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Dobson LK, Zeitouni S, McNeill EP, Bearden RN, Gregory CA, Saunders WB. Canine Mesenchymal Stromal Cell-Mediated Bone Regeneration is Enhanced in the Presence of Sub-Therapeutic Concentrations of BMP-2 in a Murine Calvarial Defect Model. Front Bioeng Biotechnol 2021; 9:764703. [PMID: 34796168 PMCID: PMC8592971 DOI: 10.3389/fbioe.2021.764703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 09/27/2021] [Indexed: 11/15/2022] Open
Abstract
Novel bone regeneration strategies often show promise in rodent models yet are unable to successfully translate to clinical therapy. Sheep, goats, and dogs are used as translational models in preparation for human clinical trials. While human MSCs (hMSCs) undergo osteogenesis in response to well-defined protocols, canine MSCs (cMSCs) are more incompletely characterized. Prior work suggests that cMSCs require additional agonists such as IGF-1, NELL-1, or BMP-2 to undergo robust osteogenic differentiation in vitro. When compared directly to hMSCs, cMSCs perform poorly in vivo. Thus, from both mechanistic and clinical perspectives, cMSC and hMSC-mediated bone regeneration may differ. The objectives of this study were twofold. The first was to determine if previous in vitro findings regarding cMSC osteogenesis were substantiated in vivo using an established murine calvarial defect model. The second was to assess in vitro ALP activity and endogenous BMP-2 gene expression in both canine and human MSCs. Calvarial defects (4 mm) were treated with cMSCs, sub-therapeutic BMP-2, or the combination of cMSCs and sub-therapeutic BMP-2. At 28 days, while there was increased healing in defects treated with cMSCs, defects treated with cMSCs and BMP-2 exhibited the greatest degree of bone healing as determined by quantitative μCT and histology. Using species-specific qPCR, cMSCs were not detected in relevant numbers 10 days after implantation, suggesting that bone healing was mediated by anabolic cMSC or ECM-driven cues and not via engraftment of cMSCs. In support of this finding, defects treated with cMSC + BMP-2 exhibited robust deposition of Collagens I, III, and VI using immunofluorescence. Importantly, cMSCs exhibited minimal ALP activity unless cultured in the presence of BMP-2 and did not express endogenous canine BMP-2 under any condition. In contrast, human MSCs exhibited robust ALP activity in all conditions and expressed human BMP-2 when cultured in control and osteoinduction media. This is the first in vivo study in support of previous in vitro findings regarding cMSC osteogenesis, namely that cMSCs require additional agonists to initiate robust osteogenesis. These findings are highly relevant to translational cell-based bone healing studies and represent an important finding for the field of canine MSC-mediated bone regeneration.
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Affiliation(s)
- Lauren K Dobson
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
| | - Suzanne Zeitouni
- Department of Molecular and Cellular Medicine, Institute for Regenerative Medicine, Texas A&M Health Science Center, College Station, TX, United States
| | - Eoin P McNeill
- Department of Molecular and Cellular Medicine, Institute for Regenerative Medicine, Texas A&M Health Science Center, College Station, TX, United States
| | - Robert N Bearden
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
| | - Carl A Gregory
- Department of Molecular and Cellular Medicine, Institute for Regenerative Medicine, Texas A&M Health Science Center, College Station, TX, United States
| | - W Brian Saunders
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
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Chen CH, Hsu EL, Stupp SI. Supramolecular self-assembling peptides to deliver bone morphogenetic proteins for skeletal regeneration. Bone 2020; 141:115565. [PMID: 32745692 PMCID: PMC7680412 DOI: 10.1016/j.bone.2020.115565] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 07/27/2020] [Accepted: 07/29/2020] [Indexed: 12/15/2022]
Abstract
Recombinant human bone morphogenetic proteins (BMPs) have shown clinical success in promoting bone healing, but they are also associated with unwanted side effects. The development of improved BMP carriers that can retain BMP at the defect site and maximize its efficacy would decrease the therapeutic BMP dose and thus improve its safety profile. In this review, we discuss the advantages of using self-assembling peptides, a class of synthetic supramolecular biomaterials, to deliver recombinant BMPs. Peptide amphiphiles (PAs) are a broad class of self-assembling peptides, and the use of PAs for BMP delivery and bone regeneration has been explored extensively over the past decade. Like many self-assembling peptide systems, PAs can be designed to form nanofibrous supramolecular biomaterials in which molecules are held together by non-covalent bonds. Chemical and biological functionality can be added to PA nanofibers, through conjugation of chemical moieties or biological epitopes to PA molecules. For example, PA nanofibers have been designed to bind heparan sulfate, a natural polysaccharide that is known to bind BMPs and potentiate their signal. Alternatively, PA nanofibers have been designed to synthetically mimic the structure and function of heparan sulfate, or to directly bind BMP specifically. In small animal models, these bio-inspired PA materials have shown the capacity to promote bone regeneration using BMP at doses 10-100 times lower than established therapeutic doses. These promising results have motivated further evaluation of PAs in large animal models, where their safety and efficacy must be established before clinical translation. We conclude with a discussion on the possiblity of combining PAs with other materials used in orthopaedic surgery to maximize their utility for clinical translation.
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Affiliation(s)
- Charlotte H Chen
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, IL 60611, USA; Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA
| | - Erin L Hsu
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, IL 60611, USA; Department of Orthopaedic Surgery, Northwestern University, 676 North St. Clair Street, Chicago, IL 60611, USA
| | - Samuel I Stupp
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, IL 60611, USA; Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA; Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA; Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA; Department of Medicine, Northwestern University, 676 North St. Clair Street, Chicago, IL 60611, USA.
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Reply: Demineralized Bone Matrix and Resorbable Mesh Bilaminate Cranioplasty Is Ineffective for Secondary Reconstruction of Large Pediatric Cranial Defects. Plast Reconstr Surg 2020; 146:378e. [PMID: 32496370 DOI: 10.1097/prs.0000000000007132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Liu S, Liu Y, Jiang L, Li Z, Lee S, Liu C, Wang J, Zhang J. Recombinant human BMP-2 accelerates the migration of bone marrow mesenchymal stem cells via the CDC42/PAK1/LIMK1 pathway in vitro and in vivo. Biomater Sci 2019; 7:362-372. [PMID: 30484785 DOI: 10.1039/c8bm00846a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Biomaterials are widely used for bone regeneration and fracture repair. The migration of bone marrow mesenchymal stem cells (BMSCs) into bone defect sites or material implantation sites, and their differentiation into osteoblasts, is central to the fracture healing process, and the directional migration of BMSCs depends on cytokines or chemokines at the defect site. BMP-2 can stimulate the migration of a variety of cells, but it remains unclear whether BMSC migration can be induced. To provide evidence for BMP-2-induced BMSC migration, we tested the cytoskeletal changes and migration ability of BMSCs after treatment with recombinant human BMP-2 (rhBMP-2). We also explored the recruitment of BMSCs from the circulatory system using a collagen sponge incorporating rhBMP-2 that was implanted in vivo. Furthermore, to understand the mechanism underlying this migration, we investigated the effect of rhBMP-2 on migration-related signal pathways. Here, we found that, rhBMP-2 treatment significantly increased the migration of BMSCs in vitro via activation of the CDC42/PAK1/LIMK1 pathway, and that this migration could be blocked by silencing CDC42. In vivo, collagen sponge material loaded with rhBMP-2 could recruit BMSCs injected into the circulatory system. Moreover, inhibition using the small interfering RNA for CDC42 led to a significant decrease in the number of BMSCs within the material. In conclusion, our data prove that rhBMP-2 can accelerate BMSC migration via the CDC42/PAK1/LIMK1 pathway both in vivo and in vitro, and therefore provides a foundation for further understanding and application of rhBMP-2-incorporated materials by enhancing BMSC recruitment.
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Affiliation(s)
- Shuhao Liu
- Department of Orthopedic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200030 People's Republic of China.
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Howie RN, Durham E, Oakes B, Grey Z, Smith J, Campbell P, LaRue A, Steed M, Muise-Helmericks R, Cray J. Testing a novel nanofibre scaffold for utility in bone tissue regeneration. J Tissue Eng Regen Med 2018; 12:2055-2066. [PMID: 30058251 DOI: 10.1002/term.2740] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 07/11/2018] [Accepted: 07/12/2018] [Indexed: 12/20/2022]
Abstract
Many variables serve to alter the process of bone remodelling and diminish regeneration including the size and nature of the wound bed and health status of the individual. To overcome these inhibitory factors, tissue-engineered osteoconductive scaffolds paired with various growth factors have been utilized clinically. However, many limitations still remain, for example, bone morphogenetic protein 2 (BMP2) can lead to rampant inflammation, ectopic bone formation, and graft failure. Here, we studied the ability for a nanofiber scaffold (Talymed) to accelerate BMP2 growth factor-induced bone healing compared with the traditional absorbable collagen sponge (ACS) delivery system. One hundred fifty-five adult wild type mice were arranged in 16 groups by time, 4 and 8 weeks, and treatment, ACS or Talymed, loaded with control, low, medium, or high dosages of BMP2. Skulls were subjected to microCT, biomechanical, and histological analysis to assess bone regeneration. The use of Talymed within the defect site was found to decrease the bone volume, bone formation rate, and alkaline phosphatase activity compared with ACS/BMP2 combinations. Interestingly, though Talymed regenerated less bone, the regenerate was found to have a greater hardness value than that of bone within the ACS groups. However, the difference in bone hardness between scaffolds was not detectable by 8 weeks. Based on these results, we found that the nanofiber scaffold generated a better quality of bone regenerate at 4 weeks but, due to the lack of overall bone formation and the inhibition of normal remodelling processes, was not as efficacious as the current clinical standard ACS/BMP2 therapy.
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Affiliation(s)
- R Nicole Howie
- Department of Oral Health Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Emily Durham
- Department of Oral Health Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Brayden Oakes
- College of Dental Medicine, Medical University of South Carolina, Charleston, South Carolina
| | - Zachary Grey
- Department of Oral Health Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Jason Smith
- Engineering Reseacher Accelerated and Integrated Innovation Institute, Carnegie Mellon University, Pittsburgh, Pennsylvania
| | - Phil Campbell
- Institute for Complex Engineering Systems, Carnegie Mellon University, Pittsburgh, Pennsylvania
| | - Amanda LaRue
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, and Ralph H. Johnston Department of Veterans Affairs, Charleston, South Carolina
| | - Martin Steed
- Department of Oral and Maxillofacial Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Robin Muise-Helmericks
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, South Carolina
| | - James Cray
- Division of Anatomy, College of Medicine, The Ohio State University, Columbus, Ohio
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Nakamura T, Shirakata Y, Shinohara Y, Miron RJ, Hasegawa-Nakamura K, Fujioka-Kobayashi M, Noguchi K. Comparison of the effects of recombinant human bone morphogenetic protein-2 and -9 on bone formation in rat calvarial critical-size defects. Clin Oral Investig 2017; 21:2671-2679. [PMID: 28197731 DOI: 10.1007/s00784-017-2069-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 01/31/2017] [Indexed: 02/06/2023]
Abstract
OBJECTIVES Among bone morphogenetic protein (BMP) family members, BMP-2 and BMP-9 have demonstrated potent osteoinductive potential. However, in vivo differences in their potential for bone regeneration remain unclear. The present study aimed to compare the effects of recombinant human (rh) BMP-2 and rhBMP-9 on bone formation in rat calvarial critical-size defects (CSD). MATERIALS AND METHODS Twenty-eight Wistar rats surgically received two calvarial defects bilaterally in each parietal bone. Defects (n = 56) were allocated into four groups: absorbable collagen sponge (ACS) alone, rhBMP-2 with ACS (rhBMP-2/ACS), rhBMP-9/ACS, or sham surgery (control), on the condition that the treatments of rhBMP-2/ACS and rhBMP-9/ACS, or the same treatments were not included in the same animal. Animals were sacrificed at 2 and 8 weeks post-surgery. The calvarial defects were analyzed for bone volume (BV) by micro-computed tomography and for percentages of defect closure (DC/DL), newly formed bone area (NBA/TA), bone marrow area (BMA/NBA), adipose tissue area (ATA/NBA), central bone height (CBH), and marginal bone height (MBH) by histomorphometric analysis. RESULTS The BV in the rhBMP-2/ACS group (5.44 ± 3.65 mm3, n = 7) was greater than the other groups at 2 weeks post-surgery, and the rhBMP-2/ACS and rhBMP-9/ACS groups (18.17 ± 2.51 and 16.30 ± 2.46 mm3, n = 7, respectively) demonstrated significantly greater amounts of BV compared with the control and ACS groups (6.02 ± 2.90 and 9.30 ± 2.75 mm3, n = 7, respectively) at 8 weeks post-surgery. The rhBMP-2/ACS and rhBMP-9/ACS groups significantly induced new bone formation compared to the control and ACS groups at 8 weeks post-surgery. However, there were no statistically significant differences found between the rhBMP-2/ACS and rhBMP-9/ACS groups in any of the histomorphometric parameters. The ATA/NBA in the rhBMP-2/ACS group (9.24 ± 3.72%, n = 7) was the highest among the treatment groups at 8 weeks post-surgery. CONCLUSIONS Within the limits of this study, it can be concluded that rhBMP-2/ACS induced a slight early increase in new bone formation at 2 weeks and that rhBMP-9/ACS provided comparable new bone formation to rhBMP-2/ACS with less adipose tissues after a healing period of 8 weeks in rat CSD. CLINICAL RELEVANCE RhBMP-9/ACS treatment provided new bone formation with less adipose tissues compared with rhBMP-2/ACS.
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Affiliation(s)
- Toshiaki Nakamura
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Yoshinori Shirakata
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Yukiya Shinohara
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Richard J Miron
- Department of Periodontology, Nova Southeastern University, Fort Lauderdale, FL, USA
| | - Kozue Hasegawa-Nakamura
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan
| | - Masako Fujioka-Kobayashi
- Department of Cranio-Maxillofacial Surgery, Bern University Hospital, Inselspital, Bern, Switzerland.,Department of Oral Surgery, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Kazuyuki Noguchi
- Department of Periodontology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 890-8544, Japan.
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Jeong WH, Roh TS, Kim YS, Kang EH, Jung BK, Lee WJ, Lew DH, Yun IS. Acceleration of osteogenesis by platelet-rich plasma with acellular dermal matrix in a calvarial defect model. Childs Nerv Syst 2016; 32:1653-9. [PMID: 27444291 DOI: 10.1007/s00381-016-3150-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 06/12/2016] [Indexed: 12/26/2022]
Abstract
PURPOSE The effects of platelet-rich plasma (PRP) on improvement of bone regeneration have been widely investigated. However, use of a proper scaffold is also important to the delivery of bioactive materials. The aim of this study was to analyze the effects of PRP with acellular dermal matrix (ADM) as a bone substitute in a cranial defect model. METHODS Twenty-nine New Zealand white rabbits were randomly divided into four groups including control, PRP, ADM, and PRP with ADM. A 15 × 15-mm(2) bony defect was carefully created in the cranium. The experimental materials were applied in each group. After 16 weeks, the volume and surface area of new bone were measured using three-dimensional computed tomography and digital photography, and the new bone was analyzed histologically. RESULTS The PRP with ADM group exhibited a statistically significant increase in volume and surface area of newly formed bone compared with the other groups (p < 0.05). Histological findings revealed compact lamellar bone in the PRP with ADM group. In contrast, scattered bone islands were detected within the fibrous connective tissue in the other groups. CONCLUSIONS The regeneration of mature and augmented bone was achieved following the application of PRP mixed with ADM. The results indicated that the PRP combined with ADM could be a potentially useful substitute for bone and may aid in the elimination of additional donor-site harvest procedures.
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Affiliation(s)
- Woon Hyeok Jeong
- Department of Plastic and Reconstructive Surgery, Keimyung University School of Medicine, Dongsan Medical Center, Daegu, Korea
| | - Tai Suk Roh
- Department of Plastic and Reconstructive Surgery, Institute for Human Tissue Restoration, Yonsei University Health System, Gangnam Severance Hospital, 211 Eonju-ro, Gangnam-gu, Seoul, 135-720, Korea
| | - Young Seok Kim
- Department of Plastic and Reconstructive Surgery, Institute for Human Tissue Restoration, Yonsei University Health System, Gangnam Severance Hospital, 211 Eonju-ro, Gangnam-gu, Seoul, 135-720, Korea
| | - Eun Hye Kang
- Department of Plastic and Reconstructive Surgery, Institute for Human Tissue Restoration, Yonsei University Health System, Severance Hospital, Seoul, Korea
| | - Bok Ki Jung
- Department of Plastic and Reconstructive Surgery, Institute for Human Tissue Restoration, Yonsei University Health System, Severance Hospital, Seoul, Korea
| | - Won Jai Lee
- Department of Plastic and Reconstructive Surgery, Institute for Human Tissue Restoration, Yonsei University Health System, Severance Hospital, Seoul, Korea
| | - Dae Hyun Lew
- Department of Plastic and Reconstructive Surgery, Institute for Human Tissue Restoration, Yonsei University Health System, Severance Hospital, Seoul, Korea
| | - In Sik Yun
- Department of Plastic and Reconstructive Surgery, Institute for Human Tissue Restoration, Yonsei University Health System, Gangnam Severance Hospital, 211 Eonju-ro, Gangnam-gu, Seoul, 135-720, Korea.
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Talley AD, McEnery MA, Kalpakci KN, Zienkiewicz KJ, Shimko DA, Guelcher SA. Remodeling of injectable, low-viscosity polymer/ceramic bone grafts in a sheep femoral defect model. J Biomed Mater Res B Appl Biomater 2016; 105:2333-2343. [PMID: 27507599 DOI: 10.1002/jbm.b.33767] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 07/03/2016] [Accepted: 07/23/2016] [Indexed: 01/20/2023]
Abstract
Ceramic/polymer composite bone grafts offer the potential advantage of combining the osteoconductivity of ceramic component with the ductility of polymeric component, resulting in a graft that meets many of the desired properties for bone void fillers (BVF). However, the relative contributions of the polymer and ceramic components to bone healing are not well understood. In this study, we compared remodeling of low-viscosity (LV) ceramic/poly(ester urethane) composites to a ceramic BVF control in a sheep femoral condyle plug defect model. LV composites incorporating either ceramic (LV/CM) or allograft bone (LV/A) particles were evaluated. We hypothesized that LV/CM composites which have the advantageous handling properties of injectability, flowability, and settability would heal comparably to the CM control, which was evaluated for up to 2 years to study its long-term degradation properties. Remodeling of LV/CM was comparable to that observed for the CM control, as evidenced by new bone formation on the surface of the ceramic particles. At early time points (4 months), LV/CM composites healed similar to the ceramic clinical control, while LV/A components showed more variable healing due to osteoclast-mediated resorption of the allograft particles. At longer time points (12-15 months), healing of LV/CM composites was more variable due to the nonhomogeneous distribution and lower concentration of the ceramic particles compared to the ceramic clinical control. Resorption of the ceramic particles was almost complete at 2 years. This study highlights the importance of optimizing the loading and distribution of ceramic particles in polymer/ceramic composites to maximize bone healing. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 2333-2343, 2017.
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Affiliation(s)
- Anne D Talley
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
| | - Madison A McEnery
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee
| | | | - Katarzyna J Zienkiewicz
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee
| | | | - Scott A Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee.,Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee.,Center for Bone Biology, Vanderbilt University Medical Center, Nashville, Tennessee
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Herberg S, Kondrikova G, Periyasamy-Thandavan S, Howie RN, Elsalanty ME, Weiss L, Campbell P, Hill WD, Cray JJ. Inkjet-based biopatterning of SDF-1β augments BMP-2-induced repair of critical size calvarial bone defects in mice. Bone 2014; 67:95-103. [PMID: 25016095 PMCID: PMC4149833 DOI: 10.1016/j.bone.2014.07.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 06/08/2014] [Accepted: 07/03/2014] [Indexed: 01/07/2023]
Abstract
BACKGROUND A major problem in craniofacial surgery is non-healing bone defects. Autologous reconstruction remains the standard of care for these cases. Bone morphogenetic protein-2 (BMP-2) therapy has proven its clinical utility, although non-targeted adverse events occur due to the high milligram-level doses used. Ongoing efforts explore the use of different growth factors, cytokines, or chemokines, as well as co-therapy to augment healing. METHODS Here we utilize inkjet-based biopatterning to load acellular DermaMatrix delivery matrices with nanogram-level doses of BMP-2, stromal cell-derived factor-1β (SDF-1β), transforming growth factor-β1 (TGF-β1), or co-therapies thereof. We tested the hypothesis that bioprinted SDF-1β co-delivery enhances BMP-2 and TGF-β1-driven osteogenesis both in-vitro and in-vivo using a mouse calvarial critical size defect (CSD) model. RESULTS Our data showed that BMP-2 bioprinted in low-doses induced significant new bone formation by four weeks post-operation. TGF-β1 was less effective compared to BMP-2, and SDF-1β therapy did not enhance osteogenesis above control levels. However, co-delivery of BMP-2+SDF-1β was shown to augment BMP-2-induced bone formation compared to BMP-2 alone. In contrast, co-delivery of TGF-β1+SDF-1β decreased bone healing compared to TGF-β1 alone. This was further confirmed in vitro by osteogenic differentiation studies using MC3T3-E1 pre-osteoblasts. CONCLUSIONS Our data indicates that sustained release delivery of a low-dose growth factor therapy using biopatterning technology can aid in healing CSD injuries. SDF-1β augments the ability for BMP-2 to drive healing, a result confirmed in vivo and in vitro; however, because SDF-1β is detrimental to TGF-β1-driven osteogenesis, its effect on osteogenesis is not universal.
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Affiliation(s)
- Samuel Herberg
- Department of Cellular Biology and Anatomy, Georgia Regents University, 1459 Laney Walker Blvd., Augusta, GA, USA
| | - Galina Kondrikova
- Department of Cellular Biology and Anatomy, Georgia Regents University, 1459 Laney Walker Blvd., Augusta, GA, USA
| | | | - R Nicole Howie
- Department of Oral Biology, Georgia Regents University, 1459 Laney Walker Blvd., Augusta, GA, USA
| | - Mohammed E Elsalanty
- Department of Oral Biology, Georgia Regents University, 1459 Laney Walker Blvd., Augusta, GA, USA; The Institute for Regenerative and Reparative Medicine, Georgia Regents University, 1459 Laney Walker Blvd., Augusta, GA, USA
| | - Lee Weiss
- The Robotics Institute, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA, USA; McGowan Institute for Regenerative Medicine, 450 Technology Drive, Pittsburgh, PA, USA
| | - Phil Campbell
- The Institute for Complex Engineered Systems, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA, USA; McGowan Institute for Regenerative Medicine, 450 Technology Drive, Pittsburgh, PA, USA
| | - William D Hill
- Department of Cellular Biology and Anatomy, Georgia Regents University, 1459 Laney Walker Blvd., Augusta, GA, USA; Department of Orthopaedic Surgery, Georgia Regents University, 1120 15th St., Augusta, GA, USA; The Institute for Regenerative and Reparative Medicine, Georgia Regents University, 1459 Laney Walker Blvd., Augusta, GA, USA; Charlie Norwood VA Medical Center, Augusta, GA, USA
| | - James J Cray
- Department of Cellular Biology and Anatomy, Georgia Regents University, 1459 Laney Walker Blvd., Augusta, GA, USA; Department of Oral Biology, Georgia Regents University, 1459 Laney Walker Blvd., Augusta, GA, USA; Department of Orthopaedic Surgery, Georgia Regents University, 1120 15th St., Augusta, GA, USA; Department of Orthodontics and Surgery, Division of Plastic Surgery, Georgia Regents University, 1120 15th St., Augusta, GA, USA; The Institute for Regenerative and Reparative Medicine, Georgia Regents University, 1459 Laney Walker Blvd., Augusta, GA, USA.
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Sustained delivery of rhBMP-2 by means of poly(lactic-co-glycolic acid) microspheres: cranial bone regeneration without heterotopic ossification or craniosynostosis. Plast Reconstr Surg 2014; 134:51-59. [PMID: 24622573 DOI: 10.1097/prs.0000000000000287] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Commercially available recombinant human bone morphogenetic protein 2 (rhBMP2) has demonstrated efficacy in bone regeneration, but not without significant side effects. The authors used rhBMP2 encapsulated in poly(lactic-co-glycolic acid) (PLGA) microspheres placed in a rabbit cranial defect model to test whether low-dose, sustained delivery can effectively induce bone regeneration. METHODS The rhBMP2 was encapsulated in 15% PLGA using a double-emulsion, solvent extraction/evaporation technique, and its release kinetics and bioactivity were tested. Two critical-size defects (10 mm) were created in the calvaria of New Zealand white rabbits (5 to 7 months of age, male and female) and filled with a collagen scaffold containing either (1) no implant, (2) collagen scaffold only, (3) PLGA-rhBMP2 (0.1 μg per implant), or (4) free rhBMP2 (0.1 μg per implant). After 6 weeks, the rabbits were killed and defects were analyzed by micro-computed tomography, histology, and finite element analysis. RESULTS The rhBMP2 delivered by means of bioactive PLGA microspheres resulted in higher volumes and surface area coverage of new bone than an equal dose of free rhBMP2 by micro-computed tomography (p=0.025 and p=0.025). Finite element analysis indicated that the mechanical competence using the regional elastic modulus did not differ with rhBMP2 exposure (p=0.70). PLGA-rhBMP2 did not demonstrate heterotopic ossification, craniosynostosis, or seroma formation. CONCLUSIONS Sustained delivery by means of PLGA microspheres can significantly reduce the rhBMP2 dose required for de novo bone formation. Optimization of the delivery system may be a key to reducing the risk for recently reported rhBMP2-related adverse effects.
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Boudrieau RJ. Initial Experience With rhBMP-2 Delivered in a Compressive Resistant Matrix for Mandibular Reconstruction in 5 Dogs. Vet Surg 2014; 44:443-58. [PMID: 24617340 DOI: 10.1111/j.1532-950x.2014.12171.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Accepted: 12/01/2013] [Indexed: 10/25/2022]
Abstract
OBJECTIVE To document cumulative initial experience and long-term follow-up of the use of rhBMP-2/CRM for reconstruction of large mandibular defects (≥5 cm) in dogs. STUDY DESIGN Retrospective case series. ANIMALS Dogs (n = 5). METHODS Medical records (October 1999-April 2011) of dogs that had mandibular reconstruction for defects/resections of ≥5 cm using rhBMP-2/CRM were reviewed. Signalment, preoperative assessment/rationale for mandibular reconstruction, surgical methods, postoperative assessment of the reconstruction (evaluation of occlusion), and complications were recorded. A definitive histologic diagnosis was obtained in dogs that had mandibular resection for mass removal. Long-term complications were determined. A minimum time frame of 2-year in-hospital follow-up was required for case inclusion. RESULTS Mandibular reconstruction was successfully performed in all dogs' defects where gaps of 5-9 cm were bridged. Surgical reconstruction rapidly restored cosmetic appearance and function. All dogs healed with new bone formation across the gap. New bone formation was present within the defects as early as 2 weeks after surgery based on palpation, and new bone formation bridging the gap was documented radiographically by 16 weeks. Minor complications occurred in all dogs in the early postoperative period, and included early firm swelling and gingival dehiscence in 1 dog; late plate exposure in 3 dogs; and exuberant/cystic bone formation in 2 dogs (related to concentration/formulation of rhBMP-2/CRM). Two dogs had minor long-term complications of late plate exposure and a non-vital canine tooth; the plates and the affected canine tooth were removed. Long-term in-hospital follow-up was 5.3 years (range, 2-12.5 years); further long-term telephone follow-up was 6.3 years (range, 2-12.5 years). All owners were pleased with the outcome and would repeat the surgery again under similar circumstances. CONCLUSION The efficacy and success of this mandibular reconstruction technique, using rhBMP-2/CRM with plate fixation, was demonstrated with bridging of large mandibular defects regardless of the underlying cause, and with excellent cosmetic and functional results. Complications were common, but considered minor and easily treated. The complications encountered revealed the importance of tailoring the use of BMPs and fixation methods to this specific anatomic location and indication.
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Affiliation(s)
- Randy J Boudrieau
- Department of Clinical Sciences, Tufts Cummings School of Veterinary Medicine, North Grafton, Massachusetts
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Fang J, Yang Z, Tan S, Tayag C, Nimni ME, Urata M, Han B. Injectable gel graft for bone defect repair. Regen Med 2014; 9:41-51. [DOI: 10.2217/rme.13.76] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Aim: To examine the performance of an injectable gel graft made of transglutaminase (Tg)-crosslinked gelatin gel with BMP-2 (BMP-2–Tg–Gel) for bone defect repair in animal models. Materials & methods: BMP-2 mixed with gelatin gel was crosslinked using Tg. The release of tethered BMP-2 through autocrine and paracrine pathways was demonstrated by using C2C12 and NIH 3T3 cells, respectively. BMP-2–Tg–Gel was injected into the induced cranial defect site. After 14 days, the sample was removed for x-ray imaging and histological evaluation. Results: Our in vivo results demonstrated that the injectable Tg–Gel with its osteoconductivity and controllable BMP-2 activity induced bone formation in our rat models when tethered with BMP-2. Conclusion: Tg–Gel as an injectable functional bone graft may enable the use of minimally invasive surgical procedures to treat irregular-shaped bone defects. Furthermore, this novel approach is capable of incorporating and controlling the release of therapeutic agents that may advance the science of tissue regeneration.
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Affiliation(s)
- Josephine Fang
- Division of Plastic & Reconstructive Surgery, Department of Surgery, Keck Medical School, University of Southern California, 1333 San Pablo St, BMT 302A, Los Angeles, CA 90089-9112, USA
| | - Zhi Yang
- Division of Plastic & Reconstructive Surgery, Department of Surgery, Keck Medical School, University of Southern California, 1333 San Pablo St, BMT 302A, Los Angeles, CA 90089-9112, USA
| | - ShihJye Tan
- Department of Biomedical Engineering, Viterbi School of Engineering, University of Southern California, Los Angeles, CA, USA
| | - Charisse Tayag
- Division of Plastic & Reconstructive Surgery, Department of Surgery, Keck Medical School, University of Southern California, 1333 San Pablo St, BMT 302A, Los Angeles, CA 90089-9112, USA
| | - Marcel E Nimni
- Division of Plastic & Reconstructive Surgery, Department of Surgery, Keck Medical School, University of Southern California, 1333 San Pablo St, BMT 302A, Los Angeles, CA 90089-9112, USA
| | - Mark Urata
- Division of Plastic & Reconstructive Surgery, Department of Surgery, Keck Medical School, University of Southern California, 1333 San Pablo St, BMT 302A, Los Angeles, CA 90089-9112, USA
| | - Bo Han
- Division of Plastic & Reconstructive Surgery, Department of Surgery, Keck Medical School, University of Southern California, 1333 San Pablo St, BMT 302A, Los Angeles, CA 90089-9112, USA
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Hassanein AH, Couto RA, Kurek KC, Rogers GF, Mulliken JB, Greene AK. Experimental Comparison of Cranial Particulate Bone Graft, rhBMP-2, and Split Cranial Bone Graft for Inlay Cranioplasty. Cleft Palate Craniofac J 2013; 50:358-62. [DOI: 10.1597/11-273] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background Particulate bone graft and recombinant human bone morphogenetic protein-2 (rhBMP-2) are options for inlay cranioplasty in children who have not developed a diploic space. The purpose of this study was to determine whether particulate bone graft or rhBMP-2 has superior efficacy for inlay cranioplasty and to compare these substances to split cranial bone. Methods A 17 mm × 17 mm critical-sized defect was made in the parietal bones of 22 rabbits and managed in four ways: Group I (no implant; n=5), Group II (particulate bone graft; n=5), Group III (rhBMP-2; n=7), and Group IV (split cranial bone graft; n=5). Animals underwent microcomputed tomography and histologic analysis 16 weeks after cranioplasty. Results Defects without an implant (Group I) demonstrated inferior ossification (41.4%; interquartile range [IQR], 28.9% to 42.5%) compared to those treated with particulate bone graft (Group II: 99.5%; IQR, 97.8% to 100%), rhBMP-2 (Group III: 99.6%; IQR, 99.5% to 100%), or split cranial bone (Group IV: 100%) ( P < .0001). There was no difference between Groups II, III, and IV ( P = .1). Defects treated with rhBMP-2 exhibited thinner bone (0.90 mm; IQR, 0.64 to 0.98) than particulate bone graft (1.95 mm; IQR, 1.09 to 2.83) or split cranial bone (1.72 mm; IQR, 1.54 to 1.88) ( P = .006); particulate and split cranial bone grafted defects had a similar thicknesses ( P = .6). Conclusions Particulate bone graft, rhBMP-2, and split cranial bone close inlay calvarial defect areas equally, although the thickness of bone healed with rhBMP-2 is inferior. Clinically, particulate bone graft or split cranial bone graft may be superior to rhBMP-2 for inlay cranioplasty.
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Affiliation(s)
| | - Rafael A. Couto
- Harvard Medical School, Harvard Medical School, Boston, Massachusetts
| | - Kyle C. Kurek
- Harvard Medical School, Department of Pathology, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts
| | - Gary F. Rogers
- Harvard Medical School, Harvard Medical School, Boston, Massachusetts
| | - John B. Mulliken
- Harvard Medical School, Harvard Medical School, Boston, Massachusetts
| | - Arin K. Greene
- Harvard Medical School, Department of Plastic and Oral Surgery, Harvard Medical School, Boston, Massachusetts
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Lu SX, Fiorini T, Lee J, Prasad HS, Buxton AN, Bisch FC, Dixon DR, Susin C, Wikesjö UME. Evaluation of a compression resistant matrix for recombinant human bone morphogenetic protein-2. J Clin Periodontol 2013; 40:688-97. [DOI: 10.1111/jcpe.12109] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/30/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Sheldon X. Lu
- Laboratory for Applied Periodontal & Craniofacial Regeneration (LAPCR); Georgia Regents University College of Dental Medicine; Augusta GA USA
- U.S. Army Advanced Education Program in Periodontics; Fort Gordon GA USA
| | - Tiago Fiorini
- Laboratory for Applied Periodontal & Craniofacial Regeneration (LAPCR); Georgia Regents University College of Dental Medicine; Augusta GA USA
| | - Jaebum Lee
- Laboratory for Applied Periodontal & Craniofacial Regeneration (LAPCR); Georgia Regents University College of Dental Medicine; Augusta GA USA
| | - Hari S. Prasad
- Hard Tissue Research Laboratory; University of Minnesota; Minneapolis MN USA
| | | | - Fredrick C. Bisch
- U.S. Army Advanced Education Program in Periodontics; Fort Gordon GA USA
| | - Douglas R. Dixon
- U.S. Army Advanced Education Program in Periodontics; Fort Gordon GA USA
| | - Cristiano Susin
- Laboratory for Applied Periodontal & Craniofacial Regeneration (LAPCR); Georgia Regents University College of Dental Medicine; Augusta GA USA
| | - Ulf M. E. Wikesjö
- Laboratory for Applied Periodontal & Craniofacial Regeneration (LAPCR); Georgia Regents University College of Dental Medicine; Augusta GA USA
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Smith DM, Cray JJ, Weiss LE, Dai Fei EK, Shakir S, Rottgers SA, Losee JE, Campbell PG, Cooper GM. Precise control of osteogenesis for craniofacial defect repair: the role of direct osteoprogenitor contact in BMP-2-based bioprinting. Ann Plast Surg 2013; 69:485-8. [PMID: 22972553 DOI: 10.1097/sap.0b013e31824cfe64] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Success with bone morphogenetic protein-2 (BMP-2) has been widely reported in the osseous reconstruction of large calvarial defects. These efforts have required enormous doses of BMP-2 and are not sufficiently refined to facilitate the detail-oriented repair required for intricate craniofacial structures. We have previously shown that inkjet-based bioprinting technologies allow for precisely customized low-dose protein patterns to induce spatially regulated osteogenesis. Here, we investigate the importance of direct contact between bioprinted BMP-2 and the dura mater (a source of osteoprogenitors) in mediating calvarial healing. METHODS Five-millimeter osseous defects were trephinated in mouse parietal bones (N=8). Circular acellular dermal matrix (ADM) implants were prepared such that 1 semicircle of 1 face per implant was printed with BMP-2 bio-ink. These implants were then placed ink-toward (N=3) or ink-away (N=5) from the underlying dura mater. After 4 weeks, osteogenesis was assessed in each of the 4 possible positions (BMP-2-printed area toward dura, BMP-2-printed area away from dura, unprinted area toward dura, and unprinted area away from dura) by faxitron. RESULTS The BMP-2-printed portion of the ADM generated bone covering an average of 66.5% of its surface area when it was face-down (printed surface directly abutting dura mater). By comparison, the BMP-2-printed portion of the ADM generated bone covering an average of only 21.3% of its surface area when it was face-up (printed surface away from dura). Similarly, the unprinted portion of the ADM generated an average of only 18.6% osseous coverage when face-down and 18.4% when face-up. CONCLUSIONS We have previously shown that inkjet-based bioprinting has the potential to significantly enhance the role of regenerative therapies in craniofacial surgery. This technology affords the precise control of osteogenesis necessary to reconstruct this region's intricate anatomical architecture. In the present study, we demonstrate that direct apposition of BMP-2-printed ADM to a source of osteoprogenitor cells (in this case dura mater) is necessary for bio-ink-directed osteogenesis to occur. These results have important implications for the design of more complex bioprinted osseous structures.
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Affiliation(s)
- Darren M Smith
- University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
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King WJ, Krebsbach PH. Growth factor delivery: how surface interactions modulate release in vitro and in vivo. Adv Drug Deliv Rev 2012; 64:1239-56. [PMID: 22433783 PMCID: PMC3586795 DOI: 10.1016/j.addr.2012.03.004] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Revised: 02/24/2012] [Accepted: 03/05/2012] [Indexed: 02/06/2023]
Abstract
Biomaterial scaffolds have been extensively used to deliver growth factors to induce new bone formation. The pharmacokinetics of growth factor delivery has been a critical regulator of their clinical success. This review will focus on the surface interactions that control the non-covalent incorporation of growth factors into scaffolds and the mechanisms that control growth factor release from clinically relevant biomaterials. We will focus on the delivery of recombinant human bone morphogenetic protein-2 from materials currently used in the clinical practice, but also suggest how general mechanisms that control growth factor incorporation and release delineated with this growth factor could extend to other systems. A better understanding of the changing mechanisms that control growth factor release during the different stages of preclinical development could instruct the development of future scaffolds for currently untreatable injuries and diseases.
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Affiliation(s)
- William J. King
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, 1011 N. University Ave., Ann Arbor, MI 48109, USA
| | - Paul H. Krebsbach
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, 1011 N. University Ave., Ann Arbor, MI 48109, USA
- Department of Biomedical Engineering, 2200 Bonisteel, Blvd., Ann Arbor, MI 48109, USA
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Iglesias-Linares A, Yañez-Vico RM, Moreno-Fernandez AM, Mendoza-Mendoza A, Solano-Reina E. Corticotomy-Assisted Orthodontic Enhancement by Bone Morphogenetic Protein-2 Administration. J Oral Maxillofac Surg 2012; 70:e124-32. [DOI: 10.1016/j.joms.2011.10.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2011] [Revised: 10/02/2011] [Accepted: 10/07/2011] [Indexed: 10/14/2022]
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