbia
| | - Denis Rimashevskiy
- Department of Traumatology and Orthopedics, Peoples’ Friendship University of Russia, 117198 Moscow, Russia
| | - Reinhard Schnettler
- University Medical Centre, Justus Liebig University of Giessen, 35390 Giessen, Germany
| | - Ole Jung
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany
| | - Xin Xiong
- NMI Natural and Medical Sciences Institute, University of Tübingen, 72770 Reutlingen, Germany
| | - Mike Barbeck
- Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, 18057 Rostock, Germany
- BerlinAnalytix GmbH, 12109 Berlin, Germany
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100013, China
- Correspondence: ; Tel.: +49-(0)-176-81022467
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Watson-Levings RS, Palmer GD, Levings PP, Dacanay EA, Evans CH, Ghivizzani SC. Gene Therapy in Orthopaedics: Progress and Challenges in Pre-Clinical Development and Translation. Front Bioeng Biotechnol 2022; 10:901317. [PMID: 35837555 PMCID: PMC9274665 DOI: 10.3389/fbioe.2022.901317] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/27/2022] [Indexed: 11/25/2022] Open
Abstract
In orthopaedics, gene-based treatment approaches are being investigated for an array of common -yet medically challenging- pathologic conditions of the skeletal connective tissues and structures (bone, cartilage, ligament, tendon, joints, intervertebral discs etc.). As the skeletal system protects the vital organs and provides weight-bearing structural support, the various tissues are principally composed of dense extracellular matrix (ECM), often with minimal cellularity and vasculature. Due to their functional roles, composition, and distribution throughout the body the skeletal tissues are prone to traumatic injury, and/or structural failure from chronic inflammation and matrix degradation. Due to a mixture of environment and endogenous factors repair processes are often slow and fail to restore the native quality of the ECM and its function. In other cases, large-scale lesions from severe trauma or tumor surgery, exceed the body’s healing and regenerative capacity. Although a wide range of exogenous gene products (proteins and RNAs) have the potential to enhance tissue repair/regeneration and inhibit degenerative disease their clinical use is hindered by the absence of practical methods for safe, effective delivery. Cumulatively, a large body of evidence demonstrates the capacity to transfer coding sequences for biologic agents to cells in the skeletal tissues to achieve prolonged delivery at functional levels to augment local repair or inhibit pathologic processes. With an eye toward clinical translation, we discuss the research progress in the primary injury and disease targets in orthopaedic gene therapy. Technical considerations important to the exploration and pre-clinical development are presented, with an emphasis on vector technologies and delivery strategies whose capacity to generate and sustain functional transgene expression in vivo is well-established.
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Affiliation(s)
- Rachael S. Watson-Levings
- Department of Orthopaedic Surgery and Sports Medicine, University of Florida College of Medicine, Gainesville, FL, United States
| | - Glyn D. Palmer
- Department of Orthopaedic Surgery and Sports Medicine, University of Florida College of Medicine, Gainesville, FL, United States
| | - Padraic P. Levings
- Department of Orthopaedic Surgery and Sports Medicine, University of Florida College of Medicine, Gainesville, FL, United States
| | - E. Anthony Dacanay
- Department of Orthopaedic Surgery and Sports Medicine, University of Florida College of Medicine, Gainesville, FL, United States
| | - Christopher H. Evans
- Rehabilitation Medicine Research Center, Mayo Clinic, Rochester, MI, United States
| | - Steven C. Ghivizzani
- Department of Orthopaedic Surgery and Sports Medicine, University of Florida College of Medicine, Gainesville, FL, United States
- *Correspondence: Steven C. Ghivizzani,
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Shi P, Zhou W, Dong J, Li S, Lv P, Liu C. Scaffolds of bioactive glass (Bioglass®) combined with recombinant human bone morphogenetic protein -9 (rhBMP-9) for tooth extraction site preservation. Heliyon 2022; 8:e08796. [PMID: 35097232 PMCID: PMC8783125 DOI: 10.1016/j.heliyon.2022.e08796] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 08/08/2021] [Accepted: 01/13/2022] [Indexed: 12/23/2022] Open
Abstract
Objective The study aimed to investigate the osteogenic ability of bioactive glass (bioglass) combined with recombinant human bone morphogenetic protein-9 (rhBMP-9) on rat bone marrow mesenchymal stem cells (BMSCs) in vitro. The study also compares bone regeneration using rhBMP9 soaked with different carrier systems, including bioglass or collagen membranes (BioGide, BG) in a rat alveolar bone site preservation model in vivo. Methods Scanning electron microscopy was employed to analyze bioglass surface. The absorption and release potential of rhBMP9 from bioglass were researched by ELISA. The cell viability, adhesion, proliferation, and differentiation were assessed for rhBMP9 soaked on bioglass by cck-8 kit, alkaline phosphatase (ALP) activity assay, alizarin red staining, and real-time PCR. Furthermore, prepared grafts (bioglass + BG, bioglass/rhBMP9+BG, and bioglass + BG/rhBMP9) were implanted into the maxillary right first incisor sockets of Sprague Dawley rats for 8 weeks, and new bone formation was quantified by micro-CT and histological analysis. Results Bioglass absorbed rhBMP9 dramatically and released it with a slow and stable speed within ten days by ELISA. When used with cck-8 kit detection, cell viability at 24 h, cell adhesion rate at 8 h, and cell proliferation at 1, 3, and 5 days were decreased in the bioglass alone group versus the control group but slightly increased with the addition of rhBMP9. Similarly, the effect of osteogenic differentiation on bioglass increased significantly when combined with rhBMP9 by upregulating the expression of ALP, mineralized matrix, and osteogenic related genes. Furthermore, both bioglass/rhBMP9+BG samples and bioglass + BG/rhBMP9 samples significantly improved several bone formation parameters compared with bioglass + BG samples. Interestingly, bioglass + BG/rhBMP9 samples demonstrated more bone regeneration in rat site preservation models. Conclusions Both bioglass and BG can be applied in GBR surgery as effective carriers of rhBMP9. However, BG may be more suitable than bioglass for investigating site preservation effect after tooth extraction when associated with rhBMP9 and provides a practical clinical solution to the problem of bone deficiency caused by alveolar bone atrophy.
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Freitas GP, Lopes HB, Souza ATP, Gomes MPO, Quiles GK, Gordon J, Tye C, Stein JL, Stein GS, Lian JB, Beloti MM, Rosa AL. Mesenchymal stem cells overexpressing BMP-9 by CRISPR-Cas9 present high in vitro osteogenic potential and enhance in vivo bone formation. Gene Ther 2021; 28:748-759. [PMID: 33686254 PMCID: PMC8423866 DOI: 10.1038/s41434-021-00248-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 02/16/2021] [Accepted: 02/19/2021] [Indexed: 12/20/2022]
Abstract
Cell therapy is a valuable strategy for the replacement of bone grafts and repair bone defects, and mesenchymal stem cells (MSCs) are the most frequently used cells. This study was designed to genetically edit MSCs to overexpress bone morphogenetic protein 9 (BMP-9) using Clustered Regularly Interspaced Short Palindromic Repeats/associated nuclease Cas9 (CRISPR-Cas9) technique to generate iMSCs-VPRBMP-9+, followed by in vitro evaluation of osteogenic potential and in vivo enhancement of bone formation in rat calvaria defects. Overexpression of BMP-9 was confirmed by its gene expression and protein expression, as well as its targets Hey-1, Bmpr1a, and Bmpr1b, Dlx-5, and Runx2 and protein expression of SMAD1/5/8 and pSMAD1/5/8. iMSCs-VPRBMP-9+ displayed significant changes in the expression of a panel of genes involved in TGF-β/BMP signaling pathway. As expected, overexpression of BMP-9 increased the osteogenic potential of MSCs indicated by increased gene expression of osteoblastic markers Runx2, Sp7, Alp, and Oc, higher ALP activity, and matrix mineralization. Rat calvarial bone defects treated with injection of iMSCs-VPRBMP-9+ exhibited increased bone formation and bone mineral density when compared with iMSCs-VPR- and phosphate buffered saline (PBS)-injected defects. This is the first study to confirm that CRISPR-edited MSCs overexpressing BMP-9 effectively enhance bone formation, providing novel options for exploring the capability of genetically edited cells to repair bone defects.
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Affiliation(s)
- Gileade P Freitas
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Helena B Lopes
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Alann T P Souza
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Maria Paula O Gomes
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Georgia K Quiles
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Jonathan Gordon
- Department of Biochemistry, University of Vermont School of Medicine, Burlington, VT, USA
| | - Coralee Tye
- Department of Biochemistry, University of Vermont School of Medicine, Burlington, VT, USA
| | - Janet L Stein
- Department of Biochemistry, University of Vermont School of Medicine, Burlington, VT, USA
| | - Gary S Stein
- Department of Biochemistry, University of Vermont School of Medicine, Burlington, VT, USA
| | - Jane B Lian
- Department of Biochemistry, University of Vermont School of Medicine, Burlington, VT, USA
| | - Marcio M Beloti
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Adalberto L Rosa
- Bone Research Lab, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
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Wang L, Li X, Song Y, Zhang L, Ye L, Zhou X, Song D, Huang D. NELL1 Augments Osteogenesis and Inhibits Inflammation of Human Periodontal Ligament Stem Cells Induced by BMP9. J Periodontol 2021; 93:977-987. [PMID: 34647317 DOI: 10.1002/jper.20-0517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/24/2021] [Accepted: 09/26/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND Periodontitis could lead to periodontal destruction such as the loss of alveolar bone. The issue that how to achieve the regeneration of alveolar bone and periodontal tissues under the inflammatory environment needs to be solved urgently. BMP9 is one of the most potent osteo-inductive BMPs and induces osteogenic differentiation of mesenchymal stem cells (MSCs). The aim of this study is to explore the possible effect of BMP9 on the osteogenic differentiation of inflammatory periodontal ligament stem cells (PDLSCs). METHODS Human PDLSCs were cultured in osteo-inductive medium with 1μg/mL lipopolysaccharide Porphyromonas gingivitis (LPS-PG). Adenoviral vector expressing system was used to overexpress target genes. In vitro expression of osteogenic markers was assessed by quantitative reverse transcription PCR, western blotting, alkaline phosphatase assay, and alizarin red staining. Subcutaneous implantation nude mice models were used to evaluate the effects of BMP9 on PDLSCs in vivo. Micro-CT, H&E staining, and trichrome staining were performed to assess ectopic bone formation. RESULTS In the LPS-PG induced inflammatory environment, BMP9 promoted osteogenic differentiation of PDLSCs, but upregulated the expression of inflammatory markers (P>0.05); NELL1 downregulated the expression of inflammation genes in PDLSCs induced by BMP9, while augmenting BMP9 induced osteogenesis of the cells both in vitro and in vivo. In the above process, the MAPK/p38/ERK signaling pathway was triggered by NELL1. CONCLUSION The combination use of BMP9 and NELL1 might have the potential to promote the regeneration of alveolar bone in periodontitis. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Liu Wang
- State Key Laboratory of Oral Diseases & National Clinical Research Center of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Xiangfen Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Yao Song
- State Key Laboratory of Oral Diseases & National Clinical Research Center of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Lan Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Ling Ye
- State Key Laboratory of Oral Diseases & National Clinical Research Center of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Dongzhe Song
- State Key Laboratory of Oral Diseases & National Clinical Research Center of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.,Department of Operative Dentistry and Endodontics West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Dingming Huang
- State Key Laboratory of Oral Diseases & National Clinical Research Center of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China.,Department of Operative Dentistry and Endodontics West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
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Fujioka-Kobayashi M, Marjanowski SD, Kono M, Hino S, Saulacic N, Schaller B. Osteoinductive potential of recombinant BMP-9 in bone defects of mice treated with antiresorptive agents. Int J Oral Maxillofac Surg 2021; 51:566-575. [PMID: 34454793 DOI: 10.1016/j.ijom.2021.08.014] [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: 02/12/2021] [Revised: 05/19/2021] [Accepted: 08/12/2021] [Indexed: 11/26/2022]
Abstract
The aim of the present study was to investigate the effects of recombinant human (rh)BMP-9 on bone regenerative potential in a mouse model of antibody-mediated antiresorptive therapy (AMART). A monoclonal anti-murine receptor activator of nuclear factor-kappa B ligand (RANKL) antibody (mAb) was used to create an AMART model in mice. rhBMP-9 combined with collagen membrane was implanted in calvarial defects in mAb-treated mice. After 4 weeks, the bone formative potential in the defects was evaluated by micro-computed tomography and histological approaches. The groups implanted with rhBMP-9-containing collagen membranes demonstrated substantial osteopromotive potential, with significantly greater new bone volume (Sham + BMP-9 group; 0.86 ± 0.29 mm3 and mAb + BMP-9 group; 0.64 ± 0.16 mm3) than control PBS-membranes (Sham + PBS group; 0.44 ± 0.29 mm3 and mAb + PBS group; 0.24 ± 0.12 mm3) in both sham and mAb-treated mice. In line with in vivo study, bone marrow cells isolated from both sham and mAb-treated mice confirmed greater osteogenic potential upon stimulation with rhBMP-9 in vitro. These findings suggest for the first time that local rhBMP-9 administration might be a strategy to accelerate bone regeneration in the context of AMART.
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Affiliation(s)
- M Fujioka-Kobayashi
- Department of Cranio-Maxillofacial Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; Department of Oral and Maxillofacial Surgery, School of Life Dentistry at Tokyo, The Nippon Dental University, Tokyo, Japan.
| | - S D Marjanowski
- Department of Cranio-Maxillofacial Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - M Kono
- Department of Cranio-Maxillofacial Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; Department of Oral and Maxillofacial Surgery, Tokyo Medical University, Tokyo, Japan
| | - S Hino
- Department of Cranio-Maxillofacial Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland; Department of Oral and Maxillofacial Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - N Saulacic
- Department of Cranio-Maxillofacial Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - B Schaller
- Department of Cranio-Maxillofacial Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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9
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Gaihre B, Bharadwaz A, Unagolla JM, Jayasuriya AC. Evaluation of the optimal dosage of BMP-9 through the comparison of bone regeneration induced by BMP-9 versus BMP-2 using an injectable microparticle embedded thermosensitive polymeric carrier in a rat cranial defect model. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 127:112252. [PMID: 34225891 PMCID: PMC8260961 DOI: 10.1016/j.msec.2021.112252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 05/03/2021] [Accepted: 06/07/2021] [Indexed: 01/07/2023]
Abstract
Bone morphogenetic proteins (BMPs) are well known as enhancers and facilitators of osteogenesis during bone regeneration. The use of recombinant BMP-2 (rhBMP-2) in bone defect healing has drawbacks, which has driven the scouting for alternatives, such as recombinant BMP-9 (rhBMP-9), to provide comparable new bone formation. However, the dosage of rhBMP-9 is quintessential for the facilitation of adequate bone defect healing. Therefore, this study has been designed to evaluate the optimal dosage of BMP-9 by comparing the bone defect healing induced by rhBMP-9 over rhBMP-2. The chitosan (CS) microparticles (MPs), coated with BMPs, were embedded in a thermoresponsive methylcellulose (MC) and calcium alginate (Alg) based injectable delivery system containing a dosage of either 0.5 μg or 1.5 μg of the respective rhBMP per bone defect. A 5 mm critical-sized cranial defect rat model has been used in this study, and bone tissues were harvested at eight weeks post-surgery. The standard tools for comparing the new bone regeneration included micro computerized tomography (micro-CT) and histological analysis. A novel perspective of analyzing the new bone quality and crystallinity was employed by using Raman spectroscopy, along with its elastic modulus quantified through Atomic Force Microscopy (AFM). Results showed that the rhBMP-9 administered at a dosage of 1.5 μg per bone defect, using this delivery system, can adequately facilitate the bone void filling with ample new bone mineralization and crystallinity as compared to rhBMP-2, thus approving the hypothesis for a viable rhBMP-2 alternative.
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Affiliation(s)
- Bipin Gaihre
- Biomedical Engineering Program, Department of Bioengineering, College of Engineering, The University of Toledo, Toledo, OH 43607, USA
| | - Angshuman Bharadwaz
- Biomedical Engineering Program, Department of Bioengineering, College of Engineering, The University of Toledo, Toledo, OH 43607, USA
| | - Janitha M Unagolla
- Biomedical Engineering Program, Department of Bioengineering, College of Engineering, The University of Toledo, Toledo, OH 43607, USA
| | - Ambalangodage C Jayasuriya
- Biomedical Engineering Program, Department of Bioengineering, College of Engineering, The University of Toledo, Toledo, OH 43607, USA; Department of Orthopaedic Surgery, College of Medicine and Life Sciences, The University of Toledo, Toledo, OH 43614, USA.
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Ebe Y, Nakamura T, Hasegawa-Nakamura K, Noguchi K. Effect of interleukin-1β on bone morphogenetic protein-9-induced osteoblastic differentiation of human periodontal ligament fibroblasts. Eur J Oral Sci 2021; 129:e12792. [PMID: 33945653 DOI: 10.1111/eos.12792] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/16/2021] [Accepted: 03/31/2021] [Indexed: 02/04/2023]
Abstract
Bone morphogenetic protein-9 (BMP-9) has been shown to potently induce osteoblastic differentiation of periodontal ligament fibroblasts (PDLFs) and may be a candidate therapeutic agent for periodontal tissue healing/regeneration, but the effect of the inflammatory environment of periodontitis on such approaches is unclear. We investigated whether interleukin-1β (IL-1β) affected BMP-9-mediated osteoblastic differentiation of human (h) PDLFs. IL-1β suppressed BMP-9-induced osteogenic differentiation of hPDLFs, as evidenced by reduced alkaline phosphatase (ALP) activity and mineralization, and the downregulated expression of BMP-9-mediated bone-related genes, RUNX2, SP7, IBSP, and SPP1. In hPDLFs, with or without BMP-9, IL-1β increased the protein expression of activin A, a BMP-9 antagonist, and decreased follistatin protein, an antagonist of activin A. Similarly, IL-1β upregulated the expression of the activin A gene and downregulated that of the follistatin gene. Notably, follistatin re-established BMP-9-induced ALP activity suppressed by IL-1β. Activin A inhibited the expression of BMP-9-responsive genes and BMP-9-induced ALP activity, while follistatin re-established them. Finally, extracellular signal-regulated kinase 1/2 (ERK1/2), p38, and nuclear factor-kappa B (NF-κB) inhibition significantly blocked IL-1β-induced activin A gene expression. Our data indicate that IL-1β inhibits BMP-9-induced osteoblastic differentiation of hPDLFs, possibly by promoting activin A production via the ERK1/2, p38, and NF-κB pathways.
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Affiliation(s)
- Yukari Ebe
- Division of Clinical Engineering, Department of Dental Hygiene, Kagoshima University Hospital, Kagoshima, Japan
| | - Toshiaki Nakamura
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kozue Hasegawa-Nakamura
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Kazuyuki Noguchi
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
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Imafuji T, Shirakata Y, Shinohara Y, Nakamura T, Noguchi K. Enhanced bone formation of calvarial bone defects by low-intensity pulsed ultrasound and recombinant human bone morphogenetic protein-9: a preliminary experimental study in rats. Clin Oral Investig 2021; 25:5917-5927. [PMID: 33755786 DOI: 10.1007/s00784-021-03897-6] [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: 11/23/2020] [Accepted: 03/18/2021] [Indexed: 01/24/2023]
Abstract
OBJECTIVES The aim of this study was to evaluate the combined effects of recombinant human bone morphogenetic protein - 9 (rhBMP-9) loaded onto absorbable collagen sponges (ACS) and low-intensity pulsed ultrasound (LIPUS) on bone formation in rat calvarial defects. MATERIALS AND METHODS Circular calvarial defects were surgically created in 18 Wistar rats, which were divided into LIPUS-applied (+) and LIPUS-non-applied (-) groups. The 36 defects in each group received ACS implantation (ACS group), ACS with rhBMP-9 (rhBMP-9/ACS group), or surgical control (control group), yielding the following six groups: ACS (+/-), rhBMP-9/ACS (+/-), and control (+/-). The LIPUS-applied groups received daily LIPUS exposure starting immediately after surgery. At 4 weeks, animals were sacrificed and their defects were investigated histologically and by microcomputed tomography. RESULTS Postoperative clinical healing was uneventful at all sites. More new bone was observed in the LIPUS-applied groups compared with the LIPUS-non-applied groups. Newly formed bone area (NBA)/total defect area (TA) in the ACS (+) group (46.49 ± 7.56%) was significantly greater than that observed in the ACS (-) (34.31 ± 5.68%) and control (-) (31.13 ± 6.74%) groups (p < 0.05). The rhBMP-9/ACS (+) group exhibited significantly greater bone volume, NBA, and NBA/TA than the rhBMP-9/ACS (-) group (2.46 ± 0.65 mm3 vs. 1.76 ± 0.44 mm3, 1.25 ± 0.31 mm2 vs. 0.88 ± 0.22 mm2, and 62.80 ± 11.87% vs. 42.66 ± 7.03%, respectively) (p < 0.05). Furthermore, the rhBMP-9/ ACS (+) group showed the highest level of bone formation among all groups. CONCLUSION Within their limits, it can be concluded that LIPUS had osteopromotive potential and enhanced rhBMP-9-induced bone formation in calvarial defects of rats. CLINICAL RELEVANCE The use of rhBMP-9 with LIPUS stimulation can be a potential bone regenerative therapy for craniofacial/peri-implant bone defects.
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Affiliation(s)
- Takatomo Imafuji
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Yoshinori Shirakata
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.
| | - Yukiya Shinohara
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Toshiaki Nakamura
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Kazuyuki Noguchi
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
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12
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Bharadwaz A, Jayasuriya AC. Osteogenic differentiation cues of the bone morphogenetic protein-9 (BMP-9) and its recent advances in bone tissue regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 120:111748. [PMID: 33545890 PMCID: PMC7867678 DOI: 10.1016/j.msec.2020.111748] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 11/14/2020] [Accepted: 11/21/2020] [Indexed: 02/07/2023]
Abstract
Bone regeneration using bioactive molecules and biocompatible materials is growing steadily with the advent of the new findings in cellular signaling. Bone Morphogenetic Protein (BMP)-9 is a considerably recent discovery from the BMP family that delivers numerous benefits in osteogenesis. The Smad cellular signaling pathway triggered by BMPs is often inhibited by Noggin. However, BMP-9 is resistant to Noggin, thus, facilitating a more robust cellular differentiation of osteoprogenitor cells into preosteoblasts and osteoblasts. This review encompasses a general understanding of the Smad signaling pathway activated by the BMP-9 ligand molecule with its specific receptors. The robust osteogenic cellular differentiation cue provided by BMP-9 has been reviewed from a bone regeneration perspective with several in vitro as well as in vivo studies reporting promising results for future research. The effect of the biomaterial, chosen in such studies as the scaffold or carrier matrix, on the activity of BMP-9 and subsequent bone regeneration has been highlighted in this review. The non-viral delivery technique for BMP-9 induced bone regeneration is a safer alternative to its viral counterpart. The recent advances in non-viral BMP-9 delivery have also highlighted the efficacy of the protein molecule at a low dosage. This opens a new horizon as a more efficient and safer alternative to BMP-2, which was prevalent among clinical trials; however, BMP-2 applications have reported its downsides during bone defect healing such as cystic bone formation.
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Affiliation(s)
- Angshuman Bharadwaz
- Biomedical Engineering Program, Department of Bioengineering, College of Engineering, The University of Toledo, Toledo, OH, USA
| | - Ambalangodage C Jayasuriya
- Biomedical Engineering Program, Department of Bioengineering, College of Engineering, The University of Toledo, Toledo, OH, USA; Department of Orthopaedic Surgery, College of Medicine and Life Sciences, The University of Toledo, Toledo, OH, USA.
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13
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BMP9 is a potential therapeutic agent for use in oral and maxillofacial bone tissue engineering. Biochem Soc Trans 2020; 48:1269-1285. [PMID: 32510140 DOI: 10.1042/bst20200376] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/08/2020] [Accepted: 05/15/2020] [Indexed: 02/07/2023]
Abstract
Oral and maxillofacial surgery is often challenging due to defective bone healing owing to the microbial environment of the oral cavity, the additional involvement of teeth and esthetic concerns. Insufficient bone volume as a consequence of aging and some oral and maxillofacial surgical procedures, such as tumor resection of the jaw, may further impact facial esthetics and cause the failure of certain procedures, such as oral and maxillofacial implantation. Bone morphogenetic protein (BMP) 9 (BMP9) is one of the most effective BMPs to induce the osteogenic differentiation of different stem cells. A large cross-talk network that includes the BMP9, Wnt/β, Hedgehog, EGF, TGF-β and Notch signaling pathways finely regulates osteogenesis induced by BMP9. Epigenetic control during BMP9-induced osteogenesis is mainly dependent on histone deacetylases (HDACs), microRNAs (miRNAs) and long noncoding RNAs (lncRNAs), which adds another layer of complexity. As a result, all these factors work together to orchestrate the molecular and cellular events underlying BMP9-related tissue engineering. In this review, we summarize our current understanding of the SMAD-dependent and SMAD-independent BMP9 pathways, with a particular focus on cross-talk and cross-regulation between BMP9 and other major signaling pathways in BMP9-induced osteogenesis. Furthermore, recently discovered epigenetic regulation of BMP9 pathways and the molecular and cellular basis of the application of BMP9 in tissue engineering in current oral and maxillofacial surgery and other orthopedic-related clinical settings are also discussed.
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Donos N, Dereka X, Calciolari E. The use of bioactive factors to enhance bone regeneration: A narrative review. J Clin Periodontol 2019; 46 Suppl 21:124-161. [DOI: 10.1111/jcpe.13048] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/08/2018] [Accepted: 12/20/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Nikos Donos
- Centre for Oral Immunobiology & Regenerative Medicine & Centre for Oral Clinical Research (COCR); Institute of Dentistry, Barts & The London School of Medicine & Dentistry; Queen Mary University of London (QMUL); London UK
| | - Xanthippi Dereka
- Centre for Oral Immunobiology & Regenerative Medicine & Centre for Oral Clinical Research (COCR); Institute of Dentistry, Barts & The London School of Medicine & Dentistry; Queen Mary University of London (QMUL); London UK
- Department of Periodontology; School of Dentistry; National and Kapodistrian University of Athens; Athens Greece
| | - Elena Calciolari
- Centre for Oral Immunobiology & Regenerative Medicine & Centre for Oral Clinical Research (COCR); Institute of Dentistry, Barts & The London School of Medicine & Dentistry; Queen Mary University of London (QMUL); London UK
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Kobayashi E, Fujioka‐Kobayashi M, Saulacic N, Schaller B, Sculean A, Miron RJ. Effect of enamel matrix derivative liquid in combination with a natural bone mineral on new bone formation in a rabbit GBR model. Clin Oral Implants Res 2019; 30:542-549. [DOI: 10.1111/clr.13440] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 09/09/2018] [Accepted: 09/22/2018] [Indexed: 02/06/2023]
Affiliation(s)
- Eizaburo Kobayashi
- Department of Cranio‐Maxillofacial Surgery, Inselspital, Bern University Hospital University of Bern Bern Switzerland
- Department of Oral and Maxillofacial Surgery, School of Life, Dentistry at Niigata The Nippon Dental University Niigata Japan
| | - Masako Fujioka‐Kobayashi
- Department of Cranio‐Maxillofacial Surgery, Inselspital, Bern University Hospital University of Bern Bern Switzerland
| | - Nikola Saulacic
- Department of Cranio‐Maxillofacial Surgery, Inselspital, Bern University Hospital University of Bern Bern Switzerland
| | - Benoit Schaller
- Department of Cranio‐Maxillofacial Surgery, Inselspital, Bern University Hospital University of Bern Bern Switzerland
| | - Anton Sculean
- Department of Periodontology University of Bern Bern Switzerland
| | - Richard J. Miron
- Department of Periodontology University of Bern Bern Switzerland
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Saulacic N, Schaller B, Muñoz F, Fujioka-Kobayashi M, Kobayashi E, Lang NP, Miron RJ. Recombinant human BMP9 (RhBMP9) in comparison with rhBMP2 for ridge augmentation following tooth extraction: An experimental study in the Beagle dog. Clin Oral Implants Res 2018; 29:1050-1059. [PMID: 30281171 DOI: 10.1111/clr.13371] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 08/27/2018] [Accepted: 08/27/2018] [Indexed: 01/04/2023]
Abstract
OBJECTIVES The purpose of this study was to compare the effects of rhBMP2 with rhBMP9 on ridge augmentation following healing of extraction sockets in dogs. MATERIAL AND METHODS Five male Beagle dogs, approximately 12 months of age, were used. The mesial roots of the four maxillary premolars were endodontically treated. The distal roots were extracted, and the buccal bony walls removed. All extraction sockets were filled with deproteinized bovine bone mineral (DBBM). A collagen membrane was soaked with 4 μg or 20 μg of rhBMP9, 20 μg of rhBMP2 or sterile saline and placed over the augmented sites. All animals were euthanized after 8 weeks of healing and investigated by micro-CT and histologic analysis. A one-way ANOVA with Tukey's HSD post hoc test was used to compare the differences between the four groups. RESULTS New bone apposition in all defects was observed from the original bone. RhBMP samples showed an increase in bone formation in the buccal area and better integration of DBBM particles when compared to control sites. Both rhBMP9 defects showed higher values of bone (p = 0.024), bone marrow (p = 0.044), and total augmentation volume (p = 0.033) than the rhBMP2 (20 μg) or control sites. Highest bone area was found in rhBMP9 defects (p = 0.895). CONCLUSIONS Within the limitations of the present study, rhBMP9 sites demonstrated higher bone-inducing potential in combination with DBBM than rhBMP2. While rhBMP9s failed to demonstrate a clear dose-response relationship to the outcomes, future studies are necessary to evaluate the appropriate dose and carrier systems.
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Affiliation(s)
- Nikola Saulacic
- Department of Cranio-Maxillofacial Surgery, Faculty of Medicine, University of Berne, Berne, Switzerland
| | - Benoit Schaller
- Department of Cranio-Maxillofacial Surgery, Faculty of Medicine, University of Berne, Berne, Switzerland
| | - Fernando Muñoz
- Veterinary Faculty Lugo, University of Santiago de Compostela, Lugo, España
| | - Masako Fujioka-Kobayashi
- Department of Cranio-Maxillofacial Surgery, Faculty of Medicine, University of Berne, Berne, Switzerland
| | - Eizaburo Kobayashi
- Department of Oral and Maxillofacial Surgery, The Nippon Dental University School of Life Dentistry at Niigata, Niigata, Japan
| | - Niklaus P Lang
- Department of Cranio-Maxillofacial Surgery, Faculty of Medicine, University of Berne, Berne, Switzerland
| | - Richard J Miron
- Department of Periodontology, School of Dental Medicine, University of Berne, Berne, Switzerland
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Miron RJ, Zhang Y. Autologous liquid platelet rich fibrin: A novel drug delivery system. Acta Biomater 2018; 75:35-51. [PMID: 29772345 DOI: 10.1016/j.actbio.2018.05.021] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 04/24/2018] [Accepted: 05/14/2018] [Indexed: 02/07/2023]
Abstract
There is currently widespread interest within the biomaterial field to locally deliver biomolecules for bone and cartilage regeneration. Substantial work to date has focused on the potential role of these biomolecules during the healing process, and the carrier system utilized is a key factor in their effectiveness. Platelet rich fibrin (PRF) is a naturally derived fibrin scaffold that is easily obtained from peripheral blood following centrifugation. Slower centrifugation speeds have led to the commercialization of a liquid formulation (liquid-PRF) resulting in an upper plasma layer composed of liquid fibrinogen/thrombin prior to clot formation that remains in its liquid phase for approximately 15 min until injected into bodily tissues. Herein, we introduce the use of liquid PRF as an advanced local delivery system for small and large biomolecules. Potential target molecules including large (growth factors/cytokines and morphogenetic/angiogenic factors), as well as small (antibiotics, peptides, gene therapy and anti-osteoporotic) molecules are considered potential candidates for enhanced bone/cartilage tissue regeneration. Furthermore, liquid-PRF is introduced as a potential carrier system for various cell types and nano-sized particles that are capable of limiting/by-passing the immune system and minimizing potential foreign body reactions within host tissues following injection. STATEMENT OF SIGNIFICANCE There is currently widespread interest within the biomaterial field to locally deliver biomolecules for bone and cartilage regeneration. This review article focuses on the use of a liquid version of platelet rich fibrin (PRF) composed of liquid fibrinogen/thrombin as a drug delivery system. Herein, we introduce the use of liquid PRF as an advanced local delivery system for small and large biomolecules including growth factors, cytokines and morphogenetic/angiogenic factors, as well as antibiotics, peptides, gene therapy and anti-osteoporotic molecules as potential candidates for enhanced bone/cartilage tissue regeneration.
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