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Stavropoulos A, Sculean A, Bosshardt DD, Buser D, Klinge B. Pre-clinical in vivo models for the screening of bone biomaterials for oral/craniofacial indications: focus on small-animal models. Periodontol 2000 2017; 68:55-65. [PMID: 25867979 DOI: 10.1111/prd.12065] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2014] [Indexed: 11/26/2022]
Abstract
Preclinical in vivo experimental studies are performed for evaluating proof-of-principle concepts, safety and possible unwanted reactions of candidate bone biomaterials before proceeding to clinical testing. Specifically, models involving small animals have been developed for screening bone biomaterials for their potential to enhance bone formation. No single model can completely recreate the anatomic, physiologic, biomechanic and functional environment of the human mouth and jaws. Relevant aspects regarding physiology, anatomy, dimensions and handling are discussed in this paper to elucidate the advantages and disadvantages of small-animal models. Model selection should be based not on the 'expertise' or capacities of the team, but rather on a scientifically solid rationale, and the animal model selected should reflect the question for which an answer is sought. The rationale for using heterotopic or orthotopic testing sites, and intraosseous, periosseous or extraskeletal defect models, is discussed. The paper also discusses the relevance of critical size defect modeling, with focus on calvarial defects in rodents. In addition, the rabbit sinus model and the capsule model in the rat mandible are presented and discussed in detail. All animal experiments should be designed with care and include sample-size and study-power calculations, thus allowing generation of meaningful data. Moreover, animal experiments are subject to ethical approval by the relevant authority. All procedures and the postoperative handling and care, including postoperative analgesics, should follow best practice.
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Suzuki D, Akita D, Tsurumachi N, Kano K, Yamanaka K, Kaneko T, Kawano E, Iguchi S, Toriumi T, Arai Y, Matsumoto T, Sato S, Honda M. Transplantation of mature adipocyte-derived dedifferentiated fat cells into three-wall defects in the rat periodontium induces tissue regeneration. J Oral Sci 2017; 59:611-620. [DOI: 10.2334/josnusd.16-0878] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Daigo Suzuki
- Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry
| | - Daisuke Akita
- Department of Partial Denture Prosthodontics, Nihon University School of Dentistry
| | - Niina Tsurumachi
- Department of Orthodontics, Nihon University School of Dentistry
| | - Koichiro Kano
- Laboratory of Cell and Tissue Biology, College of Bioresource Sciences, Nihon University
| | | | | | - Eisuke Kawano
- Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry
| | - Shinya Iguchi
- Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry
| | - Taku Toriumi
- Department of Anatomy, Nihon University School of Dentistry
- Division of Functional Morphology, Dental Research Center, Nihon University School of Dentistry
| | | | - Taro Matsumoto
- Department of Functional Morphology, Division of Cell Regeneration and Transplantation, Nihon University School of Medicine
| | - Shuichi Sato
- Department of Periodontology, Nihon University School of Dentistry
- Division of Advanced Dental Treatment, Dental Research Center, Nihon University School of Dentistry
| | - Masaki Honda
- Department of Oral Anatomy, Aichi Gakuin University School of Dentistry
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Shanbhag S, Pandis N, Mustafa K, Nyengaard JR, Stavropoulos A. Cell Cotransplantation Strategies for Vascularized Craniofacial Bone Tissue Engineering: A Systematic Review and Meta-Analysis of Preclinical In Vivo Studies. TISSUE ENGINEERING PART B-REVIEWS 2016; 23:101-117. [PMID: 27733094 DOI: 10.1089/ten.teb.2016.0283] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The regenerative potential of tissue-engineered bone constructs may be enhanced by in vitro coculture and in vivo cotransplantation of vasculogenic and osteogenic (progenitor) cells. The objective of this study was to systematically review the literature to answer the focused question: In animal models, does cotransplantation of osteogenic and vasculogenic cells enhance bone regeneration in craniofacial defects, compared with solely osteogenic cell-seeded constructs? Following PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines, electronic databases were searched for controlled animal studies reporting cotransplantation of endothelial cells (ECs) with mesenchymal stem cells (MSCs) or osteoblasts in craniofacial critical size defect (CSD) models. Twenty-two studies were included comparing outcomes of MSC/scaffold versus MSC+EC/scaffold (co)transplantation in calvarial (n = 15) or alveolar (n = 7) CSDs of small (rodents, rabbits) and large animal (minipigs, dogs) models. On average, studies presented with an unclear to high risk of bias. MSCs were derived from autologous, allogeneic, xenogeneic, or human (bone marrow, adipose tissue, periosteum) sources; in six studies, ECs were derived from MSCs by endothelial differentiation. In most studies, MSCs and ECs were cocultured in vitro (2-17 days) before implantation. Coculture enhanced MSC osteogenic differentiation and an optimal MSC:EC seeding ratio of 1:1 was identified. Alloplastic copolymer or composite scaffolds were most often used for in vivo implantation. Random effects meta-analyses were performed for histomorphometric and radiographic new bone formation (%NBF) and vessel formation in rodents' calvarial CSDs. A statistically significant benefit in favor of cotransplantation versus MSC-only transplantation for radiographic %NBF was observed in rat calvarial CSDs (weighted mean difference 7.80% [95% confidence interval: 1.39-14.21]); results for histomorphometric %NBF and vessel formation were inconclusive. Overall, heterogeneity in the meta-analyses was high (I2 > 80%). In summary, craniofacial bone regeneration is enhanced by cotransplantation of vasculogenic and osteogenic cells. Although the direction of treatment outcome is in favor of cotransplantation strategies, the magnitude of treatment effect does not seem to be of relevance, unless proven otherwise in clinical studies.
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Affiliation(s)
- Siddharth Shanbhag
- 1 Department of Clinical Dentistry, Centre for Clinical Dental Research, University of Bergen , Bergen, Norway .,2 Department of Periodontology, Faculty of Odontology, Malmö University , Malmö, Sweden
| | - Nikolaos Pandis
- 3 Department of Orthodontics and Dentofacial Orthopedics, School of Dental Medicine, University of Bern , Bern, Switzerland
| | - Kamal Mustafa
- 1 Department of Clinical Dentistry, Centre for Clinical Dental Research, University of Bergen , Bergen, Norway
| | - Jens R Nyengaard
- 4 Stereology and Electron Microscopy Laboratory, Department of Clinical Medicine, Aarhus University , Aarhus, Denmark
| | - Andreas Stavropoulos
- 2 Department of Periodontology, Faculty of Odontology, Malmö University , Malmö, Sweden
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Cho H, Tarafder S, Fogge M, Kao K, Lee CH. Periodontal ligament stem/progenitor cells with protein-releasing scaffolds for cementum formation and integration on dentin surface. Connect Tissue Res 2016; 57:488-495. [PMID: 27215800 DOI: 10.1080/03008207.2016.1191478] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
UNLABELLED Purpose/Aim: Cementogenesis is a critical step in periodontal tissue regeneration given the essential role of cementum in anchoring teeth to the alveolar bone. This study is designed to achieve integrated cementum formation on the root surfaces of human teeth using growth factor-releasing scaffolds with periodontal ligament stem/progenitor cells (PDLSCs). MATERIALS AND METHODS Human PDLSCs were sorted by CD146 expression, and characterized using CFU-F assay and induced multi-lineage differentiation. Polycaprolactone scaffolds were fabricated using 3D printing, embedded with poly(lactic-co-glycolic acids) (PLGA) microspheres encapsulating connective tissue growth factor (CTGF), bone morphogenetic protein-2 (BMP-2), or bone morphogenetic protein-7 (BMP-7). After removing cementum on human tooth roots, PDLSC-seeded scaffolds were placed on the exposed dentin surface. After 6-week culture with cementogenic/osteogenic medium, cementum formation and integration were evaluated by histomorphometric analysis, immunofluorescence, and qRT-PCR. RESULTS Periodontal ligament (PDL) cells sorted by CD146 and single-cell clones show a superior clonogenecity and multipotency as compared with heterogeneous populations. After 6 weeks, all the growth factor-delivered groups showed resurfacing of dentin with a newly formed cementum-like layer as compared with control. BMP-2 and BMP-7 showed de novo formation of tissue layers significantly thicker than all the other groups, whereas CTGF and BMP-7 resulted in significantly improved integration on the dentin surface. The de novo mineralized tissue layer seen in BMP-7-treated samples expressed cementum matrix protein 1 (CEMP1). Consistently, BMP-7 showed a significant increase in CEMP1 mRNA expression. CONCLUSION Our findings represent important progress in stem cell-based cementum regeneration as an essential part of periodontium regeneration.
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Affiliation(s)
- Hankyu Cho
- a Regenerative Engineering Laboratory , Columbia University Medical Center , New York , NY , USA
| | - Solaiman Tarafder
- a Regenerative Engineering Laboratory , Columbia University Medical Center , New York , NY , USA
| | - Michael Fogge
- a Regenerative Engineering Laboratory , Columbia University Medical Center , New York , NY , USA
| | - Kristy Kao
- a Regenerative Engineering Laboratory , Columbia University Medical Center , New York , NY , USA
| | - Chang H Lee
- a Regenerative Engineering Laboratory , Columbia University Medical Center , New York , NY , USA
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Mele L, Vitiello PP, Tirino V, Paino F, De Rosa A, Liccardo D, Papaccio G, Desiderio V. Changing Paradigms in Cranio-Facial Regeneration: Current and New Strategies for the Activation of Endogenous Stem Cells. Front Physiol 2016; 7:62. [PMID: 26941656 PMCID: PMC4764712 DOI: 10.3389/fphys.2016.00062] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 02/09/2016] [Indexed: 12/20/2022] Open
Abstract
Craniofacial area represent a unique district of human body characterized by a very high complexity of tissues, innervation and vascularization, and being deputed to many fundamental function such as eating, speech, expression of emotions, delivery of sensations such as taste, sight, and earing. For this reasons, tissue loss in this area following trauma or for example oncologic resection, have a tremendous impact on patients' quality of life. In the last 20 years regenerative medicine has emerged as one of the most promising approach to solve problem related to trauma, tissue loss, organ failure etc. One of the most powerful tools to be used for tissue regeneration is represented by stem cells, which have been successfully implanted in different tissue/organs with exciting results. Nevertheless, both autologous and allogeneic stem cell transplantation raise many practical and ethical concerns that make this approach very difficult to apply in clinical practice. For this reason different cell free approaches have been developed aiming to the mobilization, recruitment, and activation of endogenous stem cells into the injury site avoiding exogenous cells implant but instead stimulating patients' own stem cells to repair the lesion. To this aim many strategies have been used including functionalized bioscaffold, controlled release of stem cell chemoattractants, growth factors, BMPs, Platelet-Rich-Plasma, and other new strategies such as ultrasound wave and laser are just being proposed. Here we review all the current and new strategies used for activation and mobilization of endogenous stem cells in the regeneration of craniofacial tissue.
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Affiliation(s)
- Luigi Mele
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
| | - Pietro Paolo Vitiello
- Medical Oncology, Dipartimento Medico-Chirurgico di Internistica Clinica e Sperimentale "F. Magrassi e A. Lanzara," Second University of Naples Naples, Italy
| | - Virginia Tirino
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
| | - Francesca Paino
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
| | - Alfredo De Rosa
- Department of Odontology and Surgery, Second University of Naples Naples, Italy
| | - Davide Liccardo
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
| | - Gianpaolo Papaccio
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
| | - Vincenzo Desiderio
- Department of Experimental Medicine, Section of Biotechnology and Medical Histology and Embryology, Second University of Naples Naples, Italy
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Renaud M, Farkasdi S, Pons C, Panayotov I, Collart-Dutilleul PY, Taillades H, Desoutter A, Bousquet P, Varga G, Cuisinier F, Yachouh J. A New Rat Model for Translational Research in Bone Regeneration. Tissue Eng Part C Methods 2016; 22:125-131. [PMID: 26472155 DOI: 10.1089/ten.tec.2015.0187] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The European Union (EU) directive 2010/63/EU on the protection of animals used for scientific purpose focused on reducing the number of animals and refinement of breeding. Animal studies are necessary to protect human health. Lots of animal models exist to study bone regeneration, but a reliable, well reproducible, and relatively inexpensive model with the possibility for multiple testing in the same animal is still missing. Rats may serve as good models for this due to the small animal size and good cost/benefit ratio. The present study aimed to develop a novel rat caudal vertebrae critical size defect model for bone regeneration and implant osseointegration studies The study was performed using Wistar rats with weight from 380 to 450 g. An incision was made on the dorsal side of the tail. After skin and muscles retractions, the vertebrae were exposed. Critical size defects for bone tissue engineering or implant placements for titanium body experiments were possible in each of the first four caudal vertebrae. Micro-computed tomography (CT) and histology were used to detect bone growth. There was no bone formation in the defects after 1 or 2 months of healing. When a calcium phosphate biomaterial was used (Bio-Oss®; Geistlich Pharma AG, Wolhusen, Switzerland), a good stability of the material in the defect was noted and bone growth was visible after 1 or 2 months. Results based on implant placement showed good primary stability after 3 months of healing. MicroCT showed integrated implant position through the vertebra. These results suggest that the rat caudal vertebrae may serve as a good new model for studying bone regeneration and implant osseointegration with the possibility of multiple testing within the same experimental animal and the potential to decrease number of experimental animals.
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Affiliation(s)
- Matthieu Renaud
- 1 Laboratoire Bioingénierie et Nanosciences EA4203, Université Montpellier , Montpellier, France
| | - Sandor Farkasdi
- 2 Department of Oral Biology, Semmelweis University , Budapest, Hungary
| | - Coline Pons
- 1 Laboratoire Bioingénierie et Nanosciences EA4203, Université Montpellier , Montpellier, France
| | - Ivan Panayotov
- 1 Laboratoire Bioingénierie et Nanosciences EA4203, Université Montpellier , Montpellier, France
| | | | - Hubert Taillades
- 3 Animalerie, Faculté de médecine, Université Montpellier, Montpellier, France
| | - Alban Desoutter
- 1 Laboratoire Bioingénierie et Nanosciences EA4203, Université Montpellier , Montpellier, France
| | - Philippe Bousquet
- 1 Laboratoire Bioingénierie et Nanosciences EA4203, Université Montpellier , Montpellier, France
| | - Gabor Varga
- 2 Department of Oral Biology, Semmelweis University , Budapest, Hungary
| | - Frédéric Cuisinier
- 1 Laboratoire Bioingénierie et Nanosciences EA4203, Université Montpellier , Montpellier, France
| | - Jacques Yachouh
- 1 Laboratoire Bioingénierie et Nanosciences EA4203, Université Montpellier , Montpellier, France
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57
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Kim DG, Elias KL, Jeong YH, Kwon HJ, Clements M, Brantley WA, Lee DJ, Han JS. Differences between buccal and lingual bone quality and quantity of peri-implant regions. J Mech Behav Biomed Mater 2016; 60:48-55. [PMID: 26773652 DOI: 10.1016/j.jmbbm.2015.12.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 12/22/2015] [Accepted: 12/23/2015] [Indexed: 10/22/2022]
Abstract
The objective of the current study was to examine whether peri-implant bone tissue properties are different between the buccal and lingual regions treated by growth factors. Four dental implant groups were used: titanium (Ti) implants, alumina-blasted zirconia implants (ATZ-N), alumina-blasted zirconia implants with demineralized bone matrix (DBM) (ATZ-D), and alumina-blasted zirconia implants with rhBMP-2 (ATZ-B). These implants were placed in mandibles of six male dogs. Nanoindentation elastic modulus (E) and plastic hardness (H) were measured for the buccal and lingual bone tissues adjacent and away from the implants at 3 and 6 weeks post-implantation. A total of 2281 indentations were conducted for 48 placed implants. The peri-implant buccal region had less bone quantity resulting from lower height and narrower width of bone tissue than the lingual region. Buccal bone tissues had significant greater mean values of E and H than lingual bone tissues at each distance and healing period (p<0.007). Nearly all implant treatment groups displayed lower mean values of the E at the lingual bone tissues than at the buccal bone tissues (p<0.046) although the difference was not significant for the Ti implant group (p=0.758). The DBM and rhBMP-2 treatments stimulated more peri-implant bone remodeling at the lingual region, producing more immature new bone tissues with lower E than at the buccal region. This finding suggests that the growth factor treatments to the zirconia implant system may help balance the quantity and quality differences between the peri-implant bone tissues.
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Affiliation(s)
- Do-Gyoon Kim
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA.
| | - Kathy L Elias
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Yong-Hoon Jeong
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Hyun-Jung Kwon
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Matthew Clements
- Division of Orthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - William A Brantley
- Division of Restorative Science and Prosthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Damian J Lee
- Division of Restorative Science and Prosthodontics, College of Dentistry, The Ohio State University, Columbus, OH 43210, USA
| | - Jung-Suk Han
- Department of Prosthodontics, Seoul National University, Seoul, Republic of Korea
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Tsumanuma Y, Iwata T, Kinoshita A, Washio K, Yoshida T, Yamada A, Takagi R, Yamato M, Okano T, Izumi Y. Allogeneic Transplantation of Periodontal Ligament-Derived Multipotent Mesenchymal Stromal Cell Sheets in Canine Critical-Size Supra-Alveolar Periodontal Defect Model. Biores Open Access 2016; 5:22-36. [PMID: 26862470 PMCID: PMC4744877 DOI: 10.1089/biores.2015.0043] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Periodontitis is a chronic inflammatory disease that induces the destruction of tooth-supporting tissues, followed by tooth loss. Although several approaches have been applied to periodontal regeneration, complete periodontal regeneration has not been accomplished. Tissue engineering using a combination of cells and scaffolds is considered to be a viable alternative strategy. We have shown that autologous transplantation of periodontal ligament-derived multipotent mesenchymal stromal cell (PDL-MSC) sheets regenerates periodontal tissue in canine models. However, the indications for autologous cell transplantation in clinical situations are limited. Therefore, this study evaluated the safety and efficacy of allogeneic transplantation of PDL-MSC sheets using a canine horizontal periodontal defect model. Canine PDL-MSCs were labeled with enhanced green fluorescent protein (EGFP) and were cultured on temperature-responsive dishes. Three-layered cell sheets were transplanted around denuded root surfaces either autologously or allogeneically. A mixture of β-tricalcium phosphate and collagen gel was placed on the bone defects. Eight weeks after transplantation, dogs were euthanized and subjected to microcomputed tomography and histological analyses. RNA and DNA were extracted from the paraffin sections to verify the presence of EGFP at the transplantation site. Inflammatory markers from peripheral blood sera were quantified using an enzyme-linked immunosorbent assay. Periodontal regeneration was observed in both the autologous and the allogeneic transplantation groups. The allogeneic transplantation group showed particularly significant regeneration of newly formed cementum, which is critical for the periodontal regeneration. Serum levels of inflammatory markers from peripheral blood sera showed little difference between the autologous and allogeneic groups. EGFP amplicons were detectable in the paraffin sections of the allogeneic group. These results suggest that allogeneic PDL-MSC sheets promoted periodontal tissue regeneration without side effects. Therefore, allogeneic transplantation of PDL-MSC sheets has a potential to become an alternative strategy for periodontal regeneration.
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Affiliation(s)
- Yuka Tsumanuma
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
| | - Takanori Iwata
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University , Tokyo, Japan
| | - Atsuhiro Kinoshita
- Department of Educational Media Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
| | - Kaoru Washio
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University , Tokyo, Japan
| | - Toshiyuki Yoshida
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University , Tokyo, Japan
| | - Azusa Yamada
- Department of Behavioral Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
| | - Ryo Takagi
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University , Tokyo, Japan
| | - Masayuki Yamato
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University , Tokyo, Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University , Tokyo, Japan
| | - Yuichi Izumi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University , Tokyo, Japan
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Abstract
Bone defects do not heal in 5-10% of the fractures. In order to enhance bone regeneration, drug delivery systems are needed. They comprise a scaffold with or without inducing factors and/or cells. To test these drug delivery systems before application in patients, they finally need to be tested in animal models. The choice of animal model depends on the main research question; is a functional or mechanistic evaluation needed? Furthermore, which type of bone defects are investigated: load-bearing (i.e. orthopedic) or non-load-bearing (i.e. craniomaxillofacial)? This determines the type of model and in which type of animal. The experiments need to be set-up using the 3R principle and must be reported following the ARRIVE guidelines.
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Li W, Ma G, Brazile B, Li N, Dai W, Butler JR, Claude AA, Wertheim JA, Liao J, Wang B. Investigating the Potential of Amnion-Based Scaffolds as a Barrier Membrane for Guided Bone Regeneration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8642-8653. [PMID: 26158559 DOI: 10.1021/acs.langmuir.5b02362] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Guided bone regeneration is a new concept of large bone defect therapy, which employs a barrier membrane to afford a protected room for osteogenesis and prevent the invasion of fibroblasts. In this study, we developed a novel barrier membrane made from lyophilized multilayered acellular human amnion membranes (AHAM). After decellularization, the AHAM preserved the structural and biomechanical integrity of the amnion extracellular matrix (ECM). The AHAM also showed minimal toxic effects when cocultured with mesenchymal stem cells (MSCs), as evidenced by high cell density, good cell viability, and efficient osteogenic differentiation after 21-day culturing. The effectiveness of the multilayered AHAM in guiding bone regeneration was evaluated using an in vivo rat tibia defect model. After 6 weeks of surgery, the multilayered AHAM showed great efficiency in acting as a shield to avoid the invasion of the fibrous tissues, stabilizing the bone grafts and inducing the massive bone growth. We hence concluded that the advantages of the lyophilized multilayered AHAM barrier membrane are as follows: preservation of the structural and mechanical properties of the amnion ECM, easiness for preparation and handling, flexibility in adjusting the thickness and mechanical properties to suit the application, and efficiency in inducing bone growth and avoiding fibrous tissues invasion.
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Affiliation(s)
- Wuwei Li
- †Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Liaoning 116001, China
| | - Guowu Ma
- †Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Liaoning 116001, China
| | - Bryn Brazile
- ‡Department of Biological Engineering and College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Nan Li
- †Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Liaoning 116001, China
| | - Wei Dai
- §Department of Operation Room, The First Affiliated Hospital, Dalian Medical University, Liaoning 116001, China
| | - J Ryan Butler
- ‡Department of Biological Engineering and College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Andrew A Claude
- ‡Department of Biological Engineering and College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Jason A Wertheim
- ∥Comprehensive Transplant Center and Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, United States
| | - Jun Liao
- ‡Department of Biological Engineering and College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Bo Wang
- †Department of Oral and Maxillofacial Surgery, School of Stomatology, Dalian Medical University, Liaoning 116001, China
- ∥Comprehensive Transplant Center and Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, United States
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61
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Standardized in vivo model for studying novel regenerative approaches for multitissue bone–ligament interfaces. Nat Protoc 2015; 10:1038-49. [DOI: 10.1038/nprot.2015.063] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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62
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Herrmann M, Verrier S, Alini M. Strategies to Stimulate Mobilization and Homing of Endogenous Stem and Progenitor Cells for Bone Tissue Repair. Front Bioeng Biotechnol 2015; 3:79. [PMID: 26082926 PMCID: PMC4451737 DOI: 10.3389/fbioe.2015.00079] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 05/16/2015] [Indexed: 12/17/2022] Open
Abstract
The gold standard for the treatment of critical-size bone defects is autologous or allogenic bone graft. This has several limitations including donor site morbidity and the restricted supply of graft material. Cell-based tissue engineering strategies represent an alternative approach. Mesenchymal stem cells (MSCs) have been considered as a source of osteoprogenitor cells. More recently, focus has been placed on the use of endothelial progenitor cells (EPCs), since vascularization is a critical step in bone healing. Although many of these approaches have demonstrated effectiveness for bone regeneration, cell-based therapies require time consuming and cost-expensive in vitro cell expansion procedures. Accordingly, research is becoming increasingly focused on the homing and stimulation of native cells. The stromal cell-derived factor-1 (SDF-1) - CXCR4 axis has been shown to be critical for the recruitment of MSCs and EPCs. Vascular endothelial growth factor (VEGF) is a key factor in angiogenesis and has been targeted in many studies. Here, we present an overview of the different approaches for delivering homing factors to the defect site by absorption or incorporation to biomaterials, gene therapy, or via genetically manipulated cells. We further review strategies focusing on the stimulation of endogenous cells to support bone repair. Finally, we discuss the major challenges in the treatment of critical-size bone defects and fracture non-unions.
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Affiliation(s)
| | | | - Mauro Alini
- AO Research Institute Davos , Davos , Switzerland
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63
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Sculean A, Chapple ILC, Giannobile WV. Wound models for periodontal and bone regeneration: the role of biologic research. Periodontol 2000 2015; 68:7-20. [PMID: 25867976 PMCID: PMC4441284 DOI: 10.1111/prd.12091] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/05/2015] [Indexed: 12/24/2022]
Abstract
The ultimate goals of periodontal therapy remain the complete regeneration of those periodontal tissues lost to the destructive inflammatory-immune response, or to trauma, with tissues that possess the same structure and function, and the re-establishment of a sustainable health-promoting biofilm from one characterized by dysbiosis. This volume of Periodontology 2000 discusses the multiple facets of a transition from therapeutic empiricism during the late 1960s, toward regenerative therapies, which is founded on a clearer understanding of the biophysiology of normal structure and function. This introductory article provides an overview on the requirements of appropriate in vitro laboratory models (e.g. cell culture), of preclinical (i.e. animal) models and of human studies for periodontal wound and bone repair. Laboratory studies may provide valuable fundamental insights into basic mechanisms involved in wound repair and regeneration but also suffer from a unidimensional and simplistic approach that does not account for the complexities of the in vivo situation, in which multiple cell types and interactions all contribute to definitive outcomes. Therefore, such laboratory studies require validatory research, employing preclinical models specifically designed to demonstrate proof-of-concept efficacy, preliminary safety and adaptation to human disease scenarios. Small animal models provide the most economic and logistically feasible preliminary approaches but the outcomes do not necessarily translate to larger animal or human models. The advantages and limitations of all periodontal-regeneration models need to be carefully considered when planning investigations to ensure that the optimal design is adopted to answer the specific research question posed. Future challenges lie in the areas of stem cell research, scaffold designs, cell delivery and choice of growth factors, along with research to ensure appropriate gingival coverage in order to prevent gingival recession during the healing phase.
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64
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Gupta A, Main BJ, Taylor BL, Gupta M, Whitworth CA, Cady C, Freeman JW, El-Amin SF. In vitro evaluation of three-dimensional single-walled carbon nanotube composites for bone tissue engineering. J Biomed Mater Res A 2014; 102:4118-26. [PMID: 24443220 DOI: 10.1002/jbm.a.35088] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/16/2014] [Accepted: 01/17/2014] [Indexed: 11/09/2022]
Abstract
The purpose of this study was to develop three-dimensional single-walled carbon nanotube composites (SWCNT/PLAGA) using 10-mg single-walled carbon nanotubes (SWCNT) for bone regeneration and to determine the mechanical strength of the composites, and to evaluate the interaction of MC3T3-E1 cells via cell adhesion, growth, survival, proliferation, and gene expression. PLAGA (polylactic-co-glycolic acid) and SWCNT/PLAGA microspheres and composites were fabricated, characterized, and mechanical testing was performed. MC3T3-E1 cells were seeded and cell adhesion/morphology, growth/survival, proliferation, and gene expression analysis were performed to evaluate biocompatibility. Imaging studies demonstrated microspheres with uniform shape and smooth surfaces, and uniform incorporation of SWCNT into PLAGA matrix. The microspheres bonded in a random packing manner while maintaining spacing, thus resembling trabeculae of cancellous bone. Addition of SWCNT led to greater compressive modulus and ultimate compressive strength. Imaging studies revealed that MC3T3-E1 cells adhered, grew/survived, and exhibited normal, nonstressed morphology on the composites. SWCNT/PLAGA composites exhibited higher cell proliferation rate and gene expression compared with PLAGA. These results demonstrate the potential of SWCNT/PLAGA composites for musculoskeletal regeneration, for bone tissue engineering, and are promising for orthopedic applications as they possess the combined effect of increased mechanical strength, cell proliferation, and gene expression.
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Affiliation(s)
- Ashim Gupta
- Department of Medical Microbiology Immunology & Cell Biology, Southern Illinois University, School of Medicine, Springfield, Illinois
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Controlled release of granulocyte colony-stimulating factor enhances osteoconductive and biodegradable properties of Beta-tricalcium phosphate in a rat calvarial defect model. Int J Biomater 2014; 2014:134521. [PMID: 24829581 PMCID: PMC4009298 DOI: 10.1155/2014/134521] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 11/27/2013] [Accepted: 11/27/2013] [Indexed: 12/12/2022] Open
Abstract
Autologous bone grafts remain the gold standard for the treatment of congenital craniofacial disorders; however, there are potential problems including donor site morbidity and limitations to the amount of bone that can be harvested. Recent studies suggest that granulocyte colony-stimulating factor (G-CSF) promotes fracture healing or osteogenesis. The purpose of the present study was to investigate whether topically applied G-CSF can stimulate the osteoconductive properties of beta-tricalcium phosphate (β-TCP) in a rat calvarial defect model. A total of 27 calvarial defects 5 mm in diameter were randomly divided into nine groups, which were treated with various combinations of a β-TCP disc and G-CSF in solution form or controlled release system using gelatin hydrogel. Histologic and histomorphometric analyses were performed at eight weeks postoperatively. The controlled release of low-dose (1 μg and 5 μg) G-CSF significantly enhanced new bone formation when combined with a β-TCP disc. Moreover, administration of 5 μg G-CSF using a controlled release system significantly promoted the biodegradable properties of β-TCP. In conclusion, the controlled release of 5 μg G-CSF significantly enhanced the osteoconductive and biodegradable properties of β-TCP. The combination of G-CSF slow-release and β-TCP is a novel and promising approach for treating pediatric craniofacial bone defects.
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Guida alla scelta di un biomateriale per la preservazione alveolare: l’importanza dei fattori biologici di rimodellamento. DENTAL CADMOS 2014. [DOI: 10.1016/s0011-8524(14)70144-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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67
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Park CH, Rios HF, Taut AD, Padial-Molina M, Flanagan CL, Pilipchuk SP, Hollister SJ, Giannobile WV. Image-based, fiber guiding scaffolds: a platform for regenerating tissue interfaces. Tissue Eng Part C Methods 2013; 20:533-42. [PMID: 24188695 DOI: 10.1089/ten.tec.2013.0619] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In the oral and craniofacial complex, tooth loss is the most commonly acquired disfiguring injury. Among the most formidable challenges of reconstructing tooth-supporting osseous defects in the oral cavity is the regeneration of functional multi-tissue complexes involving bone, ligament, and tooth cementum. Furthermore, periodontal multi-tissue engineering with spatiotemporal orientation of the periodontal ligament (PDL) remains the most challenging obstacle for restoration of physiological loading and homeostasis. We report on the ability of a hybrid computer-designed scaffold--developed utilizing computed tomography--to predictably facilitate the regeneration and integration of dental supporting tissues. Here, we provide the protocol for rapid prototyping, manufacture, surgical implantation, and evaluation of dual-architecture scaffolds for controlling fiber orientation and facilitating morphogenesis of bone-ligament complexes. In contrast to conventional single-system methods of fibrous tissue formation, our protocol supports rigorous control of multi-compartmental scaffold architecture using computational scaffold design and manufacturing by 3D printing, as well as the evaluation of newly regenerated tissue physiology for clinical implementation.
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Affiliation(s)
- Chan Ho Park
- 1 Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan , Ann Arbor, Michigan
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68
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Eweida AM, Nabawi AS, Abouarab M, Kayed M, Elhammady H, Etaby A, Khalil MR, Shawky MS, Kneser U, Horch RE, Nagy N, Marei MK. Enhancing mandibular bone regeneration and perfusion via axial vascularization of scaffolds. Clin Oral Investig 2013; 18:1671-8. [DOI: 10.1007/s00784-013-1143-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Accepted: 11/07/2013] [Indexed: 12/23/2022]
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69
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de Paula Reis MV, Moura CCG, Soares PBF, Leoni GB, Souza-Neto MD, Barbosa DZ, Soares CJ. Histologic and micro-computed tomographic analyses of replanted teeth stored in different kind of media. J Endod 2013; 40:665-9. [PMID: 24767561 DOI: 10.1016/j.joen.2013.09.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 09/17/2013] [Accepted: 09/17/2013] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Coconut water (CW) and soy milk (SM) have been proposed as storage media for avulsed teeth because of their nutrients that preserve cell viability. The present study investigated the periodontal healing process of dog teeth replanted after storage in CW, SM, and whole milk (WM) using micro-computed tomographic (μCT) and histologic analyses compared with immediate tooth replantation. METHODS Forty roots of 10 adult beagle dogs were extracted and subjected to the following protocols: immediate replantation after extraction (control), stored in CW with an adjusted pH, and SM and WM for 50 minutes before replantation. The animals were euthanized 28 days postoperatively, and the obtained specimens were scanned using a μCT scanner and subjected to routine processing for histometric analyses under an optical microscope. RESULTS CW and SM performed similarly to WM; however, SM showed significantly higher ankylosis than the control group. CONCLUSIONS Additionally, this study showed that the combined use of histologic analysis and μCT is a promising method to better identify tooth resorption and the repair process and to evaluate the total extension of the periodontium. CW as a storage medium is a promising transport media for avulsed teeth.
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Affiliation(s)
- Manuella Verdinelli de Paula Reis
- Biomechanics Group, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Camilla Christian Gomes Moura
- Biomechanics Group, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Priscilla Barbosa Ferreira Soares
- Biomechanics Group, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Graziela Bianchi Leoni
- Oral and Maxillofacial Surgery and Implantology Department, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Manoel Damião Souza-Neto
- Oral and Maxillofacial Surgery and Implantology Department, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil
| | - Darceny Zanetta Barbosa
- Department of Restorative Dentistry, Faculty of Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - Carlos José Soares
- Biomechanics Group, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia, Uberlândia, Brazil.
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Shimauchi H, Nemoto E, Ishihata H, Shimomura M. Possible functional scaffolds for periodontal regeneration. JAPANESE DENTAL SCIENCE REVIEW 2013. [DOI: 10.1016/j.jdsr.2013.05.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Prevention of inflammation-mediated bone loss in murine and canine periodontal disease via recruitment of regulatory lymphocytes. Proc Natl Acad Sci U S A 2013; 110:18525-30. [PMID: 24167272 DOI: 10.1073/pnas.1302829110] [Citation(s) in RCA: 145] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The hallmark of periodontal disease is the progressive destruction of gingival soft tissue and alveolar bone, which is initiated by inflammation in response to an invasive and persistent bacterial insult. In recent years, it has become apparent that this tissue destruction is associated with a decrease in local regulatory processes, including a decrease of forkhead box P3-expressing regulatory lymphocytes. Accordingly, we developed a controlled release system capable of generating a steady release of a known chemoattractant for regulatory lymphocytes, C-C motif chemokine ligand 22 (CCL22), composed of a degradable polymer with a proven track record of clinical translation, poly(lactic-co-glycolic) acid. We have previously shown that this sustained presentation of CCL22 from a point source effectively recruits regulatory T cells (Tregs) to the site of injection. Following administration of the Treg-recruiting formulation to the gingivae in murine experimental periodontitis, we observed increases in hallmark Treg-associated anti-inflammatory molecules, a decrease of proinflammatory cytokines, and a marked reduction in alveolar bone resorption. Furthermore, application of the Treg-recruiting formulation (fabricated with human CCL22) in ligature-induced periodontitis in beagle dogs leads to reduced clinical measures of inflammation and less alveolar bone loss under severe inflammatory conditions in the presence of a diverse periodontopathogen milieu.
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Yang H, Gao LN, An Y, Hu CH, Jin F, Zhou J, Jin Y, Chen FM. Comparison of mesenchymal stem cells derived from gingival tissue and periodontal ligament in different incubation conditions. Biomaterials 2013; 34:7033-47. [DOI: 10.1016/j.biomaterials.2013.05.025] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Accepted: 05/16/2013] [Indexed: 12/25/2022]
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74
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Han J, Menicanin D, Marino V, Ge S, Mrozik K, Gronthos S, Bartold PM. Assessment of the regenerative potential of allogeneic periodontal ligament stem cells in a rodent periodontal defect model. J Periodontal Res 2013; 49:333-45. [DOI: 10.1111/jre.12111] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/10/2013] [Indexed: 12/21/2022]
Affiliation(s)
- J. Han
- Colgate Australian Clinical Dental Research Centre; School of Dentistry; University of Adelaide; Adelaide SA Australia
| | - D. Menicanin
- Colgate Australian Clinical Dental Research Centre; School of Dentistry; University of Adelaide; Adelaide SA Australia
| | - V. Marino
- Colgate Australian Clinical Dental Research Centre; School of Dentistry; University of Adelaide; Adelaide SA Australia
| | - S. Ge
- Department of Periodontology; School of Stomatology; Shandong University; Jinan China
| | - K. Mrozik
- Colgate Australian Clinical Dental Research Centre; School of Dentistry; University of Adelaide; Adelaide SA Australia
| | - S. Gronthos
- Mesenchymal Stem Cell Laboratory; School of Medical Sciences; University of Adelaide; Adelaide SA Australia
| | - P. M. Bartold
- Colgate Australian Clinical Dental Research Centre; School of Dentistry; University of Adelaide; Adelaide SA Australia
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Bhattarai G, Lee YH, Lee MH, Yi HK. Gene delivery of c-myb increases bone formation surrounding oral implants. J Dent Res 2013; 92:840-5. [PMID: 23838059 DOI: 10.1177/0022034513497753] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Bone regeneration around titanium (Ti) implants is a relatively slow process. The c-myb transcription factor has been associated with high proliferation and differentiation rates in bone. This study analyzed whether c-myb can enhance new bone surrounding the implant. In vitro overexpressed chitosan-gold nanoparticles conjugated with plasmid DNA/c-myb (Ch-GNPs/c-myb)-coated Ti surfaces were associated with enhanced expression of the osteogenic molecules osteopontin (OPN), runt-related transcription factor 2 (RUNX-2), and bone morphogenetic proteins (BMP2/7) in MC-3T3E1 osteoblast cells. Further, to determine its in vivo effect, we inserted Ch-GNPs/c-myb-coated Ti implants into rat mandibles. One and 4 wks post-implantation, mandibles were examined by microcomputed tomography, immunohistochemistry, and hematoxylin & eosin staining. The microcomputed tomography analysis demonstrated that c-myb overexpression increased the density and volume of newly formed bone surrounding the implants, compared with those in controls (p < .05). Further, c-myb increased the number of cells expressing BMP2/7 and aided in the increase of new bone (p < .05). These results support the view that c-myb overexpression accelerates new bone surrounding implants and can serve as a potent molecule in promoting tissue regeneration around dental implants. The recipient rat used in this system provides an excellent in vivo model for studies of bone regeneration.
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Affiliation(s)
- G Bhattarai
- Department of Oral Biochemistry, BK21 program, School of Dentistry, Chonbuk National University, Jeonju, Korea
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Vajgel A, Mardas N, Farias BC, Petrie A, Cimões R, Donos N. A systematic review on the critical size defect model. Clin Oral Implants Res 2013; 25:879-93. [DOI: 10.1111/clr.12194] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2013] [Indexed: 01/01/2023]
Affiliation(s)
- André Vajgel
- Oral and Maxillofacial Department; University of Pernambuco (FOP/UPE); Recife Brazil
- CAPES Foundation; Ministry of Education of Brazil; Brasília Brazil
- Periodontology Unit; UCL Eastman Dental Institute; London UK
| | - Nikos Mardas
- Periodontology Unit; UCL Eastman Dental Institute; London UK
| | - Bruna Carvalho Farias
- CAPES Foundation; Ministry of Education of Brazil; Brasília Brazil
- Periodontology Unit; UCL Eastman Dental Institute; London UK
- Postgraduate Department; Federal University of Pernambuco (UFPE); Recife Brazil
| | - Aviva Petrie
- Biostatistics Unit; UCL Eastman Dental Institute; London UK
| | - Renata Cimões
- Department of Prosthesis and Oral and Facial Surgery; Federal University of Pernambuco (UFPE); Recife Brazil
| | - Nikolaos Donos
- Periodontology Unit; UCL Eastman Dental Institute; London UK
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Yu N, Oortgiesen DAW, Bronckers ALJJ, Yang F, Walboomers XF, Jansen JA. Enhanced periodontal tissue regeneration by periodontal cell implantation. J Clin Periodontol 2013; 40:698-706. [PMID: 23675871 DOI: 10.1111/jcpe.12113] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/08/2013] [Indexed: 12/14/2022]
Abstract
AIM Due to a lack of regenerative potential, current treatments for periodontal defects do not always provide satisfactory clinical results. Previously, the implantation of a biomaterial scaffold-cell construct has been suggested as a clinically achievable approach. In this study, it was aimed to investigate the contribution of implanted periodontal ligament (PDL) cells to periodontal tissue regeneration. MATERIALS & METHODS Gelatin sponges were seeded with green fluorescent protein (GFP) transfected PDL or gingival fibroblasts (GF) cells, and implanted into a surgically created rat intrabony periodontal defect model. After six weeks, decalcified maxillae were used for histomorphometrical and immunohistochemical analyses. RESULTS After six weeks, animals that had received the PDL cells exhibited significantly more functional bone and ligament. Furthermore, there were remarkable differences in the distribution of the transplanted cells. Periodontal ligament cells were always located directly lining the newly regenerated areas. In contrast, GF cells dispersed over the whole defect area, and did not provide a favourable effect on the regeneration of the periodontal tissues. CONCLUSION We concluded that PDL cells transplanted into a periodontal defect survive and favour regeneration of periodontium, possibly in a paracrine manner.
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Affiliation(s)
- Na Yu
- Department of Biomaterials, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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78
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Inukai T, Katagiri W, Yoshimi R, Osugi M, Kawai T, Hibi H, Ueda M. Novel application of stem cell-derived factors for periodontal regeneration. Biochem Biophys Res Commun 2012. [PMID: 23206704 DOI: 10.1016/j.bbrc.2012.11.074] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The effect of conditioned medium from cultured mesenchymal stem cells (MSC-CM) on periodontal regeneration was evaluated. In vitro, MSC-CM stimulated migration and proliferation of dog MSCs (dMSCs) and dog periodontal ligament cells (dPDLCs). Cytokines such as insulin-like growth factor, vascular endothelial growth factor, transforming growth factor-β1, and hepatocyte growth factor were detected in MSC-CM. In vivo, one-wall critical-size, intrabony periodontal defects were surgically created in the mandible of dogs. Dogs with these defects were divided into three groups that received MSC-CM, PBS, or no implants. Absorbable atelo-collagen sponges (TERUPLUG®) were used as a scaffold material. Based on radiographic and histological observation 4 weeks after transplantation, the defect sites in the MSC-CM group displayed significantly greater alveolar bone and cementum regeneration than the other groups. These findings suggest that MSC-CM enhanced periodontal regeneration due to multiple cytokines contained in MSC-CM.
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Affiliation(s)
- Takeharu Inukai
- Department of Oral and Maxillofacial Surgery, Nagoya University Graduate School of Medicine, Japan.
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Padial-Molina M, Volk S, Taut A, Giannobile W, Rios H. Periostin is down-regulated during periodontal inflammation. J Dent Res 2012; 91:1078-84. [PMID: 22933606 PMCID: PMC3525130 DOI: 10.1177/0022034512459655] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 07/15/2012] [Accepted: 08/08/2012] [Indexed: 11/16/2022] Open
Abstract
Periostin, a matricellular adapter protein highly expressed by periodontal ligament fibroblasts, is implicated in the maintenance of periodontal integrity, which is compromised during periodontal diseases. The aim of this study was to explore the influence of chronic periodontal inflammation on tissue periostin levels. Periodontal breakdown was induced in a pre-clinical ligature periodontal inflammatory disease model. Periodontal tissue specimens were harvested at baseline, 2 weeks, and 4 weeks and prepared for histologic, immunofluorescence, and micro-CT examination. Statistical analyses were conducted by Kruskal-Wallis, Mann-Whitney, and Spearman's tests. Periostin detection levels were reduced over time in response to the inflammatory process (1 ± 0.05; 0.67 ± 0.03; 0.31 ± 0.02; p < 0.001; baseline, 2, and 4 weeks, respectively). Simultaneously, alveolar bone loss increased from baseline to the 2- and 4-week time-points (0.40 ± 0.02 mm; 1.39 ± 0.08 mm; 1.33 ± 0.15 mm; p < 0.001), which was inversely correlated with the levels of periostin (ρ = -0.545; p < 0.001). In conclusion, periostin PDL tissue levels significantly decrease under chronic inflammatory response and correlate with the detrimental changes to the periodontium over time.
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Affiliation(s)
- M. Padial-Molina
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, 1011 North University Ave., Office 3349, Ann Arbor, MI, 48109-1078, USA
| | - S.L. Volk
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, 1011 North University Ave., Office 3349, Ann Arbor, MI, 48109-1078, USA
| | - A.D. Taut
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, 1011 North University Ave., Office 3349, Ann Arbor, MI, 48109-1078, USA
| | - W.V. Giannobile
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, 1011 North University Ave., Office 3349, Ann Arbor, MI, 48109-1078, USA
- Michigan Center for Oral Health Research, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - H.F. Rios
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, 1011 North University Ave., Office 3349, Ann Arbor, MI, 48109-1078, USA
- Michigan Center for Oral Health Research, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
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Lu H, Xie C, Zhao YM, Chen FM. Translational research and therapeutic applications of stem cell transplantation in periodontal regenerative medicine. Cell Transplant 2012; 22:205-29. [PMID: 23031442 DOI: 10.3727/096368912x656171] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Stem cells have received a great deal of interest from the research community as potential therapeutic "tools" for a variety of chronic debilitating diseases that lack clinically effective therapies. Stem cells are also of interest for the regeneration of tooth-supporting tissues that have been lost to periodontal disease. Indeed, substantial data have demonstrated that the exogenous administration of stem cells or their derivatives in preclinical animal models of periodontal defects can restore damaged tissues to their original form and function. As we discuss here, however, considerable hurdles must be overcome before these findings can be responsibly translated to novel clinical therapies. Generally, the application of stem cells for periodontal therapy in clinics will not be realized until the best cell(s) to use, the optimal dose, and an effective mode of administration are identified. In particular, we need to better understand the mechanisms of action of stem cells after transplantation in the periodontium and to learn how to preciously control stem cell fates in the pathological environment around a tooth. From a translational perspective, we outline the challenges that may vary across preclinical models for the evaluation of stem cell therapy in situations that require periodontal reconstruction and the safety issues that are related to clinical applications of human stem cells. Although clinical trials that use autologous periodontal ligament stem cells have been approved and have already been initiated, proper consideration of the technical, safety, and regulatory concerns may facilitate, rather than inhibit, the clinical translation of new therapies.
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Affiliation(s)
- Hong Lu
- Department of Periodontology and Oral Medicine, School of Stomatology, Fourth Military Medical University, Xi'an 710032, People's Republic of China
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Abstract
In humans, microbially induced inflammatory periodontal diseases are the primary initiators that disrupt the functional and structural integrity of the periodontium (i.e., the alveolar bone, the periodontal ligament, and the cementum). The reestablishment of its original structure, properties, and function constitutes a significant challenge in the development of new therapies to regenerate tooth-supporting defects. Preclinical models represent an important in vivo tool to critically evaluate and analyze the key aspects of novel regenerative therapies, including (1) safety, (2) effectiveness, (3) practicality, and (4) functional and structural stability over time. Therefore, these models provide foundational data that supports the clinical validation and the development of novel innovative regenerative periodontal technologies. Steps are provided on the use of the root fenestration animal model for the proper evaluation of periodontal outcome measures using the following parameters: descriptive histology, histomorphometry, immunostaining techniques, three-dimensional imaging, electron microscopy, gene expression analyses, and safety assessments. These methods will prepare investigators and assist them in identifying the key end points that can then be adapted to later stage human clinical trials.
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Wang WJ, Zhao YM, Lin BC, Yang J, Ge LH. Identification of multipotent stem cells from adult dog periodontal ligament. Eur J Oral Sci 2012; 120:303-10. [PMID: 22813220 DOI: 10.1111/j.1600-0722.2012.00975.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Wen-Jun Wang
- Department of Pediatric Dentistry; Peking University School and Hospital of Stomatology; Beijing China
| | - Yu-Ming Zhao
- Department of Pediatric Dentistry; Peking University School and Hospital of Stomatology; Beijing China
| | - Bi-Chen Lin
- Department of Pediatric Dentistry; Peking University School and Hospital of Stomatology; Beijing China
| | - Jie Yang
- Department of Pediatric Dentistry; Peking University School and Hospital of Stomatology; Beijing China
| | - Li-Hong Ge
- Department of Pediatric Dentistry; Peking University School and Hospital of Stomatology; Beijing China
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83
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Oortgiesen DAW, Plachokova AS, Geenen C, Meijer GJ, Walboomers XF, van den Beucken JJJP, Jansen JA. Alkaline phosphatase immobilization onto Bio-Gide®and Bio-Oss®for periodontal and bone regeneration. J Clin Periodontol 2012; 39:546-55. [DOI: 10.1111/j.1600-051x.2012.01877.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/11/2012] [Indexed: 11/30/2022]
Affiliation(s)
- Daniël A. W. Oortgiesen
- Department of Biomaterials; Radboud University Nijmegen Medical Center; Nijmegen; The Netherlands
| | - Adelina S. Plachokova
- Department of Implantology and Periodontology; Radboud University Nijmegen Medical Center; Nijmegen; The Netherlands
| | - Claudia Geenen
- Department of Implantology and Periodontology; Radboud University Nijmegen Medical Center; Nijmegen; The Netherlands
| | - Gert J. Meijer
- Department of Implantology and Periodontology; Radboud University Nijmegen Medical Center; Nijmegen; The Netherlands
| | - X. Frank Walboomers
- Department of Biomaterials; Radboud University Nijmegen Medical Center; Nijmegen; The Netherlands
| | | | - John A. Jansen
- Department of Biomaterials; Radboud University Nijmegen Medical Center; Nijmegen; The Netherlands
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84
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Kuchler U, Luvizuto ER, Muñoz F, Hofbauer J, Watzek G, Gruber R. Bone healing around titanium implants in two rat colitis models. Clin Oral Implants Res 2012; 24:224-9. [PMID: 22509782 DOI: 10.1111/j.1600-0501.2012.02454.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/25/2012] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Crohn's disease is a chronic inflammatory process that has recently been associated with a higher risk of early implant failure. Herein we provide information on the impact of colitis on peri-implant bone formation using preclinical models of chemically induced colitis. METHODS Colitis was induced by intrarectal instillation of 2,4,6-trinitro-benzene-sulfonic-acid (TNBS). Colitis was also induced by feeding rats dextran-sodium-sulfate (DSS) in drinking water. One week after disease induction, titanium miniscrews were inserted into the tibia. Four weeks after implantation, peri-implant bone volume per tissue volume (BV/TV) and bone-to-implant contacts (BIC) were determined by histomorphometric analysis. RESULTS Cortical histomorphometric parameters were similar in the control (n = 10), DSS (n = 10) and TNBS (n = 8) groups. Cortical BV/TV was 92.2 ± 3.7%, 92.0 ± 3.0% and 92.6 ± 2.7%. Cortical BIC was 81.3 ± 8.8%, 83.2 ± 8.4% and 84.0 ± 7.0%, respectively. No significant differences were observed when comparing the medullary BV/TV and BIC (19.5 ± 6.4%, 16.2 ± 5.6% and 15.4 ± 9.0%) and (48.8 ± 12.9%, 49.2 ± 6.2 and 41.9 ± 11.7%), respectively. Successful induction of colitis was confirmed by loss of body weight and colon morphology. CONCLUSIONS The results suggest bone regeneration around implants is not impaired in chemically induced colitis models. Considering that Crohn's disease can affect any part of the gastrointestinal tract including the mouth, our model only partially reflects the clinical situation.
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Affiliation(s)
- Ulrike Kuchler
- Department of Oral Surgery, Medical University of Vienna, Vienna, Austria
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85
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Yuan Z, Nie H, Wang S, Lee CH, Li A, Fu SY, Zhou H, Chen L, Mao JJ. Biomaterial selection for tooth regeneration. TISSUE ENGINEERING PART B-REVIEWS 2012; 17:373-88. [PMID: 21699433 DOI: 10.1089/ten.teb.2011.0041] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Biomaterials are native or synthetic polymers that act as carriers for drug delivery or scaffolds for tissue regeneration. When implanted in vivo, biomaterials should be nontoxic and exert intended functions. For tooth regeneration, biomaterials have primarily served as a scaffold for (1) transplanted stem cells and/or (2) recruitment of endogenous stem cells. This article critically synthesizes our knowledge of biomaterial use in tooth regeneration, including the selection of native and/or synthetic polymers, three-dimensional scaffold fabrication, stem cell transplantation, and stem cell homing. A tooth is a complex biological organ. Tooth loss represents the most common organ failure. Tooth regeneration encompasses not only regrowth of an entire tooth as an organ, but also biological restoration of individual components of the tooth including enamel, dentin, cementum, or dental pulp. Regeneration of tooth root represents perhaps more near-term opportunities than the regeneration of the whole tooth. In the adult, a tooth owes its biological vitality, arguably more, to the root than the crown. Biomaterials are indispensible for the regeneration of tooth root, tooth crown, dental pulp, or an entire tooth.
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Affiliation(s)
- Zhenglin Yuan
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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86
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Stadlinger B, Pourmand P, Locher MC, Schulz MC. Systematic review of animal models for the study of implant integration, assessing the influence of material, surface and design. J Clin Periodontol 2012; 39 Suppl 12:28-36. [DOI: 10.1111/j.1600-051x.2011.01835.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bernd Stadlinger
- Clinic of Cranio-Maxillofacial and Oral Surgery; University of Zurich; Zurich; Switzerland
| | - Pedram Pourmand
- Clinic of Cranio-Maxillofacial and Oral Surgery; University of Zurich; Zurich; Switzerland
| | - Michael C. Locher
- Clinic of Cranio-Maxillofacial and Oral Surgery; University of Zurich; Zurich; Switzerland
| | - Matthias C. Schulz
- Department of Oral & Maxillofacial Surgery; University Hospital Dresden; Dresden; Germany
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87
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Chen FM, Zhao YM, Jin Y, Shi S. Prospects for translational regenerative medicine. Biotechnol Adv 2011; 30:658-72. [PMID: 22138411 DOI: 10.1016/j.biotechadv.2011.11.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 11/12/2011] [Accepted: 11/15/2011] [Indexed: 02/06/2023]
Abstract
Translational medicine is an evolutional concept that encompasses the rapid translation of basic research for use in clinical disease diagnosis, prevention and treatment. It follows the idea "from bench to bedside and back", and hence relies on cooperation between laboratory research and clinical care. In the past decade, translational medicine has received unprecedented attention from scientists and clinicians and its fundamental principles have penetrated throughout biomedicine, offering a sign post that guides modern medical research toward a patient-centered focus. Translational regenerative medicine is still in its infancy, and significant basic research investment has not yet achieved satisfactory clinical outcomes for patients. In particular, there are many challenges associated with the use of cell- and tissue-based products for clinical therapies. This review summarizes the transformation and global progress in translational medicine over the past decade. The current obstacles and opportunities in translational regenerative medicine are outlined in the context of stem cell therapy and tissue engineering for the safe and effective regeneration of functional tissue. This review highlights the requirement for multi-disciplinary and inter-disciplinary cooperation to ensure the development of the best possible regenerative therapies within the shortest timeframe possible for the greatest patient benefit.
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Affiliation(s)
- Fa-Ming Chen
- Department of Periodontology & Oral Medicine, School of Stomatology, Fourth Military Medical University, Xi'an 710032, Shaanxi, PR China.
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88
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Faggion CM, Giannakopoulos NN, Listl S. Risk of bias of animal studies on regenerative procedures for periodontal and peri-implant bone defects - a systematic review. J Clin Periodontol 2011; 38:1154-60. [PMID: 22092584 DOI: 10.1111/j.1600-051x.2011.01783.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/23/2011] [Indexed: 12/16/2022]
Abstract
OBJECTIVES (1) To assess the risk of bias of studies in which animal models were used for investigating regenerative therapies for periodontal and peri-implant defects. (2) To investigate changes in risk of bias by comparing samples drawn from two different publication periods. MATERIAL & METHODS We searched the PubMed and LILACS electronic databases, independently and in duplicate, for randomized and controlled trials published from 1998 to 2000 and from 2008 to 2010. Hand searching included search of 10 dental journals, in the issues published between August 2008 and August 2010. Studies on non-human primates and canines were included. We assessed independently and in triplicate the risk of bias with reference to a six-item checklist based on the Cochrane Collaboration's tool for assessing the risk of bias and information about formal sample size calculation. RESULTS One hundred and seven studies were included in the review. Checklist items were poorly reported in the studies selected, and therefore for most of the studies, the risk of bias was unclear. CONCLUSION As a result of the unclear risk of bias of animal studies in periodontal and peri-implant treatments, it is difficult to determine the accuracy of treatment effect estimates. There is a need for standardization of reporting procedures on animal experiments.
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Affiliation(s)
- Clovis Mariano Faggion
- Department of Prosthodontics, Dental School, University of Heidelberg, Heidelberg, Germany.
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89
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Cozin M, Pinker BM, Solemani K, Zuniga JM, Dadaian SC, Cremers S, Landesberg R, Raghavan S. Novel therapy to reverse the cellular effects of bisphosphonates on primary human oral fibroblasts. J Oral Maxillofac Surg 2011; 69:2564-78. [PMID: 21807448 DOI: 10.1016/j.joms.2011.03.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Revised: 02/21/2011] [Accepted: 03/01/2011] [Indexed: 01/03/2023]
Abstract
PURPOSE Osteonecrosis of the jaws (ONJ) is a clinical condition that is characterized by a nonhealing breach in the oral mucosa resulting in exposure of bone and has been increasingly reported in patients receiving bisphosphonate (BP) therapy. Although the pathogenesis and natural history of ONJ remain ill-defined, it appears that the oral soft tissues play a critical role in the development of this condition. We examined the effects of the nitrogen-containing BPs pamidronate and zoledronate on primary human gingival fibroblasts. MATERIALS AND METHODS Primary gingival fibroblasts were exposed to clinically relevant doses of pamidronate and zoledronate. Cellular proliferation was measured with an MTS/PMS reagent-based kit (Promega, Madison, WI), scratch wound assays were performed to measure cellular migration, and apoptosis was measured by use of terminal deoxynucleotidyl transferase-mediated dUTP-FITC end labeling and caspase assays. The BP-exposed cells were treated with 10-ng/mL recombinant human platelet-derived growth factor BB (rhPDGF-BB) and 50-μmol/L geranylgeraniol (GGOH). RESULTS Gingival fibroblasts are significantly more sensitive to inhibition of proliferation by zoledronate compared with pamidronate. Exposure of these cells to pamidronate but not zoledronate resulted in an increase in cellular apoptosis. Furthermore, exposure of gingival fibroblasts to pamidronate or zoledronate resulted in a decrease in cellular migration. We show that these defects are due to a loss of cell-substratum adhesion and a reduction of F-actin bundles. Finally, we show that the addition of rhPDGF-BB and GGOH in vitro is able to partially rescue the cell proliferation, migration, and adhesion defects. CONCLUSION The cytotoxic effects of BPs on oral fibroblasts and their significant reversal by the addition of GGOH and rhPDGF-BB provide both the potential mechanism and treatment options for ONJ.
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Affiliation(s)
- Matthew Cozin
- College of Dental Medicine, Columbia University, New York, NY 10032, USA
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90
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Zhang ZG, Li ZH, Mao XZ, Wang WC. Advances in bone repair with nanobiomaterials: mini-review. Cytotechnology 2011; 63:437-43. [PMID: 21748262 DOI: 10.1007/s10616-011-9367-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 06/10/2011] [Indexed: 01/18/2023] Open
Abstract
Nanotechnology has emerged to be one of the most powerful engineering approaches in the past half a century. Nanotechnology brought nanomaterials for biomedical use with diverse applications. In the present manuscript we summarize the recent progress in adopting nanobiomaterials for bone healing and repair approaches. We first discuss the use of nanophase surface modification in manipulating metals and ceramics for bone implantation, and then the use of polymers as nanofiber scaffolds in bone repair. Finally we briefly present the potential use of the nanoparticle delivery system as adjunct system in promoting bone regeneration following fracture.
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Affiliation(s)
- Zhao-Gui Zhang
- Department of Orthopaedics, The Second Xiangya Hospital of Central South University, Middle Ren-Min Road No. 139, Changsha, Hunan, 410011, China
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91
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Foschi F, Conserva E, Pera P, Canciani B, Cancedda R, Mastrogiacomo M. Graft materials and bone marrow stromal cells in bone tissue engineering. J Biomater Appl 2011; 26:1035-49. [PMID: 21363873 DOI: 10.1177/0885328210393046] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Bone augmentation procedures rely on osteogenic/osteoconductive properties of bone graft material (BGM). A further improvement is represented by use of autologous bone marrow stromal cells (BMSC), expanded in vitro and seeded on BGM before implantation in the bone defect. The effect of different BGMs on BMSC osteogenic differentiation was evaluated. BMSC were cultured in vitro in the presence of different BGM (natural, synthetic, and mixed origins). Cellular morphology was analyzed with scanning electron microscopy. The capability of BMSC to differentiate was determined in vitro by alkaline phosphatase gene expression and enzyme activity at different time points (7, 14, and 28 days) and in vivo by ectopic bone formation of implanted tissue constructs in an immunodeficient murine model. BGM supports the cell adhesion and osteogenic differentiation of BMSC developing a useful tool in the bone tissue engineering.
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Affiliation(s)
- Federico Foschi
- Istituto Nazionale per la Ricerca sul Cancro, Biologia e Genetica dell'Università di Genova, Genova, Italy
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Zecha PJ, Schortinghuis J, van der Wal JE, Nagursky H, van den Broek KC, Sauerbier S, Vissink A, Raghoebar GM. Applicability of equine hydroxyapatite collagen (eHAC) bone blocks for lateral augmentation of the alveolar crest. A histological and histomorphometric analysis in rats. Int J Oral Maxillofac Surg 2011; 40:533-42. [PMID: 21349689 DOI: 10.1016/j.ijom.2011.01.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2010] [Revised: 10/26/2010] [Accepted: 01/12/2011] [Indexed: 11/19/2022]
Abstract
This study assessed the mechanical characteristics, biocompatibility and osteoconductive properties of an equine hydroxyapatite collagen (eHAC) bone block when applied as a bone substitute for lateral augmentation of rat mandible. 96 rats underwent lateral augmentation of the mandible, using two substitute bone blocks (eHAC or Bio-Oss spongiosa) or autologous bone grafts. Signs of inflammation, amount of bone formation and ingrowth of bone into the bone blocks were assessed at 1 and 3 months. eHAC blocks were mechanically rigid and could be fixed firmly and easily. Bio-Oss spongiosa blocks were brittle and fixation was difficult. eHAC and Bio-Oss spongiosa blocks were biocompatible and induced few or no signs of inflammation. Inflammation prevalence between the groups was not statistically different. Bone formation and bone growth into the blocks was significantly higher in eHAC than Bio-Oss spongiosa blocks, but lower than in autologous bone grafts (after 1 and 3 months). Regression analysis showed that the autologous bone graft predicted new bone formation at both time points. The eHAC block was only a predictor at 1 month; a trend was found at 3 months. The application of biodegradable membranes was not related to more bone ingrowth.
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Affiliation(s)
- P J Zecha
- Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, The Netherlands.
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93
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DuRaine G, Hu J, Athanasiou K. Bioengineering in the oral cavity: insights from articular cartilage tissue engineering. Int J Oral Maxillofac Implants 2011; 26 Suppl:11-24. [PMID: 21464997 PMCID: PMC3164493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
Cartilage failure in diarthrodial joints results in pain and a reduction in quality of life. The goal of cartilage tissue engineering is to replace or regenerate these mechanically loaded tissues to restore function to the joint. Recent advances in the authors' laboratory have resulted in the production of cartilage and fibrocartilage with clinically relevant properties. A review of salient results will constitute the bulk of this manuscript. After providing a brief background of the clinical problem, this review will highlight several specific tissue engineering tools. The approaches used to produce mechanically functional cartilage through tissue engineering have several parallels to the problems faced in osseointegration, eg, the need for mechanically appropriate tissues at the implantation site. The discussion that follows will focus on how approaches developed in identifying alternative cell sources and various exogenous stimuli for producing new cartilage may be applicable to osseointegration.
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Affiliation(s)
| | | | - Kyriacos Athanasiou
- Address all correspondence to Kyriacos A. Athanasiou, PhD, PE, Department of Biomedical Engineering, University of California, Davis, One Shields Avenue, Davis, CA 95616; Telephone: (530) 754-6645; Fax: (530) 754-5739;
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94
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Chen FM, Zhang J, Zhang M, An Y, Chen F, Wu ZF. A review on endogenous regenerative technology in periodontal regenerative medicine. Biomaterials 2010; 31:7892-927. [PMID: 20684986 DOI: 10.1016/j.biomaterials.2010.07.019] [Citation(s) in RCA: 235] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Accepted: 07/04/2010] [Indexed: 12/17/2022]
Abstract
Periodontitis is a globally prevalent inflammatory disease that causes the destruction of the tooth-supporting apparatus and potentially leads to tooth loss. Currently, the methods to reconstitute lost periodontal structures (i.e. alveolar bone, periodontal ligament, and root cementum) have relied on conventional mechanical, anti-infective modalities followed by a range of regenerative procedures such as guided tissue regeneration, the use of bone replacement grafts and exogenous growth factors (GFs), and recently developed tissue engineering technologies. However, all current or emerging paradigms have either been shown to have limited and variable outcomes or have yet to be developed for clinical use. To accelerate clinical translation, there is an ongoing need to develop therapeutics based on endogenous regenerative technology (ERT), which can stimulate latent self-repair mechanisms in patients and harness the host's innate capacity for regeneration. ERT in periodontics applies the patient's own regenerative 'tools', i.e. patient-derived GFs and fibrin scaffolds, sometimes in association with commercialized products (e.g. Emdogain and Bio-Oss), to create a material niche in an injured site where the progenitor/stem cells from neighboring tissues can be recruited for in situ periodontal regeneration. The choice of materials and the design of implantable devices influence therapeutic potential and the number and invasiveness of the associated clinical procedures. The interplay and optimization of each niche component involved in ERT are particularly important to comprehend how to make the desired cell response safe and effective for therapeutics. In this review, the emerging opportunities and challenges of ERT that avoid the ex vivo culture of autologous cells are addressed in the context of new approaches for engineering or regeneration of functional periodontal tissues by exploiting the use of platelet-rich products and its associated formulations as key endogenous resources for future clinical management of periodontal tissue defects.
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Affiliation(s)
- Fa-Ming Chen
- Department of Periodontology & Oral Medicine, School of Stomatology, Fourth Military Medical University, Xi'an, Shaanxi, People's Republic of China.
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95
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Toward delivery of multiple growth factors in tissue engineering. Biomaterials 2010; 31:6279-308. [PMID: 20493521 DOI: 10.1016/j.biomaterials.2010.04.053] [Citation(s) in RCA: 451] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2010] [Accepted: 04/22/2010] [Indexed: 02/06/2023]
Abstract
Inspired by physiological events that accompany the "wound healing cascade", the concept of developing a tissue either in vitro or in vivo has led to the integration of a wide variety of growth factors (GFs) in tissue engineering strategies in an effort to mimic the natural microenvironments of tissue formation and repair. Localised delivery of exogenous GFs is believed to be therapeutically effective for replication of cellular components involved in tissue development and the healing process, thus making them important factors for tissue regeneration. However, any treatment aiming to mimic the critical aspects of the natural biological process should not be limited to the provision of a single GF, but rather should release multiple therapeutic agents at an optimised ratio, each at a physiological dose, in a specific spatiotemporal pattern. Despite several obstacles, delivery of more than one GF at rates mimicking an in vivo situation has promising potential for the clinical management of severely diseased tissues. This article summarises the concept of and early approaches toward the delivery of dual or multiple GFs, as well as current efforts to develop sophisticated delivery platforms for this ambitious purpose, with an emphasis on the application of biomaterials-based deployment technologies that allow for controlled spatial presentation and release kinetics of key biological cues. Additionally, the use of platelet-rich plasma or gene therapy is addressed as alternative, easy, cost-effective and controllable strategies for the release of high concentrations of multiple endogenous GFs, followed by an update of the current progress and future directions of research utilising release technologies in tissue engineering and regenerative medicine.
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96
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Seol YJ, Pellegrini G, Franco LM, Chang PC, Park CH, Giannobile WV. Preclinical methods for the evaluation of periodontal regeneration in vivo. Methods Mol Biol 2010; 666:285-307. [PMID: 20717791 DOI: 10.1007/978-1-60761-820-1_18] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
For the determination of key factors or devices that promote periodontal regeneration, preclinical investigations using in vivo animal models are critical for evaluating the biological responses before human clinical trial testing. In this chapter, we provide an overview on the commonly used preclinical animals for the study of reconstructive procedures to promote bone and soft tissue repair of tooth-supporting periodontal defects. Steps are provided on the animal management for evaluation of outcome measures using descriptive histology, histomorphometry, three-dimensional imaging, and safety assessments. The use of these key measures of periodontal regeneration should aid investigators in the selection of appropriate surrogate endpoints to be utilized in the clinical arena, which are not practical or ethical in humans. These methods will prepare investigators and assist them in identifying endpoints that can then be adapted to human clinical trial planning.
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Affiliation(s)
- Yang-Jo Seol
- Department Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
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