201
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Engineered systems to study the synergistic signaling between integrin-mediated mechanotransduction and growth factors (Review). Biointerphases 2018; 13:06D302. [DOI: 10.1116/1.5045231] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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202
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Bai X, Gao M, Syed S, Zhuang J, Xu X, Zhang XQ. Bioactive hydrogels for bone regeneration. Bioact Mater 2018; 3:401-417. [PMID: 30003179 PMCID: PMC6038268 DOI: 10.1016/j.bioactmat.2018.05.006] [Citation(s) in RCA: 264] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 05/09/2018] [Accepted: 05/10/2018] [Indexed: 01/11/2023] Open
Abstract
Bone self-healing is limited and generally requires external intervention to augment bone repair and regeneration. While traditional methods for repairing bone defects such as autografts, allografts, and xenografts have been widely used, they all have corresponding disadvantages, thus limiting their clinical use. Despite the development of a variety of biomaterials, including metal implants, calcium phosphate cements (CPC), hydroxyapatite, etc., the desired therapeutic effect is not fully achieved. Currently, polymeric scaffolds, particularly hydrogels, are of interest and their unique configurations and tunable physicochemical properties have been extensively studied. This review will focus on the applications of various cutting-edge bioactive hydrogels systems in bone regeneration, as well as their advantages and limitations. We will examine the composition and defects of the bone, discuss the current biomaterials for bone regeneration, and classify recently developed polymeric materials for hydrogel synthesis. We will also elaborate on the properties of desirable hydrogels as well as the fabrication techniques and different delivery strategies. Finally, the existing challenges, considerations, and the future prospective of hydrogels in bone regeneration will be outlined.
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Affiliation(s)
- Xin Bai
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P.R. China
| | - Mingzhu Gao
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P.R. China
| | - Sahla Syed
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Jerry Zhuang
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Xiaoyang Xu
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Xue-Qing Zhang
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P.R. China
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203
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Ben Amara H, Thoma DS, Schwarz F, Song HY, Capetillo J, Koo KT. Healing kinetics of oral soft tissue wounds treated with recombinant epidermal growth factor: Translation from a canine model. J Clin Periodontol 2018; 46:105-117. [DOI: 10.1111/jcpe.13035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 08/02/2018] [Accepted: 10/23/2018] [Indexed: 01/21/2023]
Affiliation(s)
- Heithem Ben Amara
- Department of Periodontology and Dental Research Institute; Translational Research Laboratory for Tissue Engineering (TTE); School of Dentistry; Seoul National University; Seoul Korea
| | - Daniel S. Thoma
- Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
| | - Frank Schwarz
- Department of Oral Surgery and Implantology; Carolinum; Goethe-University Frankfurt; Frankfurt Germany
| | - Hyun Young Song
- Department of Periodontology and Dental Research Institute; Translational Research Laboratory for Tissue Engineering (TTE); School of Dentistry; Seoul National University; Seoul Korea
| | - Joseph Capetillo
- US Army Advanced Education Program in Periodontics; Ft. Gordon GA USA
| | - Ki-Tae Koo
- Department of Periodontology and Dental Research Institute; Translational Research Laboratory for Tissue Engineering (TTE); School of Dentistry; Seoul National University; Seoul Korea
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204
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Durham EL, Howie RN, Hall S, Larson N, Oakes B, Houck R, Grey Z, Steed M, LaRue AC, Muise-Helmericks R, Cray J. Optimizing bone wound healing using BMP2 with absorbable collagen sponge and Talymed nanofiber scaffold. J Transl Med 2018; 16:321. [PMID: 30463618 PMCID: PMC6249740 DOI: 10.1186/s12967-018-1697-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 11/16/2018] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Bone is a highly vascularized and resilient organ with innate healing abilities, however some bone injuries overwhelm these attributes and require intervention, such as bone tissue engineering strategies. Combining biomaterials and growth factors, such as bone morphogenetic protein 2 (BMP2), is one of the most commonly used tissue engineering strategies. However, use of BMP2 has been correlated with negative clinical outcomes including aberrant inflammatory response, poor quality bone, and ectopic bone. METHODS In the present study, a novel poly-n-acetyl glucosamine (pGlcNAc, trade name Talymed) scaffold was utilized in addition to the commonly used acellular collagen sponge (ACS) BMP2 delivery system in a murine calvarial defect model to investigate whether the innate properties of Talymed can reduce the noted negative bone phenotypes associated with BMP2 treatment. RESULTS Comparison of murine calvarial defect healing between ACS with and without Talymed revealed that there was no measurable healing benefit for the combined treatment. Healing was most effective utilizing the traditional acellular collagen sponge with a reduced dose of BMP2. CONCLUSIONS The results of this investigation lead to the conclusion that excessive dosing of BMP2 may be responsible for the negative clinical side effects observed with this bone tissue engineering strategy. Rather than augmenting the currently used ACS BMP2 bone wound healing strategy with an additional anti-inflammatory scaffold, reducing the dose of BMP2 used in the traditional delivery system results in optimal healing without the published negative side effects of BMP2 treatment.
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Affiliation(s)
- Emily L Durham
- Department of Oral Health Sciences, Medical University of South Carolina, 173 Ashley Ave., Charleston, SC, 29425, USA
| | - R Nicole Howie
- Department of Oral Health Sciences, Medical University of South Carolina, 173 Ashley Ave., Charleston, SC, 29425, USA
| | - SarahRose Hall
- Department of Oral Health Sciences, Medical University of South Carolina, 173 Ashley Ave., Charleston, SC, 29425, USA
| | - Nicholas Larson
- Department of Oral Health Sciences, Medical University of South Carolina, 173 Ashley Ave., Charleston, SC, 29425, USA
| | - Brayden Oakes
- College of Dental Medicine, Medical University of South Carolina, 173 Ashley Ave., Charleston, SC, 29425, USA
| | - Reed Houck
- College of Dental Medicine, Medical University of South Carolina, 173 Ashley Ave., Charleston, SC, 29425, USA
| | - Zachary Grey
- Department of Oral Health Sciences, Medical University of South Carolina, 173 Ashley Ave., Charleston, SC, 29425, USA
| | - Martin Steed
- Department of Oral and Maxillofacial Surgery, Medical University of South, 173 Ashley Ave., Charleston, SC, 29425, USA
| | - Amanda C LaRue
- Department of Pathology and Laboratory Medicine, Medical University of South, 173 Ashley Ave., Charleston, SC, 29425, USA.,Ralph H. Johnson Veterans Administration Medical Center, 109 Bee St, Charleston, SC, 29401, USA
| | - Robin Muise-Helmericks
- Department of Regenerative Medicine, Medical University of South Carolina, 173 Ashley Ave., Charleston, SC, 29425, USA
| | - James Cray
- Division of Anatomy, Department of Biomedical Education & Anatomy, The Ohio State University College of Medicine, 279 Hamilton Hall, 1645 Neil Ave., Columbus, OH, 43210, USA.
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205
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Lee MS, Lee DH, Jeon J, Oh SH, Yang HS. Topographically Defined, Biodegradable Nanopatterned Patches to Regulate Cell Fate and Acceleration of Bone Regeneration. ACS APPLIED MATERIALS & INTERFACES 2018; 10:38780-38790. [PMID: 30360116 DOI: 10.1021/acsami.8b14745] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
If only allowed to proceed naturally, the bone-healing process can take several weeks, months, or even years depending on the injury size. In terms of bone-healing speed, many studies have been conducted investigating the deliverance of various growth factors of implantable biomaterials to shorten the time for bone regeneration. However, there may be side effects such as nerve pain, infection, or ectopic bone formation. As an alternative method, we focused on biophysical guidance, which provided similar topographical cues to the cellular environment to recruit host cells for bone defect healing. In this study, we hypothesized that aligned nanotopographical features have enhanced osteoblast recruitment, migration, and differentiation without external stimuli. We designed and fabricated a biodegradable poly(lactic- co-glycolic acid) nanopatterned patch using simple solvent casting and capillary force lithography. We confirmed that a biodegradable nanopatterned patch (BNP) accelerated the migration of osteoblasts according to the orientation of the patterned direction. These highly aligned osteoblasts may contribute to in vitro osteogenic differentiation, such as alkaline phosphate activity, mineralization, and calcium deposition, compared to the biodegradable flat patch (BFP). To demonstrate bone defect healing by BNP guidance in vivo, we implanted either whole or bridge BNP on the critical size defect of mouse calvarial ( ø 4 mm) or tibia bone (3 × 7 mm2). Only the BNP-treated group showed faster new bone formation and compact bone regeneration at the calvarial or tibia bone defect area compared to BFP at 4 or 8 weeks. Bridge BNP guided, in particular, the regeneration of new bone formation along the parallel direction of nanopatterned substrates. Here, we show that a BNP with biophysical guidance should be suitable for use in bone tissue regeneration through accelerated migration of the intact host cell.
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206
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Decambron A, Devriendt N, Larochette N, Manassero M, Bourguignon M, El-Hafci H, Petite H, Viateau V, Logeart-Avramoglou D. Effect of the Bone Morphogenetic Protein-2 Doses on the Osteogenic Potential of Human Multipotent Stromal Cells- Containing Tissue Engineered Constructs. Tissue Eng Part A 2018; 25:642-651. [PMID: 30311857 DOI: 10.1089/ten.tea.2018.0146] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
IMPACT STATEMENT A strategy for improving the efficacy of stem cell-based bone tissue engineering (TE) constructs is to combine bone morphogenetic protein-2 (BMP-2) with multipotent stromal cells (MSC). Previous studies on the potential cooperative effect of BMP-2 with human multipotent stromal cells (hMSCs) on bone formation in vivo have, however, shown contradictory results likely due to the various and/or inappropriate BMP-2 doses. Our results provided evidence that the addition of BMP-2 at low dose only was beneficial to improve the osteogenic potential of hMSCs-containing TE constructs, whereas BMP-2 delivered at high dose overcame the advantage of combining this growth factor with hMSCs. This new knowledge will help in designing improved combination strategies for tissue regeneration with better clinical outcomes.
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Affiliation(s)
- Adeline Decambron
- 1 B2OA UMR 7052, Univ Paris Diderot , Sorbonne Paris Cité, CNRS, Paris, France .,2 B2OA UMR 7052, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est , Maisons-Alfort, France
| | | | - Nathanael Larochette
- 1 B2OA UMR 7052, Univ Paris Diderot , Sorbonne Paris Cité, CNRS, Paris, France .,2 B2OA UMR 7052, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est , Maisons-Alfort, France
| | - Mathieu Manassero
- 1 B2OA UMR 7052, Univ Paris Diderot , Sorbonne Paris Cité, CNRS, Paris, France .,2 B2OA UMR 7052, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est , Maisons-Alfort, France
| | - Marianne Bourguignon
- 1 B2OA UMR 7052, Univ Paris Diderot , Sorbonne Paris Cité, CNRS, Paris, France .,2 B2OA UMR 7052, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est , Maisons-Alfort, France
| | - Hanane El-Hafci
- 1 B2OA UMR 7052, Univ Paris Diderot , Sorbonne Paris Cité, CNRS, Paris, France .,2 B2OA UMR 7052, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est , Maisons-Alfort, France
| | - Hervé Petite
- 1 B2OA UMR 7052, Univ Paris Diderot , Sorbonne Paris Cité, CNRS, Paris, France .,4 B2OA UMR 7052, Univ Paris Diderot, Sorbonne Paris Cité , CNRS, INSERM, Paris, France
| | - Véronique Viateau
- 1 B2OA UMR 7052, Univ Paris Diderot , Sorbonne Paris Cité, CNRS, Paris, France .,2 B2OA UMR 7052, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est , Maisons-Alfort, France
| | - Delphine Logeart-Avramoglou
- 1 B2OA UMR 7052, Univ Paris Diderot , Sorbonne Paris Cité, CNRS, Paris, France .,2 B2OA UMR 7052, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est , Maisons-Alfort, France
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207
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Fahmy-Garcia S, Mumcuoglu D, de Miguel L, Dieleman V, Witte-Bouma J, van der Eerden BCJ, van Driel M, Eglin D, Verhaar JAN, Kluijtmans SGJM, van Osch GJVM, Farrell E. Novel In Situ Gelling Hydrogels Loaded with Recombinant Collagen Peptide Microspheres as a Slow-Release System Induce Ectopic Bone Formation. Adv Healthc Mater 2018; 7:e1800507. [PMID: 30230271 DOI: 10.1002/adhm.201800507] [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: 05/09/2018] [Indexed: 01/06/2023]
Abstract
New solutions for large bone defect repair are needed. Here, in situ gelling slow release systems for bone induction are assessed. Collagen-I based Recombinant Peptide (RCP) microspheres (MSs) are produced and used as a carrier for bone morphogenetic protein 2 (BMP-2). The RCP-MSs are dispersed in three hydrogels: high mannuronate (SLM) alginate, high guluronate (SLG) alginate, and thermoresponsive hyaluronan derivative (HApN). HApN+RCP-MS forms a gel structure at 32 ºC or above, while SLM+RCP-MS and SLG+RCP-MS respond to shear stress displaying thixotropic behavior. Alginate formulations show sustained release of BMP-2, while there is minimal release from HApN. These formulations are injected subcutaneously in rats. SLM+RCP-MS and SLG+RCP-MS loaded with BMP-2 induce ectopic bone formation as revealed by X-ray tomography and histology, whereas HApN+RCP-MS do not. Vascularization occurs within all the formulations studied and is significantly higher in SLG+MS and HApN+RCP-MS than in SLM+RCP-MS. Inflammation (based on macrophage subset staining) decreases over time in both alginate groups, but increases in the HApN+RCP-MS condition. It is shown that a balance between inflammatory cell infiltration, BMP-2 release, and vascularization, achieved in the SLG+RCP-MS alginate condition, is optimal for the induction of de novo bone formation.
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Affiliation(s)
- Shorouk Fahmy-Garcia
- Department of Orthopedics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
- Department of Internal Medicine; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | - Didem Mumcuoglu
- Department of Orthopedics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
- Fujifilm Manufacturing Europe B.V.; Oudenstaart 1 5047TK Tilburg The Netherlands
| | - Laura de Miguel
- Fujifilm Manufacturing Europe B.V.; Oudenstaart 1 5047TK Tilburg The Netherlands
| | - Veerle Dieleman
- Department of Oral and Maxillofacial Surgery; Special Dental Care and Orthodontics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | - Janneke Witte-Bouma
- Department of Oral and Maxillofacial Surgery; Special Dental Care and Orthodontics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | | | - Marjolein van Driel
- Department of Internal Medicine; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | - David Eglin
- AO Research Institute Davos; Clavadelerstrasse 8 7270 Davos Switzerland
| | - Jan A. N. Verhaar
- Department of Orthopedics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | | | - Gerjo J. V. M. van Osch
- Department of Orthopedics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
- Department of Otorhinolaryngology; Head and Neck Surgery; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
| | - Eric Farrell
- Department of Oral and Maxillofacial Surgery; Special Dental Care and Orthodontics; Erasmus MC; Wytemaweg 80 3015CN Rotterdam The Netherlands
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208
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Sharmin F, O'Sullivan M, Malinowski S, Lieberman JR, Khan Y. Large scale segmental bone defect healing through the combined delivery of VEGF and BMP‐2 from biofunctionalized cortical allografts. J Biomed Mater Res B Appl Biomater 2018; 107:1002-1010. [DOI: 10.1002/jbm.b.34193] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 07/18/2017] [Accepted: 08/22/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Farzana Sharmin
- Department of Materials Science and EngineeringUniversity of Connecticut Storrs Connecticut
- Institute for Regenerative EngineeringUConn Health Farmington Connecticut
| | | | - Seth Malinowski
- Department of Biomedical EngineeringUniversity of Connecticut Storrs Connecticut
| | - Jay R. Lieberman
- Department of Orthopedic SurgeryKeck School of Medicine of the University of Southern California California Los Angeles
| | - Yusuf Khan
- Department of Materials Science and EngineeringUniversity of Connecticut Storrs Connecticut
- Institute for Regenerative EngineeringUConn Health Farmington Connecticut
- Department of Orthopaedic SurgeryUConn Health Farmington Connecticut
- Department of Biomedical EngineeringUniversity of Connecticut Storrs Connecticut
- UConn Musculoskeletal Institute Farmington Connecticut
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209
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Osteogenesis by foamed and 3D-printed nanostructured calcium phosphate scaffolds: Effect of pore architecture. Acta Biomater 2018; 79:135-147. [PMID: 30195084 DOI: 10.1016/j.actbio.2018.09.003] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/31/2018] [Accepted: 09/05/2018] [Indexed: 01/12/2023]
Abstract
There is an urgent need of synthetic bone grafts with enhanced osteogenic capacity. This can be achieved by combining biomaterials with exogenous growth factors, which however can have numerous undesired side effects, but also by tuning the intrinsic biomaterial properties. In a previous study, we showed the synergistic effect of nanostructure and pore architecture of biomimetic calcium deficient hydroxyapatite (CDHA) scaffolds in enhancing osteoinduction, i.e. fostering the differentiation of mesenchymal stem cells to bone forming cells. This was demonstrated by assessing bone formation after implanting the scaffolds intramuscularly. The present study goes one step forward, since it analyzes the effect of the geometrical features of the same CDHA scaffolds, obtained either by 3D-printing or by foaming, on the osteogenic potential and resorption behaviour in a bony environment. After 6 and 12 weeks of intraosseous implantation, both bone formation and material degradation had been drastically affected by the macropore architecture of the scaffolds. Whereas nanostructured CDHA was shown to be highly osteoconductive both in the robocast and foamed scaffolds, a superior osteogenic capacity was observed in the foamed scaffolds, which was associated with their higher intrinsic osteoinductive potential. Moreover, they showed a significantly higher cell-mediated degradation than the robocast constructs, with a simultaneous and progressive replacement of the scaffold by new bone. In conclusion, these results demonstrate that the control of macropore architecture is a crucial parameter in the design of synthetic bone grafts, which allows fostering both material degradation and new bone formation. Statement of Significance 3D-printing technologies open new perspectives for the design of patient-specific bone grafts, since they allow customizing the external shape together with the internal architecture of implants. In this respect, it is important to design the appropriate pore geometry to maximize the bone healing capacity of these implants. The present study analyses the effect of pore architecture of nanostructured hydroxyapatite scaffolds, obtained either by 3D-printing or foaming, on the osteogenic potential and scaffold resorption in an in vivo model. While nanostructured hydroxyapatite showed excellent osteoconductive properties irrespective of pore geometry, we demonstrated that the spherical, concave macropores of foamed scaffolds significantly promoted both material resorption and bone regeneration compared to the 3D-printed scaffolds with orthogonal-patterned struts and therefore prismatic, convex macropores.
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210
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Ho-Shui-Ling A, Bolander J, Rustom LE, Johnson AW, Luyten FP, Picart C. Bone regeneration strategies: Engineered scaffolds, bioactive molecules and stem cells current stage and future perspectives. Biomaterials 2018; 180:143-162. [PMID: 30036727 PMCID: PMC6710094 DOI: 10.1016/j.biomaterials.2018.07.017] [Citation(s) in RCA: 478] [Impact Index Per Article: 79.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 07/06/2018] [Accepted: 07/10/2018] [Indexed: 12/25/2022]
Abstract
Bone fractures are the most common traumatic injuries in humans. The repair of bone fractures is a regenerative process that recapitulates many of the biological events of embryonic skeletal development. Most of the time it leads to successful healing and the recovery of the damaged bone. Unfortunately, about 5-10% of fractures will lead to delayed healing or non-union, more so in the case of co-morbidities such as diabetes. In this article, we review the different strategies to heal bone defects using synthetic bone graft substitutes, biologically active substances and stem cells. The majority of currently available reviews focus on strategies that are still at the early stages of development and use mostly in vitro experiments with cell lines or stem cells. Here, we focus on what is already implemented in the clinics, what is currently in clinical trials, and what has been tested in animal models. Treatment approaches can be classified in three major categories: i) synthetic bone graft substitutes (BGS) whose architecture and surface can be optimized; ii) BGS combined with bioactive molecules such as growth factors, peptides or small molecules targeting bone precursor cells, bone formation and metabolism; iii) cell-based strategies with progenitor cells combined or not with active molecules that can be injected or seeded on BGS for improved delivery. We review the major types of adult stromal cells (bone marrow, adipose and periosteum derived) that have been used and compare their properties. Finally, we discuss the remaining challenges that need to be addressed to significantly improve the healing of bone defects.
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Affiliation(s)
- Antalya Ho-Shui-Ling
- Grenoble Institute of Technology, Univ. Grenoble Alpes, 38000 Grenoble, France; CNRS, LMGP, 3 Parvis Louis Néel, 38031 Grenoble Cedex 01, France
| | - Johanna Bolander
- Tissue Engineering Laboratory, Skeletal Biology and Engineering Research Center, KU Leuven, Belgium; Prometheus, Division of Skeletal Tissue Engineering, KU Leuven, Belgium
| | - Laurence E Rustom
- Department of Bioengineering, University of Illinois at Urbana-Champaign, 1304 West Springfield Avenue, Urbana, IL 61801, USA
| | - Amy Wagoner Johnson
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 1206 West Green Street, Urbana, IL 61081, USA; Carle Illinois College of Medicine, University of Illinois at Urbana-Champaign, USA; Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 West Gregory Drive, Urbana, IL 61801, USA
| | - Frank P Luyten
- Tissue Engineering Laboratory, Skeletal Biology and Engineering Research Center, KU Leuven, Belgium; Prometheus, Division of Skeletal Tissue Engineering, KU Leuven, Belgium.
| | - Catherine Picart
- Grenoble Institute of Technology, Univ. Grenoble Alpes, 38000 Grenoble, France; CNRS, LMGP, 3 Parvis Louis Néel, 38031 Grenoble Cedex 01, France.
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211
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Crispim JF, Fu SC, Lee YW, Fernandes HAM, Jonkheijm P, Yung PSH, Saris DBF. Bioactive Tape With BMP-2 Binding Peptides Captures Endogenous Growth Factors and Accelerates Healing After Anterior Cruciate Ligament Reconstruction. Am J Sports Med 2018; 46:2905-2914. [PMID: 30074814 DOI: 10.1177/0363546518787507] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The anterior cruciate ligament (ACL) has poor regenerative capacity, and an injury leads to loss of function, limiting quality of life and increasing the incidence of osteoarthritis. Surgical interventions can stabilize the joint and improve functional recovery. The delivery of growth factors (GFs) enhances the healing process; however, this is complex in its regulation, is high in costs, has side effects, and can only be accomplished with supraphysiological concentrations and thus is currently not clinically feasible. However, the immobilization of a patient's endogenous GFs in biomaterials can overcome these problems. PURPOSE To develop a method to capture endogenous bone morphogenetic protein-2 (BMP-2) and ultimately show enhanced ACL healing in vivo using this novel methodology. STUDY DESIGN Controlled laboratory study. METHODS BMP-2 binding peptides were synthetized, purified, and immobilized on polycaprolactone (PCL) films. The affinity between the peptide and human BMP-2 (hBMP-2) was confirmed with immunofluorescence and enzyme-linked immunosorbent assay. The C2C12 Luc reporter cell line was used to confirm the bioactivity of immobilized BMP-2. For in vivo experiments, the same functionalization technology was applied to the commercially available Polytape, and the functionalized tape was sutured together with the graft used for ACL reconstruction in rats. Each animal underwent reconstruction with either native Polytape (n = 3) or Polytape with BMP-2 binding peptides (n = 3). At 2 and 6 weeks after surgery, the graft was assessed by histology and micro-computed tomography. RESULTS The covalent immobilization of the peptide in PCL was successful, allowing the peptide to capture hBMP-2, which remained bioactive and led to the osteogenic differentiation of C2C12. In vivo experiments confirmed the potential of the Polytape functionalized with the BMP-2 binding peptide to capture endogenous BMP-2, leading to enhanced bone formation inside the femoral and tibial tunnels and ultimately improving the graft's quality. CONCLUSION The incorporation of BMP-2 binding peptides into materials used for ACL reconstruction can capture endogenous hBMP-2, which enhances the healing process inside the bone tunnels. CLINICAL RELEVANCE These results demonstrate the potential of using synthetic peptides to endow biomaterials with novel biological functions, namely to capture and immobilize endogenous GFs.
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Affiliation(s)
- João F Crispim
- Department of Developmental Bioengineering, TechMed Centre, University of Twente, Enschede, the Netherlands.,Bioinspired Molecular Engineering Laboratory, TechMed Centre, University of Twente, Enschede, the Netherlands
| | - Sai C Fu
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.,Lui Che Woo Institute of Innovative Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Yuk W Lee
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.,Lui Che Woo Institute of Innovative Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | | | - Pascal Jonkheijm
- Bioinspired Molecular Engineering Laboratory, TechMed Centre, University of Twente, Enschede, the Netherlands.,Molecular Nanofabrication Group, MESA+ Institute for Nanotechnology, University of Twente, Enschede, the Netherlands
| | - Patrick S H Yung
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.,Lui Che Woo Institute of Innovative Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Daniël B F Saris
- Department of Developmental Bioengineering, TechMed Centre, University of Twente, Enschede, the Netherlands.,Department of Orthopaedics, University Medical Center Utrecht, Utrecht, the Netherlands
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212
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Carlisle P, Guda T, Silliman DT, Burdette AJ, Talley AD, Alvarez R, Tucker D, Hale RG, Guelcher SA, BrownBaer PR. Localized low-dose rhBMP-2 is effective at promoting bone regeneration in mandibular segmental defects. J Biomed Mater Res B Appl Biomater 2018; 107:1491-1503. [PMID: 30265782 DOI: 10.1002/jbm.b.34241] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Revised: 08/11/2018] [Accepted: 08/18/2018] [Indexed: 12/29/2022]
Abstract
At least 26% of recent battlefield injuries are to the craniomaxillofacial (CMF) region. Recombinant human bone morphogenetic protein 2 (rhBMP-2) is used to treat CMF open fractures, but several complications have been associated with its use. This study tested the efficacy and safety of a lower (30% recommended) dose of rhBMP-2 to treat mandibular fractures. rhBMP-2 delivered via a polyurethane (PUR) and hydroxyapatite/β-tricalcium phosphate (Mastergraft®) scaffold was evaluated in a 2 cm segmental mandibular defect in minipigs. Bone regeneration was analyzed at 4, 8, and 12 weeks postsurgery using clinical computed tomography (CT) and rhBMP-2, and inflammatory marker concentrations were analyzed in serum and surgery-site drain effluent. CT scans revealed that pigs treated with PUR-Mastergraft® + rhBMP-2 had complete bone bridging, while the negative control group showed incomplete bone-bridging (n = 6). Volumetric analysis of regenerated bone showed that the PUR-Mastergraft® + rhBMP-2 treatment generated significantly more bone than control by 4 weeks, a trend that continued through 12 weeks. Variations in inflammatory analytes were detected in drain effluent samples and saliva but not in serum, suggesting a localized healing response. Importantly, the rhBMP-2 group did not exhibit an excessive increase in inflammatory analytes compared to control. Treatment with low-dose rhBMP-2 increases bone regeneration capacity in pigs with mandibular continuity defects and restores bone quality. Negative complications from rhBMP-2, such as excessive inflammatory analyte levels, were not observed. Together, these results suggest that treatment with low-dose rhBMP-2 is efficacious and may improve safety when treating CMF open fractures. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 1491-1503, 2019.
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Affiliation(s)
- Patricia Carlisle
- Department of Craniomaxillofacial Regenerative Medicine, Dental and Trauma Research Detachment, Fort Sam Houston, Texas, 78234
| | - Teja Guda
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, Texas, 78249
| | - David T Silliman
- Department of Craniomaxillofacial Regenerative Medicine, Dental and Trauma Research Detachment, Fort Sam Houston, Texas, 78234
| | - Alexander J Burdette
- United States Naval Medical Research Unit-San Antonio, Fort Sam Houston, Texas, 78234
| | - Anne D Talley
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235
| | - Rene Alvarez
- United States Naval Medical Research Unit-San Antonio, Fort Sam Houston, Texas, 78234
| | - David Tucker
- Department of Craniomaxillofacial Regenerative Medicine, Dental and Trauma Research Detachment, Fort Sam Houston, Texas, 78234
| | - Robert G Hale
- Department of Craniomaxillofacial Regenerative Medicine, Dental and Trauma Research Detachment, Fort Sam Houston, Texas, 78234
| | - Scott A Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN, 37235
| | - Pamela R BrownBaer
- Department of Craniomaxillofacial Regenerative Medicine, Dental and Trauma Research Detachment, Fort Sam Houston, Texas, 78234
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Zielak JC, Neto DG, Cazella Zielak MA, Savaris LB, Esteban Florez FL, Deliberador TM. In vivo regeneration functionalities of experimental organo-biomaterials containing water-soluble nacre extract. Heliyon 2018; 4:e00776. [PMID: 30229137 PMCID: PMC6141258 DOI: 10.1016/j.heliyon.2018.e00776] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 02/08/2018] [Accepted: 09/05/2018] [Indexed: 12/01/2022] Open
Abstract
Background Novel multifunctional biomaterials were recently designed to allow for an optimized tissue regeneration process. Purpose To comprehensively assess (photographic, radiographic and histological) the in vivo functionality of demineralized bovine bone matrix (DBM) associated with an experimental marine organic extract (MOE) from nacre in a sheep ectopic grafting model. Materials and methods Synthesis of MOE was based on mixing powdered nacre (0.05 g, particles average size <0.1 mm) with acetic acid (5 mL, pH 7) under constant stirring for 72 hours (25 °C). Polyethylene tubes (3/animal, n = 4, diameter: 5.0 mm × length: 10.0 mm) from the control (empty) or experimental groups (DBM or DBM + MOE) were then intramuscularly implanted into the lumbar regions of sheep (n = 8, 2-years old, ≈45 kg). Animals were euthanized at 3 and 6 months to allow for the collection of tissue samples. Tissue samples were fixed in formalin 10% (buffered, 7 days) in preparation for photographic, radiographic and histological assessments. Acquired images were then analyzed using digital image analysis software to quantify the amount of neoformed tissues, whereas radiographic and histological analyses were performed to determine radiopacity and classification of tissues deposited inside of the tubes. Results Photographic and radiographic analyses have shown that both pure (unaltered) and MOE-modified DBM were capable of depositing neoformed tissues (at 3 and 6 months), where higher levels of deposition and radiopacity were observed on groups treated with experimental materials. Histological results, however, demonstrated that tissues formed from both unaltered and MOE-modified DBM were only fibrous connective in origin. Conclusions As an ectopic grafting in sheep, the experimental organo-biomaterial association applied did not reveal any osteoinductive property but led to a fibrous tissue repair only.
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Affiliation(s)
- João César Zielak
- Graduate Program in Dentistry, Universidade Positivo, Rua Professor Pedro Viriato Parigot de Souza, 5300, Curitiba, Paraná, 81280-330, Brazil
| | - David Gulin Neto
- Graduate Program in Dentistry, Universidade Positivo, Rua Professor Pedro Viriato Parigot de Souza, 5300, Curitiba, Paraná, 81280-330, Brazil
| | - Makeli Aparecida Cazella Zielak
- Graduate Program in Dentistry, Universidade Positivo, Rua Professor Pedro Viriato Parigot de Souza, 5300, Curitiba, Paraná, 81280-330, Brazil
| | - Leonardo Brunet Savaris
- Graduate Program in Dentistry, Universidade Positivo, Rua Professor Pedro Viriato Parigot de Souza, 5300, Curitiba, Paraná, 81280-330, Brazil
| | - Fernando Luis Esteban Florez
- Department of Restorative Sciences, Division of Dental Biomaterials, The University of Oklahoma Health Sciences Center, 1201 N. Stonewall Ave., Oklahoma City, OK, 73117, USA
| | - Tatiana Miranda Deliberador
- Graduate Program in Dentistry, Universidade Positivo, Rua Professor Pedro Viriato Parigot de Souza, 5300, Curitiba, Paraná, 81280-330, Brazil
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Gharat TP, Diaz-Rodriguez P, Erndt-Marino JD, Jimenez Vergara AC, Munoz Pinto DJ, Bearden RN, Huggins SS, Grunlan M, Saunders WB, Hahn MS. A canine in vitro model for evaluation of marrow-derived mesenchymal stromal cell-based bone scaffolds. J Biomed Mater Res A 2018; 106:2382-2393. [PMID: 29633508 PMCID: PMC6158043 DOI: 10.1002/jbm.a.36430] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 02/18/2018] [Accepted: 03/28/2018] [Indexed: 12/23/2022]
Abstract
Tissue engineered bone grafts based on bone marrow mesenchymal stromal cells (MSCs) are being actively developed for craniomaxillofacial (CMF) applications. As for all tissue engineered implants, the bone-regenerating capacity of these MSC-based grafts must first be evaluated in animal models prior to human trials. Canine models have traditionally resulted in improved clinical translation of CMF grafts relative to other animal models. However, the utility of canine CMF models for evaluating MSC-based bone grafts rests on canine MSCs (cMSCs) responding in a similar manner to scaffold-based stimuli as human MSCs (hMSCs). Herein, cMSC and hMSC responses to polyethylene glycol (PEG)-based scaffolds were therefore compared in the presence or absence of osteoinductive polydimethylsiloxane (PDMS). Notably, the conjugation of PDMS to PEG-based constructs resulted in increases in both cMSC and hMSC osteopontin and calcium deposition. Based on these results, cMSCs were further used to assess the efficacy of tethered bone morphogenic protein 2 (BMP2) in enhancing PEG-PDMS scaffold osteoinductivity. Addition of low doses of tethered BMP2 (100 ng/mL) to PEG-PDMS systems increased cMSC expression of osterix and osteopontin compared to both PEG-PDMS and PEG-BMP2 controls. Furthermore, these increases were comparable to effects seen with up to five-times higher BMP2 doses noted in literature. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A:2382-2393, 2018.
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Affiliation(s)
- Tanmay P. Gharat
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
| | | | - Josh D. Erndt-Marino
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
| | | | - Dany J. Munoz Pinto
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Robert N. Bearden
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Shannon S. Huggins
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Melissa Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas, USA
| | - W. Brian Saunders
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Mariah S. Hahn
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
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Howie RN, Durham E, Oakes B, Grey Z, Smith J, Campbell P, LaRue A, Steed M, Muise-Helmericks R, Cray J. Testing a novel nanofibre scaffold for utility in bone tissue regeneration. J Tissue Eng Regen Med 2018; 12:2055-2066. [PMID: 30058251 DOI: 10.1002/term.2740] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 07/11/2018] [Accepted: 07/12/2018] [Indexed: 12/20/2022]
Abstract
Many variables serve to alter the process of bone remodelling and diminish regeneration including the size and nature of the wound bed and health status of the individual. To overcome these inhibitory factors, tissue-engineered osteoconductive scaffolds paired with various growth factors have been utilized clinically. However, many limitations still remain, for example, bone morphogenetic protein 2 (BMP2) can lead to rampant inflammation, ectopic bone formation, and graft failure. Here, we studied the ability for a nanofiber scaffold (Talymed) to accelerate BMP2 growth factor-induced bone healing compared with the traditional absorbable collagen sponge (ACS) delivery system. One hundred fifty-five adult wild type mice were arranged in 16 groups by time, 4 and 8 weeks, and treatment, ACS or Talymed, loaded with control, low, medium, or high dosages of BMP2. Skulls were subjected to microCT, biomechanical, and histological analysis to assess bone regeneration. The use of Talymed within the defect site was found to decrease the bone volume, bone formation rate, and alkaline phosphatase activity compared with ACS/BMP2 combinations. Interestingly, though Talymed regenerated less bone, the regenerate was found to have a greater hardness value than that of bone within the ACS groups. However, the difference in bone hardness between scaffolds was not detectable by 8 weeks. Based on these results, we found that the nanofiber scaffold generated a better quality of bone regenerate at 4 weeks but, due to the lack of overall bone formation and the inhibition of normal remodelling processes, was not as efficacious as the current clinical standard ACS/BMP2 therapy.
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Affiliation(s)
- R Nicole Howie
- Department of Oral Health Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Emily Durham
- Department of Oral Health Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Brayden Oakes
- College of Dental Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Zachary Grey
- Department of Oral Health Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Jason Smith
- Engineering Reseacher Accelerated and Integrated Innovation Institute, Carnegie Mellon University, Pittsburgh, Pennsylvania
| | - Phil Campbell
- Institute for Complex Engineering Systems, Carnegie Mellon University, Pittsburgh, Pennsylvania
| | - Amanda LaRue
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, and Ralph H. Johnston Department of Veterans Affairs, Charleston, South Carolina
| | - Martin Steed
- Department of Oral and Maxillofacial Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Robin Muise-Helmericks
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, South Carolina
| | - James Cray
- Division of Anatomy, College of Medicine, The Ohio State University, Columbus, Ohio
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216
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Controlled Non-Viral Gene Delivery in Cartilage and Bone Repair: Current Strategies and Future Directions. ADVANCED THERAPEUTICS 2018. [DOI: 10.1002/adtp.201800038] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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217
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Bi W, Liu Y, Guo J, Lin Z, Liu J, Zhou M, Wismeijer D, Pathak JL, Wu G. All-trans retinoic-acid inhibits heterodimeric bone morphogenetic protein 2/7-stimulated osteoclastogenesis, and resorption activity. Cell Biosci 2018; 8:48. [PMID: 30159139 PMCID: PMC6107948 DOI: 10.1186/s13578-018-0246-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 08/20/2018] [Indexed: 11/10/2022] Open
Abstract
Background Bone regenerative heterodimeric bone morphogenetic protein 2/7 (BMP2/7) enhances but all-trans retinoic acid (ATRA) inhibits osteoclastogenesis. However, the effect of ATRA on physiological and/or BMP2/7-induced osteoclastogenesis in still unclear. In this study, we aimed to test the effect of combined treatment of BMP2/7 and ATRA on osteoclastogenesis, and resorption activity. Results All-trans retinoic acid (1 µM) ± BMP2/7 (5 or 50 ng/ml) was added in murine pre-osteoclasts cell line RAW264.7 or mouse bone marrow derived macrophages (BMM) cultures. Osteoclast marker gene expression, osteoclastogenesis, and resorption activity were analyzed. BMP2/7 robustly enhanced osteoclast maker gene expression, osteoclastogenesis, and resorption activity. Interestingly, ATRA completely inhibited osteoclast formation in presence or absence of BMP2/7. Pan-antagonist of retinoic acid receptors (RARs) and antagonist of RARα, β or γ failed to reverse the inhibitory effect of ATRA on osteoclastogenesis. ATRA strongly inhibited Rank and Nfatc1 expression. Conclusions All-trans retinoic acid inhibits BMP2/7-induced osteoclastogenesis, and resorption activity possibly via RANKL-RANK pathway. Our findings from previous and current study suggest that combination of ATRA and BMP2/7 could be a novel approach to treat hyperactive osteoclast-induced bone loss such as in inflammation-induced severe osteoporosis and bone loss caused by cancer metastasis to bone.
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Affiliation(s)
- Wenjuan Bi
- 1School of Stomatology, North China University of Science and Technology, Tangshan, China
| | - Yi Liu
- 2Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, China.,3Department of Oral Implantology and Prosthetic Dentistry, Academic Centre of Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Jing Guo
- 2Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhen Lin
- 4Department of Orthopedics, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Jinsong Liu
- 5School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou, China
| | - Miao Zhou
- 2Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Daniel Wismeijer
- 3Department of Oral Implantology and Prosthetic Dentistry, Academic Centre of Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Janak L Pathak
- 2Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Gang Wu
- 3Department of Oral Implantology and Prosthetic Dentistry, Academic Centre of Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
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218
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Sun S, Zhang Y, Zeng D, Zhang S, Zhang F, Yu W. PLGA film/Titanium nanotubues as a sustained growth factor releasing system for dental implants. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:141. [PMID: 30120576 DOI: 10.1007/s10856-018-6138-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2018] [Accepted: 07/26/2018] [Indexed: 06/08/2023]
Abstract
Ti-based implants sometimes fail to integrate with surrounding bone tissue due to insufficiency of new bone formation and surface bonding. To overcome this problem, this research focused on establishing a sustained bone growth factor delivery system by applying anodized TiO2 nanotube arrays and PLGA film on the titanium implant surface. TiO2 nanotube arrays were made by anodic oxidation method, and were then filled with rhBMP2 by vacuum freeze-drying. Next, PLGA was deposition on the surface of this material. The designed system was characterized, pharmacokinetic release rate of rhBMP2 was determined. Adhesion, proliferation, and differentiation activity of osteoblasts cultured on the new surfaces and traditional titanium surfaced were compared. SEM showed that a surface of TiO2 nanotube arrays were successfully generated. PLGA membranes of 50 nm, 250 nm, 800 nm thickness were successfully deposited on the surfaces of TiO2 nanotube layers by using 1%, 3%, 10% PLGA solutions. PLGA film of 250 nm thickness showed ideally controlled release of rhBMP2, lasting for 4 weeks. Furthermore, 250 nm thickness PLGA film improved osteoblast adhesion, proliferation, and levels of alkaline phosphatase. In conclusion, the PLGA film / TiO2 nanotube growth factor delivery system can effectively sustain the release of rhBMP-2, and promote proliferation and differentiation of MC3T3-E1 osteoblasts.
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Affiliation(s)
- Shengjun Sun
- Shandong Provincial Key Laboratory of Oral Biomedicine, College of Stomatology, Shandong University, No. 44-1, Wenhuaxilu Rd, Jinan, Shandong, 250012, People's Republic of China
- Department of Prosthodontics, Ninth People's Hospital, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639, zhizaoju Rd, Shanghai, 250011, People's Republic of China
| | - Yilin Zhang
- Department of Prosthodontics, Ninth People's Hospital, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639, zhizaoju Rd, Shanghai, 250011, People's Republic of China
- Department of Stomatology, Shandong Provincial Hospital affiliated to Shandong University, Yanshanxi Rd, Jinan, Shandong, 250001, People's Republic of China
| | - Deliang Zeng
- Department of Prosthodontics, Ninth People's Hospital, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639, zhizaoju Rd, Shanghai, 250011, People's Republic of China
| | - Songmei Zhang
- Department of Prosthodontics, Ninth People's Hospital, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639, zhizaoju Rd, Shanghai, 250011, People's Republic of China
- Eastman Institute for Oral Health, University of Rochester, 625 Elmwood Avenue, Rochester, New York, 14620, USA
| | - Fuqiang Zhang
- Department of Prosthodontics, Ninth People's Hospital, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639, zhizaoju Rd, Shanghai, 250011, People's Republic of China.
| | - Weiqiang Yu
- Department of Prosthodontics, Ninth People's Hospital, Shanghai Key Laboratory of Stomatology, Shanghai Jiao Tong University School of Medicine, No. 639, zhizaoju Rd, Shanghai, 250011, People's Republic of China.
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Escherichia coli-derived BMP-2-absorbed β-TCP granules induce bone regeneration in rabbit critical-sized femoral segmental defects. INTERNATIONAL ORTHOPAEDICS 2018; 43:1247-1253. [PMID: 30097727 DOI: 10.1007/s00264-018-4079-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 07/31/2018] [Indexed: 10/28/2022]
Abstract
PURPOSE This study investigated whether Escherichia coli-derived bone morphogenetic protein (BMP)-2 (E-BMP-2) adsorbed onto β-tricalcium phosphate (β-TCP) granules can induce bone regeneration in critical-size femoral segmental defects in rabbits. METHODS Bone defects 20 mm in size and stabilized with an external fixator were created in the femur of New Zealand white rabbits, which were divided into BMP-2 and control groups. E-BMP-2-loaded β-TCP granules were implanted into defects of the BMP-2 group, whereas defects in the controls were implanted with β-TCP granules alone. At 12 and 24 weeks after surgery, radiographs were obtained of the femurs and histological and biomechanical assessments of the defect area were performed. Bone regeneration was quantified using micro-computed tomography at 24 weeks. RESULTS Radiographic and histologic analyses revealed bone regeneration in the BMP-2 group but not the control group; no fracturing of newly formed bone occurred when the external fixator was removed at 12 weeks. At 24 weeks, tissue mineral density, the ratio of bone volume to total volume, and volumetric bone mineral density of the callus were higher in the BMP-2 group than in control animals. In the former, ultimate stress, extrinsic stiffness, and failure energy measurements for the femurs were higher at 24 weeks than at 12 weeks. CONCLUSION E-BMP-2-loaded β-TCP granules can effectively promote bone regeneration in long bone defects.
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220
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Controlled-release nanotherapeutics: State of translation. J Control Release 2018; 284:39-48. [DOI: 10.1016/j.jconrel.2018.06.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 06/04/2018] [Accepted: 06/10/2018] [Indexed: 12/14/2022]
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221
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Zhang X, Chen S, Liu Y, Zhang P, Ge Y, Guo J, Wu G, Zhou Y. Heterodimeric BMP-2/7 exhibits different osteoinductive effects in human and murine cells. Growth Factors 2018; 36:141-152. [PMID: 30238816 DOI: 10.1080/08977194.2018.1477139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
As robust osteoinductive cytokines, bone morphogenetic proteins (BMPs) play a significant role in bone tissue engineering. Constituted of two different polypeptides, heterodimeric BMPs are more effective than the homodimers in bone formation. While most studies focused on the murine cell lines, such as murine preosteoblasts MC3T3-E1, the role of heterodimeric BMPs in the osteogenic differentiation of human cells remains uncertain, which hinders their application to practical treatment. In this study, we compared the osteoinductive effects of BMP-2/7 heterodimer in human adipose-derived stem cells (hASCs) with their homodimers BMP-2 and BMP-7, in which MC3T3-E1 cells were utilized as a positive control. The results indicated that BMP-2/7 was not a stronger inducer during the osteogenic differentiation of hASCs as that for MC3T3-E1, and extracellular-signal-regulated kinase signaling played a role in the different effects of BMP-2/7 between hASCs and MC3T3-E1. Our study demonstrates the osteoinductive effects of heterodimeric BMP-2/7 present in a cell-specific pattern and cautions should be taken when applying heterodimeric BMP-2/7 to clinical practice.
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Affiliation(s)
- Xiao Zhang
- a Department of Prosthodontics , Peking University School and Hospital of Stomatology , Beijing , China
- b National Engineering Lab for Digital and Material Technology of Stomatology , Beijing , China
- c National Clinical Research Center for Oral Diseases , Beijing , China
- d Beijing Key Laboratory for Digital Stomatology , Beijing , China
| | - Si Chen
- a Department of Prosthodontics , Peking University School and Hospital of Stomatology , Beijing , China
- b National Engineering Lab for Digital and Material Technology of Stomatology , Beijing , China
- c National Clinical Research Center for Oral Diseases , Beijing , China
- d Beijing Key Laboratory for Digital Stomatology , Beijing , China
| | - Yunsong Liu
- a Department of Prosthodontics , Peking University School and Hospital of Stomatology , Beijing , China
- b National Engineering Lab for Digital and Material Technology of Stomatology , Beijing , China
- c National Clinical Research Center for Oral Diseases , Beijing , China
- d Beijing Key Laboratory for Digital Stomatology , Beijing , China
| | - Ping Zhang
- a Department of Prosthodontics , Peking University School and Hospital of Stomatology , Beijing , China
- b National Engineering Lab for Digital and Material Technology of Stomatology , Beijing , China
- c National Clinical Research Center for Oral Diseases , Beijing , China
- d Beijing Key Laboratory for Digital Stomatology , Beijing , China
| | - Yanjun Ge
- a Department of Prosthodontics , Peking University School and Hospital of Stomatology , Beijing , China
- b National Engineering Lab for Digital and Material Technology of Stomatology , Beijing , China
- c National Clinical Research Center for Oral Diseases , Beijing , China
- d Beijing Key Laboratory for Digital Stomatology , Beijing , China
| | - Jing Guo
- e Department of Oral Cell Biology , Academic Centre for Dentistry Amsterdam (ACTA), Research Institute MOVE, VU University and University of Amsterdam , LA Amsterdam , The Netherland
| | - Gang Wu
- f Department of Oral Implantology and Prosthetic Dentistry , Academic Centre for Dentistry Amsterdam (ACTA), Research Institute MOVE, VU University and University of Amsterdam , LA Amsterdam , The Netherland
| | - Yongsheng Zhou
- a Department of Prosthodontics , Peking University School and Hospital of Stomatology , Beijing , China
- b National Engineering Lab for Digital and Material Technology of Stomatology , Beijing , China
- c National Clinical Research Center for Oral Diseases , Beijing , China
- d Beijing Key Laboratory for Digital Stomatology , Beijing , China
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Cai B, Zou Q, Zuo Y, Mei Q, Ma J, Lin L, Chen L, Li Y. Injectable Gel Constructs with Regenerative and Anti-Infective Dual Effects Based on Assembled Chitosan Microspheres. ACS APPLIED MATERIALS & INTERFACES 2018; 10:25099-25112. [PMID: 29952200 DOI: 10.1021/acsami.8b06648] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
There is increasing demand for biomaterials that both assist with bone regeneration and have anti-infection qualities in clinical applications. To achieve this goal, chitosan microspheres with either positive or negative charges were fabricated and then assembled as a gel for bone healing. The positively charged chitosan microspheres (CSM; ∼35.5 μm) and negatively charged O-carboxymethyl chitosan microspheres (CMCSM; ∼13.5 μm) were loaded, respectively, with bone morphogenetic protein (BMP-2) and berberine (Bbr) via swollen encapsulation and physical adsorption without a significant change in the electric charges. The release kinetics of BMP-2 and Bbr from the microspheres were also studied in vitro. The results showed that the Bbr/CMCSM microsphere group possessed high antibacterial activity against Staphylococcus aureus; the BMP-2/CSM microsphere group also had excellent cytocompatibility and improved osteoinductivity with the assistance of BMP-2. The assembled gel group consisting of Bbr/CMCSM and BMP-2/CSM had a porous structure that allowed biological signal transfer and tissue infiltration and exhibited significantly enhanced bone reconstruction compared with that of the respective microsphere groups, which should result from the osteoconductivity of the porous structure and the osteoinduction of the BMP-2 growth factor. The oppositely charged microspheres and their assembled gel provide a promising prospect for making injectable tissue-engineered constructs with regenerative and anti-infective dual effects for biomedical applications.
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Affiliation(s)
- Bin Cai
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Qin Zou
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Yi Zuo
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Quanjing Mei
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Jinqi Ma
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Lili Lin
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Li Chen
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Yubao Li
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
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223
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Yan S, Feng L, Zhu Q, Yang W, Lan Y, Li D, Liu Y, Xue W, Guo R, Wu G. Controlled Release of BMP-2 from a Heparin-Conjugated Strontium-Substituted Nanohydroxyapatite/Silk Fibroin Scaffold for Bone Regeneration. ACS Biomater Sci Eng 2018; 4:3291-3303. [DOI: 10.1021/acsbiomaterials.8b00459] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shina Yan
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Longbao Feng
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Qiyu Zhu
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Wei Yang
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Yong Lan
- Beogene Biotech (Guangzhou) Co., Ltd., Guangzhou 510663, China
| | - Dan Li
- Beogene Biotech (Guangzhou) Co., Ltd., Guangzhou 510663, China
| | - Yu Liu
- Guangzhou Chuangseed Biomedical Materials Co., Ltd., Guangzhou 510663, China
| | - Wei Xue
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Rui Guo
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Department of Biomedical Engineering, Jinan University, Guangzhou 510632, China
| | - Gang Wu
- Department of Oral Implantology and Prosthetic Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije University Amsterdam, Gustav mahlerlaan 3004, 1081 LA Amsterdam, the Netherlands
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224
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Aragón J, Salerno S, De Bartolo L, Irusta S, Mendoza G. Polymeric electrospun scaffolds for bone morphogenetic protein 2 delivery in bone tissue engineering. J Colloid Interface Sci 2018; 531:126-137. [PMID: 30029031 DOI: 10.1016/j.jcis.2018.07.029] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 07/08/2018] [Accepted: 07/09/2018] [Indexed: 01/05/2023]
Abstract
HYPOTHESIS The development of novel scaffolds based on biocompatible polymers is of great interest in the field of bone repair for fabrication of biodegradable scaffolds that mimic the extracellular matrix and have osteoconductive and osteoinductive properties for enhanced bone regeneration. EXPERIMENTS Polycaprolactone (PCL) and polycaprolactone/polyvinyl acetate (PCL/PVAc) core-shell fibers were synthesised and decorated with poly(lactic-co-glycolic acid) [PLGA] particles loaded with bone morphogenetic protein 2 (BMP2) by simultaneous electrospinning and electrospraying. Hydroxyapatite nanorods (HAn) were loaded into the core of fibers. The obtained scaffolds were characterised by scanning and transmission electron microscopy, Fourier-transform infrared spectroscopy, and thermogravimetric analysis. The in vitro potential of these materials for bone regeneration was assessed in biodegradation assays, osteoblast viability assays, and analyses of expression of specific bone markers, such as alkaline phosphatase (ALP), osteocalcin (OCN), and osteopontin (OPN). FINDINGS PLGA particles were homogeneously distributed in the entire fibre mat. The growth factor load was 1.2-1.7 μg/g of the scaffold whereas the HAn load was in the 8.8-12.6 wt% range. These scaffolds were able to support and enhance cell growth and proliferation facilitating the expression of osteogenic and osteoconductive markers (OCN and OPN). These observations underline the great importance of the presence of BMP2 in scaffolds for bone remodelling as well as the good potential of the newly developed scaffolds for clinical use in tissue engineering.
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Affiliation(s)
- Javier Aragón
- Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Campus Rio Ebro-Edificio I+D, C/Mariano Esquillor S/N, 50018 Zaragoza, Spain; Aragon Health Research Institute (IIS Aragon), 50009 Zaragoza, Spain.
| | - Simona Salerno
- Institute for Membrane Technology, National Research Council of Italy, ITM-CNR c/o University of Calabria, Via P. Bucci cubo 17/C, I-87036 Rende, Italy.
| | - Loredana De Bartolo
- Institute for Membrane Technology, National Research Council of Italy, ITM-CNR c/o University of Calabria, Via P. Bucci cubo 17/C, I-87036 Rende, Italy.
| | - Silvia Irusta
- Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Campus Rio Ebro-Edificio I+D, C/Mariano Esquillor S/N, 50018 Zaragoza, Spain; Aragon Health Research Institute (IIS Aragon), 50009 Zaragoza, Spain; Networking Research Center for Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain.
| | - Gracia Mendoza
- Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Campus Rio Ebro-Edificio I+D, C/Mariano Esquillor S/N, 50018 Zaragoza, Spain; Aragon Health Research Institute (IIS Aragon), 50009 Zaragoza, Spain.
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225
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Cheng A, Krishnan L, Tran L, Stevens HY, Xia B, Lee N, Williams JK, Gibson G, Guldberg RE. The Effects of Age and Dose on Gene Expression and Segmental Bone Defect Repair After BMP-2 Delivery. JBMR Plus 2018; 3:e10068. [PMID: 30828685 PMCID: PMC6383700 DOI: 10.1002/jbm4.10068] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 05/31/2018] [Accepted: 06/12/2018] [Indexed: 11/25/2022] Open
Abstract
Age is a well‐known influential factor in bone healing, with younger patients generally healing bone fractures more rapidly and suffering fewer complications compared with older patients. Yet the impact age has on the response to current bone healing treatments, such as delivery of bone morphogenetic protein 2 (BMP‐2), remains poorly characterized. It remains unclear how or if therapeutic dosing of BMP‐2 should be modified to account for age‐related differences in order to minimize potential adverse effects and consequently improve patient bone‐healing outcomes. For this study, we sought to address this issue by using a preclinical critically sized segmental bone defect model in rats to investigate age‐related differences in bone repair after delivery of BMP‐2 in a collagen sponge, the current clinical standard. Femoral defects were created in young (7‐week‐old) and adult (8‐month‐old) rats, and healing was assessed using gene expression analyses, longitudinal radiography, ex vivo micro‐computed tomography (µCT), as well as torsional testing. We found that young rats demonstrated elevated expression of genes related to osteogenesis, chondrogenesis, and matrix remodeling at the early 1‐week time point compared with adult rats. These early gene expression differences may have impacted long‐term healing as the regenerated bones of young rats exhibited higher bone mineral densities compared with those of adult rats after 12 weeks. Furthermore, the young rats demonstrated significantly more bone formation and increased mechanical strength when BMP‐2 dose was increased from 1 µg to 10 µg, a finding not observed in adult rats. Overall, these results indicate there are age‐related differences in BMP‐2‐mediated bone regeneration, including relative dose sensitivity, suggesting that age is an important consideration when implementing a BMP‐2 treatment strategy. © 2018 The Authors JBMR Plus published by Wiley Periodicals, Inc. on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Albert Cheng
- George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA USA.,Parker H. Petit Institute for Bioengineering and Bioscience Georgia Institute of Technology Atlanta GA USA
| | - Laxminarayanan Krishnan
- Parker H. Petit Institute for Bioengineering and Bioscience Georgia Institute of Technology Atlanta GA USA
| | - Lisa Tran
- Emory University School of Medicine Atlanta GA USA
| | - Hazel Y Stevens
- George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA USA
| | - Boao Xia
- George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA USA
| | - Nari Lee
- Emory University Pediatric Engineering Research Summer Experience Atlanta GA USA
| | | | - Greg Gibson
- Center for Integrative Genomics School of Biological Sciences Georgia Institute of Technology Atlanta GA USA
| | - Robert E Guldberg
- George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA USA.,Parker H. Petit Institute for Bioengineering and Bioscience Georgia Institute of Technology Atlanta GA USA
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226
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Li Q, Zhang W, Zhou G, Cao Y, Liu W, Zhang ZY. Demineralized bone matrix-based microcarrier scaffold favors vascularized large bone regeneration in vivo in a rat model. J Biomater Appl 2018; 33:182-195. [PMID: 29950157 DOI: 10.1177/0885328218784370] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Insufficient neo-vascularization of in vivo implanted cell-seeded scaffold remains a major bottleneck for clinical translation of engineered bone formation. Demineralized bone matrix is an ideal bone scaffold for bone engineering due to its structural and biochemical components similar to those of native bone. We hypothesized that the microcarrier form of demineralized bone matrix favors ingrowth of vessels and bone regeneration upon in vivo implantation. In this study, a rat model of femoral vessel pedicle-based bone engineering was employed by filling the demineralized bone matrix scaffolds inside a silicone chamber that surrounded the vessel pedicles, and to compare the efficiency of vascularized bone regeneration between microcarrier demineralized bone matrix and block demineralized bone matrix. The results showed that bone marrow stem cells better adhered to microcarrier demineralized bone matrix and produced more extracellular matrices during in vitro culture. After in vivo implantation, microcarrier demineralized bone matrix seeded with bone marrow stem cells formed relatively more bone tissue than block demineralized bone matrix counterpart at three months upon histological examination. Furthermore, micro-computed tomography three-dimensional reconstruction showed that microcarrier demineralized bone matrix group regenerate significantly better and more bone tissues than block demineralized bone matrix both qualitatively and quantitatively (p < 0.05). Moreover, micro-computed tomography reconstructed angiographic images also demonstrated significantly enhanced tissue vascularization in microcarrier demineralized bone matrix group than in block demineralized bone matrix group both qualitatively and quantitatively (p < 0.05). Anti-CD31 immunohistochemical staining of (micro-) vessels and semi-quantitative analysis also evidenced enhanced vascularization of regenerated bone in microcarrier demineralized bone matrix group than in block demineralized bone matrix group (p < 0.05). In conclusion, the microcarrier form of demineralized bone matrix is an ideal bone regenerative scaffold due to its advantages of osteoinductivity and vascular induction, two essentials for in vivo bone regeneration.
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Affiliation(s)
- Qiannan Li
- 1 Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering Research, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China
| | - Wenjie Zhang
- 1 Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering Research, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China.,2 National Tissue Engineering Center of China, Shanghai, PR China
| | - Guangdong Zhou
- 1 Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering Research, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China.,2 National Tissue Engineering Center of China, Shanghai, PR China
| | - Yilin Cao
- 1 Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering Research, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China.,2 National Tissue Engineering Center of China, Shanghai, PR China
| | - Wei Liu
- 1 Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering Research, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China.,2 National Tissue Engineering Center of China, Shanghai, PR China
| | - Zhi-Yong Zhang
- 1 Department of Plastic and Reconstructive Surgery, Shanghai Key Laboratory of Tissue Engineering Research, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China.,3 Translational Research Centre of Regenerative Medicine and 3D Printing Technologies of Guangzhou Medical University, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China.,4 China Orthopedic Regenerative Medicine Group (CORMed), Hangzhou, PR China
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227
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Tenkumo T, Vanegas Sáenz JR, Nakamura K, Shimizu Y, Sokolova V, Epple M, Kamano Y, Egusa H, Sugaya T, Sasaki K. Prolonged release of bone morphogenetic protein-2 in vivo by gene transfection with DNA-functionalized calcium phosphate nanoparticle-loaded collagen scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 92:172-183. [PMID: 30184740 DOI: 10.1016/j.msec.2018.06.047] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 06/13/2018] [Accepted: 06/21/2018] [Indexed: 01/28/2023]
Abstract
In the combination of scaffolds immersed in growth factor solutions, the release of growth factors mainly depends on scaffold degradation. However, the release of bone morphogenetic protein (BMP)-2 at an appropriate concentration during the stage of tissue regeneration would enhance bone regeneration. To achieve this condition, the present study was performed to investigate the effects of scaffolds combined with gene transfection using non-viral vectors. Nanohydroxyapatite-collagen (nHAC) scaffolds cross-linked with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) or ascorbic acid/copper chloride, and a collagen scaffold (Terdermis®) were prepared, loaded with BMP-2-encoding plasmid DNA-functionalized calcium phosphate nanoparticles (CaP), naked plasmid DNA, or BMP-2 solution, and implanted in rats. The yield of released BMP-2 and its releasing period, respectively, were larger and longer from the scaffolds loaded with CaP than from those incubated with BMP-2 solution. In addition, the alkaline phosphatase activity induced by the CaP-loaded scaffolds was higher. Histological analysis showed that released BMP-2 could be observed on the macrophages or multinuclear giant cells surrounding the nHAC fragments or collagen fibres. TRAP-positive or OCN-positive sites were observed in all groups and a mineralization area was observed in the Terdermis®/CaP sample. The present study demonstrates that gene transfection by scaffold loaded with CaP gene transfer vectors induces a larger yield of BMP-2 for a longer period than by scaffolds loaded with BMP-2 solution or naked plasmid.
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Affiliation(s)
- Taichi Tenkumo
- Laboratory for Redox Regulation, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan.
| | - Juan Ramón Vanegas Sáenz
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate school of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Keisuke Nakamura
- Laboratory for Redox Regulation, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Yoshinaka Shimizu
- Division of Oral Pathology, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Viktoriya Sokolova
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany
| | - Matthias Epple
- Institute for Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstr. 5-7, 45117 Essen, Germany
| | - Yuya Kamano
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Tsutomu Sugaya
- Department of Periodontology and Endodontology, Division of Oral Health Science, Graduate School of Dental Medicine, Hokkaido University, W7 Kita-ku, Sapporo 060-8586, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Tohoku University Graduate school of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
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228
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Klar RM. The Induction of Bone Formation: The Translation Enigma. Front Bioeng Biotechnol 2018; 6:74. [PMID: 29938204 PMCID: PMC6002665 DOI: 10.3389/fbioe.2018.00074] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 05/22/2018] [Indexed: 11/25/2022] Open
Abstract
A paradigmatic shift in the way of thinking is what bone tissue engineering science requires to decrypt the translation conundrum from animal models into human. The deductive work of Urist (1965), who discerned the principle of bone induction from the pioneering works of Senn, Huggins, Lacroix, Levander, and other bone regenerative scientists, provided the basis that has assisted future bone tissue regenerative scientists to extend the bone tissue engineering field and its potential uses for bone regenerative medicine in humans. However, major challenges remain that are preventing the formation of bone by induction clinically. Growing experimental evidence is indicating that bone inductive studies are non-translatable from animal models into a clinical environment. This is preventing bone tissue engineering from reaching the next phase in development. Countless studies are trying to discern how the formation of bone by induction functions mechanistically, so as to try and solve this enigmatic problem. However, are the correct questions being asked? Why do bone inductive animal studies not translate into humans? Why do bone induction principles not yield the same extent of bone formation as an autogenous bone graft? What are bone tissue engineering scientists missing? By critically re-assessing the past and present discoveries of the bone induction field, this review article attempts to re-discover the field of bone formation by induction, identifying some key features that may have been missed. These include a detailed library of all proteins in bones and their arrangement in the 3D superstructure of the bone together with some other important criteria not considered by tissue engineering scientists. The review therefore not only re-iterates possible avenues of research that need to be re-explored but also seeks to guide present and future scientists in how they assess their own research in light of experimental design and results. By addressing these issues bone formation by induction without autografts might finally become clinically viable.
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Affiliation(s)
- Roland M. Klar
- Laboratory of Biomechanics and Experimental Orthopaedics, Department of Orthopaedic Surgery, Physical Medicine and Rehabilitation, University Hospital of Munich (LMU), Munich, Germany
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229
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Ball AN, Donahue SW, Wojda SJ, McIlwraith CW, Kawcak CE, Ehrhart N, Goodrich LR. The challenges of promoting osteogenesis in segmental bone defects and osteoporosis. J Orthop Res 2018; 36:1559-1572. [PMID: 29280510 PMCID: PMC8354209 DOI: 10.1002/jor.23845] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Accepted: 12/04/2017] [Indexed: 02/04/2023]
Abstract
Conventional clinical management of complex bone healing scenarios continues to result in 5-10% of fractures forming non-unions. Additionally, the aging population and prevalence of osteoporosis-related fractures necessitate the further exploration of novel ways to augment osteogenesis in this special population. This review focuses on the current clinical modalities available, and the ongoing clinical and pre-clinical research to promote osteogenesis in segmental bone defects, delayed unions, and osteoporosis. In summary, animal models of fracture repair are often small animals as historically significant large animal models, like the dog, continue to gain favor as companion animals. Small rodents have well-documented limitations in comparing to fracture repair in humans, and few similarities exist. Study design, number of studies, and availability of funding continue to limit large animal studies. Osteoinduction with rhBMP-2 results in robust bone formation, although long-term quality is scrutinized due to poor bone mineral quality. PTH 1-34 is the only FDA approved osteo-anabolic treatment to prevent osteoporotic fractures. Limited to 2 years of clinical use, PTH 1-34 has further been plagued by dose-related ambiguities and inconsistent results when applied to pathologic fractures in systematic human clinical studies. There is limited animal data of PTH 1-34 applied locally to bone defects. Gene therapy continues to gain popularity among researchers to augment bone healing. Non-integrating viral vectors and targeted apoptosis of genetically modified therapeutic cells is an ongoing area of research. Finally, progenitor cell therapies and the content variation of patient-side treatments (e.g., PRP and BMAC) are being studied. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:1559-1572, 2018.
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Affiliation(s)
- Alyssa N. Ball
- Orthopaedic Research Center, College of Veterinary Medicine, Colorado State University, 1678 Campus Delivery, Fort Collins, Colorado 80523-1678
| | - Seth W. Donahue
- Orthopaedic Research Center, College of Veterinary Medicine, Colorado State University, 1678 Campus Delivery, Fort Collins, Colorado 80523-1678,,Department of Mechanical Engineering, Flint Animal Cancer Center, Colorado State University, Fort Collins, Colorado
| | - Samantha J. Wojda
- Orthopaedic Research Center, College of Veterinary Medicine, Colorado State University, 1678 Campus Delivery, Fort Collins, Colorado 80523-1678,,Department of Mechanical Engineering, Flint Animal Cancer Center, Colorado State University, Fort Collins, Colorado
| | - C. Wayne McIlwraith
- Orthopaedic Research Center, College of Veterinary Medicine, Colorado State University, 1678 Campus Delivery, Fort Collins, Colorado 80523-1678
| | - Christopher E. Kawcak
- Orthopaedic Research Center, College of Veterinary Medicine, Colorado State University, 1678 Campus Delivery, Fort Collins, Colorado 80523-1678
| | - Nicole Ehrhart
- Department of Clinical Sciences, Flint Animal Cancer Center, Colorado State University, Fort Collins, Colorado
| | - Laurie R. Goodrich
- Orthopaedic Research Center, College of Veterinary Medicine, Colorado State University, 1678 Campus Delivery, Fort Collins, Colorado 80523-1678
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230
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Terauchi M, Tamura A, Yamaguchi S, Yui N. Enhanced cellular uptake and osteogenic differentiation efficiency of melatonin by inclusion complexation with 2-hydroxypropyl β-cyclodextrin. Int J Pharm 2018; 547:53-60. [PMID: 29803791 DOI: 10.1016/j.ijpharm.2018.05.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/02/2018] [Accepted: 05/24/2018] [Indexed: 01/13/2023]
Abstract
Melatonin (MLT), a hormone secreted from the pineal gland, is recognized as a potential candidate for stimulation of bone regeneration. However, because of its hydrophobicity, the administration of MLT to stimulate bone regeneration is difficult. In this study, an inclusion complex of MLT with 2-hydroxypropyl β-cyclodextrin (HP-β-CD) was prepared to improve the water solubility, and the osteogenic differentiation ability of the inclusion complex was investigated in MC3T3-E1 cells. The formation of HP-β-CD/MLT inclusion complex was confirmed by 1H and 13C nuclear magnetic resonance spectroscopy and wide-angle X-ray diffraction. The water solubility of MLT increased linearly upon addition of HP-β-CD because of the formation of the inclusion complex. Additionally, treatment of the cells with HP-β-CD/MLT inclusion complex showed higher uptake amount of MLT than that treated with free MLT. In addition, treatment of MC3T3-E1 cells with HP-β-CD/MLT inclusion complex increased alkaline phosphatase activity and mineralized matrix deposition, compared to that in free MLT-treated and untreated cells. Furthermore, cells treated with HP-β-CD/MLT inclusion complex exhibited higher expression levels of osteogenic differentiation genes than those in the untreated and free MLT-treated cells. Accordingly, these results suggested that inclusion complexation of MLT with HP-β-CD would be a potential formulation for bone regeneration because of its improved solubility and enhanced osteogenic differentiation efficiency.
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Affiliation(s)
- Masahiko Terauchi
- Department of Organic Biomaterials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan; Department of Maxillofacial Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo, Tokyo 113-8549, Japan
| | - Atsushi Tamura
- Department of Organic Biomaterials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan.
| | - Satoshi Yamaguchi
- Department of Maxillofacial Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo, Tokyo 113-8549, Japan
| | - Nobuhiko Yui
- Department of Organic Biomaterials, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo 101-0062, Japan
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231
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Croes M, Kruyt MC, Groen WM, van Dorenmalen KMA, Dhert WJA, Öner FC, Alblas J. Interleukin 17 enhances bone morphogenetic protein-2-induced ectopic bone formation. Sci Rep 2018; 8:7269. [PMID: 29740080 PMCID: PMC5940874 DOI: 10.1038/s41598-018-25564-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 04/24/2018] [Indexed: 02/06/2023] Open
Abstract
Interleukin 17 (IL-17) stimulates the osteogenic differentiation of progenitor cells in vitro through a synergy with bone morphogenetic protein (BMP)-2. This study investigates whether the diverse responses mediated by IL-17 in vivo also lead to enhanced BMP-2-induced bone formation. Since IL-17 is known to induce osteoclastogenesis, we studied the interactions between IL-17 and BMP-2 in ceramic scaffolds either or not carrying a coating with the bisphosphonate zoledronic acid (ZOL). Histological evaluation revealed that IL-17 alone did not induce any osteoclasts at day 10. On the other hand, BMP-2 clearly stimulated early tissue ingrowth and osteoclastogenesis. Both of these processes were blocked in presence of ZOL. IL-17 signaling restored early vascularized connective tissue formation and osteoclastogenesis induced by BMP-2 in ZOL-coated scaffolds. After 12 weeks, the bone volume induced by co-delivery of BMP-2 and IL-17 was doubled as compared to that induced by BMP-2 alone. We conclude that IL-17 has osteo-stimulatory effects through a synergy with bone-inductive BMP-2. Although local and single application of IL-17 does not mediate osteoclast formation, it could promote other processes involved in bone formation such as connective tissue ingrowth. The use of IL-17 may contribute to the development of improved bone graft substitutes.
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Affiliation(s)
- M Croes
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - M C Kruyt
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - W M Groen
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - K M A van Dorenmalen
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - W J A Dhert
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.,Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3508 TD, Utrecht, The Netherlands
| | - F C Öner
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - J Alblas
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.
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232
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Cleemann R, Sorensen M, Bechtold JE, Soballe K, Baas J. Healing in peri-implant gap with BMP-2 and systemic bisphosphonate is dependent on BMP-2 dose-A canine study. J Orthop Res 2018; 36:1406-1414. [PMID: 28976594 DOI: 10.1002/jor.23766] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 09/22/2017] [Indexed: 02/04/2023]
Abstract
The bone-implant interface of cementless orthopedic implants can be described as a series of uneven sized gaps with discontinuous areas of direct bone-implant contact. Bridging these voids and crevices by addition of an anabolic stimulus to increase new bone formation can potentially improve osseointegration of implants. Bone morphogenetic protein 2 (BMP-2) stimulates osteoblast formation to increase new bone formation but also indirectly stimulates osteoclast activity. In this experiment, we investigate the hypothesis that osseointegration, defined as mechanical push-out and histomorphometry, depends on the dose of BMP-2 when delivered as an anabolic agent with systemic administration of the anti-resorptive agent zoledronate to curb an increase in osteoclast activity. Four porous coated titanium implants (one with each of three doses of surface-applied BMP-2 (15 µg; 60 µg; 240 µg) and untreated) surrounded by a 0.75 mm empty gap, were inserted into the distal femurs of each of twelve canines. Zoledronate IV (0.1 mg/kg) was administered 10 days into the observation period of 4 weeks. Bone-implant specimens were evaluated by mechanical push-out test and histomorphometry. The 15 µg implants had the best fixation on all mechanical parameters and largest surface area covered with new bone compared to the untreated, 60 and 240 µg implants, as well as the highest volume of new bone in the implant gap compared to 60 and 240 µg implants. The results in a canine implant model demonstrated that a narrow range of BMP-2 doses have opposite effects in bridging an empty peri-implant gap with bone, when combined with systemic zoledronate. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:1406-1414, 2018.
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Affiliation(s)
- Rasmus Cleemann
- Orthopaedic Research Laboratory, Aarhus University Hospital, Denmark.,Elective Surgery Center, Silkeborg Regional Hospital, Silkeborg, Denmark
| | - Mette Sorensen
- Department of Orthopaedic Surgery, Regional Hospital Viborg, Viborg, Denmark
| | - Joan E Bechtold
- University of Minnesota Department of Orthopaedic Surgery, Minneapolis Medical Research Foundation, Minneapolis, Minnesota
| | - Kjeld Soballe
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Jorgen Baas
- Department of Orthopaedic Surgery, Aarhus University Hospital, Aarhus, Denmark
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233
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Chen Z, Zhang Z, Feng J, Guo Y, Yu Y, Cui J, Li H, Shang L. Influence of Mussel-Derived Bioactive BMP-2-Decorated PLA on MSC Behavior in Vitro and Verification with Osteogenicity at Ectopic Sites in Vivo. ACS APPLIED MATERIALS & INTERFACES 2018; 10:11961-11971. [PMID: 29561589 DOI: 10.1021/acsami.8b01547] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Osteoinductive activity of the implant in bone healing and regeneration is still a challenging research topic. Therapeutic application of recombinant human bone morphogenetic protein-2 (BMP-2) is a promising approach to enhance osteogenesis. However, high dose and uncontrolled burst release of BMP-2 may introduce edema, bone overgrowth, cystlike bone formation, and inflammation. In this study, low-dose BMP-2 of 1 μg was used to design PLA-PD-BMP for functionalization of polylactic acid (PLA) implants via mussel-inspired polydopamine (PD) assist. For the first time, the binding property and efficiency of the PD coating with BMP-2 were directly demonstrated and analyzed using an antigen-antibody reaction. The obtained PLA-PD-BMP surface immobilized with this low BMP-2 dose can endow the implants with abilities of introducing strong stem cell adhesion and enhanced osteogenicity. Furthermore, in vivo osteoinduction of the PLA-PD-BMP-2 scaffolds was confirmed by a rat ectopic bone model, which is marked as the "gold standard" for the evidence of osteoinductive activity. The microcomputed tomography, Young's modulus, and histology analyses were also employed to demonstrate that PLA-PD-BMP grafted with 1 μg of BMP-2 can induce bone formation. Therefore, the method in this study can be used as a model system to immobilize other growth factors onto various different types of polymer substrates. The highly biomimetic mussel-derived strategy can therefore improve the clinical outcome of polymer-based medical implants in a facile, safe, and effective way.
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235
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McMillan A, Nguyen MK, Gonzalez-Fernandez T, Ge P, Yu X, Murphy WL, Kelly DJ, Alsberg E. Dual non-viral gene delivery from microparticles within 3D high-density stem cell constructs for enhanced bone tissue engineering. Biomaterials 2018; 161:240-255. [PMID: 29421560 PMCID: PMC5826638 DOI: 10.1016/j.biomaterials.2018.01.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 12/24/2017] [Accepted: 01/02/2018] [Indexed: 01/03/2023]
Abstract
High-density mesenchymal stem cell (MSC) aggregates can be guided to form bone-like tissue via endochondral ossification in vitro when culture media is supplemented with proteins, such as growth factors (GFs), to first guide the formation of a cartilage template, followed by culture with hypertrophic factors. Recent reports have recapitulated these results through the controlled spatiotemporal delivery of chondrogenic transforming growth factor-β1 (TGF-β1) and chondrogenic and osteogenic bone morphogenetic protein-2 (BMP-2) from microparticles embedded within human MSC aggregates to avoid diffusion limitations and the lengthy, costly in vitro culture necessary with repeat exogenous supplementation. However, since GFs have limited stability, localized gene delivery is a promising alternative to the use of proteins. Here, mineral-coated hydroxyapatite microparticles (MCM) capable of localized delivery of Lipofectamine-plasmid DNA (pDNA) nanocomplexes encoding for TGF-β1 (pTGF-β1) and BMP-2 (pBMP-2) were incorporated, alone or in combination, within MSC aggregates from three healthy porcine donors to induce sustained production of these transgenes. Three donor populations were investigated in this work due to the noted MSC donor-to-donor variability in differentiation capacity documented in the literature. Delivery of pBMP-2 within Donor 1 aggregates promoted chondrogenesis at week 2, followed by an enhanced osteogenic phenotype at week 4. Donor 2 and 3 aggregates did not promote robust glycosaminoglycan (GAG) production at week 2, but by week 4, Donor 2 aggregates with pTGF-β1/pBMP-2 and Donor 3 aggregates with both unloaded MCM and pBMP-2 enhanced osteogenesis compared to controls. These results demonstrate the ability to promote osteogenesis in stem cell aggregates through controlled, non-viral gene delivery within the cell masses. These findings also indicate the need to screen donor MSC regenerative potential in response to gene transfer prior to clinical application. Taken together, this work demonstrates a promising gene therapy approach to control stem cell fate in biomimetic 3D condensations for treatment of bone defects.
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Affiliation(s)
- Alexandra McMillan
- Department of Pathology Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA
| | - Minh Khanh Nguyen
- Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA
| | - Tomas Gonzalez-Fernandez
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Ireland; Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Ireland; Advanced Materials and Bioengineering Research Centre (AMBERG), Trinity College Dublin and Royal College of Surgeons in Dublin, Ireland; Tissue Engineering Research Group, Dept. of Anatomy, Royal College of Surgeons in Dublin, Ireland
| | - Peilin Ge
- Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA
| | - Xiaohua Yu
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA; Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI, USA
| | - William L Murphy
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI, USA; Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison, Madison, WI, USA; Materials Science Program, University of Wisconsin-Madison, Madison, WI, USA
| | - Daniel J Kelly
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Ireland; Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Ireland; Advanced Materials and Bioengineering Research Centre (AMBERG), Trinity College Dublin and Royal College of Surgeons in Dublin, Ireland; Tissue Engineering Research Group, Dept. of Anatomy, Royal College of Surgeons in Dublin, Ireland
| | - Eben Alsberg
- Department of Biomedical Engineering, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA; Department of Orthopaedic Surgery, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA; The National Center for Regenerative Medicine, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH 44106, USA; School of Dentistry, Kyung Hee University, Seoul, South Korea.
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236
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Dias IR, Camassa JA, Bordelo JA, Babo PS, Viegas CA, Dourado N, Reis RL, Gomes ME. Preclinical and Translational Studies in Small Ruminants (Sheep and Goat) as Models for Osteoporosis Research. Curr Osteoporos Rep 2018; 16:182-197. [PMID: 29460175 DOI: 10.1007/s11914-018-0431-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
PURPOSE OF THE REVIEW This review summarizes research on the use of sheep and goats as large animal models of human osteoporosis for preclinical and translational studies. RECENT FINDINGS The most frequent osteoporotic sheep model used is the ovariectomized sheep with 12 months post-operatively or more and the combined treatment of ovariectomized sheep associated to calcium/vitamin D-deficient diet and glucocorticoid applications for 6 months, but other methods are also described, like pinealectomy or hypothalamic-pituitary disconnection in ovariectomized sheep. The goat model for osteoporosis research has been used in a very limited number of studies in osteoporosis research relative to sheep. These osteoporotic small ruminant models are applied for biomaterial research, bone augmentation, efficacy of implant fixation, fragility fracture-healing process improvement, or bone-defect repair studies in the osteopenic or osteoporotic bone. Sheep are a recognized large animal model for preclinical and translational studies in osteoporosis research and the goat to a lesser extent. Recently, the pathophysiological mechanism underlying induction of osteoporosis in glucocorticoid-treated ovariectomized aged sheep was clarified, being similar to what occurs in postmenopausal women with glucocorticoid-induced osteoporosis. It was also concluded that the receptor activator of NF-κB ligand was stimulated in the late progressive phase of the osteoporosis induced by steroids in sheep. The knowledge of the pathophysiological mechanisms at the cellular and molecular levels of the induction of osteoporosis in small ruminants, if identical to humans, will allow in the future, the use of these animal models with greater confidence in the preclinical and translational studies for osteoporosis research.
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Affiliation(s)
- Isabel R Dias
- Department of Veterinary Sciences, Agricultural and Veterinary Sciences School, University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, 5000-801, Vila Real, Portugal.
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017, Guimarães, Portugal.
- ICVS/3B's-PT Government Associate Laboratory, Guimarães, Braga, Portugal.
| | - José A Camassa
- Department of Veterinary Sciences, Agricultural and Veterinary Sciences School, University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, 5000-801, Vila Real, Portugal
| | - João A Bordelo
- Department of Veterinary Sciences, Agricultural and Veterinary Sciences School, University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, 5000-801, Vila Real, Portugal
| | - Pedro S Babo
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Guimarães, Braga, Portugal
| | - Carlos A Viegas
- Department of Veterinary Sciences, Agricultural and Veterinary Sciences School, University of Trás-os-Montes e Alto Douro (UTAD), Quinta de Prados, 5000-801, Vila Real, Portugal
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Guimarães, Braga, Portugal
| | - Nuno Dourado
- CMEMS-UMinho, Department of Mechanical Engineering, University of Minho, Campus de Azurém, 4804-533, Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Guimarães, Braga, Portugal
| | - Manuela E Gomes
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco, 4805-017, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, Guimarães, Braga, Portugal
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237
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Annamalai RT, Turner PA, Carson WF, Levi B, Kunkel S, Stegemann JP. Harnessing macrophage-mediated degradation of gelatin microspheres for spatiotemporal control of BMP2 release. Biomaterials 2018; 161:216-227. [PMID: 29421557 PMCID: PMC5831261 DOI: 10.1016/j.biomaterials.2018.01.040] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 01/24/2018] [Accepted: 01/25/2018] [Indexed: 02/07/2023]
Abstract
Biomaterials-based approaches to harnessing the immune and inflammatory responses to potentiate wound healing hold important promise. Bone fracture healing is characterized by an acute inflammatory phase, followed by a transition to a regenerative and repair phase. In this study, we developed genipin-crosslinked gelatin microspheres designed to be preferentially degraded by inflammatory (M1) macrophages. Highly crosslinked (>90%) microspheres allowed efficient incorporation of bioactive bone morphogenetic protein 2 (BMP2), a potent stimulator of osteogenesis in progenitor cells, via electrostatic interactions. Release of BMP2 was directly correlated with degradation of the gelatin matrix. Exposure of microspheres to polarized murine macrophages showed that degradation was significantly higher in the presence of M1 macrophages, relative to alternatively activated (M2) macrophages and unpolarized controls. Microsphere degradation in the presence of non-inflammatory cells resulted in very low degradation rates. The expression of matrix metalloproteinases (MMPs) and tissue inhibitors of MMP (TIMPs) by macrophages were consistent with the observed phenotype-dependent degradation rates. Indirect co-culture of BMP2-loaded microspheres and macrophages with isolated adipose-derived mesenchymal stem cells (MSC) showed that M1 macrophages produced the strongest osteogenic response, comparable to direct supplementation of the culture medium with BMP2. Controlled release systems that are synchronized with the inflammatory response have the potential to provide better spatiotemporal control of growth factor delivery and therefore may improve the outcomes of recalcitrant wounds.
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Affiliation(s)
| | - Paul A Turner
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, USA
| | | | - Benjamin Levi
- Department of Surgery, University of Michigan, Ann Arbor, USA
| | - Steven Kunkel
- Department of Pathology, University of Michigan, Ann Arbor, USA
| | - Jan P Stegemann
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, USA.
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238
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Haumer A, Bourgine PE, Occhetta P, Born G, Tasso R, Martin I. Delivery of cellular factors to regulate bone healing. Adv Drug Deliv Rev 2018; 129:285-294. [PMID: 29357301 DOI: 10.1016/j.addr.2018.01.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 01/08/2018] [Accepted: 01/13/2018] [Indexed: 02/06/2023]
Abstract
Bone tissue has a strong intrinsic regenerative capacity, thanks to a delicate and complex interplay of cellular and molecular processes, which tightly involve the immune system. Pathological settings of anatomical, biomechanical or inflammatory nature may lead to impaired bone healing. Innovative strategies to enhance bone repair, including the delivery of osteoprogenitor cells or of potent cytokines/morphogens, indicate the potential of 'orthobiologics', but are not fully satisfactory. Here, we review different approaches based on the delivery of regenerative cues produced by cells but in cell-free, possibly off-the-shelf configurations. Such strategies exploit the paracrine effect of the secretome of mesenchymal stem/stromal cells, presented in soluble form, shuttled through extracellular vesicles, or embedded within the network of extracellular matrix molecules. In addition to osteoinductive molecules, attention is given to factors targeting the resident immune cells, to reshape inflammatory and immunity processes from scarring to regenerative patterns.
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Affiliation(s)
- Alexander Haumer
- Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland; Department of Biomedical Engineering, University of Basel, Switzerland.
| | - Paul Emile Bourgine
- Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland; Department of Biomedical Engineering, University of Basel, Switzerland.
| | - Paola Occhetta
- Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland; Department of Biomedical Engineering, University of Basel, Switzerland.
| | - Gordian Born
- Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland; Department of Biomedical Engineering, University of Basel, Switzerland.
| | - Roberta Tasso
- Ospedale Policlinico San Martino-IST, IRCCS per l'Oncologia, Genova, Italy
| | - Ivan Martin
- Department of Biomedicine, University Hospital Basel, University of Basel, Switzerland; Department of Biomedical Engineering, University of Basel, Switzerland.
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239
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Wang ML, Beredjiklian PK, Steplewski A, Fertala J, Fertala A. Engineering the Second Generation of Therapeutic Cells with Enhanced Targeting of Injured Tissues. Tissue Eng Part A 2018; 24:1293-1300. [PMID: 29478375 DOI: 10.1089/ten.tea.2017.0515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Experimental approaches to improving tissue repair utilize cells and growth factors needed to restore the architecture and function of damaged tissues and organs. Key limitations of these approaches include poor delivery of therapeutic cells and growth factors into injury sites, as well as their short-term retention in target areas. In our earlier studies, we demonstrated that artificial collagen-specific anchor (ACSA) expressed on the surface of therapeutic cells directs them into collagen-rich sites of injury. Moreover, we demonstrated that the ACSA improves the retention of these cells in target sites, thereby promoting tissue repair. To advance the ACSA-based technology, we engineered the second generation of the ACSA-expressing cells able to deliver growth factors to target sites. In this study, we specifically focused on insulin growth factor 1 (IGF1), which enhances the repair of a number of collagen-rich connective tissues, including ligament and tendon. Utilizing gene engineering, we produced IGF1 in the ACSA-expressing cells. Using relevant experimental models, we demonstrated that recombinant IGF1 secreted by these cells maintains its specificity and biological activity. Moreover, our studies show that IGF1 produced by the ACSA-expressing cells cultured in three-dimensional environment promotes the formation of the collagen-rich fibrillar matrix. Furthermore, the engineered cells integrated well with the native collagen-rich tendon tissue. Our study provides strong evidence for the great potential of cells with rationally engineered target-specific receptors to restore damaged connective tissues. Future studies in relevant animal models will determine the utility of these cells in vivo.
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Affiliation(s)
- Mark L Wang
- 1 Department of Orthopaedic Surgery, Division of Orthopaedic Research, Sidney Kimmel Medical School, Thomas Jefferson University , Philadelphia, Pennsylvania.,2 Hand Surgery Division, The Rothman Institute, Thomas Jefferson University , Philadelphia, Pennsylvania
| | - Pedro K Beredjiklian
- 1 Department of Orthopaedic Surgery, Division of Orthopaedic Research, Sidney Kimmel Medical School, Thomas Jefferson University , Philadelphia, Pennsylvania.,2 Hand Surgery Division, The Rothman Institute, Thomas Jefferson University , Philadelphia, Pennsylvania
| | - Andrzej Steplewski
- 1 Department of Orthopaedic Surgery, Division of Orthopaedic Research, Sidney Kimmel Medical School, Thomas Jefferson University , Philadelphia, Pennsylvania
| | - Jolanta Fertala
- 1 Department of Orthopaedic Surgery, Division of Orthopaedic Research, Sidney Kimmel Medical School, Thomas Jefferson University , Philadelphia, Pennsylvania
| | - Andrzej Fertala
- 1 Department of Orthopaedic Surgery, Division of Orthopaedic Research, Sidney Kimmel Medical School, Thomas Jefferson University , Philadelphia, Pennsylvania
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240
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Yan HJ, Casalini T, Hulsart-Billström G, Wang S, Oommen OP, Salvalaglio M, Larsson S, Hilborn J, Varghese OP. Synthetic design of growth factor sequestering extracellular matrix mimetic hydrogel for promoting in vivo bone formation. Biomaterials 2018; 161:190-202. [PMID: 29421555 DOI: 10.1016/j.biomaterials.2018.01.041] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 01/25/2018] [Accepted: 01/25/2018] [Indexed: 01/31/2023]
Abstract
Synthetic scaffolds that possess an intrinsic capability to protect and sequester sensitive growth factors is a primary requisite for developing successful tissue engineering strategies. Growth factors such as recombinant human bone morphogenetic protein-2 (rhBMP-2) is highly susceptible to premature degradation and to provide a meaningful clinical outcome require high doses that can cause serious side effects. We discovered a unique strategy to stabilize and sequester rhBMP-2 by enhancing its molecular interactions with hyaluronic acid (HA), an extracellular matrix (ECM) component. We found that by tuning the initial protonation state of carboxylic acid residues of HA in a covalently crosslinked hydrogel modulate BMP-2 release at physiological pH by minimizing the electrostatic repulsion and maximizing the Van der Waals interactions. At neutral pH, BMP-2 release is primarily governed by Fickian diffusion, whereas at acidic pH both diffusion and electrostatic interactions between HA and BMP-2 become important as confirmed by molecular dynamics simulations. Our results were also validated in an in vivo rat ectopic model with rhBMP-2 loaded hydrogels, which demonstrated superior bone formation with acidic hydrogel as compared to the neutral counterpart. We believe this study provides new insight on growth factor stabilization and highlights the therapeutic potential of engineered matrices for rhBMP-2 delivery and may help to curtail the adverse side effects associated with the high dose of the growth factor.
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Affiliation(s)
- Hong Ji Yan
- Department of Chemistry, The Ångström Laboratory, Uppsala University, SE-751 21, Uppsala, Sweden
| | - Tommaso Casalini
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland; Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zurich, Vladimir-Prelog-Weg 1, 8093, Zurich, Switzerland; Institute of Mechanical Engineering and Material Technology, Department of Innovative Technologies, SUPSI, 6928, Manno, Switzerland
| | | | - Shujiang Wang
- Department of Chemistry, The Ångström Laboratory, Uppsala University, SE-751 21, Uppsala, Sweden
| | - Oommen P Oommen
- Bioengineering and Nanomedicine Lab, Faculty of Biomedical Sciences and Engineering & Biomeditech Institute, Tampere University of Technology, Tampere, 33720, Finland
| | - Matteo Salvalaglio
- Thomas Young Centre and Department of Chemical Engineering, University College London, London WC1E 7JE, UK
| | - Sune Larsson
- Department of Orthopedics, Uppsala University, Uppsala, Sweden
| | - Jöns Hilborn
- Department of Chemistry, The Ångström Laboratory, Uppsala University, SE-751 21, Uppsala, Sweden
| | - Oommen P Varghese
- Department of Chemistry, The Ångström Laboratory, Uppsala University, SE-751 21, Uppsala, Sweden.
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241
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Huang RL, Sun Y, Ho CK, Liu K, Tang QQ, Xie Y, Li Q. IL-6 potentiates BMP-2-induced osteogenesis and adipogenesis via two different BMPR1A-mediated pathways. Cell Death Dis 2018; 9:144. [PMID: 29396550 PMCID: PMC5833364 DOI: 10.1038/s41419-017-0126-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 11/03/2017] [Accepted: 11/07/2017] [Indexed: 02/08/2023]
Abstract
Recombinant human bone morphogenetic protein-2 (rhBMP-2) is widely used in the clinic for bone defect reconstruction because of its powerful osteoinductive capacity. However, commercially available rhBMP-2 requires a high concentration in the clinical setting for consistent bone formation. A high dose of rhBMP-2 induces a promising bone formation yield but also leads to inflammation-related events, deteriorated bone quality, and fatty tissue formation. We hypothesize that the seemingly contradictory phenomenon of coformation of new bone and excessive adipose tissue in rhBMP-2-induced bone voids may be associated with interleukin-6 (IL-6), which is significantly elevated after application of rhBMP-2/absorbable collagen sponge (rhBMP-2/ACS). Here, we show that IL-6 injection enhances new bone regeneration and induces excessive adipose tissue formation in an rhBMP-2/ACS-induced ectopic bone formation model in rats. In vitro data further show that IL-6 and its soluble receptor sIL-6R synergistically augment rhBMP-2-induced osteogenic and adipogenic differentiation of human BMSCs (hBMSCs) by promoting cell surface translocation of BMPR1A and then amplifying BMPR1A-mediated BMP/Smad and p38 MAPK pathways, respectively. Our study suggests elevated IL-6 may be responsible for coformation of new bone and excessive adipose tissue in rhBMP-2-induced bone voids.
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Affiliation(s)
- Ru-Lin Huang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Yangbai Sun
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Chia-Kang Ho
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Kai Liu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Qi-Qun Tang
- Key Laboratory of Metabolism and Molecular Medicine, the Ministry of Education, Department of Biochemistry and Molecular Biology, Fudan University Shanghai Medical College, Shanghai, 200032, China
| | - Yun Xie
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China.
| | - Qingfeng Li
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China.
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242
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Huang H, Dou L, Song J, Luo J. CBFA2T2 is required for BMP-2-induced osteogenic differentiation of mesenchymal stem cells. Biochem Biophys Res Commun 2018; 496:1095-1101. [DOI: 10.1016/j.bbrc.2018.01.144] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 01/23/2018] [Indexed: 01/06/2023]
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243
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Daly AC, Pitacco P, Nulty J, Cunniffe GM, Kelly DJ. 3D printed microchannel networks to direct vascularisation during endochondral bone repair. Biomaterials 2018; 162:34-46. [PMID: 29432987 DOI: 10.1016/j.biomaterials.2018.01.057] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 01/16/2018] [Accepted: 01/30/2018] [Indexed: 01/02/2023]
Abstract
Bone tissue engineering strategies that recapitulate the developmental process of endochondral ossification offer a promising route to bone repair. Clinical translation of such endochondral tissue engineering strategies will require overcoming a number of challenges, including the engineering of large and often anatomically complex cartilage grafts, as well as the persistence of core regions of avascular cartilage following their implantation into large bone defects. Here 3D printing technology is utilized to develop a versatile and scalable approach to guide vascularisation during endochondral bone repair. First, a sacrificial pluronic ink was used to 3D print interconnected microchannel networks in a mesenchymal stem cell (MSC) laden gelatin-methacryloyl (GelMA) hydrogel. These constructs (with and without microchannels) were next chondrogenically primed in vitro and then implanted into critically sized femoral bone defects in rats. The solid and microchanneled cartilage templates enhanced bone repair compared to untreated controls, with the solid cartilage templates (without microchannels) supporting the highest levels of total bone formation. However, the inclusion of 3D printed microchannels was found to promote osteoclast/immune cell invasion, hydrogel degradation, and vascularisation following implantation. In addition, the endochondral bone tissue engineering strategy was found to support comparable levels of bone healing to BMP-2 delivery, whilst promoting lower levels of heterotopic bone formation, with the microchanneled templates supporting the lowest levels of heterotopic bone formation. Taken together, these results demonstrate that 3D printed hypertrophic cartilage grafts represent a promising approach for the repair of complex bone fractures, particularly for larger defects where vascularisation will be a key challenge.
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Affiliation(s)
- Andrew C Daly
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland; Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland; Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Pierluca Pitacco
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland; Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - Jessica Nulty
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland; Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - Gráinne M Cunniffe
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland; Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland
| | - Daniel J Kelly
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland; Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin, Ireland; Department of Anatomy, Royal College of Surgeons in Ireland, Dublin, Ireland; Advanced Materials and Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland and Trinity College Dublin, Dublin, Ireland.
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244
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Hadavi M, Hasannia S, Faghihi S, Mashayekhi F, Homazadeh H, Mostofi SB. Zein nanoparticle as a novel BMP6 derived peptide carrier for enhanced osteogenic differentiation of C2C12 cells. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2018; 46:559-567. [PMID: 29373940 DOI: 10.1080/21691401.2018.1431649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Zein nanoparticles as a carrier system for BMP6-derived peptide were prepared by liquid-liquid phase separation procedure and characterized with SEM, DLS, FTIR and thermogravimetric methods. After peptide encapsulation, nanoparticle size increased from 236.3 ± 92.2 nm to 379.4 ± 116.8 nm. The encapsulation efficiency of peptide was 72.6% and the release of peptide from Zein nanoparticles was partly sustained in trypsin containing phosphate buffered saline (pH 7.4) for up to 14 days. Peptide-loaded nanoparticles showed similar cell viability compared with blank ones. ALP activity of C2C12 cells treated with peptide-loaded nanoparticles (500 µg/mL) was evaluated 7, 14, 21 and 28 days after culture. In peptide-loaded nanoparticles, ALP activity was significantly higher (p < .05) compared with other groups at day 14. Alizarin Red S staining showed, C2C12 cells behind peptide-loaded nanoparticles had significantly (p < .05) higher calcium deposition at day 21. The results of RT-qPCR show that the BMP-6 peptide activated expression of RUNX2 as a transcription factor. In turn, RUNX2 regulates SPP1 and BGLAP gene expression, as osteogenic marker genes. The results confirm that the peptide-loaded Zein nanoparticles, as osteoinductive material, may be used to repair small area of bone defects, with low load bearing.
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Affiliation(s)
- Mahvash Hadavi
- a Department of Stem Cell and Regenerative Medicine , National Institute of Genetic Engineering and Biotechnology, Institute of Medical Biotechnology , Tehran , Iran.,b Department of Biology, Faculty of Science , University of Guilan , Rasht , Iran
| | - Sadegh Hasannia
- c Department of Biochemistry , School of Biological Science, Tarbiat Modares University , Tehran , Iran
| | - Shahab Faghihi
- a Department of Stem Cell and Regenerative Medicine , National Institute of Genetic Engineering and Biotechnology, Institute of Medical Biotechnology , Tehran , Iran
| | - Farhad Mashayekhi
- b Department of Biology, Faculty of Science , University of Guilan , Rasht , Iran
| | - Homayoun Homazadeh
- d Laboratory for Immunoregulation and Tissue Engineering (LITE), Ostrow School of Dentistry of USC , University of Southern California , Los Angeles , CA , USA
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245
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Kim RY, Seong Y, Cho TH, Lee B, Kim IS, Hwang SJ. Local administration of nuclear factor of activated T cells (NFAT) c1 inhibitor to suppress early resorption and inflammation induced by bone morphogenetic protein-2. J Biomed Mater Res A 2018; 106:1299-1310. [PMID: 29316218 DOI: 10.1002/jbm.a.36332] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 11/15/2017] [Accepted: 01/05/2018] [Indexed: 11/05/2022]
Abstract
Nuclear factor of activated T cells (NFAT)-c1 is known as a key regulator in osteoclast differentiation and immune response. This study is a follow-up to our previous study showing the antiresorptive activity of VIVIT, a peptide type NFATc1 inhibitor, using absorbable collagen sponge (ACS). This study aimed to investigate the effective concentration range of local VIVIT that suppresses early excessive osteoclast activation and inflammation induced by high-dose recombinant human bone morphogenetic protein (rhBMP)-2 and concomitantly enhances bone healing in a rat critical-sized calvaria defect model. High-dose rhBMP-2 (40 μg/defect) alone significantly increased in vivo osteoclast activation and expression of the inflammatory cytokines interleukin-1β and transforming necrosis factor-α on the scaffold at 7 days after surgery. However, rhBMP-2 had no direct effect on osteoclast activation in vitro. Osteoclast activation by rhBMP-2 was significantly suppressed by combined treatment with VIVIT at concentrations of 75 and 150 μM, but not at 15 μM, whereas suppression of inflammation occurred at all doses of VIVIT. Microcomputed tomography at 4 and 8 weeks after implantation revealed that the combination of rhBMP-2 and VIVIT at 75 μM VIVIT led to a greater bone fraction at the initial defect area, compared with rhBMP-2 alone. These findings revealed that local administration of VIVIT at certain concentrations has multiple positive effects that weaken early excessive osteoimmunological responses and enhance bone healing after rhBMP-2 administration. VIVIT has the potential to expand the therapeutic area of high-dose rhBMP-2 therapy to inflammatory bone loss. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1299-1310, 2018.
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Affiliation(s)
- Ri Youn Kim
- Dental Research Institute, School of Dentistry, Seoul National University, Seoul, 110-749, Republic of Korea
| | - Yeju Seong
- Dental Research Institute, School of Dentistry, Seoul National University, Seoul, 110-749, Republic of Korea
| | - Tae Hyung Cho
- Dental Research Institute, School of Dentistry, Seoul National University, Seoul, 110-749, Republic of Korea
| | - Beomseok Lee
- Dental Research Institute, School of Dentistry, Seoul National University, Seoul, 110-749, Republic of Korea
| | - In Sook Kim
- Dental Research Institute, School of Dentistry, Seoul National University, Seoul, 110-749, Republic of Korea
| | - Soon Jung Hwang
- Dental Research Institute, School of Dentistry, Seoul National University, Seoul, 110-749, Republic of Korea.,Department of Oral and Maxillofacial Surgery, School of Dentistry, Seoul National University, Seoul, 110-749, Republic of Korea
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246
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Park SY, Kim KH, Park CH, Shin SY, Rhyu IC, Lee YM, Seol YJ. Enhanced Bone Regeneration by Diabetic Cell-Based Adenoviral BMP-2 Gene Therapy in Diabetic Animals. Tissue Eng Part A 2018; 24:930-942. [PMID: 29160182 DOI: 10.1089/ten.tea.2017.0101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The application of bone morphogenetic protein 2 (BMP-2) has been extensively investigated to improve diabetes-impaired bone healing; however, the delivery of BMP-2 by gene therapy for bone regeneration has rarely been investigated in diabetic animals. In this study, we aimed to evaluate which cells induce more new bone formation in diabetic animals when cell-based BMP2 gene therapy is applied. For this purpose, we harvested bone marrow stromal cells (BMSCs) twice in the same animal before (non-diabetic BMSCs; nBMSCs) and after diabetes induction (diabetic BMSCs; dBMSCs) using modified bone marrow ablation methods. And then, cells were transduced by adenoviral vectors carrying the BMP2 gene (AdBMP2). In in vitro, AdBMP2-transfected dBMSCs (B2/dBMSCs) produced higher BMP-2 mRNA levels over 48 h, whereas AdBMP2-transfected nBMSCs (B2/nBMSCs) exhibited a transient increase in BMP-2 mRNA followed by a decrease to the baseline level within 48 h. Both B2/dBMSCs and B2/nBMSCs induced secretion of BMP-2 for 3 weeks. However, B2/dBMSC BMP-2 secretion peaked from day 3 to 10, whereas B2/nBMSC BMP-2 secretion peaked from day 1 to 7. The analysis of osteogenic activity revealed that mineralization nodule formation and the expression levels of osteogenic genes were significantly higher in B2/dBMSCs than B2/nBMSCs and were accompanied by upregulation of canonical Wnt/β-catenin and Smad signaling. AdBMP2-transfected autologous cells were implanted into critical-sized calvarial defects in diabetic animals and induced significantly more bone regeneration than non-AdBMP2-transfected cells. In addition, B2/dBMSCs led to significantly more new bone formation than B2/nBMSCs. Thus, BMP2 gene therapy using diabetic cells effectively supported diabetic bone healing and it was related to the enhanced responses to AdBMP2 of dBMSCs.
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Affiliation(s)
- Shin-Young Park
- 1 Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University , Seoul, Korea.,2 Section of Dentistry, Department of Periodontology, Seoul National University Bundang Hospital , Seongnam, Gyeonggi-do, Korea
| | - Kyoung-Hwa Kim
- 1 Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University , Seoul, Korea
| | - Chan-Ho Park
- 3 Dental Research Institute, Seoul National University , Seoul, Korea
| | - Seung-Yun Shin
- 4 Department of Periodontology, Institute of Oral Biology, School of Dentistry, Kyung Hee University , Seoul, Korea
| | - In-Chul Rhyu
- 1 Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University , Seoul, Korea
| | - Yong-Moo Lee
- 1 Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University , Seoul, Korea
| | - Yang-Jo Seol
- 1 Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University , Seoul, Korea
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247
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Gohil SV, Wang L, Rowe DW, Nair LS. Spatially controlled rhBMP-2 mediated calvarial bone formation in a transgenic mouse model. Int J Biol Macromol 2018; 106:1159-1165. [DOI: 10.1016/j.ijbiomac.2017.08.116] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/18/2017] [Accepted: 08/21/2017] [Indexed: 11/30/2022]
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248
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Tanjaya J, Lord EL, Wang C, Zhang Y, Kim JK, Nguyen A, Baik L, Pan HC, Chen E, Kwak JH, Zhang X, Wu B, Soo C, Ting K. The Effects of Systemic Therapy of PEGylated NEL-Like Protein 1 (NELL-1) on Fracture Healing in Mice. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 188:715-727. [PMID: 29294300 DOI: 10.1016/j.ajpath.2017.11.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 11/04/2017] [Accepted: 11/21/2017] [Indexed: 01/05/2023]
Abstract
Fractures are common, with an incidence of 13.7 per 1000 adults annually. Systemic agents have been widely used for enhancing bone regeneration; however, the efficacy of these therapeutics for the management and prevention of fracture remains unclear. NEL-like protein 1 (NELL-1) is a potent pro-osteogenic cytokine that has been modified with polyethylene glycol (PEG)ylation [PEGylated NELL-1 (NELL-PEG)] to enhance its pharmacokinetics for systemic therapy. Our aim was to investigate the effects of systemic administration of NELL-PEG on fracture healing in mice and on overall bone properties in uninjured bones. Ten-week-old CD-1 mice were subjected to an open osteotomy of bilateral radii and treated with weekly injections of NELL-PEG or PEG phosphate-buffered saline as control. Systemic injection of NELL-PEG resulted in improved bone mineral density of the fracture site and accelerated callus union. After 4 weeks of treatment, mice treated with NELL-PEG exhibited substantially enhanced callus volume, callus mineralization, and biomechanical properties. NELL-PEG injection significantly augmented bone regeneration, as confirmed by high expression of bone turnover rate, bone formation rate, and mineral apposition rate. Consistently, the immunohistochemistry results also confirmed a high bone remodeling activity in the NELL-PEG-treated group. Our findings suggest that weekly injection of NELL-PEG may have the clinical potential to accelerate fracture union and enhance overall bone properties, which may help prevent subsequent fractures.
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Affiliation(s)
- Justine Tanjaya
- Division of Growth and Development and the Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Elizabeth L Lord
- Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, University of California, Los Angeles, Los Angeles, California
| | - Chenchao Wang
- Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California; Department of Plastic Surgery, First Hospital of China Medical University, Shenyang, China
| | - Yulong Zhang
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California; Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California
| | - Jong K Kim
- Division of Growth and Development and the Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Alan Nguyen
- Division of Growth and Development and the Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Llyod Baik
- Division of Growth and Development and the Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Hsin C Pan
- Division of Growth and Development and the Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Eric Chen
- Division of Growth and Development and the Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Jin H Kwak
- Division of Growth and Development and the Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Xinli Zhang
- Division of Growth and Development and the Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California
| | - Benjamin Wu
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California; Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California
| | - Chia Soo
- Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, University of California, Los Angeles, Los Angeles, California; Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California
| | - Kang Ting
- Division of Growth and Development and the Section of Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California.
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249
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Outcome of nonunion fractures in dogs treated with fixation, compression resistant matrix, and recombinant human bone morphogenetic protein-2. Vet Comp Orthop Traumatol 2017; 30:153-159. [DOI: 10.3415/vcot-16-05-0082] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 11/09/2016] [Indexed: 11/17/2022]
Abstract
SummaryObjectives: To report the use of compression resistant matrix (CRM) infused with recombinant human bone morphogenetic protein (rhBMP-2) prospectively in the healing of non union long-bone fractures in dogs.Methods: A longitudinal cohort of dogs that were presented with nonunion fractures were classified and treated with CRM soaked with rhBMP-2 and fracture fixation. They were followed with serial radiographs and evaluated for healing times and complications according to the time frame and definitions previously established for orthopaedic clinical cases.Results: Eleven nonunion fractures in nine dogs were included. Median healing time was 10 weeks (range: 7–20 weeks). Major perioperative complications due to bandage morbidity were encountered in two of 11 limbs and resolved. All other complications were minor. They occurred perioperatively in eight of 11 limbs. Minor follow-up complications included short-term in one of two limbs, mid-term in one of three, and long-term in four of five limbs. Nine limbs returned to full function and two limbs returned to acceptable function at the last follow-up.Clinical significance: Nonunion fractures given a poor prognosis via standard-of-care treatment were successfully repaired using CRM with rhBMP-2 accompanying fixation. These dogs, previously at high risk of failure, returned to full or acceptable function.
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250
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Kim HS, Park JC, Yun PY, Kim YK. Evaluation of bone healing using rhBMP-2 soaked hydroxyapatite in ridge augmentation: a prospective observational study. Maxillofac Plast Reconstr Surg 2017; 39:40. [PMID: 29302589 PMCID: PMC5742315 DOI: 10.1186/s40902-017-0138-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 11/20/2017] [Indexed: 11/16/2022] Open
Abstract
Background The goal of this study is to evaluate complication and effectiveness of alveolar ridge augmentations using a hydroxyapatite-based alloplastic bony substitute with rhBMP-2. Methods A total of 10 patients (4 males, 6 females; 58.5 ± 8.6 years) participated in this clinical research. Alveolar ridge augmentations were performed in edentulous (4 maxillary posterior, 5 mandibular posterior, and 1 mandibular anterior) regions. Anorganic bovine bone (ABB; Bio-Oss®, Geistlich Pharma AG, Wolhusen, Switzerland) was used as the bone graft material in the control group (n = 5)) while hydroxyapatite-based alloplastic bony substitute with rhBMP-2(HA+rhBMP-2; NOVOSIS®-Dent, CGBio Inc., Seongnam, Korea) was used in the experimental group (n = 5). In order to evaluate relative changes in bone volume and resorption rate of the bone graft material, CBCT radiographs were taken immediately and at 4 months after the bone graft in all subjects. Among the 10 patients, 8 received dental implants in Seoul National University Bundang Hospital, while the others received in local clinics. Bone specimens for further histomorphometric examinations were gained from these 8 patients using trephine burs during the implant placements. Clinical, radiographic, and histomorphometric evaluations were focused because of the small sample size. Results When CBCT radiographs were compared between immediately and at 4.07 ± 0.13 months after the bone graft, both alveolar bone widths (ABB 2.52 ± 0.18 mm, HA+rhBMP-2 1.75 ± 0.85 mm) and heights (ABB 1.68 ± 0.17 mm, HA+rhBMP-2 1.57 ± 0.28 mm) increased in the two groups. Resorption rates of transplanted bone graft material in the alveolar bone widths and heights were (ABB 29.7 ± 8.8%, HA+rhBMP-2 31.5 ± 7.4%) and (ABB 39.2 ± 21.8%, HA+rhBMP-2 52.6 ± 6.5%), respectively. Histomorphometrically, ABB group showed bone formation via osteoconduction and HA+rhBMP-2 group via osteoinduction. HA+rhBMP-2 group showed more bone formation around the bone graft materials than the ABB group. Postoperative complications were not found in all subjects. Conclusions Our study had following conclusions: (1) Ridge augmentations using HA+rhBMP-2 could be clinically useful to supplement implant placements in edentulous regions. (2) Serious postoperative complications related to the graft material did not occur. Electronic supplementary material The online version of this article (10.1186/s40902-017-0138-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hyun-Suk Kim
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam, Gyunggi-do South Korea
| | - Ju-Cheol Park
- Department of Oral Histology, School of Dentistry, Seoul National University, Daehak-ro 101, Jongno-gu, Seoul, 03080 South Korea.,Department of Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, Daehak-ro 101, Jongno-gu, Seoul, 03080 South Korea
| | - Pil-Young Yun
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam, Gyunggi-do South Korea
| | - Young-Kyun Kim
- Department of Oral and Maxillofacial Surgery, Section of Dentistry, Seoul National University Bundang Hospital, 300 Gumi-dong, Bundang-gu, Seongnam, Gyunggi-do South Korea.,Department of Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, Daehak-ro 101, Jongno-gu, Seoul, 03080 South Korea
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