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Tan T, Song D, Hu S, Li X, Li M, Wang L, Feng H. Structure and Properties of Bioactive Glass-Modified Calcium Phosphate/Calcium Sulfate Biphasic Porous Self-Curing Bone Repair Materials and Preliminary Research on Their Osteogenic Effect. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15227898. [PMID: 36431384 PMCID: PMC9699338 DOI: 10.3390/ma15227898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 10/26/2022] [Accepted: 11/07/2022] [Indexed: 06/01/2023]
Abstract
In this study, calcium phosphate (CP)/calcium sulfate biphasic bone repair materials were modified with bioactive-glass (BG) to construct a self-curing bone repair material. Tetracalcium phosphate, calcium hydrogen phosphate dihydrate, and calcium sulfate hemihydrate (CSH) with different BG ratios and phosphate solution were reacted to prepare a porous self-curing bone repair material (CP/CSH/BG). The solidification time was about 12 min, and the material was morphologically stable in 24 h. The porosity was about 50%, with a pore size around 200 μm. The strength of CP/CSH/BG was approaching trabecular bone, and could be gradually degraded in Tris-HCl solution. MC3T3-E1 cells were cultured in the leaching solution of the materials. Cytotoxicity was detected using Cell Counting Kit 8 assays, and the expression of osteogenesis-related biomarkers was detected using quantitative real-time reverse transcription PCR (qRT-PCR). The results showed that all BG groups had increased ALP and ARS staining, implying that the BG groups could promote osteoblast mineralization in vitro. qRT-PCR showed significant upregulation of bone-related gene expression (Osx, Ocn, Runx2, and Col1) in the 20% BG group (p < 0.05). Therefore, the CP/CSH/BG self-curing bone repair materials can promote osteogenesis, and might be applied for bone regeneration, especially for polymorphic bone defect repair.
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Affiliation(s)
- Tao Tan
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing 100081, China
| | - Danyang Song
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing 100081, China
| | - Suning Hu
- Dental Clinic, Peking University International Hospital, Life Garden Road, Changping District, Beijing 102206, China
| | - Xiangrui Li
- Beijing Naton Medical Institute Co., Ltd., Building 1, Yard 9, Chengwan Street, Haidian District, Beijing 100086, China
| | - Mei Li
- Beijing Naton Medical Institute Co., Ltd., Building 1, Yard 9, Chengwan Street, Haidian District, Beijing 100086, China
| | - Lei Wang
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing 100081, China
| | - Hailan Feng
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing Key Laboratory of Digital Stomatology, Haidian District, Beijing 100081, China
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Rethinam S, Nallathambi G, Vijayan S, Basaran B, Mert A, Bayraktar O, A. WA. A new approach for the production of multifilament suture - in vitro and in vivo analysis. INT J POLYM MATER PO 2021. [DOI: 10.1080/00914037.2020.1798432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Senthil Rethinam
- Department of Biotechnology, Sathyabhama Institute of Science and Technology, Chennai, India
- Department of Textile Technology, Anna University, Chennai, India
- School of Natural and Applied Science, Ege University, Bornova/Izmir, Turkey
| | - Gobi Nallathambi
- Department of Textile Technology, Anna University, Chennai, India
| | - Sumathi Vijayan
- School of Electrical and Electronics Engineering, VIT, Chennai, India
| | - Bahri Basaran
- School of Natural and Applied Science, Ege University, Bornova/Izmir, Turkey
| | - Ali Mert
- Department of Statistics, Ege University, Bornova/Izmir, Turkey
| | - Oğuz Bayraktar
- Department of Chemical Engineering, Ege University, Bornova/Izmir, Turkey
| | - Wilson Aruni A.
- Department of Biotechnology, Sathyabhama Institute of Science and Technology, Chennai, India
- California University of Science and Medicine, San Bernardino, CA, USA
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A Novel One-Pot Synthesis and Characterization of Silk Fibroin/α-Calcium Sulfate Hemihydrate for Bone Regeneration. Polymers (Basel) 2021; 13:polym13121996. [PMID: 34207134 PMCID: PMC8235713 DOI: 10.3390/polym13121996] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/13/2021] [Accepted: 06/16/2021] [Indexed: 12/13/2022] Open
Abstract
This study aims to fabricate silk fibroin/calcium sulfate (SF/CS) composites by one-pot synthesis for bone regeneration applications. The SF was harvested from degummed silkworm cocoons, dissolved in a solvent system comprising of calcium chloride:ethanol:water (1:2:8), and then mixed with a stoichiometric amount of sodium sulfate to prepare various SF/CS composites. The crystal pattern, glass transition temperature, and chemical composition of SF/CS samples were analyzed by XRD, DSC, and FTIR, respectively. These characterizations revealed the successful synthesis of pure calcium sulfate dihydrate (CSD) and calcium sulfate hemihydrate (CSH) when it was combined with SF. The thermal analysis through DSC indicated molecular-level interaction between the SF and CS. The FTIR deconvolution spectra demonstrated an increment in the β-sheet content by increasing CS content in the composites. The investigation into the morphology of the composites using SEM revealed the formation of plate-like dihydrate in the pure CS sample, while rod-like structures of α-CSH surrounded by SF in the composites were observed. The compressive strength of the hydrated 10 and 20% SF-incorporated CSH composites portrayed more than a twofold enhancement (statistically significant) in comparison to that of the pure CS samples. Reduced compressive strength was observed upon further increasing the SF content, possibly due to SF agglomeration that restricted its uniform distribution. Therefore, the one-pot synthesized SF/CS composites demonstrated suitable chemical, thermal, and morphological properties. However, additional biological analysis of its potential use as bone substitutes is required.
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Carlisle PL, Guda T, Silliman DT, Hale RG, Brown Baer PR. Are critical size bone notch defects possible in the rabbit mandible? J Korean Assoc Oral Maxillofac Surg 2019; 45:97-107. [PMID: 31106138 PMCID: PMC6502752 DOI: 10.5125/jkaoms.2019.45.2.97] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 08/02/2018] [Accepted: 08/03/2018] [Indexed: 11/07/2022] Open
Abstract
Objectives Small animal maxillofacial models, such as non-segmental critical size defects (CSDs) in the rabbit mandible, need to be standardized for use as preclinical models of bone regeneration to mimic clinical conditions such as maxillofacial trauma. The objective of this study is the establishment of a mechanically competent CSD model in the rabbit mandible to allow standardized evaluation of bone regeneration therapies. Materials and Methods Three sizes of bony defect were generated in the mandibular body of rabbit hemi-mandibles: 12 mm×5 mm, 12 mm×8 mm, and 15 mm×10 mm. The hemi-mandibles were tested to failure in 3-point flexure. The 12 mm×5 mm defect was then chosen for the defect size created in the mandibles of 26 rabbits with or without cautery of the defect margins and bone regeneration was assessed after 6 and 12 weeks. Regenerated bone density and volume were evaluated using radiography, micro-computed tomography, and histology. Results Flexural strength of the 12 mm×5 mm defect was similar to its contralateral; whereas the 12 mm×8 mm and 15 mm×10 mm groups carried significantly less load than their respective contralaterals (P<0.05). This demonstrated that the 12 mm×5 mm defect did not significantly compromise mandibular mechanical integrity. Significantly less (P<0.05) bone was regenerated at 6 weeks in cauterized defect margins compared to controls without cautery. After 12 weeks, the bone volume of the group with cautery increased to that of the control without cautery after 6 weeks. Conclusion An empty defect size of 12 mm×5 mm in the rabbit mandibular model maintains sufficient mechanical stability to not require additional stabilization. However, this defect size allows for bone regeneration across the defect. Cautery of the defect only delays regeneration by 6 weeks suggesting that the performance of bone graft materials in mandibular defects of this size should be considered with caution.
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Affiliation(s)
- Patricia L Carlisle
- Department of Craniomaxillofacial Regenerative Medicine, Dental and Trauma Research Detachment, Fort Sam Houston, TX, USA
| | - Teja Guda
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, TX, USA
| | - David T Silliman
- Department of Craniomaxillofacial Regenerative Medicine, Dental and Trauma Research Detachment, Fort Sam Houston, TX, USA
| | - Robert G Hale
- Department of Craniomaxillofacial Regenerative Medicine, Dental and Trauma Research Detachment, Fort Sam Houston, TX, USA
| | - Pamela R Brown Baer
- Department of Craniomaxillofacial Regenerative Medicine, Dental and Trauma Research Detachment, Fort Sam Houston, TX, USA
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Shuai C, Zhou J, Wu P, Gao C, Feng P, Xiao T, Deng Y, Peng S. Enhanced Stability of Calcium Sulfate Scaffolds with 45S5 Bioglass for Bone Repair. MATERIALS (BASEL, SWITZERLAND) 2015; 8:7498-7510. [PMID: 28793652 PMCID: PMC5458930 DOI: 10.3390/ma8115398] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 10/29/2015] [Accepted: 11/02/2015] [Indexed: 11/17/2022]
Abstract
Calcium sulfate (CaSO₄), as a promising tissue repair material, has been applied widely due to its outstanding bioabsorbability and osteoconduction. However, fast disintegration, insufficient mechanical strength and poor bioactivity have limited its further application. In the study, CaSO₄ scaffolds fabricated by using selective laser sintering were improved by adding 45S5 bioglass. The 45S5 bioglass enhanced stability significantly due to the bond effect of glassy phase between the CaSO₄ grains. After immersing for four days in simulated body fluid (SBF), the specimens with 45S5 bioglass could still retain its original shape compared as opposed to specimens without 45S5 bioglass who experienced disintegration. Meanwhile, its compressive strength and fracture toughness increased by 80% and 37%, respectively. Furthermore, the apatite layer was formed on the CaSO₄ scaffolds with 45S5 bioglass in SBF, indicating good bioactivity of the scaffolds. In addition, the scaffolds showed good ability to support the osteoblast-like cell adhesion and proliferation.
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Affiliation(s)
- Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Jianhua Zhou
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Ping Wu
- College of Chemistry, Xiangtan University, Xiangtan 411105, China.
| | - Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China.
| | - Tao Xiao
- Department of Orthopedics, the Second Xiangya Hospital, Central South University, Changsha 410011, China.
| | - Youwen Deng
- Department of Orthopedics, the Second Xiangya Hospital, Central South University, Changsha 410011, China.
| | - Shuping Peng
- School of Basic Medical Science, Central South University, Changsha 410078, China.
- Hunan Provincial Tumor Hospital and the Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, China.
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A Novel Injectable Magnesium/Calcium Sulfate Hemihydrate Composite Cement for Bone Regeneration. BIOMED RESEARCH INTERNATIONAL 2015; 2015:297437. [PMID: 26114102 PMCID: PMC4465663 DOI: 10.1155/2015/297437] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 03/18/2015] [Indexed: 11/23/2022]
Abstract
Objective. A novel injectable magnesium/calcium sulfate hemihydrate (Mg/CSH) composite with improved properties was reported here. Methods. Composition, setting time, injectability, compressive strength, and bioactivity in simulated body fluid (SBF) of the Mg/CSH composite were evaluated. Furthermore, the cellular responses of canine bone marrow stromal cells (cBMSCs) and bone formation capacity after the implantation of Mg/CSH in tibia defects of canine were investigated. Results. Mg/CSH possessed a prolonged setting time and markedly improved injectability and mechanical property (p < 0.05). Mg/CSH samples showed better degradability than CSH in SBF after 21 days of soaking (p < 0.05). Moreover, the degrees of cell attachment, proliferation, and capability of osteogenic differentiation on the Mg/CSH specimens were higher than those on CSH, without significant cytotoxicity and with the increased proliferation index, ALP activity, and expression levels of integrin β1 and Coll I in cBMSCs (p < 0.05). Mg/CSH enhanced the efficiency of new bone formation at the tibia defect area, including the significantly elevated bone mineral density, bone area fraction, and Coll I expression level (p < 0.05). Conclusions. The results implied that this new injectable bone scaffold exhibited promising prospects for bone repair and had a great potential in bone tissue engineering.
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Influence of Nano-HA Coated Bone Collagen to Acrylic (Polymethylmethacrylate) Bone Cement on Mechanical Properties and Bioactivity. PLoS One 2015; 10:e0129018. [PMID: 26039750 PMCID: PMC4454564 DOI: 10.1371/journal.pone.0129018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Accepted: 05/04/2015] [Indexed: 12/16/2022] Open
Abstract
Objective This research investigated the mechanical properties and bioactivity of polymethylmethacrylate (PMMA) bone cement after addition of the nano-hydroxyapatite(HA) coated bone collagen (mineralized collagen, MC). Materials & Methods The MC in different proportions were added to the PMMA bone cement to detect the compressive strength, compression modulus, coagulation properties and biosafety. The MC-PMMA was embedded into rabbits and co-cultured with MG 63 cells to exam bone tissue compatibility and gene expression of osteogenesis. Results 15.0%(wt) impregnated MC-PMMA significantly lowered compressive modulus while little affected compressive strength and solidification. MC-PMMA bone cement was biologically safe and indicated excellent bone tissue compatibility. The bone-cement interface crosslinking was significantly higher in MC-PMMA than control after 6 months implantation in the femur of rabbits. The genes of osteogenesis exhibited significantly higher expression level in MC-PMMA. Conclusions MC-PMMA presented perfect mechanical properties, good biosafety and excellent biocompatibility with bone tissues, which has profoundly clinical values.
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Han X, Wu X, Liu H, Wang D, E L, Zhou W. Ectopic osteogenesis of an injectable nHAC/CSH loaded with blood-acquired mesenchymal progenitor cells in a nude mice model. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:5338. [PMID: 25577218 DOI: 10.1007/s10856-014-5338-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 07/31/2014] [Indexed: 06/04/2023]
Abstract
An injectable bone cement, nHAC/CSH, which consists of nano-hydroxyapatite/collagen (nHAC) and calcium sulphate hemihydrate (CaSO4.½H2O; CSH) was investigated as a tissue-engineered scaffold material with blood-acquired mesenchymal progenitor cells (BMPCs) as seeding cells. An in vitro study on the cytocompatability of nHAC/CSH and an in vivo study on the ectopic bone formation of nHAC/CSH loaded with dBMPCs were both conducted. The dBMPCs morphology, proliferation, differentiation and apoptosis assays were conducted using the direct contact and extract method. The cells tests exhibited normal growth and bioactive function in vitro. Studies in vivo showed that this injectable tissue engineered bone (ITB) formed bone structure in the heterotopic site of nude mice. These findings indicate that the ITB composed of nHAC/CSH and dBMPCs may represent a useful strategy for clinical reconstruction of irregular bone defects.
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Affiliation(s)
- Xue Han
- Department of Stomatology, 309th Hospital of Chinese People's Liberation Army, Beijing, 100091, China
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Qi X, Li H, Qiao B, Li W, Hao X, Wu J, Su B, Jiang D. Development and characterization of an injectable cement of nano calcium-deficient hydroxyapatite/multi(amino acid) copolymer/calcium sulfate hemihydrate for bone repair. Int J Nanomedicine 2013; 8:4441-52. [PMID: 24293996 PMCID: PMC3839801 DOI: 10.2147/ijn.s54289] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
A novel injectable bone cement was developed by integration of nano calcium-deficient hydroxyapatite/multi(amino acid) copolymer (n-CDHA/MAC) and calcium sulfate hemihydrate (CSH; CaSO4 · 1/2H2O). The structure, setting time, and compressive strength of the cement were investigated. The results showed that the cement with a liquid to powder ratio of 0.8 mL/g exhibited good injectability and appropriate setting time and mechanical properties. In vitro cell studies indicated that MC3T3-E1 cells cultured on the n-CDHA/MAC/CSH composite spread well and showed a good proliferation state. The alkaline phosphatase activity of the MC3T3-E1 cells cultured on the n-CDHA/MAC/CSH composite was significantly higher than that of the cells on pure CSH at 4 and 7 days of culture. The n-CDHA/MAC/CSH cement was implanted into critical size defects of the femoral condyle in rabbits to evaluate its biocompatibility and osteogenesis in vivo. Radiological and histological results indicated that introduction of the n-CDHA/MAC into CSH enhanced new bone formation, and the n-CDHA/MAC/CSH cement exhibited good biocompatibility and degradability. In conclusion, the injectable n-CDHA/MAC/CSH composite cement has a significant clinical advantage over pure CSH cement, and may be a promising bone graft substitute for the treatment of bone defects.
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Affiliation(s)
- Xiaotong Qi
- Department of Orthopedics, The First Affiliated Hospital, Chongqing Medical University, Chongqing, People's Republic of China
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Liu J, Mao K, Liu Z, Wang X, Cui F, Guo W, Mao K, Yang S. Injectable biocomposites for bone healing in rabbit femoral condyle defects. PLoS One 2013; 8:e75668. [PMID: 24146770 PMCID: PMC3797737 DOI: 10.1371/journal.pone.0075668] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 08/16/2013] [Indexed: 11/23/2022] Open
Abstract
A novel biomimetic bone scaffold was successfully prepared in this study, which was composed of calcium sulfate hemihydrate (CSH), collagen and nano-hydroxyapatite (nHAC). CSH/nHAC was prepared and observed with scanning electron microscope and rhBMP-2 was introduced into CSH/nHAC. The released protein content from the scaffold was detected using high performance liquid chromatography at predetermined time interval. In vivo bone formation capacity was investigated by means of implanting the scaffolds with rhBMP-2 or without rhBMP-2 respectively into a critical size defect model in the femoral condyle of rabbit. The releasing character of rhBMP-2 was that an initial burst release (37.5%) was observed in the first day, followed by a sustained release and reached 100% at the end of day 20. The CSH/nHAC showed a gradual decrease in degradation with the content of nHAC increase. The results of X-rays, Micro CT and histological observation indicated that more new bone was formed in rhBMP-2 group. The results implied that this new injectable bone scaffold should be very promising for bone repair and has a great potential in bone tissue engineering.
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Affiliation(s)
- Jianheng Liu
- Department of Orthopaedics, General Hospital of People's Liberation Army, Beijing, China
| | - Kezheng Mao
- Department of Orthopaedics, General Hospital of People's Liberation Army, Beijing, China
| | - Zhengsheng Liu
- Department of Orthopaedics, General Hospital of People's Liberation Army, Beijing, China
| | - Xiumei Wang
- Department of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Fuzhai Cui
- Department of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Wenguang Guo
- Beijing Olympic fine Pharmaceutical Technology Co., Ltd, Beijing, China
| | - Keya Mao
- Department of Orthopaedics, General Hospital of People's Liberation Army, Beijing, China
- * E-mail: (KM); (SY)
| | - Shuying Yang
- Department of Oral Biology, University at Buffalo - SUNY, Buffalo, New York, United States of America
- * E-mail: (KM); (SY)
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Activation of the ERK1/2 signaling pathway during the osteogenic differentiation of mesenchymal stem cells cultured on substrates modified with various chemical groups. BIOMED RESEARCH INTERNATIONAL 2013; 2013:361906. [PMID: 24069599 PMCID: PMC3771309 DOI: 10.1155/2013/361906] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 07/09/2013] [Accepted: 07/16/2013] [Indexed: 12/22/2022]
Abstract
The current study examined the influence of culture substrates modified with the functional groups –OH, –COOH, –NH2, and –CH3 using SAMs technology, in conjunction with TAAB control, on the osteogenic differentiation of rabbit BMSCs. The CCK-8 assay revealed that BMSCs exhibited substrate-dependent cell viability. The cells plated on –NH2- and –OH-modified substrates were well spread and homogeneous, but those on the –COOH- and –CH3-modified substrates showed more rounded phenotype. The mRNA expression of BMSCs revealed that –NH2-modified substrate promoted the mRNA expression and osteogenic differentiation of the BMSCs. The contribution of ERK1/2 signaling pathway to the osteogenic differentiation of BMSCs cultured on the –NH2-modified substrate was investigated in vitro. The –NH2-modified substrate promoted the expression of integrins; the activation of FAK and ERK1/2. Inhibition of ERK1/2 activation by PD98059, a specific inhibitor of the ERK signaling pathway, blocked ERK1/2 activation in a dose-dependent manner, as revealed for expression of Cbfα-1 and ALP. Blockade of ERK1/2 phosphorylation in BMSCs by PD98059 suppressed osteogenic differentiation on chemical surfaces. These findings indicate a potential role for ERK in the osteogenic differentiation of BMSCs on surfaces modified by specific chemical functional groups, indicating that the microenvironment affects the differentiation of BMSCs. This observation has important implications for bone tissue engineering.
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Wang X, Liu Z, Cui F. Biomimetic Synthesis of Self‐Assembled Mineralized Collagen‐Based Composites for Bone Tissue Engineering. Biomimetics (Basel) 2013. [DOI: 10.1002/9781118810408.ch2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
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Zhang X, Guo WG, Cui H, Liu HY, Zhang Y, Müller WEG, Cui FZ. In vitro and in vivo enhancement of osteogenic capacity in a synthetic BMP-2 derived peptide-coated mineralized collagen composite. J Tissue Eng Regen Med 2013; 10:99-107. [PMID: 23364810 DOI: 10.1002/term.1705] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 11/08/2012] [Accepted: 12/20/2012] [Indexed: 01/27/2023]
Abstract
Enhancement of osteogenic capacity was achieved in a mineralized collagen composite, nano-hydroxyapatite/collagen (nHAC), by loading with synthetic peptides derived from BMP-2 residues 32-48 (P17-BMP-2). Rabbit marrow stromal cells (MSCs) were used in vitro to study cell biocompatibility, attachment and differentiation on the mineralized collagen composite by a cell counting kit, scanning electron microscopy (SEM) and real-time reversed transcriptase-polymerase chain reaction analysis (RT-PCR). Optimal peptide dosage (1.0 µg/mL) was obtained by RT-PCR analysis in vitro. In addition, the relative expression level of OPN and OCN was significantly upregulated on P17-BMP-2/nHAC compared with nHAC. In vitro results of P17-BMP-2 release kinetics demonstrated that nHAC released P17-BMP-2 in a controlled and sustained manner. In the rabbit mandibular box-shaped bone defect model, osteogenic capacity of three groups (nHAC, P17-BMP-2/nHAC, rhBMP-2/nHAC) was evaluated. Compared to the nHAC group, bone repair responses in both P17-BMP-2/nHAC and rhBMP-2/nHAC group implants were significantly improved based on histological analysis. The osteogenic response of the P17-BMP-2/nHAC group was similar to that of the rhBMP-2/nHAC group.
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Affiliation(s)
- Xue Zhang
- Department of Orthodontics, School of Stomatology, China Medical University, Shenyang, 110001, China
| | - Wen-Guang Guo
- Beijing Allgens Medical Science & Technology Company, Beijing, 100085, China
| | - Helen Cui
- Beijing Allgens Medical Science & Technology Company, Beijing, 100085, China
| | - Huan-Ye Liu
- Department of Orthodontics, School of Stomatology, China Medical University, Shenyang, 110001, China
| | - Yang Zhang
- Department of Orthodontics, School of Stomatology, China Medical University, Shenyang, 110001, China
| | - Werner E G Müller
- Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University Mainz, Duesbergweg 6, D-55128, Mainz, Germany
| | - Fu-Zhai Cui
- Institute of Regenerative Medical Materials, Department of Materials Science & Engineering, Tsinghua University, Beijing, 100084, China
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Han X, Liu H, Wang D, Su F, Zhang Y, Zhou W, Li S, Yang R. Alveolar bone regeneration around immediate implants using an injectable nHAC/CSH loaded with autogenic blood-acquired mesenchymal progenitor cells: an experimental study in the dog mandible. Clin Implant Dent Relat Res 2011; 15:390-401. [PMID: 21745333 DOI: 10.1111/j.1708-8208.2011.00373.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Lack of osseointegration between a dental implant and the walls of the alveolar bone is a common problem in immediate implantation. Injectable tissue-engineered bone (ITB) may be an effective and minimally invasive solution to the problem. In this study, an injectable bone cement, nHAC/CSH, which consists of nano-hydroxyapatite/collagen (nHAC) and calcium sulfate hemihydrate (CaSO4 .½H2 O; CSH) was investigated as a tissue-engineered scaffold material with blood-acquired mesenchymal progenitor cells (BMPC) as seeding cells. PURPOSE The aim of the study was to assess the new bone formation around immediate dental implants using nHAC/CSH loaded with dog blood-acquired mesenchymal progenitor cells (dBMPC) in a canine model. MATERIALS AND METHODS dBMPC were first isolated from peripheral blood of healthy adult dogs. Alizarin red and oil red O staining were then used to evaluate the potential of dBMPC to differentiate into bi-lineage mesenchymal tissues in vitro. Four healthy mongrel dogs were used in this study. The alveolar bone defects around immediate implants of dogs were created. Each defect was randomly assigned to one of the following three groups: (1) the ITB group (dBMPC+nHAC/CSH); (2) injectable bone cement nHAC/CSH; or (3) no materials (controls). Methylene blue staining was used to examine the bone formation after 3 months. RESULTS Studies in vitro revealed that dBMPC could be induced to osteoblasts and adipocytes. The ITB group (dBMPC+nHAC/CSH) showed significantly more bone-implant contact and bone density than either nHAC/CSH or control groups in the areas with peri-implant defects 3 months after implantation. CONCLUSION The results indicate that the ITB composed of nHAC/CSH and dBMPC may represent a useful strategy for the clinical reconstruction of bone defects around immediate implantation. However, further investigation is needed involving the use of human BMPC as well as possible use of stem cells.
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Affiliation(s)
- Xue Han
- Dental Institute, Chinese PLA General Hospital, Beijing, China
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