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Ruvinov E, Tavor Re'em T, Witte F, Cohen S. Articular cartilage regeneration using acellular bioactive affinity-binding alginate hydrogel: A 6-month study in a mini-pig model of osteochondral defects. J Orthop Translat 2018; 16:40-52. [PMID: 30723680 PMCID: PMC6350049 DOI: 10.1016/j.jot.2018.08.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 08/08/2018] [Accepted: 08/15/2018] [Indexed: 12/20/2022] Open
Abstract
Background Despite intensive research, regeneration of articular cartilage largely remains an unresolved medical concern as the clinically available modalities still suffer from long-term inconsistent data, relatively high failure rates and high prices of more promising approaches, such as cell therapy. In the present study, we aimed to evaluate the feasibility and long-term efficacy of a bilayered injectable acellular affinity-binding alginate hydrogel in a large animal model of osteochondral defects. Methods The affinity-binding alginate hydrogel is designed for presentation and slow release of chondrogenic and osteogenic inducers (transforming growth factor-β1 and bone morphogenic protein 4, respectively) in two distinct and separate hydrogel layers. The hydrogel was injected into the osteochondral defects created in the femoral medial condyle in mini-pigs, and various outcomes were evaluated after 6 months. Results Macroscopical and histological assessment of the defects treated with growth factor affinity-bound hydrogel showed effective reconstruction of articular cartilage layer, with major features of hyaline tissue, such as a glossy surface and cellular organisation, associated with marked deposition of proteoglycans and type II collagen. Microcomputed tomography showed incomplete bone formation in both treatment groups, which was nevertheless augmented by the presence of affinity-bound growth factors. Importantly, the physical nature of the applied hydrogel ensured its shear resistance, seamless integration and topographical matching to the surroundings and opposing articulating surface. Conclusions The treatment with acellular injectable growth factor-loaded affinity-binding alginate hydrogel resulted in effective tissue restoration with major hallmarks of hyaline cartilage, shown in large animal model after 6-month follow-up. The translational potential of this article This proof-of-concept study in a clinically relevant large animal model showed promising potential of an injectable acellular growth factor-loaded affinity-binding alginate hydrogel for effective repair and regeneration of articular hyaline cartilage, representing a strong candidate for future clinical development.
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Affiliation(s)
- Emil Ruvinov
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Tali Tavor Re'em
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Frank Witte
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Berlin-Brandenburg Center for Regenerative Therapies, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Smadar Cohen
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer Sheva, Israel.,Regenerative Medicine and Stem Cell (RMSC) Research Center, Ben-Gurion University of the Negev, Beer Sheva, Israel.,The Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer Sheva, Israel
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Duan R, Barbieri D, Luo X, Weng J, Bao C, de Bruijn JD, Yuan H. Variation of the bone forming ability with the physicochemical properties of calcium phosphate bone substitutes. Biomater Sci 2018; 6:136-145. [PMID: 29147713 DOI: 10.1039/c7bm00717e] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Because of their bioactive properties and chemical similarity to the inorganic component of bone, calcium phosphate (CaP) materials are widely used for bone regeneration. Six commercially available CaP bone substitutes (Bio-Oss, Actifuse, Bi-Ostetic, MBCP, Vitoss and chronOs) as well as two tricalcium phosphate (TCP) ceramics with either a micron-scale (TCP-B) or submicron-scale (TCP-S) surface structure are characterized and their bone forming potential is evaluated in a canine ectopic implantation model. After 12 weeks of implantation in the paraspinal muscle of four beagles, sporadic bone (0.1 ± 0.1%) is observed in two Actifuse implants (2/4), limited bone (2.1 ± 1.4%) in four MBCP implants (4/4) and abundant bone (21.6 ± 4.5%) is formed in all TCP-S implants (4/4). Bone is not observed in any of the Bio-Oss, Bi-Ostetic, Vitoss, chronOs and TCP-B implants (0/4). When correlating the bone forming potential with the physicochemical properties of each material, we observe that the physical characteristics (e.g. grain size and micropore size at the submicron scale) might be the dominant trigger of material directed bone formation via specific mechanotransduction, instead of protein adsorption, surface mineralization and calcium ion release.
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Affiliation(s)
- Rongquan Duan
- Biomaterials Science and Technology, MIRA Institute, University of Twente, 7500 AE, Enschede, the Netherlands
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Lui JC, Jee YH, Garrison P, Iben JR, Yue S, Ad M, Nguyen Q, Kikani B, Wakabayashi Y, Baron J. Differential aging of growth plate cartilage underlies differences in bone length and thus helps determine skeletal proportions. PLoS Biol 2018; 16:e2005263. [PMID: 30036371 PMCID: PMC6056026 DOI: 10.1371/journal.pbio.2005263] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 06/21/2018] [Indexed: 12/31/2022] Open
Abstract
Bones at different anatomical locations vary dramatically in size. For example, human femurs are 20-fold longer than the phalanges in the fingers and toes. The mechanisms responsible for these size differences are poorly understood. Bone elongation occurs at the growth plates and advances rapidly in early life but then progressively slows due to a developmental program termed “growth plate senescence.” This developmental program includes declines in cell proliferation and hypertrophy, depletion of cells in all growth plate zones, and extensive underlying changes in the expression of growth-regulating genes. Here, we show evidence that these functional, structural, and molecular senescent changes occur earlier in the growth plates of smaller bones (metacarpals, phalanges) than in the growth plates of larger bones (femurs, tibias) and that this differential aging contributes to the disparities in bone length. We also show evidence that the molecular mechanisms that underlie the differential aging between different bones involve modulation of critical paracrine regulatory pathways, including insulin-like growth factor (Igf), bone morphogenetic protein (Bmp), and Wingless and Int-1 (Wnt) signaling. Taken together, the findings reveal that the striking disparities in the lengths of different bones, which characterize normal mammalian skeletal proportions, is achieved in part by modulating the progression of growth plate senescence. The various bones found in human extremities vary dramatically in size. For example, the femur in the thigh is approximately 20 times longer than the phalanges of the toes. The mechanisms that regulate how much a particular bone grows to attain the skeletal proportions of each animal remain mostly unknown. In this study, we sought to uncover these mechanisms and found that this scaling in skeletal size is achieved in part by modulating the rate of aging of growth plates in different bones. Bone elongation occurs at the cartilaginous growth plates and proceeds rapidly in early life but slows and eventually stops due to a developmental program termed “growth plate senescence,” which is used to describe the gradual decline in growth plate function with age. We discovered that this developmental program is more advanced in shorter bones than in longer bones and that this differential aging contributes to the disparities in bone growth. We show that the molecular mechanisms that underlie this differential aging between bones involve differential expression of specific local signaling pathways, which regulate cell proliferation and differentiation in the growth plate. Taken together, we conclude that the striking disparities in the lengths of different bones—characteristic of normal mammalian skeletal proportions—are achieved in part by modulating the progression of aging in the growth plates.
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Affiliation(s)
- Julian C. Lui
- Section on Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
- * E-mail:
| | - Youn Hee Jee
- Section on Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Presley Garrison
- Section on Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - James R. Iben
- Molecular Genomics Core, Office of the Scientific Director, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Shanna Yue
- Section on Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Michal Ad
- Section on Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Quang Nguyen
- Section on Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Bijal Kikani
- Section on Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Yoshiyuki Wakabayashi
- DNA Sequencing and Genomics Core, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Jeffrey Baron
- Section on Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America
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Loozen LD, Kruyt MC, Vandersteen A, Kragten AHM, Croes M, Öner FC, Alblas J. Osteoinduction by Ex Vivo Nonviral Bone Morphogenetic Protein Gene Delivery Is Independent of Cell Type. Tissue Eng Part A 2018; 24:1423-1431. [PMID: 29766760 DOI: 10.1089/ten.tea.2018.0032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Ex vivo nonviral gene delivery of bone inductive factors has the potential to heal bone defects. Due to their inherent role in new bone formation, multipotent stromal cells (MSCs) have been studied as the primary target cell for gene delivery in a preclinical setting. The relative contribution of autocrine and paracrine mechanisms, and the need of osteogenic cells, remains unclear. This study investigates the contribution of MSCs as producer of transgenic bone morphogenetic proteins (BMPs) and to what extent the seeded MSCs participate in actual osteogenesis. Rat-derived MSCs or fibroblasts (FBs) were cotransfected with pBMP-2 and pBMP-6 or pBMP-7 via nucleofection. The bioactivity of BMP products was shown through in vitro osteogenic differentiation assays. To investigate their role in new bone formation, transfected cells were seeded on ceramic scaffolds and implanted subcutaneously in rats. Bone formation was assessed by histomorphometry after 8 weeks. As a proof of principle, we also investigated the suitability of bone marrow-derived mononuclear cells and the stromal vascular fraction isolated from adipose tissue for a one-stage gene delivery strategy. Bone formation was induced in all conditions containing cells overexpressing BMP heterodimers. Constructs seeded with FBs transfected with BMP-2/6 and MSCs transfected with BMP-2/6 showed comparable bone volumes, both significantly higher than controls. Single-stage gene delivery proved possible and resulted in some bone formation. We conclude that bone formation as a result of ex vivo BMP gene delivery can be achieved even without direct osteogenic potential of the transfected cell type, suggesting that transfected cells mainly function as a production facility for osteoinductive proteins. In addition, single-stage transfection and reimplantation of cells appeared feasible, thus facilitating future clinical translation of the method.
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Affiliation(s)
- Loek D Loozen
- Department of Orthopaedics, University Medical Center Utrecht , Utrecht, The Netherlands
| | - Moyo C Kruyt
- Department of Orthopaedics, University Medical Center Utrecht , Utrecht, The Netherlands
| | - Angela Vandersteen
- Department of Orthopaedics, University Medical Center Utrecht , Utrecht, The Netherlands
| | - Angela H M Kragten
- Department of Orthopaedics, University Medical Center Utrecht , Utrecht, The Netherlands
| | - Michiel Croes
- Department of Orthopaedics, University Medical Center Utrecht , Utrecht, The Netherlands
| | - F Cumhur Öner
- Department of Orthopaedics, University Medical Center Utrecht , Utrecht, The Netherlands
| | - Jacqueline Alblas
- Department of Orthopaedics, University Medical Center Utrecht , Utrecht, The Netherlands
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Sternecker K, Geist J, Beggel S, Dietz-Laursonn K, de la Fuente M, Frank HG, Furia JP, Milz S, Schmitz C. Exposure of zebra mussels to extracorporeal shock waves demonstrates formation of new mineralized tissue inside and outside the focus zone. Biol Open 2018; 7:bio.033258. [PMID: 29615415 PMCID: PMC6078343 DOI: 10.1242/bio.033258] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The success rate of extracorporeal shock wave therapy (ESWT) for fracture nonunions in human medicine (i.e. radiographic union at 6 months after ESWT) is only approximately 75%. Detailed knowledge regarding the underlying mechanisms that induce bio-calcification after ESWT is limited. We analyzed the biological response within mineralized tissue of a new invertebrate model organism, the zebra mussel Dreissena polymorpha, after exposure with extracorporeal shock waves (ESWs). Mussels were exposed to ESWs with positive energy density of 0.4 mJ/mm2 (A) or were sham exposed (B). Detection of newly calcified tissue was performed by exposing the mussels to fluorescent markers. Two weeks later, the A-mussels showed a higher mean fluorescence signal intensity within the shell zone than the B-mussels (P<0.05). Acoustic measurements revealed that the increased mean fluorescence signal intensity within the shell of the A-mussels was independent of the size and position of the focal point of the ESWs. These data demonstrate that induction of bio-calcification after ESWT may not be restricted to the region of direct energy transfer of ESWs into calcified tissue. The results of the present study are of relevance for better understanding of the molecular and cellular mechanisms that induce formation of new mineralized tissue after ESWT.
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Affiliation(s)
- Katharina Sternecker
- Extracorporeal Shock Wave Research Unit, Chair of Neuroanatomy, Institute of Anatomy, Faculty of Medicine, LMU Munich, 80336 Munich, Germany
| | - Juergen Geist
- Aquatic System Biology Unit, Department of Ecology and Ecosystem Management, Technical University of Munich, 85354 Freising, Germany
| | - Sebastian Beggel
- Aquatic System Biology Unit, Department of Ecology and Ecosystem Management, Technical University of Munich, 85354 Freising, Germany
| | | | | | - Hans-Georg Frank
- Extracorporeal Shock Wave Research Unit, Chair of Neuroanatomy, Institute of Anatomy, Faculty of Medicine, LMU Munich, 80336 Munich, Germany
| | - John P Furia
- SUN Orthopaedics and Sports Medicine, Division of Evangelical Community Hospital, Lewisburg, PA 17837, USA
| | - Stefan Milz
- Extracorporeal Shock Wave Research Unit, Chair of Neuroanatomy, Institute of Anatomy, Faculty of Medicine, LMU Munich, 80336 Munich, Germany
| | - Christoph Schmitz
- Extracorporeal Shock Wave Research Unit, Chair of Neuroanatomy, Institute of Anatomy, Faculty of Medicine, LMU Munich, 80336 Munich, Germany
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Qamheya AHA, Arısan V, Mutlu Z, Karabaglı M, Soluk Tekkeşin M, Kara K, Erol A, Ersanlı S. Thermal oxidation and hydrofluoric acid treatment on the sandblasted implant surface: A histologic histomorphometric and biomechanical study. Clin Oral Implants Res 2018; 29:741-755. [PMID: 29876965 DOI: 10.1111/clr.13285] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 04/25/2018] [Accepted: 05/02/2018] [Indexed: 12/31/2022]
Abstract
OBJECTIVES This study aimed to analyze and compare the topographical, chemical, and osseointegration characteristics of a sandblasted acid-etched surface (SLA group), a sandblasted thermally oxidized surface (SO group), and a surface chemically modified by hydrofluoric (HF) acid (SOF group). MATERIALS AND METHODS Following the preparation and characterization of the relevant surfaces, 90 implants (30 for each group) were placed on the pelvic bone of six sheep. Resonance frequency analysis (RFA), insertion (ITV), removal torque value (RTV), and histomorphometric analyses (BIC%) were performed after three and 8 weeks of healing. The results were analyzed by nonparametric tests (p < 0.05). RESULTS The roughness value (Ra) in the SOF group was significantly lower than the SLA and the SO group (p = 0.136, p < 0.001, respectively). This resulted in a substantially inferior ITV 14.83 N/cm (SD: 4.04) than those achieved in the SLA and SO groups (19.50 (SD: 6.07) and 20.17 N/cm (SD: 8.95), respectively; p = 0.001). A statistically significant change in the RFA from the baseline (47.36 ISQ, SD: 6.93) to the 3rd week (62.56 ISQ, SD: 5.29) was observed in the SOF group only (p = 0.008). The highest postplacement RFA and RTV values were measured from the SLA group (61.11 ISQ, SD: 7.51 and 78.22 N/cm, SD: 28.73). The early-term (3rd week) BIC% was highest in the SO group (39.93%, SD: 16.14). After 8 weeks, the differences in BIC% values were statistically not significant. CONCLUSIONS Adjunct HF acid application on the thermally oxidized surface did not provide an additional benefit compared to the sandblasted and acid-etched surface (SLA group).
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Affiliation(s)
- Ala Hassan A Qamheya
- Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - Volkan Arısan
- Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - Zihni Mutlu
- Department of Surgery, Faculty of Veterinary Medicine, Istanbul University, Avcilar, Turkey
| | - Murat Karabaglı
- Department of Surgery, Faculty of Veterinary Medicine, Istanbul University, Avcilar, Turkey
| | - Merva Soluk Tekkeşin
- Department of Tumor Pathology, Institute of Oncology, Istanbul University, Istanbul, Turkey
| | - Kamuran Kara
- Department of Physics, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Ayşe Erol
- Department of Physics, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Selim Ersanlı
- Department of Oral Implantology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
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57
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Croes M, Kruyt MC, Groen WM, van Dorenmalen KMA, Dhert WJA, Öner FC, Alblas J. Interleukin 17 enhances bone morphogenetic protein-2-induced ectopic bone formation. Sci Rep 2018; 8:7269. [PMID: 29740080 PMCID: PMC5940874 DOI: 10.1038/s41598-018-25564-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 04/24/2018] [Indexed: 02/06/2023] Open
Abstract
Interleukin 17 (IL-17) stimulates the osteogenic differentiation of progenitor cells in vitro through a synergy with bone morphogenetic protein (BMP)-2. This study investigates whether the diverse responses mediated by IL-17 in vivo also lead to enhanced BMP-2-induced bone formation. Since IL-17 is known to induce osteoclastogenesis, we studied the interactions between IL-17 and BMP-2 in ceramic scaffolds either or not carrying a coating with the bisphosphonate zoledronic acid (ZOL). Histological evaluation revealed that IL-17 alone did not induce any osteoclasts at day 10. On the other hand, BMP-2 clearly stimulated early tissue ingrowth and osteoclastogenesis. Both of these processes were blocked in presence of ZOL. IL-17 signaling restored early vascularized connective tissue formation and osteoclastogenesis induced by BMP-2 in ZOL-coated scaffolds. After 12 weeks, the bone volume induced by co-delivery of BMP-2 and IL-17 was doubled as compared to that induced by BMP-2 alone. We conclude that IL-17 has osteo-stimulatory effects through a synergy with bone-inductive BMP-2. Although local and single application of IL-17 does not mediate osteoclast formation, it could promote other processes involved in bone formation such as connective tissue ingrowth. The use of IL-17 may contribute to the development of improved bone graft substitutes.
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Affiliation(s)
- M Croes
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - M C Kruyt
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - W M Groen
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - K M A van Dorenmalen
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - W J A Dhert
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.,Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3508 TD, Utrecht, The Netherlands
| | - F C Öner
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands
| | - J Alblas
- Department of Orthopaedics, University Medical Centre Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, The Netherlands.
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Martínez-Vargas J, Muñoz-Muñoz F, López-Fuster MJ, Cubo J, Ventura J. Multimethod Approach to the Early Postnatal Growth of the Mandible in Mice from a Zone of Robertsonian Polymorphism. Anat Rec (Hoboken) 2018; 301:1360-1381. [PMID: 29669189 DOI: 10.1002/ar.23835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 11/30/2017] [Accepted: 12/27/2017] [Indexed: 11/11/2022]
Abstract
The western European house mouse (Mus musculus domesticus) shows high karyotypic diversity owing to Robertsonian translocations. Morphometric studies conducted with adult mice suggest that karyotype evolution due to these chromosomal reorganizations entails variation in the form and the patterns of morphological covariation of the mandible. However, information is much scarcer regarding the effect of these rearrangements on the growth pattern of the mouse mandible over early postnatal ontogeny. Here we compare mandible growth from the second to the eighth week of postnatal life between two ontogenetic series of mice from wild populations, with the standard karyotype and with Robertsonian translocations respectively, reared under the same conditions. A multi-method approach is used, including bone histology analyses of mandible surfaces and cross-sections, as well as geometric morphometric analyses of mandible form. The mandibles of both standard and Robertsonian mice display growth acceleration around weaning, anteroposterior direction of bone maturation, a predominance of bone deposition fields over ontogeny, and relatively greater expansion of the posterior mandible region correlated with the ontogenetic increase in mandible size. Nevertheless, differences exist between the two mouse groups regarding the timing of histological maturation of the mandible, the localization of certain bone remodeling fields, the temporospatial patterns of morphological variation, and the organization into two main modules. The dissimilarities in the process of mandible growth between the two groups of mice become more evident around sexual maturity, and could arise from alterations that Robertsonian translocations may exert on genes involved in the bone remodeling mechanism. Anat Rec, 2018. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Jessica Martínez-Vargas
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain
| | - Francesc Muñoz-Muñoz
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain
| | - María José López-Fuster
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, and Institut de Recerca de la Biodiversitat (IRBio), Facultat de Biologia, Universitat de Barcelona, E-08028 Barcelona, Spain
| | - Jorge Cubo
- Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP UMR 7193, F-75005 Paris, France
| | - Jacint Ventura
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Cerdanyola del Vallès), Spain
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Yu Y, Lu H, Sun J. Long-term in vivo evolution of high-purity Mg screw degradation - Local and systemic effects of Mg degradation products. Acta Biomater 2018; 71:215-224. [PMID: 29505891 DOI: 10.1016/j.actbio.2018.02.023] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 02/08/2018] [Accepted: 02/22/2018] [Indexed: 12/12/2022]
Abstract
Magnesium (Mg) based materials are the focus of research for use as degradable materials in orthopedics and cranio-maxillofacial surgery. However, corrosion rate control and biosecurity are still the key issues that need to be solved prior to their clinical applications. In the present study, as-rolled high-purity magnesium (HP Mg, 99.99 wt%) screws were implanted in rabbit tibiae for up to 52 weeks in order to investigate their long-term in vivo degradation and the local and systemic effects of their degradation products. A series of long-term monitoring were performed at various time points (4w, 12w, 26w and 52w) after implantation using numerous investigations such as micro-CT assay, histomorphometric analysis, local micro-environment testing and biochemical analysis of serum and urine. It was revealed that HP Mg screws had a uniform degradation morphology and a slow degradation rate in vivo during the period of 52 weeks. Their degradation products not only increased the local pH values but also changed the local Mg2+ ions concentration and gas cavity area in the peri-implant tissues in a dynamic manner. More importantly, both the new bone formation and bone-implant contact rate were increased at bone-implant interfaces at 26 weeks and 52 weeks post-implantation. Furthermore, neither abnormal elevation of serum magnesium and urine magnesium level, nor liver and kidney dysfunction were detected during the monitoring period of 26 weeks. All these results of long-term investigation suggest that HP Mg screws possess a slow degradation rate, desirable bone repair capacity and long-term local/systemic biosafety, and consequently may have good potential for application as bone fixation devices. STATEMENT OF SIGNIFICANCE The corrosion resistance control and biosecurity issues of Mg alloys limited their clinical applications in some extent. Mg purification is another effective way to improve corrosion resistance of Mg-based materials. However, the long-term in vivo degradation of high-purity magnesium (HP Mg) and the local and systemic effects of its degradation products have not been fully investigated yet, which are the key factors to determine the clinical application prospect of HP Mg. Especially the changes in peri-implant microenvironment may greatly influence the local physiological response and bone repair. In this study, the long-term evolution tendency of in vivo degradation behavior of HP Mg screws was discovered from the view of space-time. Furthermore, not only the dynamic changes of local microenvironment and the long-term evolution process of bone repair, but also the dynamic systemic responses were systematically revealed. Conclusions of this study may help us to further understand the long-term in vivo evolution of HP Mg degradation and the local/systemic effects of its degradation products and help to guide the design of biodegradable bone fixation material.
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Macri-Pellizzeri L, De Melo N, Ahmed I, Grant D, Scammell B, Sottile V. Live Quantitative Monitoring of Mineral Deposition in Stem Cells Using Tetracycline Hydrochloride. Tissue Eng Part C Methods 2018; 24:171-178. [PMID: 29353532 PMCID: PMC5865259 DOI: 10.1089/ten.tec.2017.0400] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The final stage of in vitro osteogenic differentiation is characterized by the production of mineral deposits containing calcium cations and inorganic phosphates, which populate the extracellular matrix (ECM) surrounding the cell monolayer. Conventional histological techniques for the assessment of mineralization, such as Von Kossa and Alizarin Red S staining, are end point techniques requiring cell fixation. Moreover, in both cases staining quantitation requires dye extraction, which irreversibly alters the ECM conformation and structure, therefore preventing the use of the sample for further analysis. In this study, the use of tetracycline hydrochloride (TC) is proposed for the nondestructive staining, quantitation, and imaging of mineralizing bone-like nodules in live cultures of human bone marrow mesenchymal stem cells cultured under osteogenic conditions. Overnight administration of TC to living cells was shown not to alter the metabolic activity or the progression of cell differentiation. When applied to differentiating cultures, cell exposure to serial doses of TC was found to produce quantifiable fluorescence emission specifically in osteogenic cultures. Incubation with TC enabled fluorescence imaging of mineralized areas in live cultures and the combination with other fluorophores using appropriate filters. These results demonstrate that serial TC administration over the differentiation time course provides a qualitative and quantitative tool for the monitoring and evaluation of the differentiation process in live cells.
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Affiliation(s)
- Laura Macri-Pellizzeri
- 1 Wolfson STEM Centre, Division of Cancer and Stem Cells, School of Medicine, The University of Nottingham , Nottingham, United Kingdom .,2 Advanced Materials Group, Department of Mechanical, Materials and Manufacturing Engineering, Faculty of Engineering, The University of Nottingham , Nottingham, United Kingdom
| | - Nigel De Melo
- 1 Wolfson STEM Centre, Division of Cancer and Stem Cells, School of Medicine, The University of Nottingham , Nottingham, United Kingdom
| | - Ifty Ahmed
- 2 Advanced Materials Group, Department of Mechanical, Materials and Manufacturing Engineering, Faculty of Engineering, The University of Nottingham , Nottingham, United Kingdom
| | - David Grant
- 2 Advanced Materials Group, Department of Mechanical, Materials and Manufacturing Engineering, Faculty of Engineering, The University of Nottingham , Nottingham, United Kingdom
| | - Brigitte Scammell
- 3 Orthopaedics and Trauma Group, Division of Rheumatology, Orthopaedics, and Dermatology, School of Medicine, The University of Nottingham , Nottingham, United Kingdom
| | - Virginie Sottile
- 1 Wolfson STEM Centre, Division of Cancer and Stem Cells, School of Medicine, The University of Nottingham , Nottingham, United Kingdom
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Kim JH, Park MH, Jang SJ, Son SJ, Lee JY, Son JS, Kim SE, Kang SS, Choi SH. Effect of Hydrogen Dioxide Treatment on the Osteogenic Potential of Duck-beak Bone-derived Natural Bioceramic Microparticles. ACTA ACUST UNITED AC 2018; 31:373-379. [PMID: 28438865 DOI: 10.21873/invivo.11069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 03/13/2017] [Accepted: 03/14/2017] [Indexed: 02/05/2023]
Abstract
BACKGROUND/AIM As an alternative material to the autogenous bone, duck-beak bone particle for bone substitute have been attracting great attention due to their biological properties. To deliver the most favorable outcome of medical treatment, it is essential to study the effect of various processing methods of the duck-beak bone. In this study, we compared the two deproteinizing agents for manufacturing duck-beak bone. Group 1 was treated by a conventional chemical agent (ethylenediamine) and Group 2 by hydrogen dioxide (H2O2). In vitro and in vivo experiments were conducted in parallel to compare the cytocompatibility and osteogenic capability between two processing methods. For in vitro tests, human adipose-derived mesenchymal stem cells (hAD-MSCs) were planted onto each sample and their attachment and growing were evaluated. For in vivo biocompatibility and osteogenic properties, the samples were applied on the critical-sized calvarial bone defect of rats. Group 2 showed significantly higher cell attachment but Group1 showed slightly higher cell proliferation. In in vivo tests, all groups have shown biocompatibility and increased level of osteogenic potential. However, Group 2 had significantly higher bone regeneration (p<0.05). This experiment confirmed that H2O2 can be an optimal processing method for duck-beak bone particle.
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Affiliation(s)
- Joong-Hyun Kim
- Department of Periodontology, School of Dentistry, Chonbuk National University, Jeonju, Republic of Korea
| | - Min-Ho Park
- Department of Veterinary Surgery, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Seok Jin Jang
- Department of Veterinary Surgery, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Soo Jin Son
- Department of Veterinary Surgery, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Jae Yeon Lee
- Department of Veterinary Surgery, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
| | - Jun Sik Son
- High-Tech Fiber R&D Headquarters, Korea Textile Development Institute, Daegu, Republic of Korea
| | - Se Eun Kim
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Seong Soo Kang
- College of Veterinary Medicine, Chonnam National University, Gwangju, Republic of Korea
| | - Seok Hwa Choi
- Department of Veterinary Surgery, Veterinary Medical Center and College of Veterinary Medicine, Chungbuk National University, Cheongju, Republic of Korea
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Dias IR, Viegas CA, Carvalho PP. Large Animal Models for Osteochondral Regeneration. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1059:441-501. [PMID: 29736586 DOI: 10.1007/978-3-319-76735-2_20] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Namely, in the last two decades, large animal models - small ruminants (sheep and goats), pigs, dogs and horses - have been used to study the physiopathology and to develop new therapeutic procedures to treat human clinical osteoarthritis. For that purpose, cartilage and/or osteochondral defects are generally performed in the stifle joint of selected large animal models at the condylar and trochlear femoral areas where spontaneous regeneration should be excluded. Experimental animal care and protection legislation and guideline documents of the US Food and Drug Administration, the American Society for Testing and Materials and the International Cartilage Repair Society should be followed, and also the specificities of the animal species used for these studies must be taken into account, such as the cartilage thickness of the selected defect localization, the defined cartilage critical size defect and the joint anatomy in view of the post-operative techniques to be performed to evaluate the chondral/osteochondral repair. In particular, in the articular cartilage regeneration and repair studies with animal models, the subchondral bone plate should always be taken into consideration. Pilot studies for chondral and osteochondral bone tissue engineering could apply short observational periods for evaluation of the cartilage regeneration up to 12 weeks post-operatively, but generally a 6- to 12-month follow-up period is used for these types of studies.
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Affiliation(s)
- Isabel R Dias
- Department of Veterinary Sciences, Agricultural and Veterinary Sciences School, University of Trás-os-Montes e Alto Douro (UTAD), Vila Real, Portugal. .,3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco - Guimarães, 4805-017, Portugal. .,Department of Veterinary Medicine, ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
| | - Carlos A Viegas
- Department of Veterinary Sciences, Agricultural and Veterinary Sciences School, University of Trás-os-Montes e Alto Douro (UTAD), Vila Real, Portugal.,3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark - Parque da Ciência e Tecnologia, Zona Industrial da Gandra, Barco - Guimarães, 4805-017, Portugal.,Department of Veterinary Medicine, ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Pedro P Carvalho
- Department of Veterinary Medicine, University School Vasco da Gama, Av. José R. Sousa Fernandes 197, Lordemão, Coimbra, 3020-210, Portugal.,CIVG - Vasco da Gama Research Center, University School Vasco da Gama, Coimbra, Portugal
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63
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Croes M, Boot W, Kruyt MC, Weinans H, Pouran B, van der Helm YJ, Gawlitta D, Vogely HC, Alblas J, Dhert WJ, Öner FC. Inflammation-Induced Osteogenesis in a Rabbit Tibia Model. Tissue Eng Part C Methods 2017. [DOI: 10.1089/ten.tec.2017.0151] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Michiel Croes
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Willemijn Boot
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Moyo C. Kruyt
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Harrie Weinans
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology, Delft, The Netherlands
- Department of Rheumatology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Behdad Pouran
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology, Delft, The Netherlands
| | | | - Debby Gawlitta
- Department of Oral and Maxillofacial Surgery & Special Dental Care, University Medical Center Utrecht, Utrecht, The Netherlands
| | - H. Charles Vogely
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Jacqueline Alblas
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Wouter J.A. Dhert
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
- Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - F. Cumhur Öner
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
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Martins R, Cestari TM, Arantes RVN, Santos PS, Taga R, Carbonari MJ, Oliveira RC. Osseointegration of zirconia and titanium implants in a rabbit tibiae model evaluated by microtomography, histomorphometry and fluorochrome labeling analyses. J Periodontal Res 2017; 53:210-221. [PMID: 29044523 DOI: 10.1111/jre.12508] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2017] [Indexed: 02/02/2023]
Abstract
OBJECTIVES This study compares the osseointegration of machined-zirconia implants containing yttria (M-Y-TZP) with machined (M-Ti) and resorbable blast media (RBM-Ti) titanium implants. MATERIAL AND METHODS M-Y-TZP, M-Ti and RBM-Ti implants were randomly placed in rabbit tibiae. Fluorochrome bone labels (tetracycline, alizarin and calcein) were administered at different time periods. After 8 weeks, osseointegration was evaluated in terms of bone-to-implant contact (BIC), new bone area (nBA), remaining cortical bone area (rBA) and temporal quantification of fluorochromes, using micro-CT and histomorphometric analyses. RESULTS RBM-Ti implants showed higher resorption of the remaining cortical bone and bone formation (rBA = 36.9% and nBA = 38.8%) than M-Y-TZP implants (rBA = 48% and nBA = 26.5%). The BIC values showed no differences among the groups in the cortical region (mean = 52.2%) but in the medullary region, they were 0.45-fold higher in the RBM-Ti group (51.2%) than in the M-Y-TZP group (35.2%). In all groups, high incorporation of tetracycline was observed (2nd to 4th weeks), followed by alizarin (4th to 6th weeks) and calcein (6th to 8th weeks). In the cortical region, incorporation of tetracycline was similar between RBM-Ti (49.8%) and M-Y-TZP (35.9%) implants, but higher than M-Ti (28.2%) implants. Subsequently, alizarin and calcein were 1.1-fold higher in RBM-Ti implants than in the other implants. In the medullary region, no significant differences were observed for all fluorochromes. CONCLUSION All implants favored bone formation and consequently promoted primary stability. Bone formation around the threads was faster in RBM-Ti and M-Y-TZP implants than in M-Ti implants, but limited bone remodeling with M-Y-TZP implants over time can have significant effects on secondary stability, suggesting caution for its use as an alternative substitute for titanium implants.
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Affiliation(s)
- R Martins
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - T M Cestari
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - R V N Arantes
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - P S Santos
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - R Taga
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - M J Carbonari
- Insper - Instituto de Ensino e Pesquisa, São Paulo, SP, Brazil
| | - R C Oliveira
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
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65
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Das Neves Borges P, Vincent TL, Marenzana M. Application of autofluorescence robotic histology for quantitative evaluation of the 3-dimensional morphology of murine articular cartilage. Microsc Res Tech 2017; 80:1351-1360. [PMID: 28963813 PMCID: PMC5725668 DOI: 10.1002/jemt.22948] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 09/04/2017] [Accepted: 09/18/2017] [Indexed: 12/17/2022]
Abstract
Murine models of osteoarthritis (OA) are increasingly important for understating pathogenesis and for testing new therapeutic approaches. Their translational potential is, however, limited by the reduced size of mouse limbs which requires a much higher resolution to evaluate their articular cartilage compared to clinical imaging tools. In experimental models, this tissue has been predominantly assessed by time-consuming histopathology using standardized semi-quantitative scoring systems. This study aimed to develop a novel imaging method for 3-dimensional (3D) histology of mouse articular cartilage, using a robotic system-termed here "3D histocutter"-which automatically sections tissue samples and serially acquires fluorescence microscopy images of each section. Tibiae dissected from C57Bl/6 mice, either naïve or OA-induced by surgical destabilization of the medial meniscus (DMM), were imaged using the 3D histocutter by exploiting tissue autofluorescence. Accuracy of 3D imaging was validated by ex vivo contrast-enhanced micro-CT and sensitivity to lesion detection compared with conventional histology. Reconstructions of tibiae obtained from 3D histocutter serial sections showed an excellent agreement with contrast-enhanced micro-CT reconstructions. Furthermore, osteoarthritic features, including articular cartilage loss and osteophytes, were also visualized. An in-house developed software allowed to automatically evaluate articular cartilage morphology, eliminating the subjectivity associated to semi-quantitative scoring and considerably increasing analysis throughput. The novelty of this methodology is, not only the increased throughput in imaging and evaluating mouse articular cartilage morphology starting from conventionally embedded samples, but also the ability to add the third dimension to conventional histomorphometry which might be useful to improve disease assessment in the model.
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Affiliation(s)
| | - Tonia L Vincent
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford, United Kingdom
| | - Massimo Marenzana
- Department of Bioengineering, Imperial College London, London, United Kingdom.,Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Roosevelt Drive, Oxford, United Kingdom
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Martínez-Vargas J, Martinez-Maza C, Muñoz-Muñoz F, Medarde N, Lamrous H, López-Fuster MJ, Cubo J, Ventura J. Comparative postnatal histomorphogenesis of the mandible in wild and laboratory mice. Ann Anat 2017; 215:8-19. [PMID: 28935565 DOI: 10.1016/j.aanat.2017.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 05/19/2017] [Accepted: 09/01/2017] [Indexed: 12/11/2022]
Abstract
The coordinated activity of bone cells (i.e., osteoblasts and osteoclasts) during ontogeny underlies observed changes in bone growth rates (recorded in bone histology and bone microstructure) and bone remodeling patterns explaining the ontogenetic variation in bone size and shape. Histological cross-sections of the mandible in the C57BL/6J inbred mouse strain were recently examined in order to analyze the bone microstructure, as well as the directions and rates of bone growth according to the patterns of fluorescent labeling, with the aim of description of the early postnatal histomorphogenesis of this skeletal structure. Here we use the same approach to characterize the histomorphogenesis of the mandible in wild specimens of Mus musculus domesticus, from the second to the eighth week of postnatal life, for the first time. In addition, we assess the degree of similarity in this biological process between the wild specimens examined and the C57BL/6J laboratory strain. Bone microstructure data show that M. musculus domesticus and the C57BL/6J strain differ in the temporospatial pattern of histological maturation of the mandible, which particularly precludes the support of mandibular organization into the alveolar region and the ascending ramus modules at the histological level in M. musculus domesticus. The patterns of fluorescent labeling reveal that the mandible of the wild mice exhibits temporospatial differences in the remodeling pattern, as well as higher growth rates particularly after weaning, compared to the laboratory mice. Since the two mouse groups were reared under the same conditions, the dissimilarities found suggest the existence of differences between the groups in the genetic regulation of bone remodeling, probably as a result of their different genetic backgrounds. Despite the usual suitability of inbred mouse strains as model organisms, inferences from them to natural populations regarding bone growth should be made with caution.
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Affiliation(s)
- Jessica Martínez-Vargas
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Campus de Bellaterra, E-08193 Cerdanyola del Vallès, Spain.
| | - Cayetana Martinez-Maza
- Departamento de Paleobiología, Museo Nacional de Ciencias Naturales (CSIC), C/José Gutiérrez Abascal 2, E-28006 Madrid, Spain.
| | - Francesc Muñoz-Muñoz
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Campus de Bellaterra, E-08193 Cerdanyola del Vallès, Spain.
| | - Nuria Medarde
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Campus de Bellaterra, E-08193 Cerdanyola del Vallès, Spain.
| | - Hayat Lamrous
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut des Sciences de la Terre Paris (iSTeP), 4 place Jussieu, BC 19, F-75005 Paris, France.
| | - María José López-Fuster
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals and Institut de Recerca de la Biodiversitat (IRBio), Facultat de Biologia, Universitat de Barcelona, Av. Diagonal 645, E-08028 Barcelona, Spain.
| | - Jorge Cubo
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Institut des Sciences de la Terre Paris (iSTeP), 4 place Jussieu, BC 19, F-75005 Paris, France.
| | - Jacint Ventura
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Facultat de Biociències, Universitat Autònoma de Barcelona, Campus de Bellaterra, E-08193 Cerdanyola del Vallès, Spain.
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Effects of Titanium Mesh Surfaces-Coated with Hydroxyapatite/β-Tricalcium Phosphate Nanotubes on Acetabular Bone Defects in Rabbits. Int J Mol Sci 2017; 18:ijms18071462. [PMID: 28686210 PMCID: PMC5535953 DOI: 10.3390/ijms18071462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Revised: 06/23/2017] [Accepted: 07/04/2017] [Indexed: 11/17/2022] Open
Abstract
The management of severe acetabular bone defects in revision reconstructive orthopedic surgery is challenging. In this study, cyclic precalcification (CP) treatment was used on both nanotube-surface Ti-mesh and a bone graft substitute for the acetabular defect model, and its effects were assessed in vitro and in vivo. Nanotube-Ti mesh coated with hydroxyapatite/β-tricalcium phosphate (HA/β-TCP) was manufactured by an anodizing and a sintering method, respectively. An 8 mm diameter defect was created on each acetabulum of eight rabbits, then treated by grafting materials and covered by Ti meshes. At four and eight weeks, postoperatively, biopsies were performed for histomorphometric analyses. The newly-formed bone layers under cyclic precalcified anodized Ti (CP-AT) meshes were superior with regard to the mineralized area at both four and eight weeks, as compared with that under untreated Ti meshes. Active bone regeneration at 2-4 weeks was stronger than at 6-8 weeks, particularly with treated biphasic ceramic (p < 0.05). CP improved the bioactivity of Ti meshes and biphasic grafting materials. Moreover, the precalcified nanotubular Ti meshes could enhance early contact bone formation on the mesh and, therefore, may reduce the collapse of Ti meshes into the defect, increasing the sufficiency of acetabular reconstruction. Finally, cyclic precalcification did not affect bone regeneration by biphasic grafting materials in vivo.
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68
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Boot W, Gawlitta D, Nikkels PGJ, Pouran B, van Rijen MHP, Dhert WJA, Vogely HC. Hyaluronic Acid-Based Hydrogel Coating Does Not Affect Bone Apposition at the Implant Surface in a Rabbit Model. Clin Orthop Relat Res 2017; 475:1911-1919. [PMID: 28303535 PMCID: PMC5449332 DOI: 10.1007/s11999-017-5310-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Accepted: 02/28/2017] [Indexed: 01/31/2023]
Abstract
BACKGROUND Uncemented orthopaedic implants rely on the bone-implant interface to provide stability, therefore it is essential that a coating does not interfere with the bone-forming processes occurring at the implant interface. In addition, local application of high concentrations of antibiotics for prophylaxis or treatment of infection may be toxic for osteoblasts and could impair bone growth. QUESTIONS/PURPOSES In this animal study, we investigated the effect of a commercially available hydrogel, either unloaded or loaded with 2% vancomycin. We asked, does unloaded hydrogel or hydrogel with vancomycin (1) interfere with bone apposition and timing of bone deposition near the implant surface; and (2) induce a local or systemic inflammatory reaction as determined by inflammation around the implant and hematologic parameters. METHODS In 18 New Zealand White rabbits, an uncoated titanium rod (n = 6), a rod coated with unloaded hydrogel (n = 6), or a rod coated with 2% vancomycin-loaded hydrogel (n = 6) was implanted in the intramedullary canal of the left tibia. After 28 days, the bone volume fraction near the implant was measured with microCT analysis, inflammation was semiquantitatively scored on histologic sections, and timing of bone apposition was followed by semiquantitative scoring of fluorochrome incorporation on histologic sections. Two observers, blinded to the treatment, scored the sections and reconciled their scores if there was a disagreement. The hematologic inflammatory reaction was analyzed by measuring total and differential leukocyte counts and erythrocyte sedimentation rates in blood. With group sizes of six animals per group, we had 79% power to detect a difference of 25% in histologic scoring for infection and inflammation. RESULTS No differences were found in the amount of bone apposition near the implant in the No Gel group (48.65% ± 14.95%) compared with the Gel group (59.97% ± 5.02%; mean difference [MD], 11.32%; 95% CI, -3.89% to 26.53%; p = 0.16) or for the Van2 group (56.12% ± 10.06%; MD, 7.46; 95% CI, -7.75 to 22.67; p = 0.40), with the numbers available. In addition, the scores for timing of bone apposition did not differ between the No Gel group (0.50 ± 0.55) compared with the Gel group (0.33 ± 0.52; MD, -0.17; 95% CI, -0.86 to 0.53; p = 0.78) or the Van2 group (0.83 ± 0.41; MD, 0.33; 95% CI, -0.36 to 1.03; p = 0.42). Furthermore, we detected no differences in the histopathology scores for inflammation in the No Gel group (2.33 ± 1.67) compared with the Gel group (3.17 ± 1.59; MD, 0.83; 95% CI, -0.59 to 2.26; p = 0.31) or to the Van2 group (2.5 ± 1.24; MD, 0.17; 95% CI, -1.26 to 1.59; p = 0.95). Moreover, no differences in total leukocyte count, erythrocyte sedimentation rate, and neutrophil, monocyte, eosinophil, basophil, and lymphocyte counts were present between the No Gel or Van2 groups compared with the Gel control group, with the numbers available. CONCLUSION The hydrogel coated on titanium implants, unloaded or loaded with 2% vancomycin, had no effect on the volume or timing of bone apposition near the implant, and did not induce an inflammatory reaction in vivo, with the numbers available. CLINICAL RELEVANCE Antibiotic-loaded hydrogel may prove to be a valuable option to protect orthopaedic implants from bacterial colonization. Future clinical safety studies will need to provide more evidence that this product does not impair bone formation near the implant and prove the safety of this product.
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Affiliation(s)
- W. Boot
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - D. Gawlitta
- Department of Oral and Maxillofacial Surgery & Special Dental Care, University Medical Center Utrecht, Utrecht, The Netherlands
| | - P. G. J. Nikkels
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - B. Pouran
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - M. H. P. van Rijen
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - W. J. A. Dhert
- Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - H. Ch. Vogely
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
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Zhou D, Qi C, Chen YX, Zhu YJ, Sun TW, Chen F, Zhang CQ. Comparative study of porous hydroxyapatite/chitosan and whitlockite/chitosan scaffolds for bone regeneration in calvarial defects. Int J Nanomedicine 2017; 12:2673-2687. [PMID: 28435251 PMCID: PMC5388207 DOI: 10.2147/ijn.s131251] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Hydroxyapatite (HAP; Ca10(PO4)6(OH)2) and whitlockite (WH; Ca18Mg2(HPO4)2(PO4)12) are widely utilized in bone repair because they are the main components of hard tissues such as bones and teeth. In this paper, we synthesized HAP and WH hollow microspheres by using creatine phosphate disodium salt as an organic phosphorus source in aqueous solution through microwave-assisted hydrothermal method. Then, we prepared HAP/chitosan and WH/chitosan composite membranes to evaluate their biocompatibility in vitro and prepared porous HAP/chitosan and WH/chitosan scaffolds by freeze drying to compare their effects on bone regeneration in calvarial defects in a rat model. The experimental results indicated that the WH/chitosan composite membrane had a better biocompatibility, enhancing proliferation and osteogenic differentiation ability of human mesenchymal stem cells than HAP/chitosan. Moreover, the porous WH/chitosan scaffold can significantly promote bone regeneration in calvarial defects, and thus it is more promising for applications in tissue engineering such as calvarial repair compared to porous HAP/chitosan scaffold.
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Affiliation(s)
- Ding Zhou
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai Jiaotong University
| | - Chao Qi
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People’s Republic of China
| | - Yi-Xuan Chen
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai Jiaotong University
| | - Ying-Jie Zhu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People’s Republic of China
| | - Tuan-Wei Sun
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People’s Republic of China
| | - Feng Chen
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, People’s Republic of China
| | - Chang-Qing Zhang
- Department of Orthopedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai Jiaotong University
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Katunar MR, Gomez Sanchez A, Santos Coquillat A, Civantos A, Martinez Campos E, Ballarre J, Vico T, Baca M, Ramos V, Cere S. In vitro and in vivo characterization of anodised zirconium as a potential material for biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:957-968. [PMID: 28415552 DOI: 10.1016/j.msec.2017.02.139] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 12/14/2016] [Accepted: 02/24/2017] [Indexed: 01/07/2023]
Abstract
In vitro studies offer the insights for the understanding of the mechanisms at the tissue-implant interface that will provide an effective functioning in vivo. The good biocompatibility of zirconium makes a good candidate for biomedical applications and the attractive in vivo performance is mainly due to the presence of a protective oxide layer. The aim of this study is to evaluate by in vitro and in vivo approach, the influence of surface modification achieved by anodisation at 30 and 60V on zirconium implants on the first steps of the osseointegration process. In this study cell attachment, proliferation and morphology of mouse myoblast C2C12-GFP and in mouse osteoprogenitor MC3T3-E1 cells was evaluated. Also, together with the immune system response, osteoclast differentiation and morphology with RAW 264.7 murine cell line were analysed. It was found that anodisation treatment at 60V enhanced cell spreading and the osteoblastic and osteoclastic cells morphology, showing a strong dependence on the surface characteristics. In vivo tests were performed in a rat femur osteotomy model. Dynamical and static histological and histomorphometric analyses were developed 15 and 30days after surgery. Newly formed bone around Zr60V implants showed a continuous newly compact and homogeneous bone just 15 after surgery, as judged by the enhanced thickness and mineralization rate. The results indicate that anodising treatment at 60V could be an effective improvement in the osseointegration of zirconium by stimulating adhesion, proliferation, morphology, new bone thickness and bone mineral apposition, making zirconium an emerging candidate material for biomedical applications.
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Affiliation(s)
- Maria R Katunar
- INTEMA, Universidad Nacional de Mar del Plata-CONICET, Juan B. Justo, 4302, B7608FDQ, Mar del Plata, Argentina.
| | - Andrea Gomez Sanchez
- INTEMA, Universidad Nacional de Mar del Plata-CONICET, Juan B. Justo, 4302, B7608FDQ, Mar del Plata, Argentina
| | - Ana Santos Coquillat
- Instituto de Estudios Biofuncionales, Universidad Complutense de Madrid, Madrid, España
| | - Ana Civantos
- Instituto de Ciencia y Tecnología de Polímeros, CSIC, Madrid, Spain
| | | | - Josefina Ballarre
- INTEMA, Universidad Nacional de Mar del Plata-CONICET, Juan B. Justo, 4302, B7608FDQ, Mar del Plata, Argentina
| | - Tamara Vico
- INTEMA, Universidad Nacional de Mar del Plata-CONICET, Juan B. Justo, 4302, B7608FDQ, Mar del Plata, Argentina
| | - Matias Baca
- Traumatologia y Ortopedia, Hospital Interzonal General de Agudos "Oscar Alende", Mar del Plata, Argentina
| | - Viviana Ramos
- Instituto de Ciencia y Tecnología de Polímeros, CSIC, Madrid, Spain
| | - Silvia Cere
- INTEMA, Universidad Nacional de Mar del Plata-CONICET, Juan B. Justo, 4302, B7608FDQ, Mar del Plata, Argentina
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Veronesi F, Giavaresi G, Fini M, Longo G, Ioannidu CA, Scotto d'Abusco A, Superti F, Panzini G, Misiano C, Palattella A, Selleri P, Di Girolamo N, Garbarino V, Politi L, Scandurra R. Osseointegration is improved by coating titanium implants with a nanostructured thin film with titanium carbide and titanium oxides clustered around graphitic carbon. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 70:264-271. [DOI: 10.1016/j.msec.2016.08.076] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 07/26/2016] [Accepted: 08/29/2016] [Indexed: 01/02/2023]
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72
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Wang X, Meng X, Chu S, Xiang X, Liu Z, Zhao J, Zhou Y. Osseointegration behavior of novel Ti-Nb-Zr-Ta-Si alloy for dental implants: an in vivo study. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:139. [PMID: 27534399 DOI: 10.1007/s10856-016-5755-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 07/09/2016] [Indexed: 06/06/2023]
Abstract
This study aimed to evaluate the effects of Ti-Nb-Zr-Ta-Si alloy implants on mineral apposition rate and new BIC contact in rabbits. Twelve Ti-Nb-Zr-Ta-Si alloy implants were fabricated and placed into the right femur sites in six rabbits, and commercially pure titanium implants were used as controls in the left femur. Tetracycline and alizarin red were administered 3 weeks and 1 week before euthanization, respectively. At 4 weeks and 8 weeks after implantation, animals were euthanized, respectively. Surface characterization and implant-bone contact surface analysis were performed by using a scanning electron microscope and an energy dispersive X-ray detector. Mineral apposition rate was evaluated using a confocal laser scanning microscope. Toluidine blue staining was performed on undecalcified sections for histology and histomorphology evaluation. Scanning electron microscope and histomorphology observation revealed a direct contact between implants and bone of all groups. After a healing period of 4 weeks, Ti-Nb-Zr-Ta-Si alloy implants showed significantly higher mineral apposition rate compared to commercially pure titanium implants (P < 0.05), whereas there was no significant difference between Ti-Nb-Zr-Ta-Si alloy implants and commercially pure titanium implants (P > 0.05) at 8 weeks. No significant difference of bone-to-implant contact was observed between Ti-Nb-Zr-Ta-Si alloy implants and commercially pure titanium implants implants after a healing period of 4 weeks and 8 weeks. This study showed that Ti-Nb-Zr-Ta-Si alloy implants could establish a close direct contact comparedto commercially pure titanium implants implants, improved mineral matrix apposition rate, and may someday be an alternative as a material for dental implants.
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Affiliation(s)
- Xiaona Wang
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Department of Dental Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Xing Meng
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Department of Dental Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Shunli Chu
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Department of Dental Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Xingchen Xiang
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Department of Dental Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Zhenzhen Liu
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Department of Dental Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China
| | - Jinghui Zhao
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Department of Dental Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China.
| | - Yanmin Zhou
- Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling, Department of Dental Implantology, School and Hospital of Stomatology, Jilin University, Changchun, China.
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73
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Wyss F, Müller J, Clauss M, Kircher P, Geyer H, von Rechenberg B, Hatt JM. Measuring Rabbit (Oryctolagus cuniculus) Tooth Growth and Eruption by Fluorescence Markers and Bur Marks. J Vet Dent 2016; 33:39-46. [PMID: 27487654 DOI: 10.1177/0898756416640956] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Rabbits (Oryctolagus cuniculus) and rodents possess continuously growing teeth, and dental problems are a major health issue in these species. Knowledge of tooth growth characteristics is required to adequately treat dental problems and advise owners concerning diets. Most research was performed using bur marks and measuring eruption and wear manually. However, this method cannot be applied to teeth less rostral than the first premolar; therefore, for evaluation of molars, other methods are needed. We evaluated the use of fluorochromes xylenol orange and calcein green to measure growth rates of rabbit teeth and compared this method to results obtained by manually measuring the distance between a bur mark and the gingival margin of the same tooth (eruption) and by measuring the distance between the bur mark and the apex of the same tooth on computed tomography scans (growth). Apical fluorochrome measurements correlated well with eruption and growth rates obtained with bur marks, whereas measurements coronal to the pulp cavity did not. Growth rates were approximately 1.9 mm/wk for maxillary and 2.2 mm/wk for mandibular incisors. Growth rates of premolars were 2.14 ± 0.28 mm/wk in rabbits on a grass/rice hulls/sand pelleted diet and 0.93 ± 0.18 mm/wk in rabbits on a hay diet. Growth of molars could only be assessed using the measurement in dentin on the wall of the pulp cavity, which does not account for the real growth. However, being similar to this measurement in premolars, one could hypothesize similar growth in molars as in premolars. We conclude that the application of fluorochrome staining can be used to measure tooth growth in teeth that are not accessible for bur marks or in animals that are too small to assess tooth eruption or growth by bur marks.
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74
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In Vitro and In Vivo Evaluation of Tetracycline Loaded Chitosan-Gelatin Nanosphere Coatings for Titanium Surface Functionalization. Macromol Biosci 2016; 17. [DOI: 10.1002/mabi.201600130] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 08/02/2016] [Indexed: 11/07/2022]
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75
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Rajitha Gunaratne GD, Khan R, Fick D, Robertson B, Dahotre N, Ironside C. A review of the physiological and histological effects of laser osteotomy. J Med Eng Technol 2016; 41:1-12. [DOI: 10.1080/03091902.2016.1199743] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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76
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Ravanetti F, Chiesa R, Ossiprandi MC, Gazza F, Farina V, Martini FM, Di Lecce R, Gnudi G, Della Valle C, Gavini J, Cacchioli A. Osteogenic response and osteoprotective effects in vivo of a nanostructured titanium surface with antibacterial properties. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2016; 27:52. [PMID: 26787484 DOI: 10.1007/s10856-015-5661-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 12/28/2015] [Indexed: 06/05/2023]
Abstract
In implantology, as an alternative approach to the use of antibiotics, direct surface modifications of the implant addressed to inhibit bacterial adhesion and to limit bacterial proliferation are a promising tactic. The present study evaluates in an in vivo normal model the osteogenic response and the osteointegration of an anodic spark deposition nanostructured titanium surface doped with gallium (ASD + Ga) in comparison with two other surface treatments of titanium: an anodic spark deposition treatment without gallium (ASD) and an acid etching treatment (CTR). Moreover the study assesses the osteoprotective potential and the antibacterial effect of the previously mentioned surface treatments in an experimentally-induced peri-implantitis model. The obtained data points out a more rapid primary fixation in ASD and ASD + Ga implants, compared with CTR surface. Regarding the antibacterial properties, the ASD + Ga surface shows osteoprotective action on bone peri-implant tissue in vivo as well as an antibacterial effect within the first considered time point.
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Affiliation(s)
- F Ravanetti
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126, Parma, Italy.
| | - R Chiesa
- Department of Chemistry, Materials and Materials Engineering "G. Natta", Politecnico di Milano, Via Mancinelli 7, 20131, Milan, Italy
| | - M C Ossiprandi
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126, Parma, Italy
| | - F Gazza
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126, Parma, Italy
| | - V Farina
- Department of Veterinary Medicine, University of Sassari, Via Vienna 2, 07100, Sassari, Italy
| | - F M Martini
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126, Parma, Italy
| | - R Di Lecce
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126, Parma, Italy
| | - G Gnudi
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126, Parma, Italy
| | - C Della Valle
- Department of Chemistry, Materials and Materials Engineering "G. Natta", Politecnico di Milano, Via Mancinelli 7, 20131, Milan, Italy
| | - J Gavini
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126, Parma, Italy
| | - A Cacchioli
- Department of Veterinary Science, University of Parma, Via del Taglio 10, 43126, Parma, Italy
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77
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Mukherjee S, Nandi SK, Kundu B, Chanda A, Sen S, Das PK. Enhanced bone regeneration with carbon nanotube reinforced hydroxyapatite in animal model. J Mech Behav Biomed Mater 2016; 60:243-255. [PMID: 26907099 DOI: 10.1016/j.jmbbm.2016.02.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 02/01/2016] [Accepted: 02/03/2016] [Indexed: 11/17/2022]
Abstract
In order to improve the inherently poor mechanical properties of hydroxyapatite (HAp) and to increase its feasibility as load bearing implant material, in the present investigation, functionalised (HFC1 and HFC2) and non-functionalized (HC1 and HC2) multi-walled carbon nanotubes were used as reinforcing material with HAp. Significant improvement with respect to fracture toughness, flexural strength and impact strength of the composites was noticed. In vitro biological properties of HAp-carbon nanotube (CNT) biocomposites have also favored uniform and systematic apatite growth on their surface. Subsequently, in vivo osseous ingrowth at bone defect of rabbit femur was evaluated and compared using radiology, push out test, fluorochrome labeling, histology and scanning electron microscopy after 2 and 4 months respectively. The results demonstrated growth of web like soft callus from the host bone towards the implant, ensuring strong host bone interaction. Toxicological studies of the liver and kidney cells exhibited no abnormality, thereby confirming non-toxicity of the CNT in the animal body. Host-implant biomechanical strength showed high interfacial strength of the composites, indicating their high potentials to be used for bone remodeling applications.
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Affiliation(s)
- Susmita Mukherjee
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700032, India
| | - Samit Kumar Nandi
- Department of Veterinary Surgery and Radiology, West Bengal University of Animal and Fishery Sciences, Kolkata 700037, India.
| | - Biswanath Kundu
- Bioceramics and Coating Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India.
| | - Abhijit Chanda
- Department of Mechanical Engineering, Jadavpur University, Kolkata 700032, India
| | - Swarnendu Sen
- Department of Mechanical Engineering, Jadavpur University, Kolkata 700032, India
| | - Pradip Kumar Das
- Department of Veterinary Physiology, West Bengal University of Animal and Fishery Sciences, Kolkata 700037, India
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78
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Preclinical animal models of multiple myeloma. BONEKEY REPORTS 2016; 5:772. [PMID: 26909147 DOI: 10.1038/bonekey.2015.142] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 11/30/2015] [Indexed: 01/19/2023]
Abstract
Multiple myeloma is an incurable plasma-cell malignancy characterized by osteolytic bone disease and immunosuppression. Murine models of multiple myeloma and myeloma bone disease are critical tools for an improved understanding of the pathogenesis of the disease and the development of novel therapeutic strategies. This review will cover commonly used immunocompetent and xenograft models of myeloma, describing the advantages and disadvantages of each model system. In addition, this review provides detailed protocols for establishing systemic and local models of myeloma using both murine and human myeloma cell lines.
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79
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Ray S, Acharya R, Saha S, Islam A, Dey S, Nandi SK, Mandal TK, Banerjee G, Chakraborty J. Role of a nitrogenous bisphosphonate (local delivery) incorporated vitreous coating (with/without polymer) on surgical grade SS316L implant material to improve fixation at the damaged tissue site. RSC Adv 2016. [DOI: 10.1039/c6ra13155g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This study demonstrates the material and biological properties of a unique osteogenic drug eluting (local) coating on load bearing SS316L implant material with a tunable release profile.
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Affiliation(s)
- Sayantan Ray
- CSIR-Central Glass and Ceramic Research Institute
- Kolkata-700 032
- India
| | | | - Suman Saha
- CSIR-Central Glass and Ceramic Research Institute
- Kolkata-700 032
- India
| | - Amirul Islam
- West Bengal University of Animal and Fishery Sciences
- Kolkata-700 037
- India
| | - Sangeeta Dey
- CSIR-Central Glass and Ceramic Research Institute
- Kolkata-700 032
- India
| | - Samit Kumar Nandi
- West Bengal University of Animal and Fishery Sciences
- Kolkata-700 037
- India
| | - Tapan Kumar Mandal
- West Bengal University of Animal and Fishery Sciences
- Kolkata-700 037
- India
| | - Goutam Banerjee
- CSIR-Central Glass and Ceramic Research Institute
- Kolkata-700 032
- India
| | - Jui Chakraborty
- CSIR-Central Glass and Ceramic Research Institute
- Kolkata-700 032
- India
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80
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Song Y, Zheng J, Yan M, Ding W, Xu K, Fan Q, Li Z. The Effect of Irreversible Electroporation on the Femur: Experimental Study in a Rabbit Model. Sci Rep 2015; 5:18187. [PMID: 26655843 PMCID: PMC4674754 DOI: 10.1038/srep18187] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 11/12/2015] [Indexed: 12/18/2022] Open
Abstract
Irreversible electroporation (IRE) is a novel ablation method that has been tested in humans with lung, prostate, kidney, liver, lymph node and presacral cancers. As a new non-thermal treatment, the use of IRE to ablate tumors in the musculoskeletal system might reduce the incidence of fractures. We aimed to determine the ablation threshold of cortical bone and to evaluate the medium- and long-term healing process and mechanical properties of the femur in a rabbit model post-IRE ablation. The ablation threshold of cortical bone was between 1090 V/cm and 1310 V/cm (120 pulses). IRE-ablated femurs displayed no detectable fracture but did exhibit signs of recovery, including osteoblast regeneration, angiogenesis and bone remodeling. In the ablation area, revascularization appeared at 4 weeks post-IRE. Osteogenic activity peaked 8 weeks post-IRE and remained high at 12 weeks. The mechanical strength decreased briefly 4 weeks post-IRE but returned to normal levels within 8 weeks. Our experiment revealed that IRE ablation preserved the structural integrity of the bone cortex, and the ablated bone was able to regenerate rapidly. IRE may hold unique promise for in situ bone tissue ablation because rapid revascularization and active osteogenesis in the IRE ablation area are possible.
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Affiliation(s)
- Yue Song
- Department of Urologic and Pediatric Surgery, NO. 202 Hospital of People's Liberation Army, NO. 5 Guangrong Street, Shenyang, 110003, P.R.China.,Orthopedics Oncology Institute of Chinese People's Liberation Army and Department of Orthopedics, Tangdu Hospital, Fourth Military Medical University, NO. 1 Xinsi Road, Xi'an, 710038, P.R.China
| | - Jingjing Zheng
- Department of Anesthesiology, The General Hospital of Shenyang Military Command, NO. 83 Wenhua Road, Shenyang, 110840, P.R.China
| | - Mingwei Yan
- Department of Electrical Engineering, Xi'an Jiaotong University, NO. 28 Xianning Road, Xi'an, 710049, P.R.China
| | - Weidong Ding
- Department of Electrical Engineering, Xi'an Jiaotong University, NO. 28 Xianning Road, Xi'an, 710049, P.R.China
| | - Kui Xu
- Orthopedics Oncology Institute of Chinese People's Liberation Army and Department of Orthopedics, Tangdu Hospital, Fourth Military Medical University, NO. 1 Xinsi Road, Xi'an, 710038, P.R.China
| | - Qingyu Fan
- Orthopedics Oncology Institute of Chinese People's Liberation Army and Department of Orthopedics, Tangdu Hospital, Fourth Military Medical University, NO. 1 Xinsi Road, Xi'an, 710038, P.R.China
| | - Zhao Li
- Orthopedics Oncology Institute of Chinese People's Liberation Army and Department of Orthopedics, Tangdu Hospital, Fourth Military Medical University, NO. 1 Xinsi Road, Xi'an, 710038, P.R.China
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81
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Graded porous β-tricalcium phosphate scaffolds enhance bone regeneration in mandible augmentation. J Craniofac Surg 2015; 26:e148-53. [PMID: 25675019 PMCID: PMC4357553 DOI: 10.1097/scs.0000000000001383] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Bone augmentation requires scaffold to promote forming of natural bone structure. Currently, most of the reported bone scaffolds are porous solids with uniform pores. The aim of the currentstudy is to evaluate the effect of a graded porous β-tricalcium phosphate scaffolds on alveolar bone augmentation. Three groups of scaffolds were fabricated by a template-casting method: (1) graded porous scaffolds with large pores in the center and small pores at theperiphery, (2) scaffolds with large uniform pores, and (3) scaffolds with small uniform pores. Bone augmentation on rabbit mandible wasinvestigated by microcomputed tomography, sequential fluorescentlabeling, and histologic examination 3 months after implantation.The result presents that all the scaffold groups maintain their augmented bone height after 3-month observation, whereas the autograftinggroup presents an obvious bone resorption. Microcomputed tomography reveals that the graded porous group has significantly greater volume of new bone (P < 0.05) and similar bone density compared with the uniform pores groups. Bone substance distributes unevenly in all the 3 experimental groups. Greater bone volume can be observed in the area closer to the bone bed. The sequential fluorescentlabeling observation reveals robust bone regeneration in the first month and faster bone growth in the graded porous scaffold group than that in the large porous scaffold group. Histologic examinationsconfirm bone structure in the aspect of distribution, activity, and maturity. We conclude that graded porous designed biodegradableβ-tricalcium phosphate scaffolds are beneficial to promote bone augmentation in the aspect of bone volume.
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82
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Vahabzadeh S, Bandyopadhyay A, Bose S, Mandal R, Nandi SK. IGF-loaded silicon and zinc doped brushite cement: physico-mechanical characterization and in vivo osteogenesis evaluation. Integr Biol (Camb) 2015; 7:1561-73. [PMID: 26530147 DOI: 10.1039/c5ib00114e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dopants play critical roles in controlling the physical, mechanical, degradation kinetics, and in vivo properties of calcium phosphates. The aim of the present study was to evaluate the effects of silicon (Si) and zinc (Zn) dopants on the physico-mechanical and in vivo osteogenesis properties of brushite cements (BrCs) alone and in combination with insulin like growth factor 1 (IGF-1). Addition of 0.5 wt% Si did not alter the setting time, β-TCP content, and compressive strength of BrCs significantly; however, 0.25 wt% Zn incorporation was accompanied by a significant decrease in mechanical strength from 4.78 ± 0.21 MPa for pure BrC to 3.78 ± 0.59 MPa and 3.28 ± 0.22 MPa for Zn-BrC and Si/Zn-BrC, respectively. The in vivo bone regeneration properties of doped BrCs alone and in combination with IGF-1 were assessed and compared using chronological radiography, histology, scanning electron microscopy and fluorochrome labeling at 2 and 4 months post implantation in a rabbit femoral defect model. Based on in vivo characterization focusing on osteogenesis and vasculogenesis, Si-BrC and Si/Zn-BrC showed the best performance followed by Zn-BrC and pure BrCs. Addition of IGF-1 further improved bone regeneration. Our findings confirm that addition of Si and/or Zn alters the physico-mechanical properties of BrCs and promotes the early stage in vivo osseointegration and bone remodeling properties.
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Affiliation(s)
- Sahar Vahabzadeh
- W. M. Keck Biomedical Materials Research Laboratory, Department of Chemistry, School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, USA.
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Krishnan L, Priddy LB, Esancy C, Li MTA, Stevens HY, Jiang X, Tran L, Rowe DW, Guldberg RE. Hydrogel-based Delivery of rhBMP-2 Improves Healing of Large Bone Defects Compared With Autograft. Clin Orthop Relat Res 2015; 473:2885-97. [PMID: 25917422 PMCID: PMC4523508 DOI: 10.1007/s11999-015-4312-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Autologous bone grafting remains the gold standard in the treatment of large bone defects but is limited by tissue availability and donor site morbidity. Recombinant human bone morphogenetic protein-2 (rhBMP-2), delivered with a collagen sponge, is clinically used to treat large bone defects and complications such as delayed healing or nonunion. For the same dose of rhBMP-2, we have shown that a hybrid nanofiber mesh-alginate (NMA-rhBMP-2) delivery system provides longer-term release and increases functional bone regeneration in critically sized rat femoral bone defects compared with a collagen sponge. However, no comparisons of healing efficiencies have been made thus far between this hybrid delivery system and the gold standard of using autograft. QUESTIONS/PURPOSES We compared the efficacy of the NMA-rhBMP-2 hybrid delivery system to morselized autograft and hypothesized that the functional regeneration of large bone defects observed with sustained BMP delivery would be at least comparable to autograft treatment as measured by total bone volume and ex vivo mechanical properties. METHODS Bilateral critically sized femoral bone defects in rats were treated with either live autograft or with the NMA-rhBMP-2 hybrid delivery system such that each animal received one treatment per leg. Healing was monitored by radiography and histology at 2, 4, 8, and 12 weeks. Defects were evaluated for bone formation by longitudinal micro-CT scans over 12 weeks (n = 14 per group). The bone volume, bone density, and the total new bone formed beyond 2 weeks within the defect were calculated from micro-CT reconstructions and values compared for the 2-, 4-, 8-, and 12-week scans within and across the two treatment groups. Two animals were used for bone labeling with subcutaneously injected dyes at 4, 8, and 12 weeks followed by histology at 12 weeks to identify incremental new bone formation. Functional recovery was measured by ex vivo biomechanical testing (n = 9 per group). Maximum torque and torsional stiffness calculated from torsion testing of the femurs at 12 weeks were compared between the two groups. RESULTS The NMA-rhBMP-2 hybrid delivery system resulted in greater bone formation and improved biomechanical properties compared with autograft at 12 weeks. Comparing new bone volume within each group, the NMA-rhBMP-2-treated group had higher volume (p < 0.001) at 12 weeks (72.59 ± 18.34 mm(3)) compared with 8 weeks (54.90 ± 16.14) and 4 weeks (14.22 ± 9.59). The new bone volume was also higher at 8 weeks compared with 4 weeks (p < 0.001). The autograft group showed higher (p <0.05) new bone volume at 8 weeks (11.19 ± 8.59 mm(3)) and 12 weeks (14.64 ± 10.36) compared with 4 weeks (5.15 ± 4.90). Between groups, the NMA-rhBMP-2-treated group had higher (p < 0.001) new bone volume than the autograft group at both 8 and 12 weeks. Local mineralized matrix density in the NMA-rhBMP-2-treated group was lower than that of the autograft group at all time points (p < 0.001). Presence of nuclei within the lacunae of the autograft and early appositional bone formation seen in representative histology sections suggested that the bone grafts remained viable and were functionally engrafted within the defect. The bone label distribution from representative sections also revealed more diffuse mineralization in the defect in the NMA-rhBMP-2-treated group, whereas more localized distribution of new mineral was seen at the edges of the graft pieces in the autograft group. The NMA-rhBMP-2-treated group also revealed higher torsional stiffness (0.042 ± 0.019 versus 0.020 ± 0.022 N-m/°; p = 0.037) and higher maximum torque (0.270 ± 0.108 versus 0.125 ± 0.137 N-m; p = 0.024) compared with autograft. CONCLUSIONS The NMA-rhBMP-2 hybrid delivery system improved bone formation and restoration of biomechanical function of rat segmental bone defects compared with autograft treatment. CLINICAL RELEVANCE Delivery systems that allow prolonged availability of BMP may provide an effective clinical alternative to autograft treatment for repair of segmental bone defects. Future studies in a large animal model comparing mixed cortical-trabecular autograft and the NMA-rhBMP-2 hybrid delivery system are the next step toward clinical translation of this approach.
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Affiliation(s)
- Laxminarayanan Krishnan
- />Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332-0363 USA
| | - Lauren B. Priddy
- />Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332-0363 USA
- />Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology & Emory University, Atlanta, GA USA
| | - Camden Esancy
- />Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332-0363 USA
| | - Mon-Tzu Alice Li
- />Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332-0363 USA
- />Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology & Emory University, Atlanta, GA USA
- />Emory University, Atlanta, GA USA
| | - Hazel Y. Stevens
- />Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332-0363 USA
- />George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA USA
| | - Xi Jiang
- />University of Connecticut Health Center, Farmington, CT USA
| | | | - David W. Rowe
- />University of Connecticut Health Center, Farmington, CT USA
| | - Robert E. Guldberg
- />Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, 315 Ferst Drive, Atlanta, GA 30332-0363 USA
- />Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology & Emory University, Atlanta, GA USA
- />George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA USA
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84
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Loozen LD, van der Helm YJ, Öner FC, Dhert WJ, Kruyt MC, Alblas J. Bone Morphogenetic Protein-2 Nonviral Gene Therapy in a Goat Iliac Crest Model for Bone Formation. Tissue Eng Part A 2015; 21:1672-9. [DOI: 10.1089/ten.tea.2014.0593] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Loek D. Loozen
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | - F. Cumhur Öner
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Wouter J.A. Dhert
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
- Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Moyo C. Kruyt
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Jacqueline Alblas
- Department of Orthopaedics, University Medical Center Utrecht, Utrecht, The Netherlands
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85
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Mediero A, Wilder T, Perez-Aso M, Cronstein BN. Direct or indirect stimulation of adenosine A2A receptors enhances bone regeneration as well as bone morphogenetic protein-2. FASEB J 2015; 29:1577-90. [PMID: 25573752 PMCID: PMC4396602 DOI: 10.1096/fj.14-265066] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 12/10/2014] [Indexed: 12/11/2022]
Abstract
Promoting bone regeneration and repair of bone defects is a need that has not been well met to date. We have previously found that adenosine, acting via A2A receptors (A2AR) promotes wound healing and inhibits inflammatory osteolysis and hypothesized that A2AR might be a novel target to promote bone regeneration. Therefore, we determined whether direct A2AR stimulation or increasing endogenous adenosine concentrations via purine transport blockade with dipyridamole regulates bone formation. We determined whether coverage of a 3 mm trephine defect in a mouse skull with a collagen scaffold soaked in saline, bone morphogenetic protein-2 (BMP-2; 200 ng), 1 μM CGS21680 (A2AR agonist, EC50 = 160 nM), or 1 μM dipyridamole (EC50 = 32 nM) promoted bone regeneration. Microcomputed tomography examination demonstrated that CGS21680 and dipyridamole markedly enhanced bone regeneration as well as BMP-2 8 wk after surgery (60 ± 2%, 79 ± 2%, and 75 ± 1% bone regeneration, respectively, vs. 32 ± 2% in control, P < 0.001). Blockade by a selective A2AR antagonist (ZM241385, 1 μM) or deletion of A2AR abrogated the effect of CGS21680 and dipyridamole on bone regeneration. Both CGS21680 and dipyridamole treatment increased alkaline phosphatase-positive osteoblasts and diminished tartrate resistance acid phosphatase-positive osteoclasts in the defects. In vivo imaging with a fluorescent dye for new bone formation revealed a strong fluorescent signal in treated animals that was equivalent to BMP-2. In conclusion, stimulation of A2AR by specific agonists or by increasing endogenous adenosine levels stimulates new bone formation as well as BMP-2 and represents a novel approach to stimulating bone regeneration.
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Affiliation(s)
- Aránzazu Mediero
- Divisions of Translational Medicine and Rheumatology, Department of Medicine, New York University Langone Medical Center, New York, New York, USA
| | - Tuere Wilder
- Divisions of Translational Medicine and Rheumatology, Department of Medicine, New York University Langone Medical Center, New York, New York, USA
| | - Miguel Perez-Aso
- Divisions of Translational Medicine and Rheumatology, Department of Medicine, New York University Langone Medical Center, New York, New York, USA
| | - Bruce N Cronstein
- Divisions of Translational Medicine and Rheumatology, Department of Medicine, New York University Langone Medical Center, New York, New York, USA
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86
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Hsu FY, Lu MR, Weng RC, Lin HM. Hierarchically biomimetic scaffold of a collagen-mesoporous bioactive glass nanofiber composite for bone tissue engineering. ACTA ACUST UNITED AC 2015; 10:025007. [PMID: 25805665 DOI: 10.1088/1748-6041/10/2/025007] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Mesoporous bioactive glass nanofibers (MBGNFs) were prepared by a sol-gel/electrospinning technique. Subsequently, a collagen-MBGNF (CM) composite scaffold that simultaneously possessed a macroporous structure and collagen nanofibers was fabricated by a gelation and freeze-drying process. Additionally, immersing the CM scaffold in a simulated body fluid resulted in the formation of bone-like apatite minerals on the surface. The CM scaffold provided a suitable environment for attachment to the cytoskeleton. Based on the measured alkaline phosphatase activity and protein expression levels of osteocalcin and bone sialoprotein, the CM scaffold promoted the differentiation and mineralization of MG63 osteoblast-like cells. In addition, the bone regeneration ability of the CM scaffold was examined using a rat calvarial defect model in vivo. The results revealed that CM is biodegradable and could promote bone regeneration. Therefore, a CM composite scaffold is a potential bone graft for bone tissue engineering applications.
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Affiliation(s)
- Fu-Yin Hsu
- Department of Bioscience and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan
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87
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Müller CW, Hildebrandt K, Gerich T, Krettek C, van Griensven M, Rosado Balmayor E. BMP-2-transduced human bone marrow stem cells enhance neo-bone formation in a rat critical-sized femur defect. J Tissue Eng Regen Med 2015; 11:1122-1131. [PMID: 25783748 DOI: 10.1002/term.2015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 01/08/2015] [Accepted: 01/15/2015] [Indexed: 12/15/2022]
Abstract
Synthetic graft materials are considered as possible substitutes for cancellous bone, but lack osteogenic and osteoinductive properties. In this study, we investigated how composite scaffolds of βTCP containing osteogenic human bone marrow mesenchymal stem cells (hBMSCs) and osteoinductive bone morphogenetic protein-2 (BMP-2) influenced the process of fracture healing. hBMSCs were loaded into βTCP scaffolds 24 h before implantation in a rat critical-sized bone defect. hBMSCs were either stimulated with rhBMP-2 or transduced with BMP-2 by gene transfer. The effect of both protein stimulation and gene transfer was compared for osteogenic outcome. X-rays were conducted at weeks 0, 1, 3, 6, 9 and 12 post-operatively. In addition, bone-labelling fluorochromes were applied at 0, 3, 6 and 9 weeks. Histological analysis was performed for the amount of callus tissue and cartilage formation. At 6 weeks, the critical-sized defect in 33% of the rats treated with the Ad-BMP-2-transduced hBMSCs/βTCP scaffolds was radiographically bridged. In contrast, in only 10% of the rats treated with rhBMP2/hBMSCs, 12 weeks post-treatment, the bone defect was closed in all treated rats of the Ad-BMP-2 group except for one. Histology showed significantly higher amounts of callus formation in both Ad-BMP-2- and rhBMP-2-treated rats. The amount of neocartilage was less pronounced in both BMP-2-related groups. In summary, scaffolds with BMP-2-transduced hBMSCs performed better than those with the rhBMP2/hBMSCs protein. These results suggest that combinations of osteoconductive biomaterials with genetically modified MSCs capable of secreting osteoinductive proteins may represent a promising alternative for bone regeneration. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
| | | | - Torsten Gerich
- Department of Trauma Surgery, Centre Hospitalier de Luxembourg (CHL), Luxembourg
| | | | - Martijn van Griensven
- Department of Experimental Trauma Surgery, Klinikum Rechts der Isar, Technical University Munich, Germany
| | - Elizabeth Rosado Balmayor
- Department of Experimental Trauma Surgery, Klinikum Rechts der Isar, Technical University Munich, Germany
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88
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Gawlitta D, Benders KE, Visser J, van der Sar AS, Kempen DH, Theyse LF, Malda J, Dhert WJ. Decellularized Cartilage-Derived Matrix as Substrate for Endochondral Bone Regeneration. Tissue Eng Part A 2015; 21:694-703. [DOI: 10.1089/ten.tea.2014.0117] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Debby Gawlitta
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Kim E.M. Benders
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Jetze Visser
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | - Diederik H.R. Kempen
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Lars F.H. Theyse
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Jos Malda
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, The Netherlands
- Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Wouter J.A. Dhert
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, The Netherlands
- Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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89
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Hu B, Cai XZ, Shi ZL, Chen YL, Zhao X, Zhu HX, Yan SG. Microbubble injection enhances inhibition of low-intensity pulsed ultrasound on debris-induced periprosthetic osteolysis in rabbit model. ULTRASOUND IN MEDICINE & BIOLOGY 2015; 41:177-186. [PMID: 25438844 DOI: 10.1016/j.ultrasmedbio.2014.08.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 08/13/2014] [Accepted: 08/20/2014] [Indexed: 06/04/2023]
Abstract
We determined whether the addition of microbubbles enhances the effect of low-intensity pulsed ultrasound (LIPUS) on bone-implant integration in an early-stage osteolysis model. The bone canals were injected with titanium particles before implantation to establish the periprosthetic osteolysis model. Before ultrasonic therapy, the microbubble-enhanced LIPUS group (GTi-Us-Mb) received an intra-articular injection of microbubbles. Biomechanical testing revealed that GTi-Us-Mb had significantly greater fixation strength than the LIPUS group (GTi-Us). Distal periprosthetic bone mineral density was also higher in GTi-Us than in the Ti group (GTi), but no significant increase was detected after administration of microbubbles. Histomorphometric analyses revealed that bone formation around the implant in GTi-Us was enhanced by the addition of microbubbles in GTi-Us-Mb. Taken together, our data indicate that microbubble injection enhances the inhibitory effect of LIPUS on debris-induced osteolysis and further strengthens the mechanical fixation of implants in an early-stage osteolysis model in vivo.
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Affiliation(s)
- Bin Hu
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xun-Zi Cai
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China; Institute of Orthopedic Research, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zhong-Li Shi
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China; Institute of Orthopedic Research, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yun-Lin Chen
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xiang Zhao
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Han-Xiao Zhu
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Shi-Gui Yan
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China; Institute of Orthopedic Research, Zhejiang University, Hangzhou, Zhejiang, China.
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90
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Ventura M, Boerman OC, de Korte C, Rijpkema M, Heerschap A, Oosterwijk E, Jansen JA, Walboomers XF. Preclinical Imaging in Bone Tissue Engineering. TISSUE ENGINEERING PART B-REVIEWS 2014; 20:578-95. [DOI: 10.1089/ten.teb.2013.0635] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Manuela Ventura
- Department of Biomaterials, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Otto C. Boerman
- Department of Nuclear Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Chris de Korte
- Department of Radiology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Mark Rijpkema
- Department of Nuclear Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Arend Heerschap
- Department of Radiology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Egbert Oosterwijk
- Department of Urology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - John A. Jansen
- Department of Biomaterials, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - X. Frank Walboomers
- Department of Biomaterials, Radboud University Medical Centre, Nijmegen, The Netherlands
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91
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Visser J, Gawlitta D, Benders KEM, Toma SMH, Pouran B, van Weeren PR, Dhert WJA, Malda J. Endochondral bone formation in gelatin methacrylamide hydrogel with embedded cartilage-derived matrix particles. Biomaterials 2014; 37:174-82. [PMID: 25453948 DOI: 10.1016/j.biomaterials.2014.10.020] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Accepted: 10/02/2014] [Indexed: 12/26/2022]
Abstract
The natural process of endochondral bone formation in the growing skeletal system is increasingly inspiring the field of bone tissue engineering. However, in order to create relevant-size bone grafts, a cell carrier is required that ensures a high diffusion rate and facilitates matrix formation, balanced by its degradation. Therefore, we set out to engineer endochondral bone in gelatin methacrylamide (GelMA) hydrogels with embedded multipotent stromal cells (MSCs) and cartilage-derived matrix (CDM) particles. CDM particles were found to stimulate the formation of a cartilage template by MSCs in the GelMA hydrogel in vitro. In a subcutaneous rat model, this template was subsequently remodeled into mineralized bone tissue, including bone-marrow cavities. The GelMA was almost fully degraded during this process. There was no significant difference in the degree of calcification in GelMA with or without CDM particles: 42.5 ± 2.5% vs. 39.5 ± 8.3% (mean ± standard deviation), respectively. Interestingly, in an osteochondral setting, the presence of chondrocytes in one half of the constructs fully impeded bone formation in the other half by MSCs. This work offers a new avenue for the engineering of relevant-size bone grafts, by the formation of endochondral bone within a degradable hydrogel.
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Affiliation(s)
- Jetze Visser
- Department of Orthopaedics, University Medical Center Utrecht, Heidelberglaan 100, 3508 GA Utrecht, The Netherlands
| | - Debby Gawlitta
- Department of Orthopaedics, University Medical Center Utrecht, Heidelberglaan 100, 3508 GA Utrecht, The Netherlands; Department of Oral and Maxillofacial Surgery, University Medical Center Utrecht, Heidelberglaan 100, 3508 GA Utrecht, The Netherlands
| | - Kim E M Benders
- Department of Orthopaedics, University Medical Center Utrecht, Heidelberglaan 100, 3508 GA Utrecht, The Netherlands
| | - Selynda M H Toma
- Department of Orthopaedics, University Medical Center Utrecht, Heidelberglaan 100, 3508 GA Utrecht, The Netherlands
| | - Behdad Pouran
- Department of Orthopaedics, University Medical Center Utrecht, Heidelberglaan 100, 3508 GA Utrecht, The Netherlands; Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD Delft, The Netherlands
| | - P René van Weeren
- Department of Equine Sciences, Faculty of Veterinary Sciences, Utrecht University, Yalelaan 112, 3584 CM Utrecht, The Netherlands
| | - Wouter J A Dhert
- Department of Orthopaedics, University Medical Center Utrecht, Heidelberglaan 100, 3508 GA Utrecht, The Netherlands; Department of Equine Sciences, Faculty of Veterinary Sciences, Utrecht University, Yalelaan 112, 3584 CM Utrecht, The Netherlands
| | - Jos Malda
- Department of Orthopaedics, University Medical Center Utrecht, Heidelberglaan 100, 3508 GA Utrecht, The Netherlands; Department of Equine Sciences, Faculty of Veterinary Sciences, Utrecht University, Yalelaan 112, 3584 CM Utrecht, The Netherlands.
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92
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Effect of ovariectomy on stimulating intracortical remodeling in rats. BIOMED RESEARCH INTERNATIONAL 2014; 2014:421431. [PMID: 25309912 PMCID: PMC4189761 DOI: 10.1155/2014/421431] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 08/29/2014] [Accepted: 09/05/2014] [Indexed: 11/18/2022]
Abstract
OBJECTIVE Technically primates and dogs represent ideal models to investigate diseases characterized by abnormal intracortical remodeling. High expenses and ethical issues, however, restrict the use of those animals in research. Rodent models have been used as alternatives instead, but their value is limited, if none, because these animals lack intracortical bone remodeling. This study aimed at investigating the effect of ovariectomy onto the stimulation of intracortical remodeling in rat mandibles. MATERIALS AND METHODS Sixteen 12-week-old Spraque-Dawly (SD) female rats were randomly assigned into two groups, receiving either ovariectomy or sham operation. All the rats were sacrificed 18 weeks postoperatively. The entire mandibles were harvested for microcomputed tomography (micro-CT) and histomorphometric assessments. RESULTS Micro-CT examination showed significantly decreased bone mineral density (0.95 ± 0.01 versus 1.01 ± 0.02 g/cm(3), P < 0.001) and bone volume (65.78 ± 5.45 versus 87.41 ± 4.12%, P < 0.001) in ovariectomy group. Histomorphometric assessment detected a sixfold increased intracortical bone remodeling as well as an increased bone modeling in mandibles of ovariectomized rats. CONCLUSION For the first time, to the authors' knowledge, it was detected that ovariectomy stimulates intracortical remodeling in rat mandibles. This animal model might be of use to study various bone diseases associated with an abnormal intracortical remodeling process.
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93
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The longitudinal assessment of osteomyelitis development by molecular imaging in a rabbit model. BIOMED RESEARCH INTERNATIONAL 2014; 2014:424652. [PMID: 25295260 PMCID: PMC4177738 DOI: 10.1155/2014/424652] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 08/22/2014] [Indexed: 01/28/2023]
Abstract
INTRODUCTION Osteomyelitis is a severe orthopaedic complication which is difficult to diagnose and treat. Previous experimental studies mainly focussed on evaluating osteomyelitis in the presence of an implant or used a sclerosing agent to promote infection onset. In contrast, we focused on the longitudinal assessment of a nonimplant related osteomyelitis. METHODS An intramedullary tibial infection with S. aureus was established in NZW rabbits. Clinical and haematological infection status was evaluated weekly, combined with X-ray radiographs, biweekly injections of calcium binding fluorophores, and postmortem micro-CT. The development of the infection was assessed by micro-PET at consecutive time points using 18F-FDG as an infection tracer. RESULTS The intramedullary contamination of the rabbit tibia resulted in an osteomyelitis. Haematological parameters confirmed infection in mainly the first postoperative weeks (CRP at the first 5 postoperative weeks, leucocyte differentiation at the second and sixth postoperative weeks, and ESR on the second postoperative week only), while micro-PET was able to detect the infection from the first post-operative week onward until the end of the study. CONCLUSIONS This study shows that osteomyelitis in the rabbit can be induced without use of an implant or sclerosing agent. The sequential follow-up indicates that the diagnostic value of each infection parameter is time point dependant. Furthermore, from all parameters used, the diagnostic value of 18F-FDG micro-PET is the most versatile to assess the presence of an orthopaedic infection in this model.
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94
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Qiao Y, Zhang W, Tian P, Meng F, Zhu H, Jiang X, Liu X, Chu PK. Stimulation of bone growth following zinc incorporation into biomaterials. Biomaterials 2014; 35:6882-97. [DOI: 10.1016/j.biomaterials.2014.04.101] [Citation(s) in RCA: 204] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 04/28/2014] [Indexed: 01/23/2023]
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95
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Sununliganon L, Peng L, Singhatanadgit W, Cheung LK. Osteogenic efficacy of bone marrow concentrate in rabbit maxillary sinus grafting. J Craniomaxillofac Surg 2014; 42:1753-65. [PMID: 25052732 DOI: 10.1016/j.jcms.2014.06.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Revised: 04/29/2014] [Accepted: 06/05/2014] [Indexed: 12/23/2022] Open
Abstract
Maxillary sinus grafting is required to increase bone volume in the atrophic posterior maxilla to facilitate dental implant placement. Grafting with autogenous bone (AB) is ideal, but additional bone harvesting surgery is unpleasant. Alternatively, bone substitutes have been used but they limit new bone formation. The strategy of single-visit clinical stem cell therapy using bone marrow aspirate concentrate (BMAC) to facilitate new bone formation has been proposed. This study aimed to assess bone regeneration capacity of autologous BMAC mixed with bovine bone mineral (BBM) in maxillary sinus grafting. Twenty-four white New Zealand rabbits were used and their maxillary sinuses were randomly assigned for grafting with 4 different materials. Rates of new bone apposition in augmented sinuses were measured and bone histomorphometry were examined. Significant increase in the quantity of nucleated cells and colony forming unit-fibroblasts were confirmed in BMAC. Mesenchymal stem cells in BMAC retained their in vitro multi-differentiation capability. Higher rates of mineral appositions in the early period were detected in BBM + BMAC and AB than BBM alone, though they are not significantly different. Graft volume/tissue volumes in BBM and BBM + BMAC were found to be higher than those in AB and sham.
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Affiliation(s)
- L Sununliganon
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, China; Faculty of Dentistry, Thammasat University, Thailand
| | - L Peng
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, China
| | | | - L K Cheung
- Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, China.
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96
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Katunar MR, Gomez Sanchez A, Ballarre J, Baca M, Vottola C, Orellano JC, Schell H, Duffo G, Cere S. Can anodised zirconium implants stimulate bone formation? Preliminary study in rat model. Prog Biomater 2014; 3:24. [PMID: 29470722 PMCID: PMC5151104 DOI: 10.1007/s40204-014-0024-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 05/27/2014] [Indexed: 12/26/2022] Open
Abstract
The mechanical properties and good biocompatibility of zirconium and some of its alloys make these materials good candidates for biomedical applications. The attractive in vivo performance of zirconium is mainly due to the presence of a protective oxide layer. In this preliminary study, the surface of pure zirconium modified by anodisation in acidic media at low potentials to enhance its barrier protection given by the oxides and osseointegration. Bare, commercially pure zirconium cylinders were compared to samples anodised at 30 V through electrochemical tests and scanning electron microscopy (SEM). For both conditions, in vivo tests were performed in a rat tibial osteotomy model. The histological features and fluorochrome-labelling changes of newly bone formed around the implants were evaluated on the non-decalcified sections 63 days after surgery. Electrochemical tests and SEM images show that the anodisation treatment increases the barrier effect over the material and the in vivo tests show continuous newly formed bone around the implant with a different amount of osteocytes in their lacunae depending on the region. There was no significant change in bone thickness around either kind of implant but the anodised samples had a significantly higher mineral apposition, suggesting that the anodisation treatment stimulates and assists the osseointegration process. We conclude that anodisation treatment at 30 V can stimulate the implant fixation in a rat model, making zirconium a strong candidate material for permanent implants.
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Affiliation(s)
- Maria R Katunar
- Corrosion Division, INTEMA, Universidad Nacional de Mar del Plata-CONICET, Juan B. Justo 4302, B7608FDQ, Mar del Plata, Argentina.
| | - Andrea Gomez Sanchez
- Corrosion Division, INTEMA, Universidad Nacional de Mar del Plata-CONICET, Juan B. Justo 4302, B7608FDQ, Mar del Plata, Argentina
| | - Josefina Ballarre
- Corrosion Division, INTEMA, Universidad Nacional de Mar del Plata-CONICET, Juan B. Justo 4302, B7608FDQ, Mar del Plata, Argentina
| | - Matias Baca
- Traumatologia y Ortopedia, Hospital Interzonal General de Agudos "Oscar Alende", Mar del Plata, Argentina
| | - Carlos Vottola
- Traumatologia y Ortopedia, Hospital Interzonal General de Agudos "Oscar Alende", Mar del Plata, Argentina
| | - Juan C Orellano
- Traumatologia y Ortopedia, Hospital Interzonal General de Agudos "Oscar Alende", Mar del Plata, Argentina
| | - Hanna Schell
- Center of Muskuloeskeletal Surgery, Charite-Universitätsmedizin Berlin, Augustenburger Plats 1, D-13353, Berlin, Germany
| | - Gustavo Duffo
- Departamento de Materiales, Comisión Nacional de Energía Atómica, CONICET, Av. Gral. Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
- Universidad Nacional de Gral. San Martín, Av. Gral. Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
| | - Silvia Cere
- Corrosion Division, INTEMA, Universidad Nacional de Mar del Plata-CONICET, Juan B. Justo 4302, B7608FDQ, Mar del Plata, Argentina
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97
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Alghamdi HS, van den Beucken JJ, Jansen JA. Osteoporotic Rat Models for Evaluation of Osseointegration of Bone Implants. Tissue Eng Part C Methods 2014; 20:493-505. [DOI: 10.1089/ten.tec.2013.0327] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Affiliation(s)
- Hamdan S. Alghamdi
- Department of Biomaterials, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | | | - John A. Jansen
- Department of Biomaterials, Radboud University Medical Center, Nijmegen, The Netherlands
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98
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Guda T, Labella C, Chan R, Hale R. Quality of bone healing: Perspectives and assessment techniques. Wound Repair Regen 2014; 22 Suppl 1:39-49. [DOI: 10.1111/wrr.12167] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 01/28/2014] [Indexed: 11/30/2022]
Affiliation(s)
- Teja Guda
- Dental Trauma Research Detachment; US Army Institute of Surgical Research; Fort Sam Houston
- Wake Forest Institute for Regenerative Medicine; Winston-Salem North Carolina
- Biomedical Engineering; University of Texas at San Antonio; San Antonio Texas
| | - Carl Labella
- Dental Trauma Research Detachment; US Army Institute of Surgical Research; Fort Sam Houston
| | - Rodney Chan
- Dental Trauma Research Detachment; US Army Institute of Surgical Research; Fort Sam Houston
| | - Robert Hale
- Dental Trauma Research Detachment; US Army Institute of Surgical Research; Fort Sam Houston
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99
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Liedert A, Schinke T, Ignatius A, Amling M. The role of midkine in skeletal remodelling. Br J Pharmacol 2014; 171:870-8. [PMID: 24102259 PMCID: PMC3925025 DOI: 10.1111/bph.12412] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 09/02/2013] [Accepted: 09/09/2013] [Indexed: 12/13/2022] Open
Abstract
UNLABELLED Bone tissue is subjected to continuous remodelling, replacing old or damaged bone throughout life. In bone remodelling, the coordinated activities of bone-forming osteoblasts and bone-resorbing osteoclasts ensure the maintenance of bone mass and strength. In early life, the balance of these cellular activities is tightly regulated by various factors, including systemic hormones, the mechanical environment and locally released growth factors. Age-related changes in the activity of these factors in bone remodelling can result in diseases with low bone mass, such as osteoporosis. Osteoporosis is a systemic and age-related skeletal disease characterized by low bone mass and structural degeneration of bone tissue, predisposing the patient to an increased fracture risk. The growth factor midkine (Mdk) plays a key role in bone remodelling and it is expressed during bone formation and fracture repair. Using a mouse deficient in Mdk, our group have identified this protein as a negative regulator of bone formation and mechanically induced bone remodelling. Thus, specific Mdk antagonists might represent a therapeutic option for diseases characterized by low bone mass, such as osteoporosis. LINKED ARTICLES This article is part of a themed section on Midkine. To view the other articles in this section visit http://dx.doi.org/10.1111/bph.2014.171.issue-4.
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Affiliation(s)
- A Liedert
- Institute of Orthopedic Research and Biomechanics, Center of Musculoskeletal Research, University of Ulm, Ulm, Germany
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100
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Kim WS. The principles of tissue engineering and its recent advances and future prospects. JOURNAL OF THE KOREAN MEDICAL ASSOCIATION 2014. [DOI: 10.5124/jkma.2014.57.2.145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Woo Seob Kim
- Department of Plastic Surgery, Chung-Ang University College of Medicine, Seoul, Korea
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