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Bao J, Fu X, Wu Y, Yang S, Ren X, Fang X, Yuan Q, Xie Z, Seriwatanachai D. The healing capacity and osteogenesis pattern of demineralized dentin matrix (DDM)-fibrin glue (FG) compound. Sci Rep 2023; 13:13140. [PMID: 37573402 PMCID: PMC10423223 DOI: 10.1038/s41598-023-40258-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 08/07/2023] [Indexed: 08/14/2023] Open
Abstract
Demineralized dentin matrix (DDM) is an osteoconductive and osteoinductive material that has been successfully used in sinus floor augmentation and alveolar ridge augmentation in clinical applications. It releases bone morphogenetic proteins (BMPs) and other growth factors, making DDM a suitable grafting material. However, the granular particle of DDM makes it difficult to anchor into the bone defect area. The aim of this study was to investigate the biological effects and osteoinductivity of the combination of DDM and Fibrin Glue (FG) at an optimal ratio on bone healing from a critical bone defect in an animal model. The mouse osteoblastic cell line (MC3T3-E1) was co-cultured with various ratios of DDM and FG to examine their effects on osteoblast proliferation and differentiation, as indicated by alkaline phosphatase (ALP) activity, osteocalcin (OC) production and mineralized nodules formation. The optimal ratio was then chosen for further study with a rabbit calvarial defective model, in which they were implanted with DDM or DDM-FG1 (1 g: 0.1 ml) and DDM-FG2 (1 g: 0.5 ml) compounds, or left blank for 2, 4, 8 and 12 weeks to investigate soft tissue and new bone regeneration. Micro-CT and histology analysis were used to evaluate the total grafting properties according to the different healing periods. The result from in vitro studies demonstrated that the ratio of 1:0.1 induced more ALP activity and mineralized nodules, while the ratio of 1: 0.5 (DDM-FG combined) induced more osteocalcin (OC) at specific time points. In the animal model, the 3D new bone volume in all DDM-FG treatment groups was significantly greater than that in the blank group at 2, 4, 8 and 12 weeks. Furthermore, the new bone volume was greater in DDM-FG2 when compared to the other groups during the early weeks of the healing period. In histological analysis, clusters of osteoblasts were formed adjacent to the DDM particles, and newly formed bone was observed in all groups, suggesting an osteoinductive property of DDM. Moreover, the greater new collagen synthesis observed at 4 weeks suggested that early bone healing was induced in the DDM-FG2 group. This study demonstrated that at an optimal ratio, the DDM-FG compound enhances osteogenic activities and bone regeneration.
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Affiliation(s)
- Jibo Bao
- Department of Oral Biology, Faculty of Dentistry, Mahidol University, 6 Yothi Street, Ratchathewi, Bangkok, Thailand
- Department of Implantology, School and Hospital of Stomatology, Kunming Medical University, Hecheng International Community, Building C, No.1088 the Middle of Hai Yuan Road, Wuhua District, Kunming, Yunnan, People's Republic of China
- Yunnan Key Laboratory of Stomatology, Kunming, Yunnan, People's Republic of China
| | - Xunan Fu
- Department of Chenggong Dental Clinic, School and Hospital of Stomatology, Chenggong New District, Kunming Medical University, University Town, Yuhua Street, Kunming, Yunnan, People's Republic of China
| | - Yirong Wu
- Department of The Second Dental Clinic, School and Hospital of Stomatology, Kunming Medical University, Yuantong Street, Wuhua District, Kunming, Yunnan, People's Republic of China
| | - Shengyin Yang
- Department of The First Dental Clinic, School and Hospital of Stomatology, Kunming Medical University, Hongyun Street, Wuhua District, Kunming, Yunnan, People's Republic of China
| | - Xiaobin Ren
- Department of Periodontics, School and Hospital of Stomatology, Kunming Medical University, Hecheng International Community, Building C, Wuhua District, Kunming, Yunnan, People's Republic of China
| | - Xingchen Fang
- School of Stomatology, Kunming Medical University, Chenggong District, Chunrong West Road, Kunming, Yunnan, People's Republic of China
| | - Quan Yuan
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Zhigang Xie
- Department of Implantology, School and Hospital of Stomatology, Kunming Medical University, Hecheng International Community, Building C, No.1088 the Middle of Hai Yuan Road, Wuhua District, Kunming, Yunnan, People's Republic of China.
- Yunnan Key Laboratory of Stomatology, Kunming, Yunnan, People's Republic of China.
| | - Dutmanee Seriwatanachai
- Department of Oral Biology, Faculty of Dentistry, Mahidol University, 6 Yothi Street, Ratchathewi, Bangkok, Thailand.
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Castilla A, Filliquist B, Spriet M, Garcia TC, Arzi B, Chou PY, Kapatkin AS. Long-Term Assessment of Bone Regeneration in Nonunion Fractures Treated with Compression-Resistant Matrix and Recombinant Human Bone Morphogenetic Protein-2 in Dogs. Vet Comp Orthop Traumatol 2023; 36:29-38. [PMID: 35760364 DOI: 10.1055/s-0042-1749451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
OBJECTIVE The aim of this study was to assess bone density, bone architecture and clinical function of canine nonunion distal appendicular long bone fractures with a defect treated with fixation, compression-resistant matrix and recombinant human bone morphogenetic protein-2 (rhBMP-2). STUDY DESIGN Prospective cohort study with dogs at least 1-year post treatment. Computed tomography was performed and quantitative measurements from previous fracture sites were compared with measurements from contralateral limbs. Subjective evaluation included gait assessment and palpation. RESULTS Six patients met the inclusion criteria. The rhBMP-2 treated bone exhibited higher density at the periphery and lower density in the centre, similar to the contralateral limb. All patients were weight bearing on the treated limb and all fractures were healed. CONCLUSION The rhBMP-2-treated bone underwent restoration of normal architecture and density. Acceptable limb function was present in all patients. The results of this study can serve as a basis for long-term response in treating nonunion fractures in veterinary patients.
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Affiliation(s)
- Andrea Castilla
- Veterinary Medical Teaching Hospital, Davis, University of California, California, United States
| | - Barbro Filliquist
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California, United States
| | - Mathieu Spriet
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California, United States
| | - Tanya C Garcia
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California, United States
| | - Boaz Arzi
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California, United States.,Veterinary Institute for Regenerative Cures, School of Veterinary Medicine, University of California, Davis, California, United States
| | - Po-Yen Chou
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California, United States
| | - Amy S Kapatkin
- Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California, Davis, California, United States
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Single Application of Low-Dose, Hydroxyapatite-Bound BMP-2 or GDF-5 Induces Long-Term Bone Formation and Biomechanical Stabilization of a Bone Defect in a Senile Sheep Lumbar Osteopenia Model. Biomedicines 2022; 10:biomedicines10020513. [PMID: 35203721 PMCID: PMC8962316 DOI: 10.3390/biomedicines10020513] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/11/2022] [Accepted: 02/14/2022] [Indexed: 12/13/2022] Open
Abstract
Effects of hydroxyapatite (HA) particles with bone morphogenetic BMP-2 or GDF-5 were compared in sheep lumbar osteopenia; in vitro release in phosphate-buffered saline (PBS) or sheep serum was assessed by ELISA. Lumbar (L) vertebral bone defects (Ø 3.5 mm) were generated in aged, osteopenic female sheep (n = 72; 9.00 ± 0.11 years; mean ± SEM). Treatment was: (a) HA particles (2.5 mg; L5); or (b) particles coated with BMP-2 (1 µg; 10 µg) or GDF-5 (5 µg; 50 µg; L4; all groups n = 6). Untouched vertebrae (L3) served as controls. Three and nine months post-therapy, bone formation was assessed by osteodensitometry, histomorphometry, and biomechanical testing. Cumulative 14-day BMP release was high in serum (76–100%), but max. 1.4% in PBS. In vivo induction of bone formation by HA particles with either growth factor was shown by: (i) significantly increased bone volume, trabecular and cortical thickness (overall increase HA + BMP vs. control close to the injection channel 71%, 110%, and 37%, respectively); (ii) partial significant effects for bone mineral density, bone formation, and compressive strength (increase 17%; 9 months; GDF-5). Treatment effects were not dose-dependent. Combined HA and BMPs (single low-dose) highly augment long-term bone formation and biomechanical stabilization in sheep lumbar osteopenia. Thus, carrier-bound BMP doses 20,000-fold to 1000-fold lower than previously applied appear suitable for spinal fusion/bone regeneration and improved treatment safety.
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Zastosowanie fibryny w inżynierii tkankowej. Osiągnięcia i perspektywy. POSTEP HIG MED DOSW 2021. [DOI: 10.2478/ahem-2021-0017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstrakt
W ostatnich latach istotnym obszarem zastosowania fibryny stała się inżynieria tkankowa, w której wykorzystuje się naturalne właściwości biostatyczne i bioaktywne fibryny, a także możliwość pułapkowania i wiązania w jej strukturze czynników wzrostu. Fibryna jest najczęściej stosowana w postaci żeli i dysków. Jednak każda postać wskutek pochłaniania wody docelowo przyjmuje postać żelu. Białko to w warunkach in vivo spełnia rolę rusztowania dla komórek, a także może być aplikowane w miejsca trudno dostępne – może wypełniać ubytki tkanek i podtrzymywać tkanki okalające, zapobiegając ich zapadaniu się. Ponadto fibryna hamuje krwawienie i inicjuje proces odnowy, jak również pełni rolę stymulatora wzrostu komórek. Przez modyfikacje struktury fibryny cząsteczkami adhezyjnymi, można przyspieszyć odbudowę prawidłowej struktury tkanek. Jej właściwości strukturalne mogą być także wykorzystywane jako rezerwuar czynników wzrostu i system ich przedłużonego uwalniania. Fibryna jest materiałem biodegradowalnym, umożliwiając skorelowanie ubytku matrycy fibrynowej z odbudową tkanek własnych pacjenta. Wprowadzenie metod druku 3D i elektroprzędzenia umożliwia formulację dopasowanych do uszkodzeń kształtek oraz włóknin bez utraty bioaktywnych funkcji fibryny. Metody te umożliwiają także poprawę właściwości mechanicznych przez otrzymywanie m.in. włóknin fibryny z innymi polimerami, co jest szczególnie uzasadnione w przypadku materiałów stosowanych w odbudowie takich struktur jak ścięgna czy kości. Biotechnologiczna synteza fibrynogenu może w przyszłości uniezależnić pozyskiwanie go z krwi i zwiększyć popularność wyrobów medycznych otrzymywanych z fibryny.
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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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Overcoming barriers confronting application of protein therapeutics in bone fracture healing. Drug Deliv Transl Res 2020; 11:842-865. [PMID: 32783153 DOI: 10.1007/s13346-020-00829-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Bone fracture is a major contributor to debilitation and death among patients with bone diseases. Thus, osteogenic protein therapeutics and their delivery to bone have been extensively researched as strategies to accelerate fracture healing. To prevent morbidity and mortality of fractures, which occur frequently in the aging population, there is a critical need for development of first-line therapeutics. Bone morphogenic protein-2 (BMP-2) has been at the forefront of bone regeneration research for its potent osteoinduction, despite safety concerns and biophysiological obstacles of delivery to bone. However, continued pursuit of osteoinductive proteins as a therapeutic option is largely aided by drug delivery systems, playing an imperative role in enhancing safety and efficacy. In this work, we highlighted several types of drug delivery platforms and their biomaterials, to evaluate the suitability in overcoming challenges of therapeutic protein delivery for bone regeneration. To showcase the clinical considerations for each type of platform, we have assessed the most common route of administration strategies for bone regeneration, classifying the platforms as implantable or injectable. Additionally, we have analyzed the commonly utilized models and methodology for safety and efficacy evaluation of these osteogenic protein-loaded systems, to present clinical opinions for future directions of research in this field. It is hoped that this review will promote research and development of clinically translatable osteogenic protein therapeutics, while targeting first-line treatment status for achieving desired outcomes of fracture healing. Graphical abstract.
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7
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Jose G, Shalumon K, Chen JP. Natural Polymers Based Hydrogels for Cell Culture Applications. Curr Med Chem 2020; 27:2734-2776. [DOI: 10.2174/0929867326666190903113004] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 08/15/2019] [Accepted: 08/20/2019] [Indexed: 02/06/2023]
Abstract
It is well known that the extracellular matrix (ECM) plays a vital role in the growth, survival
and differentiation of cells. Though two-dimensional (2D) materials are generally used as substrates for
the standard in vitro experiments, their mechanical, structural, and compositional characteristics can
alter cell functions drastically. Many scientists reported that cells behave more natively when cultured
in three-dimensional (3D) environments than on 2D substrates, due to the more in vivo-like 3D cell
culture environment that can better mimic the biochemical and mechanical properties of the ECM. In
this regard, water-swollen network polymer-based materials called hydrogels are highly attractive for
developing 3D ECM analogs due to their biocompatibility and hydrophilicity. Since hydrogels can be
tuned and altered systematically, these materials can function actively in a defined culture medium to
support long-term self-renewal of various cells. The physico-chemical and biological properties of the
materials used for developing hydrogel should be tunable in accordance with culture needs. Various
types of hydrogels derived either from natural or synthetic origins are currently being used for cell culture
applications. In this review, we present an overview of various hydrogels based on natural polymers
that can be used for cell culture, irrespective of types of applications. We also explain how each
hydrogel is made, its source, pros and cons in biological applications with a special focus on regenerative
engineering.
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Affiliation(s)
- Gils Jose
- Department of Chemical and Materials Engineering, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan
| | - K.T. Shalumon
- Department of Chemical and Materials Engineering, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan
| | - Jyh-Ping Chen
- Department of Chemical and Materials Engineering, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan
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Fung SL, Wu X, Maceren JP, Mao Y, Kohn J. In Vitro Evaluation of Recombinant Bone Morphogenetic Protein-2 Bioactivity for Regenerative Medicine. Tissue Eng Part C Methods 2020; 25:553-559. [PMID: 31418333 PMCID: PMC6761583 DOI: 10.1089/ten.tec.2019.0156] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Recombinant human bone morphogenetic protein-2 (rhBMP-2) is a commonly used growth factor in bone regeneration due to its high potency and ability to induce osteogenic differentiation of osteoblasts and osteoblast precursors. When designing delivery systems for rhBMP-2, the activity of the loaded and released protein is an important consideration. The variability in the experimental design parameters used to measure rhBMP-2 activity in vitro has precluded comparative analysis. Here, for the first time, we report a direct comparison of the assay parameters used in rhBMP-2 bioactivity assays in the literature and an evaluation of commercially available rhBMP-2 obtained from different vendors. Most published rhBMP-2 assays use W-20-17 (mouse stromal), MC3T3 (preosteoblast), or C2C12 (myoblast) cell lines. We found that each model cell line has an optimal concentration range over which it is most sensitive to rhBMP-2 induction. Therefore, it is difficult to find one single bioassay protocol that could be universally used. In addition, we established a correlation between protein concentration (as measured by enzyme-linked immunosorbent assay) and protein activity (as measured by alkaline phosphatase induction). We found that the expression system used to produce the rhBMP-2 had the greatest effect on its activity and stability in vitro. Establishing a standard method of measuring rhBMP-2 activity in vitro is the first step toward developing an in vitro–in vivo correlation between measured activity and clinical outcomes.
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Affiliation(s)
- Stephanie L Fung
- New Jersey Center for Biomaterials, Rutgers-The State University of New Jersey, Piscataway, New Jersey
| | - Xiaohuan Wu
- New Jersey Center for Biomaterials, Rutgers-The State University of New Jersey, Piscataway, New Jersey
| | - Julian P Maceren
- New Jersey Center for Biomaterials, Rutgers-The State University of New Jersey, Piscataway, New Jersey
| | - Yong Mao
- New Jersey Center for Biomaterials, Rutgers-The State University of New Jersey, Piscataway, New Jersey
| | - Joachim Kohn
- New Jersey Center for Biomaterials, Rutgers-The State University of New Jersey, Piscataway, New Jersey
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Wang H, Qu X, Zhang Z, Lei M, Tan H, Bao C, Lin S, Zhu L, Kohn J, Liu C. Tag-Free Site-Specific BMP-2 Immobilization with Long-Acting Bioactivities via a Simple Sugar-Lectin Interaction. ACS Biomater Sci Eng 2020; 6:2219-2230. [PMID: 33455345 DOI: 10.1021/acsbiomaterials.9b01730] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The construction of a biomaterial matrix with biological properties is of great importance to developing functional materials for clinical use. However, the site-specific immobilization of growth factors to endow materials with bioactivities has been a challenge to date. Considering the wide existence of glycosylation in mammalian proteins or recombinant proteins, we establish a bioaffinity-based protein immobilization strategy (bioanchoring method) utilizing the native sugar-lectin interaction between concanavalin A (Con A) and the oligosaccharide chain on glycosylated bone morphogenetic protein-2 (GBMP-2). The interaction realizes the site-specific immobilization of GBMP-2 to a substrate modified with Con A while preserving its bioactivity in a sustained and highly efficient way, as evidenced by its enhanced ability to induce osteodifferentiation compared with that of the soluble GBMP-2. Moreover, the surface with Con A-bioanchored GBMP-2 can be reused to stimulate multiple batches of C2C12 cells to differentiate almost to the same degree. Even after 4 month storage at 4 °C in phosphate-buffered saline (PBS), the Con A-bioanchored GBMP-2 still maintains the bioactivity to stimulate the differentiation of C2C12 cells. Furthermore, the ectopic ossification test proves the in vivo bioactivity of bioanchored GBMP-2. Overall, our results demonstrate that the tag-free and site (i.e., sugar chain)-specific protein immobilization strategy represents a simple and generic alternative, which is promising to apply for other glycoprotein immobilization and application. It should be noted that although the lectin we utilized can only bind to d-mannose/d-glucose, the diversity of the lectin family assures that a specific lectin could be offered for other sugar types, thus expanding the applicable scope further.
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Affiliation(s)
| | | | - Zheng Zhang
- Department of Chemistry and Chemical Biology and New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | | | | | | | | | | | - Joachim Kohn
- Department of Chemistry and Chemical Biology and New Jersey Center for Biomaterials, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
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Stability and Biological Activity of E. coli Derived Soluble and Precipitated Bone Morphogenetic Protein-2. Pharm Res 2019; 36:184. [DOI: 10.1007/s11095-019-2705-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 09/16/2019] [Indexed: 01/24/2023]
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Jin ES, Kim JY, Lee B, Min J, Jeon SR, Choi KH, Jeong JH. Biodegradable Screws Containing Bone Morphogenetic Protein-2 in an Osteoporotic Rat Model. J Korean Neurosurg Soc 2018; 61:559-567. [PMID: 30041512 PMCID: PMC6129746 DOI: 10.3340/jkns.2017.0297] [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: 11/30/2017] [Accepted: 02/09/2018] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE The aim of this study was to evaluate the effect for biodegradable screws containing bone morphogenetic protein-2 (BMP-2) in an osteoporotic rat model. METHODS Twenty-four female Wistar rat (250-300 g, 12 weeks of age) were randomized into four groups. Three groups underwent bilateral ovariectomy (OVX). Biodegradable screws with or without BMP-2 were inserted in the proximal tibia in two implantation groups. The extracted proximal metaphysis of the tibiae were scanned by exo-vivo micro-computed tomography. Evaluated parameters included bone mineral density (BMD), trabecular bone volume (BV/TV), trabecular number, trabecular thickness, and trabecular separation (Tb.Sp). The tibia samples were pathologically evaluated by staining with by Hematoxylin and Eosin, and trichrome. RESULTS Trabecular formation near screw insertion site was evident only in rats receiving BMP-2 screws. BMD and BV/TV significantly differed between controls and the OVX and OVX with screw groups. However, there were no significant differences between control and OVX with screw BMP groups. Tb.Sp significantly differed between control and OVX and OVX with screw groups (p<0.05), and between the OVX and OVX with screw BMP group (p<0.05), with no statistically significant difference between control and OVX with screw BMP groups. Over the 12 weeks after surgery, bone lamellae in direct contact with the screw developed more extensive and thicker trabecular bone around the implant in the OVX with screw BMP group compared to the OVX with screw group. CONCLUSION Biodegradable screws containing BMP-2 improve nearby bone conditions and enhance ostoeintegration between the implant and the osteoporotic bone.
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Affiliation(s)
- Eun-Sun Jin
- Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea.,Laboratory of Stem Cell Therapy, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Ji Yeon Kim
- Laboratory of Stem Cell Therapy, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Bora Lee
- Department of Biostatistic Consulting, Soon Chun Hyang Medical Center, Bucheon, Korea
| | - JoongKee Min
- Laboratory of Stem Cell Therapy, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sang Ryong Jeon
- Laboratory of Stem Cell Therapy, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.,Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Kyoung Hyo Choi
- Laboratory of Stem Cell Therapy, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.,Department of Rehabilitation Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Je Hoon Jeong
- Laboratory of Stem Cell Therapy, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.,Department of Neurosurgery, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
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12
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The Surface Anodization of Titanium Dental Implants Improves Blood Clot Formation Followed by Osseointegration. COATINGS 2018. [DOI: 10.3390/coatings8070252] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The anodization of titanium dental implant influences the biologic processes of osseointegration. 34 grit-blasted and acid-etched titanium specimens were used to evaluate micro- and nano-roughness (Ra), contact angle (θ) and blood clot extension (bce). 17 samples were anodized (test) while the remaining were used as control. The bce, was measured using 10 µL of human blood left in contact with titanium for 5 min at room temperature. The micro- and nano-scale Ra were measured under CLSM and AFM, respectively, while the θ was analyzed using the sessile drop technique. The bone-implant contact (BIC) rate was measured on two narrow implants retrieved for fracture. bce was 42.5 (±22) for test and 26.6% (±13)% for control group (p = 0.049). The micro-Ra was 6.0 (±1.5) for the test and 5.8 (±1.8) µm for control group (p > 0.05). The θ was 98.5° (±18.7°) for test and 103° (±15.2°) for control group (p > 0.05). The nano-Ra was 286 (±40) for the test and 226 (±40) nm for control group (p < 0.05). The BIC rate was 52.5 (±2.1) for test and 34.5% (±2.1%) for control implant (p = 0.014). (Conclusions) The titanium anodized surface significantly increases blood clot retention, significantly increases nano-roughness, and favors osseointegration. When placing dental implants in poor bone quality sites or with immediate loading protocol anodized Ti6Al4V dental implants should be preferred.
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13
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Noori A, Ashrafi SJ, Vaez-Ghaemi R, Hatamian-Zaremi A, Webster TJ. A review of fibrin and fibrin composites for bone tissue engineering. Int J Nanomedicine 2017; 12:4937-4961. [PMID: 28761338 PMCID: PMC5516781 DOI: 10.2147/ijn.s124671] [Citation(s) in RCA: 255] [Impact Index Per Article: 36.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Tissue engineering has emerged as a new treatment approach for bone repair and regeneration seeking to address limitations associated with current therapies, such as autologous bone grafting. While many bone tissue engineering approaches have traditionally focused on synthetic materials (such as polymers or hydrogels), there has been a lot of excitement surrounding the use of natural materials due to their biologically inspired properties. Fibrin is a natural scaffold formed following tissue injury that initiates hemostasis and provides the initial matrix useful for cell adhesion, migration, proliferation, and differentiation. Fibrin has captured the interest of bone tissue engineers due to its excellent biocompatibility, controllable biodegradability, and ability to deliver cells and biomolecules. Fibrin is particularly appealing because its precursors, fibrinogen, and thrombin, which can be derived from the patient's own blood, enable the fabrication of completely autologous scaffolds. In this article, we highlight the unique properties of fibrin as a scaffolding material to treat bone defects. Moreover, we emphasize its role in bone tissue engineering nanocomposites where approaches further emulate the natural nanostructured features of bone when using fibrin and other nanomaterials. We also review the preparation methods of fibrin glue and then discuss a wide range of fibrin applications in bone tissue engineering. These include the delivery of cells and/or biomolecules to a defect site, distributing cells, and/or growth factors throughout other pre-formed scaffolds and enhancing the physical as well as biological properties of other biomaterials. Thoughts on the future direction of fibrin research for bone tissue engineering are also presented. In the future, the development of fibrin precursors as recombinant proteins will solve problems associated with using multiple or single-donor fibrin glue, and the combination of nanomaterials that allow for the incorporation of biomolecules with fibrin will significantly improve the efficacy of fibrin for numerous bone tissue engineering applications.
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Affiliation(s)
- Alireza Noori
- Department of Tissue Engineering and Applied Cell Sciences, Faculty of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran
| | | | - Roza Vaez-Ghaemi
- Department of Chemical and Biological Engineering, Faculty of Biomedical Engineering, The University of British Columbia, Vancouver, BC, Canada
| | | | - Thomas J Webster
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
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Wen B, Shafer D, Schleier P, Pendrys D, Kuhn L, Freilich M. Implant-guided supracrestal alveolar bone growth using scaffolds, BMP-2, and novel scaffold-retaining device. Clin Oral Implants Res 2017; 28:1411-1420. [DOI: 10.1111/clr.13005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/12/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Bo Wen
- Department of Oral & Maxillofacial Surgery; Division of Implant Dentistry; Nanjing Stomatological Hospital; Medical School of Nanjing University; Nanjing China
| | - David Shafer
- Department of Craniofacial Sciences; Division of Oral & Maxillofacial Surgery; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - Peter Schleier
- Department of head and neck; Stavanger University Hospital; Stavanger Norway
| | - David Pendrys
- Department of Reconstructive Sciences; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - Liisa Kuhn
- Department of Reconstructive Sciences; Center for Biomaterials; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - Martin Freilich
- Department of Reconstructive Sciences; Center for Biomaterials; School of Dental Medicine; University of Connecticut; Farmington CT USA
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15
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Tauscher PM, Gui J, Shimmi O. Adaptive protein divergence of BMP ligands takes place under developmental and evolutionary constraints. Development 2016; 143:3742-3750. [PMID: 27578781 DOI: 10.1242/dev.130427] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 08/17/2016] [Indexed: 11/20/2022]
Abstract
The bone morphogenetic protein (BMP) signaling network, comprising evolutionary conserved BMP2/4/Decapentaplegic (Dpp) and Chordin/Short gastrulation (Sog), is widely utilized for dorsal-ventral (DV) patterning during animal development. A similar network is required for posterior crossvein (PCV) formation in the Drosophila pupal wing. Although both transcriptional and post-transcriptional regulation of co-factors in the network gives rise to tissue-specific and species-specific properties, their mechanisms are incompletely understood. In Drosophila, BMP5/6/7/8-type ligands, Screw (Scw) and Glass bottom boat (Gbb), form heterodimers with Dpp for DV patterning and PCV development, respectively. Sequence analysis indicates that the Scw ligand contains two N-glycosylation motifs: one being highly conserved between BMP2/4- and BMP5/6/7/8-type ligands, and the other being Scw ligand specific. Our data reveal that N-glycosylation of the Scw ligand boosts BMP signaling both in cell culture and in the embryo. In contrast, N-glycosylation modifications of Gbb or Scw ligands reduce the consistency of PCV development. These results suggest that tolerance for structural changes of BMP5/6/7/8-type ligands is dependent on developmental constraints. Furthermore, gain and loss of N-glycosylation motifs in conserved signaling molecules under evolutionary constraints appear to constitute flexible modules to adapt to developmental processes.
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Affiliation(s)
- Petra M Tauscher
- Institute of Biotechnology, University of Helsinki, Helsinki 00014, Finland
| | - Jinghua Gui
- Institute of Biotechnology, University of Helsinki, Helsinki 00014, Finland
| | - Osamu Shimmi
- Institute of Biotechnology, University of Helsinki, Helsinki 00014, Finland
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16
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Jazayeri HE, Fahmy MD, Razavi M, Stein BE, Nowman A, Masri RM, Tayebi L. Dental Applications of Natural-Origin Polymers in Hard and Soft Tissue Engineering. J Prosthodont 2016; 25:510-7. [DOI: 10.1111/jopr.12465] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/16/2015] [Indexed: 12/11/2022] Open
Affiliation(s)
- Hossein E. Jazayeri
- University of Pennsylvania School of Dental Medicine; Philadelphia PA
- Marquette University School of Dentistry; Milwaukee WI
| | - Mina D. Fahmy
- Marquette University School of Dentistry; Milwaukee WI
| | - Mehdi Razavi
- BCAST, Institute of Materials and Manufacturing; Brunel University London; Uxbridge London UK
- Brunel Institute for Bioengineering; Brunel University London; Uxbridge London UK
| | - Brett E. Stein
- University of Pennsylvania School of Dental Medicine; Philadelphia PA
| | - Aatif Nowman
- Marquette University School of Dentistry; Milwaukee WI
| | - Radi M. Masri
- Department of Endodontics, Prosthodontics and Operative Dentistry; University of Maryland School of Dentistry; Baltimore MD
| | - Lobat Tayebi
- Marquette University School of Dentistry; Milwaukee WI
- Department of Engineering Science; University of Oxford; Oxford UK
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17
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Wen B, Kuhn L, Charles L, Pendrys D, Shafer D, Freilich M. Comparison of bone morphogenetic protein-2 delivery systems to induce supracrestal bone guided by titanium implants in the rabbit mandible. Clin Oral Implants Res 2015; 27:676-85. [DOI: 10.1111/clr.12645] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Bo Wen
- Department of Oral and Maxillofacial Surgery; Division of Implant Dentistry; Affiliated Stomatology Hospital of Medical School; Nanjing University; Nanjing China
| | - Liisa Kuhn
- Department of Reconstructive Sciences; Center for Regeneration Medicine and Skeletal Development; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - Lyndon Charles
- Department of Reconstructive Sciences; Center for Regeneration Medicine and Skeletal Development; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - David Pendrys
- Department of Reconstructive Sciences; Center for Regeneration Medicine and Skeletal Development; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - David Shafer
- Department of Craniofacial Sciences; Division of Oral and Maxillofacial Surgery; School of Dental Medicine; University of Connecticut; Farmington CT USA
| | - Martin Freilich
- Department of Reconstructive Sciences; Center for Regeneration Medicine and Skeletal Development; School of Dental Medicine; University of Connecticut; Farmington CT USA
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18
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Yu X, Tang X, Gohil SV, Laurencin CT. Biomaterials for Bone Regenerative Engineering. Adv Healthc Mater 2015; 4:1268-85. [PMID: 25846250 PMCID: PMC4507442 DOI: 10.1002/adhm.201400760] [Citation(s) in RCA: 208] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Revised: 02/21/2015] [Indexed: 01/08/2023]
Abstract
Strategies for bone tissue regeneration have been continuously evolving for the last 25 years since the introduction of the "tissue engineering" concept. The convergence of the life, physical, and engineering sciences has brought in several advanced technologies available to tissue engineers and scientists. This resulted in the creation of a new multidisciplinary field termed as "regenerative engineering". In this article, the role of biomaterials in bone regenerative engineering is systematically reviewed to elucidate the new design criteria for the next generation of biomaterials for bone regenerative engineering. The exemplary design of biomaterials harnessing various materials characteristics towards successful bone defect repair and regeneration is highlighted. Particular attention is given to the attempts of incorporating advanced materials science, stem cell technologies, and developmental biology into biomaterials design to engineer and develop the next generation bone grafts.
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Affiliation(s)
- Xiaohua Yu
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- The Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Xiaoyan Tang
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06268
| | - Shalini V. Gohil
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Cato T. Laurencin
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- The Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06268, USA
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06268
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Enhanced differentiation of human osteoblasts on Ti surfaces pre-treated with human whole blood. Acta Biomater 2015; 19:180-90. [PMID: 25818948 DOI: 10.1016/j.actbio.2015.03.022] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 03/02/2015] [Accepted: 03/19/2015] [Indexed: 12/20/2022]
Abstract
Early and effective integration of a metal implant into bone tissue is of crucial importance for its long-term stability. While different material properties including surface roughness and wettability but also initial blood-implant surface interaction are known to influence this osseointegration, implications of the latter process are still poorly understood. In this study, early interaction between blood and the implant surface and how this affects the mechanism of osseointegration were investigated. For this, blood coagulation on a micro-roughened hydrophobic titanium (Ti) surface (SLA-H(phob)) and on a hydrophilic micro-roughened Ti surface with nanostructures (SLActive-H(phil)NS), as well as the effects of whole human blood pre-incubation of these two surfaces on the differentiation potential of primary human bone cells (HBC) was assessed. Interestingly, pre-incubation with blood resulted in a dense fibrin network over the entire surface on SLActive-H(phil)NS but only in single patches of fibrin and small isolated fibre complexes on SLA-H(phob). On SLActive-H(phil)NS, the number of HBCs attaching to the fibrin network was greatly increased and the cells displayed enhanced cell contact to the fibrin network. Notably, HBCs displayed increased expression of the osteogenic marker proteins alkaline phosphatase and collagen-I when cultivated on both surfaces upon blood pre-incubation. Additionally, blood pre-treatment promoted an earlier and enhanced mineralization of HBCs cultivated on SLActive-H(phil)NS compared to SLA-H(phob). The results presented in this study therefore suggest that blood pre-incubation of implant surfaces mimics a more physiological situation, eventually providing a more predictive in vitro model for the evaluation of novel bone implant surfaces.
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20
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Bone Regeneration Using Bone Morphogenetic Proteins and Various Biomaterial Carriers. MATERIALS 2015; 8:1778-1816. [PMID: 28788032 PMCID: PMC5507058 DOI: 10.3390/ma8041778] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/24/2015] [Accepted: 03/27/2015] [Indexed: 01/28/2023]
Abstract
Trauma and disease frequently result in fractures or critical sized bone defects and their management at times necessitates bone grafting. The process of bone healing or regeneration involves intricate network of molecules including bone morphogenetic proteins (BMPs). BMPs belong to a larger superfamily of proteins and are very promising and intensively studied for in the enhancement of bone healing. More than 20 types of BMPs have been identified but only a subset of BMPs can induce de novo bone formation. Many research groups have shown that BMPs can induce differentiation of mesenchymal stem cells and stem cells into osteogenic cells which are capable of producing bone. This review introduces BMPs and discusses current advances in preclinical and clinical application of utilizing various biomaterial carriers for local delivery of BMPs to enhance bone regeneration.
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Leijten J, Chai Y, Papantoniou I, Geris L, Schrooten J, Luyten F. Cell based advanced therapeutic medicinal products for bone repair: Keep it simple? Adv Drug Deliv Rev 2015; 84:30-44. [PMID: 25451134 DOI: 10.1016/j.addr.2014.10.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 09/18/2014] [Accepted: 10/20/2014] [Indexed: 02/08/2023]
Abstract
The development of cell based advanced therapeutic medicinal products (ATMPs) for bone repair has been expected to revolutionize the health care system for the clinical treatment of bone defects. Despite this great promise, the clinical outcomes of the few cell based ATMPs that have been translated into clinical treatments have been far from impressive. In part, the clinical outcomes have been hampered because of the simplicity of the first wave of products. In response the field has set-out and amassed a plethora of complexities to alleviate the simplicity induced limitations. Many of these potential second wave products have remained "stuck" in the development pipeline. This is due to a number of reasons including the lack of a regulatory framework that has been evolving in the last years and the shortage of enabling technologies for industrial manufacturing to deal with these novel complexities. In this review, we reflect on the current ATMPs and give special attention to novel approaches that are able to provide complexity to ATMPs in a straightforward manner. Moreover, we discuss the potential tools able to produce or predict 'goldilocks' ATMPs, which are neither too simple nor too complex.
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22
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Fibrin Hydrogel Based Bone Substitute Tethered with BMP-2 and BMP-2/7 Heterodimers. MATERIALS 2015; 8:977-991. [PMID: 28787983 PMCID: PMC5455435 DOI: 10.3390/ma8030977] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 02/09/2015] [Accepted: 03/02/2015] [Indexed: 12/18/2022]
Abstract
Current clinically used delivery methods for bone morphogenetic proteins (BMPs) are collagen based and require large concentrations that can lead to dangerous side effects. Fibrin hydrogels can serve as osteoinductive bone substitute materials in non-load bearing bone defects in combination with BMPs. Two strategies to even further optimize such a fibrin based system include employing more potent BMP heterodimers and engineering growth factors that can be covalently tethered to and slowly released from a fibrin matrix. Here we present an engineered BMP-2/BMP-7 heterodimer where an N-terminal transglutaminase substrate domain in the BMP-2 portion provides covalent attachment to fibrin together with a central plasmin substrate domain, a cleavage site for local release of the attached BMP-2/BMP-7 heterodimer under the influence of cell-activated plasmin. In vitro and in vivo results revealed that the engineered BMP-2/BMP-7 heterodimer induces significantly more alkaline phosphatase activity in pluripotent cells and bone formation in a rat calvarial model than the engineered BMP-2 homodimer. Therefore, the engineered BMP-2/BMP-7 heterodimer could be used to reduce the amount of BMP needed for clinical effect.
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23
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Yu X, Murphy WL. 3-D Scaffold Platform for Optimized Non-viral Transfection of Multipotent Stem Cells. J Mater Chem B 2014; 2:8186-8193. [PMID: 25541592 PMCID: PMC4273581 DOI: 10.1039/c4tb00957f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Optimization of non-viral gene delivery from biomaterials is of critical importance, as several material parameters are known to influence non-viral transfection efficiency. A series of previous studies have achieved screening of gene delivery vectors on two dimensional (2D) substrates, which have direct relevance to cell culture applications. There is an additional need to create screening systems that are 3-dimensional (3D), and can thus be applied to emerging tissue engineering applications. Here, we report an enhanced throughput, 3D scaffold platform to screen for the influence of mineral coating properties on stem cell transfection. Mineral coatings with a range of physicochemical properties were formed on the scaffolds within a 96-well plate format, while maintaining an interconnected macroporous scaffold structure. A series of general gene delivery parameters, including plasmid amount, N/P ratio, and cell density, were efficiently screened in scaffolds using a luciferase-encoding plasmid as a reporter. In addition, human mesenchymal stem cell (hMSC) transfection with a plasmid encoding bone morphogenetic protein-2 (BMP-2) was successfully optimized by screening a library of mineral coatings, resulting in over 5-fold increases in BMP-2 production when compared to standard techniques. Notably, the majority of BMP-2 was incorporated into the mineral coating following secretion from the cells. The 3D mineral coated scaffold platform described here may accelerate gene delivery optimization and improve the predictability of the screening systems, which could facilitate translation of gene delivery to clinical applications.
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Affiliation(s)
- Xiaohua Yu
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI 53706, USA
| | - W. L. Murphy
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI 53706, USA
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI 53706, USA
- Department of Orthopedics and Rehabilitation, University of Wisconsin, Madison, WI 53705, USA
- AO Foundation Collaborative Research Center, Davos, Switzerland
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Thoma DS, Kruse A, Ghayor C, Jung RE, Weber FE. Bone augmentation using a synthetic hydroxyapatite/silica oxide-based and a xenogenic hydroxyapatite-based bone substitute materials with and without recombinant human bone morphogenetic protein-2. Clin Oral Implants Res 2014; 26:592-8. [PMID: 25138542 DOI: 10.1111/clr.12469] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/03/2014] [Indexed: 12/01/2022]
Abstract
AIM To test whether or not bone regeneration using deproteinized bovine bone mineral (DBBM) is comparable to hydroxyapatite/silica oxide (HA/SiO) and to test the effect of recombinant human bone morphogenetic protein-2 (rhBMP-2) as an adjunct to DBBM for localized bone regeneration. MATERIALS AND METHODS In each of the 10 rabbits, 4 titanium cylinders were placed on the external cortical plates of their calvaria. Four treatment modalities were randomly allocated: (i) empty, (ii) HA/SiO, (iii) DBBM, and (iv) DBBM plus rhBMP-2 (DBBM/BMP). The animals were sacrificed at week 8. Descriptive histology and histomorphometric assessment using a superimposed test grid of points and cycloids were performed. RESULTS The mean number of points of the test grid coinciding with bone within the cylinder reached 124 ± 35 bone points for empty controls, 92 ± 40 bone points for DBBM, 98 ± 44 bone points for synthetic HA/SiO, and 146 ± 34 bone points DBBM/BMP. The P-value for DBBM with and without BMP reached a borderline statistical significance of 0.051. However, the area of bone regeneration within the cylinders peaked for DBBM/BMP and was statistically significantly higher compared with empty cylinders (P < 0.05). The bone-to-bone substitute contact ranged between 32.9% ± 21.7 for DBBM, 39.6 ± 18.4% for HA/SiO, and 57.8% ± 10.2 for DBBM/BMP. The differences between DBBM/BMP and controls (DBBM, HA/SiO) were statistically significant (P < 0.05). CONCLUSIONS DBBM and HA/SiO rendered comparable amounts of bone regeneration. The addition of rhBMP-2 to DBBM resulted in more favorable outcomes with respect to the area of bone regeneration and to bone-to-implant contact, thereby indicating the potential of this growth factor to enhance bone regeneration within this animal model.
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Affiliation(s)
- D S Thoma
- Department of Fixed and Removable Prothodontics and Dental Material Science, Dental School, University of Zurich, Zurich, Switzerland
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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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26
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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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Cai WX, Zheng LW, Weber FE, Li CL, Ma L, Ehrbar M, Zwahlen RA. Heterotopic bone formation around vessels: pilot study of a new animal model. Biores Open Access 2013; 2:266-72. [PMID: 23914333 PMCID: PMC3731688 DOI: 10.1089/biores.2013.0025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
To achieve an easily established, safe, and reproducible animal model for the study of heterotopic bone formation around vessels, a small animal series using New Zealand White rabbits was performed. Three different dosages of recombinant human bone morphogenic protein (rhBMP-2) carried by fibrin matrix were tested. A guided tissue regeneration (GTR) membrane sheet was formed into a tube and allowed to harden; it served both to maintain the space around the vessel bundle and to separate the fibrin matrix with rhBMP-2 from skeletal muscle. Wrapped around the femoral vessel bundle and fixed in place, the tube was filled with the fibrin matrix containing rhBMP-2. The surgical site was closed in layers, and the postoperative healing was uneventful. All animals resumed their full preoperative daily activities 3–4 days after the operation. No adverse events such as wound dehiscence or infection occurred, and all animals could be sacrified at the scheduled date. Micro–computed tomography and histological investigations showed heterotopic bone formation around the vessel bundle in the medium- and high-dosage rhBMP-2 groups. An easy, safe, and reproducible animal model that allows the study of heterotopic bone formation around vessels was successfully established.
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Affiliation(s)
- Wei-Xin Cai
- Discipline of Oral & Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong , Hong Kong, China
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Hwang CJ, Lee JH, Baek HR, Chang BS, Lee CK. Evaluation of the efficacy of Escherichia coli-derived recombinant human bone morphogenetic protein-2 in a mini-pig spinal anterior interbody fusion model. Bone Joint J 2013; 95-B:217-23. [DOI: 10.1302/0301-620x.95b2.29466] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We evaluated the efficacy of Escherichia coli-derived recombinant human bone morphogenetic protein-2 (E-BMP-2) in a mini-pig model of spinal anterior interbody fusion. A total of 14 male mini-pigs underwent three-level anterior lumbar interbody fusion using polyether etherketone (PEEK) cages containing porous hydroxyapatite (HA). Four groups of cages were prepared: 1) control (n = 10 segments); 2) 50 μg E-BMP-2 (n = 9); 3) 200 μg E-BMP-2 (n = 10); and 4) 800 μg E-BMP-2 (n = 9). At eight weeks after surgery the mini-pigs were killed and the specimens were evaluated by gross inspection and manual palpation, radiological evaluation including plain radiographs and micro-CT scans, and histological analysis. Rates of fusion within PEEK cages and overall union rates were calculated, and bone formation outside vertebrae was evaluated. One animal died post-operatively and was excluded, and one section was lost and also excluded, leaving 38 sites for assessment. This rate of fusion within cages was 30.0% (three of ten) in the control group, 44.4% (four of nine) in the 50 μg E-BMP-2 group, 60.0% (six of ten) in the 200 μg E-BMP-2 group, and 77.8% (seven of nine) in the 800 μg E-BMP-2 group. Fusion rate was significantly increased by the addition of E-BMP-2 and with increasing E-BMP-2 dose (p = 0.046). In a mini-pig spinal anterior interbody fusion model using porous HA as a carrier, the implantation of E-BMP-2-loaded PEEK cages improved the fusion rate compared with PEEK cages alone, an effect that was significantly increased with increasing E-BMP-2 dosage. Cite this article: Bone Joint J 2013;95-B:217–23.
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Affiliation(s)
- C. J. Hwang
- Asan Medical Center, University of Ulsan
College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul
138-736, Korea
| | - J. H. Lee
- SMG-SNU Boramae Medical Center, Seoul
National University College of Medicine, 395
Shindaebang 2-dong, Dongjak-gu, Seoul
156-707, Korea
| | - H-R. Baek
- SMG-SNU Boramae Medical Center, Seoul
National University College of Medicine, 395
Shindaebang 2-dong, Dongjak-gu, Seoul
156-707, Korea
| | - B-S. Chang
- Seoul National University Hospital, Seoul
National University College of Medicine, 101
Daehak-ro, Jongnu-gu, Seoul
110-744, Korea
| | - C-K. Lee
- Seoul National University Hospital, Seoul
National University College of Medicine, 101
Daehak-ro, Jongnu-gu, Seoul
110-744, Korea
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Rahman CV, Kuhn G, White LJ, Kirby GTS, Varghese OP, McLaren JS, Cox HC, Rose FRAJ, Müller R, Hilborn J, Shakesheff KM. PLGA/PEG-hydrogel composite scaffolds with controllable mechanical properties. J Biomed Mater Res B Appl Biomater 2013; 101:648-55. [DOI: 10.1002/jbm.b.32867] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 10/31/2012] [Accepted: 11/11/2012] [Indexed: 11/10/2022]
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Traini T, Caputi S, Gherlone E, Degidi M, Piattelli A. Fibrin clot extension on zirconia surface for dental implants: a quantitative in vitro study. Clin Implant Dent Relat Res 2013; 16:718-27. [PMID: 23311680 DOI: 10.1111/cid.12038] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
PURPOSE The surface chemical and physical properties of materials used for implants have a major influence on blood clot organization. This study aims to evaluate the blood clot extension (bce) on zirconia and titanium. bce was measured in association to surface roughness (Ra) and static contact angle (θ). MATERIALS AND METHODS Forty disk-shaped samples of sandblasted yttria tetragonal zirconia polycrystal (sb-YTZP), machined titanium (m-Ti), and sandblasted, high-temperature, acid-etched titanium (p-Ti) were used in the present study. About 0.2 mL of human blood, immediately dropped onto the specimen's surface and left in contact for 5 minutes at room temperature, was used to measure the bce. Specimens were observed under confocal scanning laser and scanning electron microscopes. RESULTS The bce (mean × 10(7) ± standard deviation [SD] × 10(6) μm(2) ) was 2.97 ± 6.68 for m-Ti, 5.64 ± 6.83 for p-Ti, and 3.61 ± 7.67 for sb-YTZP. p-Ti samples showed a significantly higher bce. Ra (mean ± SD [μm]) was 0.56 ± 0.7 for m-Ti, 3.78 ± 0.8 for p-Ti, and 2.68 ± 0.6 for sb-YTZP. The difference was not significant between sb-YTZP and p-Ti. θ (mean ± SD) was 55.6 ± 5.6 for m-Ti, 48.7 ± 2.8 for sb-YTZP, and 38.0 ± 2.2 for p-Ti. The difference was not significant between m-Ti and sb-YTZP. CONCLUSIONS The sb-YTZP demonstrated a significantly lesser amount of bce compared with p-Ti specimens, notwithstanding that any significant difference was present between Ra and θ.
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Affiliation(s)
- Tonino Traini
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara, Chieti-Pescara, Italy; Department of Dentistry, San Raffaele Hospital, Vita Salute University, Milano, Italy
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Rice JJ, Martino MM, De Laporte L, Tortelli F, Briquez PS, Hubbell JA. Engineering the regenerative microenvironment with biomaterials. Adv Healthc Mater 2013. [PMID: 23184739 DOI: 10.1002/adhm.201200197] [Citation(s) in RCA: 270] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Modern synthetic biomaterials are being designed to integrate bioactive ligands within hydrogel scaffolds for cells to respond and assimilate within the matrix. These advanced biomaterials are only beginning to be used to simulate the complex spatio-temporal control of the natural healing microenvironment. With increasing understanding of the role of growth factors and cytokines and their interactions with components of the extracellular matrix, novel biomaterials are being developed that more closely mimic the natural healing environments of tissues, resulting in increased efficacy in applications of tissue repair and regeneration. Herein, the important aspects of the healing microenvironment, and how these features can be incorporated within innovative hydrogel scaffolds, are presented.
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Affiliation(s)
- Jeffrey J Rice
- Institute for Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
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Spicer PP, Kretlow JD, Young S, Jansen JA, Kasper FK, Mikos AG. Evaluation of bone regeneration using the rat critical size calvarial defect. Nat Protoc 2012; 7:1918-29. [PMID: 23018195 DOI: 10.1038/nprot.2012.113] [Citation(s) in RCA: 418] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Animal models that are reliably reproducible, appropriate analogs to the clinical condition they are used to investigate, and that offer minimal morbidity and periprocedural mortality to the subject, are the keystone to the preclinical development of translational technologies. For bone tissue engineering, a number of small animal models exist. Here we describe the protocol for one such model, the rat calvarial defect. This versatile model allows for evaluation of biomaterials and bone tissue engineering approaches within a reproducible, non-load-bearing orthotopic site. Crucial steps for ensuring appropriate experimental control and troubleshooting tips learned through extensive experience with this model are provided. The surgical procedure itself takes ∼30 min to complete, with ∼2 h of perioperative care, and tissue collection is generally performed 4-12 weeks postoperatively. Several analytical techniques are presented, which evaluate the cellular and extracellular matrix components, functionality and mineralization, including histological, mechanical and radiographic methods.
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Affiliation(s)
- Patrick P Spicer
- Department of Bioengineering, Rice University, Houston, Texas, USA
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The optimal carrier for BMP-2: a comparison of collagen versus fibrin matrix. Arch Orthop Trauma Surg 2012; 132:1363-70. [PMID: 22660797 DOI: 10.1007/s00402-012-1551-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Indexed: 02/09/2023]
Abstract
INTRODUCTION The aim of our study was to investigate in vitro and in a new in vivo rat model for impaired bone healing whether a low dose BMP-2 preparation in fibrin would be equivalent or better than the combination of collagen and a high dose of BMP-2 which is currently in clinical use. MATERIALS AND METHODS In a 14 day period we compared the in vitro release kinetics of an absorbable collagen sponge (ACS) with 72 μg rhBMP-2 in the BMPC group and fibrin matrix with 10 μg rhBMP-2 in the BMPF group. In our in vivo experiment a critical sized osteotomy was performed in the rat femur, which was filled with a spacer, inhibiting bone formation for a period of 4 weeks. In a second operation this spacer was removed and the test item was applied into the defect. We compared the BMPF and BMPC groups with the ACS alone, FIBRIN alone and the EMPTY (4w/8w) control groups. 4 and 8 weeks after the second operation, specimens were analysed by X-ray and μCT imaging. Mechanically stable femurs were biomechanically evaluated. RESULTS Cumulative BMP-2 release was five times higher in the BMPF group than in the BMPC group during the observation period. μCT analysis revealed that both the extent of bone union and the bone volume were significantly higher in the group with a lower dose of BMP-2 in fibrin matrix than in the groups without BMP-2 treatment. However there was no statistically significant difference between the BMPF and BMPC groups. CONCLUSION We conclude that fibrin matrix is an excellent carrier for BMP-2 and that it provides equivalent results with a sevenfold lower dose of BMP-2 compared with ACS.
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Rahman CV, Ben-David D, Dhillon A, Kuhn G, Gould TWA, Müller R, Rose FRAJ, Shakesheff KM, Livne E. Controlled release of BMP-2 from a sintered polymer scaffold enhances bone repair in a mouse calvarial defect model. J Tissue Eng Regen Med 2012; 8:59-66. [DOI: 10.1002/term.1497] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Revised: 01/17/2012] [Accepted: 01/24/2012] [Indexed: 11/05/2022]
Affiliation(s)
- Cheryl V. Rahman
- Division of Drug Delivery and Tissue Engineering; University of Nottingham; UK
| | - Dror Ben-David
- Department of Anatomy and Cell Biology; Faculty of Medicine, Technion-Israel Institute of Technology; Haifa Israel
| | - Amritpaul Dhillon
- Division of Drug Delivery and Tissue Engineering; University of Nottingham; UK
| | - Gisela Kuhn
- Institute for Biomechanics; ETH Zurich; Switzerland
| | - Toby W. A. Gould
- Division of Drug Delivery and Tissue Engineering; University of Nottingham; UK
| | - Ralph Müller
- Institute for Biomechanics; ETH Zurich; Switzerland
| | | | - Kevin M. Shakesheff
- Division of Drug Delivery and Tissue Engineering; University of Nottingham; UK
| | - Erella Livne
- Department of Anatomy and Cell Biology; Faculty of Medicine, Technion-Israel Institute of Technology; Haifa Israel
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Non-glycosylated BMP-2 can induce ectopic bone formation at lower concentrations compared to glycosylated BMP-2. J Control Release 2012; 159:69-77. [DOI: 10.1016/j.jconrel.2011.12.041] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2011] [Revised: 12/28/2011] [Accepted: 12/29/2011] [Indexed: 11/20/2022]
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Freilich M, Wen B, Shafer D, Schleier P, Dard M, Pendrys D, Ortiz D, Kuhn L. Implant-guided vertical bone growth in the mini-pig. Clin Oral Implants Res 2011; 23:751-757. [DOI: 10.1111/j.1600-0501.2011.02199.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Effects of Choukroun's platelet-rich fibrin on bone regeneration in combination with deproteinized bovine bone mineral in maxillary sinus augmentation: a histological and histomorphometric study. J Craniomaxillofac Surg 2011; 40:321-8. [PMID: 21664828 DOI: 10.1016/j.jcms.2011.04.020] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 03/04/2011] [Accepted: 04/27/2011] [Indexed: 12/11/2022] Open
Abstract
PURPOSE The potential effect of Choukroun's platelet-rich fibrin (PRF) in combination with allograft on promoting bone regeneration has been discussed in previous publications. This study aims to evaluate an influence of PRF on bone regeneration in sinus augmentation in combination with a xenograft, deproteinised bovine bone. MATERIALS AND METHODS Eleven sinuses from 10 patients with posterior maxillary bone atrophy were selected for the study. As a test group, six sinus floor elevations were grafted with a Bio-Oss and PRF mixture, and as control group, five sinuses were treated with Bio-Oss alone. Clinical and radiographic examinations were performed pre- and postoperatively. After 6 months of sinus augmentation, bone biopsies were obtained from the grafted posterior maxilla, and un-decalcified ground sections were prepared. Bone characteristics were evaluated using histological observation and histomorphometric analyses. RESULTS No adverse effect was observed in any case within the follow-up period of 6 months after sinus augmentation. Histological observation showed similar morphological characteristics for both the PRF and control groups. The percentage of new bone formation in the PRF group was about 1.4 times of that in control (18.35%±5.62% vs. 12.95%±5.33%), while the percentage of residual bone substitute in the control group was about 1.5 times higher as that in the PRF group (28.54%±12.01% vs. 19.16%±6.89%). The percentage of contact length between newly formed bone and bone substitute in the PRF group was 21.45%±14.57% vs. 18.57%±5.39% in the control. No significant statistical differences between the two groups were found in these observed parameters. CONCLUSIONS Our preliminary result demonstrated neither an advantage nor disadvantage of the application of PRF in combination with deproteinised bovine bone mineral in sinus augmentation after a healing period of 6 months.
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Wen B, Karl M, Pendrys D, Shafer D, Freilich M, Kuhn L. An evaluation of BMP-2 delivery from scaffolds with miniaturized dental implants in a novel rat mandible model. J Biomed Mater Res B Appl Biomater 2011; 97:315-26. [DOI: 10.1002/jbm.b.31817] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2010] [Revised: 11/14/2010] [Accepted: 12/10/2010] [Indexed: 11/11/2022]
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Vasconcelos A, Cavaco-Paulo A. Wound dressings for a proteolytic-rich environment. Appl Microbiol Biotechnol 2011; 90:445-60. [DOI: 10.1007/s00253-011-3135-4] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 01/17/2011] [Accepted: 01/17/2011] [Indexed: 11/28/2022]
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40
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Barone DTJ, Raquez JM, Dubois P. Bone-guided regeneration: from inert biomaterials to bioactive polymer (nano)composites. POLYM ADVAN TECHNOL 2011. [DOI: 10.1002/pat.1845] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Cloutier M, Girard B, Peel SA, Wilson D, Sándor GK, Clokie CM, Miller D. Calvarial bone wound healing: a comparison between carbide and diamond drills, Er:YAG and Femtosecond lasers with or without BMP-7. ACTA ACUST UNITED AC 2010; 110:720-8. [DOI: 10.1016/j.tripleo.2010.04.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2010] [Revised: 03/21/2010] [Accepted: 04/05/2010] [Indexed: 10/19/2022]
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Kim IS, Lee EN, Cho TH, Song YM, Hwang SJ, Oh JH, Park EK, Koo TY, Seo YK. Promising efficacy of Escherichia coli recombinant human bone morphogenetic protein-2 in collagen sponge for ectopic and orthotopic bone formation and comparison with mammalian cell recombinant human bone morphogenetic protein-2. Tissue Eng Part A 2010; 17:337-48. [PMID: 20868206 DOI: 10.1089/ten.tea.2010.0408] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Nonglycosylated recombinant human bone morphogenetic protein (rhBMP)-2 prepared in Escherichia coli (E. coli rhBMP-2) has recently been considered as an alternative to mammalian cell rhBMP-2. However, its clinical use is still limited owing to lack of evidence for osteogenic activity comparable with that of mammalian cell rhBMP-2 via microcomputed tomography-based analysis. Therefore, this study aimed to evaluate the ability of E. coli rhBMP-2 in absorbable collagen sponge to form ectopic and orthotopic bone and to compare it to that of mammalian rhBMP-2. In vitro investigation was performed to study osteoblast differentiation of human mesenchymal stromal cells. Both types of rhBMP-2 enhanced proliferation, alkaline phosphatase activity, and matrix mineralization of human mesenchymal stromal cells at similar levels. Similar tendencies were observed in microcomputed tomography analysis, which determined bone volume, fractional bone volume, trabecular thickness, trabecular separation, bone mineral density, and other characteristics. Histology from an in vivo osteoinductivity test and from a rat calvarial defect model demonstrated a dose-dependent increase in local bone formation. The E. coli rhBMP-2 group (5 μg) not only induced complete regeneration of an 8-mm critical-sized defect at 4 weeks, but also led to new bone with the same bone mineral density as normal bone at 8 weeks, with the same efficiency as that of mammalian cell rhBMP-2 (5 μg). These uniformly favorable results provide evidence that the osteogenic activity of E. coli rhBMP-2 is not inferior to that of mammalian cell rhBMP-2 despite its low solubility and lack of gylcosylation. These results suggest that the application of E. coli rhBMP-2 in absorbable collagen sponge may be a promising equivalent to mammalian cell rhBMP-2 in bone tissue engineering.
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Affiliation(s)
- In Sook Kim
- Dental Research Institute, Seoul National University, Seoul, Republic of Korea
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Rai B, Lin JL, Lim ZX, Guldberg RE, Hutmacher DW, Cool SM. Differences between in vitro viability and differentiation and in vivo bone-forming efficacy of human mesenchymal stem cells cultured on PCL–TCP scaffolds. Biomaterials 2010; 31:7960-70. [DOI: 10.1016/j.biomaterials.2010.07.001] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2010] [Accepted: 07/01/2010] [Indexed: 01/13/2023]
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Spicer PP, Mikos AG. Fibrin glue as a drug delivery system. J Control Release 2010; 148:49-55. [PMID: 20637815 DOI: 10.1016/j.jconrel.2010.06.025] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Revised: 06/20/2010] [Accepted: 06/29/2010] [Indexed: 11/17/2022]
Abstract
Fibrin glue has been used surgically for decades for hemostasis as well as a sealant. It has also been researched as both a gel for cell delivery and a vehicle for drug delivery. The drug delivery applications for fibrin glue span tissue engineering to chemotherapy and involve several mechanisms for drug matrix interactions and control of release kinetics. Additionally, drugs or factors can be loaded in the gel via impregnation and tethering to the gel through covalent linkages or affinity-based systems. This review highlights recent research of fibrin glue as a drug delivery vehicle.
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Affiliation(s)
| | - Antonios G Mikos
- Department of Bioengineering, Rice University, Houston, TX, USA.
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Goyenvalle E, Aguado E, Pilet P, Daculsi G. Biofunctionality of MBCP ceramic granules (TricOs) plus fibrin sealant (Tisseel) versus MBCP ceramic granules as a filler of large periprosthetic bone defects: an investigative ovine study. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:1949-1958. [PMID: 20238148 DOI: 10.1007/s10856-010-4043-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2009] [Accepted: 03/01/2010] [Indexed: 05/28/2023]
Abstract
We aimed to quantify bone colonization toward an untreated titanium implant with primary stability following filling of the defect with micromacroporous biphasic calcium phosphate (MBCP) granules (TricOs) or MBCP granules mixed with fibrin sealant (Tisseel). Medial arthrotomy was performed on the knees of 20 sheep to create a bone defect (16 mm deep; 10 mm diameter), followed by anchorage of a titanium screw. Defects were filled with TricOs or TricOs-Tisseel granules, a perforated MBCP washer, a titanium washer and titanium screw. Sheep were euthanized at 3, 6, 12 and 26 weeks. From Week 12 onwards, the percentage of bone in contact with the 8 mm anchorage part of the screw increased in both groups, confirming its primary stability. At 26 weeks, whereas bone colonization was similar in both groups, biodegradation of ceramic was more rapid in the TricOs-Tisseel group (P = 0.0422). The centripetal nature of bone colonization was evident. Bone contact with the titanium implant surface was negligible. In conclusion, the use of a model that reproduces a large metaphyseal bone defect around a titanium implant with primary stability, filled with a mixture of either TricOs ceramic granules or TricOs granules mixed with Tisseel fibrin sealant, suggests that the addition of fibrin to TricOs enhances bone filling surgical technology.
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Affiliation(s)
- E Goyenvalle
- UPSP BBToCex, Ecole Nationale Vétérinaire de Nantes, BP 40706, 44307 Nantes Cedex 3, France.
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Autefage H, Briand-Mésange F, Cazalbou S, Drouet C, Fourmy D, Gonçalvès S, Salles JP, Combes C, Swider P, Rey C. Adsorption and release of BMP-2 on nanocrystalline apatite-coated and uncoated hydroxyapatite/beta-tricalcium phosphate porous ceramics. J Biomed Mater Res B Appl Biomater 2009; 91:706-715. [PMID: 19582858 DOI: 10.1002/jbm.b.31447] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The association of bone morphogenetic proteins (BMPs) with calcium phosphate bioceramics is known to confer them osteoinductive properties. The aim of this study was to evaluate the surface properties, especially regarding recombinant human BMP-2 (rhBMP-2) adsorption and release, of commercial sintered biphasic calcium phosphate ceramics after coating with biomimetic nanocrystalline apatite. The raw and coated ceramics exhibited similar macroporous structures but different nanometer-sized pores contents. Both types of ceramics showed Langmuir-type adsorption isotherms of rhBMP-2. The coating noticeably increased the rate of adsorption and the total amount of growth factor taken up, but the maximum coverage per surface area unit as well as the affinity constant appeared lower for coated ceramics compared with raw ceramic surfaces. The limited advantage gained by coating the ceramics can be assigned to a lower accessibility of the surface adsorption sites compared with the raw ceramics. The quantity of rhBMP-2 spontaneously released in cell culture medium during the first weeks was lower for coated samples than for uncoated ceramics and represented a minor fraction of the total adsorbed amount. In conclusion, the nanocrystalline apatite coating was found to favor the adsorption of rhBMP-2 while providing a mean to fine tune the release of the growth factor.
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Affiliation(s)
- Hélène Autefage
- Université de Toulouse, CIRIMAT, UPS-INPT-CNRS, ENSIACET, 31077 Toulouse Cedex 4, France.,Université de Toulouse, Biomechanics Laboratory EA3697, CHU Purpan, 31059 Toulouse Cedex, France
| | - Fabienne Briand-Mésange
- INSERM U563, Centre de physiopathologie de Toulouse Purpan, Dept. Lipoprotéines et Médiateurs Lipidiques, CHU Purpan, 31024 Toulouse Cedex 3, France
| | - Sophie Cazalbou
- Université de Toulouse, CIRIMAT, UPS-INPT-CNRS, ENSIACET, 31077 Toulouse Cedex 4, France
| | - Christophe Drouet
- Université de Toulouse, CIRIMAT, UPS-INPT-CNRS, ENSIACET, 31077 Toulouse Cedex 4, France
| | - Daniel Fourmy
- INSERM U858, Institut Louis Bugnard, 31432 Toulouse Cedex 4, France
| | | | - Jean-Pierre Salles
- INSERM U563, Centre de physiopathologie de Toulouse Purpan, Dept. Lipoprotéines et Médiateurs Lipidiques, CHU Purpan, 31024 Toulouse Cedex 3, France
| | - Christèle Combes
- Université de Toulouse, CIRIMAT, UPS-INPT-CNRS, ENSIACET, 31077 Toulouse Cedex 4, France
| | - Pascal Swider
- Université de Toulouse, Biomechanics Laboratory EA3697, CHU Purpan, 31059 Toulouse Cedex, France
| | - Christian Rey
- Université de Toulouse, CIRIMAT, UPS-INPT-CNRS, ENSIACET, 31077 Toulouse Cedex 4, France
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Bertoldi C, Pinti M, Zaffe D, Cossarizza A, Consolo U, Ceccherelli GB. Morphologic, histochemical, and functional analysis of platelet-rich plasma activity on skeletal cultured cells. Transfusion 2009; 49:1728-37. [DOI: 10.1111/j.1537-2995.2009.02190.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Zhao J, Shinkai M, Takezawa T, Ohba S, Chung UI, Nagamune T. Bone regeneration using collagen type I vitrigel with bone morphogenetic protein-2. J Biosci Bioeng 2009; 107:318-23. [PMID: 19269600 DOI: 10.1016/j.jbiosc.2008.10.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2008] [Revised: 10/15/2008] [Accepted: 10/27/2008] [Indexed: 02/03/2023]
Abstract
Bone morphogenetic protein-2 is a very promising candidate for the treatment of bone diseases and defects, but more effective therapeutic methods are required due to its instability in vivo. A controlled and localized delivery system of Bone morphogenetic protein-2 would be appropriate for effective bone regeneration. Here, we report a novel delivery system of bone morphogenetic protein-2 using vitrigel (a novel stable collagen gel membrane prepared from vitrified type I collagen) for in vivo bone regeneration. Scanning electron microscopy revealed that the collagen vitrigel formed a tightly woven network with average pore sizes of about 1-2 microm. The vitrigel scaffold delivery system exhibited sustained release of bone morphogenetic protein-2 and >80% of the total bone morphogenetic protein-2 was still retained in the vitrigel after 15 days in phosphate-buffered saline in vitro. Bone morphogenetic protein-2-containing vitrigel was transplanted into mouse calvarial defects. The enhanced mechanical strength of the vitrigel made it easier to implant into defects without damage. Obvious bone regeneration was observed in the defects of mice treated with as little as 0.19 microg of bone morphogenetic protein-2 at 4 weeks after the transplantation. The local and sustained delivery system for bone morphogenetic protein-2 developed in the present study may represent a powerful modality for bone regeneration.
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Affiliation(s)
- Jiyuan Zhao
- Department of Chemistry and Biotechnology, School of Engineering, University of Tokyo, Tokyo 113-8656, Japan
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Crouzier T, Ren K, Nicolas C, Roy C, Picart C. Layer-by-layer films as a biomimetic reservoir for rhBMP-2 delivery: controlled differentiation of myoblasts to osteoblasts. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2009; 5:598-608. [PMID: 19219837 DOI: 10.1002/smll.200800804] [Citation(s) in RCA: 171] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Efficient delivery of growth or survival factors to cells is one of the most important long-term challenges of current cell-based tissue engineering strategies. The extracellular matrix acts as a reservoir for a number of growth factors through interactions with its components. In the matrix, growth factors are protected against circulating proteases and locally concentrated. Thus, the localized and long-lasting delivery of a matrix-bound recombinant human bone morphogenetic protein 2 (rhBMP-2) from a biomaterial surface would mimic in vivo conditions and increase BMP-2 efficiency by limiting its degradation. Herein, it is shown that crosslinked poly(L-lysine)/hyaluronan (HA) layer-by-layer films can serve as a reservoir for rhBMP-2 delivery to myoblasts and induce their differentiation into osteoblasts in a dose-dependent manner. The amount of rhBMP-2 loaded in the films is controlled by varying the deposition conditions and the film thickness. Its local concentration in the film is increased up to approximately 500-fold when compared to its initial solution concentration. Its adsorption on the films, as well as its diffusion within the films, is evidenced by microfluorimetry and confocal microscopy observations. A direct interaction of rhBMP-2 with HA is demonstrated by size-exclusion chromatography, which could be at the origin of the rhBMP-2 "trapping" in the film and of its low release from the films. The bioactivity of rhBMP-2-loaded films is due neither to film degradation nor to rhBMP-2 release. The rhBMP-2-containing films are extremely resistant and could sustain three successive culture sequences while remaining bioactive, thus confirming the important and protective effect of rhBMP-2 immobilization. These films may find applications in the local delivery of immobilized growth factors for tissue-engineered constructs and for metallic biomaterial surfaces, as they can be deposited on a wide range of substrates with different shapes, sizes, and composition.
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Affiliation(s)
- Thomas Crouzier
- UMR 5235 Dynamique des Interactions Membranaires Normales et Pathologiques CNRS, Université Montpellier II et I cc 107, Montpellier, France
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